The invention relates to a vehicle heater, comprising at least one pipe, which has a plurality of chambers, ceramic heating elements, which are arranged in the chambers, and contact plates, which rest against the heating elements in the chambers via a front side and face an upper side or underside of the chamber via a rear side, wherein at least two chambers of the pipe are separated by an intermediate wall, which runs from the upper side to the underside of these two chambers. The contact plates have a slit, in which the intermediate wall is arranged.

A blow-by heater includes a metal pipe for flowing a blow-by gas therethrough. The metal pipe includes a flat portion on one side along an axis direction and a curved portion on a side opposite to the flat portion and is formed of a metal plate with a joining portion abutting against each other at edges of the metal plate at the curved portion. The blow-by gas heater further includes a resin molded over the metal pipe, and a heating source provided inside resin and directly contacting the flat portion.

The present invention relates to a heat exchanger (20) comprising a protective device (1), mutually parallel tubes (22) through which a first fluid circulates, and perpendicular fins (26) connecting two successive flat tubes (22), a second fluid circulating between said flat tubes (22) by passing through said fins (26), said protective device (1) being apertured so as to allow the circulation of the second fluid through the fins (26), said protective device (1) comprising fixing spikes (7) which are inserted forcibly between the fins (26).

A system comprising a plurality of housings; a plurality of thermal heat generators: the plurality of thermal heat generators encased in the plurality of housings and adapted and configured on a plurality of oscillating fans; the plurality oscillating fans encased in the plurality of housings and adapted and configured to generate hot air. The system comprises a plurality of air jets; the plurality of air jets encased in the plurality of housings; and wherein thermal hot air produced by the plurality of oscillating fans is further propelled by the plurality of air jets; and wherein the plurality of housings comprised of a plurality of air vents and positioned on the undercarriage of a motorized vehicle; and wherein thermal hot air is forced out of the plurality of air vents onto snow or ice located under a motorized vehicle.

The invention relates to an electronic interface housing (6) of an electrical heating device (1) for heating an airflow passing through, the electronic interface housing (6) being configured to house electronic components for controlling at least one heating element (4) fitted to the electrical heating device (1), including at least one printed circuit board (44), the electronic interface housing (6) comprising at least one rib (56, 58) in contact with the printed circuit board (44) in a contact zone (54), characterized in that the printed circuit board (44) comprises at least one water drainage opening (82) in the contact zone (54).

A process for manufacturing a PTC heating element that includes at least one PTC component (20) and a carrier (14, 16) permanently connected to the PTC component on at least one side (24, 26) of thereof The process includes applying electrically conductive sintered material (28, 30, 36, 38) on the one side of the PTC component, which side is to be permanently connected to a carrier. Subsequently, a contact of the PTC component is established with at least one carrier such that sintered material, which was applied between the PTC component and the carrier and is intended for establishing a connection between the at least one PTC component and the at least one carrier, is positioned. The sintered material, which material has been positioned between the PTC component and the carrier, is sintered by heating or/and by applying pressure.