A chiller system is provided and includes a chiller, a lubrication assembly and a controller. The chiller includes a compressor, a condenser, an expansion assembly and an evaporator in fluid communication with one another. The lubrication assembly is operably coupled to the compressor, the condenser and the evaporator and is formed to define first-third pathways via a three-way valve and a fourth pathway. The first pathway is configured for pumping refrigerant through the chiller, the second pathway is configured for pre-storing refrigerant in the chiller, the third pathway is configured for removing refrigerant from the chiller and the fourth pathway is configured for charging refrigerant into the chiller. The controller is configured to control the lubrication assembly to selectively engage one of the first-fourth pathways.

A refrigerant and oil treatment composition for introduction into a vapor-compression system such as a refrigerator, heat pump, freezer, air conditioner, thermal control device, and refrigerant recovery apparatus has a composition alcohol and a drying agent. The drying agent is 2,2-dimethoxypropane which can react with moisture in the system to form an alcohol as a reaction product. The alcohol reaction product along with the composition alcohol separates any acid in the system from oil, refrigerant and hard surfaces of the system to form an acid-containing solvent composition. The quantity of the composition introduced into the system is based on the adsorption capacity of the filter-drier.

A centrifugal compressor includes a casing, an inlet guide vane, an impeller, a motor, a diffuser and a cooling medium delivery structure. The motor includes a rotor mounted on the shaft and a stator disposed radially outwardly of the rotor to form a gap between the rotor and the stator. The cooling medium delivery structure includes inlet and outlet conduits located to supply and discharge a cooling medium to and from the motor. The shaft has an external shape different than an internal shape of the rotor to form at least one axial passageway between the shaft and the rotor. The cooling medium is supplied through the gap and the at least one axial passageway to cool the rotor.

The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF.sub.3I) for use in a heat exchange system, including air conditioning and refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-410A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-410A.

A printed board on which a power module is mounted, a cooling pipe that is a refrigerant pipe of a refrigerant circuit, and a cooler attached to the power module and the cooling pipe are disposed in a casing. A support member by which the cooler is attached to the printed board and supported on the printed board, and a fixing member by which the printed board is fixed to the casing and supported on the casing are used.

Disclosed is an integrated compressor system configured to be integrated with existing air conditioning systems. The integrated compressor system generally includes a mounting assembly, a first compressor and a valve. The mounting assembly can be mounted directly on a condenser of an existing air conditioning system. The first compressor and the valve are mounted directly on the mounting assembly. The valve has a first valve inlet, a second valve inlet and a valve outlet. When assembly and integrated with an existing AC system, the first valve inlet is fluidly coupled to a compressor outlet of the first compressor, the second valve inlet is fluidly coupled to a compressor outlet of the compressor of existing AC system, and a valve outlet is fluidly connected to a condenser inlet of the condenser.

Disclosed is an integrated compressor system configured to be integrated with existing air conditioning systems. The integrated compressor system generally includes a mounting assembly, a first compressor and a valve. The mounting assembly can be mounted directly on a condenser of an existing air conditioning system. The first compressor and the valve are mounted directly on the mounting assembly. The valve has a first valve inlet, a second valve inlet and a valve outlet. When assembly and integrated with an existing AC system, the first valve inlet is fluidly coupled to a compressor outlet of the first compressor, the second valve inlet is fluidly coupled to a compressor outlet of the compressor of existing AC system, and a valve outlet is fluidly connected to a condenser inlet of the condenser.

A system includes a high side heat exchanger, a flash tank, a compressor, and eight metal beams. Each of the metal beams extend in a linearly vertical direction. The eight metal beams define ten planar boundaries. The first, second, third, and fourth planar boundaries define a first space. The first, fifth, sixth, and seventh planar boundaries define a second space. The fifth, eighth, ninth, and tenth planar boundaries define a third space. The high side heat exchanger is contained entirely within the third space. The flash tank is contained entirely within the first space. The compressor is contained entirely within the second space.

A system includes a high side heat exchanger, a flash tank, a compressor, and eight metal beams. Each of the metal beams extend in a linearly vertical direction. The eight metal beams define ten planar boundaries. The first, second, third, and fourth planar boundaries define a first space. The first, fifth, sixth, and seventh planar boundaries define a second space. The fifth, eighth, ninth, and tenth planar boundaries define a third space. The high side heat exchanger is contained entirely within the third space. The flash tank is contained entirely within the first space. The compressor is contained entirely within the second space.

A scroll compressor includes fixed and movable scrolls, and a drive part. The fixed scroll has a fixed-side end plate, a fixed-side lap, and a thrust sliding portion surrounding the first lap. The movable scroll has a movable-side end plate and a movable-side lap. The drive part revolves the movable scroll so that refrigerant in a compression chamber formed by the fixed-side lap and movable-side lap is compressed. A back-pressure space which communicates with the compression chamber for at least a prescribed period in a revolution cycle is formed at the back face side of the movable scroll. A first oil channel supplied with oil from a space is formed in a first angle region of the fixed-side end plate. A communication channel formed in a second angle region communicates with the compression chamber. A second oil channel communicating with the back-pressure space is formed in the second angle region.