CN111911429B

CN111911429B - fan

Info

Publication number: CN111911429B
Application number: CN201910383305.8A
Authority: CN
Inventors: 吴永强; 康瑞祥; 刘维亮; 杨忠; 严凤喜
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2022-02-11
Anticipated expiration: 2039-05-08
Also published as: CN111911429A

Abstract

The invention provides a fan, which comprises a bracket, a motor, a pulley reversing mechanism, a first fan blade and a second fan blade. The motor is mounted on the bracket, and the motor includes a motor body and a motor shaft. The pulley reversing mechanism includes a pulley reversing assembly and an output shaft, the motor shaft is connected with the pulley reversing assembly, and the pulley reversing assembly is connected with the output shaft. The first fan blade is mounted on the motor shaft. The second fan blade is installed on the output shaft, the second fan blade and the first fan blade are arranged on the same side of the motor body, and the rotation direction of the second fan blade is opposite to the rotation direction of the first fan blade. The present invention corrects the wind force deviating from the axial direction through the reverse rotation structure of the double fan blades to increase the air outlet volume along the axial direction, so that the fan can reduce the rotational speed of the motor and the fan blades when the fan needs to deliver a large air volume. Thereby reducing the large noise caused by the high-speed rotation of the motor and the fan blades.

Description

Fan with cooling device

Technical Field

The invention relates to the technical field of household appliances, in particular to a fan.

Background

The electric fan can be classified into an axial flow fan, a cross flow fan, a centrifugal fan and the like according to different air outlet modes. Wherein, when the axial flow fan works, the blades push the air to flow in the same direction with the shaft. The axial flow fan is suitable for a ventilating fan in a small and medium warehouse or a place with a large indoor area, or some scenes with long air supply distance and large air supply amount. However, the axial flow fan needs to increase the rotation speed of the motor if a large amount of air is supplied, and thus generates a large noise.

Disclosure of Invention

The invention mainly aims to provide a fan, and aims to solve the technical problem that an axial flow fan in the prior art generates large noise when delivering large air volume.

In order to achieve the purpose, the fan provided by the invention comprises a support, a motor, a belt wheel reversing mechanism, a first fan blade and a second fan blade. The motor is arranged on the support and comprises a motor body and a motor shaft. The belt wheel reversing mechanism comprises a belt wheel reversing assembly and an output shaft, the motor shaft is connected with the belt wheel reversing assembly, and the belt wheel reversing assembly is connected with the output shaft. The first fan blade is arranged on the motor shaft. The second fan blade is arranged on the output shaft, the second fan blade and the first fan blade are arranged on the same side of the motor body, and the rotating direction of the second fan blade is opposite to that of the first fan blade.

In an embodiment, the first fan blade is installed at an end of the motor shaft, which is far away from the motor body, and the pulley reversing mechanism and the second fan blade are both arranged between the motor body and the first fan blade.

In one embodiment, two ends of the output shaft are through, and the motor shaft passes through the pulley reversing assembly and the output shaft.

In one embodiment, the belt wheel reversing assembly includes a belt, an input belt wheel, a first reversing belt wheel, a second reversing belt wheel and an output belt wheel, the input belt wheel is connected with the motor shaft, the input belt wheel is in transmission connection with the output belt wheel through the first reversing belt wheel, the second reversing belt wheel and the belt, and the output shaft is connected with the output belt wheel.

In an embodiment, the pulley reversing assembly further includes a rotating shaft perpendicular to the motor shaft, the first reversing pulley and the second reversing pulley are disposed opposite to each other, and the first reversing pulley and the second reversing pulley are both mounted on the rotating shaft.

In one embodiment, the pulley reversing mechanism further comprises a pulley support to which the pulley reversing assembly is mounted.

In an embodiment, the pulley support includes a pulley front support and a pulley rear support, the input pulley is mounted on the pulley front support, the output pulley is mounted on the pulley rear support, the pulley front support is provided with two first mounting holes arranged oppositely, the pulley rear support is provided with two second mounting holes arranged oppositely, and the rotating shaft passes through the first mounting holes and the second mounting holes to be mounted on the pulley support.

In an embodiment, the belt wheel reversing mechanism and the second fan blade are both disposed at an end of the motor shaft away from the motor body, and the first fan blade is disposed between the motor body and the second fan blade.

