JPH06120384A - Heat transport device - Google Patents

Abstract

PURPOSE:To provide a heat transport device capable of efficiently transfer heat generated at a heating member to a radiation member located at an arbitrary place without being governed by arrangement situation of the members even though the heat member is mounted in a narrow space together with other members. CONSTITUTION:Flat headers 1 and 2 are connected with a plurality of flexible tubes 3 and the inside is filled with a liquid. Fins 50 and 51 are provided inside respective headers 1 and 2, and heat is transferred efficiently from a header wall to the liquid inside. Bellows 60 and 61 and a drive mechanism are provided in the header 1. The belows 60 and 61 are expanded and contracted by the drive mechanism, and the volumetric changes created by them give reciprocating motions to the liquid 4 between the headers 1 and 2 through the flexible tubes 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for an electronic device, and more particularly to a cooling device for an electronic circuit board which cools a semiconductor element to maintain a predetermined temperature.

[0002]

2. Description of the Related Art A conventional electronic device is disclosed in JP-A-1-84699,
As described in Japanese Patent Laid-Open No. 2-244748, a heat pipe is brought into contact with a heat generating member, and the heat generated by the heat generating member is radiated by the heat radiating member. Further, as described in US Pat. No. 4,590,933, container parts are provided at both ends of a large number of ducts, and the liquid enclosed therein is vibrated by a vibrating mechanism to transfer heat between the containers.

[0003]

[Patent Document 1] Japanese Unexamined Patent Publication No.
In the example of the −244748 publication, the flexibility of the heat pipe itself cannot be obtained, and in a device in which the heat generating member is mounted in a narrow space together with other members, when the heat generating member and the heat radiating member are connected by the heat pipe, It is necessary to greatly change the installation location of the other members and to change the installation location of the heat generating member and the like. Also, U.S. Pat.
In the case of No. 993 as well, the duct structure between the two containers severely limited the arrangement of members within the equipment. on the other hand,
In the example of Japanese Patent Laid-Open No. 1-84699, there is a problem that the operation limit of the heat transport amount is low when a thin tube heat pipe is used to obtain flexibility. For this reason, there is a problem that flexibility is lost even if a plurality of wires are used to increase the heat transport amount.

An object of the present invention is to provide a device in which a heat-generating member is mounted together with other members in a narrow space, and the heat generated by the heat-generating member can be applied to an arbitrary place regardless of the arrangement state of the members. Another object of the present invention is to provide a heat transport device that efficiently transports the heat radiating member installed.

[0005]

In order to achieve the above object, the heat transport device of the present invention includes a flexible tube having a flat header member having fins therein, which is in contact with each of the heat generating member and the heat radiating member. A liquid drive mechanism is provided to oscillate or circulate the liquid, which is connected inside the header, by a liquid drive mechanism.

[0006]

In the heat transport device, since the flexible tube is used to connect the header in contact with each of the heat generating member and the heat radiating member, even if the heat radiating member is installed in a limited place due to space limitations, Regardless of the arrangement of members other than the heat generating member, they can be avoided and connected. The heat generating member and the header are thermally directly connected, and the fins provided in the header efficiently transfer heat to the liquid in the header. Since the liquid vibrates or circulates between the headers, the liquid efficiently transfers heat from the header connected to the heat generating member to the header connected to the heat radiating member. Similarly, since the header on the heat dissipation member side is also thermally connected directly to the heat dissipation member, the transported heat is efficiently dissipated. Therefore, even in a device in which the heat generating member is mounted in a narrow space together with other members, the heat generated by the heat generating member can be efficiently transferred to a heat radiating member installed at an arbitrary location regardless of the arrangement of the members. It can be transported well and the heat generating member is cooled.

[0007]

EXAMPLE FIG. 1 shows an example of the present invention. The flat headers 1 and 2 are connected by a plurality of flexible tubes 3, and a liquid 4, for example, water is sealed inside. Fins 50 and 51 are provided inside the headers 1 and 2, respectively, so that heat is efficiently transferred from the header wall to the liquid inside.
The headers 1 and 2 are thermally connected to the heat radiation member and the heat generation member by means such as contact. The size of the header can be arbitrarily set according to the sizes of the heat generating member and the heat radiating member. In one header 1, the liquid sealing portion is divided into two chambers, and bellows 60 and 61 are provided respectively.
A drive mechanism is attached to one of the bellows 60. The bellows 60 expands and contracts by the drive mechanism, and the volume change is
The bellows 61 in the header 1 is expanded and contracted through the flexible tube 3, the header 2 and the flexible tube 30. As a result, the liquid 4 reciprocates between the header 1 and the header 2. Here, the inside of the header 2 is also divided into two regions corresponding to the divided regions inside the header 1 and connected by a flexible tube, but in the header 2, each of the two regions circulates inside the header. For example, the drive mechanism may be configured such that the support portion 70 fixed to the bellows is attached to the rotating shaft 71 while being displaced from the central axis, and the rotating shaft 71 is rotated by the motor 72 to reciprocate the bellows supporting portion 70. Alternatively, a cam member may be used instead of the rotating shaft, and the cam member may be rotated to directly expand and contract the bellows. The drive mechanism may be provided outside the header.
According to the present embodiment, even if the heat generating member is mounted in a narrow space together with other members and the arrangement positions of the heat generating member and the heat radiating member are limited, one of the headers, for example, the header 2 is used as the heat generating member. By bringing the other header 1 into contact with the heat dissipating member, the heat generated in the heat generating member can be efficiently transported to the heat dissipating member without being affected by the arrangement of the members, and the heat generating member is cooled.

