Support and centrifugal fan with same

Abstract

The utility model relates to a support, when the support is arranged on a flow channel of a centrifugal fan, the extension direction of the support is the same as the rotation direction of fan blades of the centrifugal fan, the support is provided with a groove, and at least one wire passes through the groove.

Description

Technical Field

[0001] This case relates to a bracket, particularly a bracket suitable for a centrifugal fan, wherein the bracket extends in the same direction as the rotation direction of the fan blades and is used for passing wires. Background Art

[0002] Currently, fans can be mainly divided into axial flow and centrifugal types. The operation mode of a centrifugal fan is that the airflow enters from the axial direction of the fan impeller, flows along the radial direction of the impeller, converges into a high-pressure fluid through the flow channel, and then flows out from the radial air outlet. Centrifugal fans have been widely used in various electronic devices or vehicle-mounted systems to dissipate heat from the heat-generating components in the electronic devices or vehicle-mounted systems. Generally, a centrifugal fan includes a housing, an impeller, and a stator structure. The impeller is arranged in the housing and is located in the flow channel between the air inlet and the air outlet. The stator structure is arranged in the housing and is connected to the impeller to drive the impeller to rotate, so that the airflow enters the housing from the air inlet and is discharged from the air outlet. In some well-known centrifugal fans, in order to increase the durability of the fan and add waterproof performance, glue is usually poured so that the glue layer covers the bottom of the stator structure to achieve a waterproof effect.

[0003] See also Figure 1, which is a schematic structural diagram of a conventional centrifugal fan base. As shown in the figure, the base 10 of the casing (not shown) of a conventional centrifugal fan (not shown) comprises a bottom surface 100, an inner sidewall 101, and an outer sidewall 102. The bottom surface 100 and the outer sidewall 102 together define the interior space of the centrifugal fan (not shown). As shown in the figure, the outer sidewall 102 is a generally circular casing structure disposed around the bottom surface 100, and one open end thereof serves as an air outlet 107 for the centrifugal fan (not shown). In the center of the base 10 is a receiving groove 105 formed by the inner sidewall 101, for receiving a stator structure (not shown). Once the stator structure is disposed in the receiving groove 105, a glue potting process is performed, and wires (not shown) electrically connected to the stator structure are routed out through the wire outlet 101a on the inner sidewall 101. In this conventional art, a wire portion 103 is provided on the base 10 to provide a path for the wires to exit. In some embodiments, the wire portion 103 has a raised protrusion, and its top surface is flush with the position of the wire outlet 101a, allowing the wire to be routed along the wire portion 103 and placed accordingly on this top surface. As shown in the figure, one end of the wire portion 103 is connected to the wire outlet 101a on the inner sidewall 101, and the other end is connected to the wire outlet slot 104 on the outer sidewall 102. In other words, the wire portion 103 traverses the flow channel 106 defined by the inner sidewall 101, the outer sidewall 102, and the bottom surface 100. Therefore, in this conventional technology, the wire is connected to the wire outlet 101a on the inner sidewall 101 and is arranged on the wire portion 103, extending outward from the wire portion 103 toward the wire outlet slot 104 on the outer sidewall 102. As a result, since the wire is placed only on the wire portion 103, the high air volume generated when the centrifugal fan is in operation may cause the wire to deviate, making it difficult to position. In addition, since the wire portion 103 is a protruding structure that crosses the flow channel 106 , it blocks part of the wind path, thereby affecting the overall performance of the centrifugal fan and causing noise.

[0004] Therefore, the casing of the centrifugal fan in the prior art has a wire portion that crosses the flow channel, which affects and reduces the air volume and pressure, and also produces high noise, which leaves room for improvement. Utility Model Content

[0005] One objective of the present invention is to provide a bracket that, when installed on the flow path of a centrifugal fan, extends in the same direction as the direction of rotation of the centrifugal fan blades. The bracket also has a groove for allowing wires to pass through, thereby ensuring a stable and non-deflective wire outlet path. This allows the bracket to maintain wind pressure characteristics and reduce noise while improving fan efficiency.

