Dustproof fan

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a dustproof fan which comprises an impeller, a support, a supporting shaft, a bearing, a coil and a magnetic ring. The top side of the support extends upwards to form a center pipe, the bearing is arranged in the center pipe, and the center pipe is sleeved with the coil. One end of the supporting shaft is connected with the bearing; the impeller comprises a fan blade shell and a plurality of blades arranged along the outer side of the fan blade shell; the fan blade shell is provided with a barrel extending downwards, a mounting cavity is formed in the barrel, the magnetic ring is arranged in the mounting cavity, the support is further provided with a first dustproof ring extending upwards, the first dustproof ring and the bottom end of the barrel are covered in a staggered mode, first ribs are arranged on the side wall of the barrel, and when the impeller rotates, the first ribs form downward airflow. And the barrel body can effectively prevent dust from entering the barrel body. When the impeller rotates, downward airflow is formed by the first ribs, dust entering the barrel can be blown out, and the dust is prevented from being left in the mounting cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a dustproof fan. Background Art

[0002] As a heat dissipation element, fans are widely used in heat dissipation between electronic components. Fans are bearing structures, and the rotating shaft drives the impeller to rotate to generate wind. During the operation of the fan, dust or impurities in the air will enter the fan with the wind flow and be adsorbed on the connection between the bearing and the shaft. The adsorption amount will gradually increase as the fan runs, which will corrode and rust the bearing, causing the fan to jam, increase noise, and shorten its service life.

[0003] For example, the Chinese patent document with publication number CN208702760U discloses a fan that is easy to disassemble and assemble, including a chassis, a plate clamp, an arc-shaped support, a rear cover, a front cover, a rear cover, a switch, a motor and fan blades. A detachable plate clamp is arranged above the chassis, an arc-shaped support that can be rotated laterally is arranged above the plate clamp, a rear cover that can be flipped longitudinally is arranged on the inner side of the arc-shaped support, a front cover is arranged on the front side of the rear cover, a rear cover is arranged on the rear side of the rear cover, and a switch is embedded in the rear cover; a motor is fixed at the inner center of the rear cover, and fan blades are fixed on the rotating shaft of the motor; two symmetrically distributed rectangular holes are opened at the front end of the lower side of the plate clamp. shaped hole, a notch is provided in the middle of the lower rear end of the plate clamp, and correspondingly, a card hole is provided in the middle of the upper part of the chassis, and a supporting edge is formed inwardly at the lower opening of the card hole; two symmetrically distributed notches are provided on the outer side of the front end of the card hole, and two symmetrically distributed card blocks are formed outwardly on the inner wall of the front end of the card hole; the two card blocks are respectively located directly above the two notches; a groove is provided on the inner wall of the rear end of the card hole, a convex block is formed upwardly on the outer side of the rear end of the card hole, and a card is formed downwardly at the inner end of the convex block, the card is located in the groove, a baffle is formed outwardly on the inner side of the card, and two symmetrically distributed reinforcing ribs are formed between the upper side of the baffle and the inner side of the card.

[0004] In the technical solution of the above patent document, when the fan is running, dust and impurities will flow to the rear cover, fan blades, motor and front cover along with the wind flow. When the card block of the rear cover is opened and detached from the slot, the front cover can be quickly disassembled for easy cleaning, but this cleaning can generally only clean the dust and impurities adsorbed on the fan blades. The dust in the motor is difficult to clean and will slowly corrode the motor, causing problems such as fan jamming, increased noise and shortened life. Utility Model Content

[0005] The utility model aims to provide a dustproof fan to solve the problem that the existing fan has no dustproof mechanism, which causes dust or impurities to easily enter the fan with the airflow and be adsorbed on the bearings, causing them to rust and corrode, resulting in fan jamming, increased noise and shortened service life.

