CN211152539U - Composite radiating fin and radiating module - Google Patents

Abstract

The utility model provides a combined type heat radiation fins is applicable to the radiating module. The composite heat dissipation fin comprises a first sub-fin and a second sub-fin. The second sub-fin is pressed on the first sub-fin. The thermal conductivity of the first sub-fin is different from the thermal conductivity of the second sub-fin. The utility model also provides a heat radiation module, including frame construction and a plurality of foretell combined type heat radiation fins. The composite heat dissipation fins are arranged on the frame structure in parallel and at intervals.

Description

Composite radiating fin and radiating module

Technical Field

The present invention relates to a composite heat sink and a heat sink module, and more particularly to a composite heat sink comprising a plurality of sub-fins with different thermal conductivity and a heat sink module having the same.

Background

With the progress of technology, the performance of the processor and the GPU of the display card is improved. However, during operation, heat energy is generated, and the heat energy needs to be removed immediately to prevent the shutdown due to overheating. The prior art radiating fins are made of a single aluminum sheet, and although the aluminum sheet has the advantage of fast heat dissipation, the heat conductivity of the aluminum sheet is low, so that the heat absorption speed of the aluminum sheet is slow.

SUMMERY OF THE UTILITY MODEL

The utility model provides a combined type heat radiation fins has the heat-sinking capability of preferred.

The utility model provides a heat radiation module has foretell combined type heat radiation fins, can have good radiating effect.

The utility model discloses a combined type heat radiation fin, including a first sub-fin and a second sub-fin. The second sub-fin is pressed on the first sub-fin, and the heat conduction coefficient of the first sub-fin is different from that of the second sub-fin.

In an embodiment of the present invention, the first sub-fin of the composite heat dissipation fin includes an aluminum sheet, and the second sub-fin includes a copper sheet.

In an embodiment of the present invention, the thicknesses of the first sub-fin and the second sub-fin in the composite heat dissipation fin are between 0.25 mm and 0.35 mm, respectively.

In an embodiment of the present invention, the composite heat dissipation fin further includes a third sub-fin. The first sub-fin, the second sub-fin and the third sub-fin are sequentially stacked and pressed together, and the heat conduction coefficient of the third sub-fin is different from that of the second sub-fin.

In an embodiment of the present invention, a thermal conductivity of the first sub-fin of the composite heat dissipation fin is the same as a thermal conductivity of the third sub-fin.

In an embodiment of the present invention, the thicknesses of the first sub-fin, the second sub-fin and the third sub-fin in the composite heat dissipation fin are between 0.25 mm and 0.35 mm, respectively.

In an embodiment of the present invention, the thickness of the composite heat dissipation fin is between 0.8 mm and 1.05 mm.

The utility model provides a heat radiation module, including a frame construction and a plurality of combined type heat radiation fins. The composite heat dissipation fins are arranged on the frame structure in parallel and at intervals. Each composite heat dissipation fin comprises a first sub-fin and a second sub-fin. The second sub-fin is pressed on the first sub-fin, and the heat conduction coefficient of the first sub-fin is different from that of the second sub-fin.

In an embodiment of the present invention, a distance between any two adjacent composite heat dissipation fins in the heat dissipation module is between 1.5 mm and 2.5 mm.

In an embodiment of the present invention, the first sub-fin of the heat dissipation module includes an aluminum sheet, and the second sub-fin includes a copper sheet.

In an embodiment of the present invention, the thicknesses of the first sub-fin and the second sub-fin in the heat dissipation module are between 0.25 mm and 0.35 mm, respectively.

In an embodiment of the present invention, each of the composite heat dissipation fins in the heat dissipation module further includes a third sub-fin. The first sub-fin, the second sub-fin and the third sub-fin are sequentially stacked and pressed together. The thermal conductivity of the third sub-fin is different from the thermal conductivity of the second sub-fin.

