Cooling fan with dust prevention function

Abstract

A cooling fan with a dust prevention function can be connected with an impeller provided with a rotor and a mandrel and comprises a bearing seat, a dust cover structure, a circuit board and a stator assembly. The dustproof cover structure is connected to the bearing seat and comprises a cover body and a hollow shaft sleeve provided with at least one bearing, the cover body and the hollow shaft sleeve are connected with each other, the mandrel is inserted into the at least one bearing, and an opening is formed in the joint of the bearing seat and the dustproof cover structure; the circuit board is configured corresponding to the opening position and covers the opening; the stator assembly is wrapped between the dust cover structure and the circuit board, and the stator assembly is surrounded by the rotor across the cover body. Therefore, the dustproof effect of preventing dust from entering the stator assembly can be achieved.

Description

Technical Field

[0001] The present application relates to a cooling fan, and in particular to a cooling fan with a dust prevention function. Background Art

[0002] The cooling fan mainly includes a frame, a stator assembly, a circuit board, an impeller and a rotor. The cooling fan dissipates heat through the airflow driven by the impeller, thereby achieving the purpose of heat dissipation.

[0003] However, since heat is dissipated by inducing airflow, dust in the air will of course follow the airflow into the stator assembly. The dust will adhere to the stator assembly and have an adverse effect on the stator assembly. However, conventional cooling fans do not have a dust-proof design, which has long been criticized.

[0004] Therefore, how to improve the above-mentioned deficiencies of the prior art is a major issue that the inventors of this application are eager to solve. Summary of the invention

[0005] The purpose of the present application is to provide a heat dissipation fan with a dust prevention function, which can achieve a dust prevention effect on a stator component by connecting a dust cover structure to a bearing base.

[0006] In order to achieve the above-mentioned purpose, the present application provides a heat dissipation fan with a 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, which is connected to the bearing seat and includes a cover body and a hollow sleeve connected to each other, at least one bearing is arranged in the hollow sleeve, and the at least one bearing is inserted with the spindle, and the bearing seat is formed with an opening at the connection with the dust cover structure; a circuit board is configured corresponding to the opening position and covers the opening; and a stator assembly, which is enclosed between the dust cover structure and the circuit board, and the stator assembly is surrounded by the rotor through the cover body.

[0007] Compared with the prior art, the present application has the following effects: by connecting a dust cover structure to the bearing seat, and the stator component being enclosed between the dust cover structure and the circuit board, dust can be prevented from entering the stator component, thereby achieving a dustproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a three-dimensional exploded schematic diagram of the heat dissipation fan of the present application.

[0009] Figure 2 It is a cross-sectional schematic diagram of the combined support base, dust cover structure, stator assembly and circuit board in the heat dissipation fan of the present application.

[0010] Figure 3 This application is based on Figure 1 Schematic diagram of the cross section after assembly DETAILED DESCRIPTION

[0011] The detailed description and technical contents of the present application are described below with reference to the accompanying drawings. However, the accompanying drawings are only provided for reference and explanation and are not intended to limit the present application.

[0012] The present application provides a heat dissipation fan with dust prevention function, such as Figure 3 The structure shown is mainly used to prevent dust from entering the stator assembly 5.

[0013] like Figures 1 to 3 As shown, the heat dissipation fan with dust prevention function (hereinafter referred to as the heat dissipation fan) of the present application is connected to an impeller 7 and includes: a bearing seat 1, a dust cover structure 2, at least one bearing 3, a circuit board 4 and a stator assembly 5, and in one embodiment, also includes a cover 6. The present application does not limit the number of bearings 3, which can be one or more than two. In this embodiment, two bearings are used as an example for description.

[0014] It should be noted that the impeller 7 has a hub 71 and a plurality of blades 72 , each blade 72 is connected around the hub 71 , a spindle 711 is fixed to the hub 71 , and the rotor 8 is disposed inside the hub 71 .

[0015] The dust cover structure 2 is connected to the top surface of the support base 1, and the dust cover structure 2 has the following Figure 2 The accommodating space S shown includes a cover body 21 and a hollow sleeve 22 which are connected to each other. The accommodating space S is formed between the cover body 21 and the hollow sleeve 22 .

[0016] The support base 1 is formed with an opening (not indicated by a symbol) at the connection between the support base 1 and the dust cover structure 2. In one embodiment, the cover body 21 is formed with a first recessed portion 211 at a position corresponding to the opening, and the support base 1 is formed with a second recessed portion 212 at a position corresponding to the opening.

[0017] The circuit board 4 is disposed at the position corresponding to the opening and covers the opening. The present application does not limit how the circuit board 4 is disposed and covers the opening. In this embodiment, the circuit board 4 is disposed in the first recessed portion 211 as an example for explanation, so that the circuit board 4 covers the opening.

[0018] The stator assembly 5 is accommodated in the accommodating space S and is covered 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 .

[0019] The two bearings 3 are disposed in the hollow sleeve 22 of the dust cover structure 2 , and 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 surround the stator assembly 5 through the cover body 21 .

