1、General provisions:
Ultraviolet radiation is a low-energy electromagnetic radiation, with the strongest bactericidal power at the wavelength of 250-270nm. During disinfection, the ambient temperature is controlled at 20 ℃ - 40 ℃, and the humidity is 40% - 60%. When it is used in the state without anybody, the spectrum of ultraviolet germicidal lamp of our company is 253.7nm,which is ozone ultraviolet. Through ultraviolet radiation and ozone sterilization, the DNA and RNAV of bacteria and virus are denatured, and the cells cannot reproduce.The ultraviolet germicidal lamp is effective for any bacteria or virus, such as common Escherichia coli, influenza A virus, Candida albicans, Staphylococcus aureus mites, carbon maggots, mites and other bacteria, and the surface polluted by the above microorganisms,Both water and air can be disinfected by ultraviolet。When disinfecting rough surfaces such as paper and fabric with ultraviolet rays, the exposure time should be extended appropriately, and both sides should be exposed to radiation。The ultraviolet radiation energy is low and the penetration is weak. It can only kill the microorganism directly exposed to it. Therefore, the disinfection part must be fully exposed to ultraviolet during disinfection。UV disinfection is a pure physical disinfection method, which is simple, convenient, broad-spectrum and efficient, without secondary pollution.
2、Application and maintenance of ultraviolet germicidal lamp :
The problem of radiation space range of ultraviolet germicidal lamp:
Many UV lamp users ignore the effective space range of UV irradiation and only consider the plane area of irradiation,The hanging ultraviolet disinfection lamp should be 1.8-2.2m away
from the ground. The total space cube should be calculated when using the disinfection lamp. The ultraviolet disinfection lamp with corresponding power should be used,The 36W
ultraviolet germicidal lamp produced by Dongdian Era lighting has an area of 30 ㎡ and a continuous irradiation time of no less than 30min, with a bactericidal rate of 99.5%.
Placement distance of UV sterilization lamp:
When using the UV sterilization lamp, pay attention to the irradiation distance between the sterilized object and the UV sterilization lamp, that is, the placement distance of the UV sterilization lamp should be less than 2.5m,Some ultraviolet sterilization lamps are placed more than 2.5m, even more than 3m or 4m. The irradiation intensity of ultraviolet is almost inversely proportional to the irradiation distance. If placed too far, the sterilization effect will be affected.
The decline of ultraviolet radiation intensity:
With the extension of service time, the ultraviolet radiation intensity of ultraviolet germicidal lamp decreases. It is recommended to replace the lamp in 5000 hours.
Maintenance of ultraviolet sterilization lamp:
When using the new lamp, wipe the lamp tube with 95% alcohol gauze, remove the dust and stains on the surface, wipe it regularly (once a week), and do a good job in cleaning the UV lamp tube, so as to achieve better sterilization effect.
Service conditions and protective measures:
It is use din the environment of no man or animal. Ultraviolet rays can cause burns to the eyes and skin, especially to the conjunctiva,After the face is damaged by radiation, the eyes are red, swollen, weeping and tingling, which is more serious than the damage of electric light eyes. It can be cured after three or four days。In case the conjunctiva is damaged by ultraviolet radiation, it can be dripped by human milk once every half an hour, three to four times better) Prevention method: avoid facing the light source. When monitoring and rechecking the radiation intensity of the ultraviolet sterilization lamp, use special
protective mask or sunglasses for protection. Do not use the protective equipment made of quartz glass as the raw material. Because the penetration rate of quartz glass to ultraviolet is more than 80%, the protection effect cannot be achieved.