Abstract: A scroll compressor comprising: a vessel; a compressing mechanism provided within said vessel, the compressing mechanism comprising an orbiting scroll and a non-orbiting scroll each having a spiral wrap formed in a base plate and an Oldham ring for preventing the orbiting scroll from rotating around its axis; an oil reservoir provided within a vessel; a crankshaft for transmitting a power for compressing a working fluid; and a frame on which a main bearing for supporting the crankshaft is provided, wherein the crankshaft is provided with oil supply passages for communicating a vicinity of an orbiting bearing and a vicinity of the main bearing, and openings of the oil supply passages in the vicinity of the orbiting bearing and in the vicinity of the main bearing are positioned so that a pressure of an oil film in the orbiting bearing opening generated during an operation of the compressor is higher than a pressure of an oil film in the-main bearing opening generated during an operation of the compressor.

Abstract: A scroll compressor using helium gas as working gas, has a fixed scroll and an orbiting scroll, engaged with each other, each having a scroll tooth profile shape of a set volume ratio of a scroll wrap portion of 1.8 to 2.3.

Abstract: A scroll compressor having a cylindric hermetically closed shell, a suction chamber within the shell, a scroll mechanism in the shell, lubrication mist generating elements, a suction gas inlet opening radially into the suction chamber and a deflector plate in overlying relationship with the suction gas inlet and cooperating with the shell to delimit a duct having at least an upper opening feeding suction gas to the scroll mechanism. To uniformly laden the suction chamber with sufficient oil, the upper opening is shaped to deflect suction gas into a region within the suction chamber where an oil mist is generated by the mist generating elements during operation.

Abstract: A fluid machinery is provided which comprises a stationary spiral having an inner engaging surface, and a moving spiral having an outer engaging surface which is engaged with the inner engaging surface and is rotated upon an axis line X relatively to the stationary spiral. A working chamber which rises spirally from an outer periphery to a center portion with a reduction in volume can be formed by engaging the outer engaging surface with the inner engaging surface, and the moving spiral can be pushed along the axis line X by use of gas pressure, etc.

Abstract: An improved method of providing lubricant to a drive flat interface between the eccentric pin and the slider block in a scroll compressor includes a notch for delivering the lubricant into the slider block bore. The notch preferably extends at a remote end of the slider block from the orbiting scroll. The notch communicates lubricant from a lubricant reservoir formed between a crankcase and the orbiting scroll boss. Further, the drive flat on the eccentric pin is preferably provided with a chamfer such that lubricant exiting the notch collects in a reservoir. The chamfer ensures that lubricant will be driven along the interface surface by ensuring that centrifugal forces will drive the lubricant only in one direction along the interface surface. In an alternative embodiment, the eccentric pin is simply constructed to provide this same feature.

Abstract: Scroll compressor may include, for example, a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft, a bush coupled to the outer surface of the crank shaft and a movable scroll coupled to the crank shaft. The movable scroll is preferably disposed adjacent to the stantionary scroll. A boss may be coupled to the movable scroll and the boss preferably protrudes from the movable scroll at the opposite side of the stationary scroll. A seal is preferably disposed in a clerance defined between the bush and the boss. A compression chamber is defined by a space between the stationary scroll and the movable scroll. Fluid is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. A discharge port is preferably defined within the movable scroll and is adapted to discharge compressed fluid to a side that is opposite of the stationary scroll.

Abstract: An oil spout is drilled in the crankcase of a scroll compressor between the outer seal and the coupling. The oil spout intersects the oil return chamber to redirect a portion of the oil exiting the oil return passage to the lower surface of the orbiting scroll between the outer seal and the coupling. It is preferred that the oil spout be substantially perpendicular to and smaller in diameter than the oil return passage. The oil spout provides a continual flow of additional lubrication to the outer seal and the coupling, preventing excessive wear of the outer seal and improving overall seal reliability.

