Heat exchanger

摘要

The present invention relates to a heat exchanger in which a plate-shaped refrigerant flow portion which provides an internal refrigerant flow path by overlaying two flat plates formed by drawing and a cooling fin are alternately layered; and comprising an opening portion provided on each of the flat plates and which is connected with the refrigerant flow path; and a continuous space for the flow of the refrigerant which is provided by connecting the opening portions of adjacent refrigerant flow portions. The refrigerant which flows in the space is distributed to the respective refrigerant flow paths through the opening portions. The heat exchanger further comprises a means for improving the heat exchange capacity, and this means is, for example, a narrowing means which is provided at the upstream end part of the space in order to uniformly distribute the refrigerant to the refrigerant flow paths.