| 摘要 |
A refrigerating circuit (10), comprising a compressor (11), a four-way switching valve (12), an outdoor heat exchanger (13), an expansion valve (14), and an indoor heat exchanger (15) connected in order to each other, wherein an R32 is filled therein, and heat transfer tubes of the indoor heat exchanger (15) are formed of heat transfer tubes having an inner diameter of 4.7 to 5.9 mm, and the heat transfer tubes of the outdoor heat exchanger (13) are formed of heat transfer tubes having an inner diameter of 5.4 to 6.7 mm. |
