An axial flow fan blade and an air conditioner

Abstract

The present invention discloses an axial flow fan blade and an air conditioner, relating to the technical field of air conditioners. The axial flow fan blade includes an inner hub, a wind guiding structure, and blades. The wind guiding structure is disposed between the inner hub and the blades, and the inner hub is fixedly connected to the blades through the wind guiding structure, and the wind guiding structure is used for guiding air. Compared with the prior art, since the axial flow fan blade provided by the present invention adopts a wind guiding structure fixedly connected between the inner hub and the blades, it can reduce the diameter of the inner hub while ensuring the connection strength, improve the wind guiding effect, and reduce the weight of the axial flow fan blade, improve the rotation efficiency, and reduce the energy consumption.

Description

Technical Field

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

[0002] Currently, in an outdoor unit of an air conditioner, generally a driving motor is used to drive an axial flow fan blade to rotate, so as to drive air flow to form a heat exchange air flow, thereby performing heat exchange on a condenser. However, currently the blades of the axial flow fan blade are directly fixedly connected to the circumferential surface of the inner hub. To ensure the connection strength, the diameter of the inner hub is usually made larger. However, in this way, the inner hub will have a certain influence on the air flow passing through the axial flow fan blade, reducing the air guiding effect, and will also increase the weight of the entire axial flow fan blade, resulting in a decrease in rotational efficiency and an increase in energy consumption. Summary of the Invention

[0003] The problem solved by the present invention is how to reduce the diameter of the inner hub while ensuring the connection strength, improve the air guiding effect, and reduce the weight of the axial flow fan blade, improve the rotational efficiency, and reduce the energy consumption.

[0004] To solve the above problems, the technical solution of the present invention is realized as follows:

[0005] In a first aspect, the present invention provides an axial flow fan blade, including an inner hub, an air guiding structure, and blades. The air guiding structure is arranged between the inner hub and the blades, and the inner hub is fixedly connected to the blades through the air guiding structure. The air guiding structure is used for guiding air. Compared with the prior art, the axial flow fan blade provided by the present invention can reduce the diameter of the inner hub while ensuring the connection strength, improve the air guiding effect, reduce the weight of the axial flow fan blade, improve the rotational efficiency, and reduce the energy consumption due to the adoption of the air guiding structure fixedly connected between the inner hub and the blades.

[0006] Further, the air guiding structure includes a main air guiding part and an auxiliary air guiding part. The main air guiding part is fixedly connected to the auxiliary air guiding part and is arranged at a preset included angle. Both the main air guiding part and the auxiliary air guiding part are fixedly connected to the circumferential surface of the inner hub, and the main air guiding part is connected to the blades. Both the main air guiding part and the auxiliary air guiding part are used for pressing air from the windward side to the leeward side to improve the air guiding effect.

[0007] Further, the air guiding structure further includes a lifting part. One side of the lifting part is fixedly connected to the main air guiding part, and the other side is fixedly connected to the blades. The lifting part is used for lifting the main air guiding part so that there is a height difference between the blades and the main air guiding part. Thus, the preset included angle between the main air guiding part and the auxiliary air guiding part is increased, and further the damage of the air guiding structure caused by excessive converging air flow is avoided.

[0008] Further, the lifting part is provided with a first end portion and a second end portion which are oppositely arranged, and the height of the first end portion is greater than the height of the second end portion. So that the structural shape of the main air guiding part conforms to the air flow dynamics and improves the air guiding effect.

[0009] Further, the first end portion is located on one side of a preset plane, and the second end portion is located on the other side of the preset plane. The preset plane is a plane perpendicular to the axis of the inner hub and passing through the midpoint of the inner hub, so that the main air guiding surface and the auxiliary air guiding surface can press air from the windward side to the leeward side, thereby improving the air guiding effect.

[0010] Further, the included angle range between the connection line between the midpoint of the inner hub and a point on the first end portion close to the main air guiding portion and the preset plane is 8.5 degrees to 22 degrees.

[0011] Further, the included angle range between the connection line between the midpoint of the inner hub and a point on the first end portion close to the blade and the preset plane is 20 degrees to 24 degrees.

[0012] Further, the main air guiding portion, the second end portion and the blade are flush. The included angle range between the connection line between the midpoint of the inner hub and the second end portion and the preset plane is 25 degrees to 32 degrees.

