CN213543313U

CN213543313U - Heat sink device

Info

Publication number: CN213543313U
Application number: CN202022371070.1U
Authority: CN
Inventors: 温远龙; 樊美平; 郑善尹
Original assignee: Cooler Master Co Ltd
Current assignee: Cooler Master Co Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-06-25
Anticipated expiration: 2030-10-22

Abstract

A heat dissipation device is used for filling a phase change fluid. The heat sink includes a base and a plurality of heat dissipation fins. The base part is provided with at least one internal flow passage for filling the phase change fluid. The heat dissipation fins respectively comprise a plate body and at least one tube body. The plate bodies are inserted into one side of the base. The plate bodies are respectively provided with an extending flow passage. The opposite ends of the tube bodies are respectively inserted into the plate bodies and the base part, and the extending flow passages of the plate bodies are respectively communicated with at least one internal flow passage through the tube bodies.

Description

Heat sink device

Technical Field

The present invention relates to a heat dissipation device, and more particularly to a liquid cooling heat dissipation device.

Background

Along with the increasing operating frequency and speed of electronic components, the heat generated by the electronic components per unit volume is increased. However, the conventional simple aluminum extruded and die-cast heat dissipation fins have very limited heat dissipation area due to the limitation of machining, and the area for exchanging heat with the surrounding air is not large, so that even if a fan is used, the heat dissipation fins cannot dissipate heat sufficiently in time, and the heat dissipation fins no longer meet the heat dissipation requirements of the current electronic manufacturers.

SUMMERY OF THE UTILITY MODEL

The utility model provides a heat dissipation device, thereby promote heat dissipation device's radiating efficiency.

The heat dissipating device disclosed in an embodiment of the present invention is used for filling a phase change fluid. The heat sink includes a base and a plurality of heat dissipation fins. The base part is provided with at least one internal flow passage for filling the phase change fluid. The heat dissipation fins respectively comprise a plate body and at least one tube body. The plate bodies are inserted into one side of the base. The plate bodies are respectively provided with an extending flow passage. The opposite ends of the tube bodies are respectively inserted into the plate bodies and the base part, and the extending flow passages of the plate bodies are respectively communicated with at least one internal flow passage through the tube bodies.

In an embodiment of the present invention, the at least one internal flow channel is a closed flow channel.

In an embodiment of the present invention, the base portion includes a first plate portion and a second plate portion, the plate bodies of the heat dissipation fins are inserted into the first plate portion, and the first plate portion and the second plate portion together surround the at least one internal channel.

In an embodiment of the present invention, the heat sink further includes at least one first capillary structure, and the first capillary structure is distributed on the second plate portion to form a wall surface of the at least one internal flow channel close to the heat source.

In an embodiment of the present invention, the heat sink further includes at least one first capillary structure, the first capillary structure is distributed on the wall surface of the first plate portion forming the at least one internal flow channel and the wall surface of the second plate portion forming the at least one internal flow channel close to the heat source.

In an embodiment of the present invention, the liquid container further includes a plurality of second capillary structures, and the second capillary structures are respectively distributed on the wall surfaces of the plate bodies forming the extending flow channels.

In an embodiment of the present invention, the second capillary structures are separated from the first capillary structure.

In an embodiment of the present invention, the second capillary structures are connected to the first capillary structure.

In an embodiment of the present invention, the at least one first capillary structure is a polymer microstructure, a micro groove, a metal mesh, a powder sintered body, a ceramic sintered body, or a composite of at least two of the polymer microstructure, the micro groove, the metal mesh, the powder sintered body, and the ceramic sintered body.

In an embodiment of the present invention, the flow path of the at least one internal flow channel is matched with the flow path of the oscillating heat pipe to form a curved loop.

In an embodiment of the present invention, the number of the at least one internal flow channel is plural, and the internal flow channels cross each other.

In an embodiment of the present invention, the number of the at least one internal flow channel is plural, and the internal flow channels are parallel to each other.

In an embodiment of the present invention, the plate body of each of the heat dissipation fins is a blown plate.

In an embodiment of the present invention, the plate body of each of the heat dissipation fins is formed by combining two plate members.

