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介绍了我国新研制的一台大型空间环境模拟器 Ｋ Ｍ６ 所采用的以液氮为制冷介质的带文丘利管的单项密闭泵增压循环制冷系统， 并给出了该制冷系统的调试结果。
This paper introduces a turbocharged recirculation refrigeration system with a venturi tube using liquid nitrogen as cooling medium, which is a newly developed large-scale space environment simulator K M6, and the debugging results of the refrigeration system are given.