TWI557325B - Fan structure - Google Patents

Description

Fan structure

The present invention relates to a fan structure, and more particularly to a fan structure that can reduce overall thickness and improve performance and reduce noise generation.

In recent years, with the development of the electronics industry, the performance of electronic components has rapidly increased, the processing speed has become faster and faster, and the operation speed of the internal chipset has been continuously increased, and the number of wafers has also increased, while the aforementioned wafers are in operation. The amount of heat emitted is also increased accordingly. If these heat sources are not emitted immediately, the performance of the electronic components will be greatly affected, the processing speed of the electronic components will be reduced, and as the heat accumulates, the electronic components may be burnt, so the heat dissipation has been It is one of the important issues of electronic components, and the use of a cooling fan as a heat sink is a common method.

In the limited system space, the cooling fan used is a small centrifugal fan for heat dissipation. Please refer to FIGS. 1A, 1B and 1C. The centrifugal fan 1 mainly includes a frame 11 and a cover 12 . a fan hub 13 and a plurality of blades 14 disposed outside the fan hub 13, wherein the casing 11 has a air inlet 111, and the cover 12 also has an air inlet 121, and the cover The body 12 is disposed above the frame 11 and is formed with the frame 11 to form an air outlet 112 on the side, and the fan hub 13 and the blade 14 are oppositely disposed on the frame 11 and the cover. Between the bodies 12, the fan blades 14 pass through the blades 14 when they are in operation The rotation drives the surrounding air to flow, and the axial airflow entering from the upper and lower air inlets 111, 121 is diverted from the radial airflow along the fan hub 13 and then discharged from the air outlet 112.

However, in the design of the centrifugal fan 1 product, the air inlet space of the fan hub 13 needs to be reserved, that is, the fan hub 13 and the fan blade 14 are reserved between the cover body 12 and the bottom of the frame body 11. Into the wind space, but the main consideration when using the centrifugal fan is that it requires a thin design, but its reserved air inlet space will increase its overall thickness; or it may need to consider its thin design to reduce the upper and lower air inlet space. The operation performance of the centrifugal fan 1 is affected. Moreover, when the fan hub 13 and the blade 14 are in operation, the cover 12 and the air inlets 111 and 121 of the frame 11 also increase the running noise of the centrifugal fan. Therefore, the conventional disadvantages have the following disadvantages: 1. The design of the thin design is difficult; 2. The operating performance of the fan is affected; 3. The running noise is easily increased.

Therefore, how to solve the above problems and problems in the past, that is, the inventors of this case and the relevant manufacturers engaged in this industry are eager to study the direction of improvement.

Accordingly, in order to solve the above disadvantages of the prior art, the main object of the present invention is to provide a fan structure which can reduce the overall thickness and the lifting performance.

Another object of the present invention is to provide a fan structure that reduces noise generation. In order to achieve the above object, the present invention provides a fan structure, which includes an upper cover and a fan frame and a certain sub-assembly and a hub, the upper cover correspondingly covers the fan frame and collectively defines an accommodation space, and The fan frame has a shaft barrel, and the fan frame has a first side And a second side and a third side and a fourth side, the first side has an air inlet and the third side has an air outlet, and the second side has a first side wall and the fourth side Having a second side wall, the first side wall has a protrusion extending to the air inlet, and the second side wall has a blocking portion, the stator assembly is disposed in the accommodating space and is sleeved An outer portion of the shaft, the hub is disposed in the accommodating space and sleeved outside the stator assembly, and the hub extends outwardly with a plurality of portions, the connecting portion is provided with a plurality of blades at the other end of the hub, and The length of the exhibition portion is greater than the length of the fan blade, whereby the fan structure is formed by the side air inlet and the side air outlet, so that the fan structure can reduce the air inlet space to effectively reduce the overall thickness while maintaining Its thin design and improved operational performance, and at the same time can effectively solve the noise problem caused by the shadowless effect of the upper and lower air inlets, which can effectively reduce the noise generation problem.

