Bionic impeller and centrifugal fan of automobile air conditioner

Abstract

The invention relates to the technical field of automobile air conditioners, in particular to a bionic impeller and a centrifugal fan of an automobile air conditioner. The bionic impeller of the automobile air conditioner comprises a hub, the blades are arranged at intervals in the circumferential direction of the hub; each blade comprises a blade body and at least one columnar bulge; in each blade, in the circumferential direction of the hub, a blade body is provided with an inner side wall and an outer side wall which are opposite, and the inner side wall protrudes towards the outer side wall so that the blade body can be bent into an arc shape. In each blade, the columnar protrusions are arranged on the inner side wall of the blade body, and the columnar protrusions extend in the direction parallel to the central axis of the hub. In this way, turbulent vortexes between the fan blades can be restrained and eliminated, the noise performance of the air blower is improved, and the whole vehicle NVH performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air conditioners, and in particular to an automobile air conditioner bionic impeller and a centrifugal fan. Background Art

[0002] The fan of the automotive air conditioning system will produce obvious turbulent vortices near the tongue area while meeting the flow demand and generating pressure. As the vehicle's requirements for automotive air conditioning air volume continue to increase, the noise problem of the air conditioning blower has become increasingly apparent, and as the impeller speed increases, the noise problem becomes more serious.

[0003] Especially in the current era of rapid development of new energy vehicles, it puts forward more stringent performance requirements for the NVH of the whole vehicle. Under many working conditions of the whole vehicle, the noise of the car air conditioner is the main noise source of new energy vehicles. The blower noise directly affects the comfort of the members, and the noise problem needs to be solved urgently. Summary of the invention

[0004] The objects of the present invention include, for example, providing a bionic impeller and centrifugal fan for an automobile air conditioner, which can suppress and eliminate turbulent vortices between the fan blades, thereby improving the noise performance of the blower and improving the NVH performance of the entire vehicle.

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

[0006] In a first aspect, the present invention provides a bionic impeller for an automobile air conditioner, comprising:

[0007] Wheel hub;

[0008] and a plurality of blades spaced circumferentially around the hub;

[0009] The blade comprises a body and at least one columnar protrusion;

[0010] In each of the blades, along the circumferential direction of the hub, the blade body has an inner side wall and an outer side wall opposite to each other, and the inner side wall protrudes toward the outer side wall so that the blade body is bent into an arc shape;

[0011] In each of the blades, the columnar protrusion is arranged on the inner side wall of the blade body, and the columnar protrusion extends in a direction parallel to the central axis of the hub.

[0012] In an optional embodiment, along the central axis of the hub, the columnar protrusion of each blade extends from the top of the sheet body to the bottom of the sheet body.

[0013] In an optional embodiment, along the circumferential direction of the hub, the thickness of the columnar protrusion is less than or equal to the thickness along the sheet body.

[0014] In an optional embodiment, along the circumferential direction of the hub, a surface of the columnar protrusion facing away from the inner side wall is arc-shaped.

[0015] In an optional embodiment, the columnar protrusion is semi-cylindrical.

[0016] In an optional embodiment, in each of the blades, when the blade includes a plurality of the columnar protrusions, the plurality of the columnar protrusions are arranged on the blade body along a radial direction of the hub.

[0017] In an optional embodiment, in each of the blades, a plurality of the columnar protrusions are evenly distributed on the blade body along the radial direction of the hub.

[0018] In an optional embodiment, the number of the columnar protrusions on the blade is 1-3.

[0019] In an optional embodiment, in each of the blades, along the radial direction of the hub, the columnar protrusion maintains a distance from the radial outer wall and the radial inner wall of the blade body.

[0020] In a second aspect, the present invention provides a centrifugal fan, comprising the automotive air-conditioning bionic impeller described in any one of the aforementioned embodiments.

[0021] The beneficial effects of the embodiments of the present invention include, for example:

[0022] The automotive air-conditioning bionic impeller of the present invention includes a hub and a plurality of blades. The plurality of blades are arranged at intervals around the hub in the circumferential direction, and the blades include a sheet body and at least one columnar protrusion. The columnar protrusion is arranged on the inner side wall of the concave part, and the columnar protrusion extends in a direction parallel to the center axis of the hub. When in use, along the circumferential direction of the hub, the blades rotate from the outer side wall toward the inner side wall, so the columnar protrusion is facing the windward side, so that the columnar protrusion can guide the airflow when the blades rotate, thereby reducing the generation and development of turbulent vortices. In summary, the automotive air-conditioning bionic impeller of the present invention can be improved based on existing products at a low cost, and significantly suppress and reduce turbulent vortices, significantly reduce the aerodynamic noise in the volute tongue area of ​​the fan, and significantly improve the NVH performance of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1This is a schematic structural diagram of a bionic impeller for an automobile air conditioner according to an embodiment of the present invention;

[0025] Figure 2 A partial enlarged view of a bionic impeller for an automobile air conditioner according to an embodiment of the present invention;

[0026] Figure 3 This is a partially enlarged view of the automotive air-conditioning bionic impeller from another perspective of an embodiment of the present invention.

