Long-distance cold transfer device based on small cryogenic refrigerator

Abstract

The invention provides a long-distance cold transfer device based on a small cryogenic refrigerator. The device comprises a vacuum chamber and the cryogenic refrigerator fixedly arranged in the vacuumchamber, the lower end of the vacuum chamber is in detachable sealing connection with a test chamber for containing a sample to be tested, a cold shield is arranged in the vacuum chamber, the lower part of the small cryogenic refrigerator is inserted to the cold shield, a first heat exchanger is fixedly arranged at the lower end of the small cryogenic refrigerator, a second heat exchanger capableof exchanging heat with the sample to be tested is arranged in the test chamber, the first heat exchanger and the second heat exchanger are connected by a circulating pipeline, and the circulating pipeline is positioned in the cold shield. The device can meet the installation requirements of a test space, makes the low temperature test of the sample easy, and has a application range.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and low-temperature engineering, in particular to a long-distance cooling transfer device based on a small-sized low-temperature refrigerator. Background technique [0002] At present, the cryogenic systems used in superconducting material research, electromagnetics, cryogenic optics and other fields not only have requirements for the temperature, cooling capacity, cooling time, and temperature range of the cryogenic sample stage, but also put forward requirements for the installation size of the refrigerator. extremely stringent requirements. [0003] Small cryogenic refrigerators are important equipment for obtaining extremely low temperatures in the prior art. In cooling systems using small cryogenic refrigerators as cold sources, samples are often connected to the cold head of the refrigerator by direct contact or indirectly using a cold chain to This achieves the purpose of cooling the...

AI Technical Summary

Problems solved by technology

[0003] Small cryogenic refrigerators are important equipment for obtaining extremely low temperatures in the prior art. In cooling systems that use small cryogenic refrigerators as cold sources, samples are often connected to the cold head of the refrigerator by direct contact or indirectly using a cold chain to This achieves the purpose of cooling the sample. However, through direct contact with the cold head, although the sample cools quickly and is easy to control the temperature, the connection between the sample and the cold head is limited by its shape, size, weight, and ease of replacement. , the scope of application is limited. At the same time, although some of the above problems can be effectively solved through cold chain transfer, the cooling time of the sample will increase accordingly, and the minimum temperature will also be limited.

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