A climate-control system may include first and second compressors and a suction manifold. The first compressor includes a first shell, a first compression mechanism, and a first suction inlet through which working fluid is drawn into the first compressor. The second compressor includes a second shell, a second compression mechanism, and a second suction inlet through which working fluid is drawn into the second compressor. The suction manifold includes first and second arms. The first arm provides working fluid to the first suction inlet. The second arm provides working fluid to the second suction inlet. The second arm includes a first suction pipe, a second suction pipe, and a suction valve. The suction valve is movable between a first position in which working fluid is allowed to flow through the first suction pipe and a second position in which working fluid is allowed to flow through the second suction pipe.
F25B 41/48 - Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow path resistance control on the downstream side of the diverging point, e.g. by an orifice
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
2.
MULTIPLE-COMPRESSOR SYSTEM WITH OIL BALANCE CONTROL
A climate-control system may include first and second compressors and a suction manifold. The first compressor includes a first shell, a first compression mechanism, and a first suction inlet through which working fluid is drawn into the first compressor. The second compressor includes a second shell, a second compression mechanism, and a second suction inlet through which working fluid is drawn into the second compressor. The suction manifold includes first and second arms. The first arm provides working fluid to the first suction inlet. The second arm provides working fluid to the second suction inlet. The second arm includes a first suction pipe, a second suction pipe, and a suction valve. The suction valve is movable between a first position in which working fluid is allowed to flow through the first suction pipe and a second position in which working fluid is allowed to flow through the second suction pipe.
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F25B 1/10 - Compression machines, plants or systems with non-reversible cycle with multi-stage compression
F16N 29/02 - Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems for influencing the supply of lubricant
A compressor may include a compression mechanism and an oil pump. The compression mechanism is configured to compress a working fluid. The oil pump may be defined by a driveshaft and a bearing. The driveshaft is drivingly connected to the compression mechanism and includes a lubricant passage. The bearing receives a portion of the driveshaft and includes a bearing surface that rotatably supports the driveshaft. The bearing includes a pump cavity surface that is spaced apart from the driveshaft and cooperates with a diametrical surface of the driveshaft to define a pump cavity that extends around the diametrical surface of the driveshaft. The bearing includes an inlet passage and an outlet passage. The inlet passage receives oil from an oil sump and provides oil to the pump cavity. The outlet passage receives oil from the pump cavity and provides oil to the lubricant passage of the driveshaft.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A climate-control system may include a compressor, a thermal storage device, an outdoor heat exchanger, an indoor heat exchanger, a first expansion device, and a second expansion device. The compressor may include an intermediate-pressure inlet, an intermediate-pressure outlet, a discharge outlet, a suction-pressure pocket, and a plurality of compression pockets. The thermal storage device may include a conduit and a phase-change material surrounding the conduit. The first expansion valve, the second expansion valve, the outdoor heat exchanger, the indoor heat exchanger, and the thermal storage device may be in fluid communication with the compressor. The climate-control system is operable in a charging mode and a discharging mode, and is operable in a cooling mode and a heating mode. The thermal storage device may be configured to absorb heat from a working fluid or to transfer heat to the working fluid.
A system includes: a refrigerant compressor including an electric motor; a single printed circuit board (PCB); a drive that is disposed on the single PCB and that includes switches that control the application of power from a battery to the electric motor; and one or more processors disposed on the single PCB, the one or more processors configured to: determine a speed command for the refrigerant compressor based on one or more operating parameters; and actuate the switches of the drive based on the speed command.
B60P 3/36 - Vehicles adapted to transport, to carry or to comprise special loads or objects comprising living accommodation for people, e.g. caravans, camping, or like vehicles - Details
A heating system of a building includes: a solar heater configured to receive sunlight and to at least one of absorb heat into a refrigerant and augment heat absorbed into the refrigerant; a compressor configured to compress the refrigerant that vaporized via absorption of heat; a first heat exchanger configured to transfer heat from the refrigerant to water; an expansion valve configured to reduce at least one of a temperature and a pressure of the refrigerant after the transfer of heat from the refrigerant to water; a second heat exchanger configured to transfer heat from water output from the first heat exchanger to air passing the second heat exchanger before flowing into the building; a pump configured to pump the water from the solar heater to the second heat exchanger; and a blower configured to blow air past the second heat exchanger and into the building.
F25B 27/00 - Machines, plants or systems, using particular sources of energy
F25B 29/00 - Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
F01K 25/08 - Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
H02J 7/32 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover
A compressor may include a shell assembly, first and second scrolls, a floating seal assembly, a modulation-valve ring, and a modulation-control-valve assembly. The shell assembly may define a suction-pressure region. The first scroll may include a discharge passage, a modulation port, and a biasing passage. The modulation-valve ring may cooperate with the floating seal assembly and the first scroll to define an axial-biasing chamber in fluid communication with the biasing passage. The modulation-valve ring may be axially displaceable between a closed position to close the modulation port and an open position to open the modulation port. The modulation-control-valve assembly may be mounted to the modulation-valve ring and may be movable between a first position corresponding to the closed position and a second position corresponding to the open position.
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor may include a shell assembly, first and second scrolls, a floating seal assembly, a modulation-valve ring, and a modulation-control-valve assembly. The shell assembly may define a suction-pressure region. The first scroll may include a discharge passage, a modulation port, and a biasing passage. The modulation-valve ring may cooperate with the floating seal assembly and the first scroll to define an axial-biasing chamber in fluid communication with the biasing passage. The modulation-valve ring may be axially displaceable between a closed position to close the modulation port and an open position to open the modulation port. The modulation-control-valve assembly may be mounted to the modulation-valve ring and may be movable between a first position corresponding to the closed position and a second position corresponding to the open position.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
9.
