| 摘要 |
PURPOSE:To prevent useless consumption of fuel and to shorten a time, by a method wherein a circulating circuit on the outlet side of a pump is connected to a circulating circuit on the outlet side of a heat exchanger through a bypass with an electromagnetic valve. CONSTITUTION:In automatic heating of a bath, after temperature and a hot water amount are set to their respective arbitrary values, an automatic switch 32 is pushed. This operation causes opening of an electromagnetic valve 22 to force water to flow, detection of a water flow switch 8 causes actuation of the hot water feeder 2 side to ignite a burner 5, and hot water having a previously fixed proper temperature flows through a bath hot water feed pipe 20. In this case, measurement of a flow rate of a flow rate sensor 21 is started, after the hot water is poured in a hopper 23, the hot water is delivered to a bath tub 19 through a return pipe 15, a bypass pipe 36, and an supply pipe 14 by means of the pressure feed force of a pump 16 being rendered operative. Namely, during the above motion, hot water is delivered to the bath tub 19 without flowing through a heat exchanger 12 for circulation having high water pass resistance. |
