Based on January 28, 2020, the national WeiJianWei and published by the state administration of traditional Chinese medicine of the new type of coronavirus infection pneumonia diagnosis and plan (trial) fourth edition description: virus is sensitive to ultraviolet light and heat, that is to say: ultraviolet rays can kill a new coronavirus (2019 – nCoV). But ultraviolet ray also points to several kind of band, what kind of uv germicidal lamp use how long can effectively kill coronavirus?
The classification of ultraviolet ray
Uv sterilization effective wavelength range can be divided into four different wavelengths: UVA (400 ~ 315 nm), UVB (315 ~ 280 nm), UVC (280 ~ 200 nm) and vacuum uv (200 ~ 100 nm). Which can reach the surface of the earth through the protective ozone layer, and the clouds part only UVA and UVB rays. In terms of sterilization speed, UVC in microbial absorption peak area, but by destroying microorganisms within 1 s DNA structure kill viruses and bacteria, and because UVA and UVB rays in microbial absorption peak, sterilization speed is slow, often take hours to kill bacteria.

So it is often said that ultraviolet germicidal lamp is UVC germicidal lamp, 240 nm – 280 – m band ultraviolet ray, 253.7 nm peak is the most effective antibacterial sterilization bands.
Ultraviolet radiation sterilization principle
Uv aseptic disinfection works by destroying microbial cells DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), the molecular structure of the killing of growing cells and (or) cell regeneration, the effect of antibacterial sterilization.
Belong to a single chain are all coronavirus RNA virus. During the period of SARS, the intensity is greater than 90 (including W/cm2 UV irradiation of ultraviolet light – C band 30 minutes, can kill the SARS virus. The new type of coronavirus as the typical structure of RNA (ribonucleic acid), plenty of ultraviolet radiation is known to inhibit new coronavirus (2019 – nCoV) effective means.
Ultraviolet germicidal lamp use
Understand the ultraviolet germicidal lamp can effectively kill the new coronavirus, we can making effective use of ultraviolet lamp, prevention and control the outbreak.