SYSTEM AND METHOD FOR EXTENDING THE OPERATING RANGE OF A DYNAMIC COMPRESSOR
A system includes a dynamic compressor and a controller having a processor and a memory. The compressor includes a first compressor stage having a first variable inlet guide vane (VIGV) and a second compressor stage having a second VIGV. The memory stores instructions that program the processor to operate the compressor at a current speed, a first position of the first VIGV, and a second position of the second VIGV to compress the working fluid, and to determine if a condition is satisfied. If the condition is not satisfied, the processor is programmed to continue to operate the compressor at the current speed, the first position of the first VIGV, and the second position of the second VIGV. If the condition is satisfied, the processor is programmed to change the second position of the second VIGV to a third position and maintain the first position of the first VIGV.
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.
F24F 3/147 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification with both heat and humidity transfer between supplied and exhausted air
11.
Motor Drive Control Including Varying DC Bus Voltages, Converter and Inverter Switching Frequencies, And Motor Speed For Thermal Mitigation
In other features, a refrigeration system is provided and includes a compressor motor, an inverter, a converter and a control module. The inverter is configured to convert a direct current (DC) bus voltage to an alternating current (AC) voltage and supply the AC voltage to the compressor motor. The converter is configured to convert a DC input voltage to the DC bus voltage. The control module is configured to obtain a parameter and in response to the parameter exceeding a predetermined threshold, reduce the DC bus voltage and at least one of (i) reduce a switching frequency, (ii) increase an amount of negative d-axis current of the compressor motor, or (iii) reduce a speed of the compressor motor.
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
H02P 29/68 - Controlling or determining the temperature of the motor or of the drive based on the temperature of a drive component or a semiconductor component
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
F25B 31/02 - Compressor arrangements of motor-compressor units
12.
CO-ROTATING SCROLL COMPRESSOR HAVING SYNCHRONIZATION MECHANISM
A compressor includes a shell, a first compression member, a bearing housing and a second compression member. The first compression member is rotatable relative to the shell about a first axis. The bearing housing is coupled to the first compression member and rotatable relative to the shell about the first axis. The bearing housing includes a first pin that extends therefrom. The second compression member is rotatable relative to the shell about a second axis. The second compression member includes a base plate and an arcuate-shaped first pin pocket. The first pin pocket is formed in the base plate and receives the first pin. The first compression member is moveable between a first position in which the first pin is engaged with a surface of the first pin pocket and a second position in which the first pin is disengaged from the surface of the first pin pocket.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
13.
THERMAL BATTERY AND HEAT EXCHANGER ASSEMBLY USING PHASE CHANGE MATERIAL
A heating and cooling (HVAC) system that includes a compressor; a first heat exchanger; a second heat exchanger; a first expansion valve positioned between the first heat exchanger and the second heat exchanger; a first reversing valve that permits the system to operate in a first mode and a second mode; and a thermal battery including a phase change material therein that is configured to selectively store and release thermal energy received from a working fluid.
H01M 10/6569 - Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
H01M 10/6556 - Solid parts with flow channel passages or pipes for heat exchange
H01M 10/663 - Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
A compressor may include first and second scroll members, a driveshaft, first and second bearings, and first and second Oldham couplings. The scroll members define compression pockets. The first bearing may define a first rotational axis about which the first scroll member rotates. The second bearing may support the second scroll member for rotation about a second rotational axis that is offset from the first rotational axis. The first Oldham coupling may include a first body and a plurality of first keys extending from the first body. The first keys may engage slots formed in the second scroll member. The second Oldham coupling is separate and distinct from the first Oldham coupling. The second Oldham coupling may include a second body and a plurality of second keys extending from the second body. The second keys may engage slots formed in a surface that rotates about the first rotational axis.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
A compressor includes a compression mechanism, a driveshaft, and a motor. The compression mechanism is configured to compress a fluid to a discharge pressure. The motor is configured to rotate the driveshaft. The driveshaft is engaged with the compression mechanism and is fixed to rotate with at least a portion of the compression mechanism. The driveshaft includes a longitudinal aperture configured to receive the fluid at a suction pressure, and includes a flange that receives at least a portion of the compression mechanism. The flange and the compression mechanism define a fluid passage therebetween. The fluid at suction pressure is received within the fluid passage from the longitudinal aperture in the driveshaft.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
In other features, a refrigeration system is provided and includes a compressor motor, an inverter, a converter and a control module. The inverter is configured to convert a direct current (DC) bus voltage to an alternating current (AC) voltage and supply the AC voltage to the compressor motor. The converter is configured to convert a DC input voltage to the DC bus voltage. The control module is configured to obtain a parameter and in response to the parameter exceeding a predetermined threshold, reduce the DC bus voltage and at least one of (i) reduce a switching frequency, (ii) increase an amount of negative d-axis current of the compressor motor, or (iii) reduce a speed of the compressor motor.
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
H02P 23/28 - Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
17.
CLIMATE CONTROL SYSTEMS FOR USE WITH HIGH GLIDE WORKING FLUIDS AND METHODS FOR OPERATION THEREOF
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 system includes a gas-liquid separation vessel that generates a vapor stream and a liquid stream. 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.
