The principle of the ultraviolet germicidal lamp is to use ultraviolet rays to kill the viruses that contaminating the surfaces of objects, water and air, including bacterial propagules, spores, mycobacteria, coronaviruses, fungus, etc, to cause it immediate death or non-reproduction, and ultimately achieve the effect of sterilization.
It is the UVC ultraviolet light that has the antibacterial effect. C-band of ultraviolet light can easily been digested and absorbed by the DNA of the bacteria, however the best band of ultraviolet light is around 253.7nm. Ultraviolet germicidal lamps are divided into two types: ozone and ozone free. The band without ozone is 254nm, and the band with ozone is 185nm. The UV lamp with ozone has no dead ends, but the smell is strong; the UV lamp without ozone is odorless, but the disinfection has dead ends.
Advantages: Ozone has a strong oxidizing effect, which can effectively kill bacteria. The dispersibility of ozone can make up for the shortcomings of ultraviolet rays which only spread in a straight line and has dead ends of disinfection.
The UV disinfection lamp should be placed in the center of the room, and the items that need to be sterilized must be fully exposed under the UV lamp. Before using, in addition to turning on the power supply and pressing the switch, the items in the room should be displayed in advance to avoid blocking each other. Clothing, bedding and other knitted items that need to be disinfected should be laid as flat as possible to be completely sterilized.
After turning off the UV light, the coming step is to “open the window”. Ozone will be generated during the disinfection of ultraviolet lamps. If the concentration is too high, it may cause nausea, dizziness and other symptoms, and even cause respiratory diseases in severe cases. Therefore, after disinfection with ultraviolet lamps, be sure to open windows for ventilation in time. Usually, it is safest to open the windows for 30 to 60 minutes for ventilation.