Heat exchanger

Abstract

The present invention provides a A heat exchanger including a first header tank and a second header tank that are disposed to be spaced apart a predetermined distance in a height direction and a core part that is disposed between the first header tank and the second header tank and includes a plurality of tubes and fins, the first header tank including a first header plate, a first tank, and a first partition wall that divides a space formed by a combination of the first header plate and the first tank to form a plurality of flow paths, the first partition wall being provided with a main communication hole and an auxiliary communication hole, and an area ratio of the auxiliary communication hole being 3 to 7% of an area of the main communication hole.

Dependencies are inferred from the claim text.