Axial fan

Abstract

The utility model relates to an axial flow fan and an air conditioner, the axial flow fan comprises a hub and a plurality of fan blades, the plurality of fan blades are arranged at intervals along the circumferential direction of the hub, each fan blade comprises a fan blade body, a first reinforcing piece and a second reinforcing piece, the first reinforcing piece is arranged close to the front edge of the fan blade body and the outer edge of the fan blade body, and the second reinforcing piece is arranged close to the front edge of the fan blade body and the inner edge of the fan blade body. The axial flow fan is reasonable in structural design, the structural strength of the axial flow fan can be improved, and the axial flow fan is not prone to deformation during operation and light in weight.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, specifically to an axial flow fan and an air conditioner. Background Technology

[0002] Axial fans are widely used as air supply components in ventilation equipment such as outdoor units of air conditioners. However, axial fans suffer from drawbacks such as heavy blades and a tendency to deform during operation. To address these issues, manufacturers typically incorporate reinforcing ribs on the outer edge of the blades or in the fan's central section to strengthen the local structure. However, these design methods have limited effectiveness in reducing operational deformation and improving structural strength. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose an axial flow fan with a reasonable structural design that can improve the structural strength of the axial flow fan and prevent deformation during operation.

[0005] An embodiment of this utility model also proposes an air conditioner.

[0006] An embodiment of the present invention provides an axial flow fan comprising: a hub and a plurality of fan blades, wherein the plurality of fan blades are arranged at circumferential intervals along the hub, and each fan blade comprises a fan blade body, a first reinforcing member and a second reinforcing member, wherein the first reinforcing member is arranged near the leading edge and the outer edge of the fan blade body, and the second reinforcing member is arranged near the leading edge and the inner edge of the fan blade body.

[0007] According to the embodiments of the present invention, in the axial flow fan, since the first reinforcing member is arranged close to the leading edge and outer edge of the fan blade body, and the second reinforcing member is arranged close to the leading edge and inner edge of the fan blade body, the first and second reinforcing members can specifically reinforce the outer region of the leading edge of the fan blade body and the inner region of the leading edge of the fan blade body, so as to reduce the deformation of the axial flow fan when it rotates, and also help to reduce the overall weight of the axial flow fan and reduce production costs.

[0008] In some embodiments, the first reinforcing member includes a plurality of first reinforcing ribs, which are spaced apart along the direction from the outer edge of the fan blade body to the inner edge of the fan blade body, and the first reinforcing ribs extend along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body.

[0009] In some embodiments, in a projection plane orthogonal to the axial direction of the hub, the extension path of the first reinforcing rib is a first arc, and the center of the first arc is located at the rotation center of the axial fan.

[0010] In some embodiments, the spacing between any two adjacent first reinforcing ribs increases sequentially along the direction from the outer edge of the fan blade body to the inner edge of the fan blade body.

[0011] In some embodiments, the second reinforcing member includes a plurality of second reinforcing ribs, which are spaced apart along the direction from the outer edge of the fan blade body to the inner edge of the fan blade body, and the second reinforcing ribs extend along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body.

[0012] In some embodiments, in a projection plane orthogonal to the axial direction of the hub, the extension path of the second reinforcing rib is a second arc, the center of which is located on the front side of the leading edge of the fan blade body and within the projection contour of the hub.

[0013] In some embodiments, the first reinforcing member includes a first reinforcing rib, and the second reinforcing member includes a second reinforcing rib. Both the first and second reinforcing ribs extend along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body. The first and second reinforcing ribs satisfy at least one of the following conditions:

[0014] The first reinforcing rib has a dimension of N1 along the thickness direction of the fan blade body and a dimension of M1 along the radial direction of the fan blade body, wherein 2mm≤N1≤3mm and 1.5≤M1 / N1≤2.

[0015] The second reinforcing rib has a dimension of N2 along the thickness direction of the fan blade body and a dimension of M2 along the radial direction of the fan blade body, wherein 2mm≤N2≤3mm and 1.5≤M2 / N2≤2;

[0016] The extension path of the first reinforcing rib is a first arc, and the degree measure of the central angle corresponding to the first arc is α1, where 10°≤α1≤20°;

[0017] The extension path of the second reinforcing rib is a second arc, and the degree measure of the central angle corresponding to the second arc is α2, where 10°≤α2≤20°.

