| 摘要 |
PURPOSE: To change over a defrosting method according to a defrosting load when a cooling system is in an OFF state and reduce power supply to a heater by carrying out defrosting with a heat load in a refrigerating chamber while preventing cold air in a freezing chamber from circulating to operate a cooling fan when a defrosting load is low, and carrying out defrosting with the heater when a defrosting load is high. CONSTITUTION: A cooling system comprises a cold air circulation controlling means 21 for controlling the circulation of cold air to a freezing chamber 18, a cold air blowing means 10 for blowing cold air cooled by an evaporator and a defrosting load detecting means for detecting a defrosting load. In the case where the cooling system is in an OFF state, the inflow of cold air is prevented by the cold air circulation controlling means 21 in the freezing chamber, thereupon the cold air blowing means 10 is operated when a defrosting load detected by the defrosting load detecting means is high, while power is supplied to a defrosting heater 6 when a defrosting load is low. |
