Abstract: A rotary compressor including a cylinder to form a compression chamber, and including a vane slot including a vane guide part recessed outward from an inner surface of the compression chamber and an extended part having a width wider than the width of the vane guide part by a predetermined extension width in an outer end area of the vane guide part, a roller to eccentrically rotate in the compression chamber and to compress a medium, a vane reciprocatingly accommodated in the vane slot, and contacted to an outer surface of the roller to divide the compression chamber, and a filling member accommodated in a space of the extension width in the extended part.

Abstract: A highly reliable sliding face modification material capable of forming a stable film of molybdenum disulfide on the sliding face of a sliding member, the sliding face modification material having a molybdenum disulfide content of 95 wt % or more and an organic material content of 1500 ppm or less in weight ratio, and the sliding face modification material being projected onto the sliding face to form a coating layer.

Abstract: A front head of a cylinder and a mounting plate are tightly fixed to each other. The mounting plate is welded to a casing. The mounting plate is made of steel containing 2.0% or less of carbon therein. Furthermore, a stator core of a compressor motor is welded to the casing. A hermetic sealed compressor is configured in a high-pressure domed type. A supercritical fluid is used as an operating fluid.

Abstract: A rotary compressor includes a compression mechanism in which a piston is disposed inside a cylinder chamber of a cylinder. The cylinder and the piston eccentrically rotate relative to each other. The cylinder chamber is sectioned into a high pressure chamber and a low pressure chamber in order to prevent production of vibration and noises due to pressure pulsation caused in a suction process. A low pressure space communicating with a suction side of the compression mechanism and a high pressure space communicating with a discharge side of the compression mechanism are formed in the casing. A suction pipe communicating with the high pressure space and a discharge pipe communicating with the high pressure space are disposed in the casing.

Abstract: An improved muffler system for a compressor assembly where the muffler is disposed within the compressor housing and a peripheral edge of the muffler abuts, and expansively engages, the interior surface of the housing in an interference fit relationship. The compressor pump is attached to the muffler where the pump is substantially thermally and vibrationally isolated from the housing. The muffler, the compressor pump and the compressor housing define a series of chambers in which noise generated by the compressor pump is dissipated. The dimensions of the chambers are chosen to cause acoustical waves having specific, undesirable frequencies to cancel each other out.

Abstract: A rotary fluid device having a housing that defines a pumping chamber, a shaft disposed in the housing, and a rotor disposed in the pumping chamber and engaged with the shaft. The rotor includes a body which defines a bore that includes an oblique tapered surface. A pivot line is disposed along the tapered surface. The pivot line is a circumferential line at which the rotor pivots. A method for manufacturing a rotor includes turning an outer peripheral surface of the rotor. A bore is formed in the rotor. The bore includes an oblique tapered surface that has a pivot line disposed along the tapered surface, wherein the pivot line is a circumferential line at which the rotor pivots.

Abstract: A hermetically sealed rotary compressor 100 including an electrically-driven element 2, a rotary compressing element 4 equipped with a cylinder 41 having a compression chamber 43 and a hermetically sealed container 1 in which oil 8 is stocked, is equipped with an oil path 62 for injecting the oil 8 into the compression chamber 43 when refrigerant is sucked into the compression chamber 43, and an opening/closing valve 80 for opening/closing the oil path 62 in accordance with the discharge pressure of the rotary compressing element 4 of the pressure of the compressed refrigerant compressed by the rotary compressing element 4.

Abstract: A compression mechanism has a cylinder, a suction passage and a discharge passage. The suction passage of a cylinder is connected to a suction pipe. The discharge passage is open to an inner space of a sealed housing. A discharge gas is discharged through a discharge pipe. The cylinder is formed with a communicating passage extending from a suction passage to a suction pressure chamber to lead a suction gas in the suction passage into the suction pressure chamber and thereby allow a pressure of the suction gas in the suction passage to act on an outside surface of the cylinder.

Abstract: The invention relates to a compressor for cryogenic media comprising at least one compressor cylinder in which a compressor piston is arranged, wherein the compressor piston interacts with a crankshaft by means of a connecting rod. To solve the object of attaining a secure operation and of attaining a long service life of the compressor by means of low production efforts, it is proposed according to the invention that the compressor piston is embodied as an oscillating piston.

