JP2002280505A - Cooling module - Google Patents

Abstract

(57) [Problem] A CPU of a personal computer or the like is destroyed by heat generation. Therefore, the CPU is joined to a cooling module, and a radiation fin in a cooling module main body is forcibly cooled by a fan, and a cooling module is provided. The heat pipe is added to the heat pipe so that the cooling and heat radiation are increased by the operation of the heat pipe. However, since the temperature decreases from the root to the tip of the heat radiation fin, the heat exchange of the heat radiation fin is not good. SOLUTION: Two pieces 13a, 13 provided on the inside of a main body 7 and on the inside of a lid plate 12, respectively, and having opposing tip sides.
b, the heat fin 13 is formed, and the heat pipe 15 thermally connected to the heat generating component 18 is connected to the two pieces 13a, 13a.
b is a cooling module having a configuration in which the heat is connected to the center of the radiating fin 13 by sandwiching it at the tip side thereof, and the heat from the heat pipe 15 is transmitted to the tip of the radiating fin 13 and the fin 13 is effectively turned by the fan. Allow for forced cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling module used for cooling a heat-generating component such as a CPU in a personal computer or other electronic equipment.

[0002]

2. Description of the Related Art Generally, a CPU is used as a functional component in an electric device, for example, a small electronic device such as a multifunctional and high-performance personal computer.
Generates heat and breaks down at about 90 ° C or higher.
A cooling device is attached to the CPU to dissipate the heat generated by the CPU to ensure the safety of the equipment.

As the cooling device, a small one is demanded, and a normal cooling module having radiation fins cannot sufficiently cool the cooling device. Therefore, as shown in a perspective view of another conventional cooling module in FIG. A heat-generating component 2 such as a CPU is joined to an outer thermal interface portion of a flat main body 1 made of aluminum die-cast as a heat conductive material, and a fan 3 and a plurality of radiating fins 4 cooled by the fan 3 are provided inside the main body 1. A cooling module having a configuration provided with the above has been used. Then, the heat of the heat-generating component 2 is guided to the main body 1, and the radiation fins 4 and the main body 1 are forcibly cooled by the heat sink action of the main body 1 and the wind generated by the rotation of the fan 3, so that the radiation cooling is performed.

FIG. 8 is a perspective view of another conventional cooling module, FIG. 9 is a perspective view showing a back surface of the cooling module of FIG. 8, and FIG. 10 is a sectional view of a heat pipe joint of the cooling module. As shown in FIGS. 8 to 10, a heat pipe 5 is added to the cooling module having the configuration of FIG. 7, and this heat pipe 5 is connected to a thermal interface portion outside the main body 1 so as to be able to exchange heat. Cooling modules that allow heat to escape to the radiating fins 4 and the main body 1 have also been developed. The heat pipe 5 is well known, but as shown in the cross-sectional view of the heat pipe in the same cooling module in FIG. 11, a capillary portion 5 is formed in a pipe 5a made of a metal having good heat conductivity such as copper.
b is provided and a liquid is sealed. The heat pipe 5 receives heat at one end and vaporizes the liquid inside, sends it to the extension, and returns the gas to the liquid by releasing the liquid to the radiating fins 4 and the main body 1 at the extension. The heat is transmitted to one end receiving heat through the portion 5b. A heat exchange effect is obtained by this series of operations, a larger cooling effect is obtained, and the heat of the heat generating component 2 is effectively radiated. It is.

[0005]

Incidentally, recent notebook personal computers and the like generate heat at a high temperature because the operating frequency of the CPU and the like for image processing and the like is extremely high. Therefore, it is difficult to sufficiently cool the cooling module. In the cooling module described above, the heat pipe 5 is fitted into a groove formed outside the main body 1, and the heat pipe 5 is arranged so as to be continuous from the thermal interface portion outside the main body 1 to the outside part of the radiation fins 4. Because of this structure, the temperature decreases from the root to the tip of the radiating fin 4, and the heat exchange of the radiating fin 4 is not good. Therefore, the temperature of the heat-generating component 2 such as a CPU that handles a high frequency for image processing or the like cannot be significantly reduced, and it is difficult to reduce the size of the cooling module.

An object of the present invention is to provide a cooling module having a high cooling effect by improving the heat radiating performance of the heat radiating fins while paying attention to the above conventional problems.

[0007]

According to the present invention, in order to achieve the above object, a fan and a plurality of radiating fins cooled by the fan are provided inside a main body, and are connected to a thermal interface so as to be capable of heat exchange. In a cooling module including a heat pipe, the heat pipe is thermally connected to a center portion of the radiation fin.

