Heat exchanger

A head exchanger in which a plurality of refrigerant flow portions and cooling fins are alternatively layered, and each refrigerant flow portion is a plate-shaped and provides an internal refrigerant flow path by overlaying two flat plates formed by drawing, comprising:

• an opening portion provided on each of said flat plates and which is connected with said refrigerant flow path;
• a continuous space for the flow of said refrigerant which is provided by connecting the opening portions of adjacent refrigerant flow portions;
• and
• a side plate which covers one end of said layered refrigerant flow portions and cooling fins;
• wherein said refrigerant which flows in said space is distributed to said refrigerant flow paths through said opening portions;
• and
• a means for improving the heat exchange capacity of said heat exchanger is provided, and this means is a narrowing means which is formed by extending a lower end of said side plate and has a plurality of pores in order to pass through said refrigerant is provided at an upstream end part of said space in order to uniformly distribute said refrigerant to the respective refrigerant flow paths,
• wherein a rectifier which is formed by extending a lower end of said narrowing means and rectifies the flow of said refrigerant along the longitudinal direction of said space is provided at a downstream end side of said space.