Oil separator

A system comprising:

• a compressor that supplies compressed air;
• an air dryer that dries the compressed air supplied from the compressor and supplies dried compressed air, the air dryer comprising a supplying line that supplies the dried compressed air and an exhaust line that discharges purge air;
• and
• an oil separator connected to the exhaust line, the oil separator comprising:
• a housing including an inlet for introducing the purge air from the air dryer and an outlet for discharging cleaned air;
• a plurality of expansion chambers arranged next to one another in a vertical direction, a first expansion chamber of the plurality of expansion chambers comprising a vertically-extending wall portion defining a side face, wherein a through hole is formed at the side face of the first expansion chamber, and the inlet of the housing is connected to the through hole;
• a communication section that connects the inside of the housing and the outlet to each other;
• and
• a collected liquid storage portion located below the plurality of expansion chambers, wherein
• one or more of the plurality of expansion chambers comprise an impingement member,
• the oil separator is configured to introduce the purge air into the housing through the inlet, and cause the purge air to strike the impingement member to separate oil from the introduced purge air, thereby collecting the oil and to discharge cleaned air from the outlet via an expansion chamber of the plurality of expansion chambers that is different from the first expansion chamber,
• the inlet and the outlet are located in an upper section of the housing, and
• each of the one or more of the plurality of expansion chambers separates oil from the introduced purge air and discharges the separated oil downward;
• and
• wherein the expansion chamber of the plurality of expansion chambers that is different from the first expansion chamber is directly connected to, and communicates with, the collected liquid storage portion.

A system comprising:

• a compressor that supplies compressed air;
• an air dryer that dries the compressed air supplied from the compressor and supplies dried compressed air, the air dryer comprising a supplying line that supplies the dried compressed air and an exhaust line that discharges purge air;
• and
• an oil separator connected to the exhaust line, the oil separator comprising:
• a lid including an inlet for introducing purge air from the air dryer and an outlet for discharging cleaned air;
• a plurality of expansion chambers arranged next to one another in a vertical direction, a first expansion chamber of the plurality of expansion chambers comprising a vertically-extending wall portion defining a side face, wherein a through hole is formed at the side face of the first expansion chamber, and the inlet of the housing is connected to the through hole;
• a housing attachable to the lid;
• and
• an attaching and detaching mechanism for allowing the lid to be attached to and detached from the housing, wherein
• the oil separator is configured to cause the purge air to flow into the housing and strike an impingement member to separate oil from the purge air, thereby collecting liquid containing oil, and to discharge cleaned air from the outlet via an expansion chamber of the plurality of expansion chambers that is different from the first expansion chamber, and
• a through hole, which permits the purge air introduced through the inlet to flow vertically downward, is formed between the expansion chambers;
• and
• wherein the expansion chamber of the plurality of expansion chambers that is different from the first expansion chamber is directly connected to, and communicates with, a collected liquid storage portion.