Stacked plate heat exchanger

A stacked-plate heat exchanger comprising:

• a high-temperature (HT) coolant circuit through which a high-temperature coolant flows and a low-temperature (NT) coolant circuit through which a low-temperature coolant flows;
• heat exchanger plates stacked upon one another and through which the two coolants and a medium to be cooled flow, the two coolants having a different temperature level from each other in the high-temperature coolant circuit and in the low temperature coolant circuit;
• an obstruction configured to force a deflection of the low-temperature coolant in the low-temperature coolant circuit;
• wherein the heat exchanger plates include a partition wall separating the high-temperature coolant circuit from the low-temperature coolant circuit;
• wherein the high-temperature coolant circuit includes a central HT coolant inlet adjacent to the partition wall, and the low-temperature coolant circuit includes a central NT coolant outlet adjacent to the partition wall;
• wherein the HT coolant inlet and the NT coolant outlet together form a teardrop shape, which is divided by the partition wall;
• wherein the HT coolant inlet has a rounded shape and the NT coolant outlet has a triangular shape, the HT coolant inlet and the NT coolant outlet each have one side formed by the partition wall;
• wherein two sides of the NT coolant outlet lying adjacent to the partition wall are disposed at an acute angle to the one side formed by the partition wall, and, at longitudinal ends of the two sides remote from the partition wall, merge into one another via a portion;
• and
• wherein the obstruction is disposed in a region adjacent to the rounded portion.