[0006] Another object of this case is to provide a centrifugal fan having a base on which a bracket extending along the flow field is provided, through which a wire passes and is partially straddled, so that the wire outlet path is stable and does not deviate. Moreover, since the structure does not block the wind path, the wind pressure characteristics can still be maintained and noise can be reduced under the premise of waterproofing by glue filling, thereby improving fan efficiency.

[0007] To achieve the above-mentioned purpose, a preferred embodiment of the present invention is to provide a bracket. When the bracket is set on the flow channel of the centrifugal fan, the extension direction of the bracket is the same as the rotation direction of the centrifugal fan blades, and the bracket has a groove for at least one wire to pass through.

[0008] To achieve the above-mentioned object, another preferred embodiment of the present invention is to provide a bracket. When the bracket is disposed on the flow channel of the centrifugal fan, the bracket has a protruding structure, and the protruding structure is contacted by at least one wire.

[0009] To achieve the above-mentioned purpose, another preferred embodiment of the present invention is to provide a bracket. When the bracket is set on the flow path of the centrifugal fan, the extension direction of the bracket and the rotation direction of the centrifugal fan blades form an angle in the horizontal plane, and 0 degrees < the angle ≤ 90 degrees, wherein the bracket has a groove, and at least one wire passes through the groove.

[0010] According to the conception of the present invention, the groove has a first width, the bracket has a second width, and the second width is greater than the first width.

[0011] According to the concept of this case, when the bracket is disposed between the inner wall and the outer wall of the centrifugal fan, a first gap is formed between the bracket and the inner wall, and a second gap is formed between the bracket and the outer wall.

[0012] According to the conception of this case, the bracket is arranged on the fan frame of the centrifugal fan, and the bracket and the base of the fan frame are integrally formed.

[0013] According to the conception of this case, the bracket is arranged on the fan frame of the centrifugal fan, and the bracket and the fan frame are made of different materials.

[0014] To achieve the above objectives, another preferred embodiment of the present invention provides a centrifugal fan comprising an impeller, a stator structure, a base, and a cover. The impeller has multiple blades. The stator structure is used to drive the impeller and contains a conductive wire. The base is provided with a bracket having a groove for the conductive wire to pass through. The cover and base are combined to form a fan frame. The bracket extends in the same direction as the direction of rotation of the blades.

[0015] To achieve the above objectives, another preferred embodiment of the present invention provides a centrifugal fan comprising an impeller, a stator structure, a base, and a cover. The impeller has multiple blades. The stator structure is used to drive the impeller and has a wire. The base is provided with a bracket having a groove. The cover and the base are combined to form a fan frame. The extension direction of the bracket and the rotation direction of the blades form an angle on a horizontal plane, and the angle is 0 degrees < the angle ≤ 90 degrees.

[0016] To achieve the above objectives, another preferred embodiment of the present invention provides a centrifugal fan comprising an impeller, a stator structure, a base, and a cover. The impeller has multiple blades. The stator structure is used to drive the impeller and has a conductive wire. The base is provided with a bracket having a protruding structure that is contacted by the conductive wire. The cover and base are combined to form a fan frame.

[0017] According to the conception of the present invention, the groove has a first width, the bracket has a second width, and the second width is greater than the first width.

[0018] According to the conception of this case, the bracket and the base of the fan frame are integrally formed.

[0019] According to the conception of this case, the materials of the bracket and the base are different.

[0020] According to the concept of this case, the base of the fan frame has an inner wall and an outer wall, the bracket is arranged between the inner wall and the outer wall, a first gap is formed between the bracket and the side wall, and a second gap is formed between the bracket and the outer wall.

[0021] According to the conception of this case, the inner side wall surrounds the accommodating slot, and the stator structure is arranged in the accommodating slot.

[0022] According to the conception of this case, the accommodating groove is provided with a protective structure, and the protective structure covers part or all of the stator structure.

[0023] According to the conception of this case, there is a wire outlet on the inner wall and a wire outlet groove on the outer wall, and the wires pass through the wire outlet and the wire outlet groove.

