This paper introduced the main types of the single pressure absorption - type refrigeration and the two kinds of single pressure absorption refrigeration circulation were compared. The research progress of Einstein refrigeration cycle was summarized. Some of the problems faced in the research process of current Einstein refrigeration cycle were analysed. And at last this paper proposed the prospect of the study on the Einstein cycle.%文中介绍了单压吸收式制冷的主要类型,对两种单压吸收式制冷循环进行了对比阐述.就Einstein制冷循环的研究进展进行了归纳总结,对目前研究Einstein制冷循环所面临的部分问题进行了分析,并对进一步研究提出展望.
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