CN220365767U - Axial flow fan blade and air conditioner - Google Patents

Abstract

The utility model 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 at the outer edge of the fan blade body; the hem is in the first operating condition, and the hem sets up in parallel with fan blade body outer fringe tangent plane, and in the second operating condition, is the contained angle setting between the tangent plane of hem and fan blade body outer fringe. Under the condition that the axial flow fan blade runs at a lower rotating speed, the folded edge and the fan blade body are positioned on the same plane, and the fan blade body and the folded edge are used for supplying air together at the moment so as to ensure the air output of the axial flow fan blade; under the condition that the axial flow fan blade runs at a higher rotating speed, the folded edge rotates relative to the fan blade body to be in a folded shape, so that vortex airflow is restrained, and air supply noise is remarkably reduced. The folded edge is rotatably arranged on the fan blade body, so that the maximum air quantity can be ensured when the axial flow fan blade runs at a low speed, and the folded edge can be folded relative to the fan blade body when the axial flow fan blade runs at a high rotating speed, so that the noise is remarkably reduced.

Description

Axial flow fan blade and air conditioner

Technical Field

The utility model relates to the technical field of air conditioning equipment, in particular to an axial flow fan blade and an air conditioner.

Background

The axial flow fan blade is widely applied to an external machine of an air conditioner, and a certain gap is usually arranged between the existing axial flow fan blade and the guide ring so as to avoid collision between the fan blade and the guide ring and ensure assembly errors. However, the clearance also causes leakage of air flow and noise, which affects the user's experience.

Part of the existing axial flow fan blades are bent to form turned edges, so that leakage vortex is restrained through the turned edges, noise is reduced, and the air quantity is affected.

Disclosure of Invention

The utility model provides an axial flow fan blade and an air conditioner, which can ensure the maximum air quantity and effectively reduce noise.

Embodiments of the utility model may be implemented as follows:

in a first aspect, the utility model provides an axial flow fan blade, which comprises a fan blade body and a folded edge;

the folding edge is movably arranged at the outer edge of the fan blade body, the folding edge has a first working state and a second working state, the folding edge is parallel to the tangent plane of the outer edge of the fan blade body in the first working state, and an included angle is formed between the folding edge and the tangent plane of the outer edge of the fan blade body in the second working state.

In the above embodiment, when the axial flow fan blade runs at a lower rotation speed, the folded edge is parallel to the outer edge section of the fan blade body, that is, the folded edge and the fan blade body are located on the same plane, and at this time, the fan blade body and the folded edge are used for supplying air together to ensure the air output of the axial flow fan blade; under the condition that the axial flow fan blade runs at a higher rotating speed, the folded edge is arranged at an included angle with the tangential plane of the outer edge of the fan blade body, namely, the folded edge rotates relative to the fan blade body to be in a turnover shape, so that vortex airflow is restrained, and the air supply noise is remarkably reduced. Therefore, the folded edge can be rotatably arranged on the fan blade body, so that the maximum air quantity can be ensured when the axial flow fan blade runs at a low speed, and the folded edge can be folded relative to the fan blade body when the axial flow fan blade runs at a high rotating speed, thereby remarkably reducing noise.

In an optional embodiment, the axial flow fan blade further comprises a reset piece, the reset piece is arranged on the fan blade body, the folded edge is movably connected with the fan blade body through the reset piece, and the reset piece is used for enabling the folded edge to have a movement trend of recovering from the second working state to the first working state.

In the above embodiment, the folded edge is in a folded state under the condition of a larger rotating speed, and the reset piece drives the folded edge to be restored to a state in the same plane with the fan blade body under the condition of a smaller rotating speed, so that the two states of the folded edge and the fan blade body are switched, and the reset piece is ensured to be in a state in which the folded edge can be restored to the same plane with the fan blade body.

In an alternative embodiment, the resetting piece is made of a material capable of generating elastic deformation, and the resetting piece can generate elastic deformation under the driving of the folded edge and drive the folded edge to recover from the second working state to the first working state through elastic potential energy.

