JP2001237582A - Heat sink, cooling device using it, and electronic apparatus comprising it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin and light-weight heat sink used for a portable electronic apparatus. SOLUTION: A heat-resistant and heat-conductive flexible sheet 11 constitutes a flat bag 12, on which a plurality of partition parts 13, almost parallel to an outer perimeter part, are provided inward from the outer perimeter part to form a coolant path 14. A coolant inlet 15 is provided, in at least one point of the outer perimeter part, which protrudes in the direction parallel to that flat surface of the bag 12, while a coolant outlet 16 is provided, in at least one point of the outer perimeter part, which protrudes in the direction parallel to the flat surface of the bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiator used for portable electronic equipment such as a notebook personal computer (hereinafter referred to as a notebook personal computer), a cooling device using the same, and an electronic device equipped with the cooling device. It concerns equipment.

[0002]

2. Description of the Related Art A conventional radiator will be described with reference to the drawings, taking a radiator used in a notebook personal computer as an example.

FIG. 27 is an external perspective view of a notebook personal computer showing a radiator without a conventional keyboard input unit.

As shown in FIG. 1, reference numeral 1 denotes a main body of a notebook personal computer. A keyboard input section (not shown) is provided on an upper surface, and an electronic circuit 2 for controlling the notebook personal computer is housed inside the main body 1. An opening / closing lid 4 having a display unit 3 is mounted on an upper surface of the main body 1.

[0005] Inside the main body 1, a metal plate 7 is provided via a heat transfer rubber 6 on the surface of a heating element 5 which is a heat source such as a CPU constituting the electronic circuit 2. A heat pipe 8 is provided from one end near the body 5 to the other end.

A fan 9 is provided at the other end of the metal plate 7.

According to this configuration, the heat of the heating element 5 is absorbed by the heat transfer rubber 6, and the working fluid in the heat pipe 8 near one end of the metal plate 7 is heated and vaporized by the heat transfer rubber 6. ,
The heat moves inside the heat pipe 8 to the other end of the metal plate 7, and the other end of the metal plate 7 functions as a radiator to radiate heat to the keyboard input unit, liquefy again, and liquefy again. To the heating element 5 side.

Further, the heat of the metal plate 7 is forcibly air-cooled by the fan 9 and released to the outside.

[0009]

However, in the above-mentioned conventional radiator, the heat from the heat generator 5 is radiated by using the metal plate 7 provided with the heat pipe 8 and serving as a radiator made of an aluminum plate. In addition, since the metal plate 7 is made of a rigid aluminum plate, there is a limitation in installation on an electronic device such as a notebook computer, and there is a problem that it is difficult to use the electronic device which is required to be small, thin, and lightweight. there were.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a thin and lightweight radiator, a cooling device using the radiator, and an electronic device provided with the cooling device.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a flat bag made of a flexible sheet having high heat resistance and good heat conductivity. It has a refrigerant passage formed by providing a plurality of partitions substantially parallel to the outer peripheral portion on the inner side, and has a refrigerant inlet projecting in a direction parallel to the planar surface of the bag at at least one position of the outer peripheral portion. And a refrigerant outlet protruding in a direction parallel to the planar surface of the bag body at at least one position of the outer peripheral portion.

Thus, a thin and light radiator, a cooling device using the same, and an electronic device equipped with the cooling device can be provided.

[0013]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a flat bag is formed from a flexible sheet having high heat resistance and good heat conductivity, and is formed inside the outer periphery of the bag. A refrigerant passage formed by providing a plurality of partitions substantially parallel to the outer peripheral portion is provided, and a refrigerant inlet projecting in a direction parallel to the planar surface of the bag body is provided at at least one position of the outer peripheral portion, A heat radiator having a refrigerant outlet protruding in a direction parallel to the planar surface of the bag body at at least one position of the outer peripheral portion, and allowing the refrigerant to flow from the refrigerant inlet to the refrigerant outlet in the heat radiator. In this way, the refrigerant can flow uniformly throughout the inside of the heat radiator, the uniform heat distribution on the entire surface of the heat radiator can be achieved, and the heat radiation performance can be improved. By making it parallel, the radiator can be placed in small gaps in thin equipment. Wearing and easy, with the effect that attained reduction of the thickness of the device.

According to a second aspect of the present invention, in the first aspect of the present invention, the flexible sheet forming the bag body has a laminated structure and at least one layer is made of a gas-permeable material. In addition, it has the effect of suppressing the release of the vaporized component of the refrigerant flowing through the refrigerant passage to the outside, preventing the decrease of the refrigerant and the change of the mixing component ratio, and providing a highly reliable radiator.

According to a third aspect of the present invention, in the first aspect of the present invention, the flexible sheet forming the bag has a laminated structure and at least one layer is made of a material that is non-chemically reactive with the refrigerant. This has the effect of preventing a chemical change and alteration of the refrigerant contact surface inside the radiator and preventing a chemical change and alteration of the refrigerant, thereby providing a highly reliable radiator.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the flexible sheet forming the bag body has a laminated structure, and at least one layer serving as the innermost surface is made of a thermo-flexible resin. In the process of manufacturing a heat radiator from a flexible sheet as a raw material, a thermoplastic resin material is opposed to the outer peripheral portion of the heat radiator, and each surface of the partition portion is heated and fused, With reliable bonding, no adhesives or partitioning materials are required, and the number of processes is small.
This has the effect that the radiator can be manufactured at low cost.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the partition portion is formed by linearly bonding opposing surfaces of a flexible sheet forming a bag body, By reducing the area occupied by the partition portion, it is possible to increase the area of the refrigerant passage in the planar surface of the heat radiator, which has the effect of improving the heat radiation performance.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the flexible sheet forming the bag has a laminated structure and at least one layer is made of an elastic material. This has the effect of reducing scratches and breakage due to external force on the surface of the heat radiator when the heat radiator is manufactured and assembled to equipment.

