Abstract: A scroll-type fluid machine (1) in which in which a spiral body (50, 52) and an end plate (8a, 10a) come into sliding contact with each other between fixed and movable scrolls (8, 10) with a chip seal (56, 58), which is provided to the spiral body, intervening therebetween. The spiral body of at least one of the scrolls is provided, in the corner on the end plate side thereof, with a base portion (62) formed of a concave arc face (64), and the chip seal of the other scroll is provided, in the corner of a tip end (56a) thereof, with a fillet (70) that is formed of a first convex arc face (72) that comes into sliding contact with the concave arc face.

Abstract: Provided is a scroll fluidic device that is capable of reducing suction pressure loss as well as suppressing discharge pulsations and reducing noise. The scroll fluidic device is characterized in that a fixed scroll member is integrally formed with a center housing on the inside of the center housing disposed between a front housing and a rear housing; the end surface of the outer shell of the center housing is positioned lower than the height of a scroll lap of the fixed scroll member, with an end plate of the fixed scroll member served as a reference of position in the height direction; and a corridor-like space extending in the device circumferential direction, which is surrounded by an outer shell forming portion of the center housing, the inner surface of an outer shell of the front housing, the scroll lap of the fixed scroll member, and the end plate of a movable scroll member, is formed.

Abstract: Disclosed is a scroll fluid machine configured from inexpensive materials and provided with a rotation prevention mechanism with excellent durability. In the scroll fluid machine, a fixed scroll, the spiral body of which has been vertically disposed on one end surface of an endplate, and a movable scroll, the spiral body of which has been vertically disposed on one end surface of the endplate, are arranged eccentrically to and out of phase with each other such that the spiral bodies engage with each other and the movable scroll turns relative to the fixed scroll. The scroll fluid machine is characterized by being provided with a rotation prevention mechanism comprising a movable-side pin that protrudes from the other surface of the endplate of the movable scroll, a fixed-side pin that protrudes from the housing side towards the other surface of the endplate of the movable scroll, and a rotation prevention member held from both sides by the movable-side pin and the fixed-side pin.

Abstract: An object of the present invention is to provide a wobble plate compressor equipped with a mechanism for preventing the rotation of the wobble plate which is simply structured, producible at low cost, and does not cause heavy noise or vibration. A wobble plate compressor comprises a main shaft driven by a power source, a wobble plate driven by the main shaft to swing, a piston connected to the wobble plate by a connecting rod, and a cylinder bore extending parallel to the main shaft to accept the piston. The connecting rod is connected to the wobble plate by a ball joint, precession of the connecting rod is allowed when the piston moves reciprocally, and the outer circumferential surface of the piston is forced against the inner circumferential surface of the cylinder bore when the wobble plate is driven by the main shaft to rotate and the connecting rod is driven by the rotating wobble plate to swing beyond the range of the precession. Thus, rotation of the wobble plate is prevented.

Abstract: A scroll type fluid machine having a rotation-preventing member extending between at least one of a fixed scroll and a housing which form a non-orbiting part and a movable scroll and preventing rotation of the movable scroll, and also having a mechanism for making the rotation-preventing member movable, the mechanism being provided to the rotation-preventing member for permitting a movement of the rotation-preventing member itself which movement is required for the rotation-preventing member to permit an orbital movement of the movable scroll. The scroll type fluid machine, with the rotation-preventing mechanism for the movable scroll, can be easily assembled into a target assembly condition, and can be formed to be small-sized and light-weighted.

Abstract: A variable displacement compressor comprising a first control means for detecting the suction pressure of fluid or the crank chamber pressure and controlling the suction pressure to a target control value, and a second control means including means for detecting high-pressure side pressure to control the displacement of the compressor so as to relax an increase in the high-pressure side pressure when it is equal to or higher than a predetermined threshold and increasing the control value of the suction pressure depending on the increase in the high-pressure side pressure in a region exceeding the threshold. The control system is simple, the control valve is inexpensive and simple and capable of stabilized operation, and the variable displacement compressor has the internal control means suitable for refrigeration cycle operating in a supercritical region.