[0018] In some embodiments, the fan blade body includes a body region and a first thickened region, the thickness of the first thickened region being greater than the thickness of the body region. The body region includes a first region and a second region, the first region being located at the leading edge of the fan blade body, the second region being located at the trailing edge of the fan blade body, and the first thickened region being located between the first region and the second region along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body.

[0019] In some embodiments, the fan blade body further includes a second thickened region, the thickness of which is greater than the thickness of the first thickened region. The body region also includes a third region and a fourth region. In a projection plane orthogonal to the axial direction of the hub, the second thickened region is located within the outer periphery of the first thickened region, the third region is located between the outer periphery of the first thickened region and the outer periphery of the second thickened region, and the fourth region is located within the outer periphery of the second thickened region.

[0020] In some embodiments, the fan blade further includes a third thickened region, which is arranged near the outer edge of the fan blade body and extends along the direction from the leading edge of the fan blade body to the periphery of the fan blade body. The body region further includes a fifth region, which is located within the outer periphery of the third thickened region in a projection plane orthogonal to the axial direction of the hub.

[0021] In some embodiments, in a projection plane orthogonal to the axial direction of the hub, the outline of the outer edge of the fan blade body is a third arc, the extension path of the third thickened area is a fourth arc, the third arc and the fourth arc are both located at the rotation center of the axial fan, the degree measure of the central angle corresponding to the third arc is β1, the degree measure of the central angle corresponding to the fourth arc is β2, where 0.6≤β2 / β1≤0.8.

[0022] In some embodiments, at least one of the first reinforcing member, the second reinforcing member, and the first thickened area is disposed on the suction surface of the fan blade body.

[0023] Another embodiment of the air conditioner of the present invention includes an axial fan as described in any one of the embodiments of the present invention.

[0024] According to an embodiment of the present invention, the axial fan of the air conditioner has a first reinforcing member arranged near the leading edge and outer edge of the fan blade body, and a second reinforcing member arranged near the leading edge and inner edge of the fan blade body. Thus, the first and second reinforcing members can specifically reinforce the outer region of the leading edge of the fan blade body and the inner region of the leading edge of the fan blade body, thereby reducing the deformation of the axial fan during rotation and helping to reduce the overall weight of the axial fan and lower production costs. Attached Figure Description

[0025] Figure 1 This is a front view of an axial flow fan according to an embodiment of the present invention.

[0026] Figure 2 This is a rear view of an axial fan according to an embodiment of the present invention.

[0027] Figure 3 This is a side view of an axial flow fan according to an embodiment of the present invention.

[0028] Figure 4 This is a perspective view of an axial flow fan according to an embodiment of the present invention.

[0029] Figure 5 This is a partial view of an axial flow fan according to an embodiment of the present invention.

[0030] Figure 6 This is a partial view of the axial fan according to another embodiment of the present invention.

[0031] Figure 7 yes Figure 6 A magnified view of A in the middle.

[0032] Figure 8 yes Figure 6 A magnified view of B in the middle.

[0033] Figure 9 This is a cross-sectional view of the blades of an axial flow fan according to an embodiment of the present invention.

[0034] Figure 10 yes Figure 9 A magnified view of C.

[0035] Figure label:

[0036] 1. Wheel hub;

[0037] 2. Fan blades;

[0038] 21. Fan blade body; 211. Body area; 2111. First area; 2112. Second area; 2113. Third area; 2114. Fourth area; 2115. Fifth area; 212. First thickened area; 213. Second thickened area; 214. Third thickened area;

[0039] 22. First reinforcing member; 221. First reinforcing rib; 23. Second reinforcing member; 231. Second reinforcing rib; 24. Serration; 25. Suction surface;

[0040] L1, the first arc; L2, the second arc; L3, the third arc; L4, the fourth arc. Detailed Implementation

[0041] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] The following is a reference appendix. Figures 1 to 10 This invention describes an axial fan and an air conditioner according to embodiments of the present invention.

[0043] like Figure 1 and Figure 2 As shown, the axial flow fan of this utility model embodiment includes: a hub 1 and a plurality of fan blades 2. The plurality of fan blades 2 are arranged at intervals along the circumference of the hub 1. Each fan blade 2 includes a fan blade body 21, a first reinforcing member 22 and a second reinforcing member 23. The first reinforcing member 22 is arranged near the leading edge and the outer edge of the fan blade body 21, and the second reinforcing member 23 is arranged near the leading edge and the inner edge of the fan blade body 21.

