Fan capable of dissipating heat in motor

Abstract

The utility model provides a fan capable of radiating inside a motor, which comprises a driving motor, a fixed impeller and a movable impeller, the fixed impeller and the movable impeller are connected with the driving motor, an impeller cover is mounted outside the movable impeller, the driving motor comprises a motor casing, a plurality of bottom radiating holes are arranged on the motor casing, and the bottom radiating holes are communicated with the impeller cover. A brush frame communicated with the motor shell is connected to the upper portion of the motor shell, a plurality of top face heat dissipation holes are formed in the brush frame, a gap is formed between the fixed impeller and the movable impeller, and air guide holes which are the same as the heat dissipation holes in number and matched with the heat dissipation holes in shape and position are formed in the fixed impeller. According to the draught fan, the multiple air guide holes are formed in the fixed impeller, when the draught fan works, the driving motor drives the movable impeller to rotate to form negative pressure, air flows into the motor shell from the top face heat dissipation holes and the side face heat dissipation holes and flows out from the bottom face heat dissipation holes, and therefore heat dissipation can be conducted on components in the motor shell through the air; the heat dissipation capacity in the motor shell is improved, meanwhile, a fan does not need to be additionally arranged on the driving shaft, and therefore the working efficiency of the motor cannot be lost.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan capable of dissipating heat inside a motor. Background Art

[0002] The vacuum cleaner fan is the heart of the vacuum cleaner. The vacuum cleaner fan consists of two parts: the motor part and the impeller part. Since the motor part in the vacuum cleaner fan has a very high speed requirement, generally 35,000 - 45,000 revolutions per minute, a large amount of heat will be generated. At present, the heat dissipation performance of the motor part on the market is poor, and it can only dissipate heat through the convection of the motor housing and the air, with limited heat dissipation capacity, which affects the use efficiency of the vacuum cleaner fan, and it is also impossible to directly dissipate heat from the components inside the motor housing.

[0003] In the prior art, there is also a way to dissipate heat by adding a fan inside the motor housing. However, in this way of installing the fan, since the motor drive shaft needs to drive the fan to rotate, the working efficiency of the motor will be lost. Content of the Utility Model

[0004] Therefore, the utility model provides a fan capable of dissipating heat inside a motor, which can dissipate heat inside the motor through air, thereby effectively reducing the internal temperature of the motor.

[0005] To solve the above technical problems, the utility model provides a fan capable of dissipating heat inside a motor, including a drive motor, a fixed impeller and a moving impeller connected to the drive motor. An impeller cover is installed outside the moving impeller. The drive motor includes a motor housing, and a plurality of bottom heat dissipation holes are opened on the motor housing. A brush holder air - communicated with the motor housing is connected above the motor housing, and a plurality of top heat dissipation holes are opened on the brush holder. A gap is provided between the fixed impeller and the moving impeller, and a plurality of air guiding holes with the same number and matching shape and position as the bottom heat dissipation holes are opened on the fixed impeller.

[0006] Further, the impeller cover is fixedly installed with the fixed impeller.

[0007] Further, a plurality of side heat dissipation holes are opened on the motor housing.

[0008] Further, motor bolt holes are opened on the motor housing, and fixed impeller bolt holes with the same number and used in cooperation with the motor bolt holes are opened on the fixed impeller.

[0009] Further, convex blocks are provided on the fixed impeller.

[0010] Further, the air guiding holes and the bolt holes penetrate through the convex blocks.

[0011] Further, the side wall of the air guiding hole extends towards the driving motor to form an extension part, and a buckle capable of being snapped into the bottom surface heat dissipation hole is integrally arranged at the end of the extension part. The buckle includes two buckle monomers, and a bending space is arranged between the two buckle monomers.

[0012] As described above, a blower capable of dissipating heat inside a motor of the present utility model has the following

[0013] Beneficial effects:

[0014] 1. For the blower described in the present application, by providing a plurality of air guiding holes on the fixed impeller, when working, the driving motor drives the moving impeller to rotate to form a negative pressure, and air flows into the motor housing from the top surface heat dissipation hole and the side surface heat dissipation hole, and flows out from the bottom surface heat dissipation hole. Thus, the components inside the motor housing can be dissipated heat by air, improving the heat dissipation capacity inside the motor housing. At the same time, there is no need to add a fan on the drive shaft, so the working efficiency of the motor will not be lost.

