空气过滤器过滤效果评价方法研究

Study on Methods for Evaluation of Filtering Efficiency of Air Filters

目的 为寻找一种重复性好 ,实现条件可控制 ,可避免较多因素干扰的空气过滤器过滤效果的评价方法。方法 参照 ANSI/ AHAM AC- 1- 1998《美国家用便携式家用电动式空气净化器检测标准方法》,采用“空气过滤次数”概念对空气过滤器进行检测 ,根据过滤器的风量而确定所需的实验空间及时间 ,检测指标为 :CO、CO2 、可吸入颗粒物 (IP)、NO2 、SO2 、空气细菌总数。结果 IP、空气细菌总数可作为敏感评价指标。结论 该方法避免了较多的干扰因素 ,测试时间短 ,试验方法重复性好 ,结果稳定 ,易操作 。

Objective To explore a method with good repeatibility, less interference factors and easily controllable experimental conditions for evaluating the filtering efficiency of air filters Methods This evaluating method referred to Standard Examination Method of Household Portable Electrically Powered Air Purifying Set of America(ANSI/AHAM Ac 1 1998) and used the index of the frequency of air filtration (TAF) in the determination.The required sampling space volumes and the sampling duration of testing were determined based on the related different of air capacities.The levels of CO,CO 2,inhalable particulate(IP),NO 2,SO 2 and total count of air bacteria in filtered air were determined Results IP and total count of air bacteria could be used as sensitive indexes for evaluating the efficiency of air filtration Conclusion This method avoided many interference factors.It presented shorter duration of examination,good repeatibility and stability,easy operation and acturally reflected the efficiency of air filters