Air conditioner axial flow fan blade and air conditioner
By adopting multiple annular blade designs in the axial flow air blades of the air conditioner, setting the difference in inclination angles between the first and second wings, the problems of low efficiency and high noise of the air blades are solved, and efficient and low noise air volume improvement is achieved.
Patent Information
- Application Number
- CN202410007099.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-02
- Publication Date
- 2025-07-11
AI Technical Summary
The conventional monolithic axial flow air blades have low efficiency and low full pressure of the air blades, making it difficult to achieve low noise at high speed and high air volume.
A multiple annular blade design is adopted, each blade extending spiral, and the inclination angles of the first and second wings are arranged differently, thereby improving the air blade efficiency and reducing noise by defining the inlet and outlet angles of the wings.
The efficiency and full pressure of the air blades are improved, the noise is reduced, and low noise operation is achieved in high air volume states.
Smart Images
Figure CN120292111A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of air conditioners, and in particular, to an axial flow fan blade and an air conditioner of an air conditioner. Background Art
[0002] Currently, a conventional outdoor unit of an air conditioner usually performs air exchange through an axial flow fan blade, and the axial flow fan blade usually consists of a plurality of axial flow blades. During the rotation of the plurality of axial flow blades, air is conveyed along the axial direction. Due to the special structure of the outdoor unit of the air conditioner, it is usually required that the axial flow blade has the characteristics of high air volume and low noise. However, for a conventional single-piece axial flow fan blade, the fan blade efficiency is low, the total pressure of the fan blade is low, and the improvement of noise is limited. It is difficult to truly achieve low noise in a state of high rotational speed and high air volume. Summary of the Invention
[0003] The problem solved by the present invention is how to improve the fan blade efficiency, increase the total pressure of the fan blade, and reduce the noise.
[0004] To solve the above problems, the present invention is solved by adopting the following technical solutions.
[0005] In one aspect, an axial flow fan blade of an air conditioner provided by an embodiment of the present invention includes a rotating shaft and a plurality of annular blades. The rotating shaft has an air inlet end and an air outlet end that are opposite to each other in the vertical direction. The plurality of annular blades are arranged around the periphery of the rotating shaft. Each annular blade extends in a spiral shape and forms a first airfoil root and a second airfoil root at both ends. The end face of the first airfoil root forms a first airfoil, and the first airfoil is joined to the outer peripheral surface of the rotating shaft and is arranged close to the air inlet end. The end face of the second airfoil root forms a second airfoil, and the second airfoil is joined to the outer peripheral surface of the rotating shaft and is arranged close to the air outlet end. Wherein, the included angle β1 between the tangent line of the mean camber line of the first airfoil at the trailing edge and the horizontal direction is less than the included angle β2 between the tangent line of the mean camber line of the second airfoil at the trailing edge and the horizontal direction.
[0006] The axial-flow airfoil of the air conditioner provided by the embodiment of the present invention surrounds a plurality of annular blades around the periphery of a rotating shaft. Each annular blade spirally extends and forms a first airfoil root near the air inlet end and a second airfoil root near the air outlet end at both ends. The end face of the first airfoil root forms a first airfoil, and the end face of the second airfoil root forms a second airfoil. Both the first airfoil and the second airfoil are joined to different positions on the outer peripheral surface of the rotating shaft. Among them, the angle β1 between the tangent line of the mean camber line of the first airfoil at the trailing edge and the horizontal direction is the outlet angle of the first airfoil, which can characterize the inclination state of the trailing edge of the first airfoil root. The angle β2 between the tangent line of the mean camber line of the second airfoil at the trailing edge and the horizontal direction is the outlet angle of the second airfoil, which can characterize the inclination state of the trailing edge of the second airfoil root. Wherein β1 is less than β2, which can make the outlet inclination angle of the first airfoil at the trailing edge less than that of the second airfoil at the trailing edge, making the trailing edge of the second airfoil root relatively more inclined and the unit work area larger. And since the second airfoil root is located on the air outlet side, setting the trailing edge angle of the second airfoil can improve the efficiency of the annular airfoil and increase the total pressure of the annular airfoil. While the trailing edge angle of the first airfoil is relatively small, it can ensure that the noise is maintained at a low level, achieving an increase in air volume while reducing noise.
