Abstract: A sealed motor-compressor unit having a suction side muffler directly attached to the cylinder head by a niche in the cylinder head which receives the muffler. A "U" shaped spring has two legs contacting sidewalls of the niche and a bight portion which contacts and biases the muffler.

Abstract: The present invention concerns a noise reduction method and a noise reduction device for a hermetic rotary compressor. It is designed to reduce the very high level of low frequency sound generated by the compressor by preventing the formation of reflected waves along the circumference which produce the resonant sound mode, and thus by preventing the amplification of the low frequency gas pulsations. In the present invention, the amplitude of the reflected waves that form the resonant sound mode is reduced by installing the muffler outlets at one half the wavelength of the reflected waves in the cavity of the compressor housing from the exhaust valve where the compressed gas from the cylinder enters the muffler. By positioning these outlets to face each other so that, of the pulsating gas components form these two outlets, those at the frequency of the reflected waves formed in the circumferential direction of the cavity of the compressor housing will undergo a 180.degree.

Abstract: Fluent material is discharged with a radial velocity component from outlet orts of a positive displacement compressor for flow through a continuous volute passage to a receiver. The volute passage has a flow path geometry arranged to both minimize pulsations of the fluent material delivered to the receiver and optimize operation of the compressor.

Abstract: A sound barrier cover for a compressor unit which has a housing provided by a substantially continuous wall which provided with a plurality of access ports therethrough. The barrier cover has first and second shell sections configured to lie close to the housing wall and substantially envelope the same wherein the shell sections are configured to provide two substantially longitudinally oriented halves each having sound absorbing material affixed to its inner surface. These halves have perimeters with portions thereof formed with mating tongue and groove structure and carry cooperating components of snap-fastener devices in close proximity to the perimeters. These snap-fastener devices are adapted to hold the perimeters in contact with each other and with the sound absorbing material in resilient contact with the housing.

Abstract: A noise attenuator for a refrigerant-circulating compressor includes a casing whose interior space is divided into first and second chambers. The first chamber has an inlet for receiving refrigerant and is connected by a conduit with the second chamber. Additional conduits connect the second chamber with the compressor inlet. The cavity length L of the first chamber is determined as a function of a compressor noise to be attenuated, using the formula fr=C/4L (2n+1), where fr is the frequency of the noise, C is the speed of sound in refrigerant, and n is any whole integer (including zero). The first chamber may comprise a first portion and a second portion in the form of a branch line, with the cavity length L being defined by a combination of both of the portions.

Abstract: A structurally improved reciprocating compressor is disclosed. The compressor has a base muffler which acts not only as a refrigerant suction pipe and gasket but also as an arrangement for preventing heat from being transferred to the input refrigerant. The base muffler is interposed between the valves and cylinder head. Due to the base muffler, neither the motor heat nor the compressing heat is transferred to the input refrigerant passing the suction pipe part of the base muffler. The base muffler prevents an increase in the specific volume of the input refrigerant and causes smooth circulation of the refrigerant in the compressor. The present invention thus improves refrigerant compressing efficiency and refrigerating capacity of the compressor, and reduces the cost, and improves productivity of the compressor.

Abstract: The present invention relates to a motor-driven rotary compressor provided with a muffler. The muffler is provided with gas discharge outlets which are inclined so that the gaseous discharge creates a force for augmenting the rotation of the rotor and thereby reducing the power consumption.

Abstract: A multi-piston type refrigerant compressor having a cylinder block unit in which a plurality of cylinder bores receiving a plurality of reciprocating pistons for sucking a refrigerant gas, compressing the refrigerant gas, and discharging the compressed refrigerant gas, and a piston reciprocating actuating mechanism are housed, and a muffling unit defined by upright walls integral with the cylinder block unit and including a suction pulsation damping chamber, a discharge pulsation damping chamber, and an arrangement in which the covering plate of the muffling chamber, having ports formed so as to fluidly connect suction and delivery gas pipes to the muffling chamber, is arranged to be inclined, with respect to a horizontal plane, towards one of the cylinder block units.

