TW201947181A - Heat sink and heat dissipation device using same - Google Patents

Abstract

A heat sink includes a heat pipe, a first fin and a second fin. The heat pipe includes a tube, a capillary structure and a working fluid. The heat pipe has a heating section, a first radiating section and a second radiating section. The heating section has a heat chamber. The first radiating section and the second radiating section has a radiating chamber. A section area of the heat chamber is larger than a section area of each radiating chamber. The first fin is connecting to the first radiating section. The second fin is connecting to the second radiating section.

Description

Radiator and radiator using the same

The present invention relates to a radiator technology, and more particularly to a radiator and a heat sink using the radiator.

As the computing speed of electronic components continues to increase, the heat generated by them is also getting higher and higher. In order to effectively solve this problem of high heat generation, the industry has used heat pipes with good thermal conductivity for a wide range of applications. Among them, the heat sink combined with a heat pipe and a heat dissipation fin group has the advantages of light weight, good conduction, and good heat dissipation effect, and thus becomes an indispensable component for heat dissipation of electronic components.

However, the existing radiators mainly include a heat pipe and a heat dissipation fin group, in which the heating section and the heat releasing section of the heat pipe are mostly configured with equal pipe diameters. When the working fluid flows from the heated end to the heat release end after vaporization, only It can be conducted by means of the pressure difference caused by the temperature change of the working fluid, so that its thermal conductivity is greatly restricted. Other heat pipes are only configured for a single heated section and a single heat-release section, which will make the heat pipe's thermal conductivity poor.

In view of this, the present inventors have devoted themselves to the above-mentioned prior art, researched intensively and cooperated with the application of science to try to solve the above-mentioned problems, which has become the goal of the inventors' improvement.

An object of the present invention is to provide a heat sink and a heat dissipation device using the heat sink, which pass through different cross-sectional areas of a heat receiving cavity and each heat releasing cavity, so that the vaporized working fluid can accelerate to each heat releasing capacity. The cavity performs heat exchange, thereby improving the conduction and heat dissipation efficiency of the radiator.

In order to achieve the above object, the present invention provides a heat sink including a heat pipe, a first fin group and a second fin group. The heat pipe includes a tube body, a capillary structure disposed in the tube body, and a work. Fluid, the heat pipe has a heat receiving section and a first heat releasing section and a second heat releasing section respectively extending from two ends of the heat receiving section. The heat receiving section has a heat receiving cavity inside, the first heat releasing section and the heat releasing section. Each of the second heat release sections has a heat release capacity cavity, and the cross-sectional area of the heat receiving capacity cavity is larger than the cross sectional area of each heat release capacity cavity; the first fin group is sleeved on the first heat release section and is in thermal contact; The second fin set is sleeved on the second heat releasing section and is in thermal contact.

In order to achieve the above object, the present invention provides a heat dissipation device including a heat conducting base and a heat sink. The heat sink includes a heat pipe, a first fin group and a second fin group. The heat pipe includes a tube body and A capillary structure and a working fluid disposed in the tube body, and the heat pipe has a heated section and a first heat releasing section and a second heat releasing section respectively extending from both ends of the heated section, and the heat receiving section is disposed at The heat-conducting seat is provided with a heat-receiving cavity inside the heat-receiving section, and the heat-receiving cavity is respectively provided in the first heat-releasing section and the second heat-releasing section. The cross-sectional area of the cavity; the first fin group is sleeved on the first heat radiation section and is in thermal contact; the second fin group is sleeved on the second heat radiation section and is in thermal contact.

The invention also has the following effects: the groove width of each first groove is larger than the groove width of each second groove, so that the liquefied working fluid can flow back to the heated section quickly. The use of the straight edges of the heated and radiated sections can increase the thermal contact area with the heat-conducting seat and each fin group to improve the heat conduction efficiency. With the capillary structure formed by each of the first grooves and each of the second grooves, it is only required to perform tube reduction processing on each heat releasing section to form unequal groove widths, which can greatly simplify the production process.

The detailed description and technical contents of the present invention are described below with reference to the drawings, but the drawings are provided for reference and description only, and are not intended to limit the present invention.

1 to 5, the present invention provides a heat sink. The heat sink 1 mainly includes a heat pipe 10, a first fin group 20 and a second fin group 30.

