中文摘要：

针对国外空气净化器标准中的适用面积指标及我国的相关研究现状，指出了现有适用面积算法仅考虑颗粒物去除的不合理性，探究了室内颗粒物与气态污染物源的不同特点，利用质平衡模型提出了新的去除气态污染物的适用面积计算方法，并以去除甲醛的适用面积为例与颗粒物进行对比．结果表明：空气净化器去除甲醛的CADR值不及颗粒物CADR值的35%,，导致空气净化器针对气态污染物的适用面积远小于颗粒物的适用面积．上述结果说明将去除气态污染物的空气净化器用于颗粒物的适用面积房间，会使空气因空气净化器净化效力不足而不能达标．

英文摘要：

According to the commended room size index in foreign standards for portable air cleaners and the relevant study in China,this paper points out that it is unreasonable to calculate the commended room size only considering the particle matters. The different characteristics of indoor gaseous chemical contaminants and particle matters were discussed. A new method was figured out to calculate the commended room size considering gaseous chemical contaminants,and the commended room size for formaldehyde was calculated as an example to compare with that for PM2.5. Results show that the CADR for formaldehyde is no more than 35% of the CADR for PM2.5,which accounts for the much smaller room size for formaldehyde. Therefore,the gaseous chemical contaminants in ambient air may not be purified to the standard concentration if the air cleaner is applied to a room with the commended room size only considering PM2.5.