| 摘要 |
In a refrigerating device comprising: a compressor that is driven by a motor; a refrigerant circulation flow passage that includes an oil separator/collector, a condenser, an expansion valve, and an evaporator; and an oil flow passage that conducts oil in the oil separator/collector to a bearing of the compressor, an oil supply opening is provided for a motor casing that stores the motor, an oil supply line for supplying oil from an oil sump of the refrigerant circulation flow passage on the discharge side of the compressor to the oil supply opening is provided, oil is supplied to the oil supply opening through the oil supply line, and oil is distributed across surfaces of windings of the motor. And an internal pressure of the motor casing is lower than a pressure in the oil sump in the refrigerant circulation flow passage on the discharge side of the compressor, consequently oil is easily distributed across the entire motor casing. In such a refrigerating device, an insulation capability of the motor does not decrease with the elapse of long time.
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