CN2658944Y - heat sink - Google Patents

Abstract

The utility model discloses a heat dissipation device, which comprises a first heat dissipation body, a second heat dissipation body and at least two heat pipes; wherein, the second heat dissipation body is located above the first heat dissipation body, and each heat pipe has a heat receiving part and a heat dissipation part. The heat receiving part and the heat radiating part of each heat pipe are connected to the first heat radiating body and the second heat radiating body respectively, and the distance between the heat receiving parts of any two adjacent heat pipes is smaller than the distance between the heat radiating parts of the two adjacent heat pipes . In this way, since the distance between the heat receiving parts of the heat pipes is relatively small, they can be concentrated on the position corresponding to the first radiator and the electronic heating component. Furthermore, because the distance between the radiating parts of each heat pipe is relatively large, the heat can be dispersed to various parts of the second radiating body, thereby achieving the effect of uniformly diffusing heat.

Description

heat sink

technical field

The utility model relates to a heat dissipation device, in particular to a heat dissipation device which arranges a plurality of heat pipes on the heat dissipation device to evenly distribute heat dissipation points.

Background technique

Since the heat pipe has the characteristics of strong thermal conductivity, light weight, simple structure and wide application, it can transfer a large amount of heat without consuming electric energy, so it is very suitable for use in the heat dissipation of electronic products. Generally, the heat pipe is applied to the heat dissipation device of the electronic product, so that one end of the heat pipe is connected to the electronic heating component through thermal conductivity, and the other end is provided with a plurality of heat dissipation fins. Relying on the strong heat conduction ability of the heat pipe, the heat generated by the electronic heating component is transferred to the heat dissipation fins through the heat pipe to dissipate heat and cool down. At the same time, the heat accumulated between the heat dissipation fins is quickly taken away by the heat dissipation fan to achieve a good heat dissipation effect. In addition, in order to transfer the heat generated by the electronic heating components to the cooling fins more quickly, multiple heat pipes are usually used. However, since most of the heat pipes installed on the cooling device in the past extend vertically from bottom to top, when a plurality of heat pipes are arranged side by side, the heat pipes are parallel to each other. Therefore, if the distance between the heat pipes is too large, the bottom of the heat pipe will not be in contact with the center of the heat source; if the distance between the heat pipes is too small, the heat will be too concentrated at the top, which is not conducive to heat dissipation.

The designer of the present utility model aims at above-mentioned defect, in conjunction with the experience of being engaged in this industry for many years, studies with great concentration, in the spirit of keeping improving, has designed the utility model.

Contents of the utility model

The main purpose of this utility model is to provide a heat dissipation device. When multiple heat pipes are used on the heat dissipation device, these heat pipes can be arranged effectively so that each heat pipe can be in contact with the center of the heat source, and at the same time, the heat dissipation points can be evenly distributed, thereby effectively utilizing The heat dissipation area of the heat dissipation device achieves the best heat dissipation effect.

In order to achieve the above object, the utility model provides a heat dissipation device, which includes a first heat dissipation body, a second heat dissipation body and at least two heat pipes. Wherein, the second heat dissipation body is located above the first heat dissipation body, and each heat pipe has a heat receiving part and a heat dissipation part. The heat-receiving part and the heat-dissipating part of each heat pipe are connected to the first and second heat-dissipating bodies respectively, and the distance between the heat-receiving parts of adjacent heat pipes is smaller than the distance between the heat-dissipating parts of the adjacent heat pipes. In this way, because the distance between the heat receiving parts of each heat pipe is small, it can be concentrated on the position corresponding to the first radiator and the electronic heating component, and the distance between the heat radiation parts of each heat pipe is relatively large, so the heat can be dispersed. To each part of the second cooling body, the effect of uniformly diffusing heat is achieved, so as to achieve the above purpose.

The heat dissipation device of the utility model can make full use of the heat dissipation area of its components, and has the best heat dissipation effect.

Brief description of the drawings

Fig. 1 is the three-dimensional exploded view of the heat dissipation device of an embodiment of the present invention;

Fig. 2 is a three-dimensional combined view (another viewing angle) of the heat dissipation device of an embodiment of the present invention;

Fig. 3 is a sectional view of section 3-3 of Fig. 2;

Fig. 4 is a sectional view of section 4-4 of Fig. 2;

Fig. 5 is an exploded three-dimensional view (the same viewing angle as Fig. 2 ) of an additional wind power device according to an embodiment of the present invention;

Fig. 6 is a three-dimensional combined view (same viewing angle as Fig. 2 ) of an additional wind power device according to an embodiment of the present invention;

Fig. 7 is a side sectional view of an additional wind power device according to an embodiment of the present invention.

The symbol list of the components in the accompanying drawings is as follows:

first radiator 1

base 10 groove 100

Channel 101 Groove 102

Heat conductor 11

Second radiator 2

Base 20 Groove 200

Heat pipe 3, 3'

Heating part 30, 30' Radiating part 31, 31'

Heat transfer part 32, 32' bending part 33, 33'

Heat sink fin set 4

Fin 40, 40′ slot 400′

Wind device 5

Fan blade 50 Frame 51

Windshield 52 Group piece 520, 521

Detailed ways

The features and technical contents of the present utility model will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference and description only, and are not intended to limit the utility model.

