From a functional point of view, the type of air purifier without smog does not mean it is useless

　　In terms of function, air purifiers are mainly divided into the following common types.

　　1. Basic purification type-the main functions include filtration of airborne particles, removal of odors, and decoration pollution control. The main principle is to adopt multiple filters, including larger particle filters, fine particle air purifiers (including PM2.5 or even smaller) filters, activated carbon filters, etc., characterized by mature technology, strong practicability, and maintenance low cost.

　　2. Decoration pollution control type-the basic technical principle is still the use of filters, but it is better in terms of pollution control. In addition to activated carbon technology, it will also make the air duct purification device use some more professional adsorbents. These products not only have a basic air filtration function, but also have a more professional function of removing harmful substances. Due to the replacement of special adsorbents, the maintenance and use costs of such products are relatively high.

　　3. Disinfection and sterilization type-in addition to the basic filter of the air duct purifier, some technologies such as ozone inactivation, electrostatic inactivation, ultraviolet light, and negative ion adsorption will also be used to kill bacteria and viruses in the air. The cost of the product and the price are relatively relative. Higher, the maintenance cost will not increase too much.

　　4. Fresh air ventilation type-such as fresh air blower, is essential in the purification system of central air conditioning air conditioning box and office building ventilation system, and it can also be seen in some high-end residences. We can also regard this type of product as a more professional air purifier.

　　Maybe facing a home environment that you think is clean, you may not think that your indoor air is unclean and safe with a ceiling-mounted purifier. In fact, there are more than 900 types of indoor air pollutants, which are mainly divided into three categories:

　　(1) Gas pollutants. The main sources are home decoration and building furniture materials, fuel burning, cooking, second-hand smoke

　　(2) Microbial contaminants. Such as allergic reaction plasma air purifiers, viruses, fungi and microorganisms that are easy to breed in humid places in the room.

　　(3) Inhalable particulate matter (PM10 and PM2.5). Source outdoor, fuel burning, cooking, second-hand smoke.

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