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As a result of ultraviolet ray damage to biological cells, in the use of ultraviolet sterilization lamp should pay attention not to direct irradiation to human skin, more do not directly use the eyes to look directly at the lamp.

Under the premise of ensuring safety, how to use ultraviolet sterilization lamp scientifically and effectively?Pay attention to the placement to create the best environment and the duration of use, Wang said.

First, because of the extremely weak penetration ability of ULTRAVIOLET ray in the air, it is difficult to achieve the long-distance sterilization ability, so in use should be placed as far as possible in the main bactericidal position, such as indoor middle, or easy to breed bacteria, distance around 1.5m-2m is appropriate.

Second, attention should be paid to the effect of environment on sterilization.Normally, the temperature between 27℃ and 40℃ uv output intensity, sterilization effect is the best, in addition to ensure the use of clean and dry environment, a lot of moisture and dust in the environment, will interfere with the ULTRAVIOLET and weaken the effect, reduce the actual ultraviolet intensity.When using in the home, as far as possible airtight door window, close the curtain, turn off lamplight, ensure indoor be in below darker condition, more benefit ultraviolet ray plays germicidal effect, to easy breed the place such as germ of bacterium, for example bed quilt, can bed is spread out, increase contact area, more benefit ultraviolet ray germicidal disinfection.

Third, ultraviolet sterilization lamp should ensure sufficient ultraviolet irradiation time when using.Studies have shown that after 5 minutes of irradiation, daily disinfection effect can be achieved when the irradiation time reaches 30 minutes, and when the irradiation time reaches 60 minutes, most of the bacteria and other microorganisms in the air can be killed.

Semiconductor illume unites innovation state key laboratory director Li Jinmin to introduce, ultraviolet ray disinfects the principle that kill bacterium namely the ultraviolet ray that USES high energy breaks DNA double helix strand, achieve the inactivation to bacterium and virus thereby.To realize effective sterilization, ultraviolet light needs to meet certain requirements. It is necessary to pay attention to the wavelength, irradiation dose and time of ultraviolet light source, that is, it must be the deep ULTRAVIOLET light of UVC wavelength below 280nm, and it is necessary to meet a certain irradiation dose and time for different bacteria and viruses, otherwise it cannot be inactivated.

According to Yan Jianchang, a researcher at the Institute of Semiconductors of the Chinese Academy of Sciences, ultraviolet wavelengths can be divided into UVA, UVB and UVC.UVC is the wavelength with the shortest wavelength and the highest energy. In fact, for sterilization, the most effective wavelength is UVC, which is called the deep ultraviolet band.Compared with chemical sterilization, the advantages of UV sterilization is high efficiency, inactivation is generally completed within a few seconds, and no other chemical pollutants.

Ultraviolet light also inactivates microorganisms.Homes can purify water by installing uv water purification systems, and air purifiers equipped with UV lamps can neutralize bacteria floating in the air.Wastewater treatment plants, food plants, breweries, and beverage plants also use ULTRAVIOLET disinfection.