CN101652050A - Wind scooper - Google Patents

Abstract

A wind scooper comprises an air inlet part with an air inlet, an air outlet part with an air outlet opposite to the air inlet, and a heat exchange area arranged between the air inlet and the air outlet, wherein the heat exchange area is provided with an airflow turbulence part adjacent to the air inlet part; when the wind scooper covers the heating element of the main board, the wind scooper and the main board form a wind channel, and the heat exchange area is positioned above the heating element, so that airflow passes through the airflow turbulence part to increase airflow disturbance and strengthen the heat convection effect, and the heat convection coefficient is increased.

Description

Wind shield

technical field

The invention relates to a heat dissipation technology, in particular to a wind guide cover applied to an electronic device.

Background technique

The electronic devices currently used in the market often cause the internal temperature of the electronic device to rise due to frequent use and long operation time, which easily affects the normal operation of the electronic device. At the same time, due to the heating elements contained in the electronic device, such as the central processing unit (Central processing unit, CPU), memory, north bridge chip, and power supply, etc., the computing speed that can be achieved is getting faster and faster, and the data processing capacity is also multiplying. Increase, therefore, often due to high operating temperature and cause failures. In order to prevent the heating element from malfunctioning due to overheating, the current solution in the industry is to install a cooling fan in the electronic device to export the heat energy generated by the heating element to the outside of the electronic device, so as to prevent the heating element from being damaged due to excessive temperature, thereby causing Unstable operation of the electronic device occurs.

However, in the actual heat dissipation process, the method of only exporting heat energy through the cooling fan also has the problem of too slow heat dissipation, which cannot achieve the best heat dissipation effect, and then causes the heating element to be damaged due to excessive temperature; Add a heat dissipation air guide cover to create a flow space, so that the air flow can flow concentratedly, so that the airflow generated by the rotation of the cooling fan is densely passed through the air guide cover to discharge the hot air, and effectively improve the heat dissipation effect of the cooling fan on the heating element; therefore , The air guide cover has become an essential item in the cooling system.

Please refer to Fig. 1A and Fig. 1B, the existing wind guide cover 1 is a hollow cover body, and it comprises a top cover 10 and two sidewalls 11 extending downward along the two opposite sides of the top cover 10, and the wind guide cover 1 two Each end has an air inlet 12 and an air outlet 13 respectively. During use, the air guide cover 1 can be arranged on the main board 14 of the electronic device to cover the heating element 15 of the electronic device, so that the heating element 15 is located in the air guide cover 1 and cooperates with the airflow generated by the cooling fan 16 160 enters through the air inlet 12 and exits through the air outlet 13 to achieve heat dissipation.

However, for the heating element 15, the top cover 10 and the two side walls 11 of the existing air guide cover 1 form a straight flow path, and when the air flow 160 passes through the inside of the air guide cover 1, it only dissipates heat through the flow channel. The heat dissipation speed is limited, so that the temperature of the heating element 15 exceeds a controllable range, so that the heating element 15 is in a dangerous working state.

Therefore, how to find a wind guide cover with higher heat dissipation efficiency to avoid the situation that the heating element works in a dangerous state is an urgent problem to be solved at present.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an air guide cover that can improve heat dissipation efficiency.

Another object of the present invention is to provide a wind guide cover with increased heat transfer coefficient to improve convective heat transfer efficiency.

Another object of the present invention is to provide a wind deflector with reduced wind resistance.

In order to achieve the above and other purposes, the present invention provides an air guide cover, which is applied to a main board provided with a heating element, and the air guide cover covers the heating element to form an air duct with the main board. The air guide cover includes: an air inlet part, There is an air inlet on one side of the air duct; the air outlet has an air outlet on the side of the air duct opposite to the air inlet; and a heat exchange area is located between the air inlet and the air outlet and above the heating element, And the heat exchange area has an air flow turbulent portion adjacent to the air inlet portion.

