Fan diffuser having a circular inlet and a rotationally asymmetrical outlet

US10072671B2 · kind B2 · utility

Assignee

• ebm-papst Mulfingen GmbH & Co. KG · DE

Inventors

• Markus Engert · Lauda, DE
• Erik Reichert · Boxberg, DE
• Oliver Haaf · Kupferzell, DE
• Christian Pfaff · Künzelsau, DE
• Marc Schneider · Bad Ems, DE
• Jürgen Schöne · Bad Mergentheim, DE
• Katrin Bohl · Künzelsau, DE
• Sven Beck · Assamstadt, DE
• Dieter Best · Ingelfingen, DE
• Tobias Ehmann · Neuenstein, DE
• Alexander Frank · Pfedelbach, DE
• Erhard Gruber · Satteldorf, DE
• Matthias Maschke · Kupferzell, DE
• Thomas Sauer · Rellingen, DE

Key dates

• Filing date: Dec 16, 2011
• Grant date: Sep 11, 2018
• Expiry date: Apr 16, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2250/52
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A diffuser (3) for a fan (2) of axial, radial or diagonal type of construction, has an inlet opening (10) and having an outlet opening (20) for a gaseous medium which flows through a diffuser interior (I), which is enclosed by an outer housing (30), in an axially oriented main flow direction (S) from the inlet opening (10) to the outlet opening (20). The cross section of the diffuser interior (I) increases from the cross section (11) of the inlet opening to the cross section (21) of the outlet opening (20), wherein the outer housing (30) forms an outer diffuser part (AD) which delimits the diffuser interior (I) to the outside. Along the main flow direction (S), the cross section of the outer diffuser part (AD) changes from a circular cross section (31) at the inlet opening (10) to a non-circular cross section (32) at the outlet opening (20).