TWI458927B - Heat sink - Google Patents

Description

heat sink

The present invention relates to a cooled heat sink using a cooled component in an electronic device, such as a heat generating component such as a CPU or an MPU.

In recent years, with the realization of personal computers, the performance and miniaturization of various electrical and electronic devices have progressed remarkably. However, the high performance of CPUs, MPUs, and the like mounted on a notebook personal computer, a laptop, or a desktop personal computer increases the amount of heat generated. On the other hand, miniaturization of electric and electronic equipment is required, and the demand for space saving in electric and electronic equipment is gradually increasing.

The cooling of heat-generating components such as high-performance CPUs and MPUs often becomes an important technical issue and occupies a large proportion. In addition, in the electric and electronic devices other than the computer, the cooling of the high-performance heat-generating components and the heat-generating components is an important issue in the space-saving requirements of the electric and electronic devices, and it has a large proportion. .

In a method of cooling an electronic component mounted on an electric and electronic device, a method of directly cooling the cooled component by mounting a cooling body on the member to be cooled is known. For the cooling body to be mounted on the cooled component as shown above, most of the plate material using a material having good heat conductivity such as copper or aluminum, that is, the base plate and the surface of one of the surfaces thereof are joined to the thin plate. Heat sink (fin) heat sink.

In the base plate of the heat receiving portion that receives the heat from the cooled part The above method of disposing a thin plate fin to dissipate the heat of the cooled part is generally used as a heat sink for an electric machine. Conventionally, an aluminum extrusion material in which a base plate and a heat sink are integrally formed is used as a heat sink formed of a base plate and a heat sink provided thereon, but is used for high performance of heat dissipation performance. copper.

Although copper has good thermal conductivity, when the base plate is large or the heat source is close to the end of the base plate, the heat spreading effect (heat transfer to the entire base plate) is not sufficient, and the heat pipe or steam chamber is disposed on the base plate. (Vapor Chamber), to improve the spread of heat transfer to the entire substrate to improve heat dissipation.

The cost of the steam chamber is high. If the deep hole machining for mounting screws is not added to the design from the beginning, it cannot be matched, and there is a problem of lack of design flexibility. Further, in the shape of the block in which the heat pipe is buried in the copper, it is necessary to perform machining such as cutting on the groove portion of the heat pipe, and there is a problem that the cost becomes high. In order to solve such problems, a structure in which a heat pipe is sandwiched between two sheets such as a first plate member and a second plate member is used. With this configuration, it is not necessary to perform machining such as cutting for fixing the heat pipe, and the manufacturing cost can be reduced. Further, since a space is formed around the heat pipe, the weight of the base portion becomes light, as a whole. Lightweight can be achieved.

A space serving as a working fluid flow path is provided inside the heat pipe that moves the heat to a desired position, and the operating fluid accommodated in the space is thermally moved by phase change or movement such as evaporation or condensation. That is, on the heat absorbing side of the heat pipe, the actuating fluid evaporates due to the heat generated by the cooled component transmitted by the heat transfer in the material of the container constituting the heat pipe. The gas moves to the heat sink side of the heat pipe. On the heat dissipating side, the vapor of the actuating fluid is cooled and returned to the liquid phase again. The actuating flow system recovered to the liquid phase as shown above is again moved (also flowed) to the endothermic side. The movement of heat is performed by the phase change or movement of the actuating fluid as indicated above.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-198173

[Patent Document 2] Japanese Patent Laid-Open No. Hei 10-107192

In the structure in which the heat pipe is sandwiched between two sheets of the first plate material and the second plate material, the end portion of the heat pipe extends only in one of the width or the longitudinal direction of the sheet material, but is in contact with the cooled portion. The plurality of heat pipe portions are disposed in the center portion in order to efficiently move heat from the cooled parts, so that a space is formed in the side portion of the heat pipe, and the heat sink at a position corresponding to the space portion is not sufficiently heat-conducted. The problem of insufficient heat dissipation.

