To provide a refrigerator-freezer manufacturable at low cost and capable of providing large power-saving effect by suppressing the rise of temperature in a chamber without using an electric heater requiring large power consumption in defrosting.
This refrigerator-freezer comprises a bypass pipe 7 connecting a part between a compressor 1 and a condenser 3 and a part between a capillary tube 4 and an evaporator 5 formed by connecting in series the compressor 1, the condenser 3, a capillary tube 4, the evaporator 5, and a liquid refrigerant tank 6 in that order and a three-way valve 2 switching the refrigerant passage to the bypass valve 7 in a defrosting operation. The refrigerant-freezer is controlled so that the three-way valve 2 is switched for the defrosting operation after the rotational speed of the compressor 1 is increased.
TAKEDA TOMOAKI
NAKAMURA HIDEYUKI
SHIZUTANI MITSUTAKA
MATSUSHIMA HIROAKI
Manabu Inoue