CN102478027A - Fan assembly and its flow channel device - Google Patents

Abstract

The present invention provides a flow channel device for a fan, comprising: a side wall, defining a flow channel, the flow channel having a flow channel inlet and a flow channel outlet. The inner wall of the side wall substantially corresponds to the air inlet of the fan. The change in the thickness of the side wall causes the inner diameter of the flow channel to be non-equal, so that the flow channel inlet gradually decreases and then gradually increases from the flow channel inlet to the flow channel outlet, so that the flow channel is gradually contracted and expanded between the flow channel inlet and the flow channel outlet.

Description

Fan assembly and its flow channel device

technical field

The invention relates to a fan and a flow channel device thereof, in particular to a fan and a flow channel device thereof which can reduce noise and improve performance.

Background technique

Generally speaking, the small heat dissipation fan can be equipped with an outwardly extending flow channel device based on the consideration of use. Please refer to FIG. 1 , which is a schematic cross-sectional view of components of a conventional flow channel device and a fan. As shown in FIG. 1 , the assembly 1 of a conventional flow channel device and fan mainly includes a flow channel device 10 and a fan 11. The flow channel device 10 is mainly an inner side wall 101, which is a straight tube having an inner diameter D and being equal. Shaped structure, which is installed at the air inlet 110 of the fan 11, so as to use the flow channel device 10 to adjust the characteristics of the fan, match the size of the installation or improve the safety of use.

However, when the gas enters the conventional flow channel device 10, it is not completely parallel to the inner side wall 101 of the flow channel device 10, in other words, part of the air flow will be formed on the inner side wall 101 of the flow channel device 10 due to the angle of the air intake. The stagnant area not only may cause the gas to swirl back and cause efficiency loss, but also cause the problem of increased noise.

Contents of the invention

The main purpose of the present invention is to provide a flow channel device and its assembly with the fan. The side wall of the flow channel device is an arc surface, and the inner diameter changes to cause the flow channel to gradually shrink and increase, so as to improve the traditional fan assembly. During air intake, part of the airflow forms a stagnant area on the inner wall of the traditional flow channel device, resulting in problems such as reduced fan efficiency and increased noise.

To achieve the above object, an embodiment of the present invention provides a flow channel device for a fan, which includes: a side wall defining a flow channel, and the flow channel has a flow channel inlet and a flow channel outlet. Wherein, the inner wall of the side wall generally corresponds to an air inlet of the fan, and the thickness variation of the side wall causes the inner diameter of the flow channel to be unequal, so that the flow channel inlet gradually decreases and then gradually increases from the flow channel outlet, thereby The flow channel is tapered and expanded between the flow channel inlet and the flow channel outlet.

To achieve the above purpose, another broad embodiment of the present invention provides a fan assembly, which includes: a fan having an air inlet. The flow channel device includes: a side wall defining a flow channel, and the flow channel has a flow channel inlet and a flow channel outlet. A cover body is arranged on the inlet of the flow channel. Wherein, the inner wall of the side wall generally corresponds to the air inlet of the fan, and the thickness variation of the side wall causes the inner diameter of the flow channel to be unequal, so that the flow channel inlet gradually decreases and then gradually increases from the flow channel outlet, thereby The flow channel is tapered and expanded between the flow channel inlet and the flow channel outlet.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a fan assembly of a conventional flow channel device and a fan.

FIG. 2A is a schematic diagram of a fan assembly of the fan and flow channel device according to the first embodiment of the present invention.

Fig. 2B is a sectional view of a-a' of Fig. 2A.

FIG. 3 is a schematic cross-sectional view of the structure of the fan assembly of the flow channel device and the fan according to the second embodiment of the present invention.

FIG. 4 is a comparison chart of air volume, air pressure and decibel characteristics of the flow channel device shown in FIG. 2A and the fan assembly of the fan.

FIG. 5 is a schematic structural diagram of the fan assembly of the flow channel device and the fan according to the third embodiment of the present application.

FIG. 6 is a structural schematic diagram of the flow channel device shown in FIG. 5 in which the cover body is a streamline curved fence.

Description of main components

Fan assembly: 1, 2, 3, 5 Runner device: 10, 20, 30, 50

Fan: 11, 21, 31, 51 Inner wall: 101

Air inlet: 110, 210 Side wall: 201, 301

Fixed part: 2011 Runner entrance: 202, 502

Runner outlet: 203 Runner: 204, 304

The first section: 301a The second section: 301b

The third section: 301c Cover body: 503, 603

Fence: 5031, 6031 Inner diameter: D

Caliber: D1, D2 Blade diameter: D3

Narrowest caliber: D4 Length: H0, H1

Detailed ways

Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention can have various changes in different forms, all of which do not depart from the scope of the present invention, and the description and drawings therein are for illustrative purposes in nature, not to limit the present invention .

