| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil injection type screw compressor capable of appropriately holding a delivery temperature of a delivery gas. SOLUTION: This oil-cooled type screw compressor 1 comprises: a compressor body; and oil separation recover equipment 14 arranged to a delivery flow passage 13 extending from a delivery opening of the compressor body 12. In this compressor 1, an oil supply passage 18 makes this oil separation recovery equipment 14 and the compressor body 12 communicate with each other. The oil supply passage 18 branches off from the middle thereof into a first supply flow passage part 19 and a second supply flow passage part 20, an open/close valve 22 is provided to the first supply flow passage part 19, and a pressure gage 21 is arranged to the delivery flow passage 13. A control device 23 is provided which controls the open/close valve 22 so as to be opened or closed based on a correlation between a delivery pressure detected by the pressure gage 21 and a predetermined pressure. COPYRIGHT: (C)2004,JPO
|
