CN220505393U - Axial flow wind wheel, air conditioner external unit and air conditioner - Google Patents
Axial flow wind wheel, air conditioner external unit and air conditioner Download PDFInfo
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- CN220505393U CN220505393U CN202321513634.8U CN202321513634U CN220505393U CN 220505393 U CN220505393 U CN 220505393U CN 202321513634 U CN202321513634 U CN 202321513634U CN 220505393 U CN220505393 U CN 220505393U
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Abstract
The application discloses an axial-flow wind wheel, an air conditioner external unit and an air conditioner, wherein the axial-flow wind wheel comprises a wheel hub and a plurality of blades, the blades are distributed at intervals in the circumferential direction of the wheel hub, and the blades comprise a body part and a front edge part which are connected with each other; wherein, at least part of the structure of leading edge portion is relative the body portion towards the pressure face side of blade deflects in order to form the rotor portion, and the axial flow wind wheel of this application has less noise in rotatory in-process.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an axial flow wind wheel, an air conditioner external unit and an air conditioner.
Background
In the related technical field, the axial flow wind wheel is widely applied to air conditioners and various ventilation and heat dissipation environments due to large air quantity, low noise and low pressure, the design of the axial flow wind wheel has great influence on the efficiency and noise of a fan, and the requirements on the efficiency of the fan for heat dissipation are higher along with the improvement of the national energy efficiency of the air conditioner, and the noise of the axial flow wind wheel is low and the efficiency is high. In order to reduce the weight of the axial flow wind wheel and reduce the load of a fan, the design of the existing axial flow wind wheel designs the blades into single circular arcs with equal thickness, so that the weight of the axial flow wind wheel is reduced, the load of a motor is reduced, and the noise of the fan is increased.
Disclosure of Invention
The embodiment of the application provides an axial-flow wind wheel, an air conditioner external unit and an air conditioner, which have smaller noise when rotating.
In a first aspect, embodiments of the present application provide an axial flow wind turbine, including a hub and a plurality of blades spaced apart in a circumferential direction of the hub, the blades including a body portion and a leading edge portion connected; wherein at least part of the structure of the leading edge portion is deflected with respect to the body portion toward the pressure face side of the blade to form a deflected rotor portion.
According to the axial flow wind wheel disclosed by the embodiment of the application, the part of the front edge part deflects towards the pressure surface of the blade to form the deflection part, so that the part of the blade with the deflection part has a smaller attack angle, the smaller the attack angle of the blade is, the slower the acceleration process of the airflow on the suction surface is, the speed maximum point of the airflow on the suction surface moves backwards along the direction from the front edge to the rear edge of the section of the blade with the deflection part, the flow separation point also moves backwards, the backflow area (the noise generated by the turbulence of the airflow in the backflow area) generated by the separated airflow is reduced, the noise is further reduced, and particularly for the unstable air inlet working condition, the part of the blade with the deflection part has a smaller attack angle, so that the axial flow wind wheel can bear the airflow with a faster flow speed to stall, and the excessive noise generated by the flow separation when the airflow stall is excessively strong due to the air inlet has a good control effect.
In some embodiments of the present application, the deflection angle of the deflection sub-portion with respect to the body portion is 3 ° or more and 45 ° or less.
Based on the embodiment, in the range, the deflection part can well reduce noise generated by flow separation, and can ensure that the attack angle of the deflection part is not too small so as to reduce the exhaust efficiency of the axial flow wind wheel.
In some embodiments of the present application, the deflection angle of the deflection sub-portion with respect to the body portion is 5 ° or more and 30 ° or less.
Based on the embodiment, the deflection angle of the deflection rotor part relative to the body part is further reduced, so that the blades can well reduce noise generated by flow separation, and the attack angle of the blades can be ensured not to be too small so as to reduce the exhaust efficiency of the axial flow wind wheel.
In some embodiments of the present application, in a projection along an axial direction of the hub, a ratio of a contour length of the deflector portion to a contour length of the leading edge portion is 0.35 or more and 1 or less.
