WO2024260079A1 - Fan module, motor for portable rotating device and high-speed motor - Google Patents

Abstract

Disclosed in the present application is a fan module, the fan module comprising: an air guide cover, an air inlet being formed in the air guide cover; an air guide pipe, an air outlet corresponding to the air inlet being formed in the air guide pipe, and one end of the air guide pipe facing away from the air outlet being connected to one end of the air guide cover facing away from the air inlet; and a fan assembly, the fan assembly being connected into the air guide pipe, and at least part of the structure of the fan assembly extending out of the air guide pipe and extending into the air guide cover. An air flow channel of the fan module is formed by means of the air guide cover and the air guide pipe, such that an airflow entering the air flow channel can be guided, and the airflow can thus flow to the air outlet from the air inlet more efficiently.

Description

Fan modules, motors for portable rotating equipment and high-speed motors Technical Field

The present application relates to the technical field of fans, and in particular to a fan module, a motor of a portable rotating device, and a high-speed motor.

Background Art

In the hot summer, fans have become a must-have item for people to get rid of the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

The fan in the prior art includes: a housing and a fan assembly disposed in the housing, the housing is provided with an air inlet and an air outlet, and the fan assembly pushes the airflow from the air inlet to the air outlet. The inventor of the present application found in the research that the fan housing in the prior art has a loose structure, lacks guidance for the airflow passing therethrough, and the air outlet efficiency of the fan is low.

Summary of the invention

The main purpose of the present application is to provide a fan module, comprising: an air guide cover, which is provided with an air inlet; an air guide duct, which is provided with an air outlet corresponding to the air inlet, and the end of the air guide duct facing away from the air outlet is connected to the end of the air guide cover facing away from the air inlet; a fan assembly, which is connected to the air guide duct, and at least part of the structure of the fan assembly extends out of the air guide duct and into the air guide cover.

BRIEF DESCRIPTION OF THE DRAWINGS

The present application will illustrate the implementation methods in conjunction with the accompanying drawings. The accompanying drawings of the present application are only used to describe the embodiments for the purpose of demonstration. Without departing from the principles of the present application, those skilled in the art can easily make other embodiments according to the steps described below through the following description.

FIG1-1 is a three-dimensional schematic diagram of a fan module according to a specific embodiment of the present application.

1-2 are cross-sectional views of a fan module according to a specific embodiment of the present application.

1-3 are exploded schematic diagrams of a fan module according to a specific embodiment of the present application.

1-4 are three-dimensional schematic diagrams of a side shell from a top view according to a specific embodiment of the present application.

1-5 are three-dimensional schematic diagrams of a side shell body from a bottom perspective according to a specific embodiment of the present application.

1-6 are exploded schematic diagrams of a fan assembly according to a specific embodiment of the present application.

1-7 are three-dimensional schematic diagrams of an upper shell of a specific embodiment of the present application.

FIG2-1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application.

FIG2-2 is a schematic diagram of the structure of a flexible shell according to a specific embodiment of the present application.

2-3 are schematic diagrams of the structure of an air guide cover according to a specific embodiment of the present application.

2-4 are schematic diagrams of disassembly of a fan module according to a specific embodiment of the present application.

2-5 are cross-sectional views of a fan module according to a specific embodiment of the present application.

2-6 are schematic diagrams of the structure of an air guide duct according to a specific embodiment of the present application.

2-7 is a cross-sectional view of the connection between the bracket and the fan assembly of a specific embodiment of the present application.

FIG3-1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application.

FIG3-2 is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application.

FIG3-3 is a schematic structural diagram of a shell body from a top view of a specific embodiment of the present application.

3-4 are schematic diagrams of the three-dimensional structure of a shell of a specific embodiment of the present application when viewed from a bottom perspective.

3-5 are cross-sectional schematic diagrams of a fan module according to a specific embodiment of the present application.

FIG4-1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application.

FIG4-2 is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application.

FIG4-3 is a schematic diagram of the overall structure of a shell of a specific embodiment of the present application.

FIG4-4 is a schematic structural diagram of a fan blade from a first perspective in a specific embodiment of the present application.

4-5 are schematic structural diagrams of a fan blade from a second viewing angle according to a specific embodiment of the present application.

4-6 are schematic structural diagrams of a fan blade from a third viewing angle according to a specific embodiment of the present application.

FIG5-1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application.

FIG5-2 is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application.

FIG5-3 is a cross-sectional schematic diagram of a fan module according to a specific embodiment of the present application.

FIG5-4 is a schematic diagram of the three-dimensional structure of a shell according to a specific embodiment of the present application.

FIG5-5 is a schematic diagram of the structure of the connection between the shell and the rotating shaft in a specific embodiment of the present application.

5-6 are schematic diagrams of the connection structure between the shell and the PCB circuit board of a specific embodiment of the present application.

FIG6-1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application.

FIG6-2 is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application.

FIG6-3 is a cross-sectional view of a fan module according to a specific embodiment of the present application.

FIG6-4 is a schematic structural diagram of a shell from a first viewing angle according to a specific embodiment of the present application.

FIG6-5 is a schematic structural diagram of a shell from a second viewing angle according to a specific embodiment of the present application.

Figure 6-6 is a schematic structural diagram of a motor housing of a specific embodiment of the present application.

6-7 are structural schematic diagrams of fan blades from a first perspective of a specific embodiment of the present application.

6-8 are structural schematic diagrams of fan blades from a second viewing angle according to a specific embodiment of the present application.

6-9 are schematic structural diagrams of an assembly base from a first perspective according to a specific embodiment of the present application.

6-10 are schematic structural diagrams of an assembly base from a second viewing angle according to a specific embodiment of the present application.

FIG7-1 is a schematic diagram of the overall structure of a fan module according to a specific embodiment of the present application.

FIG7-2 is a schematic diagram of the exploded structure of a fan module according to a specific embodiment of the present application.

FIG7-3 is a schematic structural diagram of a shell from a first viewing angle according to a specific embodiment of the present application.

FIG7-4 is a schematic structural diagram of a shell from a second viewing angle according to a specific embodiment of the present application.

FIG7-5 is a schematic structural diagram of a fan blade from a first perspective of a specific embodiment of the present application.

FIG7-6 is a schematic structural diagram of a fan blade from a second viewing angle according to a specific embodiment of the present application.

FIG8-1 is a schematic diagram of the structure of the portable fan provided in the present application.

FIG8-2 is a schematic diagram of an exploded view of the portable fan provided in the present application.

FIG8-3 is a schematic diagram of an exploded view of a portable fan from another perspective provided in the present application.

FIG8-4 is a cross-sectional view of the portable fan provided in the present application.

FIG8-5 is a cross-sectional view of the portable fan from another perspective provided in the present application.

Figure 8-6 is a schematic diagram of the structure of the cylinder provided in this application.

Figure 8-7 is a schematic diagram of the structure of the portable fan provided in this application with some parts removed.

Figure 8-8 is a cross-sectional view of some parts of the portable fan provided in the present application after removal.

8-9 are exploded schematic diagrams of the portable fan air inlet cover assembly provided in the present application.

FIG9-1 is a schematic diagram of the structure of a buffer component of a fan module provided in an embodiment of the present application.

FIG9-2 is a schematic diagram of the structure of a buffer body in a buffer of a fan module provided in an embodiment of the present application.

FIG9-3 is a schematic diagram of the structure of a limit member in a buffer member of a fan module provided in an embodiment of the present application.

FIG9-4 is a schematic diagram of the structure of an auxiliary buffer component in a buffer component of a fan module provided in an embodiment of the present application.

FIG9-5 is a schematic diagram of the structure of a fan module provided in an embodiment of the present application.

FIG9-6 is a schematic diagram of the structure of a handheld fan provided in an embodiment of the present application.

Figure 9-7 is a schematic diagram of the cross-sectional structure along the A-A line in Figure 9-6 of this application.

FIG10-1 is a schematic diagram of the overall structure of a portable fan according to a specific embodiment of the present application.

FIG10-2 is a schematic diagram of the position structure of the holding portion and the fan assembly of a specific embodiment of the present application.

FIG10-3 is a schematic diagram of an exploded view of a fan assembly according to a specific embodiment of the present application.

FIG10-4 is a schematic diagram of the overall structure decomposition of a portable fan according to a specific embodiment of the present application.

FIG10-5 is a schematic diagram of an exploded view of an assembly tube and a fan assembly according to a specific embodiment of the present application.

FIG10-6 is a schematic diagram of the structure of an assembly tube according to a specific embodiment of the present application.

Figure 10-7 is a schematic diagram of the structure of a connecting tube according to a specific embodiment of the present application.

FIG10-8 is a schematic diagram of the structure of an air inlet ring according to a specific embodiment of the present application.

FIG11-1 is a three-dimensional schematic diagram of the portable fan of the present application.

FIG11-2 is a three-dimensional schematic diagram of the portable fan of the present application.

FIG11-3 is a cross-sectional view of the portable fan of the present application.

Figure 11-4 is an enlarged view of part A in Figure 11-3.

Figure 11-5 is a three-dimensional schematic diagram of the cylinder of the present application.

FIG12-1 is a three-dimensional diagram of the high-speed motor of the present application.

FIG12-2 is a three-dimensional exploded view of the high-speed motor of the present application.

FIG12-3 is a cross-sectional exploded view of the high-speed motor of the present application.

FIG12-4 is a cross-sectional view of the high-speed motor of the present application.

Figure 12-5 is a cross-sectional view of the high-speed motor of the present application when the barrel is removed.

DETAILED DESCRIPTION

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and/or" used in this specification includes any and all combinations of one or more of the related listed items.

Solution 1 is shown in Figures 1-1 to 1-7.

Please refer to FIG. 1-1 and FIG. 1-2 . FIG. 1-1 is a three-dimensional schematic diagram of the fan module of the present embodiment; and FIG. 1-2 is a cross-sectional view of the fan module of the present embodiment.

As shown in Fig. 1-1 and Fig. 1-2, a fan module comprises: a housing 1, a bracket 2 and a fan assembly 3. The housing 1 is provided with an air inlet 133 and an air outlet 113 which are arranged opposite to each other; the bracket 2 is arranged in the housing 1, and the bracket 2 is connected to the inner surface of the housing 1; the fan assembly 3 is arranged in the housing 1, and the fan assembly 3 is connected to the bracket 2; the inner surfaces of the housing 1 and the fan assembly 3 at corresponding positions are configured to be arc-shaped.

A bracket 2 is arranged in the housing 1, and the fan assembly 3 is fixed on the bracket 2, so that the fan assembly 3 and the inner wall of the housing 1 are relatively suspended, and the inner surface of the housing 1 relative to the fan assembly 3 is constructed into an arc shape. When the fan assembly 3 rotates, when the airflow flows from the fan assembly 3 to the inner surface of the housing 1, the arc structure of the arc inner surface can guide the airflow when the airflow contacts the inner surface of the housing 1. The guiding effect of the arc surface on the airflow in contact with it can reduce the energy loss when the airflow contacts the inner surface of the housing 1, and improve the air outlet efficiency of the fan. At the same time, because the structure of the arc inner surface can reduce the backflow of airflow, the air outlet efficiency of the fan is further improved.

Please refer to FIG. 1-3 , which are exploded schematic diagrams of the fan module of this embodiment.

As shown in Figures 1-3, in some embodiments, the housing 1 is composed of an upper housing 11, a side housing 12, and a lower housing 13. The air inlet 133 is provided on the lower housing 13, the air outlet 113 is provided on the upper housing 11, the bracket 2 is arranged in the side housing 12, and the bracket 2 is connected to the inner surface of the side housing 12, and at least part of the structure of the fan assembly 3 is located in the lower housing 13. The structure of the three-section housing can reduce the difficulty of manufacturing the housing. However, the structure of the housing 1 is not limited to this. According to different specific application scenarios, in some embodiments, the housing 1 can be integrally formed, or can be composed of two shell structures spliced together.

A bracket 2 is provided in the housing 1, and the bracket 2 includes: a receiving chamber 21 and a plurality of air guide plates 22 connected to the receiving chamber 21. The receiving chamber 21 is hollow inside and contains a battery 27. Placing the battery 27 in the receiving chamber 21 can eliminate the need for a handle for the battery 27 in the fan module, further simplifying the structure of the fan module and reducing the volume of the fan module. However, the installation position of the battery 27 in the fan module is not limited thereto. In some embodiments, the fan module is provided with a handle, and the battery 27 is installed in the handle.

The accommodating cavity 21 is configured in a cylindrical shape. However, the shape of the accommodating cavity 21 is not limited thereto, and the accommodating cavity 21 can be configured in a hemispherical shape, an ellipsoidal shape, a conical shape, a triangular shape, or the like according to different specific application scenarios.

One end of the plurality of air guide plates 22 is connected to the inner surface of the housing 1, and the other end of the plurality of air guide plates 22 is connected to the accommodating cavity 21, and the fan assembly 3 is connected to the accommodating cavity 21. The arrangement of the air guide plates 22 enables the accommodating cavity 21 to be arranged in a suspended posture inside the housing 1. Two adjacent air guide plates 22, the outer wall of the accommodating cavity 21 between the two adjacent air guide plates 22, and the inner surface of the corresponding housing 1 together form an air duct.

Specifically, the number of the air guide plates 22 is 5. However, the number of the air guide plates 22 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the air guide plates 22 can be: 1, 2, 3, 4, 6 or more.

A plurality of air guide plates 22 are arranged around the accommodating cavity 21, and the plurality of air guide plates 22 are bent and extended in the direction from the air outlet 113 to the air inlet 133. Specifically, the plurality of air guide plates 22 are bent near one end of the fan assembly 3, and the bending direction of the bent end of the plurality of air guide plates 22 is opposite to the rotation direction of the fan assembly 3. When the fan assembly 3 rotates, the airflow is driven to rotate in the direction of rotation of the fan assembly 3. Therefore, inside the fan module, the rotation direction of the airflow is the same as the rotation direction of the fan assembly 3. The bending direction of the bent end of the air guide plate 22 is opposite to the rotation direction of the fan assembly 3. This structure enables the airflow to contact the airflow at an obtuse angle greater than 90° when the air guide plate 22 contacts the airflow. Since the function of the air guide plate 22 is to guide the airflow to the air outlet 113, the angle between the air guide plate 22 and the airflow when in contact is an obtuse angle, which can improve the air guiding efficiency of the air guide plate 22 and improve the air outlet efficiency of the fan module.

Please refer to FIG. 1-4 , which is a three-dimensional schematic diagram of the side shell body from a top view of the present embodiment.

As shown in Figs. 1-4, the housing 1 is connected to the accommodating chamber 21, and an assembly groove 24 is provided at the connection position, and the assembly groove 24 is provided with a control component 4. The connection between the housing 1 and the accommodating chamber 21 can be the connection between the inner wall of the accommodating chamber 21 and the outer wall of the housing 1, and can also be the connection between the outer wall of the accommodating chamber 21 and the inner surface of the housing 1.

The assembly slot 24 includes a first slot surface 241, a second slot surface 242, and an inclined surface connecting the first slot surface 241 and the second slot surface 242. The length of the first slot surface 241 is greater than the length of the second slot surface 242. Therefore, from the direction of the air outlet 113 to the air inlet 133, the cross-sectional area of the assembly slot 24 in the extending direction of the inclined surface becomes smaller and smaller, so that one end of the assembly slot 24 forms a wind guide angle (not marked). The structure of the wind guide angle can effectively reduce the space occupied by the assembly slot 24 in the housing 1 and increase the area of the air duct in the housing 1. At the same time, the triangular structure can reduce the resistance to the airflow by the wind guide angle and improve the air outlet efficiency of the fan module. The inclination direction of the inclined surface is the same as the bending direction of the air guide plate 22, which is also conducive to the wind guide angle to guide the air. In some embodiments, the inward depression of the first slot surface 241 of the wind guide angle is formed in the same bending direction as the air guide plate 22, playing the same role as the air guide plate 22, further improving the wind guide efficiency of the wind guide angle.

The wind guide corner is configured as a triangle, but the shape of the wind guide corner is not limited thereto. Depending on the specific application scenario, the wind guide corner can be configured as a crescent shape.

The control component 4 is fixed in the assembly groove 24 by plugging. A first stopper 243 extending along the vertical direction of the first groove surface 241 is provided on the first groove surface 241, a second stopper 244 extending along the second groove surface 242 is provided on the second groove surface 242, and a third stopper 245 and a fourth stopper 246 are arranged side by side on the inclined surface. The first stopper 243, the second stopper 244, the third stopper 245 and the fourth stopper 246 are used to stop the control component 4 from moving in the direction of the accommodating cavity 21. The fixing method of the control component 4 and the assembly groove 24 is not limited to plugging. According to different specific application scenarios, in some embodiments, the fixing method of the control component 4 and the assembly groove 24 can be (not limited to): adhesive fixing or interference fit fixing.

The installation position of the assembly slot 24 is not limited to the side shell 12. For example, when the fan module is integrally formed with the shell 1, the assembly slot 24 can be provided on the surface of the shell 1. When the shell 1 is a two-stage splicing structure, the assembly slot 24 can be provided on any one of the two-stage structures.

The control component 4 includes a rotary encoder 41, a charging interface 42 and a control PCB circuit board 43, wherein the rotary encoder 41 and the charging interface 42 are fixed on the control PCB circuit board 43. The rotation of the rotary encoder 41 is used to steplessly adjust the speed of the fan assembly 3, and at the same time, the pressing function of the rotary encoder 41 is used to turn the fan assembly 3 on or off. The control PCB circuit has circuit pins (not marked), and the circuit pins are electrically connected to the battery 27 and the fan assembly 3 through wires.

The control assembly 4 further includes a buckle plate 44, which is buckled onto the rotary encoder 41, the charging interface 42 and the control PCB circuit board 43, and the buckle plate 44 is provided with corresponding openings for the rotary encoder 41 and the charging interface 42, so as to expose the rotary encoder 41 and the charging interface 42. The provision of the buckle plate 44 can make the installation of the control assembly 4 more convenient.

A wiring hole 26 is provided on the end surface of the accommodating cavity 21 connected to the fan assembly 3. The location of the wiring hole 26 can prevent the wire from appearing in the air duct and causing obstruction to the airflow, thereby improving the smoothness of the airflow inside the fan module and protecting the safety of the wire.

Please refer to FIG. 1-5 , which is a three-dimensional schematic diagram of the side shell of this embodiment from a bottom view.

As shown in Fig. 1-3 and Fig. 1-5, a connecting column 23 is provided at one end of the accommodating chamber 21 connected to the fan assembly 3 in the direction of the air outlet 113, and the fan assembly 3 is connected to the connecting column 23. The shape of the connecting column 23 is configured to be cylindrical, but the structure of the connecting column 23 is not limited thereto, and according to different specific application scenarios, the shape of the connecting column 23 can be (not limited to): prism or cone, etc.

The fan assembly 3 includes: a fan blade 31, a magnetic ring 312, a coil 32 and a rotating shaft 35. The coil 32 is arranged on the connecting column 23, the magnetic ring 312 is arranged in the fan blade 31, the magnetic ring 312 is sleeved on the coil 32, one end of the rotating shaft 35 is connected to the fan blade 31, and the other end of the rotating shaft 35 passes through the magnetic ring 312 and the coil 32 and is connected to the connecting column 23.

The coil 32 is sleeved on the connecting post 23 and fixed to the connecting post 23 by interference fit. The fixing method of the coil 32 and the connecting post 23 is not limited thereto. In some embodiments, the coil 32 can also be fixed to the connecting post 23 by gluing.

Please refer to FIG. 1-6 , which are exploded schematic diagrams of the fan assembly of this embodiment.

As shown in Fig. 1-3 and Fig. 1-6, a storage cavity 311 is provided on the fan blade 31, and a magnetic ring 312 is fixed in the storage cavity 311 by interference fit or gluing, and the magnetic ring 312 is sleeved on the coil 32, that is, the coil 32 is also located in the storage cavity 311 of the fan blade 31. The structural method of the fan assembly 3 can concentrate the power part of the fan assembly 3 inside the fan blade 31, greatly reducing the volume of the fan assembly 3 and making the fan module more compact.

The inner surface of the accommodating cavity 21 at a position corresponding to the connecting column 23 is recessed along the extending direction of the connecting column 23 to form an installation cavity 25 . The installation cavity 25 is provided with an installation hole 231 . One end of the rotating shaft 35 connected to the connecting column 23 is inserted into the installation hole 231 .

The shape of the installation cavity 25 is configured to be conical. However, the shape of the installation cavity 25 is not limited thereto, and according to different specific application scenarios, the shape of the installation cavity 25 can be (but not limited to): hemispherical, cylindrical or prismatic.

The mounting hole 231 is provided at the end of the mounting cavity 25, and the connecting column 23 includes a sleeve 33, which passes through the mounting hole 231 and is inserted into the mounting cavity 25. One end of the rotating shaft 35 connected to the connecting column 23 passes through the sleeve 33 and is inserted into the mounting cavity 25. A slot 351 is provided at one end of the rotating shaft 35 connected to the connecting column 23, and a retaining spring 34 cooperating with the slot 351 is provided in the mounting cavity 25 to lock the rotating shaft 35 in the mounting hole 231.

The shaft sleeve 33 is configured to be cylindrical. However, the shape of the shaft sleeve 33 is not limited thereto, and according to different specific application scenarios, in some embodiments, the shaft sleeve 33 can be (not limited to) prism-shaped or shuttle-shaped.

Since the connection between the retaining spring 34 and the rotating shaft 35 is performed in the installation cavity 25 , the conical structure of the installation cavity 25 can make the installation of the retaining spring 34 more convenient.

The sleeve 33 can be completely disposed in the mounting cavity 25, or one end can be inserted into the mounting cavity 25 and the other end can extend out of the mounting cavity 25. When the sleeve 33 is completely disposed in the mounting cavity 25, the coil 32 is sleeved on the connecting column 23. When only one end of the sleeve 33 is inserted into the mounting cavity 25, the coil 32 can be sleeved on the sleeve 33.

The sleeve 33 is made of metal or alloy. The setting of the sleeve 33 can effectively improve the strength of the connecting shaft and prevent the connecting shaft from being deformed by external force. When the coil 32 is sleeved on the connecting column 23, the sleeve 33 has a strong anti-extrusion ability, which can improve the connection strength of the interference fit between the coil 32 and the sleeve 33.

As shown in Fig. 1-2, the lower housing 13 includes a bottom surface 132 and a first side edge 131 connected to the bottom surface 132. The air inlet 133 is provided on the bottom surface 132, and the area of the air inlet 133 is smaller than the area of the bottom surface 132. The smooth transition between the bottom surface 132 and the first side edge 131 forms an arc on the inner surface of the lower housing 13. The area of the air inlet 133 is smaller than the area of the bottom surface 132, and the smooth transition between the bottom surface 132 and the first side edge 131 makes the connecting part of the two present an arc. The structure of the lower housing 13 can make the surface of the lower housing 13 play a role in guiding the airflow. At the same time, the area of the air inlet 133 is smaller than the area of the bottom surface 132, so that the edge of the bottom surface 132 has an intercepting effect on the internal airflow, reducing the backflow airflow and improving the air outlet efficiency of the fan module.

The air inlet 133 is provided with a filter cover 6, which can prevent foreign objects such as clothes or hair from entering the fan module when the user is using the fan, and can also prevent hard foreign objects from entering the fan module and damaging the fan module.

The filter cover 6 is circular in shape, and is provided with regularly arranged hollow grids for air intake. The shape of the filter cover 6 is not limited thereto, and can be arbitrarily set to (not limited to) square, oval, prism, etc. according to different specific application scenarios.

Please refer to FIG. 1-7 , which is a three-dimensional schematic diagram of the upper shell in this embodiment.

As shown in Fig. 1-7, the upper housing 11 includes: a top surface 112 and a second side 111 connected to the top surface 112, an air outlet 113 is arranged on the top surface 112, and a smooth transition is formed between the top surface 112 and the second side 111. The fan module also includes: a receiving cover 115, the receiving cover 115 is arranged above the receiving cavity 21, and the receiving cover 115 and the upper housing 11 are connected through a plurality of air outlet plates 114, and the plurality of air outlet plates 114 correspond to the plurality of air guide plates 22 one by one.

The accommodating cover 115 includes: a cover wall and a visible window 116 opened on the cover wall. The cover wall and the visible window 116 smoothly transition to form an arc surface. Multiple air outlet plates 114 extend along the arc surface of the cover wall from the radial direction of the cover wall to the axial direction of the cover wall.

The number of air outlet plates 114 is set in accordance with the number of air guide plates 22, and the positions where the air outlet plates 114 contact the air guide plates 22 have the same shape. The air outlet plates 114 divide the air outlet 113 into a plurality of trapezoidal air outlet ducts, which are composed of a portion of the outer surface of the receiving cover 115, the inner surface of the upper shell 11, and two adjacent air outlet plates 114. Since the outer surface of the receiving cover 115 and the inner surface of the upper shell 11 are both configured in an arc shape, the resistance to the airflow is smaller, which can improve the air outlet efficiency of the fan module.

A display assembly 5 is arranged between the accommodating cover 115 and the accommodating cavity 21, and a perspective plate 7 for observing the display assembly 5 is arranged on the visual window 116. The display assembly 5 includes: a display 51 and a display PCB circuit board 52, wherein the display 51 can be (but not limited to): a grid display 51 or a liquid crystal display 51. The display assembly 5 is connected to the controller assembly through a wire. The perspective plate 7 can be (but not limited to): made of glass or translucent plastic.

An assembly cover is also provided between the receiving cover 115 and the upper shell 11, and the assembly cover is buckled on the assembly cavity. The assembly cover is provided between the two air outlet plates 114, and the assembly cover is provided along the

The inner surface of the upper shell 11 is configured to be arc-shaped, and the surface of the receiving cover 115 is also configured to be arc-shaped. The receiving cover 115 and the arc-shaped surfaces of the upper shell 11 are configured to form a triangle as a whole. The structure of the receiving cover 115 can reduce the obstruction to the airflow of the air outlet 113 and increase the air outlet area of the air outlet 113.

In this embodiment, two PCB circuit boards are provided: a control PCB circuit board 43 and a display PCB circuit board 52. Therefore, there are two wiring methods inside the fan module in this embodiment. The first method: the battery 27 and the fan assembly 3 are respectively connected to the control PCB circuit board 43 with wires, and the control PCB circuit board 43 is then connected to the display PCB circuit board 52 with wires. The second method: the battery 27 and the fan assembly 3 are respectively connected to the display PCB circuit board 52 with wires, and the control PCB circuit board 43 is then connected to the display PCB circuit board 52 with wires. In both wiring methods, the wires corresponding to the fan assembly 3 extend into the accommodating cavity 21 through the wiring holes 26.

The fan module in this embodiment can be used as a component of a handheld fan, a desktop fan, a floor fan, a bladeless fan or an industrial fan, etc. In some application scenarios, the fan module can be used alone as a handheld fan.

Option 2 is shown in Figures 2-1 to 2-7.

Example 1

Please refer to FIG. 2-1 , which is a schematic diagram of the overall structure of the fan module of this embodiment.

As shown in FIG2-1, a fan module includes: an air duct 2, an air duct 1, and a fan assembly 3. The air duct 2 is provided with an air inlet 21; the air duct 1 is provided with an air outlet 11 corresponding to the air inlet 21, and the end of the air duct 1 facing away from the air outlet 11 is connected to the air duct 2. The fan assembly 3 is connected to the air duct 1 , and at least part of the structure of the fan assembly 3 extends out of the air duct 1 and into the air duct cover 2 .

In this embodiment, the air duct 2 and the air duct 1 are connected by snapping. However, the connection method of the air duct 2 and the air duct 1 is not limited to this. According to different specific application scenarios, in some embodiments, the air duct 2 and the air duct 1 can also be connected by (not limited to): gluing, overlapping or hot pressing fusion; in some embodiments, the air duct 2 and the air duct 1 can also be integrally formed.

Please refer to FIG. 2-2 , which is a schematic diagram of the structure of the flexible shell of this embodiment.

As shown in FIG2-2, in some embodiments, the air duct 2 and the air duct 1 are further provided with a flexible shell 4 on the outside, and the flexible shell 4 is specifically a silicone shell. However, the material made of the flexible shell 4 is not limited thereto. Depending on the specific application scenario, in some embodiments, the material made of the flexible shell 4 can be (but not limited to): foam, paper or fabric. The provision of the flexible shell 4 can provide good protection for the air duct 2, the air duct 1 and the fan assembly 3. At the same time, when the fan module is used as a modular accessory of the fan, the deformation ability of the flexible shell 4 can adapt well to different fan casing sizes, and the larger friction coefficient on the surface of the flexible shell 4 can also make the fan module more firmly connected to the fan casing.

When the flexible shell 4 is sleeved outside the air guide cover 2 and the air guide pipe 1, the air guide cover 2 and the air guide pipe 1 can be connected in an overlapping manner.

The outer surface of the flexible shell 4 is raised to form a plurality of convex rings 41. The plurality of convex rings 41 are arranged at intervals along the vertical length direction of the flexible shell 4. For example, three convex rings 41 are arranged on the flexible shell 4, respectively located at the two ends and the middle position of the flexible shell 4. However, the number and arrangement of the convex rings 41 on the flexible shell 4 are not limited thereto. According to different specific application scenarios, in some embodiments, the number of the convex rings 41 on the flexible shell 4 can be (not limited to): 2, 4, 5, 6 or more. The arrangement between the convex rings 41 can be (not limited to): spaced arrangement, equidistant arrangement, concentrated arrangement, etc. The provision of the convex rings 41 can reduce the contact area between the fan module and the fan housing, improve the assembly efficiency of the fan module and the fan housing, and at the same time, enable the convex rings 41 to have a larger deformation space, so as to adapt to a wider range of fan housing sizes.

In some embodiments, the outer surface of the flexible shell 4 is raised to form a plurality of convex points 43, and the plurality of convex points 43 are evenly arranged on the outer surface of the flexible shell 4. The provision of the convex points 43 can reduce the contact area between the fan module and the fan housing, improve the assembly efficiency of the fan module and the fan housing, and at the same time, the convex points 43 have a larger deformation space, which can adapt to a wider range of fan housing sizes.

In some embodiments, the outer surface of the flexible shell 4 is raised to form a plurality of convex rings 41 and a plurality of convex points 43, and a plurality of convex points 43 are arranged between two adjacent convex rings 41 in the plurality of convex rings 41. The number of convex points 43 is much greater than the number of convex rings 41, and the apex of the convex point 43 is flush with the outer surface of the convex ring 41. Compared with the structure of separately setting the convex ring 41 or the convex point 43, the combined configuration of the convex ring 41 and the convex point 43 makes the contact area between the flexible shell and the fan shell larger and the connection more stable. The interval arrangement of the convex ring 41 and the convex point 43 allows the convex ring 41 and the convex point 43 to each have a larger deformation space, so as to adapt to a wider range of fan shell sizes.

In some embodiments, the shell that is sleeved outside the air guide cover 2 and the air guide duct 1 can be a metal shell or a hard plastic shell.

Please refer to FIG. 2-3, which is a schematic diagram of the structure of the air guide cover of this embodiment.