[0044] It is understood that the leading edge of the fan blade body 21 is the front side of the fan blade body 21 along its rotation direction, and the trailing edge of the fan blade body 21 is the rear side of the fan blade body 21 along its rotation direction. The outer edge of the fan blade body 21 is the outer side of the fan blade body 21 along the radial direction of the hub 1, and the inner edge of the fan blade body 21 is the inner side of the fan blade body 21 along the radial direction of the hub 1.

[0045] According to the embodiment of the present invention, in the axial flow fan, since the first reinforcing member 22 is arranged close to the leading edge and the outer edge of the blade body 21, and the second reinforcing member 23 is arranged close to the leading edge and the inner edge of the blade body 21, the first reinforcing member 22 and the second reinforcing member 23 can specifically reinforce the outer region of the leading edge of the blade body 21 and the inner region of the leading edge of the blade body 21, so as to reduce the deformation of the axial flow fan when it rotates, and also help to reduce the overall weight of the axial flow fan and reduce the production cost.

[0046] It is understandable that, compared with the solution of "overall structural reinforcement of the leading edge portion of the fan blade body 21" in related technologies, the axial flow fan of this utility model embodiment specifically strengthens the outer region of the leading edge of the fan blade body 21 and the inner region of the leading edge of the fan blade body 21. This can ensure that the axial flow fan has sufficient structural strength and reduce the arrangement area of ​​the strengthening structure, thereby reducing the overall weight of the axial flow fan.

[0047] like Figure 2 , Figure 5 and Figure 6As shown, the first reinforcing member 22 and the second reinforcing member 23 are both located on the suction surface 25 of the fan blade body 21. When the axial fan rotates, since the first reinforcing member 22 and the second reinforcing member 23 are both located on the suction surface 25 of the fan blade body 21, the interference of the first reinforcing member 22 and the second reinforcing member 23 on the airflow can be reduced, which helps to reduce eddies, reduce air resistance, and improve working efficiency.

[0048] In some embodiments, such as Figures 5 to 7 As shown, the first reinforcing member 22 includes a plurality of first reinforcing ribs 221. The plurality of first reinforcing ribs 221 are arranged at intervals along the direction from the outer edge to the inner edge of the fan blade body 21, and the first reinforcing ribs 221 extend along the direction from the leading edge to the trailing edge of the fan blade body 21. Since the plurality of first reinforcing ribs 221 are arranged at intervals along the direction from the outer edge to the inner edge of the fan blade body 21, compared with the solution of "thickening the entire outer region of the leading edge of the fan blade body 21", the weight of the fan blade 2 can be reduced while ensuring that the fan blade 2 has sufficient structural strength, and the deformation range of the fan blade 2 can be reduced, which is beneficial to improving the stability of the axial flow fan during rotation.

[0049] like Figure 5 and Figure 6 As shown, the distance between the front end of the first reinforcing rib 221 and the leading edge of the fan blade body 21 is smaller than the distance between the rear end of the first reinforcing rib 221 and the trailing edge of the fan blade body 21. In other words, the first reinforcing rib 221 is arranged in the leading edge region of the fan blade body 21 and extends generally along the front-rear direction. This allows for targeted structural reinforcement of the outer leading edge region of the fan blade body 21, reducing the deformation of the axial fan during rotation.

[0050] For example, the number of first reinforcing ribs 221 can be two, three or more.

[0051] In some embodiments, such as Figure 7 As shown, in the projection plane orthogonal to the axis of hub 1, the extension path of the first reinforcing rib 221 is the first arc L1, and the center of the first arc L1 is located at the rotation center of the axial fan. It can be understood that the first reinforcing rib 221 extends along the first arc L1. Since the center of the first arc L1 is located at the rotation center of the axial fan, the resistance of the first reinforcing rib 221 to airflow can be reduced. That is, when the axial fan rotates, the first reinforcing rib 221 has a smaller impact on airflow, which is beneficial to improving the deformation and abnormal noise problems during axial fan operation.

