| 摘要 |
The present invention relates to a heat generating element (300), in particular for an electrical heating device of a motor vehicle, having at least one PTC element (306) and two contact plates (308) which are in contact with opposite sides of the PTC element (306) and are provided on their outer side facing away from the PTC element (306) with an insulating layer (316), having shielding comprising a first shell-like shielding plate (318) and a second shell-like shielding plate (320) which are each provided on the outer side of the insulating layer (316) and are connected thereto in a thermally conductive manner, wherein the longitudinal wall sections, directed towards one another, of the first and second shielding plate (318; 320) form an overlapping region (332). In order to reduce EMC problems, the present invention proposes sealing the two shielding plates (318, 320) by way of an adhesive (330) which is received in one of the two shielding plates (318) and into which the end of a rim of the other shielding plate (320) dips. In the method according to the invention, first of all a first insulating layer (316), a contact plate (308) having a PTC element (306) internally in contact therewith and preferably a positioning frame (302) surrounding the PTC element (306) are introduced into the shell-like first shielding plate (318) and a further contact plate (308) is applied on the other side to the PTC element (306). Then, a liquid adhesive (330) is poured in between a rim of the first shielding plate (318) and the positioning frame (302), said adhesive (330), when the second shielding plate (320) is applied to the further contact plate (308), with interposition of a second insulating layer (316), sealing the rim of the second shielding plate (320). |
