| 摘要 |
PROBLEM TO BE SOLVED: To keep refrigeration power even when a device is replaced by a refrigerating device for HFC refrigerant in existing indoor equipment and indoor piping designed for a HCFC refrigerant, and to prevent degradation of operation efficiency caused by increase of pressure loss by preventing increase of a flow rate of the refrigerant. SOLUTION: Indoor piping connecting a refrigerating device of a main refrigerating cycle and indoor equipment is routed through a supercooling device of a sub-refrigerating cycle, so that a condenser of the sub-refrigerating cycle can be installed outdoors as a condensing unit independently from the supercooling device. Thus the sub-refrigerating cycle can be installed without extending a piping length of the indoor piping of the main refrigerating cycle. Loss of cold and pressure loss generated during the circulation of liquid refrigerant in refrigerant piping can be reduced. COPYRIGHT: (C)2008,JPO&INPIT
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