Axial flow fan blade, fan, air conditioner outdoor unit and air conditioner

Abstract

The present disclosure relates to an axial flow fan blade, a fan, an air conditioner outdoor unit and an air conditioner, the axial flow fan blade comprising a blade, the blade comprising a blade leading edge and a blade trailing edge oppositely arranged, the blade trailing edge being provided with a notch recessed towards the blade leading edge; a reinforcing portion is arranged on the part of the blade for surrounding the notch, the reinforcing portion being used to increase the strength of the part of the blade for surrounding the notch. Through the above technical solution, the axial flow fan blade provided by the present disclosure can reduce the energy consumption of the fan while improving the stability during operation.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, specifically to an axial flow fan blade, a fan, an outdoor air conditioning unit, and an air conditioner. Background Technology

[0002] Axial fan blades are an important component of fans, used in equipment with heat dissipation requirements such as air conditioners and refrigerators. However, in related technologies, axial fan blades are relatively heavy, increasing the energy consumption of the fan. Utility Model Content

[0003] The purpose of this disclosure is to provide an axial flow fan blade, a fan, an outdoor air conditioning unit, and an air conditioner, wherein the axial flow fan blade can reduce the energy consumption of the fan while improving its own stability during operation.

[0004] To achieve the above objectives, this disclosure provides an axial flow fan blade, the axial flow fan blade including a blade, the blade including a blade leading edge and a blade trailing edge disposed opposite to each other, the blade trailing edge being provided with a notch recessed toward the blade leading edge; the portion of the blade used to surround the notch is provided with a reinforcing portion, the reinforcing portion being used to increase the strength of the portion surrounding the notch.

[0005] Optionally, the blade has a windward side and a leeward side arranged opposite to each other, and the reinforcing part is constructed as a protrusion on the windward side.

[0006] Optionally, the protrusion has an outer wall surface that protrudes from the windward surface, and the outer wall surface is connected to and smoothly transitions with the windward surface.

[0007] Optionally, the angle between the outer wall surface and the windward surface gradually decreases from the trailing edge of the blade to the leading edge of the blade.

[0008] Optionally, the protrusion is integrally formed with the blade.

[0009] Optionally, the height of the protrusion protruding from the windward surface is 0.5mm-1.0mm.

[0010] Optionally, at least a portion of the trailing edge of the blade is serrated.

[0011] Optionally, the blade is provided with a weight-reducing portion, the weight-reducing portion including a recess formed in the blade, the blade having a blade tip and a blade root disposed opposite to each other, and the recess being disposed between the blade tip and the blade root.

[0012] Optionally, the leaf tip has an outer edge surface, and the recess is spaced 8mm-10mm from the outer edge surface; and / or, the leaf root has an inner edge surface, and the recess is spaced 15mm-18mm from the inner edge surface.

[0013] Optionally, the blade includes a windward surface, and the windward surface is provided with the recess, the depth of which is 0.5mm-1.0mm.

[0014] Based on the above technical solutions, this disclosure also provides a fan, which includes the axial flow fan blades described above.

[0015] Based on the above technical solution, this disclosure also provides an air conditioner outdoor unit, which includes the aforementioned axial flow fan blades.

[0016] Based on the above technical solutions, this disclosure also provides an air conditioner, which includes the aforementioned axial flow fan blades.

[0017] Through the above technical solution, the axial flow fan blade provided in this disclosure has a notch at the trailing edge facing the leading edge. This reduces the weight of the blade itself, meeting the requirements for lightweight blade design. This not only reduces the energy consumption of the fan but also reduces the material required for axial flow fan blade molding, thereby lowering costs. Furthermore, a reinforcing section is provided at the portion of the blade surrounding the notch to increase the structural strength of the blade near the notch. During operation, this prevents blade vibration due to insufficient strength near the notch, improving blade stability at high speeds and avoiding noise and abnormal sounds.

[0018] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the axial flow fan blade provided in the embodiments of this disclosure;

[0021] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0022] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle;

[0023] Figure 4 yes Figure 1 A magnified view of a portion of point C in the middle;

[0024] Figure 5 This is another structural schematic diagram of the axial flow fan blade provided in this embodiment;

[0025] Figure 6 yes Figure 5 A magnified view of a portion of point D in the middle;

[0026] Figure 7 This is the first embodiment of the reinforcement provided in this disclosure;

[0027] Figure 8 This is the second embodiment of the reinforcement provided in this disclosure;

[0028] Figure 9 This is the third embodiment of the reinforcement provided in this disclosure.

