Heat exchanger and manufacturing method of home appliance including the heat exchanger

A clothes dryer comprising:

• a cabinet;
• a drum disposed in the cabinet and configured to receive clothes therein;
• and
• a heat exchanger configured to (i) remove moisture from the clothes in the drum or (ii) increase a temperature of air in the drum,
• wherein the heat exchanger comprises:
• a copper pipe defining a refrigerant circulation passage,
• a plurality of fins arranged in parallel and spaced apart from each other, the plurality of fins being coupled to an outer circumferential surface of the copper pipe,
• a plurality of end plates that are spaced apart from each other, the plurality of fins being disposed between the plurality of end plates, and
• a connection pipe that defines weld zones at both ends, that is connected to at least one of an inlet end or an outlet end of the copper pipe, and that has a length in a range from 40 mm to 80 mm,
• wherein the copper pipe comprises:
• a plurality of straight tubes that each extends along a direction of the plurality of fins, and
• a plurality of return bends connected to the plurality of straight tubes, each of the plurality of the return bends being welded to two of the plurality of straight tubes, and each end of the plurality of return bends being connected to one end of the plurality of straight tubes, respectively, and
• wherein a coating layer is applied to (i) a surface of each of the plurality of end plates, (ii) each of the plurality of return bends located at the surface of each of the plurality of end plates, and (iii) a surface of the connection pipe.