Which disinfection method is good for disinfection cabinet?
1, high temperature disinfection
Generally, high-temperature disinfection adopts a heating temperature greater than 100℃ for more than 15 minutes, so as to denature the protein tissue of microorganisms including bacteria and viruses and achieve the purpose of killing bacteria and viruses. The heating mode of high temperature disinfection cabinet is generally far infrared ray. The electric heating element heats air or generates radiant heat. After a period of high temperature, the protein tissue of bacteria, viruses and other microorganisms on the surface of tableware is deformed and killed.
Ozone disinfection cabinet uses the strong oxidation of ozone for disinfection. Ozone is a bluish explosive gas with a special smell at room temperature. It is one of the strongest oxidants known and a broad-spectrum bactericide. However, ozone leakage will endanger human health, and the allowable value in the air of workplace is 0.2mg/m3. Therefore, ozone disinfection cabinet should keep the concentration of ozone in the cabinet to ensure the disinfection effect under the condition that ozone does not leak.
The tableware disinfection cabinet with oxygen and ultraviolet rays is a disinfection cabinet using ultraviolet rays and ozone as disinfection means. The ultraviolet lamp used for disinfection and sterilization should be a high ozone ultraviolet lamp. The wavelength range of ultraviolet rays is 200 ~ 275 nm, and the strongest bactericidal band is 250 ~ 270 nm. When the voltage of the ultraviolet lamp used for disinfection is 220V, the ultraviolet radiation intensity at 253.7nm should be no less than 70 W/cm2.
Ultraviolet rays have low energy and weak penetration, and can only kill directly exposed microorganisms. Therefore, the disinfection site must be fully exposed to ultraviolet rays during disinfection. The ultraviolet lamp also produces ozone, which also plays a role in sterilization.
2, ultraviolet disinfection
Ultraviolet is a short wave whose wavelength is outside the visible range. According to the radiation principle, it is a visible "blue light" and has no disinfection effect. According to the wavelength range, ultraviolet light can be divided into three bands: A, B and C and vacuum ultraviolet light.
A-band 320 ~ 400 nm
B-band 275 ~ 320 nm
C-band 200 ~ 275 nm
Vacuum ultraviolet 100 ~ 200 nm
Among them, C-wave ultraviolet rays have a real bactericidal effect, especially ultraviolet rays with a wavelength of 253.7nm are the best. Ultraviolet rays can kill various microorganisms, including bacterial propagules, spores, mycobacteria, viruses, fungi, rickettsia and mycoplasma, with broad spectrum.
Its sterilization principle is to destroy the structure of DNA (deoxyribonucleic acid) in organisms by irradiating microorganisms such as bacteria and viruses with ultraviolet rays, so that they die immediately or lose their reproductive ability. DNA has the strongest absorption of ultraviolet rays with the wavelength of 253.7nm, and the sterilization effect of ultraviolet rays is related to its irradiation intensity and total exposure, and the general killing rate can reach 99%. When the irradiation dose (the product of irradiation intensity and irradiation time) increases, the number of bacteria killed increases, but the percentage of bacteria killed does not increase in proportion to the irradiation dose. A relatively small dose can also kill a few bacteria; If there are many bacteria, even if there is a considerable dose of radiation, some bacteria are still free from death.
Selection method of disinfection cabinet
The quality of disinfection cabinets on the market is uneven. When purchasing, you should master certain skills to avoid going astray and buying inferior products. How to choose a disinfection cabinet? You might as well take a look at this shopping guide:
1, qualified product. Check the product information carefully when purchasing, including registered trademark, manufacturer, address, hygiene license, etc.
2. Appropriate volume. Choose a disinfection cabinet with appropriate size according to the family population, such as a family of three, and choose 600W and 50-70 disinfection cabinets. For a family of four, consumers can choose a 60-80L disinfection cabinet.
3, the corresponding appearance. According to the position to be placed, choose the disinfection cabinet with appropriate material. If you put it in the kitchen, it is appropriate to choose a stainless steel disinfection cabinet. Because there is a lot of oil smoke in the kitchen, the material of disinfection cabinet is not easy to clean, and the equipment is blocked in the later stage, which is prone to failure.
4. Test its function. When purchasing, it is necessary to test the function of the disinfection cabinet. It is suggested that consumers can turn on the power supply, wait until the indicator light is on, and wait until the temperature in the cabinet rises by 50 degrees before stopping. If the far infrared heating element of the disinfection cabinet is normal, it means that there is no fault in the disinfection cabinet.