Further, in order to transfer the heat to the space portion of the side surface of the heat pipe, if the metal block is buried in the entire heat sink, machining such as cutting the groove portion of the heat pipe is complicated as described above. And there will be problems with higher costs.

Accordingly, it is an object of the present invention to provide a high performance heat sink that is less machined, lightweight, and low cost, and that can improve heat dissipation performance.

The inventors have continually studied carefully to solve the problems of the prior art. As a result, it was found that the direction in which the end portion of the heat pipe expanded was extended by the heat pipe and the first plate, and the side portion of the heat pipe was thermally connected to the metal block having good heat conductivity, thereby eliminating the need for full use of the heat sink. The metal block can effectively spread the heat to the end direction and the side direction of the heat pipe.

A first aspect of the heat sink according to the present invention is a heat sink characterized by comprising: a first heat transfer plate, wherein one of the surfaces is thermally connected to the heat generating component, and the heat sink is thermally connected a first heat sink portion; the second heat transfer sheet is thermally connected to a second heat sink portion formed of a thin plate fin; and a heat pipe is attached to the first heat transfer sheet The other surface is thermally connected to the other surface of the second heat transfer plate; and the heat transfer block is thermally connected to the side surface and the lower surface of the heat pipe to be in contact with the second heat transfer plate The heat transfer block is disposed to be thermally connected to each other, and the heat transfer block has two end block portions that are respectively located at the side end portions of the side faces of the heat pipes and are connected to each other; a heat receiving portion that thermally connects the connecting portions of the two end block portions to the two end block portions, and is disposed in thermal connection with the first heat transfer plate in a longitudinal direction of the heat pipe. The two end block portions are respectively in the shape of a block, and the heat pipe side is The sides of the two end block portions are respectively in contact with the sides of the heat pipe For thermal connection, the connecting portions of the two end block portions are formed in a plate shape, and the heat receiving portion has a plate shape, wherein one surface is connected to the heat generating component, and the other surface is heated to the lower surface of the heat pipe. In the heat pipe, the upper and lower surfaces of the heat pipe are sandwiched between the connecting portions of the two end block portions, and between the first heat transfer plate and the second heat transfer plate, and the side of the heat pipe The first heat transfer plate, the second heat transfer plate, and the heat transfer block are thermally connected to each other between the two end block portions.

In the second aspect of the heat sink of the present invention, the heat transfer block is connected to the two end block portions by the heat receiving portion.

In a third aspect of the heat sink according to the present invention, the heat pipe is provided with at least a part of a plurality of heat pipes having a bent portion and arranged in parallel, wherein the heat transfer block is located at both end portions of the plurality of heat pipes arranged in parallel The side of the heat pipe at the location and the underside of the plurality of heat pipes are configured for thermal connection.

In a fourth aspect of the heat sink according to the present invention, the first fin portion is formed by a plurality of parallel thin plate fins disposed perpendicular to a surface of the first heat transfer sheet, and is formed on the first heat transfer sheet. One of the end portions in the longitudinal direction is provided at a predetermined interval along the width direction of the first heat transfer sheet.

In a fifth aspect of the heat sink according to the present invention, the second fin portion is formed by a plurality of parallel thin plate fins disposed perpendicular to a surface of the second heat transfer sheet, along the second heat transfer sheet. The long-side direction is generally comprehensive.

In the sixth aspect of the heat sink of the present invention, the plurality of heat pipes are The heat pipe of a flat shape is configured such that at least the central portion is in contact with each other and arranged in parallel, and the bent portion of a part of the heat pipes of the plurality of heat pipes is along the aforementioned second heat transfer plate in which the second heat sink portion is disposed The ends are configured.

