Dustproof cooling fan

Abstract

The utility model relates to a dustproof cooling fan which comprises a fan shell, an impeller and a motor assembly. The fan shell comprises an outer frame and a mounting seat connected with the outer frame, the mounting seat comprises a main body part and a surrounding wall part connected with the main body part, the main body part is provided with a dustproof ring, a dustproof groove is formed between the surrounding wall part and the dustproof ring, the main body part is axially provided with a fixing sleeve, and the fixing sleeve is arranged in the dustproof ring; the impeller is connected with the fan shell; the impeller comprises a hub and blades connected with the hub, the hub annularly sleeves the dustproof ring, and the hub is in clearance fit with the enclosure wall part; the motor assembly comprises a rotating shaft, one end of the rotating shaft is fixedly connected with the hub, and the other end of the rotating shaft extends into the fixing sleeve. According to the dustproof cooling fan, the phenomena of unsmooth operation, blockage, low rotating speed and the like of the fan caused by dust entering the dustproof cooling fan can be effectively avoided, so that the service life of the dustproof cooling fan is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation fans, in particular to a dust-proof heat dissipation fan. Background Art

[0002] As cooling fans are used more and more widely, people have higher and higher requirements for dust prevention of cooling fans. In order to better dissipate heat, cooling fans on the market are prone to increase dust accumulation while circulating air. Dust can easily enter the bearing system, causing the fan to run unsmoothly or get stuck, or have a low speed, which seriously damages the service life and working condition of the cooling fan. The entry of dust also increases the noise of the cooling fan. Utility Model Content

[0003] Based on this, it is necessary to provide a dust-proof cooling fan to address the problems such as poor dust-proof effect of existing cooling fans, dust easily entering the bearing system, causing the fan to run smoothly or get stuck, low speed, etc., seriously damaging the service life and working condition of the cooling fan, and the entry of dust also increasing the noise of the cooling fan.

[0004] A dust-proof heat dissipation fan, comprising:

[0005] A fan housing, the fan housing comprising an outer frame and a mounting seat connected to the outer frame, the mounting seat comprising a main body and a surrounding wall portion connected to the main body, the main body being provided with a dust ring, a dust groove being provided between the surrounding wall portion and the dust ring, the main body being axially provided with a fixing sleeve, the fixing sleeve being disposed within the dust ring;

[0006] An impeller connected to the fan housing; the impeller includes a hub and blades connected to the hub, the hub is sleeved outside the dust ring, and the hub is loosely fitted with the surrounding wall; and

[0007] The motor assembly includes a rotating shaft, one end of which is fixedly connected to the wheel hub, and the other end of which extends into the fixing sleeve.

[0008] The above-mentioned dust-proof heat dissipation fan can effectively reduce the chance of dust entering the interior of the hub due to the clearance between the hub and the surrounding wall. The hub ring is sleeved outside the dust ring, and a dust-proof groove is provided between the surrounding wall and the dust ring. Some dust entering the hub through the gap will also be blocked by the dust ring and eventually fall into the dust-proof groove. This can effectively prevent the fan from running smoothly, getting stuck, or having a low speed due to dust entering the interior of the dust-proof heat dissipation fan, thereby effectively extending the service life of the dust-proof heat dissipation fan.

[0009] In one embodiment, the height of the dust ring is greater than the height of the surrounding wall.

[0010] In one embodiment, dust removal paper is placed in the dustproof groove.

[0011] In one embodiment, the motor assembly further includes a rotor and a stator, wherein the rotor is fixedly mounted in the wheel hub, the stator is sleeved outside the fixed sleeve, and the rotor is wound around the stator.

[0012] In one embodiment, the main body is provided with a lower opening, the fixing sleeve is axially provided with a fixing groove, the fixing groove is communicated with the lower opening, and the end of the rotating shaft away from the hub extends into the fixing groove.

[0013] In one embodiment, the dustproof heat dissipation fan further includes a retaining spring, and a retaining groove is provided at the end of the rotating shaft away from the hub, and the retaining spring is retained in the retaining groove.

[0014] In one embodiment, the dustproof heat dissipation fan further includes a sealing cover, which is arranged on the lower opening. The sealing cover includes a sealing portion and a sleeve portion connected to the sealing portion. The sleeve portion is axially provided with a plug-in slot, and the rotating shaft extends into the plug-in slot.

[0015] In one embodiment, the cover portion is provided with a snap ring, the main body portion is provided with an embedding groove and a snap groove, the snap groove is provided in the embedding groove, the cover portion is embedded in the embedding groove, and the snap ring is snapped into the snap groove.

