CN220487922U - Fan blade of cooling fan - Google Patents
Fan blade of cooling fan Download PDFInfo
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- CN220487922U CN220487922U CN202322143492.7U CN202322143492U CN220487922U CN 220487922 U CN220487922 U CN 220487922U CN 202322143492 U CN202322143492 U CN 202322143492U CN 220487922 U CN220487922 U CN 220487922U
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- blade
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- fan
- hub
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- 238000001816 cooling Methods 0.000 title claims abstract description 11
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a fan blade of a cooling fan, which comprises: the wind turbine comprises a hub, a plurality of blades which are integrally formed with the hub and uniformly distributed on the outer edge of the hub, and a torus which is connected with all the blades and is used for increasing wind pressure, wherein a gap for air flow to pass through is formed between two adjacent blades, the blades are provided with an arc-shaped front edge, a rear edge, an inner edge and an outer edge, the inner edges of the blades are integrally connected with the circumferential side surface of the hub, and the outer edges of the blades are integrally connected with the circumferential inner side surface of the torus; the value range of the front dip angle a of the front edge of the blade is as follows: 30 ° < a <60 °. After the technical scheme is adopted, the area of the blades can be further increased, so that the rotating speed of the fan is increased, and larger air output can be provided. Meanwhile, when the fan blades rotate, the air outlet range is enlarged, so that the heat radiating area is enlarged, and on the basis of enlarging the air outlet range, the air cutting noise is reduced.
Description
Technical field:
the utility model relates to the technical field of cooling fan products, in particular to a fan blade of a cooling fan.
The background technology is as follows:
the heat dissipation fan plays an extremely important role in the heat dissipation of electronic products, wherein the fan blades have a great influence on the wind pressure and the wind quantity generated by the fan. The existing fan blade comprises a hub and a plurality of blades positioned on the periphery of the hub, wherein the inner ends of the blades are respectively fixed on the outer circumference of the hub and are radially arranged by taking the hub as the center, and when the fan blade works, the blades rotate to drive surrounding air to flow, and air flow in the direction of 180 degrees is generated. In addition, the outer edges of the existing fan blades are connected through the circular ring, so that air flow is polymerized in one direction, and 90-degree air flow can be generated.
See Chinese patent number: 202023289927.1 the utility model discloses a fan blade structure with multiple elevation angles and a heat dissipating device, wherein the fan blade is formed by combining a plurality of blades with different elevation angles, the elevation angles of the blades are sequentially reduced outwards along the length direction of the fan blade structure, and the joints among the blades with different elevation angles are provided with smooth parts. When the fan blade rotates, the fan blade can guide air flow in multiple angles, multiple directions and multiple layers, but the fan blade has the following problems: the blades have different elevation angles, are noisier during rotation, and can carry certain vibration.
The applicant has proposed the following patent applications for such fan blades, see chinese patent No.: 202020560116.1, which comprises: the hub is integrally formed with the hub, the blades are uniformly distributed on the outer edge of the hub, an air port for air flow to pass through is formed between two adjacent blades, the outer edge of each blade is integrally connected with a torus for increasing air pressure, and the torus is formed with a plurality of notches corresponding to the air ports one to one. In the technical scheme, the annular body is provided with a plurality of notches which are in one-to-one correspondence with the air openings among the blades and are used for enlarging the air flow area, so that a small amount of air flow can be generated through the notches, and the air flow is dispersed to enlarge the heat dissipation area, so that heat dissipation can be carried out on the components on the side.
In combination with the above, the current direction of improvement of the heat dissipation fan is mainly focused on the following points:
1. on the basis of not changing the whole size of the fan blade, the area of the fan blade is effectively increased, so that larger air output is obtained.
2. Noise generated when the fan blades rotate is reduced.
3. Effectively expands the heat radiation range of the fan blade.
In view of the above, the present inventors have improved on the basis of the existing products and have proposed the following technical solutions.
The utility model comprises the following steps:
the utility model aims to overcome the defects of the prior art and provide a fan blade of a cooling fan.
In order to solve the technical problems, the utility model adopts the following technical scheme: a fan blade of a heat radiation fan comprises: the wind turbine comprises a hub, a plurality of blades which are integrally formed with the hub and uniformly distributed on the outer edge of the hub, and a torus which is connected with all the blades and is used for increasing wind pressure, wherein a gap for air flow to pass through is formed between two adjacent blades, the blades are provided with an arc-shaped front edge, a rear edge, an inner edge and an outer edge, the inner edges of the blades are integrally connected with the circumferential side surface of the hub, and the outer edges of the blades are integrally connected with the circumferential inner side surface of the torus; the starting point of the front edge of the blade is connected with the hub, the ending point of the front edge is connected with the torus, the included angle formed by the connecting line of the starting point of the front edge and the center of the fan blade and the connecting line of the ending point of the front edge and the center of the fan blade is a front inclination angle a, and the value range of the front inclination angle a is as follows: 30 ° < a <60 °.