A condenser charge module is configured to: determine a first amount of refrigerant in each condenser of one or more condensers of a refrigeration system; determine a total condenser amount of refrigerant based on the one or more first amounts. An evaporator charge module is configured to: determine a second amount of refrigerant in each evaporator of two or more evaporators of the refrigeration system; and determine a total evaporator amount of refrigerant based on the two or more second amounts. A line charge module is configured to: determine a third amount of refrigerant in each refrigerant line of multiple refrigerant lines of the refrigeration system; and determine a total line amount of refrigerant based on the multiple third amounts. A total module is configured to determine a total amount of refrigerant in the refrigeration system based on the total condenser, the total evaporator, and the total line amounts.
A cooling system that may include a source of liquid natural refrigerant, a heat exchanger in communication with the source of liquid natural refrigerant that is configured to convert the liquid natural refrigerant into a gaseous natural refrigerant, a compressor in communication with the heat exchanger and configured to increase a temperature and pressure of the gaseous natural refrigerant received from the heat exchanger, and an exhaust device in communication with the compressor and configured to expel the gaseous natural refrigerant received from the compressor to air of an external ambient environment. The exhaust device includes a membrane that permits the gaseous natural refrigerant to exit the exhaust device while preventing or at least minimizing the air of the external ambient environment from entering the exhaust device.
F25B 19/00 - Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
F25B 27/00 - Machines, plants or systems, using particular sources of energy
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F25B 43/00 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
F25B 31/02 - Compressor arrangements of motor-compressor units
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
A compressor may include first and second scrolls, an axial biasing chamber, and a modulation control valve. The second scroll includes an outer port and an inner port. The outer and inner ports may be open to respective intermediate-pressure compression pockets. The modulation control valve may be in fluid communication with the inner port, the outer port, and the axial biasing chamber. Movement of the modulation control valve into a first position switches the compressor into a reduced-capacity mode and allows fluid communication between the inner port and the axial biasing chamber while preventing fluid communication between the outer port and the axial biasing chamber. Movement of the modulation control valve into a second position switches the compressor into a full-capacity mode and allows fluid communication between the outer port and the axial biasing chamber while preventing fluid communication between the inner port and the axial biasing chamber.
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor includes a compression mechanism, a motor, a drive shaft, and a motor cooler. The compressor is configured to compress a working fluid. The motor dives the compression mechanism and is housed within a motor housing. The drive shaft is engaged with the motor and the compression mechanism and is configured to drive operation of the compression mechanism. The motor cooler is disposed adjacent the motor and is configured to pump a cooling working fluid around the motor. The motor cooler includes a pump that pumps the cooling working fluid into the motor housing based on a rotational speed of the drive shaft.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
A compressor includes a shell, a bearing housing, an orbiting scroll, a non-orbiting scroll and a spacer. The bearing housing includes a central body and a plurality of arms extending radially outwardly from the central body. Each of the arms has a first aperture. The non-orbiting scroll is meshingly engaged with the orbiting scroll and includes a plurality of second apertures. Each second aperture receives a bushing defining a first longitudinal axis and a fastener defining a second longitudinal axis. The fastener extends through the bushing and into a corresponding one of the first apertures in the bearing housing. The spacer is disposed between the bushing and the fastener of each second aperture and is configured to engage one of the bushing and the fastener to restrict radial misalignment between the first longitudinal axis of the bushing and the second longitudinal axis of the fastener.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
23.
CLIMATE-CONTROL SYSTEM WITH SENSIBLE AND LATENT COOLING
A climate-control system may include a vapor-compression circuit and an air handler assembly. The vapor-compression circuit may include a compressor, an outdoor heat exchanger, and first and second working-fluid-fluid flow paths. The first and second working-fluid-flow paths are in fluid communication with the outdoor heat exchanger. The first working-fluid-flow path may include a first expansion device and a first indoor heat exchanger. The second working-fluid-flow path may include a second expansion device and a second indoor heat exchanger. The first and second indoor heat exchangers are disposed within the air handler assembly. The air handler assembly includes a return-air-inlet duct, first and second airflow paths, and a supply-air-outlet duct. The first airflow path may receive air from the return-air-inlet duct and houses the first indoor heat exchanger. The second airflow path may receive air from the return-air-inlet duct. The supply-air-outlet duct receives air from the first and second airflow paths.
F24F 1/0083 - Indoor units, e.g. fan coil units with dehumidification means
F24F 3/153 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
A climate-control system may include a first compressor, a second compressor, a suction manifold, and a flow restrictor. The first and second compressors each include a shell and a compression mechanism. The shells define suction chambers from which the compression mechanisms draw working fluid. The shells include suction inlet fittings through which working fluid is drawn into the suction chambers. The suction inlet fittings are fluidly connected to the suction manifold. The suction manifold provides suction-pressure working fluid to the suction inlet fittings of the first and second compressors. The flow restrictor may be at least partially disposed within the suction manifold.
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.
F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25D 17/02 - Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
F16K 11/085 - Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves; Arrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
A refrigerant leak sensor includes: a first refrigerant sensor element configured to, when powered: measure a first amount of the refrigerant present in air; and generate a first output based on the first amount; a second refrigerant sensor element configured to, when powered: measure a second amount of the refrigerant present in air; and generate a second output based on the second amount; a first selection module configured to: during a first period, apply power the first refrigerant sensor element and not apply power to the second refrigerant sensor element; and during a second period after the first period, apply power to the second refrigerant sensor element and not apply power to the first refrigerant sensor element.