[0029] Explanation of reference numerals in the attached figures

[0030] 1-Blade; 11-Leading edge of blade; 12-Leading edge of blade; 13-Windward side; 14-Leftward side; 15-Blade tip; 151-Outer edge surface; 16-Blade root; 161-Inner edge surface; 2-Notch; 3-Reinforcing part; 31-Outer wall surface; 4-Weight reduction part; 5-Hub. Detailed Implementation

[0031] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0032] In this disclosure, unless otherwise stated, the terms "blade leading edge" and "blade trailing edge" as used herein refer to the opposing leading and trailing edges of the blade along its direction of rotation when it rotates; "blade tip" and "blade root" refer to the opposing top and bottom edges of the blade in its radial direction; and "windward side" and "leeward side" refer to the opposing two surfaces of an axial flow fan blade in its axial direction during operation, wherein the surface in contact with the airflow is the windward side, and the other side is the leeward side. Furthermore, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting the present disclosure.

[0033] Based on the specific embodiments provided in this disclosure, refer to Figures 1 to 9 As shown, an axial flow fan blade is provided. The axial flow fan blade includes a blade 1. The blade 1 includes a blade leading edge 11 and a blade trailing edge 12 disposed opposite to each other. The blade trailing edge 12 is provided with a notch 2 that is recessed toward the blade leading edge 11. The portion of the blade 1 that surrounds the notch 2 is provided with a reinforcing portion 3, which is used to increase the strength of the portion surrounding the notch 2.

[0034] Through the above technical solution, in the axial flow fan blade provided in this disclosure, the trailing edge 12 of the blade is provided with a notch 2 facing the leading edge 11 of the blade. This reduces the weight of the blade 1, meeting the lightweight design requirements of the blade 1. This not only reduces the operating energy consumption of the fan but also reduces the material required for the axial flow fan blade molding, thereby reducing costs. A reinforcing part 3 is provided at the portion of the blade 1 surrounding the notch 2 to increase the structural strength of the blade 1 near the notch 2. During the operation of the axial flow fan blade, this prevents the blade 1 from vibrating due to insufficient strength near the notch 2, improves the stability of the blade 1 during high-speed rotation, and avoids abnormal noise.

[0035] In the axial flow fan blades provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 2 As shown, the blade 1 has a windward side 13 and a leeward side 14 arranged opposite to each other, and the reinforcing part 3 can be constructed as a protrusion provided on the windward side 13. Since the blade 1 is usually a thin plate-like part, the provision of the protrusion increases the bending strength of the blade 1 by adjusting the cross-sectional shape of the blade 1 at the notch 2. When the axial flow fan blade rotates at high speed, it can prevent the blade 1 from becoming unstable and vibrating, thereby improving the overall stability of the axial flow fan blade. In this disclosure, the protrusion is formed by a portion of the blade 1 protruding towards the windward side 13. Compared with directly providing protrusions on the blade 1, the structural strength of the blade 1 near the notch 2 can be significantly improved with the same or slightly increased material usage.

[0036] In some other embodiments, the reinforcing part 3 may also be configured as a reinforcing rib provided at the part of the blade 1 that forms the notch 2. The reinforcing rib may extend radially toward the inside of the blade 1 with the notch 2 as the center, which can also enhance the strength of the structure of the blade 1 at the notch 2. This disclosure does not make any specific limitation in this regard.

[0037] In the axial flow fan blades provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 2 As shown, the protrusion has an outer wall surface 31 that protrudes from the windward surface 13, and the outer wall surface 31 can be connected to the windward surface 13 with a smooth transition. Thus, when the axial flow fan blades rotate at high speed, the airflow impacts the windward surface 13 of the blade 1 and flows along the rotation direction of the blade 1 towards the trailing edge 12 of the blade until it contacts the outer wall surface 31 of the protrusion. The smooth transition between the outer wall surface 31 and the windward surface 13 reduces the wind resistance of the fan blade rotation, thereby reducing the fan's energy consumption. Furthermore, it prevents the airflow from impacting the blade 1 at the protrusion and forming vortices, which could lead to blade vibration and noise. Additionally, since axial flow fan blades are typically manufactured using injection molding, the smooth transition design also improves the smoothness of the injection molding process, preventing weld lines caused by poor injection.

