Patent ID: 9618234
Date: 2017-04-11
CPC Classifications: F24D,F25B,Y02B

Claim:
1. A refrigeration cycle apparatus comprising: a compressor that compresses a refrigerant and is provided with an injection portion; a radiator that allows the refrigerant compressed by the compressor to radiate heat; an expansion mechanism that expands the refrigerant cooled by the radiator; an evaporator that evaporates the refrigerant expanded by the expansion mechanism and discharges the evaporated refrigerant toward the compressor; an injection passage connecting the injection portion of the compressor to a branched portion located between the radiator and the expansion mechanism, the injection passage being configured to allow a part of the refrigerant cooled by the radiator to pass through the injection passage; a water circuit through which water flows, wherein the water is heated in the radiator by the refrigerant; a flow rate regulator that is disposed in the injection passage and regulates a flow rate of the refrigerant, which flows from the branched portion into the injection passage, by adjustment of an opening degree of the flow rate regulator; and a sub heat exchanger that comprises a first low-temperature side flow passage and a first high-temperature side flow passage, cools the water flowing in the first high-temperature side flow passage, and heats the refrigerant flowing in the first low-temperature side flow passage by exchanging heat between the refrigerant and the water before the water is heated in the radiator, wherein the sub heat exchanger is disposed in the injection passage and is located between the flow rate regulator and the injection portion of the compressor, the water circuit includes a hot water storage tank and a heat source side water circuit, the heat source side water circuit has an upstream end and a downstream end each connected to the hot water storage tank, the first high-temperature side flow passage of the sub heat exchanger forms a part of the heat source side water circuit of the water circuit, and the first low-temperature side flow passage of the sub heat exchanger forms a part of the injection passage.