A method for determining a mass flow of a dynamic compressor that does not include a mass flow sensor while the compressor is operating to compress a working fluid includes determining, by a processor, a current operating point of the compressor. If the current operating point is the same as one in a map of a plurality of predetermined operating points stored in a memory, the mass flow of that predetermined operating point is retrieved as the mass flow of the current operating point. Otherwise, the processor calculates the mass flow at the current operating point from the mass flows of a subset of the predetermined operating points nearest the current operating point. The dynamic compressor continues to operate to compress the working fluid based at least in part on the calculated mass flow rate for the current operating point.
A heat-pump system may include a compressor, an outdoor heating exchanger, an indoor heat exchanger, an expansion device, and a supplemental heater. The outdoor heat exchanger may be in fluid communication with the compressor. The indoor heat exchanger may be in fluid communication with the compressor. The expansion device may be in fluid communication with the indoor and outdoor heat exchangers. The supplemental heater may include a burner and a working-fluid conduit. The burner may be configured to burn a fuel and heat the working-fluid conduit. When the heat-pump system is operating in a heating mode, the indoor heat exchanger may receive working fluid from the working-fluid conduit such that the working fluid flows from an outlet of the working-fluid conduit to an inlet of the indoor heat exchanger.
A heat-pump system may include an outdoor heat exchanger, an expansion device, an indoor heat exchanger, a compressor, and a multiway valve. The expansion device is in fluid communication with the outdoor heat exchanger. The indoor heat exchanger is in fluid communication with the expansion device. The compressor circulates working fluid through the indoor and outdoor heat exchangers. The multiway valve may be movable between a first position corresponding to a cooling mode of the heat-pump system and a second position corresponding to a heating mode of the heat-pump system. The working fluid flows in the same direction through the outdoor heat exchanger in the cooling mode and in the heating mode, and the working fluid flows in the same direction through the indoor heat exchanger in the cooling mode and in the heating mode.
F16K 11/076 - Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves; Arrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with pivoted closure members with sealing faces shaped as surfaces of solids of revolution
F16K 11/085 - Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves; Arrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
30.
SEALING EGRESS FOR FLUID HEAT EXCHANGE IN THE WALL OF A STRUCTURE
An example refrigeration system includes an indoor fluid loop, an outdoor fluid loop, and a heat exchanger assembly. The indoor fluid loop circulates a first working fluid. The outdoor fluid loop circulates a second working fluid that is different from the first working fluid and is separated from the indoor fluid loop by a wall of a structure. The heat exchanger assembly is mounted within the wall of the structure. The heat exchanger assembly includes a heat exchanger and a housing, where the heat exchanger is disposed within an internal space defined by the housing. The housing supports the heat exchanger within the internal space and is mounted to a structure of the wall.
A heat exchanger including a pair of end plates, a plurality of flow plates sandwiched between the pair of end plates, and a plurality of heat transfer films that are respectively positioned between adjacent flow plates, and between each of the end plates and an immediately adjacent flow plate.
F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F28F 21/06 - Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
A bearing system includes a bearing housing and a foil bearing assembly. The bearing housing includes a sleeve that defines a cylindrical bore and includes at least one bearing assembly locking feature, and a mounting structure. The foil bearing assembly includes an outer foil assembly, an inner foil assembly, and a bump foil assembly positioned between the outer foil assembly and the inner foil assembly. The outer foil assembly includes at least one outer foil pad that extends circumferentially from a first end including a bearing retention feature to a second end. The bearing retention feature is cooperatively engaged with the at least one bearing assembly locking feature. The inner foil assembly includes a plurality of circumferentially-spaced inner foil pads. Each inner foil pad extends circumferentially from a tab to a free end. At least one inner foil pad is welded to the outer foil assembly along the tab.
A mitigation verification system includes: a control module configured to selectively transition a mitigation device of a refrigeration system of a building from a first state to a second state; and a verification module configured to verify and generate an indicator of whether the mitigation device of the refrigeration system transitioned from the first state to the second state based on a change in a parameter of the refrigeration system over a period in response to the transition by the control module.
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/52 - Indication arrangements, e.g. displays
F24F 11/77 - Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
F25B 49/00 - Arrangement or mounting of control or safety devices
A compressor includes a shell assembly, a compression mechanism and a conduit. The shell assembly defines a chamber. The compression mechanism is disposed within the chamber of the shell assembly and includes a first scroll member and a second scroll member in meshing engagement with each other. The second scroll member includes a suction inlet. The conduit directs working fluid into the suction inlet and includes a first end defining an inlet opening and a second end defining an outlet opening adjacent to the suction inlet. The second end includes a locating pin that extends outwardly therefrom.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
A compressor includes a shell, a muffler plate, first and second scroll members, and first and second sealing members. The shell defines first and second pressure regions separated by the muffler plate. The first scroll member includes a first end plate and a first scroll wrap. The first end plate defines an annular recess and a discharge recess. The discharge recess is in communication with the first pressure region. The second scroll member includes a second end plate and a second scroll wrap. The second scroll wrap meshingly engages the first scroll wrap to define a compression chamber therebetween. The first sealing member is at least partially disposed in the discharge passage and fluidly separates the first and second pressure regions from each other. The second sealing member is at least partially disposed in the annular recess.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
36.
