Air purifiers are usually equipped with multiple layers of filters inside, which filter out particles of different sizes through different layers of filters. At the same time, the use of adsorbents to adsorb harmful gases, electrochemical principles to decompose harmful substances, ultraviolet sterilization, and other methods can comprehensively improve the air purification effect. Different filters of household air purifiers have different filtering effects on different types of pollutants. For example, HEPA filters have better filtering effects on particulate matter, while activated carbon filters have better adsorption effects on harmful gases.

Integrated air purifier: Combining multiple purification technologies such as HEPA filters, activated carbon, negative ions, etc., it can comprehensively remove various pollutants from the air. Some products are equipped with intelligent monitoring systems and automatic adjustment functions, which can automatically adjust the working mode according to indoor air quality. Due to the integration of multiple purification technologies, the price of integrated air purifiers is usually higher. Multiple purification technologies require different maintenance methods, increasing the complexity of their use.