According to a seventh aspect of the present invention, in the first aspect of the invention, the outermost peripheral portion of the refrigerant passage formed in the bag is provided along substantially the entire outer peripheral portion of the radiator. When the refrigerant is filled in the outermost peripheral portion of the refrigerant passage, a tunnel-like structure is formed on the outer peripheral portion of the radiator by the refrigerant and the flexible sheet, so that the surface rigidity of the bag body can be increased, and This has the function of making it difficult to deform inside, and of making it easy to handle the heat dissipating body when assembling it to equipment.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the partition portion is formed so that the refrigerant passage formed in the bag body is folded in a zigzag shape along one side of the outer peripheral portion of the bag body. It is provided to increase the longitudinal bending strength of the side along one side of the outer peripheral portion to facilitate handling at the time of assembling to equipment, to make it difficult to block the refrigerant passage, and to reduce the side along the one side. In the direction perpendicular to the direction, it is easy to bend, so that the device can be easily attached to a curved surface of the device, and the degree of freedom of attachment to the device is increased.

According to a ninth aspect of the present invention, in the first aspect of the invention, the refrigerant passage formed in the bag is provided with a partition so as to be substantially spiral. Because it is formed continuously without deviation to the sides of the part, the deviation of the surface strength with respect to the bending of the planar bag is small, and the refrigerant passage is not easily blocked even in bending in all directions,
It is easy to handle and has the effect of increasing reliability.

According to a tenth aspect of the present invention, in the first aspect of the invention, a partition portion is provided so that a plurality of refrigerant passages are arranged in parallel, and both ends of the plurality of refrigerant passages are arranged in parallel. Even if the pipe width of one refrigerant passage is set to be small, the flow resistance to the refrigerant can be suppressed low, the heat radiation performance can be improved, and the surface of the bag body is divided by a plurality of partitions. The rigidity can be increased, the swelling of the bag due to the refrigerant pressure can be suppressed, and the radiator can be used with a predetermined thickness.

According to an eleventh aspect of the present invention, in the first aspect of the present invention, the outer peripheral portion of the flexible sheet forming the bag is folded at a predetermined width along the shape of the outer peripheral portion. By increasing the strength of the outer periphery against bending and pulling, the overall strength of the bag body increases, the surface rigidity of the bag body increases, it is difficult to deform, and when assembling to equipment, it is easy to handle with a heat radiator Has the effect of being able to

According to a twelfth aspect of the present invention, in the first aspect of the present invention, the flexible sheet forming the flat bag has a laminated structure, and one layer on one side and the other side is formed. When the refrigerant passage expands due to the internal pressure caused by injecting or flowing the refrigerant into the refrigerant passage, a flat surface of the flexible sheet of the radiator on the less flexible side is used. By mounting this surface so as to be in contact with the mounting surface of the device, the contact area with the device can be increased, and a heat radiator having high heat radiation performance can be configured.

According to a thirteenth aspect of the present invention, in the first aspect of the present invention, the refrigerant passage is formed by embossing in a tunnel shape in one direction of the flat bag body, and is provided on the other surface side. The unevenness of the surface can be reduced to secure the refrigerant passage, and by attaching this surface so as to be in contact with the mounting surface of the equipment, the contact area with the equipment can be increased and the heat radiation with high heat dissipation performance can be achieved. Has the effect of being able to compose the body.

According to a fourteenth aspect of the present invention, in the first aspect of the present invention, a plurality of dot-shaped adhesive portions or strip-shaped adhesive portions are provided after securing a flow path of the refrigerant in a refrigerant passage formed in the bag body. It is provided with a partition part, when the width of the flow path in the bag body is widened, the overall length is shortened, and the flow resistance of the refrigerant flowing through the flow path is reduced, the flow path is increased by the internal pressure of the refrigerant. The swelling can be prevented by a plurality of dot-shaped adhesive portions or strip-shaped partition portions, and has an effect that a radiator having a small thickness and low flow resistance can be formed.

According to a fifteenth aspect of the present invention, in the first aspect of the present invention, a bending member having flexibility is provided in the refrigerant passage formed in the bag body while securing a refrigerant flow path. Yes, when the bag is folded inside the equipment,
In the case of repeatedly bending and using, by providing a bending member at a corresponding portion, there is an effect that blockage of the flow path can be prevented.

According to a sixteenth aspect of the present invention, in the first aspect of the present invention, the flat bag is formed in a bellows shape in a thickness direction. Thus, heat can be efficiently dissipated with a limited volume, and the bellows shape of an arbitrary shape can be processed relatively easily, so that a highly flexible design corresponding to the individual shape of the device can be achieved.

According to a seventeenth aspect of the present invention, there is provided a radiator according to the first aspect, a heat absorbing portion having one end connected to a refrigerant inlet of the heat radiating member, and one end connected to the other end of the heat absorbing portion. The end is composed of a refrigerant circulation pump connected to the refrigerant outlet of the radiator. The parts are connected by a tubular connecting member to form a closed circuit, and the closed circuit is filled with refrigerant. The radiator can be attached to any place of the equipment without restriction with respect to the position of the heat source, and the heat dissipation can be achieved by making the refrigerant inlet and outlet of the radiator parallel to the planar surface. The body can be attached to the narrow part of the equipment, the equipment can be made thinner, and the refrigerant can be evenly distributed inside the radiator, so that the entire surface of the radiator can be evenly heated and the heat dissipation performance can be improved. It has the effect that it can be set as a high cooling device.

According to an eighteenth aspect of the present invention, in the invention according to the seventeenth aspect, the tubular connecting member connected to at least one of the heat absorbing portion and the coolant circulation pump is formed by extending a part of the bag body of the radiator. 18. A semiconductor device according to claim 17,
In addition to the operation according to the invention, the tubular connecting member is formed integrally with the bag body, so that the number of parts can be reduced, and the number of connecting parts between the parts can be reduced, so that an inexpensive and highly reliable cooling device can be configured. Has an action.

According to a nineteenth aspect of the present invention, in the invention of the seventeenth aspect, at least one of the heat absorbing portion and the refrigerant circulation pump is provided at a position on the outer peripheral portion or a part of the inside of the radiator for radiation. It is arranged so as to be connected to the refrigerant passage, so that at least one tubular connecting member can be omitted to reduce the number of parts, and the number of connecting parts between the parts can be reduced, so that an inexpensive and highly reliable cooling device can be configured. Has an action.

