	US 12,414,203 B2
	Heating device
Michael Huis, Freiberg Am Neckar (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/762,946
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Sep. 10, 2020, PCT No. PCT/EP2020/075348 § 371(c)(1), (2) Date Mar. 23, 2022, PCT Pub. No. WO2021/058291, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 10 2019 214 435.7 (DE), filed on Sep. 23, 2019.
Prior Publication US 2022/0394820 A1, Dec. 8, 2022
Int. Cl. H05B 1/02 (2006.01); F01N 3/20 (2006.01); H05B 3/82 (2006.01)

CPC H05B 1/0244 (2013.01) [F01N 3/2066 (2013.01); H05B 1/0213 (2013.01); H05B 1/0236 (2013.01); H05B 3/82 (2013.01); F01N 2610/02 (2013.01); F01N 2610/10 (2013.01); F01N 2610/1406 (2013.01); F01N 2610/1433 (2013.01); H05B 2203/007 (2013.01); H05B 2203/02 (2013.01); H05B 2203/021 (2013.01)]

17 Claims

1. A heating device (3), comprising at least one electrically operable heating element (6) and a heat distribution element (7) that is thermally coupled to the heating element (6), wherein the heating element (6) has a first heating sub-element (40) that has at least one positive temperature coefficient thermistor (5), wherein the first heating sub-element (40) is connected in parallel to a second heating sub-element (42, 52, 62) that is configured to reduce a dependence of a heating power of the heating device (3) on a voltage applied to the heating element (6) in a case of values of the voltage above 13 volts, wherein the heating power increases with an increase in the voltage applied to the heating element (6), wherein a rate of increase of the heating power decreases with the increase in the voltage applied to the heating element (6).