DEFROSTING TWO-COMPARTMENT REFRIGERATOR: DEFROSTING CYCLE STARTED WHEN COOLING TIME EXCEEDS PREDETERMINED VALUE

摘要

PCT No. PCT/KR95/00149 Sec. 371 Date Aug. 26, 1996 Sec. 102(e) Date Aug. 26, 1996 PCT Filed Nov. 17, 1995 PCT Pub. No. WO96/16364 PCT Pub. Date May 30, 1996A defrosting apparatus for a refrigerator and a method for controlling the defrosting apparatus, wherein the refrigerating compartment is cooled irrespective of the internal temperature of the freezing compartment when the internal temperature of the refrigerating compartment is higher than a predetermined temperature, so that the refrigerating compartment is maintained below the predetermined temperature. The defrosting operation is carried out in accordance with the drive times of the compressor and refrigerating compartment fan when the internal temperature of the refrigerating compartment is higher than the predetermined temperature even though the compressor and refrigerating compartment fan are continuously driven. Accordingly, it is possible to improve the cooling efficiency. For the rapid refrigerating operation, the point of time when the defrosting operation for the refrigerating compartment begins is accurately determined by calculating a temperature drop gradient on the basis of a variation in the internal temperature of the refrigerating compartment. For the rapid freezing operation, the point of time when the defrosting operation for the freezing compartment begins is accurately determined by calculating a temperature drop gradient on the basis of a variation in the internal temperature of the freezing compartment. In either case, accordingly, it is possible to efficiently achieve the defrosting operation.