空气净化器长效净化气态污染物评价方法研究

Research on Long-lasting Purification Evaluation Method for Gaseous Pollutants by Air Cleaners

在现行国标GB/T18801-2022《空气净化器》基础上,开发了低浓度单成分甲醛加载模型和低浓度混合成分(甲醛和甲苯)加载模型,通过对三种加载方式的加载量、加载前/后洁净空气量(CADR)变化率的分析,比较三种加载方式对空气净化器长效净化气态污染物性能的影响。结果表明,使用同一空气净化器,按现行国标评价,当加载量达到指定量时,甲醛CADR仅衰减6.2%。而使用本文两种长效评价方法,随着长时间处理低浓度污染物,净化器的甲醛CADR指标会明显下降,且污染物成分越复杂,甲醛CADR下降越明显。因此采用低浓度混合成分(甲醛和甲苯)加载模型,测试条件更加严苛,更贴近真实使用场景,故能够准确评价空气净化器真实性能,为相关测试方法及标准的制定提供借鉴。

Based on the current national standard GB/T 18801-2022'air cleaner,'we have developed models for loading low-concentration single-component formaldehyde and low-concentration mixed-component(formaldehyde and toluene)pollutants.By analyzing the amount of pollutants loaded using three different methods and the change in clean air delivery rate(CADR)before and after loading,we compare the effects of these three loading methods on the long-term purification performance of air cleaner against gaseous pollutants.Experimental results demonstrate that with the same air purifier and under the current national standard evaluation,when the specified loading amount is reached,the formaldehyde CADR only attenuates by 6.2%.However,using the two long-term evaluation methods proposed in this study,the formaldehyde CADR of the air purifier will significantly decrease over time when treating low-concentration pollutants,and the more complex the pollutant composition,the more noticeable the reduction in formaldehyde CADR.Therefore,adopting the model for loading low-concentration mixed-component(formaldehyde and toluene)pollutants imposes stricter testing conditions that are more representative of real-world usage scenarios.Consequently,it accurately assesses the true performance of air cleaner.This experiment provides valuable insights for the formulation of relevant testing methods and standards.