Axial flow wind wheel and fan equipment with same

Abstract

The utility model discloses an axial flow wind wheel and fan equipment with the axial flow wind wheel. The axial flow wind wheel comprises a hub and a plurality of fan blades, and the fan blades are arranged on the peripheral side of the hub and arranged at intervals in the circumferential direction of the hub; each fan blade is provided with a front edge, a rear edge, an inner edge and an outer edge, the front edges and the rear edges are oppositely arranged in the circumferential direction of the hub, the inner edges and the outer edges are oppositely arranged in the radial direction of the hub, and the inner edges are connected with the hub; the suction surface of the fan blade is provided with a concave part, and at least part of the peripheral contour of the concave part is formed by inward offset of the front edge, the rear edge, the inner edge and the outer edge. The axial flow wind wheel is light in weight and low in noise during operation, the design of light weight and low noise is achieved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an axial flow fan wheel and a fan device. Background Art

[0002] In the prior art, the fan of the air conditioner outdoor unit is mostly an axial flow fan wheel. The cost of the axial flow fan wheel is closely related to its weight, that is, the lighter the weight of the axial flow fan wheel, the lower its cost. However, the axial flow fan wheel cannot be designed to be too light based on cost considerations, because too light a weight will cause structural and noise problems when the axial flow fan wheel is running. Therefore, how to achieve both lightness and low noise has become a design difficulty of the axial flow fan wheel. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes an axial flow fan wheel, which is light in weight and makes little noise during operation, and has a design that combines lightness and low noise, thereby improving the user experience.

[0005] The embodiment of the present invention further provides a wind turbine device including the above-mentioned axial flow wind wheel.

[0006] The axial flow wind wheel of the embodiment of the present invention comprises a hub and a plurality of wind blades, wherein the plurality of wind blades are provided on the outer peripheral side of the hub and are spaced apart along the circumference of the hub;

[0007] The fan blade has a leading edge, a trailing edge, an inner edge and an outer edge, the leading edge and the trailing edge are arranged opposite to each other in the circumferential direction of the hub, the inner edge and the outer edge are arranged opposite to each other in the radial direction of the hub, and the inner edge is connected to the hub;

[0008] A concave portion is provided on the suction surface of the fan blade, and at least a portion of an outer peripheral contour of the concave portion is formed by inward deviation of the leading edge, the trailing edge, the inner edge, and the outer edge.

[0009] In some embodiments, the trailing edge is provided with a groove, and the groove is arranged adjacent to the outer edge in the radial direction of the hub.

[0010] In some embodiments, the recess has a front contour line, a rear contour line, an inner contour line and an outer contour line, wherein the front contour line is formed by the front edge offset, the rear contour line is formed by the front edge offset, the inner contour line is formed by the inner edge offset, and the outer contour line is formed by the outer edge offset.

[0011] In some embodiments, the front contour line and the front edge have the same curvature, the rear contour line and the rear edge have the same curvature, the inner contour line and the inner edge have the same curvature, and the outer contour line and the outer edge have the same curvature.

[0012] In some embodiments, a line connecting the connection point of the front edge and the outer edge and the center of the hub forms a first line, a line connecting the connection point of the front contour line and the outer contour line and the center of the hub forms a second line, and the first line and the second line form an angle a1;

[0013] A line connecting the connection point of the rear edge and the outer edge and the center of the hub forms a third line, a line connecting the connection point of the rear contour line and the outer contour line and the center of the hub forms a fourth line, and the third line and the fourth line form an angle a2;

[0014] The angle a1 is greater than the angle a2.

[0015] In some embodiments, the angle a1 is 8° to 12°;

[0016] And / or, the angle a2 is 2° to 4°.

[0017] In some embodiments, the first connecting line is a tangent line at the connection between the leading edge and the outer edge;

[0018] The second connecting line is a tangent line between the front contour line and the outer contour line;

[0019] The third connecting line is a tangent line at the connection between the trailing edge and the outer edge;

[0020] The fourth connecting line is a tangent line between the rear contour line and the outer contour line.

[0021] In some embodiments, the distance between the inner edge and the outer edge is d, the distance between the outer contour line and the outer edge is d1, and 0.08≤d1 / d≤0.1;

[0022] And / or, the distance between the inner contour line and the inner edge is d2, 0.15≤d2 / d≤0.18.

[0023] In some embodiments, the depth dimension M of the recess is 1 mm to 4 mm.

[0024] The wind turbine device of the embodiment of the present invention includes the axial flow wind wheel as described in any of the above embodiments.

