Wei, a socially beneficial central air purification device (1) effective in reducing nosocomial infections, in exchange for a huge loss of lives and property return air air purifier indoor air pollution, indoor environmental protection, the benefit of human society. (2) provide hospitals with a new air sterilization equipment, to improve the treatment of hospital level of care to create conditions under sterile conditions requiring physical therapy, rehabilitation of patients to bring the Gospel. (3) improve pharmaceutical, food factory, deli, beauty salon, entertainment air quality, in order to meet health standards. (4) For the file room, library, computer room effectively store and protect valuable or priceless variety of information, such as CD-ROM, disks, and film and so on. (5) to completely solve the pollution of indoor air-conditioned environment, to prevent air conditioning disease breeding. To protect computers and other modern office facilities, especially Eliminated smoking environment purification, so that millions of passive smokers immune. Installation: Wei innovation a central air-conditioning air purification device! ! Application of the principle of optical and electrical technology ① return air air purifier principle, while producing energy and power, when the semiconductor layer by dual-energy effects, electronic transitions from the semiconductor layer can return air air purifier companies gap by power the role will be adsorbed in electric field, so as to reduce the gap and electron recombination opportunities. Test Report Verification: natural bacteria in indoor air sterilization rate of 99.81 percent extinction, optical and electrical data demonstrate that binding can improve the catalytic efficiency of the semiconductor. Optical and electrical combination of theoretical innovation law, breaking the unrealized dream of scientists for many years. ② The basic theory of electrostatic technology, inventing a semiconductor ionization device, the device is coated with a layer of a semiconductor in a protective film, electrostatic device can effectively solve difficult cleaning problems, and improve product life, reduce cost of return air air purifier Quotes, also user-friendly cleaning process. ③ Applied Optics lens amplification principle, invented a mirrored funnel amplification reactor, ultraviolet irradiance meter test probe device to detect the radiation intensity value 1800μW / cm2, according to the supplier to provide the detection luminance value 70μW / cm2, ( same 30W UV lamps only) compared to the data, 25 times.