To obtain the low temperature of 90 K, the Linder refrigeration cycle with pre-cooling cycle was set up.The pre-cooling cycle and refrigeration cycle of the system were designed.

• 摘要为了获得90K的低温，提出1套带预冷循环的林德制冷系统，并分别对该系统的预冷循环和制冷循环进行了设计。