JPH02162754A - Network heat transfer device - Google Patents

Abstract

PURPOSE:To thermally control heat releasing equipments which are irregularly arranged so as to keep them at the same temperature by a method wherein a heat transfer element is attached to parts of high heat releasing density respectively, and the heat transfer elements are connected with each other in network keeping the insides of the above parts connected. CONSTITUTION:A heat absorbing section 11 of a heat transfer device is attached to only a part 4 of high heat releasing density inside a heat releasing equipment 2 and made to absorb heat, and two or more heat absorbing sections 11 are connected with each other. A heat transfer section 12 serving only as a path of heat transferring vapor is formed of organic material or the like, whereby it is flexible and able to easily connect the heat transfer elements with each other in network even if the equipments are dispersedly arranged, so that the heat control of the equipments can be made and the dense mounting of the equipments 2 on an equipment mounting board 1 can be attained. And, as the heat absorbed from the heat releasing equipments 2 can be transferred to the heat absorbing sections 11 of lower temperature or optional parts of the equipment mounting board, if the heat absorbing part 11 is attached to an equipment or a part which is apt to become too low in temperature, not only the equipment or the part is prevented from being over-cooled but also the whole equipment mounting board 1 can be made uniform in temperature and the heat dissipation can be realized taking advantage of the whole mounting face.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a heat transport device for transmitting heat.

(Prior Art) Fig. 4 is a diagram showing a conventional example of thermally controlling heat-generating devices such as electronic devices arranged on a board, in which 1 indicates the device is mounted on the board, 2 indicates the heat-generating device, and 3-1 3-2 is a U-shaped heat pipe for mutually connecting the linear heat vibrators 3-1, and 4 is for locally generating heat within the heat generating device 2. A high heat generation density part with a large amount, 5, is a heat sink, and the heat transport device is composed of 3-1, 3-2.

Figure 5 shows linear and U-shaped heat vibrators 3-1.3-
FIG. 2 is a diagram showing the cross-sectional shape of No. 2; The part where the temperature of the heat generating device 2 becomes extremely high is the high heat generating density part 4 which generates a large amount of heat in a small area. -1 to absorb the heat generated by contacting the linear heat vibrator 3-1.
By bonding the υ-shaped heat vibrator 3-2 with the tube wall, the temperature of all the heat generating devices 2 was made uniform. In addition, the heat generated from the equipment can be radiated by using the entire surface of the board 1 when the equipment is installed, or if the amount of heat generated by the equipment is large, a heat sink 5 is attached and each heat vibrator 3-1, 3-2 is used to radiate the heat to the heat sink 5. It was transporting heat.

(Problem to be solved by the invention) By the way, - The arrangement of equipment in boat fishing is often determined by electrical characteristics, and when arranging the required number of equipment within a certain area, the effective area From using
It becomes difficult to maintain the same orientation of the device. Therefore,
The equipment arrangement, that is, the position of the high heat generation density parts 4, is also irregular, - one heat vibrator alone cannot contact the high heat generation density parts 4 in multiple devices, and - although each heat vibrator has sufficient heat transport capacity. However, multiple heat vibrators had to be used. In addition, when connecting these linear heat vibes 3-1 and U-shaped heat vibes 3-2, the contact thermal resistance at the contact part is large, and the heat exchange between the heat vibes is not good, so each heat There was a drawback that the temperature difference between the vibrators 3-1 and 3-2 and the heat generating device 2 increased. Furthermore, since the U-shaped heat vibe 3-2 has to be manufactured by bending the linear heat vibe 3-1, the groove-shaped wick, which is the device that returns the liquid to the heat absorption part of the heat vibe, should not be crushed. It is necessary to have a large curvature. Therefore, when controlling the heat of devices that are miniaturized and packed with high density, the spacing between the linear heat pipes 3-1 must be narrowed according to the device arrangement; however, the linear heat pipes 3-1
There was a drawback that it became impossible to connect the U-shaped heat vibes 3-2 with each other, and heat exchange between the heat vibes 3-1 and 3-2 became impossible. Also, if you want to make sure that the heat vibrator comes into contact with the high heat density part 4, when installing the device, make sure that the screw position is not directly above the heat vibrator.
Another disadvantage is that the design of the case must be changed for each device to prevent contact with other devices.

The purpose of this invention is to attach heat transport elements to parts with high heat generation density when there are multiple heat generating devices, and to connect them in a network with the internal spaces connected, so that each of the irregularly arranged An object of the present invention is to provide a heat transport device that enables heat control such that heat generating devices are at the same temperature.

[Means to solve the problem]

The network heat transport device according to the present invention is a device that transports heat from a high temperature part to a low temperature part, and includes a heat absorbing part made of a high heat transfer coefficient material attached to a heat generating device, and an internal space made of a flexible material. A heat transport element is constructed by a heat transport part in which a liquid for heat transport is sealed in this space, and a condensation part made of a high heat transfer coefficient material connected to the low temperature part. They are connected so that the spaces are connected.

