Axial flow fan blade and air conditioner

Abstract

The invention provides an axial flow fan blade and an air conditioner, and relates to the technical field of air conditioning equipment. The axial flow fan blade comprises a fan blade body and a folded edge. The folded edge is rotatably arranged on the outer edge of the fan blade body; in the first working state, the folded edge is parallel to the tangent plane of the outer edge of the fan blade body, and in the second working state, an included angle is formed between the folded edge and the tangent plane of the outer edge of the fan blade body. Under the condition that the axial flow fan blade operates at a low rotating speed, the folded edge and the fan blade body are located on the same plane, and at the moment, the fan blade body and the folded edge are jointly used for air supply, so that the air outlet amount of the axial flow fan blade is guaranteed; and under the condition that the axial flow fan blade runs at a high rotating speed, the folded edge rotates relative to the fan blade body to be in a turnover shape, so that vortex airflow is inhibited, and the air supply noise is remarkably reduced. Therefore, due to the fact that the folded edge is rotatably arranged on the fan blade body, the maximum air volume can be guaranteed when the axial-flow fan blade operates at a low speed, and the folded edge can be folded relative to the fan blade body when the axial-flow fan blade operates at a high rotating speed, so that noise is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to an axial flow fan blade and an air conditioner. Background Art

[0002] Axial flow fan blades are widely used in the outdoor unit of air conditioners. A certain gap is usually set between the existing axial flow fan blades and the guide ring to avoid collision between the blades and the guide ring and to ensure assembly error. However, the gap will also cause air leakage and generate noise, affecting the user experience.

[0003] Some existing axial flow blades have flanges formed at the blade bends to suppress leakage vortices and thus reduce noise, but this will also affect the air volume. Summary of the invention

[0004] The present invention provides an axial flow fan blade and an air conditioner, which can ensure the maximum air volume and effectively reduce noise.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an axial flow fan blade, comprising a fan blade body and a folded edge;

[0007] The folded edge is movably arranged at the outer edge of the fan blade body, and the folded edge has a first working state and a second working state. In the first working state, the folded edge is arranged parallel to the cross-section of the outer edge of the fan blade body, and in the second working state, the folded edge is arranged at an angle to the cross-section of the outer edge of the fan blade body.

[0008] In the above embodiment, when the axial flow fan blade is running at a relatively low speed, the folded edge is arranged parallel to the section of the outer edge of the fan blade body, that is, the folded edge and the fan blade body are located in the same plane. At this time, the fan blade body and the folded edge are used together to supply air to ensure the air output of the axial flow fan blade; while when the axial flow fan blade is running at a relatively high speed, the folded edge and the section of the outer edge of the fan blade body are arranged at an angle, that is, the folded edge is rotated relative to the fan blade body to be folded, thereby suppressing the vortex airflow, thereby significantly reducing the air supply noise. Therefore, by rotatably setting the folded edge on the fan blade body, the maximum air volume can be ensured when the axial flow fan blade is running at a low speed, and the axial flow fan blade can be folded relative to the fan blade body to significantly reduce the noise.

[0009] In an optional embodiment, the axial flow fan blade also includes a reset member, which is arranged on the fan blade body, and the folded edge is movably connected to the fan blade body via the reset member, and the reset member is used to make the folded edge have a movement tendency to restore from the second working state to the first working state.

[0010] In the above embodiment, when the rotation speed is high, the folded edge is in a folded state, and when the rotation speed is low, the reset member drives the folded edge to return to a state where it is in the same plane as the fan blade body, thereby realizing the switching of the two states of the folded edge and the fan blade body, and ensuring that the reset member can restore the folded edge to a state where it is in the same plane as the fan blade body.

[0011] In an optional embodiment, the reset member is made of a material that can produce elastic deformation, and the reset member can produce elastic deformation driven by the folded edge, and drive the folded edge to recover from the second working state to the first working state through elastic potential energy.

[0012] In the above embodiment, when the rotation speed is high and drives the folded edge to be in a folded state, the folded edge will also drive the reset part to twist and produce elastic deformation; after the rotation speed decreases, the reset part drives the folded edge to rotate through elastic recovery potential energy, so that the folded edge is restored from the folded state to a state where it is in the same plane as the fan blade body.

