LAMINATED HEADER, HEAT EXCHANGER, AND AIR CONDITIONER

摘要

A stacking-type header (2) according to the present invention includes: a first plate-shaped unit (11) having a plurality of first outlet flow passages (11 A) formed therein; and a second plate-shaped unit (12) stacked on the first plate-shaped unit (11), the second plate-shaped unit (12) having a distribution flow passage (12A) formed therein, the distribution flow passage (12A) being configured to distribute refrigerant, which passes through a first inlet flow passage (12a) to flow into the second plate-shaped unit (12), to the plurality of first outlet flow passages (11 A) to cause the refrigerant to flow out from the second plate-shaped unit (12), in which the distribution flow passage (12A) includes a branching flow passage (12b) including a straight-line part perpendicular to a gravity direction, and in which the refrigerant flows into the branching flow passage (12b) through a part between both ends of the straight-line part, passes through both the ends, and flows out from the branching flow passage (12b) through a plurality of end portions.