Eberspacher Catem Gmbh & Co. Kg

Eberspächer Catem Hermsdorf Gmbh & Co. Kg

Kai-Fabian Bürkle

Stefan Plewnia

Michael Niederer

Ahmad Asafi

Kurt Walz

Rüdiger Freitag

Florian Bitto-Golon

Jan-Michael Feustel

Marcel Lösch

Müge Pilavtepe-Christ

An electric heating device for a motor vehicle has a first housing part which surrounds a first circulation chamber and a second housing part which surrounds a second circulation chamber. The first and second circulation chambers abut against each other. A PTC heating device is interposed between the first and second housing parts. The PTC heating device comprises a first cover element covering the first circulation chamber of the first housing part and a second cover element covering the second circulation chamber of the second housing part. At least one PTC element is provided between the first and the second cover elements. An electrode field is provided on the interior side of each of the respective cover elements and is electrically conductively contacted on the PTC element.

Electric heating device

A heat-generating element of an electric heating device includes a PTC element, conductor tracks abutting surfaces of the PTC element, and an adhesive which connects the conductor tracks to the PTC element. The conductor track has several contact projections which protrude from an abutment surface of the conductor tracks. The contact projections form a contact surface which abuts the surface in an electrically conductive manner with a free space between the surface and the abutment surface, in which the adhesive is accommodated. Also disclosed is a method in which the contact projections are formed from initially planar conductor track, an adhesive is applied to the abutment surface between the contact projections, a masking covering the contact surfaces is removed, and the conductor track is glued to a PTC element with the adhesive accommodated between the surface and the abutment surface.

Heat generating element and method for manufacturing the same

A control device is disclosed for an electric heating device with a PTC element as an auxiliary heater in a motor vehicle. The control device has a control housing in which a printed circuit board, equipped with at least one power switch is provided. The power switch is applied against a cooling surface in a heat-conducting manner under pretension via an elastic pretensioning element. The pretensioning element is formed from an elongated piece of a soft-elastic plastic part extruded with at least one through-opening. Also disclosed is an electric heating device having such a control device.

Control device

An electric heating device comprised a housing having a partition wall, which separates a connection chamber from a heating chamber for dissipating heat and from which at least one PTC heating element protrudes as a heating rib in the direction toward the heating chamber. The PTC heating device comprises at least one PTC element and conductor tracks that are electrically connected in the connection chamber for energizing the PTC element with different polarities and that are connected to the PTC element in an electrically conductive manner. The heating chamber, in a top view onto the partition wall, has a substantially rectangular base area. The PTC heating devices are arranged obliquely relative to the base area for a more compact configuration of the electric heating device.

A PTC heating element has two insulating layers with a metallic coating provided on one side and a PTC element arranged therebetween. The PTC element is provided on oppositely disposed main side surfaces with a respective metallization which is electrically conductively connected to the coating of one of the insulating layers The metallization provided on one of the main side surfaces is assigned only to one potential for energizing the PTC element, and the metallization provided on the other of the main side surfaces is only assigned to the other potential for energizing the PTC element, as well as an electric heating device containing such a PTC heating element. With regard to better heat decoupling, the insulating layer may be glued to the PTC element, and the coating of the insulating layers is in direct electrically conductive contact with the metallization of the PTC element.

Growing community of inventors

Hinterweidenthal, Germany

Kai-Fabian Bürkle