所谓空气净化器是指能够吸附、分解或转化各种空气中的污染物，有效提高室内空气清洁度的产品。空气净化器从工作原理来看，主要有三种：被动式、主动式、主被动混合式。
The so-called air purifier is a product that can absorb, decompose or transform various air pollutants and effectively improve indoor air cleanliness. According to the working principle of air purifier, there are three main types: passive, active and passive.
其主要的功能是去除空气中的颗粒物，包括过敏原、室内的PM2.5等，同时还可以解决由于装修或者其他原因导致的室内、地下空间、车内挥发性有机物空气污染问题。在居家、医疗、工业领域均有应用，居家领域以单机类的家用空气净化器为市场的主流产品。
Its main function is to remove particulate matter in the air, including allergens, indoor PM2.5, etc. At the same time, it can also solve the indoor, underground space, vehicle volatile organic matter air pollution problems caused by decoration or other reasons. It has been applied in the fields of home, medical treatment and industry. The main products in the field of home are single-machine household air purifiers