Exhaust gas heat exchanger and sealing device for exhaust gas heat exchanger

摘要

The present invention relates to exhaust gas heat exchangers as well known in the art and to a sealing device which is particularly suitable for use in exhaust gas heat exchangers. DOLLAR A The exhaust gas heat exchanger has for the exhaust gas flow connection points for connecting the exhaust gas heat exchanger both to a Abgaszuführleitung for supplying a hot exhaust stream and a Abgasabführleitung for discharging the cooled in the exhaust gas heat exchanger exhaust stream. In this case, the exhaust gas flow flows through the exhaust gas heat exchanger in a bundle of Abgasleitrohren in a flow direction. Furthermore, a coolant flows through the exhaust gas heat exchanger in a coolant flow. For this purpose, at least one coolant supply connection and at least one coolant discharge connection are provided. In the exhaust gas heat exchanger, the coolant is guided in a coolant channel, within which it flows around the bundle of exhaust gas pipes. According to the invention, the coolant channel has at least two regions which differ with respect to the direction of flow of the exhaust gas flow through deviating flow directions of the coolant.