| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating cycle of high reliability wherein a refrigerator oil is prevented from stagnating inside the cycle even when the refrigerator oil is weakly soluble in a refrigerant and thus exhaustion of the oil of a compressor is prevented, and wherein a large amount of liquid back to the compressor is avoided even when an accumulator is dispensed with, in regard to the refrigerating cycle wherein a surplus refrigerant is brought about. SOLUTION: A receiver and first and second restrictors disposed before and behind the receiver are provided as equipment for controlling the saturation oil solubility in a liquid refrigerant in the refrigerating cycle, so that the surplus liquid refrigerant brought about in circulation of the refrigerant be collected in the receiver with a high temperature, thereby preventing separation of the refrigerator oil of weak solubility.
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