Heat exchanger

A heat exchanger for heat exchange between air and heat medium, the heat exchanger comprising:

• tubes arranged in a stacking direction and being tubular members having flow paths through which the heat medium passes;
• a tank that is a container configured to supply the heat medium to each of the tubes, an end portion of the tank in the stacking direction having an opening as an inlet for the heat medium;
• and
• a prevention plate having a plate shape and arranged inside the tank, the prevention plate contacting end surfaces of the tubes within a certain region to prevent the heat medium from flowing into the tubes in the certain region, wherein
• a width direction is defined as a direction perpendicular to the stacking direction and parallel to a direction of air flowing between the tubes,
• more than one of the flow paths are formed in each of the tubes and arranged in the width direction,
• the prevention plate has a deformable portion,
• the deformable portion is elastically deformable by contacting an edge of the opening of the tank at a time of inserting the prevention plate into the tank through the opening,
• the deformable portion of the prevention plate that has been inserted into the tank is restored and receives a reaction force from an inner surface of the tank such that the prevention plate is shifted along the width direction by the reaction force,
• the prevention plate includes a rib that prevents the prevention plate from being inclined at a time of the prevention plate being shifted along the width direction inside the tank,
• the deformable portion includes:
• a first deformable portion provided on one side of the prevention plate in the width direction;
• and
• a second deformable portion provided on another side of the prevention plate in the width direction, and
• a length of the first deformable portion and a length of the second deformable portion are different from each other.