TWI822553B - Dustproof heat dissipation fan - Google Patents

Abstract

This disclosure is directed to a dustproof heat dissipation fan connected with an impeller having a rotor and a shaft, the fan has: a carrier seat, a dustproof cover structure, a circuit board and a stator assembly. The dustproof cover structure connected to the carrier seat has a cover connected to a hollow shaft sleeve having at least one bearing, the shaft is inserted in the at least one bearing. An opening is defined at which the carrier seat is connected to the dustproof cover structure. The circuit board is disposed at a position corresponding to the opening for covering the opening. The stator assembly is wrapped in the dustproof cover structure and disposed between the dustproof cover structure and the circuit board, and the stator assembly is surrounded by the rotor and separated from the rotor by the cover body. Therefore, the stator assembly is prevented from dust.

Description

Cooling fan with dust prevention function

This application relates to a cooling fan, and in particular, refers to a cooling fan with a dust prevention function.

The cooling fan mainly includes a frame, a stator assembly, a circuit board, an impeller and a rotor. The cooling fan uses the airflow caused by the impeller to dissipate heat to achieve the purpose of heat dissipation.

However, since heat is dissipated by inducing airflow, dust in the air will of course follow the airflow into the stator assembly. These dusts will adhere to the stator assembly and have a negative impact on the stator assembly. Conventional cooling fans are not dust-proof. Design has been criticized for a long time.

Therefore, how to improve the above-mentioned shortcomings of the prior art is a major issue that the creator of the present application urgently wants to solve.

The purpose of this application is to provide a cooling fan with a dust prevention function, which can use a dust cover structure connected to the bearing seat to produce a dust-proof effect on the stator assembly.

In order to achieve the above object, the present application provides a cooling fan with dust prevention function, which is connected to an impeller equipped with a rotor and a spindle and includes: a bearing seat; a dust cover structure connected to the bearing seat and including a The cover body and a hollow bushing are provided with at least one bearing in the hollow bushing, and the at least one bearing is plugged into the spindle. The bearing seat forms an opening where it is connected to the dust cover structure; a circuit board , is configured corresponding to the opening position and covers the opening; and a stator assembly is wrapped in the dust cover structure and between the circuit board, and the stator assembly is surrounded by the rotor through the cover body.

Compared with the previous technology, this application has the following effects: by connecting a dust cover structure to the bearing seat, and the stator component is wrapped in the dust cover structure and between the circuit board, dust can be prevented from entering the stator component and has dust resistance. Effect.

The detailed description and technical content of the present application are described below with reference to the drawings. However, the attached drawings are only for reference and illustration and are not intended to limit the present application.

This application provides a cooling fan with a dust prevention function. As shown in Figure 3, it is mainly used to prevent dust from entering the stator assembly 5.

As shown in Figures 1 to 3, the cooling fan (hereinafter referred to as the cooling fan) with dust prevention function in this application is connected to an impeller 7 and includes: a bearing seat 1, a dust cover structure 2, at least one bearing 3, and a circuit The plate 4 and the stator assembly 5 also include a cover 6 in one embodiment. The number of bearings 3 is not limited in this application. It can be one or more than two. In this embodiment, two are taken as an example for description.

It should be noted that the impeller 7 has a hub 71 and a plurality of fan blades 72. Each fan blade 72 is connected around the hub 71. The hub 71 is fixed with a spindle 711, and the rotor 8 is arranged in the hub 71.

The dust cover structure 2 is connected to the top surface of the bearing base 1. The dust cover structure 2 has an accommodation space S as shown in Figure 2 and includes a cover body 21 and a hollow bushing 22 connected to each other. The accommodation space S It is formed between the cover body 21 and the hollow sleeve 22 .

The bearing base 1 is formed with an opening (not marked with an element symbol) at the point where it is connected to the dust cover structure 2 . In one embodiment, the cover body 21 is formed with a first recessed portion 211 corresponding to the opening position, and the bearing base 1 is formed with a second recessed portion 212 corresponding to the opening position.

The circuit board 4 is arranged corresponding to the opening position and covers the opening. This application does not limit how the circuit board 4 is configured to cover the opening. In this embodiment, the circuit board 4 is disposed in the first recess 211 as an example, so that the circuit board 4 covers the corresponding opening.

The stator assembly 5 is accommodated in the accommodation space S and is wrapped between the dust cover structure 2 and the top surface of the circuit board 4 , so that the stator assembly 5 can be surrounded by the rotor 8 through the dust cover structure 2 .

The two aforementioned bearings 3 are provided in the hollow sleeve 22 of the dust cover structure 2 . The spindle 711 of the impeller 7 is rotatably inserted into the two bearings 3 so that the rotor 8 driven by the hub 71 can pass through the cover body 21 around the stator assembly 5.

Thereby, as shown in Figure 3, the cooling fan of the present application is connected to the dust cover structure 2 on the bearing base 1, and the stator assembly 5 is wrapped in the dust cover structure 2 and between the circuit board 4, so it can prevent dust. Enter stator assembly 5. It should be noted that when the present application can prevent dust from entering the stator assembly 5 , it can avoid adverse effects on the stator assembly 5 and the circuit board 4 due to dust adhering to the stator assembly 5 and the circuit board 4 .

In detail, the hollow bushing 22 is inserted into and through the circuit board 4 as shown in Figure 2, so that the stator assembly 5 can be wrapped between the cover 21, the hollow bushing 22 and the circuit board 4 to ensure a dust-proof effect. .