[0052] like Figure 7As shown, the spacing (K1, K2, K3) between any two adjacent first reinforcing ribs 221 increases sequentially along the direction from the outer edge to the inner edge of the fan blade body 21. This improves the rationality of the arrangement of the first reinforcing ribs 221 and enhances the structural strength of the outer leading edge region of the fan blade body 21.

[0053] For example, such as Figure 7 As shown, in the direction from the outer edge to the inner edge of the fan blade body 21, the spacing between every two adjacent first reinforcing ribs 221 is K1, K2, and K3, respectively, and K1, K2, and K3 are arranged in an increasing arithmetic sequence. For example, the tolerance of this increasing arithmetic sequence can be 0.03R, where R is the radius of the axial fan.

[0054] In some embodiments, such as Figure 6 and Figure 8 As shown, the second reinforcing member 23 includes a plurality of second reinforcing ribs 231, which are arranged at intervals along the direction from the outer edge of the fan blade body 21 to the inner edge of the fan blade body 21, and the second reinforcing ribs 231 extend along the direction from the leading edge of the fan blade body 21 to the trailing edge of the fan blade body 21.

[0055] Since multiple second reinforcing ribs 231 are arranged at intervals along the direction from the outer edge to the inner edge of the blade body 21, compared with the solution of "thickening the inner area of ​​the leading edge of the blade body 21 as a whole", the weight of the blade 2 can be reduced while ensuring that the blade 2 has sufficient structural strength, and the deformation range of the blade 2 can be reduced, which is beneficial to improving the stability of the axial flow fan during rotation.

[0056] like Figure 6 and Figure 8 As shown, the distance between the front end of the second reinforcing rib 231 and the leading edge of the blade body 21 is smaller than the distance between the rear end of the second reinforcing rib 231 and the trailing edge of the blade body 21. In other words, the second reinforcing rib 231 is arranged in the leading edge region of the blade body 21 and extends generally along the front-rear direction. This allows for targeted structural reinforcement of the inner region of the leading edge of the blade body 21, reducing the deformation of the axial fan during rotation.

[0057] In some embodiments, such as Figure 8 As shown, in the projection plane orthogonal to the axis of the hub 1, the extension path of the second reinforcing rib 231 is the second arc L2. The center of the second arc L2 is located on the front side of the leading edge of the fan blade body 21 and is located within the projection outline of the hub 1.

[0058] It is understandable that the second reinforcing rib 231 extends along the second arc L2. Since the center of the second arc L2 is located on the front side of the leading edge of the fan blade body 21 and within the axial projection contour of the hub 1, the resistance of the second reinforcing rib 231 to the airflow can be reduced. That is, when the axial fan rotates, the second reinforcing rib 231 has a smaller impact on the airflow, which is beneficial to improving the deformation and abnormal noise problems when the axial fan is running.

[0059] For example, the center of the second arc is located at the junction of the previous fan blade 2 and the hub 1 along the rotation direction of the axial fan, and the center of the second arc is located at the suction surface 25 of the previous fan blade 2.

[0060] In some embodiments, such as Figures 5 to 8 As shown, the first reinforcing member 22 includes a first reinforcing rib 221, and the second reinforcing member 23 includes a second reinforcing rib 231. Both the first reinforcing rib 221 and the second reinforcing rib 231 extend along the direction from the leading edge to the trailing edge of the fan blade body 21. The thickness of the first reinforcing rib 221 (i.e., the dimension of the first reinforcing rib 221 along the thickness direction of the fan blade body 21) is N1, and the width of the first reinforcing rib 221 (i.e., the radial dimension of the first reinforcing rib 221 along the radial direction of the fan blade body 21) is M1, where 2mm ≤ N1 ≤ 3mm, and 1.5 ≤ M1 / N1 ≤ 2. It should be noted that the thickness of the first reinforcing rib 221 is consistent with the thickness direction of the fan blade body 21, and the width of the first reinforcing rib 221 is consistent with the radial direction of the axial flow fan.

[0061] For example, N1 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, or 3mm, and M1 / N1 can be 1.5, 1.6, 1.7, 1.8, 1.9, or 2mm.

[0062] like Figure 7 As shown, the extension path of the first reinforcing rib 221 is the first arc L1, and the degree measure of the central angle corresponding to the first arc L1 is α1, where 10°≤α1≤20°. For example, α1 can be 10°, 12°, 14°, 16°, 18°, or 20°.

