IEC 60335-2-40:2022 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60335-2-40:2022 EXV includes the content of the references made to IEC 60335-1:2010+AMD1:2013+AMD2:2016 CSV. IEC 60335-2-40:2022 deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units. Their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for multi-phase appliances. Appliances not intended for normal household use but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. The appliances referenced above can consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are used together, and the requirements are based on the use of matched assemblies. This document does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817. Flammable refrigerants are limited to those of a molar mass of more than or equal to 42 kg/kmol based on WCF (worst case formulation) as specified in ISO 817. As far as practical, this document deals with common hazards presented by appliances that are encountered in normal use and assumes that installation, servicing, decommissioning, and disposal are safely handled by competent persons and accidental release of refrigerants is avoided. However, it does not prescribe the criteria to ensure competence of persons during installation, servicing and disposal. Safety requirements during disposal are not specified in this standard. Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance. Attention is drawn to the fact that – for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary; – in many countries, additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations.
2022年9月5日，国际电工委员会（IEC）发布了IEC60335-2-40，家用和类似用途电器的安全第2-40部分：热泵、空调器和除湿机的特殊要求新版本，涉及热泵、生活用热水热泵和空调的安全性，包括电机压缩机以及循环风机盘管、除湿机（带或不带电机压缩机）、热电热泵和部分装置。
单相器具额定电压不超过300 V，多相器具额定电压不超过600 V。
本文件不适用于
（1）用于加热和冷却设备的加湿器(IEC 60335-2-88)；
（2）专门为工业加工而设计的器具；
（3）准备用于某些特殊条件下的器具，例如，存在腐蚀或爆炸性气体（灰尘、蒸汽或煤气）的地方。
此次发布的第七版标准将取代2018年出版的第六版标准。
本标准主要变更的内容如下：
（1）第1条：将热电热泵添加到范围内，并将单相器具的额定电压增加到300 V；
（2）第7条：修订了设备和包装上的标记要求，包括最小占地面积的符号和修改易燃制冷剂的符号以符合ISO 817的安全组；（3）第11条和第19条：重组以符合第1部分并增加了对补充空气加热器的要求；
（4）第13和16条：修改了固定式I类电动器具的漏电流要求；
（5）第21条：增加了颗粒泡沫材料的要求，修改了运输试验的要求；
（6）第22条：取消了对具有多个制冷系统的器具的制冷剂充注总量的限制，并修订了对避免火源、泄漏检测系统、安全截止阀和颗粒泡沫材料的要求；
（7）第23条：增加了避免电线与制冷剂管道接触的要求；
（8）第24条。
