| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce manufacturing cost and stabilize the temperature of hot-water supply in starting and stopping of bath hot water supply. <P>SOLUTION: The hot-water storage type water heater having a hot-water supply mixing valve and a bath mixing valve is equipped with a bath heat exchanger in a hot-water storage tank, a bath forward pipe and a bath return pipe for connecting the bath heat exchanger and a bathtub, and a four-way valve on the bath return pipe. A water flow route is switched by turning a valve element in the four-way valve, a first valve port of the four-way valve is connected to a hot-water supply pipe communicating with the bath mixing valve, a second valve port is connected to a bathtub side of the bath return pipe, a third element port is connected to the bath forward pipe side, and the fourth valve port 4 is connected to the bath heat exchanger side of the bath return pipe. The hot-water storage type water heater is equipped with a first valve element position for closing all of the valve ports, a second valve element position communicating with the first valve port and the second valve port, a third valve element position communicating with the first valve port, the second valve port, and the third valve port, the fourth valve element position communicating with the second valve port, the third valve port, and the fourth valve port, and a control part for switching the fifth valve element position communicating with the second valve port and the fourth valve port. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