In a seventh aspect of the heat sink according to the present invention, the plurality of heat pipes are formed of flat heat pipes, and the heat pipes are disposed in parallel with each other without being in contact with each other, and the heat pipes of the plurality of heat pipes are a part of the heat pipes. The bent portion is disposed along the end portion of the second heat transfer sheet on which the second fin portion is disposed.

In the eighth aspect of the heat sink according to the present invention, the plurality of heat pipes are arranged symmetrically or asymmetrically around the linear heat pipe disposed at the center along the longitudinal direction of the second heat transfer sheet.

In a ninth aspect of the heat sink of the present invention, the fixing member is provided in a state in which the heat transfer pipe is sandwiched between the first heat transfer plate and the second heat transfer plate, and is fixed around the heat sink. unit.

According to the heat sink of the present invention, the heat pipe is sandwiched between two sheets of the first plate material and the second plate material, and at least one heat pipe is expanded in the longitudinal direction or the end portion of the plurality of heat pipes is directed to the plate. The longitudinal direction and the wide direction are expanded, and the portions of the plurality of heat pipes that are in contact with the cooled parts are concentrated in the central portion, and the blocks having the heat conductivity are disposed in the spaces formed in the side portions of the heat pipes, respectively The heat is also transmitted to the heat sink at a position corresponding to the space portion, so that the heat dissipation performance can be improved.

The heat sink of the present invention will be described with reference to the drawings.

In one aspect of the heat sink of the present invention, the first heat transfer plate is provided, wherein one of the surfaces is thermally connected to the heat generating component, and the first heat sink portion composed of the thin plate heat sink is thermally connected; a heat transfer plate in which one of the surfaces is thermally connected to a second fin portion composed of a thin plate fin; and a heat pipe is provided on the other surface of the first heat transfer plate and the second pass a thermal connection between the other faces of the hot plates; and a heat transfer block thermally coupled to the sides and the lower surface of the heat pipe to sandwich the heat pipe between the second heat transfer plate Hot connection configuration.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view showing an aspect of a heat sink of the present invention. Fig. 2 is a view showing the back surface of the first aspect of the heat sink of the present invention. As shown in Fig. 1 and Fig. 2, in the heat sink shown in Fig. 1, the two first heat transfer sheets 2-1 and 2-2 are thermally connected to each other on the back side. The heat block 6 is disposed in the state. The heat transfer block 6 is provided with two end block portions 6-1 and 6-2 located at the two side end portions and a heat receiving portion 10 that connects the both end block portions, and the heat transfer block 6 is integrated. form. The both end block portions 6-1 and 6-2 of the heat transfer block 6 are blocks having a thickness, and the connected heat receiving portions 10 are formed in a plate shape thinner than the both end block portions. A thin plate-like connecting portion may be provided at a position of the heat receiving portion 10 of the heat transfer block 6, and the heat receiving portion 10 may be thermally bonded thereto. The heat generating component 20 as a heat source is connected to the heat receiving portion 10 (see Fig. 5).

As shown in Fig. 1, on the upper surface side of the heat sink 1, the first heat transfer is performed. The second heat transfer plate 3 is provided in such a manner that the plates 2-1 and 2-1 and the heat transfer block 6 face each other. Between the second heat transfer plate 3 and the first heat transfer plates 2-1 and 2-2 and the heat transfer block 6, as shown by the broken line in Fig. 2, the plurality of heat pipes 7-1 to 7-5 are sandwiched. It is configured in a state of being thermally connected.

The surface above and below the plurality of heat pipes 7-1 to 7-5 is in thermal contact with the first heat transfer members 2-1 and 2-2 and the heat receiving portion 10. Further, the both end block portions 6-1 and 6-2 of the heat transfer block 6 have a block shape having a thickness, and the side faces of the heat pipe sides of the both end block portions 6-1 and 6-2 are respectively the outermost side and the outermost side. The sides of the heat pipes 7-5, 7-1 are in contact with each other for thermal connection.

