Problem to be solved: to provide an oil separator capable of suppressing oil intake into the passage air.The oil separator 3 separates the oil by separating the air containing the oil introduced into the case 31 into the urethane foam 50.Oil separator 3Introduction port 35 introducing airAn exhaust outlet is provided at the top of the housingThe first expansion chamber 45 expands air introduced into the caseThe second expansion chamber 51 andCommunicate vertically with the second expansion chamberContaining urethane foam 50The accommodating member 48 for discharging the introduced air to the side isA communication part 32A communicating the inside of the case 31 with the discharge portA drain reservoir 54 provided below the accommodating member 48 and.Diagram
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