Heat dissipation fan and vehicle

Abstract

This invention provides a cooling fan and a vehicle. The cooling fan includes an impeller, a bracket, and a motor. The impeller includes a hub and blades, with one side of the blades connected to the hub. Along the axial direction of the cooling fan, the bracket is located on one side of the impeller and includes a connecting cover and ribs, with one side of the ribs connected to the connecting cover. The motor is connected to the bracket, and the motor's output shaft passes through the connecting cover and is connected to the hub. The minimum spacing L between the blades and the ribs along the axial direction of the cooling fan is specified. min Along the radial direction of the cooling fan, the distance between one side of the blade and the other side of the blade is H, L min H satisfies the following condition: 6% ≤ L min / H≤14%. When L min H satisfies 6% ≤ L min Under the condition that / H≤14%, improve aerodynamic efficiency and optimize the performance of cooling fans without worsening aerodynamic noise.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation equipment technology, and more specifically, to a cooling fan and a vehicle. Background Technology

[0002] The cooling fan of a vehicle is mainly used in the vehicle's cooling system to dissipate heat. The cooling fan consists of an impeller and a bracket. The impeller rotates and does work on the airflow. The airflow is drawn in and passes axially through the impeller and the bracket.

[0003] After the airflow passes through the impeller, the impeller's work causes some of the airflow to flow circumferentially. The circumferentially flowing airflow further decreases in speed as it passes through the support, thus generating static pressure recovery. However, increasing the static pressure recovery effect will increase aerodynamic noise. Therefore, it is necessary to consider optimizing the parameters inside the cooling fan to balance aerodynamic performance and aerodynamic noise. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] In view of the above, in a first aspect, the present invention provides a cooling fan, comprising: an impeller, the impeller including a hub and blades, one side of the blades being connected to the hub; a bracket, along the axial direction of the cooling fan, the bracket being located on one side of the impeller, the bracket including a connecting cover and ribs, one side of the ribs being connected to the connecting cover; and a motor, connected to the bracket, the output shaft of the motor passing through the connecting cover and connected to the hub; wherein, along the axial direction of the cooling fan, the minimum spacing L between the blades and the ribs is... min Along the radial direction of the cooling fan, the distance between one side of the blade and the other side of the blade is H, L min H satisfies the following condition: 6% ≤ L min / H≤14%.

[0006] When L min H satisfies 6% ≤ L min Under the condition that / H≤14%, aerodynamic efficiency is improved and the performance of the cooling fan is optimized without worsening aerodynamic noise. Moreover, within the above range, the axial dimension of the cooling fan is smaller, reducing the space occupied by the cooling fan in the axial direction. This allows the cooling fan to be installed in the compact space of the vehicle, and the cooling fan is less likely to interfere with other structures.

[0007] In some technical solutions, optionally, the distance between the two sides of the blade along the axial direction of the cooling fan is L1, and L1 and H satisfy the following condition: 18% ≤ L1 / H ≤ 25%.

[0008] This design combines the axial and radial dimensions of the blades, limiting L1 and H to meet the following conditions: 18% ≤ L1 / H ≤ 25%. Within this range, the axial dimension of the blades will not be too large, thereby reducing the space occupied by the cooling fan in the axial direction, while also ensuring the turbulence effect of the blades on the airflow, thus ensuring that the cooling fan can quickly draw in airflow.

[0009] In some technical solutions, optionally, the axial spacing between the two sides of the ribs along the axial direction of the cooling fan is L2, and L2 and H satisfy the following condition: 15% ≤ L2 / H ≤ 22%.

[0010] In this design, the axial dimensions of the ribs are combined with the radial dimensions of the blades, limiting L2 and H to meet the following conditions: 15% ≤ L2 / H ≤ 22%. Within this range, the ribs are less likely to obstruct airflow, and the axial dimensions of the blades will not be too large, thereby reducing the axial space occupied by the cooling fan. It also ensures that the ribs have high structural strength, prevents deformation of the ribs, and guarantees the relative positional matching between the ribs and the blades.

