Patent ID: 11959663
Assignee: ELTEK S.P.A.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC B  F  H | IPC F  H

Claim 0:
1. An electrical heater device comprising at least one heating element which includes a first electrode, a second electrode and a heating body that includes a material having a PTC effect in electrical contact with the first electrode and the second electrode, wherein the material having a PTC effect comprises at least a polymer or a polymer-based material,
wherein each of the first electrode and the second electrode comprises:
a meshed structure including a plurality of substantially threadlike metal elements which define a plurality of mesh openings, with the meshed structure which has a length and a width, is in electrical contact with the heating body and is at least partially embedded or englobed therein, and
at least one electrical-distribution element for distributing electric current on the plurality of threadlike metal elements, the at least one electrical-distribution element including a shaped metal strap which is fixed to the meshed structure, the shaped metal strap defining at least one distribution portion that overlaps a corresponding region of the meshed structure and extends in at least one of a length direction and a width direction of the meshed structure,
wherein the at least one distribution portion defined by the shaped metal strap is welded to respective threadlike metal elements of the plurality of threadlike metal elements at said corresponding region,

wherein the heating body is a body moulded at least in part over the first electrode and the second electrode, such that part of said polymer or polymer-based material occupies at least a part of said mesh openings, and
wherein between the first electrode and the second electrode a spacer body is arranged, which is also at least partially embedded or englobed in the material having a PTC effect of the heating body which is moulded over the first electrode and the second electrode.