HEAT EXCHANGER FOR GASES, IN PARTICULAR FOR THE EXHAUST GASES OF AN ENGINE

摘要

The invention relates to a heat exchanger comprising a node arranged inside a frame (2), said node comprising an array of tubes for gas circulation with heat exchange with a coolant. Said heat exchanger is characterized in that said frame (2) comprises two coolant inlet ducts (4) and outlet (5) ducts arranged in the vicinity of each other on the same side of the frame, and in that it comprises bypass means (6, 7a-7d) arranged inside the frame (2) capable of directing the coolant flow in a direction opposite to that of the gas flow in a portion at least of said frame (2). It can be used for enhancing the coolant distribution in order to obtain an optimal yield.