| 摘要 |
An energy-saving refrigerating device is 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 R32 with small global warming potential (GWP). The refrigerating device includes a compressor, a first heat exchanger, an expansion device, and a second heat exchanger. The diameters of first and second communication pipes are set to {fraction (2/8 in. and 3/8 in., respectively, in the refrigerating capacity range of 2.2 to 5.6 kW. The diameters of the first and second communication pipes are set to {fraction (2/8 in. and {fraction (4/8 in., respectively, in the refrigerating capacity range of 4.5 to 7.1 kW. The diameters of the first and second communication pipes are set to {fraction (2/8 in. and 5/8 in., respectively, in the refrigerating capacity range of 7.1 to 14.0 kW.
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