The utility model relates to
air conditioning technical field especially relates to a
heat exchanger, include: first collecting flow
pipe, include: a plurality of first
branch line, second collecting flow
pipe, include: a plurality of second
branch line, heat exchange pipeline, heat exchange pipeline is suitable for switching between evaporative mode and condensing mode, in evaporative mode, the
coolant flows out heat exchange pipeline through the first number of first
branch line, the
coolant flows into heat exchange pipeline through the second number of second
branch line, in condensing mode, the
coolant flows out heat exchange pipeline through the third number of first
branch line, the coolant flows into heat exchange pipeline through the fourth number of second
branch line, the first number is greater than the third number, and the second number is greater than the fourth number. The utility model discloses
heat exchanger shunt adopts the shunt mode of variable, and the flow path of coolant in
heat exchanger is redistributed when
refrigeration and heating, and the flow path of coolant is less when
refrigeration mode, and the flow path of coolant is more when heating mode, and the
heating efficiency of air conditioner is improved significantly.