A sealed system, as provided herein, may include a linear compressor, a shell, and a condenser. The linear compressor may include a casing and a piston. The casing may extend along an axial direction from a first end portion to a second end portion. The casing may include a cylinder assembly defining a chamber proximal to the second end portion. The piston may be slidably received within the chamber of the cylinder assembly. The shell may define an internal volume enclosing the linear compressor and lubrication oil therein. The condenser may be in downstream fluid communication with the linear compressor to receive a compressed refrigerant therefrom.

Provided are a linear compressor and a linear compressor control system that do not require a sensor for detecting a position of a mover, and can compute a mover position with high accuracy, in consideration of position dependency of an induced voltage constant. A linear compressor 20 includes a field element 11 having a first end connected to elastic bodies (201a and 201b) and including a permanent magnet 111, an armature 12 having a winding 122 wound around a magnetic pole 121, and a linear motor 10 that causes the field element 11 and the armature 12 to reciprocate relatively in an axial direction. A stroke of a piston is controlled so that a portion where a gradient of an induced voltage when the induced voltage computed on the basis of a voltage command value output to the linear motor 10 and a value of a current flowing through the winding 122 is at a predetermined value is within a predetermined range corresponds to a top dead center and/or a bottom dead center of a stroke of a piston 212 connected to a second end of the field element 11.

The present disclosure relates to a linear compressor. The linear compressor according to an aspect of the present disclosure includes a shell, a cylinder, a piston, and a muffler. Also, an internal space in which at least a portion of the muffler is inserted is formed in the piston, and the muffler is disposed in contact with the inner wall of the piston forming the internal space.

A linear compressor includes a cylinder, a frame, and a discharge unit. The discharge unit includes a discharge cover coupled with the frame, a discharge plenum disposed inside the discharge cover to define a plurality of discharge spaces, and an insulating plenum provided in a shape corresponding to an inner surface of the discharge cover to contact the inner surface of the discharge cover.

The present disclosure relates to a compressor control apparatus and a compressor control method thereof, and more particularly, to a compressor control apparatus for controlling a switching operation of a switching device to control the start-up of a compressor motor and a compressor control method thereof.

A compressor is disclosed. The compressor compressing and discharging a refrigerant sucked inside a cylinder includes a frame configured to support the cylinder, and a discharge cover assembly disposed in front of the frame. A gas layer is formed between the discharge cover assembly and the frame.

Provided is a linear compressor. The linear compressor includes a shell, a compressor body disposed in the shell, and a first support device coupled to a front portion of the compressor body in an axial direction to support the compressor body. The first support device may be disposed between an inner circumferential surface of the shell and the compressor body to support the compressor body in a radial direction.

The present disclosure relates to a novel vapor compression refrigeration system, and the methods of making and using the vapor compression refrigeration system.

A heat pump is disclosed that has a hot displacer section and a cold displacer section with a linear actuator section disposed between the hot and cold displacer sections. By providing the linear actuator section between the displacers, the shafts that couple the actuators in the linear actuator section to their respective displacer is shorter than if the linear actuator section were located at the bottom of the cold displacer. The shorter shaft can be less stiff to avoid buckling. Due to a lesser propensity to cock, there is less friction of the shaft when reciprocating.

A system and method for extraction of cannabis oil from cannabis plant materials by further reducing the temperature of the extraction system effluent, which may be a mixture of solvent, the desired cannabinoids, and/or the undesired non-polar extracted waste from the plant material. This invention improves the extraction process by: 1) enhancing the rapid filtering of the waste material from the process stream, speeding up the overall process, and 2) improving the quality of the product, yielding a purer extract as evidenced, in part, by its lighter (yellow/gold) color as compared to less-pure green/brown extracts.