Axial flow wind wheel, axial flow fan and air supply equipment
By introducing the leading edge depression section and the trailing edge bump section into the axial flow wheel design, the airflow distribution is optimized, and the flow separation problem of the traditional axial flow wheel during high-speed rotation is solved, achieving the effect of reducing noise and improving efficiency.
Patent Information
- Application Number
- CN202422243422.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-12
AI Technical Summary
Traditional axial flow wind wheels produce flow separation when rotating at high speed, affecting the fan efficiency and generating large noise, and cannot meet the requirements of modern air conditioning systems for high efficiency and low noise.
Design the leading edge depression and tail edge convex section of the axial flow wheel to optimize the airflow distribution, reduce turbulence and vortex, and improve the work efficiency at the leaves roots.
By optimizing the airflow distribution, reducing turbulence and eddy currents, reducing noise, improving wind wheel efficiency and functional capabilities, it meets the energy efficiency and noise requirements of modern air conditioning systems.
Smart Images
Figure CN223152365U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind wheels, in particular to an axial flow wind wheel, an axial flow fan and a air supply device. Background Art
[0002] At present, axial flow fan technology has been widely used in household appliances. The noise of the fan in a household air conditioner is the most important design index. When the wind wheel rotates at a high speed, flow separation will occur, affecting the fan efficiency and the fan noise. When the axial flow wind wheel of a traditional axial flow fan rotates at a high speed, flow separation will occur, affecting the fan efficiency and generating a large amount of fan noise. However, in the air conditioning system, the requirements for the efficiency and noise of the wind wheel are getting higher and higher. The traditional axial flow wind wheel can no longer meet the latest air conditioning energy efficiency and noise requirements. There is an urgent need for an axial flow wind wheel with high efficiency and low noise to adapt to the new air conditioning system. Summary of the Utility Model
[0003] The main purpose of the utility model is to provide an axial flow wind wheel, an axial flow fan and a air supply device, aiming to reduce turbulence, lower noise and improve the work efficiency at the blade root.
[0004] To achieve the above object, an axial flow wind wheel provided by the utility model includes:
[0005] A hub; and
[0006] Blades connected to the hub, the blades having a blade root connected to the hub, a blade tip opposite to the blade root, and a leading edge and a trailing edge respectively provided at both ends of the blade tip;
[0007] On the projection plane perpendicular to the axis of the hub, define the intersection point of the blade tip and the leading edge as the blade tip leading edge point C, the intersection point of the blade tip and the trailing edge as the blade tip trailing edge point D, the intersection point of the blade root and the leading edge as the blade root leading edge point E, the intersection point of the blade root and the trailing edge as the blade root trailing edge point F. The line segment connecting the blade tip leading edge point C and the blade root leading edge point E is the first line segment CE, and the line segment connecting the blade tip trailing edge point D and the blade root trailing edge point F is the second line segment DF. The leading edge has a leading edge concave section recessed toward the side close to the trailing edge relative to the first line segment CE, and the trailing edge has a trailing edge convex section protruding toward the side away from the leading edge relative to the second line segment DF. The straight-line distance between the most convex point A of the trailing edge convex section and the center point of the hub is R1, and the straight-line distance between the most concave point B of the leading edge concave section and the center point O of the hub is R2. Wherein, R1 is less than R2.
[0008] In an embodiment, on the projection plane perpendicular to the axis of the hub, define the radius of the axial flow wind wheel as R, and the radius of the hub as r, wherein, R2 is less than [r + (R - r) / 2].
[0009] In an embodiment, on a projection plane perpendicular to the hub axis, both ends of the leading-edge recessed section coincide with the root leading-edge point E and the tip leading-edge point C respectively.
[0010] In an embodiment, on a projection plane perpendicular to the hub axis, both ends of the trailing-edge protruding section coincide with the root trailing-edge point F and the tip trailing-edge point D respectively.
[0011] In an embodiment, the leading-edge recessed section is in an arc shape, a V shape or a broken-line shape.
[0012] In an embodiment, the trailing-edge protruding section is in an arc shape, a V shape or a broken-line shape.
[0013] In an embodiment, a tip portion is provided at the intersection of the tip and the leading edge, and the tip portion has a tip provided at an acute angle.
[0014] The present utility model further provides an axial flow fan, which includes a motor and the axial flow impeller as described above. The motor is drivingly connected to the axial flow impeller, and the motor is used to drive the axial flow impeller to rotate.
