JPS6193391A - Panel type structural material using heat pipe - Google Patents

Abstract

PURPOSE:To provide a panel type material that dose not allow an uneven distribution of temperature around the unit by disposing a flat plate wicks under the front and back panel skins between which honeycomb structural material is disposed which is alternately filled with wick. CONSTITUTION:When a heat generating unit is mounted on the panel outer skin 1a, the operating medium inside a flat plate wick 3a near the heated spot is vaporized. Because of a fact that the vapor moves to a vapor space 5 and the vapor has a propensity to become at a uniform temperature in the space 5, the temperature across the space 5 and flat plate wick 3 becomes equalized, and any localized temperature distribution is averaged out across the entire area of the panel outer skin. The panel outer skin 1b plays a role of releasing heat, and the vaporized operating medium is cooled in the flat plate wick 4 to be condensed to return to the operating liquid, which again moves to the flat plate wick 3a due to the capillary action of the wick 4 filled in the honeycomb 2. By such a heat pipe function, the heat applied to the panel outer skin 1a is released from the panel outer skin 1b.

Description

[Detailed Description of the Invention] Field of the Invention The present invention relates to a panel-shaped structural material to which a heat pipe is applied, and in particular to a structural material whose structure itself also has a heat pipe function while being a structural material. .

BACKGROUND OF THE INVENTION In general, panel-shaped structural materials are used as mounting structure panels for component units of ground equipment or space equipment.
When unit No. 7 generates heat during operation, due to the thermal conductivity of the panel-shaped structural material, although heat is conducted to the surrounding area, an uneven temperature distribution occurs around the unit. .

Therefore, due to the uneven distribution of temperature 1 around the heat generating unit, the unit operable temperature range of the environmental temperature surrounding the heat generating unit is reduced by the uneven temperature distribution in the panel-shaped structural material.

Therefore, if it is necessary to expand the operational range,
A heat pipe or the like is attached to the heat generating unit, and measures are taken to reduce the uneven distribution of temperature. In this way, when a heat pipe is used to absorb the uneven distribution of temperature, an increase in the exclusive volume and weight of the installed heat pipe occurs. These issues, especially for space equipment, have effects such as limiting the environmental temperature range and increasing payload capacity.

FIG. 1 is a cross-sectional view of a conventional panel-shaped structural material using a honeycomb as a structure between the panel outer skins, and numeral 1 indicates the panel outer skin and 2 indicates the honeycomb.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional circumstances.
Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and to provide a novel panel that does not cause uneven distribution of temperature around the unit due to the high thermal conductivity of the structural material itself of the present invention, regardless of the heat generated by the unit. Our goal is to provide shaped structural materials.

Structure of the Invention In order to achieve the above object, the present invention arranges flat wicks inside the front and back panel skins, and arranges a honeycomb structure material between the flat wicks.

The inside of this honeycomb structure material is alternately filled with wicks. The structure of the flat wick is such that the working liquid can be distributed over the entire surface of the flat wick, and the structure between the honeycomb and the panel skin provides sufficient structural strength against stress and tension applied to the panel skin. It shall be equipped with a supporting structure that allows for

EMBODIMENT OF THE INVENTION Hereinafter, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 2 is a schematic cross-sectional view showing an embodiment of the present invention, and the same reference numerals as in FIG. 1 are given the same reference numerals.

In FIG. 2, when a heat generating unit is mounted on the panel outer skin 1a, the working liquid inside the heated flat plate wick 3a is vaporized. Then, as this steam moves to the steam space 5, the temperature of the steam tends to be uniform within the steam space 5, so that the entire area within the steam space 5 and the flat wick 3 becomes isothermal. For this reason, local temperature unevenness is averaged over the entire panel skin. in this case,
The panel outer skin 11) serves as a heat dissipator, and the vaporized working fluid is cooled in the flat wick 3b, condensed, and returned to working fluid. This working liquid moves again to the flat wick 3aK by the capillary action of the wick 4 filled in the honeycomb. Due to this heat pipe function, the heat applied to the panel outer cover 1a is radiated to the outside through the panel outer cover 1b.

Functions and Effects of the Invention As explained above, according to the present invention, the uneven distribution of temperature around the heat generating unit is averaged over the entire panel skin 1a, and the heat applied to the panel skin 1a by the heat generating unit is distributed throughout the panel skin 1a. Since heat is radiated to the outside of the outer skin 1b, the temperature rise of the outer skin panel la around the heat generating unit relative to the environmental temperature is relatively small compared to the case where a conventional panel-shaped structural material is used. Therefore, the operational temperature range of the nine temperature ranges surrounding the heat generating unit can be relatively wide compared to when conventional panel-shaped structural materials are used.

Moreover, this effect becomes even more remarkable as the amount of heat generated by the heat generating units mounted on the panel outer skin 1a increases, and as the number of heat generating units increases.

Furthermore, according to the present invention, since the structural material itself has a heat pipe effect, there is no need to newly install a heat pipe for dissipating the heat generated by the heat generating unit. This not only eliminates the conventional increase in volume and weight due to heat pipe installation, but also eliminates the need for man-hours such as designing the heat pipe itself and designing the structural layout for installing the heat pipe. becomes. The reduction in area and weight due to the need for heat pipes is expected to result in an increase in the number of on-board units or enhancement of the functions possessed by satellite equipment or ground equipment, respectively.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional panel-shaped structural material using a honeycomb as a structure between panel outer skins, and FIG. 2 is a cross-sectional view showing an embodiment of the panel-shaped structural material according to the present invention. 1... Panel outer skin, 2... Honeycomb, 3... Flat wick, 4... Honeycomb filling wick, 5...
steam space

Claims (1)

[Claims] In structural materials used for space equipment and ground equipment,
It has a heat pipe function by two flat plate wicks placed inside both the front and back structural skins, and a steam space and a honeycomb filling wick placed between the two flat plate wicks, and A panel-shaped structural material using a heat pipe, which is characterized in that the entire structure described above also has the function of a structural material.