According to the present invention, heat from a heat pipe receiving heat from a heat-generating component such as a CPU is transmitted to the tip of the radiating fin, and the radiating fin can be effectively forcibly cooled by a fan. Even for a heat-generating component such as a CPU that handles a very high frequency, the temperature can be greatly reduced to prevent thermal destruction, and the size of the cooling module can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a heat generating component such as a CPU is joined to an outer thermal interface portion, and a fan and a plurality of radiating fins cooled by the fan are provided inside a main body. A cooling module made of a metal having good heat conductivity and having a heat pipe connected to the thermal interface section so as to be capable of exchanging heat, wherein the cooling module guides the heat pipe inside a main body, and a center section of the heat radiation fin. A cooling module that is thermally connected to a heat pipe, heat from a heat pipe receiving heat from a heat-generating component such as a CPU is transmitted to the tip of the heat-radiating fin, and the heat-radiating fin can be effectively forcibly cooled by a fan. Has the effect that the temperature of the substrate can be greatly reduced.

According to a second aspect of the present invention, in the cooling module according to the first aspect, each radiating fin comprises:
The heat pipe is composed of two pieces provided on the inner side of the main body and the inner side of the lid plate, respectively, and the tip sides are opposed to each other.
It is configured so that it is sandwiched between the tip sides of the two pieces and is thermally connected to the center of the radiating fin. This has the effect of facilitating the assembly of the pipe.

According to a third aspect of the present invention, in the cooling module according to the second aspect, the two pieces constituting the radiating fin are recessed in which the heat pipe is fitted on a tip side for pressing the heat pipe. The heat pipe is positioned with respect to the radiation fin,
This has the effect of facilitating assembly, stabilizing the assembly state, and effectively transmitting heat from the outer periphery of the heat pipe to the center of the radiation fin.

According to a fourth aspect of the present invention, in the cooling module according to the second or third aspect, the distance between the tip sides of the two pieces constituting the radiation fin is smaller than the outer diameter of the heat pipe. When the heat pipe is sandwiched between the tip sides of the two pieces constituting the heat radiation fin, the tip side bites into the outer periphery of the heat pipe, thereby stabilizing the assembly state of the heat pipe. This has the effect that heat can be effectively transmitted from the outer periphery of the heat pipe to the center portion of the radiation fin.

According to a fifth aspect of the present invention, in the cooling module according to any one of the first to fourth aspects, the heat radiation fins are thermally connected to the heat pipe by interposing heat conductive silicon grease or solder. Connected to
Even if there is a gap between the contact part of the heat pipe and the radiation fin,
This has the effect that heat can be effectively transmitted to the radiating fins from the outer periphery of the heat pipe via heat conductive silicon grease or solder.

According to a sixth aspect of the present invention, in the cooling module according to any one of the first to fifth aspects, the heat pipe intersects the tip side of the radiating fin at an angle within 60 ° from the vertical. The heat pipe has an effect that the outer periphery of the heat pipe effectively contacts the tip side of the radiating fin and stabilizes the assembly state of the heat pipe to the radiating fin.

According to a seventh aspect of the present invention, in the cooling module according to any one of the first to sixth aspects, the main body and the cover plate are made of die-cast, and the radiation fins are integrally formed. Since the radiating fins are not assembled, the production of the fins is facilitated.

According to an eighth aspect of the present invention, in the cooling module according to any one of the first to sixth aspects, the radiating fins are formed by sheet metal, and the heat radiating fins receive heat from the heat generating components. Heat from the pipe is transmitted to the tip of the radiating fin, and the fan can be effectively forcibly cooled by the fan.

According to a ninth aspect of the present invention, a heat-generating component such as a CPU is joined to the outer thermal interface portion, and a radiation fin composed of a fan and a plurality of sheet metals cooled by the fan is provided inside the main body. Provided is a cooling module made of a metal having good heat conductivity, comprising a heat pipe connected to the thermal interface part so as to be able to exchange heat, wherein the radiation fin made of a sheet metal has a diameter in the center portion larger than the outer diameter of the heat pipe. A cooling module having a small, and having a heat pipe insertion hole formed with a plurality of cuts in the hole edge, press-fitting the heat pipe into the heat pipe insertion hole and thermally connecting the heat pipe to the center of the radiation fin. Yes, the connection between the heat pipe and the radiating fins is secure, and the heat can be effectively transmitted to the radiating fins from the outer periphery of the heat pipe. It has the effect of kill.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view of a cooling module according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing the inside of a main body of the cooling module, and FIG. FIG. 4 is a perspective view of a radiation fin portion of the cooling module, and FIG. 5 is a cross-sectional view of a radiation fin portion of the cooling module.

