选择空气净化器的话一般要选择价格差不多的才可以，千万别贪图便宜，要知道便宜没好货，好货不便宜的道理！而空气净化器的原理吸附式的，可以吸入颗粒物、PM2.5以及花粉、毛发等，这种一般是使用初效滤网以及高效滤网进行过滤的，通常高效滤网就是HEPA滤网，目前公认比较好的！当然有些滤网会加入活性炭等，这样可以搞定一些气态污染物，例如甲醛或者苯等！如果功能在强大一些的，那么带有分离甲醛的功能，可以通过催化剂来分解甲醛等！不过功能越多，那么价格肯定是越贵的
If you choose an air purifier, you should generally choose one with the same price. Don't be greedy for cheap. You should know that cheap goods are not good goods, and good goods are not cheap! The principle of air purifier is adsorption type, which can inhale particulate matter and PM2 5 and pollen, hair, etc. this kind of filter is generally filtered by primary effect filter screen and high-efficiency filter screen. Usually, the high-efficiency filter screen is HEPA filter screen, which is generally recognized as better at present! Of course, some filters will add activated carbon, which can deal with some gaseous pollutants, such as formaldehyde or benzene! If the function is more powerful, it has the function of separating formaldehyde, which can be decomposed by catalyst! However, the more functions, the more expensive the price must be