Abstract: A rotary fluid machine is provided with a cylinder having an annular cylinder chamber, an annular piston and a blade that form a rotation mechanism. The piston is disposed in the cylinder chamber to be eccentric to the cylinder and divides the cylinder chamber into an outer working chamber and an inner working chamber. The blade is arranged in the cylinder chamber to divide each of the working chambers into a high pressure region and a low pressure region. The cylinder and the piston make relative rotations. A width of the cylinder chamber is varied along a circumference of the cylinder chamber such that a gap between a wall surface of the cylinder and a wall surface of the piston is kept to a predetermined value during the rotations. Further, a width of the piston is varied along a circumference of the piston such that the gap between the wall surface of the cylinder and the wall surface of the piston is kept to a predetermined value during the rotations.

Abstract: A valving system for reversing flow in a compressing device. The reversible compressor includes a reversible drive motor for reversing a rotational direction of a rotor, a first and second port located in a left and right side of a stator, respectively, and a first and second manifold located on a right a left side of said reversible compressor, the first and said second manifold includes a corresponding first and second inlet valve moveable between an open and closed position. A valving system between said first and said second manifold switches one of the first and second inlet valve to an open position to open a corresponding first or the second port for directional flow corresponding to the rotational direction of the rotor. In a first embodiment the valving system is a pressure-actuated control element and in a second embodiment the valving system includes a solenoid.

Abstract: A projection of an upper bearing member is provided with a porous member, and a lower space between a rotational motor and a compression mechanism is defined into a lower compression mechanism-side space and a lower rotational motor-side space. With this structure, stirring effect of working fluid flowing in the lower compression mechanism-side space caused by rotation of the rotor is suppressed, and oil drops mixed in the working fluid are prevented from being finely divided by the stirring effect, the oil drops are allowed to fall due to the gravity in the lower compression mechanism-side space, and oil separating effect from the working fluid is enhanced.

Abstract: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.

Abstract: In a capacity variable type rotary compressor, its operation method and an operation method of an air conditioner having the same, a plurality of discharge holes are formed, and one of the discharge holes is connected to a bypass hole, which is opened and closed by a sliding valve according to a pressure difference, so as to be selectively connected to an intake hole. Accordingly, a cooling capability lowering rate is increased during capacity varying operation of the compressor, such that the air conditioner can be variously controlled, and unnecessary power consumption of the compressor and the air conditioner having the same can be reduced. Also, by using a pilot valve which is economical and reliable, back pressure of the sliding valve can be speedily and accurately switched.

Abstract: A hermetic rotary compressor operates two cylinders simultaneously in the regular operation; however it halts operating one of the cylinders when it selects an operation with a half capacity. A vane room of the halted cylinder is air-tightly sealed with respect to lubricant atmosphere in a hermetic case. An oil-supplying groove is provided to a vane groove of the halted cylinder, and lubricant is supplied to the oil-supplying groove in order to lubricate the vane.

Abstract: A rotary fluid machine includes a first rotation mechanism and a second rotation mechanism. Each of them includes a cylinder having a cylinder chamber and an annular piston which is contained in the cylinder chamber and divides the cylinder chamber into an outer working chamber and an inner working chamber. The cylinder goes rotates around the piston. The first rotation mechanism and the second rotation mechanism are arranged to be adjacent to each other with a partition plate sandwiched therebetween. The cylinder of the first rotation mechanism and the cylinder of the second rotation mechanism are arranged such that one of the cylinders is provided at one side of a partition plate and the other is provided at the other side of the partition plate. Each of the first rotation mechanism and the second rotation mechanism is provided with a compliance mechanism for reducing a gap that occurs between the cylinders in the axial direction of the drive shaft.

Abstract: A sleeve connecting a refrigerant pipe to a sealed compressor container has a reduced outer dimension and an inner step that accommodates the refrigerant pipe. An end of the refrigerant pipe abuts the inner step to accurately locate the refrigerant pipe to permit the refrigerant pipe to be secured in an desired relationship with the sleeve. The sleeve is attached to the container with increased accuracy and less chance of damage to the container through deformation during the attachment process. The sleeve and container may be composed of iron, while the refrigerant pipe may be composed of copper, so that the more rigid sleeve can accurately couple the less rigid refrigerant pipe to the container.

