Patent ID: 6634048
Filing Date: 2003-10-21
Classification: D06F

Abstract:
An automatic temperature control system for a washing machine including a mixing nozzle in flow communication with a wash tub, a hot water conduit and a cold water conduit in flow communication with the-mixing nozzle, a cold water valve controlling flow of water from the cold water conduit to the mixing valve, and a hot water valve for controlling flow of hot water from the hot water conduit to the mixing valve, said system comprising:a microprocessor; a temperature sensor configured to sense the temperature of water supplied to the wash tub and electrically coupled to said microprocessor; a cold water relay configured to be coupled to the cold water valve, said cold water relay electrically coupled to said microprocessor; a hot water relay configured to be coupled to the hot water valve, said hot water relay electrically coupled to said microprocessor; said microprocessor programmed to control operation of said cold water relay and said hot water relay so that a desired water temperature is provided in the mixing nozzle, said microprocessor further programmed to perform a pretreater function.