Abstract: Provided is a rotary compressor excellent in energy saving performance and reliability that can suppress over-compression of a compressed refrigerant compressed in a compression chamber. A rotary compressor includes a discharge port provided on an end plate and partially located outside a cylinder inner wall and a discharge groove provided on the cylinder inner wall and communicating with a compression chamber and the discharge port, the compression chamber compressing a refrigerant by contracting as an annular piston revolves, in which the discharge port faces an end portion of a vane groove on the cylinder inner wall on the compression chamber side.

Abstract: Provided is a rotary compressor excellent in energy saving performance and reliability that can suppress over-compression of a compressed refrigerant compressed in a compression chamber. A rotary compressor includes a discharge port provided on an end plate and partially located outside a cylinder inner wall and a discharge groove provided on the cylinder inner wall and communicating with a compression chamber and the discharge port, the compression chamber compressing a refrigerant by contracting as an annular piston revolves, in which the discharge port faces an end portion of a vane groove on the cylinder inner wall on the compression chamber side.

Abstract: A linear compressor includes: a shell including an intake pipe configured to suction a refrigerant, a piston configured to reciprocate in an axial direction and including a piston body, and an intake muffler coupled to the piston and configured to flow the refrigerant into the piston body and reduce a noise from the refrigerant. The intake muffler includes a first muffler disposed inside the piston body, a second muffler disposed at a rear side of the first muffler and in fluid communication with the first muffler, and a third muffler including a third muffler body having a cylindrical shape with an empty interior and configured to accommodate a portion of a rear end of the first muffler and the second muffler in the third muffler body. The third muffler body includes a streamlined portion having diameters reduced toward a rear side of the third muffler body in the axial direction.

Abstract: A linear compressor includes a frame, a cylinder disposed in the frame, a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axis of the cylinder, a discharge valve disposed forward relative to the piston, and a discharge cover assembly coupled to the frame and disposed forward relative to the piston. The discharge cover assembly includes a discharge cover forming an inner space, a first discharge plenum disposed in the discharge cover and configured to partition the inner space into a plurality of discharge spaces, and a second discharge plenum disposed forward relative to the first discharge plenum and being in close contact with an inner surface of the discharge cover.

Abstract: A rotary compressor may include a case, a cylinder, a roller, a vane, a main bearing and a sub bearing, and a discharge passage defined in the main bearing or the sub bearing to discharge refrigerant compressed in a compression space. The discharge passage may include at least one discharge hole formed through the main bearing or the sub bearing, and at least one discharge guide groove having a first end that communicates with the at least one discharge hole and a second end that extends from the at least one discharge hole toward a contact point between the cylinder and the roller and is recessed from one surface of the main bearing or the sub bearing forming the compression space. Accordingly, an amount of refrigerant remaining in the compression space even after a discharge stroke may be reduced.

Abstract: A compressor including a shaft, a flange to support shaft, and a muffler to reduce noise generated in a compression chamber of the compressor. The flange including a plurality of noise reductions units each of which is formed to have a different volume and at least a portion of the noise reduction unit is covered by the muffler.

Abstract: The present invention relates to a linear compressor. A discharge unit of the linear compressor according to an aspect of the present invention includes a discharge cover coupled with the frame. In addition, the discharge cover includes a cover flange portion and a chamber portion. At this time, the cover flange portion includes a flange main body having a main body penetration portion and a main body extension portion provided outward in a radial direction so as to face the main body penetration portion, and a flange coupling portion having a flange coupling hole into which a fastening member for coupling with the frame is inserted.

Abstract: A rocking piston vacuum pump or compressor may have a sound attenuation assembly. The sound attenuation assembly may comprise a sound attenuation chamber. The chamber may have a first silencer disposed therein with sound dampening foam disposed therein. A second silencer may be disposed in series relative to the first silencer and may be disposed externally of the sound attenuation chamber.

Abstract: Disclosed is a linear compressor. The linear compressor according to the spirit of the present invention includes a cylinder forming a compression space for refrigerant and a discharge unit forming a discharge space for refrigerant into which refrigerant discharged from the compression space flows. The discharge unit includes a discharge cover having an inner space formed therein and a discharge plenum placed in the inner space. In this case, the discharge plenum includes a plenum flange extending radially, a plenum seating part, a plenum body, and a plenum extension part which extend from a radially inner side end of the plenum flange, and a plenum guide surface extending from a radially outer side end of the plenum flange toward the inner space.