Please refer to FIG. 2A and FIG. 2B , wherein FIG. 2A is a schematic view of the fan assembly of the fan and flow channel device according to the first embodiment of the present invention, and FIG. 2B is a cross-sectional view of a-a' of FIG. 2A . As shown in FIG. 2A and FIG. 2B , the fan assembly 2 mainly includes a channel device 20 and a fan 21, wherein the channel device 20 has a side wall 201 and a plurality of fixing parts 2011, and the plurality of fixing parts 2011 are arranged on the side wall 201 , and the flow channel device 20 is installed on the fan 21 by means of a plurality of fixing parts 2011, and the installation method can be screw locking, gluing and buckling. The channel device 20 is a hollow structure, and the side wall 201 defines a channel 204 , and the channel 204 has a channel inlet 202 and a channel outlet 203 , and the inner wall of the side wall 201 corresponds to an air inlet 210 of the fan 21 . The variation of the thickness of the side wall 201 causes the inner diameter of the flow channel 204 to be unequal, that is, the inner diameter of the flow channel 204 between the flow channel inlet 202 and the flow channel outlet 203 gradually decreases and then gradually increases. In this embodiment, the flow channel inlet 202 and the flow channel outlet 203 have diameters D1 and D2 respectively, and the fan 21 has an inner diameter of the fan frame with a diameter D3. The inner diameter of the side wall 201 is an arc surface, and has a narrowest diameter D4 to form a tapered and expanding shape between the runner inlet 202 and the runner outlet 203, and the narrowest diameter D4 can be farther away from the runner outlet 203 , wherein the diameter D1 of the flow channel inlet 202 and the diameter D2 of the flow channel outlet 203 are both greater than the narrowest diameter D4. In addition, the flow channel device 20 of the present invention has a length H0 between the flow channel inlet 202 and the flow channel outlet 203, and the distance from the narrowest diameter D4 to the flow channel outlet 203 is a length H1. The narrow diameter D4 and the length H1 are defined as follows:

0.95*D1＞D4＞0.6*D1

0.95*D2＞D4＞0.6*D2

0.8*H0＞H1＞0.35*H0

It can be seen from the above relationship that the narrowest diameter D4 of the flow channel 204 is substantially between 0.6 times and 0.95 times the diameter D1 of the inlet 202 of the flow channel, and the narrowest diameter D4 is between 0.6 times and 0.95 times the diameter D2 of the outlet 203 of the flow channel. 0.95 times. In addition, the length H0 is between 0.35 times and 0.80 times the length H1 from the narrowest diameter D4 to the flow channel outlet 203 . When the narrowest caliber D4 and the length H1 of the flow channel device 20 conform to the above relational expression, the flow channel device 20 can reduce the noise and improve the fan performance of the fan 21 . When the fan 21 starts, the gas will enter the flow channel 204 from the flow channel inlet 202, and then enter the fan 21 through the flow channel outlet 203. , the stagnation area cannot be formed inside the side wall 201 , so the noise can be greatly reduced and the characteristics of the fan assembly 2 can be improved.

Of course, the side wall 201 of the present invention is not limited to a curved surface. Please refer to FIG. 3 , which is a schematic cross-sectional view of the fan assembly of the fan and flow channel device according to the second embodiment of the present invention. As shown in the figure, the fan assembly 3 mainly includes a channel device 30 and a fan 31 , and the structures and functions of the channel device 30 and the fan 31 are the same as those of the first embodiment, and will not be repeated here. Only the inner diameter of the side wall 301 of the channel device 30 includes a first section 301a, a second section 301b and a third section 301c. As shown in the figure, the first section 301a and the third section 301c are sloped, and the second section 301b is a vertical plane parallel to the flow channel 304 and located between the first section 301a and the third section 301c , so that the channel 304 forms a tapered and expanded shape, so that the gas cannot form a stagnant area inside the side wall 301 to avoid the noise problem.

Please refer to FIG. 4 , which is a characteristic comparison diagram of the air volume, air pressure and decibel of the fan assembly shown in FIG. 2A , wherein the solid lines are respectively the characteristic curves of the air volume and air pressure of the fan assembly 2 of the present invention and the traditional fan assembly 1, The dotted lines are characteristic curves of air pressure and decibels of the fan assembly 2 of the present invention and the conventional fan assembly 1 respectively. Taking the solid line in Figure 4 as an example, when the fan assembly 2 of the present invention has the same air pressure of 0.5inch-H2O as the conventional fan assembly 1, the noise produced by the fan assembly 2 of the present invention can be seen from the dotted line in Figure 4 The decibel value (dB) is obviously lower than the noise decibel value of the traditional assembly 1, that is to say, compared with the traditional technology, the fan assembly 2 of the present invention can effectively reduce the generated noise, so as to achieve the purpose of reducing noise.

