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) mounted 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: an opening port; a first straight-line part parallel to a gravity direction, the first straight-line part having a lower end communicating with the opening port through a first connecting part; and a second straight-line part parallel to the gravity direction, the second straight-line part having an upper end communicating with the opening port through a second connecting part, in which at least a part of the first connecting part and at least a part of the second connecting are not being parallel to the gravity direction, and in which the refrigerant flows into the branching flow passage (12b) through the opening port, passes through each of the first connecting part and the second connecting part to flow into each of the lower end of the first straight-line part and the upper end of the second straight-line part, and flows out from the branching flow passage (12b) through each of an upper end of the first straight-line part and a lower end of the second straight-line part.