In the above embodiment, in the process of driving the folded edge to be in the folded state at a relatively high rotation speed, the folded edge also drives the reset piece to twist and generate elastic deformation; after the rotating speed is reduced, the resetting piece drives the folded edge to rotate through elastic recovery potential energy, so that the folded edge is recovered to a state in the same plane with the fan blade body from a folded state.

In an alternative embodiment, the fan blade body is provided with a receiving channel, and the reset element is fixedly arranged in the receiving channel.

In the above embodiment, the reset piece is disposed in the accommodating channel, so that the reset piece is prevented from being disposed on the outer wall surface of the fan blade to affect the appearance structure of the fan blade body, thereby preventing the normal air supply of the fan blade body from being affected, and ensuring the structural stability and structural strength of the reset piece on the fan blade body.

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 for exposing the reset piece arranged in the accommodating channel.

In the above embodiments, the recess is provided to reveal the return member so that the flap can be connected to the return member; in addition, the groove can play a role in avoiding the connecting part, so that the folding edge can rotate relative to the fan blade body.

In an alternative embodiment, the reset element includes a rod body and a clamping portion, the clamping portion is convexly disposed on an outer wall of the rod body, the clamping portion is in interference fit with the accommodating channel, and the groove is used for exposing the rod body, so that the reset element can be in interference fit with the rod body.

In the above embodiment, the outer diameter of the clamping portion is slightly larger than the inner diameter of the accommodating channel so as to realize interference fit between the clamping portion and the accommodating channel, so that the resetting piece is convenient to process, simple to assemble and capable of being installed in the accommodating channel tightly.

In an alternative embodiment, a plurality of clamping parts are arranged on the rod body at intervals, the number of the grooves comprises a plurality of grooves, the grooves divide the accommodating channel into a plurality of sections, and each section of accommodating channel is in interference fit with at least one clamping part.

In the above embodiment, each section of the channel is in interference fit with at least one clamping portion, so that structural stability and structural strength of the reset piece arranged in the channel are ensured, and loosening or detachment of the reset piece relative to the accommodating channel is avoided.

In an alternative embodiment, the hem includes hem body and connecting portion, connecting portion are protruding to be located be the arcuately the indent side of hem body, the tip of connecting portion is provided with the open slot, the open slot with reset piece interference fit.

In the above embodiment, the open slot is in an arc shape matching with the shape of the resetting piece, the connecting portion extends into the groove, and the open slot is in clamping fit with the resetting piece and keeps interference fit with the resetting piece, so that the folded edge is stably mounted on the resetting piece, and the folded edge is prevented from sliding relative to the resetting piece.

In an alternative embodiment, the axial flow fan blade further comprises a hub, the inner edge of the fan blade body is connected with the hub, and the folded edge is connected with the outer edge of the fan blade body.

In the above embodiment, since the flange and the outer edge of the blade body far from the hub are movably connected, the flange is located on the same plane as the blade body or on the curvature extension surface thereof, so that the air is normally supplied through the blade body and the flange.

In a second aspect, the present utility model provides an air conditioner, including an indoor unit and an outdoor unit, the indoor unit and the outdoor unit being connected by a pipe, the outdoor unit including the axial flow fan blade according to any one of the foregoing embodiments, the axial flow fan blade being mounted at a motor bracket of the outdoor unit and rotating at a wind guide ring of the outdoor unit.

The axial flow fan blade and the air conditioner provided by the embodiment of the utility model have the beneficial effects that: under the condition that the axial flow fan blade runs at a lower rotating speed, the folded edge is arranged parallel to the tangential plane of the outer edge of the fan blade body, namely the folded edge and the fan blade body are positioned on the same plane, and the fan blade body and the folded edge are used for supplying air together at the moment so as to ensure the air output of the axial flow fan blade; under the condition that the axial flow fan blade runs at a higher rotating speed, the folded edge is arranged at an included angle with the tangential plane of the outer edge of the fan blade body, namely, the folded edge rotates relative to the fan blade body to be in a turnover shape, so that vortex airflow is restrained, and the air supply noise is remarkably reduced. Therefore, the folded edge can be rotatably arranged on the fan blade body, so that the maximum air quantity can be ensured when the axial flow fan blade runs at a low speed, and the folded edge can be folded relative to the fan blade body when the axial flow fan blade runs at a high rotating speed, thereby remarkably reducing noise.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an axial flow fan blade according to an embodiment of the present utility model;