2‧‧‧Fan structure

3‧‧‧Upper cover

4‧‧‧Fan frame

41‧‧‧ accommodating space

411‧‧‧ shaft tube

42‧‧‧ first side

43‧‧‧ second side

44‧‧‧ third side

45‧‧‧ fourth side

46‧‧‧Air inlet

47‧‧‧air outlet

48‧‧‧First side wall

481‧‧‧ protrusion

482‧‧‧First expansion space

483‧‧‧First Extension

49‧‧‧Second side wall

491‧‧‧

492‧‧‧Second gradually expanding space

493‧‧‧Second extension

5‧‧‧stator assembly

6‧‧·wheels

61‧‧‧ Exhibition Department

L2‧‧‧ Exhibition length

62‧‧‧ fan leaves

L1‧‧‧ blade length

63‧‧‧Connecting Department

D1‧‧‧First distance

D2‧‧‧Second distance

1A is a schematic exploded view of a conventional one; FIG. 1B is a schematic view of a conventional combination; FIG. 1C is a schematic cross-sectional view of a conventional combination; FIG. 2 is a perspective exploded view of a first preferred embodiment of the present invention; 3 is a partially exploded perspective view of a first preferred embodiment of the present invention; FIG. 4 is a plan view showing a first preferred embodiment of the present invention; and FIG. 5 is a schematic view showing the first preferred embodiment of the present invention. Figure 6 is an exploded perspective view of a second preferred embodiment of the present invention; and Figure 7A is an exploded perspective view of a third preferred embodiment of the present invention; Figure 7B is an exploded perspective view of a third preferred embodiment of the present invention.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

2, 3, and 4 are a perspective exploded view, a partially exploded schematic view, and a plan view of a first preferred embodiment of the fan structure of the present invention. As shown, the fan structure of the present invention is shown. The 2 series includes an upper cover 3 and a fan frame 4 and a certain sub-assembly 5 and a hub 6; wherein the upper cover 3 covers the fan frame 4 and defines an accommodation space 41, and the fan frame 4 is The center of the fan frame 4 has a first side 42 and a second side 43 and a third side 44 and a fourth side 45. The first side 42 has an air inlet 46. The first side wall 48 and the fourth side 45 have a second side wall 49, and the first side wall 48 has a protrusion 481, and the first side wall 48 has a protrusion 481. The protrusion 481 extends from the first side wall 48 toward the air inlet 46, and has a first extension 483 between the protrusion 481 and the air outlet 47, and the second side wall 49 has a blocking portion 491. The portion 491 has a second extension 493 between the air inlet 46 and the air inlet 46.

The stator assembly 5 is disposed in the accommodating space 41 and is disposed outside the shaft 411, and the hub 6 is also disposed in the accommodating space 41 and sleeved outside the stator assembly 5 And the hub 6 extends to the outside with a plurality of extensions 61. The extension 61 is provided with a plurality of blades 62 at the other end of the hub 6, and each of the blades 62 has a blade length L1 between the front end and the rear end. At the position of the blade 62, there is a connecting portion 63 connecting all the blades 62, and the connecting portion 63 causes the blades 62 to be annularly arranged to surround each other, and the connecting portion 63 is simultaneously provided for the The protruding portion 61 is connected to the other end of the hub 6 such that the protruding portion 61 connects all the blades 62 through the connecting portion 63. In the present embodiment, the protruding portion 61 extends from the hub 6 to the connecting portion 63, and The exhibition portion 61 forms a length L2 between the hub 6 and the connecting portion 63, and the length L2 of the extending portion is greater than the length L1 of the blade formed between the front end and the rear end of the blade 62, and the blade 62 is A first diverging space 482 and a first distance D1 are disposed between the first extending portion 483, and a second diverging space 492 and a second distance D2 are disposed between the fan blade 62 and the second extending portion 493. The second diverging space 492 is gradually expanded from the blocking portion 491 toward the air inlet 46, wherein the first distance D1 and the second distance D2 are formed at a horizontal tangent position with the center of the hub 6, and The first distance D1 is greater than twice and at least twice the second distance D2.

Referring to FIG. 5, it is a schematic diagram of a first preferred embodiment of the fan structure of the present invention. As shown in the figure, when the fan structure 2 of the present invention is in operation, the hub 6 and the blade 62 are in the The air in the accommodating space 41 rotates, and the airflow outside the fan structure 2 enters the accommodating space 41 from the air inlet 46 of the first side 42 and is sent out by the air outlet 47 of the third side 44 to reach the fan. The structure of the leaf structure 2 is influenced by the side air inlet and the side air outlet, so that the fan structure 2 can reduce the air inlet space to effectively reduce the overall thickness and at the same time maintain its thin design and improve the operational performance, and at the same time be effective. Solving the noise problem caused by the non-shadowing effect of the upper and lower air inlets can effectively reduce the problem of noise generation, and the airflow through the air inlet 46 and the blade 62 will produce the effect of the first pressurization, and the airflow passes through the fan blade. When the position of the portion 61 between the 62 and the hub 6 is raised and the air outlet 47 is pulled out, a second pressurization is generated, and the blocking portion 491 formed by the second side wall 49 of the fourth side 45 can effectively stop the airflow from flowing back into the air inlet 47. At the tuyere 46, therefore, the fan structure 2 can Hold its slim design and has the effect of lifting operational performance.

