Ultraviolet germicidal lamp actually belongs to low-pressure mercury lamp. Low pressure mercury lamps use low mercury vapor pressure (
How does the ultraviolet sterilization lamp of the ultraviolet sterilizer sterilize?
The ultraviolet germicidal lamp does not need to be converted into visible light, and the wavelength of 253.7nm can play a good germicidal role. This is because the absorption of light waves by cells is regular, and the ultraviolet absorption at 250~270nm is the largest. The absorbed ultraviolet rays actually act on the genetic material of cells, that is, DNA, which plays a photochemical role. The energy of ultraviolet photons is absorbed by the base pairs in DNA, which leads to the variation of genetic material and leads to the immediate death or inability of bacteria to reproduce.
Whether the ultraviolet lamp tube of ultraviolet sterilizer can replace the ultraviolet curing lamp;
No, the ultraviolet sterilization tube of the ultraviolet sterilizer is a low-pressure mercury lamp for sterilization, and the wavelength is mainly 254 nm. However, some high-pressure mercury lamps in the UV lamp market have added some metal halide to improve their characteristics, making their main peak become 365nm, which is used for photocuring. This is one, and the other is that the power density of the ultraviolet curing lamp will be very high, which is beyond the reach of the ultraviolet disinfection lamp tube of the ultraviolet sterilizer. Generally, it may be hundreds or thousands of times.
The ultraviolet wavelengths of the ultraviolet sterilization lamp and the ultraviolet curing lamp of the ultraviolet sterilizer are not only different in wavelength, but also different in ultraviolet intensity. Ultraviolet sterilization tubes are divided into low-pressure tubes and medium-pressure tubes. The ultraviolet light sources used for curing are several hundred watts, and a lamp tube is only a few tens of watts, so the curing time is much longer when the power difference is much.
The price difference between ultraviolet germicidal lamp and ultraviolet curing lamp is quite large, and the price of ultraviolet germicidal lamp is generally higher than that of ultraviolet curing lamp.
Ultraviolet disinfection tubes are mainly used for air disinfection, water disinfection and surface disinfection. According to different disinfection objects, it is usually divided into sewage ultraviolet sterilizer, drinking water ultraviolet sterilizer, reclaimed water ultraviolet sterilizer and air ultraviolet sterilizer. Ultraviolet curing lamp tube is mainly used for ultraviolet curing and photochemical reaction of glue and ink.