Abstract: A muffler (20) for attenuating fluid pressure pulsations produced by (14) in an automotive air conditioning system (10) includes a housing (22) having opposed to axial ends, an inlet opening (40) and an outlet opening (42) both disposed at the same axial end of the housing. A tube (44) extends through the inlet opening (40) and into the housing, the tube having a first portion (46) and a second portion (48), the second portion having a diameter smaller than a diameter of the first portion. A circumferential bead (50) limits the extension of the tube into the housing to a predetermined distance. A method of manufacturing such a muffler is also disclosed.

Abstract: A compressor includes a motor for reciprocating a piston which sucks-in refrigerant through an inlet, and discharges compressed refrigerant through an outlet. A cylinder head forms a discharge chamber communicating with the outlet, and also forms a recess disposed opposite the inlet. Mounted in the recess is a base muffler which includes a pair of elastically flexible, tapered tubes connected by a snap-in connection to a suction muffler. Refrigerant travels through the suction muffler and the base muffler to the inlet. The base muffler insulates the refrigerant from heat radiated by the motor. A capillary tube conducts oil from an oil reservoir to the base muffler for being mixed with the refrigerant.

Abstract: A shell for a hermetic compressor unit, the shell having a top section or dome, and a bottom section, the dome having a unique shape which gives enhanced capacity for absorbing and attenuating structural and fluid transmitted wave energies emanating from the unit at wave frequencies of between 1,000 Hz and 2,000 Hz, while reducing total operating noise of the unit, the dome being formed of sheet metal and having a generally inverted cup-shaped configuration with generally cylindrical sidewalls and a top wall having a central portion surrounded by a peripheral portion, wherein the sidewall taken in a generally axial direction is substantially straight, wherein the central portion of the top constitutes from about 40 to about 90% of the total area of the top and has a generally hemispherical configuration on a mean radius of from about 6.5 to about 10.0 inches as measured from an origin point O.sub.

Abstract: Noise reduction in a screw compressor based refrigeration system is achieved by the use of multiple compressor discharge and/or suction lines. The lines are configured and/or fabricated from materials which reduce system noise which would otherwise be induced by vibration as well as the system noise associated with gas pulse energy in the discharge gas stream flowing from the compressor.

Abstract: A hermetic compressor including a suction muffler disposed opposite the suction inlet tube. A funnelled or countersunk inlet port on the muffler permits semi-direct refrigerant flow into the muffler, creating enhanced cooling of the motor and higher compressor efficiency. Baffle walls disposed parallel and on opposite sides of an internal standpipe within the suction muffler create an increased resonator effect with optimum refrigerant throughput.

Abstract: Pulses are sensed at the inlet and outlet of a two-chamber reflective muffler and responsive thereto the cavities are tuned to the frequency of the pulses. Specifically, chamber walls are moved to have them located at spacings corresponding, respectively, to one half and one quarter of the wavelength of the pulses.

Abstract: A hermetic compressor includes a sealed casing which accommodates therein a compressing unit for compressing a refrigerant and a driving unit for driving the compressing unit. A communication passage is provided for establishing communication between the compressing unit and a discharge muffler. The discharge muffler is formed therein with a substantially annular hermetic passage for the compressed refrigerant introduced via the communication passage. In the substantially annular hermetic passage, the introduced compressed refrigerant is bifurcated in opposite directions. The substantially annular hermetic passage has an outlet in the discharge muffler. At the outlet, the bifurcated refrigerant joins and flows out of the substantially annular hermetic passage so as to reduce pressure pulsation of the compressed refrigerant by canceling pressure pulsation components contained in the bifurcated refrigerant.