[0007] Further, the angle α1 between the tangent line of the mean camber line of the first airfoil at the leading edge and the horizontal direction is less than the angle α2 between the tangent line of the mean camber line of the second airfoil at the leading edge and the horizontal direction.
[0008] The axial-flow airfoil of the air conditioner provided by the embodiment of the present invention. The angle α1 between the tangent line of the mean camber line of the first airfoil at the leading edge and the horizontal direction is the inlet angle of the first airfoil, which can characterize the inclination state of the leading edge of the first airfoil root. And the angle α2 between the tangent line of the mean camber line of the second airfoil at the leading edge and the horizontal direction is the inlet angle of the second airfoil, which can characterize the inclination state of the leading edge of the second airfoil root. Wherein α1 is less than α2, which can make the outlet inclination angle of the first airfoil at the leading edge less than that of the second airfoil at the leading edge, making the leading edge of the second airfoil root relatively more inclined and the unit work area larger. And since the second airfoil root is located on the air outlet side, setting the leading edge angle of the second airfoil can improve the efficiency of the annular airfoil and increase the total pressure of the annular airfoil. While the leading edge angle of the first airfoil is relatively small, it can ensure that the noise is maintained at a low level, achieving an increase in air volume while reducing noise.
[0009] Further, the angle β1 between the tangent line of the mean camber line of the first airfoil at the trailing edge and the horizontal direction is greater than the angle α1 between the tangent line of the mean camber line of the first airfoil at the leading edge and the horizontal direction.
[0010] The axial-flow airfoil of the air conditioner provided by the embodiment of the present invention can make the inclination angle at the trailing edge of the root of the first airfoil larger by defining that the inlet angle α1 of the first airfoil is smaller than the outlet angle β1, which is more conducive to the work done at the root of the first airfoil and improves the work efficiency.
[0011] Further, the included angle β2 between the tangent line of the mean camber line of the second airfoil at the trailing edge and the horizontal direction is greater than the included angle α2 between the tangent line of the mean camber line of the second airfoil at the leading edge and the horizontal direction.
[0012] The axial-flow airfoil of the air conditioner provided by the embodiment of the present invention can make the inclination angle at the trailing edge of the root of the second airfoil larger by defining that the inlet angle α2 of the second airfoil is smaller than the outlet angle β2, which is more conducive to the work done at the root of the second airfoil and improves the work efficiency.
[0013] Further, the included angle α1 between the tangent line of the mean camber line of the first airfoil at the leading edge and the horizontal direction is between 5° and 40°.
[0014] For the axial-flow airfoil of the air conditioner provided by the embodiment of the present invention, when the inclination angle of the leading edge of the root of the first airfoil is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the work done by the blade, affecting the air volume. By defining the angle range of the inlet angle α1 of the first airfoil, the inclination angle of the leading edge of the root of the first airfoil can be reasonably defined, ensuring axial air outlet while ensuring the work efficiency, thereby improving the airfoil efficiency and increasing the total pressure of the airfoil.
[0015] Further, the included angle β1 between the tangent line of the mean camber line of the first airfoil at the trailing edge and the horizontal direction is between 20° and 70°.
[0016] For the axial-flow airfoil of the air conditioner provided by the embodiment of the present invention, when the inclination angle of the trailing edge of the root of the first airfoil is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the work done by the blade, affecting the air volume. By defining the angle range of the outlet angle β1 of the first airfoil, the inclination angle of the trailing edge of the root of the first airfoil can be reasonably defined, ensuring axial air outlet while ensuring the work efficiency, thereby improving the airfoil efficiency and increasing the total pressure of the airfoil.
[0017] Further, the included angle α2 between the tangent line of the mean camber line of the second airfoil at the leading edge and the horizontal direction is between 15° and 50°.