Abstract: A capacity varying type rotary compressor and a refrigeration system having the same. The capacity varying type rotary compressor comprises a casing containing a certain amount of oil and maintaining a discharge pressure state; a motor installed in the casing and generating a driving force; one or more cylinder assembly fixed in the casing, having a compression space for compressing a refrigerant by a rolling piston that performs an orbit motion and a vane that performs a linear motion by contacting the rolling piston, and having a vane pressure chamber formed at a rear side of the vane, for implementing a normal driving as the vane contacts the rolling piston or implementing a saving driving as the vane is separated from the rolling piston; and a mode switching unit for selectively supplying suction pressure or a discharge pressure to the vane pressure chamber of the cylinder assembly according to a driving mode.

Abstract: In a two-cylinder type hermetic rotary compressor, a first cylinder continually operates due to a spring member biasing a first vane. A pressure introducing pipe is connected to a second vane room arranged in a second cylinder. The second cylinder stops and starts operation by introducing sucking pressure or discharge pressure from the pressure introducing pipe. A discharge pressure introducing pipe that is connected to a portion of a hermetic case below the oil face of the lubricating oil is connected to the pressure introducing pipe.

Abstract: A hermetic rotary compressor operates two cylinders simultaneously in the regular operation; however it halts operating one of the cylinders when it selects an operation with a half capacity. A vane room of the halted cylinder is air-tightly sealed with respect to lubricant atmosphere in a hermetic case. An oil-supplying groove is provided to a vane groove of the halted cylinder, and lubricant is supplied to the oil-supplying groove in order to lubricate the vane.

Abstract: Disclosed herein is a capacity-changing unit of an orbiting vane compressor that is capable of performing normal operation and no-load operation in inner and outer compression chambers through simple manipulation of a rotary valve plate, thereby easily changing the capacity of the compressor according to operation modes. The capacity-changing unit comprises a rotary valve plate disposed between a cylinder and a subsidiary frame for opening or closing a communication channel connected between an inlet port of the cylinder and inner and outer outlet ports of the cylinder as an actuator is rotated in alternating directions. Consequently, the present invention has the effect of reducing power consumption and preventing reduction in service life of the parts of the orbiting vane compressor due to repetitive on/off operation of the orbiting vane compressor, and therefore, improving the performance and reliability of the orbiting vane compressor.

Abstract: Disclosed herein is a low-pressure type orbiting vane compressor that is capable of diverging low-temperature and low-pressure refrigerant gas introduced into a shell through an inlet tube to an inlet port of a cylinder and a drive unit so as to simultaneously compress the refrigerant gas and cool the drive unit. The orbiting vane compressor comprises a vertical baffle disposed in the shell while being spaced apart from the inner end of the inlet tube, and a diverging channel defined between the baffle and the inlet tube, the diverging channel having one end communicating with the inlet port of the cylinder and the other end communicating with the drive unit. Consequently, the present invention has the effect of preventing overheating of the drive unit, and therefore, improving performance and reliability of the orbiting vane compressor.

Abstract: Disclosed is a rotary compressor having two compression capacities according to the two different rotational directions of the driving shaft (300). The rotary compressor includes: a driving shaft (300) with an eccentric portion (310) on which a roller (400) rotates along an inner circumference of the cylinder (100), a vane (110) installed in the cylinder (100) to contact the roller (400) continuously, an upper (210) and one lower (220) bearing respectively disposed on top and bottom of the cylinder (100), a disc shaped valve (820) rotates between two positions and has at least one suction port (710 or 720) for selectively supplying refrigerant inside the compression chamber (100) according to the rotational direction of the driving shaft (300) and at least one discharge port (621 or 611) communicating with the compression chamber (100) for discharging the compressed refrigerant. The refrigerant is supplied through a communication hole (102) to a port (730) formed on the outer valve (810).

Abstract: A high inner pressure type multistage compression rotary compressor having a support member blocking an opening of a cylinder constituting the rotary compression element and having a bearing of a rotary shaft. The surface of the support member on a side opposite to the cylinder is depressed, and a rib is added to a part of this depressed portion. A discharge muffling chamber formed in the surface of the support member on the side opposite to the cylinder is divided into a plurality of discharge muffling chambers, and the divided discharge muffling chambers are connected to each other by a passage disposed it a blocking plate and/or the rib.

Abstract: Disclosed herein is a compression unit of an orbiting vane compressor. The compression unit comprises a circular operation space formed in a cylinder, the circular operation space having opposite ends, a circular vane disposed in the operation space for performing an orbiting movement, the circular vane having opposite ends, a linear slider disposed in the operation space for performing a linear reciprocating movement while one end of the linear slider is in contact with the end of the circular vane, and a pressurizing member disposed in the operation space adjacent to the other end of the linear slider for applying pressure to the linear slider such that the linear slider is brought into tight contact with the circular vane. Consequently, interference between the inner wall of the cylinder and the circular vane is prevented, and creation of dead volume in the operation space is prevented.

