Air purifier, also known as "air cleaner, air purifier, refers to adsorption, decomposition or transformation of various air pollutants (generally include such as dust, pollen, smell, formaldehyde decoration pollution, bacteria, allergies, etc.), effectively improve the air cleanliness of products, mainly to clear the indoor air pollution of household and commercial air purifier.

Air filter is the air filter device, generally used in cleaning workshop, clean workshop, laboratory and clean room, or for electronic machinery communication equipment, etc.. There are primary filters, filter, sub - efficient filters, efficient filters, etc.. Various models have different standards and use efficiency.

This is the general situation, the former is mainly used for home and office use, which is mainly used for workshop, workshop, laboratory, hospital, etc., the former mainly through chemical reaction is the human body has the material decomposition of toxic substances, the latter is achieved by filtering dust and other methods.