| 摘要 |
PURPOSE:To ensure the effective control for temperatures of hot water of a bathtub by providing a valve to a return route of hot water from a heat exchange part to close said return route in response to the result of hot water temperature less than a fixed level of a temperature detection sensor and stopping a circulating route when the temperature of a hot water supplier is lower than a fixed level. CONSTITUTION:The amount of supplied water is detected by a level sensor 11. When the water is supplied up to its limit, a solenoid valve 12 is closed to stop automatically the supply of water. At the same time, a valve 10 is opened to circulate the hot water within a hot water supply route 7. In this case, if a hot water supplier 1 is ignited, the temperature of the hot water is increased up to a high level within a pipeline. This high temperature is detected by a temperature sensor 6. This state is kept until the sensor 6 works. In case the suppler 1 is not ignited yet, the temperature is not increased within the pipeline and therefore not detected by the sensor 6. In this case, a hot water detection sensor 8 substitutes the sensor 6 and closes the valve 10 to stop the circulation of the hot water. At the same time, a lamp, a buzzer, etc. on an operation board 13 give an alarm. Thus the factor for the defective ignition is eliminated to secure the actuation again. |
