| 摘要 |
An object is to prevent performance deterioration by a refrigerant having a low global warming potential (GWP) and to decrease the diameter of a connection pipe. A refrigerating cycle device includes a compressor 1, a heat source-side heat exchanger 3, a first expansion device 4, a liquid-side connection pipe 7, a second expansion device 21, a user-side heat exchanger 22, and a gas-side connection pipe 8 sequentially connected. In addition, a refrigerating cycle uses a refrigerant of R32. The outer diameters of the liquid-side connection pipe and the gas-side connection pipe are set to "(D 0 -1)/8 inch" (wherein "D 0 /8 inch" is the outer diameter of a connection pipe in the use of a refrigerant of R410A). The liquid-side connection pipe has a range of the Do given "2 ‰¤ D 0 ‰¤ 4" and the gas-side connection pipe has a range of the Do given "3 ‰¤ D 0 ‰¤ 8". |