[0015] The present utility model further provides an air supply device, which includes the axial flow impeller or the axial flow fan as described above.
[0016] In an embodiment, the air supply device is an air conditioner, and the axial flow impeller is arranged in the outdoor unit and / or the indoor unit of the air conditioner.
[0017] In the technical solution of the present utility model, an axial flow fan is disclosed by providing a leading edge concave section and a trailing edge convex section. Among them, the leading edge has a leading edge concave section that is concave toward the side close to the trailing edge relative to the first line segment CE, and the trailing edge has a trailing edge convex section that is convex toward the side away from the leading edge relative to the second line segment DF. When the air flow reaches the trailing edge of the blade, if the trailing edge is straight, then the air flow may suddenly separate and form vortices. Therefore, the trailing edge convex section helps to smooth the air flow, reduce the turbulence and vortices in the wake, further reduce the resistance, helps to reduce the formation of trailing vortices, thereby reducing energy loss, especially at the blade root position. When the air flows through the concave leading edge, by making the leading edge concave, the air can flow along the blade surface faster, and then reduce the separation of the air flow at the blade root, thereby improving the aerodynamic efficiency in this area. The design of the trailing edge convex section and the leading edge concave section helps to adjust the air flow distribution on the blade surface, make the air flow more uniform, and reduce the local air flow separation phenomenon. Thereby changing the flow characteristics of the air flow on the blade surface, the overall efficiency of the axial flow rotor can be improved. Since R1 is less than R2, this means that the most convex point A of the trailing edge convex section is closer to the center of the hub than the most concave point B of the leading edge concave section. The result of such a design is that the trailing edge convex section can more effectively guide the air flow, reduce the turbulence and vortices of the air flow at the trailing edge, thereby reducing the resistance. This helps to increase the effective working area at the blade root, enabling more air flow to generate thrust at the blade root, thereby potentially increasing the work done at the blade root. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0019] Figure 1 FIG. is a schematic structural diagram of an embodiment of an axial flow rotor provided by the present utility model;
[0020] Figure 2 FIG. is a schematic structural diagram of another embodiment of an axial flow rotor provided by the present utility model;
[0021] Figure 3 FIG. is a schematic structural diagram of an embodiment of an outdoor unit of an air conditioner provided by the present utility model.
[0022] Description of the reference numerals in the drawings:
[0023] 100, axial flow rotor; 200, motor; 300, heat exchanger; 400, air outlet panel; 500, mesh cover;
[0024] 10. Hub; 20. Blade; 21. Blade root; 22. Blade tip; 23. Leading edge; 24. Trailing edge; 25. Leading edge depression section; 26. Trailing edge convex section; 27. Blade tip part; O. Center point; A. Most convex point; B. Most concave point; C. Leading edge point of blade tip; D. Trailing edge point of blade tip; E. Leading edge point of blade root; F. Trailing edge point of blade root; CE. First line segment; DF. Second line segment.
[0025] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners
[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0029] The present utility model provides an axial flow wind wheel, an axial flow fan and a air supply device.
[0030] Axial fans are widely used in household electrical appliances. For example, most of the outdoor units of household air conditioners adopt axial fans. When the axial impeller of a traditional axial fan rotates at a high speed, flow separation will occur, which affects the fan efficiency and generates relatively large fan noise. Moreover, in air conditioning systems, the requirements for the efficiency and noise of the impeller are getting higher and higher. The traditional axial impeller can no longer meet the latest air conditioning energy efficiency and noise requirements. There is an urgent need for a high-efficiency and low-noise axial impeller to adapt to the new air conditioning system.
[0031] The present utility model provides an axial impeller 100. By optimizing the structure of the axial impeller 100, the work area is increased, eddy currents can be reduced, and the airflow can flow more smoothly over the surface of the blade 20, thereby reducing the occurrence of airflow separation and reducing the noise during operation.
[0032] The axial impeller 100 or the axial fan having the axial impeller 100 can also be applied to air supply equipment. Among them, the air supply equipment includes, but is not limited to, air conditioners, fans, air purifiers, dehumidifiers, humidifiers, etc. When the air supply equipment is an air conditioner, the axial impeller 100 can be arranged in the outdoor unit and / or the indoor unit of the air conditioner.