The heat pipe 10 includes a pipe body 11 and a capillary structure and a working fluid 13 disposed in the pipe body 11. The heat pipe 10 has a heated section 111 and a first heat releasing section 112 extending from both ends of the heated section 111 and A second heat releasing section 113 has a heat receiving capacity cavity 1111 inside the heat receiving section 111, and the first heat releasing section 112 and the second heat release section 113 have heat releasing capacity chambers 1121 and 1131 inside, respectively, and the sectional area of the heat receiving capacity cavity 1111 It is larger than the cross-sectional area of each heat release volume 1121, 1131; in other words, the pipe diameter size of the heated section 111 is larger than that of the first heat release section 112 and the second heat release section 113.

The cross section of the heated section 111 mainly includes a straight edge 1112 and a half-arc edge 1113 extending from both ends of the straight edge 1112. The aforementioned capillary structure includes a plurality of first grooves 121 and a plurality of second grooves. 122 (as shown in FIGS. 4 and 5), each of the first grooves 121 is formed on the inner wall of the flat side 1112 and the semi-circular side 1113.

The first exothermic section 112 is a flat shape, and its cross section mainly includes a pair of straight edges 1122 and a pair of semi-circular arc edges 1123 extending from both ends of each straight edge 1122. Each of the second grooves 122 To form the inner walls of the straight edges 1122 and the semi-circular edges 1123; and the groove width of each of the first grooves 121 in the heated section 111 is larger than the groove width of each of the second grooves 122 in the first heat releasing section 112. Similarly, the shape and internal structure of the second heat release section 113 are the same as those of the first heat release section 112.

Further explanation, the heat pipe 10 further includes a heat insulation section 114, which is located between the heated section 111 and the first heat release section 112; similarly, the heat insulation section 114 may also be located between the heated section 111 and the second heat release section 113 A heat insulation section 114 is formed between the heat receiving section 111, the first heat releasing section 112, and the second heat releasing section 113 at the same time, and the cross-sectional shape of the heat insulation section 114 in this embodiment is a flat shape.

The first fin group 20 is formed by stacking a plurality of heat radiating fins 21, and a corresponding groove 22 is provided on each side of each of the heat radiating fins 21. The first fin group 20 includes 22 sets of grooves. It is connected to the first exothermic section 112, and thermal contact is achieved.

The second fin group 30 is also formed by stacking and combining a plurality of heat dissipation fins 31. A corresponding groove 32 is provided on the side of each heat dissipation fin 31, and the second fin group 30 is formed by the groove 32 Socketed in the second exothermic section 113 and achieves thermal contact.

Please refer to FIG. 6. The difference between the heat pipe 10A in this embodiment and the heat pipe 10 in the foregoing embodiment is that the cross-sectional shape of each heat insulation section 114A may be a circle.

Please refer to FIG. 7. The present invention further provides a heat dissipation device, which mainly includes a heat conducting base 5 and a heat sink 1. The heat sink 1 of this embodiment includes a plurality of heat pipes 10B, a first fin group 20 and a first heat sink. The characteristics of the two fin group 30, in which each of the heat pipes 10B, the first fin group 20, and the second fin group 30 are similar to the foregoing embodiments, will not be repeated one by one, in which the heat conducting seat 5 has a uniform temperature. Plate, the heat receiving section 111 of each heat pipe 10B is flatly attached to the heat conducting seat 5 with its straight edge 1112, and the first heat releasing section 112 of each heat pipe 10B passes through the first fin group 20 and is in thermal contact; The second exothermic section 113 passes through the second fin group 30 and is in thermal contact.

Please refer to FIGS. 8 and 9, the heat conducting seat 5A of this embodiment mainly includes a heat conducting block 51 and a fixing plate 52, wherein the heat conducting block 51 can be made of copper, aluminum or an alloy thereof, and is opened on the heat conducting block 51. There are a plurality of channels 511, each channel 511 is semi-circular, wherein the cross-sectional shape of the heating section 111 of each heat pipe 10C is a circle, and each heating section 111 is arranged corresponding to each channel 511 and is combined through the fixing plate 52 .

In summary, the radiator of the present invention and the heat dissipating device using the radiator can indeed achieve the intended purpose of use, and solve the lack of knowledge. Because of its novelty and progress, it fully meets the requirements for invention patent applications.提出 File your application in accordance with the Patent Law. Please check and grant the patent in this case to protect the rights of the inventor.