COOLING SYSTEM FOR CENTRIFUGAL COMPRESSOR AND REFRIGERATION SYSTEM INCLUDING SAME
A cooling system for a compressor includes a coolant supply line, a coolant return line, a temperature sensor connected to the coolant return line to detect at least one of a temperature of the coolant return line and a temperature of coolant within the coolant return line, and a controller. The coolant supply line includes a coolant control valve, and is connectable to a housing of the compressor to deliver coolant to at least one of a plurality of coolant flow channels defined therein. The coolant return line is connectable to the compressor housing to receive coolant from the coolant flow channels and return coolant to a low-pressure side of the compressor. The controller is configured to control the coolant control valve based on the temperature detected by the temperature sensor to control the supply of coolant through the coolant supply line.
A system includes a dynamic compressor, a variable frequency drive (VFD), and a controller. The dynamic compressor includes a motor having a driveshaft rotatably supported within the dynamic compressor, and a compression mechanism connected to the driveshaft and operable to compress a working fluid upon rotation of the driveshaft. The VFD includes a sensor configured to sense a current provided to the motor. The controller is connected to the motor and includes a processor and a memory. The memory stores instructions that program the processor to operate the motor using the VFD to compress the working fluid, receive signals representing the current from the VFD to the motor, and determine when a surge event has occurred based at least in part on the received signals representing the current from the VFD to the motor.
A refrigerant measurement adjustment system includes: a refrigerant sensor for a building and configured to measure an amount of refrigerant present in air outside of a refrigeration system of the building; and an adjustment module configured to: adjust the amount of refrigerant measured based on an adjustment to produce an adjusted amount; and determine the adjustment based on at least one of: an air temperature; an air pressure; a relative humidity of air; a mode of operation of the refrigeration system; a change in the measurements of the refrigerant sensor over time; and whether a blower that blows air across a heat exchanger of the refrigeration system located within the building is on.
A compressor includes first and second scroll members and a bearing housing. The first scroll member includes a first end plate and a first scroll wrap. The second scroll member includes a second end plate that has a first surface, a second surface, and an oil passage. The first surface has a second scroll wrap meshingly engaging the first scroll wrap. The second surface includes an oil slot. The oil passage is in fluid communication with the oil slot. The bearing housing cooperates with the second scroll member to define an interior volume. The second scroll member is movable between a first position in which lubricant in the interior volume is allowed to flow into the oil passage via the oil slot, and a second position in which working fluid in the chamber is allowed to flow into the oil passage via the oil slot.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A system includes a heat-pump circuit and a heating-fluid circuit. The heat-pump circuit includes a compressor and a first condenser conduit. The heating-fluid circuit includes first, second, and third flow-paths. The third flow-path selectively communicates with the first and second flow-paths. The first flow-path includes a first valve. The first valve moves between an open position allowing fluid flow through the first flow-path and a closed position restricting fluid flow through the first flow-path. The second flow-path includes a second condenser conduit and a second valve. When the second valve is open, fluid flows through the second flow-path. In the closed position, the second valve restricts fluid flow through the second flow-path. The third flow-path includes a heat exchanger receiving fluid from the first flow-path when the first valve is in the open position and receiving fluid from the second flow-path when the second valve is in the open position.
F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F28D 20/00 - Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups or
F25D 17/02 - Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
41.
REFRIGERANT LEAK SENSOR POWER CONTROL SYSTEMS AND METHODS
A sensor control system includes: a refrigerant leak sensor configured to, when powered, measure an amount of a refrigerant present in air outside of a heat exchanger of a refrigeration system, where the heat exchanger is located within a building that is at least one of heated and cooled by the refrigeration system; and a power control module configured to one of: continuously power the refrigerant leak sensor; and disconnect the refrigerant leak sensor from power when a blower that moves air past the heat exchanger is on.
A heating, ventilation, and air conditioning system includes first and second fluids, a heat exchanger, a refrigerant sub-system, and at least one closed loop sub-system. The heat exchanger includes a membrane for channeling the first fluid through the heat exchanger and is disposed for heat transfer between the first fluid and the second fluid. The membrane defines an inlet having an inlet height relative to grade. The closed loop sub-system transfers heat from the heat exchanger to the refrigerant sub-system and includes an expansion tank containing the first fluid. A level of the first fluid within the expansion tank has a level height relative to grade. The expansion tank is positioned relative to the heat exchanger such that the inlet height is greater than the level height and the membrane is maintained in a collapsed configuration.
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
A refrigerant sub-system includes a compressor, a condenser, an expansion valve, an evaporator, and a refrigerant-air heat exchanger. The compressor receives and compresses refrigerant. The condenser condenses the refrigerant and transfers heat from the refrigerant to a first fluid. The expansion valve expands the refrigerant. The evaporator vaporizes the refrigerant at the first pressure and transfers heat from a second fluid to the refrigerant. The refrigerant-air heat exchanger has a first operating mode and a second operating mode. In the first operating mode, the condenser is adapted to condense a first portion of the refrigerant from a vapor to a liquid, and the refrigerant-air heat exchanger is adapted to condense a second portion of the refrigerant from a vapor to a liquid and transfer heat from the second portion of the refrigerant to air.
F25B 5/02 - Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
F25B 6/02 - Compression machines, plants or systems, with several condenser circuits arranged in parallel
F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
F25B 41/325 - Expansion valves having two or more valve members
F25B 41/39 - Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
A refrigerant control system includes: a reversing valve including: a first inlet configured to receive refrigerant output from a condenser; a first outlet configured to output refrigerant to an inlet of an evaporator located inside of a building; a second inlet configured to receive refrigerant output from the evaporator; and a second outlet configured to output refrigerant to an inlet of a compressor that pumps refrigerant to the condenser; a reversing module configured to: selectively actuate the reversing valve to a first position such that: refrigerant flows directly from the second inlet to the second outlet; and refrigerant flows directly from the first inlet to the first outlet; and selectively actuate the reversing valve to a second position such that: refrigerant flows directly from the second inlet to the first outlet; and refrigerant flows directly from the first inlet to the second outlet.
