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本文介绍了单级螺杆压缩机采用中间补气、喷液冷却方法用于低温制冷系统，以笔者设计的－４１℃蒸发温度的氮气冷却机组为例，叙述了机组的流程，设计计算等问题。
In this paper, the single-stage screw compressor is introduced into the low-temperature refrigeration system by using the middle-pressure gas and liquid-jet cooling method. Taking the nitrogen cooling unit with the evaporation temperature of -41 ℃ as an example, this paper describes the flow, design and calculation of the unit.