Based on the above embodiment, in this range, the part of the blade having the deflection part has a smaller attack angle, so that noise generated in the rotation process of the blade can be reduced, and the rest part of the blade has a larger attack angle, so that the axial flow wind wheel can be ensured to have good exhaust efficiency.
In some embodiments of the present application, a ratio of a contour length of the deflector portion to a contour length of the leading edge portion is 0.5 or more and 0.8 or less.
Based on the embodiment, the part of the deflection part occupying the front edge part is further reduced, and on the premise that the front edge part has enough deflection parts to reduce noise generated in the rotation process of the blade, the part of the front edge part except the deflection parts, which has a larger attack angle, is further increased, so that the axial flow wind wheel is ensured to have good exhaust efficiency.
In some embodiments of the present application, the deflector portion includes a proximal end near the hub and a distal end remote from the hub, and in a projection along an axial direction of the hub, a ratio of a contour length between the distal end and a blade root of the blade to a contour length of the leading edge portion is equal to or less than 0.85, and the proximal end is located on the blade root of the blade or the proximal end is spaced apart from the blade root of the blade.
Based on the above embodiment, the proximal end of the deflector portion is located on the blade root of the blade, the ratio of the length of the contour line between the distal end and the blade root to the length of the contour line of the leading edge portion is less than or equal to 0.85, at this time, the leading edge portion is deflected from the blade root of the blade to 85% of the total contour line of the leading edge portion at most, at this time, the blade root of the blade must have a deflector portion, and the deflector portion can increase the structural strength of the blade due to the greater stress borne by the blade at the blade root, so that the blade can bear greater stress, and the deflector portion is disposed at the blade root so as to facilitate the provision of reinforcing ribs between the blade and the hub to enhance the connection strength between the blade and the hub.
In addition, a distance exists between the proximal end of the deflection sub-part and the blade root of the blade, the ratio of the length of the contour line between the distal end and the blade root to the length of the contour line of the front edge part is less than or equal to 0.85, at the moment, the front edge part starts to deflect to 85% of the total contour line of the front edge part at most after a certain distance from the blade root of the blade, at the moment, the deflection sub-part is mainly concentrated at the middle part of the blade, and the deflection sub-part is arranged at the middle part of the blade because the middle part of the blade has good pneumatic performance compared with the blade root and the blade tip, so that the deflection sub-part has better noise reduction effect and further reduces noise generated by the axial flow wind wheel.
In some embodiments of the present application, the blade is cut circumferentially along the hub and passes through a section formed by the deflector portion, and a ratio of a chord length of the deflector portion to an overall chord length of the section is 0.05 or more and 0.25 or less.
Based on the embodiment, in the range, on the premise that the deflection sub-part can reduce noise generated in the rotating process of the axial flow wind wheel, the integral wing profile design of the blade is not influenced after the front edge part deflects to form the deflection sub-part, and the blade is ensured to still have good aerodynamic performance.
In some embodiments of the present application, the leading edge portion further includes a rounded transition sub-portion connected with and disposed between the deflector sub-portion and the body portion.
Based on the embodiment, the deflection sub-part forms an arc transition sub-part to transition the front edge part to the deflection sub-part or transition the deflection sub-part to the front edge part, so that the smoothness and the attractiveness of the blade are ensured.
In a second aspect, an embodiment of the present application provides an air conditioner external unit, where the air conditioner external unit includes an axial flow wind wheel as described above.
Based on the air conditioner external unit in the embodiment of the application, due to the adoption of the axial flow wind wheel, noise generated in the running process of the air conditioner external unit can be reduced through the axial flow wind wheel, and the deflection sub-part of the axial flow wind wheel has a smaller attack angle, so that the axial flow wind wheel is more difficult to stall, and the reliability of the air conditioner external unit is improved.
In a third aspect, embodiments of the present application provide an air conditioner, including an axial flow wind wheel as described above; or, the air conditioner outdoor unit as described above.