1‧‧‧ radiator

10, 10A, 10B, 10C‧‧‧ heat pipes

11‧‧‧ tube body

111‧‧‧heated section

1111‧‧‧heated cavity

1112‧‧‧Straight edge

1113‧‧‧Semicircle edge

112‧‧‧The first exothermic section

1121, 1131‧‧‧Exothermic cavity

1122‧‧‧Straight edge

1123‧‧‧Semicircle edge

113‧‧‧Second Exothermic Section

114, 114A‧‧‧Adiabatic section

121‧‧‧ the first trench

122‧‧‧Second Groove

13‧‧‧working fluid

20‧‧‧The first fin group

21‧‧‧Cooling Fin

22‧‧‧Ditch

30‧‧‧Second Fin Group

31‧‧‧Cooling Fin

32‧‧‧Ditch

5, 5A‧‧‧Conductive seat

51‧‧‧Conductive block

511‧‧‧Slot

52‧‧‧Fixed plate

FIG. 1 is a combined external view of a radiator of the present invention.

FIG. 2 is an exploded perspective view of the heat sink of the present invention.

Fig. 3 is an external view of a heat pipe of the present invention.

Fig. 4 is a sectional view of a heated section of a heat pipe of the present invention.

Fig. 5 is a sectional view of a heat releasing section of a heat pipe of the present invention.

FIG. 6 is an external view of a heat pipe according to another embodiment of the present invention.

FIG. 7 is a combined external view of a heat sink of the present invention.

FIG. 8 is a combined external view of another embodiment of the heat sink of the present invention.

FIG. 9 is a partial sectional view of FIG. 8.

Claims (14)

A heat sink includes: a heat pipe including a pipe body, a capillary structure and a working fluid disposed in the pipe body, the heat pipe having a heated section and a first heat radiation respectively extending from two ends of the heated section Section and a second heat releasing section, the heat receiving section has a heat receiving capacity cavity inside, the first heat releasing section and the second heat releasing section respectively have a heat releasing capacity cavity inside, and the cross-sectional area of the heat receiving capacity cavity is larger than each A cross-sectional area of the heat release cavity; a first fin group, which is sleeved on the first heat release section and is in thermal contact; and a second fin group, which is sleeved on the second heat release section and is in thermal contact. The radiator according to claim 1, wherein a diameter of the heated section is larger than a diameter of the first and second sections. The radiator according to claim 1, wherein the capillary structure includes a plurality of first grooves and a plurality of second grooves, each of the first grooves is formed inside the heated section, and each of the second grooves is formed in the heat receiving section. Inside the first heat release section and the second heat release section, a groove width of the first groove is larger than a groove width of the second groove. The heat sink according to claim 1, wherein the cross section of the heated section includes a straight edge and a half-arc edge extending from both ends of the straight edge. The heat sink according to claim 1, wherein a cross-sectional shape of the heated section is a circle. The radiator according to claim 1, wherein the cross section of the first heat radiation section includes a pair of straight edges and a pair of semi-circular arc edges extending from both ends of each of the straight edges to form a flat shape. The heat sink according to claim 1, wherein the heat pipe further includes two heat insulation sections, one of which is between the heat-receiving section and the first heat-releasing section, and the other heat-insulating section is between the heat-receiving section. Between this section and the second exothermic section. The heat sink according to claim 7, wherein a cross-sectional shape of the heat insulation section is a flat shape or a circular shape. The heat sink according to claim 1, wherein the first fin group is formed by stacking a plurality of heat-dissipating fins, and each of the heat-dissipating fins is respectively provided with a corresponding groove. The groove is sleeved on the first heat radiation section. The heat sink according to claim 1, wherein the second fin group is formed by stacking a plurality of heat-dissipating fins, and each of the heat-dissipating fins is provided with a corresponding groove, respectively. The groove is sleeved on the first exothermic section. A heat dissipation device includes: a heat conducting base; and the heat sink according to any one of claims 1 to 10, wherein the heat receiving section is disposed on the heat conducting base. The heat dissipation device according to claim 11, wherein the heat conducting base is a temperature equalizing plate. The heat dissipation device according to claim 11, wherein the heat pipes of the heat sink are plural. The heat dissipation device according to claim 13, wherein the heat conducting base comprises a heat conducting block and a fixing plate, and the heat conducting block is provided with a plurality of channels for accommodating each of the heat pipes, and the fixing plate and the heat conducting block jointly hold each The heat pipe.