According to a twentieth aspect of the present invention, in the invention according to the seventeenth aspect, a part of the surface of the refrigerant passage of the radiator is a second heat absorbing portion that comes into contact with a heat source. In addition to the heat absorbing part provided in the above, a part of the heat radiator is also used as the second heat absorbing part, so that the number of parts and connecting points can be reduced and the heat absorbing part can be configured in multiple places, supporting cooling of multiple heat sources. Has a function of being able to configure the cooling device to be inexpensive and highly reliable.

According to a twenty-first aspect of the present invention, in the seventeenth aspect, a part of the surface of the refrigerant passage of the radiator is a second heat absorbing portion that contacts a heat source. In the inside of the refrigerant passage at the point, a concave groove parallel to the flow of the refrigerant is provided on the upper surface, and a flat heat-absorbing plate made of a high thermal conductive solid material whose lower surface is located on the heat source side is arranged. Even if a part of the heat radiator is pressed against the heat source by pressing a part of the heat sink as a second heat absorbing portion from above, the refrigerant passage in the concave groove is not blocked, and the heat of the heat source is efficiently transferred to the heat absorbing plate. Since heat can be transferred well and heat can be efficiently transferred to the refrigerant flowing in parallel with the concave groove of the heat absorbing plate, there is an effect that a cooling device that is inexpensive and has high absorption and heat dissipation efficiency can be configured.

According to a twenty-second aspect of the present invention, in the twenty-first aspect, the heat absorbing plate is disposed outside the refrigerant passage, and the flat lower surface of the heat absorbing plate is brought into contact with the heat source to form the refrigerant passage. Part of the surface is arranged in the concave groove of the heat absorbing plate, and even if the heat absorbing plate is pressed against the heat source and pressed against the heat source, the refrigerant passage in the concave groove is not blocked, This has the effect that the heat of the heat source can be efficiently transferred, and a cooling device that is inexpensive and has high absorption and radiation efficiency can be configured.

According to a twenty-third aspect of the present invention, in an electronic device having a heat source, the heat absorbing portion of the cooling device according to the seventeenth aspect is arranged near the heat source, and the heat radiator is arranged at a predetermined position of the housing. The electronic device has a drive source for driving the pump for circulating the refrigerant, and the use of a cooling device having a thin and light radiator allows the performance due to the heat generated by the heat source inside the electronic device. This has the effect of preventing the electronic device from lowering and making up a thin and lightweight electronic device as a whole.

According to a twenty-fourth aspect of the present invention, in the twenty-third aspect of the present invention, there is provided a blower for forcibly air cooling at least one surface of the bag body of the radiator.
In addition to the effect of the third aspect, the amount of heat released from the heat radiator increases due to the wind generated by the blower, so that it is possible to mount components having a large amount of heat, thereby improving the performance of the electronic device. Has an action.

According to a twenty-fifth aspect of the present invention, in accordance with the twenty-third aspect of the present invention, the heat-absorbing portion and the tubular connecting member for connecting the refrigerant circulation pump and the radiator are formed as a part of the radiator bag. Is extended to form a bellows-like shape to form a bellows-like connection portion, and this bellows-like connection portion is arranged in a movable portion of the electronic device, and a plurality of portions in which the housing of the electronic device is connected via the movable portion. In the case of comprising, the heat dissipating part, the heat absorbing part and the pump are arranged in separate casings, and the bellows-like connecting part for connecting them is arranged on the movable part, and the heat dissipating part is separated from the heat source. In addition to increasing the heat dissipation effect, the tubular connecting member is integrated with the radiator and the bellows shape makes the movement of the movable part smooth, and the repeated stress on the tubular connecting member is reduced, so it is inexpensive, highly reliable, and designed. Highly flexible electronic devices can be configured It has the effect of say.

According to a twenty-sixth aspect of the present invention, in the twenty-third aspect of the present invention, the heat-absorbing part and the tubular connecting member for connecting the refrigerant circulation pump and the radiator are formed as a part of the radiator bag. And a bent portion formed by inserting a bending member having flexibility into a refrigerant passage at a predetermined portion of the extended portion is disposed on a movable portion of the electronic device, and a housing of the electronic device is provided. When the body is composed of a plurality of parts connected via the movable part, the heat radiating part, the heat absorbing part and the pump are respectively arranged in separate casings, and the bent part of the tubular connecting part connecting them is a movable part. And the heat radiating portion is separated from the heat source to enhance the heat radiating effect, and the tubular connecting member is integrated with the heat radiating body and the bent portion smoothes the movement of the movable portion. And the inside of the tube Because never closes, inexpensive, reliable, it has the effect of high electronic apparatus design freedom can be constructed.

According to a twenty-seventh aspect of the present invention, in the twenty-third aspect of the present invention, at least one of the radiator, the heat absorbing portion, the pump for circulating the refrigerant and the tubular connecting member is the radiator of the first aspect. In the cooling device, the radiator on the high temperature side is disposed in a portion of the electronic device having a high temperature tolerance according to the flow of the refrigerant, and the radiator on the low temperature side is disposed in a portion of the electronic device having a low temperature tolerance. With a plurality of heat radiators, the heat radiating effect is enhanced, and in a limited space of the electronic device, heat can be efficiently radiated by effectively utilizing the temperature distribution of the heat radiator, and a heat source is provided. This has the effect of reducing the size and performance of electronic devices.

According to a twenty-eighth aspect of the present invention, in the electronic equipment having the liquid crystal display device according to the twenty-seventh aspect, the heat radiator on the low temperature side is arranged on the opposite side of the display surface of the liquid crystal display device. This has the effect of realizing a small, high-performance electronic device that suppresses the thermal effect on the liquid crystal display device.

According to a twenty-ninth aspect of the present invention, in the twenty-seventh aspect, the plurality of radiators are the radiator of the first aspect, and a connecting portion between the radiators is formed by extending the bag. Since the tubular connecting member is integrated with the heat radiator, the number of components can be reduced and the number of connection points can be reduced, so that there is an effect of low cost and high reliability.

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

(Embodiment 1) FIG. 1 is a perspective view of a heat radiator according to Embodiment 1 of the present invention, FIG. 2 is a plan sectional view thereof, and FIG.
FIG. 2 is an enlarged side sectional view taken along line AA of FIG. 1.

