细颗粒物粒径分布对负离子净化效果影响的实测与分析

Measurement and Analysis of Purifying Effect of Negative Ion on Indoor Fine Particulate Matter

空气负离子主要通过静电吸附的方式降低空气中细颗粒物的浓度,而细颗粒物的粒径大小会对负离子的净化效果产生影响。为了研究负离子对室内不同粒径颗粒物的净化效果,以广州市某个典型居民房间为例,通过添加人工污染源并加装负离子净化器,采用相应仪器测试不同粒径颗粒物的浓度变化。并对不同粒径颗粒物浓度变化进行线性拟合。结果表明:不同粒径颗粒物的浓度变化近似为线性,而且负离子对小粒径颗粒物的净化效果更加明显,而负离子在污染严重的空气中存活时间极短,浓度很低。

Air negative ions reduce the concentration of fine particulate matter in the air mainly by electrostatic adsorption,and the particle size of the fine particulate matter will have an impact on the purification effect.In order to study the purification effect of negative ions on indoor particles with different particle sizes,a typical residential room in Guangzhou is taken as an example,by adding artificial pollution sources and anion purifier,to measure with corresponding instruments the concentration changes of particles with different particle sizes.And the linear fitting of the change of particle concentration with different particle size is carried out.The results show that the concentration changes of particles with different particle sizes are approximately linear,and the purification effect of anions on particles with small particle sizes is more obvious,while the survival time of anions in polluted air is very short and the concentration very small.