[0033] Taking the application of the axial impeller 100 in the outdoor unit of an air conditioner as an example, as Figure 3 shown, in an embodiment, the outdoor unit of the air conditioner includes a housing, and an axial impeller 100, a motor 200, and a heat exchanger 300 arranged in the housing. The housing has an air inlet and an air outlet. The heat exchanger 300 is arranged opposite to the air inlet, and the axial impeller 100 is arranged between the heat exchanger 300 and the air outlet. The axial impeller 100 is drivingly connected to the motor 200. When the outdoor unit of the air conditioner works, the motor 200 drives the axial impeller 100 to rotate, and can suck external air into the housing through the air inlet, exchange heat with the heat exchanger 300, and then send it out from the air outlet. Optionally, the housing has an air outlet panel 400 located on the front side. The air outlet panel 400 is provided with an air outlet, and a mesh cover 500 is arranged at the air outlet to prevent foreign objects from entering the interior of the outdoor unit of the air conditioner. By adopting the axial impeller 100 of the present utility model, the noise and power of the outdoor unit of the air conditioner can be reduced under the condition of achieving the same air volume, so that it can meet the latest air conditioning energy efficiency and noise requirements. The following mainly takes the implementation manner of the axial impeller 100 as an example for illustration.
[0034] Referring to Figures 1 to 2 In the embodiment of the present utility model, an axial impeller 100 includes:
[0035] a hub 10; and
[0036] blades 20 connected to the hub 10. The blades 20 have a blade root 21 connected to the hub 10, a blade tip 22 opposite to the blade root 21, and a leading edge 23 and a trailing edge 24 respectively arranged at both ends of the blade tip 22;
[0037] On the projection plane perpendicular to the axis of the hub 10, define the intersection point of the blade tip 22 and the leading edge 23 as the blade tip leading edge point C, the intersection point of the blade tip 22 and the trailing edge 24 as the blade tip trailing edge point D, the intersection point of the blade root 21 and the leading edge 23 as the blade root leading edge point E, and the intersection point of the blade root 21 and the trailing edge 23 as the blade root trailing edge point F. The line segment connecting the blade tip leading edge point C and the blade root leading edge point E is the first line segment CE, and the line segment connecting the blade tip trailing edge point D and the blade root trailing edge point F is the second line segment DF. The leading edge 23 has a leading edge concave section 25 that is concave toward the side close to the trailing edge 24 relative to the first line segment CE, and the trailing edge 24 has a trailing edge convex section 26 that is convex toward the side away from the leading edge 23 relative to the second line segment DF. The straight-line distance between the most convex point A of the trailing edge convex section 26 and the center point of the hub 10 is R1, and the straight-line distance between the most concave point B of the leading edge concave section 25 and the center point O of the hub 10 is R2. Among them, R1 is less than R2.
[0038] It can be understood that the axial flow wind wheel 100 includes a hub 10 and blades 20 provided on the outer periphery of the hub 10. Among them, the number of blades 20 is generally at least two, for example, it can be two, three, four, five or more. Optionally, the number of blades 20 is not less than two and not more than five. Exemplarily, three blades 20 are circumferentially spaced and evenly arranged on the hub 10, and the shapes and thicknesses of the respective blades 20 are substantially the same to ensure the stability of the axial flow wind wheel 100 during rotation. Taking a single blade 20 as an example, the blade root 21, the leading edge 23, the blade tip 22, and the trailing edge 24 of the blade 20 are sequentially connected end to end to enclose the outer peripheral contour of the blade 20. Among them, the blade root 21 is used to connect the hub 10, and the blade tip 22 is located on the side of the blade root 21 away from the hub 10 to form the free end of the blade 20. In the oncoming flow direction, the leading edge 23 is located on the upstream side of the blade 20, and the trailing edge 24 is located on the downstream side of the blade 20. The axial flow wind wheel 100 is driven to rotate by a motor 200, and the air flow flows into the blade 20 from the leading edge 23, and after obtaining a pressure rise by the work of the blade 20, it flows out from the trailing edge 24 of the blade 20, thereby realizing the air supply function. Among them, as Figure 3 shown, the projection plane parallel to the axis of the hub 10 means the projection plane formed by the projection of the axial flow wind wheel 100 on a plane parallel to the axis of the hub 10; as Figure 3 shown, the projection plane perpendicular to the axis of the hub 10 means the projection plane formed by the projection of the axial flow wind wheel 100 on a plane perpendicular to the axis of the hub 10.