Abstract: An improved bearing for a sealed compressor incorporates a bearing mount mounted radially outwardly of the bearing. Oil supply passages extend through the bearing mount to supply lubricant to the bearing. A magnet is positioned outwardly of the bearing mount, and will collect magnetic debris within the lubricant. The positioning of the magnet adjacent to the oil supply passages provides adequate removal of the debris in an efficient way.

Abstract: An oil storage area (45a) is defined on the bottom of a motor chamber (45) of a scroll compressor (1). An oil transfer route (4a) is defined in the portion of a center housing (4) that corresponds to the storage area (45a). Lubricating oil L is separated from the discharged, compressed refrigerant by an oil separator (80) and the lubricating oil L is supplied to the backside of a movable scroll (20) due to a pressure differential within the compress (1). After lubricating a bearing (10), the lubricating oil L is temporarily stored in the storage area (45a) and then is transferred due to a pressure differential to the suction-side of a compression mechanism (21) via the oil transfer route (4a). The lubricating oil L is then transferred to the oil separator (80) together with the compressed refrigerant that is discharged from a compression chamber (32) of the compression mechanism (21).

Abstract: A scroll-type compressor having a stationary scroll and a movable scroll is provided. A compression chamber is defined between a stationary scroll and a movable scroll. A refrigerant introducing passage formed in the movable scroll for introducing a refrigerant from the compression chamber to a driving mechanism. The compressed refrigerant including a lubricant introduced through the passage is affective to lubricate the driving mechanism. The compressor may also include a sump to collect the lubricant leaving the driving mechanism. Collected lubricant is reintroduced into the compression region via a suction region of the compressor.

Abstract: An oil storage area (45a) is defined on the bottom of a motor chamber (45) of a scroll compressor (1). An oil transfer route (4a) is defined in the portion of a center housing (4) that corresponds to the storage area (45a). Lubricating oil L is separated from the discharged, compressed refrigerant by an oil separator (80) and the lubricating oil L is supplied to the rear side of a movable scroll (20) due to a pressure differential within the compressor (1). After lubricating slide contact portions of scroll walls (28, 30) of the fixed and movable scrolls (2, 20), the lubricating oil L is temporarily stored in the storage area (45a) and then is transferred due to a refrigerant pressure differential to the suction-side of a compression mechanism (21) via the oil transfer route (4a). The lubricating oil L is then transferred to the oil separator (80) together with the compressed refrigerant that is discharged from a compression chamber (32) of the compression mechanism (21).

Abstract: An oil spout is drilled in the crankcase of a scroll compressor between the outer seal and the coupling. The oil spout intersects the oil return chamber to redirect a portion of the oil exiting the oil return passage to the lower surface of the orbiting scroll between the outer seal and the coupling. It is preferred that the oil spout be substantially perpendicular to and smaller in diameter than the oil return passage. The oil spout provides a continual flow of additional lubrication to the outer seal and the coupling, preventing excessive wear of the outer seal and improving overall seal reliability.

Abstract: A scroll-type compressor has a piston valve mechanism for controlling the feeding of lubricating oil to slidable parts of the compressor. The piston valve mechanism includes a cylinder bore that connects a medium pressure chamber and a low pressure chamber, and a piston valve and a spring accommodated with the cylinder bore. The spring resiliently biases the piston valve toward the medium pressure chamber. The piston valve is driven by a pressure difference between the medium pressure chamber and the low pressure chamber, and by the spring. In one embodiment, an inwardly stepped, narrowed portion formed in the cylinder bore engages the piston valve to prevent further compression of the spring.

Abstract: An improved slider block for a scroll compressor has a bore including two spaced circular portions centered on a common axis. A recess is formed into one of the curved portions to provide additional clearance for movement of an eccentric pin. The recess allows the eccentric pin to move within the bore, as the relative position of the slider block and the eccentric pin move and change during operation of the scroll compressor.

