Low-temperature gas throttle valve plate for refrigerating machine

Abstract

The invention discloses a low-temperature gas throttle valve plate for a refrigerating machine, which is mounted at a heat end of a low-temperature heat regenerator of a G-M refrigerating machine. The valve plate is made of a material with high specific heat capacity at low temperature below 50K; the outer diameter of the valve plate and the inner diameter of the low-temperature heat regenerator are in interference fit with each other; a plurality of micro-pores are formed on the valve plate; the diameters of the micro-pores are 0.2-0.6mm; and the thickness of the valve plate is 5-15mm. After the low-temperature gas throttle valve plate provided by the invention is additionally arranged at an inlet of the heat end of the low-temperature heat regenerator, a function for throttling and cooling secondary air inflow is achieved, the heat load of the low-temperature heat regenerator is reduced, the airflow distribution in the low-temperature heat regenerator is improved, the heat exchange efficiency between gas and cooling material is increased, the flow resistance loss is reduced and the whole property of the refrigerating machine is increased.

Description

technical field [0001] The present invention relates to a refrigerator, and more particularly to a low temperature gas throttle plate for a G-M refrigerator. Background technique [0002] With the rapid development of modern science and technology such as aerospace technology, infrared technology, atomic energy technology, and superconducting technology, many scientific instruments related to these technologies have better performance at low temperature, faster operation speed, higher efficiency and sensitivity, Therefore, an important branch of the low-temperature technology related to the above-mentioned technology-small low-temperature refrigerators are also developing vigorously, and its applications have penetrated from national defense, military, and aerospace departments to transportation, information, medical, electronics and other commercial fields. In many occasions, such as infrared radiometers on meteorological satellites, nuclear magnetic imagers in the medical ...

AI Technical Summary

Problems solved by technology

With the increasingly wide application of high-temperature superconducting magnets in electrical technology, such as high-temperature superconducting current limiters, high-temperature superconducting transformers, high-temperature superconducting energy storage systems, etc. There is an urgent demand for a large number of low-temperature refrigerators, and conventional single- and double-stage G-M refrigerators cannot meet the cooling requirements of high-temperature superconducting magnets

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