Introduction to the principle of ultraviolet germicidal lamp disinfection

by:ALLTOP      2021-06-05


Ultraviolet germicidal lamp wants to achieve sufficient disinfection, it needs to maintain sufficient use time. Studies have shown that after 5 minutes of irradiation, it is an effective sterilization and disinfection time. When it reaches 30 minutes, it can achieve the effect of daily disinfection; when the irradiation time reaches 60 minutes, it can kill most of the bacteria and other microorganisms in the air. Ultraviolet sterilization is a purely physical disinfection method without secondary pollution, so it is widely used in various fields.

The ultraviolet germicidal lamp has the same luminescence principle as a fluorescent lamp. The mercury atoms in the lamp tube are excited to produce the characteristic spectrum of mercury. Low-pressure mercury vapor mainly produces 254nm and 185nm ultraviolet rays. The germicidal lamp tube is made of transparent violet glass or quartz glass So that the ultraviolet rays are transmitted through the lamp tube. Ultraviolet rays with a wavelength of 254nm are easily absorbed by objects and act on the genetic material DNA of organisms, causing DNA damage and bacterial death.

Ultraviolet germicidal lamps can be divided into three types according to their appearance: double-ended lamps, single-ended lamps, and self-ballasted lamps. According to whether they contain ozone or not, they can be divided into ozone and ozone-free. After long-term research and testing, the germicidal lamp tube made of quartz glass has more advantages than the germicidal lamp tube made of high silica glass.

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