[0025] Beneficial effects: The axial flow wind wheel and the fan equipment of the embodiment of the utility model are light in weight and make little noise during operation, and have both lightweight and low-noise designs, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the air inlet side of the axial flow wind wheel according to an embodiment of the present invention.

[0027] Figure 2 It is a side perspective schematic diagram of the axial flow wind wheel according to an embodiment of the present utility model.

[0028] Figure 3 yes Figure 2 An enlarged schematic diagram of a single fan blade.

[0029] Reference numerals:

[0030] 1-wheel hub;

[0031] 2-blade; 20-suction surface; 21-leading edge; 22-trailing edge; 221-groove; 23-inner edge; 24-outer edge; 25-recess; 251-front contour line; 252-rear contour line; 253-inner contour line; 254-outer contour line;

[0032] 3- First connection;

[0033] 4- Second connection;

[0034] 5-the third connection;

[0035] 6-The fourth connection. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] like Figure 1 As shown, the axial flow wind wheel of the embodiment of the present invention comprises a hub 1 and a plurality of blades 2, wherein the plurality of blades 2 are provided on the outer peripheral side of the hub 1 and are spaced apart along the circumference of the hub 1. For example, the hub 1 can be generally a cap-shaped structure, and an open inner cavity is provided in the hub 1, such as Figure 2 As shown, the sealing end of the hub 1 can face the air inlet side during use, and the opening of the inner cavity of the hub 1 can face the air outlet side during use.

[0038] The fan blades 2 can be integrally molded on the outer peripheral side of the hub 1 . Three fan blades 2 can be provided, and the three fan blades 2 can be arranged at equal intervals along the circumference of the hub 1 .

[0039] For example, Figure 1 As shown, the structure of the three above-mentioned fan blades 2 can be the same, and the outer peripheral contour of each fan blade 2 can have four edges, which are the above-mentioned front edge 21, rear edge 22, inner edge 23 and outer edge 24. Among them, the front edge 21 and the rear edge 22 are oppositely arranged in the circumferential direction of the hub 1, and the inner edge 23 and the outer edge 24 are oppositely arranged in the radial direction of the hub 1, and the inner edge 23 is connected with the hub 1, for example, the inner edge 23 is integrally injection molded with the hub 1.

[0040] The suction surface 20 of the fan blade 2 is provided with a recess 25, and at least part of the outer peripheral contour of the recess 25 is formed by inwardly offsetting the front edge 21, rear edge 22, inner edge 23 and outer edge 24. For example, as shown in Figure 1 As shown, the suction surface 20 of the fan blade 2 can be the surface of the fan blade 2 facing the air inlet side in use, the recess 25 can be a groove structure provided on the suction surface 20, and the overall shape of the outer peripheral contour of the recess 25 can be similar to the shape of the fan blade 2, that is, the outer peripheral contour of the recess 25 can be considered as being formed by offsetting the above-mentioned front edge 21, rear edge 22, inner edge 23 and outer edge 24 of the fan blade 2 inwardly.

[0041] The axial flow fan of the embodiment of the utility model, the recess 25 is arranged on each fan blade 2, and the recess 25 is arranged in one aspect to reduce the material and consumables of the fan blade 2, so that the overall cost can be reduced and the lightweight design of the axial flow fan can be realized.

[0042] Secondly, when the axial flow fan rotates, the added recess 25 can perform lag processing on the separation of the suction surface 20, so that the vortex of the suction surface 20 can form two-stage separation in advance, that is, part of the flow will flow along the recess 25, and the two-stage separation will make the original separation point lag, so that the pressure intensity at the blade tip position can be reduced, and the effect of reducing the noise of the impeller rotation is achieved.

[0043] In some embodiments, the rear edge 22 is provided with a groove 221, and the groove 221 is arranged adjacent to the outer edge 24 in the radial direction of the hub 1. For example, as shown in Figure 2 As shown, the groove 221 can be a circular arc groove, and each rear edge 22 can be provided with one groove 221, and each groove 221 is arranged more adjacent to the outer edge 24 than the inner edge 23 in the radial direction of the hub 1.

[0044] The arranged groove 221 can effectively reduce the vortex shedding of the tail of the fan blade 2, and can further reduce the noise generated by the tail edge vortex. Secondly, the arrangement of the groove 221 can further reduce the consumables and materials, and the lightweight design of the axial flow fan can be further realized.

