Compressor

A compressor, comprising:

• cylinder blocks positioned between front and rear housing and having a swash plate chamber provided therein, the front and rear housing defining external appearances of both ends of the compressor;
• a driving shaft having a swash plate rotatably installed in the swash plate chamber, the swash plate chamber having a refrigerant suction passage formed at one side thereof, the refrigerant suction passage allowing refrigerant to be inhaled therethrough;
• pistons respectively received in a plurality of cylinder bores arranged annularly around the driving shaft and reciprocated in cooperation with the rotation of the swash plate to compress refrigerant supplied to the cylinder bores, whereby the refrigerant flows out through front and rear discharge chambers of the cylinder blocks;
• a communication passage formed to communicate with both the front and rear discharge chambers;
• an oil separation chamber provided therein with a cylindrical oil separation conduit for centrifugally separating oil and refrigerant introduced therein from each other;
• one discharge passage allowing the communication passage to communicate with the oil separation chamber so that refrigerant supplied from the front and rear discharge chambers is collected through the communication passage and then discharged to the oil separation chamber;
• a discharge chamber positioned at one side of the oil separation chamber to receive the refrigerant separated from the oil by the oil separation conduit and then discharge the refrigerant to the outside;
• and
• an oil return unit formed to communicate with the oil separation chamber and returning the oil separated from the refrigerant by the oil separation conduit to the swash plate chamber.