FIG. 1 , FIG. 2 , and FIG. 3 are a three-dimensional exploded view, a three-dimensional assembled view, and a 3-3 cross-sectional view of FIG. 2 , respectively, of a heat dissipation device according to an embodiment of the present invention. As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model provides a heat dissipation device, which includes a first heat dissipation body 1, a second heat dissipation body 2 and at least two heat pipes 3, 3'.

The first radiator 1 is made of a material with good thermal conductivity, such as aluminum, and can be flat. The first radiator 1 has a base 10, and a groove 100 is arranged on the bottom surface of the base 10, and a thermal conductor 11 with a thermal conductivity constant greater than that of the first radiator 1 is embedded in the groove 100, and the thermal conductor 11 may be a sheet-shaped body made of copper, which is attached to electronic heating components such as a central processing unit (CPU) (figure omitted). In addition, at least one groove 101 is provided on the top surface of the base 10 of the first radiator 1, the groove 101 is just above the heat conductor 11 and communicates with the heat conductor 11, so that the above-mentioned heat pipes 3, 3' are placed on The part inside the channel 101 can be in direct contact with the heat conductor 11 .

The second heat sink 2 is located above the top surface of the first heat sink 1 , and may also be a flat plate made of materials with good thermal conductivity such as aluminum and copper. The second heat sink 2 also has a base 20, and the bottom surface of the base 20 is provided with at least two grooves 200 through which a part of the above-mentioned heat pipes 3, 3' can pass. A cooling fin set 4 is disposed between the base 10 of the first cooling body 1 and the base 20 of the second cooling body 2 . The heat dissipation fin group 4 is formed by a plurality of fins 40 arranged continuously at intervals, and channels are left between each fin. Each fin 40 stands vertically between the base 10 of the first radiator 1 and the base 20 of the second radiator 2 . Each fin 40 of the cooling fin set 4 can also be made of copper.

The heat pipes 3, 3' are both in the shape of a "ㄈ", and respectively have a heat receiving part 30, 30' and a heat dissipation part 31, 31'. Between the heat receiving parts 30, 30' and the heat dissipation parts 31, 31' of the heat pipes 3, 3' are heat transfer parts 32, 32'. A bent portion 33, 33' is formed between the heat transfer portion 32, 32', the heat receiving portion 30, 30' and the heat dissipation portion 31, 31' respectively, and these constitute the heat pipe 3, 3'. The heat receiving parts 30 , 30 ′ and the heat dissipation parts 31 , 31 ′ of the heat pipes 3 , 3 ′ are thermally connected to the first radiator 1 and the second radiator 2 respectively. In one embodiment of the present invention, the heat dissipation parts 31 , 31 ′ of the two heat pipes 3 , 3 ′ are respectively disposed in the groove 200 of the second heat dissipation body 2 . The heat receiving parts 30 , 30 ′ are jointly disposed in the channel 101 of the first radiator 1 and are in contact with the surface of the heat conductor 11 (as shown in FIG. 3 ). In this way, the heat pipes 3, 3' can quickly transfer the heat absorbed by the heat conductor 11 to the heat dissipation parts 31, 31' through the heat transfer parts 32, 32'.

In the present utility model, among these heat pipes 3, 3', at least one heat pipe 3' is arranged obliquely to the outside of the channel 101 relative to the vertically erected heat pipe 3 (as shown in Figure 3), or these heat pipes 3 , 3' are radially arranged from the first radiator 1 to the second radiator 2 (figure omitted). Therefore, the distance S1 between the heat receiving parts 30, 30' of any two adjacent heat pipes 3, 3' is smaller than the distance S2 between the heat dissipation parts 31, 31' of two adjacent heat pipes 3, 3'. In this way, because the heat receiving parts 30, 30' of each heat pipe 3, 3' are relatively close to each other, they can be concentratedly arranged on the position corresponding to the first radiator 1 and the electronic heating assembly, and the heat radiation parts of each heat pipe 3, 3' The distance between 31 and 31' is relatively long, so that the heat is distributed to various parts of the second heat sink 2, so that the heat dissipation points are evenly distributed, and the heat dissipation area of the heat dissipation device is effectively used to exert its best heat dissipation capacity.

As shown in Figures 1 and 4, the utility model can also be used on fins 40 adjacent to the cooling fin group 4 and the heat pipe 3, 3' curved portion 33, 33' (that is, the curved portion of the heat pipe 3, 3'). On the top, slots 400' opening toward the bent portions 33, 33' of the heat pipes 3, 3' are provided to form fins 40'. The bent portions 33, 33' of the heat pipes 3, 3' can be partially disposed in the slots 400'. In this way, the heat transfer portion 32, 32' of each heat pipe 3, 3' can be closer to the outermost fin 40' of the heat dissipation fin group 4 (as shown in Figure 4), thereby reducing the overall volume of the heat dissipation device .