[0020] By this, Figure 3 As shown, the heat dissipation fan of the present application is connected to the support base 1 with a dust cover structure 2, and the stator assembly 5 is covered between the dust cover structure 2 and the circuit board 4, so that dust can be prevented from entering the stator assembly 5. It should be noted that when the present application can prevent dust from entering the stator assembly 5, it can avoid the stator assembly 5 and the circuit board 4 from being adversely affected by dust adhering to the stator assembly 5 and the circuit board 4.

[0021] In detail, the hollow sleeve 22 is as follows Figure 2 As shown, the stator assembly 5 is inserted and penetrates the circuit board 4, so that the stator assembly 5 can be covered between the cover 21, the hollow sleeve 22 and the circuit board 4, so as to ensure a dustproof effect.

[0022] The housing 21 has a cover plate 215, and the hollow sleeve 22 passes through the cover plate 215, so that the hollow sleeve 22 forms a perforated member 23, and the perforated member 23 allows the spindle 711 to pass through. Figure 2 As shown, the perforated member 23 includes two bearing chambers 231 and a channel 232 . The channel 232 connects and communicates between the two bearing chambers 231 , so that each bearing 3 is positioned in each bearing chamber 231 .

[0023] It should be noted that the dust cover structure 2 is integrally formed with the support base 1 so as to have a better dustproof effect due to the absence of a connection gap. Specifically, the support base 1 is integrally connected to the cover body 21 and has the aforementioned opening, while the hollow sleeve 22 is integrally protruded from the cover body 21.

[0024] In one embodiment, Figures 1 to 3 As shown, the heat dissipation fan of the present application also includes a cover 6. The aforementioned second recessed portion 212 is formed by being recessed from the bottom surface of the support base 1 toward the top surface, and the first recessed portion 211 is formed by radially expanding the cylindrical cover body 21 at the corresponding opening. The cover 6 is arranged in the second recessed portion 212, so as to further enhance the dustproof effect.

[0025] It should be noted that the area of ​​the second recessed portion 212 is larger than the area of ​​the first recessed portion 211, and the area of ​​the first recessed portion 211 is larger than the diameter of the cover body 21, so that the cover 6 can seal the entire opening, and the cover 6 can cooperate with the cover body 21 to cover the entire circuit board 4 and the entire stator assembly 5 to prevent dust.

[0026] It should also be noted that the circuit board 4 and the cover 6 are spaced apart from each other to form a spacing space (component symbols are not indicated), and the protruding end of the aforementioned hollow sleeve 22 extends out of the circuit board 4 and is located in the spacing space, so as to actually form the aforementioned accommodating space S between the cover body 21, the hollow sleeve 22 and the circuit board 4.

[0027] In summary, the cooling fan with dust prevention function of this application can indeed achieve the expected purpose of use and solve the shortcomings of the previous technology. It meets the requirements for applying for a new patent. Therefore, an application is filed in accordance with the Patent Law. Please carefully examine and approve the patent in this case to protect the rights of the creator of this application.

[0028] The above is only the preferred embodiment of the present application, and does 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 also included in the scope of the rights of the present application and are hereby stated.

Claims

1. A heat dissipation fan with dust prevention function, connected to an impeller having a rotor and a spindle and comprising: A bearing seat; A dust cover structure is connected to the bearing seat and includes a cover body and a hollow sleeve connected to each other, At least one bearing is arranged in the hollow sleeve, the spindle is inserted into the at least one bearing, and an opening is formed in the bearing seat where it is connected to the dust cover structure; a circuit board, arranged corresponding to the opening position and covering the opening; And a stator assembly is enclosed between the dust cover structure and the circuit board, and the stator assembly is surrounded by the rotor through the cover body.

2. A cooling fan with dust prevention function as described in claim 1, wherein the hollow sleeve passes through the circuit board, and the stator assembly is enclosed between the cover, the hollow sleeve and the circuit board.

3. A cooling fan with dust prevention function as described in claim 1, wherein the cover body has a cover plate, and the hollow sleeve passes through the cover plate to form a perforated member in the hollow sleeve.

4. A cooling fan with dust prevention function as described in claim 3, wherein the bearings are arranged in two, the perforated member comprises two bearing chambers connected and communicated with each other and a channel, the channel is connected between the two bearing chambers, and each bearing is correspondingly arranged in each bearing chamber.

5. The heat dissipation fan with dust prevention function as described in claim 1 further includes a cover, the cover body has a first recessed portion formed corresponding to the opening position, the support seat has a second recessed portion formed corresponding to the opening position, the circuit board is arranged in the first recessed portion, and the cover is arranged in the second recessed portion.

6. The cooling fan with dust prevention function as described in claim 5, wherein the area of ​​the second recessed portion is larger than the area of ​​the first recessed portion, and the area of ​​the first recessed portion is larger than the diameter of the cover body.

7. A cooling fan with dust prevention function as described in claim 5, wherein the hollow sleeve is integrally protruded from the cover body, and the protruding end of the hollow sleeve protrudes to the interval between the circuit board and the cover.

8. The cooling fan with dust prevention function as described in claim 1, wherein the dust cover structure and the supporting base are integrally formed with each other.

9. The cooling fan with dust prevention function as described in claim 8, wherein the cover system is integrally connected to the supporting base.

Images