Axial flow wind wheel and fan equipment
By designing a folded edge structure at the top of the air-conditioning blade, the noise problem caused by the leakage vortex at the blade top is solved, the aerodynamic performance of the wind wheel is improved, the rotation noise is reduced, and the user experience is enhanced.
Patent Information
- Application Number
- CN202423032995.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The leakage vortex at the top of the existing air conditioner blades causes excessive noise and energy loss, affecting the user experience.
A folded edge structure is designed at the blade top, including undulating changes in the folded edge and alternating convex and concave arrangements, to enhance structural strength, improve airflow, and reduce the generation of leakage vortices.
The aerodynamic performance of the wind wheel is improved, the rotation noise is reduced, and the user experience is enhanced.
Smart Images
Figure CN223374704U_ABST
Abstract
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] Air conditioning is a control device used to adjust indoor environmental parameters such as temperature and humidity. As people's requirements for quality of life become higher and higher, people's experience in using air conditioners is also getting higher and higher. The noise problem of air conditioner outdoor unit is one of the factors affecting the user experience and is increasingly receiving attention.
[0003] According to experimental verification and analysis, the interaction between the outer edge of the fan blade and the air guide ring at the blade top is an important cause of the fan blade rotation noise. Secondly, leakage vortexes are prone to appear at the blade top in related technologies, which causes energy loss and also makes the fan blade noise too loud. Utility Model Content
[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.
[0005] To this end, an embodiment of the present invention proposes an axial flow wind wheel, which has high structural strength at the blade tip and can reduce the generation of blade tip leakage vortex, thereby improving the flow condition of the blade tip airflow and reducing rotational noise while improving the aerodynamic performance of the wind wheel.
[0006] The embodiment of the present invention further provides a wind turbine device including the above-mentioned axial flow wind wheel.
[0007] The axial flow impeller of the embodiment of the utility model has an air inlet side and includes:
[0008] wheel hub;
[0009] Multiple blades, each blade including a blade body and a folded edge, the multiple blade bodies are arranged on the outer peripheral side of the hub and are arranged at intervals along the circumference of the hub, the folded edge is arranged at the blade top edge of the blade body, the folded edge extends along the blade top edge and bends toward the wind inlet side, and at least a portion of the folded edge of the folded edge that is away from the blade body fluctuates along the extension direction of the folded edge.
[0010] In some embodiments, the folded edge is provided with a plurality of convex portions and a plurality of concave portions, and the plurality of convex portions and the plurality of concave portions are alternately arranged along the extension direction of the folded edge.
[0011] In some embodiments, the distance between two adjacent protrusions is b, the depth of the concave portion is h, and 0.95≤b / h≤1.05.
[0012] In some embodiments, the protrusion is in the shape of a rectangular tooth, and the concave portion is in the shape of a rectangular groove.
[0013] In some embodiments, the distance between the blade tip edge and the axis of the hub is D, the distance between the folded edge and the axis is D1, and D<D1≤1.1D.
[0014] In some embodiments, the folded edge and the leaf body are smoothly connected.
[0015] In some embodiments, the folded edge has an inwardly concave curved surface facing the axis of the hub, and the inwardly concave curved surface is smoothly connected to and tangentially arranged with the surface of the blade body.
[0016] In some embodiments, the generatrix of the concave surface corresponds to a radius R, 2mm≤R≤5mm.
[0017] In some embodiments, the generatrix of the concave surface corresponds to a central angle a, and the angle range of the central angle a is 60 degrees to 90 degrees.
[0018] In some embodiments, the fold includes a first section and a second section in the extension direction of the fold, the first section is adjacent to the leading edge of the blade, the second section is adjacent to the trailing edge of the blade, and only the fold edge of the second section fluctuates along the extension direction of the fold.
[0019] In some embodiments, in the extension direction along the fold, the ratio of the length dimension of the first segment to the length dimension of the fold is one third.
[0020] 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.
[0021] Beneficial effects: The axial flow wind wheel and the fan equipment of the embodiment of the utility model have high structural strength at the blade tip, and can reduce the generation of blade tip leakage vortex, thereby improving the flow condition of the blade tip airflow, and reducing the rotation noise while improving the aerodynamic performance of the wind wheel. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a three-dimensional schematic diagram of the axial flow wind wheel according to an embodiment of the present utility model.
[0023] Figure 2 It is a schematic diagram of the blade and a partial enlargement of an embodiment of the utility model.
[0024] Figure 3 This is a schematic diagram of the air inlet side of the axial flow wind wheel of the embodiment of the utility model. Figure 1 .