In an embodiment of the present invention, a thermal conductivity of the first sub-fin in the heat dissipation module is the same as a thermal conductivity of the third sub-fin.

In an embodiment of the present invention, the thicknesses of the first sub-fin, the second sub-fin and the third sub-fin in the heat dissipation module are between 0.25 mm and 0.35 mm, respectively.

In an embodiment of the present invention, the thickness of the composite heat dissipation fin in the heat dissipation module is between 0.8 mm and 1.05 mm.

In an embodiment of the present invention, the heat dissipation module further includes at least one heat pipe. The composite heat dissipation fins are provided with a plurality of holes. At least one heat conduction pipe is arranged through the holes of the combined type heat radiation fins.

In an embodiment of the present invention, the heat dissipation module further includes a fan disposed beside or above the composite heat dissipation fin.

Based on the above, the utility model discloses a combined type radiator fin is formed by the pressfitting of the sub-fin of multiple different heat conduction coefficients, and the designer can select the sub-fin of different materials to obtain corresponding advantage, for example, the sub-fin that the heat conduction coefficient is great is suitable for more fast the transmission of heat to make the temperature of treater, display card GPU can keep under specific temperature when the operation or can reduce the speed that its temperature rose when treater, display card GPU operate. Since the material with a larger thermal conductivity is usually denser or/and more expensive, the other sub-fin can be selected from a material with a smaller density (smaller weight for the same volume) or/and a lower cost, for example, so that the composite heat sink fin has advantages in weight and/or price or other aspects. Furthermore, the utility model discloses a radiating module is owing to chooseing for use foretell combined type heat radiation fins, and has the radiating effect of preferred, and the temperature of treater, display card GPU can keep lower, and the rotational speed of the last fan of radiating module also can follow the reduction, and then noise abatement's production.

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1A is a schematic diagram of a heat dissipation module according to the present invention.

Fig. 1B is a schematic view of hiding the heat pipe and the fan of the heat dissipation module of fig. 1A.

Fig. 1C is an exploded view of fig. 1B.

Fig. 2A is a schematic view of a composite heat dissipation fin of the present invention.

Fig. 2B is an exploded view of fig. 2A.

Fig. 2C is a cross-sectional view taken along line a-a' of fig. 2A.

Fig. 3A is a schematic view of another composite heat sink of the present invention.

Fig. 3B is an exploded view of fig. 3A.

Fig. 3C is a cross-sectional view taken along line a-a' of fig. 3A.

The reference numerals are explained below:

100: heat radiation module

110. 110 a: composite radiating fin

112: first sub-fin

1122: a first hole

1124: the first through hole

114: second sub-fin

1142: second hole

1144: contact ring

1146: fastening piece

1148: a second through hole

116: third sub-fin

1162: third hole

1164: bump

118: hole(s)

120: frame structure

130: heat conduction pipe

140: fan with cooling device

D: distance between two adjacent plates

T, T1, T2, T3, T4: thickness of

Detailed Description

Fig. 1A is a schematic diagram of a heat dissipation module according to the present invention. Fig. 1B is a schematic view of hiding the heat pipe and the fan of the heat dissipation module of fig. 1A. Fig. 1C is an exploded view of fig. 1B. Referring to fig. 1A, fig. 1B and fig. 1C, the heat dissipation module 100 of fig. 1A includes a plurality of composite heat dissipation fins 110, a frame structure 120, at least one heat pipe 130 and a fan 140. The composite heat dissipation fins 110 are arranged in parallel and spaced on the frame structure 120. In the embodiment, the distance D between any two adjacent composite heat dissipation fins 110 is between 1.5 mm and 2.5 mm, but the thickness T of the composite heat dissipation fin 110 and the distance D between two adjacent composite heat dissipation fins 110 are not limited thereto.

