| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration cycle device having an internal heat exchanger with superior heat exchanging performance by making a high pressure-side pipe and a high pressure-side refrigerant of the internal heat exchanger larger in heat transfer area.SOLUTION: A refrigeration cycle device includes a compressor, a heat radiator, pressure reduction means, an evaporator, and an internal heat exchanger where a high pressure-side refrigerant supplied from the heat radiator to the pressure reduction means and a low pressure-side refrigerant reduced in pressure by the pressure reduction means exchange heat, and a high pressure-side pipe 131 where the high pressure-side refrigerant flows at the internal heat exchanger has an uneven part 134 on its inner surface. Heat transfer area between the high pressure-side pipe 131 and the high pressure-side refrigerant flowing in the high pressure-side pipe 131 increases and a turbulent flow acceleration effect is generated by the uneven part 134, and the heat transfer rate between the high pressure-side pipe 131 and the high pressure-side refrigerant flowing in the high pressure-side pipe 131 is improved so as to increase a heat exchange amount between the high pressure-side refrigerant and low pressure-side refrigerant. |