In the above-mentioned wind guide cover, the air inlet part can also have an airflow downpressing part, which is arranged between the air inlet and the heat exchange area, so that the airflow can be pressed down and concentrated to the heat exchange area; and the heat exchange area can also have The airflow diffuser is arranged between the airflow turbulent part and the air outlet part to reduce the wind resistance of the airflow; and the airflow turbulent part can have a V-shaped hemming structure.

In the aforementioned air guide cover, the air flow turbulent part may have a first slope and a second slope, the first slope is connected to the air inlet part, and is the slope extending downward along the airflow direction on the top inner wall of the heat exchange area. Two slopes are arranged on the rear side of the first slope along the airflow direction, and are slopes on the top inner wall of the heat exchange area inclined upward along the airflow direction. Preferably, the first and second slopes can form a V-shaped hem structure.

According to the above structure, the air turbulence part has a first inclined surface as the basic requirement, and the air inlet part can also have an air flow downward pressure part, which is a downward inclined surface between the air inlet and the air turbulence part, preferably Therefore, the first slope can be connected, and the slope angle of the first slope is the same as that of the first slope.

According to the above structure, the air turbulence part has a second slope as the basic requirement, the heat exchange area can also have an air diffusion part, which is arranged between the second slope and the air outlet part, and the air diffusion part can be the heat exchanger The top inner wall of the hot zone is an inclined plane inclined upwards along the airflow direction, and the inclination angle is the same as that of the second inclined plane. Preferably, the included angle between the airflow diffuser and the horizontal plane may be less than thirty degrees.

As can be seen from the above, the air guide cover of the present invention is designed to form an air flow turbulent part on the heat exchange area. When the air guide cover covers the heating element, the air flow turbulence part forms a relatively narrow air passage with the heating element; In the prior art, when the airflow passes through the narrow air duct, the heat convection effect can be enhanced through the air guide cover, which can achieve the purpose of increasing the convective heat transfer coefficient to improve the convective heat transfer efficiency, and can control the temperature of the heating element. To achieve the purpose of improving heat dissipation efficiency. In addition, through the design of the airflow diffuser in the heat exchange area, the space for the airflow to flow out of the air duct is increased to achieve the purpose of reducing wind resistance.

Description of drawings

1A and FIG. 1B are schematic diagrams of the application of the existing air guide;

Fig. 2A is a perspective view of the first embodiment of the wind guide cover of the present invention;

2B is a schematic diagram of the application of the first embodiment of the air duct of the present invention to an electronic device;

FIG. 3 is a schematic diagram of a second embodiment of the air guide cover of the present invention applied to an electronic device;

FIG. 4 is a schematic diagram of a third embodiment of the wind deflector of the present invention applied to an electronic device.

Description of main component symbols:

1, 2 Wind hood

10. 2a top cover

11. 2b side wall

12,210 air inlet

13,220 Air outlet

14, 4 motherboard

15. 3 Heating elements

16 cooling fan

160 airflow

20 heat exchange zone

200, 200' air turbulence section

201 Air diffuser

200a, 200a' first slope

200b, 200b' second slope

21, 21' into the wind department

211 Airflow lower pressure part

22 Air outlet department

5 fan module

50 cold air flow

6 Air Duct

θ included angle

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

first embodiment

Please refer to FIG. 2A and FIG. 2B , which are schematic diagrams of an embodiment of the wind guide cover of the present invention. The structure of the windshield shown in this embodiment and other embodiments is only illustrative, as long as it is applied to an electronic device with a heating element, including the heat exchange area, the opposite air inlet part and the air outlet part, in this The heat exchange area is provided with an air flow turbulence part, so that the air flow passes through the air flow turbulence part to form a disturbance, all of which are applicable to the present invention.

As shown in Fig. 2A, in this embodiment, the air guide cover 2 is a bottomless cover body composed of a top cover 2a and two side walls 2b extending downward along two opposite sides of the top cover 2a, each side The wall 2b can be integrally formed on the top cover 2a.