FIG. 2 is an exploded view of an axial flow fan blade according to an embodiment of the present utility model;

FIG. 3 is a partial enlarged view of an axial flow fan blade according to an embodiment of the present utility model;

FIG. 4 is a partial cross-sectional view of an axial flow fan blade according to an embodiment of the present utility model;

FIG. 5 is a schematic structural diagram of a first state of an axial flow fan blade according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a second state of an axial flow fan blade according to an embodiment of the present utility model.

Icon: 10-axial flow fan blades; 100-hub; 200-fan blade bodies; 210-inner edge; 220-outer edge; 230-receiving channel; 240-grooves; 300-flanging; 310-flanging body; 320-connecting part; 330-open slot; 400-resetting piece; 410-a stick; 420-catch.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The axial flow fan blade is widely applied to an external machine of an air conditioner due to the simple structure and large air output. A certain gap is usually arranged between the existing axial flow fan blade and the guide ring so as to avoid collision between the fan blade and the guide ring and ensure assembly errors. However, the clearance also causes leakage of air flow and noise, which affects the user's experience.

Part of the existing axial flow fan blades are bent to form a flanging, so that leakage vortex is restrained through the flanging, noise is reduced, and the air quantity is influenced. Therefore, under the condition that the flanging structure is not arranged on the existing axial flow fan blade, the air quantity is large when the motor drives the axial flow fan blade to rotate at a low rotating speed, the noise is moderate, and the noise is obviously increased although the air quantity is large when the motor drives the axial flow fan blade to rotate at a high rotating speed; under the condition that the flanging structure is arranged on the axial flow fan blade, the noise is low when the motor drives the axial flow fan blade to rotate at a low rotating speed, but the air output is quite obvious in attenuation compared with the air output when the flanging structure is not arranged, and the noise is moderate only when the air output is large when the motor drives the axial flow fan blade to rotate at a high rotating speed.

Accordingly, in view of the above problems, the present utility model provides an air conditioner including an indoor unit and an outdoor unit connected through a duct, the outdoor unit including an axial flow fan installed at a motor bracket of the outdoor unit and rotated at a wind guide ring of the outdoor unit. Through the axial flow fan blade, the maximum air quantity can be ensured, and the air outlet noise can be obviously reduced.

Referring to fig. 1 to 4, the axial flow fan blade 10 includes a hub 100, a fan body 200, and a flange 300, wherein the fan body 200 is connected to the hub 100, and the flange 300 is connected to the fan body 200. The hub 100 is configured to be mounted on a motor (not shown), so as to drive the hub 100 to rotate by the motor, and drive the fan blade body 200 and the flange 300 to rotate.

In detail, the flange 300 is rotatably disposed at the outer edge of the fan blade body 200. Therefore, the folded edge 300 and the fan blade body 200 can take two states: in the first working state (as shown in fig. 5), the folded edge 300 is disposed parallel to a tangential plane of the outer edge of the fan blade body 200, and it should be noted that the tangential plane refers to a plane or a curved surface formed by tangential lines, in other words, the folded edge 300 is located on an extending surface of the fan blade body 200; and a second working state (as shown in fig. 6), the folded edge 300 and the fan blade body 200 form an included angle.

In this embodiment, when the motor is not running or the hub 100 is driven to rotate at a low rotation speed, the flange 300 and the fan blade body 200 are located on the same plane, and at this time, the fan blade body 200 and the flange 300 can be used for supplying air together to ensure the air output of the axial flow fan blade 10; under the condition that the motor drives the hub 100 to rotate at a high rotation speed, the folded edge 300 rotates relative to the fan blade body 200 to be in a turnover shape, so that vortex airflow is restrained, and air supply noise is effectively reduced. Therefore, the folded edge 300 is positioned on the same plane with the blade body 200 when the axial flow blade 10 runs at a low speed, so as to ensure the maximum air quantity, and is folded relative to the blade body 200 when the axial flow blade 10 runs at a high speed, so that the noise is remarkably reduced.