In addition, as shown in FIG. 5 , FIG. 6 and FIG. 7 , the utility model further includes a wind power device 5 . The wind power device 5 may be a heat dissipation fan, installed on the same side of the first heat dissipation body 1 and the second heat dissipation body 2 , and opposite to the channels between the fins of the heat dissipation fin group 4 . The airflow generated by the wind power device 5 can take away the heat accumulated in each channel. At the same time, a groove 102 concaved inward and matched with the bottom of the wind power device can also be provided on the side of the first cooling body 1 where the wind power device 5 is provided. The bottom of the wind power device 5 is placed in the groove 102, so that the fan blade 50 of the wind power device 5 corresponds completely to the side of the cooling fin group 4 (as shown in Figure 7 ), avoiding the fan due to the outer frame 51 of the wind power device 5 . The blades 50 are elevated so that the airflow generated by the wind power device 5 cannot flow to the bottom of the cooling fin group 4 and cause heat accumulation.

In addition, as shown in FIG. 5 , FIG. 6 , and FIG. 7 , a windshield 52 may be further provided outside the first radiator 1 and the second radiator 2 . The windshield 52 has two groups of sheets, which are respectively located on both sides of the first radiator 1 and the second radiator 2. Each group of sheets includes two sheet-shaped bodies 520, 521, one in front and one in the back, and the first radiator The body 1 and the second heat sink 2 are connected to concentrate the airflow generated by the wind power device 5 to dissipate heat for each heat pipe 3, 3' and heat dissipation fin group 4.

The cooling device of the present utility model has at least the following advantages:

1. Since the heat receiving parts 30, 30' of each heat pipe 3, 3' are concentrated on the center of the heat source, the heat generated by the main heat source can be quickly transferred from the heat transfer part 32, 32' to the heat dissipation part 31, 31' superior.

2. Since the heat dissipation parts 21, 21' of each heat pipe 3, 3' are relatively scattered on the second heat dissipation body 2, the heat dissipation points are evenly distributed, and the heat dissipation effect of the heat dissipation device can be fully utilized to promote heat dissipation and reduce the temperature Effect.

In summary, the utility model is a rare design, can achieve the expected purpose of use, overcomes the shortcomings of the known technology, has novelty and creativity, fully meets the requirements of utility model patent applications, and is now in accordance with the Patent Law Submit your application and please approve it.

The above descriptions are only preferred embodiments of the present utility model, and are not limitations of the present utility model. All equivalent changes made according to the specification and drawings of the utility model, directly or indirectly used in other related technical fields, are covered by the patent claims of the utility model.

Claims (10)

1. A cooling device, comprising: a first radiator; a second heat sink located above the first heat sink; and At least two heat pipes have a heat receiving part and a heat dissipation part, the heat receiving part is thermally connected to the first heat dissipation body, and the heat dissipation part is thermally connected to the second heat dissipation body, It is characterized in that the distance between the heat receiving parts of any two adjacent heat pipes is smaller than the distance between the heat dissipation parts of the two adjacent heat pipes. 2. The heat dissipation device according to claim 1, wherein the first heat dissipation body has a base, the bottom surface of the base is provided with a groove, and a thermal conductivity constant greater than that of the groove is embedded in the groove. The thermal conductor of the first radiator. 3. The heat dissipation device according to claim 2, wherein the top surface of the base of the first heat dissipation body is provided with at least one channel, and the channel is located above and communicated with the heat conductor, so that The heat receiving part of the heat pipe is arranged in the channel and is in direct contact with the heat conductor. 4. The heat dissipation device according to any one of claims 1 to 3, wherein the second heat dissipation body has a base, and the bottom surface of the base of the second heat dissipation body is provided with at least two grooves , the groove is used for setting the heat dissipation part of the heat pipe. 5. The heat dissipation device according to any one of claims 1 to 3, wherein a cooling fin group is arranged between the first cooling body and the second cooling body, and the cooling fin group is composed of a plurality of The fins are arranged continuously at intervals, and channels are arranged between the fins. 6 . The heat dissipation device according to claim 5 , wherein the fins of the heat dissipation fin group close to the bent portion of the heat pipe are provided with slots opening toward the bent portion of the heat pipe. 7 . 7. The heat dissipation device according to any one of claims 1 to 3, characterized in that, among the at least two heat pipes, at least one of the heat pipes is arranged obliquely relative to the vertically erected heat pipe. 8. The heat dissipation device according to any one of claims 1 to 3, wherein the at least two heat pipes are radially arranged from the first heat dissipation body to the second heat dissipation body. 9. The heat dissipation device according to any one of claims 1 to 3, characterized in that the heat dissipation device further comprises a wind device arranged on the same side of the first and second heat dissipation bodies. 10. The heat dissipation device according to claim 9, wherein a wind shield is provided on the outside of the first heat dissipation body and the second heat dissipation body, and the wind shield has two groups of sheets, which are respectively located on the first heat dissipation body. The two sides of the body and the second heat dissipation body are connected to the first heat dissipation body and the second heat dissipation body.

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