The wind guide cover 2 includes: a heat exchange area 20, a relative air inlet 21 and an air outlet 22; the air inlet 21 has an air inlet 210, and the air outlet 22 has an air outlet 220 opposite to the air inlet 210 , the heat exchange area 20 is disposed between the air inlet 210 and the air outlet 220 , and has an air flow turbulent portion 200 adjacent to the air inlet 21 .

As shown in Figure 2B, the air guide cover 2 is applied to an electronic device with a heating element 3, the electronic device includes a main board 4 and a fan module 5, the heating element 3 is arranged on the main board 4, and the air guide The cover 2 covers the heating element 3 and forms an air channel 6 with the main board 4 .

The air inlet 210 is located on one side of the air duct 6, and is connected to the fan module 5, so that the cold air flow 50 generated by the fan module 5 enters the air duct 6 through the air inlet 210, and the air outlet 220 is located on the air duct 6. The side of the channel 6 opposite to the air inlet 210, and the heat exchange area 20 is located above the heating element 3, so that the cold air flow 50 entering from the air inlet 210 can exchange heat with the heating element 3 in the heat exchange area 20, and The hot air flow is formed in the heat exchange area 20 and discharged from the air outlet 220 .

The air flow turbulence part 200 has a first inclined surface 200a and a second inclined surface 200b, the first inclined surface 200a is connected to the air inlet part 21, and is an inclined surface on the top inner wall of the heat exchange area 20 extending downward along the airflow direction, and the The second inclined surface 200b is arranged on the rear side of the first inclined surface 200a along the airflow direction, and is an inclined surface on the inner wall of the top of the heat exchange area 20 along the airflow, and the first and second inclined surfaces 200a, 200b are connected to make the airflow turbulent. The flow portion 200 has a single V-shaped hem structure. Of course, in other embodiments, it can also be a plurality of V-shaped hem structures or concave fold structures of other shapes and numbers, and it is not limited thereto; The bent structure is used to allow the cold air flow 50 entering the heat exchange area 20 to pass through to increase the air flow turbulence, so as to improve the heat transfer coefficient and increase the convective heat transfer efficiency, which is suitable for the air flow turbulence part 200 of the present invention.

Preferably, the airflow turbulence part 200 is arranged adjacent to the air inlet part 21, so that when the airflow just enters the heat exchange area 20, the airflow turbulence is enhanced, the heat transfer coefficient is increased, and the heat exchange effect is better.

Furthermore, it should be noted that, in this embodiment, the electronic device is a server, but not limited thereto, and the air guide cover 2 is set on a heating element 3 such as a memory, but not limited thereto, The heating element 3 can also be a central processing unit, a north bridge chip, a power supply, an integrated circuit (integrated circuit, IC) element, or other heating elements. Since the heating element 3 and the fan module 5 belong to the prior art, and their structures and working principles are well known, it should be understood that what is shown in this embodiment is only illustrative.

Compared with the prior art, the wind guide 2 of this embodiment adopts the design of the airflow turbulence part 200. When the fan module 5 provides the same cold airflow 50, when the cold airflow 50 passes through the heat exchange area 20 When the air flow turbulence is increased by relying on the air flow turbulence part 200, the heat transfer coefficient is improved, and the convective heat transfer efficiency of the heat exchange area 20 is increased.

second embodiment

Please refer to Fig. 3, the difference between the present embodiment and the first embodiment lies in the structure of the heat exchange area 20, and the design of the other related air guide covers 2 is substantially the same, therefore, the same elements and corresponding descriptions will be omitted, and will not be described. To repeat it again, I hereby state it.

As shown in the figure, when the air flow turbulence part 200' of the heat exchange area 20 has two V-shaped folded edge structures, the degree of turbulent flow formed by the cold air flow 50 is increased to increase the heat dissipation effect (described later); and it can be Make the lengths and inclination angles of the two first inclined surfaces 200a, 200a' different or the same, and/or the lengths and inclination angles of the two second inclined surfaces 200b, 200b' be different or the same; of course, in other embodiments , the concave fold length, slope angle, and concave fold depth of each of the V-shaped hem structures can be changed.

