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 the technical field of cryogenic cooling. In particular, the present disclosure relates to a mechanical vibration-isolated, liquid helium consumption-free cryogenic cooling device. The system according to some embodiments of the present disclosure comprises: a closed-cycle cryogenic cooling system, a helium heat exchange gas cooling and vibration isolation interface system, a cryogenic throttle valve cooling system, and a temperature feedback control system. The closed-cycle cooling system includes a cold head, a compressor, and a helium pipeline. The cryogenic throttle valve cooling system is thermally coupled to a low-temperature end of the cooling and vibration isolation interface.

A heat station for a GM or Stirling cycle expander provides a versatile, efficient, and cost effective means of transferring heat from a remote load at cryogenic temperatures that is cooled by a circulating cryogen to the gas in a GM or Stirling cycle expander as it flows between a regenerator and a displaced volume. The heat exchanger comprises a shell that has external and internal fins thermally connected to it that are aligned parallel to the axis of the shell and enclosed in a housing having an inlet port and an outlet port on the bottom of the housing.

A heat station for a GM or Stirling cycle expander provides heat transfer from a remote load at cryogenic temperatures that is cooled by a circulating cryogen to the gas in a GM or Stirling cycle expander as the cryogen between a regenerator and a displaced volume. The heat exchanger includes a shell that has external and internal fins thermally connected to the shell that are aligned parallel to the axis of the shell and enclosed in a housing having an inlet port and an outlet port on the bottom of the housing.

A cryocooler includes: a magnetic shield axially extending along a second-stage cylinder from a second-stage cooling stage outside the second-stage cylinder and disposed separated from a first-stage cooling stage by an axial separation distance, wherein an annular space open to a helium atmosphere is formed between the second-stage cylinder and the magnetic shield, and the axial depth of the annular space is longer than the axial separation distance; and a convection suppression member, for suppressing axial convection of helium gas in the annular space caused by temperature difference between the second-stage cylinder and the magnetic shield, is disposed in the annular space and is of longer axial length than the axial separation distance.

A cryocooler includes an attachment flange including a refrigerant gas introduction port through which refrigerant gas is introduced into a recondensing chamber from an ambient temperature environment, and attachable to the recondensing chamber, and a cooling stage that is disposed inside the recondensing chamber when the attachment flange is attached to the recondensing chamber. The refrigerant gas introduction port is perpendicularly or obliquely oriented with respect to an axial direction of the cryocooler so that a refrigerant gas flow exiting the refrigerant gas introduction port deviates from the cooling stage.

A cooling device implementing a stirling-type thermodynamic cycle includes a compressor with a reciprocating piston driven by an electric motor rotating about an axis via a crankshaft. The electric motor comprises an internal stator and an external rotor and is connected to the crankshaft via a link with at least one degree of freedom in rotation about the axis of the electric motor.

A single piston (1), rotary displacer (2), heat cycle/transfer engine, using a fixed volume of working fluid, in a single L shape tubular chambered (10), three zone (7)(8)(9), sealed housing (3). The rotary displacer (2) consists of a displacer cam (4) and a crank shaft (5) supported by a variable number of rotary bearings (6), the number and type of which depends on the size and rotational speed of the completed unit. The sealed housing (3), consisting of three zones, where one faces a heat source side (7), one acts an insulating barrier (8) and one acts as a heat sink (9). Movement of the rotary displacer (2) transports the contained working fluid to the exposed surfaces of the heat source side (7) and the heat sink (9) sequentially, while the incorporated crank shaft (5) drives the single piston (1), via a connecting rod (11), which allows for the manipulation of the corresponding expansion and contraction of the working fluid. The engine can use the transfer of heat, the Carnot Heat Cycle, to generate rotational (or linear) power or act as a heat pump/refrigeration unit. When used to produce rotational power, the initial rotational energy may be provided by a loop of Nitinol (12) or similar shape memory alloy to avoid a stall caused by the working fluid being exposed to the heat source side and heat sink side equally. The Nitinol loop (12) may ride on a second shape memory alloy ring (14), which allows it to disengage at higher temperatures and rotational speeds, effectively acting as a clutching mechanism. The invention is scalable to include nano-devices and micro electromechanical systems (MEMS), through large scale heat recovery systems.

A linear compressor according to the present disclosure may include a cylinder provided with at least one groove, a piston reciprocating within the cylinder, a motor configured to provide a driving force to move the piston within the cylinder, an inverter configured to perform a switching operation to transmit electric power to the motor, and a controller configured to receive temperature information from the electronic device and control the inverter to preheat the motor based on the received temperature information.

A cryocooler includes a second-stage cooling stage, a second cylinder which includes the second-stage cooling stage on a terminal of the second-stage cylinder, a second-stage displacer which includes a magnetic regenerator material and is accommodated in the second-stage cylinder so as to be able to reciprocate in the second-stage cylinder, and a tubular magnetic shield which is installed on the second-stage cooling stage and extends along the second-stage cylinder outside the second-stage cylinder. The magnetic shield is formed of a normal conductor and a product of an electrical conductivity in a temperature range of 10 K (Kelvin) or less and a thickness of the tubular magnetic shield is 60 MS (Mega-Siemens) to 1980 MS.