Shaft cover assembly, cross-flow fan blade and electrical equipment

Abstract

The utility model relates to a shaft cover assembly, a cross-flow fan blade and electrical equipment, the shaft cover assembly is used for the cross-flow fan blade, the shaft cover assembly comprises a shaft cover and a supporting shaft, the supporting shaft is arranged on the axial side of the shaft cover and connected with the shaft cover, a flow guide protrusion is arranged on the side, away from the supporting shaft, of the shaft cover, and the flow guide protrusion is connected with the supporting shaft. A flow guide face is arranged on the side, away from the supporting shaft, of the flow guide protrusion. According to the shaft cover assembly, the flow guide protrusion is arranged on the side, away from the supporting shaft, of the shaft cover, the deformation resistance and the falling resistance of the shaft cover are improved, and the stability and the reliability of the shaft cover assembly are improved. The flow guide face is arranged on the side, away from the supporting shaft, of the flow guide protrusion, and the air supply efficiency and the air outlet amount of the cross-flow fan blade are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cross-flow fans, and particularly relates to a shaft cover assembly, a cross-flow impeller, and an electrical device. Background Art

[0002] The shaft cover assembly of the cross-flow impeller is arranged at the end of the cross-flow impeller and is connected to the middle-section impeller. When the cross-flow impeller rotates, the shaft cover assembly plays a role in supporting and fixing the middle-section impeller, and at the same time also affects the air flow direction, flow resistance, flow velocity, etc., directly affecting the air supply efficiency and air volume of the cross-flow impeller. In the related art, reinforcing ribs are arranged on one side of the shaft cover assembly close to the middle-section impeller to improve the structural strength of the shaft cover assembly. When the cross-flow impeller rotates, the air flow inside the cross-flow impeller will collide with the reinforcing ribs on the shaft cover assembly, not only causing friction between the air flow and the reinforcing ribs, increasing the working noise of the cross-flow impeller; but also easily forming air flow disorder and vortex phenomena, reducing the air supply efficiency and air volume of the cross-flow impeller. Summary of the Utility Model

[0003] The present disclosure provides a shaft cover assembly to improve the structural strength of the shaft cover assembly, improve the air supply efficiency and air volume of the cross-flow impeller, and reduce the working noise of the cross-flow impeller.

[0004] The shaft cover assembly of the present disclosure is used for a cross-flow impeller. The shaft cover assembly includes a shaft cover and a support shaft. The support shaft is arranged on one axial side of the shaft cover and is connected to the shaft cover. A guide protrusion is arranged on one side of the shaft cover away from the support shaft, and a guide surface is arranged on one side of the guide protrusion away from the support shaft.

[0005] Optionally, the guide surface is a conical surface.

[0006] Optionally, the cone angle of the conical surface is 75° to 157.2°.

[0007] Optionally, the outer peripheral contour of the guide protrusion is frustum-shaped, and the center line of the guide protrusion coincides with the axis of the shaft cover.

[0008] Optionally, the ratio of the diameter of the guide protrusion to the diameter of the shaft cover is 0.13 to 0.78.

[0009] Optionally, the shaft cover includes a shaft cover body, the support shaft is connected to the shaft cover body, and the guide protrusion is formed by a convex bump protruding in a direction away from the support shaft.

[0010] Optionally, the dimension of the shaft cover body in the axial direction of the shaft cover is 1 mm to 3 mm, and the dimension of the guide protrusion in the axial direction of the shaft cover is 2 mm to 15 mm.

[0011] Optionally, the shaft cover assembly further includes a reinforcing rib, which is disposed on a side of the shaft cover close to the support shaft and connected to the shaft cover.

[0012] Optionally, the shaft cover includes a shaft cover body, the support shaft is connected to the shaft cover body, and the guiding protrusion is formed by a convex hull protruding in a direction away from the support shaft; a through hole is provided in the shaft cover body, the through hole corresponds to the guiding protrusion, and a cavity is formed between a side of the guiding protrusion close to the support shaft and the shaft cover, and the reinforcing rib is disposed in the cavity.

[0013] Optionally, a side of the reinforcing rib close to the guiding protrusion is connected to the guiding protrusion; and / or, the through hole is annular, an inner end of the reinforcing rib is connected to an inner wall surface of the through hole, and an outer end of the reinforcing rib is connected to an outer wall surface of the through hole.

