Heat exchanger

A heat exchanger, comprising:

• at least two heat exchange tube groups, wherein each heat exchange tube group comprises at least two heat exchange tubes;
• and
• a connecting member, wherein the at least two heat exchange tubes in the each heat exchange tube group are communicated with each other by the connecting member, the at least two heat exchange tube groups are connected by the connecting member, and the two heat exchange tube groups are not communicated with each other;
• wherein the connecting member comprises a plate member and a plurality of communication portions, each of the plurality of communication portions has a convex hull, the plurality of communication portions correspond to a plurality of convex hulls, the plate member and the plurality of convex hulls form communication cavities, the communication cavities are separated from each other, and each communication cavity is communicated with the at least two heat exchange tubes in the each heat exchange tube group;
• wherein in a same heat exchange tube group of the at least two heat exchange tube groups, the same heat exchange tube group comprises one heat exchange tube at an inlet side and one heat exchange tube at an outlet side, a distance from an end of the heat exchange tube located at the inlet side away from the connecting member to the connecting member being different from a distance from an end of the heat exchange tube located at the outlet side away from the connecting member to the connecting member;
• the heat exchanger tube on the inlet side and the heat exchange tube on the outlet side are arranged parallel in a width direction of the heat exchanger tube;
• a flow area of the heat exchange tube located at the inlet side is different from a flow area of the heat exchange tube located at the outlet side.