Patent ID: 9651314
Date: 2017-05-16
CPC Classifications: B21D,F24F,F25B,F28F

Claim:
1. An air conditioner comprising: an indoor machine equipped with an indoor heat exchanger constituted by a plurality of heat transfer tubes which have spiral grooves formed on faces inside the plurality of heat transfer tubes and which pierce a plurality of fins, and an outdoor machine equipped with an outdoor heat exchanger constituted by a plurality of heat transfer tubes which have spiral grooves formed on faces inside the plurality of heat transfer tubes which pierce a plurality of fins, wherein a number of threads of the spiral grooves formed in the plurality of heat transfer tubes of the outdoor heat exchanger functioning as an evaporator, per unit length is larger than a number of threads of the spiral grooves formed in the plurality of heat transfer tubes of the indoor heat exchanger functioning as a condenser, per unit length, wherein the number of threads of the spiral grooves formed in the plurality of heat transfer tubes of the indoor heat exchanger is 40 to 60, and wherein the number of threads of the spiral grooves formed in the plurality of heat transfer tubes of the outdoor heat exchanger is 60 to 80.