| 摘要 |
PURPOSE:To perform automatic and manual start and stop of hot water feeding by a water level detector through only one solenoid valve for feeding hot water to a bath by controlling the opening/closing of the solenoid valve through the opening/closing of a contact of a ratchet relay. CONSTITUTION:If a manual operation switch 17a is depressed when a solenoid valve 3 is closed, the ratchet relay 10 is inverted, the relay contact 10a is turned on and the solenoid valve 3 is opened, so that hot water feeding starts. When the water level reaches a prescribed level, a fixedly opened contact 5a is turned on and a pulsative signal is applied to the ratchet relay 10 through a capacitor 18, so that the ratchet relay 10 is inverted, the contact 10a is turned off and the solenoid valve is closed. If a switch 17b is depressed in a bath under said state, the ratchet relay 10 is inverted, the contact 10a is closed and the solenoid valve 3 is opened, so that hot water is fed independently of the water level. Hot water feeding is stopped by depressing the switch 17b again to invert the ratchet switch 10, open the contact 10a and close the solenoid valve 3. Thus the piping of hot water feeding can be simplified to constitute an automatic and manual system. |
