1. What damage does UV light do to the human body?
Germicidal UVC has the advantages of being colorless, odorless and without chemical residues is widely used in everyday life, such as various places where bacteria can easily breed, or places with high requirements for environmental quality (wards, operating theaters, etc.), and is now also used in some electrical products, such as air purifiers, new air conditioners, etc. The UV lampscurrently on the market can be divided into two types according to their wavelength, one with a wavelength of 253.7 nm and the other with a wavelength of 222 nm. At present, the wavelength of 253.7 nm UV lamp is the most widely used, but it will produce certain harm to the human body, so it is important to pay attention to safety when using it. The wavelength 222 nm UV lamp is harmless to humans, but the 222 nm wavelength UV lamp has only been developed in the last two years and people are still not aware of the 222 nm wavelength lamp, so its popularity is low. It is particularly significant to choose the right UVC lamp for your actual situation.
When a germicidal UV lamp with a wavelength of 253.7 nm is switched on, all personnel must leave the disinfection site to avoid being burnt by the UV light. Once the skin is exposed to the UVC lamp, it can cause redness, swelling, itching, and flaking in mild cases, or even skin cancer in severe cases. UV rays can damage the epithelial cells of the cornea. Exposure to UV lamps for more than two hours can cause varying degrees of foreign body sensation and, in severe cases, stinging, tearing and even eye cramps and blurred vision, causing conjunctivitis and keratitis. Long-term exposure can also lead to cataracts.
When the wavelength 222 nm UVC germicidal disinfection lamp is on, personnel can move freely when the wavelength 222 nm UVC germicidal lamp is harmless to humans, will not damage human skin, causing skin problems. But the popularity of 222 nm wavelength UVC lamps is not high, so they are not yet as widely quoted in people’s lives as wavelength 253.7 nm UVC germicidal disinfection lamps.
When the skin is accidentally burned by a UV lamp When the skin is inadvertently burned by a UV lamp, apply tea oil or skin cream immediately to the affected area. Cream for a few days in mild cases, but in severe cases For serious cases, apply the cream for 3 to 4 days and be careful not to scrub the burned area with Do not scrub the burned area with force. The burned area will automatically peel and heal after a week. If your eyes are accidentally burned, lie down immediately, close your eyes and apply a cold towel to the eye to reduce the blood in the eye, and change the towel promptly. Change the towel and seek medical attention.
3. How to use UV lamps scientifically?
Placement should not be random. As UV light penetrates very weakly in the air, it is difficult to achieve long-distance sterilization, while UV light has the same aging effect as sunlight. Therefore, when using a UV disinfection lamp, it should be placed in the main sterilization location, and valuable items, furniture, etc. should be as far away as possible.
The exposure time is limited. UVC lamp exposure time is generally 30-60 minutes, 1.5 watts of UVC disinfection lamp per cubic meter, i.e. one 30 watt UVC disinfection lamp per 20 square meters of space, and so on.
Keep the sterilization environment clean. Whether the environment is dry and clean will affect the germicidal effect of the UV disinfection lamp, the ambient temperature is 27 to 40 ℃, the maximum output intensity of ultraviolet light, too high humidity or too much dust will reduce the germicidal ability of the disinfection lamp.
A dark environment is more effective. When using a UVC disinfection lamp, it is best to close doors and windows, pull The dark environment is more conducive to UVC This is more conducive to the germicidal effect of UVC. Turn off the UV lamp after disinfection. After disinfection, open the windows and doors and allow sufficient ventilation After disinfection, turn off the UVC lamp, open the windows and doors and allow sufficient ventilation before entering the room.
Replace the disinfection lamps regularly. Disinfection lamps are slow to leak and should be replaced after 8000 hours of use. After 8,000 hours of use, the lamp needs to be replaced in time, usually once a year. Replace the lamp once a year.