As shown in Figures 2-3, in this embodiment, the air guide cover 2 is configured as a cylindrical barrel, and the outside of the air guide cover 2 is concave, so that the inner surface of the air guide cover 2 is raised to form a neck ring 22, and the neck ring 22 is arranged at a position corresponding to one end of the fan blade assembly 32 facing the air inlet 21. The neck ring 22 divides the air guide cover 2 into two trumpet-shaped barrel structures, namely the first cover body 23 and the second cover body 24, wherein the air inlet 21 is opened on the first cover body 23, and the second cover body 24 is connected to the air guide duct 1. There is a smooth transition between the first cover body 23 and the neck ring 22, and there is also a smooth transition between the second cover body 24 and the neck ring 22. The hub 321 and the plurality of blades 322 of the fan blade assembly 32 are all suspended in the second cover body 24, and the inner surface of the second cover body 24 corresponding to the hub 321 is configured to be arc-shaped. The inner surface structure of the air guide cover 2 is smooth, and has a good guiding effect on the airflow. The setting of the necking ring 22 pressurizes the airflow entering the air guide cover 2, so that the airflow entering the air guide cover 2 has a higher initial velocity and a faster airflow speed. The necking ring 22 is set at a position corresponding to one end of the fan blade assembly 32 facing the air inlet 21, which can block and guide the reverse airflow generated when the fan blade assembly 32 rotates, thereby improving the air outlet efficiency of the fan module. The inner surface of the second cover body 24 corresponding to the hub 321 is configured to be arc-shaped, which can guide the lateral airflow generated by the rotation of the blades 322, so that the airflow is turned from lateral collision to the surface of the second cover body 24 to the direction of the air outlet 11, thereby improving the air outlet efficiency.

In some embodiments, a plurality of reinforcing ribs 25 are provided on the outer surfaces of the first cover 23 and the second cover 24. Each reinforcing rib 25 is connected to the first cover 23, the neck ring 22, and the second cover 24. The number of reinforcing ribs 25 is 2, but the number of reinforcing ribs 25 is not limited thereto. According to different specific application scenarios, in some embodiments, the number of reinforcing ribs 25 can be (not limited to): 3, 4, 5 or more.

The first cover body 23, the neck ring 22 and the second cover body 24 can be connected and manufactured in one piece, or they can be manufactured separately and then spliced together.

Please refer to Figures 2-4 and 2-5. Figure 2-4 is a schematic diagram of the disassembly of the fan module of this embodiment; Figure 2-5 is a cross-sectional view of the fan module of this embodiment.

As shown in Fig. 2-4 and Fig. 2-5, the fan assembly 3 includes: a motor assembly 31 and a blade assembly 32, one end of the motor assembly 31 is connected to the air duct 1, and the fan assembly 3 is sleeved on the motor assembly 31. The blade assembly 32 includes: a hub 321, a connecting ring 323 and a plurality of blades 322, the plurality of blades 322 are arranged around the hub 321 along the circumference of the hub 321 on the surface of the hub 321, one end of the connecting ring 323 is connected to the hub 321, and the other end of the connecting ring 323 is sleeved on the motor assembly 31. The motor assembly 31 includes: a rotating shaft 313, a coil 311 and a magnetic ring 312, a connecting portion 5 is provided on the storage tube 12, one end of the rotating shaft 313 is connected to the storage tube 12, and the other end of the rotating shaft 313 is connected to the blade assembly 32, the coil 311 is provided on the connecting portion 5, the magnetic ring 312 is provided on the blade assembly 32, and the magnetic ring 312 is sleeved on the coil 311.

In this embodiment, the hub 321 is configured to be conical. The conical hub 321 can make the distance between the hub 321 and the inner side of the first cover 23 larger, thereby making the area of the blades 322 larger, thereby improving the air outlet efficiency of the fan module. However, the structure of the hub 321 is not limited to this. According to different specific application scenarios, in some embodiments, the hub 321 can be configured to be: hemispherical, cylindrical or prismatic, etc.

The multiple blades 322 are bent and extended along the conical surface of the hub 321 from the direction of the air inlet 21 to the direction of the air outlet 11, and the bending direction of the multiple blades 322 is opposite to the rotation direction of the fan blade assembly 32. Each blade 322 of the multiple blades 322 includes: a first end 322a adjacent to the air outlet 11 and a second end 322b corresponding to the first end 322a, and the width of the first end 322a is greater than the width of the second end 322b. This structural mode of the blade 322 can make the first end 322a have a larger contact area with the airflow when cutting the wind, and the restraining force on the airflow is stronger, which can push more airflow into the fan blade airway formed by two adjacent blades 322. As the airflow flows from the first end 322a to the second end 322b, the width of the blade 322 gradually decreases, and the ability of the blade 322 to restrain the airflow gradually decreases, releasing part of the energy of the airflow, reducing the collision kinetic energy of the airflow outflowing from the fan blade and the second cover body 24 and the air guide duct 1, reducing the loss of airflow energy, and improving the air outlet efficiency.

The blade spacing between two adjacent blades 322 in the plurality of blades 322 gradually increases from the direction of the air inlet 21 to the direction of the air outlet 11. The distance between adjacent blades 322 along the direction of the airflow is getting larger and larger, which can gradually release the energy of the airflow during the airflow, reduce the collision kinetic energy of the airflow outflowing fan blades with the second cover body 24 and the air guide shell 14, reduce the loss of airflow energy, and improve the air outlet efficiency.

The hub 321 and the plurality of blades 322 are located in the air duct 2, one end of the connecting ring 323 sleeved with the motor assembly 31 extends into the air duct 1, and one end of the connecting ring 323 connected to the hub 321 is located in the air duct 2. Specifically, the hub 321 and the plurality of blades 322 are located in the first cover body 23, a part of the connecting ring 323 extends into the air duct 1, and the other end of the connecting ring 323 is connected to the bottom surface of the hub 321.

There is a gap between the bottom surface of the hub 321 and the position of the corresponding air guide duct 1 to facilitate the rotation of the fan blade assembly 32.

In this embodiment, the number of blades 322 is 5. However, the number of blades 322 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of blades 322 can be (not limited to): 2, 3, 4, 6 or more.

Please refer to FIG. 2-6 , which is a schematic diagram of the structure of the air duct of this embodiment.

The air guide duct 1 includes: an air guide shell 14, a storage tube 12 and a plurality of air guide plates 13. The storage tube 12 is arranged in the air guide shell 14. The plurality of air guide plates 13 are arranged around the circumference of the storage tube 12, and one end of the plurality of air guide plates 13 is connected to the inner surface of the air guide shell 14, and the other end of the plurality of air guide plates 13 is connected to the storage tube 12. The air guide shell 14 is connected to the air guide cover 2, and the motor assembly 31 is connected to the storage tube 12. The air guide shell 14, the storage tube 12 and the plurality of air guide plates 13 enclose an air outlet 11.

The air guide shell 14 is configured in a tubular shape, one end of the air guide shell 14 is connected to the second cover body 24 of the air guide cover 2, and the other end of the air guide shell 14 is provided with an air outlet 11. A storage tube 12 is provided inside the air guide shell 14, and the storage tube 12 is suspended in the center of the air guide shell 14, and a plurality of air guide plates 13 are respectively connected to the air guide shell 14 and the storage tube 12. A gap is left between the air guide shell 14 and the storage tube 12 for air flow. The number of air guide plates 13 is specifically 7. However, the number of air guide plates 13 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of air guide plates 13 can be 2, 3, 4, 5, 6, 8 or more. The air guide plates 13 divide the air outlet 11 into a plurality of arc-shaped air ducts.

Multiple air guide plates 13 are bent at one end close to the fan assembly 3, and the bending direction of the bent ends of the multiple air guide plates 13 is opposite to the rotation direction of the fan assembly 3. The bending direction of the air guide plate 13 is opposite to the rotation direction of the fan assembly 3. When the fan assembly 3 rotates, it will drive the airflow to rotate in the same direction. At this time, the bending direction of the air guide plate 13 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the bent part of the air guide plate 13. Due to the opposite directions, the angle between the airflow and the bent part of the air guide plate 13 when they contact is greater than 90 degrees. The airflow contacts the air guide plate 13 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 13. During the contact process at a larger angle, the air guide plate 13 has a significant guiding effect on the airflow, with less energy loss, which greatly improves the air outlet efficiency.

The storage tube 12 is cylindrical, and a cover 122 is provided on the surface of the storage tube 12 located on the side of the air outlet 11. The cover 122 can be integrally manufactured with the storage tube 12, or can be manufactured separately and then assembled and connected. A storage cavity 121 is provided on the side of the storage tube 12 connected to the motor assembly 31, and one end of the connecting ring 323 of the fan blade assembly 32 extends into the storage tube 12.

The hub 321 and the plurality of blades 322 are arranged between the necking ring 22 and the storage tube 12. At this time, the hub 321 acts as a shield for the storage tube 12, which can prevent the airflow from flowing from the blades 322 into the storage tube 12, resulting in unnecessary energy loss, and improve the air outlet efficiency. The necking ring 22 can reduce the airflow inside the fan module for reflux, and can also further improve the air outlet efficiency.

In some embodiments, the cross-sectional area of one end of the hub 321 connected to the connecting ring 323 is greater than or equal to the cross-sectional area of the storage tube 12. Since the hub 321 acts as a shield for the storage tube 12 and the storage cavity 121, when the cross-sectional area of one end of the hub 321 connected to the connecting ring 323 is greater than or equal to the cross-sectional area of the storage tube 12, the hub 321 can be reduced to the maximum extent, and the airflow flowing through the blades 322 collides with the edge of the storage tube 12, which can also prevent the airflow from flowing back into the storage cavity 121, resulting in unnecessary energy loss, and further improving the air outlet efficiency.

Please refer to FIG. 2-7 , which is a cross-sectional view of the connection between the bracket and the fan assembly of this embodiment.

As shown in Figures 2-7, the connecting part 5 includes: a bracket 51, the end of the storage tube 12 bulges inward to form an assembly frame 124, and an assembly hole 125 is opened on the assembly frame 124 to pass through the assembly frame 124. One end of the bracket 51 is inserted into and passes through the assembly hole 125, and the end of the bracket 51 passing through the assembly hole 125 is connected to the rotating shaft 313.

Specifically, the upper cover 122 of the storage tube 12 bulges inward to form an assembly frame 124, and an assembly hole 125 is provided on the assembly frame 124 to penetrate the assembly frame 124. The assembly frame 124 is configured to be conical. The shape and structure of the assembly frame 124 are not limited thereto. According to different specific application scenarios, in some embodiments, the assembly frame 124 can be (not limited to): annular or prismatic.

In some embodiments, the bracket 51 and the assembly rack 124 are made of the same material, and the bracket 51 and the assembly rack 124 can be integrally manufactured. In some embodiments, the bracket 51 is a metal tube, and the bracket 51 and the assembly rack 124 are combined by injection molding. In some embodiments, the bracket 51 and the assembly rack 124 are connected by snap-fitting.

The connecting part 5 also includes: a first sleeve 54, a second sleeve 53 and a retaining spring 52. The bracket 51 is provided with a mounting hole 511 penetrating the bracket 51. The mounting hole 511 is raised to form a stop ring 512. The first sleeve 54 and the second sleeve 53 are respectively arranged at both ends of the stop ring 512. The retaining spring 52 is arranged in the mounting hole 511 and overlaps with the second sleeve 53. One end of the rotating shaft 313 passes through the first sleeve 54 and the second sleeve 53 and is connected to the retaining spring 52. One end of the rotating shaft 313 connected to the retaining spring 52 is provided with a slot 316 matched with the retaining spring 52. The first sleeve 54 and the second sleeve 53 are made of metal. The arrangement of the first sleeve 54 and the second sleeve 53 improves the rotation efficiency of the rotating shaft 313 of the motor assembly 31, and can also avoid the contact between the rotating shaft 313 and the mounting hole 511 and cause wear.

The magnetic ring 312 of the motor assembly 31 is sleeved at the position where the first sleeve 54 is provided on the bracket 51. Since the first sleeve 54 is made of metal, the physical strength of the bracket 51 can be increased. The magnetic ring 312 is sleeved at the position where the first sleeve 54 is provided on the bracket 51, and the connection stability between the magnetic ring 312 and the bracket 51 is stronger. The magnetic ring 312 and the bracket 51 are connected by interference fit, but the connection method is not limited thereto. According to different specific application scenarios, in some embodiments, the magnetic ring 312 can be connected to the bracket 51 by snapping or gluing.

Specifically, the first sleeve 54, the second sleeve 53 and the bracket 51 are connected by interference fit. However, the connection method is not limited thereto. Depending on the specific application scenario, in some embodiments, the first sleeve 54, the second sleeve 53 and the bracket 51 can be fixed by snapping or gluing.

In some embodiments, the first bushing 54 and the second bushing 53 can be replaced with bearings.

In some embodiments, the motor assembly 31 further includes: a motor housing 314, the motor housing 314 is sleeved on the magnetic ring 312, the connecting ring 323 is sleeved on the motor housing 314, and one end of the rotating shaft 313 connected to the fan blade assembly 32 passes through the motor housing 314. The motor assembly 31 further includes: a conical helical spring 315, the conical helical spring 315 is sleeved on the rotating shaft 313, one end of the conical helical spring 315 is connected to the motor housing 314, and the other end of the conical helical spring 315 is connected to the first sleeve 54. The setting of the conical helical spring 315 can enable the fan blade assembly 32 to have a certain buffer displacement space when it is impacted by an external force, and well protect the fan blade assembly 32. At the same time, it can also avoid the vibration generated when the fan blade assembly 32 rotates, and rigidly transmit it to the entire fan module, causing greater vibration, and can also reduce the wind noise of the fan blade assembly 32 rotating.

In some embodiments, the magnetic ring 312 is composed of a plurality of magnetic sheets.

In some embodiments, when the motor assembly 31 is not provided with a motor housing 314 , one end of the conical coil spring 315 can be directly connected to the hub 321 , and the other end can be connected to the first sleeve 54 .

The conical helical spring 315 is connected to the motor housing 314 or the wheel hub 321 by (not limited to): overlapping or gluing. The conical helical spring 315 is connected to the first sleeve 54 by (not limited to): overlapping, welding or gluing.

In some embodiments, a wiring hole 123 is provided on the upper cover 122 of the storage tube 12, and the wire 6 passes through the wiring hole 123 to connect with the coil 311. The wire 6 is directly extended into the storage cavity 121 through the wiring hole 123 to connect with the coil 311, which can avoid the wire 6 from being routed outside the storage tube 12, reduce the obstruction of the flow of air inside the fan module, and improve the air outlet efficiency.

In this embodiment, the fan module includes an air duct 2 and an air duct 1, and part of the structure of the fan assembly 3 is arranged in the air duct 1, and the other part extends into the air duct 2. This layout structure can make the fan module have higher space utilization, more compact structure, and more compact volume. At the same time, the air flow channel of the fan module composed of the air duct 2 and the air duct 1 can guide the air flow entering therein, so that the air flow can flow from the air inlet 21 to the air outlet 11 more efficiently. The part of the structure of the fan assembly 3 is arranged in the air duct 1, so that the part of the fan assembly 3 directly exposed is reduced, which also reduces the contact area between the fan assembly 3 and the air flow, reduces the obstruction to the air flow, and improves the air outlet efficiency.

Example 2

A blowing device includes the fan module in embodiment 1, wherein the fan module is a core module component for assembling the blowing device. The fan module is used for airflow in the blowing device.

It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

The fan module of the blowing device in this embodiment includes an air duct 2 and an air duct 1. Part of the structure of the fan assembly 3 is arranged in the air duct 1, and the other part extends into the air duct 2. This layout structure can make the fan module have higher space utilization, more compact structure, and more compact volume. At the same time, the air flow channel of the fan module composed of the air duct 2 and the air duct 1 can guide the air flow entering therein, so that the air flow can flow from the air inlet 21 to the air outlet 11 more efficiently. The part of the structure of the fan assembly 3 is arranged in the air duct 1, so that the part of the fan assembly 3 directly exposed is reduced, which also reduces the contact area between the fan assembly 3 and the air flow, reduces the obstruction to the air flow, and improves the air outlet efficiency.

Option 3 is shown in Figures 3-1 to 3-5.

Example 1

Please refer to Figure 3-1 and Figure 3-2. Figure 3-1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 3-2 is a schematic diagram of the exploded structure of the fan module of this embodiment.

As shown in Fig. 3-1 and Fig. 3-2, a fan module comprises: a housing 1, a connecting member 2, a fan motor 3, a fan blade 4 and a buffer member 5. The connecting member 2 is arranged in the housing 1; the fan motor 3 is arranged in the housing 1, and one end of the fan motor 3 is connected to the connecting member 2; the fan blade 4 is arranged in the housing 1, and the fan blade 4 is sleeved on the fan motor 3; and the buffer member 5 is arranged between the fan blade 4 and the connecting member 2.

In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

Please refer to FIG3-3 , which is a schematic diagram of the structure of the shell of this embodiment from a top view.

As shown in FIG3-3, in this embodiment, the housing 1 is provided with an air cavity 11 that runs through the upper and lower surfaces thereof, and the air cavity 11 is configured in a cylindrical shape. However, the shape of the air cavity 11 is not limited thereto, and in some embodiments, the shape of the air cavity 11 can be star-shaped, heart-shaped, runway-shaped, or polygonal, depending on the specific application scenario.

Please refer to FIG. 3-4 , which is a schematic diagram of the three-dimensional structure of the shell of this embodiment when viewed from a bottom perspective.

As shown in FIGS. 3-4 , the connecting member 2 includes: a connecting ring 21, a connecting column 23 and a plurality of connecting plates 22. The plurality of connecting plates 22 are arranged around the connecting ring 21, one end of each of the plurality of connecting plates 22 is connected to the inner surface of the housing 1, and the other end of each of the connecting plates 22 is connected to the connecting ring 21.

The connecting column 23 is arranged on the side of the connecting ring 21 facing the fan blades 4. The connecting column 23 includes: a connecting truncated cone 231 and a connecting cylinder 232, wherein the bottom surface of the connecting truncated cone 231 is arranged on the connecting ring 21, the top surface of the connecting truncated cone 231 is connected to the connecting cylinder 232, and the coil 32 is sleeved on the connecting cylinder 232.

The structure of the connecting column 23 can enable the connecting truncated cone 231 to play a limiting role, and play a stopping role for the fan assembly sleeved on the connecting cylinder 232, thereby improving the assembly efficiency of the coil 32.

In some embodiments, the connecting column 23 can also be configured as a prism or a circular column.

The arrangement of the connecting column 23 enables the fan motor 3 and the fan blades 4 to be suspended inside the housing 1 , so that the fan motor 3 and the fan blades 4 can rotate more smoothly inside the housing 1 .

The connection ring 21 and the plurality of connection plates 22 are arranged so that the connection ring 21 can be suspended inside the housing 1. At the same time, the gaps between the connection plates 22 can serve as air ducts for the air flow inside the housing 1, thereby constraining the air flow inside the housing 1.

The end of each connecting plate 22 facing the fan blade 4 is bent and extended toward the fan blade 4 to form an air guide plate 24 . The bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blade 4 .

The end of each connecting plate 22 facing the fan blade 4 is bent and extended to form an air guide plate 24. The bending direction of the air guide plate 24 is opposite to the rotation direction of the fan assembly. When the fan blade 4 rotates, the airflow will be driven to rotate in the same direction. At this time, the bending direction of the air guide plate 24 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 24. Since the directions are opposite, the angle between the airflow and the curved part of the air guide plate 24 is greater than 90 degrees. The airflow contacts the air guide plate 24 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 24. During the contact process at a larger angle, the air guide plate 24 has an obvious guiding effect on the airflow, with less energy loss, thereby greatly improving the air outlet efficiency.

In this embodiment, the number of the connecting plates 22 is 7. However, the number of the connecting plates 22 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the connecting plates 22 can be 2, 3, 4, 5, 6, 8 or more.

In this embodiment, the number of air guide plates 24 corresponding to the number of connecting plates 22 is also 7. However, the number of air guide plates 24 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of air guide plates 24 can be 2, 3, 4, 5, 6, 8 or more.

In some embodiments, the connecting plate 22 and the air guide plate 24 adopt a split structure, that is, the connecting plate 22 and the air guide plate 24 are independently arranged, and one end of the connection between the connecting plate 22 and the air guide plate 24 can be connected together or separated from each other.

The air guide plate 24 is disposed between the fan blades 4 and the housing 1 , and the air guide plate 24 is connected to the inner surface of the housing 1 , with a gap between the air guide plate 24 and the fan blades 4 .

The air guide plate 24 is arranged between the fan blades 4 and the housing 1, and there is a gap between the air guide plate 24 and the fan blades 4. The gap between the air guide plate 24 and the fan blades 4 is such that after the airflow contacts the air guide plate 24, part of the airflow flows toward the air outlet along the guidance of the air guide plate 24, and the other part of the airflow flows to the next air guide plate 24 through the gap between the air guide plate 24 and the fan blades 4. The gap between the air guide plate 24 and the fan blades 4 provides a channel for the air pressure balance between the air guide plates 24, thereby avoiding the problem that the air pressure on both sides of the air guide plate 24 is inconsistent due to the complete closure of the air guide plate 24, thereby affecting the air outlet efficiency of the fan module.

Please refer to FIG. 3-5 , which is a cross-sectional schematic diagram of the fan module of this embodiment.

As shown in Figures 3-5, the fan motor 3 includes: a coil 32, a magnetic ring 33 and a rotating shaft 31. A connecting column 23 is provided on the side of the connecting member 2 facing the fan blades 4. The coil 32 is sleeved on the connecting column 23, the magnetic ring 33 is sleeved on the coil 32, and the fan blades 4 are sleeved on the magnetic ring 33. One end of the rotating shaft 31 is connected to the fan blades 4, and the other end of the rotating shaft 31 is inserted into the connecting column 23. The buffer member 5 is arranged between the connecting column 23 and the fan blades 4.

In some embodiments, when the connecting column 23 includes: a connecting truncated cone 231 and a connecting cylinder 232, the coil 32 is sleeved on the connecting cylinder 232, and one end of the coil 32 abuts against the connecting truncated cone 231. The connecting truncated cone 231 can define the position of the coil 32, making it easy to assemble and position the coil 32.

The magnetic ring 33 is arranged inside the hub 41 of the fan blade 4, and the magnetic ring 33 and the hub 41 are connected by interference fit, and the inner ring of the magnetic ring 33 is sleeved on the coil 32 and connected to the coil 32 by magnetic coupling. The connection method of the magnetic ring 33, the fan blade 4 and the coil 32 can make the connection between the entire fan motor 3 and the fan blade 4 more compact, and can also save the outer shell structure of the fan motor 3, making the fan motor 3 more lightweight. The fan blade 4 is sleeved on the magnetic ring 33, so that the contact area between the fan blade 4 and the fan motor 3 is larger, and the torque during rotation is smaller. Therefore, the fan blade 4 can be more stable when rotating, the rotation speed is higher, and the air output of the fan module is larger.

In some embodiments, the fan motor 3 further includes a metal ring 34, which is sleeved on the magnetic ring 33, and the fan blades 4 are sleeved on the metal ring 34. The provision of the metal ring 34 can protect the magnetic ring 33 and prevent the magnetic ring 33 from being damaged during the assembly process.

The buffer member 5 is sleeved on the rotating shaft 31, and a connecting hole 25 is formed on the connecting column 23. The two ends of the connecting hole 25 are respectively provided with a first sleeve 26 and a second sleeve 27, and the rotating shaft 31 is inserted into and passes through the first sleeve 26 and the second sleeve 27. The provision of the first sleeve 26 and the second sleeve 27 can make the linear stability of the rotating shaft 31 better when rotating, thereby making the rotation of the fan blades 4 more stable and the air outlet efficiency higher.

A slot is provided at one end of the rotating shaft 31 passing through the second sleeve 27, and an annular retaining ring 35 is arranged in the slot. An opening is provided on the annular retaining ring 35 so that the annular retaining ring 35 can be removed. The diameter of the annular retaining ring is larger than the diameter of the inner ring of the second sleeve 27, so the annular retaining ring can prevent the rotating shaft 31 from falling off from the second sleeve 27 and the first sleeve 26.

In some embodiments, a sealing ring 36 is provided between the annular retaining ring 35 and the second sleeve 27 .

The buffer 5 is constructed in a tower shape, and the buffer 5 is sleeved on the rotating shaft 31. The buffer 5 is sleeved on the rotating shaft 31, which can prevent the buffer 5 from being displaced when the fan blade 4 rotates, thereby preventing the normal rotation of the fan blade 4.

The buffer 5 is constructed in a tower shape. After being compressed, the elastic force of the tower-shaped buffer 5 increases linearly, which can effectively buffer and reset the displacement generated during the rotation of the fan blade 4, making the rotation of the fan blade 4 more stable. The elastic force increases linearly, which can make the buffer force increase steadily when the fan blade 4 is squeezed by a large external force, thereby achieving a better buffering effect.

In some embodiments, the shape of the buffer 5 is not limited to a tower shape. Depending on the specific application scenario, the shape of the buffer 5 can be (but not limited to): annular, straight, arc-shaped, spherical, etc.

In some embodiments, the position of the buffer 5 is not limited to being sleeved on the rotating shaft 31 , and can be set on the fan blades 4 or on the connecting column 23 according to different specific application scenarios.

One end of the buffer 5 is fixedly connected to the connecting column 23, and the other end of the buffer 5 is overlapped with or separated from the fan blade 4. The buffer 5 is connected to the connecting column 23 to prevent the buffer 5 from contacting the fan blade 4 when the fan blade 4 is in normal working condition, thereby interfering with the normal rotation of the fan blade 4, and improving the rotation stability of the fan blade 4 and the air outlet efficiency of the fan module. The other end of the buffer 5 is overlapped with or separated from the fan blade 4. Specifically, when the fan blade 4 is forced to move in the direction of the connecting column 23, the fan blade 4 is overlapped with the buffer 5; when the fan blade 4 rotates normally, it is separated from the buffer 5 to ensure that the fan blade 4 is in the best rotation state. In this embodiment, the buffer 5 can be mounted on the rotating shaft 31, and can also be separated from the rotating shaft 31.

In this embodiment, the material of the buffer member 5 can be (but not limited to): a metal spring or an elastomer made of rubber material.

In this embodiment, a connector 2 for connecting a fan motor 3 is provided in the housing 1 of the fan module, a fan blade 4 is connected to the fan motor 3, and a buffer 5 is provided between the fan blade 4 and the connector 2. The buffer 5 can limit and buffer the displacement of the fan blade 4, and avoid contact between the fan blade 4 and other components in the housing 1 in a narrow space, thereby preventing the fan blade 42 from being worn or the rotation efficiency from being reduced. The rotation efficiency of the fan module is improved, and the service life of the fan module is extended.

In this embodiment, the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 defines the gap between the housing 1 and the maximum diameter of the fan blade 4. When the fan blade 4 rotates, it will generate centrifugal force on the airflow flowing through the fan blade 4. Under the action of the centrifugal force, the airflow will move laterally and collide with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 is limited to 1.01-1.15, which limits the gap between the fan blade 4 and the housing 1, reduces the stroke of the lateral airflow under the action of the centrifugal force, and limits the speed of the airflow when it contacts the inner side surface of the housing 1 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 and the maximum diameter of the fan blades 4 is limited to between 1.01 and 1.15, within this ratio range, the distance between the fan blades 4 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 4, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 4, thereby improving the air intake efficiency of the fan module. The improvement in the air intake efficiency improves the overall air outlet efficiency of the fan module.

It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

Example 2

A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

The fan module of the blowing device in this embodiment is provided with a connecting piece 2 for connecting a fan motor 3 in a housing 1 of the fan module, and a fan blade 4 is connected to the fan motor 3 and a buffer 5 is provided between the fan blade 4 and the connecting piece 2. The provision of the buffer 5 can limit and buffer the displacement of the fan blade 4, and avoid the fan blade 4 and other components in the housing 1 in a narrow space, thereby preventing the fan blade 4 from contacting with each other, thereby causing the fan blade 42 to be worn or the rotation efficiency to be reduced. The rotation efficiency of the fan module is improved, and the service life of the fan module is extended.

Scheme 4 is shown in Figures 4-1 to 4-6.

Example 1

Please refer to Figures 4-1 and 4-2. Figure 4-1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 4-2 is a schematic diagram of the exploded structure of the fan module of this embodiment.

As shown in Fig. 4-1 and Fig. 4-2, a fan module comprises: a housing 1, a fan motor 3 and a fan blade 4. The fan motor 3 is arranged in the housing 1; a first cavity 431 and a second cavity 432 are arranged inside the fan blade 4, the first cavity 431 and the second cavity 432 are connected to each other, the first cavity 431 is sleeved on the fan motor 3, a connecting sleeve 434 is arranged in the second cavity 432, and the rotating shaft 31 of the fan motor 3 passes through the first cavity 431 and is connected to the connecting sleeve 434.

In the above embodiment, the fan motor 3 and the fan blade 4 are arranged in the housing 1, and a cavity is opened inside the fan blade 4, namely a first cavity 431 and a second cavity 432, and the first cavity 431 and the second cavity 432 are connected to each other, wherein the first cavity 431 is sleeved on the fan motor 3, and a connecting sleeve 434 is arranged in the second cavity 432, and the connecting sleeve 434 is connected to the rotating shaft 31. Since the first cavity 431 of the fan blade 4 is sleeved on the fan motor 3, the fan motor 3 and the fan blade 4 can be constructed into a connected structure, which reduces the overall volume of the fan motor 3 and the fan blade 4, and further reduces the overall volume of the fan module. At the same time, since the first cavity 431 is sleeved on the fan motor 3 and the rotating shaft 31 is arranged inside the fan blades 4, the weight of the fan blades 4 is not concentrated on one end of the rotating shaft 31, and the center of mass of the rotating shaft 31 will not be offset, thereby reducing the probability of vibration of the rotating shaft 31 under high-speed rotation, thereby reducing the probability of abnormal shaking of the fan blades 4, improving the rotation stability of the fan blades 4, and improving the air outlet efficiency of the fan module.

In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

Please refer to FIG. 4-3 , which is a schematic diagram of the overall structure of the shell of this embodiment.

As shown in FIG4-3, in this embodiment, the housing 1 is provided with an air cavity 11 that runs through the upper and lower surfaces thereof, and the air cavity 11 is configured in a cylindrical shape. However, the shape of the air cavity 11 is not limited thereto, and in some embodiments, the shape of the air cavity 11 can be star-shaped, heart-shaped, runway-shaped, or polygonal, depending on the specific application scenario.

The fan motor 3 in this embodiment includes: a coil 32, a magnetic ring 33 and a rotating shaft 31. A connecting column 23 is provided on the side of the connecting member 2 facing the fan blades 4. The coil 32 is sleeved on the connecting column 23, the magnetic ring 33 is sleeved on the coil 32, and the fan blades 4 are sleeved on the magnetic ring 33. One end of the rotating shaft 31 is connected to the connecting shaft sleeve 434 of the fan blades 4, and the other end of the rotating shaft 31 is inserted into the connecting column 23. The buffer member 5 is arranged between the connecting column 23 and the fan blades 4.

The buffer 5 is constructed in a tower shape, and the buffer 5 is sleeved on the rotating shaft 31. The buffer 5 is sleeved on the rotating shaft 31, which can prevent the buffer 5 from being displaced when the fan blade 4 rotates, thereby preventing the normal rotation of the fan blade 4.

The buffer 5 is constructed in a tower shape. After being compressed, the elastic force of the buffer 5 increases linearly, which can effectively buffer and reset the displacement generated during the rotation of the fan blade 4, making the rotation of the fan blade 4 more stable. The elastic force increases linearly, which can make the buffer force increase steadily when the fan blade 4 is squeezed by a large external force, thereby achieving a better buffering effect.

In some embodiments, the shape of the buffer 5 is not limited to a tower shape. Depending on the specific application scenario, the shape of the buffer 5 can be (but not limited to): annular, straight, arc-shaped, spherical, etc.

In some embodiments, the fan motor 3 further includes a metal ring 34, which is sleeved on the magnetic ring 33, and the fan blades 4 are sleeved on the metal ring 34. The provision of the metal ring 34 can protect the magnetic ring 33 and prevent the magnetic ring 33 from being damaged during the assembly process.

In some embodiments, the fan motor 3 can be a motor with a housing 1. The connector 2 is used to fix the motor in the housing 1.

The connecting member 2 includes: a connecting ring 21, a connecting column 23 and a plurality of connecting plates 22. The plurality of connecting plates 22 are arranged around the connecting ring 21, one end of each of the plurality of connecting plates 22 is connected to the inner surface of the housing 1, and the other end of each of the connecting plates 22 is connected to the connecting ring 21.