One of the end portions of the first heat transfer plate 2-1 that is not in contact with the heat pipe (the lower side in FIG. 1) is composed of a plurality of thin plate fins arranged at a predetermined pitch (heat sink pitch) The first fin portion 5 is formed to be joined in a state of being thermally connected to the first heat transfer plate member 2-1. Further, the surface of the second heat transfer sheet 3 that is not in contact with the heat pipe (the upper side in FIG. 1) is formed over a whole, and is composed of a plurality of thin plate fins arranged at a predetermined fin pitch. The second fin portion 4 is joined in a state of being thermally connected to the second heat transfer plate member 3.

The first fin portion 5 joined to the first heat transfer member 2-1 and the second fin portion 4 joined to the second heat transfer plate member 3 may not necessarily be integrally formed as an extruded material. The fin portion is formed by bonding the surface of the plurality of thin plate fin heat transfer sheets at a desired fin pitch.

As described above, between the heat transfer portions 10 of the first heat transfer sheets 2-1 and 2-2 and the heat transfer block 6 and the second heat transfer plate 3, the plurality of heat pipes 7-1 to 7 are sandwiched. -5 for hot connection. In the aspect shown in Figure 2, the system is arranged side by side. 5 heat pipes. The shape of the heat pipe is preferably such that the contact areas of the first heat transfer plates 2-1 and 2-2 and the heat transfer block 6 and the second heat transfer plate 3 are increased, and in the aspect of Fig. 2, the flat shape is good. The plurality of heat pipes 7-1 to 7-5 are disposed in a position sandwiched between the center portion in the longitudinal direction of the second heat transfer sheet 3 and the heat transfer block 6 without any gap in a state in which they are in contact with each other. .

Further, the plurality of heat pipes 7-1 to 7-5 are disposed on the side of the first fin portion 5 in addition to one heat pipe 7-3 disposed at the center, and are oriented toward the width of the first and second heat transfer sheets. The direction is extended and configured. In particular, the end portions of a part of the heat pipes 7-2 and 7-4 are bent at right angles and are arranged to extend in the width direction along the first fin portion. The other ends of the heat pipes 7-1 and 7-5 are disposed so as to extend toward the width direction of the second heat transfer sheet, and are configured to be heat-transferred in the width direction of the heat transfer sheet. The entire heat transfer of the thin plate fins joined to the second heat transfer plate 3 is performed.

The plurality of heat pipes 7-1 to 7-5 are located at positions other than the heat transfer block 6 and are heated up and down in the state of being sandwiched between the first heat transfer plates 2-1 and 2-2 and the second heat transfer plate 3. connection. Further, the plurality of heat pipes 7-1 to 7-5 are disposed at the position of the heat transfer block 6, and are disposed without gaps in a state where the plurality of heat pipes 7-1 to 7-5 are in contact with each other in the central portion in the width direction. The upper and lower sides are thermally connected to each other while being sandwiched between the second heat transfer plate 3 and the heat receiving portion 10, and the side faces of the heat pipes 7-1 and 7-5 disposed outside are respectively blocked with the both ends of the heat transfer block 6. Parts 6-2 and 6-1 are in contact.

The surface of the heat receiving portion 10 of the heat transfer block 10 that is not in contact with the heat pipes 7-1 to 7-5 forms a heat receiving surface that is connected to the heat source, and the heat absorbed by the heat receiving surface is transmitted to the heat pipe 7-1~ 7-5. By being configured as shown above, in the heat receiving portion 10 The heat absorbed by the heated surface can be transmitted from the underside and the side of the plurality of heat pipes through the heat transfer block 6, so that heat can be more efficiently transmitted to the heat pipe.

Here, the heat pipes are preferably disposed in a state in which the side faces are in contact with each other as described above, but the heat pipes may be disposed in parallel with each other without being in contact with each other. Even in a state where the heat pipes are not in contact with each other, heat is transmitted to the respective heat pipes through the heat receiving portion 10.