Abstract: In a scroll-type fluid machine (4), a refrigerant in a discharge chamber (80) is adjusted at prescribed discharge pressure by using a discharge valve (84), discharged from a scroll unit (52), and supplied to a refrigeration circuit (2), and the machine has a circulation path (7) for introducing the refrigerant in the discharge chamber from the refrigeration circuit toward a drive casing (22) while maintaining the refrigerant pressure, and an inlet path (93) formed in a compression casing (24) and leads the refrigerant in the circulation path to the rear side of a movable scroll (54) to make the led refrigerant counteract the refrigerant discharge pressure acting on the front side of the movable scroll.

Abstract: The present invention provides a reciprocating compressor for a refrigerator capable of restraining an increase in temperature of a refrigerant discharged and increasing refrigerant compression efficiency. The compressor according to the present invention includes a housing (16) having cylinder bores (30), pistons (32) fitted in the respective cylinder bores (30) and each capable of reciprocating motion in the bore (30), an intermediate pressure chamber (68) arranged in the housing (16) and supplied with the refrigerant at a low temperature from a gas-liquid separator (10) of the refrigerator, and a rotary valve (78) arranged between the chambers (33, 68). The rotary valve (78) is rotated in association with a main shaft (34) of the compressor and opened to inject the low-temperature refrigerant into each compression chamber (33) from the intermediate pressure chamber (68) while the compression chamber (33) is in a process of compressing the refrigerant.

Abstract: [Object of the Invention] An object of the present invention is to provide a wobble plate compressor equipped with a mechanism for preventing the rotation of the wobble plate which is simply structured, producible at low cost, and does not cause heavy noise or vibration. [Disclosure of Invention] A wobble plate compressor comprises a main shaft driven by a power source, a wobble plate driven by the main shaft to swing, a piston connected to the wobble plate by a connecting rod, and a cylinder bore extending parallel to the main shaft to accept the piston. The connecting rod is connected to the wobble plate by a ball joint, precession of the connecting rod is allowed when the piston moves reciprocally, and the outer circumferential surface of the piston is forced against the inner circumferential surface of the cylinder bore when the wobble plate is driven by the main shaft to rotate and the connecting rod is driven by the rotating wobble plate to swing beyond the range of the precession.

Abstract: A variable displacement compressor comprising a first control means for detecting the suction pressure of fluid or the crank chamber pressure and controlling the suction pressure to a target control value, and a second control means including means for detecting high-pressure side pressure to control the displacement of the compressor so as to relax an increase in the high-pressure side pressure when it is equal to or higher than a predetermined threshold and increasing the control value of the suction pressure depending on the increase in the high-pressure side pressure in a region exceeding the threshold. The control system is simple, the control valve is inexpensive and simple and capable of stabilized operation, and the variable displacement compressor has the internal control means suitable for refrigeration cycle operating in a supercritical region.

Abstract: In a scroll-type fluid machine (4), a refrigerant in a discharge chamber (80) is adjusted at prescribed discharge pressure by using a discharge valve (84), discharged from a scroll unit (52), and supplied to a refrigeration circuit (2), and the machine has a circulation path (7) for introducing the refrigerant in the discharge chamber from the refrigeration circuit toward a drive casing (22) while maintaining the refrigerant pressure, and an inlet path (93) formed in a compression casing (24) and leads the refrigerant in the circulation path to the rear side of a movable scroll (54) to make the led refrigerant counteract the refrigerant discharge pressure acting on the front side of the movable scroll.

Abstract: A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, and a second compression mechanism, which is driven by a second drive source. A first discharge port of the first compression mechanism and a second discharge port of the second compression mechanism are connected to a single discharge path.

Abstract: The present invention provides an electric compressor that can realize high durability and high efficiency by means of a low-cost construction, and is advantageous in providing a construction for using a carbon dioxide refrigerant. In the electric compressor in accordance with the present invention, the rotational motion of an inclined plate 23 having a predetermined fixed angle of inclination is converted to swinging motion of a swing plate 24 that swings while the rotation thereof is regulated, and pistons 21 are driven by the swinging motion of the swing plate 24. Therefore, a construction having no sliding part due to the rotation of the inclined plate 23 can be provided, so that the durability can be improved.