[0039] In this utility model, the hub 10 is the central part of the axial flow wind wheel 100, which is used to fix the blades 20 and drive the blades 20 to rotate. The leading edge concave section 25 is a part on the leading edge 23 that is recessed towards the trailing edge 24 relative to the first line segment CE from the blade root 21 to the blade tip 22. The trailing edge convex section 26 is a part on the trailing edge 24 that protrudes outward relative to the second line segment DF from the blade root 21 to the blade tip 22. When the airflow reaches the trailing edge 24 of the blade, if the trailing edge 24 is straight, the airflow may suddenly separate and form eddies. The convex trailing edge 24 design can extend the path of the airflow on the blade 20, enabling the airflow to transition more smoothly into the space outside the trailing edge 20, reducing the formation of turbulence. Therefore, the trailing edge convex section 26 helps to smooth the airflow, reduce the turbulence and eddies in the wake, further reduce the resistance, contribute to reducing the formation of trailing vortices, thereby reducing energy loss, especially at the blade root position. The design of the trailing edge convex section 26 and the leading edge concave section 25 helps to adjust the airflow distribution on the surface of the blade 20, making the airflow more uniform and reducing local airflow separation phenomena. Thereby changing the flow characteristics of the airflow on the surface of the blade 20 can improve the overall efficiency of the axial flow wind wheel 100. Since R1 is less than R2, this means that the most convex point A of the trailing edge convex section 26 is closer to the center of the hub 10 than the most concave point B of the leading edge concave section 25. The result of this design is that the trailing edge convex section 26 can more effectively guide the airflow, reduce the turbulence and eddies of the airflow at the trailing edge 24, thereby reducing the resistance. This helps to increase the effective working area at the blade root 21, enabling more airflow to generate thrust at the blade root 21, thereby potentially increasing the work done at the blade root 21. This design helps to generate a smoother airflow distribution on the surface of the blade 20, reduce the possibility of airflow separation, and thus improve the aerodynamic efficiency.
[0040] Referring to Figures 1 to 2 , in the embodiment of this utility model, on the projection plane perpendicular to the axis of the hub 10, the radius of the axial flow wind wheel 100 is defined as R, and the radius of the hub 10 is defined as r, where R2 is less than [r + (R - r) / 2].
[0041] R2 < [r + (R - r) / 2] describes the relationship between the straight-line distance R2 between the most concave point B of the leading edge concave section 25 of the blade of the axial flow wind wheel 100 and the center point O of the hub 10, the radius r of the hub 10, and the radius R of the axial flow wind wheel 100. By making R2 less than [r + (R - r) / 2], the position of the most concave point B is designed to be closer to the center point O of the hub, which helps to reduce the formation of the airflow at the leading edge 23 of the blade, thereby reducing the frictional resistance, reducing the possibility of airflow separation, and further reducing the resistance. A smaller R2 value helps to reduce the frictional resistance of the airflow at the leading edge 23, thereby reducing the overall resistance. Reducing the separation and turbulence of the airflow at the leading edge 23 optimizes the airflow distribution and reduces the noise.
[0042] Referring toFigures 1 to 2 , in the embodiment of the present utility model, on the projection plane perpendicular to the axis of the hub 10, both ends of the leading edge recessed section 25 coincide with the root leading edge point E and the tip leading edge point C respectively.
[0043] By making both ends of the leading edge recessed section 25 coincide with the root leading edge point E and the tip leading edge point C, it can ensure that the airflow is smoother when entering the blade 20, reducing the separation of the airflow at the leading edge 23. Reducing airflow separation helps to reduce frictional resistance and improve the efficiency of the axial flow wind turbine 100. By ensuring that the leading edge recessed section 25 remains consistent throughout the length of the blade 20, the flow characteristics of the airflow can be better controlled and the resistance can be reduced.
[0044] Refer to Figures 1 to 2 , in the embodiment of the present utility model, on the projection plane perpendicular to the axis of the hub 10, both ends of the trailing edge raised section 26 coincide with the root trailing edge point F and the tip trailing edge point D respectively.
[0045] By making both ends of the trailing edge raised section 26 coincide with the root trailing edge point F and the tip trailing edge point D. The coincident design helps to ensure a smooth transition of the airflow throughout the length of the blade 20, and can ensure that the airflow is smoother when leaving the blade, reducing the turbulence and eddy currents in the wake, thereby improving the aerodynamic efficiency. By ensuring that the trailing edge raised section 26 remains consistent throughout the length of the blade 20, the flow characteristics of the airflow can be better controlled and the resistance can be reduced.