[0013] In an optional embodiment, the fan blade body is provided with a accommodating channel, and the reset member is fixedly disposed in the accommodating channel.

[0014] In the above embodiment, by setting the reset member in the accommodating channel, it is possible to avoid the reset member being set on the outer wall surface of the fan blade to affect the appearance structure of the fan blade body, thereby avoiding affecting the normal air supply of the fan blade body, and ensuring the structural stability and strength of the reset member installed on the fan blade body.

[0015] In an optional embodiment, the fan blade body is further provided with a groove, the groove is communicated with the accommodating channel, and the groove is used to expose the reset member arranged in the accommodating channel.

[0016] In the above embodiment, the groove is provided to expose the reset member so that the folded edge can be connected to the reset member; in addition, the groove can play a role of avoiding the connection part so that the folded edge can rotate relative to the fan blade body.

[0017] In an optional embodiment, the reset member includes a rod body and a clamping portion, wherein the clamping portion is protruded from the outer wall of the rod body, the clamping portion is interference fit with the accommodating channel, and the groove is used to expose the rod body so that the reset member can be interference fit with the rod body.

[0018] In the above embodiment, the outer diameter of the clamping portion is slightly larger than the inner diameter of the accommodating channel to achieve interference fit between the clamping portion and the accommodating channel. Therefore, the reset member is not only convenient to process and assemble, but also can be securely installed in the accommodating channel.

[0019] In an optional embodiment, a plurality of spaced-apart retaining portions are provided on the rod body, the number of the grooves is multiple, the plurality of grooves divide the accommodating channel into a plurality of sections, and each section of the accommodating channel is interference fit with at least one retaining portion.

[0020] In the above embodiment, each section of the channel is interference-fitted with at least one holding portion, thereby ensuring the structural stability and strength of the reset member disposed in the channel and preventing the reset member from loosening or detaching from the accommodating channel.

[0021] In an optional embodiment, the folding edge includes a folding edge body and a connecting portion, wherein the connecting portion is protruding from the concave side of the arc-shaped folding edge body, and an open groove is provided at the end of the connecting portion, and the open groove is interference fit with the reset member.

[0022] In the above embodiment, the opening groove is in an arc shape matching the shape of the reset piece, the connecting portion extends into the groove, the opening groove is clamped and engaged with the reset piece and maintains an interference fit so that the folded edge is firmly mounted on the reset piece to prevent the folded edge from sliding relative to the reset piece.

[0023] In an optional embodiment, the axial flow fan blade further includes a hub, the inner edge of the fan blade body is connected to the hub, and the folded edge is connected to the outer edge of the fan blade body.

[0024] In the above embodiment, since the folded edge is movably connected to the outer edge of the fan blade body away from the hub, the folded edge is located in the same plane as the fan blade body or on the extended surface of its curvature, so that air can be normally supplied through the fan blade body and the folded edge.

[0025] In a second aspect, the present invention provides an air conditioner, comprising an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected by a pipe, and the outdoor unit comprises an axial flow fan blade as described in any one of the aforementioned embodiments, wherein the axial flow fan blade is mounted at a motor bracket of the outdoor unit and rotates at an air guide ring of the outdoor unit.

[0026] The beneficial effects of the axial flow fan blade and the air conditioner provided by the embodiments of the present invention include: when the axial flow fan blade is running at a relatively low speed, the folded edge is arranged parallel to the section of the outer edge of the fan blade body, that is, the folded edge and the fan blade body are located in the same plane, and at this time, the fan blade body and the folded edge are used together for air supply to ensure the air output of the axial flow fan blade; and when the axial flow fan blade is running at a relatively high speed, the folded edge is arranged at an angle to the section of the outer edge of the fan blade body, that is, the folded edge is rotated relative to the fan blade body to be folded, thereby suppressing the vortex airflow, and thus significantly reducing the air supply noise. Therefore, by rotatably setting the folded edge on the fan blade body, the maximum air volume can be guaranteed when the axial flow fan blade is running at a low speed, and the axial flow fan blade can be folded relative to the fan blade body when running at a high speed, thereby significantly reducing the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of an axial flow fan blade provided in an embodiment of the present invention;

[0029] Figure 2 An exploded view of an axial flow fan blade provided in an embodiment of the present invention;

[0030] Figure 3 A partial enlarged view of an axial flow fan blade provided in an embodiment of the present invention;

[0031] Figure 4 A partial cross-sectional view of an axial flow fan blade provided by an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the structure of an axial flow fan blade in a first state provided by an embodiment of the present invention;

[0033] Figure 6 A schematic diagram of the second state structure of an axial flow fan blade provided in an embodiment of the present invention.

