Axial ventilator having noise reducing fan wheel blades

US11391282B2 · kind B2 · utility

Assignee

• ebm-papst St. Georgen GmbH & Co. KG · DE

Inventors

• Roland Keber · Geesthacht, DE
• Tobias Sieger · Geisingen, DE
• Wolfgang Laufer · Schenkenzell, DE
• Jürgen Herr · St. Georgen, DE
• Arnold Schulde · Villingen-Schwenningen, DE
• Georg Eimer · St. Georgen, DE
• Martin Muller · Chicago, US
• Dominik Haas · Remshagen, DE
• Simon Hoppe · St. Georgen, DE
• Julien Grilliat · Villingen-Schwenningen, DE
• Johannes Dannecker · Schönach, DE
• Clemens Günter · Schramberg, DE

Key dates

• Filing date: Feb 24, 2020
• Grant date: Jul 19, 2022
• Expiry date: Jun 24, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2240/307
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An axial ventilator (1) has a housing (2) and a fan wheel (3) arranged in the housing (2) to generate an axial air flow through the housing (2). The fan wheel (3) has multiple fan wheel blades (4) that extend radially outward from a hub (5) up to a respective blade tip (8). The blades extend spaced apart from an inner wall of the housing (2) via a head gap (12). The fan wheel blades (4) have boreholes (7) along the respective blade tip (8).