Abstract: A noise suppressing apparatus for a hermetic reciprocating compressor. A soundproof chamber is provided at a lower shell. A suction pipe passes through the soundproof chamber and is divided into inner and outer suction pipes spaced from each other in the soundproof chamber. The inner suction pipe is connected to a suction muffler in such a manner that the inner end of the inner suction pipe is inserted in a spring, and a resilient member is formed about the inner end and the spring and inserted into the suction muffler. Thus the apparatus can diminish noise as well as heat transfer, thereby achieving high efficiency.

Abstract: A noise suppressor for hermetic compressors comprises a one piece elongate damper element twisted in the form of a helix, with adjustable pitch for the noise frequency band that one wishes to damp. The damper element is designed to be inserted in a gas passage duct of small hermetic refrigeration compressors, for the purpose of reducing the noise emitted by the compressor, by the opening and closing movements of the suction valve and by the flow of refrigerant gas.

Abstract: A refrigerant suction and discharge apparatus for a hermetic compressor includes a suction pipe drawing refrigerant from the exterior of the hermetic compressor, a suction muffler having a hollow cavity at one side and, another side, an intake opening provides a communication into a suction chamber, and at least two guide pipes positioned adjacent to the outlet opening of the suction pipe to refrigerant gas from the suction pipe gas into the suction muffler.

Abstract: A muffler system for a refrigeration motor-compressor comprising an upper and lower case, a compressor formed by a motor and by a body in which a muffler is fixed, a tube fixed to the lower case conveying the refrigerant gas into the cases, an asymmetric side groove provided along the muffler and positioned with regard to the tube, through which the gas arrives in the case, in such a way that the refrigerant gas passes near a farther side of the groove with an angle of incidence causing the alien particles suspended in the gas to rebound far from the muffler and the gas to be kept by the groove side nearer to the tube and an inlet in the groove for conveying the gas to the compressor cylinder.

Abstract: A refrigeration compressor incorporating an improved suction muffler is disclosed. The suction muffler provides dual sound attenuating chambers within a single housing, which housing is secured to the suction inlet conduit extending between the motor cover and suction inlet for the compressor. The suction inlet conduit is increased in diameter between the motor cover and the compressor inlet to provide a stepped portion which operates to reflect pressure waves. Integrally formed openings in the sidewall of the conduit provide communication with each of the two chambers and the respective chambers may be tuned to attenuate different specific frequencies. Internal integrally formed baffles within each of the chambers serve to reduce standing waves within the chambers as well as adding stiffness to the muffler.

Abstract: A hermetic compressor including a vibration damper situated around the outside of the compressor housing. The vibration damper is constructed from a length of wire wrapped around the housing to form a plurality of windings each winding in contact simultaneously with an adjacent one and the housing. The wire is wrapped about portions of the housing having the highest acceleration and vibration production potential. Alternatively, the windings may be formed of separate wires connected to a bracket and, further, more than one layer of windings of the equal or different diameters is possible.

Abstract: A suction conduit assembly mounting has a plurality of retaining tabs located at the open end of the suction conduit assembly which mates with a plurality of slots located in a motor cover of a compressor. The plurality of tabs are aligned with the plurality of slots, the suction conduit assembly is assembled to the motor cover and rotated into position. An integral annular sealing ring is located on the open end of the suction conduit assembly spaced inward from the plurality of retaining tabs. The assembly of the suction conduit assembly elastically deflects the annular sealing ring to effect a seal between the motor cover and the suction conduit assembly as well as eliminating any type of noise or rattle caused by relative movement of the two components.

Abstract: A hermetically sealed electric motor compressor, comprising a hermetically sealed casing, a reciprocating compressor unit mounted within the casing and compressing a working fluid, the compressor unit having a first discharge passageway, a valve assembly mounted within the casing and opening and closing the first discharge passageway, the valve assembly having a second discharge passageway, a discharge port mounted to the second discharge passageway within the casing and including a muffler. The muffler defines a plurality of resonance chambers. The discharge port includes a base plate having a projection. The valve assembly includes a reed valve assembly including a reed valve and a valve backer mounted behind the reed valve.