[0034] Icons: 10-axial flow blade; 100-hub; 200-blade body; 210-inner edge; 220-outer edge; 230-accommodating channel; 240-groove; 300-folded edge; 310-folded edge body; 320-connecting part; 330-opening groove; 400-reset member; 410-rod body; 420-holding part. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] Axial flow fans are widely used in air conditioner outdoor units due to their simple structure and large air output. Currently, there is usually a certain gap between the axial flow fans and the guide ring to avoid collision between the blades and the guide ring and to ensure assembly error. However, the gap will also cause air leakage and generate noise, affecting the user experience.

[0042] Some existing axial flow fan blades are bent to form flanges to suppress leakage vortexes through the flanges to reduce noise, but this will affect the air volume. Therefore, when the current axial flow fan blades are not provided with a flange structure, the air volume is large and the noise is moderate when the motor drives the axial flow fan blades to rotate at a low speed, and the air volume is large but the noise is significantly increased when the motor drives the axial flow fan blades to rotate at a high speed; when the axial flow fan blades are provided with a flange structure, the noise is low when the motor drives the axial flow fan blades to rotate at a low speed, but the air volume is significantly attenuated compared to the air volume when the flange structure is not provided. Only when the motor drives the axial flow fan blades to rotate at a high speed, the air volume is large and the noise is moderate.

[0043] Therefore, based on the above problems, the present invention provides an air conditioner, which includes an indoor unit and an outdoor unit, the indoor unit and the outdoor unit are connected by a pipeline, and the outdoor unit includes an axial flow fan blade, which is installed at the motor bracket of the outdoor unit and rotates at the air guide ring of the outdoor unit. The axial flow fan blade can ensure the maximum air volume and significantly reduce the air outlet noise.

[0044] See also Figures 1 to 4The axial flow fan blade 10 includes a hub 100, a fan blade body 200 and a folded edge 300. The fan blade body 200 is connected to the hub 100, and the folded edge 300 is connected to the fan blade body 200. The hub 100 is used to be installed on a motor (not shown) so that the motor drives the hub 100 to rotate, and drives the fan blade body 200 and the folded edge 300 to rotate.

[0045] Specifically, the folded edge 300 is rotatably disposed on the outer edge of the fan blade body 200. Therefore, the folded edge 300 and the fan blade body 200 can present two states: a first working state (eg, Figure 5 As shown), the folded edge 300 is arranged parallel to the outer edge section of the fan blade body 200. It should be noted that the section refers to a plane or curved surface composed of tangent lines. In other words, the folded edge 300 is located on the extension surface of the fan blade body 200; and the second working state (as shown Figure 6 As shown), the folded edge 300 is arranged at an angle with the fan blade body 200.

[0046] In this embodiment, when the motor is not running or the hub 100 is driven to rotate at a low speed, the folded edge 300 and the blade body 200 are located in the same plane. At this time, the blade body 200 and the folded edge 300 can be used together to supply air to ensure the air output of the axial flow blade 10; and when the motor drives the hub 100 to rotate at a high speed, the folded edge 300 rotates relative to the blade body 200 to be folded, thereby suppressing the vortex airflow and effectively reducing the air supply noise. Therefore, when the axial flow blade 10 is running at a low speed, the folded edge 300 is located in the same plane as the blade body 200 to ensure the maximum air volume, and when the axial flow blade 10 is running at a high speed, it is folded relative to the blade body 200 to significantly reduce the noise.

[0047] It can be understood that as the rotation speed of the motor increases, the angle between the fan blade body 200 and the folded edge 300 also increases, so that the ability of the folded edge 300 to suppress the vortex airflow also increases.

[0048] Furthermore, the inner edge 210 of the fan blade body 200 is connected to the hub 100 , and the folded edge 300 is connected to the outer edge 220 of the fan blade body 200 .

