A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston.

Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.

A compressor of a refrigeration appliance includes a motor, in particular a BLDC motor, and a controller for stopping the motor. The controller is configured to slow down the motor rotating in a first rotating direction until it comes to a standstill and to subsequently position the rotor relative to the stator, in a second rotating direction with a predetermined torque. A method for stopping a compressor of a refrigeration appliance is also provided.

A linear compressor includes a linear motor in which a mover reciprocates with respect to a stator; a compression unit configured to form a compression space in a cylinder while a piston connected to the mover of the linear motor reciprocates in the cylinder; a plurality of discharge covers in which each discharge space is provided to accommodate refrigerant discharged from the compression space, and the each discharge space is sequentially communicated therewith; and a gas bearing configured to guide part of refrigerant accommodated in a discharge space of any one of the plurality of discharge covers between the cylinder and the piston to lubricate between the cylinder and the piston with the refrigerant, wherein at least part of a discharge cover in contact with the compression unit is exposed to an outside of a discharge space of another discharge cover.

A compressor (22) has: a case (32) defining: a first cylinder bank (70) having a plurality of cylinders (76, 77); a cylinder head (100); a suction port (26); a discharge port (28); and an economizer port (30); a plurality of pistons, each individually associated with a respective one of the cylinders; and a crankshaft (202) held by the case for rotation about a crankshaft axis and coupled to the pistons. The first cylinder bank cylinder head is divided into: a first suction chamber (130); a second suction chamber (132); and a single discharge chamber (128). The first cylinder bank first suction chamber is coupled to the suction port. The first cylinder bank second suction chamber is coupled to the economizer port. The first cylinder bank discharge chamber is coupled to the discharge port.

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.

A reciprocating type compressor includes a crank shaft that is coupled to a rotor of a motor to transfer a rotational force, a piston that compresses a refrigerant while linearly moving within a cylinder of a compression portion, a connecting rod that connects the crank shaft to the piston to convert a rotational force of the crank shaft into a linear motion of the piston, and a cylinder boss integral body in which the cylinder and a boss that encloses the crank shaft are integrally formed at right angles to each other.

A damped compressor used in mobile appliances. The appliances may comprise a compressor which is disposed within a housing and is in fluid communication with a refrigerant system. Within the housing there is an improved damping or stabilizer system which limits movement of electric or mechanical portions, or both, of the compressor within the housing. At startup and shutdown, when oscillations of the components within the housing are generally maximized, the components are limited from contacting the housing internal structure so as to inhibit damage to the compressor and reduce the noise associated with such contact. The components are also damped from movement associated with the mobile application of the compressor.

Embodiments of the present invention reduce the amount of energy required to operate air-conditioners and refrigerators by providing a vapor-compression system that harnesses a low- or no-cost source of energy, namely, heat, and uses the harnessed heat to power a new kind of compressor, called a burst compressor and a new kind of pump, called a vapor pump. The heat-driven burst compressor pressurizes the refrigerant, while also providing push and pull vapor refrigerant to the vapor pump. The vapor pump, actuated by the high pressure refrigerant in gaseous form provided by the burst compressor, is configured to pump a combination of gaseous, vaporous and liquid refrigerant out of the receiver tank and inject that low pressure refrigerant mix into the burst compressor, where it is heated to change the state of the refrigerant to a heated, pressurized gas. Then the heated, pressurized gas is released in bursts into the other components of the vapor compression cycle. Thus, embodiments of the present invention use heat to provide cold. Because of this arrangement, vapor-compression systems constructed and arranged to operate according to embodiments of the present invention are able to provide air-conditioning and/or refrigeration much more efficiently and with much less expense than traditional vapor compression systems for air-conditioning and refrigeration.

A Stirling type cryogenic refrigerator device includes a dual-piston compressor and a pneumatic expander, wherein some of the pneumatic expander is concealed within the body of the dual-piston compressor.