Variable-temperature Dewar system capable of keeping dynamic vacuum and assembling method of variable-temperature Dewar system

Abstract

The invention relates to a variable-temperature Dewar system capable of keeping dynamic vacuum and an assembling method thereof.The variable-temperature Dewar system comprises a Dewar body, an exhaust mechanism, a refrigerating machine and a sealing mechanism, the Dewar body and a window assembly are connected in a sealed mode, so that construction of a vacuum closed space and integration of a refrigerating assembly and a shell are achieved; the stability of a performance test environment of an infrared detector chip is ensured, establishment and maintenance of a dynamic vacuum environment are realized through pipeline communication of the exhaust mechanism and the window assembly, the interior of the system can continuously maintain a high vacuum state, and reliable sealing of each joint of the Dewar system is realized through cooperation with multi-point sealing of the sealing mechanism. In addition, precise temperature control is achieved through cooperation of the refrigerating machine and the refrigerating assembly, the infrared detector chip can work stably at the preset temperature, and high-precision performance testing of the infrared detector chip is achieved through cooperation of all functional modules.

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