Further, the heat dissipation module 100 includes a plurality of heat pipes 130. As can be seen in fig. 1C, each composite heat sink fin 110 has a plurality of holes 118. The heat pipe 130 is disposed through the holes 118 and is welded to the composite heat sink fins 110. The heat pipe 130 extends downward to the outside of the composite heat sink fin 110. The fan 140 is disposed beside or above the composite heat dissipation fins 110, but not limited thereto.

The composite heat sink fins 110 of the present embodiment have better heat dissipation capability, which will be described below. Fig. 2A is a schematic view of a composite heat dissipation fin of the present invention. Fig. 2B is an exploded view of fig. 2A. Fig. 2C is a cross-sectional view taken along line a-a' of fig. 2A. Referring to fig. 2A, fig. 2B and fig. 2C, as can be seen from fig. 2A and fig. 2B, the composite heat sink fin 110 includes a first sub-fin 112, a second sub-fin 114 and a third sub-fin 116, wherein the first sub-fin 112, the second sub-fin 114 and the third sub-fin 116 are sequentially stacked and pressed together.

Referring to fig. 2B, as shown in fig. 2B, the first sub-fin 112 includes a plurality of first holes 1122 and a plurality of first through holes 1124. The second sub-fin 114 includes a plurality of second holes 1142 and a plurality of contact rings 1144, wherein the plurality of contact rings 1144 are disposed outside the second holes 1142. The second sub-fin 114 further includes a plurality of fasteners 1146 and a plurality of second through holes 1148. The third sub-fin 116 includes a plurality of third holes 1162 and a plurality of bumps 1164.

When the first sub-fin 112, the second sub-fin 114 and the third sub-fin 116 are pressed, the first hole 1122, the second hole 1142 and the third hole 1162 of fig. 2B are overlapped to form the hole 118 of fig. 2A, and the contact ring 1144 (fig. 2B) passes through the first hole 1122 (fig. 2B) and is exposed outside the heat sink fin 110. Meanwhile, the bump 1164 passes through the second through hole 1148 and the first through hole 1124, so that the first sub-fin 112, the second sub-fin 114 and the third sub-fin 116 are fixed together. When the second sub-fin 114 is pressed to the first sub-fin 112, the fastener 1146 is fastened to the first sub-fin 112.

Further, the thickness of the first sub-fin 112, the thickness of the second sub-fin 114, and the thickness of the third sub-fin 116 may be between 0.25 mm and 0.35 mm, respectively. In the present embodiment, the thickness of the first sub-fin 112, the thickness of the second sub-fin 114 (labeled as T1), and the thickness of the third sub-fin 116 are, for example, 0.35 mm, but the thickness of the first sub-fin 112, the thickness of the second sub-fin 114, and the thickness of the third sub-fin 116 are not limited thereto. In other embodiments, the thickness of the sub-fins can be reduced to less than 0.25 mm for thinning the heat sink.

In other words, the thickness T2 of the composite cooling fin 110 including the first sub-fin 112, the second sub-fin 114 and the third sub-fin 116 may be between 0.8 mm and 1.05 mm. In the embodiment, the thickness T2 of the composite heat sink fin 110 is 1.05 mm, but the thickness T2 of the composite heat sink fin 110 is not limited thereto.

In the present embodiment, the first sub-fin 112 and the second sub-fin 114 of the composite heat sink fin 110 have different thermal conductivities, and the first sub-fin 112 and the third sub-fin 116 have the same thermal conductivity. For example, the first sub-fin 112 and the third sub-fin 116 may be two aluminum sheets, and the second sub-fin 114 may be a copper sheet. Since the copper sheet has a function of absorbing heat quickly and the aluminum sheet has a function of dissipating heat quickly, the second sub-fin 114 in the middle of the composite heat sink fin 110 is set as the copper sheet, and the contact ring 1144 is disposed on the second sub-fin 114, so as to increase the contact area with the heat pipe 130, and the first sub-fin 112 and the third sub-fin 116, which have large-area contact with the outside air, are set as the aluminum sheets. Thus, the composite heat sink fin 110 in this embodiment can rapidly absorb the heat energy transferred from the heat pipe 130 by the rapid heat absorption function of the middle second sub-fin 114, and then transfer the heat energy to the first sub-fin 112 and the third sub-fin 116. Since the first sub-fin 112 and the third sub-fin 116 have the function of fast heat dissipation, heat can be quickly dissipated to the outside of the composite heat dissipation fin 110, thereby achieving the effect of fast heat dissipation.