[0013] Further, the connection line between the main air guiding portion and the inner hub is provided with a first end point and a second end point oppositely. The first end point is arranged on the side of the second end point close to the auxiliary air guiding portion. Both the first end point and the second end point are located on one side of the preset plane. The preset plane is a plane perpendicular to the axis of the inner hub and passing through the midpoint of the inner hub, so that the main air guiding surface and the auxiliary air guiding surface can press air from the windward side to the leeward side, thereby improving the air guiding effect.

[0014] Further, the included angle range between the connection line between the midpoint of the inner hub and the first end point and the preset plane is 9 degrees to 18 degrees.

[0015] Further, the included angle range between the connection line between the midpoint of the inner hub and the second end point and the preset plane is 31 degrees to 36 degrees.

[0016] Further, the ratio range of the width of the blade in the radial direction of the inner hub to the width of the air guiding structure in the radial direction of the inner hub is 5.4 to 5.8. A reasonable ratio of the width of the blade and the air guiding structure in the radial direction of the inner hub can increase the area of the air guiding structure as much as possible while ensuring the connection strength, thereby improving the air guiding effect.

[0017] Further, the number of the air guiding structures and the blades are both multiple. The multiple air guiding structures are connected end to end and are all fixedly connected to the inner hub. The inner hub is disposed between the multiple air guiding structures. Each air guiding structure is fixedly connected to a blade. The multiple blades can ensure the air outlet effect, and the multiple air guiding structures can further improve the connection strength between the blade and the inner hub.

[0018] In a second aspect, the present invention provides an air conditioner, including the above-mentioned axial-flow fan blade. The axial-flow fan blade includes an inner hub, a wind guiding structure, and blades. The wind guiding structure is disposed between the inner hub and the blades. The inner hub is fixedly connected to the blades through the wind guiding structure, and the wind guiding structure is used for guiding air. The air conditioner can reduce the diameter of the inner hub while ensuring the connection strength, improve the air guiding effect, reduce the weight of the axial-flow fan blade, improve the rotation efficiency, and reduce the energy consumption. Description of the Drawings

[0019] Figure 1 is an axonometric view of the axial-flow fan blade according to the first embodiment of the present invention;

[0020] Figure 2 is Figure 1 a partial enlarged view of II in

[0021] Figure 3 is a top view of the axial-flow fan blade according to the first embodiment of the present invention;

[0022] Figure 4 is a front view of the axial-flow fan blade according to the first embodiment of the present invention.

[0023] Description of the Reference Numerals:

[0024] 100 - axial-flow fan blade; 110 - inner hub; 120 - wind guiding structure; 121 - main wind guiding part; 122 - auxiliary wind guiding part; 123 - lifting part; 124 - main wind guiding surface; 125 - auxiliary wind guiding surface; 126 - first end; 127 - second end; 130 - blade. Detailed Embodiments

[0025] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention is provided with reference to the accompanying drawings.

[0026] First Embodiment

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 . An axial-flow fan blade 100 provided by an embodiment of the present invention is used to drive air flow to form an air current. It can reduce the diameter of the inner hub 110 while ensuring the connection strength, improve the air guiding effect, reduce the weight of the axial-flow fan blade 100, improve the rotation efficiency, and reduce the energy consumption.

[0028] It should be noted that the axial-flow fan blade 100 is applied to an outdoor unit of an air conditioner (not shown in the figure). The outdoor unit of the air conditioner is installed outdoors and includes a condenser (not shown in the figure) and a driving motor (not shown in the figure). The driving motor is connected to the axial-flow fan blade 100 to drive the axial-flow fan blade 100 to rotate. While the axial-flow fan blade 100 is rotating, it will drive the air to flow to form a heat exchange air flow, and this heat exchange air flow can exchange heat with the condenser to ensure the normal operation of the condenser. However, it is not limited to this. In other embodiments, the axial-flow fan blade 100 can also be applied to an electric fan, and the application scenarios of the axial-flow fan blade 100 are not specifically limited.

[0029] The axial-flow fan blade 100 includes an inner hub 110, a wind guiding structure 120, and blades 130. The wind guiding structure 120 is arranged between the inner hub 110 and the blades 130. The inner hub 110 is fixedly connected to the blades 130 through the wind guiding structure 120. The inner hub 110 is used to be connected to the driving motor. The wind guiding structure 120 can improve the connection strength between the blades 130 and the inner hub 110, fix the relative positions of the blades 130 and the inner hub 110, and prevent the blades 130 from displacing relative to the inner hub 110. When the axial-flow fan blade 100 rotates in a preset direction, the axial-flow fan blade 100 has a windward side and a leeward side. The air flow generated by the rotation of the axial-flow fan blade 100 flows from the windward side to the leeward side. The wind guiding structure 120 is used to guide the air to press the air towards the leeward side to improve the wind guiding effect.