[0011] In some technical solutions, optionally, the spacing between the blades and ribs increases and then decreases along the axial direction of the cooling fan, from the side of the blades adjacent to the hub to the side of the blades away from the hub.

[0012] From the side of the blade adjacent to the hub to the side of the blade away from the hub, the side of the blade facing the rib has an arc-shaped structure, so that the axial distance between the blade and the rib changes continuously from the inside to the outside. In this design, the axial distance between the blade and the rib is limited to first increasing and then decreasing from the inside to the outside. Based on this, due to the difference in the axial distance between the blade and the rib, the airflow from the blade to the rib is less likely to generate large noise. Moreover, by matching the blade and the rib through the above structure, it is beneficial to improve the static pressure recovery effect of the rib on the airflow, thereby improving the performance of the cooling fan.

[0013] In some technical solutions, optionally, along the axial direction of the cooling fan, the distance between the side of the blade adjacent to the hub and the rib is the smallest, or the distance between the side of the blade away from the hub and the rib is the smallest.

[0014] The axial distance between the blade and the rib increases and then decreases from the inside to the outside. However, the axial distance between the blade and the rib is different on the side closer to the axis and the side farther from the axis. That is, the axial distance between the blade and the rib on the side closer to the axis is greater than or less than the axial distance on the side farther from the axis. Based on this, the noise generated when the airflow passes through the rib can be further reduced.

[0015] In some technical solutions, optionally, there are multiple blades and ribs, with the number of blades being greater than the number of ribs.

[0016] The number of blades is greater than the number of ribs. The relatively larger number of blades allows the cooling fan to drive a larger airflow. The relatively smaller number of ribs avoids excessive obstruction of airflow, ensuring that airflow can be smoothly drawn into the cooling fan.

[0017] In some technical solutions, optionally, the number of blades is N1 and the number of ribs is N2, and the difference between the number of N1 and N2 satisfies the following condition: 1≤N1-N2≤5.

[0018] The number of blades should be greater than the number of ribs. If the difference between the number of blades and ribs is significant, the static pressure recovery effect of the ribs on the circumferential airflow will decrease, thus affecting the airflow of the cooling fan. This design limits the difference between the number of blades and ribs to 5 or less. For example, if there are 10 blades, the number of ribs must not be less than 5. This ensures the static pressure recovery effect of the ribs on the circumferential airflow, which is beneficial for improving the performance of the cooling fan.

[0019] In some technical solutions, the cooling fan may optionally include: connecting ribs, wherein at least some of the adjacent ribs are connected by connecting ribs.

[0020] A connecting bar is provided between two adjacent ribs, and the two ends of the connecting bar are connected to the two adjacent ribs respectively. The connecting bar supports the two adjacent ribs.

[0021] With the connecting ribs supporting the ribs, the ribs are less prone to deformation, thus preventing changes in the spacing or relative position between the ribs and the blades. This ensures the matching degree between the ribs and the blades, avoids increased noise during operation of the cooling fan due to rib deformation, and guarantees the performance of the cooling fan.

[0022] In some technical solutions, optionally, the axis of the arc surface A is set to coincide with the axis of the cooling fan, and the ribs are cut from the arc surface A, with the cross-section of the ribs being triangular or airfoil-shaped.

[0023] The arc surface A can be a complete annular surface or a non-complete annular surface. The rib is cut from the arc surface A, and the cross-sectional shape of the rib is triangular or airfoil.

[0024] Secondly, the present invention provides a vehicle including the cooling fan of any of the above-mentioned technical solutions.

[0025] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 A schematic diagram of the impeller and support structure in an embodiment of the present invention is shown;

[0028] Figure 2 A schematic diagram of the cooling fan structure in an embodiment of the present invention is shown;

[0029] Figure 3 A schematic diagram of the blade and rib structure in an embodiment of the present invention is shown;

[0030] Figure 4 A schematic diagram of the impeller and support structure in an embodiment of the present invention is shown;

[0031] Figure 5 A schematic diagram of the impeller and support structure in an embodiment of the present invention is shown.