Of course, in other embodiments, the thermal conductivity coefficients of the first sub-fin 112, the second sub-fin 114 and the third sub-fin 116 may be different, that is, the first sub-fin 112, the second sub-fin 114 and the third sub-fin 116 may be metal sheets made of different materials, and the composite heat sink fin of the present embodiment is not limited thereto.

As can be seen from the above, in the present embodiment, the composite heat sink fin 110 is composed of a plurality of sub-fins with different thermal conductivity coefficients, and one of the sub-fins has a higher thermal conductivity coefficient. Therefore, compared to the prior art in which the heat sink fins are formed of a single aluminum sheet, the composite heat sink fin 110 of the present embodiment has the functions of fast heat absorption and fast heat dissipation. Therefore, the heat dissipation module 100 using the composite heat dissipation fins 110 of the present embodiment can have a better heat dissipation capability. When the heat dissipation module 100 has a better heat dissipation capability, the temperature of a heat source (not shown) connected to the heat dissipation module 100 is also reduced, so that the rotation speed of the fan 140 can be reduced, thereby reducing the noise generated by the fan 140. In this embodiment, the heat source is, for example, but not limited to, a processor.

On the other hand, since the composite heat sink fin 110 is formed by pressing three sub-fins, the heat dissipation capability (heat dissipation capability) of the single composite heat sink fin 110 is better than that of the conventional heat sink fin compared to the conventional heat sink fin formed by using a single metal sheet. Therefore, in the heat dissipation module 100, the number of the composite heat dissipation fins 110 can be reduced, so that the distance D between any two adjacent heat dissipation fins can be increased.

That is, the distance D between two adjacent composite heat dissipation fins 110 on the heat dissipation module 100 of the present embodiment is greater than the distance between two adjacent heat dissipation fins on the conventional heat dissipation module. Further, in the embodiment, the distance D between any two adjacent composite heat dissipation fins 110 is 2.0 mm, and the average distance between two adjacent fins of a conventional heat dissipation fin made of a single fin would be 1.35 mm. Therefore, the distance D between any two adjacent composite heat dissipation fins 110 of the heat dissipation module 100 of the present embodiment is larger, so that the wind resistance is smaller, and the noise of the fan 140 can be reduced.

Further, in practice, the heat dissipation test is performed on the same heat source by using the conventional heat dissipation module (using the conventional single aluminum fin) and the heat dissipation module 100 of the present embodiment (using the composite heat dissipation fin 110), and compared with the conventional heat dissipation module, the heat dissipation module 100 of the present embodiment can lower the temperature of the heat source by 3 degrees. More specifically, when the heat source (such as a processor) is at the same Core frequency (Core clock), the temperature of the heat source when the heat dissipation module 100 of the present embodiment dissipates heat can be lower than the temperature when the heat dissipation module 100 of the conventional embodiment by 3 degrees, which shows that the heat dissipation module 100 of the present embodiment (using the composite heat dissipation fins 110) has a better heat dissipation effect.

In addition, when the heat dissipation module 100 of the present embodiment is used, the rotation speed of the fan is lower than that of the heat dissipation module 100 of the present embodiment, which uses a single aluminum fin in the prior art, when the core frequency is higher. For example, it is tested that when the core frequency is 1890MHz and the fan speed is 1507rpm, the heat dissipation module 100 of the present embodiment can achieve the noise reduction effect when the core frequency is 1905MHz and the fan speed is 1322rpm, but the fan speed is lower at a higher core frequency compared to the conventional heat dissipation module. In this case, the heat dissipation module 100 of the present embodiment is used, and the temperature of the heat generation source thereof is lowered by 4 degrees more than that of the heat generation source using the conventional heat dissipation module.