[0030] It is worth noting that the wind guiding structure 120 fixedly connects the inner hub 110 and the blades 130. The wind guiding structure 120 can improve the connection strength between the blades 130 and the inner hub 110 to reduce the diameter of the inner hub 110, reduce the weight of the entire axial-flow fan blade 100, make the axial-flow fan blade 100 achieve lightweight, improve the rotation efficiency, and reduce the energy consumption. The wind guiding structure 120 can also guide the air and press the air from the windward side to the leeward side to improve the wind guiding effect.

[0031] It should be noted that the number of the wind guiding structures 120 and the blades 130 is multiple. The multiple wind guiding structures 120 are connected end to end and are all fixedly connected to the inner hub 110. The inner hub 110 is surrounded by the multiple wind guiding structures 120. Each wind guiding structure 120 is fixedly connected to a blade 130. The multiple blades 130 can ensure the air outlet effect, and the multiple wind guiding structures 120 can further improve the connection strength between the blades 130 and the inner hub 110. In this embodiment, the number of the wind guiding structures 120 and the blades 130 is three each, but it is not limited to this. In other embodiments, the number of the wind guiding structures 120 and the blades 130 can be four each, or can be five each. The number of the wind guiding structures 120 and the blades 130 is not specifically limited.

[0032] Further, the ratio range of the width of the blade 130 in the radial direction of the inner hub 110 to the width of the air guiding structure 120 in the radial direction of the inner hub 110 is 5.4 to 5.8. A reasonable ratio of the widths of the blade 130 and the air guiding structure 120 in the radial direction of the inner hub 110 can increase the area of the air guiding structure 120 as much as possible while ensuring the connection strength, thereby improving the air guiding effect. For ease of understanding, the width of the blade 130 in the radial direction of the inner hub 110 is denoted as a, and the width of the air guiding structure 120 in the radial direction of the inner hub 110 is denoted as b.

[0033] In this embodiment, the ratio of the width of the blade 130 in the radial direction of the inner hub 110 to the width of the air guiding structure 120 in the radial direction of the inner hub 110 is 5.5, but it is not limited thereto. In other embodiments, the ratio of the width of the blade 130 in the radial direction of the inner hub 110 to the width of the air guiding structure 120 in the radial direction of the inner hub 110 can be 5.4 or 5.8. There is no specific limitation on the ratio of the width of the blade 130 in the radial direction of the inner hub 110 to the width of the air guiding structure 120 in the radial direction of the inner hub 110.

[0034] The air guiding structure 120 includes a main air guiding part 121, an auxiliary air guiding part 122, and a lifting part 123. The main air guiding part 121 is fixedly connected to the auxiliary air guiding part 122 and is arranged at a preset angle, that is, the main air guiding part 121 and the auxiliary air guiding part 122 are arranged in a V shape. Both the main air guiding part 121 and the auxiliary air guiding part 122 are fixedly connected to the circumferential surface of the inner hub 110. The main air guiding part 121 is connected to the blade 130 through the lifting part 123. Both the main air guiding part 121 and the auxiliary air guiding part 122 are used to press air from the windward side to the leeward side to improve the air guiding effect. The lifting part 123 can make a transition between the main air guiding part 121 and the blade 130, so that air can flow smoothly between the main air guiding part 121 and the blade 130, avoiding air flow disorder. In this embodiment, the main air guiding part 121, the auxiliary air guiding part 122, and the lifting part 123 are integrally formed. The main air guiding part 121 of each air guiding structure 120 is fixedly connected to the auxiliary air guiding part 122 of an adjacent air guiding structure 120 to improve the connection strength.

[0035] In this embodiment, the main air guiding part 121 is provided with a main air guiding surface 124, and the auxiliary air guiding part 122 is provided with an auxiliary air guiding surface 125. Both the main air guiding surface 124 and the auxiliary air guiding surface 125 are curved surfaces and are both located on the windward side. During the rotation of the axial flow fan blade 100 in the preset direction, air flows along the main air guiding surface 124 and the auxiliary air guiding surface 125. Both the main air guiding surface 124 and the auxiliary air guiding surface 125 are used to press air from the windward side to the leeward side, and the air guiding effect is good.