Abstract: In a swash-plate compressor for compressing a fluid, the compressor includes a cylinder block having a cylinder bore and a piston having a first end portion reciprocally movable in the cylinder bore and a second end portion opposite to the first end portion. The second end portion has a pair of engaging portions faced to each other with a space left therebetween and a side wall portion connecting the engaging portions to each other. The compressor further includes a swash plate having a part inserted between the engaging portions and driven to rotate and a pair of sliding members interposed between the engaging portions and the swash plate, respectively. Each of the sliding members has a flat portion slidably contacted with the swash plate and a spherical portion opposite to the flat portion. Each of the engaging portions has a contact surface slidably contacted with the spherical portion. Each of the contact surfaces extends to the side wall portion.

Abstract: An apparatus for controlling compressor discharge capacity includes a variable capacity compressor, a capacity adjustment device, a signal processing device, a capacity setting device, and a signal comparing device. The capacity adjustment device regulates a discharge capacity of the variable capacity compressor. The signal processing device receives a signal corresponding to a discharge capacity of the variable capacity compressor. The capacity setting device sets a first discharge capacity target value for the variable capacity compressor. The signal comparing device compares the discharge capacity signal to the fist discharge capacity target value and sends an activation signal to the capacity adjustment device, such that the discharge capacity signal approaches the first discharge capacity value.

Abstract: A compressor includes a front housing, a cylinder block, a cylinder head, a torque transmission mechanism, a reciprocating mechanism, and torque determination means. The torque transmission mechanism includes a pulley, a plate-shaped elastic member, a hub, a drive shaft, and a rotor. The torque determination means includes a first marker affixed to the pulley, a second marker affixed to the hub a first sensor affixed to the front housing which generates a first timing signal when the first marker is positioned within substantially the same vertical plane as the first sensor, and a second sensor affixed to the front housing which generates a second timing signal when the second marker is positioned within substantially the same vertical plane as the second sensor. Moreover, there is a time differential between the generation of the first and second timing signals corresponding to the angular offsets, and the torque of the compressor is determinable from the time differential.

Abstract: A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, and a second compression mechanism, which is driven by a second drive source. A first discharge port of the first compression mechanism and a second discharge port of the second compression mechanism are connected to a single discharge path.

Abstract: An apparatus for controlling compressor discharge capacity includes a variable capacity compressor, a capacity adjustment device, a signal processing device, a capacity setting device, and a signal comparing device. The capacity adjustment device regulates a discharge capacity of the variable capacity compressor. The signal processing device receives a signal corresponding to a discharge capacity of the variable capacity compressor. The capacity setting device sets a first discharge capacity target value for the variable capacity compressor. The signal comparing device compares the discharge capacity signal to the fist discharge capacity target value and sends an activation signal to the capacity adjustment device, such that the discharge capacity signal approaches the first discharge capacity value.

Abstract: A compressor includes a front housing, a cylinder block, a cylinder head, and a torque transmission mechanism. The torque transmission mechanism includes a pulley, a plate-shaped elastic member connected to the pulley, a hub connected to the plate-shaped elastic member, a drive shaft connected to the hub, and a rotor connected to the drive shaft. The compressor also includes a reciprocating mechanism connected to the torque transmission mechanism. The compressor further includes torque determination means. The torque determination means includes a first marker affixed to the pulley and a second marker affixed to the hub. The torque determination means also includes a first sensor affixed to the front housing which generates a first timing signal when the first marker is positioned within substantially the same vertical plane as the first sensor.

Abstract: In a swash plate type compressor in which a shoe (3) is interposed between a swash plate (5) and a reciprocally movable piston (2), a concave curved surface (21a) is made at an end of the piston to have an elliptical portion with an elliptical shape in cross section. The shoe has a convex spherical surface inserted into the concave curved surface and reciprocally moves the piston in accordance with a rotation of the swash plate.