Noise reduction fan blade and fan

Abstract

The utility model discloses a noise reduction fan blade and discloses a fan with the noise reduction fan blade, the noise reduction fan blade comprises a middle wheel body and a plurality of blades, and the middle wheel body is used for being connected with the fan; the multiple blades are sequentially arranged on the radial outer surface of the middle wheel body in the circumferential direction of the middle wheel body and extend outwards, the free ends of the blades are obliquely arranged in the air inlet direction, and the included angle A between the tangent line of the connecting roots of the blades and the middle wheel body and the radial line of the middle wheel body is # imgabs0 #. One surface of one end, far away from the middle wheel body, of each blade towards the air outlet direction is provided with a convex edge. According to the noise reduction fan blade, turbulent flow and vortex generated between the blade and air when the fan blade rotates can be effectively combed, the fluid path is improved, noise is reduced, and the noise reduction fan blade can meet the requirements of some occasions with extremely high noise requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling fans, in particular to a noise-reducing fan blade and a fan. Background Art

[0002] The main function of an axial flow fan is to dissipate heat from equipment or machines. It mainly drives air by rotating blades, thereby generating an air flow. The air flow passes through the equipment or machine to take away the heat of the equipment or machine.

[0003] However, the structural shape design of the existing fan blades is unreasonable, resulting in high noise of the fan, which is difficult to meet some occasions with extremely high noise requirements. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a noise-reducing fan blade, which can effectively comb the turbulence and eddy current generated between the blade and the air when the blade rotates, improve the fluid path, reduce noise, and meet some occasions with extremely high noise requirements.

[0005] The utility model also provides a fan with the above-mentioned noise-reducing fan blade.

[0006] A noise-reducing fan blade according to an embodiment of the first aspect of the utility model includes an intermediate wheel body and a plurality of blades. The intermediate wheel body is used to connect to the fan; the plurality of blades are arranged in sequence along the circumferential direction of the intermediate wheel body on the radial outer surface of the intermediate wheel body and extend outward. The free end of the blade is inclined towards the air inlet direction. The included angle A between the tangent line of the connection root of the blade and the intermediate wheel body and the radial line of the intermediate wheel body is , and one side of the end of the blade far from the intermediate wheel body facing the air outlet direction has a convex edge.

[0007] A noise-reducing fan blade according to an embodiment of the utility model has at least the following beneficial effects:

[0008] 1. By inclining the free end of the blade towards the air inlet direction and setting the included angle A between the tangent line of the connection root of the blade and the intermediate wheel body and the radial line of the intermediate wheel body to be , the guiding of the fluid by the blade is made smoother. Furthermore, on the premise of not losing the air volume performance, the noise can be quickly and effectively reduced.

[0009] 2. By providing a convex edge on the side of the end of the blade far from the intermediate wheel body facing the air outlet direction, the turbulence and eddy current generated between the blade and the air when the blade rotates can be effectively combed, the fluid path can be improved, the energy efficiency ratio of the fan can be increased, and on the premise of not losing the air volume performance, the noise can be quickly and effectively reduced to meet some occasions with extremely high noise requirements.

[0010] According to some embodiments of the present utility model, there are 7 blades provided, and the 7 blades are arranged at equal intervals in sequence along the circumferential direction of the middle wheel body on the radial outer surface of the middle wheel body.

[0011] According to some embodiments of the present utility model, the free end of the blade extends in an arc shape, and the radius R of the inner arc edge of the blade is 50 mm.

[0012] According to some embodiments of the present utility model, the blades are arranged obliquely along the circumferential direction of the middle wheel body.

[0013] According to some embodiments of the present utility model, one side of the convex edge close to the middle wheel body is arranged obliquely.

[0014] According to some embodiments of the present utility model, the inclination angle of one side of the convex edge close to the middle wheel body increases as the height of the convex edge increases.

[0015] According to some embodiments of the present utility model, one side of the middle wheel body facing the air inlet direction has an installation cavity, and the installation cavity is used for installing and connecting a blower.

[0016] According to some embodiments of the present utility model, a plurality of clamping ribs are arranged on the inner side wall of the installation cavity, and the plurality of clamping ribs are in abutting connection and fixation with the rotating part of the driving member of the blower.

[0017] According to some embodiments of the present utility model, one side of the middle wheel body facing the air outlet direction has a plurality of weight reduction grooves.

[0018] According to an embodiment of the second aspect of the present utility model, a blower includes a noise reduction blower fan blade as described in the first aspect of the present utility model, and further includes a fan frame. The fan frame has an installation through groove, and the installation through groove accommodates the fan blade. The inner walls at both ends of the installation through groove are arranged obliquely in a trumpet shape.

