As a reliable air purification device, the air purifier can absorb, decompose or transform various air pollutants (generally including dust, pollen, odor, formaldehyde, bacteria and other substances), effectively improving air cleanliness. At present, although the names, types and functions of air purifiers on the market are different, they can be traced back to the source. From the principle of air purifiers, they can be divided into three types: passive purification (filter screen purification), active purification (no filter screen type), and dual purification (active purification + passive purification).

Introduction to the principle of passive purification (filter purification)

Operation principle: use the fan to draw the air into the machine and filter the air through the built-in filter screen, which can mainly filter dust, odor, toxic gas and kill some bacteria. The filter screen also includes dust collection filter screen, formaldehyde filter screen, deodorization filter screen and HEPA filter screen. HEPA filter screen is the one with relatively high cost, which can decompose toxic gases and sterilize, and can effectively inhibit secondary air pollution.

Represented by European brands such as Honeywell, such products have the advantages of large fan power and large air intake, which can be used for large houses; The disadvantage is that the replacement time of filter screen is short and the use cost is high.

Introduction to the principle of active purification (no filter screen type)

The fundamental difference between the principle of the active air purifier and the passive air purification principle is that the active air purifier gets rid of the restrictions of the fan and filter screen. Instead of passively waiting for the indoor air to be pumped into the purifier for filtration and purification, it effectively and actively releases the purification and sterilization factor into the air, and achieves the effect of air purification in all corners of the room through the characteristics of air diffusion.

Introduction to the principle of dual purification (active purification + passive purification)

This type is a more mainstream form at present, which is the dual purification of the combination of filter screen and sterilization technology. This kind of air purifier can comprehensively remove dust, odor and toxic gases in the air. In addition, some purifiers also have humidification function, which can not only wet the air, but also reduce indoor air pollution.

When purchasing air purifier products, users should not only choose the appropriate products according to the room type and their own needs, but also pay attention to the service life of the internal filter element of the air purifier. Generally, the filter element with long service life and easy cleaning can reduce the later maintenance cost of the air purifier.