CN107191411B

CN107191411B - Fan structure

Info

Publication number: CN107191411B
Application number: CN201710181718.9A
Authority: CN
Inventors: 张栢灏; 陈佑慈; 王仲澍
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2017-03-24
Filing date: 2017-03-24
Publication date: 2021-07-27
Anticipated expiration: 2037-03-24
Also published as: CN107191411A

Abstract

A fan structure comprises a frame body and a fan wheel, wherein the frame body is provided with a base and an annular side wall, the center of the base extends upwards to form a shaft cylinder, the inner wall of the annular side wall is provided with at least one groove in an annular mode, the fan wheel is correspondingly pivoted in the shaft cylinder, the fan wheel is provided with a hub and a plurality of fan blades formed by the periphery of the hub outwards, each fan blade is provided with an end edge and at least one convex part extending outwards from the end edge, the convex part correspondingly protrudes into the groove, through the design of the structure, the generation of the fan blade vortex of the known fan can be damaged by the convex part, the vortex intensity is greatly reduced, and the sound field structure of the vortex is changed to achieve the effect of reducing the whole noise of the fan.

Description

Fan structure

[ technical field ] A method for producing a semiconductor device

The present invention relates to a fan structure, and more particularly, to a fan structure capable of destroying the vortex generation of the blades of the known fan and greatly reducing the strength of the vortex, so as to change the sound field structure of the vortex and reduce the noise.

[ background of the invention ]

With the continuous progress of science and technology, the dependence of people on various electronic devices is increased; however, when the electronic product is operated, the components inside the electronic product (such as a computer and a notebook computer) generate high heat, and if the heat cannot be conducted out of the electronic product in time, the problem of overheating is easily caused, so that most of the electronic products usually use a fan therein for heat dissipation, so that the electronic product can be operated in a certain operating temperature range.

Referring to fig. 1, a fan structure 1 of the prior art includes a frame 10 and a fan wheel 11, the frame 10 has a base 101 and a circular sidewall 102, the center of the base 101 extends upward to form a shaft 103, the impeller 11 is correspondingly pivoted in the shaft 103, the impeller 11 has a hub 111 and a plurality of blades 112, and the blades 112 have an upper surface and a lower surface, a gap 12 is formed between the annular sidewall 102 and the fan blades 112, and when the conventional fan structure 1 is in operation, according to bernoulli's law, the airflow pressure on the lower surface is higher than that on the upper surface, so that the airflow will tumble upward from the lower surface to the upper surface, and a large-area vortex 13 will be generated at the gap 12 structure formed between the annular sidewall 102 and the fan blades 112, and the vortex 13 interacts with the frame 10 to generate a large noise.

As described above, the following disadvantages are known:

1. the eddy current is large;

2. the fan is overall noisy.

Therefore, how to solve the above problems and disadvantages is the direction in which the present inventors and related manufacturers in this industry are eagerly to research and improve.

[ summary of the invention ]

Therefore, to effectively solve the above problems, the main object of the present invention is to provide a fan structure capable of destroying the generation of the blade vortex of the known fan.

The secondary objective of the present invention is to provide a fan structure capable of greatly reducing the strength of the vortex of the blades of the conventional fan.

The secondary objective of the present invention is to provide a fan structure capable of changing the sound field structure of the vortex and further reducing the overall noise.

To achieve the above object, the present invention provides a fan structure, which comprises a frame and a fan wheel, wherein the frame has a base and a ring side wall, the center of the base extends upward to form a shaft, the inner wall of the ring side wall is provided with at least one groove, the fan wheel is correspondingly pivoted in the shaft, the fan wheel has a hub and a plurality of blades formed outward from the periphery of the hub, each blade has an end edge and at least one protrusion extending outward from the end edge, and the protrusion protrudes into the groove correspondingly.

