HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE

摘要

A heat exchanger has a structure consisting of a layer formed in a heat transfer block (2) and comprising, as a set: first fluid flow passages (3) arranged side by side on the same plane so as to be parallel to each other; and second fluid flow passages (4) arranged on a plane parallel to the plane on which the first fluid flow passages (3) are arranged. The heat exchanger is configured in such a manner that a pair of connection holes (5), which extend in the direction perpendicular to the direction of the second fluid flow passages (4), are formed at opposite ends of each of the second fluid flow passages (4) in such a manner that all the second fluid flow passages (4) are connected to each other. The heat exchanger is provided with an inlet conduction pipe (6a) connected coaxially to one connection hole (5) at a side surface of the heat transfer block (2). The heat exchanger has a second flow distribution mechanism (712) for spirally partitioning the inside of the one connection hole (5), and also has a first fluid distribution mechanism (711) for spirally partitioning the inside of the inlet conduction pipe (6a) and continuing to the second fluid distribution mechanism (712) at the end of the inlet conduction pipe (6a) which faces the one connection hole (5). The end of the first fluid distribution mechanism (711), which is located on the side opposite the one connection hole (5), divides the inlet conduction pipe (6a) in the direction parallel to the direction of gravity.