Do you need to open AC in winter？

In winter, if the windshield fogs seriously, turning on the refrigeration switch (AC) of the automobile air conditioner can effectively remove the fog. Car air conditioners are used not only in summer, but also in winter. Automobile air conditioner can not only cool, but also heat, so it is needed almost every day in winter and summer. When the refrigeration switch is turned on, the compressor will be combined, the engine will drive the compressor to run, and the refrigerant will expand and absorb heat in the evaporation box, cooling the evaporation box, and the cooled evaporation box will cool the wind blown by the blower, thus blowing cold air. But in other cases, there is no need to turn on AC.