Impeller wheel for diagonal or radial fans, injection molding tool for manufacturing such an impeller wheel, and device comprising such an impeller wheel

US10550854B2 · kind B2 · utility

Assignee

• ZIEHL-ABEGG SE · DE

Inventors

• Frieder Lörcher · Braunsbach, DE
• Andreas Gross · Solingen, DE
• Sandra Hub · Pfedelbach, DE
• Lothar Ernemann · Heilbronn, DE
• Georg Hofmann · Lauffen am Neckar, DE

Key dates

• Filing date: May 5, 2015
• Grant date: Feb 4, 2020
• Expiry date: Jul 19, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2250/70
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An impeller wheel for fans has a bottom disc, a cover disc, and three-dimensionally shaped blades connected to the bottom disc and the cover disc. The bottom disc, cover disc, and the blades form a one-piece part. The blades have a leading edge and a trailing edge, wherein the leading edge and the trailing edge each have a median diameter. In a projection onto a cylinder that is coaxial with a rotation axis of the impeller wheel and has a diameter matching a median diameter of the trailing edge or of the leading edge, a first extension of the trailing edge and/or the leading edge is positioned at a first angle and a second extension of the trailing edge and/or the leading edge is positioned at a second angle relative to a line parallel to the rotation axis. At least one of the first and second angles is different from 0°.