US 12,245,340 B2
Heating plate and flow heater having heating plate
Hans-Peter Etzkorn, Bruchsal (DE); and Gerd Bräuchle, Hüffenhardt (DE)
Assigned to BorgWarner Ludwigsburg GmbH, Ludwigsburg (DE)
Filed by BorgWarner Ludwigsburg GmbH, Ludwigsburg (DE)
Filed on Oct. 5, 2020, as Appl. No. 17/063,197.
Claims priority of application No. 10 2019 127 324.2 (DE), filed on Oct. 10, 2019.
Prior Publication US 2021/0108830 A1, Apr. 15, 2021
Int. Cl. H05B 3/26 (2006.01); F24H 1/00 (2022.01); F24H 9/1818 (2022.01)
CPC H05B 3/262 (2013.01) [F24H 9/1818 (2013.01); F24H 1/009 (2013.01); H05B 2203/003 (2013.01); H05B 2203/021 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A flow heater, comprising:
a housing having inlet and outlet openings for liquid to be heated;
a heating plate comprising:
a substrate made of metal;
a heating layer;
an insulation layer arranged between the heating layer and the substrate;
the insulation layer bearing an electrically conductive shielding layer, wherein the shielding layer is a closed layer and is disposed between the heating layer and the substrate; and
a second insulation layer on which the heating layer lies, the second insulation layer covering the shielding layer;
wherein, in the flow heater, the shielding layer is galvanically separated from the substrate and current flow from the shielding layer to the substrate is thereby prevented.