Is the UV disinfection cabinet ok? What are the classifications of high temperature disinfection cabinets?
With the development of society, health problems are highly valued by people, and disinfection cabinets can help everyone, so many families have already purchased disinfection cabinets. There are more and more brands and types of disinfection cabinets on the market, one of which is the UV disinfection cabinet . There are questions about the hazards of UV disinfection cabinets. Then follow the decoration home network Xiaobian to learn about the relevant content!
1, the principle of ultraviolet disinfection cabinet
The sterilization principle of the ultraviolet disinfection cabinet is to irradiate microorganisms such as bacteria and viruses through ultraviolet rays to damage the structure of DNA in the body, kill bacteria or lose reproductive ability. DNA absorbs most ultraviolet light at a wavelength of 253.7 nm. The sterilization effect of ultraviolet light is related to its irradiation intensity and total irradiation amount, and generally can reach a killing rate of ≥ 99%. When the dose of irradiation (the product of the intensity of illumination and the moment of illumination) increases, the number of bacteria killed increases, but the percentage of bacteria killed does not increase as the proportion of the dose increases. A small dose can also kill a small amount of bacteria; if the amount of bacteria is large, some bacteria will not be killed even with large doses.
2, the shortcomings of UV disinfection cabinet
Ultraviolet light can only travel in a straight line, with low radiant energy and weak penetrating power. It can only kill microorganisms that are directly irradiated. Therefore, the disinfection site should be exposed to ultraviolet light as much as possible during disinfection. Because of the layout of the sterilizer itself and the dense placement of the dishes, the ultraviolet radiation is blocked by the dishes themselves. Many parts of the dishes cannot be exposed to ultraviolet light. The bacteria and viruses in these parts will not be killed by ultraviolet rays. Therefore, according to the national standard rules, the utensil disinfection cabinet can not only use ultraviolet light as a single disinfection method. Generally, direct touch of ultraviolet light is harmful to everyone. However, the ultraviolet transmittance of general glass and tempered glass is only 0.01 to 0.1%. Therefore, the use is very safe. Because ultraviolet radiation is harmful to the human body, UV disinfection cabinets are not allowed to leak. If ultraviolet light can be directly seen from any opaque part of the machine, it should be stopped and repaired.
3, classification of high temperature disinfection cabinet
The high temperature disinfection cabinet is generally divided into a one-star disinfection cabinet and a two-star disinfection cabinet. The basis of the distinction is different from their bactericidal effect. Generally, the one-star sterilizer requires the temperature in the sterilizer to reach 100 °C or above, which can kill bacteria such as Escherichia coli and Staphylococcus aureus, and the killing rate is 99.9 %. , but can not kill hepatitis B virus; the two-star disinfection cabinet requires the temperature inside the disinfection cabinet to reach 120 °C or above, in addition to killing bacteria that can be killed by a star disinfection cabinet, it can also kill hepatitis B virus and poliovirus. The virus has a kill rate of 99.9%. But it does not work for inorganic chemical poisons and a few special biological viruses.
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