Compressor

A compressor, comprising:

• a housing that includes:
• a low pressure refrigerant supply passage that conducts refrigerant, which has a low pressure;
• a compression chamber that compresses the refrigerant supplied from the low pressure refrigerant supply passage to a high pressure, which is higher than the low pressure, and discharges the compressed refrigerant out of the compression chamber;
• and
• an intermediate pressure refrigerant supply passage that is communicatable with the compression chamber through an injection port to inject the refrigerant, which has an intermediate pressure that is higher than the low pressure and is lower than the high pressure, into the compression chamber;
• and
• a check valve that includes a valve seat portion and a reed valve element and is received in a receiving hole of the intermediate pressure refrigerant supply passage, which is placed adjacent to a flow inlet of the injection port, wherein:
• the valve seat portion has a valve seat and a valve seat passage, wherein the valve seat passage extends through the valve seat portion to conduct the refrigerant therethrough;
• a center of the flow inlet of the injection port is offset from a central axis of the valve seat passage;
• the reed valve element is seatable against the valve seat to close the valve seat passage and is liftable from the valve seat to open the valve seat passage;
• a check valve chamber is formed in the receiving hole at a location between the valve seat portion and a wall surface of the receiving hole to receive at least a portion of the reed valve element when the reed valve element is lifted from the valve seat;
• and
• the reed valve element is abuttable against a bottom surface of the check valve chamber when the reed valve element is lifted away from the valve seat.