T5/4W/6W/8W UV germicidal lamp/disinfection lamp

Brand number, processing, customized lamp holder, model type, ultraviolet germicidal lamp degree
Glass bulb form Gaopeng/stone shell outer diameter length
Structure of ultraviolet germicidal lamp
Ultraviolet germicidal lamp (lamp) is actually a kind of Low-pressure mercury lamps, like ordinary fluorescent lamps, use low-pressure mercury vapor () to be excited and emit ultraviolet light. The difference is that the fluorescent tube is made of ordinary glass, so ultraviolet rays cannot pass through and can only be absorbed by the phosphor on the inner wall of the tube to excite visible light. If you change the composition and ratio of the phosphor, it can emit different colors of light that we normally see. Generally, the lamp tubes of germicidal lamps are made of quartz glass, because quartz glass has a high transmittance to all ultraviolet bands, up to %%, and is the best material for germicidal lamps.
Germicidal lamps have several structures, such as hot cathode low-pressure mercury vapor discharge lamps and cold cathode low-pressure mercury vapor discharge lamps. They can be divided into various types according to appearance and power.
There is a big difference in performance between quartz glass and ordinary glass, mainly due to the difference in thermal expansion coefficient. Generally, aluminum-covered lamp holders cannot be sealed, so the lamp holders of germicidal lamps are mostly made of bakelite, plastic or ceramics.
Lamp tubes of ultraviolet germicidal lamps
Due to cost and different uses, high borax glass tubes with ultraviolet transmittance < % are also used instead of quartz glass. The production process of high boron glass is the same as that of energy-saving lamps, so the cost is very low. However, its performance is far inferior to quartz germicidal lamps, and its sterilizing effect is quite different.
The ultraviolet light intensity of high boron lamps is easily attenuated. After hundreds of hours of lighting, the ultraviolet intensity drops significantly to %% of the initial level. After the quartz lamp is ignited for an hour, the ultraviolet intensity is only reduced to %% of the initial value, and the degree of light decay is much smaller than that of the high boron lamp.
Principle of ultraviolet sterilization
Ultraviolet sterilization is to destroy and change the (DNA) structure of microorganisms through ultraviolet irradiation, causing the bacteria to die immediately or be unable to reproduce, thereby achieving the purpose of sterilization. The real bactericidal effect is ultraviolet rays, because ultraviolet rays in the wavelength band are easily absorbed by living organisms, especially ultraviolet rays around .
Ultraviolet sterilization is a purely physical disinfection method. It has the advantages of simplicity, convenience, broad spectrum and high efficiency, no secondary pollution, easy management and automation. With the introduction of various new designs of ultraviolet lamps, the application of ultraviolet sterilization The scope is also constantly expanding.
Problems with ultraviolet germicidal lamps
Special process, difficulty in manufacturing, and high price. Due to the special properties of quartz glass, the production of germicidal lamps cannot be scaled up, resulting in a high cost of quartz germicidal lamps and hindering their further promotion and use.
, the light attenuation is large and the life is not long. After the ultraviolet germicidal lamp produced by general manufacturers is lit for hundreds of hours, its ultraviolet light intensity decays quickly, reaching a maximum of %, and the sterilization effect is greatly weakened. In addition, the cathode damage caused during processing also affects the life of the ultraviolet germicidal lamp. Since the light decay mechanism of ultraviolet germicidal lamps and fluorescent light decay are not exactly the same, this problem still needs to be solved by all parties.
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