Indoor air purifiers

The utility model relates to an indoor air purifier which is suitable to the air purification in the meeting room, in the office or in the living room. It adopts a tightly sealed laminated structure. The following parts are equipped from an air inlet to an air outlet in turn: an air inlet, a prefiltration cloth, a low temperature plasma catalyst case which is provided with filament plate type structure, a photocatalysis plate which uses a metallic net, a honeycombed plate, foamed nickel and an activated carbon plate, etc. as a carrier on which a TiO 2 photocatalyst is loaded, an activated carbon filter element which adopts activated carbon or activated carbon fiber treated by KMnO4, MnSO4, etc. as an active solid with mixing a CO atmospheric temperature accelerant, a high efficiency filter provided with a collapsible non-diaphragm structure which uses glass cloth or polypropylene nonwoven as a filtering medium and a centrifugal fan on which an air outlet is equipped. The indoor air purifier can not generate other harmful substances when it is used for eliminating the indoor suspended solid granules, pathogenic bacteria and harmful gas. The indoor air purifier can purify many kinds of contaminants and the cleaning efficiency is high with few accessory substances.