Please refer to FIG. 6 , which is an exploded perspective view of a second preferred embodiment of the present invention. The structure and the connection relationship of the preferred embodiment and the functions thereof are substantially the same as those of the first preferred embodiment, and therefore will not be described again. The preferred embodiment is mainly the exhibition of the first preferred embodiment. In a specific implementation, it may be modified to be an annular disk-shaped extension design, and the extension portion extends outward along the outer circumferential side of the hub 6 to form the annular disk-shaped extension portion 61, and the other end of the extension portion 61 Then extending on the connecting portion 63.

7A and 7B are diagrams showing the first and second embodiments of the third preferred embodiment of the present invention; the structure and the connection relationship of the preferred embodiment and the effects thereof are substantially the same as the foregoing first preferred embodiment. The same is not repeated here; as shown in FIG. 7A, the preferred embodiment mainly designs the plurality of blades 62 of the first preferred embodiment to be modified outside the plurality of blades 62 on the connecting portion 63. The ribs are arranged in a staggered manner, that is, the fan blades 62 are partially looped on both end faces of the connecting portion 63, and the non-circularly disposed fan blades 62 disposed at the end faces of the connecting portion 63 are alternately arranged, as shown in FIG. 7B. As shown in the preferred embodiment, the plurality of blades 62 of the first preferred embodiment are modified to be arranged in a staggered arrangement of the plurality of blades 62 on the connecting portion 63, that is, a plurality of blades. The 62 ring is disposed on an upper end surface of the connecting portion 63, and the other portion of the plurality of blades 62 is annularly disposed on the lower end surface of the connecting portion 63, and is disposed in a staggered arrangement with the aforementioned plurality of blades 62.

Therefore, the design that the partial plurality of blades 62 and the other partial plurality of blades 62 are respectively disposed on the upper end surface of the connecting portion 63 and the lower end surface thereof and are staggered with each other can effectively achieve the effect of reducing fan noise. In summary, the fan structure of the present invention can achieve its efficacy and purpose when it is used. Therefore, the invention is an invention with excellent practicability, and is an application for conforming to the invention patent, and submits an application according to law. The committee will grant this case as soon as possible to protect the inventor's hard work. If there is any doubt in the audit committee, please do not hesitate to write a letter. Instructed that the inventor should make every effort to cooperate and be truly sensible.

2‧‧‧Fan structure

3‧‧‧Upper cover

4‧‧‧Fan frame

41‧‧‧ accommodating space

411‧‧‧ shaft tube

42‧‧‧ first side

43‧‧‧ second side

44‧‧‧ third side

45‧‧‧ fourth side

46‧‧‧Air inlet

47‧‧‧air outlet

48‧‧‧First side wall

481‧‧‧ protrusion

483‧‧‧First Extension

49‧‧‧Second side wall

491‧‧‧

5‧‧‧stator assembly

6‧‧·wheels

61‧‧‧ Exhibition Department

62‧‧‧ fan leaves

63‧‧‧Connecting Department

Claims (3)

A fan structure includes: an upper cover; a fan frame, and a corresponding cover of the upper cover to define an accommodation space and has a shaft tube, wherein the fan frame has a first side and a second side and a a third side and a fourth side, the first side has an air inlet and the third side has an air outlet, and the second side has a first side wall and the fourth side has a second side wall, the second side The first side wall has a protrusion extending to the air inlet, and the second side wall has a blocking portion; a certain sub-assembly disposed in the receiving space and sleeved outside the shaft barrel; and a centrifugation a fan hub disposed in the accommodating space and sleeved outside the stator set, and the centrifugal fan hub extends to the outside with a plurality of extensions, the extension being provided with a plurality of blades at the other end of the hub; wherein Between the protrusion and the air outlet, there is a first extension, the first extension and the blade have a first diverging space and a first distance, and between the block and the air inlet Having a second extension, the second extension and the blade a second diverging space and a second distance, and the second diverging space is diverging from the blocking portion toward the air inlet; wherein the first distance and the second distance are opposite to the center of the centrifugal fan hub Formed at a horizontal tangent position, and the first distance is greater than twice or at least twice the second distance. The fan structure of claim 1, wherein the length of the extension is greater than the length of the blade. The fan structure of claim 1, wherein each of the blades has a connecting portion, and each of the blades is circumferentially connected via the first connecting portion, so that the fan blade is annular, and the connecting The other part is connected to the other end of the hub.