Carl Freudenberg Kg

Maik Sieh

Uwe Haefner

Karsten Schulz

Juergen Becker

Hans Wiegand

Juergen Klaus

Sascha Schumacher

Felix Herberg

Marcel Beisel

Morfula Chirnside

Sascha Blauth

Luca Ricuperati

Sergio Papa

Ilaria Aureli

Giacomo Menzio

Domenico Strozzi

Morfula Chimside

Günther Beck

Jürgen Klaus

Jürgen Becker

Güngör Bastan

Siegfried Sonn

The invention relates to a method for operating a ventilation system for indoor air in an indoor space, in particular a motor vehicle. The method comprises the steps of: providing a fresh air portion of supplied fresh air and a recirculated air volume flow according to a predetermined or selected operating strategy; determining settings for a recirculated air actuator for adjusting a fresh air portion, in particular a recirculated air flap or a recirculated air valve, and a fan power of a fan for adjusting a mixed air volume flow (Q) of supplied recirculated and fresh air; increasing the fresh air portion and/or the mixed air volume flow (Q) as a function of a pathogen filtration efficiency of a cabin filter and a predetermined contamination prevention volume flow as a pathogenic indoor concentration limit value (C) for a maximum concentration of pathogenic aerosols.

Method and device for operating a ventilation system for air in an indoor space

A filter arrangement includes: a filter element in a first filter stage, the filter element having a filter material for filtering an air stream; a housing for receiving the filter element; and a circumferential gel seal arranged between the filter element and the housing in order to seal the filter element from the housing.

Filter arrangement with a gel seal and use of such a filter arrangement as an interior air filter

A filter element includes: a frame having a peripheral elastomer body in which a reinforcement element is embedded; and a filter pocket. The frame is connected to an opening in the filter pocket with a connection established integrally by the elastomer body. In an embodiment, the elastomer body is molded on the filter pocket.

Pocket filter element

A filter cartridge includes a filter medium configured as an elongated bellows having a first and a second longitudinal end. The bellows are connected at the first longitudinal end to a base and at the second longitudinal end to a top. The bellows enclose a central passage. The bellows are configured in a shape of a prism.

Filter cartridge

Growing community of inventors

Sandhausen, Germany

Maik Sieh