[0016] In one embodiment, the outer frame is integrally connected with an extension plate, and the extension plate is provided with a clamping block for fixing to the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an assembly structure diagram of a dust-proof heat dissipation fan in one embodiment of the present invention;

[0018] Figure 2 For example Figure 1 The internal structure diagram of the dust-proof cooling fan is shown;

[0019] Figure 3 for Figure 2 Enlarged view of part A;

[0020] Figure 4 for Figure 2 Magnified view of part B.

[0021] The meanings of the numbers in the accompanying drawings are:

[0022] 100-dust-proof cooling fan;

[0023] 10-fan housing, 11-outer frame, 111-extension plate, 112-clamping block, 12-mounting seat, 121-main body, 122-surrounding wall, 123-dustproof ring, 124-dustproof groove, 125-dustproof paper, 126-embedded groove, 127-clamping groove, 13-fixing sleeve, 131-fixing groove, 132-upper bearing mounting groove, 133-lower bearing mounting groove;

[0024] 20- impeller, 21- hub, 22- blades;

[0025] 30-motor assembly, 31-rotating shaft, 32-rotor, 33-stator, 34-bearing;

[0026] 40-circlip;

[0027] 50-sealing cover, 51-sealing portion, 511-clamping ring, 52-sleeve portion, 521-insertion slot. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] See also Figures 1 to 2 , is a dust-proof heat dissipation fan 100 according to an embodiment of the present invention, comprising a fan housing 10, an impeller 20 and a motor assembly 30, wherein the impeller 20 is rotatably connected to the fan housing 10, the motor assembly 30 is disposed between the fan housing 10 and the impeller 20, and the impeller 20 rotates under the drive of the motor assembly 30.

[0035] See also Figures 1 to 3The fan housing 10 includes an outer frame 11 and a mounting base 12 connected to the outer frame 11. The outer frame 11 is integrally connected to an extension plate 111, and the extension plate 111 is provided with a clamping block 112 for fixing to the radiator. The mounting base 12 includes a main body 121 and a surrounding wall 122 connected to the main body 121. The main body 121 is provided with a dust ring 123. The height of the dust ring 123 is greater than the height of the surrounding wall 122. A dust groove 124 is provided between the surrounding wall 122 and the dust ring 123. Dust removal paper is provided in the dust groove 124. The dust removal paper is electrostatic dust removal paper. Dust is adsorbed onto the dust removal paper under the action of static electricity, further reducing the probability of dust entering the motor assembly 30, thereby improving the dust prevention function of the cooling fan.

[0036] See also Figure 1 、 Figure 2 and Figure 4 The main body 121 is axially provided with a fixing sleeve 13, and the fixing sleeve 13 is arranged in the dust ring 123; the fixing sleeve 13 is axially provided with a fixing groove 131, and the main body 121 is provided with a lower opening, and the fixing groove 131 is connected to the lower opening.

[0037] See also Figures 1 to 2 The impeller 20 includes a hub 21 and blades 22 connected to the hub 21 . The hub 21 is sleeved on the outside of the dust ring 123 , and the hub 21 is clearance-fitted with the surrounding wall portion 122 .

[0038] See also Figures 1 to 2 The motor assembly 30 includes a rotating shaft 31, a rotor 32 and a stator 33. One end of the rotating shaft 31 is fixedly connected to the wheel hub 21, and the other end of the rotating shaft 31 extends into the fixing groove 131. The rotor 32 is fixedly installed in the wheel hub 21, and the stator 33 is sleeved on the outside of the fixing sleeve 13. The rotor 32 is wound around the outside of the stator 33.

[0039] See also Figure 1 、 Figure 2 and Figure 4 The motor assembly 30 also includes a bearing 34. The fixed sleeve 13 is provided with an upper bearing mounting groove 132 and a lower bearing mounting groove 133. The upper bearing mounting groove 132 and the lower bearing mounting groove 133 are both connected to the fixed groove 131. The fixed sleeve 13 is provided with an upper opening and a lower opening. The upper bearing mounting groove 132 is connected to the upper opening, and the lower bearing mounting groove 133 is connected to the lower opening. There are two bearings 34, one of which is installed in the upper bearing mounting groove 132 from the upper opening, and the other bearing 34 is installed in the lower bearing mounting groove 133 from the lower opening 35. The two bearings 34 are both sleeved on the outside of the rotating shaft 31.

[0040] See also Figure 1 、 Figure 2 and Figure 4 The dustproof heat dissipation fan 100 further includes a retaining spring 40 . A retaining groove is provided at the end of the rotating shaft 31 away from the hub 21 , and the retaining spring 40 is mounted in the retaining groove.