As shown in FIG. 1, in the cooling module according to the first embodiment, the main body 7 is formed as a flat casing by aluminum die casting. The main body 7 has a part as a fan chamber 8 and a heat exchange chamber 9 connected to the fan chamber 8. The fan chamber 8 has an air suction port 10 and is equipped with a flat fan 11 inside. The heat exchange chamber 9 is covered with a cover plate 12 made of die-cast, has a plurality of radiating fins 13 therein, and has an air outlet 1 on one side.
4 is provided.

Each of the radiating fins 13 is integrally provided on the inner side of the main body and the inner side of the cover plate 12, and is formed by two pieces 13a and 13b whose tip sides are opposed to each other. More specifically, the two pieces 13a and 13b forming the heat radiation fin 13 are provided so as to form a gap between the tip sides thereof, which is slightly smaller than the outer diameter of the heat pipe 15 described below. In the figure, the outer diameter of the heat pipe 15 is 4 mm, and the gap is 3.2 mm. In addition, the two pieces 13a and 13b form a recess 13c in a tip side of the shape in which a part of the outer periphery of the heat pipe 15 is fitted.

The main body 7 is integrally provided with a seat plate 16 for mounting a heat-generating component, and a heat-generating component 18 such as a CPU is joined to a thermal interface 17 thereof. The thermal interface 17 on the seat plate 16
A groove 19 extending from a portion corresponding to the thermal interface portion 17 to the heat exchange chamber 9 is formed on the surface on the opposite side to the heat pipe 15, and the heat pipe 15 fitted in the groove 19 is guided to the heat exchange chamber 9, The portion guided to the heat exchange chamber 9 is joined to the center of each radiating fin 13. More specifically, the heat pipe 15 is fitted into the recess 13c on the tip side of the two pieces 13a and 13b constituting each heat radiation fin 13, and is joined by pressing the tip pieces of the two pieces 13a and 13b. At this time, the gap between the tip sides of the two pieces 13a and 13b is provided so as to form a gap slightly smaller than the outer diameter of the heat pipe 15, so that the two pieces 13a and 13b are formed.
The tip side of b is cut into the outer surface of the heat pipe 15 and joined. In addition, the heat pipe 15 and the radiation fin 13
In the joining of the heat radiating fins 13
The pieces 13a, 13b are arranged so as to intersect at an angle of 60 ° or less from the vertical with respect to the tip sides of the pieces 13a, 13b.

In the cooling module of the first embodiment configured as described above, the heat of the heat-generating component 18 is transmitted from the thermal interface 17 to the heat pipe 15.
The heat pipe 15 vaporizes the liquid inside by heat on the heat receiving side, sends the gas to the radiating fin joint side, returns the gas to the liquid by releasing the heat to the radiating fin 13 and the main body 7, and converts the liquid into a capillary. The heat is transmitted to the heat receiving fin 13 through a series of operations. The radiating fins 13 that receive the heat receive heat at the tip sides of the two pieces 13a and 13b, that is, at the center, so that the heat is transmitted to the tips of the radiating fins 13 and the fan 11 causes the radiating fins 13 to move. The heat exchange effect can be obtained effectively by forced cooling. Therefore, even for a heat-generating component such as a CPU that handles a high frequency and generates heat at a high temperature for image processing or the like, the temperature can be significantly reduced to prevent thermal destruction, and the cooling module can be downsized. Can be realized.

In the cooling module of the first embodiment, since the heat pipe 15 is pinched so as to bite at the tip sides of the two pieces 13a and 13b forming the radiation fins 13, the heat pipe 15 is also compressed. Heat pipe 15 on the side
Is provided, the heat can be effectively transmitted from the outer periphery of the heat pipe 15 to the heat radiating fins 13, and the heat pipe 15 can be easily assembled to the heat radiating fins 13. Can be stabilized. In addition, heat pipe 15
Are arranged so as to intersect the tip sides of the pieces 13a and 13b forming the heat radiation fin 13 at an angle within 60 ° from the vertical, so that the outer circumference of the heat pipe 15 is
Since it effectively contacts the tip side of b, heat conduction to the radiation fins 13 of the heat pipe 15 can be further improved. Then, the cooling module body 7 and the lid plate 12
Is made by die-casting, and the heat radiation fins 13 are integrally formed. Since the heat radiation fins 13 are not assembled, the production is extremely easy.

(Embodiment 2) FIG. 6 is a perspective view of a radiation fin portion of a cooling module according to Embodiment 2 of the present invention.

In the cooling module of the second embodiment, as shown in FIG. 6, a heat radiating fin 20 is formed by sheet metal, and a heat pipe 15 is press-fitted into a heat pipe insertion hole 21 formed at the center thereof. are doing. The heat pipe insertion hole 21 of the heat radiation fin 20 made of sheet metal has a diameter smaller than the outer diameter of the heat pipe 15, and has a plurality of cuts 22 formed at the hole edge, and the heat pipe 15 is inserted into the heat pipe insertion hole 21. In the press-fit state, the spring piece formed by the plurality of cuts 22 at the hole edge forms the heat pipe 1.
5, the heat pipe 15 is thermally connected to the center of the radiating fin 20. The other configuration is the same as that of the first embodiment, and the description thereof is omitted.

