JPS6475870A - Ice making pan for refrigerator - Google Patents

Abstract

PURPOSE: To easily separate transperent ice from opaque ice by forming an ice making tray in a double structure having upper and lower parts, forming small holes on the lower surfaces of the respective cells of the upper ice making tray, surrounding completely the upper ice making tray by the lower ice making tray, forming a water reservoir between the upper and lower ice making trays and thermally insulating the periphery of the lower ice making tray. CONSTITUTION: A lower ice making tray 11 surrounds the respective cells of an upper ice making tray 10 from its lower side. The periphery and the lower surface of the ice making tray are surrounded by a heat insulating ice making tray bearer 9. Since cold air flows only on the upper surface of the upper ice making tray, water begins to freeze from its upper surface and gradually freezes to the lower parts of the cells. At this time, impurities in water fall due to their self-weight, so that they move downward in unfrozen water and finally fall into a water reservoir 12 from the small holes 10a on the bottom surface of the upper ice making tray 10. Accordingly, completely transparent ice is obtained in the cells of the upper ice making tray 10. Finally, water in the water reservoir 12 in which the impurities are stored freeze as opaque ice to finish an ice making operation.