Abstract: A scroll compressor includes an oil supply cross-hole extending radially outwardly to the outer peripheral surface of the base of the orbiting scroll. The cross-hole supplies lubricant against the crankcase towers such that lubricant is supplied to both the Oldham coupling and the seals for the back pressure chamber. The cross-hole is preferably positioned to be between 80° and 90° downstream from the beginning of the orbiting scroll wrap. In this position, adequate oil will be supplied to lubricate the Oldham coupling and the seal, while at the same time, it is unlikely that an undue amount of lubricant will be allowed into the scroll compressor chambers.

Abstract: A horizontal scroll-type compressor is provided with an oil injection fitting that extends through the compressor shell and communicates lubricating oil to a lubrication passage in the crankshaft for providing lubricant to the compressor and other components. The oil injection fitting is supplied with lubricant from an externally disposed.

Abstract: A horizontal scroll-type compressor is provided with an oil injection fitting that extends through the compressor shell and communicates lubricating oil to a lubrication passage in the crankshaft for providing lubricant to the compressor and other components. The oil injection fitting is supplied with lubricant from an externally disposed source.

Abstract: An improved slider block for a scroll compressor has a bore including two spaced circular portions centered on a common axis. A recess is formed into one of the curved portions to provide additional clearance for movement of an eccentric pin. The recess allows the eccentric pin to move within the bore, as the relative position of the slider block and the eccentric pin move and change during operation of the scroll compressor.

Abstract: A scroll type compressor comprises a housing, a fixed scroll member fixed to the housing, a movable scroll member accommodated in the housing, a compression region defined with the fixed scroll member, a discharge port discharging gas from the compression region to a high pressure region, a first seal separating a predetermined region from a low pressure region adjacent to the periphery of the movable scroll member, an oil sump in the housing communicating with the high pressure region, and a passage in the housing extending from said oil sump to said predetermined region and permitting lubricating oil to supply the first seal due to the pressure difference between said predetermined region and the high pressure region. The gas is compressed in the compression region by orbiting the movable scroll member relative to the fixed scroll member.

Abstract: An oil passage for scroll compressor comprises a plurality of slanting gutters on top surface of the main bearing frame of the scroll compressor. The main bearing frame has a groove and an annular ring formed on topside thereof. The groove is communicated with the slanting gutters and the slanting gutters are slantingly intersected with the annular ring. The oil flows from the groove into the gutter, and then flows to the annular ring or topside of the main bearing frame to provide lubrication. The crumbs or crud are also flow out of the topside of the main bearing frame through the gutter.

Abstract: A scroll compressor includes an oil supply cross-hole extending radially outwardly to the outer peripheral surface of the base of the orbiting scroll. The cross-hole supplies lubricant against the crankcase towers such that lubricant is supplied to both the Oldham coupling and the seals for the back pressure chamber. The cross-hole is preferably positioned to be between 80° and 90° downstream from the beginning of the orbiting scroll wrap. In this position, adequate oil will be supplied to lubricate the Oldham coupling and the seal, while at the same time, it is unlikely that an undue amount of lubricant will be allowed into the scroll compressor chambers.

Abstract: A porous bronze 1b and a resin 1c impregnated in pores of the porous bronze 1b formed on a backing metal 1a constitute a bearing 1. At a surface to be brought into contact with a crank shaft 5, porous bronze 1b and resin 1c are sparsely exposed. Ratio of area of exposure of porous bronze 1b at the contact surface 1d is at least 5% and at most 60%. Thus a bearing for a refrigerating compressor having high seizure resistance at the time of boundary lubrication and having small amount of wear caused by sliding as well as a refrigerating compressor employing the same can be obtained.