Fig. 3A is a schematic view of a composite heat sink fin according to another embodiment of the present invention. Fig. 3B is an exploded view of fig. 3A, and fig. 3C is a cross-sectional view of fig. 3A taken along line a-a'. Referring to fig. 3A, fig. 3B and fig. 3C, the composite heat sink fin 110a of the present embodiment is similar to the composite heat sink fin 110 of fig. 2A, and the difference between the two is: the composite heat sink fin 110a of the present embodiment only includes the first sub-fin 112 and the second sub-fin 114, wherein the first sub-fin 112 and the second sub-fin 114 have different thermal conductivity coefficients. In the present embodiment, the first sub-fin 112 is, for example, an aluminum sheet, and the second sub-fin 114 is, for example, a copper sheet, but not limited thereto. In other embodiments, the first sub-fin 112 and the second sub-fin 114 may be metal sheets with other thermal conductivity coefficients.

Referring to fig. 3B, it can be seen from fig. 3B that the first sub-fin 112 includes a plurality of first holes 1122. The second sub-fin 114 includes a plurality of second holes 1142 and a plurality of contact rings 1144, wherein the contact rings 1144 are disposed outside the second holes 1142. The second sub-fin 114 also includes a plurality of fasteners 1146. When the first sub-fin 112 is pressed against the second sub-fin 114, the first hole 1122 and the second hole 1142 overlap, and the contact ring 1144 passes through the first hole 1122 and is exposed outside the heat sink fin 110 a. When the second sub-fin 114 is pressed to the first sub-fin 112, the fastener 1146 is fastened to the first sub-fin 112.

In the present embodiment, the thickness T3 of the first sub-fin 112 and the thickness T4 of the composite heat sink fin 110a having the first sub-fin 112 and the second sub-fin 114 are between 0.25 mm and 0.35 mm, respectively, so as to be between 0.55 mm and 0.7 mm. In the embodiment, the thickness of the composite heat dissipation fin 110a is 0.7 mm, but the thickness of the composite heat dissipation fin 110a is not limited thereto. In other embodiments, in order to thin and thin the heat dissipation module, the thicknesses of the first sub-fin and the second sub-fin may be reduced to be less than 0.25 mm, so that the thickness of the composite heat dissipation fin 110a is reduced to be less than 0.5 mm.

Similarly, compared with the prior art in which the heat dissipation fin is composed of a single aluminum sheet, the composite heat dissipation fin 110a of the present embodiment is composed of two sub-fins (e.g., an aluminum sheet and a copper sheet), and thus has the functions of fast heat absorption and fast heat dissipation. Therefore, the composite heat dissipation fin 110a of the present embodiment has a better heat dissipation capability.

To sum up, the composite heat dissipation fin of the present invention is formed by pressing a plurality of sub-fins with different thermal conductivity coefficients, so that the designer can select the sub-fins with different materials to obtain corresponding advantages. Since the material with a larger thermal conductivity is usually denser or/and more expensive, the other sub-fin can be selected from a material with a smaller density (smaller weight for the same volume) or/and a lower cost, for example, so that the composite heat sink fin has advantages in weight and/or price or other aspects. Furthermore, the utility model discloses a radiating module is owing to chooseing for use foretell combined type heat radiation fins, and has the radiating effect of preferred, and the temperature of treater can keep lower, and the rotational speed of the last fan of radiating module also can follow the reduction, and then the production of noise abatement. In addition, compare in prior art's heat dissipation module, the utility model discloses a heat dissipation module is under the prerequisite that provides the same or better radiating efficiency, and combined type radiating fin's quantity is reducible, and makes the distance between two adjacent radiating fin multiplicable, and has lower windage, equally also noise abatement.

