Abstract: A compressor may include a shell, an end cap, first and second scrolls, and a first fitting member. The end cap extends from an end of the shell. The first scroll is disposed within the shell and includes a first end plate and a first spiral wrap extending from the first end plate. The second scroll is disposed at least partially within the shell and includes a second end plate and a second spiral wrap extending from the second end plate. The first and second spiral wraps cooperate to define fluid pockets therebetween. The fluid pockets are movable from a radially outer position, a radially intermediate position, and a radially inner position. The second end plate includes a capacity-modulation passage in fluid communication with one of the fluid pockets at the radially intermediate position. The first fitting member includes a first mounting surface mounted to a second mounting surface of the second scroll.

Abstract: A vapor-liquid separator includes a first flow path extending between a fluid inlet and a fluid outlet and including a helical portion, a second flow path extending between and fluidly transferring vapor from the first flow path to the vapor outlet and defining a helical portion, and one or more bridges fluidly coupling the first flow path to the second flow. The helical portion of the first flow path causes a reduction in static pressure and an increase in velocity of a fluid flowing through the first flow path and generates a vapor that flows into the second flow path via the one or more bridges. The vapor received within the second flow path is discharged from the vapor outlet and the fluid flowing through the first flow path is discharged from the fluid outlet.

Abstract: A method of determining a composition of a blended working fluid in a climate control system includes detecting a characteristic of a working fluid flowing through a fluid conduit at a location of the fluid conduit using a sensor; calculating a first concentration of a first refrigerant of the blended working fluid at the location; and calculating a second concentration of the second refrigerant of the blended working fluid at the location. The calculating the first concentration of the first refrigerant is based on the characteristic and stored information. The stored information includes a first stored value of the first refrigerant and a second stored value of a second refrigerant. The calculating the second concentration of the second refrigerant is based on the characteristic and the stored information. The calculating is based only upon the characteristic and the stored information.

Abstract: A method of determining a composition of a blended working fluid in a climate control system includes detecting a characteristic of a working fluid flowing through a fluid conduit at a location of the fluid conduit using a sensor; calculating a first concentration of a first refrigerant of the blended working fluid at the location; and calculating a second concentration of the second refrigerant of the blended working fluid at the location. The calculating the first concentration of the first refrigerant is based on the characteristic and stored information. The stored information includes a first stored value of the first refrigerant and a second stored value of a second refrigerant. The calculating the second concentration of the second refrigerant is based on the characteristic and the stored information. The calculating is based only upon the characteristic and the stored information.

Abstract: A refrigeration control system includes: a refrigerant including a blend of a first refrigerant and a second refrigerant; an accumulator; a compressor that receives the refrigerant from the accumulator and compresses the refrigerant; a first heat exchanger disposed downstream of the compressor; a receiver disposed downstream of the first heat exchanger; a first valve disposed between the liquid-to-suction heat exchanger and the receiver; a second valve disposed between the receiver and a second heat exchanger, the second heat exchanger, where the second heat exchanger receives the refrigerant from the second valve and at least partially vaporizes the refrigerant and outputs the at least partially vaporized refrigerant to the liquid-to-suction heat exchanger; and a control module configured to selectively adjust a speed of the compressor based on adjusting (a) a temperature of air output from the second heat exchanger and into a space toward (b) a setpoint temperature within the space.

Abstract: A refrigeration control system includes: a refrigerant including a blend of a first refrigerant and a second refrigerant; an accumulator; a compressor that receives the refrigerant from the accumulator and compresses the refrigerant; a first heat exchanger disposed downstream of the compressor; a receiver disposed downstream of the first heat exchanger; a first valve disposed between a liquid-to-suction heat exchanger and the receiver; a second valve disposed between the receiver and a second heat exchanger, wherein the second heat exchanger receives the refrigerant from the second valve and at least partially vaporizes the refrigerant and outputs the at least partially vaporized refrigerant to the liquid-to-suction heat exchanger; and a control module configured to selectively adjust a speed of the compressor based on adjusting (a) a temperature of air output from the second heat exchanger and into a space toward (b) a setpoint temperature within the space.

