AIR CONDITIONING APPARATUS

摘要

Heat exchanging performance of an indoor heat exchanger is improved without increasing pressure loss in a pipe of an outdoor heat exchanger. An air conditioning apparatus is composed of an indoor unit and an outdoor unit. The indoor unit is mounted with an indoor heat exchanger (10) wherein a plurality of heat transfer pipes (12A) are inserted into a plurality of fins (11). Each heat transfer pipe is provided with a spiral groove (13A) having a prescribed lead angle (Ra) on a surface inside the pipe. The outdoor unit is mounted with an outdoor heat exchanger (20) wherein a plurality of heat transfer pipes (22A) are inserted into a plurality of fins (11). Each heat transfer pipe has a lead angle (Rb) of a spiral groove (23A) smaller than the lead angle of the heat transfer pipe (10A) used for the indoor heat exchanger (10).