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: A compressor body is formed such that a compression chamber is divided by a rotor, a cylinder, side blocks and vanes, a housing which covers the compressor body is included, and an outline shape of a cross section of an inner circumferential surface of the cylinder is formed such that, in a period of one rotation of the rotor, (i) a region in which a capacity of the compression chamber increases, (ii) a region in which the capacity of the compression chamber reduces, (iii) a region in which a capacity reduction rate of the compression chamber is smaller than a capacity reduction rate of the region (ii), and (iv) a region in which the capacity reduction rate of the compression chamber is larger than a capacity reduction rate of the region (iii) are consecutively provided in order.

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: An electric compressor and a method for assembling the same include: an electric motor unit including a stator fixed to a housing by a press-fitting to an inner peripheral wall of the housing and a rotor rotatably arranged inside the stator; a compression unit configured to be driven by a rotational drive force of the electric motor unit and compress a coolant; and a guide member attached to an outer periphery of the stator and having a guiding curved surface portion configured to guide the press-fitting of the stator to the inner peripheral wall of the housing.

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 body (60) which is formed such that a compression chamber (43A) dr ivied by a rotor (50), a cylinder (40), side blocks (20, 30) and vanes (58) performs only one cycle of intake, compression and discharge in a period of one rotation of the rotor (50), and a housing (10) which covers the compressor body (60) are included, and an outline shape of a cross-section of an inner circumferential surface (41) of the cylinder (40) is formed such that in the period of the one rotation of the rotor (50), (i) a region in which a capacity of the compression chamber 43A rapidly increases, (ii) a region in which the capacity of the compression chamber 43A rapidly reduces, (iii) a region in which a capacity reduction rate of the compression chamber 43A is smaller than a capacity reduction rate of the region (ii), and (iv) a region in which the capacity reduction rate of the compression chamber 43A is larger than a capacity reduction rate of the region (iii) are consecutively provided in order.

Abstract: A rotary vane compressor includes a cylinder chamber having an ellipsoidal inner wall shape, a rotor rotatably provided in the cylinder chamber, a vane held in the rotor so as to contact with an inner wall surface of the cylinder chamber along with a rotation of the rotor, a vane slot provided on the rotor and offset on a reverse rotational side of the rotor from a radial line passing over a rotational center of the rotor, and a controller for controlling a rotation of the rotor. The controller reversely rotates the rotor for a predetermined time upon activating the compressor. According to the compressor, chattering can be prevented by surely protruding the vane from the vane slot without providing extra parts. In addition, the vane can be produced with easy working processes at low cost.

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: A vane compressor includes a cylinder block, a cylinder chamber having an ellipsoidal inner wall, a rotor whose outer circumferential surface is provided with vane slots formed thereon, a drive source for the rotor, and vanes housed in the vane slots, respectively. The rotor is rotated by the drive source while the vanes are protruded from the vane slots by backpressure generated in backpressure spaces in the vane slots to contact end edges of the vanes with the inner wall of the cylinder chamber. The compressor further comprises a stop mechanism that makes the rotor stopped at a predetermined rotational position where a difference between a total volume of the backpressure spaces when operated and a total volume of the backpressure spaces when stopped becomes minimum. According to the compressor, chattering can be prevented without extra workings on the vanes or the rotor and without providing extra parts.

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 horizontal type electrically driven gas compressor includes an electric motor installed in a suction chamber of a housing, a gas compression mechanism section installed in the housing and driven by the electric motor, a sucked refrigerant guide path for guiding a refrigerant from the suction chamber to the gas compression mechanism section, and a lubricating oil supply path for supplying a lubricating oil, which has been collected and stagnated in a bottom portion of the suction chamber, to the sucked refrigerant guide path, the lubricating oil supply path fluidly connecting the sucked refrigerant guide path and the bottom portion of the suction chamber at the position of the bottom portion of the suction chamber.

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).

