| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump type air-conditioning water heater in which effective use of a bypass circuit having a subcooler is achieved even in hot water supplying operation using cooling exhaust heat.SOLUTION: A heat pump type air-conditioning water heater includes a first bypass circuit 30 which is branched from a part between a heat source side expansion valve 4 and a subcooler 5 and communicated with a compressor 1 via a bypass expansion valve 9 and the subcooler 5, a second refrigerant circuit 21 which is branched from a part between the compressor 1 and a four-way valve 2 and communicated with a part between the subcooler 5 and a user-side expansion valve 6 via a heat exchanger 22 for hot water and an expansion means 23 for hot water, and a second bypass circuit 40 which is branched from a part between the heat source side expansion valve 4 and the subcooler 5, and communicated with a part between a first opening/closing means 41 and the user-side expansion valve 6 via a second opening/closing means 42. When the cooling operation is executed by an indoor heat exchanger 7, and the hot water generating operation is executed by the heat exchanger 22 for hot water, the first opening/closing means 41 is closed, the second opening/closing means 42 is opened, and the heat source side expansion valve 4 are fully closed. |