The connecting column 23 is arranged on the side of the connecting ring 21 facing the fan blades 4. The connecting column 23 includes: a connecting truncated cone 231 and a connecting cylinder 232, wherein the bottom surface 412 of the connecting truncated cone 231 is arranged on the connecting ring 21, the top surface 411 of the connecting truncated cone 231 is connected to the connecting cylinder 232, and the coil 32 is sleeved on the connecting cylinder 232.

The structure of the connecting column 23 can enable the connecting truncated cone 231 to play a limiting role, and play a stopping role for the fan assembly sleeved on the connecting cylinder 232, thereby improving the assembly efficiency of the coil 32.

In some embodiments, the connecting column 23 can also be configured as a prism or a circular column.

The arrangement of the connecting column 23 enables the fan motor 3 and the fan blades 4 to be suspended inside the housing 1 , so that the fan motor 3 and the fan blades 4 can rotate more smoothly inside the housing 1 .

Please refer to FIG. 4-4 , which is a schematic structural diagram of the fan blade of this embodiment from a first viewing angle.

As shown in FIG. 4-4 , the fan blade 4 includes: a hub 41 and a plurality of blades 42 , wherein the plurality of blades 42 are arranged around the hub 41 , and a first cavity 431 and a second cavity 432 are arranged in the hub 41 .

Please refer to Figures 4-5 and 4-6. Figure 4-5 is a schematic diagram of the structure of the fan blade of this embodiment at a second viewing angle; Figure 4-6 is a schematic diagram of the structure of the fan blade of this embodiment at a third viewing angle.

As shown in Figures 4-5 and 4-6, the hub 41 includes: a top surface 411, a bottom surface 412 and a side 413, the cross-sectional area of the bottom surface 412 is larger than the cross-sectional area of the top surface 411, and there is a smooth transition between the top surface 411 and the side 413. That is, in this embodiment, the hub 41 is configured to be in the shape of a bullet head with a flat head. This shape of the hub 41 enables the airflow flowing through the blades 42 to flow along the arc surface formed by the smooth transition between the top surface 411 and the side 413, which has a good guiding effect on the airflow, improves the efficiency of the airflow flowing in the fan blades 4, and thus improves the air outlet efficiency of the fan module.

However, the shape of the hub 41 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 41 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

The top surface 411 of the hub 41 is a circular surface. However, the shape of the top surface 411 is not limited thereto. In some embodiments, depending on the specific application scenario,

In this embodiment, the number of blades 42 is 9. However, the number of blades 42 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of blades 42 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

The inner surface of the fan blade 4 is raised to form a limiting ring 433 . The limiting ring 433 is located between the first cavity 431 and the second cavity 432 , and the limiting ring 433 abuts against the fan motor 3 .

In this embodiment, the limiting ring 433 is arranged on the inner surface of the hub 41 , and the limiting ring 433 divides the internal cavity 43 of the hub 41 into a first cavity 431 and a second cavity 432 , and the first cavity 431 and the second cavity 432 are interconnected through the limiting ring 433 .

The limiting ring 433 abuts against the magnetic ring 33 of the fan motor 3. In some embodiments, when the magnetic ring 33 of the fan motor 3 is sleeved with a metal ring 34, the limiting ring 433 abuts against one end of the metal ring 34. The abutment between the limiting ring 433 and the magnetic ring 33 or the metal ring 34 enables the limiting ring 433 to limit the magnetic ring 33 or the metal ring 34, facilitates the assembly of the magnetic ring 33 or the metal ring 34, and can avoid the problem that the magnetic ring 33 or the metal ring 34 extends into the internal cavity 43 of the hub 41, causing the bottom surface 412 of the hub 41 to contact the connector 2.

A plurality of reinforcing ribs 435 are disposed in the second cavity 432 . The plurality of reinforcing ribs 435 are disposed around the connecting sleeve 434 , and one end of each of the plurality of reinforcing ribs 435 is connected to the connecting sleeve 434 , and the other end of each of the plurality of reinforcing ribs 435 is connected to the inner surface of the second cavity 432 .

The provision of the reinforcing ribs 435 can improve the physical strength of the connecting sleeve 434. At the same time, the provision of the reinforcing ribs 435 can disperse the force received by the fan blades 4 to the hub 41, thereby avoiding the single-point force on the connecting sleeve 434 and improving the rotation stability of the fan blades 4.

Each of the multiple blades 42 includes a first end 421 and a second end 422 opposite to the first end 421, and the length of the first end 421 is greater than the length of the second end 422. The first end 421 is located adjacent to the top surface 411 of the hub 41, and the second end 422 is located adjacent to the bottom surface 412 of the hub 41. In each blade 42, the first end 421 is used to push the airflow into the fan blade 4 when the fan blade 4 rotates. The longer length of the first end 421 is conducive to pushing the airflow. The second end 422 is located at the end of the airflow direction. The reduction in the length of the second end 422 is conducive to reducing the size of the space where the airflow flows, compressing the airflow, and increasing the initial kinetic energy of the airflow, thereby improving the air outlet efficiency of the fan module.

Each blade 42 is provided with a blade edge 423. The thickness of each blade 42 gradually increases from the first end 421 to the blade edge 423, and the thickness of each blade 42 gradually decreases from the blade edge 423 to the second end 422. The thickness of different parts of the blade 42 varies, so that each blade 42 is constructed into a structure that is thinner at both ends and thicker in the middle. This structure enhances the cutting ability of the two ends of the blade 42 on the airflow and reduces the air resistance at both ends of the blade 42. The increase in the thickness of the middle part can enhance the physical strength of the blade 42. At the same time, the increase in the thickness of the blade 42 reduces the space between two adjacent blades 42, which has a pressurizing effect on the airflow passing through.

In this embodiment, the ratio range of the inner diameter of the shell 1 and the maximum diameter of the fan blades 4 is 1.01-1.15. The ratio range of the inner diameter of the shell 1 and the maximum diameter of the fan blades 4 limits the gap between the shell 1 and the maximum diameter of the fan blades 4. When the fan blades 4 rotate, they will generate centrifugal force on the airflow passing through the fan blades 4. Under the action of centrifugal force, the airflow will move laterally and collide with the inner wall of the shell 1, generating turbulence, thereby affecting the airflow field in the shell 1, resulting in low air outlet efficiency of the fan module. Limiting the ratio range of the inner diameter of the shell 1 to the maximum diameter of the fan blades 4 to between 1.01-1.15 limits the gap between the fan blades 4 and the shell 1, reduces the stroke of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the shell 1 to a smaller priority range. Therefore, this ratio It can reduce the energy loss when the airflow collides with the shell 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio of the inner diameter of the shell 1 to the maximum diameter of the fan blade 4 is limited to 1.01-1.15, within this ratio range, the distance between the fan blade 4 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blade 4, prevent the cyclone generated by the return airflow from affecting the air intake of the fan blade 4, and improve the air intake efficiency of the fan module. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module.

In some embodiments, the length ratio of the first end 421 and the second end 422 is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 421 to the second end 422, and the direction of the first end 421 facing the second end 422 gradually decreases. This reduction process cooperates with the size change of the hub 31 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, since there is a gap between the fan blades 4 and the housing 1, when the airflow pressure entering the first end 421 and flowing out of the second end 422 is obviously too large, since it is not a completely closed space, the airflow will have a backflow phenomenon due to excessive pressure, and the backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio of the first end 421 and the second end 422 is limited to 1.4-1.9. Within this ratio range, the airflow pressure flowing through the fan blades 4 is adjusted within the optimal range, which minimizes the backflow problem caused by excessive pressure of the airflow. At the same time, within the range of this ratio, the first end 421 can most effectively intercept and utilize the return airflow gradually overflowing from the edge of the blade 42, and reduce the probability of the return airflow flowing out of the housing 1 to the greatest extent. The combination of the two functions can make the airflow entering the first end 421 and the airflow outflowing from the end of the airflow approach the optimal value of 1:1, which greatly improves the air outlet efficiency of the fan blade 4.

It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

Example 2

A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

The fan module of the blowing device in this embodiment sets the fan motor 3 and the fan blade 4 in the housing 1, and the fan blade 4 is provided with a cavity inside, namely a first cavity 431 and a second cavity 432, and the first cavity 431 and the second cavity 432 are connected to each other, wherein the first cavity 431 is sleeved on the fan motor 3, and a connecting sleeve 434 is provided in the second cavity 432, and the connecting sleeve 434 is connected to the rotating shaft 31. Since the first cavity 431 of the fan blade 4 is sleeved on the fan motor 3, the fan motor 3 and the fan blade 4 can be constructed into a connected structure, which reduces the overall volume of the fan motor 3 and the fan blade 4, and further reduces the overall volume of the fan module. At the same time, since the first cavity 431 is sleeved on the fan motor 3 and the rotating shaft 31 is arranged inside the fan blades 4, the weight of the fan blades 4 is not concentrated on one end of the rotating shaft 31, and the center of mass of the rotating shaft 31 will not be offset, thereby reducing the probability of vibration of the rotating shaft 31 under high-speed rotation, thereby reducing the probability of abnormal shaking of the fan blades 4, improving the rotation stability of the fan blades 4, and improving the air outlet efficiency of the fan module.

Scheme 5 is shown in Figures 5-1 to 5-6.

Example 1

Please refer to Figures 5-1 and 5-2. Figure 5-1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 5-2 is a schematic diagram of the exploded structure of the fan module of this embodiment.

As shown in Fig. 5-1 and Fig. 5-2, a fan module comprises: a housing 1, a connector 2, a fan motor 3 and a fan blade 4. The connector 2 is arranged in the housing 1, and the connector 2 and the housing 1 enclose a plurality of airflow channels, and a first bearing 35 is abutted or spaced at one end of the connection; the fan motor 3 is sleeved on the connector 2 and the first bearing 35, and one end of the bearing of the fan motor 3 passes through the first bearing 35 and is connected to the connector 2; the fan blade 4 is connected to the other end of the rotating shaft 31.

In the above embodiment, a connecting member 2 is provided in the housing 1, and a first bearing 35 is provided at the end of the connecting member 2 in contact with or at intervals, and the fan motor 3 is sleeved on the connecting member 2 and the first bearing 35. Since the first bearing 35 is made of metal, it has a higher physical strength and can provide stronger support for the fan motor 3. At the same time, the first bearing 35 has a higher support strength, which can avoid the problem of the connecting member 2 being damaged and broken due to excessive force when the fan motor 3 rotates at high speed, thereby improving the service life of the fan module. At the same time, the provision of the first bearing 35 shortens the length of the connecting member 2, and the shortened length shortens the torque of the connecting member 2 when it is subjected to force, so that it can withstand a greater force from the fan motor 3, making the rotation of the fan motor 3 more stable and the air outlet efficiency higher.

In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

In this embodiment, the housing 1 is provided with an air cavity 11 that runs through the upper and lower surfaces thereof, and the air cavity 11 is configured in a cylindrical shape. However, the shape of the air cavity 11 is not limited thereto, and in some embodiments, the shape of the air cavity 11 can be star-shaped, heart-shaped, racetrack-shaped, or polygonal, depending on the specific application scenario.

In some embodiments, a trumpet-shaped air guide cover or an air guide cover with a constricted opening is disposed in the housing 1 .

In some embodiments, the fan motor 3 includes: a coil 32 and a magnetic ring 33, the magnetic ring 33 is sleeved on the connecting member 2 and the first bearing 35, the fan motor 3 is sleeved on the magnetic ring 33, and the magnetic ring 33 is sleeved on the coil 32. In this embodiment, a receiving cavity is provided on the fan blade 4. The inner surface of the accommodating cavity is sleeved on the coil 32. When the fan motor 3 rotates, the coil 32 drives the magnetic ring 33 to rotate, and then the magnetic ring 33 drives the fan blades 4 to rotate. In this process, the rotating shaft 31 no longer provides driving force for the fan blades 4 like a traditional motor, but plays a role in stabilizing and fixing the fan blades 4. In this rotation mode, since the steering force area of the magnetic ring 33 acting on the fan blades 4 is larger and the inertia moment of the fan blades 4 is smaller, the fan blades 4 can rotate at a high speed and stably.

Please refer to FIG. 5-3 , which is a cross-sectional diagram of the fan module of this embodiment.

As shown in FIG. 5-3 , in some embodiments, the fan motor 3 includes: a coil 32, a magnetic ring 33 and a motor housing 34. The coil 32 is sleeved on the connecting member 2 and the first bearing 35, the magnetic ring 33 is sleeved on the coil 32, the motor housing 34 is sleeved on the magnetic ring 33, and the motor housing 34 is fixedly connected to the rotating shaft 31, so that the fan housing 1 drives the rotating shaft 31 to rotate. In this embodiment, the coil 32 drives the magnetic ring 33 to rotate, and the magnetic ring 33 drives the motor housing 34 to rotate synchronously when rotating, and then the motor housing 34 drives the rotating shaft 31 connected thereto to rotate. This connection mode and driving mode, because the steering force area of the magnetic ring 33 is larger, the magnetic coupling connection mode between the magnetic ring 33 and the coil 32 can make the magnetic ring 33 rotate faster and more stably, thereby making the fan motor 3 rotate faster and more stably. At the same time, due to the connection between the motor housing 34 and the rotating shaft 31, the rotational torque between the rotating shaft 31 and the fan blades 4 is smaller, and the rotational inertia resistance of the fan blades 4 is also smaller. When rotating at high speed, the fan blades 4 are not prone to jitter and resonance, making the rotation of the fan blades 4 more stable and the speed higher.

The coil 32 is respectively interference-fitted with the connector 2, the magnetic ring 33 is magnetically coupled to the coil 32, and the motor housing 34 is interference-fitted with the rotating shaft 31. During the rotation of the magnetic ring 33 and the coil 32, the magnetic ring 33 is in a suspended state for rotation, and is subjected to less physical friction than a traditional motor, so the speed of the fan motor 3 can be further increased.

In some embodiments, the connection method between the coil 32 and the connector 2 is not limited to interference fit. Depending on the specific application scenario, the connection method between the coil 32 and the connector 2 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

In some embodiments, the connection method between the motor housing 34 and the rotating shaft 31 is not limited to interference fit. Depending on the specific application scenario, the connection method between the motor housing 34 and the rotating shaft 31 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

The connecting member 2 includes: a connecting ring 22 and a plurality of connecting plates 21, wherein the plurality of connecting plates 21 are arranged around the connecting ring 22, one end of each of the plurality of connecting plates 21 is connected to the inner surface of the shell 1, and the other end of each of the connecting plates 21 is connected to the connecting ring 22, and two adjacent connecting plates 21 among the plurality of connecting plates 21 enclose each other to form an air duct.

The arrangement of the plurality of connection plates 21 enables the connection ring 22 to be suspended in the housing 1 , and every two connection plates 21 among the plurality of connection plates 21 enclose an air duct, allowing the airflow driven by the fan assembly to flow through the air duct.

In this embodiment, the number of the connecting plates 21 is 7. However, the number of the connecting plates 21 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the connecting plates 21 can be 2, 3, 4, 5, 6, 8 or more.

In some embodiments, the connecting member 2 is a plate disposed inside the housing 1 , the shape of the plate is the same as the shape of the internal cavity of the housing 1 , and a plurality of holes for airflow are opened on the plate.

The connector 2 and the housing 1 are manufactured by an integrated molding process. However, the manufacturing process of the connector 2 and the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 2 and the housing 1 can be processed and molded separately, and then assembled and connected by gluing, clamping, riveting or screwing.

Please refer to Figures 5-4 and 5-5. Figure 5-4 is a schematic diagram of the three-dimensional structure of the shell of this embodiment; Figure 5-5 is a schematic diagram of the structure of the connection between the shell and the rotating shaft of this embodiment.

As shown in FIGS. 5-4 and 5-5 , the connector 2 further includes a connecting column 23 . The connecting column 23 is connected to the side of the connecting ring 22 facing the fan motor 3 , the connecting column 23 is in contact with or spaced from the first bearing 35 , the bearing passes through the first bearing 35 and is connected to the connecting column 23 , and the fan motor 3 is sleeved on the connecting column 23 and the first bearing 35 .

The connecting column 23 is configured in a truncated cone shape, and the truncated cone structure can stop the coil 32, making it convenient to install and fix the coil 32. However, the shape of the connecting column 23 is not limited thereto. According to different specific application scenarios, in some embodiments, the connecting column 23 can be a stepped structure composed of two connected cylinders; or formed by a prism or cylindrical structure.

In some embodiments, the connector 2 only includes: a connecting column 23 and a plurality of connecting plates 21 , the plurality of connecting plates 21 are arranged around the connecting column 23 , and one end of the plurality of connecting plates 21 is connected to the inner surface of the shell 1 and the other end is connected to the connecting column 23 .

The connection column 23 and the connection ring 22 are manufactured by an integral casting process. However, the preparation method of the connection column 23 and the connection ring 22 is not limited thereto. In some embodiments, the connection column 23 and the connection ring 22 are separately manufactured and formed, and then connected by (but not limited to): screw connection, clamping, riveting, adhesive connection, etc.

In some embodiments, the end of each connecting plate 21 facing the fan motor 3 is bent and extended toward the fan motor 3 to form an air guide plate 24, and the bending direction of the air guide plate 24 is opposite to the rotation direction of the fan assembly.

Specifically, each of the multiple connecting plates 21 is formed with an air guide plate 24 at the end facing the fan motor 3, and the bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blades 4. In this embodiment, the bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blades 4, which means that the bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blades 4, and is not limited to the specific embodiment in which the bending direction of the air guide plate 24 is 180° to the rotation direction of the fan blades 4. In some embodiments, when the bending angle of the air guide plate 24 is an obtuse angle with the rotation direction of the fan blades 4, it is also within the opposite coverage defined in this embodiment.

The bending direction of the air guide plate 24 is opposite to the rotation direction of the fan blades 4. When the fan blades 4 rotate, the airflow will be driven to rotate in the same direction. At this time, the bending direction of the air guide plate 24 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 24. Since the directions are opposite, the angle between the airflow and the curved part of the air guide plate 24 is greater than 90 degrees. The airflow contacts the air guide plate 24 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 24. During the contact process at a larger angle, the air guide plate 24 has an obvious guiding effect on the airflow, with less energy loss, which greatly improves the air outlet efficiency.

The air guide plate 24 is disposed between the fan assembly and the housing 1 , and the air guide plate 24 is connected to the inner surface of the housing 1 , with a gap between the air guide plate 24 and the fan assembly.

Specifically, the air guide plate 24 is disposed between the fan motor 3 and the housing 1 , and a gap is provided between the air guide plate 24 and the fan motor 3 .

In some embodiments, the air guide plate 24 is disposed between the hub of the fan blade 4 and the housing 1 , and there is a gap between the air guide plate 24 and the hub.

The air guide plate 24 is arranged between the fan blades 4 and the housing 1, and there is a gap between the air guide plate 24 and the fan blades 4. The gap between the air guide plate 24 and the fan blades 4 is such that after the airflow contacts the air guide plate 24, part of the airflow flows toward the air outlet along the guidance of the air guide plate 24, and the other part of the airflow flows to the next air guide plate 24 through the gap between the air guide plate 24 and the fan blades 4. The gap between the air guide plate 24 and the fan blades 4 provides a channel for the air pressure balance between the air guide plates 24, thereby avoiding the problem that the air pressure on both sides of the air guide plate 24 is inconsistent due to the complete closure of the air guide plate 24, thereby affecting the air outlet efficiency of the fan module.

In some embodiments, the connecting ring 22 includes: a connecting outer ring 221 and a connecting inner ring 222, the connecting inner ring 222 is arranged inside the connecting outer ring 221, the connecting outer ring 221 is connected to a plurality of connecting plates 21, one end of the connecting column 23 is connected to the connecting inner ring 222, and the other end of the connecting column 23 extends out of the connecting outer ring 221 and is sleeved and connected to the fan motor 3.

The thickness of the connecting outer ring 221 is greater than the thickness of the connecting inner ring 222, so that when the connecting inner ring 222 is set in the connecting outer ring 221, there is still spare space in the connecting outer ring 221, and the spare space can be used to set the assembly base, thereby improving the space utilization of the fan module.

The connecting post 23 is provided with a connecting hole 25 that penetrates the connecting post 23, and the connecting hole 25 is communicated with the connecting inner ring 222. The second bearing 36 is arranged in the connecting inner ring 222 and the connecting hole 25, and the rotating shaft 31 passes through the connecting hole 25 and is connected to the second bearing 36. The rotating shaft 31 is inserted into and passes through the first bearing 35 and the second bearing 36, and a clamping groove 311 is provided at one end of the rotating shaft 31 that passes through the second bearing 36, and a clamping spring 37 is connected to the clamping groove 311.

The arrangement of the first bearing 35 and the second bearing 36 can make the rotation of the rotating shaft 31 smoother. At the same time, the arrangement of the two rotating shafts 31 makes the linear rotation of the rotating shaft 31 more stable, and can make the rotation speed of the fan motor 3 faster. The arrangement of the clamping groove 311 and the clamping spring 37 can prevent the rotating shaft 31 from falling off from the first bearing 35 and the second bearing 36, thereby enhancing the stability and reliability of the connection of the rotating shaft 31.

The end of the connecting outer ring 221 facing away from the fan motor 3 is snap-connected with a PCB circuit board 6. The PCB circuit board 6 is snap-connected and set on the connecting outer ring 221. The PCB circuit board 6 is set on the connecting outer ring 221, which can prevent the PCB circuit board 6 from leaking out of the fan module and hindering the airflow in the fan module. Therefore, the setting method of the PCB circuit board 6 reduces the wind resistance inside the fan module and improves the air outlet efficiency of the fan module. The snap connection between the PCB circuit board 6 and the connecting outer ring 221 facilitates the disassembly and replacement of the PCB circuit board 6, thereby improving the maintenance efficiency. At the same time, the PCB circuit board 6 can also serve as a dust cover above the fan motor 3 or the rotating shaft 31 and the second bearing 36 to prevent external dust from entering the above components and affecting the normal use of the above components.

Please refer to Figure 5-6, which is a schematic diagram of the connection structure between the shell and the PCB circuit board in this embodiment.

As shown in Figures 5-6, a clamping plate 221a and a support plate 221b are provided at one end of the connecting outer ring 221 facing away from the fan motor 3. The support plate 221b overlaps the PCB circuit board 6, and the clamping plate 221a is clamped and connected to the PCB circuit board 6. The support plate 221b and the clamping plate 221a are alternately arranged.

The supporting plates 221 b and the clamping plates 221 a are alternately arranged so that the supporting plates 221 b and the clamping plates 221 a have movable space, which facilitates the assembly of the PCB circuit board 6 .

In this embodiment, the number of support plates 221b is 3. However, the number of support plates 221b is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of support plates 221b can be (not limited to): 2, 4, 5 or more.

In this embodiment, the number of the clamping plates 221a is 3. However, the number of the clamping plates 221a is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the clamping plates 221a can be (not limited to): 2, 4, 5 or more.

In some embodiments, a claw 221c is provided on the clamping plate 221a, and the support plate 221b forms a support edge 221d by changing the thickness. The position height of the support edge 221d is lower than the position height of the claw 221c. The claw 221c and the support edge 221d form a clamping space, and the PCB circuit board 6 is arranged in the clamping space.

The annular clamping space formed by the clamping claw 221c and the supporting stop edge 221d can clamp the PCB circuit board 6 to prevent the PCB circuit board 6 from shaking or vibrating when the fan motor 3 rotates, thereby improving the stability of the fan module and reducing the noise of the fan module.

In some embodiments, the clamping device on the clamping plate 221a is not limited to the claw 221c. Depending on the specific application scenario, the clamping plate 221a can be provided with (but not limited to): circular, elliptical, and runway-shaped protrusions serving as the clamping device.

In some embodiments, the manufacturing device on the support plate 221b is not limited to the support edge 221d formed by thickness variation. Depending on the specific application scenario, the support plate 221b can be provided with (not limited to): circular, elliptical, and runway-shaped protrusions acting as support devices.

In this embodiment, the ratio of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 is in the range of 1.01-1.15. The ratio of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 defines the gap between the housing 1 and the maximum diameter of the fan blade 4. When the fan blade 4 rotates, it will generate centrifugal force on the airflow passing through the fan blade 4. Under the action of the centrifugal force, the airflow will move horizontally and collide with the inner wall of the housing 1, generating Turbulence is generated, which in turn affects the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 is limited to 1.01-1.15, which limits the gap between the fan blade 4 and the housing 1, reduces the stroke of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the housing 1 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blade 4 is limited to 1.01-1.15, within this ratio range, the distance between the fan blade 4 and the housing 1 is small, which can have an excellent interception effect on the backflow airflow in the fan blade 4, prevent the cyclone generated by the backflow airflow from affecting the air intake of the fan blade 4, and improve the air intake efficiency of the fan module. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module.

In some embodiments, a flexible sleeve 5 is sleeved on the housing 1, and an annular protrusion 51 and a dot-shaped protrusion 52 are alternately arranged on the outside of the flexible sleeve 5. The setting of the flexible sleeve 5 can increase the friction between the fan module and the external object or other matching structure, so that the connection stability of the fan module is stronger. At the same time, the setting of the flexible sleeve 5 can also effectively buffer the physical vibration generated when the fan module is working, so that the rotation of the fan module is more stable and the noise generated is smaller.

The flexible sleeve 5 is alternately provided with annular protrusions 51 and dot-shaped protrusions 52 on the outside. Specifically, in some embodiments, the annular protrusions 51 are provided at both ends of the flexible sleeve 5, and the dot-shaped protrusions 52 are provided between the two annular protrusions 51. Alternatively, the annular protrusions 51 are provided at both ends and the middle position of the flexible sleeve 5, and the dot-shaped protrusions 52 are provided between two adjacent annular protrusions 51. However, the alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 is not limited thereto, and the number of the annular protrusions 51 can be: 4, 5, 6 or more. The dot-shaped protrusions 52 can also be provided at one end or both ends of the flexible sleeve 5.

The alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 provides the annular protrusions 51 and the dot-shaped protrusions 52 with a larger deformation space, which facilitates the assembly of the fan module. At the same time, the enlargement of the deformation space can improve the buffering performance of the flexible sleeve 5.

It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

Example 2

A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, car fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

In the present embodiment, a connecting member 2 is provided in the housing 1 of the blowing device, and a first bearing 35 is provided at the end of the connecting member 2 in abutment with or at intervals, and the fan motor 3 is sleeved on the connecting member 2 and the first bearing 35. Since the first bearing 35 is made of metal, it has a higher physical strength and can provide stronger support for the fan motor 3. At the same time, the supporting strength of the first bearing 35 is higher, which can avoid the problem of the connecting member 2 being damaged and broken due to excessive force when the fan motor 3 rotates at high speed, thereby improving the service life of the fan module. At the same time, the provision of the first bearing 35 shortens the length of the connecting member 2, and the shortened length shortens the torque of the connecting member 2 when it is subjected to force, so that it bears a greater force from the fan motor 3, making the rotation of the fan motor 3 more stable and the air outlet efficiency higher.

Scheme 6 is shown in Figures 6-1 to 6-10.

Example 1

Please refer to Figure 6-1 and Figure 6-2. Figure 6-1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 6-2 is a schematic diagram of the exploded structure of the fan module of this embodiment.

As shown in Fig. 6-1 and Fig. 6-2, a fan module comprises: a housing 1, a connecting member 2, an assembly base 3 and a fan assembly 4. The connecting member 2 is arranged in the housing 1, and an air duct is opened on the connecting member 2; the assembly base 3 is connected to the connecting member 2; the fan assembly 4 is sleeved and connected to the assembly base 3, and the fan assembly 4 is connected to the assembly base 3 through a rotating shaft 414.

In the above embodiment, the connector 2 is arranged in the housing 1, the assembly base 3 is connected to the connector 2, the fan assembly 4 is connected to the assembly base 3, and the assembly base 3 and the fan assembly 4 are connected in two ways. First, a part of the structure of the fan assembly 4 is sleeved and installed on the assembly base 3; second, a part of the structure of the fan assembly 4 is also connected to the assembly base 3 through the rotating shaft 414. The multiplexed connection method between the fan assembly 4 and the assembly base 3 not only increases the connection stability between the fan assembly 4 and the assembly base 3, but also, this composite connection method can greatly reduce the space occupied by the fan assembly 4 in the housing 1, so that the volume of the fan module can be further reduced.

In this embodiment, the housing 1 is cylindrical, and a cylindrical air cavity 11 is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

Please refer to FIG. 6-3 , which is a cross-sectional view of the fan module of this embodiment.

As shown in FIG6-3, in this embodiment, the housing 1 is provided with an air cavity 11 that runs through the upper and lower surfaces thereof, and the air cavity 11 is configured in a cylindrical shape. However, the shape of the air cavity 11 is not limited thereto, and in some embodiments, the shape of the air cavity 11 can be star-shaped, heart-shaped, runway-shaped, or polygonal, depending on the specific application scenario.

Please refer to Figures 6-4 and 6-5. Figure 6-4 is a schematic diagram of the structure of the shell of this embodiment from a first viewing angle; Figure 6-5 is a schematic diagram of the structure of the shell of this embodiment from a second viewing angle.

As shown in Figures 6-4 and 6-5, the connecting member 2 includes: a connecting ring 21 and a plurality of connecting plates 22. The plurality of connecting plates 22 are arranged around the connecting ring 21. One end of each of the plurality of connecting plates 22 is connected to the inner surface of the shell 1, and the other end of each of the connecting plates 22 is connected to the connecting ring 21. Two adjacent connecting plates 22 among the plurality of connecting plates 22 enclose each other to form an air duct.

The arrangement of the plurality of connection plates 22 enables the connection ring 21 to be suspended in the housing 1 , and every two connection plates 22 among the plurality of connection plates 22 enclose an air duct, enabling the airflow driven by the fan assembly 4 to flow through the air duct.

In this embodiment, the number of the connecting plates 22 is 7. However, the number of the connecting plates 22 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of the connecting plates 22 can be 2, 3, 4, 5, 6, 8 or more.

In some embodiments, the connecting member 2 is a plate disposed inside the housing 1 , the shape of the plate is the same as the shape of the internal cavity of the housing 1 , and a plurality of holes for airflow are opened on the plate.

The connector 2 and the housing 1 are manufactured by an integrated molding process. However, the manufacturing process of the connector 2 and the housing 1 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 2 and the housing 1 can be processed and molded separately, and then assembled and connected by gluing, clamping, riveting or screwing.

In some embodiments, the connecting ring 21 includes: an outer connecting ring 211 and an inner connecting ring 212, the inner connecting ring 212 is arranged inside the outer connecting ring 211, the outer connecting ring 211 is connected to a plurality of connecting plates 22, the assembly base 3 is connected to the inner connecting ring 212, and the thickness of the outer connecting ring 211 is greater than the thickness of the inner connecting ring 212. It should be pointed out that the thickness in this embodiment refers to: the height in the vertical direction perpendicular to the horizontal direction.

The thickness of the connecting outer ring 211 is greater than the thickness of the connecting inner ring 212, so that when the connecting inner ring 212 is set in the connecting outer ring 211, there is still spare space in the connecting outer ring 211. The spare space can be used to set the assembly base 3, thereby improving the space utilization of the fan module.

The end of each of the plurality of connecting plates 22 facing the fan assembly 4 is bent and extended toward the fan assembly 4 to form an air guide plate 23 . The bending direction of the air guide plate 23 is opposite to the rotation direction of the fan assembly 4 .

Specifically, each of the plurality of connecting plates 22 is formed with an air guide plate 23 at the end facing the fan blade 42 in the fan assembly 4, and the bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blade 42. In this embodiment, the bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blade 42, which means that the bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blade 42, and is not limited to the specific embodiment in which the bending direction of the air guide plate 23 is 180° to the rotation direction of the fan blade 42. In some embodiments, when the bending angle of the air guide plate 23 is an obtuse angle to the rotation direction of the fan blade 42, it is also within the opposite coverage defined in this embodiment.

