Duct optimization to prevent freezing

US7967029B2 · kind B2 · utility

Assignee

• Daimler AG · DE

Inventors

• Thomas Baur · Rottenburg am Neckar, DE
• Thomas Winkeler · Saint James, US
• Peter Riedel · Holzgerlingen, DE

Key dates

• Filing date: Sep 7, 2007
• Grant date: Jun 28, 2011
• Expiry date: Nov 17, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/53
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a device for conveying liquids or moist gases through a closed duct in a vehicle fuel cell power systems, freezing of the duct is prevented by providing a part of its internal wall flow passages or flow chambers with a nonwoven material. The nonwoven material absorbs liquid in disperse form at low temperatures through its capillary action and inhibits premature ice formation.