In the figure, reference numeral 11 denotes a flexible sheet having high heat resistance and good thermal conductivity, which is formed by laminating flexible sheets having a plurality of characteristics described later.
The flexible sheet 11 forms a substantially square, planar bag body 12.

Reference numeral 14 denotes a refrigerant passage formed by providing a plurality of partitions 13 substantially parallel to the outer peripheral portion inside the outer peripheral portion of the bag body 12, and the outermost peripheral portion of the refrigerant passage 14 is
2 is provided along substantially the entire outer periphery, and the inner periphery of the refrigerant passage 14 is provided by a partition portion 13 so as to form a zigzag shape along one side of the outer periphery of the bag body 12.

One end of the refrigerant passage 14 is provided at at least one position on the outer peripheral portion of the bag body 12.
At one end thereof, a refrigerant inlet 15 protruding in a direction parallel to the planar surface of the bag body 12, and the other end of the refrigerant passage 14 is provided at at least one location on the outer peripheral portion of the bag body 12. By providing a refrigerant outlet 16 projecting in a direction parallel to the planar surface of the bag body 12 at the other end,
It is configured as

Next, the flexible sheet 11 forming the bag body 12 of the heat radiating body 17 is a flexible sheet having a plurality of characteristics, each of which is formed in a laminated structure by an adhesive 22. Each of the sheets will be described with reference to an enlarged sectional view showing the flexible sheet 11A on one side forming the bag body 12 of FIG.

Reference numeral 18 denotes a first sheet serving as the innermost side surface of the bag body 12, which is formed of a thermoplastic resin material. The respective surfaces of the partition portion 13 are bonded by heating and fusion.

Reference numeral 19 denotes a second sheet laminated on the upper surface of the first sheet 18, which is made of a gas-impermeable material made of at least one of a metal and an inorganic oxide.
When filling and flowing the refrigerant in the refrigerant passage 14 formed in the bag body 12, the vaporization component of the refrigerant is prevented from being released to the outside in using the refrigerant for a long time. This prevents a change in the radiator and ensures a highly reliable radiator.

Reference numeral 20 denotes a third sheet laminated on the upper surface of the first sheet 18, and a refrigerant passage 14 formed in the bag 12.
A material that does not chemically react with the refrigerant when it is charged into the radiator 17. This prevents chemical change and deterioration of the refrigerant contact surface inside the radiator 17, and also prevents chemical change and deterioration of the refrigerant, thereby improving reliability. It is intended to be a heat radiator having high performance.

Reference numeral 21 denotes a fourth sheet laminated on the upper surface of the first sheet 18 and serving as the outermost surface of the bag body 12, which is made of an elastic material. When a force is applied to the surface of the heat radiator 17 from the outside at the time of assembling, the external force is reduced, and scratches and breakage are reduced.

Although the flexible sheet 11 is formed of a flexible sheet having a plurality of characteristics as described above, the arrangement and presence / absence of lamination of each sheet are not limited thereto. Absent.

The operation of the radiator 17 configured as described above will be described. A refrigerant (not shown) is charged into a refrigerant passage 14 formed in the radiator 17 through a refrigerant inlet 15 and the outside of the radiator 17 is provided. The refrigerant heated by the cooling medium is passed through the refrigerant passage 1 of the radiator 17.
By circulating using a pump (not shown) so as to pass through the radiator 4, heat can be radiated using the entire surface of the radiator 17.

As described above, according to the present embodiment, by causing the refrigerant to flow from the refrigerant inlet 15 to the refrigerant outlet 16 in the radiator 17, the refrigerant can flow uniformly throughout the radiator 17. It is possible to improve the heat radiation performance by equalizing the temperature of the entire surface of the heat radiator 17 and to improve the refrigerant inlet 15
By providing the refrigerant outlet 16 so as to protrude in a direction parallel to the plane surface of the bag body 12, the radiator 17 can be easily mounted in a small gap portion of a thin device, and the device can be made thinner. is there.

In the above embodiment, the partition 13 of the flexible sheet 11 forming the bag 12 is formed by heating and fusing the innermost first sheet 18 made of a thermoplastic resin material. However, regarding the means for forming the partition, the bag 12
The flexible sheet 11 may be formed by bonding the opposing surfaces of the flexible sheet 11 linearly using an adhesive (not shown), and by reducing the area occupied by the partition, The area of the refrigerant passage can be increased in the planar surface of the above, and the heat radiation performance can be improved.

Further, in the above embodiment, the inner peripheral portion of the refrigerant passage 14 formed in the bag body 12 is partitioned so as to form a zigzag shape along one side of the outer peripheral portion of the bag body 12 as shown in FIG. Although provided by the portion 13, the refrigerant passage 14 is not limited to this, and as shown in FIG.
5 is provided with a partition portion 27 so that the inner peripheral portion of the refrigerant passage 26 is substantially spirally shaped.
5 is formed continuously without deviation to the side of the outer peripheral portion, the deviation of the surface strength against bending of the flat bag body 25 is small, and the refrigerant passage 26 is blocked even in bending in all directions. It is difficult to handle, easy to handle, and has high reliability.

Further, the refrigerant passage 1 formed in the bag 12
4, the refrigerant passage 29 of the bag body 28 is formed to have a wide width as shown in FIG. 6, and a plurality of parallel partitions 30 are provided in the bag body 28 such that both ends are not partitioned, so that one refrigerant passage 29 is formed.
Even if the pipe width is set to be small, the flow resistance to the refrigerant can be suppressed low, the heat radiation efficiency can be increased, and the surface rigidity of the bag body 28 can be increased by the plurality of partition portions 30, so that the refrigerant The swelling of the bag body 28 due to pressure can be suppressed, and the radiator can be used with a predetermined thickness.

Then, as shown in FIG. 7, the outer peripheral portion of the flexible sheet 11 forming the bag body 12 of the above embodiment is
A folded portion 32 having a predetermined width along the shape of the outer peripheral portion of the bag body 31
By increasing the strength of the outer peripheral portion against bending and pulling, the strength of the entire bag body 31 is increased, the surface rigidity of the bag body 31 is increased, and the bag body 31 is hardly deformed. It can be an easy radiator.