An HVAC system includes an unloading device, a centrifugal compressor, a gas foil bearing, a VFD and a controller. The controller is programmed to start the centrifugal compressor from a stopped condition by operating the unloading device to remove a load from the centrifugal compressor, accelerating the motor to a first speed above a liftoff speed of the gas foil bearing and below an operating speed of the centrifugal compressor, running the motor for a period of time, operating the unloading device to apply the load to the centrifugal compressor, and accelerating the motor to the operating speed.
A system for charging an outdoor unit with refrigerant includes a sensor configured to measure a refrigerant concentration and a user device configured to receive the measured refrigerant concentration. The system includes that the user device is configured to, in response to the measured refrigerant concentration exceeding a threshold, generate and display an alert on a user interface of the user device indicating the measured refrigerant concentration exceeds the threshold.
A system for controlling a capacity of a compressor includes a motor of the compressor including a main winding connected at a connection point to an auxiliary winding and a drive configured to control a speed of the motor. The system includes a first switch configured to selectively connect the main winding to either a first line voltage or a first output of the drive, a second switch configured to selectively connect the connection point to either a second line voltage or a second output of the drive, and a third switch configured to selectively connect the auxiliary winding to either a capacitor or a third output of the drive. The system includes a solenoid valve configured to selectively either operate in a first capacity or a second capacity. The system includes a control module configured to control the drive, the first switch, the second switch, and the third switch.
F04B 49/22 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by means of valves
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
H02P 6/06 - Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
A refrigeration system of a building includes: a compressor module configured to, in response to a determination that an amount of a refrigerant of the refrigeration system that is present outside of the refrigeration system and within the building is greater than a first predetermined amount, maintain a compressor off continuously for a predetermined period; and a fan module configured to, in response to the determination, maintain a fan on continuously for at least the predetermined period, and where the compressor module is further configured to, without receiving input indicative of a reset of the refrigeration system, after the compressor has been off for the predetermined period and the amount of refrigerant that is present outside of the refrigeration system within the building is less than a second predetermined amount, selectively turn the compressor on.
A refrigerant control system includes: a charge module configured to determine an amount of refrigerant that is present within a refrigeration system of a building; a leak module configured to diagnose that a leak is present in the refrigeration system based on the amount of refrigerant; and at least one module configured to take at least one remedial action in response to the diagnosis that the leak is present in the refrigeration system.
A compressor includes a shell, a compression mechanism and a fitting. The shell includes an opening and defines a chamber. The compression mechanism is disposed within the chamber of the shell. The fitting is attached to the shell at the opening. Working fluid flowing through the fitting flows to the compression mechanism. The opening is partially defined by a first edge and a second edge. The first edge includes a first planar surface and the second edge includes a second planar surface that faces the first planar surface. A first portion of the fitting extends at least partially into the opening and a second portion of the fitting abuts against the first and second edges.
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
51.
REFRIGERANT LEAK SENSOR AND MITIGATION DEVICE AND METHODS
A system for detecting and mitigating a refrigerant leak includes a temperature control device configured to transmit control signals to a component controller and a blower configured to circulate air. The system includes a leak mitigation controller electrically coupled to the temperature control device and the component controller. The leak mitigation controller directs incoming power to the temperature control device. The leak mitigation controller includes a sensor configured to measure a refrigerant concentration and a relay configured to selectively: (i) connect the temperature control device to the incoming power or (ii) connect the blower to the incoming power. The leak mitigation controller is configured to measure the refrigerant concentration with the sensor and, in response to the measured refrigerant concentration exceeding a threshold, actuate the relay to connect the blower to the incoming power.
A refrigeration system includes: a leak sensor disposed within a building and configured to measure an amount of refrigerant that has leaked from the refrigeration system within the building; a prediction module configured to determine a predicted amount of refrigerant that has leaked from the refrigeration system within the building based on the measured amount; and a leak module configured to: determine whether a leak is present in the refrigeration system within the building based on the predicted amount of refrigerant that has leaked from the refrigeration system; and take one or more remedial actions when a leak is present in the refrigeration system within the building.
A refrigerant control system includes: a charge module configured to determine an amount of refrigerant that is present within a first portion of a refrigeration system within a building; and an isolation module configured to selectively open and close an isolation valve of the refrigeration system and to, via the isolation valve, maintain the amount of refrigerant within the first portion within the building below a predetermined amount of the refrigerant.
A compressor system includes a compressor housing and a driveshaft rotatably supported within the compressor housing. The compressor system further includes an impeller that imparts kinetic energy to incoming refrigerant gas upon rotation of the driveshaft, a thrust disk coupled to the driveshaft, and a bearing assembly mounted to the compressor housing. The impeller includes an impeller bore having an inner surface, and the thrust disk includes an outer disk and a hub. The bearing assembly rotatably supports the outer disk of the thrust disk. The hub is disposed within the impeller bore, and includes a hub outer surface in contact with the inner surface of the impeller bore. A first contact force between the hub outer surface and the inner surface of the impeller bore increases with increased rotational speed of the driveshaft.
