Automatic detergent dispensing system for a warewasher

An apparatus dispenses detergent into a warewasher from a reservoir (50) wherein a flow control device (54) controls the flow of the detergent. A sensor (not shown) measures the electrical conductivity of water within the warewasher (10) and produces a conductivity measurement. A controller (32) ope...

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Bibliographic Details
Main Authors UHEN, DAVID A, REICHOLD, KURT A
Format Patent
LanguageEnglish
Published 28.09.2007
Edition7
Subjects
COFFEE MILLS
CONTROLLING
DOMESTIC ARTICLES OR APPLIANCES
DOMESTIC WASHING OR CLEANING
FURNITURE
HUMAN NECESSITIES
MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PHYSICS
REGULATING
SPICE MILLS
SUCTION CLEANERS IN GENERAL
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
TRANSPORTING
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Summary:An apparatus dispenses detergent into a warewasher from a reservoir (50) wherein a flow control device (54) controls the flow of the detergent. A sensor (not shown) measures the electrical conductivity of water within the warewasher (10) and produces a conductivity measurement. A controller (32) operates the flow control device (54) in a first mode in which the quantity of detergent dispensed into the warewasher (10) is determined in response to the electrical conductivity of the water. If the conductivity measurement is determined to be unreliable, the controller operates in a second mode in which a predefined quantity of detergent is dispensed into the warewasher (10). The reliability of the conductivity measurement is determined based on the amount that the conductivity changes upon detergent being added to the warewasher.
Bibliography:Application Number: NZ20020533881