It should be noted that the flat bag body 12 of the above-described embodiment is used.
As shown in FIG. 8, the flexible sheet 11 forming one side and the other side of the flexible sheet 36 forming the bag body 35 are formed as shown in FIG.
By using materials having different flexibility for each of the layers A and 36B, when the refrigerant passage 37 expands due to the internal pressure caused by injecting or flowing the refrigerant into the refrigerant passage 37, the flexible sheet 36 of the radiator 38 The unevenness of the flat surface on the low-flexibility side is reduced, and this surface is attached so as to be in contact with the mounting surface of the device (not shown). The contact area with the heat sink 38 can be increased, and the heat dissipator 38 having higher heat dissipation performance can be formed.

A refrigerant passage 14 formed by providing a plurality of partitions 13 in the bag 12 of the above embodiment is
As shown in the figure, a tunnel-shaped embossing is performed so that the flexible sheet 42A on one side, which becomes a flat bag body 41, protrudes outward, and is thermocompression bonded or bonded to the flexible sheet 42B on the other side. As a result, if the refrigerant passage 43 is formed, the unevenness of the surface on the other side of the flexible sheet 42B can be reduced, and the refrigerant passage 43 can be secured, and this surface is used for equipment (not shown). By mounting so as to be in contact with the mounting surface, the contact area with the device can be increased more reliably, and a radiator having high heat radiation performance can be configured.

The flow path of the refrigerant in the refrigerant passage 46 formed in the bag 45 was secured in the refrigerant passage 14 formed in the bag 12 of the above embodiment, as shown in FIGS. By providing a plurality of dot-shaped adhesive portions 47 or strip-shaped partition portions (not shown) on the top, the bag body 45 is formed.
When the width of the flow path in the inside is widened, the overall length is shortened, and the flow resistance of the flow of the refrigerant in the flow path is reduced, the internal pressure of the refrigerant causes the flow path to swell greatly in the thickness direction. This can be prevented by the adhesive portion 47 or the strip-shaped partition portion, and a thin radiator having a small flow resistance can be formed.

In the refrigerant passage 14 formed in the bag body 12 of the above embodiment, as shown in FIG. 12A, a state before bending of the radiator, and FIG. 12B, a state after bending of the radiator. A bag is provided by providing a bending member 51 (for example, a coil spring, a pipe, a spacer having a groove) having flexibility after securing a flow path of the refrigerant in a refrigerant passage 50 formed in the bag body 49. In the case where the body 49 is bent and mounted in the device, or when the body 49 is repeatedly bent and used, by providing the bending member 51 in a corresponding portion, it is possible to prevent the flow path from being blocked.

The flat bag 12 of the above embodiment is used.
When a bellows-like portion 53 is formed in the thickness direction as shown in FIG. 13, the fan (not shown) forcibly ventilates the bellows-like portion 53 to efficiently radiate heat in a limited volume. Therefore, a bellows shape having an arbitrary shape can be processed relatively easily, and a design with a high degree of freedom corresponding to the individual shape of the device can be performed.

(Embodiment 2) FIG. 14 is an external perspective view of a cooling device using a radiator according to Embodiment 2 of the present invention.

As shown in the figure, the radiator described in the first embodiment is mounted on a cooling device, and a radiator 17, a heat absorbing part 62 connected to one end of the refrigerant inlet 15 of the radiator 17, One end is connected to the other end of the heat absorbing portion 62, and the other end comprises a refrigerant circulation pump 63 connected to the refrigerant outlet 16 of the heat radiator 17, and the respective portions are connected by a tubular connecting member 64. The whole is a closed circuit, and the closed circuit is filled with a refrigerant (not shown).

As described above, according to the present embodiment, the radiator 17 can be mounted at any place of the device without restriction with respect to the position of the heat source, and the refrigerant inlet 15 and the refrigerant outlet 16 of the radiator 17 can be mounted. Is parallel to the planar surface, the radiator 17 can be attached to a narrow portion of the device, the device can be made thinner, and the refrigerant can be made to flow all over the inside of the radiator 17, The entire surface of the radiator 17 is soaked,
It can be a cooling device with high heat dissipation performance.

In the above-described embodiment, the radiator 17 is connected to the heat absorbing portion 62 and the pump 63 for circulating the refrigerant by using the tubular connecting member 64. However, as shown in FIG. Heat absorbing unit 62 and pump 63 for circulating refrigerant
Is connected to the bag 7 of the radiator 70.
By extending a part of 1, the tubular connecting member 72 is formed integrally with the bag body 71, so that the number of parts can be reduced, and the number of connecting points between parts can be reduced, so that it is inexpensive and reliable. It is possible to constitute a high cooling device.

In FIG. 15, both the heat absorbing portion 62 and the pump 63 for circulating the refrigerant are connected to the bag 71.
Is connected to the heat radiator 70 by a tubular connecting member 72 formed by extending a part of the heat absorbing member. However, at least one of the heat absorbing portion 62 and the refrigerant circulation pump 63 may be connected by the tubular connecting member 72. Things.

Further, in the above embodiment, the radiator 17
The heat absorbing part 62 and the pump 63 for circulating the refrigerant are connected using the tubular connecting member 64, but the pump 63 for circulating the refrigerant is connected to the outer peripheral portion or the inner side of the radiator 74 as shown in FIG. In the position of the portion (not shown), the tubular connecting member 6 is provided by being connected to the refrigerant passage 75 for heat radiation.
In addition, the number of parts can be reduced by omitting at least one part 4 and the number of connection points between parts can be reduced, so that an inexpensive and highly reliable cooling device can be configured.

In FIG. 16, the pump 63 for circulating the refrigerant is provided in the refrigerant passage 75 on the outer periphery of the radiator 74.
However, at least one of the heat absorbing portion 62 and the coolant circulation pump 63 may be connected to a part of the outer circumference or the inside of the radiator 74.

(Embodiment 3) FIG. 17 is an external perspective view of a cooling device using a heat radiator according to a third embodiment of the present invention. The heat radiator 17 is different from that according to the second embodiment. .