[0015] 2. Through the design of the convex block, the space between the fixed impeller and the motor housing is reduced, so that air will not flow between the two to generate turbulence, resulting in noise and a reduction in the air flow momentum, and the heat dissipation capacity can be further improved.

[0016] 3. By snapping the buckle into the bottom surface heat dissipation hole, the fixed impeller and the driving motor are fixedly installed. On the one hand, the installation is more convenient, and it is not necessary to use bolts to install the two. On the other hand, it can also make all the air flowing out from the bottom surface heat dissipation hole flow out from the air guiding hole, thereby further improving the heat dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the blower described in the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the driving motor described in the present utility model.

[0019] Figure 3 It is a schematic structural diagram of the fixed impeller in Embodiment 1 of the present utility model.

[0020] Figure 4 It is a schematic structural diagram of the fixed impeller in Embodiment 2 of the present utility model.

[0021] Figure 5 It is a cross-sectional view of the fixed impeller in Embodiment 3 of the present utility model.

[0022] Figure 6 It is a cross-sectional view of the blower in Embodiment 3 of the present utility model (the arrow indicates the air flow direction).

[0023] Figure 7Another perspective cross-sectional view of the fan described in Embodiment 3 of the present utility model.

[0024] Figure 8 Temperature comparison table of the fan described in Embodiment 3 of the present utility model after rotating for 10 minutes.

[0025] In the figure: 1, drive motor; 2, stationary impeller; 3, impeller cover; 4, drive shaft; 5, bottom heat dissipation holes; 6, air guiding holes; 7, air outlet; 8, bearing holes; 9, stationary impeller bolt holes; 10, stationary impeller housing; 11, guide vanes; 12, bumps; 13, buckles; 14, gaps; 15, brush holder; 16, top heat dissipation holes; 17, side heat dissipation holes; 18, motor bolt holes; 19, bending space; 20, buckle monomers; 21, moving impeller; 22, commutator; 23, motor housing. Detailed implementation manners

[0026] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0027] Please refer to Figures 1 to 8 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0028] Refer to Figure 1 , the present utility model provides a fan capable of dissipating heat inside the motor, including a drive motor 1, a stationary impeller 2 and a moving impeller 21 connected to the drive motor 1, and further including an impeller cover 3 wrapped outside the moving impeller 21 and fixedly connected to the stationary impeller 2.

[0029] Specifically, a bearing hole 8 is provided at the middle position of the stationary impeller 2. The output shaft of the drive motor 1 passes through the bearing hole 8 and is connected to the stationary impeller 2 by bearings, and the end of the output shaft of the drive motor 1 is fixedly connected to the moving impeller 21 through a bushing and a nut. An impeller cover 3 with an air inlet is installed outside the moving impeller, and the impeller cover 3 is fixedly installed together with the stationary impeller 2.

[0030] The drive motor 1 includes a motor housing 23, a stator, a rotor, and a drive shaft 4 fixedly connected to the rotor. Both the upper and lower ends of the drive shaft 4 extend out of the motor housing 23. After the upper end of the drive shaft 4 extends out of the motor housing 23, it is fixedly connected to a commutator 22. At the same time, a brush holder that is in air communication with the motor housing 23 is connected to the upper end of the motor housing 23. A carbon brush electrically connected to the commutator 22 is provided in the brush holder. The lower end of the drive shaft 4 extends out of the motor housing 23 and is fixedly connected to an impeller 21. The motor housing 23 is provided with a plurality of bottom heat dissipation holes 5 on the side facing the fixed impeller 2. In this embodiment, four bottom heat dissipation holes 5 are provided. The brush holder 15 is provided with a top heat dissipation hole 16. By providing the bottom heat dissipation holes 5 and the top heat dissipation hole 16, external air can flow inside the motor housing 23, so as to dissipate heat from the internal components of the motor housing 23 through the flow of air.

[0031] The fixed impeller 2 includes a fixed impeller housing 10 connected to the motor housing 23. A bearing hole 8 is provided at the middle position of the fixed impeller housing 10. A plurality of guide vanes 11 are arranged around the bearing hole 8. An air outlet 7 is provided between every two guide vanes 11. And there is a gap 14 between the fixed impeller 2 and the impeller after installation.

[0032] Embodiment 1:

[0033] Refer to Figures 2 - 3 , in this embodiment, the side surface of the motor housing 23 is provided with a plurality of side heat dissipation holes 17 to increase the air intake. At the same time, the side of the motor housing 23 facing the fixed impeller 2 is provided with a plurality of motor bolt holes 18.