[0063] This allows for optimization of the structure of the first reinforcing rib 221, improving the rationality of its arrangement. This, in turn, reduces the weight of the fan blade 2 while ensuring the structural strength of the outer region of the leading edge of the fan blade body 21, making the axial flow fan operate more stably.

[0064] like Figure 6 and Figure 8As shown, the thickness of the second reinforcing rib 231 (i.e., the dimension of the second reinforcing rib 231 along the thickness direction of the fan blade body 21) is N2, and the width of the second reinforcing rib 231 (i.e., the radial dimension of the second reinforcing rib 231 along the radial direction of the fan blade body 21) is M2, where 2mm≤N2≤3mm, and 1.5≤M2 / N2≤2. For example, N2 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, or 3mm, and M2 / N2 can be 1.5, 1.6, 1.7, 1.8, 1.9, or 2.

[0065] like Figure 8 As shown, the extension path of the second reinforcing rib 231 is the second arc L2, and the degree measure of the central angle corresponding to the second arc is α2, where 10°≤α2≤20°. For example, α2 can be 10°, 12°, 14°, 16°, 18°, or 20°.

[0066] This allows for optimization of the structure of the second reinforcing rib 231, improving the rationality of its arrangement. This, in turn, reduces the weight of the fan blade 2 while ensuring the structural strength of the outer region of the leading edge of the fan blade body 21, making the axial flow fan operate more stably.

[0067] like Figure 2 and Figure 3 As shown, the first reinforcing rib 221 and the second reinforcing rib 231 are both strip-shaped protrusions. By setting the first reinforcing rib 221 and the second reinforcing rib 231, the axial flow fan of this utility model can not only reduce the weight of the fan blade 2, but also ensure the structural strength of the fan blade 2 and reduce its deformation range, and also reduce the aerodynamic noise when the axial flow fan rotates, thus improving the problem of abnormal noise when the axial flow fan rotates.

[0068] In some embodiments, such as Figure 2 and Figure 3 As shown, the fan blade body 21 includes a body region 211 and a first thickened region 212. The thickness of the first thickened region 212 is greater than the thickness of the body region 211. The body region 211 includes a first region 2111 and a second region 2112. The first region 2111 is located at the leading edge of the fan blade body 21, and the second region 2112 is located at the trailing edge of the fan blade body 21. The first thickened region 212 is located between the first region 2111 and the second region 2112 along the direction from the leading edge to the trailing edge of the fan blade body 21.

[0069] Understandably, the first thickened region 212 is generally located in the middle area between the leading edge and the trailing edge of the fan blade body 21. During injection molding of the fan blade 2, the relatively thick position of the first thickened region 212 promotes the flow of molten injection molding liquid within the mold, thereby improving the flow of the injection molding liquid and making the axial fan injection molding more stable, which is beneficial to improving product quality. On the other hand, the first thickened region 212 can locally strengthen the structure of the fan blade body 21, reducing the amount of deformation when the axial fan rotates, and improving the stability of the axial fan during rotation.

[0070] like Figure 5 and Figure 6 As shown, the first thickened area 212 is connected to the outer wall surface of the hub 1, which can improve the structural strength of the connection between the hub 1 and the fan blade 2 and reduce the risk of breakage at the connection between the fan blade 2 and the hub 1.

[0071] In some embodiments, such as Figure 5 , Figure 6 and Figure 9 As shown, the fan blade body 21 also includes a second thickened region 213. The thickness of the second thickened region 213 is greater than the thickness of the first thickened region 212. In the projection plane orthogonal to the axial direction of the hub 1, the second thickened region 213 is located within the outer periphery of the first thickened region 212. During the injection molding of the fan blade 2, the greater thickness of the second thickened region 213 promotes the flow of molten injection molding liquid within the mold, thereby improving the flow of the injection molding liquid within the mold. This makes the injection molding of the axial fan more stable and helps improve product manufacturing quality.

