Wind wheel assembly, fan assembly and fan

Abstract

The present invention provides a wind wheel assembly, a fan assembly and a fan. The wind wheel assembly includes: a hub body; a flow passage disposed in the hub body; a plurality of blades arranged along the circumferential direction of the hub body, and the blades are disposed in the flow passage; along the flow direction of the fluid, one end of the flow passage is an air inlet, and the other end of the flow passage is an air outlet. The width dimension of the air inlet is L1, and the width dimension of the air outlet is L2, wherein 1 ≤ L1 / L2 ≤ 1.875. The technical solution of the present invention solves the problem of small air output of the wind wheel assembly in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular, to a wind wheel assembly, a fan assembly, and a fan. Background Art

[0002] The air outlet of a bladeless fan is achieved by a high-speed fan hidden in the base, and the structure of its airfoil is one of the important components. Thus, the structure of the wind wheel is related to the air volume performance of the entire unit. In the prior art, the wind wheel generally only optimizes the angle of the blades, and there are mostly problems of small air output. Summary of the Invention

[0003] The main object of the present invention is to provide a wind wheel assembly, a fan assembly, and a fan to solve the problem of small air output of the wind wheel in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, a wind wheel assembly is provided, including: a hub body; a flow passage provided in the hub body; a plurality of blades arranged along the circumferential direction of the hub body, and the blades are arranged in the flow passage; along the flow direction of the fluid, one end of the flow passage is an air inlet, and the other end of the flow passage is an air outlet. The width dimension of the air inlet is L1, and the width dimension of the air outlet is L2, where 1 ≤ L1 / L2 ≤ 1.875.

[0005] Further, the width dimension L1 of the air inlet and the width dimension L2 of the air outlet satisfy the following formula: 20 mm ≤ L1 ≤ 30 mm, 16 mm ≤ L2 ≤ 20 mm.

[0006] Further, from the air inlet to the air outlet, the blade includes a first blade segment, a second blade segment, and a third blade segment connected in sequence. The thickness dimension of the first blade segment is H1, the thickness dimension of the second blade segment is H2, and the thickness dimension of the third blade segment is H3, where H1 ≤ H2, H3 ≤ H2.

[0007] Further, along the direction away from the second blade segment, the thicknesses of the first blade segment and the third blade segment both gradually decrease.

[0008] Further, the thickness dimension H1 of the first blade segment, the thickness dimension H2 of the second blade segment, and the thickness dimension H3 of the third blade segment satisfy the following formula: 0.5 mm < H1 < 1.5 mm, 1 mm ≤ H2 ≤ 1.5 mm, 0 mm < H3 < 0.5 mm.

[0009] Further, the blade has an air-facing side and a back-facing side arranged oppositely. A spoiler is provided at one end of the third blade segment away from the second blade segment, and the spoiler has a curved surface protruding toward the back-facing side.

[0010] Further, the spoiler further has a windward surface opposite to the curved surface, and the distance between the curved surface and the windward surface is C, where 2 mm ≤ C ≤ 3 mm.

[0011] Further, the hub body includes an inner hub and an outer hub arranged at intervals, an air flow passage is formed between the outer wall surface of the inner hub and the inner wall surface of the outer hub, and a plurality of blades are evenly arranged at intervals along the circumferential direction of the inner hub.

[0012] According to another aspect of the present invention, there is provided a fan assembly, including a driving motor and the above-mentioned wind wheel assembly connected to the output shaft of the driving motor.

[0013] According to another aspect of the present invention, there is provided a fan, including a base and the above-mentioned fan assembly arranged in the base.

[0014] Applying the technical solution of the present invention, by optimizing the ratio of the width dimensions of the air inlet and the air outlet, the air flow enters the air flow passage from the air inlet with a larger width, so that the air intake can be increased, and the air flow does work through the blades to form a high-speed and high-pressure air flow flowing out from the air outlet. In this way, the air output of the wind wheel can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 shows a schematic structural diagram of the wind wheel assembly of the embodiment of the present invention;

[0017] Figure 2 shows Figure 1 the rear view of the wind wheel assembly;

[0018] Figure 3 shows Figure 2 the sectional view of the wind wheel assembly;

[0019] Figure 4 shows Figure 1 the side view of the wind wheel assembly;

[0020] Figure 5 shows Figure 4 the sectional view of the wind wheel assembly;

[0021] Figure 6 shows Figure 1 the schematic connection structure diagram of the blade and the inner hub of the wind wheel assembly;

[0022] Figure 7 shows Figure 6 the left view of the wind wheel assembly; and

[0023] Figure 8 shows the front view of the wind wheel assembly Figure 6 of

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 10. Hub body; 11. Inner hub; 12. Outer hub; 30. Flow passage; 31. Air inlet; 32. Air outlet; 40. Blade; 41. First blade segment; 42. Second blade segment; 43. Third blade segment; 44. Spoiler; 45. Curved surface; 46. Windward surface. Detailed implementation manners

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] It should be noted that in the embodiments of the present invention, the width dimension L1 of the air inlet 31 refers to Figure 5 the distance between the outer edge of the inner hub 11 and the inner edge of the outer hub 12 along the radial direction of the hub body 10; the width dimension L2 of the air outlet 32 refers to Figure 5 the distance between the outer edge of the inner hub 11 and the inner edge of the outer hub 12 along the radial direction of the hub body 10 (or along the direction perpendicular to the air outlet direction).