Although the present invention has been described with reference to the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make modifications and variations without departing from the spirit and scope of the present invention.

Claims (17)

1. A composite heat sink fin, comprising:

a first sub-fin including a plurality of first holes; and

and the second sub-fin comprises a plurality of second holes and a plurality of contact rings, the contact rings are arranged at the outer sides of the second holes, the second sub-fin is pressed on the first sub-fin, the plurality of first holes are overlapped with the plurality of second holes, the contact rings penetrate through the first holes and are exposed out of the heat dissipation fin, and the heat conduction coefficient of the first sub-fin is different from that of the second sub-fin.

2. The composite cooling fin of claim 1, wherein the first sub-fin comprises an aluminum sheet and the second sub-fin comprises a copper sheet.

3. The composite heat sink fin of claim 1, wherein the first sub-fin and the second sub-fin have a thickness of 0.25 mm to 0.35 mm, respectively.

4. The composite cooling fin of claim 1, further comprising a third sub-fin, wherein the third sub-fin comprises a plurality of third holes, the first sub-fin, the second sub-fin and the third sub-fin are stacked and pressed together in sequence, the plurality of first holes, the plurality of second holes and the plurality of third holes overlap, and the thermal conductivity of the third sub-fin is different from the thermal conductivity of the second sub-fin.

5. The composite cooling fin of claim 4, wherein the thermal conductivity of the first sub-fin is the same as the thermal conductivity of the third sub-fin.

6. The composite heat sink fin of claim 4, wherein the first sub-fin, the second sub-fin and the third sub-fin have a thickness of 0.25 mm to 0.35 mm, respectively.

7. The composite cooling fin of claim 4, wherein the composite cooling fin has a thickness of 0.8 mm to 1.05 mm.

8. A heat dissipation module, comprising:

a frame structure; and

a plurality of composite heat fins arranged in parallel and at intervals on the frame structure, each of the composite heat fins comprising:

a first sub-fin including a plurality of first holes; and

and the second sub-fin comprises a plurality of second holes and a plurality of contact rings, the contact rings are arranged at the outer sides of the second holes, the second sub-fin is pressed on the first sub-fin, the plurality of first holes are overlapped with the plurality of second holes, the contact rings penetrate through the first holes and are exposed out of the heat dissipation fin, and the heat conduction coefficient of the first sub-fin is different from that of the second sub-fin.

9. The heat dissipation module of claim 8, wherein a distance between any two adjacent composite heat dissipation fins is between 1.5 mm and 2.5 mm.

10. The thermal module of claim 8, wherein the first sub-fin comprises an aluminum sheet and the second sub-fin comprises a copper sheet.

11. The heat dissipation module of claim 8, wherein the first sub-fin and the second sub-fin have a thickness of 0.25 mm to 0.35 mm, respectively.

12. The heat dissipating module of claim 8, wherein each of the composite heat dissipating fins further comprises a third sub-fin, the third sub-fin comprises a plurality of third holes, the first sub-fin, the second sub-fin and the third sub-fin are sequentially stacked and pressed together, the plurality of first holes, the plurality of second holes and the plurality of third holes overlap, and the thermal conductivity of the third sub-fin is different from the thermal conductivity of the second sub-fin.

13. The thermal module of claim 12, wherein the thermal conductivity of the first sub-fin is the same as the thermal conductivity of the third sub-fin.

14. The heat dissipation module of claim 12, wherein the first sub-fin, the second sub-fin, and the third sub-fin have a thickness of 0.25 mm to 0.35 mm, respectively.

15. The heat dissipating module of claim 12, wherein the composite heat dissipating fin has a thickness of 0.8 mm to 1.05 mm.

16. The heat dissipating module of claim 8, further comprising at least one heat pipe disposed through the first and second plurality of holes.

17. The heat dissipating module of claim 8, further comprising a fan disposed beside or above the plurality of composite heat dissipating fins.

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