[0027] Icons: 11-hub; 12-blades; 13-connecting ring; 100-body; 110-inner wall; 120-outer wall; 130-radial outer wall; 140-radial inner wall; 200-columnar protrusion. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Please refer to Figure 1 This embodiment provides a bionic impeller for an automobile air conditioner, comprising:

[0035] Wheel hub 11;

[0036] and a plurality of blades 12 arranged circumferentially and spaced apart around the hub 11;

[0037] The blade 12 includes a body 100 and at least one columnar protrusion 200;

[0038] In each blade 12, along the circumferential direction of the hub 11, the blade body 100 has an inner side wall 110 and an outer side wall 120 opposite to each other, and the inner side wall 110 protrudes toward the outer side wall 120 so that the blade body 100 is bent into an arc shape;

[0039] In each blade 12 , the columnar protrusion 200 is disposed on the inner side wall 110 of the blade body 100 , and the columnar protrusion 200 extends in a direction parallel to the central axis of the hub 11 .

[0040] The multiple blades 12 of the automotive air-conditioning bionic impeller of the present solution are arranged at intervals around the hub 11 in the circumferential direction, and the blades 12 include a sheet body 100 and at least one columnar protrusion 200. The columnar protrusion 200 is arranged on the concave inner side wall 110, and the columnar protrusion 200 extends in a direction parallel to the central axis of the hub 11. When in use, along the circumferential direction of the hub 11, the blade 12 rotates from the outer side wall 120 toward the inner side wall 110, so the columnar protrusion 200 is facing the windward side, so that the columnar protrusion 200 can guide the airflow when the blade 12 rotates, thereby reducing the generation and development of turbulent vortices. In summary, the automotive air-conditioning bionic impeller of the present solution can be improved based on the existing impeller at a low cost, and significantly suppress and reduce turbulent vortices, significantly reduce the aerodynamic noise in the volute tongue area of ​​the fan, and significantly improve the NVH performance of the whole vehicle.

[0041] Please continue reading Figure 1 , Figure 2 and Figure 3 , to understand more structural details of the automotive air-conditioning bionic impeller. Optionally, the automotive air-conditioning bionic impeller further includes a connecting ring 13, the bottoms of the plurality of blades 12 are evenly distributed on the top of the circular hub 11, and the connecting rings 13 are all connected to the tops of the blades 12, so that the blades 12 are located between the connecting ring 13 and the hub 11.

[0042] from Figure 1It can be seen that in an optional embodiment, along the central axis direction of the hub 11, the columnar protrusion 200 of each blade 12 extends from the top of the sheet body 100 to the bottom of the sheet body 100. That is, the columnar protrusion 200 is arranged along the thickness direction of the impeller, and the columnar protrusion 200 is the same length as the height of the blade 12. Such an arrangement enables the columnar protrusion 200 to provide a better effect of suppressing turbulent vortices in the entire height direction of the blade 12.

[0043] In an optional embodiment, along the circumferential direction of the hub 11, the thickness of the columnar protrusion 200 is less than or equal to the thickness along the sheet 100. In this way, the columnar protrusion 200 can suppress turbulent vortices and improve wind noise, and can also avoid the influence of the columnar protrusion 200 on the operation of the impeller.

[0044] Further, in an optional embodiment, the surface of the cylindrical protrusion 200 facing away from the inner wall 110 is arc-shaped along the circumferential direction of the hub 11. The arc-shaped surface enables the fluid to flow smoothly between the cylindrical protrusion 200 and the surface of the blade 12, which can suppress turbulent vortices and avoid interference with the surface of the blade 12.

[0045] In an optional embodiment, the cylindrical protrusion 200 is semi-cylindrical. It should be noted that the semi-cylindrical shape here is only an example. In other embodiments, the cylindrical protrusion 200 can be a cylinder with an outer wall of a major arc or a minor arc, or other shapes, which are not specifically limited here, as long as the cylindrical protrusion 200 can achieve the effect of suppressing turbulent vortices.

[0046] from Figure 2 and Figure 3 It can also be seen that in an optional embodiment, in each blade 12, when the blade 12 includes a plurality of columnar protrusions 200, the plurality of columnar protrusions 200 are arranged on the sheet body 100 along the radial direction of the hub 11. In this way, it is possible to avoid interference of adjacent columnar protrusions 200 in the same blade 12 with the fluid on the surface of the blade 12, and further enhance the effect of the columnar protrusions 200 in suppressing turbulent vortices.

