STACKING-TYPE HEADER, HEAT EXCHANGER, AND AIR-CONDITIONING APPARATUS

摘要

A stacking-type header according to the present invention includes: a first plate-shaped unit; and a second plate-shaped unit (12) stacked on the first plate-shaped unit (11), and having a distribution flow passage (12A), in which the distribution flow passage includes a branching flow passage including: a first flow passage; and a second flow passage, and in which the branching flow passage is smaller in difference in flow resistance between the first flow passage and the second flow passage than a branching flow passage in a state in which a flow-passage resistance in the first flow passage and a flow-passage resistance in the second flow passage are equal to each other, and in a state in which the first flow passage and the second flow passage are point symmetric with each other about the opening port.

主权项

1. A stacking-type header, comprising:
a first plate-shaped unit having a plurality of first outlet flow passages formed therein; and a second plate-shaped unit being stacked on the first plate-shaped unit and having a first inlet flow passage formed therein and a distribution flow passage formed therein, the distribution flow passage being configured to distribute refrigerant, which passes through the first inlet flow passage to flow into the second plate-shaped unit, to the plurality of first outlet flow passages to cause the refrigerant to flow out from the second plate-shaped unit, wherein the distribution flow passage comprises a branching flow passage comprising:
an opening port configured to allow the refrigerant to flow thereinto;a first flow passage communicating between the opening port and an end portion positioned on an upper side relative to the opening port when a gravity direction is a direction to a lower side; anda second flow passage communicating between the opening port and an end portion positioned on the lower side relative to the opening port when the gravity direction is the direction to the lower side, and wherein a flow-passage resistance in the second flow passage is larger than a flow-passage resistance in the first flow passage.