The bending direction of the air guide plate 23 is opposite to the rotation direction of the fan blades 42. When the fan blades 42 rotate, the airflow will be driven to rotate in the same direction. At this time, the bending direction of the air guide plate 23 is opposite to the rotation direction of the airflow. When the airflow rotates, it contacts and collides with the curved part of the air guide plate 23. Since the directions are opposite, the angle between the airflow and the curved part of the air guide plate 23 is greater than 90 degrees. The airflow contacts the air guide plate 23 at a larger angle, which can reduce the kinetic energy loss of the airflow contacting the air guide plate 23. During the contact process at a larger angle, the air guide plate 23 has an obvious guiding effect on the airflow, with less energy loss, which greatly improves the air outlet efficiency.

In some embodiments, the air guide plate 23 is disposed between the fan assembly 4 and the housing 1 , and the air guide plate 23 is connected to the inner surface of the housing 1 , with a gap between the air guide plate 23 and the fan assembly 4 .

Specifically, the air guide plate 23 is disposed between the fan motor 41 and the housing 1 , and a gap is provided between the air guide plate 23 and the fan motor 41 .

In some embodiments, the air guide plate 23 is disposed between the hub 421 of the fan blade 42 and the housing 1 , and a gap is provided between the air guide plate 23 and the hub 421 .

The air guide plate 23 is arranged between the fan blades 42 and the housing 1, and there is a gap between the air guide plate 23 and the fan blades 42. The gap between the air guide plate 23 and the fan blades 42 is such that after the airflow contacts the air guide plate 23, part of the airflow flows toward the air outlet along the guidance of the air guide plate 23, and the other part of the airflow flows to the next air guide plate 23 through the gap between the air guide plate 23 and the fan blades 42. The gap between the air guide plate 23 and the fan blades 42 provides a channel for the air pressure balance between the air guide plates 23, thereby avoiding the problem that the air pressure on both sides of the air guide plate 23 is inconsistent due to the complete closure of the air guide plate 23, thereby affecting the air outlet efficiency of the fan module.

The assembly base 3 is detachably connected to the connecting member 2 , and the assembly base 3 is made of metal.

The connector 2 is provided with a plurality of first fixing holes 215, and the assembly base 3 is correspondingly provided with a plurality of second fixing holes 311, and the plurality of first fixing holes 215 and the plurality of second fixing holes 311 are connected by screws. The assembly base 3 can be disassembled by screw connection, and the assembly base 3 can be conveniently replaced and repaired.

However, the detachable connection between the connector 2 and the assembly base 3 is not limited to screw connection. According to different specific application scenarios, in some embodiments, the connector 2 and the assembly base 3 can also be connected by a buckle or lock connection.

A positioning groove 214 is formed on the connecting member 2 , and one end of the assembly base 3 connected to the connecting member 2 is arranged in the positioning groove 214 .

The positioning groove 214 is provided on the connecting inner ring 212 of the connecting member 2, and the setting of the positioning groove 214 enables the base 31 in the assembly base 3 to be embedded in the positioning groove 214. This method facilitates the positioning and alignment of the first fixing hole 215 and the second fixing hole 311, and optimizes the assembly process. At the same time, since the assembly base 3 needs to withstand the torque generated by the fan assembly 4 when the fan assembly 4 rotates, and the magnitude of the torque is proportional to the rotation speed of the fan assembly 4. Therefore, when the generated torque is borne by the screw, the strength requirements of the screw are relatively high, and at the same time, it will affect the service life of the screw. The setting of the positioning groove 214 can deflect and stop the assembly base 3 through the positioning groove 214, which is equivalent to sharing a part of the torque by the positioning groove 214, greatly reducing the loss of the screw and extending the service life of the fan module.

Specifically, the positioning groove 214 is configured as a rounded triangle, and the shape of the base 31 of the corresponding assembly base 3 is also configured as a rounded triangle that matches the positioning groove 214, and the edges of the two adjacent rounded corners of the positioning groove 214 are in an inner arc shape, and the edges of the two adjacent rounded corners of the corresponding assembly base 3 are also configured as an inner arc shape. The inner arc structure makes the edge of the positioning groove 214 that contacts the assembly base 3 in an arc shape. When the fan assembly 4 rotates, the force of the assembly base 3 acting on the positioning groove 214 is decomposed in different directions of the arc edge, rather than concentrated in the same direction, which further reduces the force strength of the edge of the positioning groove 214 and improves the service life of the fan assembly 4.

In some embodiments, the shape of the positioning groove 214 and the corresponding shape of the assembly base 3 are not limited thereto. Depending on the specific application scenario, the shape of the positioning groove 214 can be (but not limited to): a running field shape, a polygon, an ellipse, etc., which can have a limiting effect on the embedded objects of the same shape. Similarly, according to the shape change of the positioning groove 214, the shape of the base 31 of the assembly base 3 can also change accordingly.

In this embodiment, the number of the first fixing holes 215 is 3, and the corresponding number of the second fixing holes 311 can also be 3. The first fixing holes 215 are respectively arranged at the rounded corners of the rounded triangle, and the second fixing holes 311 are respectively arranged at the rounded corners of the rounded triangle of the base 31. However, the number of the first fixing holes 215 and the number of the second fixing holes 311 are not limited thereto. According to different specific application scenarios, in some embodiments, the number of the first fixing holes 215 and the number of the second fixing holes 311 are respectively (but not limited to): 2, 4, 5 or more.

In this embodiment, the assembly base 3 is made of metal, and the shell 1 and the connecting member 2 are made of plastic. The use of metal material can make the assembly base 3 have higher physical strength and can be suitable for high-speed rotation of the fan assembly 4.

Specifically, the assembly base 3 is made of aluminum alloy material. However, the material of the assembly base 3 is not limited thereto, and according to different specific application scenarios, in some embodiments, the material of the assembly base 3 can be (but not limited to): iron, aluminum, copper and other conventional metals, and can also be made of iron or copper alloy materials.

In some embodiments, the mounting base 3 and the housing 1 can be made of the same plastic material.

The fan assembly 4 includes: a fan motor 41 and fan blades 42 . The fan motor 41 is sleeved and connected to the assembly base 3 , and the fan motor 41 is connected to the assembly base 3 via a rotating shaft 414 , and the fan blades 42 are connected to the assembly base 3 via a rotating shaft 414 .

In the fan assembly 4, the fan motor 41 is connected to the assembly base 3 and the rotating shaft 414 respectively. The two connection methods can make the fan motor 41 suspended in the shell 1. At the same time, the sleeve installation can make the space occupied by the fan motor 41 and the assembly base 3 smaller.

The fan motor 41 includes: a coil 411, a magnetic ring 412 and a motor housing 413. The coil 411 is sleeved on the assembly base 3, the magnetic ring 412 is sleeved on the coil 411, the motor housing 413 is sleeved on the magnetic ring 412, and the motor housing 413 is fixedly connected to the rotating shaft 414, so that the fan housing 1 drives the rotating shaft 414 to rotate.

In this embodiment, when the coil 411 is energized, the driving magnetic ring 412 rotates, and then the magnetic ring 412 drives the motor housing 413 to rotate, and finally the motor housing 413 drives the rotating shaft 414 to rotate. This motor driving method enables the fan motor 41 to be sleeved on the assembly base 3. At the same time, since the force-bearing area of the magnetic ring 412 is larger than that of the driven motor, the fan motor 41 rotates faster.

The coil 411 is interference fit with the assembly base 3, the magnetic ring 412 is magnetically coupled with the coil 411, and the motor housing 413 is interference fit with the rotating shaft 414. During the rotation of the magnetic ring 412 and the coil 411, the magnetic ring 412 is suspended and rotates, which is less physically frictional than the traditional motor, thus further increasing the speed of the fan motor 41.

In some embodiments, the connection method between the coil 411 and the assembly base 3 is not limited to interference fit. Depending on the specific application scenario, the connection method between the coil 411 and the assembly base 3 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

In some embodiments, the connection method between the motor housing 413 and the rotating shaft 414 is not limited to interference fit. Depending on the specific application scenario, the connection method between the motor housing 413 and the rotating shaft 414 can also be (not limited to): gluing, welding, riveting, screw connection and other fixing methods.

Please refer to FIG. 6-6 , which is a schematic diagram of the structure of the motor housing of this embodiment.

As shown in FIG. 6-6, in some embodiments, a limit stop edge 417 is provided inside the motor housing 413, and the limit stop edge 417 abuts against one end of the magnetic ring 412. The limit stop edge 417 is provided inside the motor housing 413, so that the magnetic ring 412 can be quickly assembled and limited, and the position of the motor housing 413 in the housing 1 is prevented from changing due to inconsistent assembly of the magnetic ring 412, thereby causing poor rotation stability of the fan module and easy friction damage.

The limit stop edge 417 on the motor housing 413 is formed due to the thickness variation of the side wall of the motor housing 413. The side wall thickness of the motor housing 413 adjacent to the fan blade 42 is larger, and the side wall thickness of the motor housing 413 adjacent to the connector 2 is smaller. The thickness variation of the side wall of the motor housing 413 forms the limit stop edge 417 inside the motor housing 413.

In some embodiments, the limit stop edge 417 inside the motor housing 413 can be a limit stop edge 417 formed by a protrusion on the inner surface of the motor housing 413 .

The fan blades 42 include: a hub 421 and a plurality of blades 422 . The plurality of blades 422 are arranged around the hub 421 , and the hub 421 is connected to the rotating shaft 414 .

Please refer to Figures 6-7 and 6-8. Figure 6-7 is a schematic diagram of the structure of the fan blades of this embodiment at a first viewing angle; Figure 6-8 is a schematic diagram of the structure of the fan blades of this embodiment at a second viewing angle.

As shown in FIGS. 6-7 and 6-8 , in this embodiment, the number of blades 422 is 9. However, the number of blades 422 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of blades 422 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

The hub 421 includes: a top surface 421a, a bottom surface 421c and a side 421b, the cross-sectional area of the bottom surface 421c is larger than the cross-sectional area of the top surface 421a, and the top surface 421a and the side 421b have a smooth transition. That is, in this embodiment, the hub 421 is configured to be in the shape of a bullet head with a flat head. This shape of the hub 421 enables the airflow flowing through the blades 422 to flow along the arc surface formed by the smooth transition between the top surface 421a and the side 421b, which has a good guiding effect on the airflow to form a wall attachment effect, thereby improving the efficiency of the airflow flowing in the fan blades 42, and thus improving the air outlet efficiency of the fan module.

However, the shape of the hub 421 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 421 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

The top surface 421a of the hub 421 is a circular surface. However, the shape of the top surface 421a is not limited thereto, and according to different specific application scenarios, in some embodiments, the top surface 421a of the hub 421 can also be conical, polygonal, elliptical or other shapes.

Each of the plurality of blades 422 includes a first end 422a and a second end 422b opposite to the first end 422a, and the length of the first end 422a is greater than the length of the second end 422b. The first end 422a is located adjacent to the top surface 421a of the hub 421, and the second end 422b is located adjacent to the bottom surface 421c of the hub 421. In each blade 422, the first end 422a is used to push the airflow into the fan blade 42 when the fan blade 42 rotates. The longer length of the first end 422a is conducive to pushing the airflow. The second end 422b is located at the end of the airflow direction. The reduction in the length of the second end 422b is conducive to reducing the size of the space where the airflow flows, compressing the airflow, and increasing the initial kinetic energy of the airflow, thereby improving the air outlet efficiency of the fan module.

Each blade 422 is provided with a blade edge 422c. The thickness of each blade 422 gradually increases from the first end 422a to the blade edge 422c, and the thickness of each blade 422 gradually decreases from the blade edge 422c to the second end 422b. The thickness of different parts of the blade 422 varies, so that each blade 422 is constructed into a structure that is thinner at both ends and thicker in the middle. This structure enhances the cutting ability of the two ends of the blade 422 on the airflow and reduces the air resistance at both ends of the blade 422. The increase in the thickness of the middle part can enhance the physical strength of the blade 422. At the same time, the increase in the thickness of the blade 422 reduces the space between two adjacent blades 422, which has a pressurizing effect on the airflow passing through.

Please refer to Figures 6-9 and 6-10. Figure 6-9 is a schematic diagram of the structure of the assembly base of this embodiment from a first viewing angle; Figure 6-10 is a schematic diagram of the structure of the assembly base of this embodiment from a second viewing angle.

As shown in FIGS. 6-9 and 6-10 , the assembly base 3 includes: a base 31 and a connecting column 32 , the base 31 is connected to the connecting member 2 , the connecting column 32 is connected to the base 31 , and the fan assembly 4 is sleeved and connected to the connecting column 32 .

The base 31 is configured in the shape of a rounded triangle, and the two adjacent rounded edges of the base 31 are also configured in an inner arc shape. With the inner arc shape, when the fan assembly 4 rotates, the force of the base 31 acting on the positioning groove 214 is decomposed in different directions of the arc edge, rather than concentrated in the same direction, further reducing the force strength of the edge of the positioning groove 214 and improving the service life of the fan assembly 4.

In some embodiments, the shape of the base 31 is not limited thereto. Depending on the specific application scenario, the shape of the base 31 can be (but not limited to): a running field shape, a polygonal shape, an elliptical shape, etc.

The connecting column 32 includes: a first column 321 and a second column 322 . The diameter of the first column 321 is greater than the diameter of the second column 322 . The first column 321 is connected to the base 31 . The second column 322 is connected to the first column 321 . The fan assembly 4 is sleeved and connected to the second column 322 .

The diameter of the first column 321 is greater than the diameter of the second body, so that the first column 321 and the second column 322 form a stepped structure. The first column 321 can serve as a stopper for the fan motor 41 or the PCB circuit board, facilitating the assembly of the fan motor 41 or the PCB circuit board.

In some embodiments, the shape of the connecting column 32 is not limited thereto. Depending on the specific application scenario, the connecting column 32 can be (but not limited to): a straight column, a prismatic column, or a composite structure consisting of a frustum and a straight column.

A connecting hole 33 is provided on the connecting column 32, and a first bearing 34 and a second bearing 35 are respectively provided at both ends of the connecting hole 33. The first bearing 34 and the second bearing 35 are inserted and passed through the first bearing 34 and the second bearing 35. A groove 414a is provided on one end of the rotating shaft 414 passing through the second bearing 35, and a retaining spring 415 is connected to the groove 414a.

The arrangement of the first bearing 34 and the second bearing 35 can make the rotating shaft 414 rotate more smoothly. At the same time, the arrangement of the two rotating shafts 414 makes the linear rotation of the rotating shaft 414 more stable, and can make the rotation speed of the fan motor 41 faster. The arrangement of the slot 414a and the retaining spring 415 can prevent the rotating shaft 414 from falling off from the first bearing 34 and the second bearing 35, thereby enhancing the stability and reliability of the connection of the rotating shaft 414.

The base 31 includes: a first protrusion 312 , a second protrusion 313 and a third protrusion 314 , wherein inner arc notches 315 are formed between the first protrusion 312 , the second protrusion 313 and the third protrusion 314 , and an outer arc piece 316 is provided between the second protrusion 313 and the third protrusion 314 .

The second fixing holes 311 are respectively arranged on the first protrusion 312, the second protrusion 313 and the third protrusion 314. The thickness of the outer arc piece 316 is less than the thickness of the base 31 body, and the second wiring hole 317 is provided on the outer arc piece 316. The structure of the inner arc notch 315 makes the edge of the positioning groove 214 in contact with the base 31 arc-shaped. When the fan assembly 4 rotates, the force of the base 31 acting on the positioning groove 214 is decomposed in different directions of the arc edge, rather than concentrated in the same direction, which further reduces the force strength of the edge of the positioning groove 214 and improves the service life of the fan assembly 4.

In some embodiments, a connecting platform 416 is provided at the position where the fan assembly 4 is connected to the rotating shaft 414. The rotating shaft 414 passes through the connecting platform 416 and is interference fit with the connecting platform 416. The end of the connecting platform 416 facing the first bearing 34 abuts against the first inner ring 341 of the first bearing 34.

Specifically, at the position where the motor housing 413 of the fan assembly 4 is connected to the rotating shaft 414, a protrusion extends in the direction of the connecting column 32 to form a connecting platform 416. The setting of the connecting platform 416 can increase the contact area between the motor housing 413 and the rotating shaft 414, enhance the connection strength between the motor housing 413 and the rotating shaft 414, and effectively prevent the problem of excessive local force, unstable connection, and short service life due to the small contact area between the motor housing 413 and the rotating shaft 414.

In some embodiments, the connection method between the connecting platform 416 and the rotating shaft 414 is not limited to interference fit. Depending on the specific application scenario, the connection method between the connecting platform 416 and the rotating shaft 414 can also be (but not limited to): gluing, welding, riveting, screw connection and other fixing methods.

The connecting platform 416 is in contact with the first inner ring 341 of the first bearing 34. When the motor housing 413 drives the rotating shaft 414 to rotate, in addition to the rotating shaft 414 driving the first inner ring 341 to rotate, the connecting platform 416 can also provide driving force for the first inner ring 341. This effectively avoids the problem that the rotating shaft 414 and the first inner ring 341 rotate relative to each other or slip due to long-term use, resulting in the first inner ring 341 and the rotating shaft 414 rotating asynchronously, thereby reducing the rotation efficiency of the rotating shaft 414. At the same time, when the motor housing 413 rotates, it will drive the first inner ring 341 of the first bearing 34 to rotate, and the first inner ring 341 can synchronously drive the rotating shaft 414 to rotate. In fact, through reasonable design, the force-bearing length of the rotating shaft 414 is extended, the rotation torque of the rotating shaft 414 is shortened, the force strength per unit area of the rotating shaft 414 is reduced, and its service life is extended. At the same time, the rotating shaft 414 can be made to rotate more stably, reducing the vibration and noise of the fan module.

In some embodiments, a sleeve 36 is disposed between the second bearing 35 and the retaining spring 415 . The sleeve 36 is sleeved on the rotating shaft 414 , and one end of the sleeve 36 facing the second rotating shaft 414 abuts against the second inner ring 351 of the second bearing 35 .

The arrangement of the sleeve 36 can prevent the rotating shaft 414 from slipping with the first bearing 34 and the second bearing 35, which would cause the retaining spring 415 to contact the second bearing 35 and cause friction damage. The end of the sleeve 36 facing the second bearing 35 abuts against the second inner ring 351, so that the sleeve 36 can rotate synchronously with the rotating shaft 414 and the second inner ring 351, thereby preventing the sleeve 36 from causing friction and collision damage with the rotating shaft 414 and the second bearing 35 due to lack of driving force.

In some embodiments, one end of the sleeve 36 abuts against the retaining spring 415 , and the other end abuts against the second inner ring 351 of the second bearing 35 .

The shaft sleeve 36 is made of alloy material or metal material. However, the material of the shaft sleeve 36 is not limited thereto, and according to different specific application scenarios, in some embodiments, the shaft sleeve 36 can be made of plastic or rubber material.

In some embodiments, one end of the rotating shaft 414 connected to the retaining spring 415 is located inside the connecting inner ring 212 to prevent the protruding end of the rotating shaft 414 from causing friction damage with other components.

In some embodiments, a PCB circuit board is provided between the base 31 and the fan assembly 4, and the PCB circuit board is sleeved on the connecting column 32. The PCB circuit board is used to control functions such as starting, stopping, and speed change of the fan motor 41. The PCB circuit board is provided between the base 31 and the fan assembly 4, and sleeved on the connecting column 32, which can save the internal space of the fan module and improve the space utilization rate inside the fan module. At the same time, the distance between the PCB circuit board and the fan motor 41 is shortened, and the length of the wire connecting the two is reduced, which saves consumables.

The PCB circuit board is configured as a ring as a whole. However, the shape of the PCB circuit board is not limited thereto, and according to different specific application scenarios, in some embodiments, the shape of the PCB circuit board can be (not limited to): polygonal, elliptical or racetrack-shaped.

The PCB circuit board is connected to the connecting column 32 by means of interference fit. However, the fixing method of the PCB circuit board is not limited thereto. According to different specific application scenarios, in some embodiments, the PCB circuit board is also fixed to the coil 411 by screws.

In some embodiments, a first wiring hole 213 is provided on the connector 2, a second wiring hole 317 is provided at the base 31 corresponding to the first wiring hole 213, and the thickness of the base 31 at the position where the second wiring hole 317 is provided is smaller than the thickness at other positions of the base 31.

In order to facilitate wiring and prevent the wires connected to the PCB circuit board from leaking out, a first wiring hole 213 is provided on the connector 2, and a second wiring hole 317 is provided on the base 31. The provision of the first wiring hole 213 and the second wiring hole 317 allows the wires to be routed in a manner that does not leak out, thereby improving the smoothness of the airflow inside the fan module. At the same time, the thickness of the base 31 at the position where the second wiring hole 317 is provided is less than the thickness at other positions of the base 31, which can reduce the overall weight of the base 31 and make the fan module more portable. The design of the thickness variation cooperates with the design of the positioning groove 214, so that the side of the base 31 facing the fan motor 41 is smoother and neater.

In some embodiments, a flexible sleeve 5 is sleeved on the housing 1, and an annular protrusion 51 and a dot-shaped protrusion 52 are alternately arranged on the outside of the flexible sleeve 5. The setting of the flexible sleeve 5 can increase the friction between the fan module and the external object or other matching structure, so that the connection stability of the fan module is stronger. At the same time, the setting of the flexible sleeve 5 can also effectively buffer the physical vibration generated when the fan module is working, so that the rotation of the fan module is more stable and the noise generated is smaller.

The flexible sleeve 5 is alternately provided with annular protrusions 51 and dot-shaped protrusions 52 on the outside. Specifically, in some embodiments, the annular protrusions 51 are provided at both ends of the flexible sleeve 5, and the dot-shaped protrusions 52 are provided between the two annular protrusions 51. Alternatively, the annular protrusions 51 are provided at both ends and the middle position of the flexible sleeve 5, and the dot-shaped protrusions 52 are provided between two adjacent annular protrusions 51. However, the alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 is not limited thereto, and the number of the annular protrusions 51 can be: 4, 5, 6 or more. The dot-shaped protrusions 52 can also be provided at one end or both ends of the flexible sleeve 5.

The alternating arrangement of the annular protrusions 51 and the dot-shaped protrusions 52 provides the annular protrusions 51 and the dot-shaped protrusions 52 with a larger deformation space, which facilitates the assembly of the fan module. At the same time, the enlargement of the deformation space can improve the buffering performance of the flexible sleeve 5.

The ratio of the inner diameter of the housing 1 to the maximum diameter of the fan blade 42 is in the range of 1.01-1.15. The ratio of the inner diameter of the housing 1 to the maximum diameter of the fan blade 42 defines the gap between the housing 1 and the maximum diameter of the fan blade 42. When the fan blade 42 rotates, it will generate centrifugal force on the airflow passing through the fan blade 42. Under the action of the centrifugal force, the airflow will move laterally and collide with the inner wall of the housing 1, generating turbulence. This further affects the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 is limited to between 1.01-1.15, which limits the gap between the fan blades 42 and the housing 1, reduces the stroke of the lateral airflow under the action of centrifugal force, and limits the speed of the airflow when it contacts the inner edge of the housing 1 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 42 is limited to between 1.01-1.15, within this ratio range, the distance between the fan blades 42 and the housing 1 is small, which can have an excellent interception effect on the backflow airflow in the fan blades 42, prevent the cyclone generated by the backflow airflow from affecting the air intake of the fan blades 42, and improve the air intake efficiency of the fan module. The improvement of the air intake efficiency improves the overall air outlet efficiency of the fan module.

In some embodiments, the length ratio of the first end 422a and the second end 422b is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 422a to the second end 422b, and the direction of the first end 422a facing the second end 422b gradually decreases. This reduction process cooperates with the size change of the hub 421 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, since there is a gap between the fan blades 42 and the housing 1, when the pressure of the airflow entering the first end 422a and flowing out of the second end 422b is obviously too large, since it is not a completely closed space, the airflow will have a backflow phenomenon due to excessive pressure, and the backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio range of the first end 422a and the second end 422b is limited to 1.4-1.9. Within this ratio range, the airflow pressure flowing through the fan blade 42 is adjusted within the optimal range, which minimizes the backflow problem caused by excessive pressure. At the same time, within the range of this ratio, the first end 422a can most effectively intercept and utilize the return airflow gradually overflowing from the edge of the blade 422, and minimize the probability of the return airflow flowing out of the housing 1. The combination of the two effects can make the airflow entering the first end 422a and the airflow outflowing from the end of the airflow approach the optimal value of 1:1. The air outlet efficiency of the fan blade 42 is greatly improved.

It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

Example 2

A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

The blowing device in this embodiment sets the connecting member 2 in the housing 1, the assembly base 3 is connected to the connecting member 2, the fan assembly 4 is connected to the assembly base 3, and the assembly base 3 and the fan assembly 4 are connected in two ways. First, part of the structure of the fan assembly 4 is sleeved and installed on the assembly base 3; second, part of the structure of the fan assembly 4 is also connected to the assembly base 3 through the rotating shaft 414. The multiplexed connection method between the fan assembly 4 and the assembly base 3 not only increases the connection stability between the fan assembly 4 and the assembly base 3, but also, this composite connection method can greatly reduce the space occupied by the fan assembly 4 in the housing 1, so that the volume of the fan module can be further reduced.

Scheme 7 is shown in Figures 7-1 to 7-6.

Example 1

Please refer to Figure 7-1 and Figure 7-2. Figure 7-1 is a schematic diagram of the overall structure of the fan module of this embodiment; Figure 7-2 is a schematic diagram of the exploded structure of the fan module of this embodiment.

As shown in Fig. 7-1 and Fig. 7-2, a fan module includes: a housing 1, a fan motor 2 and a fan blade 3. The fan motor 2 is arranged in the housing 1; the fan blade 3 is provided with a first balance ring portion 33 and a second balance ring portion 34, and the diameter of the first balance ring portion 33 is greater than the diameter of the second balance ring portion 34.

In the above embodiment, the fan motor 2 and the fan blade 3 of the fan module are arranged in the housing 1, and the first balance ring part 33 and the second balance ring part 34 are provided on the fan blade 3. By filling the corresponding positions of the first balance ring part 33 and the second balance ring part 34 with balance soil, the mass distribution of the fan blade 3 is balanced, so that the rotation efficiency and stability of the fan blade 3 are improved. At the same time, the two adjustment ring parts of the first balance ring part 33 and the second balance ring part 34 can increase the adjustable space of the fan blade 3, so as to achieve the purpose of balancing the mass deviation of the fan blade 3 in a larger range. The diameter of the first balance ring part 33 is greater than the diameter of the second balance ring part 34. During the rotation of the fan blade 3, the torque of the first balance ring part 33 is greater than the torque of the second balance ring part 34. The same mass of balance soil has different regulating effects on the first balance ring part 33 and the second balance ring part 34. Therefore, this structure has different levels of balancing effect on the fan blade 3. The combination of the two can achieve more accurate mass balancing, thereby greatly improving the rotation efficiency and stability of the fan blade 3.

In this embodiment, the housing 1 is configured as a cylinder, and a cylindrical air cavity is provided inside the cylinder. However, the shape of the housing 1 is not limited thereto, and in some embodiments, the shape of the housing 1 can be a triangle, a quadrilateral, a pentagon, other polygons, or other regular shapes, depending on the specific application scenario.

In this embodiment, the housing 1 is provided with an air cavity that runs through the upper and lower surfaces thereof, and the air cavity is configured in a cylindrical shape. However, the shape of the air cavity is not limited thereto, and in some embodiments, the shape of the air cavity can be star-shaped, heart-shaped, runway-shaped, or polygonal, depending on the specific application scenario.

In some embodiments, a horn or a fairing with a necked opening is further disposed in the housing 1 .

The fan motor 2 is arranged in the housing 1 through the connecting member 4. In some embodiments, the connecting member 4 includes: a connecting ring 41 and a plurality of connecting plates 42, the plurality of connecting plates 42 are arranged around the connecting ring 41, one end of each of the plurality of connecting plates 42 is connected to the inner surface of the housing 1, the other end of each of the connecting plates 42 is connected to the connecting ring 41, and two adjacent connecting plates 42 in the plurality of connecting plates 42 are enclosed to form an air duct. The connecting ring 41 is interference-fitted or snap-fitted with the fan motor 2, or a connecting column 43 is arranged on the connecting ring 41, and the fan motor 2 is sleeved on the connecting column 43.

Please refer to Figure 7-3 and Figure 7-4. Figure 7-3 is a schematic diagram of the structure of the housing of this embodiment from a first viewing angle; Figure 7-4 is a schematic diagram of the structure of the housing of this embodiment from a second viewing angle.

As shown in FIG. 7-3 and FIG. 7-4 , the arrangement of multiple connecting plates 42 enables the connecting ring 41 to be suspended in the shell 1 , and every two connecting plates 42 among the multiple connecting plates 42 enclose an air duct, allowing the airflow driven by the fan assembly to flow through the air duct.

The connection member 4 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connection member 4 can be a connector formed perpendicular to the inner surface of the shell 1 .

The fan motor 2 is fixed on the connecting ring 41. However, the fixing method of the fan motor 2 is not limited thereto. According to different specific application scenarios, in some embodiments, a connecting column 43 is provided on the connecting ring 41, and the fan motor 2 can be sleeved on the connecting column 43. The connecting column 43 can be integrally formed with the connecting ring 41, or can be fixed on the connecting ring 41 by means of clamping, riveting, screw connection or gluing.

In some embodiments, the fan motor 2 includes: a coil 22 and a magnetic ring 23, wherein the coil 22 is sleeved on the connecting column 43 and has an interference fit with the connecting column 43, and the magnetic ring 23 is arranged in the fan blade 3. One end of the rotating shaft 21 is connected to the fan blade 3, and the other end is connected to the connecting column 43.

In some embodiments, the fan motor 2 includes: a coil 22, a magnetic ring 23 and a motor housing 24, the coil 22 is sleeved on the connecting column 43 and has an interference fit with the connecting column 43, the magnetic ring 23 is arranged in the motor housing 24 and sleeved on the coil 22. One end of the rotating shaft 21 is connected to the fan blade 3, and the other end is connected to the connecting column 43 and has an interference fit with the motor housing 24.

In some embodiments, the fan motor 2 is a conventional motor, which is fixed to the connecting ring 41 by means of clamping, screw fixing, riveting, adhesive connection, welding, etc.

In some embodiments, the fan motor 2 can be connected to the housing 1 through the structure inside the housing 1, for example, a connecting platform is provided on the inner wall of the housing 1, and the connecting platform is connected to the fan motor 2. Alternatively, a connecting rod is inserted into the housing 1, and the fan motor 2 is fixed on the connecting rod. Alternatively, two opposite clamping parts extend inwardly from the inner surface of the housing 1 to clamp and fix the fan motor 2.

In some embodiments, an abutment plate extends from the inner surface of the housing 1 toward the fan motor 2 to fix the fan motor 2 by clamping, or a supporting structure extends laterally from the housing 1 to fix the fan motor 2 .

The fan motor 2 is connected to the fan blades 3 via the rotating shaft 21. One end of the rotating shaft 21 is connected to the fan motor 2 and the connecting column 43, and the other end is connected to the fan blades 3. However, the connection method of the rotating shaft 21 is not limited thereto. Depending on the specific application scenario, in some embodiments, the end of the rotating shaft 21 connected to the fan motor 2 is also connected to the connecting column 43. In some embodiments, when the magnetic ring 23 is fixed in the fan blades 3, one end of the rotating shaft 21 is only connected to the connecting ring 41 or the connecting column 43, and the other end is connected to the fan blades 3.

