The germicidal lamp is actually a low-pressure mercury lamp. The low-pressure mercury lamp uses a lower mercury vapor pressure (<10-2Pa) to be excited to emit ultraviolet light. There are two main emission spectral lines: one is 253.7nm wavelength; the other is 185nm wavelength, both of which are naked eyes Invisible ultraviolet rays.

    The germicidal lamp does not need to be converted into visible light. The wavelength of 253.7nm can play a good sterilization effect. This is because the cells have a regularity in the absorption spectrum of light waves. Ultraviolet rays at 250~270nm have greater absorption and are absorbed. The ultraviolet light actually acts on the genetic material of the cell, which is DNA. It plays a kind of actinic effect. The energy of ultraviolet photons is absorbed by the base pairs in the DNA, causing the genetic material to mutate, causing the bacteria to die immediately or unable to reproduce their offspring. The purpose of sterilization.

    Precautions

    Because ultraviolet rays can kill cells, be careful not to directly irradiate human skin, especially human eyes, when sterilizing ultraviolet rays. Do not look directly at the lamp tube when the ultraviolet germicidal lamp is on. Because short-wave ultraviolet rays do not pass through ordinary glass, wear glasses Can avoid eye injury. If the eye is accidentally injured, it is not a major problem in general. It is just like being burned by the sun. Serious eye drops or human milk can be used to help recover. Do not use ozone lamps when there are people. High ozone concentration is harmful to people.

    1. Pay attention to shielding the valuable indoor paintings and calligraphy to prevent oxidation and discoloration under long-term ultraviolet radiation.

    2. Cut off the power when cleaning, use a clean soft cloth or alcohol to wipe gently, avoid using gasoline and other organic solvents.

    3. Prevent children from playing and touching, filled with mercury vapor, which is toxic.

    4. Open windows for ventilation after disinfecting the room.

    5. Ultraviolet rays will cause burns to eyes and skin. People and animals will leave the scene within 10 seconds.

    6. It only has an effect on specific viruses, microorganisms and bacteria, but has no effect on insects, cockroaches, fleas and other organisms.

    Main purpose of germicidal lamp

    Ultraviolet disinfection has a wide range of uses, such as hospitals, schools, nurseries, cinemas, buses, offices, homes, etc., it can purify the air and eliminate musty odors. It can also produce a certain amount of negative oxygen ions. The rooms that have been sterilized by ultraviolet rays can be used for disinfection. The air is very fresh. In public places, ultraviolet disinfection can prevent some germs from spreading through the air or through the surface of objects. The application of long-life ultraviolet germicidal lamps in water disinfection and environmental protection projects is of great significance. Water disinfection equipment such as pure water systems generally operate for 24 hours. The life and reliability of ultraviolet germicidal lamps are required to be high. If the lamp life is short , The cost of replacing the lamp tube is high, and it is very inconvenient.

    With the changes in the market and the improvement of customer requirements for products, all UV lamp manufacturers are now developing long-life lamps. The cold cathode series of UV lamps are developed with outer diameters of 4, 5, 6, 10, and 12mm. To replace the hot cathode series of ultraviolet lamps.