[0041] See also Figure 1 、 Figure 2 and Figure 4 The dustproof heat dissipation fan 100 further includes a sealing cover 50, which is disposed over the lower opening. The sealing cover 50 includes a sealing portion 51 and a sleeve portion 52 connected to the sealing portion 51. The sleeve portion 52 is axially defined with an insertion slot 521, into which the rotating shaft 31 extends. The sealing portion 51 is provided with a snap ring 511, and the main body 121 is provided with an embedding slot 126 and a snap groove 127. The snap groove 127 is disposed within the embedding slot 126. The sealing portion 51 is embedded within the embedding slot 126, and the snap ring 511 is snapped into the snap groove 127.

[0042] The installation process of the dust-proof heat dissipation fan 100 in this embodiment is as follows: during installation, the rotor 32 is fixed to the inner wall of the hub 21 by gluing, the stator 33 fixing sleeve 13 is installed outside the fixing sleeve 13, one of the bearings 34 is installed into the upper bearing mounting groove 132 from the upper opening, the end of the rotating shaft 31 away from the hub 21 passes through the bearing 34 and extends into the fixing groove 131, the other bearing 34 is installed into the lower bearing mounting groove 133 from the lower opening, and the bearing 34 is sleeved on the outside of the rotating shaft 31, the retaining ring 40 is locked in the retaining groove on the rotating shaft 31, the bearing 34 and the retaining ring 40 are abutted, and finally the sealing cover 50 is used to cover the lower opening.

[0043] Working principle: Due to the clearance fit between the wheel hub 21 and the surrounding wall portion 122, the probability of dust entering the interior of the wheel hub 21 can be effectively reduced, and the wheel hub 21 is sleeved on the outside of the dust ring 123, and a dust groove 124 is provided between the surrounding wall portion 122 and the dust ring 123. Some of the dust entering the wheel hub 21 through the gap will also be blocked by the dust ring 123 and eventually fall into the dust groove 124, sealing the lower opening of the fixing sleeve 13. This can effectively prevent dust from entering the interior of the dust-proof cooling fan 100, causing the fan to run poorly, get stuck, or have a low speed, thereby effectively extending the service life of the dust-proof cooling fan 100.

[0044] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A dust-proof heat dissipation fan, characterized in that: include: A fan housing, the fan housing comprising an outer frame and a mounting seat connected to the outer frame, the mounting seat comprising a main body and a surrounding wall portion connected to the main body, the main body being provided with a dust ring, a dust groove being provided between the surrounding wall portion and the dust ring, the main body being axially provided with a fixing sleeve, the fixing sleeve being disposed within the dust ring; An impeller connected to the fan housing; the impeller includes a hub and blades connected to the hub, the hub is sleeved outside the dust ring, and the hub is loosely fitted with the surrounding wall; as well as The motor assembly includes a rotating shaft, one end of which is fixedly connected to the wheel hub, and the other end of which extends into the fixing sleeve.

2. The dust-proof heat dissipation fan according to claim 1, characterized in that: The height of the dustproof ring is greater than the height of the surrounding wall.

3. The dust-proof heat dissipation fan according to claim 1, characterized in that: Dust removal paper is placed in the dustproof groove.

4. The dust-proof heat dissipation fan according to claim 1, characterized in that: The motor assembly further includes a rotor and a stator. The rotor is fixedly mounted in the wheel hub, the stator is sleeved outside the fixed sleeve, and the rotor is wound around the stator.

5. The dust-proof heat dissipation fan according to claim 4, characterized in that: The main body is provided with a lower opening, the fixing sleeve is axially provided with a fixing groove, the fixing groove is communicated with the lower opening, and the end of the rotating shaft away from the hub extends into the fixing groove.

6. The dust-proof heat dissipation fan according to claim 4, characterized in that: It also includes a retaining ring. A retaining groove is provided at the end of the rotating shaft away from the hub, and the retaining ring is mounted in the retaining groove.

7. The dust-proof heat dissipation fan according to claim 5, characterized in that: It also includes a sealing cover, which is arranged on the lower opening. The sealing cover includes a sealing portion and a sleeve portion connected to the sealing portion. The sleeve portion is axially provided with an inserting groove, and the rotating shaft extends into the inserting groove.

8. The dust-proof heat dissipation fan according to claim 7, characterized in that: The cover portion is provided with a snap ring, the main body portion is provided with an embedding groove and a snap groove, the snap groove is provided in the embedding groove, the cover portion is embedded in the embedding groove, and the snap ring is snapped into the snap groove.

9. The dust-proof heat dissipation fan according to claim 1, characterized in that: The outer frame is integrally connected with an extension plate, and the extension plate is provided with a clamping block for fixing to the radiator.

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