电子工业部第十六研究所低温设备研究室研制的“4.4K闭循环制 冷恒温器”经过几年来的实验研究,终于在一九八七年六月份实现4·4K制冷温度。在此基础上、又通过五个月的反复实验,改进方案,于十一月份达到了制冷量大于1·8W、降温时间小于三小时四十五分钟及连续运行三十七小时的国内领先指标。 The “4.4K Closed-Loop Refrigeration Thermostat” developed by the cryogenic equipment research center of the 16th Institute of the Ministry of Electronics Industry finally achieved a cooling temperature of 4K · 4 in June 1987 after years of experimental research. On this basis, through five months of repeated experiments and improvement programs, it reached a leading domestic benchmark with a cooling capacity of more than 1.8W, a cooling time of less than three hours and 45 minutes and a continuous operation of 37 hours in November .