Based on the air conditioner in the embodiment of the application, due to the adoption of the axial flow wind wheel, noise generated in the running process of the air conditioner can be reduced through the axial flow wind wheel, and the deflection sub-part of the axial flow wind wheel has a smaller attack angle, so that the axial flow wind wheel is more difficult to stall, and the reliability of the air conditioner is improved.
According to the axial flow wind wheel, the air conditioner external unit and the air conditioner, the part of the front edge part deflects towards the pressure surface of the blade to form the deflection part, so that the part of the blade with the deflection part has smaller attack angle, the smaller attack angle of the blade is, the slower the acceleration process of the airflow on the suction surface is, the maximum speed point of the airflow on the suction surface moves backwards along the direction from the front edge to the rear edge of the wing profile of the blade, the flow separation point also moves backwards, the backflow area (noise generated by disturbance of the airflow in the backflow area) generated by the separated airflow is reduced, the noise is further reduced, and particularly under the unstable air inlet working condition, if the air inlet is too strong, the oversized noise generated by flow separation when the axial flow wind wheel stalls has good control effect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of an axial flow wind turbine according to an embodiment of the present disclosure;
FIG. 2 is a front view of the axial flow wind turbine shown in FIG. 1;
FIG. 3 is a cross-sectional view of any of the blades taken along section A-A;
FIG. 4 is a schematic diagram of the flow of air creating turbulence on the suction side of the cross-sectional view depicted in FIG. 3.
Reference numerals: 10. a hub; 20. a blade; 21. a body portion; 22. a leading edge portion; 221. a deflection body; 222. arc transition sub-parts; a. a deflection angle; b. blade motion vector direction; c. angle of attack; d. total chord length of the cross section; e. a reflow zone; F. the difference between the atmospheric pressure and the reverse pressure gradient drop; g. airfoil suction side airflow.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In the related technical field, the axial flow wind wheel is widely applied to air conditioners and various ventilation and heat dissipation environments due to large air quantity, low noise and low pressure, the design of the axial flow wind wheel has great influence on the efficiency and noise of a fan, and the requirements on the efficiency of the fan for heat dissipation are higher along with the improvement of the national energy efficiency of the air conditioner, and the noise of the axial flow wind wheel is low and the efficiency is high. In order to reduce the weight of the axial flow wind wheel and reduce the load of a fan, the design of the existing axial flow wind wheel designs the blades into single circular arcs with equal thickness, so that the weight of the axial flow wind wheel is reduced, the load of a motor is reduced, and the noise of the fan is increased.
In order to solve the above technical problems, please refer to fig. 1 to 3, the present application provides an axial flow wind wheel, an air conditioner external unit and an air conditioner, wherein the axial flow wind wheel has smaller noise when rotating.
Referring to fig. 1 to 3, an axial flow wind turbine according to an embodiment of the present application includes a hub 10 and a plurality of blades 20, wherein the plurality of blades 20 are distributed at intervals in a circumferential direction of the hub 10, and the blades 20 include a body portion 21 and a leading edge portion 22 which are connected to each other; wherein at least part of the structure of the leading edge portion 22 is deflected toward the pressure face side of the blade 20 with respect to the body portion 21 to form a deflected rotor portion 221.
The hub 10 is used for connecting the blades 20 and an external driving device, the hub 10 drives the plurality of blades 20 fixed on the periphery of the hub 10 to rotate under the drive of the external driving device, in this embodiment, the shape, structure, material and the like of the hub 10 are not limited, and the hub 10 can be specifically selected according to the working condition of an axial flow wind wheel, for example, the axial flow wind wheel is applied to an axial flow wind wheel or an air conditioner and the like, the hub 10 can be configured into a cylindrical structure with a simple structure, and the material can also be selected from plastics or light alloy and the like.
The blades 20 are important components of the axial flow wind wheel, whether the blades 20 have good high aerodynamic performance determines the working efficiency of the axial flow wind wheel, in the embodiment of the application, the number of the blades 20 is not limited, any number of the blades 20 can realize the exhaust function of the axial flow wind wheel, and it can be understood that the blades 20 are uniformly distributed along the circumferential direction of the hub 10.