A compressor may include a shell, first and second scroll members, a floating seal, a muffler plate, and a wear ring. The shell defines a discharge chamber and a suction chamber. The floating seal may sealingly engage the second scroll member. The muffler plate defines the discharge chamber and the suction chamber. The wear ring may sealingly engage the muffler plate and the floating seal such that the wear ring, the muffler plate, and the floating seal fluidly isolate the discharge chamber from the suction chamber. The muffler plate may include an axially facing surface that contacts the wear ring. The axially facing surface may include an annular recess. The wear ring may at least partially cover the annular recess. The annular recess may provide clearance between the muffler plate and the wear ring to allow the wear ring to deflect relative to the muffler plate during compressor operation.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
A compressor may include a shell assembly, orbiting and non-orbiting scrolls, a bearing housing, a bushing, a damper, and a fastener. The bearing housing includes a first aperture. The bushing may include an axial end abutting the bearing housing. The bushing may extend through a second aperture of the non-orbiting scroll. The bushing may include a third aperture. The damper may be received in a pocket that may be defined by and disposed radially between an outer diametrical surface of the bushing and an inner diametrical surface of the non-orbiting scroll. The damper may be at least partially disposed within the second aperture and may encircle the second portion of the bushing. The fastener may include a shaft portion and a flange portion. The shaft portion may extend through the third aperture and into the first aperture. The flange portion may contact a first axial end of the damper.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor includes a shell assembly, a muffler plate and a compression mechanism. The shell assembly has a suction chamber and a discharge chamber. The muffler plate is disposed within the shell assembly and separates the suction chamber from the discharge chamber. The muffler plate includes a hub having a circumferentially extending inner portion and a circumferentially extending intermediate portion. The circumferentially extending inner portion defines a discharge passage extending therethrough. The circumferentially extending intermediate portion has a slot formed in a surface thereof. The slot extends at least partially around the circumferentially extending intermediate portion. The compression mechanism is disposed within the suction chamber and provides working fluid to the discharge chamber via the discharge passage of muffler plate.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor includes a shell, a first scroll member, a second scroll member and a sealing assembly. The shell defines a first pressure region and a second pressure region. The first scroll member is disposed within the shell and includes a first end plate and a first scroll wrap. The second scroll member includes a second end plate and a second scroll wrap. The second scroll wrap meshingly engages the first scroll wrap to define a compression chamber therebetween. The seal assembly fluidly separates the first and second pressure regions from each other. The seal assembly includes a first plate, a second plate, a first sealing member and a second sealing member. The first sealing member is sealingly engaged with the first plate and the second plate. The second sealing member is sealingly engaged with the first sealing member and the first plate.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
A compressor may include a shell assembly, a first scroll, a second scroll, a driveshaft, and a bearing. The first scroll includes a first end plate and a first spiral wrap extending from the first end plate. The second scroll includes a second end plate and a second spiral wrap extending from the second end plate. The spiral wraps engage each other to form fluid pockets. The driveshaft may engage one of the scrolls. The bearing supports the driveshaft for rotation relative to the shell assembly. The bearing includes first and second axial ends and an aperture extending through the first and second axial ends. The driveshaft extends through the aperture. The aperture is defined by an inner diametrical surface of the bearing. The inner diametrical surface may include a tapered portion that extends radially outward as the tapered portion extends axially toward the first axial end of the bearing.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
60.
MULTI-PHASE EMI AND TRANSIENT PROTECTION CIRCUITS AND SYNCHRONOUS RECTIFICATION CONTROL FOR COMPRESSORS OF REFRIGERATION SYSTEMS
A drive for a mobile compressor includes EMI and transient protection circuits, second chokes, converters and an inverter. The EMI and transient protection circuits include respectively common mode chokes and at least one component. Each of the common mode chokes is configured to receive a first direct current voltage and is connected to first and second grounds. The at least one component is connected to a third ground. The first, second and third grounds are at different voltage potentials. The second chokes are connected downstream from the common mode chokes. The converters are connected to outputs of the second chokes and are configured to collectively provide a second direct current voltage to a direct current bus. The inverter is connected to the direct current bus and configured to convert the second direct current voltage to an alternating current voltage to power the mobile compressor downstream from the inverter.
H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
F04B 35/04 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
An optocoupler circuit includes first and second resistors, an optocoupler, a reference circuit, and a comparator. The optocoupler includes a light source and a phototransistor. The light source is connected to form a first voltage divider with the first resistor. The phototransistor is connected to form a second voltage divider with the second resistor. The optocoupler transitions an output of the second voltage divider between first and second levels. Magnitudes of the first and second levels are greater than zero. The reference circuit is configured to output a reference voltage. The comparator includes a first input and a second input. The first input receives an output of the first voltage divider. The second input receives the reference voltage. An output of the comparator transitions between a third level and a fourth level based on a comparison between the output of the first voltage divider and the reference voltage.
H03K 17/78 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
H03K 17/16 - Modifications for eliminating interference voltages or currents
A compressor may include a shell assembly, a compression mechanism, a driveshaft, a first bearing, a second bearing, a third bearing, and a surface supporting the third bearing. The compression mechanism may include first and second compression members. The driveshaft may be coupled to the first compression member to rotate the first compression member relative to the second compression member. The first bearing may support the driveshaft for rotation about a first axis. The second bearing may support the driveshaft for rotation about the first axis. The third bearing defines a second axis. The third bearing may support the second compression member for rotation relative to the first compression member. The surface may support the third bearing such that the third bearing is able to roll along the surface to move the second compression member and the second axis in a radial direction relative to the first compression member.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
63.