[0072] like Figure 5 , Figure 6 and Figure 9 As shown, the body region 211 also includes a third region 2113 and a fourth region 2114. The third region 2113 is located between the outer periphery of the first thickened region 212 and the outer periphery of the second thickened region 213, and the fourth region 2114 is located within the outer periphery of the second thickened region 213. It can be understood that the thicknesses of both the third region 2113 and the fourth region 2114 are less than the thicknesses of the first thickened region 212 and the second thickened region 213. This allows for localized thinning of the first thickened region 212 and the second thickened region 213, reducing the weight of the fan blade body 21 while ensuring sufficient structural strength, thereby saving production costs and facilitating a lightweight design of the fan blade body 21.

[0073] Among them, such as Figure 10As shown, the distance b0 between the outer periphery of the fourth region 2114 and the outer periphery of the second thickened region 213 is between 0.03D and 0.05D, where D is the outer diameter of the axial fan. This allows for a reduction in the weight of the fan blade body 21 while ensuring sufficient structural strength.

[0074] For example, such as Figure 5 and Figure 6 As shown, the third region 2113 is located behind the fourth region 2114, meaning that the third region 2113 is closer to the trailing edge of the blade body 21 than the fourth region 2114. There can be multiple third regions 2113, which are arranged at intervals along the direction from the inner edge to the outer edge of the blade body 21.

[0075] like Figure 5 , Figure 6 and Figure 9 As shown, the fan blade 2 also includes a third thickened region 214, which is arranged near the outer edge of the fan blade body 21 and extends along the direction from the leading edge of the fan blade body 21 to the surrounding edge of the fan blade body 21. The body region 211 also includes a fifth region 2115, which is located within the outer periphery of the third thickened region 214 in a projection plane orthogonal to the axis of the hub 1. It can be understood that the third thickened region 214 can specifically strengthen the outer edge of the fan blade body 21 to reduce the deformation of the axial flow fan during rotation, improve the stability of the axial flow fan during rotation, and reduce the abnormal noise caused by the rotation of the axial flow fan to a certain extent.

[0076] For example, such as Figure 7 As shown, the width of the fifth region 2115 is b1, and the distance between the outer perimeter of the fifth region 2115 and the outer perimeter of the third thickened region 214 is b2, where b1≈2b2.

[0077] In some embodiments, such as Figure 6 As shown, in the projection plane orthogonal to the axis of hub 1, the outline of the outer edge of the fan blade body 21 is the third arc L3, and the extension path of the third thickened region 214 is the fourth arc L4. Both the third arc L3 and the fourth arc L4 are located at the rotation center of the axial fan. This reduces the turbulence of the protruding structure of the third thickened region 214 on the airflow, which helps to reduce the generation of vortices and improve the working efficiency of the axial fan.

[0078] The central angle corresponding to the third arc L3 is β1, and the central angle corresponding to the fourth arc L4 is β2, where 0.6 ≤ β2 / β1 ≤ 0.8. For example, β2 / β1 can be 0.6, 0.65, 0.7, 0.75, or 0.8. This improves the rationality of the structural arrangement of the third thickened zone 214.

[0079] In some embodiments, such as Figure 5 and Figure 6 As shown, the first thickened region 212, the second thickened region 213, and the third thickened region 214 are all located on the suction surface 25 of the fan blade body 21 (body region 211). When the axial fan rotates, the interference of the protruding structures of the first thickened region 212, the second thickened region 213, and the third thickened region 214 on the airflow can be reduced, which helps to reduce eddies, lower air resistance, and improve working efficiency.

[0080] For example, such as Figure 10 As shown, the thickness of the first thickened region 212 is T1, and the outer diameter of the axial fan is D. Where 0.1D ≤ T1 ≤ 0.2D, the larger the outer diameter of the axial fan, the closer the value of T1 is to 0.1D. The thickness of the second thickened region 213 is T2, and 1.5T1 ≤ T2 ≤ 2T2. The larger the outer diameter of the axial fan, the closer the value of T2 is to 1.5T1. The thickness of the third thickened region 214 is T3, and the thickness of T3 is approximately equal to the thickness of T2.

[0081] Another embodiment of the air conditioner of this utility model includes the axial fan of this utility model. In one example, the axial fan is installed inside the casing of the outdoor unit of the air conditioner.