In the aspect shown in Fig. 2, the both end block portions 6-1, 6-2 of the heat transfer block 6 are in contact with the heat pipes 7-1, 7-5 of the two outer sides of the plurality of heat pipes arranged side by side. The side surface of the linear portion of the center portion is arranged. The both end block portions 6-1 and 6-2 are connected by the heat receiving portion 10, and the heat receiving portion 10 is disposed to be thermally connected to the lower surface of the central portion of the heat pipe. That is, as described above, the plurality of heat pipes 7-1 to 7-5 are sandwiched between the heat transfer blocks 6 and the first heat transfer plates 2-1 and 2-2 and the second heat transfer plate 3, The heat transfer block 6 is sandwiched between the heat transfer block 6 and the second heat transfer plate 3 in the upper, lower, left, and right directions.

The upper surfaces of the both end block portions 6-1 and 6-2 are joined to the second heat transfer plate member 3 by solder or the like. Thereby, the heat from the heat receiving unit 10 can be more efficiently transmitted to the second heat transfer plate member 3. The both end block portions 6-1 and 6-2 and the second heat transfer plate member 3 are other members different from the first heat transfer plates 2-1 and 2-2, and the first heat transfer plate 2-1, 2-2 and the second heat transfer plate 3 are preferably fixed by solder joint or the like in a contact portion (for example, a fixing portion 8 of a four-corner to be described later). Further, it is preferable that the first heat transfer sheets 2-1 and 2-2 and the heat transfer block 6 are fixed by solder joint or the like in the contact portion.

The heat transmitted from the heat generating component (heat source) to the heat receiving portion 10 is transmitted from the back surface of the heat receiving portion 10 to the plurality of heat pipes, and is extended to the lateral direction to Both end block sections 6-1, 6-2.

That is, the heat transmitted from the heat generating component to the heat receiving portion 10 is transmitted to the plurality of heat pipes 7-1, 7-2, 7-3, 7-4, 7 which are in direct contact with the opposite side of the heat receiving surface of the heat receiving portion 10. Further, the heat of the heat receiving unit 10 is transmitted to the both end block portions 6-1 and 6-2, and is also transmitted to the side faces of the heat pipes 7-1 and 7-5. Further, since the both end block portions 6-1 and 6-2 and the heat pipe system are thermally connected to the second heat transfer plate member 3, the heat received by the heat receiving portion 10 is transmitted to the second heat transfer. Plate 3 is approximately all areas. As a result, the heat is transferred to the second fin portion 4 composed of a plurality of thin plate fins joined to the entire upper surface of the second heat transfer sheet 3, and is radiated from the fins to the outside of the heat sink.

Figure 3 is a top view of one aspect of the heat sink of the present invention. As shown in Fig. 3, in addition to the fixing portions 8 for fixing the four corners of the first heat transfer sheets 2-1 and 2-2 and the second heat transfer sheet 3, a plurality of thin plate fins arranged in parallel at a predetermined fin pitch are arranged. It is approximately the whole of the surface (the upper surface of the figure) which is joined to one of the second heat transfer sheets 3 .

The first cover member 9-1 is provided on one end side of the second heat sink portion 4, and the second cover member 9-2 is provided on both side portions of the center portion of the heat sink 10. The first and second lid members 9-1 and 9-2 are used as a lid member for attaching the heat sink of the present invention, and those having a cushioning property are preferable, and a porous resin such as a sponge may be used.

Figure 4 is a front elevational view of one aspect of the heat sink of the present invention. As shown in Fig. 4, a thin plate fin is thermally connected to one end portion of the first heat transfer plate 2-1 opposite to the surface in contact with the heat pipe (the lower side in Fig. 4). The first fin portion 5 is configured. The plurality of thin plate fins of the first fin portion are arranged along the longitudinal direction of the first heat transfer sheets 2-1 and 2-2.