Abstract: An oil passage for scroll compressor comprises a plurality of slanting gutters on top surface of the main bearing frame of the scroll compressor. The main bearing frame has a groove and an annular ring formed on topside thereof. The groove is communicated with the slanting gutters and the slanting gutters are slantingly intersected with the annular ring. The oil flows from the groove into the gutter, and then flows to the annular ring or topside of the main bearing frame to provide lubrication. The crumbs or crud also flow out of the topside of the main bearing frame through the gutter.

Abstract: In order to improve a compressor comprising a scroll compressor with a first compressor member and a second compressor member, a drive with a drive motor and an entraining unit which has an entraining member moving on an entraining path and an entraining member receiving means arranged on the second compressor member, wherein the compressor member receiving means is movable in a radial direction in relation to the central axis with a radial degree of freedom in relation to the entraining member, in such a manner that this can be produced as simply as possible and operates as reliably as possible it is suggested that the entraining member have an entraining member surface curved convexly in a direction transverse to the central axis in a direction of rotation, that the entraining member receiving means be non-rotatably arranged in relation to the second compressor member and have an entraining surface which surrounds the entraining member in a ring shape and on which the entraining member surface bears by alwa

Abstract: A scroll compressor has a reduced height by having its suction tube aligned with its motor stator windings. The oil is returned from the scroll compressor to a compressor sump by confining the oil to flow through any of several structures such that it is isolated from refrigerant passing into a suction chamber through the suction tube. In this way, the oil which has been typically returned between the stator and the inner wall of the housing does not communicate with the refrigerant which is entering the housing. While the invention is shown in scroll compressor, it has benefits in other type compressors.

Abstract: A scroll compressor using helium gas as working gas, has a fixed scroll and an orbiting scroll, engaged with each other, each having a scroll tooth profile shape of a set volume ratio of a scroll wrap portion of 1.8 to 2.3.

Abstract: A scroll compressor has a unique oil supply port for supplying lubricant to both the seals and the Oldham coupling. The oil supply port is positioned at a location such that it will not likely result in undue amounts of lubricant being entrained into the refrigerant leading into the compression chambers. The present invention is thus an improvement over the prior art.

Abstract: The present invention provides a scroll-type compressor that can supply sufficient lubricating oil without the occurrence of seizure of bearing for an orbiting scroll. In this scroll-type compressor, an annular boss 23 extends downward from the orbiting scroll, and an eccentric pin 53 of a rotating shaft 5 fits into the boss 23 via a bearing 73 and an eccentric bush 54. A gap 58 is provided between the eccentric pin 53 and the eccentric bush 54, and an oil supply path 57 is provided between the eccentric bush 54 and the bearing 73. The lubricating oil flows out of an oil supply hole 52 formed in a rotating shaft 5 and the eccentric pin 53, being supplied to the bearing 73, etc. via the oil supply path 57. In order to sufficiently supply the lubricating oil to the oil supply path 57, a portion 54f extending in an arcuate shape from the upper end face of the eccentric bush 54 forms a protrusion extending upward from the other flat portion 54d.

Abstract: Oil retention recesses are formed in an outer periphery of the slider block of a scroll compressor. The recesses insure that a quantity of oil is captured and maintained during operation and after shutdown of the scroll compressor. If the scroll compressor is operated or started back up during a “starved” lubricant condition, the captured oil insures the scroll compressor can operate without damage for a period of time such that lubricant can be returned to the sealed compressor.

Abstract: A scroll compressor includes a fluid injection system. The fluid injection system includes a fluid passage which extends from a position outside of the shell of the compressor to the fluid pockets created by the wraps of the scroll members. The fluid passage extends through the orbiting scroll member. The fluid injection system can be used to inject gaseous or liquid refrigerant, lubricant or the fluid injection system can be used to vent the moving pocket to the suction area of the compressor for capacity modulation.

