IEC 60335-2-40:2022涉及电动热泵、卫生热水热泵和空调的安全性，包括电动压缩机以及循环风机盘管装置、除湿机（带或不带电动压缩机）、热电热泵和部分装置。单相电器的最大额定电压不超过300伏，多相电器的最大额定电压不超过600伏。不用于正常家庭使用但可能对公众造成危险的电器，如用于商店、轻工业和农场的非专业人员使用的电器，属于本标准的范围。上面提到的器具可以由一个或多个工厂制造的组件组成。如果在多于一个组件中提供，则单独的组件一起使用，并且要求基于匹配组件的使用。本文件不考虑ISO 817定义的A1、A2L、A2和A3组以外的制冷剂。易燃制冷剂限于基于ISO 817中规定的WCF（最差情况配方）的摩尔质量大于或等于42kg/kmol的制冷剂。在可行的情况下，本文件涉及设备在正常使用中遇到的常见危险，并假设安装、维修、退役和处置由合格人员安全处理，并且避免了制冷剂的意外释放。然而，它没有规定在安装、维修和处置过程中确保人员能力的标准。本标准未规定处置过程中的安全要求。辅助加热器或其单独安装的规定在本标准的范围内，但仅限于作为电器组件一部分设计的加热器，控制器包含在电器中。提请注意以下事实: -对于拟用于车辆或船上或飞机上的器具，可能需要附加要求； -在许多国家，例如，负责劳工保护的国家卫生当局和负责储存、运输、建筑和装置的国家当局规定了额外的要求。 本文件不适用于 -用于加热和冷却设备的加湿器（IEC 60335-2-88）； -专门为工业加工设计的器具； -拟在有特殊条件的地方使用的器具，例如存在腐蚀性或爆炸性环境（灰尘、蒸汽或气体）。 这第七版取消并取代了2018年出版的第六版。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: -条款1:在范围中增加了热电热泵，并将单相电器的最大额定电压提高到300 V； -第7条:修订了器具和包装上的标记要求，包括最小占地面积的符号，并修改了易燃制冷剂的符号，以包括符合ISO 817的安全组； -第11条和第19条:为与第1部分保持一致而进行了重组，并增加了对辅助空气加热器的要求； -第13条及第16条:修订固定I类电动器具的漏电流规定； -第21条:增加了颗粒泡沫材料的要求和修订了运输测试的要求；-第22条:取消了对具有多个制冷系统的电器的制冷剂充注总量的限制，并修订了避免点火源、泄漏检测系统、安全关闭阀和颗粒泡沫材料的要求； -第23条:增加了避免电线与制冷剂管道接触的要求； -第24条

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.
This document does not apply to
- humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88);
- appliances designed exclusively for industrial processing;
- appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This seventh edition cancels and replaces the sixth edition published in 2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- Clause 1: added thermoelectric heat pumps to the scope and increased maximum rated voltage to 300 V for single phase appliances;
- Clause 7: revised requirements for marking on the appliance and packaging, including a symbol for minimum floor area and modifying the symbol for flammable refrigerants to include the safety group per ISO 817;
- Clause 11 and Clause 19: restructured for alignment with Part 1 and added requirements for supplementary air heaters;
- Clause 13 and Clause 16: revised requirement for leakage current for stationary class I motor-operated appliances;
- Clause 21: added requirements for particle foam material and revised requirements for transport testing;
- Clause 22: removed limit on the sum of refrigerant charges for appliances with multiple refrigerating systems, and revised requirements for avoiding ignition sources, leak detection systems, safety shut-off valves, and particle foam material;
- Clause 23: added requirements to avoid contact between wires and refrigerant piping;
- Clause 24