Through the design of the structure of the present invention, the convex portion formed by extending the edge of the fan blade, and the fan blade further has an upper surface and a lower surface, when the fan structure is in operation, the high pressure of the airflow on the lower surface will tumble upwards to the upper surface with low pressure of the airflow and generate a vortex due to the pressure difference between the upper and lower surfaces, at this time, the structure of the convex part will destroy the generation of large vortex of the fan blades of the known fan, in other words, the strength of the vortex can be reduced by the convex part to form smaller vortex, because the vortex is one of the noise sources of the fan structure after interacting with the frame, the large vortex is destroyed by the convex part to form a small vortex structure, so that the strength of the vortex is weakened, the interaction with the frame is weakened, the noise is reduced, the sound field structure of the vortex is changed, and the effect of greatly reducing the whole noise of the fan structure is achieved.

[ description of the drawings ]

FIG. 1 is a cross-sectional view of a conventional fan and a noise sound field;

FIG. 2A is a perspective cross-sectional view of a fan structure according to a first embodiment of the present invention;

FIG. 2B is a cross-sectional view of the first embodiment of the fan structure of the present invention;

FIG. 2C is a schematic cross-sectional view and a schematic view illustrating a change in noise sound field of the fan structure according to the first embodiment of the present invention;

FIG. 2D is a top view of the first embodiment of the fan structure of the present invention;

FIG. 3 is a top view of a fan structure according to a second embodiment of the present invention;

FIG. 4 is a top view of a fan structure according to a third embodiment of the present invention;

FIG. 5 is a top view of a fan structure according to a fourth embodiment of the present invention;

FIG. 6 is a top view of a fifth embodiment of a fan structure according to the present invention;

FIG. 7 is a cross-sectional view of a sixth embodiment of a fan structure of the present invention;

FIG. 8 is a cross-sectional view of a seventh embodiment of a fan structure of the present invention;

FIG. 9A is an exploded perspective view of an eighth embodiment of a fan structure according to the present invention;

FIG. 9B is an exploded cross-sectional view of an eighth embodiment of a fan structure of the present invention;

FIG. 9C is an assembled cross-sectional view of an eighth embodiment of the fan structure of the present invention;

FIG. 10A is an exploded perspective view of a ninth embodiment of the fan structure of the present invention;

FIG. 10B is an exploded cross-sectional view of a ninth embodiment of the fan structure of the present invention;

FIG. 10C is an assembled cross-sectional view of a ninth embodiment of the fan structure of the present invention.

Description of the main symbols:

fan structure 2

Frame body 21

Upper frame 211

Extension 2111

Lower frame 212

Groove 2121

Clasp part 213

Hook 214

Base 22

Shaft tube 221

Annular side wall 23

Groove 24

Upper open end 241

Lower closed end 242

Upper closed end 243

Lower open end 244

Fan wheel 25

Wheel hub 251

Fan blade 252

Upper surface 2521

Lower surface 2522

End edge 2523

Convex part 253

Front end 2531

Middle end 2532

Rear end 2533

Spacing 26

Vortex 28

A sound stage 29.

[ detailed description ] embodiments

The above objects of the present invention, together with the structural and functional features thereof, are best understood from the following description of the preferred embodiments when read in connection with the accompanying drawings.

Referring to fig. 2A, 2B, 2C, and 2D, which are a three-dimensional cross-sectional view, a cross-sectional schematic view, and a top view of a first embodiment of a fan structure according to the present invention, as shown in the drawings, a fan structure 2 includes a frame 21 and a fan wheel 25, the frame 21 has a base 22 and a ring-shaped sidewall 23, a central portion of the base 22 extends upward to form a shaft cylinder 221, an inner wall of the ring-shaped sidewall 23 is formed with at least one groove 24, in this embodiment, the groove 24 is integrally formed on the inner wall of the ring-shaped sidewall 23 by injection molding;

