Abstract: A compressor of an embodiment includes three suction pipes. A first center of a first suction pipe, a second center of a second suction pipe, and a third center of a third suction pipe are positioned at vertices of a triangle. A first distance between the first center and a center of a compressor main body is smaller than a second distance between the second center and the center of the compressor main body and a third distance between the third center and the center of the compressor main body. The first suction pipe is connected to a first suction port on an uppermost side. A second virtual plane on which a central axis of a main curved pipe part of the second suction pipe is disposed and a third virtual plane on which a central axis of a main curved pipe part of the third suction pipe is disposed are inclined to opposite sides from each other with respect to a first virtual plane on which a central axis of a main curved pipe part of the first suction pipe is disposed.

Abstract: The present disclosure relates to an air conditioner and a compressor. The compressor includes: a first cylinder assembly, including a first cylinder body and a first sliding vane, a volume control assembly, including a pressure regulator; wherein the pressure regulator is provided with a storage cavity, and the storage cavity is communicated with the variable volume control cavity; wherein the first sliding vane is configured to slide in a reciprocating manner between the first compression cavity and the variable volume control cavity along the first sliding vane groove, to change the volume of the variable volume control cavity; and the refrigerant introduced into the variable volume control cavity flows between the variable volume control cavity and the storage cavity along with a change of the volume of the variable volume control cavity.

Abstract: A rotary compressor includes at least one cylinder in which a discharge guide groove is disposed at one side of a vane slot; a roller orbitably provided in the cylinder, and disposed with a hinge groove on an outer circumferential surface thereof; a vane in which one end portion thereof is rotatably inserted into the hinge groove of the roller, and the other end portion thereof is slidably inserted into the vane slot of the cylinder; and a plurality of bearing plates that seals both side surfaces of the cylinder, and at least one side of which is disposed with a discharge port to communicate with the discharge guide groove. The discharge port communicates with a refrigerant residual space defined between the vane slot and the discharge guide groove. Refrigerant in the refrigerant residual space may be discharged even after the roller passes through the discharge guide groove.

Abstract: An electric pump includes a housing that includes a gear chamber, a rotor chamber, and a motor chamber. The electric pump includes a first seal member, a second seal member, and a third seal member. The first seal member seals a space between the gear chamber and the rotor chamber. The second seal member seals the space between the gear chamber and the rotor chamber. The third seal member seals a space between the gear chamber and the motor chamber. The third seal member seals the space between the gear chamber and the motor chamber to a lesser extent than the first seal member and the second seal member seal the space between the gear chamber and the rotor chamber.

Abstract: A rotary compressor may include an outflow passage through which refrigerant flows out of a compression space. The outflow passage may include at least one first outflow guide portion disposed in a main bearing or a sub bearing, at least one second outflow guide portion formed through between both axial ends of a roller, and at least one third outflow guide portion disposed in a bearing opposite to the bearing with the at least one first outflow guide portion based on the roller. This may minimize an amount of refrigerant remaining in the compression space. A pressure difference on a front of a vane may also be eliminated, which may suppress or prevent vane jumping. As the outflow passage is periodically opened, refrigerant leakage may be suppressed or prevented during a compression stroke.

Abstract: A compressor installation structure for a vehicle has: a first compressor that is installed in a vehicle and that is driven by a first displacement body repeating a first movement at a predetermined cycle; and a second compressor that is installed in the vehicle and that is driven by a second displacement body repeating a second movement at the predetermined cycle, wherein, in a state in which the first compressor and the second compressor are installed in the vehicle, a first displacement direction of a first centroid of the first displacement body at a time at which the first displacement body performs the first movement is an opposite direction from a second displacement direction of a second centroid of the second displacement body at a time at which the second displacement body performs the second movement.

Abstract: A variable capacity compressor is provided, including: two cylinders and a middle plate; at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end is connected to a suction chamber of the other one of the two cylinders. In present disclosure, by setting a flow channel in the middle plate of the variable capacity compressor, the exhaust chamber of one cylinder is connected to the suction chamber of the other cylinder. When the flow channel is completely closed, the two cylinders operate independently; when the flow channel is opened, the refrigerant in the exhaust chamber flows into the suction chamber through the flow channel, that is, the upper cylinders and the lower cylinder are connected to each other, which can adjust the capacity of the compressor.