[0014] The present disclosure also provides a cross-flow impeller.

[0015] The cross-flow impeller of the present disclosure includes a shaft cover assembly, an end cover assembly, and a middle-section impeller. The shaft cover assembly is the shaft cover assembly described in any one of the above, and the shaft cover assembly and the end cover assembly are arranged at intervals along the axial direction of the shaft cover; the middle-section impeller is disposed between the shaft cover assembly and the end cover assembly, and two ends of the middle-section impeller are respectively connected to the shaft cover assembly and the end cover assembly.

[0016] The present disclosure also provides an electrical appliance.

[0017] The electrical appliance of the present disclosure includes the cross-flow impeller described in any one of the above.

[0018] For the shaft cover assembly of the present disclosure, by providing a guiding protrusion on a side of the shaft cover away from the support shaft, the guiding protrusion can be used to increase the structural strength of the shaft cover assembly, improve the anti-deformation ability and anti-drop performance of the shaft cover, and improve the stability and reliability of the shaft cover assembly. By providing a guiding surface on a side of the guiding protrusion away from the support shaft, the guiding surface is used to guide the flow of the air flow passing through the guiding protrusion, so that the air flow passing through the guiding protrusion flows smoothly, avoiding the formation of air flow disorder and vortex phenomenon, and improving the air supply efficiency and air volume of the cross-flow impeller. In addition, the setting of the guiding surface can also reduce the flow resistance of the air flow passing through the guiding protrusion and reduce the working noise of the cross-flow impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view of the shaft cover assembly of an embodiment of the present disclosure.

[0020] Figure 2 is the rear view of the shaft cover assembly of an embodiment of the present disclosure.

[0021] Figure 3It is a cross-sectional view of the shaft cover assembly of the embodiments of the present disclosure.

[0022] Reference numerals:

[0023] 100, shaft cover assembly;

[0024] 1, shaft cover; 11, guiding protrusion; 111, guiding surface; 12, shaft cover body; 13, cavity; 14, through hole; 141, inner wall surface; 142, outer wall surface;

[0025] 2, support shaft;

[0026] 3, reinforcing rib. Detailed implementation manners

[0027] The embodiments of the present disclosure will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present disclosure and should not be construed as a limitation to the present disclosure.

[0028] As Figures 1 to 3 shown, the shaft cover assembly 100 of the embodiments of the present disclosure is used for a cross-flow fan blade. The shaft cover assembly 100 includes a shaft cover 1 and a support shaft 2. The support shaft 2 is arranged on one axial side of the shaft cover 1 and is connected to the shaft cover 1. A guiding protrusion 11 is provided on the side of the shaft cover 1 away from the support shaft 2, and a guiding surface 111 is provided on the side of the guiding protrusion 11 away from the support shaft 2.

[0029] For the shaft cover assembly 100 of the embodiments of the present disclosure, by providing the guiding protrusion 11 on the side of the shaft cover 1 away from the support shaft 2, the guiding protrusion 11 can be used to increase the structural strength of the shaft cover assembly 100, improve the anti-deformation ability and anti-drop performance of the shaft cover 1, and improve the stability and reliability of the shaft cover assembly 100. By providing the guiding surface 111 on the side of the guiding protrusion 11 away from the support shaft 2, the guiding surface 111 is used to guide the flow of the air flow passing through the guiding protrusion 11, so that the air flow passing through the guiding protrusion 11 flows smoothly, avoiding the formation of air flow disorder and vortex phenomenon, and improving the air supply efficiency and air volume of the cross-flow fan blade. In addition, the setting of the guiding surface 111 can also reduce the flow resistance of the air flow passing through the guiding protrusion 11 and reduce the working noise of the cross-flow fan blade.

[0030] Optionally, the support shaft 2 is a metal shaft, and a part of the support shaft 2 is embedded inside the shaft cover 1.

[0031] For example, the support shaft 2 is a stainless steel shaft, and the shaft cover 1 is integrally injection molded. When the shaft cover 1 is injection molded, a part of the support shaft 2 is used as an insert and is injection molded inside the shaft cover 1.

[0032] In some embodiments, the outer contour of the guiding protrusion 11 is frustum-shaped, and the center line of the guiding protrusion 11 coincides with the axis of the shaft cover 1.

