| 摘要 |
IN A REFRIGERATING CYCLE USING A REFRIGERANT CONTAINING HYDROFLUOROCARBON AS A MAIN COMPONENT, OF A REFRIGERANT PIPE ARRANGEMENT CONSTITUTING THE REFRIGERATING CYCLE, A REFRIGERANT PIPE EXTENDING UPWARD FROM A LOWER SIDE TO AN UPPER SIDE IS MADE TO AN INNER DIAMETER NOT LARGER THAN A VALUE WHICH MAKES THE FLOW RATE OF THE REFRIGERANT BE NOT SMALLER THAN A ZERO PENETRATION FLOW RATE. IT IS POSSIBLE TO OBTAIN A REFRIGERATING CYCLE SUPERIOR IN OIL RETURNING TO A COMPRESSOR (1) AND HENCE HIGH IN REALIBILITY, EVEN IN THE CASE OF USING REFRIGERATOR OIL (6) HAVING NO COMPABILITY WITH A REFRIGERANT CONTAINING HYDROFLUOROCARBON AS A MAIN COMPONENT.FIG. 1
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