CN107191411A - Fan structure - Google Patents

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】

The present invention relates to a fan structure, especially a fan structure that can destroy the generation of the vortex of the known fan blades and greatly reduce the vortex intensity, and then change the sound field structure of the vortex to reduce the noise.

【Background technique】

With the continuous advancement of technology, people's dependence on various electronic devices has also increased; however, during operation, the components inside electronic products (such as computers, notebook computers) will generate high heat. If the heat cannot be dissipated in time Out of the electronic products, it is easy to cause overheating problems. Therefore, most electronic products usually use a fan to dissipate heat, so that the electronic products can maintain a certain operating temperature range.

Please refer to Fig. 1, the fan structure 1 known in the industry includes a frame body 10 and a fan wheel 11, the frame body 10 has a base 101 and a ring side wall 102, and the center of the base 101 extends upwards to form a shaft cylinder 103, the fan wheel 11 is correspondingly pivoted in the shaft tube 103, and the fan wheel 11 has a hub 111 and a plurality of fan blades 112, and the fan blades 112 have an upper surface and a lower surface, and the ring side A gap 12 is formed between the wall 102 and the fan blade 112. When the known fan structure 1 is running, according to Bernoulli's law, the airflow pressure on the lower surface will be higher than the airflow pressure on the upper surface, so the airflow will From the lower surface to the upper surface, a large-area vortex 13 will be generated at the structure of the gap 12 formed between the ring side wall 102 and the fan blade 112, and the vortex 13 interacts with the frame 10 The action causes the fan to make a loud noise.

The above, known to have the following disadvantages:

1. Large eddy current;

2. The overall noise of the fan is loud.

Therefore, how to solve the above-mentioned problems and deficiencies that have been used is the direction that the inventor of this case and the relevant manufacturers engaged in this industry want to study and improve urgently.

【Content of invention】

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

A secondary object of the present invention is to provide a fan structure that can greatly reduce the eddy current intensity of the blades of the known fan.

A secondary purpose of the present invention is to provide a fan structure that can change the sound field structure of the vortex to reduce the overall noise.

To achieve the above purpose, the present invention provides a fan structure, which includes a frame and a fan wheel, the frame has a base and a ring side wall, the center of the base extends upwards to form a shaft tube, the ring side The inner wall of the wall is provided with at least one groove, and the fan wheel is correspondingly pivoted in the shaft tube. The fan wheel has a hub and a plurality of fan blades formed outwardly from the circumference of the hub. Each fan blade has an end edge and At least one protrusion extends outward from the end edge, and the protrusion protrudes correspondingly into the groove.

Through the design of this structure of the present invention, the convex portion formed by the extension of the end edge of the fan blade further has an upper surface and a lower surface. When the fan structure is in operation, the lower surface The high-pressure airflow will tumble upward to the upper surface of the low-pressure airflow, and a vortex will be generated due to the pressure difference between the upper and lower surfaces. The generation of eddy currents, in other words, the strength of the eddy currents can be reduced through the protrusions to form smaller eddy currents. Since the eddy currents interact with the frame, they are one of the noise sources of the fan structure. Therefore, due to the large eddy currents The small eddy current structure is formed by the destruction of the convex part, which weakens the strength of the eddy current and then weakens the interaction with the frame to reduce noise, changes the sound field structure of the eddy current, and achieves the effect of greatly reducing the overall noise of the fan structure.

【Description of drawings】

Fig. 1 is a sectional view of a known fan structure and a schematic diagram of a noise sound field;

2A is a three-dimensional sectional view of the first embodiment of the fan structure of the present invention;

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

Fig. 2C is a schematic diagram of the cross-section and the change of the noise sound field of the first embodiment of the fan structure of the present invention;

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

Fig. 3 is the top view of the second embodiment of the fan structure of the present invention;

Fig. 4 is the top view of the third embodiment of the fan structure of the present invention;

Fig. 5 is the top view of the fourth embodiment of the fan structure of the present invention;

Fig. 6 is the top view of the fifth embodiment of the fan structure of the present invention;

Fig. 7 is a sectional view of the sixth embodiment of the fan structure of the present invention;

Fig. 8 is a sectional view of the seventh embodiment of the fan structure of the present invention;

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

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

Fig. 9C is a combined sectional view of the eighth embodiment of the fan structure of the present invention;

Fig. 10A is a three-dimensional exploded view of the ninth embodiment of the fan structure of the present invention;

Fig. 10B is an exploded sectional view of the ninth embodiment of the fan structure of the present invention;

Fig. 10C is a combined sectional view of the ninth embodiment of the fan structure of the present invention.