In one embodiment, the motor shaft is disposed coaxially with the output shaft.

In an embodiment, the fan further includes an air duct, and an air inlet and an air outlet are respectively formed at two ends of the air duct.

According to the technical scheme, the belt wheel reversing mechanism is arranged on the motor shaft, the first fan blade is directly arranged on the motor shaft, and the second fan blade is arranged on the belt wheel reversing mechanism, so that the rotating directions of the second fan blade and the first fan blade are opposite. Through the structure of the double-fan-blade reverse rotation, the wind power deviating from the axial direction is corrected to increase the air output along the axial direction, so that the rotating speed of the motor and the fan blades can be reduced under the condition that the fan needs to convey large air output, and the large noise generated by the high-speed rotation of the motor and the fan blades is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an internal structure of a fan according to an embodiment of the present invention;

FIG. 2 is an exploded view of the fan of FIG. 1;

FIG. 3 is a schematic structural view of a belt direction-changing mechanism in the fan shown in FIG. 1;

FIG. 4 is an exploded view of the pulley diverter mechanism of the fan of FIG. 1;

fig. 5 is another schematic view of the pulley reversing mechanism of the fan shown in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Fan with cooling device	10	Support frame
20	Electric machine	21	Motor body
				22	Motor shaft	30	Belt wheel reversing mechanism
31	Belt wheel reversing assembly	311	Leather belt
				312	Input belt wheel	313	First reversing belt wheel
314	Second reversing belt wheel	315	Output belt wheel
				316	Rotating shaft	32	Output shaft
33	Belt wheel front support	331	First mounting hole
				34	Belt wheel rear support	341	Second mounting hole
35	Belt wheel front shell	36	Belt wheel rear shell
				40	Mounting plate	50	First fan blade
60	Second fan blade	70	Air duct
				80	Net cover

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 and 2, in an embodiment of the present invention, a fan 1 includes a bracket 10, a motor 20, a pulley reversing mechanism 30, a first blade 50, and a second blade 60. Wherein, motor 20 is installed at support 10, and motor 20 includes motor body 21 and motor shaft 22. The pulley reversing mechanism 30 comprises a pulley reversing assembly 31 and an output shaft 32, the motor shaft 22 is connected with the pulley reversing assembly 31, and the pulley reversing assembly 31 is connected with the output shaft 32. The first fan 50 is mounted on the motor shaft 22. The second fan blade 60 is mounted on the output shaft 32, the second fan blade 60 and the first fan blade 50 are arranged on the same side of the motor body 21, and the rotation direction of the second fan blade 60 is opposite to that of the first fan blade 50.

It should be noted that, the axial flow fan adopts the motor to drive the fan blade fixed on the motor shaft to rotate, thereby pushing the air to flow in the same direction as the shaft, the air-out mode is direct, and the axial flow fan is suitable for the scene that needs the air supply distance to be longer and needs the air supply amount to be larger. However, the air directly pushed by the blades of the axial flow fan has not only axial momentum, but also momentum perpendicular to the axial direction generated by the air due to the friction between the blades and the air, so that the resistance applied to the air during the axial movement is increased rapidly, which results in an undesirable air supply distance and air output along the axial direction. In order to ensure a large air output, an axial flow fan in the prior art usually employs a high-speed rotating motor to accelerate rotation of a fan blade, and thus generates a large noise.

According to the technical scheme, the belt wheel reversing mechanism is arranged on the motor shaft, the first fan blade is directly arranged on the motor shaft, and the second fan blade is arranged on the belt wheel reversing mechanism, so that the rotating directions of the second fan blade and the first fan blade are opposite. Through the structure of the double-blade reverse rotation, the wind power deviating from the axial direction is corrected to increase the air output along the axial direction, so that the rotating speed of the motor and the blades can be reduced under the condition that the fan needs to convey large air output, and the large noise generated by the high-speed rotation of the motor and the blades is reduced. In addition, only one motor is needed, and the two fan blades are arranged on the same side of the motor, so that the fan is simple in overall structure, quick to disassemble and assemble and convenient to clean.

