CN2651940Y - Heat dissipation structure - Google Patents

Abstract

The utility model discloses a heat dissipation structure, which is applied to an electronic device provided with heat dissipation fans arranged in series. The inner wall of the body is arranged in series. The anti-reverse valve includes a frame, more than one support and the valve. The frame is arranged between the cooling fan and the inner wall of the housing on which it is installed, and the support is arranged on the frame. , to form a plurality of nests together with the frame, one end of the valve is arranged on one side of the frame, and is closer to the air outlet direction of the cooling fan than the support, so when any cooling fan stops running, the air inside the electronic device can flow out in a positive direction The outside thereof balances the pressure so that the heat dissipation efficiency of the electronic device is not excessively reduced.

Description

Heat dissipation structure

technical field

The utility model relates to a heat dissipation structure, which is applied to an electronic device provided with cooling fans arranged in series, in particular to allow the air inside the electronic device to flow out of the electronic device in a positive direction when any cooling fan stops running. The heat dissipation structure balances the pressure so that the heat dissipation efficiency of the electronic device is not excessively reduced.

Background technique

Currently, electronic devices have become a necessity in people's lives. During the use of electronic devices, heat is generated, so the electronic devices are equipped with cooling fans to bring out the hot air in the electronic devices through the rotation of the fan blades, so that the electronic devices can maintain a proper temperature and operate normally . Of course, when more delicate electronic devices are used, more heat will be generated, so improving the heat dissipation efficiency of the electronic devices has become a very important issue.

Please refer to the pressure-flow diagram shown in Figure 1. During the test, the cooling fan is placed in a storage tank, and a hole is opened in the storage tank. When the hole is completely blocked, the maximum The pressure difference (minimum flow), on the contrary, after the hole is completely released, the minimum pressure difference (maximum flow) at both ends of the cooling fan can be obtained. Therefore, the curve shown in Figure 1 is the maximum pressure that the cooling fan can overcome, and the intersection of the curve and the pressure axis is the point of the maximum pressure difference, and the intersection of the curve and the flow axis is the point of the minimum pressure difference. The area covered by the shafts together is the air volume that the cooling fan can deliver. When two good cooling fans are arranged in the electronic device and arranged in series, the pressure-flow curve is A, which has better heat dissipation efficiency; when only one good cooling fan is set in the electronic device, the pressure- The flow curve is B, which has the second-best heat dissipation efficiency; when two cooling fans arranged in series are arranged in the electronic device, and when the cooling fan closer to the inside of the electronic device stops running, the pressure-flow curve is C, which has sub-optimal Poor heat dissipation efficiency; when two cooling fans arranged in series are arranged in the electronic device, and the cooling fan closer to the outside of the electronic device stops operating, the pressure-flow curve is D, which has the worst heat dissipation efficiency.

It can be seen from the above introduction that in most cases, more than two good cooling fans arranged in series are arranged in the electronic device to improve the cooling efficiency, but when any cooling fan stops running, the cooling efficiency will decrease. It is inferior to the situation where only one heat dissipation fan is installed in the electronic device. This is due to the fact that when any heat dissipation fan stops, the air inside the electronic device cannot flow out of it in a positive direction, so the pressure difference between the inside and the outside will increase. Reduce the heat dissipation efficiency of electronic devices. In view of this, there is also a design to speed up the speed of another cooling fan when any cooling fan stops running, so that the heat dissipation efficiency (curve A) of two good cooling fans arranged in series is the same as that of any cooling fan. The heat dissipation efficiency (curves C and D) of the cooling fans when they stop running are relatively close, that is, when the two cooling fans arranged in series are in good condition and either of them stops running, the difference in heat dissipation efficiency will not be too large. Of course, the design that makes the curve A closer to the curves C and D is also the direction that the industry is currently working on.

Contents of the invention

The main purpose of the present utility model is to provide a heat dissipation structure, which is applied to an electronic device provided with cooling fans arranged in series, so that when any cooling fan stops running, the air inside the electronic device can flow out of the electronic device in a positive direction. Externally, the pressure is balanced so that the heat dissipation efficiency of the electronic device is not excessively reduced.