Abstract: A linear compressor includes a shell, a frame in the shell, a cylinder defining a compression space, a piston in the cylinder, a motor assembly that drives the piston, a discharge cover unit defining a discharge space that receives refrigerant from the compression space, a discharge valve that selectively opens and closes the compression space, and a valve spring assembly that provides elastic force that causes the discharge valve to contact a front surface of the cylinder. The discharge cover unit includes a cover housing, the cover housing that couples the frame, a dividing sleeve that extends from an inside of the cover housing in a longitudinal direction of the shell and that divides the discharge space into discharge chambers, and a discharge cover that inserts into the inside of the cover housing and that contacts an end portion of the dividing sleeve.

Abstract: Systems and compression assemblies thereof are provided. In one example aspect, a system includes a cooling fluid circuit and a piston slidably received within a chamber of a casing. The casing defines an inlet passage and an outlet passage. The inlet passage receives a cooling fluid, e.g. oil or a refrigerant, from the cooling fluid circuit. The cooling fluid flows into the inlet passage and downstream into an inlet groove defined by the piston along its outer surface. The cooling fluid flows downstream to a cooling channel defined by a piston head of the piston and thereafter into an outlet groove defined by piston along its outer surface. The cooling fluid then flows into outlet passage of casing and is returned to cooling fluid circuit. The passage of cooling fluid through the passages, grooves, and channels removes heat from the casing and the piston.

Abstract: A rotary compressor includes: a shell defining an internal space; a driving motor arranged in the internal space of the shell; and a compression mechanism unit to receive power of the driving motor and compress refrigerant, wherein the compression mechanism unit includes: a cylinder defining a chamber in which the refrigerant is compressed; a rotary shaft connected to the driving motor; a roller located in the chamber and connected to the rotary shaft to compress the refrigerant in the chamber while being rotated; a bearing coupled to the cylinder and having a discharge port through which the refrigerant compressed in the chamber passes; a muffler coupled to the bearing and into which the refrigerant passing through the discharge port is introduced; and a noise reducing unit fixed to the muffler to define a noise reducing chamber together with the muffler.

Abstract: A linear compressor is provided. The linear compressor may include a discharge cover including a plurality of covers stacked in an axial direction.

Abstract: The present invention relates to the technological field of acoustic filters applied to hermetic compressors. Problem to be solved: In hermetic compressors applied in cooling system, the work fluid sucked by the compression mechanism is hotter than the work fluid coming from the evaporator, and it is known that greater the temperature of this fluid, smaller is the efficiency of the compressor. Resolution of the problem: It is revealed a suction acoustic filter and a suction line including this acoustic filter capable of guarantee that the compression mechanism works mainly with the work fluid coming from the evaporator, which is colder than the work fluid accumulated inside the environment defined by the hermetic housing of compressor.

Abstract: A pneumatic compressor is provided and includes a cylinder head having a first muffler cavity for drawing an intake air. Also included in the compressor is a compressor shroud including an inertial filter having a filter slot, and an integral muffler, wherein the inertial filter and the integral muffler are integrally formed within the compressor shroud.

Abstract: A communication pipe outlet (263) of a suction muffler (26) included in a hermetic compressor (10) includes a communication opening (264). An upper shape (264a) of the communication opening (264) is a curved protruding shape, and a lower shape (264b) of the communication opening (264) is a rectangular shape. A suction hole (33) of a valve plate (30) included in the hermetic compressor (10) is formed such that the cylinder side of the suction hole (33) has a non-recessed closed-curve shape, and the communication pipe side of the suction hole (33) has a shape similar to that of the communication opening (264). The valve plate (30) and a communication pipe (262) are connected in a state where an upper peripheral surface of the communication opening (264) of the communication pipe outlet (263) corresponds to an upper peripheral surface of the suction hole (33).