[0018] For the axial-flow airfoil of the air conditioner provided by the embodiment of the present invention, when the inclination angle of the leading edge of the root of the second airfoil is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the work done by the blade, affecting the air volume. By defining the angle range of the inlet angle α2 of the second airfoil, the inclination angle of the leading edge of the root of the second airfoil can be reasonably defined, ensuring axial air outlet while ensuring the work efficiency, thereby improving the airfoil efficiency and increasing the total pressure of the airfoil.
[0019] Further, the included angle β2 between the tangent line of the mean camber line of the second airfoil at the trailing edge and the horizontal direction is between 30° and 85°.
[0020] For the axial-flow airfoil of the air conditioner provided by the embodiment of the present invention, when the trailing edge inclination angle of the root of the second airfoil is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the blade to do work, affecting the air volume. By limiting the angle range of the outlet angle β2 of the second airfoil, the trailing edge inclination angle of the root of the second airfoil can be reasonably limited, ensuring axial air outlet while ensuring the work efficiency, thereby improving the airfoil efficiency and increasing the total pressure of the airfoil.
[0021] Further, the difference between the included angle α2 between the tangent line of the mean camber line of the second airfoil at the leading edge and the horizontal direction and the included angle α1 between the tangent line of the mean camber line of the first airfoil at the leading edge and the horizontal direction is less than or equal to 30°.
[0022] For the axial-flow airfoil of the air conditioner provided by the embodiment of the present invention, by restricting the difference in the inlet angles of the first airfoil and the second airfoil, it is possible to avoid too large a spiral angle of the annulus blades and avoid too large a difference in the inlet angles of the upper and lower roots from being unable to do work together, ensuring the air supply effect of the annulus blades.
[0023] An air conditioner includes an air conditioner body and the aforementioned axial-flow airfoil of the air conditioner. A motor is installed in the air conditioner body, and the motor is in transmission connection with the rotating shaft. Description of the Drawings
[0024] Figure 1 is a schematic structural diagram of the axial-flow airfoil of the air conditioner provided by the first embodiment of the present invention from the first perspective;
[0025] Figure 2 is a schematic structural diagram of the axial-flow airfoil of the air conditioner provided by the first embodiment of the present invention from the second perspective;
[0026] Figure 3 is a schematic structural diagram of the axial-flow airfoil of the air conditioner provided by the first embodiment of the present invention from the third perspective;
[0027] Figure 4 is Figure 1 a schematic diagram of the joint of the root of the first airfoil and the rotating shaft in
[0028] Figure 5 is Figure 1 a schematic diagram of the joint of the root of the second airfoil and the rotating shaft in
[0029] Description of the Reference Numerals:
[0030] 100 - Axial flow fan blade for air conditioner; 110 - Rotating shaft; 111 - Air inlet end; 113 - Air outlet end; 130 - Annular blade; 131 - Air guiding channel; 150 - First airfoil root; 151 - First airfoil; 170 - Second airfoil root; 171 - Second airfoil. Detailed implementation manner
[0031] As disclosed in the background art, the prior art usually adopts a single - piece blade for axial flow air outlet of the axial flow fan blade. For a conventional single - piece axial flow fan blade, the fan blade has low efficiency, low total pressure, and limited improvement in noise. It is difficult to truly achieve low noise under the conditions of high rotational speed and high air volume.
[0032] To solve the above problems, the present invention provides a novel axial flow fan blade for an air conditioner and an air conditioner. To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.
[0033] First embodiment
[0034] See Figures 1 to 5 , this embodiment provides an axial flow fan blade 100 for an air conditioner, which can improve the fan blade efficiency, increase the total pressure of the fan blade, and reduce noise through the configuration and angle of the fan blade.
