Rotary compressor

摘要

In a rotary compressor for compressing a refrigerant gas by a compressor element adapted to be rotated by an electric motor, the improvement comprises a cylindrical member provided inside or outside the closed container and communicated with the first intake passage and with the first discharge passage; a second intake passage communicated with the cylindrical member and with the compressor element; a second discharge passage communicated with the cylindrical member and within the closed container; a first communication passage for communicating the second intake passage with one end of the cylindrical member; a second communication passage for communicating the closed container with the other end of the cylindrical member; and a valve member provided in the cylindrical member; and a spring which urges the end of the valve near the first communication passage; the valve member being moved to a first position to communicate the first intake pasage with the second intake passage and also communicate the first discharge passage with the second discharge passage when one end of the valve member is urged by a discharge pressure of the refrigerant gas, through the second communication passage while the valve member being moved to a second position to make the first intake passage out of communication with the second intake passage and also make the first discharge passage out of communication with the second discharge passage when the other end of the valve member is urged by a reverse currernt pressure of the refrigerant gas from the first communication passage and a spring pressure.