[0025] Figure 4 It is a side view and partially enlarged schematic diagram of the axial flow wind wheel of an embodiment of the present utility model.
[0026] Figure 5 This is a schematic diagram of the air inlet side of the axial flow wind wheel of the embodiment of the utility model. Figure 2 .
[0027] Reference numerals:
[0028] 1-wheel hub; 11-axle;
[0029] 2-leaf blade; 21-leaf body; 211-leaf top edge; 22-folded edge; 221-folded edge; 222-convex part; 223-concave part; 224-concave surface; 225-first section; 226-second section; 227-leading edge; 228-trailing edge. DETAILED DESCRIPTION
[0030] 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.
[0031] The axial flow wind wheel of the embodiment of the present invention has an air inlet side and includes a hub 1 and a plurality of blades 2. For example, Figure 1 As shown, the hub 1 can be generally a cap-shaped structure. In the axial direction along the hub 1, the hub 1 can include a first end and a second end. The first end can be a closed structure, and the second end can be an open structure, wherein the side facing the first end can be the air inlet side of the axial flow wind wheel.
[0032] like Figure 1 As shown, there may be three blades 2, all of which may be disposed on the outer circumference of the hub 1, and the three blades 2 may be evenly spaced along the circumference of the hub 1. The suction surface of the blade 2 may face the wind inlet side.
[0033] Each blade 2 includes a blade body 21 and a folded edge 22. Multiple blade bodies 21 are arranged on the outer peripheral side of the hub 1 and are arranged at intervals along the circumference of the hub 1. The folded edge 22 is arranged at the blade top edge 211 of the blade body 21. The folded edge 22 extends along the blade top edge 211 and bends toward the wind inlet side, and at least part of the folded edge 221 of the folded edge 22 away from the blade body 21 fluctuates along the extension direction of the folded edge 22.
[0034] Specifically, if Figure 1 As shown, each blade 2 includes a blade body 21 and a folded edge 22. The inner side of the blade body 21 can be integrally connected to the hub 1. The blade top edge 211 is the circumferential edge on the blade body 21 arranged opposite to the inner side. The folded edge 22 can be integrally formed at the blade top edge 211 of the blade body 21 by bending, and the folded edge 22 can be distributed along the extension direction of the blade top edge 211.
[0035] like Figure 1 As shown, each fold edge 22 is bent toward the wind inlet side of the blade 2, and the fold edge 221 can be regarded as the outer edge of the fold edge 22 arranged opposite to the above-mentioned blade top edge 211. A part of the fold edge 221 can fluctuate up and down along the extension direction of the fold edge 22. In some other embodiments, all the fold edges 221 can also fluctuate up and down along the extension direction of the fold edge 22.
[0036] The axial flow wind wheel of the embodiment of the present invention can enhance the structural strength of the blade tip of the blade 2 by providing a folded edge 22 at the blade tip edge 211 of each blade body 21, thereby meeting the use requirements for structural strength.
[0037] Secondly, by designing at least part of the folded edge 221 to be in an undulating form, a serrated structure can be formed at the folded edge 221. The serrated structure can effectively change the relative interaction between the blade top and the air guide ring, thereby improving the airflow at the blade top and reducing the generation of leakage vortices at the blade top, thereby improving the aerodynamic performance of the wind blade and reducing the overall rotational noise, thereby enhancing the user experience.
[0038] In some embodiments, the folded edge 22 is provided with a plurality of convex portions 222 and a plurality of concave portions 223 , and the plurality of convex portions 222 and the plurality of concave portions 223 are alternately arranged along the extension direction of the folded edge 22 .
[0039] For example, Figure 2 As shown, the convex portion 222 can be a rectangular tooth shape, the convex portion 222 can be integrally formed on the folding edge 22, and multiple convex portions 222 can be arranged at equal intervals along the extension direction of the folding edge 22, and a concave portion 223 is formed between two adjacent convex portions 222, and the concave portion 223 can be a rectangular groove shape, and multiple concave portions 223 are arranged at equal intervals along the extension direction of the folding edge 22.
[0040] By designing the undulation of the folded edge 22 into the form of a convex portion 222 and a concave portion 223 , the generation of leakage vortices can be further eliminated, thereby further improving the overall aerodynamic performance and reducing the overall rotational noise.
[0041] In some other embodiments, the convex portion 222 may also be a triangular tooth shape, and the concave portion 223 may also be a V-shaped groove, etc.
[0042] In some embodiments, the distance between two adjacent protrusions 222 is b, the depth of the recess 223 is h, and 0.95≤b / h≤1.05.