Description of main symbols:

Fan structure 2

frame 21

upper frame 211

Extension 2111

lower frame 212

Groove 2121

Buckle 213

Hook 214

Base 22

Shaft 221

ring side wall 23

Groove 24

upper open end 241

Lower closed end 242

Upper closed end 243

lower open end 244

fan wheel 25

Hub 251

Fan blade 252

upper surface 2521

lower surface 2522

Edge 2523

Convex part 253

Front end 2531

Mid-end 2532

Rear end 2533

Pitch 26

Vortex 28

Sound field 29.

【detailed description】

The above-mentioned purpose of the present invention and its structural and functional characteristics will be described based on the preferred embodiments of the accompanying drawings.

Please refer to Figures 2A, 2B, 2C, and 2D, which are the three-dimensional sectional view, the sectional view, the schematic sectional view and the top view of the first embodiment of the fan structure of the present invention. As shown in the figure, a fan structure 2 includes a frame 21 And a fan wheel 25, the frame body 21 has a base 22 and a ring side wall 23, the center of the base 22 extends upwards to form a shaft tube 221, and the inner wall of the ring side wall 23 is formed with at least one groove 24 , in this embodiment, the groove 24 is integrally injection-molded and formed on the inner wall of the ring side wall 23;

The aforementioned fan wheel 25 is correspondingly pivotally arranged in the shaft cylinder 221. The fan wheel 25 has a hub 251 and a plurality of fan blades 252 formed outwardly from the periphery of the hub 251. Each fan blade 252 has an end edge 2523 and At least one protrusion 253 extends outward from the end edge 2523, and the protrusion 253 protrudes into the groove 24 correspondingly. The end edge 2523 of the fan blade 252 has a front end 2531, a middle end 2532 and A rear end portion 2533. In this embodiment, the convex portion 253 is formed at the position of the front end portion 2531 for illustration, but it is not limited thereto. In actual implementation, the convex portion can be adjusted according to the needs of users 253, in other words, the convex portion 253 can also be formed at the middle end portion 2532 (as shown in FIG. 3 ) or the rear end portion 2533 (as shown in FIG. 4 );

The shape of the above-mentioned convex portion 253 is described as an airfoil in this embodiment, but it is not limited thereto. In actual implementation, the shape of the convex portion 253 can be adjusted according to the needs of the user. In other words, the shape of the convex portion 253 The shape can also be selected as any one of zigzag shape, arc shape or flat shape, or any combination of various shapes (as shown in Figure 5);

Through the design of this structure of the present invention, the convex portion 253 formed by the extension of 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 During operation, according to Bernoulli's law, the airflow pressure on the lower surface 2522 will be higher than the airflow pressure on the upper surface 2521, so the airflow will naturally roll up from the lower surface 2522 to the upper surface 2521 , and due to the pressure difference between the upper and lower surfaces 2521, 2522, a vortex 28 is generated. At this time, the structure of the convex portion 253 will break the generation of the large vortex 28 of the known fan blade. In other words, The structure of the protrusion 253 can greatly reduce the intensity of the eddy current 28 to form a smaller eddy current 28 .

Since the vortex 28 is one of the noise sources of the fan structure 2 after interacting with the frame body 21, the large vortex 28 is destroyed by the convex portion 253 to form a small or micro vortex 28 structure, which weakens the intensity of the vortex 28 and further The interaction with the frame body 21 is weakened to greatly reduce the noise, and the structure of the sound field 29 of the vortex 28 is changed to greatly reduce the overall noise of the fan structure 2 .

Please refer to FIG. 6 and also refer to FIG. 2D, which is a top view of the fifth embodiment of the fan structure of the present invention. Some elements of the fan structure and the corresponding relationship between the elements are the same as the aforementioned fan structure, so here No more details, but the main difference between this fan structure and the aforementioned is that the convex portion 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 the convex portion 253 and the convex portion 253 can be formed at the same time. At least one interval 26 is formed between them, and the interval 26 can be equidistant (as shown in Figure 6 ) or unequal, or can also be set as continuous or discontinuous. Through the structure of this embodiment, it can also be achieve the aforementioned effects.

Please refer to FIG. 7 and also refer to FIG. 2A, which is a sectional view of the sixth embodiment of the fan structure of the present invention. Some elements of the fan structure and the corresponding relationship between the elements are the same as the aforementioned fan structure, so we will not repeat them here. Again, the main difference between this fan structure and the foregoing is that one end of the groove 24 on the inner wall of the ring side wall 23 forms an upper open end 241, while the other end forms a lower closed end 242, and the convex portion 253 Correspondingly protruding between the upper open end 241 and the lower closed end 242, through the structure of this embodiment, the aforementioned effects can also be achieved.