FIG. 2 shows another embodiment. With a configuration similar to that of the embodiment shown in FIG. 1, flat headers 1 and 2 are connected by two flexible tubes 3 and 30, and a liquid 4, for example, water is sealed inside. Fins 50 and 51 are provided inside the headers 1 and 2,
Heat is efficiently transferred to the liquid inside from the header wall. The headers 1 and 2 are thermally connected to the heat radiation member and the heat generation member by means such as contact. The size of the header can be arbitrarily set according to the sizes of the heat generating member and the heat radiating member. Each of the headers 1 and 2 has a liquid sealing portion divided into two chambers, and check valves 80 and 81 are provided respectively. One header 1 is a bellows 60 for each of the two rooms,
61 is provided, and a drive mechanism is attached to one of the bellows 60. When the bellows 60 contracts due to the drive mechanism, the check valve 80 is closed, the check valve 81 of the header 2 is opened, and the bellows 61 of the header 1 is extended due to an increase in pressure due to a decrease in volume. At this time, the liquid in the header 1 corresponds to the volume change of the bellows.
It flows through the flexible tube 3, the header 2 and the flexible tube 31. Further, when the bellows 60 extends, the pressure decrease causes the check valves 80 and 81 to operate in reverse, and the bellows 61 contracts, so that the liquid moves in the header 1. By repeating this process, the liquid expands due to the expansion and contraction of the bellows.
Cycle between two. As the drive mechanism, the mechanism shown in FIG. 1 can be used. It may also be provided outside the header. As a result, the heat generating member is brought into contact with one of the headers, and the heat transferred to the liquid through the fins moves to the other header due to the circulation of the liquid. Therefore, heat can be effectively dissipated by attaching the heat dissipating member to the other header. Since the headers are connected by the flexible tube, the heat generated in the heat generating member can be efficiently transported to the heat radiating member without being affected by the arrangement state of the members, and the heat generating member is cooled.

Another embodiment is shown in FIG. The flat headers 1 and 2 are connected by two flexible tubes 3 and 30, and the liquid 4 is enclosed inside. A small pump 7 is built in one of the headers 1 and liquid is circulated between the headers. Fins 50 and 51 are inside the header
Is provided to form an enlarged flow path and to promote heat exchange between the header wall and the liquid. Heat can be effectively dissipated by bringing the heat generating member and the heat dissipating member into contact with the header. Since the headers are connected by the flexible tube, the heat generated by the heat generating member can be efficiently transported to the heat radiating member without being affected by the arrangement of the members, and the heat generating member is cooled.

FIG. 4 shows another embodiment. This embodiment has the same structure as the embodiment shown in FIGS. 1 to 3, and the header wall on the heat dissipation side is formed integrally with the heat dissipation fin 8. Each header is provided with fins 50 and 51 for promoting heat transfer from the heat generating member 11 to the liquid 4 inside the header 1 and heat transfer from the liquid 4 to the radiator 8. Further, a liquid driving mechanism 73 is provided in the header, and liquid is driven between the headers through the flexible tube 3. The liquid may be driven between the headers by the reciprocating vibration shown in FIG. 1 or the circulation shown in FIG. According to this embodiment, since the radiator 8 and the header wall are integrated, contact heat resistance from the header to the radiator is eliminated, and effective heat radiation can be performed.

FIG. 5 shows another embodiment. In this embodiment,
A plurality of headers 2a, 2b, 2c are connected to the common header 1 by a flexible tube 3, and the header 2
The a, 2b and 2c are connected to a heat generating member, and the header 1 is connected to a heat radiating member. The number of headers connected to the heat generating members is increased or decreased according to the number of heat generating members. Each of the headers has a structure similar to that of the above-described embodiments, and a driving mechanism is incorporated in the header 1 to drive the headers 2a, 2b, 2c simultaneously with the liquid, or the headers 2a, 2b, 2c. A drive mechanism may be incorporated in each of the above. According to this embodiment, even if a plurality of heat generating members are scattered in a narrow space, each heat generating member can be cooled simultaneously by one heat radiating member.

Another embodiment of the present invention is shown in FIG. This embodiment has the same structure as the embodiment shown in FIG. 1, and has flat headers 1 and 2, a flexible tube 3, a fin 50,
51, a bellows 60, liquid drive mechanisms 70, 71, 72 and the like, in which the liquid 4 is enclosed. At least one wall of the header 2 is used as the flexible film 90, and the flexible film 90 absorbs the volume change of the bellows 60 for driving the liquid. Therefore, the bellows for absorbing the volume change are not required, and the structure can be simplified.