In the above technical scheme, the gaps are arranged at equal widths, and the distance value is 2-5mm.
Further, in the above technical solution, the front edges of all the blades are flush and lie on the same plane, which is flush or parallel to the top surface of the torus.
Furthermore, in the above technical solution, the trailing edges of all the blades are flush and lie on the same plane, which is parallel to the bottom surface of the torus.
In the above technical solution, the trailing edge and the outer edge of the blade are transited by an arc chamfer, and the radius of the arc chamfer is one half to one third of the axial height of the blade.
In the above technical scheme, the height of the front edge and the rear edge of the blade along the axial direction of the blade is greater than the height of the torus.
Furthermore, in the above technical solution, the ratio of the height of the front edge and the rear edge of the blade along the axial direction of the blade to the height of the torus is: 3:2.
Furthermore, in the above technical solution, the thickness of the blade is in a shape with a slightly bulging middle and thinner sides, i.e. the thickness of the middle area of the blade is greater than the thickness of the blade on one side close to the inner edge and the blade on one side close to the outer edge.
In the above technical solution, the thickness of the blade near the inner edge is greater than the thickness of the blade near the outer edge.
By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
1. the utility model increases the front inclination angle a of the front edge of the blade on the basis of not changing the whole size of the blade, thereby further increasing the area of the blade, and improving the rotating speed of the fan to provide larger air output.
2. In the utility model, the height of the blades along the axial direction of the blades is larger than that of the torus, so that the air outlet angle of the blades in the horizontal direction can be enlarged, the air outlet range is enlarged when the blades rotate, and the heat radiating area is enlarged.
3. In order to further reduce noise generated when the fan blade rotates, the front edge and the rear edge of the fan blade are in flush planes, and meanwhile, the rear edge and the outer edge are in transition through a large-angle circular arc chamfer, so that wind cutting noise is reduced on the basis of expanding the wind outlet range.
Description of the drawings:
FIG. 1 is a front view of the present utility model;
FIG. 2 is a bottom view of the present utility model;
FIG. 3 is a perspective view of the present utility model;
FIG. 4 is a perspective view of another view of the present utility model;
fig. 5 is a perspective view of the present utility model in a sectional state.
The specific embodiment is as follows:
the utility model will be further described with reference to specific examples and figures.
As shown in fig. 1 to 5, the present utility model is a fan blade of a cooling fan, which includes an integrally formed hub 1, a plurality of blades 2 and a torus 3.
The hub 1 is a hollow cylinder, and a rotating shaft 10 is arranged at the center of the center. The blades 2 are uniformly distributed on the circumferential surface of the hub 1. The ring body 3 is used for increasing wind pressure and all the blades 2 and the ring body 3 are fixed into a whole. A gap 20 for the passage of the air flow is formed between two adjacent blades 2. In operation of the present utility model, as shown in connection with fig. 2, air flows from top to bottom through the gap.
In the utility model, all the blades 2 are identical in modeling size, each blade 2 is integrally in a curved arc body, and each blade 2 is provided with a front edge 21, a rear edge 22, an inner edge 23 and an outer edge 24 which are in an arc shape. Wherein the inner edge 23 of the blade 2 is integrally connected to the circumferential side of the hub 1, and the outer edge 24 is integrally connected to the circumferential inner side of the torus 3.
The starting point of the front edge 21 of the blade 2 is connected with the hub 1, the ending point of the front edge 21 is connected with the torus 3, and an included angle formed by the connecting line of the starting point of the front edge 21 and the center of the fan blade and the connecting line of the ending point of the front edge 21 and the center of the fan blade is the front inclination angle a of the front edge 21. Since the blade 2 is not planar, and has a certain height in the axial direction, when the current inclination angle increases, the larger the angle of deflection of the blade 2 is, the area of the blade 2 also increases, and through the test of the inventor, the value range of the forward inclination angle a in the utility model is as follows: 30 ° < a <60 °. In this embodiment, the value range of the pretilt angle a is: 45 ° < a <50 °.
In addition, in order to increase the area of the blades 2, the gap 20 between two adjacent blades 2 may also be reduced. However, if the gap 20 is too small, even if the gap is 0 or the adjacent blades 2 are overlapped, the flow of the air flow is affected, and the heat dissipation efficiency of the fan is reduced, so that the gap 20 is arranged at equal width and the distance is 2-5mm.
In order to reduce wind noise, the leading edges 21 of all the blades 2 are flush and lie in the same plane, which is flush or parallel with the top surface of the torus 3. The trailing edges 22 of all the blades 2 are flush and lie in the same plane, which is parallel to the bottom face of the torus 3. In this embodiment, the plane of the front edges 21 of all the blades 2 is flush with the top surface of the torus 3, and the plane of the rear edges 22 of all the blades 2 is parallel to the bottom surface of the torus 3 and higher than the bottom surface of the torus 3.
