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Principle of ultraviolet lamp

by:LiangYueLiang     2020-09-23
1, ultraviolet light in mercury discharge tube, the tube body suspended mercury vapor this inert gas, consists of two electrodes and a quartz glass tube of insulator.


when the uv lamp power and be excited, mercury in 254 nm, 310 nm and 365 nm peak, the produced between 200 and 400 nm ultraviolet ray radiation, including peak 365 nm uv lamp types, they are widely used in industrial drying curing surface processing operations; 254 nm and 185 nm special tube is often used for sterilization, sewage treatment, lampblack purification, even the light cleaning.


the most common use of ultraviolet lamp is electricity made of medium pressure mercury arc lamp or MPMA lamp. It can be produced into a few millimeters to more than 2 meters length, power can be less than 1 w, the sterilization lamp in curing lights to 25 kw. The curing light changes from 1000 to 2500 hours, the life of a germicidal lamp life changes from 6000 to 20000 hours.









UV germicidal lamp









light curing UV lights


2, UV lamp made of quartz glass tube, because this is transmit ultraviolet light and endure 6 at the same time to the high temperature of 800 ° C the only material. Uv lamp will have a little swelling and do have a high melting point temperature ( 1100°C)


3, made from tungsten electrode: production process is very complicated. Use tungsten, because the temperature of the curve can be increased to more than 3000 ° C.


4, with molybdenum plate to connect the electrodes and wires, can swell with quartz. And still can endure high voltage when heating.


5, light was finally hang to ceramic ( Or otherwise) Insulator.


6, because the current supply often is not enough to power a MPMA light, ultraviolet tube is usually used with transformer and capacitor matching.
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