[0049] In this embodiment, since the folded edge 300 is movably connected to the outer edge 220 of the fan blade body 200, the folded edge 300 is located on the same plane as the fan blade body 200 or on the extended surface of its curvature, so that air is normally supplied through the fan blade body 200 and the folded edge 300.

[0050] Of course, in other embodiments, the folded edge 300 may also be disposed on the side edge between the inner edge 210 and the outer edge 220 of the wind blade body 200 , which is not specifically limited herein.

[0051] Furthermore, the axial flow fan blade 10 also includes a reset member 400, which is arranged on the fan blade body 200. The folded edge 300 is movably connected to the fan blade body 200 through the reset member 400. The reset member 400 is used to drive the folded edge 300 to return to a state where it is in the same plane as the fan blade body 200. In other words, the reset member 400 is used to make the folded edge 300 have a movement tendency from being set at an angle to the fan blade body 200 to being in the same plane as the fan blade body 200.

[0052] In this embodiment, when the rotation speed is high, the folded edge 300 is in a folded state, and when the rotation speed is low, the reset member 400 drives the folded edge 300 to return to a state where it is in the same plane as the fan blade body 200, thereby realizing the switching of the two states of the folded edge 300 and the fan blade body 200.

[0053] It should be noted that if Figure 5 As shown, when the axial flow fan blade 10 is driven by the motor to rotate at a relatively low speed, the fan blade body 200 supplies air downward, and the lower surfaces of the fan blade body 200 and the folded edge 300 are pressure surfaces. Since the gas flow rate is relatively small in this case, the pressure on the pressure surface of the folded edge 300 is smaller than the force exerted by the reset member 400 on the folded edge 300, which is insufficient to flip the folded edge 300. Therefore, when the motor is not running or rotating at a low speed, the folded edge 300 remains in the same plane as the fan blade body 200.

[0054] like Figure 6 As shown, as the motor speed increases, the rotation speed of the axial flow fan blade 10 increases and the air supply volume increases. In this case, the gas flow rate is large to make the pressure smaller, and the pressure on the pressure surface of the folded edge 300 is greater than or equal to the force exerted by the reset member 400 on the folded edge 300, so that the folded edge 300 flips relative to the fan blade body 200; therefore, when the motor rotates at a higher speed, the folded edge 300 is set at an angle with the fan blade body 200 to be in a folded state.

[0055] It is understandable that after the rotation speed reaches a critical value, as the rotation speed increases, the flipping angle of the folded edge 300 also increases.

[0056] In other embodiments, the reset member 400 can also be driven to rotate by a driving device to drive the folding edge 300 to rotate, so that the folding edge 300 can be turned over arbitrarily by manual control to adapt to different usage scenarios.

[0057] Furthermore, the reset member 400 is made of a material that can generate elastic deformation. The reset member 400 can generate elastic deformation driven by the folded edge 300 and drive the folded edge 300 to restore to a state where it is located in the same plane as the fan blade body 200 through elastic potential energy.

[0058] It can be understood that when the folded edge 300 and the fan blade body 200 are in the same plane, the reset member 400 is in a free state, and when the folded edge 300 rotates relative to the fan blade body 200, the reset member 400 will drive the folded edge 300 to rotate until the folded edge 300 and the fan blade body 200 are in the same plane.

[0059] In this embodiment, the reset member 400 can be regarded as a torsion spring. When the rotation speed is high and the folded edge 300 is turned upside down, the folded edge 300 will also drive the reset member 400 to twist and produce elastic deformation; and when the rotation speed decreases, the reset member 400 drives the folded edge 300 to rotate through elastic recovery potential energy, so that the folded edge 300 is restored from the folded state to the state of being in the same plane as the fan body 200.

[0060] Furthermore, the fan blade body 200 is provided with a receiving channel 230 , the reset member 400 is fixedly disposed in the receiving channel 230 , and the folded edge 300 is fixedly connected to the reset member 400 .

[0061] In this embodiment, by setting the reset member 400 in the accommodating channel 230, it is possible to avoid the reset member 400 being set on the outer wall surface of the fan blade to affect the appearance structure of the fan blade body 200, thereby avoiding affecting the normal air supply of the fan blade body 200, and ensuring the structural stability and structural strength of the reset member 400 installed on the fan blade body 200.