[0032] Figure label:

[0033] 100 Cooling fan, 110 Impeller, 111 Hub, 112 Blade, 113 Air guard, 120 Bracket, 121 Rib, 122 Connecting cover, 123 Air guard, 130 Motor, 140 Connecting rib, 150 Motor cable fixing rib. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0036] The following reference Figures 1 to 5 The present invention describes a cooling fan and a vehicle provided according to some embodiments thereof.

[0037] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of the present invention, a cooling fan 100 is provided, including: an impeller 110, a bracket 120, and a motor 130. The impeller 110 includes a hub 111 and blades 112, with one side of the blades 112 connected to the hub 111. Along the axial direction of the cooling fan 100 (… Figure 1(The arrow at point D points to) The bracket 120 is located on one side of the impeller 110. The bracket 120 includes a connecting cover 122 and ribs 121, with one side of the ribs 121 connected to the connecting cover 122. The motor 130 is connected to the bracket 120, and the output shaft of the motor 130 passes through the connecting cover 122 and is connected to the hub 111. The minimum distance L between the blades 112 and the ribs 121 along the axial direction of the cooling fan 100 is... min Along the radial direction of cooling fan 100 ( Figure 4 (The arrow at point R points to) the distance between one side and the other side of blade 112 is H, L. min H satisfies the following condition: 6% ≤ L min / H≤14%.

[0038] Motor 130 is mounted on bracket 120. The output shaft of motor 130 can pass through connecting cover 122. Ribs 121 are arranged circumferentially on connecting cover 122, and ribs 121 can support part of the structure in bracket 120. Impeller 110 is provided on one axial side of bracket 120. The output shaft of motor 130 is connected to hub 111 in impeller 110. Blades 112 are arranged circumferentially on hub 111. The output shaft of motor 130 drives hub 111 to rotate, hub 111 drives blades 112 to rotate, so that cooling fan 100 can draw in airflow. The airflow direction is from impeller 110 to bracket 120.

[0039] After the airflow passes through the impeller 110, the work done by the impeller 110 causes some of the airflow to flow circumferentially. This circumferentially flowing airflow further passes through the bracket 120, where the airflow velocity decreases, resulting in static pressure recovery and thus increasing the airflow of the cooling fan 100. The closer the axial distance between the bracket 120 and the impeller 110, the more significant the static pressure recovery effect of the bracket 120 will be. However, the stronger the unsteady interference effect between the airflow passing through the impeller 110 and the bracket 120, the greater the aerodynamic noise will be.

[0040] In the scheme of this application, the minimum distance between the blade 112 and the rib 121 is defined as L. min The radial length of blade 112 is H, L min The following relationship exists between L and H: 6% ≤ L minIf the axial distance between the rib 121 and the impeller 110 is reduced excessively ( / H≤14%), it will increase aerodynamic noise. If the axial distance between the rib 121 and the blade 112 is increased excessively, the static pressure recovery effect will decrease, affecting the performance of the cooling fan 100. Therefore, the axial distance between the rib 121 and the blade 112 needs to be optimized. However, since different cooling fans 100 have different sizes, for example, for cooling fans 100 with different radial dimensions, the same axial distance between the rib 121 and the blade 112 will have different performance optimization effects. Therefore, when optimizing the axial distance between the rib 121 and the blade 112, the size of the cooling fan 100 also needs to be considered. In this solution, the minimum axial distance between the rib 121 and the blade 112 is combined with the radial dimension of the blade 112. When L... min H satisfies 6% ≤ L min Under the condition that / H≤14%, aerodynamic efficiency is improved and the performance of cooling fan 100 is optimized without deteriorating aerodynamic noise. Moreover, within the above range, the axial dimension of cooling fan 100 is small, reducing the space occupied by cooling fan 100 in the axial direction, thereby enabling installation of cooling fan 100 in the compact space of the vehicle, and cooling fan 100 is less likely to interfere with other structures.