[0024] According to the conception of this case, the distance between the center of the accommodating groove and the inner wall is the first radius, the distance between the center of the accommodating groove and the bracket is the second radius, and the distance between the center of the accommodating groove and the outlet groove is the third radius, wherein the size of the first gap is the second radius minus the first radius, and the size of the second gap is the third radius minus the second radius, wherein the size of the first gap is equal to the size of the second gap.

[0025] According to the conception of this case, the distance between the center of the accommodating groove and the inner wall is the first radius, the distance between the center of the accommodating groove and the bracket is the second radius, and the distance between the center of the accommodating groove and the outlet groove is the third radius, wherein the size of the first gap is the second radius minus the first radius, and the size of the second gap is the third radius minus the second radius, wherein the size of the first gap is not equal to the size of the second gap.

[0026] According to the conception of this case, the vertical height from the bottom edge of the wire outlet to the bottom surface of the base is the first height, the vertical height from the bottom edge of the groove to the bottom surface is the second height, and the vertical height from the bottom edge of the wire outlet trough to the bottom surface is the third height, wherein the first height, the second height and the third height are equal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the base of a conventional centrifugal fan.

[0028] Figure 2 This is a schematic diagram of the explosion structure of the centrifugal fan of the first preferred embodiment of this case.

[0029] Figure 3 for Figure 2 The schematic structural diagram of the base of the centrifugal fan is shown.

[0030] Figure 4 This is a top view of the bracket of the first preferred embodiment of this case.

[0031] Figure 5 for Figure 3 A partial top view of the base is shown.

[0032] Figure 6 for Figure 3 Schematic diagram of the partial structure of the base shown.

[0033] Figure 7 for Figure 5 A schematic diagram of the partial cross-sectional structure of the base is shown.

[0034] Description of Reference Numerals

[0035] 10: Base,

[0036] 100: Bottom,

[0037] 101: inner wall,

[0038] 101a: outlet,

[0039] 102: outer wall,

[0040] 103: Wire part,

[0041] 104: Wire duct,

[0042] 105: accommodating tank,

[0043] 106: runner,

[0044] 107: air outlet,

[0045] 2: Centrifugal fan,

[0046] 20: base,

[0047] 200: Bottom,

[0048] 201: outer wall,

[0049] 202: accommodating tank,

[0050] 202a: accommodating bottom surface,

[0051] 203: inner wall,

[0052] 204: outlet,

[0053] 204a: bottom edge of the outlet,

[0054] 205: Wire duct,

[0055] 205a: bottom edge of the outlet trough,

[0056] 206: runner,

[0057] 207: air outlet,

[0058] 21: Cover,

[0059] 210: air inlet,

[0060] 22: Impeller,

[0061] 221: fan blades,

[0062] 23: stator structure,

[0063] 24: Protective structure,

[0064] 25: Wire,

[0065] 26: bracket,

[0066] 260: groove,

[0067] 260a: groove bottom edge,

[0068] 261: head,

[0069] 262: tail,

[0070] 27: fan frame,

[0071] E: extension direction of the bracket,

[0072] R: fan blade rotation direction,

[0073] g1: first gap,

[0074] g2: second gap,

[0075] W1: first width,

[0076] W2: second width,

[0077] R1: first radius,

[0078] R2: second radius,

[0079] R3: third radius,

[0080] H1: first height,

[0081] H2: second height,

[0082] H3: The third height. DETAILED DESCRIPTION

[0083] Some typical embodiments that embody the features and advantages of this invention will be described in detail in the following description. It should be understood that this invention can be modified in various ways without departing from the scope of this invention, and the description and drawings are intended to be illustrative in nature and not to limit this invention.

