The present disclosure relates to a compressor including a case, a compression unit provided inside the case, and a driving unit, wherein the compression unit includes a cylinder having a compression space, a piston reciprocating inside the cylinder, a discharge cover covering the compression space, a first plenum disposed inside the discharge cover and having a discharge space and a coupling space, a second plenum disposed inside the discharge cover and defining a movement channel through which refrigerant moves, a rib disposed in the movement channel, and a communicating portion through which the discharge space and the movement channel communicate with each other, wherein the refrigerant discharged from the compression space moves along the discharge space, the communicating portion, and the movement channel, whereby pulsation caused by the discharge of the refrigerant can be reduced.

A linear compressor includes a shell, a motor in the shell, a mover coupled to the motor and configured to perform a reciprocating motion in an axial direction, a cylinder disposed in the shell, a piston coupled to the mover and configured to reciprocate in the cylinder, a spring that supports the piston in the axial direction, and a spring cap inserted into an end portion of the spring. The spring cap defines a space portion that is defined inside the spring cap and has a volume separate from the inner space of the shell, and a passage portion that extends through an axial side surface of the spring cap and is configured to provide communication between the space portion and the inner space of the shell.

A compressor includes: a case, a compression unit that is provided inside the case and that includes a cylinder and a piston configured to reciprocate inside the cylinder to compress refrigerant, a driving unit that includes a stator disposed inside the case and a plurality of permanent magnets configured to reciprocate with respect to the stator and that is configured to provide a driving force to the compression unit, and a resonator that is configured to reduce noises generated while the compression unit is operated, that is disposed between the compression unit and an inner surface of the case facing the compression unit in an axial direction, and that is spaced apart from the compression unit.

A discharge chamber, into which refrigerant compressed by a compression mechanism, is discharged, is formed in an inside of a housing. A resonator is connected to an intermediate portion of a communication passage, which communicates between the discharge chamber and a discharge port of the housing. The resonator includes a resonance chamber and an inlet passage. The inlet passage has one end portion, which is connected to the intermediate portion of the communication passage, and another end portion, which is connected to the resonance chamber.

Suction muffler (1) for a hermetic refrigeration compressor (2), the suction muffler (1) comprising an inlet (3), so that refrigerant can flow into the suction muffler (1), and an outlet (4), so that refrigerant can flow out from the suction muffler (1), the suction muffler (1) further comprising two damping chambers (5, 6) for sound damping, where the two damping chambers (5, 6) each has a floor (8, 9) and where a wall element (11) is provided, in order to separate the two damping chambers (5, 6) from each other for the refrigerant in the region of their floors (8, 9). In order to guarantee that the damping chambers (5, 6) are overall as gas-tight and sound-tight as possible, it is provided according to the invention that in the region of the wall element (11) at least one siphon segment (16) that connects the two floors is disposed, in order to receive oil (14) in an operating position of the suction muffler (1), where the at least one siphon segment (16) connects the two damping chambers (5, 6) in siphon fashion to each other for the oil (14).

A compressor system and a method of reducing noise in the compressor system. The compressor system includes an inlet port configured to receive gas, an outlet port configured to output compressed gas, and a compressor pump connected to the inlet port via a pneumatic line and to the outlet port. The compressor pump is configured to pressurize gas input through the inlet port and to output a compressed gas through the outlet port. The compressor pump generates noise during operation of the compressor pump. The compressor system further comprises a side-branch resonator having a housing forming a cavity and an elongated member connected to the housing. The elongated member is pneumatically connected to the pneumatic line between the inlet port and the compressor pump. The side-branch resonator is configured to substantially reduce noise generated by the compressor pump, to monitor an operation of the compressor pump, or both.

A linear compressor includes a shell, a motor in the shell, a mover coupled to the motor and configured to perform a reciprocating motion in an axial direction, a cylinder disposed in the shell, a piston coupled to the mover and configured to reciprocate in the cylinder, a spring that supports the piston in the axial direction, and a spring cap inserted into an end portion of the spring. The spring cap defines a space portion that is defined inside the spring cap and has a volume separate from the inner space of the shell, and a passage portion that extends through an axial side surface of the spring cap and is configured to provide communication between the space portion and the inner space of the shell.

A linear compressor includes: a shell including an intake pipe configured to suction a refrigerant, a piston including a piston body, an intake muffler including a first muffler that includes a first muffler body defining a main flow passage and a first muffler flange extending in a radial direction from the first muffler body, and at least one auxiliary flow passage disposed between an outer peripheral surface of the first muffler body and an inner peripheral surface of the piston body and configured to guide the refrigerant remaining between the first muffler body and the piston body to an outside of the piston. A cross-sectional area of the at least one auxiliary flow passage is less than a cross-sectional area of an inlet hole provided at a rear end of the main flow passage and greater than or equal to 10% of the cross-sectional area of the inlet hole.

A vacuum pump is provided that includes a body, a first cylinder at least partially inside the body, a second cylinder at least partially inside the body, and an electric drive motor attached to the body and driving a common crank pin. The first cylinder has a first cylinder axis, and a first piston is reciprocal in the first cylinder. A first piston rod is attached to the first piston. The second cylinder has a second cylinder axis, and a second piston is reciprocal in the second cylinder. A second piston rod is attached to the second piston. The first and second cylinder axes are arranged at substantially 90° to each other. The first and second piston rods engage the common crank pin such that the first piston and the second piston are commonly driven by the common crank pin.

The invention concerns a suction silencer (1) for an encapsulated refrigerant compressor, with an inlet (5), an outlet (6), a damping chamber (7) connecting the inlet (5) and the outlet (6) for sound attenuation, and an equalization chamber connected to the damping chamber (7) for equalizing the pressure of the damping chamber (7), wherein the suction silencer (1) is provided in the operating position for integration in a compressor housing (20) of the refrigerant compressor having a bottom area (21) for reception of an oil sump (26). To ensure a continuous pressure equalization between the damping chamber (7) and the environment even during start-up of the refrigerant compressor, it is intended in accordance with the invention that the equalization chamber is designed as a first equalization chamber (11) with a first opening (9) for pressure equalization and the suction silencer (1) has a further, second equalization chamber (14) with a second opening (10) for pressure equalization.