What is the principle of ultraviolet germicidal lamp
Ultraviolet germicidal lamps can be seen in hospitals, laboratories, and many other places. Their appearance is very similar to that of common fluorescent tubes, but the shell is completely transparent. When turned on, it emits a faint purple light. Of course, it emits Most of the ultraviolet rays are invisible, which can play a role in sterilization and disinfection, and can prevent the spread of diseases. Here we mainly introduce the working principle of this germicidal lamp. Ultraviolet germicidal lamps are not only similar in appearance to fluorescent tubes, but also very similar in structure and principle, and can even be said to be the same technology. Because the fluorescent tubes used in our homes can be regarded as adding phosphors to the UV lamps. The interior of the lamp is filled with a small amount of mercury, which evaporates into mercury vapor when turned on, and the filament at both ends emits electrons to bombard the mercury atoms, producing ultraviolet light. These ultraviolet rays become visible light if they encounter phosphors. If it is equipped with a transparent glass shell or a quartz shell, it will directly emit ultraviolet rays, which is the germicidal lamp used in the professional field.
Ultraviolet light has a strong bactericidal ability, and this bactericidal ability is spectral, and can kill almost all bacteria under in vitro conditions. This is because ultraviolet light can destroy nucleic acids in cells, and the function of a cell is determined by the genes written by the nucleic acids. Therefore, when the nucleic acid is destroyed, the life activities of bacterial cells will be terminated, and the ability to reproduce is also lost. As long as the ultraviolet rays can reach the place, as long as sufficient irradiation intensity and irradiation time are achieved, these bacteria can be eliminated. Moreover, ultraviolet light has another function, that is, it can convert a small amount of oxygen molecules in the air into ozone, which is a strong oxidizing gas, which can further kill bacteria and other pathogenic microorganisms.
The above briefly introduces the principle of ultraviolet germicidal lamp. Because it directly uses light to kill bacteria, it will not have a corrosive effect on items like disinfectant, and it can cover a larger space. This feature determines It can be easily applied in many environments.
