Heat exchanger

A heat exchanger adapted to be used in a vapor compression system, comprising:

• a shell with a longitudinal center axis extending generally parallel to a horizontal plane;
• a refrigerant distribution assembly including
• a first tray part disposed inside of the shell and continuously extending generally parallel to the longitudinal center axis of the shell to receive a refrigerant that enters the shell, the first tray part having a plurality of first discharge apertures;
• a plurality of second tray parts disposed inside of the shell below the first tray part to receive the refrigerant discharged from the first discharge apertures such that the refrigerant accumulated in the second tray parts does not communicate between the second tray parts, the second tray parts being aligned along a direction generally parallel to the longitudinal center axis of the shell, each of the second tray parts having a plurality of second discharge apertures;
• and
• a heat transferring unit disposed inside of the shell below the second tray parts so that the refrigerant discharged from the second discharge apertures of the second tray parts is supplied to the heat transferring unit.