Abstract: A heat exchanger includes a core and a header tank. The header tank includes a partition, a first inlet pipe, and a second inlet pipe. The partition divides an inside passage of the header tank into a first tank and a second tank. The first inlet pipe introduces a first fluid into the first tank. The second inlet pipe introduces a second fluid into the second tank. The first inlet pipe is inclined at a predetermined angle except a right angle relative to an outer surface of the header tank such that a flow direction of the first fluid flowing from the first inlet pipe to the first tank includes a component in a predetermined direction from a first end of the first tank provided with the partition to a second end of the first tank opposite to the first end.

Abstract: A heat exchanger is arranged at one side in a predetermined direction with respect to a wall body having a ventilation opening. A core portion includes a plurality of tubes in which a heat medium flows to exchange heat with air having passed through the ventilation opening. A first header tank is connected to one ends of the plurality of tubes, and is provided with an inflow port from which the heat medium flows into the first header tank. The other ends of the plurality of tubes are connected to a second header tank, and the heat medium flowing through the tubes collects into the second header tank. The core portion has an opening overlapping range that overlaps with the ventilation opening at the one side in the predetermined direction, and a large amount of the heat medium flows unevenly into the opening overlapping range of the entire core portion.

Abstract: A heat exchanger includes a core and a header tank. The header tank includes a partition, a first inlet pipe, and a second inlet pipe. The partition divides an inside passage of the header tank into a first tank and a second tank. The first inlet pipe introduces a first fluid into the first tank. The second inlet pipe introduces a second fluid into the second tank. The first inlet pipe is inclined at a predetermined angle except a right angle relative to an outer surface of the header tank such that a flow direction of the first fluid flowing from the first inlet pipe to the first tank includes a component in a predetermined direction from a first end of the first tank provided with the partition to a second end of the first tank opposite to the first end.