Ebm-papst Mulfingen Gmbh & Co Kg

Josef Rathgeb

Oliver Haaf

Daniel Gebert

Jens Müller

Manuel Vogel

Florian Friedlein

Lucas Schellmann

Thomas Jäger

Ventilating fan

A radial fan half-spiral housing has a pressure chamber extending in the circumferential direction about an axial intake opening () to a radial blow-out opening (). The pressure chamber, as viewed in the circumferential direction, is subdivided into at least one beginning portion (), one central portion (), and one blow-out portion. The intake opening () determines a central axis of rotation for a fan wheel. An averaged half-spiral housing radius, as viewed about the axis of rotation (), varies in the beginning portion (), the center portion (), and the blow-out portion (). It reaches a maximum in the blow-out portion (). The center portion () of the half-spiral housing radius is reduced in a region determining a maximum height H(&#x3b4;,z) of the half-spiral housing () compared to a logarithmic spiral radius (r).

Half-spiral housing

The disclosure relates to a flow-conducting grille for arranging on the suction side of a fan, with a grille web structure which comprises radial webs spaced apart in the circumferential direction and coaxial circumferential webs spaced apart in the radial direction, wherein the radial webs of at least one quadrant of the flow-conducting grille are curved in each case over their radial extension, viewed in the circumferential direction, towards a predetermined radial plane extending from a central axis of the flow conducting grille.

Flow-conducting grille for arranging on a fan

A rooftop-mounted air-conditioning installation, in particular for the roof of a bus, has at least having a condenser unit and an evaporator unit. It has an air-flow duct with at least one air intake opening and one air discharge opening. A heat exchanger and a radial fan are arranged in the air-flow duct between the air intake opening and the air discharge opening. An axis of rotation of a fan wheel of the radial fan is oriented parallel to an air flow main direction that extends through the air-flow duct from the at least one air intake opening through the heat exchanger to the radial fan.

Rooftop-mounted air-conditioning installation

Half spiral casing

Flow grid

Growing community of inventors

Jagstzell, Germany

Josef Rathgeb