| 摘要 |
PURPOSE:To reduce the wear of a slide part and the heat generation caused by sliding in a shaft seal device by successively lubricating the shaft seal device and a bearing part with one part of sucked refrigerant gas containing low temperature lubricating oil returned from an evaporator. CONSTITUTION:Sucked refrigerant gas 42 containing low temperature lubricating oil returned from an evaporator flows via an intake connection inlet 32 and a sucked refrigerant gas passage 24 into a cylinder 35. At that time, one part of the sucked refrigerant gas 42 is absorbed into the cylinder 35 through a by-pass passage 33, a shaft seal device mounting space 30, a clearance in a bearing 25, and a feedback passage 36, etc. The sucked refrigerant gas 42 passes through a discharge valve device and a discharge cover 38 after compressed in the cylinder 35, and one part of the lubricating oil is separated in a discharge space 41, and the remaining lubricating oil is discharged together with compressed refrigerant gas via a discharge connection inlet 39 to an outside refrigerating device, thus reducing the wear and heat generation due to the slide of a slide part of the device. |
