Heat exchanger including a mixing and redistribution header

A heat exchanger, comprising:

• a mixing and redistribution header at one end of the heat exchanger;
• multiple heat exchange tubes in communication with the mixing and redistribution header;
• wherein an upper cavity and a lower cavity in communication with each other are disposed in the mixing and redistribution header;
• a fluid entering the heat exchanger first flows into a part of the lower cavity of the mixing and redistribution header, then is collected and mixed in the upper cavity of the mixing and redistribution header, and is distributed into another part of the lower cavity and flows out through a heat exchange tube of the multiple heat exchange tubes in communication with the lower cavity, a cross-sectional area of the upper cavity being equal to or greater than a cross-sectional area of the lower cavity;
• wherein the upper cavity and lower cavity are separated by a partition plate;
• wherein the upper cavity is partitioned into at least three sub-cavities by separating elements;
• wherein the at least three sub-cavities comprises a first sub-cavity, a second sub-cavity and a third sub-cavity;
• wherein the second sub-cavity is centrally located between the first sub-cavity and the third sub-cavity;
• wherein the second sub-cavity is in communication with the first sub-cavity via a first jump tube;
• and
• wherein the second sub-cavity is in communication with the third sub-cavity via a second jump tube.