Detection of Water Level Using "Inter-digitized" Capacitative Plates and an Emitter Plate in the Washer/Laundry Machines.
Publication Date: 2004-Sep-17
The IP.com Prior Art Database
The current washer uses a pressure switch to turn off the flow of water to the tub. The inter-digitized plates would give the microprocessor differing voltages that correspond to differing fill levels such as the super and small levels. Therefore, the microprocessor can "see" the level and predict how much hot and cold water to input in the tub for a "warm" temperature. This invention is similar to the pressure switch in that in has two levels.