HEAT EXCHANGER FOR AIR CONDITIONER

摘要

PROBLEM TO BE SOLVED: To provide a heat exchanger for an air conditioner capable of increasing the degree of supercooling of the refrigerant of a condenser without using a means for increasing the amount of charged refrigerant. SOLUTION: A heat exchanger is provided with an inner insert body 8 in a heat transfer pipe 7 in the outlet side of refrigerant as a condenser. The inner insert body 8 has a cylindrical inner insert main body 80 disposed coaxially with the heat transfer pipe 7 and a plurality of protruding parts 82. These protruding parts 82 extend axially with respect to the inner insert main body 80 and protruding radially to abut on the inner wall surface of the heat transfer pipe 7. A passage is narrowed toward the inner wall surface side of the heat transfer pipe 7 due to the inner insert main body 80 to increase the flow velocity of refrigerant and flow the refrigerant only in the inner wall surface side of the heat transfer pipe 7. Further, a heat transfer is achieved between the inner wall surface of the heat transfer pipe 7 and the refrigerant through the inner insert body 8. Accordingly, the heat transfer performance of the heat transfer pipe 7 in the outlet side in which the inner insert body 8 is provided is improved more than those of other parts of the heat transfer pipe 7.