| 摘要 |
The present invention provides a two-stage screw compression type freezing device. Through a first-stage screw compression part and a second-stage screw compression part which are connected in series, the two-stage screw compression type freezing device is provided with the following components: an oil supply flow path which supplies oil to a bearing at a release side of the second-stage screw compression part; and an oil discharging flow path which discharges oil from the bearing to a compression space of the first-stage screw compression part. Through the simple structure, the oil can be supplied to the release-side bearing even when the suction pressure of the first stage increases and the release pressure of the second stage reduces. |
