CN104819132B - Base for bladeless fan and bladeless fan - Google Patents

Abstract

The present invention discloses a base for a bladeless fan, including a shell and a power system. The power system is accommodated in the shell, and the power system includes an impeller housing, an impeller and a motor. A first air inlet is formed on the shell, and the shell is cylindrical and protrudes radially outward at the location where the first air inlet is opened. The impeller housing is mounted on the shell, and the impeller is arranged in the impeller housing. The motor is used to drive the impeller. The impeller housing is formed with a reflow chamber to prevent airflow backflow, and the bottom section of the impeller housing is bent inwardly and upwardly to form the reflow chamber and an annular groove whose opening is directly blocked by the bottom section of the impeller. The present invention also discloses a bladeless fan. In this way, since the impeller housing is formed with a reflow chamber, the reflow chamber can prevent airflow backflow, thereby reducing the noise caused by airflow backflow.

Description

Base for bladeless fans and bladeless fans

technical field

The invention relates to the field of fans, in particular to a base for a bladeless fan and the bladeless fan.

Background technique

The airflow in the prior art bladeless fan base will generate noise due to backflow.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention needs to provide a base for a bladeless fan.

The present invention also needs to provide a bladeless fan.

A base for a bladeless fan according to a preferred embodiment of the present invention includes a casing and a power system. The power system is accommodated in the housing, the power system includes an impeller casing, an impeller and a motor, a first air inlet is formed on the housing, the housing is cylindrical and the first air inlet is opened on the housing. An air inlet protrudes radially outward. The impeller casing is erected on the housing, the impeller is arranged in the impeller casing, the motor is used to drive the impeller, and the impeller casing is formed with a return cavity to prevent air flow backflow, and the impeller casing The bottom section of the impeller bends inwards and upwards to form an annular groove in which the return chamber and the opening are directly blocked by the bottom section of the impeller.

In the base for the bladeless fan according to the preferred embodiment of the present invention, since the impeller shell is formed with a backflow chamber, the backflow chamber can prevent the backflow of the airflow, thereby reducing the noise caused by the backflow of the airflow.

In some embodiments, a first air inlet is formed on the casing, a second air inlet is formed under the impeller, and the return cavity is used to guide gas from the first air inlet into the Second air intake.

In some embodiments, the first air inlet is distributed along the circumferential direction of the housing, the first air inlet annularly surrounds the recirculation chamber, and the recirculation chamber is located at the second air inlet directly below the .

In some embodiments, the return cavity is formed at the bottom end of the impeller casing, and the return cavity is basically in the shape of a trumpet with a narrow top and a wide bottom.

In some embodiments, the power system further includes a diffuser disposed downstream of the airflow generated by the impeller, and the diffuser is connected to the impeller casing.

In some embodiments, a motor housing for fixing the motor is formed on the outside of the motor, the motor and the motor housing are arranged between the diffuser and the impeller, the motor housing and the impeller housing connection.

The bladeless fan according to a preferred embodiment of the present invention includes a machine head and the base described in any one of the above-mentioned embodiments, and the base communicates with the machine head to send the airflow generated by the impeller into the machine head.

In some embodiments, a ventilation pipe is provided between the base and the handpiece to send the airflow generated by the impeller into the handpiece.

In some embodiments, the handpiece is provided with nozzles for spraying the airflow inside the handpiece.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of a base for a bladeless fan according to a preferred embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the level of the first feature is higher than that of the second feature. "Below", "below" and "under" the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the level of the first feature is smaller than that of the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

Please refer to FIG. 1 , a base 10 for a bladeless fan according to a preferred embodiment of the present invention includes a casing 12 and a power system 14 . The power system 14 is accommodated in the housing 12 , and the power system 14 includes an impeller housing 140 , an impeller 142 and a motor 144 . The impeller housing 140 is erected on the housing 12 , the impeller 142 is disposed in the impeller housing 140 , the motor 144 is used to drive the impeller 142 , and the impeller housing 140 is formed with a return cavity 146 to prevent air flow back.

In the base 10 for a bladeless fan according to the preferred embodiment of the present invention, since the impeller housing 140 is formed with a backflow cavity 146, the backflow cavity 146 can prevent the backflow of the airflow, thereby reducing the noise caused by the backflow of the airflow.

In this embodiment, a first air inlet 120 is formed on the casing 12, a second air inlet 148 is formed under the impeller 142, and the recirculation chamber 146 is used to guide gas from the first air inlet 120 into the second air inlet. Mouth 148.

In this way, the air flow from the first air inlet 120 to the second air inlet 148 can be guided by the recirculation chamber 146 , and a high-speed air flow moving upward is formed under the high-speed rotation of the impeller 142 , and the recirculation chamber 146 can prevent the air flow from recirculating and reduce noise.

In this embodiment, the first air inlets 120 are distributed along the circumferential direction of the housing 12 , and the first air inlets 120 annularly surround the return chamber 146 , and the return chamber 146 is located directly below the second air inlet 148 . Wherein, the first air inlet 120 is composed of a plurality of circular holes and is in the shape of a grid.

In this way, the return cavity 146 can better guide the airflow from the first air inlet 120 into the second air inlet 148 .

In this embodiment, the return cavity 146 is formed at the bottom of the impeller housing 140 , and the return cavity 146 is basically in the shape of a trumpet with a narrow top and a wide bottom.

