我国中小型活塞式单级制冷压缩机的三项标准:JB955—67《中小型活塞式单级制冷压缩机型式与基本参数》、JB771—74《中小型活塞式单级制冷压缩机技术条件》、JB772—65《中小型活塞式单级制冷压缩机试验方法》已制订15年以上了,它为我国中小型制冷机的发展奠定了基础。但随着科学技术的发展, China’s small and medium piston single-stage refrigerant compressor of the three criteria: JB955-67 “small and medium piston single stage refrigerant compressor type and basic parameters”, JB771-74 “small piston single stage refrigerant compressor technical conditions ”, JB772-65“ small and medium piston single-stage refrigeration compressor test method ”has been developed for more than 15 years, it has laid the foundation for the development of small and medium-sized refrigerator in our country. However, with the development of science and technology,