The cover body 21 has a cover plate 215, and the hollow sleeve 22 penetrates the cover plate 215, so that the hollow sleeve 22 forms a perforated part 23, and the perforated part 23 allows the mandrel 711 to pass through. Specifically, as shown in FIG. 2 , the perforated member 23 includes two bearing chambers 231 and a channel 232 . The channel 232 is connected and communicated between the two bearing chambers 231 , so as to position each bearing 3 in each bearing chamber 231 .

It should be noted that the dust cover structure 2 and the bearing base 1 are integrally formed with each other, so as to have a better dust-proof effect because there is no connection gap. In detail, the bearing base 1 is integrally connected to the cover body 21 and is formed with the aforementioned opening, while the hollow sleeve 22 protrudes integrally from the cover body 21 .

In one embodiment, as still shown in FIGS. 1 to 3 , the cooling fan of the present application further includes a cover 6 , and the aforementioned second recessed portion 212 is integrally recessed from the bottom surface of the bearing base 1 toward the top surface. A recessed portion 211 is formed by radially expanding the cylindrical cover 21 at the corresponding opening. The cover 6 is disposed in the second recessed portion 212, which can further enhance the dust-proof effect.

It should be noted that the area of the second recessed portion 212 is greater than the area of the first recessed portion 211, and the area of the first recessed portion 211 is greater than the diameter of the cover 21, so that the cover 6 can seal the entire opening, and the cover 6 can seal the entire opening. 6 can be matched with the cover 21 to cover the entire circuit board 4 and the entire stator assembly 5 to prevent dust.

It should be noted that the circuit board 4 and the cover 6 are spaced apart from each other to form a space (component symbol is not indicated), and the protruding end of the hollow sleeve 22 extends out of the circuit board 4 and It is located in the separation space to ensure that the aforementioned accommodation space S is formed between the cover 21 , the hollow sleeve 22 and the circuit board 4 .

To sum up, the cooling fan with dust prevention function in this application can indeed achieve the expected purpose of use and solve the deficiencies of the previous technology. It meets the requirements for invention patent application. Please file an application in accordance with the patent law. Please check it carefully and grant approval. This patent is used to protect the rights of the creator of this application.

The above are only the best possible embodiments of the present application, and do not limit the patent scope of the present application. All equivalent structural changes made by using the description and drawings of the present application are deemed to be included in the present application. Within the scope of rights, it shall be stated clearly.

1: Bearing seat 2: Dust cover structure 21: Cover body 211: First depression 212: Second depression 215:Cover 22: Hollow bushing 23: Perforated parts 231:Bearing room 232:Channel 3:Bearing 4: Circuit board 5:Stator assembly 6:Block 7: Impeller 71:wheel hub 711: mandrel 72:Fan blade 8:Rotor S: Accommodation space

Figure 1 is a three-dimensional exploded schematic diagram of the cooling fan of this application.

Figure 2 is a schematic cross-sectional view of the bearing base, dust cover structure, stator assembly and circuit board of the cooling fan of the present application after assembly.

Figure 3 is a schematic cross-sectional view of the application according to Figure 1 after assembly.

1: Bearing seat

2: Dust cover structure

21: Cover body

211: First depression

212: Second depression

22: Hollow bushing

231:Bearing room

3:Bearing

4: Circuit board

5:Stator assembly

6:Block

7: Impeller

71:wheel hub

711: mandrel

8:Rotor

S: Accommodation space

Claims (9)

A cooling fan with dust prevention function is connected to an impeller equipped with a rotor and a spindle and includes: a bearing base; A dust cover structure is connected to the bearing seat and includes a cover body and a hollow bushing connected to each other. At least one bearing is provided in the hollow bushing, and the at least one bearing is plugged into the spindle. The bearing seat An opening is formed at the connection point with the dust cover structure; A circuit board configured corresponding to the opening position and covering the opening; and The stator assembly is wrapped between the dust cover structure and the circuit board, and the stator assembly is surrounded by the rotor through the cover body. The cooling fan with dust prevention function as claimed in claim 1, wherein the hollow sleeve penetrates the circuit board, and the stator assembly is wrapped between the cover, the hollow sleeve and the circuit board. The cooling fan with dust prevention function as claimed in claim 1, wherein the cover body has a cover plate, the hollow sleeve penetrates the cover plate and forms a through hole in the hollow sleeve. The cooling fan with dust prevention function as claimed in claim 3, wherein there are two bearings, and the perforated member includes two bearing chambers connected and communicated with each other and a channel, the channel is connected between the two bearing chambers, Each bearing is correspondingly arranged in each bearing chamber. The cooling fan with dust prevention function as claimed in claim 1, further includes a cover, the cover is formed with a first recessed portion corresponding to the opening position, and the bearing base is formed with a second recessed portion corresponding to the opening position. The circuit board is disposed in the first recessed part, and the cover is disposed in the second recessed part. The cooling fan with dust prevention function as claimed in claim 5, wherein the area of the second recessed part is larger than the area of the first recessed part, and the area of the first recessed part is larger than the diameter of the cover. The cooling fan with dust prevention function as described in claim 5, wherein the hollow bushing protrudes integrally from the cover, and the protruding end of the hollow bushing integrally protrudes to the circuit board and the circuit board. The distance between covers. The cooling fan with dust prevention function as claimed in claim 1, wherein the dust cover structure and the bearing base are integrally formed with each other. The cooling fan with dust prevention function as claimed in claim 8, wherein the cover system is integrally connected to the bearing base.

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