In order to achieve the above purpose, the utility model provides a heat dissipation structure, which is characterized in that it includes: a housing; more than two cooling fans are respectively arranged on the inner wall of the housing and arranged in series; and A non-reverse valve, which includes: a frame, arranged between the heat dissipation fan and the inner wall surface of the housing on which it is arranged; more than one supporting member, arranged on the frame, and forming a plurality of sockets together with the frame a nest; and a valve, one end of which is arranged on one side of the frame, closer to the direction of the air outlet of the cooling fan than the supporting member.

According to the heat dissipation structure disclosed by the utility model, it includes a housing, heat dissipation fans arranged in series and anti-reverse valves. The anti-reverse valve includes a frame, a support and a valve. The support frame is arranged on the frame to form a plurality of nests together with the frame. One end of the valve is arranged on one side of the frame. When the air flows from the nest to the valve in the forward direction, The valve separates the support, and when the air flows back to the valve, the valve is attached to the support, so when the utility model is applied to the cooling fan of the electronic device, and when any cooling fan stops running, the air inside the electronic device It can positively flow out of the outside to balance the pressure, so that the heat dissipation efficiency of the electronic device will not be excessively reduced.

By means of setting the non-return valve between the heat dissipation fan and the inner wall of the housing where it is installed, and completely surrounding the periphery of the heat dissipation fan, and the valve is closer to the air outlet direction of the heat dissipation fan than the support, it can stop at any heat dissipation fan. During operation, the air inside the electronic device is allowed to flow out of the electronic device in a positive direction to balance the pressure so that the heat dissipation efficiency of the electronic device is not excessively reduced. Of course, the same effect can also be achieved when the anti-reverse valve does not completely surround the periphery of the cooling fan.

Based on the above, if more than two heat dissipation fans arranged in series are arranged in the electronic device, and when any heat dissipation fan stops running, the anti-return valve of the present utility model will not reduce the heat dissipation efficiency of the electronic device too much. .

In order to further understand the purpose, structural features and functions of the present utility model, the detailed description is as follows in conjunction with the accompanying drawings.

Description of drawings

Figure 1 is a pressure-flow diagram;

Fig. 2 is an exploded view of the anti-reverse valve of the present invention;

Fig. 3 is the combination diagram of the anti-reverse valve of the present utility model;

Figure 4A and Figure 4B are action diagrams of the anti-reverse valve of the present invention in different flow directions;

Fig. 5 is a sectional view of the utility model;

Figure 6A, Figure 6B, Figure 6C are side sectional views of the utility model; and

Fig. 7 is another sectional view of the present utility model.

Wherein, the reference signs are explained as follows:

11, 11' frame

12, 12' support

13, 13' valve

14, 14' Nest

20, 20’ cooling fan

30 Shell

31 inner wall surface

Area A

Area B

Area C

Detailed ways

Please refer to FIG. 5 and FIG. 6A, FIG. 6B, and FIG. 6C. According to the utility model, the heat dissipation structure includes a housing 30, cooling fans 20, 20' arranged in series and anti-reverse valves. As shown in Fig. 2, Fig. 3 and Fig. 4A, Fig. 4B, the anti-reverse valve includes a frame 11, 11', supports 12, 12' and valves 13, 13', wherein the supports 12, 12' are arranged on the frame 11 , 11' to form a plurality of nests 14, 14' together with the frames 11, 11'. As for the valves 13, 13', one end is arranged on the side of the frame 11, 11', when the air flows from the nests 14, 14' When the air flows to the valve 13, 13' in the forward direction, the valve 13, 13' separates the support 12, 12', and when the air flows to the valve 13, 13' in the reverse direction, the valve 13, 13' attaches to the support 12, 12 ', so when the utility model is applied to the cooling fans 20, 20' arranged in series in the electronic device, please refer to Fig. 6A, 6B, 6C, and when any cooling fan 20 or 20' stops running, The air inside the electronic device is allowed to flow out of the electronic device in a positive direction, and the pressure is balanced, so that the heat dissipation efficiency of the electronic device is not excessively reduced.