Although not shown in the drawings, if there is a gap at the junction between the radiating fin and the heat pipe, a heat conductive silicon grease or solder is interposed at the junction between the radiating fin and the heat pipe to form a heat sink. The pipe may be thermally connected to the radiating fins, and heat can be effectively transmitted from the outer periphery of the heat pipe to the radiating fins as in the above embodiments. In each of the above embodiments, the radiation fins are bent at substantially right angles. However, this is a matter of design, and the radiation fins may be provided in a straight line. Absent.

[0028]

As is clear from the above description, the CPU
Heat from the heat pipe, which has received heat from the heat-generating components such as the CPU, is transmitted to the tip of the heat-radiating fins, and the heat-radiating fins can be effectively forcibly cooled by the fan. However, the temperature can be greatly reduced to prevent thermal destruction, and the cooling module can be downsized. The effect is large.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cooling module according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the inside of the main body of the cooling module.

FIG. 3 is a perspective view showing the inside of a lid plate of the cooling module.

FIG. 4 is a perspective view of a radiation fin portion of the cooling module.

FIG. 5 is a sectional view of a radiation fin portion of the cooling module.

FIG. 6 is a perspective view of a radiation fin portion of the cooling module according to the second embodiment of the present invention.

FIG. 7 is a perspective view of another conventional cooling module.

FIG. 8 is a perspective view of another conventional cooling module.

FIG. 9 is a perspective view showing the back surface of the cooling module of FIG. 8;

FIG. 10 is a sectional view of a heat pipe joint of the cooling module.

FIG. 11 is a sectional view of a heat pipe in the cooling module.

[Explanation of symbols]

 7 Body 8 Fan Room 9 Heat Exchange Room 10 Air Suction Port 11 Fan 12 Cover Plate 13 Radiation Fin 13a Piece 13b Piece 13c Depression 14 Air Outlet 15 Heat Pipe 16 Seat Plate for Mounting Heating Parts 17 Thermal Interface Section 18 Heating Parts 19 Groove 20 Heat radiating fin 21 Heat pipe insertion hole 22 Notch

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H01L 23/467 H05K 7/20 H H05K 7/20 H01L 23/46 BC

Claims (9)

[Claims] 1. An external thermal interface section has a CP.
A metal having good heat conductivity provided with a heat pipe joined to a heat generating component such as U, a fan and a plurality of radiating fins cooled by the fan inside the main body, and a heat pipe connected to the thermal interface portion so as to be heat-exchangeable. A cooling module comprising: a heat pipe that guides the heat pipe into a main body and is thermally connected to a center portion of the radiation fin. 2. Each of the radiating fins is provided on the inner side of the main body and on the inner side of the cover plate, and is constituted by two pieces whose tip sides are opposed to each other, and the heat pipe is pressed by the tip sides of the two pieces. 2. The cooling module according to claim 1, wherein the cooling module is thermally connected to a center portion of the radiating fin. 3. The cooling module according to claim 2, wherein the two pieces constituting the heat radiation fin have a recess at a tip side for pressing the heat pipe so that the heat pipe fits. 4. The cooling module according to claim 2, wherein the two pieces constituting the radiation fin are provided such that a distance between the tip sides is smaller than an outer diameter of the heat pipe. 5. The cooling module according to claim 1, wherein the heat radiating fin is thermally connected to the heat pipe via heat conductive silicon grease or solder. 6. The cooling module according to claim 1, wherein the heat pipe is arranged so as to intersect the tip side of the radiation fin at an angle within 60 ° from the vertical. 7. The cooling module according to claim 1, wherein the main body and the cover plate are made of die-cast, and the radiation fins are formed integrally. 8. The cooling module according to claim 1, wherein the radiation fin is formed of a sheet metal. 9. An external thermal interface section having a CP
A heat conductive member having a heat pipe joined to heat generating parts such as U, provided with a fan and a plurality of sheet metal radiating fins cooled by the fan inside the main body, and connected to the thermal interface part so as to be able to exchange heat. Cooling module made of good metal, the radiating fin made of sheet metal has a diameter smaller than the outer diameter of the heat pipe in the center, and has a heat pipe insertion hole formed with a plurality of cuts in the hole edge, A cooling module, wherein a heat pipe is press-fitted into the heat pipe insertion hole and the heat pipe is thermally connected to a center portion of the radiation fin.