In this embodiment, the ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 3 is 1.01-1.15. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 3 defines the gap between the housing 1 and the maximum diameter of the fan blades 3. When the fan blades 3 rotate, centrifugal force is generated on the airflow passing through the fan blades 3. Under the action of the centrifugal force, the airflow moves laterally and collides with the inner wall of the housing 1, generating turbulence, thereby affecting the airflow field in the housing 1, resulting in a low air outlet efficiency of the fan module. The ratio range of the inner diameter of the housing 1 to the maximum diameter of the fan blades 3 is limited to 1.01-1.15, which limits the gap between the fan blades 3 and the housing 1, reduces the stroke of the lateral airflow under the action of the centrifugal force, and limits the speed of the airflow when it contacts the inner side surface of the housing 1 to a smaller priority range. Therefore, this ratio can reduce the energy loss when the airflow collides with the housing 1, reduce the probability of turbulence, and improve the stability of the airflow field. At the same time, since the ratio range of the inner diameter of the shell 1 and the maximum diameter of the fan blades 3 is limited to between 1.01 and 1.15, within this ratio range, the distance between the fan blades 3 and the shell 1 is small, which can have an excellent interception effect on the return airflow in the fan blades 3, preventing the cyclone generated by the return airflow from affecting the air intake of the fan blades 3, thereby improving the air intake efficiency of the fan module. The improvement in the air intake efficiency improves the overall air outlet efficiency of the fan module.

Please refer to Figure 7-5 and Figure 7-6. Figure 7-5 is a schematic diagram of the structure of the fan blades of this embodiment from a first viewing angle; Figure 7-6 is a schematic diagram of the structure of the fan blades of this embodiment from a second viewing angle.

As shown in FIG. 7-5 and FIG. 7-6, the first balance ring part 33 and the second balance ring part 34 are both surrounded by a plurality of balance grooves 35. As the smallest balance unit, the independent balance groove 35 is conducive to quantifying the balance adjustment and is convenient for the user to perform leveling. At the same time, since the balance grooves 35 of the first balance ring part 33 and the second balance ring part 34 have different torques, the balance grooves 35 of the first balance ring part 33 have a larger torque and can be used for coarse adjustment, and the balance grooves 35 of the second balance ring part 34 have a smaller torque and can achieve fine adjustment. The combination of the two can achieve a combination of coarse adjustment and fine adjustment, and achieve more accurate leveling.

The number of the balancing grooves 35 of the first balancing ring portion 33 can be (not limited to): 2, 3, 4, 5, 10, 18, 26 or more. The number of the balancing grooves 35 of the first balancing ring portion 33 can be arbitrarily set based on actual needs.

The number of the balancing grooves 35 of the second balancing ring portion 34 can be (not limited to): 2, 3, 4, 5, 11, 18, 26 or more. The number of the balancing grooves 35 of the second balancing ring portion 34 can be arbitrarily set based on actual needs.

In some embodiments, the first balance ring portion 33 is configured as an annular groove, and the second balance ring portion 34 is also configured as an annular groove.

In some embodiments, the number of balancing grooves 35 of the first balancing ring portion 33 is greater than the number of balancing grooves 35 constituting the second balancing ring portion 34. The number of balancing grooves 35 of the first balancing ring portion 33 is greater than the number of balancing grooves 35 of the second balancing ring portion 34, which can make the adjustable range of the first balancing ring portion 33 larger and increase the adjustable space of the fan blades 3. At the same time, since the torque of the first balancing ring portion 33 is greater and the number of balancing grooves 35 of the first balancing ring portion 33 is greater, the upper limit of the interval for leveling the fan blades 3 can be maximized, thereby increasing the scene adaptability of the fan blades 3.

The balancing groove 35 of the first balancing ring portion 33 is configured in a square shape. However, the shape of the balancing groove 35 of the first balancing ring portion 33 is not limited to that of a circle, an ellipse, a semicircle, a semi-ellipse, a racetrack, a wedge, or other polygons other than a quadrilateral, etc., depending on the specific application scenario.

The balancing groove 35 of the second balancing ring portion 34 is configured in a wedge shape. However, the shape of the balancing groove 35 of the second balancing ring portion 34 is not limited to that of a circle, an ellipse, a semicircle, a semi-ellipse, a racetrack, a polygon, etc., depending on the specific application scenario.

The fan blades 3 include: a hub 31 and a plurality of blades 32 , wherein the plurality of blades 32 extend obliquely around the surface of the hub 31 , and the hub 31 is connected to the rotating shaft 21 .

In this embodiment, the number of blades 32 is 9. However, the number of blades 32 is not limited thereto, and according to different specific application scenarios, in some embodiments, the number of blades 32 can be (not limited to): 2, 3, 4, 5, 6, 7, 8, 10, 11 or more.

The first balancing ring portion 33 and the second balancing ring portion 34 are both arranged on the surface of the hub 31. Such an arrangement of the first balancing ring portion 33 and the second balancing ring portion 34 facilitates the filling of balancing soil and makes the leveling work more convenient.

In some embodiments, the first balancing ring portion 33 is disposed on the inner surface of the hub 31, and the second balancing ring portion 34 is disposed on the surface of the hub 31. The arrangement of the first balancing ring portion 33 and the second balancing ring portion 34 can more directly adjust the mass imbalance formed on the inner surface of the hub 31. At the same time, the balancing soil in the first balancing ring portion 33 is more firmly connected under the centrifugal force when the fan blades 3 rotate.

The wheel hub 31 includes: a top surface 311, a bottom surface 313 and a side edge 312. The cross-sectional area of the bottom surface 313 is larger than the cross-sectional area of the top surface 311, and there is a smooth transition between the top surface 311 and the side edge 312. The first balance ring portion 33 is arranged on the side edge 312 and connected to the bottom surface 313. The second balance ring portion 34 is arranged on the side edge 312.

That is, in this embodiment, the hub 31 is configured to be in the shape of a bullet head with a flat head. This shape of the hub 31 enables the airflow passing through the blades 32 to flow along the arc surface formed by the smooth transition between the top surface 311 and the side edge 312 to form a wall effect, which has a good guiding effect on the airflow, improves the efficiency of the airflow flowing in the fan blades 3, and further improves the air outlet efficiency of the fan module.

The first balancing ring portion 33 is arranged on the side 312 and communicates with the bottom surface 313, and the second balancing ring portion 34 is arranged on the side 312. The first balancing ring portion 33 is arranged at the position where the torque of the hub 31 is the largest, which maximizes the leveling effect of the first balancing ring portion 33 and improves the upper limit of leveling. The combination of the positions of the first balancing ring portion 33 and the second balancing ring portion 34 can make the leveling of the fan blade 3 more hierarchical, and improve the upper limit and accuracy of leveling.

However, the shape of the hub 31 is not limited thereto. Depending on the specific application scenario, in some embodiments, the shape of the hub 31 can be (but not limited to): hemispherical, conical, truncated cone, cylindrical, etc.

The top surface 311 of the hub 31 is a circular surface. However, the shape of the top surface 311 is not limited thereto, and according to different specific application scenarios, in some embodiments, the top surface 311 of the hub 31 can also be conical, polygonal, elliptical or other shapes.

An opening is provided on the bottom surface 313 of the hub 31, and the opening is connected to the accommodating cavity inside the hub 31, and a connecting sleeve is provided in the accommodating cavity. In some embodiments, a plurality of reinforcing ribs are provided around the connecting sleeve, and the plurality of reinforcing ribs are arranged around the connecting sleeve, one end of the reinforcing rib is connected to the connecting sleeve, and the other end of the reinforcing rib is connected to the inner surface of the hub 31.

Each blade 32 among the multiple blades 32 includes a first end 321 and a second end 322 opposite to the first end 321, the length of the first end 321 is greater than the length of the second end 322, the first balance ring portion 33 is arranged on a side adjacent to the second end 322, and the second balance ring portion 34 is arranged on a side adjacent to the first end 321.

The first end 321 is located adjacent to the top surface 311 of the hub 31, and the second end 322 is located adjacent to the bottom surface 313 of the hub 31. In each blade 32, the first end 321 is used to push the airflow into the fan blade 3 when the fan blade 3 rotates. The longer length of the first end 321 is conducive to pushing the airflow. The second end 322 is located at the end of the airflow direction. The reduction in the length of the second end 322 is conducive to reducing the size of the space where the airflow flows, compressing the airflow, and increasing the initial kinetic energy of the airflow, thereby improving the air outlet efficiency of the fan module.

In some embodiments, the length ratio of the first end 321 to the second end 322 is in the range of 1.4-1.9. The airflow flowing through the fan flows from the first end 321 to the second end 322, and the direction of the first end 321 facing the second end 322 gradually decreases. This reduction process cooperates with the size change of the hub 31 to gradually reduce the space for the airflow to flow, gradually pressurize the convection, and increase the initial velocity of the airflow. However, since there is a gap between the fan blades 3 and the housing 1, when the pressure of the airflow entering the first end 321 and flowing out of the second end 322 is obviously too large, since it is not a completely closed space, the airflow will flow back due to excessive pressure. The backflow airflow will impact the intake airflow of the fan module to form a cyclone, reducing the air intake efficiency of the fan module. The length ratio of the first end 321 to the second end 322 is limited to 1.4-1.9. Within this ratio range, the airflow pressure flowing through the fan blades 3 is adjusted within the optimal range, which minimizes the airflow caused by excessive pressure. At the same time, within the range of this ratio, the first end 321 can most effectively intercept and utilize the return airflow gradually overflowing from the edge of the blade 32, and reduce the probability of the return airflow flowing out of the housing 1 to the greatest extent. The combination of the two functions can make the airflow entering the first end 321 and the airflow outflowing from the end of the airflow approach the optimal value of 1:1. The air outlet efficiency of the fan blade 3 is greatly improved.

The first balance ring portion 33 is arranged on a side adjacent to the second end portion 322, and the second balance ring portion 34 is arranged on a side adjacent to the first end portion 321. The first balance ring portion 33 and the second balance ring portion 34 are arranged on both sides of the blade 32, and the spatial layout is reasonable, and will not affect the normal layout of the surface of the fan blade 3. The first balance ring portion 33 and the second balance ring portion 34 distributed on both sides of the blade 32 can better adjust the imbalance problem of the fan blade 3 caused by the uneven mass distribution of the blade 32. At the same time, the distance between the first balance ring portion 33 and the second balance ring portion 34 is greater than the length of the blade 32, which can expand the leveling coverage of the first balance ring portion 33 and the second balance ring portion 34 to the entire fan page, thereby improving the leveling range.

Each blade 32 is provided with a blade edge 323. The thickness of each blade 32 gradually increases from the first end 321 to the blade edge 323, and the thickness of each blade 32 gradually decreases from the blade edge 323 to the second end 322. The thickness of different parts of the blade 32 varies, so that each blade 32 is constructed into a structure that is thinner at both ends and thicker in the middle. This structure enhances the cutting ability of the two ends of the blade 32 on the airflow and reduces the air resistance at both ends of the blade 32. The increase in the thickness of the middle part can enhance the physical strength of the blade 32. At the same time, the increase in the thickness of the blade 32 reduces the space between two adjacent blades 32, which has a pressurizing effect on the airflow passing through.

The second balancing ring portion 34 is disposed between the top surface 311 and the first end portion 321, and the plurality of balancing grooves 35 of the second balancing ring portion 34 are enclosed and configured to be in a truncated cone shape. Since the cross-sectional area of the hub 31 increases from the top surface 311 to the bottom surface 313 of the hub 31, the side edge 312 of the hub 31 is configured to be in an arc shape. The plurality of balancing grooves 35 of the second balancing ring portion 34 are enclosed and configured to be in a truncated cone shape, so that the distribution of the balancing grooves 35 is more reasonable, conforming to the trend change of the side wall, and improving the space utilization rate.

The multiple balancing grooves 35 of the first balancing ring portion 33 are arranged in pairs between two adjacent blades 32. Two adjacent balancing grooves 35 of the first balancing ring portion 33 are separated by a first partition plate 331 or a second partition plate 332. Along the circumferential direction of the hub 31, the length of the second partition plate 332 is greater than the length of the first partition plate 331.

The plurality of balancing grooves 35 of the first balancing ring portion 33 are arranged in pairs between two adjacent blades 32. This design reasonably utilizes the space of the fan blades 3, increases the number of balancing grooves 35 that can be arranged on the first balancing ring portion 33, and improves the ability to level the fan blades 3.

Two adjacent balancing grooves 35 of the first balancing ring portion 33 are separated by a first partition plate 331 or a second partition plate 332. Each independent balancing groove 35 serves as the minimum leveling unit of the first balancing ring portion 33. The balancing grooves 35 are isolated from each other, thereby avoiding mutual interference when filling balancing soil between the balancing grooves 35 and improving the filling efficiency.

Along the circumferential direction of the hub 31, the length of the second partition 332 is greater than that of the first partition 331. The change in the interval length makes the leveling ability of the first balance ring part 33 not the superposition of the unit leveling ability, but a numerical span appears. This span change is combined with the fine-tuning ability of the second balance ring part 34. The fine-tuning ability is a supplement to the numerical span, which can quickly achieve the leveling purpose.

In some embodiments, the second partition 332 is connected to the second end 322 of the blade 32 . This connection method fully utilizes the space of the fan blade 3 , extends the length of the blade 32 , and improves the air outlet efficiency of the fan blade 3 .

The fan module housing 1 is provided with a flexible sleeve 5, and the flexible sleeve 5 is alternately provided with annular protrusions 51 and dot-shaped protrusions 52. The anti-fall performance of the fan module is improved, and when used in combination, the noise and vibration of the fan module can be reduced.

It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

Example 2

A blowing device includes the fan module in Example 1, wherein the fan module serves as a core module component for assembling the blowing device.

It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers and other products that need to promote air circulation. The fan module in Example 1 is assembled inside the shell of the above products.

The fan motor 2 and the fan blade 3 of the fan module of the blowing device in this embodiment are arranged in the housing 1, and the first balance ring part 33 and the second balance ring part 34 are provided on the fan blade 3. By filling the balance soil into the corresponding positions of the first balance ring part 33 and the second balance ring part 34, the mass distribution of the fan blade 3 is balanced, so that the rotation efficiency and stability of the fan blade 3 are improved. At the same time, the two adjustment ring parts of the first balance ring part 33 and the second balance ring part 34 can increase the adjustable space of the fan blade 3, so as to achieve the purpose of balancing the mass deviation of the fan blade 3 in a larger range. The diameter of the first balance ring part 33 is greater than the diameter of the second balance ring part 34. During the rotation of the fan blade 3, the torque of the first balance ring part 33 is greater than the torque of the second balance ring part 34. The same mass of balance soil has different regulating effects on the first balance ring part 33 and the second balance ring part 34. Therefore, this structure has different levels of balancing effect on the fan blade 3. The combination of the two can achieve more accurate mass balancing, thereby greatly improving the rotation efficiency and stability of the fan blade 3.

Scheme 8 is shown in Figures 8-1 to 8-9.

As shown in FIG. 8-1 to FIG. 8-4 , the portable fan of the present application includes an air outlet portion 100 and a hand-held portion 200 . The air outlet portion 100 is used for discharging air, and the hand-held portion 200 is used for being held by a user, so that the user can hold and move the fan for easy use.

The air outlet 100 includes a housing 1, a casing 2, a first buffer 30 and a cylinder 4 from the outside to the inside. The cylinder 4 has air inlet at the rear end and air outlet at the front end. A motor 5 and a fan 6 are arranged in the cylinder 4. The motor 5 is a high-speed three-phase motor, which can provide sufficient power. force and speed to ensure the wind force of the portable fan. The first buffer 30 is arranged outside the cylinder 4, the casing 2 is arranged outside the first buffer 30, and the outer shell 1 is arranged outside the casing 2. By setting a four-layer structure of the cylinder 4, the first buffer 30, the casing 2 and the outer shell 1, the layers are fixed and the overall structure is stable. While using a high-speed three-phase motor, the overall shock absorption effect is ensured to be good. The first buffer 30 is arranged outside the cylinder 4. The first buffer 30 absorbs and reduces the vibration caused by the high-speed three-phase motor in time, so that the portable fan can continue to rotate at a high speed stably.

In one embodiment, as shown in Fig. 8-1 to Fig. 8-4, the casing 2 is integrally formed and penetrates from front to back, a limiting portion 20 is provided inside the casing 2, the cylinder 4 and the first buffer 30 are inserted into the casing 2 from back to front, and the limiting portion 20 limits the cylinder 4 and the first buffer 30. The outer diameter of the cylinder 4 is equal to or greater than the inner diameter of the first buffer 30, and the outer diameter of the first buffer 30 is equal to or greater than the inner diameter of the casing 2. The cylinder 4, the first buffer 30 and the casing 2 are tightly matched and have a stable structure. The outer shell 1 is integrally formed and penetrates from front to back, the outer diameter of the casing 2 is smaller than the inner diameter of the casing 1, and a plurality of ribs are equidistantly provided on the inner surface of the casing 1, so that the casing 2 can be easily inserted into the inner side of the casing 1, and a plurality of ribs can help tighten the casing 2. Of course, in other embodiments, a plurality of ribs can be equidistantly provided on the outer surface of the casing 2.

As shown in Fig. 8-2 and Fig. 8-4, the first buffer member 30 is used as an isolation buffer interface between the barrel 4 and the casing 2. In one embodiment, the first buffer member 30 is a smooth surface; in another embodiment, in order to enhance its isolation and buffering properties, a plurality of convex points may be arranged at intervals on the outer surface of the first buffer member. In addition, the first buffer member 30 may only cover part of the outer surface of the barrel 4, or may cover the entire outer surface of the barrel 4, or may cover the front end face and the rear end face of the barrel 4, but is not limited thereto.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4 and Fig. 8-6, the cylinder 4 includes an outer ring portion 40, an inner ring portion 41, and a plurality of first connecting leaves 42 connecting the outer ring portion 40 and the inner ring portion 41, wherein the inner ring portion 41 is shorter than the outer ring portion 40, and the inner ring portion 41 is located at the inner side corresponding to the front end portion of the outer ring portion 40, and the front end of the inner ring portion 41 exceeds the front end of the outer ring portion 40 forward. A base plate 44 is provided in the inner ring portion 41, and a hollow shaft cylinder 45 protrudes backward from the base plate 44. The motor 5 includes a stator assembly 51 and a rotor assembly, wherein the stator assembly 51 and the rotor assembly are nested and fixed, and fixed to the shaft cylinder 45 from the rear, and the fan 6 is installed at the rear side of the rotor assembly. The motor 5 further includes a driving plate 52. The front end of the inner ring portion 41 is provided with a receiving portion 46 and a buckle 47. The receiving portion 46 is used to receive the driving plate 52, and the buckle 47 is used to buckle and fix the driving plate 52. The base plate 44 is provided with a wire passing opening 440, and the wire passes through the wire passing opening 440 to electrically connect the driving plate 52 and the stator assembly 51. The driving plate 52 is electrically connected to the stator assembly 51, and drives the rotor assembly and the fan 6 to rotate.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4, Fig. 8-7 and Fig. 8-8, the rotor assembly includes a rotating shaft 501, a bearing 502 and a stopper 503, wherein the bearing 502, the stopper 503 and the stator assembly 51 are all inserted outside the rotating shaft 501. The shaft cylinder 45 extends backward beyond the rear end of the inner ring portion 41, but does not extend beyond the rear end of the outer ring portion 40. The rotating shaft 501 is inserted into the shaft cylinder 45 from back to front, and two bearings 502 are provided, one of which is clamped outside the rotating shaft 501 and inside the shaft cylinder 45 from back to front, and the other bearing 502 is clamped outside the rotating shaft 501 and inside the shaft cylinder 45 from front to back. The shaft cylinder 45 is provided with a second buffer (not shown, the same below) between the two bearings 502, and the inner diameter of the shaft cylinder 45 corresponding to the second buffer is smaller than the inner diameter of the shaft cylinder 45 corresponding to the bearing 502. A slot is provided radially outside the front of the rotating shaft 501, and the stopper 503 is fixed in the slot from front to back, and a third buffer 31 is provided between the front bearing 502 and the stopper 503. The second buffer and the third buffer 31 can effectively absorb and reduce the vibration between the rotating shaft 501 and the shaft cylinder 45, and the shock absorption effect is good.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4, Fig. 8-5 and Fig. 8-8, the rotor assembly further comprises a housing 504 and a magnetic ring 505, the housing 504 is open to the front, the housing 504 comprises a rear portion and a side portion, the magnetic ring 505 is fixed to the inner side of the side portion of the housing 504, and the stator assembly 51 is fixed to the inner side of the magnetic ring 505. In the radial direction, the stator assembly 51, the magnetic ring 505 and the side portion of the housing 504 are sleeved on the outer side of the shaft cylinder 45, and the front end of the side portion of the housing 504 and the inner ring portion 41 are arranged in close proximity in the axial direction. The interval between the side portion of the housing 504 and the rear end of the inner ring portion 41 is smaller than the interval between the rear portion of the housing 504 and the rear bearing 502, so that even if the portable fan falls or is hit by other external impacts, the rear portion of the housing 504 will not impact and damage the rear bearing 502. The distance between the side of the casing 504 and the rear end of the inner ring portion 41 is smaller than the distance between the front end of the rotating shaft 501 and the rear end of the driving plate 52, so that even if the portable fan falls or is hit by other external impacts, the front end of the bearing 502 will not hit and damage the driving plate 52.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4, Fig. 8-5 and Fig. 8-8, the outer diameter of the cylinder 4 is 23.71-24.05 mm, the length of the cylinder 4 is 30-33.05 mm, and the volume of the cylinder 4 is small, so that the overall volume of the portable fan can also be small, thereby improving the portability of the portable fan. The cylinder 4 also includes a plurality of extension leaves 43, which correspond to the first connecting leaves 42 one by one, and extend backward from the first connecting leaves 42 to form the extension leaves 43. The first connecting leaves 42 extend vertically forward, and the extension leaves 43 extend in an arc shape, and the plurality of extension leaves 43 surround the outside of the side of the housing 504.

In one embodiment, as shown in Fig. 8-3, Fig. 8-4, Fig. 8-5 and Fig. 8-8, the fan 6 is fixedly arranged at the rear end of the rotating shaft 501, and the front end of the fan 6 is arranged closely to the rear end of the housing 504 in the axial direction. The fan 6 is arranged coaxially with the motor 5, and the fan 6 and the housing 504 are arranged closely to each other, so there is no need to arrange a transmission device between the motor 5 and the fan 6, which effectively improves the transmission efficiency of the fan 6. The fan 6 includes a hub 60 and a plurality of blades 61 arranged outside the hub 60. The fourth buffer member 32 passes through the notch at the rear of the housing 504 and is disposed between the bearing 502 at the rear and the ribs 62 of the fan 6. The rear end of the fourth buffer member 32 abuts against the ribs 62, and the front end of the fourth buffer member 32 abuts against the bearing 502 at the rear. The fourth buffer member 32 effectively absorbs and reduces the vibration of the high-speed rotation of the fan 6, and has a good shock absorption effect.

In one embodiment, as shown in Fig. 8-4, Fig. 8-5 and Fig. 8-8, a fifth buffer (not numbered, the same below) is sleeved on the outer side of one of the two bearings 502; in another embodiment, the outer sides of the two bearings 502 are sleeved with fifth buffers, and both are arranged in the shaft cylinder 45; in another embodiment, the outer sides of the two bearings 502 are sleeved with fifth buffers, the front bearing 502 is arranged in the shaft cylinder 45, and the rear bearing 502 is not arranged in the shaft cylinder 45, but directly arranged in the rotor assembly. The fifth buffer effectively absorbs and reduces the vibration of the high-speed rotation of the bearing 502, and has a good shock absorption effect.

In one embodiment, as shown in FIG. 8-3 to FIG. 8-5, the fan 6 is a diagonal flow fan 6, the hub 60 radially increases and extends from the back to the front, and the hub 60 is arc-shaped. The diameter of the hub 60, the diameter of the housing 504, and the diameter of the inner ring portion 41 are less than 0.5 mm apart from each other, and in the axial direction, the housing 504 and the inner ring portion 41 are arranged closely spaced from front to back, and the hub 60 and the housing 504 are arranged closely. The rear end of the fan 6 does not extend backward beyond the rear end of the outer ring portion 40, and the fan 6 can be completely arranged in the four-layer structure of the outer ring portion 40, the first buffer 30, the casing 2, and the outer shell 1, which can effectively absorb and reduce the noise of the high-speed rotation of the fan 6. It should be understood that the channel between the inner ring portion 41 and the outer ring portion 40, and the channel between the side of the housing 504 and the outer ring portion 40 belong to the air duct of the portable fan. The fan 6 rotates, and the high-speed rotating blades 61 generate high-speed turbulence, which first flows through the bent and extended extension blades 43 to be initially combed, then flows through the first connecting blades 42 extending vertically forward to be combed again, and is guided to be ejected vertically forward to reduce kinetic energy loss and retain large air volume and high wind pressure.

In one embodiment, as shown in FIG. 8-2 to FIG. 8-5, the air outlet portion 100 further includes an air inlet cover assembly 7 and an air outlet cover 8, wherein the air inlet cover assembly 7 is fixed to the rear side of the casing 2 and is arranged at the rear side of the outer shell 1. The air outlet cover 8 is fixed to the front side of the casing 2 and is arranged at the front side of the outer shell 1. A first fixing portion 21 is provided at the front side of the casing 2, and a first matching portion 70 is provided at the outer side of the air outlet cover 8, and the first fixing portion 21 and the first matching portion 70 are fixed in a corresponding manner. A second fixing portion 22 is provided at the rear side of the casing 2, and the air inlet cover assembly 7 is provided with a second matching portion 80, and the second fixing portion 22 and the second matching portion 80 are fixed in a corresponding manner.

In one embodiment, as shown in Figures 8-2 to 8-5, the axial length of the shell 1 is 53.6-54 mm, there is a first spacing between the rear end of the air inlet cover assembly 7 and the rear end of the hub 60, and there is a second spacing between the front end of the air outlet cover 8 and the front end of the hub 60, and the first spacing is smaller than the second spacing, so that the airflow has sufficient air inlet distance and air outlet distance, so that the guide, rectification and pressurization structures are set in the air inlet distance and the air outlet distance, to ensure that the portable fan can increase the air volume, wind pressure and wind efficiency even when the volume is limited.

In one embodiment, as shown in Fig. 8-2, Fig. 8-3, Fig. 8-4 and Fig. 8-9, the air inlet cover assembly 7 comprises a rear shell 71, a fairing 72, a housing 73 and a fastener 74, wherein the fastener 74 fixes the rear shell 71 and the housing 73, and the rear shell 71, the housing 73 and the fairing 72 are all located at the rear side of the hub 60. The rear shell 71 is hollow, and a protrusion 710 and a first fixing hole 714 are provided at the front end of the rear shell 71. A housing 721 is provided at the edge of the fairing 72, and the housing 721 cooperates with the protrusion 710, and the fairing 72 covers the radial inner side of the rear shell 71. A second fixing hole 730 is provided at the rear end of the housing 73, and the fastener 74 fixes the first fixing hole 714 and the second fixing hole 730, and the rear shell 71 and the housing 73 clamp the fairing 72. The fairing 72 includes a plurality of air inlet holes 720, and the thickness of the fairing 72 is 0.4 mm. The rear shell 71 includes a plane portion 711, a radial guide portion 712 and an axial guide portion 713 which are connected in sequence in a radial direction. The front end of the axial guide portion 713 is provided with a first step portion, and the first step portion is convexly provided with the protrusion 710. The edge of the fairing 72 is provided at the first step portion, and the clamping hole 721 cooperates with the protrusion 710. The rear end of the clamping shell 73 is arranged corresponding to the first step portion to clamp the fairing 72 with the first step portion. The radial guide portion 712 is an arc surface, and radially decreases from the plane portion 711 to the axial guide portion 713. The minimum inner diameter of the plane portion 711 is greater than the inner diameter of the axial guide portion 713. The inner side surface of the axial guide portion 713 extends forward substantially radially unchanged, and the inner side surface of the clamping shell 73 extends forward substantially radially unchanged. Of course, the inner side surface of the axial guide portion 713 and the inner side surface of the jamming shell 73 can also be radially tapered and extended forward with a very small amplitude. The airflow is introduced from the arc-shaped radial guide portion 712, and the inner side surface of the axial guide portion 713 and the inner side surface of the jamming shell 73 remain unchanged in radial direction, so that the airflow encounters less resistance and generates less turbulence, which can reduce the noise generated by airflow disturbance and help guide the airflow to flow forward. Under the condition that the overall volume of the portable fan is limited, the air volume and wind pressure are increased. At the same time, the fairing 72, which has a thickness and a plurality of air inlet holes 720, can organize the airflow well, so that the airflow can be more gathered and smoothly enter the portable fan.

In one embodiment, as shown in Figures 8-3 to 8-5, the minimum inner diameter of the plane portion 711 is R1, and the distance between the plane portion 711 and the rear end of the hub 60 is D1, 0.5R<D1<R1<2D1; the inner diameter of the axial guide portion 713 is R2, and the distance between the rear end of the axial guide portion 713 and the rear end of the hub 60 is D2, 0.5R2<D2<R2<2D2. Too large D1 and D2 will affect the layout distribution of the portable fan, while too small D1 and D2 will increase the intake loss of the portable fan and affect the performance of the portable fan. Therefore, by determining the numerical range of D1 and D2 corresponding to the numerical values of R1 and R2, an excellent intake length can be designed, so that the airflow encounters less resistance, generates less turbulence, increases the air volume, wind pressure and wind efficiency, and reduces the noise of the air intake.

In one embodiment, as shown in FIGS. 8-2 to 8-5 , the air outlet cover 8 includes an outer cover portion 81, an inner cover portion 82, and a plurality of second connecting leaves 83 connecting the outer cover portion 81 and the inner cover portion 82, and the outer cover portion 81 and the inner cover portion 82 form the portable fan. The second connecting blade 83 is spaced more than 3.5 mm from the first connecting blade 42 in the axial direction. It should be understood that the first connecting blade 42 and the second connecting blade 83 are both stationary blades. Double stationary blades are used to replace ordinary stationary blades, and there is a gap between the double stationary blades. When the airflow passes through the double stationary blades, it is ensured that there is enough buffer space, and part of the airflow will not rebound, which can prevent the generation of turbulence and reduce noise.

In one embodiment, as shown in Fig. 8-2 to Fig. 8-5, the front end of the outer cover part 81 is in front of the front end of the inner cover part 82, the rear end of the inner cover part 82 is open, the front end is sealed, and the front end of the inner cover part 82 is formed with a negative pressure surface 820 that is recessed backwards, and the negative pressure surface 820 has the effect of gathering and replenishing wind, so that the wind blown out from the air outlet is more concentrated and strong, and the blowing distance is farther. The outer side surface of the inner cover part 82 first radially increases and extends from the back to the front and then radially decreases and extends, and the radially increased portion of the outer side surface of the inner cover part 82 is longer than the radially decreased portion of the outer side surface of the inner cover part 82, and the diameter of the front end of the inner cover part 82 is greater than the diameter of the rear end of the inner cover part 82. The front end of the inner ring part 41 is open, and the front end of the inner ring part 41 is provided with a driving plate 52, which is convenient for installing the driving plate 52 and is conducive to connecting the driving plate 52 with the wire. The rear end of the inner cover portion 82 is disposed adjacent to the front end of the inner ring portion 41 to shield and protect the drive plate 52 and reduce dust and impurities from entering the drive plate 52 to affect normal use.

In one embodiment, the thickness of the air hood 8 in the axial direction is 12.7-12.82 mm, which is conducive to enhancing wind pressure and making the air outlet distance longer. The front end of the housing 1 is protruding with a second step portion, and the front end of the outer cover portion 81 first expands and extends radially forward and outward, then bends and extends backward and wraps the second step portion, thereby strengthening the fit and fixation between the air hood 8 and the housing 1.