[0084] See also Figure 2 , which is a schematic diagram of the exploded structure of the centrifugal fan of the first preferred embodiment of this case. As shown in the figure, the centrifugal fan 2 of this case includes a base 20, a cover 21, an impeller 22, a stator structure 23 and other structures. Among them, the impeller 22 has a plurality of blades 221. The stator structure 23 is used to drive the impeller 22 to rotate and has a wire 25. The base 20 and the cover 21 are combined to form a fan frame 27. The base 20 has a flow channel 206, in which a bracket 26 is provided, and the extending direction of the bracket 26 is in the same direction as the rotation direction R of the blades 22. When the centrifugal fan 2 is running, the rotation of the impeller 22 drives the air flow to enter from the air inlet 210 on the cover 21, flow in the flow channel 206 between the base 20 and the cover 21, and then flow out from the air outlet 207 defined by the base 20 and the cover 21. In this embodiment, the stator structure 23 is electrically connected to at least one wire 25 , and the at least one wire 25 passes through and partially spans the bracket 26 .

[0085] Please also see Figure 2 and Figure 3 . Figure 3 for Figure 2 The schematic diagram of the structure of the base of the centrifugal fan is shown in FIG. Figure 3As shown, the base 20 is a shell structure composed of a bottom surface 200 and an outer side wall 201 surrounding the bottom surface 200, and an air outlet 207 is provided at an open end on one side of the outer side wall 201 for air to flow out of the centrifugal fan 2. In this embodiment, the center of the base 20 also has a receiving groove 202, and the receiving groove 202 is defined by the receiving bottom surface 202a and the inner side wall 203 surrounding the receiving bottom surface 202a. In this embodiment, the receiving groove 202 is mainly for the stator structure 23 and the protective structure 24 to be correspondingly arranged therein. After the stator structure 23 is arranged in the receiving groove 202 of the base 20, glue will be poured to achieve a waterproof effect. In this embodiment, part or all of the stator structure 23 is covered by the protective structure 24 to achieve a protective effect. For example Figure 2 As shown, the wire 25 is mounted on the bracket 26 along the outlet 204 on the inner sidewall 203, extending outward from the outlet slot 205 on the outer sidewall 201. In this embodiment, the bracket 26 is disposed on the bottom surface 200 of the centrifugal fan 2, corresponding to the outlet 204 on the inner sidewall 203 and the outlet slot 205 on the outer sidewall 201, to assist in supporting at least one wire 25. As shown, the bracket 26 is disposed within the flow channel 206 defined by the bottom surface 200, the inner sidewall 203, and the outer sidewall 201. However, the extension direction of the bracket 26 at both ends is aligned with the direction of rotation R of the centrifugal fan 2 blades. In other words, the bracket 26 does not cross the flow channel 206, nor does it intersect the windshield. The bracket 26 can also be assembled with the base 20, thereby improving fan performance. Even when the bracket 26 and the base 20 are integrally formed, fan performance can be further improved. In other embodiments, when the materials of the bracket 26 and the base 20 are different, the fan performance can be further improved.

[0086] See also Figure 4 . Figure 4This is a top view of the bracket of the first preferred embodiment of this case. As shown in the figure, in this embodiment, the bracket 26 includes a head 261 and a tail 262, and has a groove 260. The groove 260 is disposed between the head 261 and the tail 262, but is not limited to this. In some embodiments, the bracket 26 may be, but is not limited to, a half-moon-shaped structure, with the head 261 and the tail 262 having smooth chamfers, and the extension direction of the bracket 26 is in the same direction as the blade rotation direction R of the centrifugal fan 2, thereby improving fan efficiency and reducing noise. However, in other embodiments, the bracket 26 may also have a structure with sharp ends, and its extension direction is also in the same direction as the blade rotation direction R, thereby further improving fan efficiency and reducing noise. In other embodiments, the bracket 26 may also have a protruding structure, for example, replacing the groove 260 with a protruding structure, and contacting the wire 25. Therefore, its appearance can be arbitrarily varied according to the actual implementation situation and is not limited to these embodiments. Specifically, when the bracket 26 has a protruding structure, the wire 25 can be in contact with the side or top of the protruding structure to achieve the effects of improving fan efficiency and reducing noise.