FIG. 7 shows another embodiment according to FIG. Figure 7
Then, further, the flexible films 91 and 92 are used for both the headers 1 and 2, and the liquid 4 is driven by the liquid drive mechanisms 74 and 75.
Oscillate back and forth. At this time, the liquid drive mechanisms 74 and 75 are
Due to the amplitudes of the opposite phases, the flexible film 91,
The liquid 92 inside is driven to reciprocally vibrate. In FIG. 7, the case where the drive mechanism is provided in each header is shown, but the drive mechanism is made to follow one of the films according to the expansion and contraction of the drive mechanism by means of adhesion or the like. Can be one.

FIG. 8 shows an embodiment in which the present invention is applied to an electronic device. The electronic device includes a wiring board 21 having a plurality of semiconductor elements, a keyboard 22, a disk device 23,
The display device 24 and the like are included. Among the semiconductor elements mounted on the wiring board 21, the semiconductor element 25 having a particularly large heat generation amount
The header 2 is connected to. The semiconductor element 25 and the header 2 are brought into contact with each other with a thermal compound or a high thermal conductive silicone rubber 26 sandwiched therebetween to efficiently transfer the heat generated in the semiconductor element 25 to the header 2. Further, the header 2 connected to the semiconductor element 25 has a flexible tube 3
Is connected to the header 1 attached to the back surface of the display device 24. Liquid is sealed in the headers 1 and 2, and the liquid is driven between the headers by a liquid driving mechanism provided inside or outside the header 1. The liquid is driven by reciprocating vibration between headers or circulation. Since the large area on the back surface of the display device 24 can be used for the heat dissipation side header 1, effective heat dissipation can be achieved even by natural heat dissipation. Further, since the headers are connected by the flexible tube, even if a large number of components are mounted in a narrow housing, the high heat generating semiconductor element and the heat radiating portion can be easily thermally connected. The semiconductor element can be cooled efficiently without being affected by the above.

FIG. 9 shows another embodiment in which the present invention is applied to an electronic device. The electronic device includes a wiring board 21 having a plurality of semiconductor elements, a keyboard 22, a disk device 2
3, a display device 24 and the like. Among the semiconductor elements mounted on the wiring board 21, the header 2 is connected to the semiconductor element 25 that generates a particularly large amount of heat. The semiconductor element 25 and the header 2 are brought into contact with each other with a thermal compound or a high thermal conductive silicone rubber 26 sandwiched therebetween to efficiently transfer the heat generated in the semiconductor element 25 to the header 2. Further, the header 2 connected to the semiconductor element 25 is connected by the flexible tube 3 to the header 1 attached to the radiation fin 27 provided on the rear part of the housing. The heat radiation fin 27 and the header 1 may have an integrated structure. Liquid is sealed in the headers 1 and 2, and the liquid is driven between the headers by a liquid driving mechanism provided inside or outside the header 1. The liquid is driven by reciprocating vibration between headers or circulation. The heat radiation fin 27 is cooled by the fan 28, and high heat radiation performance is obtained. According to the present invention, even if the radiating fins 27 are installed in a limited space in the housing, the headers can be arbitrarily connected to each other by avoiding other members by the flexible tube. It is possible to easily and thermally connect the high heat generating semiconductor element and the heat radiation fin without being damaged. Therefore, the semiconductor element can be cooled efficiently.

[0016]

According to the present invention, even in a device in which a heat generating member is mounted in a narrow space together with other members, the heat generated by the heat generating member is not affected by the arrangement of the members. The heat dissipating member can be efficiently transported to the heat dissipating member installed in the place, and the heat generating member can be efficiently cooled.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a second embodiment of the present invention.

FIG. 3 is a sectional view of a third embodiment of the present invention.

FIG. 4 is a sectional view of a fourth embodiment of the present invention.

FIG. 5 is an explanatory diagram of a fifth embodiment of the present invention.

FIG. 6 is a perspective view of a sixth embodiment of the present invention.

FIG. 7 is a sectional view of a seventh embodiment of the present invention.

FIG. 8 is a perspective view of an eighth embodiment of the present invention.

FIG. 9 is a perspective view of a ninth embodiment of the present invention.

[Explanation of symbols]

1, 2 ... Header, 3 ... Flexible tube, 4 ... Cooling liquid, 50, 51 ... Fins, 60, 61 ... Bellows.

Claims (1)

[Claims] 1. A device for cooling a heat-generating member by means of bringing the heat-generating member and the heat-dissipating member into contact with each other and transporting heat generated in the heat-generating member to the heat-dissipating member. Characterized by having a plurality of flat-shaped headers and a plurality of flexible tubes, connecting the plurality of headers with the flexible tube, enclosing a liquid inside, and driving the liquid between the headers. Heat transport device.