In this way, the return cavity 146 is basically in the shape of a trumpet with a narrow top and a wide bottom, which can effectively prevent the backflow of the airflow, thereby reducing the noise caused by the backflow of the airflow.

In this embodiment, the return cavity 146 is integrally formed with the impeller housing 140 .

In this way, the assembly process is reduced, the installation and disassembly are convenient, the production efficiency is improved, and the impact resistance and stability of the impeller shell 140 are improved.

In this embodiment, the power system 14 further includes a diffuser 14 a, which is disposed downstream of the airflow generated by the impeller 142 , and the diffuser 14 a is connected to the impeller casing 140 .

In this way, the base 10 is provided with a diffuser 14 a that can boost and decelerate the high-speed airflow generated by the impeller 142 and guide the high-pressure airflow to move upward.

In this embodiment, the motor 144 is formed with a motor casing 14b for fixing the motor 144 , the motor 144 and the motor casing 14b are arranged between the diffuser 14a and the impeller 142 , and the motor casing 14b is connected to the impeller casing 140 .

In this way, the motor housing 14 b positions and supports the motor 144 , preventing the motor 144 from shaking in the base 10 and causing damage.

Specifically, the shell 12 is formed with an annular support portion 122 from the inner surface, the power system 14 is erected on the support portion 122 , and the impeller casing 140 is clamped on the support portion 122 .

The bladeless fan in a preferred embodiment of the present invention includes a machine head and the base 10 of any of the above-mentioned embodiments, and the base 10 communicates with the machine head to send the airflow generated by the impeller 142 into the machine head.

In the bladeless fan of the preferred embodiment of the utility model, since the impeller shell 140 is formed with a backflow cavity 146, the backflow cavity 146 can prevent the backflow of the airflow, thereby reducing the noise caused by the backflow of the airflow.

In this embodiment, a ventilation pipe is provided between the base 10 and the machine head to send the airflow generated by the impeller 142 into the machine head.

In this way, the base 10 and the machine head are connected through the air duct to send the high-pressure airflow generated by the base 10 into the machine head.

In this embodiment, the handpiece is provided with nozzles for spraying the airflow inside the handpiece.

In this way, the high-pressure air flow in the handpiece can be ejected from the nozzle.

Specifically, the base 10 is substantially cylindrical, and the housing 12 is provided with a first air inlet 120 that protrudes outwards to increase the space for containing gas and thus increase the air intake. The ventilation pipe is sealed and connected with the upper end of the base 10 and the lower end of the machine head. The machine head is basically ring-shaped, and the front end of the machine head is provided with a nozzle, which is in the shape of a slit and the width of the slit is about 1 mm to 1.5 mm. The high-speed airflow generated by the high-speed rotation of the impeller 142 of the base 10 enters the air duct through the pressurization and deceleration of the diffuser 14a, enters the cavity of the machine head through the air duct, and the high-pressure airflow in the cavity of the machine head passes through the air duct of the machine head. The nozzle sprays out and entrains the air around the machine head to form a wind.

In the description of this specification, descriptions that refer to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific examples", or "some examples" etc. mean that the embodiments are combined A specific feature, structure, material, or characteristic described or exemplified is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (9)

1. A base for a bladeless fan, comprising: A housing, on which a first air inlet is formed, the housing is cylindrical and protrudes radially outward at the place where the first air inlet is opened; and The power system housed in the housing, the power system includes an impeller housing erected on the housing, an impeller disposed in the impeller housing, and a motor for driving the impeller, the impeller housing A backflow chamber is formed to prevent backflow of air; The bottom section of the impeller housing is bent inwards and upwards to form the return cavity and an annular groove whose opening is directly blocked by the bottom section of the impeller. 2. The base for a bladeless fan according to claim 1, wherein a first air inlet is formed on the housing, a second air inlet is formed under the impeller, and the backflow A cavity is used to direct gas from the first gas inlet into the second gas inlet. 3. The base for a bladeless fan according to claim 2, characterized in that, the first air inlets are distributed along the circumferential direction of the housing, and the first air inlets annularly surround the The recirculation chamber is located directly below the second air inlet. 4 . The base for a bladeless fan according to claim 1 , wherein the return cavity is formed at the bottom of the impeller casing, and the return cavity is basically in the shape of a trumpet with a narrow top and a wide bottom. 5. The base for a bladeless fan according to claim 1, wherein the power system further comprises a diffuser, the diffuser is arranged downstream of the airflow generated by the impeller, and the A diffuser is connected to the impeller housing. 6. The base for a bladeless fan according to claim 5, wherein a motor casing for fixing the motor is formed outside the motor, and the motor and the motor casing are arranged on the expander. Between the compressor and the impeller, the motor casing is connected to the impeller casing. 7. A bladeless fan, characterized in that it comprises: nose; and The base for a bladeless fan according to any one of claims 1-6, wherein the base communicates with the machine head to send the airflow generated by the impeller into the machine head. 8 . The bladeless fan according to claim 7 , wherein a ventilation pipe is provided between the base and the machine head to send the airflow generated by the impeller into the machine head. 9 . 9 . The bladeless fan according to claim 8 , wherein the head is provided with nozzles for spraying the airflow inside the head. 10 .