Analysis of the classification standards of air purifier filters

　　Common air purifiers on the market generally have three or four layers of filters, and some products also have five or six layers, generally including pre-filters, activated carbon filters, HEPA filters, and formaldehyde removal filters.

　　Pre-filter: The pre-filter is generally placed on the outside, mainly used to absorb some slightly larger particles such as dust, and can also remove some hair, etc. It is usually cleaned once every 3 months, and when the haze is serious, 1 month After cleaning once, some products will have a label that can be cleaned by a vacuum cleaner or directly washed with water, dried and then put into an air purifier for use.

　　HEPA filter: HEPA is an internationally recognized and easy-to-use high filter material. It can effectively inhibit allergens in the air, such as pollen, second-hand smoke, germs, dust, mite dust and other finer particles. Its service life is generally about 3 months. If the air quality in the location is relatively poor, it is recommended to replace it every half month.

　　Activated carbon filter: It can be replaced once every 6-9 pieces, and it can also be regularly taken out and exposed to the sun to remove odor and prolong its service life. Of course, the longer it is used, the weaker its purification ability will be, so it must be replaced in time to avoid secondary pollution caused by its working in a saturated state.

　　Washable deodorizing filter: This filter can generally be washed with clean water. Regular cleaning can restore its deodorizing performance. This is very good for pets at home. It can effectively remove some sweat odors, pet odors, etc. Unpleasant smell. If the air quality is good, it can be cleaned once every 3 months, and if the air quality is poor, it can be cleaned once every two weeks.

　　Formaldehyde removal filter: Now air purifiers are not only used to deal with smog, but more importantly, air pollutants - formaldehyde. The formaldehyde filter can decompose formaldehyde and release carbon dioxide and water. If you feel that the indoor formaldehyde exceeds the standard, it is recommended to replace it at least once every two months.

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