[0043] For example, Figure 2As shown, along the extension direction of the folded edge 22 (which can also be regarded as the circumferential direction of the axial flow wind wheel), the distance between any two adjacent protrusions 222 is b, and the distance b can also be regarded as the width dimension of the recess 223. The depth dimension h of the recess 223 is the groove depth dimension of the recess 223 along the radial direction of the axial flow wind wheel.
[0044] The ratio of the distance b to the depth dimension h can be 0.95, 0.96, 0.97, 0.99, 1.0, 1.01, 1.02, 1.04, 1.05, etc. Within this size range, while ensuring the structural strength, the generation of leakage vortex can be further eliminated, thereby further enhancing the effect of reducing rotational noise.
[0045] In some embodiments, the distance between the blade tip edge 211 and the axis 11 of the hub 1 is D, the distance between the folded edge 221 and the axis 11 is D1, and D<D1≤1.1D.
[0046] For example, Figure 3 As shown, the axis 11 of the hub 1 is the axis position of the hub 1, and the blade tip edge 211 can be regarded as Figure 3 The distance D can be regarded as the radius of the arc-shaped dotted line B. The folded edge 221 can be regarded as Figure 3 At the position indicated by the dotted line A, the distance D1 can be regarded as the radius corresponding to the arc-shaped dotted line A.
[0047] The distance D1 is always greater than the distance D, and the distance D1 does not exceed 1.1 times the distance D. Thus, the width of the folded edge 22 in the radial direction of the axial flow impeller can be controlled within a reasonable size range, thereby enhancing the structural strength while reducing the impact on the blade body 21 and the like.
[0048] In some embodiments, the folded edge 22 is smoothly connected to the blade body 21. For example, the cross-sectional shape of the folded edge 22 can be J-shaped as a whole, and the folded edge 22 can be integrally formed at the top edge 211 of the blade body 21 by bending. That is, the folded edge 22 and the blade body 21 can be smoothly connected by rounded corners, thereby ensuring the flatness and integrity of the surface of the blade 2 and also eliminating stress concentration.
[0049] In some embodiments, as Figure 4 As shown, the folded edge 22 has an inwardly concave surface 224 facing the axis 11 of the hub 1. The inwardly concave surface 224 is smoothly connected to and tangentially arranged with the surface of the blade body 21. This ensures the smoothness of the connection between the folded edge 22 and the blade body 21 and also plays a role in eliminating stress concentration.
[0050] In some embodiments, the generatrix of the concave curved surface 224 corresponds to a radius R, 2mm≤R≤5mm. For example, the concave curved surface 224 can be formed by translating the generatrix along the circumference of the axial flow wind wheel, such as Figure 4 As shown, the busbar can be generally arc-shaped, and the busbar is located between the blade top edge 211 and the folded edge 221, and the radius R corresponding to the busbar can be specifically 2mm, 3mm, 4mm, 5mm, etc.
[0051] In some embodiments, the generatrix of the concave surface 224 corresponds to the central angle a, and the angle range of the central angle a is 60 degrees to 90 degrees. Figure 4 As shown, the central angle a can be 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 90 degrees, etc.
[0052] The radius R and the center angle a are within the above ranges, which provides data size support for the design of the folded edge 22, improves the convenience of processing and production, and secondly, can further enhance the structural strength and improve the aerodynamic performance.
[0053] In some embodiments, the folded edge 22 includes a first section 225 and a second section 226 in the extension direction of the folded edge 222, the first section 225 is adjacent to the leading edge 227 of the blade 2, and the second section 226 is adjacent to the trailing edge 228 of the blade 2, and only the folded edge 221 of the second section 226 fluctuates along the extension direction of the folded edge 222.
[0054] For example, Figure 5 As shown, the leading edge 227 and the trailing edge 228 are arranged opposite each other in the circumferential direction of the blade 2. The leading edge 227 of the blade 2 can be the concave side of the blade 2, and the trailing edge 228 of the blade 2 can be the convex side of the blade 2. Depending on the specific structure, the folded edge 22 can be divided into a first section 225 and a second section 226 connected in the circumferential direction of the axial flow impeller, wherein the first section 225 is connected to the leading edge 227, and the second section 226 is connected to the trailing edge 228. The multiple protrusions 222 and the multiple recesses 223 can be arranged only on the second section 226.
[0055] In this way, the structural strength of the leading edge 227 of the blade 2 can be ensured, and the situation in which the arrangement of the convex portion 222 and the concave portion 223 has a significant impact on the structural strength of the leading edge 227 is avoided.
