| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type hot water supply device capable of improving a COP (coefficient of performance). <P>SOLUTION: The hot water supply device has an economy mode carried out in the following manner. In a process of heating hot water stored in a hot water tank 37A, when an exit water temperature of the hot water stored in the hot water tank 37A is lower than a first target value, the pump output of a pump 31 is minimized by a controlling device 42 until the exit water temperature of the hot water stored in the hot water tank 37A reaches the first target value. When the exit water temperature of the hot water stored in the hot water tank 37A reaches the first target value, the pump output of the pump 31 is gradually increased to the maximum by the controlling device 42 while keeping the exit water temperature of the hot water stored in the hot water tank 37A to the first target value. When the exit water temperature of the hot water stored in the hot water tank 37A reaches a final target value and the entrance water temperature of the hot water stored in the hot water tank 37A reaches a desired target value, heating of the hot water stored in the hot water tank 37A is terminated. <P>COPYRIGHT: (C)2012,JPO&INPIT |