That is, the second surface in which a part of the surface of the refrigerant passage 77 of the heat radiator 76 contacts the second heat generator 78 serving as a heat source.
In addition to the heat absorbing portion 62 provided outside the heat radiating member 76, a part of the heat radiating member 76 also serves as the second heat absorbing portion 79, thereby reducing the number of parts and connecting portions. The heat absorbing portion can be configured at a plurality of locations, and a cooling device corresponding to the cooling of the heating elements 5 and 78 serving as a plurality of heat sources can be configured at low cost and with high reliability.

In the above embodiment, a part of the surface of the refrigerant passage 77 of the heat radiator 76 is used as the heat source.
Although the second heat absorbing portion 79 is in contact with the second heat generating portion 78, as shown in FIGS. 18 and 19, a part of the surface of the refrigerant passage 82 of the heat dissipating member 81 is in contact with the second heat generating portion 78 serving as a heat generating source.
And a concave groove 85 </ b> A parallel to the flow of the refrigerant inside the refrigerant passage 82 at a location that is the second heat absorbing section 84.
Is provided on the upper surface, and a heat absorbing plate 85 made of a high heat conductive solid material is disposed on the side of the second heating element 78 having a flat lower surface serving as a heating source, so that the second heating element 78 serving as a heating source is provided. Even if a part of the heat radiator 81 is pressed from above at a location where the part of the heat radiator 81 is the second heat absorbing portion 84, the refrigerant passage 82 in the concave groove 85A is not blocked and the heat absorbing plate 85 Since the heat of the second heat generating element 78 can be efficiently transmitted, and can be efficiently transmitted to the refrigerant flowing in parallel with the concave groove 85A of the heat absorbing plate 85, a cooling device that is inexpensive and has high absorption and radiation efficiency can be configured. Things.

In FIGS. 18 and 19, the heat absorbing plate 85 is disposed inside the refrigerant passage 82 of the heat dissipating body 81. However, as shown in FIG. And a flat lower surface of the heat absorbing plate 87 is brought into contact with a second heat generating body 78 serving as a heat source, and a part of the surface of the refrigerant passage 89 is formed into a concave groove 87A of the heat absorbing plate 87.
The second heating element 7 serving as a heat source by being disposed inside
A part of the heat dissipating member 88 is used as a second heat absorbing portion 90 for the heat sink 8, and even if the heat absorbing plate 87 is pressed from above and pressed against the second heat generating member 78 as a heat source, the refrigerant in the concave groove 87A Passage 89
Without blocking, the heat of the second heat generating body 78 serving as a heat source can be efficiently transferred to the heat absorbing plate 87, and a cooling device that is inexpensive and has high heat absorbing and radiating efficiency can be configured.

In the above-described embodiment, the heat absorbing portion is provided at a plurality of locations to provide a cooling device corresponding to the cooling of the heating elements serving as a plurality of heat sources. , 81, 88 provided with second heat absorbing portions 79,
It is also possible to use only 84 and 90.

(Embodiment 4) An electronic device equipped with a cooling device of the present invention will be described with reference to the drawings using a notebook personal computer as an example, as in the prior art.

The same components as those of the notebook personal computer described in the section of the prior art are denoted by the same reference numerals, and
Detailed description is omitted.

FIG. 21 is an external perspective view of a notebook personal computer showing a cooling device using a radiator without a keyboard input unit according to the fourth embodiment of the present invention.

As shown in FIG.
Heat absorbing part 62 of the cooling device using the radiator described in
Is disposed near the heat generating element 5 serving as a heat source inside the main body 1 of the notebook computer, and the radiator 17 and the pump 63 for circulating the refrigerant are disposed at predetermined positions inside the housing of the main body 1 and the pump 63 A drive source (not shown) for driving the motor is built in the main body 1.

As described above, according to the present embodiment,
By incorporating a cooling device having a lightweight heat radiator 17, the heat of the heat generator 5, which is a heat source inside the notebook computer, is efficiently radiated to prevent the performance of the notebook computer from deteriorating. It can be made thin and lightweight.

The notebook personal computer of the above embodiment is provided with a blower 92 for forcibly cooling at least one surface of the bag body 12 of the heat radiator 17 as shown in FIG. By releasing the heat to the outside, the amount of heat radiation in the heat radiator 17 increases due to the wind generated by the blower 92, and it becomes possible to mount components having a large amount of heat, thereby improving the performance of the electronic device. Things.

Further, the radiator 17 of the above embodiment is
Assuming that a bellows-like portion (not shown) is formed in the thickness direction, heat can be efficiently radiated in a limited volume by forcibly ventilating the bellows-like portion by the blower 92.

(Embodiment 5) FIG. 23 is an external perspective view of a notebook personal computer showing a cooling device using a radiator without a keyboard input unit and a liquid crystal display device according to Embodiment 5 of the present invention. The arrangement of the heat radiator 17 is different from that of the fourth embodiment.

That is, the tubular connecting member for connecting the heat absorbing portion 62 and the pump 63 for circulating the refrigerant to the radiator 94 is formed in a bellows shape by extending a part of the bag body 95 of the radiator 94 to form a bellows. The bellows-like connecting portion 96 is disposed on a movable portion of the main body 1 of the notebook computer and the opening / closing lid 4 provided with a display section (not shown) on the upper surface of the main body 1 so that electronic equipment can be provided. Is composed of a plurality of parts connected via the movable part 97, the radiator 94 serving as a radiator, the heat absorbing part 62 and the pump 63, and separate casings (the open / close lid 4 and the main body 1). And a bellows-like connecting portion 96 for connecting them is arranged on the movable portion 97, and the heat dissipating body 94 is separated from the heat generating member 5 serving as a heat source, thereby increasing the heat dissipating effect. The movable portion 97 is integrated with the bellows 94 and has a bellows shape. The motion smoothly, and because the repeated stress to the tubular connecting member can be reduced, inexpensive, reliable, high electronic apparatus design flexibility is intended to be configured.

