住宅室内PM2.5净化状况的实测研究*
Measurement study of indoor PM2.5 purificationconditions in residences
摘要：
为认识住宅室内PM2.5实际的通风净化状况，对北京地区15户住宅客厅和卧室的室内PM2.5浓度、空气净化器和机械新风系统的运行功率及外窗开关状态进行了连续测试记录。基于不同室外PM2.5污染等级下室内PM2.5质量浓度低于35 μg/m3的相对时长，提出了室内PM2.5净化时间达标率的概念，由此分析了室外PM2.5污染等级、房间通风净化方式等对室内PM2.5净化时间达标率的影响。结果表明：现有以开窗率和净化开启率描述的通风净化策略并不理想；对于室外PM2.5污染等级为轻度至重度的情况，通过优化通风净化策略可改善室内PM2.5环境。
Abstract：
In order to understand the actual ventilation and purification status of indoor PM2.5 in residences, tests the indoor PM2.5 concentration, the operating power of air purifiers and mechanical outdoor air systems, and the on-off state of external windows in the living rooms and bedrooms of 15 apartments in Beijing. Based on the relative duration of indoor PM2.5 mass concentration below 35 μg/m3 under different outdoor PM2.5 pollution levels, puts forward the concept of indoor PM2.5 purification time compliance rate, and analyses the effect of outdoor PM2.5 pollution level and room ventilation and purification strategy on indoor PM2.5 purification time compliance rate. The results show that the existing ventilation and purification strategy described by the window opening frequency and running ratio of air purifiers is not ideal. The indoor PM2.5 environment can be improved by optimizing the ventilation and purification strategy when outdoor PM2.5 pollution level is from mild to severe.
Keywords:residence,fineparticlematter(PM2.5),purificationtimecompliancerate,ventilationandpurificationstrategy,windowopeningfrequency,runningratioofairpurifier