[0028] As Figures 1 to 5 shown, the embodiments of the present invention provide a wind wheel assembly. The wind wheel assembly includes a hub body 10, a flow passage 30, and a plurality of blades 40. Among them, the flow passage 30 is arranged on the hub body 10; the plurality of blades 40 are arranged along the circumferential direction of the hub body 10, and the blades 40 are arranged in the flow passage 30; along the flow direction of the fluid, one end of the flow passage 30 is the air inlet 31, and the other end of the flow passage 30 is the air outlet 32. The width dimension of the air inlet 31 is L1, and the width dimension of the air outlet 32 is L2, where 1 ≤ L1 / L2 ≤ 1.875.

[0029] In the above setting, by optimizing the ratio of the width dimensions of the air inlet 31 and the air outlet 32, in this way, the air flow enters the flow passage 30 from the air inlet 31 with a larger width dimension, so that the air intake can be increased, and the air flow in the flow passage 30 does work through the blades 40, and a high-speed and high-pressure air flow is formed and flows out from the air outlet 32 with a smaller dimension. In this way, the air output of the wind wheel can be increased.

[0030] Preferably, in the embodiments of the present invention, the ratio of L1 / L2 is 1.38. In this way, a relatively large air output can be ensured.

[0031] As Figure 5As shown, in the embodiment of the present invention, the width dimension L1 of the air inlet 31 and the width dimension L2 of the air outlet 32 satisfy the following formula: 20mm ≤ L1 ≤ 30mm, 16mm ≤ L2 ≤ 20mm.

[0032] In the above settings, by determining the width dimension L1 of the air inlet 31 and the width dimension L2 of the air outlet 32 within the above ranges, the air volume output of the wind wheel can be increased more effectively, and moreover, the size of the wind wheel assembly can be ensured to be smaller.

[0033] Preferably, in the embodiment of the present invention, the width dimension L1 of the air inlet 31 is 23.5mm, and the width dimension L2 of the air outlet 32 is 17mm.

[0034] As Figure 6 and Figure 7 shown, in the embodiment of the present invention, from the air inlet 31 to the air outlet 32, the blade 40 includes a first blade segment 41, a second blade segment 42, and a third blade segment 43 that are sequentially connected. The thickness dimension of the first blade segment 41 is H1, the thickness dimension of the second blade segment 42 is H2, and the thickness dimension of the third blade segment 43 is H3. Among them, H1 ≤ H2, H3 ≤ H2.

[0035] In the above settings, the thickness dimensions of both the first blade segment 41 and the second blade segment 42 of the blade 40 are smaller than the thickness dimension of the second blade segment 42. Therefore, the flow velocities of the air flow through the first blade segment 41, the second blade segment 42, and the third blade segment 43 are different. In this way, a time difference will be generated at the confluence of the air flow, thereby reducing the energy of the eddy current, avoiding the formation of large eddy currents, and further reducing the aerodynamic noise generated by the blade. That is to say, through the above settings, the noise can be reduced, thereby ensuring that the wind wheel assembly of the present invention has the advantage of low noise.

[0036] It should be noted that in the embodiment of the present invention, as Figure 6 shown, the thickness dimension H1 of the first blade segment 41 refers to the dimension in the circumferential direction of the first blade segment 41, H3 refers to the dimension in the circumferential direction of the third blade segment 43, and the second blade segment 42 is located in the middle of the blade 40, and its thickness is the thickest part of the blade 40.

[0037] As Figure 7 shown, in the embodiment of the present invention, along the direction away from the second blade segment 42, the thicknesses of both the first blade segment 41 and the third blade segment 43 gradually decrease.

[0038] Through the above settings, the surface of the blade can be made smoother, and the second blade segment 42 can effectively connect and transition the first blade segment 41 and the third blade segment 43. In this way, the blade 40 can have better flow guiding ability, thereby reducing the energy loss of the air flow during the process of flowing through the blade, and further increasing the air volume output of the wind wheel.

[0039] As Figure 6 shown, in the embodiments of the present invention, the thickness dimension H1 of the first blade segment 41, the thickness dimension H2 of the second blade segment 42, and the thickness dimension H3 of the third blade segment 43 satisfy the following formula: 0.5 mm < H1 < 1.5 mm, 1 mm ≤ H2 ≤ 1.5 mm, 0 mm < H3 < 0.5 mm.

