Carl Freudenberg Kg

Heinz Reinhardt

Juergen Guenther

Thomas Stoesser

Robert Bader

Christopher Klatt

Christoph Malig

Alexandra Lazarevic

Rosemarie Kurzer

Richard Borris

A filter medium including a carrier layer and a microfiber layer applied thereon is characterized in that, with respect to the aim of providing a filter medium which has a relatively low pressure drop, and at the same time a good fraction separation rate and excellent dust storage capacity, the carrier layer has first fibers, which are designed as endless bicomponent fibers and spunbonded fibers, and the microfiber layer has second fibers, which are designed as endless melt-blown fibers.

Filter medium for particulate filtration

A method of providing error correction to flow velocity readings of a fluid flowing through a filter arrangement for monitoring the service life of the filter, wherein a filter arrangement, comprising a filter and a sensor device is arranged downstream of the filter, the sensor device including at least one measuring sensor for detecting the flow velocity of the fluid which flows through the filter, and a further measuring sensor for measuring the air humidity of the fluid which flows through the filter. A reading of said second sensor element provides an error correction to the first sensor element.

Filter arrangement

A method of monitoring the service life of a filter () in a filter system equipped with a fan, in particular a filter () in an air conditioning system of a motor vehicle, the instantaneous air speed () preferably being measured on each startup of the system using a sensor () downstream from the filter (), compared to the reference air speed (R) from the unloaded filter (), and transmitted to a service computer and/or indicated on a display, and the need to replace the filter being signaled when this value falls below a predetermined threshold or threshold range of the instantaneous air flow rate ().

Method and device for monitoring the service life of a filter

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Edingen, Germany

Heinz Reinhardt