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- Google Patents.
8 Fun Facts Watts Automatic Water Heater Shut Off Valve | Watts Shut Off Valve Repair Kit
- With SYLAX brand, the Company is renowned for its experience and expertise in butterfly valve manufacture. DESBORDES is the standard-bearer for pressure reducers. The quality and longevity of our reducers is renowned throughout our profession. Socla is also a very well recognised brand in the market as the specialist of the NON-RETURN VALVES. - Source: Internet
- Discussion of the Prior Art An ever-present hazard of appliances such as automatic washing machines, water heaters, and the like, is the occurrence ofa malfunction, such as aleak or overflow, which, if not stopped immediately, will cause flooding. This hazard is particularly serious when the appliance is located within a dwelling and left unattended for extended periods as are many household ap– pliances of this kind. - Source: Internet
- BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates the present water shut-off system connected to an automatic washing machine; FIG. 2 is a block diagram of the system; - Source: Internet
- Water shut-off system 12 includes solenoid shut-off valves 22 connected in the water inlets 14, 16, an electrical water sensor 24 possessing an electrical characteristic which has a normal value when the sensor is dry and another value when the sensor is wet, and a detection circuit 26 responsive to the sensor characteristic. The detection circuit is connected to the sensor and valves for retaining the valves open when the sensor characteristic value is normal and closing the valves in response to deviation of the characteristic value from normal. In the particular embodiment illustrated, the water sensor 24 is a capacitor whose electrical characteristic, which is varied by wetting, is the leakage resistance or simply the ability of the capacitor to be charged. The detection circuit 26 comprises an oscillator 28 whose oscillation is controlled by the sensor capacitance and which, in turn, controls a switch 30 for actuating the solenoid shut-off valves 22. The leak detection curcuit is electrically powered form the appliance 10 through an electrical connection 31 between the appliance and detection system and the appliance on-off switch, such that power to the circuit is cut off when the appliance is turned off. - Source: Internet
- Wetting of the sensor changes the leakage resistance of the detector and thereby the operating state of the relaxation oscillator. This change in state interrupts the trigger pulses, thus deenergizing the switch to close the shut-off valve and cut off the water supply to the appliance. According to a feature of the invention, the water sensor is provided with capillary means in the form of porous wick-like dielectric material about and/or between the sensor capacitor plates for inducing wetting of the plates to alter the capacitor leakage resistance when the capacitor is contacted by water from the appliance. - Source: Internet
- In use, the water sensor 24 is placed below or adjacent the applicance 10 so as to be rapidly wetted in the event the aappliance developes a’leak or overflows. When the sensor is dry, the leak detection circuit 26 retains the solenoid shut-off valves 22 open so long as the appliance is turned on. If the appliance is turned off or the water sensor becomes wet because of a leak or overflow, the valves are de-energized and closed to block water flow to the appliance. - Source: Internet
- SUMMARY OF THE INVENTION The automatic water shut-off system of the present invention has a solenoid shut-off valve for connection in each water inlet to the appliance to be protected against flooding, and an electrical leak detection system for actuating the valve. This leak detection system includes and electrical water sensor having an electrical characteristic which varies when the sensor is wetted and means for actuating the shut-off valve to closed position in response to such change in the sensor characteristic. The sensor is placed below the appliance in a position such that the sensor is certain to be wetted in the event of a leak or overflow from the appliance. - Source: Internet
- ’ RELAXATION TR/GGEK SCR 0R 50LENO/0 SENSOR OSCILLATOR PULSE RELAY I/ALVE RECTIFIER [35 v VALVE *0 Ac VOLTAGE j 30 m i /2 CR2 (R3 SOLENOID CR4 (/25 Mil/E I -n w J h INVENTOR 36 LAWRENCE C. Bean/Iv Arrows) BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates generally to automatic water shut-off systems and more particularly to such a system for cutting off the water supply to an appliance such as an automatic washing machine, water heater, or the like, in the event of a leak, overflow or other malfunction which may cause flooding. - Source: Internet
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