| 摘要 |
An energy-saving type refrigerating device capable of preventing global warming, allowing a communication pipe diameter to be reduced and the number of types of the communication pipe diameters to be reduced while a COP of over the COP obtained when R22 is used is provided by using, as a refrigerant, R32 with small global warming potential (GWP), comprising a compressor (23), a first heat exchanger (22), a expansion means (26), and a second heat exchanger (2), wherein R32 is used as a refrigerant, the diameter of a first communication pipe (42) is set to 2/8 in. and that of a second communication pipe (41) is set to ⅜ in. in the refrigerating capacity range of 2.2 to 5.6 kW, the diameter of the first communication pipe (42) is set to 2/8 in. and that of the second communication pipe (41) is set to 4/8 in. in the refrigerating capacity range of 4.5 to 7.1 kW, and the diameter of the first communication pipe (42) is set to 2/8 in. and that of the second communication pipe (41) is set to ⅝ in. in the refrigerating capacity range of 7.1 to 14.0 kW.
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