A design life. The following factors affect the UV lamp life.
1, the tube wall loading. Big load lamp life, the same operating current, tube diameter of small low life.
2, the working voltage. High lamp voltage low life.
3, the power density. Low power density high lamp life.
Two. Material. The quality of the wall of the quartz glass lamp life great. Good quartz glass of high purity, and no internal bubble, smooth surface. Because the wall temperature is generally above 600 ℃, if the purity is not enough with impurities, occur gasification of the glass surface, resulting in many tiny pits affecting ultraviolet radiated wall. Domestic quartz pipe eyes intuitive can see the bubbles, the influence of UV radiation in the wall within the wall, the bubble will be formed at high temperature high pressure air mass, so that the wall rupture. The electrode material is tungsten surface burn coated with a layer of barium zirconate or other cathode emission materials. Tungsten and cathode materials aging resistance, temperature resistance directly affect the electrode life.
Production process. This factor is the most important factor in restricting the quality of domestic UV lamp. The main process affecting lamp life: cleaning the wall of the lamp vessel, vacuum, the purity and the injection amount of the mercury, argon charge heavy volume, electrode lead welding, sintered cathode material. The entire process should be advanced clean place; cathode material sintering, soldering and sealing should be done under vacuum. The current domestic production of UV lamp manufacturers do not have these conditions greatly affect lamp life.
Four using the method. Incorrect use, will make the lamp life is greatly reduced. Should pay attention to the following points:
1, transformer parameters with lamp parameters to match the voltage and current can not exceed the design specifications. In particular, should not be too high start-up voltage, usually no more than 40% of the operating voltage of the design.
2, to keep the wall clean, especially the removal of grease, dust. Because these substances will penetrate the lamp at the high temperature of the wall surface, hindering UV radiation.
3, ventilation scientific and reasonable. Ventilation rate calculated by the scientific purpose is sucked out of the tube, the heat generated by the UV lamp lights to work in normal temperature environment, not the temperature as low as possible. Ventilation so that the lamp temperature is maintained below 150 ℃. In addition, with a reasonable amount of wind the line within the light box, sensor, tank shell temperature is kept below 90 ℃.
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