Please refer to FIG. 8 and also refer to FIG. 2A, which is a side sectional view of the seventh embodiment of the fan structure of the present invention. Some elements of the fan structure and the corresponding relationship between the elements are the same as the aforementioned fan structure, so here No more details, but the most important difference between this fan structure and the aforementioned is that one end of the groove 24 on the inner wall of the ring side wall 23 forms an upper closed end 243, while the other end forms a lower open end 244, and the convex portion 253 protrudes correspondingly between the upper closed end 243 and the lower open end 244 , and through the structure of this embodiment, the aforementioned effects can also be achieved.

Please refer to Figures 9A, 9B, and 9C, which are three-dimensional exploded views, disassembled sectional views, and combined sectional views of the eighth embodiment of the fan structure of the present invention. Some elements of the fan structure and the corresponding relationship between the elements are the same as the aforementioned fan structure , so I won’t go into details here, but the most important difference between this fan structure and the aforementioned is that the frame body 21 has an upper frame 211 and a lower frame 212, and the inner periphery of the upper frame 211 protrudes downward to form an extended part 2111, the inner wall of the lower frame 212 forms a groove 2121, and the corresponding combination of the extension part 2111 and the groove 2121 forms the aforementioned groove 24. In other words, in this embodiment, the formation of the groove 24 is not Integral molding, but formed through the corresponding combination of the upper and lower frames 211, 212, and the combination of the upper and lower frames 211, 212 can be selected as bonding or snapping or buckling or locking or interference Or other equivalent methods are covered within the scope of the present invention, through the structure of this embodiment, the aforementioned effects can also be achieved.

Please refer to Figures 10A, 10B, and 10C, which are perspective exploded views, disassembled sectional views, and combined sectional views of the ninth embodiment of the fan structure of the present invention. Some elements of the fan structure and the corresponding relationship between the elements are the same as the aforementioned fan structure , so I won’t go into details here, but the main difference between the structure of this fan and the above is that the outer side wall of the upper frame 211 has a plurality of buckles 213, and the outer side wall of the lower frame 212 has a plurality of hooks 214. The buckle portion 213 is correspondingly engaged with the hook portions 214, and through the structure of this embodiment, the aforementioned effects can also be achieved.

As stated above, the present invention has the following advantages compared to the known ones:

1. Significantly reduce the eddy current intensity;

2. Change the sound field structure of the vortex;

3. Significantly reduce the overall noise of the fan.

The present invention has been described in detail above, but what is described above is only a preferred embodiment of the present invention, and should not limit the scope of the present invention. That is, all equivalent changes and modifications made according to the application scope of the present invention shall still fall within the scope of the patent of the present invention.

Claims (11)

1. A fan structure, characterized in that, comprising: A frame body has a base and a ring side wall, the center of the base extends upwards to form a shaft tube, and the inner wall of the ring side wall is provided with at least one groove; and A fan wheel is correspondingly pivoted in the shaft tube. The fan wheel has a hub and a plurality of fan blades formed outwardly from the circumference of the hub. Each fan blade has an end edge and at least one blade extends outward from the end edge. The protrusion protrudes correspondingly in the groove. 2. The fan structure according to claim 1, wherein the end edge of the fan blade has a front end, a middle end and a rear end, and the protrusion can be formed on the front end or Either the middle end or the rear end. 3. The fan structure according to claim 2, wherein the protrusions can be formed on the front end and the rear end at the same time, and at least a distance is formed between the protrusions, the distance Can be equidistant or unequal. 4 . The fan structure according to claim 1 , wherein the shape of the protrusion can be any one of airfoil shape, zigzag shape, arc shape or flat plate shape. 5. The fan structure according to claim 1, wherein the groove further forms an upper open end and a lower closed end, and the convex portion protrudes correspondingly between the upper open end and the lower closed end . 6. The fan structure according to claim 1, wherein the groove further forms an upper closed end and a lower open end, and the convex portion protrudes correspondingly between the upper closed end and the lower open end . 7. The fan structure according to claim 1, wherein the groove is integrally formed on the inner wall of the ring side wall. 8 . The fan structure according to claim 1 , wherein the frame body further has an upper frame and a lower frame, and the upper frame and the lower frame are correspondingly combined to form the groove. 9. The fan structure according to claim 8, wherein the inner periphery of the upper frame protrudes downward to form an extension, the inner wall of the lower frame forms a groove, and the extension and the groove The grooves are formed in corresponding combinations. 10 . The fan structure according to claim 9 , wherein the combination of the upper frame and the lower frame is selected as any one of bonding, snapping, buckling, locking or interference. 11 . 11. The fan structure according to claim 9, wherein the outer side wall of the upper frame further has a plurality of buckles, and the outer side wall of the lower frame further has a plurality of hooks, and the buckles correspond to the hooks .