Dual-temperature zone aerospace refrigerator

Abstract

The invention relates to a dual-temperature zone aerospace refrigerator. The dual-temperature zone aerospace refrigerator includes a refrigerator box and a refrigerating device, the refrigerating device includes a refrigerating machine portion, a cold guide portion and a control portion, the refrigerating machine portion includes a compression unit with a compression chamber, two cold finger unitsand a work recovering unit, two work recovery pistons and a work recovery cylinder form an expansion chamber, the expansion chamber communicates with a first hot end heat exchanger through a first expansion pipe and communicates with a second hot end heat exchanger through a second expansion pipe, a first work recovery chamber communicates with a first compression pipe through a first work recovery pipe, a second work recovery chamber communicates with a second compression pipe through a second work recovery pipe, a first compression pipe is provided with a first electromagnetic valve, a second compression pipe is provided with a second electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve are used for controlling the working states of the first coldfinger unit and the second cold finger unit, the first expansion pipe is provided with a third electromagnetic valve, a fourth electromagnetic valve is arranged on the second expansion pipe, and the third electromagnetic valve and the fourth electromagnetic valve are used for controlling the working state of the power recovery part.

Description

technical field [0001] The invention belongs to the technical field of low-temperature refrigerators, and in particular relates to an aerospace refrigerator with dual temperature zones. Background technique [0002] In recent years, my country's aerospace technology and industry have developed rapidly. In manned spacecraft and the International Space Station, aerospace refrigerators are needed to store aerospace food and biological laboratory supplies for astronauts to conduct scientific research at low temperature. Considering the particularity and economy of aerospace work, the requirements for aerospace low-temperature refrigerators mainly include compact structure, high reliability, high refrigeration efficiency, and low vibration. The pulse tube refrigerator has no moving parts at the cold end, has the advantages of low noise, long life, and low cooling temperature. It has considerable development prospects in the aerospace field. [0003] In addition, there is no nat...

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Problems solved by technology

[0003] In addition, there is no natural convection heat transfer in a gravity-free environment, which leads to the deterioration of the heat transfer conditions in the box. The efficient conduction of cold energy is also one of the problems that aerospace refrigerators need to solve.

Under the low-temperature working conditions and low-vibration requirements of aerospace low-temperature refrigerators, there is no suitable fan that can be used to enhance convective heat transfer

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