Abstract: A rotating type machine including a first moving member having a first surface and a second member having a second surface slidably interfacing with the first surface. The first and second surfaces have relative movement therebetween, and one of the first and second members is supported by the other member through the interface of their respective first and second surfaces. At least one of the first and second surfaces is provided with at least one recess therein. A liquid lubricant is provided between the first and second surfaces, and the lubricant is received in the recess. Relative to the surface in which the recess is provided, the recess has a maximum depth which ranges between about 0.00125 and 0.0060 inches, and a surface area which ranges between about 1.767×10−4 and 1.

Abstract: A helical-blade fluid machine maintains a low-pressure atmosphere in a closed casing (1) and secures a proper lubrication state for a compression mechanism (9). The fluid machine has a drive mechanism (7) that is installed at an upper or lower part of the casing and consists of a stator (11) and a rotor (15). The compression mechanism is installed at the other part of the casing. The compression mechanism has a cylinder (23) and a roller (25), which is swayed with respect to the cylinder by the drive mechanism. A helical blade (39) having unequal pitches is arranged on the roller, to define compression chambers (41). This arrangement lowers the head of lubricant. An intake pipe (5) feeds gas into the casing so that a low-pressure atmosphere fills the casing.

Abstract: A scroll compressor having a simple structure is disclosed, which effectively decreases the thrust load imposed on the revolving scroll without degrading the compression efficiency. The scroll compressor includes a casing; a fixed scroll provided in the housing and comprising an end plate and a spiral protrusion built on one face of the end plate; and a revolving scroll provided in the casing and comprising an end plate and a spiral protrusion built on one face of the end plate, wherein the spiral protrusions of each scroll are engaged with each other so as to form a spiral compression chamber.

Abstract: A scroll compressor having a cylindric hermetically closed shell, a suction chamber within the shell, a scroll mechanism in the shell, lubrication mist generating elements, a suction gas inlet opening radially into the suction chamber and a deflector plate in overlying relationship with the suction gas inlet and cooperating with the shell to delimit a duct having at least an upper opening feeding suction gas to the scroll mechanism. To uniformly laden the suction chamber with sufficient oil, the upper opening is shaped to deflect suction gas into a region within the suction chamber where an oil mist is generated by the mist generating elements during operation.

Abstract: A scroll-type fluid displacement apparatus includes an orbiting and fixed scroll members. The orbiting scroll member has a first end plate and a first spiral element extending from one side of the first end plate and the fixed scroll member has a second end plate and second spiral element extending from one side of the second end plate. A driving mechanism includes a drive shaft rotatably supported by the housing to effect the orbital motion of the orbiting scroll member by the rotation of the drive shaft to thereby change the volume of the fluid pockets. At least one of second side of the first end plate of the orbiting scroll member and the second end plate of the fixed scroll member has a recess portion having a plate thickness that is thinner than the rest of the respective end plate. As a result, the stress concentration of the orbiting scroll member and the fixed scroll member may be reduced, and the strength of the central part of end plates and spiral members may be increased.

Abstract: A crankshaft assembly for a scroll compressor. The scroll compressor includes intermeshed and nested stationary and orbiting scroll elements which define at least one spiraling compression pocket therebetween and an orbital drive mechanism for driving the central axis of the orbiting scroll element about the central axis of the stationary scroll element while maintaining the orbiting scroll element substantially non-rotational with respect to the stationary scroll element. The crankshaft assembly of the orbital drive mechanism includes a crankshaft member having an elongated shaft portion for rotation about a central axis of rotation and an orbiting rotational bearing affixed to a first distal end of the crankshaft member. The center of rotation of the orbiting rotational bearing is radially offset with respect to the central axis of rotation of the crankshaft member and is adapted to accept and rotationally engage a hub portion projecting from the orbiting scroll element.

Abstract: The oil passage for lubricating a seal means, which separates a high discharge pressure area inside a compressor and a low pressure area inside the compressor with a surface of a rotating member, can be eliminated. A lip seal 37, which is interposed between a center housing 12 and a circumferential surface of a rotating shaft 14, is prevented from being withdrawn from an insertion hole 121 by a circlip 38. A support portion 122, which forms a part of the insertion hole 121 and supports the lip seal 37, extends out into a motor housing 13. An outlet port 324 of a discharge passage 32 is directed to the top portion of the support portion 122 and the circlip 38.