The heat exchange area 20 also has an airflow diffuser 201, which is located between the airflow turbulent part 200' and the air outlet part 22, so that the airflow has enough space to flow by enlarging the space of the air duct 6, so as to reduce the The wind resistance of the airflow makes the airflow flow out from the air outlet 220 faster, and then dissipate the heat energy; For the second slope 200b', preferably, the inclination angle of the airflow diffuser 201 and the second slope 200b' is the same; in addition, the angle θ between the airflow diffuser 201 and the horizontal plane is less than thirty degrees.

third embodiment

Please refer to Fig. 4, the difference between the present embodiment and the second embodiment lies in the structure of the air inlet portion 21', and the design of the other related wind guide covers 2 is substantially the same, therefore, the same elements and corresponding descriptions will be omitted, and No more details, hereby state.

As shown in the figure, when the height of the fan module 5 is relatively high relative to the heat source, the height of the air inlet 210 of the air guide cover 2 is also relatively high. The pressure part 211 is provided between the air inlet 210 and the heat exchange area 20, so that the cold air flow 50 generated by the fan module 5 is pressed down and concentrated on the heat exchange area 20, so that the flow velocity of the cold air flow 50 is increased; In the embodiment, the airflow depressing part 211 is a downward inclined surface and is connected to the first inclined surface 200a of the airflow turbulence part 200'. Preferably, the inclination angle between the airflow depressing part 211 and the first inclined surface 200a same.

The air turbulence portion 200' of the second and third embodiments has two V-shaped hemming structures, and a narrow place is formed between each of the V-shaped hemming structures and the heating element 3. Therefore, the cold air flow 50 passing through each of the narrow places can form turbulent flow to improve the heat transfer coefficient, thereby increasing the convective heat transfer efficiency.

In addition, in order to verify the heat dissipation effect of the air guide cover of the present invention and the existing air guide cover, the applicant designed a V-shaped hem structure wind guide cover and designed two V-shaped air guide covers for the existing air guide cover and the present invention. Relevant test experiments have been carried out on the windshield with folded edge structure, and the following table can be obtained through the test experiments, where DIMM 1 to 12 represent different heating elements, F means testing on the front of the heating element, B means testing on the front of the heating element The back is tested, and the standard temperature is equal to 85, which means it cannot exceed 85 degrees.

test location Wind hood without recess A wind deflector with a concave fold Wind hood with two recesses standard temperature DIMM1F 67.7 58.8 57.3 85.0 DIMM1B 79.6 68.8 64.7 85.0 DIMM2F 81.0 73.1 69.0 85.0 DIMM2B 79.7 72.0 69.8 85.0 DIMM3F 78.4 67.9 66.6 85.0 DIMM3B 78.6 72.0 72.7 85.0 DIMM4F 78.8 69.2 69.0 85.0 DIMM4B 81.3 84.8 76.7 85.0 DIMM5F 80.5 87.9 80.1 85.0 DIMM5B 85.2 83.2 80.7 85.0 DIMM6F 82.8 75.1 74.5 85.0 DIMM6B 772 61.6 61.0 85.0 DIMM7F 72.3 87.6 79.6 85.0 DIMM7B 87.7 81.3 73.1 85.0 DIMM8F 90.4 93.0 80.9 85.0 DIMM8B 89.7 91.5 81.7 85.0 DIMM9F 87.8 86.0 77.6 85.0 DIMM9B 84.4 90.1 78.6 85.0 DIMM10F 85.7 81.7 76.6 85.0 DIMM10B 89.9 84.1 76.8 85.0 DIMM11F 94.6 82.4 78.7 85.0 DIMM11B 96.5 84.5 77.9 85.0 DIMM12F 90.4 79.4 83.1 85.0 DIMM12B 76.0 84.8 79.5 85.0

It can be seen from the above table that after adding two V-shaped hemming structures, the airflow disturbance passing through the heating element 3 can be increased, and the temperature drop is generally larger; however, it is not that the more V-shaped hemming structures are added, the heating element 3 3, the greater the temperature drop, in this experiment, the cooling effect of three V-shaped hem structures is similar to that of two V-shaped hem structures.