[0033] By setting the outer peripheral contour of the flow guiding protrusion 11 as a frustum of a cone and making the center line of the flow guiding protrusion 11 coincide with the axis of the shaft cover 1, it is beneficial to make the center of the shaft cover assembly 100 coincide with the rotation center, thereby improving the stability of the shaft cover assembly 100 during operation.

[0034] Optionally, the ratio of the diameter of the flow guiding protrusion 11 to the diameter of the shaft cover 1 is 0.13 - 0.78.

[0035] For example, as Figure 1 shown, the diameter of the flow guiding protrusion 11 is R1, the diameter of the shaft cover 1 is R2, and the ratio of R1 to R2 is 0.13 - 0.78.

[0036] It can be understood that when the diameter of the shaft cover 1 is fixed, the larger the diameter of the flow guiding protrusion 11, the higher the structural strength of the shaft cover 1, and the better the guiding effect of the flow guiding protrusion 11 on the air flow. However, the cost of the shaft cover 1 is also higher; the smaller the diameter of the flow guiding protrusion 11, the lower the cost of the shaft cover 1, but the structural strength of the shaft cover 1 is lower, and the guiding effect of the flow guiding protrusion 11 on the air flow is poorer.

[0037] By setting the ratio of the diameter of the flow guiding protrusion 11 to the diameter of the shaft cover 1 as 0.13 - 0.78, while ensuring that the shaft cover 1 has a relatively high structural strength, the cost of the shaft cover 1 can be relatively low, and the flow guiding protrusion 11 can have a good guiding effect on the air flow.

[0038] Optionally, as Figure 3 shown, the flow guiding surface 111 is a conical surface.

[0039] By setting the flow guiding surface 111 as a conical surface, it is not only convenient for the processing and manufacturing of the flow guiding surface 111, but also enables the flow guiding surface 111 to have a good guiding effect on the air flow.

[0040] Of course, in some other embodiments, the flow guiding surface 111 can also be set as other shapes. For example, the flow guiding surface 111 can be set as a parabolic surface, a hemispherical surface, etc.

[0041] Optionally, the cone angle of the conical surface is 75° - 157.2°.

[0042] For example, as Figure 3 shown, the cone angle of the conical surface is A, and A is 75° - 157.2°.

[0043] It can be understood that when the diameter of the conical surface is fixed, the larger the cone angle of the conical surface, the smaller the axial dimension of the flow guiding protrusion 11, the lower the cost of the shaft cover 1, but the lower the structural strength of the shaft cover 1; the smaller the cone angle of the conical surface, the larger the axial dimension of the flow guiding protrusion 11, the higher the structural strength of the shaft cover 1, but the higher the cost of the shaft cover 1.

[0044] The cone angle of the conical surface is set to 75° to 157.2°, which can ensure a relatively high structural strength of the shaft cover 1 while preventing the cost of the shaft cover assembly 100 from being too high.

[0045] In some embodiments, as Figure 3 described, the shaft cover 1 includes a shaft cover body 12, and the support shaft 2 is connected to the shaft cover body 12. As Figure 3 shown, the flow guiding protrusion 11 is formed by a convex hull protruding in a direction away from the support shaft 2.

[0046] By setting the flow guiding protrusion 11 in the form of a convex hull, the flow guiding protrusion 11 has a hollow structure. This can reduce the cost and weight of the shaft cover 1, thereby reducing the cost and weight of the shaft cover assembly 100.

[0047] Optionally, the dimension of the shaft cover body 12 in the axial direction of the shaft cover 1 is 1 mm to 3 mm, and the dimension of the flow guiding protrusion 11 in the axial direction of the shaft cover 1 is 2 mm to 15 mm.

[0048] For example, as Figure 3 shown, the dimension of the shaft cover plate body 12 in the axial direction of the shaft cover 1 is D1, where D1 is 1 mm to 3 mm; the dimension of the flow guiding protrusion 11 in the axial direction of the shaft cover 1 is D2, where D2 is 2 mm to 15 mm.

[0049] By designing the dimensions of the flow guiding protrusion 11 and the shaft cover body 12 as described above, while ensuring the structural strength of the shaft cover 1, the air supply efficiency and air volume of the cross-flow fan blade can be effectively improved.

[0050] In some embodiments, the shaft cover assembly 100 further includes a reinforcing rib 3, and the reinforcing rib 3 is disposed on a side of the shaft cover 1 close to the support shaft 2 and is connected to the shaft cover 1.