Abstract: A hermetic compressor is disclosed to reduce a production cost, for which low temperature and low pressure gas passes inside a case to reduce a pressure inside the case so that it is not necessary to increase the thickness of the case and to reinforce a strength. The hermetic compressor includes a case having a suction tube and a discharge tube; a driving unit installed at an upper side of the case and generating a driving force; and a compressing unit installed at a lower side of the case and connected to the driving unit by a rotational shaft so as to compress the low temperature and low pressure gas sucked into the case through the suction tube by a rotational force generated from the driving unit and discharge the gas through the discharge tube.

Abstract: A compressor includes a casing, a driving part adapted to be accommodated in the casing for generating a driving force, a compression part for compressing gas with the driving force from the driving part and provided with an inlet for inhaling the gas and an outlet for discharging the compressed gas, and a valve apparatus for opening and closing the outlet. The valve apparatus has a valve body accommodation part including an inner surface of a cylindrical shape for communicating with the outlet, and connected to a gas discharging path for discharging the compressed gas discharged through the outlet; and a valve body accommodated in the valve body accommodation part and curved to close the outlet elastically and to open the outlet with the compressed gas of the compression part.

Abstract: A variable capacity rotary compressor includes a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit placed in the first and second compression chambers and operated to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft which drives the compressing unit. The compressor further includes a suction path controller having a hollow body and a valve unit, and a pressure controller. The hollow body has an inlet connected to a refrigerant inlet pipe, and first and second outlets formed on the hollow body at opposite ends of the hollow body to be spaced apart from the inlet of the hollow body. The valve unit is installed in the hollow body to axially reciprocate in the hollow body to change a refrigerant suction path by a pressure difference between the first and second outlets of the hollow body.

Abstract: An oil supply hole connecting an oil reservoir to a suction port formed in a lower supporting member of a two-stage rotary compressor is disclosed. The suction port is provided in the lower supporting member attached to the lower side of a high stage side rotary compressing element, and a necessary amount of oil is supplied into return refrigerant gas sucked into the high stage side rotary compressing element through this oil supply hole. Thus an outer circumferential surface of a roller, which eccentrically rotates in a cylinder, is lubricated to protect it from wear.

Abstract: A vane of a first cylinder is compressed and urged by a spring member. A vane of a second cylinder is compressed and urged corresponding to a differential pressure between an intra-casing pressure guided into a vane chamber and a suction pressure or discharge pressure guided to the cylinder chamber. A pressure shift mechanism which guides the suction pressure or discharge pressure has a branch pipe having a one end connected to a high pressure side of the refrigeration cycle, an other end connected to a suction pipe, and a first on-off valve in a midway portion, and a second on-off valve or a check valve which is provided in the suction pipe on a side upstream of a connection portion of the branch pipe and on a side downstream of an oil returning opening in an accumulator.

Abstract: A variable capacity rotary compressor to reduce an electric power loss thereof and includes a drive unit to generate a rotating force, a rotating shaft connected to the drive unit to rotate thereby, and a compressing cylinder through which the rotating shaft passes. A compressing chamber is defined in the compressing cylinder to compress refrigerant therein, with a first refrigerant inlet port provided at the compressing chamber to introduce the refrigerant into the compressing chamber. A capacity control unit controls an operation of the rotary compressor, so that the rotary compressor performs one of a normal-mode operation wherein the first refrigerant inlet port is maintained at an open state thereof, and the variable capacity-mode operation wherein the first refrigerant inlet port is periodically opened and closed.

Abstract: A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second rotary compression elements are driven by the electric motor element. The refrigerant compressed and discharged by the first rotary compression element is compressed by absorbing into the second rotary compression element, and is discharged to the gas cooler.

Abstract: A variable capacity rotary compressor allowing oil to be smoothly supplied to compressing elements, regardless of a rotating direction of a rotating shaft. The variable capacity rotary compressor includes a rotating shaft which is rotated in a forward direction or a reverse direction to vary a compression capacity of the compressor. A shaft bearing supports the rotating shaft. An oil guide groove is spirally formed on at least one of the shaft bearing and the rotating shaft to supply oil. An oil storing chamber is defined at an upper portion of the shaft bearing to communicate with the oil guide groove, and stores a predetermined amount of oil therein.

