Is the air purifier useful? What is the principle?

　　When it comes to air purifiers, everyone must be familiar with them. When it is necessary to prevent haze and remove indoor air pollution, many people will think of air purifiers first. But at the same time, some people are skeptical about its actual effect. So, is the air purifier useful? Do we need to use air purifiers? In this article today, Di'an Xiaobian will popularize the role and disadvantages of this type of product from the principle of air purifiers.

　　What is the principle of air purifiers?

　　Is the air purifier useful? Is it really necessary to use an air purifier? When you understand the principle of air purifiers, you will have your own answer.

　　There are many different types of air purifiers on the market. There are two main principles of air purifiers, one is passive purification principle and active purification principle.

　　Passive air purifiers are mainly filter purification. The machine consists of a fan, a fan, a filter, etc. The working principle is: the fan and the fan circulate the indoor air. After the polluted indoor dirty air passes through the machine filter, various pollutants are removed or adsorbed, thereby filtering dust, odor, toxic gases and killing some bacteria. The air purification effect of this type of air purifier is mainly determined by the quality of the fan and filter. In addition, the location of the machine and the indoor layout will also affect the air purification effect.

　　Air purifier filters include physical filtration HEPA high-efficiency filters, activated carbon filters, etc., as well as electrostatic dust collection filters. Physical filters have a limited service life and must be replaced when they expire; electrostatic dust collection filters can be used for a long time, but some styles are prone to ozone pollution.

　　Active air purifiers get rid of the limitations of fans and filters. Instead of pumping indoor air into the purifier for filtration and purification, they actively release purification and sterilization factors into the air. In principle, through the characteristics of air diffusion, it reaches every corner of the room to purify the air without dead ends. This type of purification technology mainly includes negative ion technology, plasma technology, photocatalyst technology, etc. The most worrying problem for users of active air purifiers is the problem of excessive ozone release.

　　Some air purifiers are based on a composite purification principle, that is, combining passive purification technology with active purification technology.

　　The principles of air purifiers are as described above. The mainstream products on the market are passive air purifiers that use physical filters for purification. Although there is a cost issue of regularly replacing the filters, it is safer to use and the product quality is more guaranteed.

　　No matter what the principle is, the purpose of air purifiers is mainly to purify indoor air and remove pollutants such as dust, allergens, bacteria, etc. in the air, including PM2.5. Most air purifiers can accomplish this task.