| 摘要 |
PURPOSE:To dispense with installation of a switch in a bathroom involving laying of a connecting cable for a bath heater fueled with gas or the like by a heating system wherein the heater can be started only by turning off the faucet inside the bathroom and stopped automatically upon heating adequately. CONSTITUTION:When a faucet 1 is turned on and, after filling the bathtub 2, turned off, a switch 4 acting on the flow provided in a water pipe 3 is actuated to output a signal to a control device 5. Actuated by this signal, the control device 5 outputs an output signal to an igniter 7 and a solenoid valve 6 to start the heating while a thermistor 12a in a temperature control circuit 12 provided in a heat exchanger 10 starts indirectly sensing the temperature of the water in the bathtub 2. When the thermistor 12a detects that the temperature has reached a predetermined point, a signal is outputted from the temperature control circuit 12 to the control device 5 so as to make the control device 5 close the solenoid valve 6 to shut off the gas and stop the heating. |