How to use the disinfection cabinet
After purchasing a satisfactory disinfection cabinet, use it according to the instructions.
1. The socket connected with the plug of the disinfection cabinet should be connected with the ground wire. Check clearly before use, and it is best to meet the electricity consumption standards.
2. Drain the water on the tableware or dry it with a cloth, and then put it into the disinfection cabinet for disinfection, which can shorten the disinfection time and avoid damage to the internal parts of the disinfection cabinet.
3. Plastic and glass tableware should not be put into the high-temperature disinfection cabinet, because these tableware are not resistant to high temperature and need to be disinfected in ozone disinfection cabinet.
4. Dishes and cups should be separated in the disinfection cabinet. It is best to put it vertically, so as to facilitate heat transfer and speed up disinfection.
5. Pay attention to the effectiveness of the generator when using the disinfection cabinet. If you can't hear the squeak of discharge, it means there is a problem, and you should find a professional repairman to repair it in time.
6. Don't open the door of the disinfection cabinet frequently, especially when it is powered on, because it will easily lead to ozone leakage and affect people's health.
Extended content: knowledge of the use and cleaning of disinfection cabinets.
1. Tableware should be washed and drained before being put into the disinfection cabinet, which can shorten the disinfection time and reduce power consumption. Tableware should be washed and drained before being put into disinfection cabinet, which can shorten disinfection time and reduce power consumption. Tableware should be washed and drained before being put into disinfection cabinet, which can shorten disinfection time and reduce power consumption.
2. Tableware that can't withstand high temperature, such as plastic, can't be placed in the high-temperature disinfection cabinet, so as not to damage the tableware; Colored porcelain ware will release toxic heavy metals such as lead and cadmium when put into disinfection cabinet, which is harmful to human health. Because when ceramic bowls, plates, cans and guanCHR(39) bowls are glazed, their enamels and pigments all contain toxic heavy metals such as lead and cadmium. At room temperature, these substances are stable, but they are easy to overflow when they encounter high temperature. Under the working condition, the internal temperature of the high-temperature disinfection cabinet can be as high as 200℃. Often putting food in these sterilized colored porcelain will pollute food and endanger health.
3. Bowls, plates, cups and other tableware should be placed vertically on the shelf, and it is best not to stack them so as to ventilate and disinfect them as soon as possible.
4. During ozone disinfection, it is forbidden to open the cupboard door to avoid ozone leakage. Because the ozone in the cupboard has reached a certain concentration at this time, if you open the cupboard door, all the ozone will be released. Although high concentration ozone can be disinfected, it is also very harmful to people and the environment.
5. When using the ultraviolet disinfection cabinet, you should pay attention to whether the ultraviolet rays leak or not, and ultraviolet rays will also cause harm to the human body. If the disinfection cabinet door is damaged, it should be repaired in time. Most disinfection cabinets in Tai Fang are equipped with intelligent safety lock function, which ensures that users will not accidentally open the cabinet door during use, resulting in the leakage of ultraviolet rays.
6. Don't open the cupboard door immediately after disinfection, wait for 20 minutes before opening the cupboard door, which can make the disinfection effect better and reduce the ozone in the disinfection cabinet. When the cupboard door is opened, a small amount of ozone will overflow, but the ozone concentration at this time is not harmful to human health.
Cleaning knowledge:
1, used tableware must be washed first, and the water must be dried before putting it into the disinfection cabinet. Some users put containers filled with water in the cabinet, which is not often electrified, resulting in the electrical components and metal surfaces of the disinfection cabinet being oxidized by moisture. If there is contact resistance at the socket of infrared heating tube, it is easy to burn the socket or other parts and shorten the service life of disinfection cabinet.
2. After using for a period of time, clean the inside and outside surfaces of the cabinet regularly to keep the disinfection cabinet clean and hygienic. When cleaning the disinfection cabinet, unplug the power plug first, wipe the inside and outside surfaces of the disinfection cabinet with a clean wet cloth, and it is forbidden to spray the disinfection cabinet with water. If it is too dirty, you can dip a wet cloth in neutral detergent first, then wipe the detergent with a clean wet cloth, and finally dry the water with a dry cloth. When cleaning, be careful not to touch the heating pipe or ozone generator.
3. Power on once a day can not only play the role of sterilization and disinfection, but also prolong the service life of the disinfection cabinet.
4. When using, if it is found that the timely heating pipe is not hot, it means that the disinfection cabinet is out of order and should be stopped and sent to the maintenance department for maintenance.
5. The disinfection cabinet should be placed horizontally in a dry and ventilated place without sundries around.