[0034] A plurality of air guide holes 6 are provided on the fixed impeller housing 10 around the bearing hole 8, and fixed impeller bolt holes 9 with the same number as the motor bolt holes 18 and used in cooperation are provided. The number of the air guide holes 6 is the same as that of the bottom heat dissipation holes 5, and the shapes and positions are adapted. The fixed impeller 2 and the motor housing 23 are fixedly connected by bolts.

[0035] During specific operation, the drive motor 1 drives the impeller 21 to rotate to form a negative pressure. External air enters the impeller cover 3 from the air inlet and flows out through the air outlet 7 on the fixed impeller 2. At the same time, due to the negative pressure, external air also enters from the top heat dissipation hole and the side heat dissipation hole 17, flows inside the motor housing 23 and then flows downward through the bottom heat dissipation holes 5 and the gap 14 and then flows out from the air outlet, so as to dissipate heat from the internal components of the motor housing 23 and improve the heat dissipation capacity inside the motor housing 23.

[0036] Embodiment 2:

[0037] Refer to Figure 4, based on Embodiment 1, in this embodiment, a convex block 12 is provided on the fixed impeller 2 around the bearing hole 8, and the air guiding hole 6 and the fixed impeller bolt hole 9 penetrate through the convex block 12. The convex block 12 is integrally formed with the fixed impeller 2. After the fixed impeller is fixedly installed with the motor housing 23, the convex block 12 abuts against the bottom of the motor housing 23. Thus, through the design of the convex block 12, the space between the fixed impeller 2 and the motor housing 23 is reduced, so that air will not flow between the two to generate turbulence, resulting in noise and a reduction in air flow momentum. Instead, most of the air flows out from the air outlet. Therefore, compared with Embodiment 1, the heat dissipation capacity can be further improved.

[0038] Embodiment 3:

[0039] Refer to Figures 5 - 8 , based on Embodiment 2, in this embodiment, the side wall of the air guiding hole 6 extends towards the driving motor, and a buckle 13 is integrally provided at the end. The buckle 13 includes two buckle monomers 20, and a bending space 19 is provided between the two buckle monomers 20. When the fixed impeller 2 is installed with the driving motor 1, the buckle 13 is snapped into the bottom surface heat dissipation hole 5, so that the fixed impeller 2 and the driving motor 1 are fixedly installed. In this way, on the one hand, the installation is more convenient, and bolts are not needed to install the two. On the other hand, it can also make all the air flowing out from the bottom surface heat dissipation hole 5 flow out from the air guiding hole, thereby further improving the heat dissipation capacity.

[0040] The above embodiments only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A fan capable of dissipating heat inside a motor, characterized in that: It includes a driving motor, a stator impeller and a movable impeller connected to the driving motor and provided with an air outlet, wherein an impeller cover is installed on the outside of the movable impeller, wherein the driving motor includes a motor shell, the motor shell is provided with a plurality of bottom surface heat dissipation holes, a brush holder connected to the air of the motor shell is connected above the motor shell, the brush holder is provided with a plurality of top surface heat dissipation holes, a gap is set between the stator impeller and the movable impeller, and the stator impeller is provided with air guide holes having the same number and matching shape and position as the bottom surface heat dissipation holes.

2. A fan capable of dissipating heat inside a motor according to claim 1, characterized in that: The impeller cover is fixedly mounted to the stator impeller.

3. A fan capable of dissipating heat inside a motor according to claim 1, characterized in that: The motor housing is provided with a plurality of side heat dissipation holes.

4. A fan capable of dissipating heat inside a motor according to claim 1, characterized in that: The motor housing is provided with motor bolt holes, and the stator impeller is provided with stator impeller bolt holes which are used in conjunction with the motor bolt holes and are the same in number.

5. A fan capable of dissipating heat inside a motor according to claim 1 or 3, characterized in that: The stator impeller is provided with a convex block.

6. A fan capable of dissipating heat inside a motor according to claim 5, characterized in that: The air guide hole and the bolt hole penetrate through the protrusion.

7. A fan capable of dissipating heat inside a motor according to claim 1 or 5, characterized in that: The side wall of the air guide hole extends toward the drive motor to form an extension portion, and a buckle capable of being inserted into the bottom surface heat dissipation hole is integrally provided at the end of the extension portion, and the buckle includes two buckle monomers, and a bending space is provided between the two buckle monomers.

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