[0038] Based on the above embodiments, as an exemplary embodiment, refer to Figure 2 and Figure 7 As shown, the angle between the outer wall surface 31 and the windward surface 13 can gradually decrease from the trailing edge 12 to the leading edge 11 of the blade. In this way, the outer wall surface 31 can form an arc-shaped transition surface with the windward surface 13 that is concave towards the leeward surface 14, so as to minimize the wind resistance at the protrusion.

[0039] In some other embodiments, reference is made to Figure 8 As shown, the angle between the outer wall surface 31 and the windward surface 13 in the direction from the trailing edge 12 to the leading edge 11 of the blade can remain unchanged. In this case, the raised outer wall surface 31 is formed as a slope with a flat plate shape. Alternatively, in some other embodiments, refer to... Figure 9 As shown, the angle between the outer wall surface 31 and the windward surface 13 can also gradually increase along the direction from the trailing edge 12 of the blade to the leading edge 11 of the blade. In this case, the raised outer wall surface 31 is formed as an arc-shaped transition surface protruding towards the windward surface 13, which can achieve the purpose of reducing wind resistance. This disclosure does not impose any specific limitations on this.

[0040] In the axial flow fan blade provided in this disclosure, as an exemplary embodiment, the protrusion and the blade 1 can be integrally formed. This not only improves the overall integrity of the blade 1 and increases its structural strength, but also, since the blade 1 is usually manufactured using processes such as injection molding, the integral forming of the protrusion and the blade 1 can facilitate the improvement of the processing efficiency of the blade 1.

[0041] The protrusion can be constructed to any suitable size depending on the actual size of the axial flow fan blade; this disclosure does not impose any specific limitation on this. As an exemplary embodiment, the height of the protrusion protruding from the windward surface 13 can be 0.5mm-1.0mm, such as 0.6mm, 0.7mm, 0.8mm, 0.9mm, etc.; this disclosure does not impose any specific limitation on this. In this disclosure, the windward surface 13 is also provided with a recess, thereby creating a height difference between the edge of the blade 1 and the recess. The height of the protrusion provided on the windward surface 13 can also be designed according to the height of the edge of the blade 1. Specifically, the height of the protrusion can be greater than or equal to the height of the edge of the blade 1; this disclosure does not impose any specific limitation on this.

[0042] In the axial flow fan blades provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 4 As shown, at least a portion of the trailing edge 12 of the blade can be constructed as a serrated shape. This allows for sufficient dispersion of the impacting airflow at the trailing edge 12 of the blade, effectively reducing the noise generated when the fast airflows on the windward side 13 and the leeward side 14 collide at the trailing edge 12 of the blade, and further reducing the noise during wind turbine operation.

[0043] In the axial flow fan blades provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 5 and Figure 6 As shown, the blade 1 may be provided with a weight-reducing portion 4, which may include a recess formed in the blade 1. The blade 1 has a blade tip 15 and a blade root 16 disposed opposite to each other, and the recess may be disposed between the blade tip 15 and the blade root 16. The recess can effectively reduce the weight of the blade 1, thereby reducing the material required for axial flow fan blade forming, thus reducing costs, and also reducing the operating energy consumption of the fan and improving the operating efficiency of the air conditioner outdoor unit. The blade 1 is connected to the hub 5. The outer edge surface 151 is the edge surface of the blade 1 away from the hub 5, and correspondingly, the inner edge surface 161 is the edge surface of the blade 1 closer to the hub 5, as detailed below. Figure 1 As shown in the image.

