Fan blade, wind wheel, fan, air conditioner outdoor unit and air conditioner

Abstract

The utility model relates to a fan blade, a wind wheel, a fan, an air conditioner outdoor unit and an air conditioner. The suction surface of the fan blade is provided with a first arrangement area and a second arrangement area, and the fan blade comprises a plurality of concave units arranged in the first arrangement area and a plurality of convex units arranged in the second arrangement area. According to the technical scheme, the concave unit structure combination and the convex unit structure combination which are different in shape are arranged on the fan blade, airflow separation can be restrained, fluid resistance can be reduced, the air volume can be increased, the efficiency of a fan can be improved, and aerodynamic noise can be reduced.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning equipment technology, and in particular to a fan blade, a fan wheel, a fan, an outdoor air conditioning unit, and an air conditioner. Background Technology

[0002] Fans, such as axial flow fans, are widely used in industrial and residential ventilation and heat dissipation. They utilize motors to drive high-speed rotating fan blades to perform work on the air. Once the air achieves a certain flow rate and pressure, it is discharged from the air outlet. Therefore, fan blades have a significant impact on fan efficiency. Some related technologies incorporate non-smooth structures on the fan blades; however, how to arrange these non-smooth structures to achieve optimal fan efficiency and lower aerodynamic noise is the key to fan blade design. Utility Model Content

[0003] To overcome the problems existing in the related technologies, this disclosure provides a fan blade, a fan wheel, a fan, an air conditioner outdoor unit, and an air conditioner.

[0004] According to a first aspect of the present disclosure, a fan blade is provided, wherein the suction surface of the fan blade is provided with a first arrangement area and a second arrangement area, and the fan blade includes a plurality of recessed units provided in the first arrangement area and a plurality of protruding units provided in the second arrangement area.

[0005] Optionally, the first and second layout areas are arranged along the direction from the leading edge to the trailing edge of the wind turbine blade.

[0006] Optionally, the first deployment area is located on one side of the leading edge of the wind turbine blade, and the second deployment area is located on one side of the trailing edge of the wind turbine blade.

[0007] Optionally, the recessed unit is constructed as a polygon, and a plurality of the recessed units are spaced apart along the direction from the tip of the wind turbine blade to the root.

[0008] Optionally, the recessed unit includes a first recessed unit disposed adjacent to the blade tip, the first recessed unit being constructed as a triangle, the first recessed unit including a first bottom contour line, the first bottom contour line being formed by offsetting the blade tip curve.

[0009] Optionally, the offset distance of the first bottom edge contour line relative to the blade tip curve is 10~16 mm.

[0010] Optionally, the length of the first bottom contour line is 60~70 mm.

[0011] Optionally, the recessed unit further includes a second recessed unit disposed adjacent to the leaf root. The second recessed unit is constructed in the shape of a triangle and includes a second bottom contour line, which is formed by offsetting the leaf root curve.

[0012] Optionally, the offset distance of the second bottom contour line relative to the leaf root curve is 110~130 mm.

[0013] Optionally, the length of the second bottom edge profile is 45~55 mm.

[0014] Optionally, the recessed unit is constructed as a triangle, and the maximum distance between the two waistline contours of the recessed unit that are closer to the leading edge curve and the leading edge curve is 5~10 mm; and / or the maximum distance between the two waistline contours of the recessed unit that are farther from the leading edge curve and the leading edge curve is 20~30 mm.

[0015] Optionally, the recessed depth of the recessed unit is 1~1.5 mm.

[0016] Optionally, the protruding unit is constructed in the shape of a triangular pyramid.

[0017] Optionally, the bottom edge length of the protruding unit is 11~15 mm, and / or the height of the protruding unit is 0.5~1 mm.

[0018] Optionally, the plurality of protruding units are evenly distributed, and the distance between the bottom edges of two adjacent protruding units is 15~25 mm.

[0019] Optionally, the distribution density of the plurality of protrusion units at the leaf tip is greater than that at the leaf root.

