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Ultraviolet sterilization of air conditioning duct

by:LiangYueLiang     2019-12-10
Ultraviolet sterilization and disinfection of air-conditioning duct. After cleaning the air-conditioning duct, the next disinfection work will be carried out. In fact, the effect of disinfection with chemical agents is also good, however, due to certain limitations in disinfection of chemical agents, chemical agents volatilize into the air and are at risk of pollution. Therefore, the treatment method using ultraviolet disinfection lamp is a safe way. At present, ultraviolet disinfection and ozone disinfection are the physical disinfection methods that are widely used and mature in air conditioning duct cleaning. 1. Characteristics and principles of ozone disinfection 1) Performance characteristics: ozone, molecular formula O3, is an allotypic body of oxygen, is a high-energy form of oxygen, and has a fishy smell of grass. Ozone is easy to decompose and has extremely high oxidation. It is the strongest oxidant discovered by human beings and can be safely applied. Its sterilization process belongs to biochemical oxidation reaction. Ozone decomposes glucose oxidase in bacteria and directly acts with bacteria and viruses, destroying their cell walls and DNA. RNA--- It has strong effects on bacterial propagules, spores, viruses and fungi. Ozone can also eliminate peculiar smell in the air. Ozone has strong oxidation, ozone can oxidize many metals, aluminum, zinc, lead and ozone contact will produce oxidative corrosion, but ferrochrome alloy containing 25% Cr (Stainless steel)Basically, it will not be corroded by ozone. Ozone has the greatest corrosion effect on ordinary rubber, so attention should be paid to the use occasions in application. 2) Generation mode: at present, the most economical and technically mature way to generate ozone is corona discharge, I . e. strong electron emission is generated between the inner and outer electrodes of the electric vacuum tube by using the action of a high voltage electric field, ionize air. The oxygen in the air (O2)Convert to ozone (O3)At the same time, a certain amount of negative ions are generated. However, ozone generators used for air disinfection mostly use ceramic sheet high-frequency discharge mode, which has the advantages of simple structure, reliable performance, low operation cost and flexible adjustment. 3) Working Principle of ozone air disinfection: the circulating air of the air conditioning purification system is used as the ozone carrier to spread to the working and production environment of the whole clean area to achieve the purpose of sterilization, at the same time, it has the effect of killing Miscellaneous bacteria on the air conditioning purification system. 2. Characteristics and principle, characteristics and application mechanism of ultraviolet disinfection: C- band electromagnetic waves generated by ultraviolet lamps are used to kill microorganisms. Ultraviolet rays are divided into A, B and C (Also known as disinfection UV)D (Also known as vacuum ultraviolet) Four bands, A band 320nm ~ 400nm, B band 275nm ~ 320nm, C- band 200nm ~ 275nm, vacuum ultraviolet 100nm ~ 200nm. C- band ultraviolet disinfection technology can quickly kill bacteria and viruses on the surface of air conditioning coil, air duct and filter. The equipment is installed in the air-conditioning box to ensure that the air blown from the air conditioner is disinfected. C- band ultraviolet rays can degrade major indoor harmful gases such as formaldehyde and benzene. The negative ions generated can make the air fresh. Energy saving. C- band ultraviolet rays can avoid forming microbial films on the surface of the surface cooler and improve heat exchange efficiency. No pollution. Unlike disinfection with chemicals, there are residues that produce secondary pollution. Less investment, low operating cost, easy installation, no damage to the original air conditioning system.
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