R22密闭型离心式冷水机组投放市场由美国CARRIER公司制造,以R22为工质的19XL型密闭型离心式冷水机组已开始交付用户使用。在空调制冷领域,R22制冷剂因为工作压力较高,分子量小,在速度型压缩机如离心式压缩机的工质压缩过程中,存在提高叶轮转速等一系列涉及气体动力学设计以及机械制造工艺等等难题,故R22制冷剂以往一般仅应用于容积式压缩机如往复活塞式、滚动转子式以及螺杆式压缩机等中、小型制冷系统中,只是在容量为7000KW以上的开启型离心式冷水机组才使用。 R22 sealed centrifugal chillers on the market by the United States CARRIER company to R22 as working fluid type 19XL closed centrifugal chillers have begun to be delivered to users. In the field of air conditioning and refrigeration, R22 refrigerant because of the higher working pressure, the molecular weight is small, in the speed compressor, such as centrifugal compressor working fluid compression process, there is to improve the impeller speed and a series involving gas dynamic design and mechanical manufacturing process So R22 refrigerant in the past generally only used in positive displacement compressors such as reciprocating piston, rolling rotor and screw compressors, small and medium refrigeration systems, only in the capacity of 7000KW above the open centrifugal cold water Crew only use.