Abstract: An antirotation valve system for controlling flow through a valve opening defined in a compressor surface. The antirotation valve system includes a reed and a backer each having one mounting opening and one antirotation feature.

Abstract: A method of controlling a CO2 refrigeration system includes obtaining a target exit pressure of refrigerant from a gas cooler/condenser, a measurement of a pressure of the flash tank, and an open percentage of a bypass valve (BGV). Whether or not to decrease the pressure of the flash tank is determined, based at least in part on the pressure of the flash tank and the open percentage of the BGV. When the controller determines to decrease the pressure of the flash tank, the target exit pressure is increased by an amount.

Abstract: A climate-control system may include first and second turbomachines, first and second heat exchangers, and a fan. The first turbomachine may be fluidly connected with a source of outdoor air. The first and second turbomachines are operable in a compressor mode and in an expander mode. The turbomachines compress air in the compressor mode and expand air in the expander mode. The first heat exchanger may receive air from the first turbomachine. The second heat exchanger may be fluidly connected to the first heat exchanger and the second turbomachine. The fan may force air across an exterior of the first heat exchanger and force air across an exterior of the second heat exchanger. The air flowing across the exteriors of the first and second heat exchangers may be fluidly isolated from air flowing inside of the first and second heat exchangers.

Abstract: A compressor includes a shell, a compression mechanism, a driveshaft operable to drive the compression mechanism to compress a fluid, and a ring-shaped counterweight assembly positioned on the driveshaft. The counterweight assembly includes a counterweight fixed on the driveshaft and a cover attached to the driveshaft via a snap fit connection. The counterweight includes a coupling ring and a main weight having an arcuate shape, the coupling ring defining a bore receiving the driveshaft to fix the counterweight on the driveshaft. The counterweight and the cover cooperate to define the counterweight assembly, the cover extending circumferentially between two cover end surfaces each positioned adjacent one of two circumferential main weight end surfaces to define a disk-shape of the counterweight assembly. The cover includes a coupling collar including a circular base and flexible fingers engageable with a circumferential groove defined on the driveshaft to form the snap fit connection.

Abstract: A centrifugal compressor includes a compressor housing, a motor and a rotatable shaft. A bearing housing defines a center bore that receives the shaft, and a volute assembly is positioned in the socket adjacent the bearing housing. The volute assembly has a back axial surface facing the bearing housing, stops protruding from the back axial surface. The stops abut the datum to limit tolerance stack between the bearing housing and the volute assembly. Each of the bearing housing and the volute assembly are secured to the datum.

Abstract: An air treatment system includes a three-way heat exchanger, a heat transfer fluid loop, and a pre-treatment heat exchanger positioned on the heat transfer fluid loop. The three-way heat exchanger is operable to transfer heat and moisture between air, a liquid desiccant, and a heat transfer fluid. The heat transfer fluid loop circulates the heat transfer fluid between the three-way heat exchanger and a second heat exchanger operable to transfer heat between the heat transfer fluid and a third working fluid. The pre-treatment heat exchanger is positioned on the heat transfer fluid loop between the second heat exchanger and the three-way heat exchanger and is operable to transfer heat between the air and the heat transfer fluid upstream from the three-way heat exchanger.

Abstract: A compressor system includes a compressor housing, a shaft rotationally supported within the compressor housing, a first impeller operably connected to the shaft at a first end, a second impeller operably connected to the shaft at a second end, a motor operably connected to the shaft, and a cooling circuit. The cooling circuit includes a coolant inlet passage for introducing an inlet coolant flow into the cooling circuit, and a cooling channel connected in fluid communication with the coolant inlet passage. The cooling channel extends helically around the motor and includes a first portion and a second portion. Each of the first portion and the second portion extends from the coolant inlet passage to respective first and second outlets such that the inlet coolant flow is split into a first coolant flow along the first portion and a second coolant flow along the second portion.

