Classification of Air Purifiers
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An air purifier is a device used to purify indoor air, which can remove pollutants such as dust, pollen, smoke, bacteria, viruses, etc. from the air. According to different purification technologies and designs, air purifiers can be classified into various types. Here are some common types of air purifiers:
1. HEPA filter type:
HEPA (High-Efficiency Particulate Air) filters, especially true HEPA, can capture particles as small as 0.3 microns, with an efficiency of over 99.97%, making them ideal for removing dust, pollen, and other small particles from the air.
2. Activated carbon filter type:
Activated carbon filters are mainly used to adsorb odors and volatile organic compounds (VOCs), such as smoke and harmful gases released from decoration materials.
3. Electrostatic filter type:
High-voltage static electricity is used to adsorb particulate matter in the air, very effective
4. Photocatalyst type:
Using specific wavelengths of ultraviolet radiation to irradiate catalysts (usually titanium dioxide TiO₂) to decompose harmful substances in the air and produce bactericidal and disinfecting effects.
5. Ozone generator type:
By generating ozone to oxidize harmful substances in the air, this type of purifier requires special attention to safety when used. Excessive ozone harms human health.
6. Negative ion generator type:
By releasing negative ions to neutralize positive ions in the air, particulate matter condenses and settles, thereby purifying the air.
Composite air purifier:
7. Combining one or more of the abovementioned technologies can comprehensively address various air pollution problems.
Each type of air purifier has its applicable scenarios and technical characteristics, and the selection should be based on actual needs and personal health conditions. In the next article, I will analyze the advantages and disadvantages of each type in detail.
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