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Automatic temperature control for clothes washer

  • US 6,634,048 B1
  • Filed: 06/30/1999
  • Issued: 10/21/2003
  • Est. Priority Date: 06/30/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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