Heat-generating element of a heating device

A heating device for heating air, said heating device comprising:

• multiple heat emitting elements;
• multiple heat-generating elements, at least some of which are flanked by a pair of heat emitting elements;
• each heat-generating element including
• at least one PTC element,
• first and second electric strip conductors that lie on opposing sides of the PTC element and through which an electric current travels perpendicularly in use,
• first and second ceramic layers, each of which abuts and covers an associated strip conductor on an exterior side thereof so as to be positioned between the associated strip conductor and an adjacent heat emitting elements, thereby electrically isolating the electric strip conductors from the heat emitting elements, wherein the first and second ceramic layers provide an abutment face against which first and second ones of the pair of heat-emitting elements abut, respectively;
• and
• at least one elongated positioning frame that forms a frame opening for holding the PTC element and several heat-emitting elements arranged in parallel layers,
• wherein said heat-emitting elements are held so that they lie on opposing sides of the PTC element, and wherein said first ceramic layer is sealed against at least long sides of the positioning frame by at least one compressible sealing bead, and wherein one of the electric strip conductors and the second ceramic layer covering said one electric strip conductor are secured within the positioning frame by injecting molding the positioning frame around the electric strip conductor, and wherein only a lateral portion of the electric strip conductor and the second ceramic layer are sealed by injection molding therearound.