[0006] To achieve the above-mentioned purpose, an embodiment of the utility model provides a dust-proof fan, including an impeller, a bracket, a support shaft, a bearing, a coil and a magnetic ring; a center tube extends upward from the top side of the bracket, the bearing is arranged in the center tube, and the coil is sleeved on the outside of the center tube; one end of the support shaft is connected to the bearing, and the other end supports the impeller; the impeller includes a blade shell and a plurality of blades arranged along the outside of the blade shell; the blade shell is provided with a downwardly extending cylinder, an installation cavity is provided in the cylinder, and the magnetic ring is provided in the installation cavity, and the bracket is also provided with a first dustproof ring extending upward, the first dustproof ring is staggered and covered with the bottom end of the cylinder, and the side wall of the cylinder is provided with a first rib, and when the impeller rotates, the first rib forms a downward airflow.

[0007] Furthermore, the first rib is inclined in a direction opposite to the blade.

[0008] Furthermore, the cylinder includes an inner ring and an outer ring, the inner ring and the outer ring form a dustproof ring groove, and the upper end of the first dustproof ring extends into the dustproof ring groove.

[0009] Furthermore, the first rib is arranged in the dustproof ring groove.

[0010] Furthermore, a second dustproof ring is extended upward from the top side of the coil, a third dustproof ring is extended downward from the top side of the fan blade shell, and the bottom end of the third dustproof ring extends into the second dustproof ring.

[0011] Furthermore, a plurality of second ribs are provided on the inner top side of the fan blade shell, and the second ribs are distributed around the third dust ring; when the impeller rotates, the second ribs form a downward airflow.

[0012] Furthermore, the second rib is in a spiral plate structure.

[0013] Furthermore, a dust cover is extended from the inner side of the second dust ring, and the dust cover extends to the top side of the bearing.

[0014] Furthermore, the inner side of the dust cover is inclined downward and extends to the top of the inner ring of the bearing.

[0015] Furthermore, a cover plate is provided at the bottom of the bracket, and the cover plate covers the inner hole of the central tube.

[0016] The above one or more technical solutions in the dustproof fan provided by the embodiment of the utility model have at least the following technical effects:

[0017] The fan blade housing is provided with a cylinder extending downward, and the bracket is provided with a first dustproof ring extending upward. The first dustproof ring and the bottom of the cylinder are staggered and covered, so that dust can be effectively blocked from entering the cylinder. Because the side wall of the cylinder is provided with a first rib, when the impeller rotates, the first rib forms a downward airflow, which can blow out the dust entering the cylinder and prevent dust from being left in the installation cavity. This prevents dust from contacting the bearing to cause rust and corrosion, thereby causing the fan to increase noise and jam or even get stuck. This effectively reduces fan noise and increases the service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 An exploded view of the dustproof fan provided in an embodiment of the utility model.

[0020] Figure 2 A cross-sectional view of a dustproof fan provided in an embodiment of the utility model.

[0021] Figure 3 A structural diagram of an impeller of a dustproof fan provided in an embodiment of the utility model.

[0022] Figure 4 This is a structural diagram of the other side of the impeller of the dustproof fan provided in an embodiment of the utility model.

[0023] Figure 5 A structural diagram of a coil of a dustproof fan provided in an embodiment of the utility model.

[0024] Figure 6 A structural diagram of a dustproof fan bracket provided in an embodiment of the utility model.

[0025] In the figure, 100, impeller, 110, blade shell, 111, third dust ring, 112, second rib, 120, blade, 130, cylinder, 131, mounting cavity, 132, first rib, 133, inner ring, 134, outer ring, 135, dust ring groove;

[0026] 200, bracket, 210, center tube, 220, first dust ring, 230, cover plate;

[0027] 300, support shaft;

[0028] 400, bearings;

