Heat exchanger and air conditioning system having same

A heat exchanger, comprising:

• a first heat exchanger core, comprising:
• first heat exchange tubes, having first ends and second ends;
• and first fins arranged alternately with the first heat exchange tubes;
• and
• a second heat exchanger core, comprising:
• second heat exchange tubes, having first ends and second ends, the first ends of the second heat exchange tubes being connected to and in fluid communication with the first ends of the first heat exchange tubes;
• and second fins arranged alternately with the second heat exchange tubes, wherein:
• the first heat exchanger core is located at one side of the second heat exchanger core in a thickness direction of the second heat exchanger core, and an orthographic projection of the first heat exchanger core on a plane parallel to the second heat exchanger core at least partially overlaps the orthographic projection of the second heat exchanger core on a plane parallel to the second heat exchanger core,
• an angle between the first heat exchanger core and the second heat exchanger core is α,
• a length of the first heat exchange tube of the first heat exchanger core is TL, a refrigerant circulation area of the first heat exchange tube is S, a width of the first fin is FW, a density of the first fin is FP, a height of the first fin is FH, and a dimension of the first heat exchanger core in the direction of alternate arrangement of the first fins and the first heat exchange tubes is ML,
• a length of the second heat exchange tube of the second heat exchanger core is tl, a refrigerant circulation area of the second heat exchange tube is s, a width of the second fin is fw, a density of the second fin is fp, a height of the second fin is fh, and a dimension of the second heat exchanger core in the direction of alternate arrangement of the second fins and the second heat exchange tubes is ml, and
• 0.016≤(TL×ML×FW×FP×FH×s×cos α)/(tl×ml×fw×fp×fh×S)≤64.