1, generally speaking, it is most appropriate to turn the temperature of the refrigerator to 4~6 for a refrigerator with 7 grades. 2. For the refrigerator with the fifth gear, it is most appropriate to turn the temperature control switch of the refrigerating room to the third to fourth gear. Suggested treatment: 1, the temperature of the general refrigerator freezer should be controlled at 2~8 degrees Celsius. If it is lower than 0 degrees Celsius, the refrigerator will start to freeze, so it is more appropriate to adjust the gear of the 7-gear refrigerator to 4~6. If it is a 5-gear refrigerator, it is to use 3 or 4 gears, which can ensure that the refrigerator will not freeze and the food will continue to be refrigerated. If the temperature is not properly adjusted, there will be ice in the freezer, which will not only destroy the stored food, but also reduce the service life of the refrigerator. 2. Some refrigerators have zero gear, which means to turn off refrigeration. The larger the number of gears, the lower the actual temperature. When setting the gear, it should be adjusted according to the actual ambient temperature. The higher the ambient temperature, the smaller the gear number should be, and the lower the ambient temperature, the larger the gear number should be. 3. In addition, hot food can be put in the refrigerator after it is cooled, so as to avoid generating a large amount of water vapor to condense inside the refrigerator, resulting in freezing inside the refrigerator; Food with high moisture content should be wrapped in a fresh-keeping bag before being put into the refrigerator, so as to prevent the inside of the refrigerator from freezing.