用于移动空调系统的机械蒸汽压缩系统制冷剂的安全性和密封性

[中文适用范围]： 目的：本 SAE 推荐做法仅限于由车辆或辅助发动机驱动的机械蒸汽压缩制冷系统，因为所有目前已知或提议的涉及任何安全问题的乘客室冷却系统都属于该类型。无意限制用于客舱冷却的其他类型制冷系统的使用或进一步开发。如果将来发现其他系统实用@，则可能会对本 SAE 建议实践进行修改，或者为此类其他系统制定额外的建议安全实践。 [外文原描述]： This SAE Standard applies to refrigerant vapor compression systems that provide cooling and/or heating for passenger cars, light trucks, and commercial vehicles (on and off road) that use automotive type mobile air conditioning (MAC) systems. Large trucks, buses, and other vehicles that do not use typical automotive A/C systems or use refrigerants not listed in this document are not covered by this standard. This standard covers vehicles with MAC systems using belt driven compressors and electric motor driven compressors.This document provides industry-recognized StandardDetails for the design, assembly, and test of MAC systems, including necessary service equipment, and is intended to cover all phases of the lifetime of MAC systems to minimize environmental, health, and safety impacts. The StandardDetails listed in this document cover the currently accepted industry guidelines and procedures. The StandardDetails can be used as requirements for regulatory authorities to meet minimum environmental, health, and safety requirements. Also included are cautionary statements for the service industry to alert technicians to the inadvisability and possible health or safety effects associated with venting refrigerant during service. It is not intended to restrict the use, or further development of, other types of refrigerants or refrigeration systems for MAC applications. This document may be amended, or additional safety StandardDetails created, should other refrigerants or refrigeration systems become practical. This document addresses only HFC-134a (R-134a), carbon dioxide (R-744), HFO-1234yf (R-1234yf), and HFC-152a (R-152a) refrigerants. For R-152a refrigerants, this standard will only apply to secondary loop systems. To prevent system contamination, all refrigerants used in MAC vapor compression systems require unique service fittings and service equipment. The unique service fittings are intended to significantly reduce the potential for refrigerant cross-contamination during service activities.CFC-12 (R-12) is no longer in use in new MAC systems. The service fitting description is maintained as a reference for older vehicles still in use. When retrofitting an R-12 system to use R-134a or when removing R-12 (during vehicle disposal), use service equipment designed for R-12 and certified to meet the requirements of SAE J1990 (R-12 recovery and recycle equipment).Cross Reference: ASHRAE 34,ISO 817,ISO/CD 13043,J1627_201104,J1628_201108,J1657_201104,J1658_201501,J1659_201111,J1660_201104,J1661_201104,J1662_201111,J1732_201111,J1739_202101,J1771_201105,J1989_201105,J1990_201105,J1991_201108,J2064_201508,J2099_201204,J2196_201111,J2197_201108,J2209_201108,J2211_201111,J2296_201206,J2298_201108,J2299_201201,J2670,J2683_201603,J2727_201202,J2765_201707,J2766_201908,J2772_201909,J2773_201702,J2776_201301,J2788_201301,J2791_201301,J2810_201603,J2843_201202,J2844_201110,J2845_201110,J2851_201202,J2888_201201,J2912_201110,J2913_201610,J2927_201206,J51_201504