[0087] In some embodiments, the extension direction E of the bracket 26 and the fan blade rotation direction R form an angle Θ in the horizontal plane, and 0 degrees < Θ ≤ 90 degrees, to achieve the effect of improving fan efficiency and reducing noise. Furthermore, in this embodiment, the groove 260 has a first width W1, the bracket 26 has a second width W2, and the second width W2 of the bracket 26 is 12.8 mm, and the first width W1 of the groove 260 is 6.6 mm, to accommodate three wires 25. However, the width is not limited to this example and the width of the groove 260 can also be adjusted accordingly based on the actual number of wires 25. In this embodiment, the second width W2 of the bracket 26 is preferably greater than the first width W1 of the groove 260 to further improve fan efficiency and reduce noise. However, the widths of the bracket 26 and the groove 260 can be arbitrarily varied according to their location and the corresponding number of wires 25, and are not limited to this.

[0088] See also Figure 5 . Figure 5 for Figure 3A partial top view of the base is shown. In this embodiment, the bracket 26 is disposed on the bottom surface 200 of the base 20 of the centrifugal fan 2 and is disposed in the flow channel 206 between the outlet port 204 on the inner wall 203 and the outlet slot 205 on the outer wall 201, thereby improving fan efficiency and reducing noise. In this embodiment, the distance from the center 202b of the accommodating groove 202 to the inner wall 203 can be defined as a first radius R1, which can be, but is not limited to, 32 mm, for example. The distance from the center 202b of the accommodating groove 202 to the bracket 26 can be defined as a second radius R2, which can be, but is not limited to, 38 mm. Furthermore, the distance from the center 202b of the accommodating groove 202 to the outlet slot 205 can be defined as a third radius R3, which can be, but is not limited to, 44 mm. The inner sidewall 203 surrounds the inner sidewall 203, allowing the space within the first radius R1 of the accommodating groove 202 to serve as a glue-filling space. The inner sidewall 203 also blocks the glue from leaking out. As shown in the figure, a first gap g1 is defined between the bracket 26 and the outlet 204 on the inner sidewall 203, and a second gap g2 is defined between the bracket 26 and the outlet groove 205 on the outer sidewall 201. Therefore, in this embodiment, the size of the first gap g1 is the second radius R2 minus the first radius R1, which is 6 mm. The size of the second gap g2 is the third radius R3 minus the second radius R2, which is also 6 mm. In this embodiment, the sizes of the first gap g1 and the second gap g2 are both greater than 0, and the size of the first gap g1 is equal to the size of the second gap g2, but this is not limiting. Thus, the bracket 26 of this case is not directly connected to the outlet 204 and the outlet groove 205. The first gap g1 and the second gap g2 are defined between the bracket 26 and the outlet 204 and the outlet groove 205, respectively. In this embodiment, the first gap g1 is equal to the second gap g2, meaning the bracket 26 is positioned in the center of the flow channel 206. However, this is not a limitation. This effectively divides the airflow in the flow channel 206 into equal parts. This maintains the airflow characteristics without reducing the airflow velocity, while also reducing noise. In other embodiments, the size of the first gap g1 is not equal to the size of the second gap g2. This means the bracket 26 can be positioned slightly to the left or slightly to the right of the flow channel 206. This is not a limitation and can be varied based on practical needs. Furthermore, in other embodiments, the centrifugal fan 2 can have two or three brackets 26, dispersed between the wire outlet 204 on the inner wall 203 and the wire outlet slot 205 on the outer wall 201. These brackets 26 assist in supporting the wires 25, increasing wiring stability and reducing the risk of wire damage. This can even improve fan performance and reduce noise. The number and placement of the brackets 26 can be varied based on practical needs and is not a limitation.