[0062] It can be understood that, in this embodiment, the folded edge 300 can be fixedly connected to the end of the reset member 400 extending out of the accommodating channel 230, or fixedly connected in other ways.

[0063] In detail, the folding edge 300 is in an arc shape, and the folding edge 300 includes a folding edge body 310 and a connecting portion 320. The connecting portion 320 is convexly arranged on the concave side of the arc-shaped folding edge body 310. An opening groove 330 is provided at the end of the connecting portion 320, and the opening groove 330 is interference fit with the reset member 400.

[0064] The fan blade body 200 is further provided with a groove 240 which is communicated with the accommodating channel 230 . The groove 240 is used to expose the reset member 400 arranged in the accommodating channel 230 so that the opening groove 330 is located in the groove 240 and is interference fit with the limiting portion.

[0065] In this embodiment, the opening groove 330 is in an arc shape matching the shape of the reset member 400, the connecting portion 320 extends into the groove 240, and the opening groove 330 and the reset member 400 are locked and matched and maintain an interference fit, so that the folding edge 300 is firmly installed on the reset member 400, and the folding edge 300 is prevented from sliding relative to the reset member 400. The groove 240 can play a role of avoiding the connecting portion 320, so that the folding edge 300 can rotate relative to the fan body 200.

[0066] Furthermore, the reset member 400 includes a rod body 410 and a clamping portion 420, the clamping portion 420 is arranged on the outer wall of the rod body 410, and the outer diameter of the clamping portion 420 is larger than the outer diameter of the rod body 410, the clamping portion 420 is interference fit with the accommodating channel 230, and the groove 240 is used to expose the rod body 410 so that the opening groove 330 is interference fit with the rod body 410.

[0067] In this embodiment, the outer diameter of the clamping portion 420 is slightly larger than the inner diameter of the accommodating channel 230 to achieve an interference fit between the clamping portion 420 and the accommodating channel 230 . Therefore, the reset member 400 is not only convenient to process and assemble, but can also be securely installed in the accommodating channel 230 .

[0068] Furthermore, a plurality of spaced-apart retaining portions 420 are provided on the rod body 410, and the number of the grooves 240 and the opening grooves 330 includes a plurality, and the plurality of grooves 240 and the plurality of opening grooves 330 are arranged in one-to-one correspondence, and the plurality of grooves 240 divide the accommodating channel 230 into a plurality of sections, and each section of the accommodating channel 230 is interference fit with at least one retaining portion 420.

[0069] It should be noted that there are multiple connecting parts 320, and open grooves 330 are set at the ends of the multiple connecting parts 320; and because the folding edge 300 has an arc-shaped structure, in order to ensure that the connecting line of the multiple opening grooves 330 is a straight line, the length of the connecting part 320 set in the middle of the arc-shaped side wall of the folding edge 300 is greater than the length of the connecting part 320 set on both sides.

[0070] In this embodiment, each section of the channel is interference-fitted with at least one holding portion 420 , thereby ensuring the structural stability and strength of the reset member 400 disposed in the channel and preventing the reset member 400 from loosening or detaching from the accommodating channel 230 .

[0071] Optionally, the number of grooves 240 and opening grooves 330 are both three, and four clamping portions 420 are provided on the rod body 410, two of which are located at both ends of the rod body 410, and the other two are spaced apart in the middle of the rod body 410, so that each channel section is interference fit with a clamping portion 420.

[0072] Of course, in other embodiments, the number of the grooves 240 , the opening grooves 330 , and the clamping portions 420 may be other numbers, which are not specifically limited here.

[0073] Furthermore, the shape of the folded edge 300 is adapted to the contour of the outer edge 220 of the wind blade body 200 .

[0074] In the present embodiment, the outer edge 220 of the fan blade body 200 is arc-shaped, and the folded edge 300 is also arc-shaped. When the folded edge 300 and the fan blade body 200 are located in the same plane, the folded edge 300 is closely attached to the outer edge 220 of the fan blade body 200 to avoid the folded edge 300 affecting the airflow as an extension of the fan blade body 200. It is understandable that the outer edge 220 of the fan blade body 200 can also be other contours, such as a straight line or a broken line, etc., as long as the shape of the folded edge 300 is adapted to the contour of the outer edge 220 of the fan blade body 200, and the folded edge 300 can be attached to the outer edge 220 of the fan blade body 200, so as to be suitable for fan blade bodies 200 with different structures and improve adaptability.

