The inlet (1) and the air exit (2) and the inlet (1) and it has with the air flare part which has, the air exit (2) between can provide one reaction surface component (3) at least in the air flare part, one ultraviolet ray illuminant (4) is arranged at least in the air flare part, the reaction surface component the air flare part is almost arranged in the whole, the air purification system especially on vehicle is proposed.吸気口(1)と、排気口(2)と、吸気口(1)と排気口(2)の間にある空気誘導部とを備え、空気誘導部に少なくとも1つの反応表面部材(3)が設けられ、空気誘導部に少なくとも1つの紫外線光源(4)が配置され、反応表面部材が空気誘導部のほぼ全体に配置される、特に車両用の空気清浄システムを提案する。