[0082] According to an embodiment of the present invention, the axial fan of the air conditioner has a first reinforcing member 22 arranged near the leading edge and outer edge of the fan blade body 21, and a second reinforcing member 23 arranged near the leading edge and inner edge of the fan blade body 21. Thus, the first reinforcing member 22 and the second reinforcing member 23 can specifically reinforce the outer region of the leading edge of the fan blade body 21 and the inner region of the leading edge of the fan blade body 21, thereby reducing the deformation of the axial fan during rotation and helping to reduce the overall weight of the axial fan and reduce production costs.

[0083] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0084] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0085] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0086] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0087] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 this utility model. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An axial flow fan characterised in that, include: Wheel hub; Multiple fan blades are arranged at circumferential intervals along the hub. Each fan blade includes a fan blade body, a first reinforcing member, and a second reinforcing member. The first reinforcing member is arranged near the leading edge and outer edge of the fan blade body, and the second reinforcing member is arranged near the leading edge and inner edge of the fan blade body.

2. The axial fan according to claim 1, characterized in that The first reinforcing member includes a plurality of first reinforcing ribs, which are spaced apart along the direction from the outer edge of the fan blade body to the inner edge of the fan blade body, and the first reinforcing ribs extend along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body.

3. The axial fan according to claim 2, characterized in that In a projection plane orthogonal to the axial direction of the hub, the extension path of the first reinforcing rib is a first arc, and the center of the first arc is located at the rotation center of the axial fan. And / or, the spacing between any two adjacent first reinforcing ribs increases sequentially along the direction from the outer edge of the fan blade body to the inner edge of the fan blade body.

4. The axial fan according to claim 1, characterized in that The second reinforcing member includes a plurality of second reinforcing ribs, which are spaced apart along the direction from the outer edge of the fan blade body to the inner edge of the fan blade body, and the second reinforcing ribs extend along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body.

5. The axial fan according to claim 4, characterized in that In a projection plane orthogonal to the axial direction of the hub, the extension path of the second reinforcing rib is a second arc, the center of which is located on the front side of the leading edge of the fan blade body and within the projection outline of the hub.

6. The axial fan according to claim 1, wherein The first reinforcing member includes a first reinforcing rib, and the second reinforcing member includes a second reinforcing rib. Both the first and second reinforcing ribs extend along the direction from the leading edge to the trailing edge of the fan blade body. The first and second reinforcing ribs satisfy at least one of the following conditions: The first reinforcing rib has a dimension of N1 along the thickness direction of the fan blade body and a dimension of M1 along the radial direction of the fan blade body, wherein 2mm≤N1≤3mm and 1.5≤M1 / N1≤2. The second reinforcing rib has a dimension of N2 along the thickness direction of the fan blade body and a dimension of M2 along the radial direction of the fan blade body, wherein 2mm≤N2≤3mm and 1.5≤M2 / N2≤2; The extension path of the first reinforcing rib is a first arc, and the degree measure of the central angle corresponding to the first arc is α1, where 10°≤α1≤20°; The extension path of the second reinforcing rib is a second arc, and the degree measure of the central angle corresponding to the second arc is α2, where 10°≤α2≤20°.

7. The axial fan according to any one of claims 1-6, characterized in that The fan blade body includes a body region and a first thickened region. The thickness of the first thickened region is greater than the thickness of the body region. The body region includes a first region and a second region. The first region is located at the leading edge of the fan blade body, and the second region is located at the trailing edge of the fan blade body. The first thickened region is located between the first region and the second region along the direction from the leading edge of the fan blade body to the trailing edge of the fan blade body.

8. The axial fan according to claim 7, characterized in that The fan blade body also includes a second thickened region, the thickness of which is greater than that of the first thickened region. The body area also includes a third region and a fourth region. In a projection plane orthogonal to the axis of the hub, the second thickened region is located within the outer periphery of the first thickened region, the third region is located between the outer periphery of the first thickened region and the outer periphery of the second thickened region, and the fourth region is located within the outer periphery of the second thickened region.

9. The axial fan according to claim 7, wherein The fan blade also includes a third thickened region, which is arranged near the outer edge of the fan blade body and extends along the direction from the leading edge of the fan blade body to the periphery of the fan blade body. The body area also includes a fifth region, which is located within the outer periphery of the third thickened region in a projection plane orthogonal to the axial direction of the hub.

10. The axial fan according to claim 7, wherein The first reinforcing member, the second reinforcing member, and at least one of the first thickened area are disposed on the suction surface of the fan blade body.

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