[0075] In summary, the embodiment of the present invention provides an axial flow fan blade 10 and an air conditioner. When the motor is not running or the hub 100 is driven to rotate at a low speed, the folded edge 300 and the fan blade body 200 are located in the same plane. At this time, the fan blade body 200 and the folded edge 300 are used together to supply air to ensure the air output of the axial flow fan blade 10; and when the motor drives the hub 100 to rotate at a high speed, the folded edge 300 rotates relative to the fan blade body 200 to be folded, thereby suppressing the vortex airflow, thereby significantly reducing the air supply noise. Therefore, when the axial flow fan blade 10 is running at a low speed, the folded edge 300 is located in the same plane as the fan blade body 200 to ensure the maximum air volume, and when the axial flow fan blade 10 is running at a high speed, it is folded relative to the fan blade body 200 to significantly reduce the noise.

[0076] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An axial flow fan blade, characterized in that: It comprises a fan blade body (200) and a folded edge (300); The folded edge (300) can be movably arranged on the outer edge of the fan blade body (200), and the folded edge (300) has a first working state and a second working state. In the first working state, the folded edge (300) is arranged parallel to the cut surface of the outer edge of the fan blade body (200), and in the second working state, the folded edge (300) is arranged at an angle to the cut surface of the outer edge of the fan blade body (200).

2. The axial flow fan blade according to claim 1, characterized in that: The axial flow fan blade further comprises a reset member (400), wherein the reset member (400) is arranged on the fan blade body (200), and the folded edge (300) is movably connected to the fan blade body (200) via the reset member (400), and the reset member (400) is used to enable the folded edge (300) to have a movement tendency to restore from the second working state to the first working state.

3. The axial flow fan blade according to claim 2, characterized in that: The reset member (400) is made of a material capable of generating elastic deformation. The reset member (400) can generate elastic deformation driven by the folded edge (300), and can drive the folded edge (300) to recover from the second working state to the first working state through elastic potential energy.

4. The axial flow fan blade according to claim 2, characterized in that: The fan blade body (200) is provided with a receiving channel (230), and the reset member (400) is fixedly arranged in the receiving channel (230).

5. The axial flow fan blade according to claim 4, characterized in that: The fan blade body (200) is further provided with a groove (240), the groove (240) being in communication with the accommodating channel (230), and the groove (240) being used to expose the reset member (400) arranged in the accommodating channel (230).

6. The axial flow fan blade according to claim 5, characterized in that: The reset member (400) comprises a rod body (410) and a clamping portion (420), wherein the clamping portion (420) is protruding from the outer wall of the rod body (410), the clamping portion (420) is interference fit with the accommodating channel (230), and the groove (240) is used to expose the rod body (410) so that the reset member (400) can be interference fit with the rod body (410).

7. The axial flow fan blade according to claim 6, characterized in that: The rod body (410) is provided with a plurality of spaced-apart retaining portions (420), the grooves (240) are provided in a plurality of numbers, the plurality of grooves (240) divide the accommodating channel (230) into a plurality of sections, and each section of the accommodating channel (230) is interference-fitted with at least one retaining portion (420).

8. The axial flow fan blade according to claim 2, characterized in that: The folding edge (300) comprises a folding edge body (310) and a connecting portion (320), wherein the connecting portion (320) is convexly arranged on the inner concave side of the arc-shaped folding edge body (310), and an open groove (330) is arranged at the end of the connecting portion (320), and the open groove (330) is interference-fitted with the reset member (400).

9. The axial flow fan blade according to claim 1, characterized in that: The axial flow fan blade further comprises a hub (100), an inner edge (210) of the fan blade body (200) is connected to the hub (100), and the folded edge (300) is connected to an outer edge (220) of the fan blade body (200).

10. An air conditioner, characterized in that: It includes an indoor unit and an outdoor unit, the indoor unit and the outdoor unit are connected by a pipeline, the outdoor unit includes an axial flow fan blade as described in any one of claims 1-9, the axial flow fan blade is installed at the motor bracket of the outdoor unit and rotates at the air guide ring of the outdoor unit.

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