According to the heat dissipation device of the embodiment, the internal flow channels are communicated with the extension flow channels, so that the phase change fluid filled in the internal flow channels is vaporized and flows to the extension flow channels after being heated, and the phase change fluid in the extension flow channels flows back to the internal flow channels after being liquefied to form an internal cooling circulation. Therefore, the heat dissipation device not only forms two-dimensional conduction through the base part, but also forms third-dimensional conduction through the temperature equalizing plate, so that the heat dissipation device achieves a three-dimensional temperature equalizing effect, and the heat dissipation efficiency of the heat dissipation device is further improved.

Moreover, the plate body in the form of the blowing plate is assembled on the base part through the pipe body, so that the manufacturing difficulty of the heat dissipation device can be reduced.

The above description of the present invention and the following description of the embodiments are provided to illustrate and explain the principles of the present invention and to provide further explanation of the claims of the present invention.

Drawings

Fig. 1 is a schematic perspective view of a heat dissipation device according to a first embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic cross-sectional view of FIG. 1;

fig. 5 is a schematic cross-sectional view of a heat dissipation device according to a second embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of a heat dissipation device according to a third embodiment of the present invention;

fig. 7 is a schematic plan view of a heat dissipation device according to a fourth embodiment of the present invention;

fig. 8 is a schematic plan view of a heat dissipation device according to a fifth embodiment of the present invention.

[ notation ] to show

10. 10a, 10b, 10c, 10d

A base part

A first plate portion

A first groove

A socket

120. 120c, 120d

A second groove

200

Plate body

Tube body

300

400. 400b

S

Extension flow passage

Detailed Description

Please refer to fig. 1 to 4. Fig. 1 is a schematic perspective view of a heat dissipation device according to a first embodiment of the present invention. Fig. 2 is an exploded view of fig. 1. Fig. 3 is an exploded view of fig. 1. Fig. 4 is a schematic cross-sectional view of fig. 1.

The heat dissipation device 10 of the present embodiment is used for filling a phase change fluid (not shown), and the heat dissipation device 10 includes a base 100 and a plurality of heat dissipation fins 200.

The base 100 has, for example, a plurality of internal flow passages S. These internal flow passages S are parallel to each other and communicate with each other. The internal channel S is filled with a phase change fluid (not shown). In the present embodiment, the base 100 includes a first plate 110 and a second plate 120. The first plate portion 110 has a plurality of first grooves 111 at one side thereof and a plurality of insertion grooves 112 at an opposite side thereof. The second plate portion 120 has a plurality of second grooves 121. The first plate portion 110 overlaps the second plate portion 120, and the first groove 111 and the second groove 121 together form a plurality of internal flow channels S. The second plate portion 120 is for thermally contacting a heat source (not shown). The heat source is, for example, a CPU, an image processor, etc. The phase-change fluid may be water, alcohol, or refrigerant, and the selection of the phase-change fluid may be determined according to the material of the heat dissipation device 10 itself or the working temperature of the heat source (not shown). For example, if the heat source is operated at 80 to 100 degrees, the vaporization temperature of the phase change fluid is between 80 to 100 degrees.

The base 100 of the present embodiment is assembled through two plate portions, but not limited thereto. In other embodiments, the base portion may be integrally formed by blow-molding or lost foam casting. In addition, the number of the internal flow passages S in the present embodiment is plural, but not limited thereto. In other embodiments, the number of internal flow passages may be only a single one.

Each of the vapor chamber 200 includes a plate 210 and at least one tube 220. The plate body 210 of each cooling fin 200 is, for example, an inflation plate, that is, formed by, for example, inflation. The plate bodies 210 of the heat dissipation fins 200 are inserted into the slots 112 of the first plate 110, and each of the plate bodies 210 has an extended flow channel C. Opposite ends of the tubes 220 are respectively inserted into the plates 210 and the base 100, and the extending channels C of the plates 210 are respectively communicated with the internal channel S through the tubes 220.

In the present embodiment, after the plate bodies 210 of the heat dissipation fins 200 are inserted into the slots 112 of the first plate portion 110, the plate bodies 210 and the first plate portion 110 may be welded, for example, by a welding process, so as to improve the assembly quality of the heat dissipation device 10.

