新版IEC60335-2-40标准对可燃性制冷剂充注量规定解析

Analysis on Regulation of Refrigerant Charge Limits for Flammable Refrigerants in Latest Version of IEC60335-2-40 Standard

为更好理解和应用最新发布的IEC60335-2-40标准要求,指导我国房间空调器产品采用可燃性环保制冷剂的应用,本文研究和分析了最新发布的标准对于A2和A3类制冷剂充注量要求,以两个实际样机的情况为例,按照标准最新的要求,给出了计算步骤和方法。本文发现新版标准对于A2和A3类制冷剂充注量的要求给出了类似目录的方法,实际中可根据不同的选择,确定可燃性制冷剂的充注量限值,尤其是对于制冷量较大的房间空调器产品,新版标准中对于可燃性制冷剂充注量的限值有了较大的改变,为应用环保高效的天然制冷剂提供了途径。新版标准的发布将为我国和全球房间空调器行业制冷剂的替代提供更科学和合理的指导。

In order to better understand and follow up the requirements of the latest version of IEC 60335-2-40 to provide the guide on the application of environmentally friendly flammable refrigerants in room air conditioner sector in China,this article studied and analyzed the requirements on the charge limits of A2 and A3 refrigerants in the latest standard.Taken two actual prototypes as an example,the calculation and methods on charge limits are given in accordance with the latest requirements of the standard by this article.It can be found that the new version of the standard provides a similar catalog method for the charge size of A2 and A3 refrigerants.In practice,the charge size limit for flammable refrigerant can be determined according to different choices.Especially for room air conditioner with large cooling capacity,the charge limit of the flammable refrigerant is greatly increased in the new version of the standard and the possible solution was provided to use environmentally friendly and high efficient natural refrigerants.The release of the new standard will provide more scientific and reasonable guidance to replace refrigerants in China and the global room air conditioner industry.