Bionic impeller and centrifugal fan of automobile air conditioner

Abstract

The utility model 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 utility model relates to the technical field of automobile air conditioners, in particular to a bionic impeller and a centrifugal fan for an automobile air conditioner. Background Art

[0002] While meeting airflow requirements and generating pressure, the blower in an automotive air conditioning system also produces significant turbulent vortices near the tongue. As vehicle airflow requirements for air conditioning continue to increase, the noise problem of air conditioning blowers is becoming increasingly apparent, and the noise problem becomes more severe as the impeller speed increases.

[0003] Especially in the current era of rapid development of new energy vehicles, they place even stricter requirements on vehicle NVH performance. Air conditioning noise is the primary noise source in new energy vehicles under various operating conditions. Blower noise directly impacts passenger comfort, necessitating an urgent solution. Utility Model Content

[0004] The objectives of the present utility model 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 embodiment of the present utility model can be implemented as follows:

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

[0007] wheel hub;

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

[0009] The blade includes 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 sidewall and an outer sidewall opposite to each other, and the inner sidewall protrudes toward the outer sidewall so that the blade body is bent into an arc shape;

[0011] In each of the blades, the columnar protrusions are arranged on the inner side wall of the blade body, and the columnar protrusions extend 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 to the bottom of the sheet.

[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, the 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 utility model provides a centrifugal fan, which includes the automotive air-conditioning bionic impeller according to 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 this solution 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 provided on the concave inner side wall, 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 this solution can be improved at low cost based on existing products, and significantly suppress and reduce turbulent vortices, significantly reduce the aerodynamic noise in the fan volute tongue area, and significantly improve the NVH performance of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

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

[0025] Figure 2 This is a partial enlarged view of the automotive air-conditioning bionic impeller according to an embodiment of the utility model;

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

[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] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein 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 claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also 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, it does not need to be further defined or explained 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, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it 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 and describe, 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 can 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 circumferentially spaced apart and arranged around the hub 11;

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

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

[0039] In each blade 12 , the cylindrical protrusion 200 is disposed on the inner sidewall 110 of the blade body 100 , and the cylindrical 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 this solution are arranged at intervals in the circumferential direction around the hub 11, 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 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 blades 12 rotate from the outer wall 120 toward the inner wall 110, so the columnar protrusion 200 is facing the windward side, so that the columnar protrusion 200 can guide the airflow when the blades 12 rotate, thereby reducing the generation and development of turbulent vortices. In summary, the automotive air-conditioning bionic impeller of this solution can be improved at a low cost based on the existing impeller, and significantly suppress and reduce turbulent vortices, significantly reduce the aerodynamic noise in the fan volute tongue area, and significantly improve the NVH performance of the entire vehicle.

[0041] Please continue reading Figure 1 、 Figure 2 and Figure 3 , for more structural details of the automotive air conditioner bionic impeller. Optionally, the automotive air conditioner bionic impeller further includes a connecting ring 13. The bottoms of the plurality of blades 12 are uniformly distributed on the top of the circular hub 11. The connecting ring 13 is connected to the top of each blade 12, so that the blades 12 are located between the connecting ring 13 and the hub 11.

[0042] from Figure 1As can be seen in the figure, in an optional embodiment, along the central axis of the hub 11, the cylindrical protrusion 200 of each blade 12 extends from the top of the blade 100 to the bottom of the blade 100. That is, the cylindrical protrusion 200 is arranged along the thickness direction of the impeller, and the cylindrical protrusion 200 is the same length as the height of the blade 12. This arrangement enables the cylindrical protrusion 200 to provide a better turbulent vortex suppression effect throughout the entire height direction of the blade 12.

[0043] In an optional embodiment, the thickness of the cylindrical protrusion 200 along the circumferential direction of the hub 11 is less than or equal to the thickness along the sheet 100. This can take into account the effect of the cylindrical protrusion 200 in suppressing turbulent vortices and improving wind noise, and can also avoid the influence of the cylindrical protrusion 200 on the operation of the impeller.

[0044] Furthermore, in an optional embodiment, the surface of the cylindrical protrusion 200 facing away from the inner sidewall 110 is arc-shaped along the circumferential direction of the hub 11. The arc-shaped surface allows the fluid to flow smoothly between the cylindrical protrusion 200 and the surface of the blade 12, thereby suppressing turbulent vortices and avoiding 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 is merely an example. In other embodiments, the cylindrical protrusion 200 may be a cylinder with an outer wall having a major or minor arc, or other shapes, without specific limitation, 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 multiple cylindrical protrusions 200, the multiple cylindrical protrusions 200 are arranged on the blade body 100 along the radial direction of the hub 11. This can prevent adjacent cylindrical protrusions 200 in the same blade 12 from interfering with the fluid on the surface of the blade 12, and can further enhance the effectiveness of the cylindrical protrusions 200 in suppressing turbulent vortices.

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

[0048] In an optional embodiment, in each blade 12, the cylindrical protrusion 200 maintains a distance from both the radial outer wall 130 and the radial inner wall 140 of the blade body 100 along the radial direction of the hub 11. This arrangement prevents the cylindrical protrusion 200 from interfering with the flow of fluid around the periphery of the blade 12, but instead concentrates the protrusion 200 in the middle of the inner sidewall 110 of the blade 12, thereby effectively suppressing turbulent vortices and reducing aerodynamic noise during impeller rotation.

[0049] In an optional embodiment, the number of columnar protrusions 200 on the blade 12 is 1-3. In this embodiment, each blade 12 is provided with two columnar protrusions 200. It should be noted that the number, specific location 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, which includes 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 invention 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 invention can be improved at low cost based on existing products, and significantly suppress and reduce turbulent vortices, significantly reduce the aerodynamic noise in the fan volute tongue area, and significantly improve the NVH performance of the entire vehicle.

[0053] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection 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) includes 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 sidewall (110) and an outer sidewall (120) opposite to each other, and the inner sidewall (110) protrudes toward the outer sidewall (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 (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 distance 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 to 9.

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