Abstract: A rotor of a vane compressor includes vanes that reciprocates in vane slots, coil springs that urge the vanes, and guide members each having a press-in end pressed into the vane and an accommodated end and inserted into the coil spring. When an outer diameter of the guide member is a, an inner diameter of the coil spring is b1, an outer diameter thereof is b2, and an inner diameter an accommodation hole for the coil spring is c, (b1?a)<(c?b2) is satisfied. A diameter of an end (a first contact portion) of the coil spring on a side of the accommodated end is larger than a diameter of another end (a second contact portion) thereof on a side of the press-in end. According to the compressor, contacts between the accommodation hole and the guide member can be prevented without high accuracy forming of the accommodation hole.

Abstract: Provided is an electric compressor (1), which drives, in a cylindrical housing (2), a compressor (4) using an electric motor (3) disposed in the housing (2). The electric compressor is characterized in that the electric motor (3) is formed with a stator (7), which is fixed to the housing (2), and which generates a magnetic force when a current is carried, and a rotor (9), which is rotatably disposed inside of the stator (7), and which rotates with the magnetic force generated by the stator (7). The electric compressor is also characterized in that the stator (7) is press-fitted in a cylindrical body (6) composed of a material having a linear expansion coefficient close to that of the stator (7), and that the cylindrical body (6) is partially press-fitted at a plurality of areas in the inner wall (10) of the housing (2).

Abstract: The present invention relates to an electric compressor integrally including a compression mechanism and an electric motor, and an object thereof is to prevent the housing from being elongated in the axial direction and improve the sealability and the mountability of the compression mechanism. According to the present invention, a hermetic terminal (45) electrically connecting the electric motor (30) and a motor drive circuit (40) is attached within a swelled-space portion (50) swelled toward radial outside of a housing (11) so as to be continuous with a mounting bracket (17) of the housing (11). Accordingly, the distance between the compression mechanism and motor drive circuit can be shortened.

Abstract: A horizontal type electrically driven gas compressor includes an electric motor installed in a suction chamber of a housing, a gas compression mechanism section installed in the housing and driven by the electric motor, a sucked refrigerant guide path for guiding a refrigerant from the suction chamber to the gas compression mechanism section, and a lubricating oil supply path for supplying a lubricating oil, which has been collected and stagnated in a bottom portion of the suction chamber, to the sucked refrigerant guide path, the lubricating oil supply path fluidly connecting the sucked refrigerant guide path and the bottom portion of the suction chamber at the position of the bottom portion of the suction chamber.

Abstract: A vane compressor includes a cylinder block, a cylinder chamber having an ellipsoidal inner wall, a rotor whose outer circumferential surface is provided with vane slots formed thereon, a drive source for the rotor, and vanes housed in the vane slots, respectively. The rotor is rotated by the drive source while the vanes are protruded from the vane slots by backpressure generated in backpressure spaces in the vane slots to contact end edges of the vanes with the inner wall of the cylinder chamber. The compressor further comprises a stop mechanism that makes the rotor stopped at a predetermined rotational position where a difference between a total volume of the backpressure spaces when operated and a total volume of the backpressure spaces when stopped becomes minimum. According to the compressor, chattering can be prevented without extra workings on the vanes or the rotor and without providing extra parts.

Abstract: A rotary vane compressor includes a cylinder chamber having an ellipsoidal inner wall shape, a rotor rotatably provided in the cylinder chamber, a vane held in the rotor so as to contact with an inner wall surface of the cylinder chamber along with a rotation of the rotor, a vane slot provided on the rotor and offset on a reverse rotational side of the rotor from a radial line passing over a rotational center of the rotor, and a controller for controlling a rotation of the rotor. The controller reversely rotates the rotor for a predetermined time upon activating the compressor. According to the compressor, chattering can be prevented by surely protruding the vane from the vane slot without providing extra parts. In addition, the vane can be produced with easy working processes at low cost.