[0029] 500, coil, 510, second dustproof ring, 511, dustproof cover; 600, magnetic ring. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0034] In one embodiment of the dustproof fan of the utility model, please refer to Figure 1 to Figure 6The dustproof fan includes an impeller 100, a bracket 200, a support shaft 300, a bearing 400, a coil 500 and a magnetic ring 600. A center tube 210 extends upward from the top side of the bracket 200, the bearing 400 is arranged in the center tube 210, and the coil 500 is sleeved on the outer side of the center tube 210. One end of the support shaft 300 is connected to the bearing 400, and the other end supports the impeller 100. The impeller 100 includes a blade shell 110 and a plurality of blades 120 arranged along the outer side of the blade shell 110; the blade shell 110 is provided with a downwardly extending cylinder 130, and a mounting cavity 131 is arranged in the cylinder 130, and the magnetic ring 600 is arranged in the mounting cavity 131. The bracket 200 is also provided with a first dustproof ring 220 extending upward, and the first dustproof ring 220 is staggered with the bottom end of the cylinder 130, and the side wall of the cylinder 130 is provided with a first rib 132. When the impeller 100 rotates, the first rib 132 forms a downward airflow. Specifically, the blade shell 110 is provided with a downwardly extending cylinder 130, and the bracket 200 is provided with a first dustproof ring 220 extending upward, and the first dustproof ring 220 is staggered with the bottom end of the cylinder 130, so that dust can be effectively blocked from entering the cylinder 130. Because the first ribs 132 are provided on the side wall of the cylinder 130, when the impeller 100 rotates, the first ribs 132 form a downward airflow, which can blow out the dust entering the cylinder 130 and prevent the dust from being left in the installation cavity 131. This prevents the dust from contacting the bearing 400 and causing it to rust and corrode, thereby preventing the fan from increasing noise, jamming or even jamming. This effectively reduces the fan noise and increases the service life of the fan.

[0035] For further information, please refer to Figure 2 and Figure 4 The first rib 132 is tilted in the opposite direction to the blade 120. Specifically, when the impeller 100 rotates, the blade 120 is driven to rotate to form an upward airflow, because the first rib 132 is arranged on the side wall of the impeller cylinder 130, and the rotation direction is consistent with the impeller 100. However, the first rib 132 is tilted in the opposite direction to the blade, so that the first rib 132 forms a downward airflow to blow the dust out of the cylinder 130.

[0036] For further information, please refer to Figure 2 and Figure 4The cylinder 130 includes an inner ring 133 and an outer ring 134. The inner ring 133 and the outer ring 134 form a dustproof ring groove 135. The upper end of the first dustproof ring 220 extends into the dustproof ring groove 135. Specifically, the bearing 400, the coil 500, the magnetic ring 600 and other parts are arranged in the inner ring 133. The upper end of the first dustproof ring 220 extends into the dustproof ring groove 135. The inner ring 133 and the outer ring 134 form a two-level dustproof with the first dustproof ring 220. Even if dust enters the dustproof ring groove 135 from the outer ring 134, the inner ring 133 will further prevent the dust from continuing to enter the installation cavity 131 to avoid affecting the normal operation of the bearing 400.

[0037] Further, refer to Figure 2 and Figure 4 , the first rib 132 is arranged in the dustproof ring groove 135. Specifically, the first rib 132 is arranged in the dustproof ring groove 135, directly forming a downward airflow in the dustproof ring groove 135 to block the entry of dust.

[0038] Further, refer to Figure 2 and Figure 5 , a second dustproof ring 510 is further extended upward from the top side of the coil 500, a third dustproof ring 111 is extended downward from the top side of the blade housing 110, and the bottom end of the third dustproof ring 111 extends into the second dustproof ring 510. Specifically, the second dustproof ring 510 and the third dustproof ring 111 are arranged in the installation cavity 131 and outside the center tube 210. Since the bottom end of the third dustproof ring 111 extends into the second dustproof ring 510, dust in the installation cavity 131 can be blocked from entering the center tube 210, thereby preventing dust from contacting the bearing 400.

