Heat exchanger

A heat exchange system comprising:

• a housing;
• a fan;
• and
• a heat exchanger comprising:
• a first heat transfer tube;
• a second heat transfer tube;
• and
• a branching tube comprising:
• a U-portion comprising:
• a bent portion bent to a predetermined radius and having a first end and a second end;
• a first linear portion extending linearly from the first end of the bent portion and having one end connected to the first heat transfer tube;
• and
• a second linear portion extending linearly from the second end of the bent portion and having one end connected to the second heat transfer tube;
• an inflow portion having a first end and a second end, wherein the first end is connected to the first linear portion of the U-portion;
• a first flow path connecting the second end of the inflow portion with the one end of the first linear portion connected to the first heat transfer tube;
• a second flow path connecting the second end of the inflow portion with the one end of the second linear portion connected to the second heat transfer tube, wherein
• the first flow path is shorter than the second flow path,
• the first flow path is formed by a part of the inflow portion and a part of the first linear portion,
• the second flow path is formed by a part of the inflow portion, a part of the bent portion, and a part of the second linear portion, and
• the fan and the heat exchanger are located relative to one another in the housing such that the first heat transfer tube is disposed windward of the second heat transfer tube.