Heat exchanger

摘要

A heat exchanger is provided for an exhaust system of an internal combustion engine. The exchanger has a thermoelectric generator which comprises a hot side and a cold side with a heating pipe arranged on one hot side of the thermoelectric generator, and with a cooling pipe arranged on one cold side of the thermoelectric generator. The thermoelectric generator the heating pipe, and the cooling pipe are stacked in a stack direction on top of one another and form a pipe stack, in which the respective thermoelectric generator, heating pipe and cold pipe extend parallel to one another in a longitudinal direction of the pipe stack. An increased energetic efficiency is obtained. A heat transfer structure has a heat transfer capability favoring a heat transfer between the respective pipe and the respective media conducted therein.

主权项

1. A heat exchanger, in particular for an exhaust system of an internal combustion engine, preferentially in a motor vehicle, comprising:
a thermoelectric generator having a hot side and a cold side, a heating pipe for conducting a heating medium, which is arranged on at least one hot side of such a thermoelectric generator, a cooling pipe for conducting a cooling medium, which is arranged on at least one cold side of such a thermoelectric generator, wherein the thermoelectric generator, the heating pipe and the cooling pipe are stacked on top of one another in a stack direction and form a pipe stack, in which the respective thermoelectric generator, the respective heating pipe and the respective cold pipe extend parallel to one another in a longitudinal direction of the pipe stack, wherein in at least one of the pipes a heat transfer structure is arranged, which has a heat transfer capability which favours a heat transfer between the respective pipe and the respective medium conducted therein, wherein at least one such heat transfer structure is configured so that its heat transfer capability varies in the longitudinal direction of the pipe stack, and wherein the heat transfer structure is formed as a rib structure in the form of a wavy or corrugated sheet-like wall.