1概论90年代早中期,由于空调设备的氯氟烃(CFC制冷剂)的淘汰已经对环境有了显著的正面效果,大幅度减少了大气中的氯,并已被认为是改善臭氧耗减问题的主要因素。CFC的成功淘汰,连同来自管理层和政策制订者对日益增长的环境问题的担忧,继续发出新的更严格的有关使用制冷剂的指令 1 Introduction Since the mid-1990s, the phase-out of CFC refrigerants in air-conditioning equipment has had a significant positive effect on the environment, drastically reducing atmospheric chlorine and has been considered to improve ozone depletion The main factor. The successful phase-out of CFCs, along with concerns from management and policymakers over the growing environmental problems, continues to issue new, more stringent directives on the use of refrigerants