Contact thermal resistance testing system with variable pressure and temperature in profound hypothermia area

Abstract

The invention discloses a contact thermal resistance testing system with variable pressure and-temperature in a profound hypothermia area. The contact thermal resistance testing system comprises a testing device, a pressure loading device, a heating and temperature measuring device and a refrigerating device; the testing device comprises a vacuum cavity, a thermal insulation multilayer material, an anti-radiation cold shield, a solid thermal insulation material, a sample clamp, a testing platform and a vacuum cavity bottom plate; the pressure loading device comprises a pressure sensor, an airinlet pipeline, a pressure-bearing corrugated pipe and a thermal insulation screw rod; the heating temperature measuring device comprises a heating plate, a temperature sensor and a heating wire; therefrigerating device comprises an oxygen-free copper cold head, a refrigerating machine and a compressor; and the pressure loading device, the heating and temperature measuring device and the oxygen-free copper cold head are mounted in the vacuum cavity, the pressure-bearing corrugated pipe is fixed to the oxygen-free copper cold head and the solid thermal insulation material through the thermal insulation screw rod, the refrigerating machine is mounted on the vacuum cavity bottom plate, and all the devices are tightly connected through screws. The contact thermal resistance testing system with the variable pressure and-temperature in the profound hypothermia area has the advantages of easy operation, small temperature fluctuation, high operability, short test time, high precision and thelike.

Description

technical field [0001] The invention belongs to the field of low-temperature heat exchange, and in particular relates to a contact thermal resistance test system with variable pressure and temperature in a deep low-temperature region. Background technique [0002] The vigorous development of aerospace technology has provided great assistance for human beings to explore the universe. For deep space detectors such as superconducting quantum interference devices, superconducting photon detectors, and millimeter-submillimeter wave detection, space cooling systems are required to provide deep cryogenic temperatures, so high-reliability, long-life cryogenic systems are necessary conditions. Cryogenic systems often work in high-vacuum, low-temperature and microgravity environments. The dominant heat transfer method is not gas convection heat transfer, and its impact is almost negligible. Heat conduction and radiation are the main heat exchange methods inside satellites. It starts ...

AI Technical Summary

Problems solved by technology

[0004] The present invention improves a contact thermal resistance testing system that can realize pressure and temperature adjustment at any time in a vacuum environment in a deep and low temperature zone, has high test accuracy and strong operability, and solves the need to return to normal temperature during the contact thermal resistance test process The normal pressure destroys the vacuum environment to change the pressure and temperature and other problems such as multiple long-term operations, the temperature fluctuation of the refrigerator has a great impact on the measurement accuracy, and the operability is low.

Images