US 12,232,225 B2
Electric heating device
Patrick Kachelhoffer, Seebach (FR); and Daniela Weber, Winden (DE)
Assigned to Eberspächer catem GmbH & Co. KG, Herxheim (DE)
Filed by Eberspächer catem GmbH & Co. KG, Herxheim (DE)
Filed on Jun. 30, 2021, as Appl. No. 17/363,642.
Claims priority of application No. 10 2020 117 366.0 (DE), filed on Jul. 1, 2020.
Prior Publication US 2022/0007465 A1, Jan. 6, 2022
Int. Cl. H05B 3/06 (2006.01); H05B 1/02 (2006.01); H05B 3/00 (2006.01); H05B 7/20 (2006.01); H05K 7/20 (2006.01)
CPC H05B 3/06 (2013.01) [H05B 1/02 (2013.01); H05B 3/0014 (2013.01); H05K 7/2039 (2013.01); H05B 2203/016 (2013.01); H05B 2203/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electric heating device comprising:
a power section including a frame forming a heating chamber;
an electric control device comprising a control housing;
at least one PTC heating device provided in the heating chamber, the PTC heating device including at least one PTC element and conductor elements for energizing the PTC element with different polarities, wherein
the control housing forms a chamber which is separated from the frame by a partition wall, wherein a heat sink projects from the partition wall toward the power section, wherein
the electric control device has a printed circuit board and at least one power switch which generates heat and which is connected, in a heat-conducting manner, to a surface of the heat sink, and wherein
an electrically insulating layer and a spring element are provided between the power switch and the heat sink, wherein
the spring element is configured to hold the power switch and heat sink in place under a pretensioning force, wherein
the spring element being formed of a spring material with good heat-conducting properties, and wherein
the heat produced by the power switch is exclusively conducted between the power switch and the heat sink via the spring element.