What is the difference between ultraviolet germicidal lamp and ordinary fluorescent lamp?

by:Tepro     2021-05-09
What is the difference between an ultraviolet germicidal lamp and an ordinary fluorescent lamp? The difference between an ultraviolet germicidal lamp and an ordinary fluorescent lamp is that the germicidal lamp does not need to convert the excited ultraviolet rays into visible light, and the wavelength of 253.7nm ultraviolet rays can achieve good sterilization. effect. The absorption spectrum of light waves by cells is regular. Cells have the maximum absorption of ultraviolet light with a wavelength of 250~270nm. What is the effect of the ultraviolet light absorbed by the cells on the cells? It can act on the genetic material of the cells. DNA, in this way, will have a kind of actinic effect on the cell. The energy of ultraviolet photons is absorbed by the base pairs in the DNA of the cell, which will cause the genetic material in the cell to undergo a great change. When X-rays are irradiated, cells will become cancerous. Ultraviolet rays will cause bacteria to die immediately or unable to reproduce their offspring. Under such effects, the purpose of sterilization can be achieved. Although the principle of the ultraviolet germicidal lamp is the same as that of fluorescent lamps and energy-saving lamps, the materials used are different. The ordinary glass used in ordinary fluorescent lamps, but such materials cannot make the 253.7nm ultraviolet light penetrate, so The ultraviolet germicidal lamp cannot use ordinary glass. So what material should be used to make the ultraviolet light transmit the most? That is quartz glass. This material has a very high ultraviolet transmittance, which can reach 90%. Therefore, quartz glass is the best material for germicidal lamps. The performance and thermal expansion coefficient are very different from ordinary glass. Therefore, the sealing of ultraviolet germicidal lamps cannot use the highly automated round sealing method used in the manufacture of ordinary fluorescent lamps. It is necessary to use the technology with high production and manufacturing technology. The price of UV germicidal lamps on the market is higher than that of ordinary energy-saving lamps.
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