Last weekend, a shocking message quickly forward circle of friends in shenzhen. A primary school on May 19, shenzhen driving ultraviolet disinfection lamp, led to a number of students eye burns. 19 in the afternoon, after school, shenzhen luohu district qingshui river school class two, grade one of a number of parents found that children of their own eyes appear red and swollen, pain and tears. Have two children in both the cases of children's hospital of shenzhen, two people all eyes slightly conjunctival hemorrhage, corneal epithelial dot defect falls, pupils round, light reflex sensitivity. A preliminary diagnosis of electro-optic ophthalmia, eyes discomfort to visit at any time.

Since then, qingshui river school principal Zhao Shili to respond that this happens because line tripping, restore power, the teacher will not carefully ultraviolet disinfection lamp open, found after turn off in time. Zhao Shili introduction, sterilizing lamp is probably a class at two o 'clock in the afternoon when he opened, after more than three clock found off, opened more than an hour, probably about two dozen children's eyes appear different degree of swelling, and so on and so forth.

On April 18, hangzhou downtown east garden as a kindergarten class this situation happened. Because the teacher forget to close the ultraviolet disinfection lamp 2 hours in the classroom, lead to similar uv burns caused by 27 children 'electro-optic ophthalmia' symptoms, many children fever, inflamed eyes tears.

Shocking photographs look at above, let a person heartache. The children is a fresh flowers of our motherland, their face is so innocent, and it is vulnerable. The installation of uv leds was supposed to disinfect the classroom, create a safe learning environment for the children, but eventually became the children's health killer, worth we think deeply of this warning.

It is understood that the lamp is commonly used in the field such as medicine, drinking water and food sterilization tool, during the period of "SARS", began to all kinds of public places and families. Some look from the exterior, and the household of the fluorescent lamp is similar, easy to confuse. And a lot of schools in order to facilitate when installation, uv lamp and fluorescent lamp installed together. Due to no obvious warning marks on the products, the businessman in the propaganda also often ignore the dangers of it, coupled with the consciousness of the school on the lamp how security applications popularization and installation does not reach the designated position, the damage by uv light have occurred in recent years. Especially the children's eyes, in the period of development when meeting light pollution can easily injured, so the lamp burns in children is big probability event.

Microelectronics research institute at Peking University, Shanghai, said professor yan shigemitsu uv and blue light will be the retina to produce a harm to human body this is common sense, the hospital usually abide by strict rules, in the ultraviolet sterilization room can't someone, or to enter to do strict protective measures. But many classrooms in the school, the ultraviolet lamp, did not do the relevant safety operation training, lead to accidents.

School when installing the lamp, therefore, must strictly follow the following requirements: ultraviolet disinfection lamp and lamp switch must be set apart, and keep a certain distance, ultraviolet disinfection lamp switch and lamp switch are not allowed to be parallel. Switch is set to 2 meters from the ground, lifted the lid, and switch to eye-catching warning label on the lid, not simply write the word "ultraviolet disinfection lamp". Advocate set up a dedicated circuit, equipped with unified lock the power control switch box, unified by the specialist of ultraviolet disinfection lamp power supply control, in order to prevent the irrelevant personnel driving the misuse of ultraviolet disinfection lamp.

The harm of ultraviolet germicidal lamp radiation to the human body will have the following several ways:

Of photosensitive dermatitis induced by 1, : refers to the exposure to certain chemicals such as asphalt, receiving ultraviolet radiation and skin lesions.

2, skin erythema reaction: ultraviolet rays can burn skin, illuminated skin flush, there is pain, serious when they form erythema even blisters, erythema receded after a few days, the skin desquamation, and pigmentation.

3, electro-optic ophthalmia: wavelength 250-320 nm uv irradiation, can cause keratitis and conjunctivitis. Just fell ill just feel eyes, foreign body sensation and mild discomfort, heavy feel burning, pain, photophobia, tears, blepharospasm, etc. As frequently, can cause chronic blepharitis, and conjunctivitis. A strong ultraviolet ray also can cause eye damage.

4, mutagenic and carcinogenic effects: ultraviolet irradiation mammals can cause gene mutations, lead to skin cancer. Less than 320 nm wavelength ultraviolet more likely to cause skin cancer.

5, less than 250 nm wavelength ultraviolet effect on some substances in the air, also can produce photochemical smoke and toxic gases.

The use of ultraviolet disinfection lamp method and the matters needing attention:

1, ultraviolet disinfection lamp installation: every 10 meters can be installed 30 watts of uv lamp, effective distance is less than two meters. At the same time, must be equipped with indoor temperature, hygrometer.

2, for air disinfection should be shut doors and Windows, since the light is 5 to 7 minutes time, sterilization time shall not be less than 60 minutes at a time, in the process of ultraviolet disinfection lamp to prohibit personnel enter indoor, must enter, should first stop ultraviolet disinfection lamp, especially the young, unmarried woman to keep in mind this.

3, ultraviolet disinfection lamp sterilization items, the items out or hang, expand the radiation surface, the effective distance of one meter, illuminate 30 minutes.

4, the use of ultraviolet disinfection lamp, should keep the environment clean, cannot have dust in the air and water spray, when indoor temperature below 20 degrees Celsius or more than 50%, the relative humidity should be prolonged exposure. After scrubbing should stay on the ground after the ground dry again ultraviolet light disinfection.

5, ultraviolet disinfection lamp bulb surface should be clean, no dust, with 95% alcohol cotton ball wiping once a week, and recorded in the best.

6 have certain damage, ultraviolet radiation to human body skin mucous membrane, should pay attention to when using ultraviolet disinfection lamp complete protection, eyes absolute can't look straight into the ultraviolet ray light source, or eyes will hurt.

7, to use time of ultraviolet disinfection lamp to establish a book, each irradiation time record time, because of ultraviolet disinfection lamp tube service life for 1000 hours. Also, on a regular basis with ultraviolet intensity indicator card uv intensity of ultraviolet disinfection lamp for testing.

Uv lamp and the correct use of standard operation, can bring us benefits. Through these lessons, we hope that relevant departments must strengthen the safety training schools use ultraviolet light-emitting diodes (leds), and strict supervision, the school will disinfection lamp and lamp switch Settings, alone by the specialist is responsible for the kill. Is the purpose of ultraviolet lamp used for the sake of our health, hope children hurt events no longer occur.