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Stain removal process control method using BPM motor feedback

  • US 7,934,281 B2
  • Filed: 11/14/2005
  • Issued: 05/03/2011
  • Est. Priority Date: 11/14/2005
  • Status: Active Grant
First Claim
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1. A method for laundering a textile wash load in a washing apparatus comprising the steps of:

  • a. loading a textile wash load into a wash basket of the washing apparatus wherein the wash basket is surrounded by a stationary wash tub and is adapted to be rotated relative to the stationary wash tub by a wash basket motor;

    b. introducing a volume of concentrated chemical solution into the washing apparatus;

    c. applying at least a fraction of the concentrated chemical solution to the textile wash load through operation of a recirculation pump driven by a recirculation pump motor;

    d. rotating the wash basket relative to the stationary wash tub by activating the wash basket motor;

    e. performing a first air lock detection step to determine whether the recirculation pump is pumping air or foam; and

    f. performing a first water log detection step to detect whether the wash tub includes excess solution impinging on the wash basket, wherein the first air lock detection step and the first water log detection step are performed based on feedback of a measured operating characteristic of the recirculation pump motor and the wash basket motor respectively.

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