To sum up, the air guide cover of the present invention adopts the design of the air flow turbulence part. When the air guide cover covers the heating element, the shape of the air duct is changed through the air flow turbulence part, so that the cold air flow passes through the air flow turbulence part. When the airflow disturbance is increased, the thermal convection effect is enhanced, the convective heat transfer coefficient is effectively increased, and the purpose of improving heat dissipation efficiency is effectively achieved.

Furthermore, through the design of the airflow diffuser in the heat exchange area, the flow space of the airflow is increased to achieve the purpose of reducing the wind resistance, and then the hot airflow can be dissipated quickly.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Any person skilled in the art can modify and change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope of the claims.

Claims (12)

1. An air guide cover, which is used in an electronic device with a heating element, the electronic device includes a main board and a fan module, the heating element is arranged on the main board, and the air guide cover covers the heating element and is connected The main board forms an air duct, and it is characterized in that the air guide cover includes: An air inlet part has an air inlet located on one side of the air duct, the air inlet is connected to the fan module, so that the cold airflow generated by the fan module enters the air duct through the air inlet; an air outlet, having an air outlet located on the side of the air duct opposite to the air inlet; and A heat exchange area is located between the air inlet and the air outlet, and is located above the heating element, so that the cold air flow entering through the air inlet can exchange heat with the heating element in the heat exchange area, and The heat exchange area forms a hot air flow and is discharged from the air outlet of the air outlet part. The heat exchange area has an air flow turbulence part, and the air flow turbulence part is adjacent to the air inlet part, so that the heat exchange area enters the heat exchange through the air flow turbulence part. The cold air flow in the zone increases the air flow turbulence and increases the heat transfer coefficient. 2. The wind guide hood according to claim 1, wherein the air inlet part further has an airflow down-pressing part, which is arranged between the air inlet and the heat exchange area, so that the air generated by the fan module The cold air flow is compressed and concentrated to the heat exchange area, so that the flow velocity of the cold air flow increases. 3 . The air guide cover according to claim 1 , wherein the heat exchange area further has an airflow diffusion part, which is arranged between the airflow turbulence part and the air outlet part, so as to reduce the wind resistance of the airflow. 4. The air guide cover according to claim 1, wherein the air flow turbulent part has at least one V-shaped hem structure. 5. The air guide cover according to claim 1, wherein the air flow turbulent part has a first slope and a second slope, the first slope is connected to the air inlet part, and is the top inner wall of the heat exchange area along the air flow. The second slope is arranged on the rear side of the first slope along the airflow direction, and is the slope on which the top inner wall of the heat exchange area slopes upward along the airflow direction. 6. The air guide cover according to claim 5, wherein the first and second slopes form a V-shaped hemming structure. 7 . The air guide cover according to claim 5 , wherein the heat exchange area further has an airflow diffusion part, which is arranged between the second slope of the airflow turbulence part and the air outlet part. 8. The air guide hood according to claim 7, characterized in that: the airflow diffuser is an inclined surface on the top inner wall of the heat exchange area that slopes upward along the airflow direction, and is inclined to the second inclined surface of the airflow turbulent part. same angle. 9. The air guide cover according to claim 8, wherein the angle between the airflow diffuser and the horizontal plane is less than thirty degrees. 10 . The air guide cover according to claim 5 , wherein the air inlet portion further has an airflow downward pressure portion, which is a downwardly inclined surface disposed between the air inlet and the airflow turbulence portion. 11 . 11. The air guide cover according to claim 10, wherein the airflow depressing portion is connected to the first slope of the airflow turbulent portion. 12. The air guide cover according to claim 10, characterized in that: the inclination angle of the first inclined surface of the airflow depressing part and the airflow turbulent part is the same.

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