[0036] In this embodiment, the blade 130 is sickle-shaped, and the surface of the blade 130 is a curved surface, so that the structural shape of the blade 130 conforms to aerodynamics, and the air guiding effect is good.

[0037] It should be noted that one side of the lifting part 123 is fixedly connected to the main wind guiding part 121, and the other side is fixedly connected to the blade 130. The lifting part 123 is used to lift the main wind guiding part 121 so that there is a height difference between the blade 130 and the main wind guiding part 121, thereby increasing the preset angle between the main wind guiding part 121 and the auxiliary wind guiding part 122, and further avoiding damage to the wind guiding structure 120 caused by excessive converging air flow.

[0038] Furthermore, the lifting part 123 is provided with a first end 126 and a second end 127 oppositely. The height of the first end 126 is greater than the height of the second end 127, that is, the height difference between the blade 130 and the main wind guiding part 121 connected to the first end 126 is greater than the height difference between the blade 130 and the main wind guiding part 121 connected to the second end 127, so that the structural shape of the main wind guiding part 121 conforms to aerodynamics and improves the wind guiding effect.

[0039] It is worth noting that the midpoint of the inner hub 110 is named point O, and the plane perpendicular to the axis of the inner hub 110 and passing through the midpoint of the inner hub 110 is named the preset plane. The lifting part 123 is arranged obliquely to the preset plane. The first end 126 is located on one side of the preset plane, and the second end 127 is located on the other side of the preset plane to improve the wind guiding effect of the main wind guiding part 121.

[0040] In this embodiment, the axial flow fan blade 100 is placed flat on the horizontal plane so that the windward side of the axial flow fan blade 100 faces upward and the leeward side faces downward. At this time, the preset plane is located on the horizontal plane. The first end 126 is located below the preset plane, and the second end 127 is located above the preset plane, that is, the first end 126 is arranged close to the leeward side, and the second end 127 is arranged close to the windward side. In this way, the main wind guiding surface 124 intersects with the preset plane. The side of the main wind guiding surface 124 close to the first end 126 is located below the preset plane and close to the leeward side, and the side of the main wind guiding surface 124 close to the second end 127 is located above the preset plane and close to the windward side. When the axial flow fan blade 100 rotates in the preset direction, air flows from the side of the main wind guiding surface 124 close to the second end 127 to the side of the main wind guiding surface 124 close to the first end 126, that is, the main wind guiding surface 124 can press the air from the windward side to the leeward side to improve the wind guiding effect.

[0041] Furthermore, the auxiliary air guiding part 122 is arranged on one side of the main air guiding part 121 close to the first end part 126. Since the main air guiding part 121 and the auxiliary air guiding part 122 are arranged at a preset angle, the auxiliary air guiding surface 125 intersects with the preset plane. The side of the auxiliary air guiding surface 125 away from the main air guiding part 121 is located above the preset plane and close to the windward side, and the side of the auxiliary air guiding surface 125 close to the main air guiding part 121 is located below the preset plane and close to the leeward side. When the axial flow fan blade 100 rotates along the preset direction, air flows from the side of the auxiliary air guiding surface 125 away from the main air guiding part 121 to the side of the auxiliary air guiding surface 125 close to the main air guiding part 121, that is, the auxiliary air guiding surface 125 can press air from the windward side to the leeward side to improve the air guiding effect.

[0042] It should be noted that a point on the first end part 126 close to the main air guiding part 121 is named point B, and a point on the first end part 126 close to the blade 130 is named point E. Both point B and point E are located below the preset plane. The included angle between the connection line OB between the midpoint O of the inner hub 110 and point B on the first end part 126 close to the main air guiding part 121 and the preset plane ranges from 8.5 degrees to 22 degrees. The included angle between the connection line OE between the midpoint O of the inner hub 110 and point E on the first end part 126 close to the blade 130 and the preset plane ranges from 20 degrees to 24 degrees.

[0043] In this embodiment, the included angle between the connection line OB between the midpoint O of the inner hub 110 and point B on the first end part 126 close to the main air guiding part 121 and the preset plane is 9.63 degrees, but it is not limited to this. In other embodiments, the included angle between the connection line OB between the midpoint O of the inner hub 110 and point B on the first end part 126 close to the main air guiding part 121 and the preset plane can be 8.5 degrees or 22 degrees, and the included angle between the connection line OB between the midpoint O of the inner hub 110 and point B on the first end part 126 close to the main air guiding part 121 and the preset plane is not specifically limited.

