JPH0726793B2 - Cold plate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cold plate for absorbing heat generated in a space experiment device, and more particularly to a cold plate capable of absorbing heat without using power.

[Prior Art] Recently, various experiments using a space lab have been tried. When using this space experiment device, the heat generated in the device is stored without escaping, so the experimental device is placed on a cold plate and the heat generated in the experimental device is absorbed by the cold plate.

Conventionally, as the cold plate used in space, a single-phase flow cold plate using a pump is used as shown in FIG.

In FIG. 3, a is a cold plate on which an experimental apparatus b is mounted, and a primary cooling water supply pipe c is connected to the cold plate a, and cooling water cooled from a circulation pump (not shown) or the like is cold plate. After being supplied to the inside a, the plate a absorbs the heat of the experimental device b, and then the heat recovered by being returned to the pump side through the other experimental device heat exchanger d and its primary cooling water return pipe e is radiated. Then, after cooling, it is supplied again into the cold plate a.

[Problems to be Solved by the Invention] However, since this cold plate forcibly circulates cooling water by a pump or the like and absorbs heat, there is a problem that power for driving the pump is required.

An object of the present invention is to provide a cold plate which can absorb heat generated by an experimental device without power consumption.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a space experiment device in a cold plate for mounting a space experiment device and absorbing heat generated by the experiment device. It has a mounting surface to be mounted and has an evaporation chamber in which a porous material such as a wick is lined on the inner surface of a grid or spiral groove formed inside the mounting surface side, and the evaporation chamber is partitioned from the evaporation chamber. And a heat receiving part having a flow chamber for supplying the condensed liquid to the porous body of the evaporation chamber, and a heat radiating surface, such as a wick on the inner surface of the grid or spiral groove formed inside. The porous body has a condensing chamber lined with the condensing chamber and a heat dissipating part having a flow chamber which is partitioned from the condensing chamber and receives the condensate generated in the condensing chamber. Separated from the above, the above placement surface is up The heat-receiving surface is located downward and both flow chambers are vertically opposed to each other, and the vaporized gas generated in the vaporizing chamber is guided to the condensing chamber between the vaporizing chamber of the heat receiving part and the condensing chamber of the heat radiating part. It is a cold plate in which a vapor flow path is connected, and a liquid flow path for supplying the condensed liquid from the flow chamber of the heat radiating unit to the flow chamber of the heat receiving unit is connected between the flow chamber of the heat radiating unit and the flow chamber of the heat receiving unit.

[Operation] According to the above configuration, the heat of the experimental apparatus is absorbed by the latent heat of the liquid in the evaporation chamber, and this evaporated gas is guided to the condensation chamber of the heat radiation section through the vapor flow path and condensed there, and the condensate flows. By flowing the condensate in the flow chamber into the flow chamber of the heat receiving part through the liquid flow path using surface tension, the evaporative gas and the condensate can be separated and circulated. Transfer of condensate in the flow chamber, evaporation chamber, and condensation chamber can be done smoothly, and liquid such as refrigerant is circulated in a weightless state,
The heat of the experimental device absorbed by the heat receiving section can be radiated by the heat radiating section. Further, the heat receiving portion and the heat radiating portion are separated by a predetermined distance, and by connecting them with the vapor flow path and the liquid passage, the degree of freedom in the arrangement of the heat radiating portion is increased, and the heat radiation design is facilitated.

[Embodiment] A preferred embodiment of the cold plate according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 is a heat-receiving portion having a mounting surface 1a on which a space experiment device (not shown) is placed, and inside the heat-receiving portion 1 is formed an evaporation chamber 2 consisting of a grid-shaped groove or a spiral groove. Is
The inner surface 2a is lined with a porous body 3 such as a wick, and the inside of the heat receiving portion 1 is partitioned by a screen 4 into an evaporation chamber 2 and a liquid flow chamber 5.

Reference numeral 6 denotes a heat radiating portion, which has the same structure as the heat receiving portion 1 and is provided with a condensing chamber 7 formed by a grid-like or spiral groove, and a porous body 8 such as a wick is lined on the inner surface 7a thereof and a screen 9 is partitioned into a condensation chamber 2 and a liquid flow chamber 10.

The vaporizing chamber 2 and the condensing chamber 7 are communicated with each other by a vapor flow passage 11, and the flow chamber 5 of the heat receiving portion 1 and the flow chamber 10 of the heat radiating portion 6 are connected to the fluid flow passage 12.
Be communicated with.

A liquid 13 such as a refrigerant is enclosed in the evaporation chamber 2 and the condensation chamber 7.

Next, the operation of this embodiment will be described.