[0035] The axial flow fan blade 100 provided in this embodiment includes a rotating shaft 110 and a plurality of annular blades 130. The rotating shaft 110 has an air inlet end 111 and an air outlet end 113 that are opposite in the vertical direction. The plurality of annular blades 130 are arranged around the periphery of the rotating shaft 110. Each annular blade 130 extends in a spiral shape and forms a first airfoil root 150 and a second airfoil root 170 at both ends. The end face of the first airfoil root 150 forms a first airfoil 151. The first airfoil 151 is joined to the outer peripheral surface of the rotating shaft 110 and is arranged close to the air inlet end 111. The end face of the second airfoil root 170 forms a second airfoil 171. The second airfoil 171 is joined to the outer peripheral surface of the rotating shaft 110 and is arranged close to the air outlet end 113. Among them, the angle β1 between the tangent of the mean camber line H1 of the first airfoil 151 at the trailing edge and the horizontal direction is less than the angle β2 between the tangent of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction.
[0036] It should be noted that the axial flow fan blade 100 in this embodiment is applicable to an air conditioner. The air conditioner can be an outdoor unit of the air conditioner. A motor is arranged inside the outdoor unit of the air conditioner. The motor is connected to the rotating shaft 110 and can drive the plurality of annular blades 130 to rotate through the rotating shaft 110 to achieve axial air outlet.
[0037] It should be noted that in this embodiment, the first airfoil root 150 and the second airfoil root 170 are axially spaced apart on the outer peripheral surface of the rotating shaft 110, and the annular vane 130 extends in a spiral shape. That is, the annular vane 130 extends radially outward from the first airfoil root 150, spirally folds, turns back after reaching the distal end, and finally extends to the second airfoil root 170. Preferably, here the annular vane 130 can extend from the first airfoil root 150, spirally fold by 160° - 190°, and then fold back to the second airfoil root 170. Among them, the annular vane 130 can form an air guiding channel 131 with the rotating shaft 110. During the rapid rotation of the annular vane 130, the air guiding channel 131 can allow air flow through to reduce the motor load.
[0038] In this embodiment, a plurality of annular vanes 130 are arranged around the periphery of the rotating shaft 110. Each annular vane 130 spirally extends and forms a first airfoil root 150 near the air inlet end 111 and a second airfoil root 170 near the air outlet end 113 at both ends. The end face of the first airfoil root 150 forms a first airfoil 151, and the end face of the second airfoil root 170 forms a second airfoil 171. Both the first airfoil 151 and the second airfoil 171 are joined to different positions on the outer peripheral surface of the rotating shaft 110. Among them, the angle β1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the trailing edge and the horizontal direction is the outlet angle of the first airfoil 151, which can represent the inclination state of the trailing edge of the first airfoil root 150. The angle β2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction is the outlet angle of the second airfoil 171, which can represent the inclination state of the trailing edge of the second airfoil root 170. Among them, β1 is less than β2, which can make the outlet inclination angle of the first airfoil 151 at the trailing edge less than the outlet inclination angle of the second airfoil 171 at the trailing edge, making the trailing edge of the second airfoil root 170 relatively more inclined and the unit work area larger. And since the second airfoil root 170 is located on the air outlet side, setting the trailing edge angle of the second airfoil 171 can improve the efficiency of the annular vane and increase the total pressure of the annular vane. While the trailing edge angle of the first airfoil 151 is relatively small, it can ensure that the noise is maintained at a low level, achieving an increase in air volume while reducing noise.
[0039] It should also be noted that, in this embodiment, the mean camber line H1 of the first airfoil 151 refers to the arc connection line between the midpoint of the leading edge and the midpoint of the trailing edge of the first airfoil 151. This mean camber line H1 is located at the central position of the first airfoil 151, can divide the first airfoil 151 into two parts with equal areas, and the distances from the mean camber line H1 to the two arc-shaped edges of the first airfoil 151 are equal. The mean camber line H1 of the first airfoil 151 can characterize the bending degree of the first airfoil 151; the mean camber line H2 of the second airfoil 171 refers to the arc connection line between the midpoint of the leading edge and the midpoint of the trailing edge of the second airfoil 171. This mean camber line H2 is located at the central position of the second airfoil 171, can divide the second airfoil 171 into two parts with equal areas, and the distances from the mean camber line H2 to the two arc-shaped edges of the second airfoil 171 are equal. The mean camber line H2 of the second airfoil 171 can characterize the bending degree of the second airfoil 171.