[0045] In some embodiments, as shown in Figure 1As shown, the outer contour of the recess 25 can be trapezoidal in shape as a whole, with the recess 25 having a front contour line 251, a rear contour line 252, an inner contour line 253, and an outer contour line 254. The front contour line 251 is formed by offsetting the leading edge 21, the rear contour line 252 is formed by offsetting the leading edge 21, the inner contour line 253 is formed by offsetting the inner edge 23, and the outer contour line 254 is formed by offsetting the outer edge 24. This design, in which the outer contour of the recess 25 is similar to the shape of the fan blade 2, allows the recess 25 to substantially cover the entire fan blade 2, further reducing its usage and achieving lightweighting.

[0046] In some embodiments, the leading edge 21, trailing edge 22, inner edge 23, outer edge 24, front contour line 251, rear contour line 252, inner contour line 253, and outer contour line 254 may all be curved, wherein the front contour line 251 has the same curvature as the leading edge 21, the rear contour line 252 has the same curvature as the trailing edge 22, the inner contour line 253 has the same curvature as the inner edge 23, and the outer contour line 254 has the same curvature as the outer edge 24. This further ensures that the outer contour of the recess 25 is similar to the shape of the blade 2, which is also conducive to further enhancing the two-stage separation effect and reducing noise.

[0047] In some embodiments, as Figure 1 As shown, the line connecting the connection between the leading edge 21 and the outer edge 24 and the center of the hub 1 forms a first line 3, and the line connecting the connection between the front contour line 251 and the outer contour line 254 and the center of the hub 1 forms a second line 4. The first line 3 and the second line 4 form an angle a1.

[0048] The line connecting the connection between the rear edge 22 and the outer edge 24 and the center of the hub 1 forms a third line 5, and the line connecting the connection between the rear contour line 252 and the outer contour line 254 and the center of the hub 1 forms a fourth line 6. The third line 5 and the fourth line 6 form an angle a2.

[0049] The angle a1 is greater than the angle a2, so that the distance between the first connecting line 3 and the second connecting line 4 at the blade tip is larger, which fully ensures the structural strength of the blade tip, avoids the blade tip from vibrating and deforming under high wind pressure, and improves the stability of use.

[0050] In some embodiments, the angle a1 is between 8° and 12°. For example, the angle a1 can be 8°, 9°, 10°, 11°, 12°, etc. When the angle a1 is within this range, the leading edge 21 can have a good weight reduction effect while maintaining the structural strength.

[0051] In some embodiments, the angle a2 is between 2° and 4°. For example, the angle a2 can be 2°, 3°, 4°, etc. Within this range, the angle a2 can ensure the structural strength of the trailing edge 22 while achieving a good weight reduction effect.

[0052] In some embodiments, the first connecting line 3, the second connecting line 4, the third connecting line 5, and the fourth connecting line 6 may all be tangent lines, wherein the first connecting line 3 is a tangent line at the connection between the leading edge 21 and the outer edge 24, the second connecting line 4 is a tangent line between the front contour line 251 and the outer contour line 254, the third connecting line 5 is a tangent line at the connection between the trailing edge 22 and the outer edge 24, and the fourth connecting line 6 is a tangent line between the trailing contour line 252 and the outer contour line 254. This makes each connecting line unique, facilitating the determination and positioning of each connecting line.

[0053] In some embodiments, as Figure 3 As shown, the distance between the inner edge 23 and the outer edge 24 is d, which can be the distance between the inner edge 23 and the outer edge 24 in the radial direction of the hub 1. The distance between the outer contour line 254 and the outer edge 24 is d1, which can be the distance between the outer contour line 254 and the outer edge 24 in the radial direction of the hub 1. 0.08≤d1 / d≤0.1. For example, the ratio of distance d1 to distance d can be 0.08, 0.09, 0.1, etc.

[0054] Since the airflow velocity at the blade tip is very high during rotation, limiting the ratio of the distance d1 to the distance d within the above range avoids the blade tip being thinner due to the setting of the recess 25, thereby fully ensuring the structural strength of the blade tip.

[0055] In some embodiments, the distance between the inner contour line 253 and the inner edge 23 is d2, which can be the radial spacing between the inner contour line 253 and the inner edge 23 in the hub 1, and 0.15≤d2 / d≤0.18. For example, the ratio of the distance d2 to the distance d can be 0.15, 0.16, 0.17, 0.18, etc.

[0056] Since stress concentration occurs at the blade root during rotation, limiting the ratio of the distance d2 to the distance d within the above range avoids the blade root from being thinner due to the provision of the recess 25, thereby fully ensuring the structural strength of the blade root.

[0057] In some embodiments, the depth dimension M of the recess 25 is 1 mm to 4 mm. Figure 3As shown, the depth dimension M of the recess 25 can be a dimension along the axial direction, and the depth dimension M can be 1 mm, 2 mm, 3 mm, 4 mm, etc., thereby constraining the groove depth of the recess 25. While achieving lightweight, it also avoids the situation where the groove depth is too deep and the structure is significantly weakened. Secondly, it is also beneficial to enhance the two-stage separation effect of the incoming flow.

