Patent ID: 6257254
Filing Date: 2001-07-10
Classification: B08B

Abstract:
A washer comprising:a stationary, walk-in washing chamber having a floor, items to be washed in the chamber being wheeled onto the washing chamber floor;spray nozzles disposed in the washing chamber to spray a cleaning fluid over a load to be cleaned;a sump below the floor of the washing chamber which collects the cleaning fluid sprayed over the load, the sump being a shallow sump, of less than 12 cm in depth;a self priming sump pump external to the sump which operates at a low head of fluid to pump at least 250 l/min of cleaning fluid from the sump;a dip tube which runs between the sump and the sump pump, the sump having a sloping floor which directs the cleaning fluid collected in the sump to the dip tube;a cleaning fluid reservoir;a high pressure pump for pumping at least 250 l/min of cleaning fluid from the cleaning fluid reservoir to the spray nozzles;a temperature booster which raises the temperature of the cleaning fluid from the cleaning fluid reservoir to a preselected wash temperature before the cleaning fluid is delivered to the spray nozzles; anda fluid injection system connected with the cleaning fluid reservoir for accurately delivering a preselected quantity of a concentrated cleaning fluid to the cleaning fluid reservoir.