被动式空气净化器：被动式空气净化器的主要原理是用风机将空气抽入机器，通过内置的滤网过滤空气，主要能够起到过滤粉尘、异味、有毒气体和杀灭部分细菌的作用。而滤网主要分为颗粒物滤网和有机物滤网。
Passive air purifier: The main principle of passive air purifier is that the air is pumped into the machine by a fan and filtered through the built-in filter. It can mainly filter dust, odor, toxic gases and kill some bacteria. The filter is mainly divided into particulate matter filter and organic matter filter.
颗粒物滤网又分为粗效滤网和细颗粒物滤网。这类产品的风机以及滤网的质量决定了空气净化的效果，机器放置的位置以及室内的布局也会影响净化效果。
Particulate filter can be divided into coarse filter and fine filter. The quality of fans and filters of this kind of products determines the effect of air purification. The location of machines and indoor layout also affect the effect of air purification.