If the refrigerator thermostat is mechanical, the digital gear size of the thermostat should be adjusted according to the seasonal environmental temperature, and it should be adjusted at a smaller digital gear in summer, at a medium gear in spring and autumn, and at a larger digital gear in winter, so as to keep the freezing room temperature at about-18, and at10 degrees, preferably at 4-8 degrees. It is suggested to put a thermometer in the refrigerator for actual measurement. If the temperature is too high, turn up the digital file. If the temperature is low, turn down the digital gear.