Abstract: A conditioning system includes a vapor compression system and a humidity control system. The vapor compression system includes an evaporator, a condenser, a first fan that produces a first airflow across the evaporator toward a conditioned interior space, and a second fan that produces a second airflow from the condenser toward an exterior space. The humidity control system includes a first mass exchange device positioned in the first airflow, a second mass exchange device positioned in the second airflow, and a heat exchanger in fluid communication with both mass exchange devices. The heat exchanger includes a first path and a second path that are thermally coupled and that provide liquid desiccant between the first and second mass exchange devices. The first and second mass exchange devices each include a plurality of cavities configured to permit liquid desiccant to flow therethrough.

Abstract: A method includes commanding a motor coolant control valve to open at a first time to provide a supply of coolant to a motor coolant flow channel that delivers coolant to a motor of a compressor. A first detection of a coolant return temperature is received at a first time from a temperature sensor connected to a coolant return line that receives coolant from the motor coolant flow channel and returns coolant to another portion of the compressor. A second detection of the coolant return temperature from the temperature sensor is received at a second time after the first time. Based on the first detection and the second detection of the coolant return temperature, it is determined if the motor coolant control valve opened at the first time, and remedial action is taken when the motor coolant control valve is determined not to have opened at the first time.

Abstract: A compressor system including a cooling circuit including a first coolant inlet passage defined by a compressor housing for introducing a first coolant flow into the cooling circuit and a second coolant inlet passage defined by the compressor housing for introducing a second coolant flow into the cooling circuit. The cooling circuit includes a cooling channel defined by the compressor housing and connected in fluid communication with the first and second coolant inlet passages. The cooling channel extends helically around a motor and includes a first portion and a second portion. The first portion extends from the first coolant inlet passage to a first outlet and the second portion extends from the second coolant inlet passage to a second outlet such that the first coolant flow travels along the first portion and the second coolant flow travels along the second portion.

Abstract: Climate control systems and methods of operating them are provided that circulate a working fluid including a high glide refrigerant blend having first and second refrigerants with a difference in boiling points ?about 25° F. at atmospheric pressure. The first refrigerant comprises carbon dioxide. The system includes a gas-liquid separation vessel, where a compressor receives the vapor stream and generates a pressurized vapor stream. A liquid pump receives the liquid stream and generates a pressurized liquid stream. A condenser is disposed downstream of the compressor and liquid pump and receives and cools the pressurized mixed vapor and liquid stream. An evaporator receives and at least partially vaporizes the multiphase working fluid and directs it to the gas-liquid separating vessel. An expansion device between the condenser and the evaporator processes the multiphase working fluid stream. Lastly, a fluid conduit for circulating the working fluid through the components is provided.

Abstract: A refrigeration system includes a main fluid loop and a secondary fluid loop. The main fluid loop includes a compressor and a heat exchanger that circulate a first working fluid. The secondary fluid loop circulates a second working fluid. The secondary fluid loop is in thermal communication with the main fluid loop at the heat exchanger. The secondary fluid loop includes a pump, a thermal energy storage, and a coil fluid line. The secondary fluid loop includes a multi-position valve configured to move between positions that selectively fluidly connect the heat exchanger, the pump, the thermal energy storage, and the coil fluid line.

Abstract: A compressor may a first scroll, a second scroll, and a valve assembly. The second scroll may include a discharge passage. The valve assembly may include a valve housing fixed relative to the second scroll and a valve member movably received in the valve housing. The valve housing may include a plurality of angled apertures that are angled relative to a direction in which the valve member moves between the open and closed positions. The valve member is movable relative to the valve housing and valve retainer between an open position and a closed position. When the valve member is in the open position, fluid is allowed to flow through the discharge passage and the angled apertures in the valve housing. When the valve member is in the closed position, fluid flow through the discharge passage and the angled apertures is restricted.