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Automatic detergent dispensing system for a warewasher

  • US 6,792,637 B2
  • Filed: 01/08/2002
  • Issued: 09/21/2004
  • Est. Priority Date: 01/08/2002
  • Status: Expired due to Term
First Claim
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1. An apparatus for dispensing detergent into a warewasher which has wash cycle, said apparatus comprising:

  • a reservoir for containing the detergent;

    a flow control device which couples the reservoir to the warewasher and controls flow of the detergent into the warewasher;

    a sensor which produces a signal indicating an amount of detergent present in water within the warewasher; and

    a controller operatively connected to the flow control device and the sensor to control dispensing detergent into the warewasher, wherein the controller has a first mode of operation in which a quantity of detergent dispensed into the warewasher is determined in response to the amount of detergent indicated by the sensor, and has a second mode of operation in which a predefined quantity of detergent is dispensed into the warewasher, the controller switching between the first and second modes in response to a determination regarding reliability of operation of the sensor.

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