UV disinfection cabinet principle UV disinfection cabinet purchase refers to

As people's living standards improve, awareness of food safety has increased, more and more people have begun to pay attention to the hygiene of tableware, so many people have begun to use household disinfection cabinets, then you understand the principle of UV disinfection cabinet? At present, large Some households commonly used disinfection methods (such as hot water, etc.) do not guarantee complete sterilization, and rely on household disinfection cabinets to solve problems. However, looking at the wide variety of household disinfection cabinet products on the market, how should consumers buy them? Do you know the UV disinfection cabinet purchase guide?

UV disinfection cabinet principle

The sterilization principle of the UV disinfection cabinet is to irradiate microorganisms such as bacteria and viruses through ultraviolet rays to damage the structure of the DNA in the body, kill the bacteria or lose the ability to reproduce. The dna has the strongest absorption of 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 reaches 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.

Disadvantages 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.

UV disinfection cabinet purchase guide

Standard 1: The principle of disinfection is reliable and safety is the key

In general, the disinfection method of household disinfection cabinets is divided into a single disinfection method and a combined disinfection method. Single disinfection methods such as high temperature disinfection cabinet, ozone disinfection cabinet and ultraviolet disinfection cabinet, the combined disinfection method is commonly used as ozone plus ultraviolet disinfection cabinet. The principle of high temperature disinfection cabinet is to use high temperature to play a bactericidal effect. High-temperature disinfection cabinets have strict requirements on disinfection temperature and time. Generally, the power is large and there are certain safety hazards. The principle of ozone disinfection cabinet is to use the strong oxidizing property of ozone to carry out antivirus. Ozone is a kind of spectral fungicide. It is necessary to maintain the ozone concentration in the cabinet to ensure the disinfection effect while ensuring that the ozone does not leak. The ultraviolet disinfection is to use the ultraviolet light of the appropriate wavelength to destroy the molecular structure of the DNA in the cells of the microorganism. Growth cell death and regenerative cell death achieve the effect of sterilization. National standards clearly stipulate that disinfection cabinets that rely solely on UV disinfection are not suitable for disinfection of utensils.

In terms of disinfection level, the state stipulates disinfection requirements of two levels of one star and two stars. One-star disinfection cabinet can effectively kill bacteria such as Escherichia coli and Staphylococcus aureus; two-star represents disinfection cabinet can effectively kill hepatitis B virus, poliovirus (polio) and other refractory viruses. And bacteria.

Standard 2: cavity sealing is better with air purification

At present, the disinfection methods used in the mainstream household disinfection cabinets on the market are inseparable from ozone. However, it has a strong irritating odor, which has caused many consumers to be discouraged when purchasing. This is because in a sealed sterilizer, ozone often cannot be completely decomposed, and once inhaled by the human body for a long time, it will cause damage to the body.

Therefore, the sealing of the chamber of the household disinfection cabinet must be good, and there should be no ozone leakage during work. At the end of the work, in order to ensure a more irritating taste of ozone, the disinfection cabinet should preferably have an air purification function.

Standard 3: Drying method should be environmentally friendly to prevent secondary pollution

We know that to avoid secondary pollution of tableware, household disinfection cabinets need to be kept dry and clean for a long time. Therefore, the household disinfection cabinets on the market generally have automatic drying functions. The main drying methods are: infrared drying, heat exchange, quartz tube heating, floor heating drying, and the like. The tableware has been sterilized. To prevent secondary pollution, the drying method is best to choose a physical type.

Standard 4: Functional settings need to be humanized and intelligent

Chinese households often use dishes and chopsticks, which vary in size and length. When choosing a household disinfection cabinet, we must consider the rationality of the disinfection cabinet for the storage of these utensils.

The above is the content of the UV disinfection cabinet principle and the UV disinfection cabinet purchase guide introduced by Xiaobian. I believe that everyone has some understanding of the principle of UV disinfection cabinet and the UV disinfection cabinet purchase guide. I hope that Xiaobian will introduce it to you. Can help everyone.