[0051] By providing the reinforcing rib 3, the structural strength of the shaft cover 1 can be further improved, and the stability and reliability of the shaft cover assembly 100 can be enhanced. In addition, since the reinforcing rib 3 is disposed on a side of the shaft cover 1 close to the support shaft 2, it can prevent the reinforcing rib 3 from affecting the air flow direction, flow resistance, flow velocity, etc. inside the cross-flow fan blade, ensuring the air supply efficiency and air volume of the cross-flow fan blade.

[0052] Optionally, the reinforcing rib 3 and the shaft cover 1 are integrally injection-molded.

[0053] The integral injection molding of the reinforcing rib 3 and the shaft cover 1 facilitates the processing and manufacturing of the shaft cover assembly 100 and reduces the cost of the shaft cover assembly 100.

[0054] Optionally, the shaft cover body 12 is provided with a through hole 14, and the through hole 14 is disposed corresponding to the flow guiding protrusion 11. A cavity 13 is formed between a side of the flow guiding protrusion 11 close to the support shaft 2 and the shaft cover 1, and the reinforcing rib 3 is disposed in the cavity 13. Among them, the through hole 14 can be a demolding hole.

[0055] By arranging the reinforcing rib 3 inside the cavity 13, the layout compactness of the shaft cover assembly 100 can be improved, the weight of the shaft cover assembly 100 can be reduced, and the cost of the shaft cover assembly 100 can be lowered.

[0056] Optionally, one side of the reinforcing rib 3 close to the diversion protrusion 11 is connected to the diversion protrusion 11.

[0057] By connecting the reinforcing rib 3 to the diversion protrusion 11, the structural strength at the diversion protrusion 11 can be improved, the anti-deformation ability and anti-drop performance of the shaft cover 1 can be further enhanced, and the stability and reliability of the shaft cover assembly 100 can be improved.

[0058] Optionally, the through hole 14 is annular, the inner end of the reinforcing rib 3 is connected to the inner wall surface 141 of the through hole 14, and the outer end of the reinforcing rib 3 is connected to the outer wall surface 142 of the through hole 14.

[0059] Herein, "inward" can be understood as: on the side closer to the axis of the shaft cover 1 in a plane perpendicular to the axis of the shaft cover 1; "outward" can be understood as: on the side farther from the axis of the shaft cover 1 in a plane perpendicular to the axis of the shaft cover 1. And the inner and outer directions are as Figure 3 shown.

[0060] By connecting the inner and outer ends of the reinforcing rib 3 to the inner wall surface 141 and the outer wall surface 142 of the through hole 14 respectively, the structural strength of the shaft cover 1 can be improved, and the stability and reliability of the shaft cover assembly 100 can be enhanced.

[0061] Optionally, as Figure 2 shown, the number of the reinforcing ribs 3 is multiple, and the multiple reinforcing ribs 3 are arranged at intervals along the circumferential direction of the shaft cover 1.

[0062] For example, the number of the reinforcing ribs 3 is six, and the six reinforcing ribs 3 are evenly distributed at intervals along the circumferential direction of the shaft cover 1.

[0063] By arranging multiple reinforcing ribs 3, the structural strength of the shaft cover 1 can be further improved, and the stability and reliability of the shaft cover assembly 100 can be enhanced.

[0064] The cross-flow fan blade in the embodiment of the present disclosure includes a shaft cover assembly 100, an end cover assembly, and a middle-section fan blade. The shaft cover assembly 100 is the shaft cover assembly 100 described in any of the above embodiments. The shaft cover assembly 100 and the end cover assembly are arranged at intervals along the axial direction of the shaft cover 1. The middle-section fan blade is disposed between the shaft cover assembly 100 and the end cover assembly, and both ends of the middle-section fan blade are respectively connected to the shaft cover assembly 100 and the end cover assembly.

[0065] The cross-flow fan blade in the embodiment of the present disclosure has the advantages of good stability and reliability, high air supply efficiency and air volume, and low working noise.

[0066] The electrical equipment of the embodiments of the present disclosure includes the cross-flow impeller described in any of the above embodiments.

[0067] Among them, the electrical equipment can be household appliances, such as air conditioners, air purifiers, or fans, etc., or ventilation equipment, such as fan coil units, fresh air units, etc., or can also be an automobile, for example, the cross-flow impeller is used on an automotive air conditioner.