Abstract: A hermetic compressor system includes a compressor and an electric drive resiliently supported in a closed housing. A metallic cylinder head is secured to the compressor and defines an insertion hole. The cylinder head has a suction chamber, which communicates with the insertion hole, and a discharge chamber integrally formed with and adjacent to the suction chamber. A suction muffler made of a synthetic resin or equivalent material of low thermal conductivity has a communicating duct extending through the insertion hole and partially disposed within the suction chamber. An opening is formed in the end of the communicating duct disposed within the suction chamber in a position facing a suction port leading a refrigerant gas into the compressor.

Abstract: A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. A cylinder block contains a plurality of reciprocating pistons within compression chambers. The compression chambers include a discharge valve which permits compressed refrigerant to empty into the common discharge chamber. A baffle system is included within the common discharge muffler chamber to eliminate pressure pulses and cross talk between discharge valve assemblies, thereby increasing the discharge valve opening speed and correspondingly increasing the compressor efficiency.

Abstract: A cylinder head of a hermetic reciprocating compressor comprising a main base mounted on a head plate of a cylinder of the compressor, an exhaust cover for exhausting a compressed fluid which was compressed in the cylinder, the exhaust cover being mounted on the main base, and a suction cover, including resonance chamber, for sucking a fluid which is to be compressed in the cylinder, the suction cover mounted on the main base so as to have a horizontal and vertical part, the horizontal and vertical part being spaced from the exhaust cover in a predetermined clearance. The present invention provides a cylinder head for a hermetic reciprocating compressor in which the temperature of the intake refrigerant gas is considerably reduced, thereby providing advantage in that it improves the compression efficiency of the compressor such as about 8% increase in case of 24 cc grade compressor and about 12% increase in case of 75 cc grade compressor.

Abstract: A hermetic compressor comprising a compressing mechanism and a housing for encasing the compressing mechanism, the housing comprising upper and lower portions which are coupled to each other and being formed to have curved surfaces. The housing is constructed such that one curved line on the housing is arranged to be different from other curved lines existing at positions symmetrical with a position of the one curved line with respect to planes X, Y and Z perpendicular to one another and passing the housing, the plane X including a boundary portion between the upper and lower portions of the housing and being perpendicular to a center line passing through a center of an upper surface of the upper portion and a center of a bottom surface of the lower portion, and the planes Y and Z being perpendicular to each other and perpendicular to the plane X and including the center line.

Abstract: A noise reduction method using a muffler for connection to the air inlet of an air compressor including an imperforate, hollow housing enclosing a chamber, air inlet and outlet openings in the housing, an air inlet tube in the housing connected to the air inlet opening and an air outlet tube in the housing connected to the air outlet opening, both tubes extending over half the length of the chamber, and the openings in the distal ends of the tubes facing in the opposite directions.

Abstract: A suction structure for electrically-driven hermetic compressor. The compressor comprises a suction muffler having an upper outlet and a lower inlet which is formed at its bottom with means for discharging refrigerating oil, first elastic means for adsorbing vibration occurring during operation of compressor and guiding suction gas into the suction muffler which is fitted in the lower inlet of the suction muffler, second elastic means for fixing the first elastic means to the inlet of the suction muffler which is interposed between the inlet and the first elastic means without a gap therebetween, and filtering means for preventing refrigerating oil from being introduced into a cylinder which is disposed to the inlet of the suction muffler. Therefore, the suction structure can prevent refrigerating oil from being introduced in the cylinder and also prevent damage and generation of the inlet of the suction muffler due to interference therebetween is prevented, thereby improving performance of compressor.

Abstract: A centrifugal compressor is provided with a collector for receiving refrigerant from the diffuser, and sound absorbent silencer segments are placed within the collector and retained in place against one wall thereof. The silencer segments are held in place by machine screws that penetrate graduated openings in the side wall of the collector. The machine screw shaft fits a threaded nipple on the silencer segment that also fits into the opening. A sealing plug is disposed in a wide part of the opening above the machine screw head to prevent leakage of the compressed refrigerant.

