Patent ID: 7536869

Claim:
A vapor compression refrigerating apparatus comprising: a refrigerating cycle having a compressor device, a condenser device, a depressurizing device, and an evaporator, wherein refrigerant is circulated in the refrigerating cycle to perform a cooling operation; a Rankine cycle having a pump for pumping out the refrigerant, a heating device for heating the refrigerant by use of waste heat from a heat generating device, an expansion device, and the condenser device, wherein the refrigerant is circulated in the Rankine cycle to generate a driving force at the expansion device by expansion of the refrigerant heated by the heating device; and a heat pump cycle having a pump bypass passage bypassing the pump, an orifice provided in the pump bypass passage and means for circulating the refrigerant from the compressor device through the heating device, the pump bypass passage and the condenser device such that a heat absorbing operation is performed at the condenser device and a heating operation is performed at the heating device, the heat generating device being heated by the heating operation at the heating device; wherein the refrigerant flowing from the heating device to the condenser device is depressurized and expanded in the pump bypass passage, and operation of the pump is stopped during operation of the heat pump cycle.