It will be appreciated that as the rotational speed of the motor increases, the included angle between the fan blade body 200 and the flange 300 increases, so that the ability of the flange 300 to inhibit the vortex air flow increases.

Further, the inner edge 210 of the blade body 200 is connected to the hub 100, and the flange 300 is connected to the outer edge 220 of the blade body 200.

In the present embodiment, since the flange 300 is movably connected with the outer edge 220 of the fan blade body 200, the flange 300 is located on the same plane as the fan blade body 200 or on the curvature extension plane thereof, so that the fan blade body 200 and the flange 300 can supply air normally.

Of course, in other embodiments, the flange 300 may also be disposed on a side edge connecting between the inner edge 210 and the outer edge 220 of the fan blade body 200, which is not specifically limited herein.

Further, the axial flow fan blade 10 further includes a reset piece 400, the reset piece 400 is disposed on the fan blade body 200, the folded edge 300 is movably connected with the fan blade body 200 through the reset piece 400, the reset piece 400 is used for driving the folded edge 300 to restore to a state in which the folded edge 300 is located on the same plane as the fan blade body 200, in other words, the reset piece 400 is used for enabling the folded edge 300 to have a movement trend of restoring to the same plane as the fan blade body 200 from an included angle setting with the fan blade body 200.

In the present embodiment, the folded edge 300 is in a folded state under the condition of a larger rotation speed, and the folded edge 300 is driven by the reset piece 400 to restore to a state in the same plane with the fan blade body 200 under the condition of a smaller rotation speed, so as to realize the switching of the two states of the folded edge 300 and the fan blade body 200.

It should be noted that, as shown in fig. 5, when the axial flow fan blade 10 rotates at a smaller rotation speed under the drive of the motor, the fan blade body 200 blows downward, the lower surfaces of the fan blade body 200 and the folded edge 300 are pressure surfaces, and the pressure of the pressure surface of the folded edge 300 is smaller than the acting force of the reset piece 400 on the folded edge 300 due to the smaller gas flow speed in this case, so that the folded edge 300 is not turned over sufficiently; therefore, when the motor is not running or rotates at a low rotation speed, the flange 300 is kept in the same plane as the blade body 200.

As shown in fig. 6, as the rotation speed of the motor increases, the rotation speed of the axial flow fan blade 10 increases and the air supply amount increases, in which case the air flow rate is high to make the pressure smaller, and the pressure applied to the pressure surface of the folded edge 300 is greater than or equal to the acting force generated by the reset piece 400 on the folded edge 300, so that the folded edge 300 is turned over relative to the fan blade body 200; therefore, when the motor rotates at a higher rotation speed, the folded edge 300 and the fan blade body 200 form an included angle to be in a folded state.

It will be appreciated that as the rotational speed increases, the flip angle of the flange 300 increases as the rotational speed reaches a threshold value.

In other embodiments, the reset element 400 may be driven by a driving device to rotate, so as to drive the folded edge 300 to rotate, so that the folded edge 300 can be turned over arbitrarily by manual control, so as to adapt to different usage scenarios.

Further, the reset piece 400 is made of a material capable of generating elastic deformation, and the reset piece 400 can generate elastic deformation under the driving of the folded edge 300 and can drive the folded edge 300 to restore to a state in the same plane with the fan blade body 200 through elastic potential energy.

It can be understood that, in the case that the flange 300 and the fan body 200 are located in the same plane, the reset member 400 is in a free state, and in the case that the flange 300 rotates relative to the fan body 200, the reset member 400 drives the flange 300 to rotate until the flange 300 and the fan body 200 are located in the same plane.

In this embodiment, the reset member 400 may be regarded as a torsion spring. In the process of rotating at a relatively high speed and driving the folded edge 300 to be in a folded state, the folded edge 300 also drives the resetting piece 400 to twist and generate elastic deformation; after the rotation speed is reduced, the reset piece 400 drives the folded edge 300 to rotate through elastic recovery potential energy, so that the folded edge 300 is recovered to a state in the same plane with the fan blade body 200 from a folded state.

