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沈阳医疗器械厂生产的FB561型低温冰箱,采取高温端用F-12、低温端使用F-13二级制冷,保温范围为-40℃至-60℃。在修理一台低温冰箱低温端压缩机组时,F-13未能及时回收,机组修好后因难以购置F-13,所以长期闲置不能使用。后考虑到该低温冰箱实际使用的温度范围在-20℃至-30℃之间,而F-22的蒸发温度为-40℃,我们就用F-22代替F-13。F-22与F-13的蒸发温度不同,压力也不同,所以制冷剂的
The FB561 low-temperature refrigerator produced by Shenyang Medical Instrument Factory adopts F-12 at the high temperature end and F-13 secondary cooling at the low temperature end, and the heat preservation range is -40°C to -60°C. When repairing a low-temperature refrigerator low-temperature compressor unit, F-13 was not recovered in time. After the unit was repaired, it was difficult to purchase the F-13, so it could not be used for a long period of time. After considering that the temperature range for practical use of the low-temperature refrigerator is between -20°C and -30°C, and the evaporation temperature of F-22 is -40°C, we use F-22 instead of F-13. The evaporation temperature of F-22 and F-13 is different, the pressure is also different, so the refrigerant