[0046] Refer to Figures 1 to 2 , in the embodiment of the present utility model, the leading edge recessed section 25 is in a circular arc shape, a V shape or a broken line shape.
[0047] By adopting a circular arc shape, a V shape or a broken line shape design, the flow of the airflow at the leading edge can be better controlled, reducing the formation of airflow separation and turbulence, thereby improving the efficiency of the axial flow wind turbine 100. The circular arc shape provides the best way for the smooth transition of the airflow, helping to reduce the sudden change of the airflow at the leading edge. The circular arc shape can reduce airflow separation, thereby reducing frictional resistance. The circular arc shape helps to improve the airflow attachment ability, reducing the formation of turbulence and eddy currents, thereby improving the efficiency of the axial flow wind turbine 100. The V shape design helps to quickly guide the airflow, making it flow closer to the surface of the blade 20 faster. The V shape can reduce the separation of the airflow at the leading edge 23, helping to reduce the resistance. The V shape helps to optimize the distribution of the airflow on the blade 20, reducing the formation of turbulence and eddy currents and improving the aerodynamic performance. The broken line shape design can be optimized according to different working conditions and is suitable for specific airflow characteristics. The broken line shape design can improve the stability of the airflow through multiple turning points, reducing airflow separation. By controlling the flow direction of the airflow, the broken line shape design helps to reduce the generation of aerodynamic noise.
[0048] Refer to Figures 1 to 2, in the embodiment of the present utility model, the trailing edge protruding section 26 is arc-shaped, V-shaped or zigzag-shaped.
[0049] By adopting an arc-shaped, V-shaped or zigzag-shaped design, the flow of the air flow at the leading edge 23 can be better controlled, the formation of air flow separation and turbulence can be reduced, thereby improving the efficiency of the axial flow wind wheel 100. The arc shape provides the best way for the smooth transition of the air flow, which helps to reduce the sudden change of the air flow at the leading edge 23. The arc shape can reduce the air flow separation, thereby reducing the frictional resistance. The arc shape helps to improve the air flow attachment ability, reduce the formation of turbulence and eddy currents, thereby improving the efficiency of the axial flow wind wheel 100. The V-shaped design helps to quickly guide the air flow, making it flow closer to the surface of the blade 20 faster. The V shape can reduce the separation of the air flow at the leading edge 23, which helps to reduce the resistance. The V shape helps to optimize the distribution of the air flow on the blade 20, reduce the formation of turbulence and eddy currents, and improve the aerodynamic performance. The zigzag-shaped design can be optimized according to different working conditions and is suitable for specific air flow characteristics. The zigzag-shaped design can improve the stability of the air flow through multiple turning points and reduce the air flow separation. By controlling the flow direction of the air flow, the zigzag-shaped design helps to reduce the generation of aerodynamic noise.
[0050] Refer to Figures 1 to 2 , in the embodiment of the present utility model, a tip portion 27 is provided at the intersection of the blade tip 22 and the leading edge 23, and the tip portion 27 has a tip provided at an acute angle.
[0051] The acute angle design of the tip portion 27 helps to reduce the eddy currents at the end of the blade 20. When the blade 20 rotates, eddy currents will be generated at the end of the blade 20, and these eddy currents will cause additional resistance and noise. The acute angle design can reduce the generation of eddy currents, thereby reducing the resistance and noise levels. The acute angle design helps to optimize the angle between the leading edge 23 of the blade and the wind direction, that is, the angle of attack. When the angle of attack approaches the optimal value, the blade 20 can obtain the maximum thrust with the minimum resistance, thereby improving the overall efficiency of the axial flow wind wheel 100. The acute angle design can reduce the stress concentration at the end of the blade 20, which helps to improve the durability of the blade 20 and the stability of the overall structure. By reducing the stress at the end of the blade 20, the service life of the blade 20 can be extended. Therefore, designing the tip portion 27 to be acute can significantly improve the overall performance of the axial flow wind wheel 100, including efficiency, noise level, stability and adaptability.