In the present embodiment, each plate 210 is connected to the internal flow channel S through two tubes 220, but not limited thereto. In other embodiments, each plate may be connected to the inner channel S through a single tube, or through more than three tubes.

The plate body 210 of the present embodiment is integrally formed by blowing, but not limited thereto. In other embodiments, the plate body may be formed by combining two plate members.

In this embodiment, the heat dissipation device 10 may further include a first capillary structure 300. The first capillary structures 300 are distributed on the wall surface of the second plate portion 120 forming at least one internal flow channel S. However, this design is not intended to limit the present invention. In other embodiments, the number of the first capillary structures may be multiple, and the wall surface of the first plate portion 110 forming the at least one internal flow channel S and the wall surface of the second plate portion 120 forming the at least one internal flow channel S close to the heat source are distributed.

The first capillary structure 300 is, for example, a polymer microstructure, a micro groove, a metal mesh, a sintered powder body, a sintered ceramic body, or a composite of at least two of a polymer microstructure, a micro groove, a metal mesh, a sintered powder body, and a sintered ceramic body, and the first capillary structure 300 is distributed on the second plate portion 120 to form a wall surface of the internal flow paths S close to the heat source.

The internal flow passages S and the extended flow passages C of the present embodiment are closed flow passages without being communicated with the components other than the heat sink 10. That is, the phase-change fluid filled in the internal flow channels S is heated and vaporized, and flows to the extension flow channel C, and the phase-change fluid in the extension flow channel C is liquefied and then flows back to the internal flow channel S, so as to form an internal cooling cycle. As can be seen from the foregoing cooling cycle, the heat dissipation device 10 not only forms two-dimensional conduction through the base 100, but also forms third-dimensional conduction through the temperature equalization plate 200, so that the heat dissipation device 10 achieves a three-dimensional temperature equalization effect, thereby enhancing the heat dissipation efficiency of the heat dissipation device 10.

In addition, the internal flow channel S is formed in the base 100, and the capillary structure 300 is formed on the wall surface of the base 100 forming the internal flow channel S, so that the heat diffusion speed of the heat dissipation device 10 is increased. For example, if the heat source is in thermal contact with the center of the heat sink 10, and the internal channel S and the capillary structure 300 extend from the center of the heat sink 10 to the edge of the heat sink 10, the heat generated by the heat source can be rapidly transferred to the edge of the heat sink 10 through the internal channel S and the capillary structure 300. In this way, the heat generated by the heat source can be uniformly dissipated over the entire area of the heat dissipation device 10.

In addition, the plate 210 in the form of an inflation plate is assembled to the base 100 through the tube 220, which can reduce the difficulty in manufacturing the heat dissipation device 10.

Please refer to fig. 5. Fig. 5 is a schematic cross-sectional view of a heat dissipation device according to a second embodiment of the present invention.

In this embodiment, the heat dissipation device 10a may further include a plurality of second capillary structures 400, the second capillary structures 400 are respectively distributed on the wall surfaces of the plate bodies 210 forming the extending flow channels C and the inner wall surfaces of the tube bodies 220, and the second capillary structures 400 are separated from the first capillary structures 300.

The second capillary structure 400 is, for example, a polymer microstructure, a micro groove, a metal mesh, a sintered powder body, a sintered ceramic body, or a composite of at least two of a polymer microstructure, a micro groove, a metal mesh, a sintered powder body, and a sintered ceramic body, and the second capillary structure 400 is distributed on the wall surface of the plate body 210 forming the extending flow channels C.

Please refer to fig. 6. Fig. 6 is a schematic cross-sectional view of a heat dissipation device according to a third embodiment of the present invention.

In this embodiment, the heat dissipation device 10b may further include a plurality of second capillary structures 400b, the second capillary structures 400 are respectively distributed on the wall surfaces of the plate bodies 210 forming the extending flow channels C and the inner wall surfaces of the tube bodies 220, and the second capillary structures 400 are connected to the first capillary structures 300.