Further, the fan blade body 200 is provided with a receiving channel 230, the reset element 400 is fixedly arranged in the receiving channel 230, and the folded edge 300 is fixedly connected with the reset element 400.

In this embodiment, by arranging the reset piece 400 in the accommodating channel 230, the reset piece 400 can be prevented from being arranged 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 piece 400 mounted on the fan blade body 200.

It will be appreciated that in this embodiment, the flange 300 may be fixedly attached to the end of the reset element 400 that extends out of the receiving channel 230, or otherwise.

In detail, the flange 300 is arc-shaped, the flange 300 includes a flange body 310 and a connecting portion 320, the connecting portion 320 is convexly arranged on the concave side of the arc-shaped flange body 310, an open groove 330 is arranged at the end of the connecting portion 320, and the open groove 330 is in interference fit with the resetting piece 400.

The fan blade body 200 is further provided with a groove 240, the groove 240 is communicated with the accommodating channel 230, and the groove 240 is used for exposing the reset piece 400 arranged in the accommodating channel 230, so that the open slot 330 is located in the groove 240 and in interference fit with the limiting part.

In this embodiment, the open slot 330 is in an arc shape matching with the shape of the reset piece 400, the connecting portion 320 extends into the groove 240, and the open slot 330 is in clamping fit with the reset piece 400 and keeps interference fit, so that the flange 300 is firmly mounted on the reset piece 400, and the flange 300 is prevented from sliding relative to the reset piece 400. The groove 240 can avoid the connection portion 320, so that the folded edge 300 can rotate relative to the fan blade body 200.

Further, the reset piece 400 includes a rod body 410 and a clamping portion 420, the clamping portion 420 is disposed around an outer wall of the rod body 410, the outer diameter of the clamping portion 420 is larger than that of the rod body 410, the clamping portion 420 is in interference fit with the accommodating channel 230, and the groove 240 is used for exposing the rod body 410, so that the opening groove 330 is in interference fit with the rod body 410.

In this embodiment, the outer diameter of the holding portion 420 is slightly larger than the inner diameter of the accommodating channel 230, so as to achieve interference fit between the holding portion 420 and the accommodating channel 230, so that the resetting member 400 is not only convenient to process and assemble, but also can be tightly mounted in the accommodating channel 230.

Further, the rod body 410 is provided with a plurality of retaining portions 420 distributed at intervals, the number of the grooves 240 and the open slots 330 includes a plurality of grooves 240 and a plurality of open slots 330 disposed in one-to-one correspondence, the plurality of grooves 240 divide the accommodating channels 230 into a plurality of segments, and each segment of accommodating channel 230 is in interference fit with at least one retaining portion 420.

The number of the connection portions 320 is plural, and the end portions of the connection portions 320 are each provided with an open groove 330; since the flange 300 has an arc structure, in order to ensure that the line connecting the plurality of open slots 330 is a straight line, the length of the connecting portion 320 disposed at the middle of the arc-shaped sidewall of the flange 300 is greater than the length of the connecting portions 320 disposed at both sides.

In this embodiment, each section of the channel is in interference fit with at least one retaining portion 420, so as to ensure structural stability and structural strength of the reset member 400 disposed in the channel, and prevent the reset member 400 from loosening or disengaging with respect to the accommodating channel 230.

Alternatively, the number of the grooves 240 and the open grooves 330 is three, and four holding portions 420 are provided on the rod body 410, wherein two holding portions 420 are located at two ends of the rod body 410, and the other two spaces are provided in the middle of the rod body 410, so that each section of channel is in interference fit with one holding portion 420.

Of course, in other embodiments, the number of the grooves 240, the open grooves 330 and the holding portions 420 may be other numbers, which are not limited herein.

Further, the shape of the flange 300 is adapted to the contour of the outer edge 220 of the fan blade body 200.

In this embodiment, the outer edge 220 of the fan blade body 200 is arc-shaped, and the folded edge 300 is also arc-shaped. In the case that the folded edge 300 and the fan blade body 200 are located in the same plane, the folded edge 300 is tightly attached to the outer edge 220 of the fan blade body 200, so as to avoid the influence of the folded edge 300 on the air flow as an extension part of the fan blade body 200. It can be appreciated that the outer edge 220 of the fan blade body 200 may also have other profiles, such as a linear profile or a folded line profile, so long as the shape of the folded edge 300 is adapted to the profile 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 that the fan blade body 200 with different structures is suitable for improving the adaptability.