Abstract: A reciprocating compressor is provided that may include a shell, a suction pipe coupled to the shell, a driver provided inside of the shell that generates a rotational force, a compression device including a connecting rod that converts the rotational force into a linear driving force, a piston coupled to the connecting rod, and a cylinder into which the piston is movably inserted, a suction muffler provided inside of the shell that reduces a pressure pulsation of a refrigerant suctioned through the suction pipe, and a suction guide that extends from the shell to the suction muffler and includes at least one protrusion that contacts an inner surface of the shell.

Abstract: A discharge muffler may include a discharge space in the cylinder block and a pulsation and/or noise reducing member (e.g., a pulsation reducing member) engaged in the discharge space having a passage (e.g., a pulsation and/or noise reducing passage) on a circumferential surface configured to guide the working fluid to an inner space of the discharge space.

Abstract: The present invention refers to a compressor with an acoustic attenuator device, preferably those used in refrigeration systems, in general. More specifically, the present invention refers to an acoustic attenuator device comprising technical, structural, and functional features capable of simplifying the method of fabricating these parts and increasing acoustic attenuation levels of hermetic compressors, in general. In this sense, the attenuator device of the present invention comprises a hollow body closed by a cover to form a structure having at least one inlet hole and an outlet hole, wherein there is provided between said hollow body and said cover at least one intermediate body dividing said structure into at least two acoustic chambers (A, A?), and is formed by a platform provided with a connecting channel, which is in fluid communication between said acoustic chambers (A, A?) and further surrounds an outlet channel, which is interconnected with said outlet hollow disposed on said cover.

Abstract: A sealed compressor of the present invention comprises an electric component (103); a compression component (105); a sealed container (101); and a suction pipe (115); wherein the compression component (105) includes a compression chamber (141), and a suction muffler (115) through which a refrigerant gas flows; wherein the suction muffler (157) includes a muffler body (165) in which a muffling space (163) is formed, a tail pipe (159) through which a refrigerant gas is introduced into the muffling space (163); and a muffler cover (169) provided to surround the muffler body (165) such that a first space (167) is formed between the muffler cover (169) and the muffler body (165); wherein the muffler cover (169) is provided with a refrigerant inlet (175) in a portion which faces an outlet (117) of the suction pipe (115) and is in the vicinity of a suction port (171) of a tail pipe (159), the refrigerant inlet communicating the interior of the sealed container (101) with the first space (167).

Abstract: A sealed compressor according to the present invention comprises an electric element; a compression element; a sealed container; and a suction pipe. The compression element includes a compression chamber, a piston provided inside of the compression chamber, and a suction muffler communicating with the inside of the sealed container and the compression chamber. The suction muffler is laid out such that an opening portion thereof at the sealed container side faces an opening portion of the suction pipe at the sealed container side. The suction muffler includes: a hood section provided in the vicinity of the opening portion of the suction muffler to extend toward the inside of the sealed container, the hood section being configured to collect cooling medium gas discharged from the suction pipe; and an auxiliary hood fastened to the hood section and formed in a manner to increase a collection area of the hood section.

Abstract: To prevent oil from being drawn into a suction muffler of a compressor, a suction muffler 7 is disposed in a compressor casing at an inlet of a compression chamber at an upstream side of a refrigerant passage and positioned so that the suction muffler 7 receives oil, in which an upper lid member 71, and a lower lid member 72 having a bottom wall to which refrigerant introducing and leading-out pipes 8, 72d are connected, are fitted and secured by bringing an inner face of a side wall of the member 71 into tight contact with an outer face of a side wall of the member 72, and a protruding portion 72f is provided by forming a lower end of side wall of the member 71 to protrude below a lower face of bottom wall of the member 72, to surround connecting portions of the pipes 8, 72d.

Abstract: A compressor electrical component enclosure may include a base and a lid. The base may include first and second opposing surfaces and a magnet. The magnet may be coupled to the second surface and may secure the base to a compressor shell. The lid may engage the base and cooperate with the base to define an electrical component housing.

Abstract: A refrigeration compressor is provided and may include a shell carrying a suction-inlet tube having an outlet nozzle opened to the interior of the shell and a cylinder block to which is mounted a suction muffler that incorporates an admission tube provided with an inlet nozzle. The inlet nozzle of the admission tube may be disposed adjacent to the outlet nozzle of the suction-inlet tube. The inlet nozzle may admit under at least one of the conditions of underpressure in its interior or deflection of the refrigerant-fluid flow in the interior of the shell the gaseous phase and may direct the liquid phase to a region of the shell external to the inlet nozzle.