Abstract: A suction gas feed assembly for a gas compressor unit having a shell, an electric motor driven dual piston compressor mounted therein having dual suction ports, one end of the motor being interconnected with and adjacent the compressor, the other end of the motor being substantially unencumbered, the feed assembly consisting of an end cap having a circumferential side wall and a top wall and adapted to be mounted within the shell with the side wall in substantial sealing contact with the unencumbered end of the motor to provide a suction plenum substantially containing the unencumbered end, dual suction conduits each having one of its ends mounted in an aperture in the side wall of the end cap, the apertures being spaced apart on the side wall a distance of at least about one eighth the total circumferential dimension of the side wall, the other ends of the conduits adapted to be mounted in communication with the suction porting of the compressor, intermediate portions of each of the conduits lying in contigu

Abstract: A gas flow system for a hermetic compressor is described which reduces the transfer of heat from the cylinder head and the hot discharge gases along with other hot internal compressor parts, wherein a separately formed suction tube is made from a low thermal conductivity plastic and is adapted to be received in a separately formed cylinder head. The cylinder head includes discharge chambers formed integrally therein but is adapted to receive the suction tube, while the suction tube includes a conduit defining a suction plenum having a suction inlet and adjutages extending transverse to the conduit which extend to the valve plate and communicate with openings in the cylinder head in order that the refrigerant flowing therein bypass the hot cylinder head and flows directly into the cylinder. The gas flow system also provides cooling for the motor in which a part of the refrigerant which flows into the suction tube is directed through the motor.

Abstract: A muffler tube for use in a hermetically sealed compressor is disclosed. The muffler tube of the present invention has a roughened outer finish, and has a protuberance extending radially outwardly therefrom, which protuberance is received in a recess in the inner wall of the muffler. The combination of the roughened outer finish and the protuberance connection assist in preventing the muffler from turning on the tube, and from moving vertically on the tube.

Abstract: A muffler and an oil separator located within a common shell. The muffler includes a plurality of chambers tuned to different frequencies. The flow path is serially through the muffler into contact with an agglomerating pad followed by flow through demister pads and a coalescer.

Abstract: A hermetic refrigeration compressor of the single reciprocating piston type as a valve plate extending over the open end of the cylinder and a first cylinder head secured to the valve plate and enclosing a discharge planum. The first cylinder head includes a recessed portion adjacent a suction port and has a bridge portion extending across the recess above the valve plate. The suction side includes an integral suction muffler and second cylinder head which fits within the recess to include a planum overlying the suction port and a U-shaped spring clip engages the bridge with one leg between the bridge and the second cylinder head to hold it in place while the clip includes a second leg which extends over the top of the bridge and hooks on the side to hold the second cylinder head and the spring clip in place.

Abstract: A refrigerant compressor discharge muffler which operates on the principle of a closed chamber resonator is disclosed. The muffler includes a generally J-shaped tube and an outer shell adapted to be threadably affixed to the head of a motor-compressor unit. The J-shaped tube is partially disposed within the outer shell and has a plurality of arrangements of apertures extending through the wall of the tube interconnecting the internal passage of the tube with a chamber defined by the outer shell. The spacing and size of the apertures are determined by a relationship to a frequency desiring to be attenuated.

Abstract: A resonator of a hermetic rotary compressor in which noise is reduced to a maximum extent by effectively absorbing high frequency pressure components inside a cylinder of the compressor. The resonator comprises a resonator space of bi-level configuration disposed between a bearing flange and a matching cylinder face surface. This resonator space communicates with a discharge part defined in the compressor through an entrance channel which has a tapered surface to form a narrow inlet and a wide outlet. With this construction, the resonator effectively reduces the high frequency component out of gas pulsation generated in the cylinder.

