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Cleaning system for a washer

  • US 6,257,254 B1
  • Filed: 11/14/1997
  • Issued: 07/10/2001
  • Est. Priority Date: 11/14/1997
  • Status: Expired due to Term
First Claim
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1. 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; and

    a 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.

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