Variable displacement compressor

A variable displacement compressor comprising:

• a housing in which is defined a space;
• a rotor eccentrically disposed in the space of the housing to define a compressor chamber and an intake chamber in the housing, said rotor including an outer side;
• a bypass passage formed in the housing for establishing fluid communication between the compression chamber and the intake chamber, the bypass passage being an arc-shaped slot that is arranged along a circumferential direction of the rotor at the outer side;
• and
• means for opening and closing the bypass passage, the means for opening and closing being positioned adjacent the bypass passage and being movable in a radial direction relative to the bypass passage depending on the pressure in the intake chamber, the opening and closing means including a bellows, a spring accommodated within the bellows, and a valve for being moved in unison with the bellows and the spring when the pressure in the intake chamber reaches a set value, the valve including a tapered portion which is brought into engagement with a projecting element of the housing during movement of the valve to establish a fluid tight engagement between the valve and an outer periphery of the bypass passage