Abstract: Suction muffler assembly for hermetic compressors of the type including a cylinder block (4) mounted in the upper part of a hermetic case (3) and provided with a cylinder (10) lodging a reciprocating piston (15); a valve plate (11) attached to an open end of the cylinder (10) and having a suction orifice (11a); a suction muffler assembly attached to the cylinder block (4) and including a hollow muffler body (100) provided with a gas inlet opening (101, 130a) and a gas outlet opening (121); and a suction duct (140) having one inlet end (141) connected to the gas outlet opening (121) and an opposite outlet end (142) in communication with the suction orifice (11a) of the valve plate (11), said hollow muffler body (100) being formed of a lower part (110), presenting an end peripheral edge (117), and a cover upper part (120) carrying the gas outlet opening (121) of the muffler body (100) and including a peripheral lower seating surface portion (127) to be seated onto the end peripheral edge (117) of the lower part

Abstract: A discharge muffler construction having a casing which defines a noise attenuation cavity and which is provided with an inlet and outlet located at substantially opposite portions thereof and communicating with the cavity, a baffle plate in the cavity intermediate the inlet and outlet and partitioning the same into at least two chambers, the baffle plate having an arcuate surface concave to the inlet, an aperture through the baffle plate, and a tubular conduit mounted through the aperture and placing the chambers in fluid communication.

Abstract: A refrigerant compressor is disclosed having pistons that reciprocate in radially arrayed cylinder bores of a cylinder block. A discharge chamber is formed in the compressor. A valving means including a timing plate is positioned within the discharge chamber, and alternately covers and uncovers the compressor outlet port. The timing plate includes spaced variable flow orifices to thereby attenuate the pressure pulsations that occur during the operating cycle. The timing plate is a circular disc rotatably connected to the end of the compressor drive shaft. Each flow orifice is pear-shaped and positioned with a constant radial and circumferential spacing for synchronization with the cylinders.

Abstract: A radial compressor for a vehicle air conditioning system includes a cylinder block having an array of radially arranged cylinders. Each cylinder defines a piston receiving bore that is closed by a discharge valve assembly. A piston assembly is received for reciprocation in each bore by a drive assembly that is operatively connected to the engine of the vehicle. The compressor also includes an annular discharge chamber defined between the periphery of the cylinder block and an outer cylindrical shell. Dams extend into the discharge chamber adjacent the side of the bores closest to a single discharge port; that is downstream of the bores. The dams act as baffles to reflect incident pressure waves to reduce gas pulsations, vibrations and noise.

Abstract: A muffler tube for use in a hermetically sealed compressor is disclosed. The muffler tube of the present invention has a roughened outer finish, and has a protuberance extending radially outwardly therefrom, which protuberance is received in a recess in the inner wall of the muffler. The combination of the roughened outer finish and the protuberance connection assist in preventing the muffler from turning on the tube, and from moving vertically on the tube.

Abstract: A fractional horsepower single cylinder refrigeration compressor utilizes a discharge muffler system having a discharge plenum and a pair of muffler chambers. The muffler chambers and interconnected by a transfer tube while separate passages run from the discharge plenum directly to each of the muffler chambers. One of the muffler chambers is then connected to a discharge line to the exterior of the compressor case.

Abstract: A centrifugal compressor is provided with a collector for receiving refrigerant from the diffuser, and sound absorbent segments are placed within the collector and retained in place against one wall thereof. One method of retention is by way of a ring and a plurality of spring clip members. The silencer segments and the retaining ring and spring clip members are placed into the collector prior to installation of the diffuser. As the diffuser is attached to the collector, one edge engages a side of the ring so as to axially move it into its final fixed position, while at the same time causing the attached spring clip members to be placed in tension against the silencer segments to secure them in place.

