| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a storage type water heater that has a circuit for boiling and a circuit for a heat source, can circulate hot water in each circuit by one circulation pump, and easily improves the using efficiency of the hot water. <P>SOLUTION: The storage type water heater 70 comprises the circuit 20 for boiling and the circuit 40 for the heat source. A first common circuit CL<SB>1</SB>is disposed under a hot water storage tank 10 while one end is connected to it, a second common circuit CL<SB>2</SB>is disposed in a region positioned at the upstream side of a heat exchanger 62 for boiling and at the downstream side of a secondary use side heat exchanger 35, and a third common circuit CL<SB>3</SB>is disposed in a region positioned at the downstream side of the heat exchanger for boiling and at the upstream side of the secondary use side heat exchanger. In the second common circuit, a first control valve 22 for branching the circuit for boiling and the circuit for the heat source, the circulation pump 24, and a second control valve 26 for branching the circuit for the heat source from the circuit for boiling are arranged in this order from the upstream side. <P>COPYRIGHT: (C)2009,JPO&INPIT |