[0047] In an optional embodiment, in each blade 12, a plurality of columnar protrusions 200 are evenly distributed on the blade body 100 along the radial direction of the hub 11. The even distribution can ensure that there is sufficient gap between adjacent columnar protrusions 200 to ensure the columnar protrusions 200 have the effect of suppressing turbulent vortices.

[0048] In an optional embodiment, in each blade 12, along the radial direction of the hub 11, the columnar protrusion 200 maintains a distance from the radial outer wall 130 and the radial inner wall 140 of the blade body 100. This arrangement ensures that the columnar protrusion 200 does not interfere with the flow of the fluid at the periphery of the blade 12, but is concentrated in the middle of the inner wall 110 of the blade 12, thereby efficiently suppressing the turbulent vortex and reducing the aerodynamic noise when the impeller rotates.

[0049] In an optional embodiment, the number of columnar protrusions 200 on the blade 12 is 1-3. In this embodiment, two columnar protrusions 200 are provided on each blade 12. It should be noted that the number, specific position and size of the columnar protrusions 200 on the blade 12 should be selected according to the actual flow field of the specific model.

[0050] In a second aspect, the present invention provides a centrifugal fan, comprising the automotive air-conditioning bionic impeller of any one of the aforementioned embodiments.

[0051] In summary, the embodiments of the present invention provide a bionic impeller and centrifugal fan for an automobile air conditioner, which have at least the following advantages:

[0052] The blade 12 of the automotive air-conditioning bionic impeller of the present solution includes a sheet body 100 and at least one columnar protrusion 200. The columnar protrusion 200 is arranged on the concave inner side wall 110, and the columnar protrusion 200 extends in a direction parallel to the central axis of the hub 11. When in use, along the circumferential direction of the hub 11, the blade 12 rotates from the outer side wall 120 toward the inner side wall 110, so the columnar protrusion 200 is facing the windward side, so that the columnar protrusion 200 can guide the airflow when the blade 12 rotates, thereby reducing the generation and development of turbulent vortices. In summary, the automotive air-conditioning bionic impeller of the present solution can be improved at a low cost based on existing products, and significantly suppress and reduce turbulent vortices, significantly reduce the aerodynamic noise in the volute tongue area of ​​the fan, and significantly improve the NVH performance of the whole vehicle.

[0053] The above are only specific embodiments 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 shall be subject to the protection scope of the claims.

Claims

1. A bionic impeller for automobile air conditioning, characterized in that: include: Wheel hub (11); and a plurality of blades (12) arranged circumferentially and spaced apart around the hub (11); The blade (12) comprises a blade body (100) and at least one columnar protrusion (200); In each of the blades (12), along the circumferential direction of the hub (11), the blade body (100) has an inner side wall (110) and an outer side wall (120) opposite to each other, and the inner side wall (110) protrudes toward the outer side wall (120) so that the blade body (100) is bent into an arc shape; In each of the blades (12), the columnar protrusion (200) is arranged on the inner side wall (110) of the blade body (100), and the columnar protrusion (200) extends in a direction parallel to the central axis of the hub (11).

2. The automotive air-conditioning bionic impeller according to claim 1, characterized in that: Along the central axis direction of the hub (11), the columnar protrusion (200) of each blade (12) extends from the top of the sheet body (100) to the bottom of the sheet body (100).

3. The automotive air-conditioning bionic impeller according to claim 1, characterized in that: Along the circumferential direction of the hub (11), the thickness of the columnar protrusion (200) is less than or equal to the thickness along the sheet body (100).

4. The automotive air-conditioning bionic impeller according to claim 1, characterized in that: Along the circumferential direction of the hub (11), the surface of the columnar protrusion (200) facing away from the inner side wall (110) is arc-shaped.

5. The automotive air-conditioning bionic impeller according to claim 4, characterized in that: The columnar protrusion (200) is semi-cylindrical.

6. The automotive air-conditioning bionic impeller according to claim 1, characterized in that: In each of the blades (12), when the blade (12) includes a plurality of the columnar protrusions (200), the plurality of the columnar protrusions (200) are arranged on the sheet body (100) along the radial direction of the hub (11).

7. The automotive air-conditioning bionic impeller according to claim 6, characterized in that: In each of the blades (12), a plurality of columnar protrusions (200) are evenly distributed on the blade body (100) along the radial direction of the hub (11).

8. The automotive air-conditioning bionic impeller according to claim 6, characterized in that: The number of the columnar protrusions (200) of the blade (12) is 1-3.

9. The automotive air-conditioning bionic impeller according to claim 1, characterized in that: In each of the blades (12), along the radial direction of the hub (11), the columnar protrusion (200) maintains a spacing from the radial outer wall (130) and the radial inner wall (140) of the blade body (100).

10. A centrifugal fan, characterized in that: The centrifugal fan comprises the automotive air-conditioning bionic impeller according to any one of claims 1-9.

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