Abstract: A highly reliable scroll compressor adapted to make the amount of a refrigerant taken in through a first suction inlet of a scroll compression element as equal as possible to that taken in through a second suction inlet of the scroll compression element so as to improve the intake efficiency, thereby suppressing pulsation and noise. If the sectional area of the inlet of a refrigerant passage through which a refrigerant taken in flows from an end of a swivel lap via the outer periphery thereof to the second suction inlet is denoted as A1, the sectional area of the inlet of the first suction inlet is denoted as A2, and the sectional area of the inlet of a communication groove is denoted as A3 when the gap between a stationary lap and the swivel lap of the scroll compression element reaches its maximum, then A1, A2, and A3 stay within a range defined by 1.5≦A2/(A1+A3)≦2.5.

Abstract: A scroll-type compressor having a fixed scroll and a movable scroll. The fixed scroll includes a fixed base plate and a fixed volute wall extending from the fixed base plate. The movable scroll includes a movable base plate and a movable volute wall extending from the movable base plate. The movable volute wall has a distal end surface that faces the fixed base plate. A passage is formed through the movable volute wall and the movable base plate from the distal end surface. The passage reduces the area of the distal end surface of the movable volute wall, on which pressure is applied. This reduces the thrust load applied to the movable scroll and makes the compressor more reliable.

Abstract: A horizontal open drive scroll machine has a lubrication removal system located with the suction inlet of the scroll machine's outer housing. The lubrication removal system includes a funnel which directs the incoming working fluid to a position radially inward from the suction inlet defined by the scrolls. A fine mesh screen is located within the suction inlet of the housing to further aid in the removal of the lubricant from the working fluid being returned to the suction pressure chamber of the scroll machine.

Abstract: A lubrication apparatus for an anti-rotation assembly of an oiless rotary scroll compressor is disclosed. The scroll compressor includes a stationary scroll element and an orbiting scroll element which orbits about the stationary scroll element in a non-rotational fashion. At least one anti-rotation assembly is provided for preventing relative rotation between the orbiting and stationary scroll elements. The anti-rotation assembly, which includes a first rotational bearing component mounted on the interior of the housing, a second rotational bearing component mounted on the orbiting scroll element and an offset crank member interconnecting the first and second rotational bearing components, is lubricated via a lubrication channel. The lubrication channel extends from a lubrication port disposed on the exterior of the housing, through the first rotational bearing component, thereafter through a channel provided in the offset crank member, thus allowing the lubricating agent (e.g.

Abstract: A number of improvements increase the flow of lubricant within a scroll compressor. A centrifugal oil separator is mounted on the discharge port to remove oil from the refrigerant. The oil is returned through a leak path such that the oil can easily return back to a suction pressure chamber. The leak path is preferably upstream of a check valve. Thus, at shutdown, the leak path will not allow upstream components to also equalize in pressure with the suction pressure chamber of the compressor. Further, a number of embodiments include ways of resisting flow of refrigerant through the leak path, while still allowing oil flow. A number of valve elements are described which perform this function. Alternatively, labyrinth flow paths, or positioning of the return paths such that it will be closed when the compressor is shut down are disclosed.

Abstract: Counterweight size is reduced by removing material from an electric motor rotor for a machine, such as a compressor. The material is removed asymmetrically with respect to shaft centerline to provide maximum benefit. Counterweight size reduction results in decrease of compressor dimensional envelope and weight.

