HEAT EXCHANGER

摘要

A heat exchanger, wherein a tank (7) is formed so that access port side parts (18) and (19) defined by a partition wall (17) extending in a laminated direction are opened on a side along a ventilating direction, and a slit hole (22) passing through a closing member (20) in the axial direction of the openings in the tank (7) is provided in the closing member (20) at a portion between projected parts (21) and (21) when the openings of the tank (7) are closed by the closing member (20), whereby, when the tank having a plurality of compartments therein disposed in parallel with each other in ventilating direction and having the openings provided along the ventilating direction is used, such a bypass leakage that heat exchanging medium bypasses from one compartment to the other one without passing through the heat exchanging medium path of tube can be detected.