[0020] Optionally, the distance between the protruding unit closest to the trailing edge curve and the trailing edge curve is 12~22 mm.

[0021] Optionally, the second deployment area occupies 3 / 4 of the total area of ​​the wind turbine blades.

[0022] Optionally, the first and second layout areas are arranged along the direction from the tip of the wind turbine blade to the root.

[0023] Optionally, the first deployment area is located on the tip side of the wind turbine blade, and the second deployment area is located on the root side of the wind turbine blade.

[0024] According to a second aspect of the present disclosure, a wind turbine is provided, including a hub and a plurality of wind turbine blades circumferentially spaced on the outer peripheral wall of the hub, wherein the wind turbine blades are any of the wind turbine blades described above.

[0025] Optionally, the hub has multiple reinforcing ribs spaced circumferentially inside, the reinforcing ribs extending from the trailing edge of the previous wind turbine blade to the leading edge of the next wind turbine blade, and the reinforcing ribs have notches that transition with the arc of the hub.

[0026] According to a third aspect of the present disclosure, a wind turbine is provided, comprising the impeller of any one of the above-described embodiments.

[0027] According to a fourth aspect of the present disclosure, an air conditioner outdoor unit is provided, including a fan of any one of the above.

[0028] According to a fifth aspect of the present disclosure, an air conditioner is provided, comprising an outdoor unit of any of the above-mentioned embodiments.

[0029] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: The fan blades provided by this disclosure have a first arrangement area and a second arrangement area on the suction surface. The first arrangement area has recessed units, and the second arrangement area has raised units. Specifically, the fan blades provided by this disclosure have a combination of two different shapes of unit structures, recessed and raised. The recessed units cause the airflow to form vortices when it flows through, reducing the turbulent kinetic energy of the fluid, reducing the occurrence of vortex shedding, suppressing airflow separation and providing weight reduction. The raised units can break large-scale vortices into small-scale vortices. The interaction between the small-scale vortices and the large-scale vortices makes the fan blades subjected to uniform force. At the same time, the flow-dividing gaps formed between the raised units also help guide the flow of airflow, thereby reducing fluid resistance and increasing air volume, thereby improving the efficiency of the fan and reducing aerodynamic noise.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0032] Figure 1 This is a schematic diagram of the structure of a wind turbine blade according to an exemplary embodiment.

[0033] Figure 2 This is a schematic diagram of a wind turbine structure according to an exemplary embodiment.

[0034] Figure 3 This is a schematic diagram of the structure of a wind turbine from another perspective, according to an exemplary embodiment.

[0035] Explanation of reference numerals in the attached figures

[0036] 1-Wind turbine blade, 11-Recessed unit, 111-First recessed unit, 1111-First bottom edge contour line, 112-Second recessed unit, 1121-Second bottom edge contour line, 12-Protruding unit, 13-Blade tip curve, 14-Blade root curve, 15-Leading edge curve, 16-Tail edge curve, 2-Hub, 21-Reinforcing rib, 211-Notch. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0038] like Figures 1 to 3 As shown, this disclosure provides a fan blade 1 through an exemplary embodiment. This fan blade 1 is suitable for applications such as axial flow fans in air conditioning outdoor units, industrial fans, and other axial flow fans. Specifically, the suction surface of the fan blade 1 provided in this disclosure is provided with a first arrangement area A and a second arrangement area B. The fan blade 1 includes a plurality of recessed units 11 disposed in the first arrangement area A and a plurality of protruding units 12 disposed in the second arrangement area B.

[0039] The suction surface, also known as the negative pressure surface or the air inlet surface, is where the fluid in the boundary layer may lose kinetic energy when the airflow passes through it. This can be caused by excessive curvature of the blade surface or uneven airflow velocity distribution, leading to the airflow detaching from the blade surface and forming a vortex region. This can easily cause flow separation, resulting in problems such as reduced fan efficiency and increased noise.

