Radial fan and a high-pressure cleaning device having a radial fan

US8813689B2 · kind B2 · utility

Assignees

• Punker GmbH · DE
• Alfred Kärcher GmbH & Co. KG · DE

Inventors

• Ernst Claussen · Steinfeld, DE
• Joachim Peetz · Ascheffel, DE
• Gerd Wegner · Neviges, DE
• Ralph Seitter · Backnang, DE
• Lutz Bauer · Spaichingen, DE

Key dates

• Filing date: Nov 13, 2007
• Grant date: Aug 26, 2014
• Expiry date: Nov 10, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04D29/422
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A centrifugal fan with a pot-like impeller and with a housing, having a first circumferential wall region with an arc-like curvature which extends directly along the impeller. The housing includes in a direction of rotation of the impeller a second circumferential region with a radial distance from the impeller increasing spirally up to an outlet region. The housing includes in an opposite direction a third circumferential wall region extending to the outlet region, having an S-curvature and including a sub-region curved in the same direction as the first circumferential wall region forming a flow baffle element. Two side walls cover the axial end faces of the impeller wherein one of the side walls extends into the pot-like impeller and divides its interior into a first suction chamber having an intake and a second suction chamber. The outlet region expands in cross-section in the outlet flow direction.