Photocatalytic technology 1) Semiconductor technology is catalytic TiO2 or CdS, WO3, ZnO, ZnS, Fe2O3, SnO2 as the typical semiconductor photocatalyst. Having a redox principle of central air conditioning air disinfection device from the catalytic properties of the semiconductor, optical and electrical work while at the same time, the light irradiation catalyst layer on the semiconductor, electrons are potential can transition to the conduction band, and the role of the gap by the electric force is adsorbed reducing the migration of voids. Optical and electrical separation through several tests to verify: electric field plates coated with a semiconductor catalyst, the electric field is presented loose table after cleaning dust with a vacuum cleaner or an electric field into a neutral solution, 1min out, field surface dust quickly dissolved in the aqueous solution, washed clean; without catalytic coated semiconductor field, the role of static electricity by the mirror, dust firmly attached to the electric field, it is difficult to clean. Combined optical and electrical separation principle of innovation, break the electrostatic field for many years confused cleaning difficult problem, but also realize the semiconductor surface hole - electron pairs of composite and separation, greatly improves the catalytic effect of the semiconductor. It is evident from the cleaning process, for the treatment and recycling of organic pollutants with a central air-conditioning air disinfection device, the potential benefits of technological innovation hospital, promote technological progress and industrial technology, purification of organic pollutants. Wei, a central air cleaner is a semiconductor used in health technology: Photocatalytic available sunlight as an energy source to activate the semiconductor catalyst to drive oxidation - reduction reaction, and there is no loss of the semiconductor catalyst during the reaction. Sterilization complete: Semiconductor purification technology can directly organic pollutants in the air, completely oxidized to non-toxic materials, without leaving any secondary pollution, now widely used in the activated carbon adsorption method does not decompose pollutants central air conditioning air disinfection device parameters, simply transfer pollution. Semiconductor disinfection purification technology has strong oxidation characteristics of certain ozone is difficult to oxidize organic matter such as carbon tetrachloride, chloroform, hexachlorobenzene, can effectively be decomposed, so difficult to degrade organic matter has a particularly good effect, effective oxidant photocatalytic oxidation of hydroxyl radicals is higher than the common ozone, hydrogen peroxide, potassium permanganate, hypochlorous acid and the like. Long life: theoretically, semiconductor disinfection purification devices life is infinitely long.