[0040] In this embodiment, the included angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction is less than the included angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the leading edge and the horizontal direction. Specifically, the included angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction is the inlet angle of the first airfoil 151, which can characterize the inclination state of the root 150 of the first airfoil at the leading edge, while the included angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction is the inlet angle of the second airfoil 171, which can characterize the inclination state of the root 170 of the second airfoil at the leading edge. Wherein α1 is less than α2, which can make the outlet inclination angle of the first airfoil 151 at the leading edge less than the outlet inclination angle of the second airfoil 171 at the leading edge, making the leading edge of the root 170 of the second airfoil relatively more inclined and the unit work area larger. And since the root 170 of the second airfoil is located on the air outlet side, so setting the leading edge angle of the second airfoil 171 can improve the efficiency of the annular fan blade and increase the total pressure of the annular fan blade. While the leading edge angle of the first airfoil 151 is relatively small, which can ensure that the noise is maintained at a low level, achieving an increase in air volume while reducing noise.
[0041] In this embodiment, the included angle β1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the trailing edge and the horizontal direction is greater than the included angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction. Specifically, by defining different inclination angles on the inlet side and the outlet side of the first airfoil 151, and by defining that the inlet angle of the first airfoil 151 is less than the outlet angle, it can make the inclination angle of the root 150 of the first airfoil at the trailing edge larger, which is more conducive to the work done by the root 150 of the first airfoil and improves the work efficiency.
[0042] In this embodiment, the angle β2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction is greater than the angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the leading edge and the horizontal direction. Specifically, different inclination angles are defined on the inlet side and the outlet side of the second airfoil 171, and by defining that the inlet angle α2 of the second airfoil 171 is smaller than the outlet angle β2, it is possible to make the inclination angle at the trailing edge of the root 170 of the second airfoil larger, which is more conducive to the root 170 of the second airfoil to do work and improve the work efficiency.
[0043] The specific inclination angles of the first airfoil 151 and the second airfoil 171 in this embodiment are defined below to define the inlet angles and outlet angles of the roots 150 of the first airfoil and 170 of the second airfoil.
[0044] In this embodiment, the angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction is between 5° and 40°, preferably, the angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction can be 35°. Among them, when the inclination angle of the leading edge of the root 150 of the first airfoil is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the blade to do work and affects the air volume. By defining the angle range of the inlet angle α1 of the first airfoil 151, the inclination angle of the leading edge of the root 150 of the first airfoil can be reasonably defined, while ensuring axial air outlet, ensuring the work efficiency, thereby improving the efficiency of the wind blade and increasing the total pressure of the wind blade.
[0045] Furthermore, the angle β1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the trailing edge and the horizontal direction is between 20° and 70°, preferably, the angle β1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the trailing edge and the horizontal direction can be 65°. Among them, when the inclination angle of the trailing edge of the root 150 of the first airfoil is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the blade to do work and affects the air volume. By defining the angle range of the outlet angle β1 of the first airfoil 151, the inclination angle of the trailing edge of the root 150 of the first airfoil can be reasonably defined, while ensuring axial air outlet, ensuring the work efficiency, thereby improving the efficiency of the wind blade and increasing the total pressure of the wind blade.
[0046] In this embodiment, the included angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the leading edge and the horizontal direction is between 15° and 50°. Preferably, the included angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the leading edge and the horizontal direction can be 45°. Among them, when the inclination angle of the leading edge of the second airfoil root 170 is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the blade to do work and affects the air volume. By limiting the angle range of the inlet angle α2 of the second airfoil 171, the inclination angle of the leading edge of the second airfoil root 170 can be reasonably limited, while ensuring axial air outlet, ensuring the work efficiency, thereby improving the efficiency of the wind blade and increasing the total pressure of the wind blade.
