目前企业在役制冷机普遍使用R22制冷剂,因R22的分子构成中含有氯元素,会对臭氧层造成破坏,同时还会产生温室气体,有温室效应,根据《蒙特利尔协议书》的要求,将在世界范围内禁止使用。中国作为发展中国家应该在2030年之前停止使用,目前已在推广的替代物是碳氢制冷剂,具有代表性的有R433b、R404a等,性能更好的制冷剂正在研发之中, At present, R22 refrigerants are commonly used in the refrigerating machines of enterprises in service. Because the molecular composition of R22 contains chlorine, it will cause damage to the ozone layer, and will also produce greenhouse gases and greenhouse effect. According to the Montreal Protocol, Prohibited worldwide. As a developing country, China, as a developing country, should stop using its products by 2030. At present, the substitutes that are being promoted are hydrocarbon refrigerants. Representative refrigerants such as R433b, R404a, etc. with better performance are being developed.