They need use thermometer?

Refrigerator in our life is indispensable, is closely related with our health also. Usually there will be a a refrigerator temperature control device, is mainly used to measure the temperature in the fridge. So need a thermometer in the fridge? The answer is yes, because the refrigerator inside is not a constant temperature device. Built-in refrigerator temperature control device can only tell us the average temperature of the refrigerator, but actually the refrigerator every or every corner of the temperature is not the same. So, in order to achieve different foods of different storage temperature requirements, refrigerator need to put a dedicated refrigerator thermometer. Commonly used to keep food cold storage refrigerator temperature is 4 to 8 ℃, in this environment, the vast majority of bacteria growth speed will slow down. But some are psychrophilic bacteria, such as Yale sen bacteria, liszt's bacteria under this temperature have rapid growth to breed, if infected with the bacteria such foods, it could cause intestinal disease. Refrigerator freezers, generally in the temperature of minus 18 ℃ or so, at this temperature, general bacteria will be inhibiting or killing, so this store food inside with better preservation effect. But does not equal to completely frozen sterilization, still some antifreeze ability stronger bacteria can survive. For example: n/med tuberculosis bacili, salmonella typhi, put n/med tuberculosis bacterium and salmonella typhi in minus minus 250 ℃ 193 ℃ of liquid air and liquid hydrogen, they also frozen the undead. Therefore, it is called mycobacterium tuberculosis and salmonella typhi & other; Frozen dead bacteria & throughout; 。 Most of the microorganisms to have strong ability of resistance to low temperature. Therefore, despite the freezing can longer-term save food, but food microorganism is not dead, once after temperature rise, they will continue to grow. So the fridge food, before eating must return again, otherwise the same will cause intestinal infectious diseases, and even food poisoning.