Patent ID: 7293968

Claim:
A capacity-changing unit of an orbiting vane compressor, comprising: an orbiting vane which compresses refrigerant gas sucked by an orbiting of a circular vane, the circular vane being formed on a vane plate and positioned in an annular space formed between an inner wall of a cylinder and an inner ring of the cylinder so as to divide the annular space into an inner compression chamber and an outer compression chamber, the cylinder comprising inner and outer outlet ports which communicate with the inner and outer compression chambers and an inlet port through which the refrigerant gas is sucked; a communication line having an end which communicates with the outer compression chamber; a bypass line which communicates with the communication line and the inlet port; a pressurizing line connected to the inner and outer outlet ports of the cylinder; a piston which closes the communication line and the bypass line based on a discharge pressure of refrigerant gas passing through the pressurizing line; and a solenoid which moves the piston and opens the communication line and the bypass line based on an applied power.