[0040] The present invention provides recessed units 11 and raised units 12 on the suction surface, that is, the fan blade 1 provided by the present invention is provided with a combination of two different shapes of unit structures, namely recessed and raised, in order to obtain better fan efficiency and lower aerodynamic noise.

[0041] When airflow passes over the suction surface, vortices can be formed inside the recessed unit 11. These vortices can reduce the turbulent kinetic energy level of the fluid and reduce the occurrence of vortex shedding, thereby suppressing airflow separation. This can improve the efficiency of the fan and reduce aerodynamic noise. At the same time, since the recess is a subtractive manufacturing process, it is also beneficial to reduce the weight of the fan blade 1.

[0042] The protruding unit 12 can be regarded as a vortex generator, which can break the large-scale vortex that flows through into small-scale vortices. These small-scale vortices interact with the large-scale vortices, which also helps to suppress the separation of airflow and make the force on the fan blade 1 more uniform. At the same time, the protruding units 12 can form flow split gaps, which can guide the flow of airflow, thereby reducing fluid resistance and increasing air volume, thereby improving the efficiency of the fan and reducing aerodynamic noise. In addition, the protrusion belongs to the additive manufacturing process, so it is also beneficial to enhance the structural strength of the fan blade 1.

[0043] According to design requirements, in some embodiments, the first deployment area A and the second deployment area B can be configured to be arranged along the direction from the leading edge to the trailing edge of the wind turbine blade 1, that is, the first deployment area A and the second deployment area B are located in... Figure 1 The first and second installation areas are arranged in a left-right direction. In other embodiments, the first installation area A and the second installation area B can also be configured to be arranged along the blade tip to the blade root of the wind turbine blade 1, that is, the first installation area A and the second installation area B are arranged in a left-right direction. Figure 1 The arrangement is in the vertical direction. Examples will be provided below.

[0044] The first deployment area A and the second deployment area B can be configured to be arranged along the leading edge to the trailing edge of the wind turbine blade 1. In some embodiments, such as... Figure 1 As shown, the first arrangement area A is located on one side of the leading edge of the fan blade 1, and the second arrangement area is located on one side of the trailing edge of the fan blade 1. The leading edge of the fan blade 1 directly contacts the incoming airflow, so it is necessary to consider reducing resistance and preventing flow separation. The trailing edge is where the airflow leaves the blade, so it is necessary to control the wake, reduce energy loss, and suppress eddies. In the fan blade 1 provided in this disclosure, the first arrangement area A is located on one side of the leading edge of the fan blade 1, and the second arrangement area is located on one side of the trailing edge of the fan blade 1. That is, the recessed unit 11 and the raised unit 12 can be specifically arranged according to the aerodynamic performance and force characteristics of the fan blade 1 during operation. The recessed unit 11 can reduce resistance and prevent flow separation, while the raised unit 12, located on the trailing edge, can control the wake, reduce energy loss, and suppress eddies. In some other embodiments, the first arrangement area A can also be located on one side of the trailing edge of the fan blade 1, and the second arrangement area B can be located on one side of the leading edge of the fan blade 1, which will not be elaborated here.

[0045] Any recessed structure that can reduce resistance and prevent flow separation can be applied to this disclosure. For example, the recessed unit 11 can be constructed as a polygon, and multiple recessed units 111 are spaced apart along the direction from the tip of the fan blade 1 to the root, thereby suppressing airflow separation and reducing weight.

[0046] In some implementations, such as Figure 1As shown, the recessed unit 11 includes a first recessed unit 111 located near the blade tip. The first recessed unit 111 is triangular in shape and includes a first base contour line 1111, which is formed by offsetting the blade tip curve 13. The blade tip region of the fan blade 1 is sensitive to aerodynamic performance. The placement of the first recessed unit 111 near the blade tip helps to further improve aerodynamic performance. The fact that the first base contour line 1111 of the first recessed unit 111 is formed by offsetting the blade tip curve 13, i.e., the first base contour line 1111 and the blade tip curve 13 are concentric circles, allows the first recessed unit 111 to conform to the shape of the fan blade 1 to the greatest extent, resulting in a larger recessed unit area and improving the effect of suppressing airflow separation. It should be noted that the base contour line here is defined for ease of description. From other viewing angles, the base contour can also be considered as the waistline contour of the triangle, but this does not affect the realization of the structure and function of the recessed unit 111.