[0052] Refer to Figures 1 to 3, in the embodiments of the present utility model, the present utility model also provides an axial flow fan, which includes an axial flow impeller 100 and a motor 200. The motor 200 is drivingly connected to the axial flow impeller 100, and the motor 200 is used to drive the axial flow impeller 100 to rotate. The specific structure of the axial flow impeller 100 refers to the above embodiments. Since this axial flow fan adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0053] In this embodiment, the output shaft of the motor 200 is drivingly connected to the hub 10 of the axial flow impeller 100. By driving the axial flow impeller 100 to rotate with the motor 200, air flows into from the leading edge 23 of the blade 20, and after obtaining pressure rise by the work done by the blade 20, it flows out from the trailing edge 24 of the blade 20, thereby realizing the air supply function. And through the above design of the axial flow impeller 100, the fan efficiency can be improved, and the power and noise can be reduced under the condition of achieving the same air volume.
[0054] The present utility model also provides an air supply device, which includes an axial flow impeller 100 or an axial flow fan having an axial flow impeller 100. The specific structure of the axial flow impeller 100 refers to the above embodiments. Since this air supply device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the air supply device includes but is not limited to air conditioners, fans, air purifiers, dehumidifiers, humidifiers, etc.
[0055] Refer to Figures 1 to 3 , the present utility model also provides an air conditioner, which includes the above-mentioned axial flow impeller 100, and the axial flow impeller 100 is arranged in the outdoor unit and / or indoor unit of the air conditioner. The specific structure of the axial flow impeller 100 refers to the above embodiments. Since the axial flow impeller 100 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0056] The above is only an exemplary embodiment of the present utility model, and it does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. An axial flow wind wheel, characterized in that, Comprising: a hub; and blades, connected to the hub, the blades having a blade root connected to the hub, a blade tip opposite to the blade root, and a leading edge and a trailing edge respectively disposed at both ends of the blade tip; On a projection plane perpendicular to the axis of the hub, define the intersection point of the blade tip and the leading edge as the blade tip leading edge point, the intersection point of the blade tip and the trailing edge as the blade tip trailing edge point, the intersection point of the blade root and the leading edge as the blade root leading edge point, the intersection point of the blade root and the trailing edge as the blade root trailing edge point, the line segment connecting the blade tip leading edge point and the blade root leading edge point as the first line segment, and the line segment connecting the blade tip trailing edge point and the blade root trailing edge point as the second line segment; the leading edge has a leading edge concave section recessed toward the side close to the trailing edge relative to the first line segment, the trailing edge has a trailing edge convex section protruding toward the side away from the leading edge relative to the second line segment, the straight-line distance between the most convex point of the trailing edge convex section and the center point of the hub is R1, and the straight-line distance between the most concave point of the leading edge concave section and the center point of the hub is R2; wherein, R1 is less than R2.
2. The axial flow wind wheel according to claim 1, characterized in that On a projection plane perpendicular to the axis of the hub, define the radius of the axial flow wind wheel as R and the radius of the hub as r, wherein, R2 is less than [r + (R - r) / 2].
3. The axial flow wind wheel according to claim 1, characterized in that, On a projection plane perpendicular to the axis of the hub, both ends of the leading edge concave section coincide with the blade root leading edge point and the blade tip leading edge point respectively.
4. The axial flow wind wheel according to claim 1, characterized in that, On a projection plane perpendicular to the axis of the hub, both ends of the trailing edge convex section coincide with the blade root trailing edge point and the blade tip trailing edge point respectively.
5. The axial flow wind wheel according to claim 1, characterized in that, The leading edge concave section is arc-shaped, V-shaped or zigzag-shaped.
6. The axial flow wind wheel according to claim 1, characterized in that, The trailing edge convex section is arc-shaped, V-shaped or zigzag-shaped.
7. The axial flow wind wheel according to any one of claims 1 to 6, characterized in that, A blade tip part is provided at the intersection of the blade tip and the leading edge, and the blade tip part has a tip disposed at an acute angle.
8. An axial flow fan, characterized in that, Comprising a motor and an axial flow wind wheel according to any one of claims 1 to 7, the motor is drivingly connected to the axial flow wind wheel, and the motor is used to drive the axial flow wind wheel to rotate.
9. An air supply device, characterized in that, Comprising an axial flow wind wheel according to any one of claims 1 to 7, or comprising an axial flow fan according to claim 8.
10. The air supply device according to claim 9, characterized in that, The air supply device is an air conditioner, and the axial flow wind wheel is disposed in the air conditioner outdoor unit and / or the air conditioner indoor unit of the air conditioner.