Eltek S.p.a.

Luca Vercellotti

Alberto Barbano

Luca Costa

Mauro Zorzetto

Marco Pizzi

Marco Bizzarro

Costanzo Gadini

A semifinished product of an electric heater device () has a structure that extends in a length direction (L) and that comprises: —two connection bodies (), which substantially extend alongside one another or parallel to one another in the length direction (L) and are at least in part flexible or deformable in the length direction (L); and —a plurality of heating bodies (), each heating body () including a material having a PTC effect. The heating bodies () are set at a distance from one another in the length direction (L) and generally extend in a direction transverse to the length direction (L). The material having a PTC effect is a polymer-based material that is in electrical contact with the at least two connection bodies (). Each of the at least two connection bodies () comprises electrical- and mechanical-connection parts (), which have a mesh structure that is at least partially embedded or englobed in the polymer-based material.

Semi-finished product of an electric heater device

An electrical heater device comprises an heating element, which includes two electrodes and a heating body made of a polymer-based material having a PTC effect, in contact with the electrodes. Each electrode comprises a meshed structure, which extends in a length direction and in a width direction, and is embedded at least partially in the heating body. Each electrode further comprises an electrical-distribution element which is fixed to the meshed structure and includes a distribution portion that extends in the length direction, or in the width direction, or in both the length and width directions of the meshed structure.

Electrical heater device, in particular having a PTC effect

An electrical heating device comprises: a first electrode layer (), made of electrically conductive material; a second electrode layer (), made of electrically conductive material; and a heating layer, made of a material having a PTC effect, wherein the first electrode layer () and the second electrode layer () face one another, with at least one part of the heating layer that is set between the first electrode layer () and the second electrode layer (), in contact with them. At least one region () of the at least one from among the first electrode layer (), the second electrode layer (), and said at least one part of the heating layer has a plurality of electrically non-conductive sites (), which are prearranged for bringing about: &#x2014;an emission of heat by the heating device () in said at least one region () that is different from the emission of heat by the heating device () in at least one other region () of the at least one from among the first electrode layer (), the second electrode layer (), and said at least one part (') of the heating layer (); and/or &#x2014;an emission of heat by the heating device () at the first electrode layer () that is different from the emission of heat by the heating device () at the second electrode layer ().

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Casale Monferrato, Italy

Luca Vercellotti