High-efficiency radiation cold plate for spacing

Abstract

The invention relates to a radiation cold plate for space, especially a radiation cold plate adopting radiation heat exchanging technology for aerospace space field, the invention comprises a metal mirror face, a baseboard and an aluminum cellular; characterized in that, the cellular is made of aluminum, the cellular hole is regular polygon-shaped, the height of the cellular is consistent with the height of the baseboard inner tray, and the cellular is connected in the baseboard dish-shaped interior by a braze welding mode; each cellular hole is formed to a black body cavity by jet printing the black coating, the back face of the baseboard is a metal mirror face, a plurality of coatings are made by nickel plating, optical polishing, gold plating and transparent silicon oxide film plating. The invention increases the radiation heat exchanging area, improves the radiation surface emitting rate and heat conductivity coefficient, reduces the heat radiation influence of the outer heat flow to the cold plate, has advantages of high structural strength, light weight and high radiation heat exchanging efficiency, the invention can be used for the infrared detecting radiation cooling device, a spacecraft heat control apparatus and a space environment ground simulator and so on space radiation heat exchanging apparatuses.

Description

technical field [0001] The invention relates to a radiation cold plate for space, belonging to the technical field of space low temperature. Background technique [0002] The universe is a high-vacuum, cool black background of about 3-4K, and the space radiation refrigeration technology is a refrigeration and heat transfer technology developed by utilizing the natural high vacuum, deep low temperature and black heat sink conditions of the universe. Its working principle It is: use high-efficiency radiation cold plate to radiate energy to the deep-cold space of the universe, perform radiation heat exchange, reduce the temperature of the target object, and achieve the purpose of cooling. Radiation refrigeration is a passive refrigeration technology, which has many advantages such as good stability, high reliability and no power consumption. Therefore, in spacecraft thermal control tasks, radiation cooling is used as an important thermal control method, such as radiation coole...

AI Technical Summary

Problems solved by technology

However, the limitations of spacecraft on the size, volume, and weight of radiative cooling devices also restrict the various structures and performances of radiative cold plates.

At present, many radiation heat exchange equipment of my country's spacecraft cannot better meet the requirements of space radiation cooling under restricted conditions.

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