Abstract: A compressor may include a shell assembly, a compression mechanism, a driveshaft, a first bearing, a second bearing, a third bearing, and a surface supporting the third bearing. The compression mechanism may include first and second compression members. The driveshaft may be coupled to the first compression member to rotate the first compression member relative to the second compression member. The first bearing may support the driveshaft for rotation about a first axis. The second bearing may support the driveshaft for rotation about the first axis. The third bearing defines a second axis. The third bearing may support the second compression member for rotation relative to the first compression member. The surface may support the third bearing such that the third bearing is able to roll along the surface to move the second compression member and the second axis in a radial direction relative to the first compression member.

Abstract: A rotary compressor may include a rotational shaft coupled to a drive motor and having a central passage, an eccentric portion provided eccentrically from the rotational shaft, a cylinder through which the rotational shaft passes, the cylinder forming a compression chamber in which refrigerant is accommodated, a roller an inner circumferential surface of which is in close contact with an outer circumferential surface of the eccentric portion, the roller rolling and compressing a refrigerant, a vane inserted into the cylinder, the vane protruding from an inner circumferential surface of the cylinder when backpressure is applied to the vane to be in contact with an outer circumferential surface of the roller, and partitioning the compression chamber into a plurality of chambers; a plurality of oil supply grooves on an outer circumferential surface of the eccentric portion; and an oil supply passage that communicates the central passage with the oil supply grooves.

Abstract: A rotary engine that starts and operates on compression-ignition of a heavy fuel without a secondary ignition source. The rotary engine includes a rotor housing that forms an epitrochoidal-shaped chamber having linear side portions extending between rounded end portions. A three-flanked rotor is disposed in the chamber to rotate and operate in a manner similar to that of a common Wankel-style rotary engine. The rotor and chamber are configured to provide a compression ratio sufficient to produce compression-ignition of a heavy fuel. The rotor includes apex seal and side seal mounting blocks formed from hardened materials and that are simply removable from the rotor for replacing apex and side seals. The apex seals may include multiple non-parallel seal members at each apex and the apex seals and the side seals may overlap or intersect a corner seal to increase sealing under high compression loads produced by the rotor/chamber configuration.

Abstract: A positive displacement rotary compressor is designed for near isothermal compression, high pressure ratios, high revolutions per minute, high efficiency, mixed gas/liquid compression, a low temperature increase, a low outlet temperature, and/or a high outlet pressure. Liquid injectors provide cooling liquid that cools the working fluid and improves the efficiency of the compressor. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns.

Abstract: A scroll-type compressor includes: a movable scroll including a low-stage movable tooth portion having a spiral shape and protruding from a first side of a movable substrate portion in an axial direction, and a high-stage movable tooth portion having a spiral shape and protruding from a second side of the movable substrate portion in the axial direction; and a shaft arranged to extend through the movable substrate portion and causing the movable scroll to undergo revolution motion. A low-stage compression mechanism and a high-stage movable compression mechanism are provided on opposite sides of the movable substrate portion in the axial direction. The numbers of curling of the low-stage movable tooth portion and the high-stage movable tooth portion are set to be one.

Abstract: A positive displacement rotary compressor is designed for near isothermal compression, high pressure ratios, high revolutions per minute, high efficiency, mixed gas/liquid compression, a low temperature increase, a low outlet temperature, and/or a high outlet pressure. Liquid injectors provide cooling liquid that cools the working fluid and improves the efficiency of the compressor. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns.

Abstract: A rotary compressor (100) includes a closed casing (1), a cylinder (15), a piston (28), a lower bearing member (72), a vane (33), a suction port (20), a discharge port (41), and a partition member (64). The partition member (64) is attached to the lower bearing member (72) so as to form a space enclosed by the partition member (64) and the lower bearing member (72) at a position adjacent to the lower bearing member (72). A portion of an oil stored in the oil reservoir (22) flows into the enclosed space, and thereby an oil retaining portion (53) is formed. The oil retaining portion (53) is located on the same side as the suction port (20) with respect to a reference plane (H1).