Referring to fig. 4, the attack angle c is an angle between the blade motion vector direction b and the total chord length d of the cross section of the blade 20 having the eccentric rotor 221. Flow separation refers to the phenomenon that fluid near the wall surface flows more slowly under the double effects of wall friction and reverse pressure difference force until the fluid stops and flows reversely or transversely, so that the main flow is pushed away from the wall surface. The basic principle of flow separation is that the flow separation occurs because the airflow decelerates after passing the maximum speed point (in this application, the maximum speed of the airflow at the leading edge 22) and a back pressure gradient (the pressure of the airflow flowing through the suction surface of the blade 20 having the cross section of the deflection body 221 gradually decreases) until the back pressure gradient becomes zero (in this case, the pressure of the airflow is equal to the pressure of the atmospheric pressure, which is the flow separation point, and the flow separation point moves toward the trailing edge after the angle of attack c decreases), and the backflow zone e is generated. The back pressure gradient is the direction of expansion of the gas flow along the conduit, with a gradual increase in pressure due to a decrease in flow rate (in this application the difference between the ambient atmospheric pressure and the back pressure gradient is F).
According to the axial flow wind wheel disclosed by the embodiment of the application, the part of the front edge 22 deflects towards the pressure surface of the blade 20 to form the deflection rotor part 221, so that the part of the blade 20 with the deflection rotor part 221 has a smaller attack angle c, the smaller attack angle c of the blade 20 is, the slower the acceleration process of the airflow on the suction surface is, the maximum speed point of the airflow on the suction surface moves backwards along the direction from the front edge to the rear edge of the airfoil of the blade 20, the flow separation point also moves backwards, the backflow area e (the noise generated by the turbulence of the airflow in the backflow area e) generated by the separated airflow is reduced, and further, the noise is reduced, particularly under the unstable air inlet working condition, if the air inlet is too strong, the overlarge noise generated by flow separation when the axial flow wind wheel stalls has a good control effect.
Referring to fig. 1 to 3, in some embodiments of the present application, the deflection angle a of the deflection rotor 221 relative to the main body 21 is greater than or equal to 3 ° and less than or equal to 45 °, in this range, the deflection rotor 221 can well reduce noise generated by flow separation, and the incidence angle c of the deflection rotor 221 can be ensured not to be too small so as to reduce the exhaust efficiency of the axial flow wind wheel. Preferably, the deflection angle a of the deflection sub-portion 221 with respect to the body portion 21 is 5 ° or more and 30 ° or less, for example, 10 °, 15 °, 20 °, 25 °, or the like.
It will be appreciated that the deflection angle a of the deflection sub-portion 221 relative to the body portion 21 may vary throughout the blade root-to-blade tip direction, for example, the deflection angle a of the deflection sub-portion 221 relative to the body portion 21 may be greater in a center position of the blade 20 having the best aerodynamic performance in a radial direction of the hub 10, and smaller in a center position of the blade root or blade tip where the aerodynamic performance is poor, so that deflection of a smaller center portion of the leading edge portion 22 relative to the body portion 21 to form the deflection sub-portion 221 may ensure that the axial flow wind turbine may reduce noise generated and may reduce the amount of machining of the blade 20.
If the working environment of the axial flow wind wheel is unstable in wind speed, the difference between the maximum wind speed and the minimum wind speed is too large, in some embodiments of the present application, the deflection angle a range of the deflection sub-portion 221 relative to the main body portion 21 is larger, for example, the deflection sub-portion 221 deflects 43 ° at one place relative to the main body portion 21 and deflects 7 ° at another place relative to the main body portion 21, so that the axial flow wind wheel can be suitable for various wind speeds. It will be appreciated that the deflection angle a of the deflection sub-section 221 relative to the main body section should be set in response to the prevailing wind speed when the axial flow wind turbine is in operation.