In an embodiment, as shown in fig. 1, the first blade 50 is installed at an end of the motor shaft 22 away from the motor body 2121, and the pulley reversing mechanism 30 and the second blade 60 are both disposed between the motor body 21 and the first blade 50. Of course, in another embodiment, the pulley reversing mechanism 30 and the second fan 60 may be disposed at an end of the motor shaft 22 away from the motor body 21, and the first fan 50 is disposed between the motor body 21 and the second fan 60. It should be noted that, the second fan 60 is disposed between the motor body 21 and the first fan 50, which is more convenient for disassembling the two fans for cleaning. This is because, in the detaching process, the first fan blade 50 may be detached first, and then the second fan blade 60 may be detached continuously. If the first fan blade 50 is disposed between the motor body 21 and the second fan blade 60, when the first fan blade 50 needs to be disassembled, the second fan blade 60 needs to be disassembled first, and the belt wheel reversing mechanism 30 also needs to be disassembled, so that the disassembly and the assembly are inconvenient.

In one embodiment, the output shaft 32 extends through both ends, and the motor shaft 22 extends through the pulley reversing assembly 31 and the output shaft 32. It can be understood that since the pulley reversing mechanism 30 is disposed between the motor body 21 and the first fan 50, and the first fan 50 is installed at an end of the motor shaft 22 far from the motor body 21, the motor shaft 22 needs to penetrate through the pulley reversing assembly 31 and the output shaft 32. In another embodiment, if the pulley reversing mechanism 30 and the second fan 60 are disposed at an end of the motor shaft 22 away from the motor body 21, the output shaft 32 may be a solid shaft, and the motor shaft 22 does not need to penetrate through the pulley reversing assembly 31 and the output shaft 32. It should be noted that in the above embodiment, the output shaft 32 is disposed coaxially with the motor shaft 22, so that the occupied space of the pulley reversing mechanism 30 can be effectively reduced, and the internal structure of the fan 1 can be more tightly fitted. However, in other embodiments, especially when the pulley reversing mechanism 30 and the second fan 60 are disposed at the end of the motor shaft 22 away from the motor body 21, the output shaft 32 and the motor shaft 22 may not be coaxially disposed because the motor shaft 22 does not need to penetrate the pulley reversing assembly 31 and the output shaft 32.

Further, as shown in fig. 3 to 5, the pulley reversing assembly 31 includes a belt 311, an input pulley 312, a first reversing pulley 313, a first reversing pulley 314, and an output pulley 315, wherein the input pulley 312 is connected to the motor shaft 22, the input pulley 312 and the output pulley 315 are in transmission connection through the first reversing pulley 313, the first reversing pulley 314, and the belt 311, and the output shaft 32 is connected to the output pulley 315. In the present embodiment, the first diverting pulley 313 and the first diverting pulley 314 are respectively located on both sides of the input pulley 312 and below the input pulley 312 and the output pulley 315, and the belt 311 is looped around the upper edges of the input pulley 312 and the output pulley 315 and the lower edges of the first diverting pulley 313 and the first diverting pulley 314. The operation of the pulley reversing mechanism 30 is as follows: the motor shaft 22 drives the input pulley 312 to rotate, the input pulley 312 drives the belt 311 to move, the first reversing pulley 313 and the first reversing pulley 314 are driven by the belt 311 to rotate, the rotation directions of the two reversing pulleys are opposite, and through the reversing action of the two reversing pulleys, the belt 311 finally drives the output pulley 315 to rotate in the direction opposite to the rotation direction of the input pulley 312.

Further, as shown in fig. 3, the pulley reversing assembly 31 further includes a rotating shaft 316 perpendicular to the motor shaft 22, the first reversing pulley 313 and the first reversing pulley 314 are disposed opposite to each other, and both the first reversing pulley 313 and the first reversing pulley 314 are mounted on the rotating shaft 316. It can be appreciated that the first reversing pulley 313 and the first reversing pulley 314 are drivingly connected by the rotating shaft 316, so that the two reversing pulleys can rotate synchronously, and the stability of the whole pulley reversing assembly 31 can be maintained.

Further, the pulley reversing mechanism 30 further includes a pulley support 10, and a pulley reversing assembly 31 is mounted to the pulley support 10. In this manner, the tension of the belt 311 is maintained, as well as the stability of the overall structure of the pulley reversing assembly 31.