[0047] To achieve a larger weight-reduction area while ensuring the structural strength of the wind turbine blade 1, in some embodiments, the offset distance of the first bottom edge contour line 1111 relative to the blade tip curve 13 is 10~16 mm. These offset distances can be reasonably set, for example, according to the shape of the wind turbine blade 1 and the distribution of the maximum stress point during operation. Furthermore, the length of the first bottom edge contour line 1111 can be 60~70 mm. In addition, the recess depth of the first recessed unit 111 can be configured to be 1~1.5 mm. By configuring the depth of the first recessed unit 111 within a reasonable range, the effect of suppressing airflow separation can be improved without affecting the strength of the wind turbine blade 1.

[0048] In other implementations, such as Figure 1 As shown, the recessed unit 11 also includes a second recessed unit 112 disposed adjacent to the blade root. The second recessed unit 112 is triangular in shape and includes a second bottom contour line 1121, which is formed by offsetting the blade root curve 14. Similar to the first recessed unit 111, the second bottom contour line 1121 of the second recessed unit 112 is formed by offsetting the blade root curve 14, which can maximize the fit with the shape of the fan blade 1, obtain a larger recessed unit area, and improve the effect of suppressing airflow separation.

[0049] The blade root connects to the hub 2 and bears a large load and fatigue stress. Therefore, compared to the blade tip, it is not suitable to set a large area for weight reduction near the blade root. Therefore, in some embodiments, the offset distance of the second bottom edge profile 1121 relative to the blade root curve 14 is 110~130 mm, which is beneficial to improve the efficiency of the wind turbine and minimize weight while ensuring the structural strength of the wind turbine blade 1. Furthermore, the length of the second bottom edge profile 1121 can be 45~55 mm. In addition, the recess depth of the second recessed unit 112 can be configured to be 1~1.5 mm. By configuring the depth of the second recessed unit 111 within a reasonable range, the effect of suppressing airflow separation can be improved without affecting the strength of the wind turbine blade 1.

[0050] The efficiency of the fan can be improved by designing the proportion of the recessed unit 11 and the raised unit 12 on the fan blade 1. In some embodiments, the second arrangement area occupies 3 / 4 of the total area of ​​the fan blade 1. By rationally configuring the proportion of the recessed unit 11 and the raised unit 12 on the fan blade 1, for example, making the area of ​​the first arrangement area A smaller than the area of ​​the second arrangement area B, the proportion of the leading edge recess is small, which can avoid excessive disturbance of the main flow field, while the proportion of the trailing edge raised unit is large, which can more effectively control the wake separation, thereby improving the fan efficiency and reducing aerodynamic noise. In terms of structural strength, a small leading edge recess area can reduce the weakening of the blade strength, while a large trailing edge raised area enhances structural stability and avoids fatigue failure due to insufficient stiffness.

[0051] This disclosure does not limit the shape of the protruding unit 12. For example, the protruding unit 12 may be constructed as a triangular pyramid shape as briefly described later, or in other embodiments, the protruding unit 12 may be constructed as a hemispherical protrusion or scale shape, etc.

[0052] The shape, size, and distribution density of the protruding units 12 can all affect the improvement of wind turbine efficiency. Taking a triangular pyramidal structure as an example, the base length of the protruding unit 12 can be constructed to be 11~15 mm, and / or the height of the protruding unit 12 can be constructed to be 0.5~1 mm. Multiple protruding units 12 can be evenly or unevenly distributed. In an embodiment where multiple protruding units 12 are evenly distributed, the distance between the bases of two adjacent protruding units 12 is 15~25 mm. By reasonably setting the distance between the protruding units 12, it is beneficial to further improve wind turbine efficiency. In an embodiment where multiple protruding units 12 are unevenly distributed, the distribution density of the multiple protruding units 12 at the blade tip is greater than the distribution density at the blade root. This is beneficial to improve wind turbine efficiency while ensuring the structural strength of the wind turbine blade 1.