[0047] In this embodiment, the included angle β2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction is between 30° and 85°. Preferably, the included angle β2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction can be 80°. Among them, when the inclination angle of the trailing edge of the second airfoil root 170 is too large, it is not conducive to axial air outlet, and when it is too small, it is not conducive to the blade to do work and affects the air volume. By limiting the angle range of the outlet angle β2 of the second airfoil 171, the inclination angle of the trailing edge of the second airfoil root 170 can be reasonably limited, while ensuring axial air outlet, ensuring the work efficiency, thereby improving the efficiency of the wind blade and increasing the total pressure of the wind blade.
[0048] In this embodiment, the difference between the included angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the leading edge and the horizontal direction and the included angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction is less than or equal to 30°. Preferably, in this embodiment, the difference between the included angle α2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the leading edge and the horizontal direction and the included angle α1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the leading edge and the horizontal direction is 10°. By restricting the difference in the inlet angles of the first airfoil 151 and the second airfoil 171, it is possible to avoid too large a spiral angle of the annular blade 130 and to avoid too large a difference in the inlet angles of the upper and lower roots from jointly doing work, ensuring the air supply effect of the annular blade 130.
[0049] In summary, this embodiment provides an axial-flow airfoil 100 for an air conditioner. A plurality of annular blades 130 are arranged around the periphery of a rotating shaft 110. Each annular blade 130 extends spirally and forms a first airfoil root 150 near the air inlet end 111 and a second airfoil root 170 near the air outlet end 113 at both ends. The end face of the first airfoil root 150 forms a first airfoil 151, and the end face of the second airfoil root 170 forms a second airfoil 171. Both the first airfoil 151 and the second airfoil 171 are joined to different positions on the outer peripheral surface of the rotating shaft 110. Among them, by limiting the values and magnitudes of the angle β1 between the tangent line of the mean camber line of the first airfoil 151 at the trailing edge and the horizontal direction, the angle β2 between the tangent line of the mean camber line of the second airfoil 171 at the trailing edge and the horizontal direction, the angle α1 between the tangent line of the mean camber line of the first airfoil 151 at the leading edge and the horizontal direction, and the angle α2 between the tangent line of the mean camber line of the second airfoil 171 at the leading edge and the horizontal direction, it is possible to make the unit work area of the blade larger, improve the efficiency of the annular airfoil, increase the total pressure of the annular airfoil, and at the same time ensure that the noise is maintained at a low level, achieving an increase in air volume while reducing noise.
[0050] Second Embodiment
[0051] This embodiment provides an air conditioner, including an air conditioner body and the aforementioned axial-flow airfoil 100 for an air conditioner. The basic structure, principle, and technical effects generated by this axial-flow airfoil 100 are the same as those of the first embodiment. For a brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding content in the first embodiment.
[0052] In this embodiment, the air conditioner includes an air conditioner body and an axial-flow airfoil 100 for an air conditioner. The axial-flow airfoil 100 for an air conditioner includes a rotating shaft 110 and a plurality of annular blades 130. The rotating shaft 110 has an air inlet end 111 and an air outlet end 113 that are opposite to each other in the vertical direction. The plurality of annular blades 130 are arranged around the periphery of the rotating shaft 110. Each annular blade 130 extends spirally and forms a first airfoil root 150 and a second airfoil root 170 at both ends. The end face of the first airfoil root 150 forms a first airfoil 151. The first airfoil 151 is joined to the outer peripheral surface of the rotating shaft 110 and is arranged near the air inlet end 111. The end face of the second airfoil root 170 forms a second airfoil 171. The second airfoil 171 is joined to the outer peripheral surface of the rotating shaft 110 and is arranged near the air outlet end 113. Among them, the angle β1 between the tangent line of the mean camber line H1 of the first airfoil 151 at the trailing edge and the horizontal direction is smaller than the angle β2 between the tangent line of the mean camber line H2 of the second airfoil 171 at the trailing edge and the horizontal direction. A motor is installed inside the air conditioner body, and the motor is in transmission connection with the rotating shaft 110.
