Abstract: In a scroll type compressor, a revolving scroll having a disc portion and a blade portion is engaged with a stationary scroll having a disc portion and a blade portion. A gas is introduced from the outer peripheral portions of these scrolls and compressed in a pair of compression chambers defined between the scrolls, and a compressed gas is discharged. A first inlet and a second inlet, which are connected by a communication path, are formed at positions corresponding to the compression chambers, where the gas is compressed. Release means is provided between one of the compression chambers and a gas suction unit. The release means returns part of the gas in one of the compression chambers directly to, and part of the gas in the other compression chamber via the first and second inlets, the communication path and the one of the compression chambers to, the gas suction unit simultaneously by equal degrees.

Abstract: A rotary compressor includes a cylinder having a cylindrical compressing chamber, an eccentrically movable rotor disposed in the compressing chamber, and a reciprocally movable blade disposed in a blade guide groove which extends from the compressing chamber in a radial direction. The blade is provided with a pair of projections respectively extending from the one end of the blade toward the bottom of the blade guide groove, and the other end of the blade contacts the peripheral surface of the rotor. A pair of depressions are respectively formed at the bottom of the blade guide groove for permitting the projection pairs of the blade to reciprocally move into the corresponding depressions, thereby increasing the contacting portion between the blade and the blade guide groove in comparison with a conventional rotary compressor when the blade moves into the compressing chamber at a prescribed length.