Patent ID: 9568224
Date: 2017-02-14
CPC Classifications: F24D,F25B,Y02B

Claim:
1. A heat pump apparatus comprising: a refrigerant circuit in which a refrigerant circulates, and which is configured by sequentially connecting a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and a third heat exchanger, and connecting a bypass flow path bypassing the third heat exchanger between the second heat exchanger and the compressor; a fluid circuit in which a fluid circulates, and which is configured by sequentially connecting the third heat exchanger, the first heat exchanger, and a radiator; a flow path switching device that switches between making the refrigerant flow through the third heat exchanger and making the refrigerant flow through the bypass flow path without flowing through the third heat exchanger; and a control device configured to set the flow path switching device to make the refrigerant flow through the third heat exchanger based upon an operating frequency of the compressor being lower than a predetermined frequency, and an opening degree of the expansion valve being a minimum degree, and a temperature of a predetermined heat exchange agent being lower than a predetermined first temperature, wherein the second heat exchanger is configured to make the refrigerant heat-exchanged with the predetermined heat exchange agent, and wherein the expansion valve is located in series directly between the first heat exchanger and the second heat exchanger.