In one embodiment, as shown in Fig. 8-1, Fig. 8-2 and Fig. 8-4, the length of the housing 1 in the axial direction is 53.6-54 mm, at least part of the air inlet cover assembly 7 is arranged inside the housing 1, at least part of the air outlet cover 8 is arranged inside the housing 1, and the distance between the rear end of the air inlet cover assembly 7 and the front end of the air outlet cover 8 is 59.6-60 mm. The air outlet 100 is compact in size and easy to carry.

In one embodiment, as shown in Fig. 8-1, Fig. 8-2, Fig. 8-3, Fig. 8-4 and Fig. 8-8, a power supply 209 and a control panel 210 are provided in the handheld part 200, and the air outlet 100 and the handheld part 200 are fixed. The housing 1 is provided with a notch 10 corresponding to the handheld part 200, and a first fool-proof block 11 is provided in front of the notch 10 on the inner side of the housing 1. The inner cover part 82 and the inner ring part 41 are arranged adjacent to each other in the axial direction, and a fool-proof hole 23 is provided on the front side of the sleeve 2. One of the second connecting leaves 83 is provided with a wire groove 830, and the wire groove 830 radially passes through the inner cover part 82 and the outer cover part 81, and a second fool-proof block 810 is provided on the outer side of the outer cover part 81 corresponding to the wire groove 830. The sleeve 2 is inserted into the outer shell 1 from back to front, the first anti-foolproof block 11 and the second anti-foolproof block 810 are both matched with the anti-foolproof hole 23, the missing groove 10, part of the anti-foolproof hole 23 and the wire groove 830 are connected, and the wire passes through the missing groove 10, the anti-foolproof hole 23 and the wire groove 830 to electrically connect the control board 210 and the drive board 52.

In one embodiment, as shown in Fig. 8-1 to Fig. 8-4, the housing of the handheld part 200 includes a left shell 201 and a right shell 202 that match each other, and the air outlet 100 also includes a mounting frame 9 protruding from the outer surface of the housing 1. A connecting frame 203 is provided inside the handheld part 200, and the connecting frame 203 includes a connecting top plate 204, and a front mounting portion 205, a rear mounting portion 206, a left mounting portion 207 and a right mounting portion 208 extending downward from four sides of the connecting top plate 204. The connecting top plate 204 is fixedly connected with the mounting frame 9, the left shell 201 is fixedly connected with the left mounting portion 207, the right shell 202 is fixedly connected with the right mounting portion 208, and the boss of the right shell 202 is inserted into the front mounting portion 205 and the rear mounting portion 206, and the control board 210 is clamped at the bottom of the connecting frame 203. The handheld part 200 further includes a switch 211 electrically connected to the front side of the control panel 210, an interface 212 electrically connected to the rear side of the control panel 210, and an anti-mistaken touch device 213 electrically connected to the side of the control panel 210. The switch 211 is exposed to the front side of the handheld part 200, the interface 212 is provided on the rear mounting part 206 and is exposed to the rear side of the handheld part 200, and the anti-mistaken touch device 213 is exposed to the left or right side of the handheld part 200. The power supply 209 is provided below the control panel 210 and is electrically connected to the control panel 210. The power supply 209 can directly supply power to the motor 5 to drive the fan 6 to rotate without connecting to an external power source.

In one embodiment, a sixth buffer member (not shown, the same below) is provided on the rear side of the negative pressure surface 820 , and the sixth buffer member is used for pressurizing and connecting the drive plate 52 and the control plate 210 , and can absorb the noise generated by the operation of the motor 5 .

It should be understood that the first buffer 31, the second buffer, the third buffer 32, the fourth buffer 33, the fifth buffer and the sixth buffer are all elastic, but the specific material and form can be selected from existing elastic materials, for example, the first buffer 31 can be a silicone material or a foam material; the second buffer, the third buffer 32, the fourth buffer 33 and the fifth buffer can be a spring material or a silicone material; the sixth buffer can be a silicone material or a foam material. The specific elastic material is not limited to the above examples, as long as it is elastic and can provide a buffering and shock absorbing effect.

Scheme 9 is shown in Figures 8-1 to 8-9.

As shown in FIG. 8-1 to FIG. 8-4 , the portable fan of the present application includes an air outlet portion 100 and a hand-held portion 200 . The air outlet portion 100 is used for discharging air, and the hand-held portion 200 is used for being held by a user, so that the user can hold and move the fan for easy use.

The air outlet part 100 includes an outer shell 1, a casing 2, a first buffer member 30 and a cylinder 4 from the outside to the inside. The cylinder 4 has air intake at the rear end and air outlet at the front end. A motor 5 and a fan 6 are arranged in the cylinder 4. The motor 5 is a high-speed three-phase motor. The high-speed three-phase motor can provide sufficient power and rotation speed to ensure the wind force of the portable fan. The first buffer member 30 is arranged outside the cylinder 4, the casing 2 is arranged outside the first buffer member 30, and the outer shell 1 is arranged outside the casing 2. By setting a four-layer structure of the cylinder 4, the first buffer member 30, the casing 2 and the outer shell 1, the layers are fixed and the overall structure is stable. While using a high-speed three-phase motor, the overall shock absorption effect is guaranteed to be good. A first buffer member 30 is disposed outside the cylinder body 4. The first buffer member 30 timely absorbs and reduces the vibration caused by the high-speed three-phase motor, so that the portable fan can continuously and stably rotate at a high speed.

In one embodiment, as shown in Fig. 8-1 to Fig. 8-4, the casing 2 is integrally formed and penetrates from front to back, a limiting portion 20 is provided inside the casing 2, the cylinder 4 and the first buffer 30 are inserted into the casing 2 from back to front, and the limiting portion 20 limits the cylinder 4 and the first buffer 30. The outer diameter of the cylinder 4 is equal to or greater than the inner diameter of the first buffer 30, and the outer diameter of the first buffer 30 is equal to or greater than the inner diameter of the casing 2. The cylinder 4, the first buffer 30 and the casing 2 are tightly matched and have a stable structure. The outer shell 1 is integrally formed and penetrates from front to back, the outer diameter of the casing 2 is smaller than the inner diameter of the casing 1, and a plurality of ribs are equidistantly provided on the inner surface of the casing 1, so that the casing 2 can be easily inserted into the inner side of the casing 1, and a plurality of ribs can help tighten the casing 2. Of course, in other embodiments, a plurality of ribs can be equidistantly provided on the outer surface of the casing 2.

As shown in Fig. 8-2 and Fig. 8-4, the first buffer member 30 is used as an isolation buffer interface between the barrel 4 and the casing 2. In one embodiment, the first buffer member 30 is a smooth surface; in another embodiment, in order to enhance its isolation and buffering properties, a plurality of convex points may be arranged at intervals on the outer surface of the first buffer member. In addition, the first buffer member 30 may only cover part of the outer surface of the barrel 4, or may cover the entire outer surface of the barrel 4, or may cover the front end face and the rear end face of the barrel 4, but is not limited thereto.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4 and Fig. 8-6, the cylinder 4 includes an outer ring portion 40, an inner ring portion 41, and a plurality of first connecting leaves 42 connecting the outer ring portion 40 and the inner ring portion 41, wherein the inner ring portion 41 is shorter than the outer ring portion 40, and the inner ring portion 41 is located at the inner side corresponding to the front end portion of the outer ring portion 40, and the front end of the inner ring portion 41 exceeds the front end of the outer ring portion 40 forward. A base plate 44 is provided in the inner ring portion 41, and a hollow shaft cylinder 45 protrudes backward from the base plate 44. The motor 5 includes a stator assembly 51 and a rotor assembly, wherein the stator assembly 51 and the rotor assembly are nested and fixed, and fixed to the shaft cylinder 45 from the rear, and the fan 6 is installed at the rear side of the rotor assembly. The motor 5 further includes a driving plate 52. The front end of the inner ring portion 41 is provided with a receiving portion 46 and a buckle 47. The receiving portion 46 is used to receive the driving plate 52, and the buckle 47 is used to buckle and fix the driving plate 52. The base plate 44 is provided with a wire passing opening 440, and the wire passes through the wire passing opening 440 to electrically connect the driving plate 52 and the stator assembly 51. The driving plate 52 is electrically connected to the stator assembly 51, and drives the rotor assembly and the fan 6 to rotate.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4, Fig. 8-7 and Fig. 8-8, the rotor assembly includes a rotating shaft 501, a bearing 502 and a stopper 503, wherein the bearing 502, the stopper 503 and the stator assembly 51 are all inserted outside the rotating shaft 501. The shaft cylinder 45 extends backward beyond the rear end of the inner ring portion 41, but does not extend beyond the rear end of the outer ring portion 40. The rotating shaft 501 is inserted into the shaft cylinder 45 from back to front, and two bearings 502 are provided, one of which is clamped outside the rotating shaft 501 and inside the shaft cylinder 45 from back to front, and the other bearing 502 is clamped outside the rotating shaft 501 and inside the shaft cylinder 45 from front to back. The shaft cylinder 45 is provided with a second buffer (not shown, the same below) between the two bearings 502, and the inner diameter of the shaft cylinder 45 corresponding to the second buffer is smaller than the inner diameter of the shaft cylinder 45 corresponding to the bearing 502. A slot is provided radially outside the front of the rotating shaft 501, and the stopper 503 is fixed in the slot from front to back, and a third buffer 31 is provided between the front bearing 502 and the stopper 503. The second buffer and the third buffer 31 can effectively absorb and reduce the vibration between the rotating shaft 501 and the shaft cylinder 45, and the shock absorption effect is good.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4, Fig. 8-5 and Fig. 8-8, the rotor assembly further comprises a housing 504 and a magnetic ring 505, the housing 504 is open to the front, the housing 504 comprises a rear portion and a side portion, the magnetic ring 505 is fixed to the inner side of the side portion of the housing 504, and the stator assembly 51 is fixed to the inner side of the magnetic ring 505. In the radial direction, the stator assembly 51, the magnetic ring 505 and the side portion of the housing 504 are sleeved on the outer side of the shaft cylinder 45, and the front end of the side portion of the housing 504 and the inner ring portion 41 are arranged in close proximity in the axial direction. The interval between the side portion of the housing 504 and the rear end of the inner ring portion 41 is smaller than the interval between the rear portion of the housing 504 and the rear bearing 502, so that even if the portable fan falls or is hit by other external impacts, the rear portion of the housing 504 will not impact and damage the rear bearing 502. The distance between the side of the casing 504 and the rear end of the inner ring portion 41 is smaller than the distance between the front end of the rotating shaft 501 and the rear end of the driving plate 52, so that even if the portable fan falls or is hit by other external impacts, the front end of the bearing 502 will not hit and damage the driving plate 52.

In one embodiment, as shown in Fig. 8-2, Fig. 8-4, Fig. 8-5 and Fig. 8-8, the outer diameter of the cylinder 4 is 23.71-24.05 mm, the length of the cylinder 4 is 30-33.05 mm, and the volume of the cylinder 4 is small, so that the overall volume of the portable fan can also be small, thereby improving the portability of the portable fan. The cylinder 4 also includes a plurality of extension leaves 43, which correspond to the first connecting leaves 42 one by one, and extend backward from the first connecting leaves 42 to form the extension leaves 43. The first connecting leaves 42 extend vertically forward, and the extension leaves 43 extend in an arc shape, and the plurality of extension leaves 43 surround the outside of the side of the housing 504.

In one embodiment, as shown in Fig. 8-3, Fig. 8-4, Fig. 8-5 and Fig. 8-8, the fan 6 is fixedly arranged at the rear end of the rotating shaft 501, and the front end of the fan 6 is arranged closely to the rear end of the casing 504 in the axial direction. The fan 6 is arranged coaxially with the motor 5, and the fan 6 and the casing 504 are arranged closely, so there is no need to provide an additional transmission device between the motor 5 and the fan 6, which effectively improves the transmission efficiency of the fan 6. The fan 6 includes a hub 60 and a plurality of blades 61 arranged on the outside of the hub 60, and rib blades 62 are arranged on the inner side of the hub 60. A notch is penetrated at the rear of the casing 504, and the fourth buffer member 32 passes through the notch at the rear of the casing 504, and is arranged between the bearing 502 at the rear and the rib blades 62 of the fan 6. The rear end of the fourth buffer member 32 abuts against the rib blades 62, and the The front end of the fourth buffer member 32 abuts against the bearing 502 at the rear, and the fourth buffer member 32 effectively absorbs and reduces the vibration of the fan 6 rotating at a high speed, and has a good shock absorption effect.

In one embodiment, as shown in Fig. 8-4, Fig. 8-5 and Fig. 8-8, a fifth buffer (not numbered, the same below) is sleeved on the outer side of one of the two bearings 502; in another embodiment, the outer sides of the two bearings 502 are sleeved with fifth buffers, and both are arranged in the shaft cylinder 45; in another embodiment, the outer sides of the two bearings 502 are sleeved with fifth buffers, the front bearing 502 is arranged in the shaft cylinder 45, and the rear bearing 502 is not arranged in the shaft cylinder 45, but directly arranged in the rotor assembly. The fifth buffer effectively absorbs and reduces the vibration of the high-speed rotation of the bearing 502, and has a good shock absorption effect.

In one embodiment, as shown in FIG. 8-3 to FIG. 8-5, the fan 6 is a diagonal flow fan 6, the hub 60 radially increases and extends from the back to the front, and the hub 60 is arc-shaped. The diameter of the hub 60, the diameter of the housing 504, and the diameter of the inner ring portion 41 are less than 0.5 mm apart from each other, and in the axial direction, the housing 504 and the inner ring portion 41 are arranged closely spaced from front to back, and the hub 60 and the housing 504 are arranged closely. The rear end of the fan 6 does not extend backward beyond the rear end of the outer ring portion 40, and the fan 6 can be completely arranged in the four-layer structure of the outer ring portion 40, the first buffer 30, the casing 2, and the outer shell 1, which can effectively absorb and reduce the noise of the high-speed rotation of the fan 6. It should be understood that the channel between the inner ring portion 41 and the outer ring portion 40, and the channel between the side of the housing 504 and the outer ring portion 40 belong to the air duct of the portable fan. The fan 6 rotates, and the high-speed rotating blades 61 generate high-speed turbulence, which first flows through the bent and extended extension blades 43 to be initially combed, then flows through the first connecting blades 42 extending vertically forward to be combed again, and is guided to be ejected vertically forward to reduce kinetic energy loss and retain large air volume and high wind pressure.

In one embodiment, as shown in FIG. 8-2 to FIG. 8-5, the air outlet 100 further includes a first deflector 7 and a second deflector 8, wherein the first deflector 7 is fixed to the rear side of the casing 2 and is arranged at the rear side of the outer shell 1. The second deflector 8 is fixed to the front side of the casing 2 and is arranged at the front side of the outer shell 1. A first fixing portion 21 is provided at the front side of the casing 2, and a first matching portion 70 is provided at the outer side of the second deflector 8, and the first fixing portion 21 and the first matching portion 70 are fixed in a corresponding manner. A second fixing portion 22 is provided at the rear side of the casing 2, and the first deflector 7 is provided with a second matching portion 80, and the second fixing portion 22 and the second matching portion 80 are fixed in a corresponding manner.

In one embodiment, as shown in Figures 8-2 to 8-5, the axial length of the housing 1 is 53.6-54 mm, a first spacing is provided between the rear end of the first deflector 7 and the rear end of the hub 60, a second spacing is provided between the front end of the second deflector 8 and the front end of the hub 60, and the first spacing is smaller than the second spacing, so that the airflow has sufficient air inlet distance and air outlet distance, and a guide, rectifying, and pressurizing structure is provided in the air inlet distance and the air outlet distance, so as to ensure that the portable fan can increase the air volume, wind pressure, and wind efficiency even when the volume is limited.

In one embodiment, as shown in Fig. 8-2, Fig. 8-3, Fig. 8-4 and Fig. 8-9, the first deflector 7 comprises a rear shell 71, a fairing 72, a housing 73 and a fastener 74, wherein the fastener 74 fixes the rear shell 71 and the housing 73, and the rear shell 71, the housing 73 and the fairing 72 are all located at the rear side of the hub 60. The rear shell 71 is hollow, and a protrusion 710 and a first fixing hole 714 are provided at the front end of the rear shell 71. A housing 721 is provided at the edge of the fairing 72, and the housing 721 cooperates with the protrusion 710, and the fairing 72 covers the radial inner side of the rear shell 71. A second fixing hole 730 is provided at the rear end of the housing 73, and the fastener 74 fixes the first fixing hole 714 and the second fixing hole 730, and the rear shell 71 and the housing 73 clamp the fairing 72. The fairing 72 includes a plurality of air inlet holes 720, and the thickness of the fairing 72 is 0.4 mm. The rear shell 71 includes a plane portion 711, a radial guide portion 712 and an axial guide portion 713 which are connected in sequence in a radial direction. The front end of the axial guide portion 713 is provided with a first step portion, and the first step portion is convexly provided with the protrusion 710. The edge of the fairing 72 is provided at the first step portion, and the clamping hole 721 cooperates with the protrusion 710. The rear end of the clamping shell 73 is arranged corresponding to the first step portion to clamp the fairing 72 with the first step portion. The radial guide portion 712 is an arc surface, and radially decreases from the plane portion 711 to the axial guide portion 713. The minimum inner diameter of the plane portion 711 is greater than the inner diameter of the axial guide portion 713. The inner side surface of the axial guide portion 713 extends forward substantially radially unchanged, and the inner side surface of the clamping shell 73 extends forward substantially radially unchanged. Of course, the inner side surface of the axial guide portion 713 and the inner side surface of the jamming shell 73 can also be radially tapered and extended forward with a very small amplitude. The airflow is introduced from the arc-shaped radial guide portion 712, and the inner side surface of the axial guide portion 713 and the inner side surface of the jamming shell 73 remain unchanged in radial direction, so that the airflow encounters less resistance and generates less turbulence, which can reduce the noise generated by airflow disturbance and help guide the airflow to flow forward. Under the condition that the overall volume of the portable fan is limited, the air volume and wind pressure are increased. At the same time, the fairing 72, which has a thickness and a plurality of air inlet holes 720, can organize the airflow well, so that the airflow can be more gathered and smoothly enter the portable fan.

In one embodiment, as shown in Figures 8-3 to 8-5, the minimum inner diameter of the plane portion 711 is R1, and the distance between the plane portion 711 and the rear end of the hub 60 is D1, 0.5R<D1<R1<2D1; the inner diameter of the axial guide portion 713 is R2, and the distance between the rear end of the axial guide portion 713 and the rear end of the hub 60 is D2, 0.5R2<D2<R2<2D2. Too large D1 and D2 will affect the layout distribution of the portable fan, while too small D1 and D2 will increase the intake loss of the portable fan and affect the performance of the portable fan. Therefore, by determining the numerical range of D1 and D2 corresponding to the numerical values of R1 and R2, an excellent intake length can be designed, so that the airflow encounters less resistance, generates less turbulence, increases the air volume, wind pressure and wind efficiency, and reduces the noise of the air intake.

In one embodiment, as shown in FIG8-2 to FIG8-5, the second deflector 8 includes an outer cover portion 81, an inner cover portion 82, and a plurality of second connecting blades 83 connecting the outer cover portion 81 and the inner cover portion 82, and the air outlet of the portable fan is formed between the outer cover portion 81 and the inner cover portion 82. The second connecting blade 83 is spaced more than 3.5 mm from the first connecting blade 42 in the axial direction. It should be understood that the first connecting blade 42 and the second connecting blade 83 are both stationary blades, and double stationary blades are used instead of general stationary blades, and there is also a gap between the double stationary blades, so that the airflow The double static blades will ensure that there is enough buffer space, which will not cause part of the airflow to rebound, and can prevent the generation of turbulence, thereby reducing noise.

In one embodiment, as shown in Fig. 8-2 to Fig. 8-5, the front end of the outer cover part 81 is in front of the front end of the inner cover part 82, the rear end of the inner cover part 82 is open, the front end is sealed, and the front end of the inner cover part 82 is formed with a negative pressure surface 820 that is recessed backwards, and the negative pressure surface 820 has the effect of gathering and replenishing wind, so that the wind blown out from the air outlet is more concentrated and strong, and the blowing distance is farther. The outer side surface of the inner cover part 82 first radially increases and extends from the back to the front and then radially decreases and extends, and the radially increased portion of the outer side surface of the inner cover part 82 is longer than the radially decreased portion of the outer side surface of the inner cover part 82, and the diameter of the front end of the inner cover part 82 is greater than the diameter of the rear end of the inner cover part 82. The front end of the inner ring part 41 is open, and the front end of the inner ring part 41 is provided with a driving plate 52, which is convenient for installing the driving plate 52 and is conducive to connecting the driving plate 52 with the wire. The rear end of the inner cover portion 82 is disposed adjacent to the front end of the inner ring portion 41 to shield and protect the drive plate 52 and reduce dust and impurities from entering the drive plate 52 to affect normal use.

In one embodiment, the thickness of the second deflector 8 in the axial direction is 12.7-12.82 mm, which is conducive to enhancing wind pressure and making the air outlet distance farther. The front end of the housing 1 is protruding with a second step portion, and the front end of the outer cover portion 81 first expands and extends radially forward and outward, then bends and extends backward and wraps the second step portion, thereby strengthening the fit and fixation between the second deflector 8 and the housing 1.

In one embodiment, as shown in Fig. 8-1, Fig. 8-2 and Fig. 8-4, the length of the housing 1 in the axial direction is 53.6-54 mm, at least part of the first deflector 7 is disposed inside the housing 1, at least part of the second deflector 8 is disposed inside the housing 1, and the distance between the rear end of the first deflector 7 and the front end of the second deflector 8 is 59.6-60 mm. The air outlet 100 is compact in size and easy to carry.

In one embodiment, as shown in Fig. 8-1, Fig. 8-2, Fig. 8-3, Fig. 8-4 and Fig. 8-8, a power supply 209 and a control panel 210 are provided in the handheld part 200, and the air outlet 100 and the handheld part 200 are fixed. The housing 1 is provided with a notch 10 corresponding to the handheld part 200, and a first fool-proof block 11 is provided in front of the notch 10 on the inner side of the housing 1. The inner cover part 82 and the inner ring part 41 are arranged adjacent to each other in the axial direction, and a fool-proof hole 23 is provided on the front side of the sleeve 2. One of the second connecting leaves 83 is provided with a wire groove 830, and the wire groove 830 radially passes through the inner cover part 82 and the outer cover part 81, and a second fool-proof block 810 is provided on the outer side of the outer cover part 81 corresponding to the wire groove 830. The sleeve 2 is inserted into the outer shell 1 from back to front, the first anti-foolproof block 11 and the second anti-foolproof block 810 are both matched with the anti-foolproof hole 23, the missing groove 10, part of the anti-foolproof hole 23 and the wire groove 830 are connected, and the wire passes through the missing groove 10, the anti-foolproof hole 23 and the wire groove 830 to electrically connect the control board 210 and the drive board 52.

In one embodiment, as shown in Fig. 8-1 to Fig. 8-4, the housing of the handheld part 200 includes a left shell 201 and a right shell 202 that match each other, and the air outlet 100 also includes a mounting frame 9 protruding from the outer surface of the housing 1. A connecting frame 203 is provided inside the handheld part 200, and the connecting frame 203 includes a connecting top plate 204, and a front mounting portion 205, a rear mounting portion 206, a left mounting portion 207 and a right mounting portion 208 extending downward from four sides of the connecting top plate 204. The connecting top plate 204 is fixedly connected with the mounting frame 9, the left shell 201 is fixedly connected with the left mounting portion 207, the right shell 202 is fixedly connected with the right mounting portion 208, and the boss of the right shell 202 is inserted into the front mounting portion 205 and the rear mounting portion 206, and the control board 210 is clamped at the bottom of the connecting frame 203. The handheld part 200 further includes a switch 211 electrically connected to the front side of the control panel 210, an interface 212 electrically connected to the rear side of the control panel 210, and an anti-mistaken touch device 213 electrically connected to the side of the control panel 210. The switch 211 is exposed to the front side of the handheld part 200, the interface 212 is provided on the rear mounting part 206 and is exposed to the rear side of the handheld part 200, and the anti-mistaken touch device 213 is exposed to the left or right side of the handheld part 200. The power supply 209 is provided below the control panel 210 and is electrically connected to the control panel 210. The power supply 209 can directly supply power to the motor 5 to drive the fan 6 to rotate without connecting to an external power source.

In one embodiment, a sixth buffer member (not shown, the same below) is provided on the rear side of the negative pressure surface 820 , and the sixth buffer member is used for pressurizing and connecting the drive plate 52 and the control plate 210 , and can absorb the noise generated by the operation of the motor 5 .

It should be understood that the first buffer 31, the second buffer, the third buffer 32, the fourth buffer 33, the fifth buffer and the sixth buffer are all elastic, but the specific material and form can be selected from existing elastic materials, for example, the first buffer 31 can be a silicone material or a foam material; the second buffer, the third buffer 32, the fourth buffer 33 and the fifth buffer can be a spring material or a silicone material; the sixth buffer can be a silicone material or a foam material. The specific elastic material is not limited to the above examples, as long as it is elastic and can provide a buffering and shock absorbing effect.

Scheme 10 is shown in Figures 9-1 to 9-7.

A buffer of a fan module provided in an embodiment of the utility model is shown in Figures 9-1 to 9-7. Figure 9-1 is a schematic diagram of the structure of a buffer 1 of a fan module provided in an embodiment of the utility model. Figure 9-2 is a schematic diagram of the structure of a buffer body 11 in a buffer of a fan module provided in an embodiment of the utility model. Figure 9-3 is a schematic diagram of the structure of a limiter 123 in a buffer of a fan module provided in an embodiment of the utility model. Figure 9-4 is a schematic diagram of the structure of an auxiliary buffer 12 in a buffer of a fan module provided in an embodiment of the utility model. Figure 9-5 is a schematic diagram of the structure of a fan module 2 provided in an embodiment of the utility model. Figure 9-6 is a schematic diagram of the structure of a handheld fan provided in an embodiment of the utility model. Figure 9-7 is a schematic diagram of the cross-sectional structure along the AA direction in Figure 9-6. A buffer of a fan module provided in an embodiment of the utility model includes a buffer body 11 and an auxiliary buffer 12. The buffer body 11 is sleeved on the outside of the fan module 2, and the auxiliary buffer 12 is sleeved on the outside of the fan module 2. 12 is arranged on the buffer body 11, the fan module 2 is located inside the buffer body 11, the auxiliary buffer 12 is located outside the buffer body 11, the auxiliary buffer 12 is used to be close to the support shell 3, and the auxiliary buffer 12 protrudes from the buffer body 11 towards the direction close to the support shell 3.

The interior of the buffer body 11 has a space for accommodating the fan module 2 , and the exterior of the buffer body 11 has a space for accommodating the auxiliary buffer 12 .

The auxiliary buffer 12 and the buffer body 11 may be made of elastic materials such as silicone.

In this embodiment, the buffer body 11 is arranged outside the fan module, and the auxiliary buffer 12 is arranged on the buffer body 11. In this way, during the operation of the fan module 2, the auxiliary buffer 12 located on the buffer body 11 sleeved outside the fan module 2 can achieve shock absorption and buffering, and after buffering the vibration generated during the operation of the fan module 2, the stability of the operation can be improved, which is conducive to reducing noise. Thus, the technical effect of reducing noise while reducing shock is achieved, which is conducive to improving the stability of the operation.

As an embodiment, referring to FIGS. 9-1 to 4 , the auxiliary buffer 12 at least includes a plurality of first protrusion groups 121 distributed along the circumferential direction on the outside of the buffer body 11, and the plurality of first protrusion groups 121 are arranged in the middle section 111 of the buffer body 11, and the middle section 111 refers to the area between the two ends of the buffer body 11, and the area has space for accommodating the plurality of first protrusion groups 121. The circumferential distribution of the plurality of first protrusion groups 121 along the buffer body 11 means that, as shown in FIG. 9-7 , each first protrusion group 121 on the buffer body 11 is distributed from left to right, and each first protrusion group 121 presents a circular shape that is the same as the outer circumference of the buffer body 11. The multiple groups of first protrusion groups 121 may include 1 group of first protrusion groups 121, 2 groups of first protrusion groups 121, 3 groups of first protrusion groups 121, 4 groups of first protrusion groups 121, etc. The multiple groups of first protrusion groups 121 are evenly spaced along the circumference of the buffer body 11 on the outside of the buffer body 11, that is, the spacing between each two connected groups of first protrusion groups 121 on the outside of the buffer body 11 is equal. By arranging multiple groups of first protrusion groups 121 in the middle section 111 of the buffer body 11, the multiple groups of first protrusion groups 121 can effectively buffer the vibration generated in the middle section 111 of the buffer body 11 when the fan module 2 is running.

As an embodiment, the first protrusion group 121 includes a plurality of protrusions 1211, and the plurality of protrusions 1211 are distributed at equal intervals, and the protrusions 1211 are truncated cone-shaped. The plurality of protrusions 1211 include 1 protrusion 1211, 2 protrusions 1211, 3 protrusions 1211, 4 protrusions 1211, etc., and the plurality of protrusions 1211 can be annular on the outside of the buffer body 11. The protrusions 1211 are truncated cone-shaped, and the protrusions 1211 are in contact with the inner wall of the support shell 3, and shock absorption and buffering can be achieved through the plurality of protrusions 1211.

In some embodiments, the auxiliary buffer 12 further includes two groups of second protrusion groups 122, one group of second protrusion groups 122 is arranged at one end of the buffer body 11, and the other group of second protrusion groups 122 is arranged at the other end of the buffer body 11, and the plurality of groups of the above-mentioned first protrusion groups 121 are all located between the two groups of second protrusion groups 122, that is, the two groups of second protrusion groups 122 are respectively located at the openings at both ends of the buffer body 11. Both groups of second protrusion groups 122 are distributed along the circumference of the buffer body 11, that is, the second protrusion groups 122 are annular. By respectively arranging the second protrusion groups 122 at both ends of the buffer body 11, the second protrusion groups 122 can effectively buffer the vibration generated at both ends of the buffer body 11 when the fan module 2 is running.

As an embodiment, the second protrusion group 122 includes a plurality of bosses 1221, which are distributed at equal intervals and are tapered. The plurality of bosses 1221 may refer to one boss 1221, two bosses 1221, three bosses 1221, four bosses 1221, etc. The cross section of the boss 1221 in the direction away from the buffer body 11 gradually decreases, and after the boss 1221 contacts the inner wall of the support shell 3, shock absorption and buffering can be achieved through the plurality of bosses 1221.

In some embodiments, the length of the second protrusion group 122 in the radial direction along the buffer body 11 is equal to the length of the first protrusion group 121 in the radial direction along the buffer body 11. At this time, the height of each protrusion 1211 in the first protrusion group 121 is the same, the height of each boss 1221 in the second protrusion group 122 is the same, and the height of the boss 1221 is the same as the height of the protrusion 1211. That is, assuming that in the radial direction of the buffer body 11, the length of the boss 1221 is H1, and the length of the protrusion 1211 is H2, then H1=H2. At this time, the protrusion 1211 and the boss 1221 are in contact with the inner wall of the support shell 3. When the fan module 2 generates vibration during operation and pushes the protrusion 1211 and the boss 1221 close to the inner wall of the support shell 3, after the protrusion 1211 and the boss 1221 are constrained by the inner wall of the support shell 3, the deformation degree of the protrusion 1211 and the boss 1221 is the same, and a better shock-absorbing and buffering effect will be achieved.

As an embodiment, please refer to Figure 9-3, the buffer 1 also includes two limit members 123, the two limit members 123 are arranged inside the buffer body 11, and the two limit members 123 are respectively located at the two ends of the fan module 2, that is, the two limit members 123 limit the fan module 2 from both ends of the fan module 2, so that when the fan module 2 is running, the buffer body 11 is firmly mounted on the fan module 2 to avoid horizontal displacement of the buffer body 11 mounted on the fan module 2.