Abstract: A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, and thereby prevent noise from being generated and increase durability. The variable capacity rotary compressor includes a housing to define first and second compression chambers having different capacities therein. First and second eccentric cams are mounted to a rotating shaft to be placed in the first and second compression chambers, respectively. First and second eccentric bushes are rotatably fitted over the first and second eccentric cams, respectively. First and second rollers are rotatably fitted over the first and second eccentric bushes, respectively. First and second vanes partition the first and second compression chambers, respectively.

Abstract: A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, thus preventing noise from being generated and increasing durability. The compressor includes a housing to define two compression chambers having different capacities therein. A rotating shaft is rotated in the compression chambers. Two eccentric cams are mounted to the rotating shaft. Two eccentric bushes are rotatably fitted over the eccentric cams. Two rollers are rotatably fitted over the eccentric bushes. Two vanes are installed in the compression chambers to be reciprocated in a radial direction of the rotating shaft. A cylindrical connecting part integrally connects the eccentric bushes to each other, with a locking slot being provided around the connecting part.

Abstract: A refrigerant cycling device is provided, wherein a compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container. The first and the second rotary compression elements are driven by the electric motor element. The refrigerant compressed and discharged by the first rotary compression element is compressed by absorbing into the second rotary compression element, and is discharged to the gas cooler.

Abstract: A vane supporting apparatus for a hermetic compressor elastically supports vanes contacting to both cam faces of a dividing plate with thin torsion coil springs, and forms curved surface portions on upper ends of the vanes where the torsion coil springs are contacted, and thereby, height of the supporting apparatus supporting the respective vanes is reduced to miniaturize the compressor, and also, to prevent contacted portions between the vanes and the torsion coil springs from being worn away.

Abstract: A horizontal rotary compressor is configured such that an electrically powered compressor body is accommodated in a horizontally long hermetic receptacle in which a lubricating oil is accumulatively preserved, an interior of the hermetic receptacle is partitioned by a partition member into an oil storage portion space in which the compressor mechanism portion is positioned and an electric motor side space in which the electric motor portion is positioned, an oil communication portion is provided below the partition member, a gas communication opening is provided in an upper portion of the partition member, and an oil feed passageway is formed of a center opening, an oil guide opening, and oil suction tubing along the rotation axis.

Abstract: The outer peripheral surface of a swing piston is formed in a non-circular form. The inner peripheral surface of a cylinder chamber is formed on a basis of an envelope curve of the outer peripheral surface of the swing piston obtained at the time of its swing. The outer peripheral surface of the swing piston and the inner peripheral surface of the cylinder chamber are formed in, e.g., an ovoid shape so that as compared to a rotary compressor in which such inner and outer peripheral surfaces are formed in a circular form, a shorter compression cycle and a longer discharge cycle is obtained during movement of the swing piston. As a result, an overcompression loss when a refrigerant is discharged in a swing compressor is reduced.

Abstract: A variable capacity rotary compressor includes a housing defining a cylindrical compression chamber therein and having an inlet port and an outlet port communicating with the compression chamber. A rotating shaft is provided with an eccentric part to rotate in the compression chamber. A ring piston is rotatably fitted over the eccentric part such that an outer surface of the ring piston is in contact with an inner surface of the compression chamber. A vane is installed in the housing so as to be in contact with the outer surface of the ring piston and radially reciprocates, and partitions the compression chamber into an intake part and a discharging part. A re-expansion space communicates with the compression chamber, and receives refrigerant therein. A control unit opens or closes an inlet of the re-expansion space to vary a capacity of the rotary compressor.

Abstract: A hermetic two stage rotary compressor having a housing with a stationary shaft fixedly mounted in the housing. A motor having a rotor and a stator is mounted in the housing with the rotor being rotatably mounted on the shaft. A pair of compression mechanisms are rotatably mounted on the shaft with one compression mechanism being located adjacent a first end of the rotor, and one compression mechanism being located adjacent a second end of the rotor. The compression mechanisms are operatively associated with the rotor such that rotation of the rotor drives the compression mechanisms. A fluid flow path is defined in the compressor including a plurality of longitudinal bores formed in the stationary shaft. A mounting assembly is attached to the housing so as to mount the compressor in either a substantially horizontal or vertical orientation. The pump is positioned so as to be at least partially immersed in an oil sump in the housing when the compressor in either orientation.