As shown in Fig. 5 and Fig. 6A, Fig. 6B, and Fig. 6C, the sectional view and the side sectional view of the present utility model, the frame 11, 11' is arranged on the cooling fans 20, 20' arranged in series and the housing provided therein 30 between the inner walls 31, and completely surround the cooling fan 20, 20 'periphery, of course, the support 12, 12' and the valve 13, 13' are also located in the above position, and the valve 13, 13' is more than the support 12, 12' are adjacent to the air outlet direction of the cooling fans 20, 20'. The cooling fans 20, 20' also divide the space in the casing 30 into the inside of the casing 30 in area A and the area between the cooling fans 20, the area between the cooling fans 20, 20' in area B, and the cooling fan in area C. 20' and the area outside the housing 30. That is, area A is the area between the inside of the housing and the cooling fan, area B is the area between the cooling fans, and area C is the area between the cooling fan and the outside of the housing.

Therefore, as shown in FIG. 6A, when the cooling fans 20, 20' are in normal operation, the air will flow from the area A through the cooling fan 20, and then through the area B, and then flow through the cooling fan 20', and finally reach the area C. That is, the air will flow forward from the air inlet to the air outlet of the cooling fan 20, 20'. In the process of air flow, the cooling fans 20, 20' in normal operation will drive most of the air to flow forward in the aforementioned direction, and part of the air will also flow forward from the nest 14 to the valve 13 at the same time, making the valve 13 slightly The supporting member 12 is separated, so the air can pass through the heat dissipation fans 20, 20', the nest 14 and the valve 13, and flow in a positive direction from the air inlet to the air outlet.

As shown in Figure 6B, when the cooling fan 20 stops running, it can only allow part of the air to flow through, that is, most of the air originally driven by the cooling fan 20 can no longer be taken away from area A, so area A suddenly The pressure difference with area B increases, thus forcing the valve 13 to separate from the support member 12, and allowing most of the air to flow through the valve 13 from the air inlet to the air outlet in a positive direction, and part of the air flows through the cooling fan 20 to The pressure in the area A is released, the pressure difference between the area A and the area B is reduced, and the heat dissipation efficiency of the electronic device is not excessively reduced.

As shown in Figure 6C, when the cooling fan 20' stops running, it can only allow part of the air to flow through, that is, most of the air originally driven by the cooling fan 20' can no longer be taken away from the area B, so Immediately, the pressure difference between area B and area C increases, thereby forcing the valve 13' to separate from the support member 12', and allowing most of the air to flow forward through the valve 13' from the air inlet to the air outlet, and part of the air flow The cooling fan 20' is used to release the pressure in the area B, reduce the pressure difference between the area B and the area C, and prevent the heat dissipation efficiency of the electronic device from being excessively reduced.

Certainly, another cross-sectional view of the utility model as shown in Fig. 7 makes the frame 11, 11' not completely surround the periphery of the cooling fan 20, 20', so that when any cooling fan 20, 20' stops running, the The air flows in a positive direction from the air inlet to the air outlet through the valves 13 and 13 ′, so as to reduce the pressure difference and prevent the heat dissipation efficiency of the electronic device from being excessively reduced.

Based on the above, when more than two cooling fans 20, 20' arranged in series are arranged in the electronic device, and any cooling fan 20, 20' stops running, the utility model can make the electronic device The heat dissipation efficiency is not lowered excessively.

The above are only preferred embodiments of the present utility model, and are not used to limit the scope of implementation of the present utility model; that is, all equal changes and modifications made according to the patent scope of the utility model are all patents of the utility model covered by the scope.

Claims (2)

1. A cooling structure, characterized in that it comprises: a shell; Two or more cooling fans are respectively arranged on the inner wall of the housing and arranged in series; and A non-reverse valve comprising: A frame is arranged between the cooling fan and the inner wall surface of the housing on which it is arranged; one or more supports disposed on the frame to form a plurality of nests with the frame; and A valve, one end of which is arranged on one side of the frame, is closer to the direction of the air outlet of the cooling fan than the supporting member. 2. The heat dissipation structure according to claim 1, wherein the frame completely surrounds the periphery of the heat dissipation fan.

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