[0089] Please also see Figure 5 、 Figure 6 and Figure 7 . Figure 6for Figure 3 Schematic diagram of the partial structure of the base shown. Figure 7 for Figure 5 A partial cross-sectional structural diagram of the base is shown. As shown, the bracket 26 of this embodiment is correspondingly disposed between the wire outlet 204 on the inner sidewall 203 and the wire outlet slot 205 on the outer sidewall 201, and the groove 260 of the bracket 26 is disposed corresponding to the wire outlet 204 and the wire outlet slot 205. In other words, the wire outlet 204, the groove 260, and the wire outlet slot 205 are correspondingly disposed in a straight line extending radially from the center 202b of the accommodating tank 202 toward the outer sidewall 201, thereby achieving the effects of improving fan efficiency and reducing noise. In this embodiment, the first width W1 of the groove 260 is the same as the width W1 of the wire outlet 204 and the width of the wire outlet slot 205, but this is not a limitation. It can be seen that the position and width of the groove 260 of this embodiment are the same as those of the outlet 204 and the outlet groove 205, so that the wire 25 can pass outward from the outlet 204 on the inner wall 203, and cross the groove 260 on the bracket 26, and then extend outward toward the outlet groove 205 on the outer wall 201. In other words, the wire 25 passes through the outlet 204, the groove 260 and the outlet groove 205. Figure 7 As shown, the vertical height from the bottom edge 204a of the outlet 204 on the inner wall 203 to the bottom surface 200 of the base 20 is a first height H1, the vertical height from the bottom edge 260a of the groove 260 to the bottom surface 200 of the base 20 is a second height H2, and the vertical height from the bottom edge 205a of the outlet trough 205 on the outer wall 201 to the bottom surface 200 of the base 20 is a third height H3. In this embodiment, the first height H1, the second height H2, and the third height H3 are all the same, namely 4.2 mm, but this is not limiting. This uniform height ensures that the wires 25 are flush with each other as they pass through the bottom edge 204a of the outlet 204, straddle the bottom edge 260a of the groove 260, and then rest on the bottom edge 205a of the outlet trough 205. This allows the wires 25 to be positioned smoothly without bending, thereby increasing the product's service life.

[0090] In summary, this invention provides a bracket suitable for a centrifugal fan, which includes an impeller, a stator structure, a base, and a cover. The bracket is positioned within the flow channel of the base via a bracket, extending in the same direction as the centrifugal fan's blades. The bracket also includes a groove for at least one wire to pass through and partially span, thereby ensuring a stable and stable wire outlet path and achieving effective wire positioning and bundling. Furthermore, because the bracket's structure and extension direction do not obstruct the wind path, wind pressure characteristics can be maintained while ensuring waterproofing through glue injection, thereby reducing noise and improving fan efficiency.

[0091] The present invention can be modified in various ways by ordinary technicians in this field, but it will not deviate from the scope of protection of the attached patent application.

Claims

1. A bracket, characterized in that: When the bracket is arranged on a flow channel of a centrifugal fan, the extension direction of the bracket is the same as the rotation direction of the blades of the centrifugal fan, and the bracket has a groove for at least one wire to pass through.

2. The bracket according to claim 1, wherein: The groove has a first width, the bracket has a second width, and the second width is greater than the first width.

3. A bracket, characterized in that: When the bracket is arranged on a flow channel of a centrifugal fan, the bracket has a protruding structure, and the protruding structure is contacted by at least one wire.

4. A bracket, characterized in that: When the bracket is set on a flow channel of a centrifugal fan, the extension direction of the bracket and the rotation direction of the centrifugal fan blades form an angle on a horizontal plane, and 0 degrees < the angle ≤ 90 degrees, wherein the bracket has a groove for at least one wire to pass through.

5. The bracket according to claim 4, characterized in that The groove has a first width, the bracket has a second width, and the second width is greater than the first width.

6. The bracket according to any one of claims 1, 3 and 4, characterized in that: When the bracket is disposed between an inner side wall and an outer side wall of the centrifugal fan, a first gap is formed between the bracket and the inner side wall, and a second gap is formed between the bracket and the outer side wall.

7. The bracket according to any one of claims 1, 3 and 4, characterized in that: The bracket is arranged on a fan frame of the centrifugal fan, and the bracket is integrally formed with a base of the fan frame.

