A refrigeration system and a refrigeration device are provided. The refrigeration system includes a circulation circuit. The circulation circuit includes a main flow path, and a first branch and a second branch that are connected to the main flow path and are connected in parallel. The main flow path is provided with a condenser and a compressor. The condenser has an output end in communication with an end of the first branch and an end of the second branch. The compressor has two suction holes in communication with another end of the first branch and another end of the second branch, respectively. The first branch and the second branch are provided with a first evaporator and a second evaporator, respectively.

A rotary compressor includes: a case; a cylinder inside the case and has an internal space, and which includes a rolling piston configured to eccentrically rotate in the internal space, a vane in contact with the rolling piston such that while the vane is in contact with the rolling piston, the internal space of the cylinder is divided into a suction chamber and a compression chamber, a suction port to allow refrigerant to flow to the suction chamber, and a discharge port to allow the refrigerant to be discharged the compression chamber; a drive device that includes a rotation shaft connected to the rolling piston and a motor configured to rotate the rotation shaft; and a valve member that is fixed to a side surface of the vane and selectively opens and closes the discharge port as the vane reciprocates back and forth.

A linear compressor and a refrigerator including a linear compressor are provided. The linear compressor may include a shell coupled to a suction inlet, through which a refrigerant may be introduced, and a discharge outlet, through which the refrigerant may be discharged, a cylinder disposed within the shell to accommodate a piston reciprocated to compress the refrigerant introduced through the suction inlet, a frame that accommodates the cylinder, the frame being mounted inside the shell, and a discharge cover coupled to a front surface of the frame to discharge the refrigerant compressed by the piston to the discharge outlet. A front surface of the cylinder that faces the discharge cover may be spaced a predetermined distance from the discharged cover.

A linear oscillation system comprising a housing, a stationary assembly, a moveable assembly and a suspension system is disclosed. The suspension system is mechanically coupled between the moveable assembly and the housing. The suspension system comprises a plurality of planar elastic members and plurality of longitudinal elastic members disposed between the plurality of planar elastic members. A first end of each of the plurality of planar elastic members is mechanically coupled to at least one of the plurality of planar elastic members. A second end of each of the plurality of longitudinal elastic members is mechanically coupled to the housing.

A hermetic compressor includes, inside hermetic container (1), electric motor element (2), compression element (3) driven by electric motor element (2), and lubricating oil (7) for lubricating compression element (3). The hermetic compressor further includes vibration damping member (16) having one part fixed to hermetic container (1) and another part being free end part (18). Structurally, a natural frequency of vibration damping member (16) is in substantial conformity with a natural frequency of hermetic container (1).

A sealed system for an appliance includes a compressor having a shell and lubrication oil disposed with the shell. A condenser in fluid communication with the compressor such that compressed refrigerant from the compressor flows to the condenser during operation of the compressor. The sealed system also includes a heat exchanger for cooling the lubrication oil during operation of the compressor.

The present subject matter provides a linear compressor. The linear compressor includes a coupling that extends between an inner back iron assembly and a piston. The coupling includes a shaft and a ball seat mounted to the shaft at an end portion of the shaft. A ball is positioned on the ball seat at a seating surface of the ball seat. A ball shoe is positioned opposite the ball seat about the ball, and the ball is positioned on the seating surface of the ball shoe. A spring urges the ball shoe against the ball.

A compressor (10), in particular a compressor for compressing a coolant, including one or more pistons (12), a cylinder block (16), and a compressor housing which at least partially houses the compressor (10), the piston(s) (12) being arranged in corresponding cylinder bores or cylinders (14) arranged at least partially in the cylinder block (16) and/or in the compressor housing so that they can move back and forth. The compressor (10) also includes an impedance tube (36) and an outlet (30) for releasing the coolant from the compressor, (10) in particular an outlet flange (32). Said compressor (10) has an associated high pressure volume (24), for one or more, in particular, for respectively two cylinders (14), and a common high pressure volume (26), in which the individual high pressure volumes (24) join, the common high pressure volume (26) being connected to the outlet (30) and the impedance tube (36) being arranged in the connection between the common high pressure volume (26) and the outlet (30) or the connection is created between the common high pressure volume (26) and the outlet (30). The invention also relates to a corresponding coolant circuit and to a corresponding air-conditioning system.

Disclosed are a compressor applied to a refrigerator not having a cycle matching function or a refrigerator not including a controller, and capable of controlling a driving of a linear motor by the compressor itself, and a method for controlling the same. The compressor installed at an apparatus including a refrigeration cycle includes: a piston which reciprocates in a cylinder; a linear motor configured to provide a driving force to move the piston; a sensor configured to sense a motor current of the linear motor; and a compressor controller configured to detect information related to a load of the apparatus, in a separated manner from a controller which controls a body of the apparatus, wherein the compressor controller calculates a phase difference between a stroke of the piston and the sensed motor current, and wherein the compressor controller controls a driving of the linear motor in correspondence to the detected load, such that the calculated phase difference is within a range of a reference phase difference.

In order to make a refrigerant compressor unit as light and compact as possible so that it can be used as a transcritical CO2 compressor, it is proposed that the cylinder head is manufactured from a cast material comprising iron and that the housing sleeve, the compressor housing portion and a cylinder housing block, which accommodates the cylinders, as well as the motor housing portion form a single-piece part, in particular made of lightweight material.