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The working principle of UV germicidal lamp

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The working principle of the ultraviolet germicidal lamp: using the energy of LED ultraviolet light to penetrate the cell membrane of microorganisms, destroy the DNA structure of various germs, bacteria, parasites and other pathogens, destroy their nucleic acid molecular bonds, and make them inactive and die , So as to achieve the role of disinfection and sterilization. Application environment: All viruses, bacteria and parasites in the air are killed.

Application environment: all viruses, bacteria, and parasites in the air can be easily eliminated! Households, kindergartens, offices, schools, nursing homes, Internet cafes, food industry, catering industry, pet shops, hospitals, hospitals, basements and places where the air is not smooth and do not see the sun, the effect of disinfection and sterilization is particularly outstanding) cost-effective.


This picture is the front and back of the UV sterilization lamp.

This is the nameplate of the UV lamp. There is also a schematic diagram of this lamp above. And matters needing attention. And some index parameters. The quality of the currently dissected product is average, and many of the schematic diagrams on the label do not match the internal structure, which will be explained one by one later. In addition, this product cannot see any certification marks, which is also wrong.


Many parts of the shell of the dissected product are made of aluminum, so the three-core wire is used. When choosing products, you should pay attention to whether there is a CCC certification mark on this line and whether it is a national standard line. At this point, this anatomical product is pretty good.

This picture shows the top cover of the lamp and after removing the top cover, you can see the wiring of the parts inside. You can see that this workmanship is not standard. The cable tie fixing buckle and the screw anti-loosening glue are not made according to the standard. There is no fuse either. There is no protective cover for the power cord, and the wiring inside does not match the schematic diagram on the label. The difference is far away.

The picture shows the ballast and starter. The ordinary pieces are used. When repairing this kind of sterilization lamp, many of the starters are broken. If you are not sure, you can use a multimeter to test whether the coil inside the ballast is broken. If the coil is open, change the ballast instead of the starter. The inside of this starter is the same as that of ordinary fluorescent tube. The quality in the picture is average. Many good starters consist of a neon tube and a polyester capacitor connected to two copper contacts. Click on. There is no capacitor in this picture.

To sum up, the effect and service life of this UV disinfection lamp are worrying.

Ultraviolet lamps are among the most important parts of the production, and they are wear parts. All other components serve it. When purchasing lamps for household products, you should refer to these places in the picture and refer to the selection and purchase and replacement of lamps for maintenance. It consists of ballast starter, step-up transformer, cooling fan, etc. But generally no one uses this high-power structure for household use. This kind is too big, a few hundred W to several thousand W are of this kind of structure, this kind is mostly used for disinfection and sterilization of industrial or medical equipment. Basically all household appliances are within 100W. There is a wiring diagram on the starter. Connect according to the picture. Generally speaking, it is basically because the boot device is bad. The transformer does not smell of burning, the wiring in various places is also good and not loose, and the switch is not burnt or damaged. When repairing, just replace this starter.

Let me talk about the selection principle of power and area: 1W (1 watt) corresponds to 1 square meter. Choose as much W as your house is. The picture also compares the advantages of ultraviolet sterilization and disinfection lamp with disinfectant, alcohol and rice vinegar. You can refer to it.

In addition, it is best to choose a disinfection lamp with remote control and timing functions. If not, adding a timer socket is also a good match. But relatively, with more functions, maintenance is more troublesome. Understand clearly and then buy. It’s just right, not necessarily the most expensive one. It is recommended to buy products from major brands and choose a model, the quality is relatively guaranteed.


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