Heat exchanger

A heat exchanger comprising:

• a first heat transfer tube;
• a second heat transfer tube;
• and
• a branching tube:
• having:
• a first end connected to an end of the first heat transfer tube,
• a second end connected to an end of the second heat transfer tube, and
• a third end, and
• connecting the first end, the second end, and the third end to each other,
• wherein
• the first heat transfer tube is larger in heat exchange quantity than the second heat transfer tube,
• the branching tube
• has:
• a first flow path connecting the first end with the third end, and
• a second flow path connecting the second end with the third end,
• wherein the first flow path is shorter than the second flow path, and
• comprises:
• a U portion;
• and
• an inflow portion having an end connected to the U portion,
• the U portion comprises:
• a bent portion bent to a predetermined radius;
• a first linear portion extending linearly from an end of the bent portion, and
• a second linear portion extending linearly from the other end of the bent portion,
• the first linear portion has an end that is far from the bent portion and that corresponds to the first end,
• the second linear portion has an end that is far from the bent portion and that corresponds to the second end,
• the inflow portion has:
• an end connected to the first linear portion, and
• the other end corresponding to the third end,
• the first flow path comprises:
• the inflow portion;
• and
• part of the first linear portion, and
• the second flow path comprises:
• the inflow portion;
• part of the bent portion;
• and
• the second linear portion.