| 摘要 |
PURPOSE:To achieve good lubrication performance continuously, by returning the high pressure oil separated by an oil separator to an oil sump during reverse rotation then supplying from the oil sump to the low pressure lubricating section thereby achieving the good lubricating performance even during reverse rotation. CONSTITUTION:The refrigerant gas compressed through reverse rotation of a rotor 11 in a compression chamber 9 is discharged through a discharge port 20 to a path 15 then led out through a refrigerant tube 17 to the outside of a dome 1. Here the oil mixed with the gas is discharged together with the discharge gas then separated by an oil separator 26 and the gas is discharged as it is, while the oil will remain in the oil separator 26. The high pressure oil remained in the oil separator 26 will flow through an oil return tube 27, check valve 28 and a conducting port 25 into an oil sump 22 then supplied to each lubricating section thereafter it is discharged together with the copressed gas and supplied through said path to the lubricating section resulting in the good lubrication during reverse rotation. |