[0039] For further information, please refer to Figure 2 and Figure 4 , a plurality of second ribs 112 are also provided on the inner top side of the fan blade housing 110, and the second ribs 112 are distributed around the third dust ring 111; when the impeller 100 rotates, the second ribs 132 form a downward airflow. Specifically, because the second ribs 112 are distributed around the third dust ring 111, the second ribs 112 are located outside the center tube 210. When the impeller 100 rotates, the second ribs 132 form a downward airflow, which can blow the dust in the installation cavity 131 to the bottom end of the bracket 200, and then blow it out from the first dust ring 220 of the bracket to prevent the dust from staying in the installation cavity 131.

[0040] Furthermore, the second ribs 132 are in a spiral plate structure. Specifically, when the impeller 100 rotates to form an upward airflow, the second ribs 132 in a spiral plate structure will form an opposite airflow.

[0041] For further information, please refer to Figure 2 and Figure 5A dust cover 511 is further extended from the inner side of the second dust ring 510, and the dust cover 511 extends to the top side of the bearing 400. Specifically, the dust cover 511 can prevent dust from falling into the center tube 210 and contacting the bearing 400.

[0042] Further, refer to Figure 2 The inner side of the dust cover 511 extends downwardly and tilted to the top of the inner ring of the bearing 400. Specifically, the possibility of dust entering the interior of the bearing 400 is further blocked.

[0043] Further, refer to Figure 2 A cover plate 230 is also provided at the bottom of the bracket 200, and the cover plate 230 covers the inner hole of the central tube 210. Specifically, the cover plate 230 can prevent dust from passing through the inner hole of the central tube 210 and entering the bearing 400.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust-proof fan, characterized in that: It includes an impeller, a bracket, a support shaft, a bearing, a coil and a magnetic ring; a center tube extends upward from the top side of the bracket, the bearing is arranged in the center tube, and the coil is sleeved on the outside of the center tube; one end of the support shaft is connected to the bearing, and the other end supports the impeller; the impeller includes a blade shell and a plurality of blades arranged along the outside of the blade shell; the blade shell is provided with a downwardly extending cylinder, an installation cavity is provided in the cylinder, and the magnetic ring is arranged in the installation cavity, and the bracket is also provided with a first dust ring extending upward, the first dust ring is staggered with the bottom end of the cylinder, and the side wall of the cylinder is provided with a first rib, and when the impeller rotates, the first rib forms a downward airflow.

2. The dust-proof fan according to claim 1, characterized in that: The first rib is inclined in a direction opposite to the blade.

3. The dust-proof fan according to claim 2, characterized in that: The cylinder includes an inner ring and an outer ring, the inner ring and the outer ring form a dustproof ring groove, and the upper end of the first dustproof ring extends into the dustproof ring groove.

4. The dust-proof fan according to claim 3, characterized in that: The first rib is arranged in the dustproof ring groove.

5. The dust-proof fan according to any one of claims 1 to 4, characterized in that: A second dustproof ring is further extended upward from the top side of the coil, a third dustproof ring is extended downward from the top side of the fan shell, and the bottom end of the third dustproof ring extends into the second dustproof ring.

6. The dust-proof fan according to claim 5, characterized in that: A plurality of second ribs are also provided on the inner top side of the fan blade shell, and the second ribs are distributed around the third dustproof ring; when the impeller rotates, the second ribs form a downward airflow.

7. The dust-proof fan according to claim 6, characterized in that: The second rib is in a spiral plate structure.

8. The dust-proof fan according to claim 5, characterized in that: A dust cover is further extended from the inner side of the second dust ring, and the dust cover extends to the top side of the bearing.

9. The dust-proof fan according to claim 8, characterized in that: The inner side of the dust cover is inclined downward and extends to the top of the inner ring of the bearing.

10. The dust-proof fan according to claim 1, characterized in that: A cover plate is also provided at the bottom of the bracket, and the cover plate covers the inner hole of the central tube.

Images