Heat exchanger

A heat exchanger, comprising:

• a first header and a second header;
• a plurality of flat pipes, each of the plurality of flat pipes defining a first end connected with the first header and a second end connected with the second header, and the plurality of flat pipes being arranged and spaced apart from each other in axial directions of the first header and the second header;
• a plurality of fins, each of the plurality of fins being disposed between adjacent flat pipes, the plurality of fins comprising a first fin, a second fin and a third fin,
• wherein the heat exchanger has a bent segment and a straight segment adjacent to the bent segment, both the first header and the second header bent in the bent segment, both the first header and the second header extend in a straight manner in the straight segment, the first fin is in the straight segment, the second fin and the third fin are in the bent segment, and a centerline of the second fin extending in a thickness direction of the plurality of flat pipes and a centerline of the third fin extending in the thickness direction of the flat pipe extend along different lines in a plane orthogonal to a length direction of the plurality of flat pipes, the second fin and the third fin have different widths, both of the widths are less than the width of the first fin, the width of the fins extends in a direction parallel to a thickness direction of the heat exchanger.