1. UV light wavelength of 200-270nm, belongs to the short-wave ultraviolet light, this ultraviolet light is mainly through radiation damage and destruction of microorganisms (bacteria, viruses, spores) nucleic acid function to kill microorganisms and other pathogens, in order to achieve the purpose of disinfection.
2. Ultraviolet light can only irradiate the surface of the object, can not penetrate the interior, and the use of ultraviolet lamps, people must leave, ultraviolet disinfection lamps on the human body in the three aspects of the injury:
① Injury to the skin: Skin exposure to ultraviolet disinfection lamps can cause redness, swelling, pain, dryness and desquamation, skin aging and other changes. If prolonged exposure, may cause cancer of the skin;
② electro-optical ophthalmia: manifested in the eyes red, swollen, tearing, stinging and other symptoms;
③ short-term exposure to ultraviolet disinfection lamps, corneal epithelial cells can be damaged caused by vision loss. Therefore, in the use of ultraviolet disinfection lamp, the room does not have someone and close the door.
3. When disinfecting the surface of articles with ultraviolet light, the irradiated surface should be exposed to direct ultraviolet radiation, and should reach a sufficient irradiation intensity, irradiation time is generally 30 ~ 60 minutes. As the ozone released has a certain odor, which can damage the respiratory tract and cause dizziness, the doors and windows should be opened to ventilate the room after disinfection for at least half an hour before entering the room.