[0056] In some embodiments, in the extension direction along the fold 22, the ratio of the length dimension of the first section 225 to the length dimension of the fold 22 is one third. Figure 5As shown, the length of the second section 226 may be substantially twice that of the first section 225, and the length here may be considered the sum of the lengths of the first section 225 and the second section 226. That is, the folded edge 22 in the third portion adjacent to the leading edge 227 may not be provided with the convex portion 222 and the concave portion 223, while the folded edge 22 portion between the first section 225 and the trailing edge 228 may be provided with the convex portion 222 and the concave portion 223.
[0057] Thus, while satisfying the requirement of reducing the impact on the structural strength of the leading edge 227, it also fully ensures the effect of eliminating the generation of leakage vortex, thereby achieving the effect of eliminating, improving aerodynamic performance and reducing noise.
[0058] The following describes the fan equipment according to the embodiment of the present invention.
[0059] The fan device of the embodiment of the present invention includes an axial flow fan wheel, which can be an axial flow fan wheel as described in any of the above embodiments. The fan device can be an indoor unit of an air conditioner. In other embodiments, the fan device can also be an industrial fan, an electric fan, or other fan device.
[0060] The fan equipment of the embodiment of the present invention can effectively change the relative interaction between the blade top and the air guide ring by adding a folded edge 22 at the blade top and performing an undulating design on the folded edge 22, thereby improving the airflow condition of the blade top, reducing the generation of leakage vortex at the blade top, and reducing the rotational noise of the fan equipment while improving the aerodynamic performance of the fan blade.
[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 has an air inlet side and includes: Wheel hub (1); A plurality of blades (2), wherein the blades (2) include a blade body (21) and a folded edge (22), wherein the plurality of blade bodies (21) are arranged on the outer peripheral side of the hub (1) and are spaced apart along the circumference of the hub (1), and the folded edge (22) is arranged on the blade top edge (211) of the blade body (21), and the folded edge (22) extends along the blade top edge (211) and is bent toward the wind inlet side, and at least a portion of the folded edge (221) of the folded edge (22) that is away from the blade body (21) fluctuates along the extension direction of the folded edge (22).
2. The axial flow wind wheel according to claim 1, characterized in that: The folding edge (22) is provided with a plurality of convex portions (222) and a plurality of concave portions (223), and the plurality of convex portions (222) and the plurality of concave portions (223) are alternately arranged along the extension direction of the folding edge (22).
3. The axial flow wind wheel according to claim 2, characterized in that: The distance between two adjacent convex portions (222) is b, the depth dimension of the concave portion (223) is h, and 0.95≤b / h≤1.
05.
4. The axial flow wind wheel according to claim 2, characterized in that: The convex portion (222) is in the shape of a rectangular tooth, and the concave portion (223) is in the shape of a rectangular groove.
5. The axial flow wind wheel according to claim 1, characterized in that: The distance between the blade tip edge (211) and the axis (11) of the hub (1) is D, and the distance between the folded edge (221) and the axis (11) is D1, where D<D1≤1.1D.
6. The axial flow wind wheel according to claim 1, characterized in that: The folded edge (22) and the leaf body (21) are smoothly connected.
7. The axial flow wind wheel according to claim 6, characterized in that: The folded edge (22) has an inwardly concave curved surface (224) facing the axis (11) of the hub (1), and the inwardly concave curved surface (224) is smoothly connected to the surface of the blade body (21) and arranged tangentially.
8. The axial flow wind wheel according to claim 7, characterized in that: The generatrix of the concave curved surface (224) corresponds to a radius R, 2mm≤R≤5mm.
9. The axial flow wind wheel according to claim 7, characterized in that: The generatrix of the concave curved surface (224) corresponds to a central angle a, and the central angle a ranges from 60 degrees to 90 degrees.
10. The axial flow wind wheel according to any one of claims 1 to 9, characterized in that: The folded edge (22) includes a first section (225) and a second section (226) in the extension direction of the folded edge (22), wherein the first section (225) is adjacent to the leading edge (227) of the blade (2), and the second section (226) is adjacent to the trailing edge (228) of the blade (2), and only the folded edge (221) of the second section (226) fluctuates along the extension direction of the folded edge (22).
11. The axial flow wind wheel according to claim 10, characterized in that: In the extension direction along the folded edge (22), the ratio of the length dimension of the first section (225) to the length dimension of the folded edge (22) is one third.
12. A fan device, characterized in that: The utility model comprises an axial flow wind wheel as claimed in any one of claims 1 to 11.