强制性国家标准GB 9237《制冷系统及热泵安全与环境要求》主要修订点及标准中几个关键问题释义

The background and necessity of the revision of the national standard GB 9237 "refrigeration system and heat pump safety and environmental requirements" was discussed in this paper. The similarities and differences between the standard and the corresponding international standard ISO 5149: 2014 were illustrated, and the difficult problems in the new edition standard were discussed. The new version of GB 9237 standard provides the technical support for the safe use of flammable refrigerants, and will reduce the hazard and risk of refrigeration systems or refrigerant to life, property and the environment.