The heat generated in the experimental device enters the heat receiving portion 1 from the mounting surface 1a of the heat receiving portion 1 as shown by the arrow in the figure, and evaporates the liquid that has permeated the porous body 3 on the inner surface 2a of the evaporation chamber 2, The vaporized gas is guided to the condensing chamber 7 of the heat radiating portion 6 through the vapor passage 11. Although not shown in the heat radiating section 6, the radiant heat radiates heat or is cooled by other cooling means, and the evaporative gas that has flowed into the condensing chamber 7 condenses due to the temperature decrease and becomes a condensate and becomes a condensing chamber. 7 penetrates into the porous body 8. This condensate flows from the porous body 8 through the screen 9 into the flow chamber 10 due to its surface tension, flows through the liquid passage 12 into the flow chamber 5 of the heat radiating section 1, and passes from the flow chamber 5 through the screen 4. Permeate into the porous body 3 of the evaporation chamber 2 and evaporate again in the evaporation chamber 2 to repeat the above cycle.

As described above, by evaporating and condensing the enclosed liquid 13, the heat in the heat receiving portion 1 is transferred to the heat radiating portion 6 and radiated, so that the heat from the experimental apparatus can be absorbed without power. In this case, by separating the liquid passage 12 and the vapor passage 11, the circulation of the enclosed liquid is improved, and the heat transfer area in the heat receiving portion 1 can be set large according to the experimental device.

FIG. 2 shows another embodiment of the present invention. Instead of providing the screens 4 and 9 in the heat receiving portion 1 and the heat radiating portion 6 to form the flow chambers 5 and 10, respectively, the flow chambers 5 and 10 are also provided. The porous body 14 made of a wick is provided, and at the same time, the porous body 14 is also provided in the fluid passage 12.

In this example, a porous material is used in the flow chambers 5 and 10 and the liquid passage 12.
14 is provided, and there is some resistance when flowing, but unlike in FIG. 1, there is no need to consider the size of the eyes of the screens 4 and 9, which facilitates the design.

[Effects of the Invention] As is clear from the above description, according to the present invention, the following excellent effects are exhibited.

(1) An evaporation chamber is formed in the heat receiving part on which the experimental device is mounted, a condensation chamber is formed in the heat dissipation part, the enclosed liquid is evaporated in the evaporation chamber, and the evaporated gas is condensed in the condensation chamber to transfer heat. Since this is done, the heat of the experimental device can be absorbed without power.

(2) The passage of the enclosed liquid that circulates in the evaporation chamber and the condensation chamber is separated into a vapor flow path and a liquid flow path, so that heat can be efficiently transferred.

(3) By forming a condensate flow chamber in each of the heat receiving portion and the heat radiating portion, the transfer of the condensate liquid between the evaporation chamber and the condensation chamber can be performed smoothly even in a weightless state, and both flow chambers are connected by a liquid flow path. By connecting the evaporation chamber and the condensation chamber with the vapor passage, it is possible to efficiently circulate between the condensation chamber and the evaporation chamber while separating the evaporated gas and the condensed liquid.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing another embodiment of the present invention, and FIG. 3 is a perspective view showing a conventional example. In the figure, 1 is a heat receiving part, 2 is an evaporation chamber, 3 and 8 are porous bodies, 6 is a heat dissipation part, 7 is a condensation chamber, 11 is a vapor flow path, and 12 is a liquid flow path.

Claims (1)

[Claims] 1. A cold plate for mounting a space experimental device and absorbing heat generated by the experimental device,
It has a mounting surface on which the space experiment device is mounted and has an evaporation chamber in which a porous material such as a wick is lined on the inner surface of a grid or spiral groove formed inside the mounting surface side. A heat receiving portion which is partitioned from the evaporation chamber and has a flow chamber for supplying condensed liquid to the porous body of the evaporation chamber, and a heat dissipation surface, and an inner surface of a grid or spiral groove formed inside And a heat radiating section having a condensing chamber lined with a porous body such as a wick and being partitioned from the condensing chamber and receiving a condensate generated in the condensing chamber. Are vertically separated by a predetermined distance so that the placing surface is above and the heat receiving surface is below, and both flow chambers face each other vertically, and between the evaporation chamber of the heat receiving portion and the condensation chamber of the heat radiating portion, Vapor that guides the vaporized gas generated in the evaporation chamber to the condensation chamber A cold plate characterized by connecting a passage and connecting a liquid flow path for supplying the condensed liquid from the flow chamber of the heat radiating unit to the flow chamber of the heat receiving unit between the flow chamber of the heat radiating unit and the flow chamber of the heat receiving unit. .