Abstract: A compressor is provided which minimizes impact noise and abrasion between a Z-plate of the compressor and vanes formed in the compressor. Ends of the vanes formed in the compressor contact sides of the Z-plate, and the motion and surface configuration of the Z-plate cause the vanes to move reciprocally and to section compression spaces within the compressor into a suction area and a compression area. Due to the curvature of the surfaces of the Z-plate, the vanes remain in constant contact with the surface of the Z-plate, which allows for smooth transition phases and a subsequent reduction in impact noise and abrasion between the vanes and the Z-plate.

Abstract: A compressor comprising a hermetic casing, a cylinder assembly disposed in the casing, a Z-plate disposed in the cylinder assembly for dividing an inner space of the cylinder assembly into a plurality of compression spaces, and sucking, compressing and discharging a fluid while being rotated by a driving unit, and vanes being contacted with both sides of the Z-plate to make a reciprocal movement, wherein the cylinder assembly includes a vane slot for inserting the vane, said vane slot having an opened portion opened towards an outer circumference of the cylinder assembly, thereby facilitating a processing of the vane slot, enhancing productivity of the cylinder assembly and reducing a production cost.

Abstract: A twin cylinder rotary compressor including first and second cylinders; a crankshaft having first and second eccentrics mounted thereon, the first eccentric disposed within the first cylinder, the second eccentric disposed within the second cylinder; and a separator plate disposed between the first and second cylinders and having a first piece and a complementary second piece. Each of the first and second pieces includes an interior surface defining a semi-circular recess. The interior surface and the semi-circular recess of the second piece is complementary to the interior surface and the semicircular recess of the first piece, respectively, such that the semi-circular recesses combine to form a circular bore, which closely captures a portion of the crankshaft located between the first and second eccentrics.

Abstract: A variable capacity rotary compressor includes a housing defining a cylindrical compression chamber therein and having an inlet port and an outlet port communicating with the compression chamber. A rotating shaft is provided with an eccentric part to rotate in the compression chamber. A ring piston is rotatably fitted over the eccentric part such that an outer surface of the ring piston is in contact with an inner surface of the compression chamber. A vane is installed in the housing so as to be in contact with the outer surface of the ring piston and radially reciprocates, and partitions the compression chamber into an intake part and a discharging part. A re-expansion space communicates with the compression chamber, and receives refrigerant therein. A control unit opens or closes an inlet of the re-expansion space to vary a capacity of the rotary compressor.

Abstract: A compressor assembly having a drive shaft supported by a main bearing and an outboard bearing located on opposite axial ends of a cylinder block. The main bearing has a bearing support formed therein in which first and second apertures are defined. The diameter of the first aperture is less than the diameter of the second aperture. The shaft extends through the first and second apertures with the diameter of the drive shaft having an outer diameter which is no greater than the diameter of the first aperture. A sleeve is mounted on the drive shaft and is at least partially disposed within the second aperture. A bearing is located in the second aperture and engages the sleeve and the main bearing to rotationally support the drive shaft. The sleeve can have a thickness which allows the bearing to be of a standard size rather than a custom size.

Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.

Abstract: A variable capacity rotary compressor includes a housing having a cylindrical compressing chamber defined therein, a rotating shaft having an eccentric body part which rotates in the compressing chamber, a ring piston fitted over the eccentric body part of the rotating shaft so as to have the ring piston rotate while being in contact with an inner surface of the compressing chamber, a vane mounted in the housing so as to have the vane advance or retract in a radial direction of the compressing chamber in accordance with a rotation of the ring piston, and a control unit which is connected to the vane and moves in opposite directions in response to pressures of a refrigerant inlet and a refrigerant outlet of the compressor, so as to control a moving range of the vane. Accordingly, a simpler construction of the compressor is achieved and a refrigerant compressing capacity is easily controlled.

Abstract: A hermetic compressor assembly including a compressor housing, a compression mechanism disposed in the housing, a motor disposed in the housing; and a crankshaft operatively coupling the compression mechanism and the motor and having an axis of rotation. The crankshaft includes a cylindrical eccentric and a counter eccentric lobe. The cylindrical eccentric has a central axis, defines a circular axial profile, and is located on one radial side of the axis of rotation. The counter eccentric lobe is integrally formed with the crankshaft on the opposite side of the crankshaft from the eccentric, is axially adjacent the eccentric, and is located within the circular axial profile.

Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.