As an implementation mode, the embodiment of the utility model further provides a fan module, which includes the above-mentioned buffer component, and also includes an air guide component 4 and an air inlet bracket 5, and the buffer component body 11 is located between the air guide component 4 and the air inlet bracket 5.

In this embodiment, the buffer body 11 is arranged between the air guide 4 and the air inlet bracket 5. During the shock absorption and buffering process of the auxiliary buffer 12 arranged on the buffer body 11, the gas moves from the air inlet bracket 5 in the direction toward the air guide 4, and the air guide 4 and the air inlet bracket 5 clamp the buffer body 11 from both sides of the buffer body 11. Therefore, during the operation, the vibration generated during the operation can be buffered, which is conducive to reducing noise and improving the technical effect of stability during operation.

In some embodiments, the projection of the buffer body 11 on the air guide 4 along the length extension direction of the buffer body 11 is located on the air guide 4, and at this time, the air guide 4 and one end of the buffer body 11 abut against each other. The projection of the buffer body 11 on the air inlet bracket 5 along the length extension direction of the buffer body 11 is located on the air inlet bracket 5, and at this time, the air inlet bracket 5 and one end of the buffer body 11 abut against each other. By clamping the two ends of the buffer body 11 by the air inlet bracket 5 and the air guide 4, it is possible to prevent the buffer body 11 from having a large displacement.

In some embodiments, as shown in FIGS. 9-5 to 9-7 , at least a portion of the air guide 4 extends into the interior of the support shell 3, and at least a portion of the air inlet bracket 5 extends into the interior of the support shell 3. That is, one end of the support shell 3 is sleeved on a portion of the air guide 4, and the other end of the support shell 3 is sleeved on a portion of the air inlet bracket 5, and the air guide 4 and the air inlet bracket 5 are limited by the two ends of the support shell 3, respectively.

As an implementation mode, the utility model embodiment also provides a handheld fan, which includes the above-mentioned fan module and also includes a handheld part 6. The above-mentioned support shell 3 is provided with a mounting port 31, and the mounting port 31 can be located at the bottom of the support shell 3. The handheld part 6 is used for the user to hold. One end of the connecting bracket 61 in the handheld part 6 extends into the interior of the mounting port 31, and the connecting bracket 61 extending into the interior of the mounting port 31 is tightly attached to the above-mentioned auxiliary buffer 12. One end of the connecting bracket 61 extending into the mounting port 31 can present a curved surface that matches the buffer body 11, so that this part of the connecting bracket 61 is in close contact with the auxiliary buffer 12.

In this embodiment, one end of the connecting bracket 61 in the handheld portion 6 extends into the interior of the mounting opening 31 in the support shell 3, and the other end of the connecting bracket 61 is closely attached to the auxiliary buffer 12. The user holds the handheld portion 6, and the connecting bracket 61 provides support for the buffer body 11 and the auxiliary buffer 12. The vibration of the buffer body 11 and the auxiliary buffer 12 is transmitted to the handheld portion 6 through the connecting bracket 61, thereby achieving the purpose of buffering the vibration generated by the fan module during operation, which is beneficial to improving the stability of operation and the technical effect of noise reduction.

Scheme 11 is shown in Figures 10-1 to 10-8.

Please refer to Figures 10-1 and 2. Figure 10-1 is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 10-2 is a schematic diagram of the position structure of the grip and fan assembly of this embodiment.

As shown in Figures 10-1 and 10-2, a portable fan includes: a holding portion 1; a blowing portion 2, which is connected to one end of the holding portion 1 and is provided with an air inlet 21 and an air outlet 22; a fan assembly 3, which is arranged in the blowing portion 2 and is used to push the air flow from the air inlet 21 to the air outlet 22; the holding portion 1 is provided with a first end 11 and a second end 12 opposite to the first end 11 along the direction from the air inlet 21 to the air outlet 22, and the fan assembly 3 is arranged in a space defined by extension lines L1 and L2 of the first end 11 and the second end 12 toward the blowing portion 2.

In this embodiment, the grip portion 1 is constructed as a cuboid, and the side joints of the grip portion 1 are smoothly transitioned by rounded corners. However, the overall structure of the grip portion 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the grip portion 1 is constructed as a cylinder, a polygonal column, a cube, a cartoon figure, etc. (not limited to).

In this embodiment, the blowing part 2 is configured to be cylindrical. However, the configuration of the blowing part 2 is not limited thereto, and according to different specific application scenarios, in some embodiments, the blowing part 2 can be configured to be (not limited to): prism, barrel, polygon, racetrack, etc.

Please refer to FIG. 10-3 , which is a schematic diagram of the structure of the fan assembly of this embodiment.

As shown in FIG. 10-3 , the fan assembly 3 in this embodiment includes: a fan blade 32 and a fan motor 31. A connecting ring is provided inside the blowing portion 2 for fixing the fan assembly 3. The fan blade 32 and the fan motor 31 are integrated in a spatial structure reuse manner. However, the structure of the fan blade 32 and the fan motor 31 is not limited to, in some embodiments, the fan blade 32 and the fan motor 31 can be a split structure, that is, the fan blade 32 and the fan motor 31 are connected only by a rotating shaft.

In some embodiments, the fan assembly 3 further includes: a fan housing 33, the fan blades 32 and the fan motor 31 are both disposed in the fan housing 33, and the fan housing 33 encapsulates the fan blades 32 and the fan motor 31 into a standardized accessory. In this embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the fan housing 33, or refers to the distance from the top of the fan blade 32 to the tail of the fan motor 31.

In some embodiments, the fan assembly 3 further includes: a flexible protective cover 34, which is sleeved on the fan housing 33 and is used to increase the stability of the connection between the fan assembly 3 and the blowing part 2. At the same time, the flexible protective cover 34 also has a buffering effect, which can reduce the vibration and noise of the portable fan. In this embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the flexible protective cover 34.

In some embodiments, the surface of the flexible protective cover 34 is provided with dot-shaped protrusions 341 or annular protrusions (not shown). In some embodiments, the dot-shaped protrusions 341 and the annular protrusions are alternately provided. The dot-shaped protrusions 341 and/or the annular protrusions can enhance the buffering capacity of the flexible protective cover 34, further reduce the vibration and noise of the portable fan, and at the same time, facilitate the assembly of the fan assembly 3 into the blowing part 2.

In this embodiment, the first end 11 and the second end 12 actually represent the length of the three attribute parameters of the length, width and height of the holding portion 1. Structurally, the overall length of the fan assembly 3 is not greater than the length of the holding portion 1; in terms of positional relationship, the fan assembly 3 is disposed within the range defined by the vertical extension line of the first end 11 and the second end 12.

In the above-mentioned embodiment, the fan assembly 3 of the portable fan is arranged in the blowing part 2, and the fan assembly 3 is limited to be placed in the space of the extension line member of the first end 11 and the second end 12 of the holding part 1. That is, the length of the fan assembly 3 in the blowing direction is limited to be no greater than the length of the holding part 1 in the blowing direction. This construction method can make the center of gravity of the fan assembly 3 and the holding part 1 consistent, so that the portable fan has stronger stability when placed. Secondly, the portable fan will generate a recoil force during the blowing process. When the center of gravity of the fan assembly 3 and the holding part 1 are inconsistent, the portable fan will turn under the action of the recoil force. Therefore, the relative position relationship between the fan assembly 3 and the holding part 1 in this embodiment can also prevent the portable fan from deflecting when blowing.

Again, when the speed of the fan assembly 3 is high, for example, when the fan motor 31 of the fan assembly 3 is a three-phase motor, high-frequency vibration will be generated due to the high speed, and the high-frequency vibration will cause the vibration of the entire portable fan, and even cause the portable fan to resonate in certain scenarios. In this embodiment, the fan assembly 3 is limited between the first end and the second end of the grip 1, so that the high-frequency vibration generated by the fan assembly 3 cannot be directly transmitted to the grip 1, but is transmitted from the fan assembly 3 to the blowing part 2, and then from the blowing part 2 to the grip 1. The vibration wave will be attenuated during this transmission process, which greatly reduces the amplitude and energy of the vibration of the grip 1. When the energy attenuation is large, it will break the conditions for resonance, reduce the resonance risk of the portable fan, and improve the comfort of the portable fan. The use of a three-phase motor can make the fan motor 31 rotate at a higher speed, blow out a larger amount of air, and have a more obvious cooling effect.

However, the type of motor used by the fan motor 31 is not limited to a three-phase motor. In some embodiments, the fan motor 31 can also use a two-phase motor.

Please refer to FIG. 10-4 , which is a schematic diagram of the overall structure decomposition of the portable fan of this embodiment.

As shown in FIG. 10-4 , in some embodiments, the blowing portion 2 includes: a connecting tube 23 , the outer surface of the connecting tube 23 is smooth, the connecting tube 23 is connected to one end of the holding portion 1 , and the fan assembly 3 is disposed in the connecting tube 23 .

When the fan assembly 3 is in operation, the air near the connecting tube 23 will flow toward the air inlet 21 as the negative pressure at the air inlet 21 is formed. The outer surface of the connecting tube 23 is smooth, which can make the air flow smoother and will not form vortices due to obstruction during the flow process, thereby affecting the air intake of the portable fan. Therefore, the blowing efficiency of the portable fan can be improved.

The fan assembly 3 is fixed in the connecting tube 23. For example, the fan assembly 3 is fixed by a connecting ring that is hollowed out in the connecting tube 23, or the fan assembly 3 is fixed by a connecting rod that is arranged inside the fan assembly 3.

The connecting tube 23 can be directly connected to the holding portion 1 by means of (but not limited to): screws, gluing, clamping, welding or riveting.

In some embodiments, the connection between the connecting tube 23 and the holding portion 1 needs to be connected to the holding portion 1 through the connecting member 15, one end of the connecting member 15 is connected to the holding portion 1, and the other end of the connecting member 15 is connected to the connecting tube 23. The connection between the connecting tube 23 and the connecting member 15 is connected in a manner (not limited to): screws, adhesive, clamping, welding or riveting. The connecting tube 23 is directly connected to the holding portion 1 or connected through the connecting member 15, both of which are the connection between the connecting tube 23 and the holding portion 1.

In some embodiments, along the direction from the air inlet 21 to the air outlet 22, the ratio of the distance from the first end 11 to the second end 12 to the length of the fan assembly 3 is: 1.05-1.35. Within this ratio, the overall shape and blowing efficiency of the portable fan are optimal. When the ratio of the two is greater than 1.35, the ratio of the fan assembly 3 to the holding portion 1 begins to gradually become unbalanced, and the wind-driving ability of the too-small fan assembly 3 decreases. When the ratio of the two is less than 1.05, the ratio of the fan assembly 3 to the holding portion 1 gradually becomes unbalanced. Due to the uneven mass distribution of the fan assembly 3 itself, when the fan assembly 3 gradually becomes larger, its center of gravity distribution will be offset, resulting in insufficient stability of the portable fan. An overly large fan assembly 3 will also cause the entire portable fan to become "top-heavy" and lose its balance ability.

In some embodiments, a counterweight is provided in the grip portion 1 to keep the portable fan stable when placed. The counterweight is usually a battery 14, but the object is not limited thereto. Depending on the specific application scenario, in some embodiments, the counterweight is a counterweight made of metals such as lead, copper, iron, or a compound or mixture of the above metals. The counterweight and the battery 14 can also serve as the counterweight of the grip portion 1.

The setting of the counterweight can further improve the placement stability of the holding portion 1, lower the center of gravity of the portable fan, and prevent it from tipping over.

The blowing portion 2 is arranged from the first end 11 to the second end 12, and the length of the blowing portion 2 is greater than the distance from the first end 11 to the second end 12. The fan assembly 3 is arranged in the blowing portion 2, and the length of the blowing portion 2 is greater than the distance from the first end 11 to the second end 12, that is, the length of the blowing portion 2 is greater than the length of the holding portion 1. When the length of the blowing portion 2 is greater than the length of the holding portion 1, the airflow has a certain beam space when entering the blowing portion 2 and flowing out of the blowing portion 2, which can make the airflow entering the fan assembly 3 mixed, so that it has a uniform flow direction and flow speed; similarly, the airflow flowing out of the blowing portion 2 can also be mixed, so that it has a uniform flow direction and flow speed, thereby improving the blowing efficiency of the portable fan as a whole.

Furthermore, when the fan assembly 3 is working, a negative pressure wind zone will be formed around the air inlet 21, and a positive pressure wind zone will be formed in the air outlet 22. The negative pressure wind zone at the air inlet 21 will cause the surrounding airflow to converge to the air inlet 21. If the length of the blowing part 2 is too short, so that the air inlet 21 is flush with the holding part 1 or inside the holding part 1, when the surrounding airflow converges, the holding part 1 itself will become an obstacle to the flow of airflow, causing turbulence or vortex in the flowing airflow, reducing the air intake efficiency. When the length of the blowing part 2 is greater than the length of the holding part 1, there is a gap between the air inlet 21 and the holding part 1, and the holding part 1 no longer becomes an obstacle for the surrounding airflow to flow to the air inlet 21, which greatly improves the air intake efficiency of the portable fan. The positive pressure wind area formed by the air outlet 22 will cause the airflow around the air outlet 22 to flow in all directions. If the length of the blowing part 2 is too short, so that the air outlet 22 is flush with the holding part 1 or inside the holding part 1, the airflow blown out of the air outlet 22 will flow along the holding part 1 due to the wall attachment effect, reducing the air outlet efficiency, or the airflow blown out of the air outlet 22 will collide with the holding part 1 and generate a cyclone, which also reduces the air outlet efficiency. When the length of the blowing part 2 is greater than the length of the holding part 1, there is a gap between the air outlet 22 and the holding part 1, which can prevent the airflow from colliding with the holding part 1 or generating the wall attachment effect, greatly improving the air outlet efficiency of the portable fan.

In some embodiments, the ratio of the length of the blowing portion 2 to the distance from the first end 11 to the second end 12 is 1.1-1.5. Within this ratio, the air intake and air outlet efficiency of the portable fan is optimal. When the ratio of the two is greater than 1.5, the proportion of the blowing portion 2 and the holding portion 1 is unbalanced. The excessively long air outlet makes the distance from the air inlet 21 to the fan assembly 3 too long, and the air intake mixed flow space is too large. The excessively long air outlet increases the contact area between the airflow and the inner wall space of the blowing portion 2, resulting in high air intake noise. The excessively long air outlet also makes the distance from the fan assembly 3 to the air outlet 22 too long, which also leads to high air outlet noise and low air outlet efficiency. When the ratio of the two is less than 1.1, the excessively short air outlet If the distance between the air inlet 21 and the fan assembly 3 is too short, the airflow entering therein cannot be well beamed, causing more turbulence in the airflow entering the fan blades 32, affecting the efficiency of the fan blades 32. If the air outlet is too short, the distance between the air outlet 22 and the fan assembly 3 is too short, and the airflow blown out of the air outlet 22 is too dispersed and has poor directionality.

The distance from the first end 11 to the second end 12 is greater than the thickness of the grip 1 in the direction perpendicular to the first end 11 to the second end 12. That is, from the perspective of "length, width and height", the length of the grip 1 is greater than the width of the grip 1. This shape combined with the barrel-shaped blowing part 2 makes the overall shape of the portable fan more coordinated.

Please refer to FIG. 10-5 , which is a schematic diagram of an exploded view of the assembly tube and the fan assembly of this embodiment.

As shown in FIG10-5 , in some embodiments, the blowing unit 2 further includes: an assembly cylinder 24, which is disposed in the connecting cylinder 23, and the fan assembly 3 is disposed in the connecting cylinder 23. The assembly cylinder 24 is disposed in the connecting cylinder 23, and the assembly cylinder 24 is connected to the fan assembly 3.

In some embodiments, the assembly tube 24 and the connection tube 23 are made of different materials. For example, the connection tube 23 is made of metal material, while the assembly tube 24 is made of plastic material. The material of the assembly tube 24 is more plastic. Therefore, the assembly tube 24 and the connection tube 23 are manufactured separately, which can greatly improve the assembly efficiency and external aesthetics of the portable fan. It can ensure that the outer surface of the connection tube 23 is smooth and easy to grasp.

However, the relationship between the assembly cylinder 24 and the connecting cylinder 23 is not limited to this. Depending on the specific application scenario, the assembly cylinder 24 and the connecting cylinder 23 can be made of the same material through integrated processing and manufacturing technology. In this embodiment, the assembly cylinder 24 and the connecting cylinder 23 should be distinguished based on the function of the overall component, rather than by whether the component is independent.

Please refer to Figures 10-6 to 10-8, Figure 10-6 is a schematic diagram of the structure of the assembly tube of this embodiment; Figure 10-7 is a schematic diagram of the structure of the connection tube of this embodiment; Figure 10-8 is a schematic diagram of the structure of the air inlet ring of this embodiment.

As shown in Figures 10-6 to 10-8, in some embodiments, the blowing part 2 also includes: an air inlet tube 26 and an air outlet tube 25, the air inlet 21 is opened on the air inlet tube 26, the air outlet 22 is opened on the air outlet tube 25, and the air inlet tube 26 and the air outlet tube 25 are respectively clamped and connected to the two ends of the assembly tube 24.

The air inlet tube 26 and the air outlet tube 25 are respectively arranged at both ends of the assembly tube 24, and can clamp the connecting tube 23 to prevent the assembly tube 24 from falling from the connecting tube 23. The air inlet tube 26 and the air outlet tube 25 are fixed by a clamping method, which facilitates the assembly and disassembly of the air inlet tube 26 and the air outlet tube 25.

The surface of the air inlet tube 26 is raised to form a plurality of connection retaining edges 261a, and two adjacent connection retaining edges 261a are connected by a first connection spring piece 261b, and a first claw 261c is provided on the side of the first connection spring piece 261b facing the connection tube 23, and a first buckle 241 that cooperates with the first claw 261c is provided on the surface of one end of the assembly tube 24 connected to the air inlet tube 26. The setting of the connection retaining edges 261a reduces the overall volume of the air inlet tube 26, and less material is required to make the air inlet tube 26. The space between the two connection retaining edges 261a can also be used to set the first claw 261c, so that the first claw 261c has space for compression deformation. This method cleverly utilizes the surface space of the air inlet tube 26, makes the connection between the air inlet tube 26 and the assembly tube 24 more clever, and improves the space utilization rate.

The surface of the air outlet cylinder 25 facing the connecting cylinder 23 is indented to form a plurality of first slots 251, and a plurality of first openings 242 are correspondingly provided at one end of the assembly cylinder 24 facing the air outlet cylinder 25, and a second connecting elastic piece 243 is provided in each of the plurality of first openings 242, and a second claw 244 cooperating with the first slot 251 is provided on the side of the second connecting elastic piece 243 facing the fan assembly 3. Similarly, the connection method between the assembly cylinder 24 and the air outlet cylinder 25 is to cleverly open the first opening 242 on the surface of the assembly cylinder 24, and to open the second connecting elastic piece 243 at the position of the first opening 242, so that the assembly cylinder 24 can be connected with the air outlet cylinder 25 without providing a protruding structure, which reasonably utilizes the space structure and improves the space utilization rate of the assembly.

It should be pointed out that the connection method between the air inlet duct 26 and the air outlet duct 25 and the assembly duct 24 is not limited to this. Depending on the specific application scenario, the connection method between the air inlet duct 26 and the air outlet duct 25 and the assembly duct 24 can be (not limited to): gluing, screw connection, riveting, etc.

In some embodiments, the assembly cylinder 24 and the air inlet cylinder 26 or the air outlet cylinder 25 can be manufactured using an integrated manufacturing technology.

In some embodiments, the length of the first inner surface 262b of the end of the air inlet 26 facing away from the fan assembly 3 is less than the length of the first outer surface 262a, and the first inner surface 262b and the first outer surface 262a are smoothly transitioned to form a first arcuate edge 262c. That is, the length of the first inner surface 262b extending outward is less than the length of the first outer surface 262a extending outward, so that the ends of the first inner surface 262b and the first outer surface 262a will form a length difference, and this length difference is connected through the first arcuate edge 262c, so that the edge of the air inlet 21 forms a smooth edge shaped like a "bell mouth". When the air inlet 21 is entering, the first arcuate edge 262c has a guiding effect on the airflow entering therein, and its smooth lines can also prevent the airflow from having a rough contact with the side, so that the air intake efficiency of the portable fan can be improved and the wind noise of the air intake can be reduced.

In some embodiments, the length of the second inner surface 254 of the end of the air outlet 25 facing away from the fan assembly 3 is smaller than the length of the second outer surface 253, and the second inner surface 254 and the second outer surface 253 smoothly transition to form a second arcuate edge 255. That is, the length of the second inner surface 254 extending outward is smaller than the length of the second outer surface 253 extending outward. Therefore, a length difference is formed between the ends of the second inner surface 254 and the second outer surface 253. This length difference is connected through the second arcuate edge 255, so that the edge of the air outlet 22 forms a smooth edge shaped like a "bell mouth". When the air outlet 22 discharges air, the second arcuate edge 255 has a guiding effect on the outflowing airflow. When the airflow flows out, the arcuate surface of the second arcuate edge 255 forms a wall attachment effect, which quickly relieves the pressure of the high-speed airflow and increases the flow area of the airflow in the blowing direction. Its smooth lines can also avoid The airflow makes a rough contact with the side, thus improving the air outlet efficiency of the portable fan, increasing the blowing area, and reducing the wind noise.

In some embodiments, the air inlet cylinder 26 includes: a connection cylinder 261 and an air inlet ring 262, a plurality of connection baffles 261a, a first connection spring sheet 261b and a first claw 261c are all arranged on the connection cylinder 261, the connection cylinder 261 and the air inlet ring 262 are detachably connected, the maximum outer diameter of the connection cylinder 261 is smaller than the inner diameter of the assembly cylinder 24, and the maximum outer diameter of the air inlet ring 262 is larger than the outer diameter of the connection cylinder 23. The air inlet cylinder 26 can be disassembled into: a connection cylinder 261 and an air inlet ring 262. Although the assembly process is increased, the detachable structure allows the connection between the assembly cylinder 24 and the air inlet cylinder 26 to have more adjustable space and higher fault tolerance during assembly.

In this embodiment, the first inner surface 262 b and the first outer surface 262 a are both disposed on the air inlet ring 262 , and the first arc-shaped edge 262 c is also disposed on the air inlet ring 262 .

A plurality of connection retaining edges 261a are provided with connection screw holes 261d, and the air inlet ring 262 is provided with a threaded column 262d at a position corresponding to the connection screw hole 261d. The connection screw hole 261d and the threaded column 262d are connected by a first screw, and a receiving groove 245 for receiving the first screw, the connection screw hole 261d and/or the threaded column 262d is provided at one end of the assembly cylinder 24 connected to the air outlet cylinder 25. The receiving groove 245 can receive one or more of the first screw, the connection screw hole 261d or the threaded column 262d. The screw connection enables the connection between the assembly cylinder 24 and the air inlet cylinder 26 to be adjusted, and has a higher fault tolerance during assembly. The connection screw hole 261d is provided on the connection retaining edge 261a, and two connection modes are provided between the connection retaining edge 261a and the adjacent connection retaining edge 261a through reasonable use of space, thereby improving the space utilization efficiency. The opening of the receiving groove 245 can prevent the first screw from protruding from the surface of the assembly tube 24, thereby facilitating assembly.

The detachable connection method between the connecting tube 261 and the air inlet ring 262 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connecting tube 261 and the air inlet ring 262 can also be connected by a snap-fit method.

In some embodiments, the connecting tube 261 and the air inlet ring 262 can be prepared and formed by an integrated molding manufacturing technology.

The outer diameter of one end of the air outlet tube 25 connected to the assembly tube 24 is smaller than the inner diameter of the assembly tube 24 , and the maximum outer diameter of one end of the air outlet tube 25 facing away from the assembly tube 24 is larger than the outer diameter of the connecting tube 23 .

The outer diameter of the end of the air outlet tube 25 and the connecting tube 261 connected to the assembly tube 24 is smaller than the inner diameter of the assembly tube 24, so that the end of the air outlet tube 25 and the connecting tube 261 connected to the assembly tube 24 can be inserted into the assembly tube 24. The maximum outer diameter of the end of the air outlet tube 25 away from the assembly tube 24 and the air inlet ring 262 is larger than the outer diameter of the connecting tube 23, which can clamp and limit the connecting tube 23 to prevent the assembly tube 24 and the connecting tube 23 from separating or shifting.

In some embodiments, a limited stop edge 246 is provided on the inner wall of one end of the assembly cylinder 24 connected to the air outlet cylinder 25, a positioning piece 252 is provided at one end of the air outlet cylinder 25 connected to the assembly cylinder 24, and a positioning groove 247 is provided on the limited stop edge 246 at a position corresponding to the positioning piece 252, and the positioning piece 252 is provided in the extension direction of at least one first card slot 251 among the plurality of first card slots 251 facing the assembly cylinder 24. The provision of the positioning piece 252 and the positioning groove 247 facilitates the clamping assembly of the air outlet cylinder 25 and the assembly cylinder 24. The provision of the positioning piece 252 in the extension direction of the first card slot 251 facing the assembly cylinder 24 makes it easier to assemble the first card slot 251 with the second connecting elastic piece 243 and the second claw 244.

In some embodiments, a filter 27 is disposed between the connecting tube 23 and the air inlet ring 262. The filter 27 can prevent debris and the user's hair or clothes from being drawn into the fan assembly 3, thus providing good protection. The filter 27 is disposed between the connecting tube 23 and the air inlet ring 262, so that the filter 27 can be easily installed and replaced.

In some embodiments, the holding portion 1 includes: a shell 13, a battery 14 and a connector 15, the battery 14 is disposed in the shell 13, one end cover of the connector 15 is disposed at one end of the shell 13, and the other end of the connector is connected to the blowing portion 2.

The blowing part 2 and the holding part 1 are connected by the connecting piece 15, so that the blowing part 2 and the holding part 1 are independent of each other, which is convenient for disassembly and maintenance of one of them separately. At the same time, since the blowing part 2 and the holding part 1 both have predetermined functional shapes, their specific shapes are not convenient for connection and fixation. The connecting piece 15 is used to connect the two. The connecting piece 15 can be adaptively deformed and docked according to the different shape requirements of the blowing part 2 and the holding part 1, thereby improving the stability of the connection. For example, an arc groove is provided at one end of the connecting piece 15 connected to the blowing part 2, and the end of the connecting piece 15 connected to the holding part 1 is constructed to have a shape similar to the outer shape of the holding part 1.

In some embodiments, the connector 15 is connected to the blowing part 2 by screws, and the connector 15 is connected to the housing 13 by snap-fitting. However, the connection between the connector 15 and the blowing part 2 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 15 and the blowing part 2 can be connected and fixed by (but not limited to): gluing, snap-fitting, riveting, welding, etc. The connector 15 and the housing 13 can be connected and fixed by (but not limited to): interference fit, screw connection, riveting, gluing, welding, etc.

The portable fan also includes: a first PCB circuit board 41, a second PCB circuit board 42 and a third PCB circuit board 43. The first PCB circuit board 41 is arranged in the shell 13, the second PCB circuit board 42 is arranged on the connecting member 15, and the third PCB circuit board 43 is arranged on the fan assembly 3. The first PCB circuit board 41 and the second PCB circuit board 42 are perpendicular to each other. The first PCB circuit board 41 and the second PCB circuit board 42 are connected by a first conductive member 46, and the second PCB circuit board 42 and the third PCB circuit board 43 are connected by a second conductive member 47. The stiffness of the first conductive member 46 is greater than or equal to the stiffness of the second conductive member 47.

The first PCB circuit board 41, the second PCB circuit board 42 and the third PCB circuit board 43 are respectively arranged at different positions of the portable fan, which can not only increase the assembly area of various electronic components of the portable fan, but also effectively avoid the electrical The problem of large magnetic interference is effectively reduced, and the electronic interference intensity between different circuit boards is effectively reduced. At the same time, PCB circuit boards in different positions can also avoid excessive heat concentration of electronic components and improve the heat dissipation efficiency of portable fans.

The rigidity of the first conductive member 46 is greater than that of the second conductive member 47, so that the second PCB circuit board 42 has a greater supporting force on the first PCB circuit board 41. Combined with the structure in which the first PCB circuit board 41 and the second PCB circuit board 42 are perpendicular to each other, the second PCB circuit board 42 has a supporting effect on the first PCB circuit board 41, thereby preventing the first PCB circuit board 41 from being displaced toward the inside of the housing 13 under the action of external force.

The second conductive member 47 has a smaller connection rigidity, which facilitates the installation of the blowing part 2 and the connecting member 15 .

In some embodiments, the first conductive member 46 is a motor component pin or a welded prismatic iron metal rod, and the second conductive member 47 is a wire, a flat cable or a flexible circuit board.

The first PCB circuit board 41 is fixedly connected to the inner surface of the housing 13, the second PCB circuit board 42 is fixedly connected to the connecting member 15 by screws, and the third PCB circuit board 43 is fixedly connected to the fan assembly 3. The first PCB circuit board 41 is connected by a clamping connection, which is convenient for assembly and disassembly. The second PCB circuit board 42 is fixedly connected to the connecting member 15 by screws. Since the second PCB circuit board 42 needs to support the first PCB circuit board 41, the better the installation stability of the second PCB circuit board 42, the higher the limit or support degree of the first PCB circuit board 41. The third PCB circuit board 43 is fixedly connected to the fan assembly 3, which is convenient for assembly and disassembly, and can serve as a dust cover for the fan assembly 3.

In some embodiments, the first PCB circuit board 41 is connected to the first control button 44, the second PCB circuit board 42 is connected to the second control button 45, the movement path of the first control button 44 after being subjected to force is perpendicular to the first PCB circuit board 41, and the movement path of the second control button 45 after being subjected to force is parallel to the second PCB circuit board 42. Since the first PCB circuit board 41 is fixed by snap connection, and the second PCB circuit board 42 can support the first PCB circuit board 41, the first PCB circuit board 41 has a higher force strength in its vertical direction, and is suitable for assembling the first control button 44 that moves in its vertical direction. The second PCB circuit board 42 is fixed to the connector 15 by screws, has a large suspended area, and has a weak vertical force bearing capacity. However, due to the screw fixation, it has a strong anti-rotation ability, the movement path of the second control button 45 after being subjected to force is parallel to the second PCB circuit board 42, and the second PCB circuit board 42 can well resist the steering force or deflection force applied to the second control button 45 when in use.

The term "plurality" in this embodiment refers to a number of two or more.

It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

Scheme 12 is shown in Figures 11-1 to 11-5.

In one embodiment, as shown in FIG. 11-1 to FIG. 11-3, the high-speed motor of the present application is used in a portable fan. The portable fan includes an air outlet 100 and a hand-held part 200. The air outlet 100 is used to discharge air, and the hand-held part 200 is used for a user to hold it, so that the user can hold it and use it.

In one embodiment, as shown in Fig. 11-2 and Fig. 11-3, the air outlet 100 includes a housing 1, a casing 2, a buffer 30 and the high-speed motor from the outside to the inside. The high-speed motor includes a barrel 4, a driving plate 55, a stator assembly 54, a rotor assembly and a fan blade 6. The high-speed motor can provide sufficient power and speed to ensure the wind force of the portable fan.

The buffer 30 is arranged outside the cylinder 4, the casing 2 is arranged outside the buffer 30, and the outer shell 1 is arranged outside the casing 2. By setting the cylinder 4, the buffer 30, the casing 2 and the outer shell 1 as a four-layer structure, the layers are fixed and the overall structure is stable. When using the high-speed motor, the overall vibration reduction effect is ensured to be good. The buffer 30 is arranged outside the cylinder 4, and the buffer 30 absorbs and reduces the vibration caused by the high-speed motor in time, so that the portable fan can continue to rotate at a high speed stably.