In some embodiments of the present application, in the projection along the axial direction of the hub 10, the ratio of the contour length of the deflector portion 221 to the contour length of the leading edge portion 22 is greater than or equal to 0.35 and less than or equal to 1, and within this range, the portion of the blade 20 having the deflector portion 221 has a smaller angle of attack c, which can reduce noise generated during rotation of the blade 20, and the rest of the blade 20 still has a larger angle of attack c, which can ensure good exhaust efficiency of the axial flow wind wheel, preferably, the ratio of the contour length of the deflector portion 221 to the contour length of the leading edge portion 22 is greater than or equal to 0.5 and less than or equal to 0.8, for example, 0.6, 0.65, 07 or 0.75.
In some embodiments of the present application, the deflector portion 221 includes a proximal end proximal to the hub 10 and a distal end distal to the hub 10; the proximal end is located on the blade root of the blade 20 and the ratio of the contour length between the distal end and the blade root of the blade to the contour length of the leading edge portion 22 in the projection along the axial direction of the hub 10 is equal to or less than 0.85.
Based on the above embodiment, the proximal end of the deflection part 221 is located on the blade root of the blade 20, the ratio of the length of the contour line between the distal end and the blade root to the length of the contour line of the leading edge part 22 is less than or equal to 0.85, at this time, the leading edge part 22 deflects from the blade root of the blade 20 to 85% of the total contour line of the leading edge part 22 at most, at this time, the deflection part 221 must exist at the blade root of the blade 20, so that the reinforcing ribs are conveniently arranged between the blade 20 and the hub 10 to strengthen the connection strength between the blade 20 and the hub 10, and at the same time, the deflection part 221 deflects to 85% of the total contour line of the leading edge part 22 to cover the middle part of the blade 20 with the best aerodynamic performance, thereby ensuring the noise reduction capability of the deflection part 221 on the blade 20.
In other embodiments of the present application, the proximal end is spaced from the blade root of the blade 20 and the ratio of the contour length between the distal end and the blade root to the contour length of the leading edge portion 22 in an axial projection along the hub 10 is less than or equal to 0.85.
Based on the above embodiment, the distance between the proximal end of the deflection sub-portion 221 and the blade root of the blade 20 is present, and the ratio of the length of the contour line between the distal end and the blade root to the length of the contour line of the front edge portion 22 is less than or equal to 0.85, at this time, the front edge portion 22 starts to deflect to at most 85% of the total contour line of the front edge portion 22 after a certain distance from the blade root of the blade 20, at this time, the deflection sub-portion 221 is mainly concentrated in the middle position of the blade 20, and since the middle position of the blade 20 has good aerodynamic performance compared with the blade root and the blade tip, the deflection sub-portion 221 has better noise reduction effect, and noise generated by the axial flow wind wheel is further reduced.
Referring to fig. 3, in some embodiments of the present application, in a section formed by cutting the blade 20 along the circumferential direction of the hub 10 and passing through the deflection portion 221, a ratio of a chord length of the deflection portion 221 to a total chord length d of the section is greater than or equal to 0.05 and less than or equal to 0.25, and in this range, on the premise that the deflection portion 221 is ensured to reduce noise generated in the rotation process of the axial flow wind wheel, the front edge portion 22 is partially deflected to form the deflection portion 221, so that the overall airfoil design of the blade 20 is not affected, and good aerodynamic performance of the blade 20 is ensured.
Referring to fig. 1 or 2, in some embodiments of the present application, the front edge 22 further includes a circular arc transition sub-portion 222, wherein the circular arc transition sub-portion 222 is connected with the deflection sub-portion 221 and the body portion 21 and is disposed between the deflection sub-portion 221 and the body portion 21, and thus, the deflection sub-portion 221 forms a circular arc transition sub-portion 222 to transition the front edge 22 to the deflection sub-portion 221 or transition the deflection sub-portion 221 to the front edge 22, so as to ensure the aesthetic appearance of the blade 20.
