Patent ID: 9574481
Date: 2017-02-21
CPC Classifications: F01N,F28D,H01L,Y02T

Claim:
1. A heat exchanger, in particular for an exhaust system of an internal combustion engine, the heat exchanger comprising: a thermoelectric generator comprising multiple-thermoelectric elements, each of which have a hot side and a cold side; a heating channel for conducting a heating medium, the heating channel being arranged on the hot sides of the thermoelectric elements of the thermoelectric generator; a cooling channel for conducting a cooling medium, the cooling channel being arranged on the cold sides of the thermoelectric elements of the thermoelectric generator, wherein the thermoelectric generator, the heating channel and the cooling channel are arranged adjacent to each other in a stacking direction and form a channel stack, in the channel stack, with respect to the stacking, the first channel and the last channel are heating channels or cooling channels; a housing covering an interior space, the interior space receiving the channel stack, the housing comprising a cooling medium inlet, a cooling medium outlet, a heating medium inlet and a heating medium outlet and electrical connections for the thermoelectric generator, the housing having sidewalls on diametrically opposite sides of the interior space; a double-walled intermediate bottom in the interior space of the housing, the thermoelectric elements of the thermoelectric generator being arranged in the double-walled intermediate bottom which fluidically separates the cooling channel from the heating channel which is adjacent thereto, the double-walled intermediate bottom having one end mounted on one of the sidewalls, the double-walled intermediate bottom having another end mounted on the other one of the sidewalls, the double-walled intermediate bottom extending from the one sidewall to the other side wall, the thermoelectric elements of the thermoelectric generator in the intermediate bottom being individually unencapsulated and are encapsulated as a group through the intermediate bottom; in the channel stack in the stacking direction there is a first and a last intermediate bottom in the housing that is enclosed transversely to the stacking direction and is closed in a circumferential direction by connecting channels, which fluidically connect the first channel and the last channel as well as each further channel of the same type that may be present with one another.