| 摘要 |
A refrigeration unit for performing a refrigerating cycle by circulating R32 as a refrigerant through a refrigerant circuit composed of a compressor (23), a condenser (22), expansion means (26), and an evaporator (2). An amount of R32 for filling the refrigerant circuit is set to be in a range of 120 g to 450 g per kW of refrigerating capacity, or an amount of R32 for filling the refrigerant circuit is set to be in a range of 400 g to 750 g per liter of unobstructed capacity of the condenser (22). By using R32 as a refrigerant that is small in Global Warming Potential (GWP), an energy-saving refrigeration against global warming with high coefficient of performance (COP) is obtained.
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