Automotive air conditioning systems cleaning and disinfection of one machine [five] decomposition of harmful gases effect: the use of the unique light photocatalyst catalytic decomposition of formaldehyde, benzene, ammonia, radon, TVOC and other harmful gases by natural light oxidation. Produce oxygen anions: In the light energy, electronics and attached to the surface of the oxygen generated from the photocatalyst produce large amounts of oxygen ions after the reduction reaction, drifted through the air circulating ambient air, creating a subtropical rainforest as like fresh air. Sterilization: irradiation of light, the photocatalyst surface strong oxidizing hydroxyl radicals and superoxide anion radical, the decomposition of organic matter into low molecular contact, while disinfecting bacterial endotoxin decomposition. Deodorant: decomposition smell can be strong sources with activated carbon does not have the function of bacterial decomposition. Mildew: surface mold mildew because of the relationship, according to anti-bacterial sterilization mechanism, so that there is no breeding mold space.