the aforesaid fan wheel 25 is correspondingly pivoted in the shaft 221, the fan wheel 25 has a hub 251 and a plurality of blades 252 formed outward from the periphery of the hub 251, each blade 252 has an end 2523 and extends outward from the end 2523 to form at least one protrusion 253, the protrusion 253 correspondingly protrudes into the groove 24, the end 2523 of the blade 252 has a front end 2531, a middle end 2532 and a rear end 2533, in this embodiment, the protrusion 253 is formed at the position of the front end 2531, but not limited thereto, in practical implementation, the position of the protrusion 253 can be adjusted according to the requirement of the user, in other words, the protrusion 253 can also be formed at the middle end 2532 (as shown in fig. 3) or the rear end 2533 (as shown in fig. 4);

the shape of the protruding portion 253 is described as a wing shape in the present embodiment, but not limited to this, in practical implementation, the shape of the protruding portion 253 can be adjusted according to the requirement of the user, in other words, the shape of the protruding portion 253 can be selected as any one of a saw-tooth shape, an arc shape, or a flat shape, or any combination of various shapes (as shown in fig. 5);

through the design of the structure of the present invention, the protrusion 253 formed by extending the end edge 2523 of the fan blade 252, and the fan blade 252 further has an upper surface 2521 and a lower surface 2522, when the fan structure 2 operates, according to bernoulli's law, the airflow pressure of the lower surface 2522 is higher than the airflow pressure of the upper surface 2521, so the airflow naturally rolls upward from the lower surface 2522 to the upper surface 2521, and a vortex 28 is generated due to the pressure difference between the upper and lower surfaces 2521, 2522, and at this time, the generation of the large vortex 28 of the fan blade is broken through the structure of the protrusion 253, in other words, the strength of the vortex 28 can be greatly reduced by the structure of the protrusion 253 to form a smaller vortex 28.

Since the vortex 28 interacts with the frame 21 to become one of the noise sources of the fan structure 2, the large vortex 28 is destroyed by the protrusions 253 to form a small or micro vortex 28 structure, so that the strength of the vortex 28 is weakened, the interaction with the frame 21 is weakened, the noise is greatly reduced, the sound field 29 structure of the vortex 28 is changed, and the effect of greatly reducing the overall noise of the fan structure 2 is achieved.

Referring to fig. 6 and fig. 2D together, which is a top view of a fifth embodiment of the fan structure of the present invention, the corresponding relationship between some elements of the fan structure is the same as the fan structure, and therefore will not be described herein, but the most important difference between the fan structure and the above is that the protrusion 253 can be formed on the front end portion 2531 and the rear end portion 2533 of the end edge 2523 at the same time, and at least one space 26 is formed between the protrusion 253 and the protrusion 253, where the space 26 may be equidistant (as shown in fig. 6) or unequal, or may be continuous or discontinuous, and the above-mentioned effects can also be achieved through the structure of this embodiment.

Please refer to fig. 7 and fig. 2A, which is a cross-sectional view of a sixth embodiment of the fan structure of the present invention, wherein the corresponding relationship between the components of the fan structure is the same as the fan structure, and therefore will not be described herein, but the main difference between the fan structure and the above-mentioned structure is that an upper open end 241 is formed at one end of the groove 24 of the inner wall of the annular sidewall 23, a lower closed end 242 is formed at the other end, and the protrusion 253 correspondingly protrudes between the upper open end 241 and the lower closed end 242, and the above-mentioned effects can also be achieved through the structure of this embodiment.

Please refer to fig. 8 and fig. 2A, which is a side sectional view of a seventh embodiment of the fan structure of the present invention, wherein the corresponding relationship between the components of the fan structure is the same as the above-mentioned fan structure, and therefore will not be described herein again, but the most important difference between the fan structure and the above-mentioned structure is that one end of the groove 24 of the inner wall of the annular sidewall 23 forms an upper closed end 243, the other end forms a lower open end 244, and the protrusion 253 correspondingly protrudes between the upper closed end 243 and the lower open end 244, and through the structure of this embodiment, the above-mentioned effects can also be achieved.

