Condensation dryer with a heat pump and recognition of an impermissible operating state and method for the operation thereof

US8484862B2 · kind B2 · utility

Assignee

• BSH Bosch und Siemens Hausgeräte GmbH · DE

Inventors

• Thomas Nawrot · Berlin, DE
• Ulrich Nehring · Berlin, DE

Key dates

• Filing date: Jul 28, 2009
• Grant date: Jul 16, 2013
• Expiry date: Jul 27, 2030

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06F2103/52
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A condensation dryer having a temperature sensor to measure a temperature of a coolant; a first comparator to determine a temperature difference between a first temperature of the coolant and a second temperature of the coolant that is measured after a period of time and to compare the temperature difference with a limiting temperature difference stored in a controller; a counter to ascertain a number of occurrences in which the temperature difference is greater than or equal to the limiting temperature difference; and a second comparator to compare the number of occurrences with a limiting number stored in the controller and to evaluate a number difference between the number of occurrences and the limiting number with respect to the presence of an impermissible operating state. A first impermissible operating state is indicated if the number difference is greater than or equal to a value stored in the controller.