The second fin portion 4 composed of the thin plate fins is thermally connected to the entire surface of the second heat transfer plate 3 opposite to the surface (the upper side in FIG. 4) that is in contact with the heat pipe. The plurality of thin plate fins of the second fin portion 4 are also arranged along the longitudinal direction of the second heat transfer sheet 3.

The first fin portion 5 and the second fin portion 4 are formed on the first heat transfer sheets 2-1 and 2-2 and the second heat transfer sheet 3 at a desired fin pitch. Between the first heat transfer sheets 2-1 and 2-2 and the second heat transfer sheet 3, the plurality of heat pipes 7-1 to 7-5 which are juxtaposed in a sandwich shape are thermally connected.

In the vicinity of the center portion in the longitudinal direction of the second heat transfer sheet 3, the plurality of heat pipes 7-1 to 7-5 are placed in contact with each other without a gap. The central portion of the plurality of heat pipes is thermally connected to the heat transfer block 6 having good heat transfer properties. The heat transfer block 6 is integrally formed with a heat receiving portion 10 at the center portion and metal side portions 6-1 and 6-2 having good heat transfer properties. The heat from the heat generating component (heat source) to the heat receiving portion 10 of the heat transfer block 6 belonging to the heat receiving surface is transmitted to the plurality of heat pipes 7-1, 7-2, 7-3, 7-4, 7-5, and The side block portions 6-1 and 6-2 are transmitted to the longitudinal and lateral directions of the second heat transfer sheet 3 by the plurality of heat pipes 7-1 to 7-5 and the both end block portions 6-1 and 6-2. Probably all areas.

Fig. 5 is a side view of the heat sink shown in Fig. 1. The first end of the first heat transfer sheets 2-1 and 2-2 that is not in contact with the heat pipe (the lower side in FIG. 5) is thermally connected to the first end of the thin plate fin. Heat sink portion 5. The heat transfer block 6 is thermally connected between the first heat transfer sheets 2-1 and 2-2. The surface (on the upper side in FIG. 5) of the second heat transfer sheet 3 on the side not adjacent to the heat pipe is disposed so as to be thermally connected to the second fin portion 4 composed of the thin plate fins.

Figures 6 through 10 are diagrams for explaining other aspects of the heat sink of the present invention. Figure 6 is an oblique view. Figure 7 is a diagram showing the back side. Figure 8 is the above figure. Figure 9 is a front view. Figure 10 is a side view. The details are the same as those described with reference to FIGS. 1 to 5 except for the cover members 9-1 and 9-2 which cover a part of the heat sink.

The first heat transfer sheets 2-1 and 2-2 and the second heat transfer sheet 3 are sandwiched and held in a state of being thermally connected to the first fin portion 5 and the second fin portion 4, respectively. In the case of the plurality of heat pipes 7-1 to 7-5 arranged in parallel, they are fixed by the fixing portion 8. The plurality of heat pipes are disposed in a state in which they are thermally connected to the metal heat transfer block 6 having good heat conductivity in the center portion. In the same manner as described above, the heat transfer block 6 is formed integrally with the heat receiving portion 10 by the metal end portions 6-1 and 6-2 which are formed on both sides.

The block is disposed by being in contact with the linear side surface portion of the central portion of the two outer heat pipes 7-1, 7-5 and the lower surface of the central portion of the plurality of heat pipes 7-1 to 7-5. In the heat transfer block 6 composed of the portions 6-1 and 6-2 and the heat receiving portion 10, the heat of the heat generating component is spread in the lateral direction. As a result, heat spreads over the entire heat sink, and heat is dissipated to the outside of the heat sink through the heat sink.

Fig. 11 is a cross-sectional view showing the shape in which the thin plate fins of the heat sink of the present invention are joined to the heat transfer sheets (2-1, 2-2, or 3). The thin plate heat sink can be used in various shapes to meet the requirements of the heat sink configuration place and configurable space. In addition, thin fins of various shapes can be freely combined.