In the above embodiment, the tubular connecting member is the bellows-like connecting portion 96. However, FIGS.
As shown in FIG.
A tubular connecting member for connecting between the heat radiator 99 and the heat radiator 99
9 is formed by extending a part of the bag body 100 and inserting a bent tube 101 serving as a bending member having flexibility into a refrigerant passage at a predetermined portion of the extended portion. When the housing of the notebook computer is composed of a plurality of parts connected via the movable part 97, the heat radiator 99 serving as a heat radiating part, the heat absorbing part 62 and the pump 63 are respectively disposed. It is arranged in another housing (opening / closing lid 4 and main body 1), the bent portion 102 of the tubular connecting portion connecting them is arranged in the movable portion 97, and the heat radiator 99 is separated from the heat generator 5 as a heat source. As a result, the heat dissipation effect is enhanced, the tubular connecting member is integrated with the heat radiating body 99, the bent portion 102 smoothes the movement of the movable portion 97, and the repetitive stress on the tubular connecting member is reduced, and the bent portion becomes a bent member. bent Because never 101 inside is closed, inexpensive, reliable, high electronic apparatus design flexibility is intended to be configured.

(Embodiment 6) FIG. 26 is an external perspective view of a notebook personal computer showing a cooling device using a radiator without a keyboard input section and a liquid crystal display device according to Embodiment 6 of the present invention. The cooling device is different from that of the fourth embodiment.

That is, a plurality of radiators described in the first embodiment are provided in the cooling device, and the radiator 105 on the high-temperature side is arranged in the main body 1 which is a portion of the notebook personal computer having a high temperature tolerance according to the flow of the refrigerant. Since the heat radiator 106 on the low temperature side is disposed on the opposite side of the display surface of the liquid crystal display device (not shown) attached to the opening / closing lid 4 which is a portion of the notebook personal computer having a low allowable temperature value, The plurality of heat radiators 105 and 106 enhance the heat radiating effect, and can efficiently radiate the heat by effectively utilizing the temperature distribution of the heat radiators 105 and 106 in the limited space of the notebook computer. It is possible to suppress the influence of heat on the device and reduce the size and performance of an electronic device having a heat source.

In the above embodiment, the connecting portion between the plurality of heat radiators 105 and 106 is formed by extending the bag, so that the tubular connection member is integrated with the heat radiators 105 and 106. Since the number of parts can be reduced and the number of connection points can be reduced, the reliability can be increased at a low cost. However, a plurality of radiators 1 are formed by using a tubular connection member (not shown).
05 and 106 may be connected.

[0089]

As described above, according to the present invention, by allowing the refrigerant to flow from the refrigerant inlet to the refrigerant outlet in the radiator, the refrigerant can flow uniformly in the entire radiator.
The uniform heat dissipation of the entire surface of the heat radiator can improve the heat radiation performance, and the coolant inlet and outlet are parallel to the flat surface, so that the heat radiator can be easily installed in small gaps of thin equipment. In addition, an advantageous effect that the thickness of the device can be reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat radiator according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view of the same.

FIG. 3 is an enlarged side sectional view taken along line AA of FIG. 1;

FIG. 4 is an enlarged side cross-sectional view showing a flexible sheet on one side forming a bag body.

FIG. 5 is a cross-sectional plan view showing another refrigerant passage.

FIG. 6 is a cross-sectional plan view showing another refrigerant passage.

FIG. 7 is a side sectional view showing another heat radiator.

FIG. 8 is a side sectional view showing another heat radiator.

FIG. 9 is a side sectional view showing another heat radiator.

FIG. 10 is a cross-sectional plan view showing another refrigerant passage.

FIG. 11 is a side sectional view of the same.

FIG. 12 is an enlarged side sectional view showing a bent state of another radiator;

FIG. 13 is a perspective view showing another radiator.

FIG. 14 is an external perspective view of a cooling device using a radiator according to a second embodiment of the present invention.

FIG. 15 is an external perspective view showing another cooling device.

FIG. 16 is an external perspective view showing another cooling device.

FIG. 17 is an external perspective view of a cooling device using a radiator according to a third embodiment of the present invention.

FIG. 18 is an external perspective view showing another cooling device.

FIG. 19 is an enlarged side sectional view of the relevant part.

FIG. 20 is an external perspective view showing another cooling device.

FIG. 21 is an external perspective view of a notebook personal computer showing a cooling device using a radiator without a keyboard input unit according to a fourth embodiment of the present invention.

FIG. 22 is an external perspective view of a notebook computer showing a cooling device using another radiator.

FIG. 23 is an external perspective view of a notebook personal computer showing a cooling device using a radiator without a keyboard input unit and a liquid crystal display device according to a fifth embodiment of the present invention.

FIG. 24 is an external perspective view of a notebook computer showing a cooling device using another radiator.

FIG. 25 is an enlarged side sectional view showing a bent state of the bending member.

FIG. 26 is an external perspective view of a notebook computer showing a cooling device using a radiator without a keyboard input unit and a liquid crystal display device according to a sixth embodiment of the present invention.

FIG. 27 is an external perspective view of a notebook computer showing a radiator without a conventional keyboard input unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body of a notebook computer 4 Opening / closing lid 5,78 Heating element 11,36 Flexible sheet 11A, 36A, 42A Flexible sheet 11B, 36B, 42B on one side Flexible sheet 12,25,28 on the other side 31, 35, 41, 45, 49, 7
1,95,100 Bag body 13,27,30 Partition part 14,26,29,37,43,46,50,75,7
7, 82, 89 Refrigerant passage 15 Refrigerant inlet 16 Refrigerant outlet 17, 38, 70, 74, 76, 81, 88, 94, 9
9, 105, 106 Heat dissipator 18 First sheet 19 Second sheet 20 Third sheet 21 Fourth sheet 22 Adhesive 47 Dot-shaped adhesive part 51 Bending member 53 Bellows-like part 62 Heat absorbing part 63 Pump 64, 72 tubular connecting member 78 second heat generating body 79, 84, 90 second heat absorbing portion 85, 87 heat absorbing plate 85A, 87A concave groove 92 blower 96 bellows-like connecting portion 97 movable portion 101 bent tube 102 bent portion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takatoshi Ono 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Keiji Kaizaki 1006 Okadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Fumio Aoki 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F term (reference) 5E322 DB09 DB10 5F036 AA01 BA05 BB41 BB43

Claims (29)

