Introduction and Application of UV Germicidal Lamp
The UV germicidal lamp is actually a low-pressure mercury lamp. Low-pressure mercury lamps are excited by a lower mercury vapor pressure (<10-2Pa) to emit ultraviolet light. There are two main spectral lines: one is 253.7nm wavelength; the other is 185nm wavelength, both of which are naked to the naked eye. Invisible ultraviolet light.
The germicidal lamp does not need to be converted into visible light, and the wavelength of 253.7 nm can play a good bactericidal effect. This is because the absorption line of the light wave of the cell has a regularity, and the ultraviolet ray at 250-270 nm has the largest absorption and is absorbed. Ultraviolet light actually acts on the genetic material of the cell, DNA, which acts as an actinic act. The energy of the ultraviolet photon is absorbed by the base pairs in the DNA, causing the genetic material to mutate, causing the bacteria to die or not to breed. the goal of.
UV disinfection and sterilization is widely used in hospitals, schools, nurseries, cinemas, buses, offices, homes, etc. It can purify the air, eliminate the musty smell, and can also produce a certain amount of negative oxygen ions, UV-sterilized rooms, The air is especially fresh. In public, UV disinfection can prevent some germs from spreading through the air or through the surface of the object. Long-life UV germicidal lamps are of great significance in water disinfection and environmental protection projects. Water disinfection equipment, such as pure water systems, generally operate at 24 hours. The life and reliability of UV germicidal lamps are required to be high if the lamp life is short. The replacement of the lamp is costly and inconvenient.