[0058] The following describes the fan equipment according to the embodiment of the present invention.

[0059] The fan device of the present invention includes an axial flow fan wheel, which can be any of the axial flow fan wheels described in any of the above embodiments. The fan device can specifically be an air conditioner outdoor unit. In other embodiments, the fan device can also be a fan, an industrial fan, a vehicle fan, or other fan devices.

[0060] The fan blades of the fan device in the embodiment of the utility model are provided with recesses, which can effectively reduce the weight of the wind wheel, reduce the amount of consumables, and reduce costs. At the same time, it can also effectively reduce the noise of the wind wheel, ensure the sound quality when the wind wheel is running, and improve the user experience.

[0061] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. An axial flow wind wheel, characterized in that: It comprises a hub (1) and a plurality of blades (2), wherein the plurality of blades (2) are provided on the outer peripheral side of the hub (1) and are spaced apart along the circumference of the hub (1); The fan blade (2) has a leading edge (21), a trailing edge (22), an inner edge (23) and an outer edge (24); the leading edge (21) and the trailing edge (22) are arranged relative to each other in the circumferential direction of the hub (1); the inner edge (23) and the outer edge (24) are arranged relative to each other in the radial direction of the hub (1); and the inner edge (23) is connected to the hub (1); The suction surface (20) of the fan blade (2) is provided with a recess (25), and at least a portion of the outer peripheral contour of the recess (25) is formed by the inward deviation of the leading edge (21), the trailing edge (22), the inner edge (23), and the outer edge (24).

2. The axial flow wind wheel according to claim 1, characterized in that: The trailing edge (22) is provided with a groove (221), and the groove (221) is arranged adjacent to the outer edge (24) in the radial direction of the hub (1).

3. The axial flow wind wheel according to claim 1, characterized in that: The recess (25) has a front contour line (251), a rear contour line (252), an inner contour line (253) and an outer contour line (254), wherein the front contour line (251) is formed by offsetting the front edge (21), the rear contour line (252) is formed by offsetting the front edge (21), the inner contour line (253) is formed by offsetting the inner edge (23), and the outer contour line (254) is formed by offsetting the outer edge (24).

4. The axial flow wind wheel according to claim 3, characterized in that: The front contour line (251) has the same curvature as the front edge (21), the rear contour line (252) has the same curvature as the rear edge (22), the inner contour line (253) has the same curvature as the inner edge (23), and the outer contour line (254) has the same curvature as the outer edge (24).

5. The axial flow wind wheel according to claim 3, characterized in that: A line connecting the connection point of the front edge (21) and the outer edge (24) and the center of the wheel hub (1) forms a first line (3); a line connecting the connection point of the front contour line (251) and the outer contour line (254) and the center of the wheel hub (1) forms a second line (4); the first line (3) and the second line (4) form an angle a1; A line connecting the connection point of the rear edge (22) and the outer edge (24) and the center of the wheel hub (1) forms a third line (5), a line connecting the connection point of the rear contour line (252) and the outer contour line (254) and the center of the wheel hub (1) forms a fourth line (6), and the third line (5) and the fourth line (6) form an angle a2; The angle a1 is greater than the angle a2.

6. The axial flow wind wheel according to claim 5, characterized in that: The angle a1 is 8° to 12°; And / or, the angle a2 is 2° to 4°.

7. The axial flow wind wheel according to claim 5, characterized in that: The first connecting line (3) is a tangent line at the connection point between the front edge (21) and the outer edge (24); The second connecting line (4) is a tangent line between the front contour line (251) and the outer contour line (254); The third connecting line (5) is a tangent line at the connection point between the rear edge (22) and the outer edge (24); The fourth connecting line (6) is a tangent line between the rear contour line (252) and the outer contour line (254).

8. The axial flow wind wheel according to claim 3, characterized in that: The distance between the inner edge (23) and the outer edge (24) is d, the distance between the outer contour line (254) and the outer edge (24) is d1, and 0.08≤d1 / d≤0.1; And / or, the distance between the inner contour line (253) and the inner edge (23) is d2, 0.15≤d2 / d≤0.

18.

9. The axial flow wind wheel according to any one of claims 1 to 8, characterized in that: The depth dimension M of the recess (25) is 1 mm to 4 mm.

10. A fan device, characterized in that: The utility model comprises an axial flow wind wheel as claimed in any one of claims 1 to 9.

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