[0044] In this embodiment, the included angle between the connection line OE between the midpoint O of the inner hub 110 and point E on the first end part 126 close to the blade 130 and the preset plane is 22.5 degrees, but it is not limited to this. In other embodiments, the included angle between the connection line OE between the midpoint O of the inner hub 110 and point E on the first end part 126 close to the blade 130 and the preset plane can be 20 degrees or 24 degrees, and the included angle between the connection line OE between the midpoint O of the inner hub 110 and point E on the first end part 126 close to the blade 130 and the preset plane is not specifically limited.

[0045] Further, the main wind guiding part 121, the second end part 127 and the blade 130 are flush with each other, that is, the height of the second end part 127 is 0, and the height difference between the blade 130 connected to the second end part 127 and the main wind guiding part 121 is 0. Regarding the second end part 127 as a point, the main wind guiding part 121, the second end part 127 and the blade 130 intersect at this point. Name the point where the second end part 127 is located as point D, and point D is above the preset plane. The included angle range between the connection line OD between the midpoint O of the inner hub 110 and the second end part 127 and the preset plane is 25 degrees to 32 degrees.

[0046] In this embodiment, the included angle between the connection line OD between the midpoint O of the inner hub 110 and the second end part 127 and the preset plane is 28.23 degrees, but it is not limited thereto. In other embodiments, the included angle between the connection line OD between the midpoint O of the inner hub 110 and the second end part 127 and the preset plane can be 25 degrees or 32 degrees, and no specific limitation is imposed on the included angle between the connection line OD between the midpoint O of the inner hub 110 and the second end part 127 and the preset plane.

[0047] It should be noted that the connection line between the main wind guiding part 121 and the inner hub 110 is provided with a first end point and a second end point relatively. The first end point is arranged on the side of the second end point close to the auxiliary wind guiding part 122, that is, the first end point is arranged close to the auxiliary wind guiding part 122, and the second end point is arranged away from the auxiliary wind guiding part 122. Both the first end point and the second end point are on one side of the preset plane. Name the first end point as point A and the second end point as point C. Both point A and point C are above the preset plane. The included angle range between the connection line OA between the midpoint O of the inner hub 110 and the first end point A and the preset plane is 9 degrees to 18 degrees. The included angle range between the connection line OC between the midpoint O of the inner hub 110 and the second end point C and the preset plane is 31 degrees to 36 degrees.

[0048] In this embodiment, the included angle between the connection line OA between the midpoint O of the inner hub 110 and the first end point A and the preset plane is 16.45 degrees, but it is not limited thereto. In other embodiments, the included angle between the connection line OA between the midpoint O of the inner hub 110 and the first end point A and the preset plane can be 9 degrees or 18 degrees, and no specific limitation is imposed on the included angle between the connection line OA between the midpoint O of the inner hub 110 and the first end point A and the preset plane.

[0049] In this embodiment, the included angle between the connection line OC between the midpoint O of the inner hub 110 and the second end point C and the preset plane is 31.31 degrees, but it is not limited thereto. In other embodiments, the included angle between the connection line OC between the midpoint O of the inner hub 110 and the second end point C and the preset plane can be 31 degrees or 36 degrees, and no specific limitation is imposed on the included angle between the connection line OC between the midpoint O of the inner hub 110 and the second end point C and the preset plane.

[0050] In the embodiment of the present invention, for the axial flow fan blade 100, the air guiding structure 120 is arranged between the inner hub 110 and the blade 130. The inner hub 110 is fixedly connected to the blade 130 through the air guiding structure 120, and the air guiding structure 120 is used for guiding air. Compared with the prior art, since the axial flow fan blade 100 provided by the present invention adopts the air guiding structure 120 fixedly connected between the inner hub 110 and the blade 130, it can reduce the diameter of the inner hub 110 while ensuring the connection strength, improve the air guiding effect, reduce the weight of the axial flow fan blade 100, improve the rotation efficiency, and reduce the energy consumption.

[0051] Second Embodiment

[0052] The present invention provides an air conditioner (not shown in the figure) for regulating the indoor temperature. The air conditioner includes an axial flow fan blade 100, a driving motor, and a condenser. Among them, the basic structure, principle, and technical effects generated by the axial flow fan blade 100 are the same as those in 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.

