Patent · US Expired

Process for eliminating foam in the lye container of a drum washing machine

US7340792B2 · kind B2 · utility

4Cited by

8References

11Claims

0Family size

Assignee

BSH Bosch und Siemens Hausgeräte GmbH · DE

Inventors

Gundula Czyzewski · Berlin, DE
Ingo Schulze · Panketal, DE

Key dates

Filing date	Jan 28, 2005
Grant date	Mar 11, 2008
Priority date	—
Expiry date	Nov 13, 2025

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06F39/087
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A sensor for determining the level of the liquid in the lye container for removing foam in the lye container of a drum washing machine with a lye discharge system arranged on the floor of the lye container with a lye pump during a program step, which is provided for dehydrating the lye container. Its sensor signal P is recorded during operation of the lye pump. According to the present invention the sequence p/t of the sensor signal contains a component Δp/Δt, whereof the presence indicates the presence of foam in the measuring region. Further, in the presence of the component a foam treatment measure suiting the type of component is introduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.