Cleaning and liquid contact with solids – Apparatus – Automatic controls
Patent
1985-11-22
1988-07-12
Hornsby, Harvey C.
Cleaning and liquid contact with solids
Apparatus
Automatic controls
134 94, 68207, 68 12R, 222 56, B08B 302
Patent
active
047563214
ABSTRACT:
A chemical dispenser and controller for industrial dishwashers. The level of detergent concentration in the dishwasher wash water is measured in logarithmically scaled unit, and the target detergent concentration level is specified in similar units. The dishwasher's controller converts wash water conductivity measurements into logarithmically scaled detergent concentration measurements. The unit of measurement for these logarithmically scaled measurements are called "Beta" units. The controller also monitors the detergent concentration level and generates an alarm if the measured detergent concentration fails to increase by at least a predefined amount while the detergent feeding mechanism is turned on. Another feature of the controller is that it generates an alarm if the measured detergent concentration fails to reach its target level after the detergent feeding mechanism has been on for a predetermined time period. Further, the controller includes different control strategies for conveyor and batch type dishwashers, including a control method for conserving rinse agent and detergent in batch type dishwashers.
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Hosking Stephen G.
Livingston James W.
Beta Technology, Inc.
Hornsby Harvey C.
Stinson Frankie L.
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