[0019] A blower according to an embodiment of the present utility model has at least the following beneficial effects:

[0020] 1. By arranging the free end of the blade to be inclined towards the air inlet direction in the present utility model, the included angle A between the tangent line of the connection root of the blade and the middle wheel body and the radial line of the middle wheel body is , thereby making the guiding of the fluid by the blade more smooth. Furthermore, without sacrificing the air volume performance, the noise can be effectively reduced quickly.

[0021] 2. By providing a convex edge on the side of the blade away from the middle wheel body and facing the air outlet direction, the utility model can effectively comb the turbulence and eddy currents generated between the blade and the air during the rotation of the fan blade, improve the fluid path, increase the energy efficiency ratio of the fan, and quickly and effectively reduce noise without sacrificing the air volume performance, meeting some occasions with extremely high noise requirements.

[0022] 3. By arranging the inner walls at both ends of the installation through groove of the fan frame to be inclined in a flared shape, the utility model can effectively guide the fluid at the air inlet and outlet, reduce the fluid resistance, and lower the noise.

[0023] The additional aspects and advantages of the utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Structural schematic diagram of a fan for an embodiment of the present utility model;

[0026] Figure 2 Structural schematic diagram of another perspective of a fan for an embodiment of the present utility model;

[0027] Figure 3 Structural schematic diagram of a noise-reducing fan blade for an embodiment of the present utility model;

[0028] Figure 4 Structural schematic diagram of another perspective of a noise-reducing fan blade for an embodiment of the present utility model;

[0029] Figure 5 For Figure 3 Shown top view;

[0030] Figure 6 For Figure 5 Shown A-A cross-sectional view.

[0031] Reference numerals: 100 - middle wheel body, 110 - blade, 120 - included angle A, 130 - convex edge, 140 - radius R of the arc inner edge, 150 - installation cavity, 160 - clamping rib, 170 - weight reduction groove, 180 - fan frame, 190 - installation through groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0033] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 therefore should not be construed as a limitation of the present utility model.

[0034] In the description of the present utility model, the meaning of several is one or more, the meaning of a plurality is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and the second are described, this is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed, connected and joined" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] A noise-reducing fan blade and a fan according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0037] Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,the present utility model aims to provide an embodiment of a noise-reducing fan blade and a fan.

[0038] In this embodiment, a fan includes a noise-reducing fan blade and a fan frame 180.

[0039] Specifically, a noise-reducing fan blade mainly includes an intermediate wheel body 100 and several blades 110.

[0040] For the intermediate wheel body 100, the intermediate wheel body 100 is used to connect the fan.

[0041] In some specific embodiments, one side of the intermediate wheel body 100 facing the air inlet direction has an installation cavity 150 for installing and connecting a blower. Thus, the blower can be connected to the intermediate wheel body 100 within the installation cavity 150, thereby reducing the space occupied by the connection structure between the blower and the intermediate wheel body 100 outside the fan blades, making the fan blades and the blower more compact.

[0042] Furthermore, a plurality of ribs 160 are provided on the inner side wall of the installation cavity 150 and are in abutting and fixing connection with the rotating part of the driving member of the blower. Thus, the ribs 160 can quickly clamp the rotating part of the driving member of the blower, thereby improving the installation and fixing assembly efficiency of the fan blades.

[0043] Furthermore, the ribs 160 are arranged to extend along the axial direction of the intermediate wheel body 100, and one end of the rib 160 close to the cavity hole of the installation cavity 150 has an inclined part for guiding the rotating part of the driving member of the blower. Thus, the rotating part of the driving member of the blower can be more easily inserted into the installation cavity 150.

[0044] In some specific embodiments, one side of the intermediate wheel body 100 facing the air outlet direction has a plurality of weight reduction grooves 170, thereby reducing the overall weight of the fan blades, which is beneficial to improving the performance of the blower and reducing noise.

[0045] Refer to Figure 5 and Figure 6 , for the blade 110, a plurality of blades 110 are arranged in sequence along the circumferential direction of the intermediate wheel body 100 on the radial outer surface of the intermediate wheel body 100 and extend outward. The free end of the blade 110 is inclined towards the air inlet direction, and the included angle A120 between the tangent line of the connection root of the blade 110 and the intermediate wheel body 100 and the radial line of the intermediate wheel body 100 is such that the guiding of the fluid by the blade 110 is smoother. Thus, without sacrificing the air volume performance, the noise can be quickly and effectively reduced.