[0044] The recess can be positioned at any suitable location on the blade 1, and this disclosure does not impose specific limitations thereon. As an exemplary embodiment, refer to... Figure 2 and Figure 3 As shown, the blade tip 15 has an outer edge surface 151, and the recess is spaced from the outer edge surface 151 (see reference). Figure 2 As shown in D1, the diameter can be 8mm-10mm, such as 8.5mm, 8.7mm, 9.0mm, 9.5mm, 9.7mm, etc., and / or, the leaf root 16 has an inner edge surface 161, and the spacing between the recess and the inner edge surface 161 (see reference). Figure 2 The diameter (as shown in D2) can be 15mm-18mm, such as 15.5mm, 16.0mm, 16.5mm, 17.0mm, 17.5mm, etc. There is a distance between the recess and the outer edge surface 151 of the blade tip 15, allowing a stepped surface to be formed between them. When the airflow impacts the blade 1, it flows radially along the blade 1 under the high-speed rotation of the blade 1 until it adheres to the stepped surface, and then flows towards the trailing edge 12 of the blade. This allows the airflow to be dispersed at the trailing edge 12 by the serrated structure, further improving the stability of the blade 1's rotation and reducing the noise generated by the fan.

[0045] The depth of the recess can be configured to any suitable size, and this disclosure does not impose any specific limitations on it. As an exemplary embodiment, refer to... Figure 6 As shown, the blade 1 includes a windward surface 13, and a recess may be provided on the windward surface 13, the depth of which is (refer to...) Figure 6 The depth of the recess (as shown in the middle) can be 0.5mm-1.0mm, such as 0.6mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, etc. In this disclosure, the depth of the recess is 0.8mm, so as to reduce the weight of the blade 1 as much as possible while ensuring the strength of the blade 1, thereby reducing the energy consumption of the fan.

[0046] Based on the above technical solutions, this disclosure also provides a fan, which includes the aforementioned axial flow fan blade. This axial flow fan blade possesses all the technical features of the aforementioned axial flow fan blade, which will not be elaborated upon here.

[0047] Based on the above technical solutions, this disclosure also provides an air conditioner outdoor unit, which includes the aforementioned axial flow fan blades. These axial flow fan blades possess all the technical features of the aforementioned axial flow fan blades, which will not be elaborated upon here.

[0048] Based on the above technical solutions, this disclosure also provides an air conditioner that includes the aforementioned axial flow fan blade. This axial flow fan blade possesses all the technical features of the aforementioned axial flow fan blade, which will not be elaborated upon here.

[0049] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0051] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An axial flow fan blade, characterized in that, The axial flow fan blade includes a blade, the blade includes a leading edge and a trailing edge disposed opposite to each other, and the trailing edge of the blade is provided with a notch that is recessed toward the leading edge of the blade; The portion of the blade that forms the notch is provided with a reinforcing part, which increases the strength of the portion forming the notch.

2. The axial flow fan blade according to claim 1, characterized in that, The blade has a windward side and a leeward side that are arranged opposite to each other, and the reinforcing part is a protrusion provided on the windward side.

3. The axial flow fan blade according to claim 2, characterized in that, The protrusion has an outer wall surface that protrudes from the windward surface, and the outer wall surface is connected to the windward surface and smoothly transitions.

4. The axial flow fan blade according to claim 3, characterized in that, From the trailing edge of the blade to the leading edge of the blade, the angle between the outer wall surface and the windward surface gradually decreases.

5. The axial flow fan blade according to claim 2, characterized in that, The protrusion is integrally formed with the blade.

6. The axial flow fan blade according to any one of claims 2-5, characterized in that, The protrusion protrudes 0.5mm-1.0mm above the windward surface.

7. The axial flow fan blade according to claim 1, characterized in that, At least a portion of the trailing edge of the blade is serrated.

8. The axial flow fan blade according to claim 1, characterized in that, The blade is provided with a weight-reducing part, the weight-reducing part including a recess formed in the blade, the blade having a blade tip and a blade root disposed opposite to each other, and the recess being disposed between the blade tip and the blade root.

9. The axial flow fan blade according to claim 8, characterized in that, The leaf tip has an outer edge surface, and the recess is spaced 8mm-10mm from the outer edge surface; and / or, the leaf root has an inner edge surface, and the recess is spaced 15mm-18mm from the inner edge surface.

10. The axial flow fan blade according to claim 8, characterized in that, The blade includes a windward surface, and the windward surface is provided with the recess, the depth of which is 0.5mm-1.0mm.

11. A fan, characterized in that, Includes the axial flow fan blade as described in any one of claims 1-10.

12. An outdoor unit for an air conditioner, characterized in that, The outdoor unit of the air conditioner includes axial flow fan blades according to any one of claims 1-10.

13. An air conditioner, characterized in that, The air conditioner includes axial flow fan blades according to any one of claims 1-10.

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