UV disinfection requires ventilation, because the products of UV ozone damage to the human body, UV disinfection will produce ozone diffusion in the air, ozone is harmful to the human body, its ability to destroy the body’s immune function, will lead to a decrease in the body’s resistance, some will appear blood system diseases. The main symptoms of ozone inhalation are central nervous system symptoms, dizziness, headache, vision loss and other symptoms, a few people can appear nausea, vomiting and other digestive discomfort performance, while UV disinfection often produces a special smell in the air, disinfection immediately after entering the room some will appear spicy pain in the eyes, nose itching and other symptoms of irritation, so the use of UV disinfection need to maintain ventilation For a period of time, generally about half an hour of ventilation, so that the concentration of ozone and its products to reduce, so as not to cause harm to humans.