Air purifier

The utility model discloses an air purifier, it includes casing, air inlet, gas outlet and controlling means, and the casing is cuboid thin layer structure, and the inboard of upper and lower air inlet all is equipped with the dust removal filtering layer, and the inboard of dust removal filtering layer is equipped with activated carbon adsorption layer, and the activated carbon adsorption layer inboard is equipped with light catalyst filtering layer, and smooth catalyst filtering layer's inboard is equipped with the ultraviolet lamp from top to bottom. The utility model discloses an advantage: adopting the design of cuboid thin layer, installing in the blackboard lower extreme, the dust that the production was write to the chalk gets into from the upper portion air inlet, and the raise dust that produces of walking up and down is got into by the lower part air inlet, the assurance can timely complete collection by contaminated air, adopt dust removal filtering layer + activated carbon adsorption layer + ligh