Abstract: A suction noise attenuator for in-line placement in one or more suction gas conduits of a gas compressor unit, and having an elongated, tubular body or shell having a base end and a closure end, a base cap on the base end and a closure cap on the closure end, said caps and body forming an elongated, substantially closed attenuation cell having major and minor transverse axes oriented normally to each other, an elongated wave modulating barrel formed on or affixed to the closure cap and having major and minor transverse axes oriented normally to each other, the barrel being positioned within the cell substantially longitudinally thereof with the major transverse axis of the barrel being angularly offset from the major transverse axis of the cell and substantially dividing the cell into enlongated substantially equal volume halves, a socket receiving the distal end of the barrel and being formed in the interior surface of the base cap and defined by a floor and a sealing wall surrounding the same and extending

Abstract: A screw rotor machine which incorporates a sound silencing device in the vicinity of the inlet and/or outlet port. The sound silencing device comprises a De Laval nozzle (8) having a valve body (9) which is movable axially in relation to the nozzle. When the machine is shut-down, the valve body (9) lies sealingly against the opening (8A) of the nozzle. When increasing the capacity of the machine to full load, the valve body (9) moves in the opening direction under the influence of a damping force and against the action of a substantially constant spring force (14), so as to maintain a flow rate immediately beneath the sound of speed in the smallest area (8A) of the nozzle (8).

Abstract: A variable displacement wobble plate type refrigerant compressor includes a plurality of axially reciprocating pistons. A drive shaft rotates the wobble plate and thereby reciprocates the pistons within their respective compression chambers. Gaseous refrigerant is admitted to each compression chamber through a suction valve and discharged from each compression chamber through a discharge valve. Each discharge valve opens to a common discharge cavity. A hub is rotatable supported about a fixed axis within the discharged cavity, or downstream of the discharge cavity. A plurality of blades pivotally extend from the hub. A compression spring is disposed inside the hub for biasing the blades toward a flat condition.

Abstract: A suction noise attenuator adapted for mounting on a tubular, suction conduit of a gas compressor, the conduit having a gas port through the wall thereof, the attenuator having a shell formed with generally opposed, first and second end walls and generally opposed first and second side walls, all of the walls having proximal and distal portions relative to the suction conduit, the proximal portions being resiliently deformable and the combined edges thereof providing a substantially continuous perimeter mounting face, a distal wall interconnecting the distal portions of all the walls to define an attenuation cavity, the mounting face further defining an inlet to the cavity, the edges of the end walls being concave and adapted to conform substantially to the periphery of the conduit as the attenuator is pressed thereagainst, at least one locator device on the shell adapted for coupling with at least one locator device on the conduit for operatively positioning the attenuator on the conduit to connect the port

Abstract: A variable displacement refrigerant compressor includes a plurality of axially reciprocating pistons connected to a non-rotary wobble plate. A drive shaft supplies a rotational input to axially reciprocate the pistons within their respective cylinders. Gaseous refrigerant is admitted to each cylinder through a suction valve and discharged from each cylinder through a discharge valve. Each discharge valve opens to a common discharge cavity, wherein one fluid outlet provides egress for all refrigerant discharged from each of the cylinders. A variable restriction attenuator is disposed in the discharge cavity. The attenuator includes a first orifice having a movable valve member biased into sealing engagement therewith. The attenuator also includes at least one second orifice through which discharge fluid bypasses the movable valve member and first orifice and flows directly to the fluid outlet. The movable valve member may be either a spherical ball, poppet or flapper type valve.

Abstract: A hermetic reciprocating piston refrigeration compressor utilizes separate cylinder head members for the discharge and suction plenum chambers adjacent the discharge and suction valves. The two cylinders heads extend over substantially the entire area of the valve plate at the end of the cylinder carrying the valves. A discharge cylinder head is formed of metal while the suction cylinder head is formed of a plastic material of low thermal conductivity to minimize heat transfer between the discharge and suction plenums. The suction cylinder head is formed as a unitary member to include also passages and a portion of the suction muffler and is secured in place by a single fastening member.