[0053] like Figure 1As shown, the distance between the protruding unit 12 closest to the trailing edge curve 16 and the trailing edge curve 16 is 12~22 mm, meaning the protruding unit 12 may not be directly attached to the trailing edge curve 16. Furthermore, the maximum distance between the two waistline contours of the recessed unit 11 that is closer to the leading edge curve 15 and the leading edge curve 15 can be 5~10 mm; and / or the maximum distance between the two waistline contours of the recessed unit 11 that is farther from the leading edge curve 15 and the leading edge curve 15 can be 20~30 mm. This avoids excessive interference with sensitive flow areas and protects weak structural components.

[0054] The first arrangement area A and the second arrangement area B are arranged along the direction from the tip of the wind turbine blade 1 towards the root. In some embodiments, the first arrangement area is located on the tip side of the wind turbine blade 1, and the second arrangement area is located on the root side of the wind turbine blade 1. A recessed unit 11 is provided at the tip position, which is more sensitive to aerodynamic performance, to suppress airflow separation while providing greater weight reduction. At the root position, which connects to the hub 2 and bears greater loads and fatigue stress, a raised unit 12 is provided to break up vortices and guide airflow while ensuring the structural strength of the wind turbine blade 1.

[0055] According to a second aspect of the embodiments of this disclosure, such as Figure 2 and Figure 3 As shown, a wind turbine is also provided, including a hub 2 and a plurality of wind turbine blades 1 circumferentially spaced on the outer peripheral wall of the hub 2. The wind turbine blades 1 are any of the wind turbine blades mentioned above and have all their beneficial effects, which will not be elaborated here.

[0056] In some implementations, such as Figure 3 As shown, multiple reinforcing ribs 21 are spaced circumferentially inside the hub 2. The reinforcing ribs 21 extend from the trailing edge of the previous fan blade 1 to the leading edge of the next fan blade 1, and each reinforcing rib 21 has a notch 211 that transitions seamlessly with the hub 2 using an arc. This design ensures structural strength at the hub 2 while effectively saving material and further reducing impeller weight. Furthermore, the arc transition avoids stress concentration, further enhancing structural strength.

[0057] According to a third aspect of the present disclosure, a wind turbine is also provided, including the impeller of any one of the above-mentioned embodiments.

[0058] According to a fourth aspect of the present disclosure, an air conditioner outdoor unit is also provided, including the fan of any one of the above.

[0059] According to a fifth aspect of the present disclosure, an air conditioner is also provided, comprising an outdoor unit of any of the above-mentioned air conditioners.

[0060] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of this disclosure by way of illustration. In this regard, terms indicating direction or positional relationship, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” are used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0061] It should be understood that, unless otherwise specifically indicated, features of various embodiments of this disclosure described herein can be combined with each other. As used herein, the term “and / or” includes any one of the relevant listed items and any combination of any two or more; similarly, “at least one of…” includes any one of the relevant listed items and any combination of any two or more.

[0062] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0063] Furthermore, the term "above" as used herein with respect to components, elements, or material layers formed or located "above" a surface may be used to indicate that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the term "above" as used with respect to components, elements, or material layers formed or located "above" a surface may also optionally have a specific meaning: that the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, for example, in direct contact with the surface.

[0064] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. 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 herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0066] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0067] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0068] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0069] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A wind turbine blade, c h a r a c t e r i s e d in that The suction surface of the fan blade is provided with a first layout area and a second layout area, the fan blade comprises a plurality of concave units arranged in the first layout area and a plurality of convex units arranged in the second layout area.