In one embodiment, as shown in FIG. 11-2 and FIG. 11-3, the buffer member 30 is used as an isolation buffer interface between the barrel 4 and the casing 2. In one embodiment, the buffer member 30 is a smooth surface; in another embodiment, in order to enhance its isolation and buffering properties, a plurality of convex points may be arranged at intervals on the outer surface of the buffer member 30. In addition, the buffer member 30 may only cover part of the outer surface of the barrel 4, or may cover the entire outer surface of the barrel 4, or may cover the front end face and the rear end face of the barrel 4, but is not limited thereto.

In one embodiment, as shown in Fig. 11-3 and Fig. 11-5, the cylinder 4 includes an outer ring portion 40, an inner ring portion 41, and a plurality of connecting leaves 42 connecting the outer ring portion 40 and the inner ring portion 41. The inner ring portion 41 is shorter than the outer ring portion 40, and the front end of the inner ring portion 41 extends forward beyond the front end of the outer ring portion 40. A base plate 44 is formed in the inner ring portion 41, and a hollow shaft cylinder 45 protrudes backward from the base plate 44 and extends backward beyond the rear end of the inner ring portion 41, but does not exceed the rear end of the outer ring portion 40. The stator assembly 54, the rotor assembly and the shaft cylinder 45 are nested and fixed.

In one embodiment, as shown in FIG. 11-3 and FIG. 11-4, a first step portion 451 is formed on the outer side of the shaft cylinder 45, and the stator assembly 54 is arranged outside the shaft cylinder 45 and abuts against the first step portion 451. The rotor assembly includes a rotating shaft 50, a bearing 51 and a magnetic ring 52. The rotating shaft 50 extends into the shaft cylinder 45, the bearing 51 is arranged outside the rotating shaft 50, the buffer sleeve 31 is arranged outside the bearing 51, and the magnetic ring 52 is arranged outside the stator assembly 54. By arranging the buffer sleeve 31 outside the bearing 51, the buffer sleeve 31 can fully absorb the vibration generated by the bearing 51 and the noise generated by the vibration, so that the high-speed motor can work continuously and stably.

In one embodiment, as shown in Fig. 11-2, Fig. 11-3 and Fig. 11-5, a receiving portion 46 and a buckle 47 are provided at the front end of the inner ring portion 41, wherein the receiving portion 46 is used to receive the drive plate 55, and the buckle 47 is used to buckle and fix the drive plate 55. The base plate 44 is provided with a wire passing opening, through which a wire passes to electrically connect the drive plate 55 and the stator assembly 54. The drive plate 55 is electrically connected to the stator assembly 54 and drives the rotor assembly to rotate.

In one embodiment, as shown in FIG. 11-3 and FIG. 11-4, the bearing 51 is provided with two, including a first bearing 511 and a second bearing 512, and the first bearing 511 and the second bearing 512 are both provided outside the rotating shaft 50. The first bearing 511 is located in front of the second bearing 512, and at least one of the first bearing 511 and the second bearing 512 is provided with the buffer sleeve 31. In this embodiment, the buffer sleeve 31 is provided outside the first bearing 511 and the second bearing 512. Of course, in other embodiments, the buffer sleeve 31 may be provided outside the first bearing 511, and the buffer sleeve 31 may not be provided outside the second bearing 512; or the buffer sleeve 31 may not be provided outside the first bearing 511, and the buffer sleeve 31 may be provided outside the second bearing 512.

In one embodiment, as shown in FIG. 11-3 and FIG. 11-4, the buffer sleeve 31 is formed with a groove 313, and the groove 313 is formed on one or more of the radial outer side, radial inner side, axial outer side, and axial inner side of the buffer sleeve 31. In this embodiment, the groove 313 is formed on the radial outer side of the buffer sleeve 31, and the groove 313 is arranged around the buffer sleeve 31. The provision of the groove 313 can give the buffer sleeve 31 some deformation space, so that the buffer sleeve 31 has a stronger buffering absorption capacity. The outer diameter of the buffer sleeve 31 is 5.96 mm (millimeter, the same below), the depth of the groove 313 is 0.1 mm, and the width of the groove 313 is 0.7 mm.

In one embodiment, the first bearing 511 and the second bearing 512 are both provided with the buffer sleeve 31. The first bearing 511 is provided with the first buffer sleeve 311, and the second bearing 512 is provided with the second buffer sleeve 312. The first bearing 511 and the second bearing 512 respectively have an inner wall, an outer wall, and a ball disposed between the inner wall and the outer wall, and the rotating shaft 50 is penetrated through the inner walls of the first bearing 511 and the second bearing 512. A second step portion 452 is formed on the inner side of the shaft cylinder 45, and the first bearing 511 and the first buffer sleeve 311 are abutted against the second step portion 452 from front to back, and the first buffer sleeve 311 covers the radial outer side and rear side of the outer wall of the first bearing 511. The second bearing 512 and the second buffer sleeve 312 are abutted against the rear end of the shaft cylinder 45 from back to front, and the second buffer sleeve 312 covers the radial outer side and front side of the outer wall of the second bearing 512, and part of the stator assembly 54 is disposed outside the second buffer sleeve 312.

In one embodiment, as shown in FIG. 11-3 and FIG. 11-4 , the rotor assembly further includes a housing 53. The housing 53 opens forward, and includes a first side wall 531, a second side wall 532, and a rear wall 533. The first side wall 531 is located radially inward of the second side wall 532, and the first side wall 531 is shorter than the second side wall 532, and the rear wall 533 connects the first side wall 531 and the second side wall 532. The first side wall 531 is fixedly disposed outside the rotating shaft 50, and the second side wall 532 is disposed outside the magnetic ring 52.

In one embodiment, as shown in FIGS. 11-3 and 11-4 , the second side wall 532 and the inner ring portion 41 are adjacently arranged in the axial direction, and the first side wall 531 and the second bearing 512 are adjacently arranged in the axial direction. The spacing between the second side wall 532 and the inner ring portion 41 is smaller than the spacing between the first side wall 531 and the second bearing 512. In this embodiment, the spacing between the first side wall 531 and the second bearing 512 is 0.8 mm, and the spacing between the second side wall 532 and the inner ring portion 41 is 0.7 mm, but this is not limiting.

In one embodiment, as shown in FIG. 11-3 and FIG. 11-4, a buffer pad 33 is provided at the front end of the second side wall 532 and/or the rear end of the inner ring portion 41. In this embodiment, a buffer pad 33 is provided at the rear end of the inner ring portion 41, and a plurality of buffer pads 33 are provided, which are distributed at the rear end of the inner ring portion 41, so that even when the high-speed motor falls or is hit by an external impact, the front end of the second side wall 532 can be prevented from impacting and vibrating the rear end of the inner ring portion 41. The thickness of the buffer pad 33 is 0.3 mm, which can well absorb and reduce the impact vibration, but it is not limited to this. It should be understood that the buffer pad 33 can also be provided at the front end of the second side wall 532, and the buffer pad 33 can be arranged in a circle around the front end of the second side wall 532 and/or the rear end of the inner ring portion 41. In addition, the spacing between the second side wall 532 and the inner ring portion 41 is smaller than the spacing between the rotating shaft 50 and the driving plate 55. In this way, even if the high-speed motor falls or is hit by other external impacts, the front end of the rotating shaft 50 will not hit and damage the driving plate 55.

In one embodiment, as shown in FIGS. 11-3 to 11-5 , the outer diameter of the barrel 4 is 23.71-24.05 mm, and the length of the barrel 4 is 30-33.05 mm. The barrel 4 is small in size, so that the overall volume of the portable fan can also be small, thereby improving the portability of the portable fan. The barrel 4 also includes a plurality of extension leaves 43, and the plurality of extension leaves 43 correspond to the plurality of connecting leaves 42 one by one, and the extension leaves 43 are formed by extending backward from the connecting leaves 42. The connecting leaves 42 extend vertically forward, and the extension leaves 43 extend in an arc shape, and the plurality of extension leaves 43 surround the outside of the second side wall 532.

In one embodiment, as shown in FIGS. 11-2 to 11-4, a fan blade 6 is also fixedly provided at the rear end of the rotating shaft 50. The front end of the fan blade 6 is arranged adjacent to the rear wall 533 of the housing 53 in the axial direction. The fan blade 6 is coaxially arranged with the housing 53, the magnetic ring 52, and the bearing 51, and the fan blade 6 and the housing 53 are arranged adjacent to each other, and there is no need to set a transmission device between the housing 53 and the fan blade 6, which effectively improves the transmission efficiency of the fan blade 6. The fan blade 6 includes a hub 60, and a plurality of blades 61 arranged around the outer side of the hub 60 at intervals. A shaft column 62 is also provided on the inner side of the hub 60, and the shaft column 62 is fixedly provided outside the rotating shaft 50, and a plurality of ribs 63 connect the shaft column 62 and the hub 60. The rear wall 533 is penetrated with a notch, and the elastic member 32 passes through the notch of the rear wall 533, and the two ends of the elastic member 32 are respectively abutted against the ribs 63 and the second bearing 512. The elastic member 32 abuts against the diameter of one end of the rib leaf 63. The diameter of the elastic member 32 is larger than the diameter of the second bearing 512 abutted by the elastic member 32 . The maximum outer diameter of the elastic member 32 is 7-7.8 mm, and the minimum inner diameter of the elastic member 32 is 2.05 mm.

In one embodiment, as shown in Figures 11-2 and 11-3, the fan blade 6 is a diagonal flow fan blade, the hub 60 radially increases and extends from the back to the front, and the hub 60 is arc-shaped. The diameter of the hub 60, the diameter of the housing 53, and the diameter of the inner ring portion 41 are less than 0.5 mm apart from each other, and in the axial direction, the housing 53 and the inner ring portion 41 are arranged adjacent to each other in front and back intervals, and the hub 60 and the housing 53 are arranged in close proximity. The rear end of the fan blade 6 does not extend backward beyond the rear end of the outer ring portion 40, and the fan can be completely arranged in the four-layer structure of the outer ring portion 40, the buffer 30, the sleeve 2, and the outer shell 1, which can effectively absorb and reduce the noise generated by the high-speed rotation of the fan blade 6. It should be understood that the channel between the inner ring portion 41 and the outer ring portion 40, and the channel between the second side wall 532 and the outer ring portion 40 belong to the air duct of the portable fan. The fan blades 6 rotate, and the high-speed turbulence generated by the high-speed rotating fan blades 6 first flows through the curved extension blades 43 to be initially combed, then flows through the connecting blades 42 extending vertically forward to be combed again, and is guided to be sprayed vertically forward to reduce kinetic energy loss and retain large air volume and high wind pressure.

In one embodiment, as shown in FIGS. 11-1 to 11-3 , the air outlet portion 100 further includes an air inlet cover 7 and an air outlet cover 8. The air inlet cover 7 is fixed to the rear side of the casing 2 and is disposed on the rear side of the outer shell 1. The air outlet cover 8 is fixed to the front side of the casing 2 and is disposed on the front side of the outer shell 1.

In one embodiment, as shown in FIGS. 11-2 and 11-3 , a power supply 201 and a control board 202 are provided in the handheld portion 200, and the air outlet portion 100 and the handheld portion 200 are fixed. The control board 202 is electrically connected to the drive board 55 through a wire. The power supply 201 is provided below the control board 202, and the power supply 201 is electrically connected to the control board 202. The power supply 201 can directly supply power to the high-speed motor to drive the fan blade 6 to rotate without connecting to an external power supply.

It should be understood that the buffer 30, the buffer sleeve 31, and the elastic member 32 all have the ability to be elastically deformed, but the specific material, form, and deformation ability can be selected from existing elastic materials. For example, the buffer 30 can be a silicone material or a foam material, and the buffer sleeve 31 can be a silicone material or a foam material; the elastic member 32 can be a spring material or a silicone material. The specific elastic material is not limited to the above examples, as long as it has the ability to be elastically deformed and can provide a buffering and shock absorbing effect.

Scheme 13 is shown in Figures 12-1 to 12-5.

In one embodiment, as shown in FIG. 12-1 and FIG. 12-2 , a high-speed motor of the present application is provided. The high-speed motor comprises a barrel 1, a stator assembly 2 and a rotor assembly. The barrel 1 comprises an outer ring portion 11, an inner ring portion 12, and a plurality of connecting blades 13 connecting the outer ring portion 11 and the inner ring portion 12.

In one embodiment, as shown in FIG. 12-3 to FIG. 12-5, a base plate 14 is formed in the inner ring portion 12, and a shaft cylinder 15 protrudes and extends backward from the base plate 14. An integral bearing mounting structure is provided in the shaft cylinder 15, and the bearing mounting structure includes a first bearing chamber 151 and a second bearing chamber 152. The stator assembly 2, the rotor assembly and the shaft cylinder 15 are nested and fixed. The rotor assembly includes a rotating shaft 31, and a first bearing 32 and a second bearing 33 arranged on the radial outer side of the rotating shaft 31. The rotating shaft 31 extends into the shaft cylinder 15, the first bearing 32 is accommodated in the first bearing chamber 151, and the second bearing 33 is accommodated in the second bearing chamber 152, so as to fix the rotating shaft 31 and the shaft cylinder 15.

In one embodiment, as shown in FIGS. 12-3 to 12-5 , a first step portion 153 is formed on the outer side of the shaft cylinder 15, and the stator assembly 2 is disposed outside the shaft cylinder 15 and abuts against the first step portion 153. By providing the first step portion 153, the stator assembly 2 is nested and positioned radially outside the shaft cylinder 15.

In one embodiment, as shown in FIG. 12-3 to FIG. 12-5, the bearing mounting structure is integrally formed in the shaft cylinder 15. That is, in this embodiment, the first bearing chamber 151 and the second bearing chamber 152 are directly integrally formed by the shaft cylinder 15, and the axis of the first bearing chamber 151, the axis of the second bearing chamber 152 and the axis of the shaft cylinder 15 coincide, which not only ensures the concentricity of the first bearing 32 and the second bearing 33, but also ensures the concentricity of the first bearing 32, the second bearing 33 and the shaft cylinder 15. Of course, in other embodiments, the bearing mounting structure can be integrally formed separately and then embedded in the shaft cylinder 15, which can also ensure the concentricity between the first bearing 32 and the second bearing 33. The first bearing chamber 151 is located in front of the second bearing chamber 152, and the rear end of the first bearing chamber 151 forms a second step portion 154, and the rear end of the second bearing chamber 152 forms a third step portion 155. The step portion is formed at the rear end of the bearing chamber to limit the backward movement of the bearing and fix the bearing.

In one embodiment, as shown in FIGS. 12-3 to 12-5 , the diameter of the first bearing chamber 151 is greater than the diameter of the second bearing chamber 152, and the outer diameter of the first bearing 32 is greater than the outer diameter of the second bearing 33. Therefore, after the second bearing 33 first enters from the front end of the shaft cylinder 15 and is accommodated in the second bearing chamber 152, the first bearing 32 then enters from the front end of the shaft cylinder 15 and is accommodated in the first bearing chamber 151. In this embodiment, a buffer pad is provided between the first bearing 32 and the second step portion 154 to buffer the vibration between the first bearing 32 and the second step portion 154. In addition, in other embodiments, the buffer pad may also be provided between the second bearing 33 and the third step portion 155. Alternatively, the buffer pad is not provided between the first bearing 32 and the second step portion 154, and the buffer pad is provided between the second bearing 33 and the third step portion 155.

In one embodiment, as shown in FIG. 12-3 to FIG. 12-5, the diameter of the first bearing chamber 151 is 5.8-7.2 mm, and the diameter of the second bearing chamber 152 is 4.8-5.2 mm. A buffer sleeve may be provided outside the first bearing 32 and the second bearing 33. The buffer sleeve may be The vibration of the first bearing 32 and the second bearing 33 is further alleviated, thereby further reducing noise. Of course, the buffer sleeve may not be provided outside the first bearing 32 and the second bearing 33.

In one embodiment, as shown in FIG. 12-3 to FIG. 12-5, the bearing mounting structure further includes a transition section 156 disposed between the first bearing chamber 151 and the second bearing chamber 152, and the diameter of the transition section 156 decreases from front to back. The transition section 156 decreases from front to back, which facilitates the second bearing 33 to move backward from the front end of the bearing mounting structure into the second bearing chamber 152. The transition section 156 accommodates an isolating member 6, and the isolating member 6 is used to isolate and position the first bearing 32 and the second bearing 33, so as to prevent the first bearing 32 and the rotating shaft 31, and the second bearing 33 and the rotating shaft 31 from relative displacement. The length of the isolating member 6 is 5.65-6.05 mm.

In one embodiment, as shown in FIGS. 12-3 to 12-5 , the rotating shaft 31 is inserted into the shaft cylinder 15 and passes through the second bearing 33 and the first bearing 32. A slot is formed at the front end of the rotating shaft 31, and a buffer 8 is provided between the stopper 7 and the first bearing 32. The stopper 7 and the buffer 8 limit the relative displacement between the first bearing 32 and the rotating shaft 31.

In one embodiment, as shown in FIGS. 12-3 to 12-5, the rotor assembly further includes a housing 34 and a magnetic ring 35 disposed radially outside the rotating shaft 31, the magnetic ring 35 being disposed radially outside the stator assembly 2, the housing 34 opening facing forward, and the side wall of the housing 34 being disposed radially outside the magnetic ring 35. The high-speed motor further includes a fan blade 4 and a drive plate 5. The fan blade 4 is fixedly disposed at the rear end of the rotating shaft 31, and the fan blade 4 and the housing 34 are disposed adjacent to each other. The drive plate 5 is disposed at the front end of the inner ring portion 12, the drive plate 5 is electrically connected to the stator assembly 2, and drives the rotor assembly and the fan blade 4 to rotate.

In one embodiment, as shown in Fig. 12-3 to Fig. 12-5, an elastic member is further provided between the rear wall of the housing 34 and the second bearing 33 to further limit the relative displacement between the second bearing 33 and the rotating shaft 31, and to buffer and reduce the vibration of the second bearing 33. The front and rear ends of the first bearing 32 and the front and rear ends of the second bearing 33 are both supported, and the pre-pressure between the first bearing 32, the second bearing 33 and the whole high-speed motor is balanced, and the vibration of the first bearing 32 and the second bearing 33 is buffered and reduced, thereby effectively reducing the noise of the high-speed motor.

It should be understood that the isolating member 6, the buffer member 8, the buffer pad and the elastic member in the high-speed motor described in the present application can all be elastic, but the specific material and form can be selected from existing elastic materials, for example, the isolating member 6, the buffer member 8 and the elastic member can all be silicone materials; the isolating member 6 and the buffer member 8 can be silicone materials, and the elastic member is an elastic metal material. The specific elastic material is not limited to the above examples, as long as it is elastic and can provide a buffering and shock absorbing effect.

In one embodiment, the high-speed motor is used in a portable fan, which can be a handheld fan, a neck hanging fan, a clip fan, a hanging fan, etc. Of course, the high-speed motor can also be used in other devices, not limited to the examples.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (20)

A fan module, comprising: An air guide cover, wherein an air inlet is provided on the air guide cover; An air guide duct, wherein the air guide duct is provided with an air outlet corresponding to the air inlet, and one end of the air guide duct facing away from the air outlet is connected to one end of the air guide cover facing away from the air inlet; A fan assembly is connected to the air duct, and at least a portion of the structure of the fan assembly extends out of the air duct and into the air duct cover. The fan module according to claim 1, wherein: The fan assembly comprises: a motor assembly and a fan blade assembly, one end of the motor assembly is connected to the air guide duct, and the fan assembly is sleeved on the motor assembly; The fan blade assembly comprises: a hub, a connecting ring and a plurality of blades, wherein the plurality of blades are arranged around the hub surface along the circumference of the hub, one end of the connecting ring is connected to the hub, and the other end of the connecting ring is sleeved on the motor assembly; The air guide duct comprises: an air guide shell, a storage cylinder and a plurality of air guide plates, the storage cylinder is arranged in the air guide shell, the plurality of air guide plates are arranged around the circumference of the storage cylinder, and one end of the plurality of air guide plates is connected to the inner surface of the air guide shell, and the other end of the plurality of air guide plates is connected to the storage cylinder, the air guide shell is connected to the air guide cover, the motor assembly is connected to the storage cylinder, and the air guide shell, the storage cylinder and the plurality of air guide plates enclose the air outlet; The inner surface of the air guide cover bulges inward to form a neck ring, and the neck ring is arranged at a position corresponding to one end of the fan blade assembly facing the air inlet; The fan module further comprises: a flexible shell, wherein the air guide cover and the air guide duct are arranged in the flexible shell; The flexible shell is made of a silicone material, and the surface of the flexible shell is raised to form a plurality of convex rings, wherein a plurality of convex points are arranged between two adjacent convex rings in the plurality of convex rings. The fan module according to claim 2, wherein: The hub is configured to be conical, and the plurality of blades are bent and extended along the conical surface of the hub from the air inlet direction to the air outlet direction; From the air inlet direction to the air outlet direction, the blade spacing between two adjacent blades in the plurality of blades gradually increases; The wheel hub and the plurality of blades are located in the wind guide cover, one end of the connecting ring sleeved with the motor assembly extends into the wind guide pipe, and one end of the connecting ring connected to the wheel hub is located in the wind guide cover; The plurality of air guide plates are bent at one end close to the fan assembly, and the bending direction of the bent end of the plurality of air guide plates is opposite to the rotation direction of the fan assembly; The cross-sectional area of one end of the hub connected to the connecting ring is greater than or equal to the cross-sectional area of the storage tube; The hub and the plurality of blades are arranged between the neck ring and the receiving tube; The necking ring divides the air guide cover into a first cover body and a second cover body, the outer surfaces of the first cover body and the second cover body are provided with a plurality of reinforcing ribs, the first cover body is provided with the air inlet, the second cover body is connected to the air guide pipe, and the hub is located in the second cover body; The inner surface of the second cover body corresponding to the wheel hub is configured to be arc-shaped. Each of the plurality of blades includes a first end portion adjacent to an air outlet and a second end portion corresponding to the first end portion, wherein a width of the first end portion is greater than a width of the second end portion. The fan module according to claim 2, wherein: The motor assembly comprises: a rotating shaft, a coil and a magnetic ring, the storage tube is provided with a connecting portion, one end of the rotating shaft is connected to the connecting portion, the other end of the rotating shaft is connected to the fan blade assembly, the coil is provided on the connecting portion, the magnetic ring is provided on the fan blade assembly, and the magnetic ring is sleeved on the coil; The connecting part comprises: a bracket, the end of the storage tube is raised inward to form an assembly frame, the assembly frame is provided with an assembly hole that passes through the assembly frame, one end of the bracket is inserted into and passes through the assembly hole, one end of the bracket passing through the assembly hole is connected to the rotating shaft, and the magnetic ring is sleeved on the bracket; The motor assembly further comprises: a motor shell, wherein the motor shell is sleeved on the magnetic ring, the connecting ring is sleeved on the motor shell, and one end of the rotating shaft connected to the fan blade assembly passes through the motor shell. The fan module according to claim 4, wherein: The connecting part further comprises: a first sleeve, a second sleeve and a retaining spring, a mounting hole penetrating the bracket is provided on the bracket, a stop ring is formed by a bulge inside the mounting hole, the first sleeve and the second sleeve are respectively arranged at two ends of the stop ring, the retaining spring is arranged in the mounting hole and overlaps with the second sleeve, one end of the rotating shaft passes through the first sleeve and the second sleeve and is connected to the retaining spring, and the magnetic ring is arranged at the position where the first sleeve is arranged on the bracket; The bracket is connected to the assembly frame by clamping. The fan module according to claim 5, wherein: The motor assembly further comprises: a conical helical spring, wherein the conical helical spring is sleeved on the rotating shaft, one end of the conical helical spring is connected to the motor housing, and the other end of the conical helical spring is connected to the first sleeve; or, The motor assembly also includes: a conical helical spring, which is sleeved on the rotating shaft, one end of the conical helical spring is connected to the wheel hub, and the other end of the conical helical spring is connected to the first sleeve. The fan module according to claim 1, wherein: The fan assembly comprises: a motor assembly and a fan blade assembly; The air guide duct comprises: an air guide shell, a storage cylinder and a plurality of air guide plates, wherein the storage cylinder is arranged in the air guide shell, the plurality of air guide plates are arranged around the circumference of the storage cylinder, and one end of the plurality of air guide plates is connected to the inner surface of the air guide shell, and the other end of the plurality of air guide plates is connected to the storage cylinder; The motor assembly includes: a rotating shaft, a coil and a magnetic ring. A connecting portion is provided on the storage tube, one end of the rotating shaft is connected to the connecting portion, and the other end of the rotating shaft is connected to the fan blade assembly. The coil is provided on the connecting portion, and the magnetic ring is sleeved on the coil. A motor for a portable rotating device is a high-speed motor, comprising: The cylinder comprises an outer ring portion, an inner ring portion and a plurality of connecting leaves connecting the outer ring portion and the inner ring portion, the rear end of the cylinder inletting air and the front end outletting air, the inner ring portion being shorter than the outer ring portion, the inner ring portion being located at the inner side corresponding to the front end portion of the outer ring portion, and the front end of the inner ring portion being forwardly beyond the front end of the outer ring portion; A base plate is formed inside the inner ring portion, a hollow shaft cylinder protrudes backwards from the base plate, and a first buffer is disposed outside the outer ring portion; A driving plate, mounted on the front end of the inner ring portion; The front end of the inner ring portion is provided with a receiving portion and a buckle, the receiving portion is used to receive the driving plate, and the buckle is used to buckle the driving plate; A stator assembly and a rotor assembly, wherein the driving plate is electrically connected to the stator assembly and drives the rotor assembly to rotate, and the stator assembly and the rotor assembly are nested and fixed to the shaft cylinder from behind; The substrate is provided with a wire-passing notch, and a wire passes through the wire-passing notch to electrically connect the driving plate and the stator assembly. The motor of the portable rotating device according to claim 8, wherein: The rotor assembly comprises a rotating shaft, a bearing and a stopper, wherein the bearing, the stopper and the stator assembly are all inserted outside the rotating shaft, and the rotating shaft is inserted into the shaft cylinder from back to front; two bearings are provided, one of which is clamped outside the rotating shaft and inside the shaft cylinder from back to front, and the other bearing is clamped outside the rotating shaft and inside the shaft cylinder from front to back, and a second buffer is provided between the two bearings, and the inner diameter of the shaft cylinder corresponding to the second buffer is smaller than the inner diameter of the shaft cylinder corresponding to the bearing; a slot is provided radially outside the front part of the rotating shaft, and the stopper is clamped in the slot from front to back, and a third buffer is provided between the front bearing and the stopper; The rotor assembly also includes a casing, which is open toward the front and includes a rear portion and a side portion. The magnetic ring is fixed to the inner side of the casing side portion, and the stator assembly is fixed to the inner side of the magnetic ring. The shaft cylinder extends backward beyond the rear end of the inner ring portion but does not extend beyond the rear end of the outer ring portion. In the radial direction, the stator assembly, the magnetic ring and the side portion of the casing are sleeved on the outer side of the shaft cylinder, and the front end of the casing side portion is closely spaced from the inner ring portion in the axial direction. The motor of the portable rotating device according to claim 9, wherein: The rotor assembly further comprises a fan, which is fixedly arranged at the rear end of the rotating shaft, and the front end of the fan is arranged closely adjacent to the rear end of the housing in the axial direction; The fan comprises a hub and a plurality of blades arranged around the hub, a rib blade is arranged on the inner side of the hub, a notch is arranged through the rear of the housing, a fourth buffer passes through the notch of the rear of the housing and is arranged between the rear bearing and the rib blade of the fan, a rear end of the fourth buffer abuts against the rib blade, and a front end of the fourth buffer abuts against the rear bearing; The bearing outer sleeve is provided with a fifth buffer member. The motor of the portable rotating device according to claim 10, wherein: The fan is a diagonal flow fan, comprising a hub and a plurality of blades arranged around the outside of the hub, the hub radially increasing and extending from back to front, and the hub is arc-shaped; the difference between any two of the diameter of the hub, the diameter of the casing and the diameter of the inner ring portion is less than 0.5 mm. The motor of the portable rotating device according to claim 9, wherein: The distance between the side of the housing and the rear end of the inner ring is smaller than the distance between the rear of the housing and the rear bearing; the distance between the side of the housing and the rear end of the inner ring is smaller than the distance between the front end of the rotating shaft and the rear end of the driving plate; The cylinder also includes a plurality of extension leaves, which correspond to the plurality of connecting leaves one by one, and are formed by extending backward from the connecting leaves; the connecting leaves extend vertically forward, and the extension leaves are curved and extended in an arc shape, and the plurality of extension leaves surround the outside of the side of the casing. The motor of the portable rotating device according to claim 8, wherein: The outer diameter of the cylinder is 23.71-24.05 mm, and the length of the cylinder is 30-33.05 mm. A high-speed motor, comprising: The cylinder body comprises an outer ring portion, an inner ring portion, and a plurality of connecting leaves connecting the outer ring portion and the inner ring portion, wherein a base plate is formed in the inner ring portion, and a shaft cylinder protrudes and extends backward from the base plate, wherein an integrally formed bearing mounting structure is arranged in the shaft cylinder, and the bearing mounting structure comprises a first bearing chamber and a second bearing chamber; A stator assembly and a rotor assembly, wherein the stator assembly, the rotor assembly and the shaft cylinder are nested and fixed; Wherein, the rotor assembly includes a rotating shaft, and a first bearing and a second bearing arranged radially outside the rotating shaft, the rotating shaft extends into the shaft cylinder, the first bearing is accommodated in the first bearing chamber, and the second bearing is accommodated in the second bearing chamber to fix the rotating shaft and the shaft cylinder. The high-speed motor according to claim 14, wherein: A first step portion is formed on the outer side surface of the shaft cylinder, and the stator assembly is arranged outside the shaft cylinder and abuts against the first step portion forward. The high-speed motor according to claim 15, wherein: The bearing mounting structure is integrally formed in the shaft cylinder, the first bearing chamber is located in front of the second bearing chamber, the rear end of the first bearing chamber forms a second step portion, and the rear end of the second bearing chamber forms a third step portion; The diameter of the first bearing chamber is larger than the diameter of the second bearing chamber, the outer diameter of the first bearing is larger than the outer diameter of the second bearing, and after the second bearing enters from the front end of the shaft cylinder and is accommodated in the second bearing chamber, the first bearing enters from the front end of the shaft cylinder and is accommodated in the first bearing chamber; At least one of a buffer pad is provided between the first bearing and the second step portion and between the second bearing and the third step portion; The diameter of the first bearing chamber is 6.8-7.2 mm, and the diameter of the second bearing chamber is 4.8-5.2 mm. The high-speed motor according to claim 16, wherein: The bearing installation structure further includes a transition section disposed between the first bearing chamber and the second bearing chamber, wherein the diameter of the transition section decreases from front to back; The transition section accommodates an isolating member, and the isolating member is used to isolate and position the first bearing and the second bearing; the length of the isolating member is 5.65-6.05 mm. The high-speed motor according to claim 16, wherein: The rotating shaft is inserted into the shaft tube and passes through the second bearing and the first bearing. A slot is formed at the front end of the rotating shaft. A limiter is clamped in the slot. A buffer is provided between the limiter and the first bearing. The high-speed motor according to claim 14, wherein: The rotor assembly also includes a casing and a magnetic ring arranged radially outside the rotating shaft, the magnetic ring is arranged radially outside the stator assembly, the casing opening faces forward, and the side wall of the casing is arranged radially outside the magnetic ring; it also includes fan blades, the fan blades are fixed to the rear end of the rotating shaft, and the fan blades and the casing are arranged in close proximity. The high-speed motor according to claim 19, wherein: It also includes a driving plate, which is arranged at the front end of the inner ring portion. The driving plate is electrically connected to the stator assembly and drives the rotor assembly and the fan blades to rotate.