In addition, since the arc transition sub-portion 222 also has a deflection angle a with respect to the main body portion 21 and the deflection angles a with respect to the main body portion 21 are different from each other, the attack angle c of the blade 20 can be reduced, that is, the arc transition sub-portion 222 also has an effect of reducing noise of the axial flow wind wheel, so in some embodiments of the present application, the arc transition sub-portion 221 is disposed corresponding to the wind speed at which the axial flow wind wheel mainly operates, and a longer arc transition sub-portion 222 can be disposed along the blade root to blade tip direction of the blade 20 so that the blade 20 can cope with abrupt wind speed.
In a second aspect, an embodiment of the present application provides an air conditioner external unit, where the air conditioner external unit includes an axial flow wind wheel as above.
Based on the air conditioner external unit in the embodiment of the application, due to the adoption of the axial flow wind wheel, noise generated in the running process of the air conditioner external unit can be reduced through the axial flow wind wheel, and the deflection sub-part 221 of the axial flow wind wheel has a smaller attack angle c, so that the axial flow wind wheel is more difficult to stall, and the reliability of the air conditioner external unit is improved.
In a third aspect, an embodiment of the present application provides an air conditioner, where the air conditioner includes the axial flow wind wheel or the air conditioner external unit.
Based on the air conditioner in the embodiment of the application, due to the adoption of the axial flow wind wheel, the noise generated in the running process of the air conditioner can be reduced through the axial flow wind wheel, and the deflection sub-part 221 of the axial flow wind wheel has a smaller attack angle c, so that the axial flow wind wheel is more difficult to stall, and the reliability of the air conditioner is improved.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (10)
1. An axial flow wind turbine, comprising:
a hub; and
a plurality of blades spaced apart in a circumferential direction of the hub, the blades including a body portion and a leading edge portion connected; wherein at least part of the structure of the leading edge portion is deflected with respect to the body portion toward the pressure face side of the blade to form a deflected rotor portion.
2. The axial flow wind wheel according to claim 1, wherein a deflection angle of the deflector portion with respect to the body portion is 3 ° or more and 45 ° or less.
3. The axial flow wind wheel according to claim 2, wherein a deflection angle of the deflector portion with respect to the body portion is 5 ° or more and 30 ° or less.
4. The axial flow wind wheel according to claim 1, wherein a ratio of a contour length of the deflector portion to a contour length of the leading edge portion in a projection in an axial direction of the hub is 0.35 or more and 1 or less.
5. The axial flow wind wheel according to claim 4, wherein a ratio of a contour length of the deflector portion to a contour length of the leading edge portion is 0.5 or more and 0.8 or less.
6. The axial flow wind wheel of claim 4, wherein the deflector portion includes a proximal end proximal to the hub and a distal end distal to the hub, the ratio of the contour length between the distal end and the blade root of the blade to the contour length of the leading edge portion being less than or equal to 0.85 in a projection along the axial direction of the hub;
the proximal end is located on the blade root of the blade or the proximal end is spaced from the blade root of the blade.
7. The axial flow wind wheel according to claim 1, wherein in a cross section formed by cutting the blades circumferentially along the hub and passing through the deflector portion, a ratio of a chord length of the deflector portion to a total chord length of the cross section is 0.05 or more and 0.25 or less.
8. The axial flow wind wheel of claim 1, wherein the leading edge portion further comprises a circular arc transition sub-portion connected to and disposed between the deflector sub-portion and the body portion.
9. An air conditioner outdoor unit, comprising:
an axial flow wind turbine according to any one of claims 1-8.
10. An air conditioner, comprising:
an axial flow wind wheel according to any one of claims 1-8; or (b)
The outdoor unit of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321513634.8U CN220505393U (en) | 2023-06-13 | 2023-06-13 | Axial flow wind wheel, air conditioner external unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321513634.8U CN220505393U (en) | 2023-06-13 | 2023-06-13 | Axial flow wind wheel, air conditioner external unit and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN220505393U true CN220505393U (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321513634.8U Active CN220505393U (en) | 2023-06-13 | 2023-06-13 | Axial flow wind wheel, air conditioner external unit and air conditioner |
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| Country | Link |
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| CN (1) | CN220505393U (en) |
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- 2023-06-13 CN CN202321513634.8U patent/CN220505393U/en active Active
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