Abstract: A compressor assembly having a housing with a number of sound control chambers. A method of controlling a sound level of a compressor assembly having a step of providing a plurality of sound control chambers. A method of controlling a sound level of a compressor assembly having a step of eliminating an operator's line-of-sight view to noise producing components of the compressor assembly. Sound level of a compressor can be controlled by separating the internal volume of a housing which encases at least a portion of a pump assembly to create sound control chambers and/or eliminating an operator's line-of-sight view to noise producing components of the compressor assembly.

Abstract: A hermetic compressor, comprises: a hermetic shell (1); a cylinder block (2) defining, a shell portion (Ia) and a compression cylinder (3) having an end (3a) opened to the exterior of the hermetic shell (1) and closed by a valve plate (5); a head (6) affixed to the cylinder block (2), over the valve plate (5) so as to define, with the latter, at least one discharge chamber (10). The cylinder block (2) incorporates a tubular projection (20) surrounding the valve plate (5) and at least part of the head (6). An outer cover (30) is hermetically affixed to the tubular projection (20) for defining therewith a discharge plenum (31) in fluid communication with the discharge chamber (10), the tubular projection (20) or the outer cover (30) being provided with a refrigerant gas outlet (40) opened to the exterior of the hermetic shell (1).

Abstract: A sealing is arranged between a rear head having an ejection port configured and arranged to eject compressed refrigerant and a rear muffler disposed so that a muffler space is formed between the rear muffler and the rear head. The rear head includes a main body having a bearing hole, an annular boss portion protruding from the main body and circumscribing the bearing hole, and an annular side wall protruding from the main body and circumscribing the boss portion. The rear muffler has an opening and is fastened to the end surface of the side wall so that the peripheral portion of the opening contacts the end surface of the boss portion. Preferably, the end surface of the boss portion has a part entirely further from the main body than the end surface of the side wall.

Abstract: A multi-chambered pulsation absorber for attachment over the valve cap opening of a compressor cylinder. Each chamber is in fluid communication with the valve cap opening (or cylinder internal gas passages) via an associated choke tube. Each pairing of a chamber with a choke tube is tuned, in the manner of a Helmholz resonator, to attenuate and nearly eliminate a different cylinder-related pulsation frequency, such as those resulting from internal cylinder pulsations or cylinder nozzle pulsations.

Abstract: A compressor muffler (100) for a refrigeration system is provided with an array of Helmholtz resonators (130, 230, 330) formed along an inner surface of a muffler chamber (110) of the muffler.

Abstract: A noise reducing device for a hermetic type compressor is provided that includes a plate film in a connection member that connects a suction pipe and a suction muffler to each other. The plate film bends and opens when a refrigerant is sucked while preventing a back flow of noise. The plate film is capable of sucking the refrigerant without interference and preventing noise or pressure pulsation transferred in a direction of the suction pipe in the suction muffler, and thereby is capable of remarkably reducing noise of the compressor.

Abstract: A compressor has first and second enmeshed rotors rotating about first and second axes to pump refrigerant to a discharge plenum. The compressor includes a muffler system comprising a sound absorbing first element and a sound absorbing second element. The second element at least partially surrounds the first element and defines a generally annular flow path portion between the first element and the second element At least one of the first and second elements comprises an expanded bead material.

Abstract: A compression element is provided with a block, a piston, a valve plate arranged in an opening end of a compression chamber and forming a suction hole, a suction valve, a suction muffler forming a sound absorbing space and provided with a communication pipe, and a cylinder head, the communication pipe has a suction muffler outlet portion communicated with the suction hole, is arranged in such a manner as to extend in a vertical direction with respect to a center line passing through the suction hole, and is arranged in such a manner that a part of the suction muffler outlet portion covers a part of the suction hole in the suction muffler outlet portion positioned in a downstream side of refrigerant gas flowing through the communication pipe, in the case of projection the suction muffler outlet portion in a direction of a center line.

