| 摘要 |
The present invention provides a heat exchanger suitable for a refrigerant circuit in which a single refrigerant or a mixed refrigerant containing the single refrigerant is used, the single refrigerant composed of a refrigerant whose molecular formula is expressed as C 3 H m F n (wherein m = 1 to 5, n = 1 to 5, and m + n = 6) and whose molecular structure has one double bond. In a heat exchanger (10), the relationship between the center-to-center distance S between heat transfer tubes that are adjacent in the vertical direction and an outside diameter D of the heat transfer tubes is 2.5 < S/D < 3.5, the relationship between the length L of a refrigerant passage and the outside diameter D of the heat transfer tubes is 0.28 × D 1.17 < L < 1.10 × D 1.17 , and an outdoor heat exchanger (4) and an indoor heat exchanger (6) are designed based on the above relational expressions. |
