Ventilator with brush type blocking device

US6290456A · kind A · utility

Assignee

• LTG AKTIENGESELLSCHAFT · DE

Inventors

• Rolf Fichter · Fellbach, DE
• Ralf Widmann · Stuttgart, DE

Key dates

• Filing date: Jan 26, 2000
• Grant date: Sep 18, 2001
• Expiry date: Jan 26, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04D29/164
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fan having a rotor with a plurality of fan blades, the fan having an intake and a pressure side. A blocking device between the intake and pressure sides of the fan. The blocking device comprising a strip-like brush element with a plurality of brush sections that extend radially upwardly toward the edge of the rotor. The brush sections are spaced apart from one another along the direction from the intake to the pressure side of the fan. A cross-flow fan has spaced apart brush sections which are spaced apart in the running direction of the fan. An axial flow fan has brush sections which are spaced apart from one another transversely with respect to the running direction. The brush sections in each of the fans may also be as in the other type of fan. The brush sections may define a v-shape extending from a common block or may be in spaced apart rows or may be individual tufts and the tufts may be staggered along the length of the brush.