Abstract: An internal combustion engine with at least two rotatable bodies each defining at least one combustion chamber of variable volume and, for each rotatable body: a pilot subchamber, a pilot fuel injector having a tip in communication with the pilot subchamber, an ignition element positioned to ignite fuel within the pilot subchamber, and a main fuel injector spaced apart from the pilot fuel injector. The engine includes a common first fuel conduit in fluid communication with each main fuel injector, and a common second fuel conduit in fluid communication with each pilot fuel injector. First and second pressure regulating mechanisms which are settable at different pressure values from one another respectively regulate a fuel pressure in the first and second conduits. A method of combusting fuel in an internal combustion engine is also provided.

Abstract: A positive displacement rotary compressor is designed for near isothermal compression, high pressure ratios, high revolutions per minute, high efficiency, mixed gas/liquid compression, a low temperature increase, a low outlet temperature, and/or a high outlet pressure. Liquid injectors provide cooling liquid that cools the working fluid and improves the efficiency of the compressor. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns.

Abstract: A compressor is provided and may include a shell, a motor assembly, a drive shaft, a first compression mechanism, and a second compression mechanism. The motor assembly may be disposed within the shell. The drive shaft may be powered by the motor assembly. The first compression mechanism may be disposed within the shell and may be driven by the motor assembly. The second compression mechanism may be driven by the motor assembly.

Abstract: A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three equally spaced idlers. One idler then transmits rotation and torque into the second stage. The second orbiting scroll has involutes upon both surfaces to engage the second fixed scroll inwardly and the first fixed scroll outwardly. The first fixed scroll has fins upon its back that extend into the atmosphere to transfer heat to air cool the pump. This pump also has a fan accelerating heat transfer. The pump operates the scrolls directly from a motor or from a motor and magnetic coupling so that the atmosphere does not infiltrate the pump.

Abstract: A compressor is provided that includes an accumulator formed in an internal space of a shell to reduce a size of the compressor. An accumulator space may be formed using the shell of the compressor, thereby simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. A discharge passage may be formed in a rotating body to enhance a cooling effect of a drive motor, and an oil separating member may be installed in the discharge passage to prevent oil from being excessively leaked out. A center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration noise of the compressor caused by the accumulator. An area for installing a compressor including the accumulator may be minimized to enhance design flexibility of an outdoor device.

Abstract: A compressor may include a crankshaft, first and second cylinder housings, first and second rotors, a divider plate, and first and second valves. The crankshaft includes first and second eccentric portions. The cylinder housings define cylindrical recesses. The rotors are disposed within respective cylindrical recesses and engage respective eccentric portions of the crankshaft. The first rotor and the first cylindrical recess define a first compression chamber therebetween. The second rotor and the second cylindrical recess define a second compression chamber therebetween. The divider plate may be disposed between the cylinder housings and may include first and second fluid openings in communication with the first and second compression chambers. The valves may be moveable relative to the divider plate between a first position allowing fluid flow through the fluid openings and a second position restricting fluid flow through the fluid openings.

Abstract: A device that enhances compressor efficiency by reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed by a compression unit. A low-stage discharge muffler space is formed in the shape of a ring around a drive shaft. In the low-stage discharge muffler space, a communication port flow guide is provided so as to cover a predetermined area of an opening of a communication port from a side of a flow path in a reverse direction out of two flow paths in different directions around the drive shaft from a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit to the communication port through which the refrigerant flows out. The communication port flow guide transforms a direction of a flow into a direction of a connecting flow path.

Abstract: A rotary compressor includes a compression unit that includes an annular cylinder including a cylinder inner wall, a suction port, and a vane groove, an end plate covering an end portion of the cylinder, an annular piston revolving in the cylinder to form an actuation chamber between the cylinder inner wall and the annular piston; and a vane protruding into the actuation chamber to divide the actuation chamber into a suction chamber and a compression chamber. A discharge port, which is provided in the end plate near the vane groove, communicates with the compression chamber, and a discharge groove, which is provided in the cylinder inner wall near the vane groove, communicates the compression chamber with the discharge port, and one side end portion of the discharge groove is located in an end portion of a wall portion of the vane groove on the compression chamber side.