[Claims] 1. A flat bag made of a flexible sheet having high heat resistance and good heat conductivity, and a plurality of partitions substantially parallel to the outer periphery provided inside the outer periphery of the bag. It has a formed refrigerant passage, and is provided with a refrigerant inlet projecting in a direction parallel to a plane surface of the bag at at least one location of the outer peripheral portion, and a planar shape of the bag at at least one location of the outer peripheral portion. A radiator having a refrigerant outlet projecting in a direction parallel to the surface. 2. The heat radiator according to claim 1, wherein the flexible sheet forming the bag has a laminated structure and at least one layer is made of a material that is difficult to transmit gas. 3. The heat radiator according to claim 1, wherein the flexible sheet forming the bag has a laminated structure and at least one layer is made of a material which is non-chemically reactive with respect to the refrigerant. 4. The heat radiator according to claim 1, wherein the flexible sheet forming the bag has a laminated structure, and at least the innermost layer is made of a thermoplastic resin material. 5. The heat radiator according to claim 1, wherein the partition portion is formed by linearly bonding opposing surfaces of a flexible sheet forming the bag body. 6. The heat radiator according to claim 1, wherein the flexible sheet forming the bag has a laminated structure and at least one layer is made of a material having elasticity. 7. The heat radiator according to claim 1, wherein the outermost peripheral portion of the refrigerant passage formed in the bag is provided along substantially the entire periphery of the outer peripheral portion of the bag. 8. The heat radiator according to claim 1, wherein a partition portion is provided so that a refrigerant passage formed in the bag body is formed in a zigzag shape along one side of an outer peripheral portion of the bag body. 9. The heat radiator according to claim 1, wherein a partition portion is provided so that a refrigerant passage formed in the bag body has a substantially spiral shape. 10. The radiator according to claim 1, wherein a partition portion is provided so that the plurality of refrigerant passages are arranged in parallel, and both ends are connected at a portion where the plurality of refrigerant passages are arranged in parallel. 11. The heat radiator according to claim 1, wherein an outer peripheral portion of the flexible sheet forming the bag is folded at a predetermined width along the shape of the outer peripheral portion. 12. The heat radiator according to claim 1, wherein the flexible sheet forming the flat bag has a laminated structure, and one of the one surface and the other surface is made of a material having different flexibility. . 13. The heat radiator according to claim 1, wherein the refrigerant passage is formed by tunnel-shaped embossing in one direction of the flat bag. 14. The heat radiator according to claim 1, wherein a plurality of dot-shaped adhesive portions or strip-shaped partition portions are provided after securing a flow path of the refrigerant in the refrigerant passage formed in the bag body. 15. The heat radiator according to claim 1, wherein a bending member having flexibility is provided in the refrigerant passage formed in the bag body. 16. The heat radiator according to claim 1, wherein the flat bag is formed in a bellows shape in a thickness direction. 17. A radiator according to claim 1, a heat absorbing portion having one end connected to a refrigerant inlet of the heating member, one end connected to the other end of the heat absorbing portion, and a refrigerant having the other end connected to the radiator. A cooling device comprising a refrigerant circulation pump connected to an outlet, wherein the components are connected by a tubular connecting member to form a closed circuit, and the closed circuit is filled with a refrigerant. 18. The cooling device according to claim 17, wherein the tubular connecting member connected to at least one of the heat absorbing portion and the refrigerant circulation pump is formed by extending a part of the bag body of the radiator. 19. A heat absorbing part and / or a refrigerant circulation pump, wherein at least one of an outer peripheral part and an inner part of the radiator is connected to a radiating refrigerant passage.
8. The cooling device according to 7. 20. The cooling device according to claim 17, wherein a part of the surface of the refrigerant passage of the radiator is a second heat absorbing portion that contacts the heat source. 21. A part of the surface of the refrigerant passage of the heat radiator is a second heat absorbing portion that is in contact with the heat source, and the inside of the refrigerant passage at the portion that is the second heat absorbing portion is parallel to the flow of the refrigerant. 18. The cooling device according to claim 17, further comprising: a heat absorbing plate made of a high heat conductive solid material, wherein the heat absorbing plate has a concave groove on an upper surface and a flat lower surface is located on a heat source side. 22. A heat absorbing plate is provided outside the refrigerant passage,
22. The cooling device according to claim 21, wherein a flat lower surface of the heat absorbing plate is brought into contact with the heat source, and a partial surface of the refrigerant passage is disposed in a concave groove of the heat absorbing plate. 23. An electronic device having a heat source, wherein a heat absorbing portion of the cooling device according to claim 17 is arranged near the heat source, a radiator is arranged at a predetermined position of the housing, and a pump for circulating a refrigerant is provided. Electronic equipment having a drive reduction for driving the. 24. The electronic apparatus according to claim 23, further comprising a blower for forcibly air-cooling at least one surface of the radiator bag. 25. A tubular connecting member for connecting between the heat absorbing portion and the pump for circulating the refrigerant and the radiator is formed in a bellows shape by extending a part of the bag body of the radiator to form a bellows-like connecting portion. ,
24. The electronic device according to claim 23, wherein the bellows-like connection portion is disposed on a movable portion of the electronic device. 26. A tubular connecting member for connecting a heat absorbing part and a pump for circulating a refrigerant to a radiator is formed by extending a part of a bag body of the radiator. 24. A bend formed by inserting a bendable member having flexibility into the passage, and disposed on a movable portion of the electronic device.
Electronic device as described. 27. A radiator of a cooling device comprising at least one of the radiator according to claim 1, a plurality of radiators, a heat absorbing portion, a pump for circulating a refrigerant, and a tubular connecting member, the radiator being on a high temperature side according to the flow of the refrigerant. 24. The electronic device according to claim 23, wherein the electronic device is disposed in a portion of the electronic device having a high temperature allowable value, and the radiator on the low temperature side is disposed in a portion of the electronic device having a low temperature allowable value. 28. The electronic device according to claim 27, wherein in the case of an electronic device provided with a liquid crystal display device, a low-temperature-side radiator is arranged on a side opposite to a display surface of the liquid crystal display device. 29. The electronic device according to claim 27, wherein the plurality of heat radiators are the heat radiator according to claim 1, and connection portions between the heat radiators are formed by extending a bag.