Automatically controlled washing machine

US5647232A · kind A · utility

Assignee

• Bosch-Siemens Hausgeraete GmbH

Inventors

• Frank Böldt · Brieselang, DE
• Ingo Schulze · Panketal, DE
• Harald Moschütz · Großbeeren, DE
• Marianne Rohl · Mülheim an der Ruhr, DE

Key dates

• Filing date: Apr 8, 1996
• Grant date: Jul 15, 1997
• Expiry date: Apr 8, 2016

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06F2103/46
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

An automatically controlled washing machine includes a laundry drum and a drive motor which drives the laundry drum at a plurality of different speeds for washing, rinsing and spinning. The speed of the drive motor is adjustable with an rpm control circuit and is determinable in accordance with set-point and actual rpm values. A control circuit of the washing machine can receive a signal during a spin cycle, which is a measure for an undesired braking of the drum (for instance from suds production) and is determined by a mutual ratio of the following operating parameters of the drive motor: the set-point rpm, the actual rpm, and a load-dependent electrical variable, such as a motor current.