Central air conditioning, air-purifying technology used broadly divided into the following categories, they have their own strengths, and with advances in technology continue to improve. 4. Nano photocatalyst nano technology is the use of titanium dioxide photocatalyst produce hydroxyl free radicals and reactive oxygen has an oxidation decomposition under UV irradiation, were potent bactericidal. Its combination of common and other formaldehyde, ammonia and benzene having a certain degradation. But only in the titanium dioxide particles as small as true nanoscale state, it can play an effective role. At this time the physical and chemical properties of titanium dioxide will change dramatically central air disinfection devices offer a whole huge amount of surface area will increase, you can make the passing air into contact with the surface of titanium dioxide sufficient to achieve sterilization purposes. Wei, a VBK-G-duct air purification equipment product functions and features ◆ patented semiconductor disinfection purification technology: by the National Testing Center air conditioning central air disinfection device, and drag only 6.3Pa, in line with <> standards; ◆ high efficiency disinfection : patented technology: The Chinese Center for Disease Control and Prevention, one natural bacteria killing efficiency of 72%, continuing the cycle kill rate of 99%, in line with national health and family planning committee "disinfection technical specifications"; 1. The electrostatic air purification equipment under the influence of high voltage power supply, central air conditioning disinfection unit principle, strong electrostatic field generating large number of charged ions. By air, the solid particles are adsorbed electrode of opposite polarity, bacteria, fungi, viruses and other microorganisms were electrolysis charring and death. Electrostatic air purification systems Schematic as follows: 1) flat electrical wire technique is to form a strong electrostatic field disinfection central air-conditioning unit price use electric wire, a first stage dust at high energy ionizing electric field ionization wire (operating voltage greater than 8000V) The second phase is adsorbed on the charged particle electrostatic precipitator plates (operating voltage greater than 4000V). Silk long time tablet applications Electrostatic Precipitator technology, mature technology, air handling field at home and abroad widely used.