[0041] Figure 3 The arrow at point E in the middle indicates the direction of airflow.

[0042] For example, L min / H can be 6%, 10%, or 14%.

[0043] Combination Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, optionally, the distance between the two sides of the blade 112 along the axial direction of the cooling fan 100 is L1, and L1 and H satisfy the following condition: 18% ≤ L1 / H ≤ 25%.

[0044] If the axial dimension of the blade 112 is too large, the cooling fan 100 will occupy a large space in the axial direction, thus increasing the difficulty of assembling the cooling fan 100 into the vehicle. If the axial dimension of the blade 112 is too small, the blade 112 will have a poor turbulence effect on the airflow, making it difficult for the cooling fan 100 to quickly draw in airflow.

[0045] In this design, the axial and radial dimensions of the blade 112 are combined, and L1 and H are limited to meet the following conditions: 18% ≤ L1 / H ≤ 25%. Within this range, the axial dimension of the blade 112 will not be too large, thereby reducing the space occupied by the cooling fan 100 in the axial direction, while also ensuring the turbulence effect of the blade 112 on the airflow, thus ensuring that the cooling fan 100 can quickly draw in airflow.

[0046] For example, the value of L1 / H can be 18%, 20%, or 25%.

[0047] Combination Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, optionally, the axial spacing between the two sides of the rib 121 along the axial direction of the cooling fan 100 is L2, and L2 and H satisfy the following condition: 15% ≤ L2 / H ≤ 22%.

[0048] If the rib 121 is too large in the axial direction, it will obstruct the airflow and also result in a larger space in the cooling fan 100 in the axial direction. If the rib 121 is too small in the axial direction, its structural strength will be low, and it will be prone to deformation.

[0049] In this design, the axial dimension of the rib 121 is combined with the radial dimension of the blade 112, limiting L2 and H to meet the following conditions: 15% ≤ L2 / H ≤ 22%. Within this range, the rib 121 is less likely to obstruct airflow, and the axial dimension of the blade 112 will not be too large, thereby reducing the axial space occupied by the cooling fan 100. It also ensures that the rib 121 has high structural strength, prevents deformation of the rib 121, and ensures the relative positional matching of the rib 121 and the blade 112.

[0050] For example, the value of L2 / H is 15%, 20%, or 22%.

[0051] Combination Figure 1 and Figure 2 As shown, in some embodiments, optionally, the distance between the blade 112 and the rib 121 increases and then decreases along the axial direction of the cooling fan 100, from the side of the blade 112 adjacent to the hub 111 to the side of the blade 112 away from the hub 111.

[0052] From the side of blade 112 adjacent to hub 111 to the side of blade 112 away from hub 111, the side of blade 112 facing rib 121 has an arc-shaped structure, so that the axial distance between blade 112 and rib 121 changes continuously from the inside to the outside. In this design, the axial distance between blade 112 and rib 121 is limited to first increase and then decrease from the inside to the outside. Based on this, since there is a difference in the axial distance between blade 112 and rib 121, the airflow from blade 112 to rib 121 is less likely to generate large noise. Moreover, by matching blade 112 and rib 121 through the above structure, it is beneficial to improve the static pressure recovery effect of rib 121 on airflow, thereby improving the performance of cooling fan 100.

[0053] Combination Figure 1 and Figure 2 As shown, in some embodiments, optionally, from the side of the blade 112 adjacent to the hub 111 to the side of the blade 112 away from the hub 111, along the axial direction of the cooling fan 100, the distance between the side of the blade 112 adjacent to the hub 111 and the rib 121 is the smallest, or the distance between the side of the blade 112 away from the hub 111 and the rib 121 is the smallest.

[0054] The axial distance between the blade 112 and the rib 121 increases and then decreases from the inside to the outside. However, the axial distance between the blade 112 and the rib 121 is different on the side closer to the axis and the side farther from the axis. That is, the axial distance between the blade 112 and the rib 121 on the side closer to the axis is greater than or less than the axial distance on the side farther from the axis. Based on this, the noise generated when the airflow passes through the rib 121 can be further reduced.

