Patent ID: 6792637
Filing Date: 2004-09-21
Classification: A47L,B01F,G05D

Abstract:
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.