[0053] In this embodiment, the air conditioner can be an outdoor unit of the air conditioner. The motor inside the outdoor unit of the air conditioner can drive the rotating shaft 110 to rotate, and then drive the annular blades 130 to rotate, realizing axial air outlet.
[0054] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.
Claims
1. An axial-flow air blade of an air conditioner, characterized in that, It includes a rotating shaft (110) and a plurality of annular blades (130). The rotating shaft (110) has an air inlet end (111) and an air outlet end (113) that are opposite to each other in the vertical direction. The plurality of annular blades (130) are arranged around the periphery of the rotating shaft (110). Each annular blade (130) extends in a spiral shape and forms a first airfoil root (150) and a second airfoil root (170) at both ends. The end face of the first airfoil root (150) forms a first airfoil (151). The first airfoil (151) is joined to the outer peripheral surface of the rotating shaft (110) and is arranged near the air inlet end (111). The end face of the second airfoil root (170) forms a second airfoil (171). The second airfoil (171) is joined to the outer peripheral surface of the rotating shaft (110) and is arranged near the air outlet end (113). Wherein, the included angle β1 between the tangent line of the mean camber line of the first airfoil (151) at the trailing edge and the horizontal direction is less than the included angle β2 between the tangent line of the mean camber line of the second airfoil (171) at the trailing edge and the horizontal direction.
2. The axial-flow air impeller of an air conditioner according to claim 1, wherein, The included angle α1 between the tangent line of the mean camber line of the first airfoil (151) at the leading edge and the horizontal direction is less than the included angle α2 between the tangent line of the mean camber line of the second airfoil (171) at the leading edge and the horizontal direction.
3. The axial-flow air impeller of an air conditioner according to claim 2, characterized in that, The included angle β1 between the tangent line of the mean camber line of the first airfoil (151) at the trailing edge and the horizontal direction is greater than the included angle α1 between the tangent line of the mean camber line of the first airfoil (151) at the leading edge and the horizontal direction.
4. The axial flow fan blade for an air conditioner according to claim 2, wherein The included angle β2 between the tangent line of the mean camber line of the second airfoil (171) at the trailing edge and the horizontal direction is greater than the included angle α2 between the tangent line of the mean camber line of the second airfoil (171) at the leading edge and the horizontal direction.
5. The axial flow fan blade of an air conditioner according to any one of claims 2-4, characterized in that, The included angle α1 between the tangent line of the mean camber line of the first airfoil (151) at the leading edge and the horizontal direction is between 5° and 40°.
6. The axial flow fan blade for an air conditioner according to claim 5, wherein The included angle β1 between the tangent line of the mean camber line of the first airfoil (151) at the trailing edge and the horizontal direction is between 20° and 70°.
7. The axial flow fan blade for an air conditioner according to any one of claims 2-4, characterized in that, The included angle α2 between the tangent line of the mean camber line of the second airfoil (171) at the leading edge and the horizontal direction is between 15° and 50°.
8. The axial-flow air impeller of an air conditioner according to claim 7, characterized in that The included angle β2 between the tangent line of the mean camber line of the second airfoil (171) at the trailing edge and the horizontal direction is between 30° and 85°.
9. The axial flow fan blade of an air conditioner according to any one of claims 2-4, characterized in that The difference between the included angle α2 between the tangent line of the mean camber line of the second airfoil (171) at the leading edge and the horizontal direction and the included angle α1 between the tangent line of the mean camber line of the first airfoil (151) at the leading edge and the horizontal direction is less than or equal to 30°.
10. An air conditioner, characterized in that, It includes an air conditioner body and the axial flow air blade of the air conditioner as described in any one of claims 1-9. A motor is installed in the air conditioner body, and the motor is in transmission connection with the rotating shaft (110).