[0040] In the above technical solution, the thicknesses of the first blade segment 41 and the third blade segment 43 of the blade 40 are less than the thickness of the second blade segment 42. In this way, it can be ensured that the eddy current formed when the air flow flows in from the air inlet 31 through the end of the first blade segment 41 and at the tail of the blade 40 (i.e., the end of the third blade segment 43) is smaller, thereby reducing the aerodynamic noise generated by the blade 40.

[0041] Preferably, in the embodiments of the present invention, the value of the thickness dimension H1 of the first blade segment 41 is 1 mm, the value of the thickness dimension H2 of the second blade segment 42 is 1.1 mm, and the value of the thickness dimension H3 of the third blade segment 43 is 0.1 mm. Through the above settings, after the air flow enters the flow passage through the air inlet, it is guided by the first blade segment 41, the second blade segment 42, and the third blade segment 43 in sequence, and finally the eddy current formed at the tail of the third blade segment 43 is smaller, thereby ensuring that the aerodynamic noise generated by the wind wheel assembly is smaller.

[0042] The inventor tested the air output of the wind wheel assembly of the above embodiments (where the number of blades is 8, L1 = 23.5 mm, L2 = 17 mm), and the obtained simulation results are shown in Table 1.

[0043] Table 1

[0044] 12th gear 11th gear 10th gear <![CDATA[Air volume (m 3 / h)]]> 112.7 105.6 98.6 Noise (dB) 50.9 49.6 47.8

[0045] The following Table 2 shows the test results of the air output of the wind wheel assembly of the prior art:

[0046] Table 2

[0047] 12th gear 11th gear 10th gear <![CDATA[Air volume (m 3 / h)]]> 142.7 129.3 116.1 Noise (dB) 50.8 49.2 48.1

[0048] By comparing the air volume data in Table 1 and Table 2 above, it can be seen that by optimizing the ratio of the width dimensions of the air inlet 31 and the air outlet 32, the air output of the wind wheel assembly is significantly increased, and it has a good noise reduction effect; therefore, the wind wheel assembly of the embodiments of the present invention has the advantages of large air volume and low noise.

[0049] As Figure 8As shown, in an embodiment of the present invention, the blade 40 has a windward side and a leeward side that are oppositely arranged. A spoiler 44 is provided at one end of the third blade segment 43 that is far from the second blade segment 42. The spoiler 44 has a curved surface 45 that protrudes toward the leeward side.

[0050] In the above setting, a position where the blade 40 is provided with the spoiler 44 can form a vortex. In this way, the interaction of vortices between the windward side and the leeward side can be effectively reduced, thereby reducing the aerodynamic vortex noise.

[0051] As Figure 8 shown, in an embodiment of the present invention, the spoiler 44 further has a windward surface 46 opposite to the curved surface 45. The distance between the curved surface 45 and the windward surface 46 is C, where 2 mm ≤ C ≤ 3 mm.

[0052] In the above setting, setting the distance between the curved surface 45 and the windward surface 46 between 2 mm and 3 mm enables a vortex to be formed between the curved surface 45 and the windward surface 46. Thus, it can play a role in disturbing the flow at the confluence of the airflow, and further can more effectively reduce the interaction of vortices between the windward side and the leeward side, reducing the aerodynamic vortex noise.

[0053] Preferably, in an embodiment of the present invention, the value of C is 2.1 mm.

[0054] Preferably, in an embodiment of the present invention, the windward surface 46 can be a plane or a concave curved surface.

[0055] It should be noted that, in an embodiment of the present invention, as Figure 8 shown, the connection line between the two end points of the end of the spoiler 44 facing the air outlet 32 is N, and the point at the maximum curvature radius of the curve of the end of the spoiler 44 facing the air outlet 32 and facing the leeward side is M. The distance C between the curved surface 45 and the windward surface 46 refers to the distance between the tangent line at point M and the connection line N.

[0056] As Figure 1 shown, in an embodiment of the present invention, the hub body 10 includes an inner hub 11 and an outer hub 12 that are spaced apart. An air flow passage 30 is formed between the outer wall surface of the inner hub 11 and the inner wall surface of the outer hub 12. A plurality of blades 40 are evenly spaced along the circumferential direction of the inner hub 11.

[0057] In the above setting, by arranging a plurality of blades 40 at equal intervals in the air flow passage 30, the uniformity of the flow division of each blade 40 can be ensured, thereby ensuring the stability and consistency of the fluid pressure received by each blade 40, and further effectively ensuring the service life of the guide vane.