[0055] like Figure 1 As shown, in some embodiments, optionally, there are multiple blades 112 and multiple ribs 121, and the number of blades 112 is greater than the number of ribs 121.

[0056] The number of blades 112 is greater than the number of ribs 121. The relatively large number of blades 112 allows the cooling fan 100 to drive a larger airflow. The relatively small number of ribs 121 avoids excessive ribs 121 from obstructing the airflow and ensures that the airflow can be smoothly drawn into the cooling fan 100.

[0057] In some embodiments, the number of blades 112 is N1, the number of ribs 121 is N2, and the difference between the number of N1 and N2 satisfies the following condition: 1≤N1-N2≤5.

[0058] The number of blades 112 is greater than the number of ribs 121. If the difference between the number of blades 112 and the number of ribs 121 is large, the static pressure recovery effect of the ribs 121 on the circumferential airflow will be reduced, thus affecting the airflow of the cooling fan 100. This design limits the difference between the number of blades 112 and ribs 121 to less than or equal to 5. For example, if the number of blades 112 is 10, the number of ribs 121 cannot be less than 5, thereby ensuring the static pressure recovery effect of the ribs 121 on the circumferential airflow and improving the performance of the cooling fan 100.

[0059] like Figure 1 As shown, in some embodiments, the cooling fan 100 may optionally include a connecting rib 140, wherein at least a portion of adjacent ribs 121 are connected by the connecting rib 140.

[0060] A connecting rib 140 is provided between two adjacent ribs 121. The two ends of the connecting rib 140 are respectively connected to the two adjacent ribs 121. The outer ring of the multiple ribs 121 is connected to the wind shield 123. The connecting rib 140 supports the two adjacent ribs 121 to prevent the ribs 121 from deforming or bending, thereby ensuring that the ribs 121 can provide stable support for the wind shield 123.

[0061] With the connecting rib 140 supporting the rib 121, the rib 121 is not easily deformed, so that the distance or relative position between the rib 121 and the blade 112 is not easily changed, thereby ensuring the matching degree between the rib 121 and the blade 112, avoiding the increase of noise during the operation of the cooling fan 100 due to the deformation of the rib 121, and ensuring the performance of the cooling fan 100.

[0062] Connecting bars 140 can be provided between any adjacent ribs 121, or connecting bars 140 can be provided only between a portion of adjacent ribs 121.

[0063] like Figure 1 As shown, in some embodiments, optionally, the axis of the arc surface A is set to coincide with the axis of the cooling fan 100, and the rib 121 is cut by the arc surface A, and the cross section of the rib 121 is triangular or airfoil.

[0064] The arc surface A can be a complete annular surface or a non-complete annular surface. The rib 121 is cut off by the arc surface A. The cross-sectional shape of the rib 121 is triangular or airfoil. Of course, in other embodiments, the cross-sectional shape of the rib 121 can also be polygonal, elliptical, etc.

[0065] Figure 4 In the middle, the cross-sectional shape of rib 121 is airfoil-shaped. Figure 5In the middle, the cross-sectional shape of rib 121 is triangular.

[0066] In an embodiment of the present invention, a cooling fan 100 is provided, comprising an impeller 110 and a support 120. The impeller 110 includes a hub 111, blades 112, and a wind shield 113. The root of the blades 112 is connected to the hub 111, and the top of the blades 112 is connected to the wind shield 113. The number of blades 112 is N1. The support 120 includes a wind shield 123, ribs 121, and a connecting cover 122. The root of the ribs 121 is connected to the connecting cover 122, and the top of the ribs 121 is connected to the wind shield 123. The number of ribs 121 is N2. The minimum axial distance L between the trailing edge of the blades 112 and the leading edge of the ribs 121 is... min The ratio of the radial height H of the blade 112 to the radial height H satisfies 6% ≤ L min / H≤14%, and N2≤N1. The cooling fan 100 of the present invention can improve aerodynamic efficiency without deteriorating aerodynamic noise by matching the axial distance between the blades 112 and the ribs 121, while also reducing the overall axial height.