Abstract: A refrigerant compressor that includes a compressor housing enclosing an outlet chamber and an outlet passage leading from the outlet chamber to an external high pressure connection, such that the pulsations in it are damped as much as possible. The refrigerant compressor includes a pulsation damping element inserted into the outlet passage of the compressor housing following the outlet chamber. The pulsation damping element has an inlet baffle which faces the outlet chamber and extends over a cross section of the outlet passage and, located opposite to the inlet baffle is an outlet baffle which extends over the cross section of the outlet passage. At least one reflection chamber is provided between the inlet baffle and the outlet baffle. The inlet baffle and the outlet baffle each have at least one passage which faces a reflection surface on the respectively other baffle.

Abstract: A rotary compressor includes a rotation compression element, a discharge port and a muffler. The rotation compression element is configured to compress gas as a result of rotation of a crankshaft about a rotation axis. The discharge port is configured to discharge the gas compressed by the rotation compression element. The muffler is arranged to cover the discharge port and surround the crankshaft. The muffler has a muffler crankshaft hole through which the crankshaft passes, and a muffler discharge region configured to discharge the compressed gas discharged from the discharge port toward an outer surface of the crankshaft.

Abstract: A Inlet pipe (151) communicating the space inside the hermetic enclosure with sound absorbing space (147) of inlet muffler (145) is provided so as to be inclined downward from inlet-pipe inlet (155) toward inlet-pipe outlet (157). Outlet pipe (153) communicating sound absorbing space (147) with an inlet valve includes outlet-pipe inlet (161) and outlet-pipe outlet (163). Inlet-pipe inlet (155) and outlet-pipe inlet (161) are formed at substantially same height. Herewith, introducing a refrigerant gas to outlet-pipe inlet (161) making efficient use of potential energy of the refrigerant improves the compression efficiency and stabilizes the performance of the compressor.

Abstract: A silencer operative for a compressor or a vacuum pump, in particular for a compressor or a vacuum pump that operate according to the displacement principle, which in either case compresses a current of gas, in particular an air current, such that the silencer includes an entrance for the gas current that leaves the compressor, as well as an exit, the silencer including a branching region having an inflow channel which branches into two channel sections, such that a first channel section is constructed as a main conduit to conduct the gas current further, and a second channel section forms a branch that is closed at its end. The branch has an axial preferential direction oriented parallel to the direction of flow of the gas current in the inflow channel, so that the gas current impinges frontally on the branch that is closed at its end.

Abstract: An absorptive muffler assembly includes a first body and a second body surrounding the first body. A resilient mount having at least one resilient portion and at least one support arm supports the first body and isolates the second body from vibrations of the first body.

Abstract: A hermetic compressor having a frame, a cylinder provided at one side of the frame and having a compression chamber, a cylinder head coupled to the cylinder so as configured to hermetically seal the compression chamber and having a refrigerant discharge chamber to receive a refrigerant discharged from the compression chamber, a damping discharge chamber provided at the other side of the frame, a discharge guide path formed in the frame connecting the refrigerant discharge chamber and the damping discharge chamber, a discharge pipe having an entrance end connected to the damping discharge chamber, and an extension tube provided in the damping discharge chamber. The extension tube has an entrance end connected to an exit end of the discharge guide path, an exit end being spaced apart from an entrance end of the discharge pipe.

Abstract: A hermetic compressor has a hermetic container storing oil, and a compressing element accommodated in the hermetic container and compressing a refrigerant gas. The compressing element has a compression chamber, a cylinder forming the compression chamber, a piston inserted into the cylinder for reciprocation, and a suction muffler whose one end communicates with the compression chamber. The suction muffler has a sound deadening space, a gas flow forming part forming a gas flow flowing in a constant direction in the sound deadening space, and an oil discharge opening provided in a downstream side of the gas flow in a lower part of the sound deadening space. By this construction, there is realized a hermetic compressor in which the oil does not readily remain in the suction muffler, whose noise is lower, and whose performance is stabilized.

Abstract: A muffler that is externally mounted to a housing shell of a compressor. To externally mount the muffler to the housing shell and prevent unnecessary vibration of the muffler during compressor operation, an attachment device connects an essentially central portion of the muffler to the housing shell. The attachment device may also be adapted to house a pressure- or temperature-related sensor device.