Abstract: Disclosed is a vane compressor in which cylinders concentrically formed at the side of a rotor are eccentrically inserted in ring-shaped spaces between cylindrical parts concentrically formed at the side of a stator. A pair of radially extending vane attachment grooves is formed in the rotor, and vanes are slidably attached in the vane attachment grooves. Compression chambers the volumes of which repeatedly increase and decrease with each rotation of the rotor are concentrically formed in multiple stages by the cylindrical parts of the stator, the cylinders of the rotor, and comb-tooth parts of the vanes. It is possible to realize a vane compressor in which compression chambers can be concentrically arranged in multiple stages in a simple structure by suppressing increase in the number of components to the minimum level.

Abstract: A rotary compressor, used e.g. in an air conditioner, includes a compressing unit having an end plate that closes an end portion of an annular cylinder. The end plate includes a groove portion accommodating a discharge valve portion having a reed valve type discharge valve and a discharge-valve limiter. The discharge valve portion is attached to the groove portion with a rivet. The groove portion has a rivet-side enlarged diameter portion formed into a semicircular step shape, and a diameter of the rivet-side enlarged diameter portion other than a bottom side thereof is larger than a diameter of the bottom side. This prevents a punch P that swages the rivet from interfering with the groove portion when attaching the discharge valve portion to the groove portion with the rivet.

Abstract: The present invention relates to a heat engine having a housing. A generally triangular shaped rotor can drive an offset crank as it eccentrically rotates within the housing. Two inlets with valves and two exhausts are provided. The volume between each face of the rotor and the housing defines three expansion chambers. Six power cycles are provided (one by each expansion chamber times two inlets) per revolution of the rotor. Each valve controls the length of time that high pressure gas is allowed to enter each expansion chamber. The valves are controlled by a processor and close when enough pressure is supplied so that the pressures inside and outside the expansion chamber are equal when the chamber is fully expanded just prior to exhaust. Gates can provide a mechanical advantage to the rotor by reducing the amount of pressure applied to the back side of the fulcrum.

Abstract: Provided is a fluid machine which can be produced to have an increased weld strength and an increased reliability, at a reduced production cost. A first and a second shells (78, 80), each having a rim and a sealing portion constituting part of the rim, are butted together with the rims (78a, 80a) held together to form a groove (82) and with the sealing portions (96, 98) in contact with each other, and joined together by a weld (84) formed in the groove over the entire length of the groove to be separated from the sealing portions by a space (100).

Abstract: A scroll pump facilitates the installation of a new tip seal between an axial end of the scroll blade of one of inner stationary and orbiting plate scrolls of the pump and the plate of the other of the inner stationary plate and orbiting plate scrolls. To this end, the orbiting plate scroll has a central portion and an outer peripheral portion extending around and seated on the central portion. The outer peripheral portion of the orbiting plate scroll is keyed to and/or fastened to the central portion such that the outer peripheral portion is not rotatable relative to the central portion and yet is axially removable from the central portion. The tip seal can be readily accessed and replaced by removing the outer peripheral portion of the orbiting scroll plate from the central portion.

Abstract: A spherical expansion compressor adapted to variable working conditions with a spherical inner chamber, comprises a rolling rotor compressor used as first-stage compression, compression working chambers, expansion working chambers, a gas tank and a pressure control circuit. The pressure control circuit is between the gas tank and a pressure-controlled inlet valve of the rolling rotor compressor, and controls the inlet valve to open/close according to pressure in the gas tank and maintains constant pressure in the tank. A working medium after first-stage compression enters the gas tank, where the pressure control circuit regulates the gas tank pressure. The working medium enters second-stage compression, and expands in the expansion-stage, forming the spherical expansion compressor adapted to variable working conditions.

Abstract: A compressor, characterized in that a steel is used as the base material for the other sliding material vane 10 and nitrided, a CrN or DLC film is formed on the surface by PVD treatment, and a Ni—Cr—Mo cast iron is used for the other corresponding sliding material piston 9. It is possible in such a configuration to suppress the temperature rise by sliding friction of the sliding materials, such as the vane tip region 10a and the peripheral region of piston 9 that are vigorously slid, relax decomposition of the refrigerant, and suppress corrosion by hydrogen fluoride generated in reaction with water and oxygen, and thus to provide a compressor higher in reliability.