[Effect]

In this invention, by communicating the internal spaces of a plurality of heat transport elements, the thermal resistance within the heat transport device is reduced, and heat is efficiently transported from a high temperature section to a low temperature section.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of the present invention, in which 11 is a heat absorbing part that takes heat from the equipment, 12 is a heat transport part, and 1
3 is a condensing section where the transported steam is condensed, and 5 is a heat sink similar to that shown in FIG.

Further, FIG. 2 shows an example of the cross-sectional shape of the heat transport section 12. The liquid (not shown) accumulates in the central narrow portion 12a in FIG. 2, and returns to the heat absorption section 11, where the liquid pressure is lower than the liquid pressure at the place where it is condensed. By connecting heat transport elements in a network as shown in Figure 1, a quantity of liquid corresponding to the amount of heat generated by the device evaporates, and steam with latent heat is transferred to the lowest temperature area. Then, when the amount of steam corresponding to the temperature of the low temperature section is condensed and becomes liquid, heat is exhausted. In other words, when the heat generation amount of the device is large and the temperature is higher than other parts, the heat absorption section 11 becomes an evaporation section for the liquid sealed inside the heat transport device, and conversely, when the heat generation amount of the device is small and the temperature is low, the heat absorption section 11 becomes an evaporation section of the liquid sealed inside the heat transport device. It becomes a condensation part for the steam generated in other heat absorption parts. Therefore, heat from each heat generating device is transferred by vapor latent heat so that each device has the same temperature, so the thermal resistance between heat transport elements becomes negligibly small, and between heat transport devices and heat generating devices. The temperature difference can be made very small compared to when conventional technology is applied.

Note that the heat absorption part 11. The condensing section 13 is made of, for example, aluminum, the heat transporting section 12 is made of, for example, polyester fiber, and the liquid in the heat transporting section 12 is, for example, an ammonia solution. Of course, other materials may also be used.

FIG. 3 shows an example to which this invention is applied, and as in FIG. 4, 1 is a board for mounting equipment, 2 is a heat generating device, 4 is a high heat generation density part, 5 is a heat sink, and 11 is a heat transport device. Heat absorption part, 1
2 is a heat transport section, and 13 is a condensation section of the heat transport device.

As shown in FIG.
Attaching the heat absorption part 11 of the heat transport device only absorbs heat,
The heat transport part 12, which is a component that connects a plurality of heat absorption parts 11 and simply serves as a passage for steam that transports heat, can operate flexibly by being made of, for example, an organic material. Even if there are variations in equipment arrangement, heat transport elements can be easily connected in a network to perform thermal control, and equipment can be mounted in high density within the board 1. In addition, the amount of heat taken from the heat generating device 2 can be transported to the lower temperature heat absorbing section 11 or any position on the board 1, so if the heat absorbing section 11 is attached to a device or a place where the temperature becomes too low, At the same time, it is possible to prevent excessive cooling, and at the same time, the temperature of the entire board 1 can be made uniform by mounting the equipment, and heat dissipation can be achieved using the entire mounting surface.

〔Effect of the invention〕

As explained above, the present invention includes: a heat absorbing part made of a material with high heat transfer coefficient that is attached to a heat generating device; a heat transporting part made of a flexible material and having a space inside, and a liquid for heat transport being sealed in this space; A heat transport element is formed by a condensing part made of a high heat transfer coefficient material connected to a low temperature part, and multiple heat transport elements are connected with their internal spaces communicating, so a flexible heat transport part is formed. This makes it possible to connect heat transport elements with 200 mm in a network, and has the advantage that irregularly arranged heat generating devices can be controlled to the same temperature.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the network type heat transport device according to the present invention, FIG. 2 shows an example of the cross-sectional shape of the heat transport section of the heat transport device according to the present invention, and
4 is a plan view showing a state in which the network type transportation device of the present invention is applied to equipment, FIG. 4 is a plan view showing a conventional example of a heat control method for heat generating equipment, and FIG. It is a figure which shows an example of the cross-sectional shape of the heat vibe used for the conventional example shown. In the figure, 1 is a board for equipment mounting, 2 is a heat generating device, 3-1 is a linear heat vibrator, 3-2 is a U-shaped heat vibrator, 4 is a high heat generation density part, 5 is a heat sink, 11 is a high heat generation The heat absorption part of the heat transport device attached to the density part, 12 is the heat transport part, and 13 is the condensation part of the heat transport device. Figure 1 Figure Figure Figure Figure

Claims (1)

[Claims] A device that transports heat from a high-temperature part to a low-temperature part, and includes a heat absorbing part made of a material with high heat transfer coefficient that is attached to a heat generating device, and a space made of a flexible material, in which a liquid for heat transport is placed. A heat transport element is constituted by a heat transport part enclosing the heat transport part and a condensation part made of a high heat transfer coefficient material connected to the low temperature part, and a plurality of these heat transport elements are connected with their internal spaces communicating with each other. A heat transport device featuring: