| 摘要 |
PROBLEM TO BE SOLVED: To obtain clean compressed air from an oil cooling type rotary compressor constituted compactly by reducing oil contained in condensed water produced from compressed air. SOLUTION: A screw compressor body 12 having a pair of a male and a female screw rotors 3 accommodated in a casing is formed with a suction opening 52 and a discharge opening 4. Compressed air sucked through the suction opening 52 and discharged through the discharge opening 4 contains lubricating oil for lubricating and cooling the compressor body 12. A second oil separator 40 is provided on the lower stream side of an oil separator 53 for separating compressed air from the lubricating oil and compressed air removed of oil by the second oil separator 40 is guided to an after-coolar 10. Because oil is almost completely separated and removed from compressed air by the second oil separator 40, condensed water condensed by the after-cooler 10 and the like contains practically no oil.
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