Abstract: A compression device includes a plurality of compressors in a shell. Each compressor includes a rolling piston that rotates within a cylinder to compress refrigerant. At least one valve allows refrigerant to be simultaneously or successively compressed by the compressors. A first pipe transfers refrigerant into one of the compressors, and a second pipe transfers refrigerant compressed in one of the compressors to another one of the compressors when the refrigerant is successively compressed by the compression mechanisms. The first and second pipes are coupled to the cylinder of one of the compressors.

Abstract: A compressor is provided having an accumulator that may form an accumulating chamber at an internal space of a shell, thereby reducing a size of the compressor, and simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. Further, a center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration noise of the compressor caused by the accumulator. Furthermore, an oil collecting plate may be installed at an upper end of an upper bearing to supply oil between a vein and vein slot, thereby preventing compression loss. Also, an installation area of the compressor including the accumulator may be minimized to enhance design flexibility of an outdoor device employing the compressor and minimize interference with other components, thereby facilitating installation of the outdoor device.

Abstract: A compression mechanism portion housed in a closed case is provided with a partition plate located between a first cylinder and a second cylinder. The compression mechanism includes a first bearing discharge port formed to a first bearing and a first partition plate discharge port formed to the partition plate as discharge ports for discharging working fluid compressed in a first cylinder chamber, and also includes, as discharge port for discharging working fluid compressed in a second cylinder chamber, a second bearing discharge port formed to a second bearing and a second partition plate discharge port formed to the partition plate. A cross-sectional area of the first partition plate discharge port is formed to be smaller than a cross-sectional area of the first bearing discharge port, and a cross-sectional area of the second partition plate discharge port is formed to be smaller than a cross-sectional area of the second bearing discharge port.

Abstract: A compressor is provided in which a rotary member is suspended on a stationary member and rotates to compress a refrigerant. In the stationary member, top and bottom ends of a stationary shaft are fixed to improve structural stability and assembly properties. Bearing covers are provided on a contact portion of the stationary member and the rotary member, such that the rotary member may rotate when suspended on the stationary member, which stabilizes operation. In the rotary member, a vane is integrally formed with a roller and mounted on a vane mounting hole of a cylinder-type rotor. Although, the rotary member is provided on an outer circumferential surface of the stationary member, suction and discharge operations of the refrigerant are performed in an axial direction, which lowers product height. Oil stored in a hermetic container is supplied to a lubrication passage provided between the stationary member and the rotary member.

Abstract: A rotary compressor (100A) includes a closed casing (1), a compression mechanism (48), a lower end-face plate (34), and a communication hole (50). An oil reservoir (12) is formed at the bottom of the closed casing (1). The lower end-face plate (34) divides the oil reservoir (12) into a plurality of sections (12a) and (12b) in the vertical direction. The plurality of sections of the oil reservoir (12) communicate with each other through the communication hole (50). The communication hole (50) is located on the same side as a discharge port (8b) of the compression mechanism (48) with respect to a reference plane (H1).

Abstract: An expander-compressor unit (10) includes a two-stage rotary expansion mechanism (3) having a first cylinder (41) and a second cylinder (42). In the expansion mechanism (3), a suction port (71) facing a working chamber on the upstream side in the first cylinder (41) and a discharge port facing a working chamber on the downstream side in the second cylinder (42) are formed. An intermediate plate (43) is provided between the first cylinder (41) and the second cylinder (42). In the intermediate plate (43), a communication passage (43a) for allowing communication between a working chamber on the downstream side in the first cylinder (41) and a working chamber on the upstream side in the second cylinder (42) is formed. The communication passage (43a) does not communicate with the working chamber in the first cylinder (41) during the suction process, and communicates with the downstream working chamber in the first cylinder (41) at or after the end of the suction process.

Abstract: There is disclosed a rotary compressor which delays a pressure rise on a high pressure chamber side in a cylinder of a rotary compression element to decrease a high pressure load applied to a roller and a rotary shaft, thereby improving performance. In the rotary compressor including a sealed container in which an electromotive element (a driving element) and first and second rotary compression elements driven by a rotary shaft of the electromotive element are included, each of the rotary compression elements being constituted of a cylinder, a roller fitted into an eccentric portion formed on the rotary shaft to eccentrically rotate in the cylinder, and a vane which abuts on the roller to partition the inside of the cylinder into a low pressure chamber side and a high pressure chamber side, the inner diameter of a suction passage formed in each cylinder is 59% or more and 70% or less of the thickness of the cylinder.