Further, as shown in fig. 3 and 4, the pulley support 10 includes a pulley front support 33 and a pulley rear support 34, the input pulley 312 is mounted on the pulley front support 33, the output pulley 315 is mounted on the pulley rear support 34, the pulley front support 33 is provided with two first mounting holes arranged oppositely, the pulley rear support 34 is provided with two second mounting holes arranged oppositely, and the rotating shaft 316 passes through the first mounting holes and the second mounting holes to be mounted on the pulley support 10. It can be understood that, after the first mounting hole and the second mounting hole are aligned, and the rotating shaft 316 passes through the first mounting hole and the second mounting hole, the two ends of the rotating shaft 316 pass through the two reversing pulleys, respectively, so that the reversing pulleys can be mounted on the pulley support 10.

Further, the pulley reversing mechanism 30 further includes a pulley front shell 35 and a pulley rear shell 36, wherein the pulley front shell 35 is mounted on the pulley front bracket 33, and the pulley rear shell 36 is mounted on the pulley rear bracket 34. It will be appreciated that the pulley front shell 35, the pulley front carrier 33, the pulley rear carrier 34 and the pulley rear shell 36 together enclose a pulley housing in which the input pulley 312 and the output pulley 315 are mounted. In this manner, the overall stability of the pulley reversing assembly 31 is increased, and the appearance of the pulley reversing mechanism 30 is aesthetically pleasing. The pulley reversing mechanism 30 is attached to the motor 20 via an attachment plate 40.

In this embodiment, as shown in fig. 1, the fan 1 further includes an air duct 70, an air inlet and an air outlet are formed at two ends of the air duct 70, and mesh enclosures 80 are disposed on the air inlet and the air outlet to reduce pollution and interference of an external environment to the inside of the fan 1. It is understood that the fan 1 further includes a blade cable nut, a bearing, etc., which are not described one by one.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A fan, comprising:

a support;

the motor is arranged on the bracket and comprises a motor body and a motor shaft;

the belt wheel reversing mechanism comprises a belt wheel reversing assembly and an output shaft, the motor shaft is connected with the belt wheel reversing assembly, and the belt wheel reversing assembly is connected with the output shaft;

the first fan blade is arranged on the motor shaft;

the second fan blade is arranged on the output shaft, the second fan blade and the first fan blade are arranged on the same side of the motor body, and the rotating direction of the second fan blade is opposite to that of the first fan blade;

the belt wheel reversing assembly comprises a belt, an input belt wheel, a first reversing belt wheel, a second reversing belt wheel and an output belt wheel, the input belt wheel is connected with the motor shaft, the input belt wheel is in transmission connection with the output belt wheel through the first reversing belt wheel, the second reversing belt wheel and the belt, and the output shaft is connected with the output belt wheel; the belt wheel reversing assembly further comprises a rotating shaft perpendicular to the motor shaft, the first reversing belt wheel and the second reversing belt wheel are arranged oppositely, and the first reversing belt wheel and the second reversing belt wheel are both mounted on the rotating shaft; the belt wheel reversing mechanism further comprises a belt wheel support, and the belt wheel reversing assembly is mounted on the belt wheel support; the belt wheel support comprises a belt wheel front support and a belt wheel rear support, the input belt wheel is installed on the belt wheel front support, the output belt wheel is installed on the belt wheel rear support, the belt wheel front support is provided with two first installation holes which are oppositely arranged, the belt wheel rear support is provided with two second installation holes which are oppositely arranged, and the rotating shaft passes through the first installation holes and the second installation holes to be installed on the belt wheel support.

2. The fan of claim 1, wherein the first blade is mounted on an end of the motor shaft away from the motor body, and the pulley reversing mechanism and the second blade are both disposed between the motor body and the first blade.

3. The fan of claim 2 wherein said output shaft extends through both ends and said motor shaft extends through said pulley reversing assembly and said output shaft.

4. The fan of claim 1, wherein the pulley reversing mechanism and the second fan blade are both disposed at an end of the motor shaft away from the motor body, and the first fan blade is disposed between the motor body and the second fan blade.

5. The fan of claim 4 wherein said motor shaft is disposed coaxially with said output shaft.

6. The fan as claimed in any one of claims 1 to 5, further comprising an air duct, wherein an air inlet and an air outlet are formed at two ends of the air duct, respectively.