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Precautions for the Use of UV Lamps

Sep. 29, 2020
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The uv sterilizer lamp is the "invisible killer" of the eyes. The irradiation of the ultraviolet disinfection lamp can cause inflammation of the conjunctiva and cornea and cause cataracts and other diseases. Of course, this refers to the large-scale disinfection lamp. It is different from the small-scale UV lamps that are used in some restaurants and households to eliminate mosquitoes. The kind can be used with confidence.

The scope of application of ultraviolet lamps is to disinfect indoor air and the surface of objects, water and other liquids. Ultraviolet light eliminates pathogenic microorganisms in the external environment, cuts off the spread of infectious diseases, blocks the spread of infectious diseases, and achieves the purpose of protecting human health. Ultraviolet disinfection lamps are mainly used for air disinfection.

The range of ultraviolet lamp is used. The line emitted from the inner surface of the germicidal ultraviolet lamp is c-wave, and its wavelength range is 200-270nm, and the central wavelength of sterilization is 253.7nm. In the case of sufficient ultraviolet intensity and irradiation time, all microorganisms can be killed.

UV Sterilizer Lamp

The number of indoor suspended UV disinfection lamps installed (30W UV lamps, with a radiation intensity higher than 70μW/cm2 at a vertical 1m) is an average of not less than 1.5W per cubic meter, and it is required to be evenly distributed and the lifting height is 1.8~2.2m from the ground , So that the human breathing belt is in the effective irradiation range. Continuous irradiation is not less than 30 minutes, the intensity of ultraviolet radiation is inversely proportional to the radiation distance, and the suspension is too high, which will affect the sterilization effect. If it is to disinfect the surface of the object, the distance between the lamp tube and the irradiated surface should be 1m for the disinfection to be effective.

The distance between the ultraviolet sterilization lamp and the roof should not be greater than 1.5m, the distance from the ground should not be greater than 2.5m, and the distance from the object to be disinfected is about 1m. The effective area of disinfection is 1.5-2m around the ultraviolet lamp tube for 30 minutes or longer. The cumulative time of each UV lamp tube is 1000 hours. If it exceeds 1000 hours, it should be replaced in time. Newly replaced should indicate the replacement time and re-accumulate the use time. During the use of the ultraviolet lamp, the surface of the ultraviolet lamp should be kept clean. Generally, use an alcohol cotton ball to test once every two weeks. If there is a gray layer or oil stain on the surface of the lamp, it should be tested at any time.

The disinfection of the air by ultraviolet rays mostly uses a fixed irradiation method. Installing a reflector on the ultraviolet germicidal lamp will enhance the killing effect. Fixed irradiation is to hang the ultraviolet lamp under the ceiling slightly above the person's head, and irradiate it downward (forward irradiation) or fixed on the wall for lateral irradiation. Although this type of irradiation only irradiates the local air, the air convection can disinfect the entire room. The effect of forward or side irradiation on air disinfection is better. However, because ultraviolet rays are harmful to the human body, such devices are only suitable for use when no one is present. Generally speaking, the wattage of the ultraviolet disinfection lamp installed per cubic meter of space is ≥1.5W. In addition, the switch should be set more than 2 meters above the ground, time switch, and the switch box cover should be affixed to the eye-catching warning signs, and the words "ultraviolet light" should not be simply written.

The above information is provided by UV sterilizer manufacturers.


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