COLD AIR SUPPLY DEVICE OF AN INDIRECT-TYPE REFRIGERATOR FOR EXECUTING INTEGRALLY VENTILATION AND INTERMITTENCE OF THE COLD AIR BY USING AN EXPANSION/CONSTRICTION UNIT, PERMANENT MAGNETS, AND AN ELECTROMAGNET

摘要

PURPOSE: A cold air supply device of an indirect-type refrigerator is provided to be capable of functioning as a blower fan, a motor, and a damper by repeating expansion/constriction of a cold air tube with one electromagnet and plural permanent magnets and accordingly pumping the cold air to a storage chamber. CONSTITUTION: A cold air supply device(60) of an indirect-type refrigerator is composed of a cold air tube(62); an expansion/constriction unit(64) of which one end is fixed and the other end is free to expand or shrink the cold air tube in moving the free end; permanent magnets(70,72) mounted in the other end of the expansion/constriction unit; an electromagnet(74) for moving the permanent magnet by attraction or repulsion; and an opening and closing plate(78) connected movably to the cold air tube to open or close the cold air tube in expanding and constricting the cold air tube.