APPARATUS FOR CONTROLLING FEED RATE OF COLD AIR TO REFRIGERATING CHAMBER OF REFRIGERATOR

摘要

PURPOSE: A control system for feed rate of cold air is provided to prevent a refrigerating chamber from supercooling by mounting a device for controlling the discharge rate and direction of cold air. CONSTITUTION: A control unit outputs different signals to an electromagnet(70) depending on signals from each temperature sensor. The control unit controls the opening angle of a grill(62) to change the discharge rate and direction of cold air. In normal times, the cold air in a side duct(20) is smoothly supplied to a refrigerating chamber(R) by keeping the hollow of a louver(60) opened by the grill. The grill does not open the hollow completely by being perpendicular to the electromagnet accurately, but the control unit controls the opening angle of the grill with proper attraction and repulsive force between the electromagnet and a permanent magnet(64).