The Supermarket freezer is a key point of the refrigeration system equipment. According to relevant surveys, in a typical supermarket, merchandise sales account for more than 45% of the total sales. These commodities have to rely on supermarket freezers. With supermarket freezers, fresh food goes from the producer to the supermarket to ensure the freshness of the food. Many people use supermarket freezers to preserve food. But in life, we always ignore the preservation time of food in supermarket freezers. It does not mean that supermarket freezers can be permanently fresh, and the preservation time of supermarket freezers is also particular.
Generally speaking, low temperature environment can effectively inhibit the reproduction and growth of bacteria. The reproduction and growth of bacteria will be particularly slow, which can ensure that the food is temporarily stored without rotting and metamorphosis. Since the temperature of the
refrigerator is kept between 0-10 °C, although the reproduction of bacteria can be limited, it cannot be completely prevented. Some bacteria are psychrophilic, such as Yersinia, Listeria, etc., but can grow and multiply rapidly at this temperature. If you eat foods infected with these bacteria, it will cause intestinal diseases. In the
freezer of the
supermarket freezer, the temperature is generally around minus 18 ℃. At this temperature, the general bacteria will be inhibited or killed, so the food stored in it has a better preservation effect. But freezing does not mean complete sterilization, and some bacteria with strong antifreeze ability will survive. Therefore, from another perspective, if the supermarket freezer is not disinfected frequently, it will become a "hotbed" for some bacteria. Therefore, if the food is put into the refrigerator for a long time, it will definitely deteriorate and deteriorate, and the more easily spoiled food will deteriorate faster. Generally speaking, the refrigerator can only keep fresh, and can only be used as a storage room for a short time. Food stored for a long time should be placed in the freezer. However, the food in the freezer is also stored for a certain period of time, because although the frozen bacteria multiply slowly, they will deteriorate if the time is too long, and sometimes the taste will change even if it does not deteriorate. Please store it according to the expiration date of the instructions.
In addition, the food in the supermarket freezer should not be stored too much, which will cause the food's external temperature to be low and the internal temperature to be high to cause deterioration.