2. The wind turbine blade of claim 1, wherein, The first layout area and the second layout area are arranged along the direction from the leading edge to the trailing edge of the fan blade.

3. The wind turbine blade of claim 2, wherein, The first layout area is arranged on one side of the leading edge of the fan blade, and the second layout area is arranged on one side of the trailing edge of the fan blade.

4. The wind turbine blade of claim 3, wherein, The concave unit is configured as a polygon, and a plurality of the concave units are arranged at intervals along the direction from the tip to the root of the fan blade.

5. The wind turbine blade of claim 4, wherein, The concave unit comprises a first concave unit arranged adjacent to the tip, the first concave unit is configured as a triangle, and the first concave unit comprises a first bottom edge contour line formed by offsetting from the tip curve.

6. The wind turbine blade of claim 5, wherein, The offset distance of the first bottom edge contour line relative to the tip curve is 10-16mm.

7. The wind turbine blade of claim 5, wherein, The length of the first bottom edge contour line is 60-70mm.

8. The wind turbine blade of claim 5, wherein, The concave unit further comprises a second concave unit arranged adjacent to the root, the second concave unit is configured as a triangle, and the second concave unit comprises a second bottom edge contour line formed by offsetting from the root curve.

9. The wind turbine blade of claim 8, wherein, The offset distance of the second bottom edge contour line relative to the root curve is 110-130mm.

10. The wind turbine blade of claim 9, wherein, The length of the second bottom edge contour is 45-55mm.

11. The wind turbine blade of claim 4, wherein, The concave unit is configured as a triangle, and the maximum distance between one of the two waist line contours of the concave unit closer to the leading edge curve and the leading edge curve is 5-10mm; and / or the maximum distance between one of the two waist line contours of the concave unit farther from the leading edge curve and the leading edge curve is 20-30mm.

12. The wind turbine blade of claim 4, wherein, The concave depth of the concave unit is 1-1.5mm.

13. The wind turbine blade according to any of claims 1 to 12, wherein The convex unit is configured as a triangular pyramid.

14. The wind turbine blade of claim 13, wherein, The length of the bottom edge of the convex unit is 11-15mm, and / or the height of the convex unit is 0.5-1mm.

15. The wind turbine blade according to any of claims 1 to 12, wherein The plurality of convex units are uniformly distributed, and the spacing between the bottom edges of two adjacent convex units is 15-25mm.

16. The wind turbine blade according to any of claims 1 to 12, wherein The distribution density of the plurality of convex units at the tip position is greater than the distribution density at the root position.

17. The wind turbine blade of claim 3, wherein, The distance between one of the plurality of convex units closest to the trailing edge curve and the trailing edge curve is 12-22mm.

18. The wind turbine blade of claim 3, wherein, The second layout area accounts for 3 / 4 of the entire area of the fan blade.

19. The wind turbine blade of claim 1, wherein, The first layout area and the second layout area are arranged along the direction from the tip to the root of the fan blade.

20. The wind turbine blade of claim 19, wherein, The first layout area is arranged on one side of the tip of the fan blade, and the second layout area is arranged on one side of the root of the fan blade.

21. A wind wheel, characterized by The wind wheel comprises a hub and a plurality of fan blades circumferentially spaced on the outer peripheral wall of the hub, and the fan blade is the fan blade according to any one of claims 1-20.

22. The wind turbine of claim 21, wherein, The inside of the hub is circumferentially spaced with a plurality of reinforcing ribs, the reinforcing rib extends from the trailing edge of the previous fan blade to the leading edge of the next fan blade, and the reinforcing rib is provided with a notch, and the notch is transitioned with the hub arc.

23. A fan, comprising: The wind wheel comprises the fan blade according to claim 21 or 22.

24. An air conditioner outdoor unit, characterized by comprising: The fan of claim 23 is included.

25. An air conditioner characterized by comprising: The air conditioner outdoor unit of claim 24 is included.

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