In order to increase the air outlet angle of the fan blade and increase the heat dissipation area, the heights of the front edge 21 and the rear edge 22 of the blade 2 along the axial direction of the fan blade are larger than the height of the torus 3. The blades 2 thus form an outwardly diverging outlet flow at the outer edge 24. In this embodiment, the ratio of the height of the front edge 21 and the rear edge 22 of the blade 2 along the axial direction of the blade to the height of the torus 3 is: 3:2. Meanwhile, since the axial height of the blade 2 is greater than the height of the torus 3, wind cutting noise is generated at the joint position of the trailing edge 22 and the outer edge 24 of the blade, and in order to reduce the wind cutting noise, the joint position of the trailing edge 22 and the outer edge 24 of the blade is transited by a circular arc chamfer with a large angle, and in the embodiment, the radius of the circular arc chamfer is one half to one third of the axial height of the blade.
In order to meet the fluid mechanics, as shown in fig. 5, the thickness of the blade 2 is slightly drum in the middle and has a thinner shape on both sides, that is, the thickness of the middle area of the blade 2 is greater than the thickness of the blade on the side close to the inner edge 23 and the blade on the side close to the outer edge 24. Specifically, in this embodiment, the thickness of the blade on the side near the inner edge 23 is greater than the thickness of the blade on the side near the outer edge 24.
After the technical scheme is adopted, the area of the blades can be further increased, so that the rotating speed of the fan is increased, and larger air output can be provided. Meanwhile, when the fan blades rotate, the air outlet range is enlarged, so that the heat radiating area is enlarged, and on the basis of enlarging the air outlet range, the air cutting noise is reduced.
It is understood that the foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, but rather is to be accorded the full scope of all such modifications and equivalent structures, features and principles as set forth herein.
Claims (9)
1. A fan blade of a heat dissipation fan, comprising: hub (1), with hub (1) integrated into one piece and evenly distributed in a plurality of blades (2) of hub (1) outer fringe to and be connected with all blades (2) and be used for increasing ring body (3) of wind pressure, be formed with clearance (20) that are used for the air current to pass through between two adjacent blades (2), its characterized in that:
the blade (2) is provided with an arc-shaped front edge (21), a rear edge (22), an inner edge (23) and an outer edge (24), wherein the inner edge (23) of the blade (2) is integrally connected with the circumferential side surface of the hub (1), and the outer edge (24) is integrally connected with the circumferential inner side surface of the torus (3);
the starting point of the front edge (21) is connected with the hub (1), the ending point of the front edge (21) is connected with the torus (3), and an included angle formed by a connecting line of the starting point of the front edge (21) and the center of the fan blade and a connecting line of the ending point of the front edge (21) and the center of the fan blade is a front inclination angle a of the front edge (21), wherein the value range of the front inclination angle a is as follows: 30 ° < a <60 °.
2. The fan blade of a cooling fan as claimed in claim 1, wherein: the gaps (20) are arranged at equal widths, and the distance value is 2-5mm.
3. The fan blade of a cooling fan as claimed in claim 1, wherein: the leading edges (21) of all blades (2) are flush and lie on the same plane, which is flush or parallel to the top surface of the torus (3).
4. The fan blade of a cooling fan as claimed in claim 1, wherein: the trailing edges (22) of all the blades (2) are flush and lie on the same plane, which is parallel to the bottom face of the torus (3).
5. The fan blade of claim 4, wherein: the trailing edge (22) and the outer edge (24) of the blade are in transition through an arc chamfer, and the radius of the arc chamfer is one half to one third of the axial height of the blade.
6. The fan blade of a cooling fan as claimed in claim 1, wherein: the heights of the front edge (21) and the rear edge (22) of the blade (2) along the axial direction of the blade are larger than the height of the torus (3).
7. The fan blade of claim 6, wherein: the ratio of the height of the front edge (21) and the rear edge (22) of the blade (2) along the axial direction of the blade to the height of the torus (3) is as follows: 3:2.
8. A fan blade of a heat dissipation fan according to any of claims 1-7, wherein: the thickness of the blade (2) is in a shape with a slightly-bulging middle and thinner two sides, namely, the thickness of the middle area of the blade (2) is larger than the thickness of one side of the blade close to the inner edge (23) and one side of the blade close to the outer edge (24).
9. The fan blade of claim 8, wherein: the thickness of the side of the blade close to the inner edge (23) is larger than that of the side of the blade close to the outer edge (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322143492.7U CN220487922U (en) | 2023-08-09 | 2023-08-09 | Fan blade of cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322143492.7U CN220487922U (en) | 2023-08-09 | 2023-08-09 | Fan blade of cooling fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220487922U true CN220487922U (en) | 2024-02-13 |
Family
ID=89828417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322143492.7U Active CN220487922U (en) | 2023-08-09 | 2023-08-09 | Fan blade of cooling fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220487922U (en) |
-
2023
- 2023-08-09 CN CN202322143492.7U patent/CN220487922U/en active Active
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