Please refer to FIG. 5 , which is a structural schematic diagram of the fan assembly of the flow channel device and the fan according to the third embodiment of the present invention. As shown in the figure, the fan assembly 5 of this embodiment mainly has a flow channel device 50 and a fan 51 and its operation mode and function are similar to those shown in FIG. 2A and FIG. 3 , so details will not be repeated here. Only a cover body 503 is provided on the flow channel inlet 502 of the flow channel device 50, and the cover body 503 is integrally formed and made of materials such as plastic or metal. The cover body 503 is a fence structure, and the cover body 503 can be a square fence 5031, that is, the section shape of the fence 5031 of the cover body 503 is square. The fence shape of the cover body of the present invention is not limited to the square structure shown in Figure 5, please refer to Figure 6, the fence shape of the cover body 603 in this figure can be a streamlined surface fence 6031, but not limited thereto, It can also be implemented forms such as circular arc and stationary leaf fence. In this way, the noise can be reduced, the safety of the fan assembly can be improved, and the damage to the blades of the fan caused by the intrusion of foreign matter can be reduced through the arrangement of the cover.

To sum up, the present invention provides a flow channel device and its fan assembly with a fan. The inner diameter of the side wall of the flow channel device gradually decreases from the flow channel inlet to the flow channel outlet and then gradually increases, so that the flow channel inlet A narrowing and expanding flow channel is formed between the outlet of the flow channel, so that when the gas flows into the flow channel, no gas stagnation area can be formed inside the side wall, so the noise can be greatly reduced, and the characteristics of the fan assembly can be improved. In addition, the present invention can also set a cover at the flow channel inlet of the flow channel device, and by means of different fence shapes of the cover body, the performance of the fan and noise reduction can be further improved, and its safety can be enhanced. Since the above-mentioned advantages are not available in the conventional technology, the structure design of the flow channel device and the fan assembly with the fan of the present invention has great industrial value.

Although the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit, scope and teachings of the present invention. defined by the claims.

Claims (19)

1. a flow passage device is used for a fan, comprises a sidewall; It defines a runner; This runner has runner inlet and the outlet of first-class road, and wherein corresponding to a wind inlet of fan, the varied in thickness of this sidewall causes the internal diameter non-equivalent of this runner to the inwall of this sidewall substantially.

2. flow passage device according to claim 1, wherein this runner inlet is decrescence more cumulative to this runner exit, thereby makes this runner between this runner inlet and this runner exit, be convergent flaring shape.

3. flow passage device according to claim 1, wherein this flow passage device is a hollow structure.

4. flow passage device according to claim 1 and 2, wherein the internal diameter of this sidewall is a cambered surface in fact.

5. flow passage device according to claim 1; Wherein the internal diameter of this sidewall comprises one first section portion, one second section portion and one the 3rd section portion; This first section portion and the 3rd section portion are the inclined-plane in fact, and this second section portion is positioned between this first section portion and the 3rd section portion and is essentially the plane.

6. flow passage device according to claim 1; Wherein the internal diameter of this sidewall has slot footpath; It is away from this runner exit in fact, and this runner inlet calibre is greater than this slot footpath of this runner, and this runner exit bore is greater than this slot footpath of this runner.

7. flow passage device according to claim 6, wherein this slot footpath of this runner is in fact between 0.6 times to 0.95 times of this runner inlet calibre.

8. flow passage device according to claim 6, wherein this slot footpath of this runner is in fact between 0.6 times to 0.95 times of this runner exit bore.

9. flow passage device according to claim 6, wherein this slot footpath of this runner is essentially 0.35 times to 0.80 times of this runner inlet to distance between this runner exit to a distance of this runner exit.

10. flow passage device according to claim 1, it also comprises a plurality of fixing parts, is arranged on this sidewall, so that this flow passage device is installed on this fan by these a plurality of fixing parts.

11. flow passage device according to claim 10, wherein this flow passage device is installed on this fan with screws, gummed or buckle mode.

12. a fan component, it comprises:

One fan has a wind inlet; And

One flow passage device, it comprises a sidewall, and it defines a runner, and this runner has runner inlet and the outlet of first-class road;

Wherein the inwall of this sidewall is substantially corresponding to this wind inlet, and the varied in thickness of this sidewall causes this runner internal diameter non-equivalent.

13. fan component according to claim 12, it comprises that also a cover body is arranged on this runner inlet.

14. fan component according to claim 12, wherein this runner inlet is decrescence more cumulative to this runner exit, thereby makes this runner between this runner inlet and this runner exit, be convergent flaring shape.

15. fan component according to claim 12, wherein this cover body is a fence structure, and the barrier shape of this cover body is square, circular arc, streamline curved surface or stator blade.

16. fan component according to claim 12, wherein this cover body is one of the forming, and is plastics or metal material.

17. fan component according to claim 12, wherein the internal diameter of this sidewall is a cambered surface in fact.

18. fan component according to claim 12; Wherein the internal diameter of this sidewall comprises one first section portion, one second section portion and one the 3rd section portion; This first section portion and the 3rd section portion are the inclined-plane in fact, and this second section portion is positioned between this first section portion and the 3rd section portion and is essentially the plane.

19. fan component according to claim 12; Wherein the internal diameter of this sidewall has slot footpath; It is away from this runner exit in fact, and this runner inlet calibre is greater than this slot footpath of this runner, and this runner exit bore is greater than this slot footpath of this runner.

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