Abstract: A split-cycle variable capacity rotary spark ignition engine system having at least a first rotary configuration (C1) including repetitively volume variable working chambers [60, 61, 62] for carrying out the combustion-expansion and exhaust phases and at least a second rotary configuration (C2) including repetitively volume variable working chambers (70, 71, 72) for carrying out the intake and compression phases of a four phase engine cycle. Dividing seal means (73, 74 of C1, 75, 76 of C2) for periodically dividing each of successive working chambers into a volume enlarging leading portion and a volume contracting trailing portion. Discharge valve means for varying compression chamber capacity through discharging fraction of trapped intake gas from compression chambers. A first phase altering arrangement is provided for varying the phase relation between the first rotary configuration (C1) and the second rotary configuration (C2).

Abstract: Method and apparatus for oil-less engine with a revolving rotor are shown. Oil-less engine allows manufacturers to build environmentally safer oil-free engines, with fewer engine parts and at reduced costs of manufacturing. In one embodiment, the present invention is a method of internal combustion in an oil-less engine casing. The method is, revolving a multi-angular rotor around a center point to sequentially combust with each of a plurality of fireheads, revolving in a manner that each side of the multi-angular rotor successively achieves a top dead center position with a respective firehead. A firehead is a combination of a sparking means, a fuel injector and an air injector.

Abstract: An enclosed compressor includes a compression element configured to compress a working fluid, a casing and a fixing member. The casing has a substantially cylindrical shell plate and houses the compression element. The fixing member is welded to the shell plate. The compression element is fixed to the fixing member by at least six fastening bolts.

Abstract: A displacement machine of spiral-type construction for a compressible medium includes a displacement body having a carrier disc and helical blades extending out from both sides of the carrier disc. The carrier disc has a hub which is supported by a hub bearing on an eccentric disc which is part of a driven drive shaft. The drive shaft is supported inside a housing by a first bearing and a second bearing. These bearings are arranged in receptacles which fully project into the feed chambers of the housing so that the bearings are positioned in close proximity to the eccentric disc.

Abstract: A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three equally spaced idlers. One idler then transmits rotation and torque into the second stage. The second orbiting scroll to has involutes upon both surfaces to engage the second fixed scroll inwardly and the first fixed scroll outwardly. The first fixed scroll has fins upon its back that extend into the atmosphere to transfer heat to air cool the invention. This pump also has a fan accelerating heat transfer. The pump operates the scrolls directly from a motor or from a motor and magnetic coupling so that the atmosphere does not infiltrate the pump.

Abstract: A rotary compressor is provided, in which an inner diameter of a connection hole connected to a vane chamber and an outer diameter of a connection tube inserted into the connection hole are designated so that the connection tube can closely be adhered to the connection hole, thereby preventing a refrigerant from being leaked out between the connection hole and the connection tube so as to allow a fast and accurate mode switching of the vane, resulting in improvement of the performance of the compressor and prevention of noise caused by vibration of the vane.

Abstract: A scroll fluid machine that suppresses fluctuations in a port aperture area during each revolution of an orbiting scroll. Suction ports for sucking in a working fluid are disposed on a second base plate to have openings in a vicinity of a winding start end portion of a second spiral tooth, and near an inward facing surface of the second spiral tooth at a position separated by an involute angle approximately 90° from the winding start end portion of the second spiral tooth. Discharge ports for discharging the working fluid are disposed on a first base plate to have openings in a vicinity of a winding start end portion of a first spiral tooth, and near an inward facing surface of the first spiral tooth at a position separated by an involute angle approximately 90° from the winding start end portion of the first spiral tooth.

