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Systems and methods for controlling warewasher wash cycle duration, detecting water levels and priming warewasher chemical feed lines

  • US 6,918,398 B2
  • Filed: 07/13/2004
  • Issued: 07/19/2005
  • Est. Priority Date: 11/04/2002
  • Status: Active Grant
First Claim
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1. A warewasher system, comprising:

  • a wash area for receiving objects to be washed;

    means for delivering wash liquid to wares in the wash area during a wash cycle;

    a tank and associated heater for heating rinse water;

    a path for delivering water from the tank to the wash area;

    a flow control device for controlling water flow along the path;

    a temperature sensor for indicating a temperature of rinse water in the tank; and

    a controller connected to receive input from the temperature sensor, connected to control the flow control device and the means for delivering wash liquid, and having at least one operating mode that, if active, will carry out the following steps for the wash cycle;

    heat rinse water during the wash cycle; and

    after the wash cycle runs for a set minimum duration;

    end the wash cycle if the temperature of the rinse water has reached a desired rinse water temperature;

    continue the wash cycle if the temperature of the rinse water has not reached the desired rinse water temperature and subsequently to;

    (i) end the wash cycle if the temperature of the rinse water reaches the desired rinse water temperature;

    (ii) end the wash cycle after a set maximum duration for the wash cycle even if the temperature of the rinse water has not reached the desired rinse water temperature.

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