| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating device free from problems, capable of maximizing a coefficient of performance at all times even when discharge pressure and suction pressure of a single-stage or multiple-stage compressing mechanism are changed. SOLUTION: This refrigerating device comprises: a refrigerating cycle constituted by successively circularly connecting the single-stage compressing mechanism 10, an oil separator 8, a condenser 3, an expansion means 4 for a cooler, and the cooler 5; an oil injection circuit successively connected between an oil outlet of the oil separator 8 and an oil inlet of the single-stage compressing mechanism 10, and composed of a first oil cooler 20 for cooling the oil separated by the oil separator 8, and an oil flow rate adjusting means 51 for adjusting a flow rate of the oil injected to the single-stage compressing mechanism 10; a discharge temperature detecting means 102 detecting a refrigerant temperature of the discharge opening of the single-stage compressing mechanism 10; and a controller 200 controlling the oil flow rate adjusting means 51 on the basis of the refrigerant temperature detected by the discharge temperature detecting means 102. COPYRIGHT: (C)2007,JPO&INPIT
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