Abstract: A gas compressor includes at least two first and second discharge ports (45a, 45b) which are provided at an upstream side in a rotation direction of a rotor (50) along a peripheral direction of an inner peripheral surface 40a of a cylinder (40) with respect to a closest area (proximity part (48)) where the inner peripheral surface (40a) of the cylinder (40) and an outer peripheral surface (50a) of the rotor (50) are closest in a range of one revolution of a rotation shaft (51) and configured to discharge the refrigerant gas compressed in compression chambers (43). Of the first and second discharge ports (45a, 45b), on only the first discharge port (45a) closest to the proximity part (48), a cutout groove portion (47) is provided at a downstream-side edge portion of the first discharge port (45a) in the rotation direction of the rotor (50).

Abstract: A gas compressor includes a cylinder member, a rotor, and a plurality of vanes, wherein a proximal section is provided between the cylinder member and the rotor, so that a single cylinder room which performs a refrigerant gas compression cycle one-time per one rotation of the rotor is defined, and at least one sub-discharge section which maintains pressure of the refrigerant gas in a compression room in discharge pressure by releasing pressure of the compression room when the pressure of the refrigerant gas in the compression room reaches the discharge pressure.

Abstract: A compressor (100) has a compressor main body (60) formed so that one stroke cycle is performed in a compression room (43) which is partitioned by a rotor (50), cylinder (40), side blocks (20, 30), and vanes (58) during one revolution of the rotor (50). A cyclone block (70) separates a refrigerant oil (R) from refrigerant gas (G), wherein a second discharge section (46) which discharge the refrigerant gas (G) when the pressure inside the compression room (43) reaches the discharge pressure before the compression room (43) faces a first discharge section (45) is formed, and a communicating path (39) which connects a discharge chamber (45a) in the first discharge section (45) and a discharge chamber (46a) in the second discharge section (46) is formed on the upper stream side from the cyclone block (70).

Abstract: In a gas compressor, an outline shape of an inner peripheral surface (41) of a cylinder (40) is set such that in a point before a first compression chamber (43B) adjacent to a second compression chamber (43A) in an upstream side in a rotational direction (W) is exposed to a discharge hole (45b) of a primary discharge portion (45) with rotation of a rotor (50) in the rotational direction (W) (point where the first compression chamber (43B) is positioned upstream of an angular position of being exposed to the discharge hole (45b) of the primary discharge portion (45)), a pressure of refrigerant gas (G) inside the compression chamber (43) reaches a discharge pressure. Therefore, the discharge hole (45b) of the primary discharge portion (45) always discharges the refrigerant gas (G) from the compression chamber (43).

Abstract: A gas compressor includes at least two first and second discharge ports (45a, 45b) which are provided at an upstream side in a rotation direction of a rotor (50) along a peripheral direction of an inner peripheral surface 40a of a cylinder (40) with respect to a closest area (proximity part (48)) where the inner peripheral surface (40a) of the cylinder (40) and an outer peripheral surface (50a) of the rotor (50) are closest in a range of one revolution of a rotation shaft (51) and configured to discharge the refrigerant gas compressed in compression chambers (43). Of the first and second discharge ports (45a, 45b), on only the first discharge port (45a) closest to the proximity part (48), a cutout groove portion (47) is provided at a downstream-side edge portion of the first discharge port (45a) in the rotation direction of the rotor (50).

Abstract: A compressor (100) comprises: a compressor main body (60) being formed so that one cycle of stroke is performed by a compression room (43) which is partitioned by a rotor (50), cylinder (40), both side blocks (20, 30), and vanes (58) during one revolution of the rotor (50); a cyclone block (70) which separates a refrigerant oil (R) from refrigerant gas (G), wherein a second discharge section (46) which discharge the refrigerant gas (G) when the pressure inside the compression room (43) reaches the discharge pressure before the compression room (43) faces a first discharge section (45) is formed, and a communicating path (39) which connects a discharge chamber (45a) in the first discharge section (45) and a discharge chamber (46a) in the second discharge section (46) is formed on the upper stream side of than the cyclone block (70).

Abstract: In a gas compressor, an outline shape of an inner peripheral surface (41) of a cylinder (40) is set such that in a point before a compression chamber (43B) adjacent to a compression chamber (43A) in the upstream side in the rotational direction (W) is exposed to a discharge hole (45b) of a primary discharge portion (45) with rotation of a rotor (50) in the rotational direction (W) (point where the compression chamber (43B) is positioned upstream of an angular position of being exposed to the discharge hole (45b) of the primary discharge portion (45)), a pressure of the refrigerant gas (G) inside the compression chamber (43) reaches a discharge pressure. Therefore the discharge hole (45b) of the primary discharge portion (45) always discharges a refrigerant gas (G) from the compression chamber (43) to prevent generation of the discharge pulsation.

Abstract: A gas compressor includes a cylinder member (40), a rotor (50), and a plurality of vanes (58), wherein a proximal section (48) is provided between the cylinder member (40) and the rotor (50), so that a single cylinder room (42) which performs a refrigerant gas (G) compression cycle one-time per one rotation of the rotor (50) is formed, and at least one sub-discharge section (46) which maintains pressure of the refrigerant gas (G) in a compression room (43) in discharge pressure (P) by releasing the pressure of the compression room (43) when the pressure of the refrigerant gas (G) in the compression room (43) reaches the discharge pressure (P).