Abstract: The present invention provides a 2 stage rotary compressor including a hermetic container (101), an electric motor (110) composed of an stator (111), a rotor (112) and a rotation axis (113), a low pressure compression assembly (120) including a low pressure cylinder (121), a high pressure compression (130) assembly including a high pressure cylinder (131), a middle plate (140) for separating the low pressure cylinder (121) from the high pressure cylinder (131), middle pressure communication holes (161a, 140a) formed in the low pressure cylinder (121) and the middle plate (140) to communicate with each other, and a middle pressure inflow groove (130a) formed in the high pressure cylinder (131) to communicate with the communication holes (161a, 140a) of the low pressure cylinder (121) and the middle plate (140).

Abstract: In a positive displacement machine for compressible media, having a spiral-shaped feed chamber (11) arranged in a housing (7b) between cylinder walls (14, 15), a spiral-shaped displacement body is composed of a disc (2) with spiral-shaped strips (3). The strips (3) are held eccentrically with respect to the housing, in such a way that, during operation, each point of the strip performs a movement which is limited by the peripheral walls of the feed chamber. The contour (20) of the disc is formed, in the overlapped region of the spiral at the point provided for the mutual sealing of the traversed chambers (11, 16), in the shape of the movement path. The housing edge (19) is formed, as a transition between the raised first part (17) and lowered second part (18) of the outer cylinder wall (14) of the housing, as a bulbous thickened portion. The radial extent “D” of the thickened portion is at least as great as the degree of eccentricity (“e”).

Abstract: A compressor slider has a carbon content of 2.0 wt % to 2.7 wt %, a silicon content of 1.0 wt % to 3.0 wt %, a balance of iron that includes unavoidable impurities, graphite that is smaller than the flake graphite of flake graphite cast iron, and a hardness that is greater than HRB 90 but less than HRB 100 in at least a portion of the slider.

Abstract: A compressor includes a compression mechanism having two opposed end plates, a fixed member disposed between the two end plates, a movable member disposed between the two end plates, a bypass passage, and an opener/closer. The movable member is arranged to eccentrically move about a predetermined rotational axis to compress refrigerant in a compression chamber formed between the fixed member and the movable member. The bypass passageway has an upstream end opened to the compression chamber through which refrigerant is partially ejected from the compression chamber so as to be returned to a suction side of the compression mechanism. The cross section of the upstream end of the bypass passage is preferably elongated circumferentially about the rotational axis. The compression mechanism may include a plurality of bypass passages and a plurality of openers/closers.

Abstract: A rotary compressor includes a compressor casing which includes a compression unit for sucking refrigerant gas from a low pressure side of a refrigerating cycle and ejecting the gas to a high pressure side of the refrigerating cycle, and a motor for driving the compression unit through a rotating shaft. The compressor has a gas hole formed on a rotor of the motor for causing a refrigerant gas below the motor to pass upward, and an oil separation plate having a central cylindrical portion, a curved portion continuous to the central cylindrical portion and curved in a radial direction, and an outer peripheral disk portion continuous to the curved portion and is fixed on the rotor by a rivet so that a lower end portion of the central cylindrical portion comes into close contact with the upper end of the rotor or an upper end plate of the rotor.

Abstract: A rotary-type fluid machine includes a compression mechanism having piston mechanisms arranged one on top of the other and a drive mechanism having a drive shaft that is configured and arranged to drive the piston mechanisms. Each of the two piston mechanisms includes a cylinder member with a cylinder chamber, a piston member housed eccentrically in the cylinder chamber such that the cylinder chamber is partitioned into first and second compression chambers. A phase difference of 90 degrees in volume change is made between the cylinder chambers of the two piston mechanisms. A movable one of the cylinder and piston has a first surface facing one of the first cylinder chambers and a second surface facing one of the second cylinder chambers, with a surface area of the first surface being equal to a surface area of the second surface.

Abstract: A variable capacity rotary compressor includes a rolling piston eccentrically rotated in the compression space of the cylinder assembly, and a vane coming in contact with the rolling piston. A vane restricting device restricts the vane by applying a pressure onto a side face of the vane, where a sectional area A of a passage through which the restriction pressure is applied to the side face of the vane is formed so as not to be larger than a vane area B of the vane to which the restriction pressure is applied through a passage. The passage includes a first passage for connecting an inner space of the casing to a vane slot which is provided in the cylinder assembly and has the vane slidably inserted therein, and a second passage for connecting the vane slot to an inlet which is connected to the suction chamber of the cylinder assembly.