GB864574A - Improved refrigerator - Google Patents

Abstract

864,574. Refrigerators. GENERAL MOTORS CORPORATION. March 11, 1959 [April 1, 1958], No. 8384/59. Class 29. In a refrigerator having a freezer compartment 24 through which refrigerated air is circulated by a fan 135 which forces it into the compartment through rear top apertures 32 and withdraws it therefrom through front side and top ducts 36, 38 and over an evaporator 74 located in a horizontal passage beneath the compartment, the evaporator being defrosted by an electric heater 84, 86, the heater also supplies sufficient heat to the bottom wall of the passage to the front of the evaporator to melt any ice projecting from the inclined leading edge of evaporator fins 80. A heat conducting plate 92, (Fig. 3), is secured to the bottom wall 44 of the passage, extends forwards in front of the leading edge of fins 80, and is in thermal contact with a run of heater 84 at 94. To reduce ice adherence to the leading edges of the fins and the front part of the passage walls, the leading edges are sloped from the bottom rearwards at 88 (Fig. 1) or forwards at 90 (Fig. 3). The bottom wall 44 slopes to a drain recess 54 to which heat is applied by a bridge piece 221 receiving heat from the front runs of heater 84. The drain itself (Fig. 2) comprises a tube 58 leading from recess 54 and disposed within another tube 60 the lower end of which is closed by a removable cap 62 carrying an inner tube 66 closed at its inner end. Hot water from tube 58 flows into tube 66 through apertures 68 and runs from tube 66 through pipe 64 formed in cap 62 so that a liquid seal is formed in the drain. A heater 169 melts any ice formed adjacent fan 135. A condensate drain 161 leads from upper compartment 20. The front section 165 of the insulation between compartments 20, 24 is detachable so that the top, side and rear walls of the latter can be removed as a unit. Section 165 carries a lamp 167. The door 177 of compartment 22 carries a bin 183 and shelf 185 provided with a pivoted bail (not shown) to retain articles thereon. A vertical rack 191 for cans 193 is disposed at each side of the bin and shelf. The inner liner of door 177 has recesses forming vertical cold-air channels between the door and the bin and shelf.