In the aspect shown in Fig. 11(a), the profile formed by the bottom surface, the vertical surface, and the upper surface The thin plate fins of the word shape are arranged side by side in the lateral direction to form the fin portion 4. In this aspect, the plurality of bottom surfaces are arranged side by side to form a flat heating surface, and the first heat transfer sheets 2-1 and 2-2 or the second heat transfer sheet 3 are thermally connected to the flat heating surface. At the same time, the upper surface of the plurality of fins arranged side by side also forms a flat surface. In the connection method of the thin plate fins, other various known techniques such as solder connection, soldering, and the like can be employed (the same applies to other examples).

In the aspect shown in Fig. 11(b), the thin plate fins having the L-shaped cross section formed by the bottom surface and the vertical surface are arranged side by side in the lateral direction to form the fin portion 4. In this aspect, a plurality of bottom surfaces are also arranged in parallel to form a flat heat receiving surface, and the fin portion 4 is opened on the upper surface side.

In the aspect shown in Fig. 11(c), the above-mentioned cross section composed of the bottom surface, the vertical surface, and the upper surface is appropriately combined. The heat sink portion 4 is formed by a thin-plate heat sink having a shape of a word and a thin-plate heat sink having an L-shaped cross section formed by a bottom surface and a vertical surface. The combination is not limited to the illustrated embodiment, and the fin portion 4 described with reference to Fig. 11(c) may be disposed on both end sides, and the fins described in Fig. 11(a) may be combined in the center portion. Department and other random combinations.

The thin plate fins of the aspect shown in FIGS. 11(a) to 11(c) are joined and fixed to the first heat transfer plate 2 or the second heat transfer plate 3 by soldering, welding or the like. In the case of the first heat transfer sheets 2-1 and 2-2 and the second heat transfer sheet 3, the thin plate fins of the first embodiment shown in FIGS. 11(a) to (c) may be the same. The thin plate heat sink and the different thin plate heat sinks are properly combined. For example, the thin plate fins shown in Fig. 11(a) can be attached to the lower surface of the first heat transfer sheet 2-1, and the upper surface of the second heat transfer sheet 3 can be attached as shown in Fig. 11(b). Thin plate heat sink.

As described above, with the heat sink of the present invention, it is possible to provide a high-performance heat sink which is less machined, lightweight, and low in cost, and which can improve heat dissipation performance.

1‧‧‧heatsink

2-1, 2-2‧‧‧1st heat transfer sheet

3‧‧‧2nd heat transfer sheet

4‧‧‧2nd heat sink

5‧‧‧1st heat sink

6‧‧‧heat transfer block

6-1, 6-2‧‧‧ both ends

7-1~7-5‧‧‧heat pipe

8‧‧‧ Fixed Department

9-1, 9-2‧‧‧ covers

10‧‧‧heating department

20‧‧‧Fever parts

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view showing an aspect of a heat sink of the present invention.

Fig. 2 is a view showing the back side of one aspect of the heat sink of the present invention.

Figure 3 is a top view of one aspect of the heat sink of the present invention.

Figure 4 is a front elevational view of one aspect of the heat sink of the present invention.

Figure 5 is a side elevational view of one aspect of the heat sink of the present invention.

Figure 6 is a perspective view for explaining another aspect of the heat sink of the present invention.

Figure 7 is a view showing the back side of another aspect of the heat sink of the present invention.

Figure 8 is a top view of another aspect of the heat sink of the present invention.

Figure 9 is a front elevational view of another aspect of the heat sink of the present invention.

Figure 10 is a side elevational view of another aspect of the heat sink of the present invention.

Figure 11 is a cross-sectional view for explaining the shape of a thin plate fin of the heat sink of the present invention.

