R22活塞式制冷压缩机在冷凝温度<20℃,蒸发系统设计合理的情况下能制取60℃～-70℃的低温,这与压缩机本身的效率很有关系。现举一实例加以分析。本单位使用上海医用分析仪器厂(原医疗器械三厂)配套制造的“LGJ”型冷冻真空干燥机若干台,其中制冷系统配以2 F——6.5水冷机组,系单级压缩,工作时容器内的温度 R22 piston refrigeration compressor condensing temperature <20 ℃, evaporative system design reasonable circumstances can produce 60 ℃ ~ -70 ℃ low temperature, which is related to the efficiency of the compressor itself. Now give an example to be analyzed. The unit uses a number of sets of “LGJ” type frozen vacuum dryers manufactured by Shanghai Medical Analytical Instrument Factory (formerly Medical Device Factory No. 3). The refrigeration system is equipped with 2 F - 6.5 water cooled units, which are single stage compression and working container The temperature inside