[0046] In some specific embodiments, one side of the end of the blade 110 away from the intermediate wheel body 100 facing the air outlet direction has a convex edge 130, thereby improving the energy efficiency ratio of the blower. Without sacrificing the air volume performance, the noise can be quickly and effectively reduced, meeting some occasions with extremely high noise requirements.

[0047] In some specific embodiments, there are 7 blades 110, and the 7 blades 110 are arranged at equal intervals in sequence along the circumferential direction of the intermediate wheel body 100 on the radial outer surface of the intermediate wheel body 100, so that the distribution of the blades 110 is uniform and the quantity is reasonable.

[0048] In some specific embodiments, the free end of the blade 110 extends in an arc shape, and the radius R140 of the inner arc edge of the blade 110 is 50 mm. Thus, it is convenient for the blade 110 to guide the fluid to blow out.

[0049] In some specific embodiments, the blade 110 is inclined along the circumferential direction of the middle wheel body 100. Thus, when the fan blade rotates, the surface of the blade 110 can abut against the fluid to guide the fluid to blow out.

[0050] In some specific embodiments, the side of the convex edge 130 close to the middle wheel body 100 is inclined. Thus, it is convenient for the fluid to flow along the inclined direction of the convex edge 130 to the air outlet, reducing the resistance of the fluid and lowering the noise.

[0051] According to some embodiments of the present invention, the inclination angle of the side of the convex edge 130 close to the middle wheel body 100 increases as the height of the convex edge 130 increases. Thus, the fluid can better flow along the shape of the fan blade to the air outlet, reducing the collision intensity between the fan blade and the fluid and lowering the noise.

[0052] For the fan frame 180, the fan frame 180 has an installation through slot 190, the installation through slot 190 accommodates the fan blade, and the inner walls at both ends of the installation through slot 190 are inclined in a flared shape.

[0053] It can be understood that in this embodiment, by making the inner walls at both ends of the installation through slot 190 of the fan frame 180 inclined in a flared shape, the fluid at the air inlet and the air outlet can be effectively guided, reducing the resistance of the fluid and lowering the noise.

[0054] In the description of this specification, the description with reference to terms such as "one embodiment, some embodiments, illustrative embodiments, examples, specific examples or some examples" means 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 the present invention. In this specification, the schematic representations 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.

[0055] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A noise-reducing fan blade, characterized in that, Comprising: An intermediate wheel body (100) for connecting to a fan; A plurality of blades (110) arranged in sequence along the circumferential direction of the intermediate wheel body (100) and disposed on the radially outer surface of the intermediate wheel body (100) and extending outward. The free ends of the blades (110) are inclined towards the air inlet direction. The angle A (120) between the tangent line of the connection root of the blade (110) and the intermediate wheel body (100) and the radial line of the intermediate wheel body (100) is such that one side of the end of the blade (110) away from the intermediate wheel body (100) towards the air outlet direction has a convex edge (130).

2. The noise reduction fan blade according to claim 1, characterized in that, There are 7 blades (110) provided, and the 7 blades (110) are arranged in sequence at equal intervals along the circumferential direction of the intermediate wheel body (100) and disposed on the radially outer surface of the intermediate wheel body (100).

3. A noise reduction fan blade according to claim 1, characterized in that, The free ends of the blades (110) extend in an arc shape, and the radius R (140) of the inner arc edge of the blades (110) is 50 mm.

4. A noise-reducing fan blade according to claim 1, characterized in that, The blades (110) are inclined along the circumferential direction of the intermediate wheel body (100).

5. A noise-reducing fan blade according to claim 1, characterized in that, The side of the convex edge (130) close to the intermediate wheel body (100) is inclined.

6. The noise-reducing fan blade according to claim 5, characterized in that, The inclination angle of the side of the convex edge (130) close to the intermediate wheel body (100) increases as the height of the convex edge (130) increases.

7. A noise reduction fan blade according to claim 1, wherein, One side of the intermediate wheel body (100) facing the air inlet direction has an installation cavity (150) for installing and connecting to a fan.

8. A noise-reducing fan blade according to claim 7, characterized in that, The inner side wall of the installation cavity (150) is provided with a plurality of clamping ribs (160), and the plurality of clamping ribs (160) are in abutting connection and fixed with the rotating part of the driving member of the fan.

9. A noise reduction fan blade according to claim 7, characterized in that, One side of the intermediate wheel body (100) facing the air outlet direction has a plurality of weight reduction grooves (170).

10. A fan, characterized in that, A noise reduction fan blade according to any one of claims 1 to 9, further comprising a fan frame (180). The fan frame (180) has an installation through groove (190) for accommodating the fan blade. The inner walls at both ends of the installation through groove (190) are inclined in a flared shape.

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