2-1, 2-2‧‧‧1st heat transfer sheet

5‧‧‧1st heat sink

6‧‧‧heat transfer block

6-1, 6-2‧‧‧ both ends

7-1~7-5‧‧‧heat pipe

9-2‧‧‧Cleaning pieces

10‧‧‧heating department

Claims (9)

A heat sink characterized by comprising: a first heat transfer plate, wherein one of the surfaces is thermally connected to the heat generating component, and the first heat sink portion composed of the thin plate heat sink is thermally connected; a hot plate having a second fin portion formed of a thin plate fin thermally connected to one surface thereof, and a heat pipe attached to the other surface of the first heat transfer plate and the second heat transfer plate a thermal connection between the other faces; and a heat transfer block thermally connected to the side and the bottom of the heat pipe to heat the heat pipe between the second heat transfer plate and the second heat transfer plate In the connection arrangement, the heat transfer block has two end block portions which are respectively located at the side end portions of the side faces of the heat pipes and are connected to each other, and a joint portion provided at the two end block portions And a heat receiving portion thermally connected to the two end block portions, wherein the heat transfer portion of the heat pipe is thermally connected to the first heat transfer plate, and the two end block portions are respectively a block shape, the side faces of the two end block portions on the heat pipe side are respectively The side surfaces of the heat pipes are in thermal contact with each other, and the connecting portions of the two end block portions are formed in a plate shape, and the heat receiving portion has a plate shape, and one of the surfaces is connected to the heat generating component, and the other surface is connected. The heat pipe is thermally connected to the lower surface of the heat pipe, wherein the upper and lower surfaces of the heat pipe are sandwiched between the connecting portions of the two end block portions, the first heat transfer plate, and the second heat transfer plate. Between the sides of the heat pipe is sandwiched between two of the two end blocks The first heat transfer plate, the second heat transfer plate, and the heat transfer block are thermally connected to each other. The heat sink according to claim 1, wherein the heat transfer block is connected to the two end block portions by the heat receiving portion. The heat sink according to claim 2, wherein the heat pipe is provided with at least a part of a plurality of heat pipes having a bent portion and arranged in parallel, wherein the heat transfer block is located at both ends of the plurality of heat pipes arranged in parallel The location of the heat pipe and the underside of the plurality of heat pipes are configured for thermal connection. The heat sink according to claim 3, wherein the first fin portion is composed of a plurality of parallel thin plate fins disposed perpendicular to a surface of the first heat transfer sheet, and the first heat transfer sheet is formed. One of the end portions of the longitudinal direction or the entire length is provided at a predetermined interval along the width direction of the first heat transfer sheet. The heat sink according to claim 3, wherein the second heat sink portion is formed by a plurality of parallel thin plate fins disposed perpendicular to a surface of the second heat transfer sheet, along the second heat transfer. The long side of the sheet is designed to be comprehensive. The heat sink according to any one of claims 3 to 5, wherein the plurality of heat pipes are composed of flat-shaped heat pipes, at least in a central portion, and are arranged in parallel with each other, the plurality of heat pipes The bent portion of a part of the heat pipes is disposed along the end portion of the second heat transfer sheet on which the second fin portion is disposed. For example, the heat sink of any one of the third to fifth patent claims, The plurality of heat pipes are formed of flat heat pipes, and the heat pipes are arranged in parallel with each other without being in contact with each other, and the bending portion of the heat pipes of the plurality of heat pipes is arranged along the second portion. The end portion of the second heat transfer sheet of the fin portion is disposed. The heat sink according to any one of claims 3 to 5, wherein the plurality of heat pipes are centered on a linear heat pipe disposed at a center along a longitudinal direction of the second heat transfer sheet It is configured to be symmetrical or asymmetrical. The heat sink according to any one of claims 1 to 5, further comprising a fixing member, wherein the heat pipe is sandwiched between the first heat transfer plate and the second heat transfer plate In the state of the heat sink, it is fixed around the heat sink.