| 摘要 |
The invention relates to an electrical heating device, especially for motor vehicles, comprising a closed frame ( 2 ) consisting of rails ( 3, 4 ) and cross rails ( 5, 6 ), heating elements ( 7 ) consisting of electrically conductive plastic layers ( 18 ) having PCT effect, which are arranged between contact plates ( 15, 16 ), heat-conducting secondary surface elements ( 8 ) that can be overflown by air and at least one electrically conductive spring element ( 9 ), wherein the heating elements ( 7 ) and the secondary surface elements ( 8 ) are alternatingly arranged next to one another and are braced against each other by means of the rails ( 3, 4 ) and a spring element ( 9 ) placed centrally which replaces the secondary surface element ( 8 ).
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