The second capillary structure 400b is, for example, a polymer microstructure, a micro groove, a metal mesh, a sintered powder body, a sintered ceramic body, or a composite of at least two of the polymer microstructure, the micro groove, the metal mesh, the sintered powder body, and the sintered ceramic body, and the second capillary structure 400b is distributed on the wall surface of the plate body 210 forming the extending flow channels C.

Please refer to fig. 7. Fig. 7 is a schematic plan view of a heat dissipation device according to a fourth embodiment of the present invention. In the heat dissipating device 10c of the present embodiment, the number of the at least one internal flow channel S is plural when viewed from the bottom of the second plate portion 120c, and the internal flow channels S intersect with each other.

Please refer to fig. 8. Fig. 8 is a schematic plan view of a heat dissipation device according to a fifth embodiment of the present invention. In the heat dissipating device 10d of the present embodiment, when viewed from the bottom of the second plate portion 120d, the flow path of at least one internal flow channel S matches the flow path of the oscillating heat pipe to form a curved loop.

In addition, the heat diffusion speed of the heat dissipation device is improved through the internal flow channel formed on the base part and the capillary structure formed on the wall surface of the internal flow channel formed on the base part. For example, if the heat source is in thermal contact with the center of the heat sink, and the internal flow channel and the capillary structure extend from the center of the heat sink to the edge of the heat sink, the heat generated by the heat source can be rapidly transferred to the edge of the heat sink through the internal flow channel and the capillary structure. Therefore, the heat generated by the heat source can be uniformly exhausted from the whole area of the heat dissipation device.

Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited to the above embodiments, and other changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. A heat sink for filling a phase change fluid, the heat sink comprising:

a base having at least one internal channel for filling the phase change fluid; and

the heat dissipation device comprises a plurality of heat dissipation fins, wherein each heat dissipation fin comprises a plate body and at least one pipe body, the plate bodies are inserted into one side of the base part, each plate body is provided with an extension flow channel, two opposite ends of each pipe body are respectively inserted into the plate bodies and the base part, and the extension flow channels of the plate bodies are respectively communicated with the at least one internal flow channel through the pipe bodies.

2. The heat dissipating device of claim 1, wherein the at least one internal flow channel is a closed flow channel.

3. The heat dissipating device of claim 2, wherein the base portion comprises a first plate portion and a second plate portion, the plates of the heat dissipating fins are inserted into the first plate portion, and the first plate portion and the second plate portion together surround the at least one internal flow channel.

4. The heat dissipating device of claim 3, further comprising at least one first capillary structure disposed on the second plate portion to form a wall of the at least one internal flow channel near the heat source.

5. The heat dissipating device of claim 3, further comprising at least a first capillary structure, wherein the first capillary structure distributes the wall surface of the first plate portion forming the at least one internal flow channel and the wall surface of the second plate portion forming the at least one internal flow channel close to the heat source.

6. The heat dissipating device of claim 5, further comprising a plurality of second capillary structures respectively distributed on the plate bodies to form the walls of the extended flow channels.

7. The heat dissipating device of claim 6, wherein the second capillary structures are separated from the first capillary structures.

8. The heat dissipating device of claim 6, wherein the second capillary structures are connected to the first capillary structure.

9. The heat dissipating device of any one of claims 4 to 8, wherein the at least one first capillary structure is a polymer microstructure, a micro-groove, a metal mesh, a sintered powder body, a sintered ceramic body, or a composite of at least two of a polymer microstructure, a micro-groove, a metal mesh, a sintered powder body, and a sintered ceramic body.

10. The heat dissipating device of claim 1, wherein the flow path of the at least one internal flow channel matches the flow path of the oscillating heat pipe to form a meandering loop.

11. The heat dissipating device of claim 1, wherein the at least one internal flow channel is plural in number, and the internal flow channels cross each other.

12. The heat dissipating device of claim 1, wherein the at least one internal flow channel is multiple in number and parallel to each other.

13. The heat dissipating device of claim 1, wherein the plate body of each of the heat dissipating fins is an inflatable plate.

14. The heat dissipating device of claim 1, wherein the plate of each fin is formed by two plates.