8. The bracket according to any one of claims 1, 3 and 4, characterized in that: The bracket is arranged on a fan frame of the centrifugal fan, and the bracket and the fan frame are made of different materials.

9. A centrifugal fan, characterized in that: include: an impeller having a plurality of blades; a stator structure for driving the impeller to rotate, the stator structure having a conducting wire; A base is provided with a bracket, the bracket has a groove, and the wire passes through the groove; as well as a cover body, combined with the base to form a fan frame; The extension direction of the bracket is the same as the rotation direction of the fan blades.

10. A centrifugal fan, characterized in that: include: an impeller having a plurality of blades; a stator structure for driving the impeller to rotate, the stator structure having a conducting wire; A base having a bracket with a groove; and a cover body, combined with the base to form a fan frame; The extending direction of the bracket and the rotating directions of the fan blades form an angle on a horizontal plane, and 0 degrees < the angle ≤ 90 degrees.

11. The centrifugal fan according to claim 9 or 10, characterized in that: The groove has a first width, the bracket has a second width, and the second width is greater than the first width.

12. The centrifugal fan according to claim 9 or 10, characterized in that: The fan frame has an inner wall and an outer wall, the bracket is arranged between the inner wall and the outer wall, a first gap is sandwiched between the bracket and the inner wall, and a second gap is sandwiched between the bracket and the outer wall, the inner wall has a wire outlet, the outer wall has a wire outlet groove, the wire passes through the wire outlet and the wire outlet groove, the vertical height from the bottom edge of the wire outlet to a bottom surface of the base is a first height, the vertical height from the bottom edge of the groove to the bottom surface is a second height, and the vertical height from the bottom edge of the wire outlet groove to the bottom surface is a third height, wherein the first height, the second height and the third height are equal.

13. A centrifugal fan, characterized in that: include: an impeller having a plurality of blades; a stator structure for driving the impeller to rotate, the stator structure having a conducting wire; A base is provided with a bracket, the bracket has a protruding structure, and the protruding structure is contacted by the wire; as well as A cover body is combined with the base to form a fan frame.

14. The centrifugal fan according to any one of claims 9, 10 and 13, characterized in that: The bracket is integrally formed with the base of the fan frame.

15. The centrifugal fan according to any one of claims 9, 10 and 13, characterized in that: The bracket and the base are made of different materials.

16. The centrifugal fan according to any one of claims 9, 10 and 13, characterized in that: The fan frame has an inner wall and an outer wall. The bracket is arranged between the inner wall and the outer wall. A first gap is formed between the bracket and the inner wall, and a second gap is formed between the bracket and the outer wall.

17. The centrifugal fan according to claim 16, wherein: The inner side wall surrounds a receiving groove, and the stator structure is arranged in the receiving groove.

18. The centrifugal fan according to claim 17, wherein: The accommodating groove is provided with a protection structure, and the protection structure covers part or all of the stator structure.

19. The centrifugal fan according to claim 16, wherein: The inner side wall is provided with a wire outlet, the outer side wall is provided with a wire outlet groove, and the wire passes through the wire outlet and the wire outlet groove.

20. The centrifugal fan according to claim 19, wherein The inner sidewall surrounds a receiving groove, and the stator structure is arranged in the receiving groove. The distance between the center of the receiving groove and the inner sidewall is a first radius, the distance between the center of the receiving groove and the bracket is a second radius, and the distance between the center of the receiving groove and the outlet groove is a third radius, wherein the size of the first gap is the second radius minus the first radius, and the size of the second gap is the third radius minus the second radius, wherein the size of the first gap is equal to the size of the second gap.

21. The centrifugal fan according to claim 19, wherein The inner sidewall surrounds a receiving groove, and the stator structure is arranged in the receiving groove. The distance between the center of the receiving groove and the inner sidewall is a first radius, the distance between the center of the receiving groove and the bracket is a second radius, and the distance between the center of the receiving groove and the outlet groove is a third radius, wherein the size of the first gap is the second radius minus the first radius, and the size of the second gap is the third radius minus the second radius, wherein the size of the first gap is not equal to the size of the second gap.

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