Abstract: The present invention discloses a linear compressor in which a piston is linearly reciprocated inside a cylinder, for sicking a refrigerant into a compression space between the piston and the cylinder, and compressing and discharging the refrigerant, and especially, a structure of discharging the refrigerant for the linear compressor which can reduce a pulsation of a high pressure discharged refrigerant, by making the refrigerant compressed in the compression space flow from a sub-discharge space with a relatively small volume to a sub-discharge space with a relatively large volume in a discharge chamber. As a result, the structure of discharging the refrigerant for the linear compressor can efficiently reduce noise and vibration.

Abstract: A compressor has first and second enmeshed rotors: rotating about first and second axes. The first rotor is supported by a bearing system carried by a bearing case. The bearing case has at least a first port to a discharge plenum. A first sound-absorbing material is positioned within the first port.

Abstract: A multi-stage low pressure drop muffler for a compressor including a first plate having a hole, a tube attached to the first plate, a plurality of holes disposed around the circumference of the tube, a plurality of tubes extending through a second plate, and an internal ring disposed on the second plate between the center of the second plate and the plurality of tubes. The muffler is designed to muffle a wide range of frequencies, minimize pressure reduction, improve fluid flow, and improve compressor efficiency.

Abstract: A hyperbaric oxygen therapy system includes a pressure vessel containing a gas, an oxygen concentration measurement apparatus for monitoring the concentration of oxygen in the gas, an environmental control apparatus for controlling the temperature of the gas in the vessel, and a pressure/ventilation control apparatus for controlling the pressure of the gas in the vessel. The pressure vessel is capable of accommodating a patient. The oxygen concentration measurement apparatus includes an oxygen concentration analyzer and a plurality of gas lines connecting the oxygen analyzer to the pressure vessel. The pressure/ventilation control apparatus includes a pressure controlling valve, a pressure sensor, a ventilation valve, and a controller having a programmable pressure profile. The environmental control apparatus includes a scrubber, a heat exchanger and a blower located within the pressure vessel. A compressor for the system includes a compressor silencer.

Abstract: A compressor has first (26) and second (28; 30) enmeshed rotors rotating about first (500) and second (502; 504) axes to pump refrigerant to a discharge plenum (42). The compressor includes a muffler system (200) comprising a sound absorbing first element (232) and a sound absorbing second element (236). The second element at least partially surrounds the first element and defines a generally annular flow path portion (230) between the first element and the second element. A wall (250) at least partially surrounds the second element. A space (259) optionally containing a sound absorbing third element (261) surrounds the wall.

Abstract: A suction system for a refrigerator compressor includes a suction muffler with an outlet tube mounted to a valve plate and a cylinder head having a reinforced portion in the area of the valve plate and the outlet tube.

Abstract: A suction muffler for a small refrigeration system, the muffler including an enclosed equalizing chamber acting upon a tubular connector and a fluid communication between the equalizing chamber and an acoustic chamber. The assembly simultaneously minimizes the noises of gas pulses inside the suction muffler and the pressure differential between the inside and outside of the tubular connector.

Abstract: A muffler installation structure for compressors includes an end plate member fitted to an opening end of a cylinder body, a cup-shaped muffler fitted to the end plate member, and a fixing member for fixing the muffler to the end plate member. At places near the fixing member, an inner peripheral surface of a peripheral wall of the muffler and an outer peripheral surface of a body portion of the end plate member are clearance-fitted to each other. At places distant from the fixing member, on the other hand, the inner peripheral surface of the peripheral wall of the muffler and the outer peripheral surface of the body portion of the end plate member are close-fitted.

Abstract: A muffler for an engine in oilfield applications has a tube with nozzles in its inlet section for spraying a mist of water from the well into the exhaust gases produced by the engine, so that a significant portion of the water is converted to water vapor and exits with the exhaust gases at the outlet of the tube. Vortex generators on the interior surface of the midsection of the tube create turbulence in the exhaust gases and water mist. A sump at the outlet section of the tube collects the remaining water and pollutants trapped by the water for subsequent disposal.

Abstract: A resilient mount useful in a muffler assembly includes a support arm, a bracket arm and at least one resilient portion. In one example, the resilient portion comprises neoprene to provide a cushion between the support arm and the bracket arm. The resilient mount is for supporting at least one absorptive body within a housing and isolating the housing from vibrations of the absorptive body.