[0068] For the shaft cover assembly 100 of the embodiments of the present disclosure, by providing a flow guiding protrusion 11 on the side of the shaft cover 1 away from the support shaft 2, and a flow guiding surface 111 is provided on the flow guiding protrusion 11. On the one hand, the shaft cover 1 has better anti-deformation ability and anti-drop performance. In actual use, the shaft cover assembly 100 may face various complex environments and unexpected situations, and good anti-deformation and anti-drop performance can ensure the stability and reliability of the shaft cover assembly 100 in various usage scenarios. On the other hand, the flow guiding surface 111 can effectively reduce the flow resistance of the air flow. When the air flow passes through the cross-flow impeller, the flow guiding surface 111 can guide the air flow to flow more smoothly, avoiding the phenomena of air flow disorder and vortex. The smooth flow of the air flow can not only improve the air supply efficiency of the cross-flow impeller, but also significantly reduce the noise, creating a more quiet and comfortable usage environment for users. In addition, by arranging the reinforcing rib 3 on the side of the shaft cover 1 close to the support shaft 2, without affecting the structural strength of the shaft cover 1, the direct interference with the air flow can be minimized to the greatest extent.

[0069] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure.

[0070] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0071] In this disclosure, unless otherwise clearly defined or limited, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or capable of communicating with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0072] In this disclosure, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0073] In this disclosure, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this disclosure. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0074] Although the embodiments of this disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this disclosure. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of this disclosure.

Claims

1. A shaft cover assembly, characterized in that, For a cross-flow fan blade, it includes an axle cover and a support shaft. The support shaft is arranged on one axial side of the axle cover and is connected to the axle cover. On the side of the axle cover away from the support shaft, there is a flow guide protrusion, and on the side of the flow guide protrusion away from the support shaft, there is a flow guide surface.

2. The shaft cover assembly according to claim 1, wherein The flow guide surface is a conical surface.

3. The shaft cover assembly according to claim 2, wherein, The cone angle of the conical surface is 75° to 157.2°.

4. The shaft cover assembly according to claim 1, characterized in that The outer peripheral contour of the flow guide protrusion is frustum-shaped, and the center line of the flow guide protrusion coincides with the axis of the axle cover.

5. The shaft cover assembly according to claim 4, characterized in that, The ratio of the diameter of the flow guide protrusion to the diameter of the axle cover is 0.13 to 0.

78.

6. The shaft cover assembly according to claim 1, wherein, The axle cover includes an axle cover body. The support shaft is connected to the axle cover body, and the flow guide protrusion is formed by a convex hull protruding in the direction away from the support shaft.

7. The shaft cover assembly according to claim 6, characterized in that, The dimension of the axle cover body in the axial direction of the axle cover is 1 mm to 3 mm, and the dimension of the flow guide protrusion in the axial direction of the axle cover is 2 mm to 15 mm.

8. The shaft cover assembly according to claim 1, wherein, It further includes a reinforcing rib. The reinforcing rib is arranged on the side of the axle cover close to the support shaft and is connected to the axle cover.

9. The shaft cover assembly according to claim 8, wherein, The axle cover includes an axle cover body. The support shaft is connected to the axle cover body, and the flow guide protrusion is formed by a convex hull protruding in the direction away from the support shaft; The axle cover body is provided with a through hole corresponding to the flow guide protrusion. A cavity is formed between the side of the flow guide protrusion close to the support shaft and the axle cover, and the reinforcing rib is arranged in the cavity.

10. The shaft cover assembly according to claim 9, characterized in that, One side of the reinforcing rib close to the flow guide protrusion is connected to the flow guide protrusion; and / or The through hole is annular. The inner end of the reinforcing rib is connected to the inner wall surface of the through hole, and the outer end of the reinforcing rib is connected to the outer wall surface of the through hole.

11. A cross-flow impeller, characterized in that, It includes: An axle cover assembly and an end cover assembly. The axle cover assembly is the axle cover assembly according to any one of claims 1 - 10. The axle cover assembly and the end cover assembly are arranged at intervals along the axial direction of the axle cover; An intermediate fan blade. The intermediate fan blade is arranged between the axle cover assembly and the end cover assembly, and both ends of the intermediate fan blade are respectively connected to the axle cover assembly and the end cover assembly.

12. An electrical device, characterized in that, It includes the cross-flow fan blade according to claim 11.

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