In summary, the embodiment of the utility model provides an axial flow fan blade 10 and an air conditioner, wherein when a motor does not run or drives a hub 100 to rotate at a low rotation speed, a flange 300 and a fan blade body 200 are located on the same plane, and the fan blade body 200 and the flange 300 are used for supplying air together to ensure the air output of the axial flow fan blade 10; when the motor drives the hub 100 to rotate at a high rotation speed, the flange 300 rotates with respect to the fan blade body 200 to form a turnover shape, so as to inhibit vortex airflow, thereby significantly reducing air supply noise. Therefore, the folded edge 300 is positioned on the same plane with the blade body 200 when the axial flow blade 10 runs at a low speed, so as to ensure the maximum air quantity, and is folded relative to the blade body 200 when the axial flow blade 10 runs at a high speed, so that the noise is remarkably reduced.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. An axial flow fan blade is characterized by comprising a fan blade body (200) and a folded edge (300);

the edge folding device comprises a fan blade body (200), and is characterized in that the edge folding device (300) is movably arranged at the outer edge of the fan blade body (200), the edge folding device (300) is provided with a first working state and a second working state, the edge folding device (300) is parallel to the tangential plane of the outer edge of the fan blade body (200) in the first working state, and an included angle is formed between the edge folding device (300) and the tangential plane of the outer edge of the fan blade body (200) in the second working state.

2. The axial flow fan blade according to claim 1, further comprising a reset member (400), the reset member (400) being disposed on the fan blade body (200), the folded edge (300) being movably connected with the fan blade body (200) through the reset member (400), the reset member (400) being configured to enable the folded edge (300) to have a movement tendency to return from the second working state to the first working state.

3. The axial flow fan blade according to claim 2, wherein the reset piece (400) is made of a material capable of generating elastic deformation, the reset piece (400) can generate elastic deformation under the driving of the folded edge (300), and the folded edge (300) is driven 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, wherein the fan blade body (200) is provided with a receiving channel (230), and the reset member (400) is fixedly disposed in the receiving channel (230).

5. The axial flow fan blade according to claim 4, wherein the fan blade body (200) is further provided with a groove (240), the groove (240) is communicated with the accommodating channel (230), and the groove (240) is used for exposing the reset piece (400) arranged in the accommodating channel (230).

6. The axial flow fan blade according to claim 5, wherein the reset element (400) comprises a bar body (410) and a clamping portion (420), the clamping portion (420) is convexly arranged on the outer wall of the bar body (410), the clamping portion (420) is in interference fit with the accommodating channel (230), and the groove (240) is used for exposing the bar body (410) so that the reset element (400) can be in interference fit with the bar body (410).

7. The axial flow fan blade according to claim 6, wherein a plurality of clamping portions (420) are arranged on the rod body (410) at intervals, the number of the grooves (240) comprises a plurality, the grooves (240) divide the accommodating channel (230) into a plurality of sections, and each section of accommodating channel (230) is in interference fit with at least one clamping portion (420).

8. The axial flow fan blade according to claim 2, wherein the flange (300) comprises a flange body (310) and a connecting portion (320), the connecting portion (320) is convexly arranged on the concave side of the flange body (310) in an arc shape, an open slot (330) is formed in the end portion of the connecting portion (320), and the open slot (330) is in interference fit with the reset piece (400).

9. The axial flow fan blade according to claim 1, further comprising a hub (100), wherein an inner edge (210) of the fan blade body (200) is connected to the hub (100), and wherein the flange (300) is connected to an outer edge (220) of the fan blade body (200).

10. An air conditioner, characterized by comprising an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a pipeline, the outdoor unit comprises an axial flow fan blade according to any one of claims 1-9, and the axial flow fan blade is installed at a motor bracket of the outdoor unit and rotates at an air guide ring of the outdoor unit.