Abstract: An axial load resistant anti-rotation bearing for a rotary scroll compressor is disclosed. The rotary scroll compressor includes stationary and orbiting scroll elements and a drive mechanism for driving the orbiting scroll element in an orbit about the stationary scroll element. The stationary and orbiting scroll elements are intermeshed and nested to form at least one spiraling compression pocket therebetween. The at least one compression pocket generates forces which tend to force the stationary and orbiting scroll elements apart in a direction parallel to their central axes. The axial load resistant anti-rotation bearing disclosed resists such axial separating forces and employs two rotational bearing components, a first rotational bearing component mounted on the interior of the compressor housing and a second rotational bearing component mounted on the orbiting scroll element.

Abstract: A scroll compressor comprising: a vessel; a compressing mechanism provided within said vessel, the compressing mechanism comprising an orbiting scroll and a non-orbiting scroll each having a spiral wrap formed in a base plate and an Oldham ring for preventing the orbiting scroll from rotating around its axis; an oil reservoir provided within a vessel; a crankshaft for transmitting a power for compressing a working fluid; and a frame on which a main bearing for supporting the crankshaft is provided, wherein the crankshaft is provided with oil supply passages for communicating a vicinity of an orbiting bearing and a vicinity of the main bearing, and openings of the oil supply passages in the vicinity of the orbiting bearing and in the vicinity of the main bearing are positioned so that a pressure of an oil film in the orbiting bearing opening generated during an operation of the compressor is higher than a pressure of an oil film in the main bearing opening generated during an operation of the compressor.

Abstract: Scroll compressors having a non-orbiting scroll the type that moves axially for a limited distance are provided with an economizer fluid tube. The economizer tube is received within an opening in the non-orbiting scroll such that the non-orbiting scroll can move relative to the tube. This is an improvement over the prior art, and provides a more secure and simple connection.

Abstract: A scroll compressor is positioned in a housing having an end cap defining an oil sump. A shaft extends towards the oil sump and has an oil pick-up tube. A magnet is positioned on the end cap through a number of embodiments which properly position the magnet adjacent to the oil pick-up tube. In one embodiment a protrusion extends upwardly from the end cap and into an inner periphery of the magnet to position the magnet.

Abstract: A scroll compressor is disclosed. In the disclosed scroll compressor, an oil discharge port is formed at a crankshaft of the scroll compressor for discharging a portion of the oil passing through an oil passage formed through the crankshaft to the outside of the crankshaft, a by-pass means is installed at the oil discharge port for opening or closing the oil discharge port by the centrifugal force of the oil generated by the rotation of the crankshaft, and when the compressor is operated at high speed, a portion of oil passing through the oil passage of the crankshaft can be discharged to the outside of the crankshaft and returns to an oil storing portion. Accordingly, excessive supply of oil to a compression portion is prevented, oil consumption is decreased, and the efficiency of volume of the compressor is heightened.

Abstract: An anti-rotation device for a scroll compressor. The scroll compressor includes intermeshed and nested stationary and orbiting scroll elements which define at least one spiraling compression pocket therebetween and an orbital drive mechanism for driving the central axis of the orbiting scroll element about the central axis of the stationary scroll element. The anti-rotation device maintains the orbiting scroll element substantially non-rotational with respect to the stationary scroll element during its orbit thereabout and includes at least one anti-rotation bearing which includes a first bearing element mounted stationary with respect to the stationary scroll element, a second bearing element mounted on the orbiting scroll element and an offset crank member.

Abstract: A scroll-type compressor includes a housing having a suction chamber with a suction port provided on a wall of the housing that opens into the suction chamber. The compressor also includes first and second scroll members at an angular and radial offset for forming fluid pockets, each scroll member having a spiral element. A groove is formed on an inner surface of the housing and an outer peripheral surface of one of the spiral elements. The groove extends in a circumferential direction of the housing at a position to include the suction port and forms an oil path for introducing oil into the interior of the housing when the compressor is assembled. Because the oil path is formed regardless of the position of the scroll member, oil may be introduced into the interior of the housing through the suction port without generating an overflow of oil to the outside of the housing.