| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump hot water supply system capable of using a plurality of refrigerating cycles corresponding to a temperature of drainage water, and economically recovering heat with high efficiency by allowing only the discharged hot water to flow in a discharged hot water tank. <P>SOLUTION: This heat pump hot water supply system comprises a first refrigerating cycle 16 constituted by connecting a compressor 11, a water heat exchanger 13, a first expansion valve 14 and an air heat exchanger 15, a second refrigerating cycle 19 constituted by connecting a second expansion valve 17 and a heat exchanger 18 for recovering heat in a state of being in parallel with the first expansion valve 14 and the air heat exchanger 15, a hot water storage tank 31 for storing hot water, the discharged hot water tank 70 for storing the discharged hot water after used in an use place 50, comprising the heat exchanger 18 for recovering heat, a discharged hot water level sensor 71, a discharged hot water temperature sensor 72, an outside air temperature sensor 73, and a control means 90 selecting the first or second refrigerating cycle 16, 19 on the basis of the amount and temperature of the discharged hot water in the discharged hot water tank. <P>COPYRIGHT: (C)2008,JPO&INPIT |