[0067] Impeller 110 is mounted in bracket 120 via motor 130, and the minimum axial distance L between the trailing edge of blade 112 and the leading edge of rib 121 is... min The ratio of the radial height H of the blade 112 to the radial height H satisfies 6% ≤ L min / H≤14%, preferably 8%≤L min / H≤10%.

[0068] Table 1

[0069]

[0070] In Table 1, based on N1-N2=3, in L min / H = 8% and L min With / H = 14%, a comparison of the flow rate of cooling fan 100, the maximum aerodynamic efficiency of cooling fan 100, and the overall noise OA value is shown.

[0071] The axial distance between the trailing edge of blade 112 and the leading edge of rib 121 first increases and then decreases radially, with the minimum distance located at hub 111 or blade tip.

[0072] A motor cable fixing rib 150 is also connected between the connecting cover 122 and the wind shield 123. The motor cable fixing rib 150 is used to fix and guide the cable of the motor 130.

[0073] In an embodiment of the present invention, a vehicle is proposed that includes the cooling fan 100 of any of the above embodiments and can achieve the same technical effect, which will not be described in detail here.

[0074] The vehicles can be either traditional gasoline-powered vehicles or new energy vehicles. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0075] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cooling fan, characterized in that, include: An impeller, comprising a hub and blades, wherein one side of the blades is connected to the hub; A bracket, along the axial direction of the cooling fan, is located on one side of the impeller. The bracket includes a connecting cover and ribs, with one side of the ribs connected to the connecting cover. A motor is connected to the bracket, and the output shaft of the motor passes through the connecting cover and is connected to the hub; Wherein, along the axial direction of the cooling fan, the minimum spacing L between the blades and the ribs is... min Along the radial direction of the cooling fan, the distance between one side of the blade and the other side of the blade is H, L. min H satisfies the following condition: 6% ≤ L min / H≤14%.

2. The cooling fan according to claim 1, characterized in that, Along the axial direction of the cooling fan, the distance between the two sides of the blade is L1, and L1 and H satisfy the following condition: 18% ≤ L1 / H ≤ 25%.

3. The cooling fan according to claim 1, characterized in that, Along the axial direction of the cooling fan, the axial spacing between the two sides of the rib is L2, and L2 and H satisfy the following condition: 15% ≤ L2 / H ≤ 22%.

4. The cooling fan according to any one of claims 1 to 3, characterized in that, Along the axial direction of the cooling fan, from the side of the blade adjacent to the hub to the side of the blade away from the hub, the distance between the blade and the rib first increases and then decreases.

5. The cooling fan according to claim 4, characterized in that, Along the axial direction of the cooling fan, from the side of the blade adjacent to the hub to the side of the blade away from the hub, the distance between the side of the blade adjacent to the hub and the rib is the smallest, or the distance between the side of the blade away from the hub and the rib is the smallest.

6. The cooling fan according to any one of claims 1 to 3, characterized in that, The number of blades and ribs are both multiple, and the number of blades is greater than the number of ribs.

7. The cooling fan according to claim 6, characterized in that, The number of blades is N1, and the number of ribs is N2. The difference between the number of N1 and N2 satisfies the following condition: 1≤N1-N2≤5.

8. The cooling fan according to any one of claims 1 to 3, characterized in that, The cooling fan also includes: A connecting bar, wherein at least a portion of the adjacent ribs are connected by the connecting bar.

9. The cooling fan according to any one of claims 1 to 3, characterized in that, The axis of the arc-shaped surface A is set to coincide with the axis of the cooling fan. The rib is cut by the arc-shaped surface A, and the cross section of the rib is triangular or airfoil-shaped.

10. A vehicle, characterized in that, include: The cooling fan as described in any one of claims 1 to 9.

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