[0053] In this embodiment, the air conditioner includes an outdoor unit and an indoor unit (not shown in the figure). The outdoor unit of the air conditioner is connected to the indoor unit to jointly realize the functions of cooling or heating the room. The outdoor unit of the air conditioner includes an axial flow fan blade 100, a condenser, and a driving motor. The driving motor is connected to the axial flow fan blade 100 to drive the axial flow fan blade 100 to rotate. While rotating, the axial flow fan blade 100 will drive the air to flow to form a heat exchange air flow, and this heat exchange air flow can exchange heat with the condenser to ensure the normal operation of the condenser.

[0054] The beneficial effects of the air conditioner described in the embodiment of the present invention are the same as those of the first embodiment, and will not be elaborated here.

[0055] 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 fan blade, characterized in that, It includes an inner hub (110), a wind guiding structure (120) and blades (130). The wind guiding structure (120) is arranged between the inner hub (110) and the blades (130). The inner hub (110) is fixedly connected to the blades (130) through the wind guiding structure (120). The wind guiding structure (120) is used for guiding air. The wind guiding structure (120) includes a main wind guiding part (121) and an auxiliary wind guiding part (122). The main wind guiding part (121) is fixedly connected to the auxiliary wind guiding part (122) and is arranged at a preset angle. Both the main wind guiding part (121) and the auxiliary wind guiding part (122) are fixedly connected to the circumferential surface of the inner hub (110). The main wind guiding part (121) is connected to the blades (130). The wind guiding structure (120) further includes a lifting part (123). One side of the lifting part (123) is fixedly connected to the main wind guiding part (121), and the other side is fixedly connected to the blades (130). The lifting part (123) is used for lifting the main wind guiding part (121) so that there is a height difference between the blades (130) and the main wind guiding part (121). There are a first end point and a second end point oppositely arranged on the connection line between the main wind guiding part (121) and the inner hub (110). The first end point is arranged on the side of the second end point closer to the auxiliary wind guiding part (122). Both the first end point and the second end point are on one side of a preset plane. The preset plane is a plane perpendicular to the axis of the inner hub (110) and passing through the midpoint of the inner hub (110). The ratio range of the width of the blades (130) in the radial direction of the inner hub (110) to the width of the wind guiding structure (120) in the radial direction of the inner hub (110) is 5.4 to 5.

8.

2. The axial flow fan blade according to claim 1, characterized in that, The lifting part (123) has a first end part (126) and a second end part (127) oppositely arranged. The height of the first end part (126) is greater than the height of the second end part (127).

3. The axial flow fan blade according to claim 2, characterized in that, The first end part (126) is on one side of the preset plane, and the second end part (127) is on the other side of the preset plane. The preset plane is a plane perpendicular to the axis of the inner hub (110) and passing through the midpoint of the inner hub (110).

4. The axial flow fan blade according to claim 3, characterized in that, The included angle range between the connection line between the midpoint of the inner hub (110) and a point on the first end part (126) close to the main wind guiding part (121) and the preset plane is 8.5 degrees to 22 degrees.

5. The axial flow fan blade according to claim 3, characterized in that, The included angle range between the connection line between the midpoint of the inner hub (110) and a point on the first end part (126) close to the blades (130) and the preset plane is 20 degrees to 24 degrees.

6. The axial flow fan blade according to claim 3, characterized in that, The main wind guiding part (121), the second end part (127) and the blades (130) are flush. The included angle range between the connection line between the midpoint of the inner hub (110) and the second end part (127) and the preset plane is 25 degrees to 32 degrees.

7. The axial flow fan blade according to claim 1, characterized in that, The included angle between the line connecting the midpoint of the inner hub (110) and the first endpoint and the preset plane ranges from 9 degrees to 18 degrees.

8. The axial flow fan blade according to claim 1, characterized in that, The included angle between the line connecting the midpoint of the inner hub (110) and the second endpoint and the preset plane ranges from 31 degrees to 36 degrees.

9. The axial flow fan blade according to claim 1, characterized in that, The number of the air guiding structures (120) and the blades (130) is multiple. The multiple air guiding structures (120) are connected end to end and are all fixedly connected to the inner hub (110). The inner hub (110) is disposed around the multiple air guiding structures (120), and each air guiding structure (120) is fixedly connected to one blade (130).

10. An air conditioner, characterized in that, It includes the axial flow fan blade according to any one of claims 1 to 9.

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