[0058] Specifically, as Figure 5As shown, in the embodiment of the present invention, the inner hub 11 is formed by a first horn structure that is integrally hollow and has an outer diameter gradually increasing from top to bottom. The outer hub 12 is formed by a second horn structure that is integrally hollow and has an outer diameter gradually increasing from top to bottom. The outer hub is sleeved on the outer periphery of the inner hub, and an annular flow passage is formed between the outer hub and the inner hub. An air inlet is formed between the upper ends of the outer hub and the inner hub (see specifically Figure 5 ). An air outlet is formed between the lower ends of the outer hub and the inner hub.

[0059] Specifically, in the embodiment of the present invention, one side of the blade 40 is connected to the inner hub 11, and the other side of the blade 40 is connected to the outer hub 12. The plurality of blades 40 divide the flow passage 30 into a plurality of air ducts.

[0060] Preferably, in the embodiment of the present invention, the number of blades 40 is X, and the following formula is satisfied: 6 ≤ X ≤ 12.

[0061] Preferably, in the embodiment of the present invention, the number of blades 40, X, is 8.

[0062] According to another aspect of the present invention, the embodiment of the present invention further provides a fan assembly. The fan assembly includes a driving motor and the above-mentioned wind wheel assembly connected to the output shaft of the driving motor. This fan assembly has all the advantages of the above-mentioned wind wheel assembly, which will not be elaborated here one by one.

[0063] According to another aspect of the present invention, the embodiment of the present invention further provides a fan. The fan includes a base and the above-mentioned fan assembly disposed within the base. This fan has the advantages of high air volume and low noise, and has all the advantages of the above-mentioned fan assembly, which will not be elaborated here one by one.

[0064] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By optimizing the ratio of the width dimensions of the air inlet and the air outlet, the air flow enters the flow passage from the air inlet with a larger width, thereby increasing the air intake volume. And the air flow in the flow passage does work through the blades and forms a high-speed and high-pressure air flow flowing out from the air outlet. In this way, the air output volume of the wind wheel can be increased. Further, by optimizing the structure of the blades, the formation of high-energy large eddies is avoided, thereby reducing the aerodynamic noise generated by the blades.

[0065] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wind wheel assembly, characterized in that, it includes: a hub body (10); a flow passage (30) provided in the hub body (10); a plurality of blades (40) arranged along the circumferential direction of the hub body (10), and the blades (40) are arranged in the flow passage (30); along the flow direction of the fluid, one end of the flow passage (30) is an air inlet (31), the other end of the flow passage (30) is an air outlet (32), the width dimension of the air inlet (31) is L1, the width dimension of the air outlet (32) is L2, wherein, 1≤L1 / L2≤1.875 From the air inlet (31) to the air outlet (32), the blade (40) includes a first blade segment (41), a second blade segment (42) and a third blade segment (43) connected in sequence. The thickness dimension of the first blade segment (41) is H1, the thickness dimension of the second blade segment (42) is H2, and the thickness dimension of the third blade segment (43) is H3, wherein, H1≤H2, H3≤H2; The blade (40) has a windward side and a leeward side arranged oppositely. A spoiler (44) is provided at one end of the third blade segment (43) far from the second blade segment (42), and the spoiler (44) has a curved surface (45) protruding towards the leeward side; The spoiler (44) further has a windward surface (46) opposite to the curved surface (45), and the distance between the curved surface (45) and the windward surface (46) is C, wherein, 2mm≤C≤3mm; The windward surface (46) is a plane or a concave curved surface.

2. The wind wheel assembly according to claim 1, characterized in that, the width dimension L1 of the air inlet (31) and the width dimension L2 of the air outlet (32) satisfy the following formula: 20mm≤L1≤30mm, 16mm≤L2≤20mm.

3. The wind wheel assembly according to claim 1, characterized in that, along the direction away from the second blade segment (42), the thicknesses of the first blade segment (41) and the third blade segment (43) both gradually decrease.

4. The wind wheel assembly according to claim 1, characterized in that, the thickness dimension H1 of the first blade segment (41), the thickness dimension H2 of the second blade segment (42) and the thickness dimension H3 of the third blade segment (43) satisfy the following formula: 0.5mm<H1<1.5mm, 1mm≤H2≤1.5mm, 0mm<H3<0.5mm.

5. The wind wheel assembly according to any one of claims 1 to 4, characterized in that, the hub body (10) includes an inner hub (11) and an outer hub (12) arranged at intervals, and the flow passage (30) is formed between the outer wall surface of the inner hub (11) and the inner wall surface of the outer hub (12), and a plurality of the blades (40) are evenly arranged at intervals along the circumferential direction of the inner hub (11).

6. A fan assembly, characterized in that, Comprising a drive motor and the wind wheel assembly according to any one of claims 1 to 5 connected to the output shaft of the drive motor.

7. A fan, characterized in that it comprises a base and the fan assembly according to claim 6 provided in the base.

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