Please refer to fig. 9A, 9B, and 9C, which are an exploded perspective view, an exploded sectional view, and an assembled sectional view of an eighth embodiment of the fan structure of the present invention, wherein the corresponding relationship between some components of the fan structure is the same as the fan structure, and therefore will not be described herein again, but the main difference between the fan structure and the above is that the frame body 21 further includes an upper frame 211 and a lower frame 212, the inner periphery of the upper frame 211 protrudes downward to form an extending portion 2111, the inner wall of the lower frame 212 forms a groove 2121, the extending portion 2111 and the groove 2121 are correspondingly combined to form the groove 24, in other words, the groove 24 is not formed integrally in this embodiment, but is formed by correspondingly combining the upper frame 211 and the lower frame 212, and the combining manner of the upper frame 211 and the lower frame 212 can be selected as adhesion, engagement, interference, or other equivalent manners, through the structure of this embodiment, the aforementioned effects can also be achieved.

Please refer to fig. 10A, 10B, and 10C, which are an exploded perspective view, an exploded sectional view, and a combined sectional view of a ninth embodiment of the fan structure of the present invention, wherein the corresponding relationship between some components of the fan structure is the same as the fan structure, and therefore will not be described herein again, but the most important difference between the fan structure and the above is that the outer sidewall of the upper frame 211 further has a plurality of fastening portions 213, the outer sidewall of the lower frame 212 further has a plurality of hook portions 214, and the fastening portions 213 correspondingly fasten the hook portions 214, and the above-mentioned effects can also be achieved through the structure of this embodiment.

As mentioned above, the present invention has the following advantages over the prior art:

1. the strength of the eddy current is greatly reduced;

2. changing the sound field structure of the eddy current;

3. the overall noise of the fan is greatly reduced.

The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made according to the scope of the present invention should also be covered by the claims of the present invention.

Claims

1. A fan structure, comprising:

a frame body having a base and a ring side wall, wherein the center of the base extends upward to form a shaft cylinder, and the inner wall of the ring side wall is provided with at least one groove; and

a fan wheel, which is correspondingly pivoted in the shaft cylinder, the fan wheel is provided with a hub and a plurality of fan blades formed outwards from the periphery of the hub, each fan blade is provided with an end edge and at least one convex part extending outwards from one part of the end edge, the convex part, but not the whole end edge, correspondingly protrudes in the groove, so that the convex part can destroy the generation of large vortex of the fan blade of the known fan,

wherein, in the cross section, a step is formed between the convex part and the end edge.

2. The fan structure as claimed in claim 1, wherein the end edges of the fan blades have a front end portion, a middle end portion and a rear end portion, and the protrusion is formed on either the front end portion, the middle end portion or the rear end portion.

3. The fan structure according to claim 2, wherein the convex portions are formed at the front end portion and the rear end portion simultaneously, and at least one distance is formed between the convex portions, and the distance may be equal or different.

4. The fan structure as claimed in claim 1, wherein the shape of the protruding portion is one of an airfoil shape, a saw-tooth shape, an arc shape and a flat plate shape.

5. The fan structure as claimed in claim 1, wherein the recess further defines an upper open end and a lower closed end, and the protrusion correspondingly protrudes between the upper open end and the lower closed end.

6. The fan structure as claimed in claim 1, wherein the recess further defines an upper closed end and a lower open end, and the protrusion correspondingly protrudes between the upper closed end and the lower open end.

7. The fan structure as claimed in claim 1, wherein the groove is integrally formed on an inner wall of the annular sidewall.

8. The fan structure as claimed in claim 1, wherein the frame further has an upper frame and a lower frame, and the upper frame and the lower frame are correspondingly combined to form the recess.

9. The fan structure as claimed in claim 8, wherein the inner periphery of the upper frame protrudes downwardly to form an extension, the inner wall of the lower frame forms a groove, and the extension and the groove correspondingly combine to form the groove.

10. The fan structure as claimed in claim 9, wherein the upper frame and the lower frame are bonded or engaged or buckled or locked or interfered.

11. The fan structure as claimed in claim 9, wherein the outer wall of the upper frame further has a plurality of fastening portions, and the outer wall of the lower frame further has a plurality of hook portions, and the fastening portions are correspondingly fastened to the hook portions.