METHODS FOR MANUFACTURING A SHROUDED IMPELLER, SHROUDED IMPELLER AND COMPRESSOR
A method of manufacturing an impeller includes attaching blades to a hub. The impeller includes the blades, the hub, and a shroud. The blades each include a tip, and the shroud includes an inner surface and at least one ring extending from the inner surface. The method also includes applying a brazing compound to the tips of the blades and to the inner surface of the shroud. The method includes inserting the blades and the hub into the shroud such that the tips of the blades press against the rings. The rings and the tips of the blades form an interference fit between the rings and the tips of the blades that maintains a consistent gap between the shroud and the blades during manufacture of the impeller. A compressor including the impeller is also disclosed.
A desired OFF period module is configured to determine a desired OFF period for a plurality of switches of a PFC circuit based on an input voltage and an output voltage. A blanking timer module is configured to output a blanking signal, set the blanking signal to a first state when a countdown timer is greater than zero, and set the blanking signal to a second state when the countdown timer reaches zero. A switching control module is configured to: transition a first switch of the plurality of switches from an ON state to an OFF state in response to (i) a measured current through an inductor of the PFC circuit being greater than a demanded current through the inductor and (ii) the blanking signal being in the second state; and maintain the first switch in the OFF state for the desired OFF period after the transition.
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 3/158 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
A compressor may include a compressor shell, a motor, a compression mechanism, and an assembly that houses an electronic component. The electronic component may control operation of the compressor and/or diagnose compressor faults. The assembly may include a shell, an electronic component, a fan, and an airflow deflector. The shell member may define an enclosure having an internal cavity. The fan and the electronic component may be disposed within the internal cavity. The airflow deflector may include a base portion, a first leg, and a second leg. The first and second legs may be spaced apart from each other and extend from the base portion. The fan may force air against the base portion. A first portion of the air may flow from the base portion along the first leg. A second portion of the air may flow from the base portion along the second leg.
A compressor may include a shell assembly, first and second scrolls, a piston, and a piston-retention member. The piston engages the first scroll and may be partially received within a recess defined by the shell assembly. The piston and the shell assembly may cooperate to define a pressure chamber. The pressure chamber may be in selective fluid communication with a source of working fluid to control movement of the piston relative to the shell assembly. The piston-retention member may engage the piston and a rotationally fixed structure. The piston-retention member allows rotation of the piston relative to the first scroll in a first rotational direction and restricts rotation of the piston relative to the first scroll in a second rotational direction.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor includes a shell assembly, a compression mechanism and a suction fitting. The shell assembly defines a chamber. The compression mechanism is disposed within the chamber of the shell assembly and includes a suction inlet. The suction fitting is attached to the shell assembly and extends at least partially into the chamber of the shell assembly. The suction fitting defines first and second openings. The suction fitting directs working fluid through the first opening towards the compression mechanism and the suction fitting directs working fluid through the second opening away from the compression mechanism.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
A compressor including a refrigerant and a lubricant, wherein the lubricant comprises at least one compound selected from the group consisting of a mono-tertiary amine, a di-tertiary amine, a tri-tertiary amine, and a tetra-tertiary amine.
A compressor that includes a shell assembly, a compression mechanism and a conduit. The shell assembly defines a chamber. The compression mechanism is disposed within the chamber of the shell assembly and includes a first scroll member and a second scroll member in meshing engagement with each other. The second scroll member includes an externally located slot and a suction inlet. The conduit includes a first end that defines an inlet opening and a second end that defines an outlet opening. The second end includes a connecting arm that has a first boss extending therefrom. The second end snaps into engagement with the second scroll member such that the first boss is received within the slot of the second scroll member.
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor may include a compression mechanism, a driveshaft, and an oil allocation member. The driveshaft drives the compression mechanism and includes a lubricant passage having an inlet and first and second outlets. The first outlet is disposed vertically higher than the inlet and the second outlet is disposed vertically higher than the first outlet. The oil allocation member is disposed within the lubricant passage. The oil allocation member may define first, second and third channels. The first channel extends through a lower axial end of the oil allocation member. The second channel receives a first portion of the lubricant from the first channel. The third channel receives a second portion of the lubricant from the first channel. The first and second portions of the lubricant may be separated from each other at a location that is vertically higher than the first outlet.
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
A compressor includes a shell, first and second scroll members, a fitting assembly and a valve assembly. The first scroll member includes a first end plate having a first spiral wrap extending therefrom. The second scroll member includes a second end plate having a second spiral wrap extending therefrom and an injection passage formed in the second end plate. The second spiral wrap is meshingly engaged with the first spiral wrap to form compression pockets. The injection passage is in fluid communication with the compression pockets. The fitting assembly is in fluid communication with the injection passage. The valve assembly coupled to one of the second scroll member and the fitting assembly and movable between a closed position in which fluid communication between the compression pockets and the suction chamber is prevented and an open position in which fluid communication between the compression pockets and the suction chamber is allowed.
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F25B 31/02 - Compressor arrangements of motor-compressor units
F25B 1/047 - Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
72.
FOIL BEARING ASSEMBLY AND COMPRESSOR INCLUDING SAME
A bearing system includes a bearing housing that includes a sleeve and a mounting structure for connecting the bearing system to a compressor housing. The sleeve has a radial inner surface that defines a cylindrical bore, and includes a locking feature located along the radial inner surface. The mounting structure is located radially outward from the sleeve. The bearing system also includes a foil bearing assembly positioned within the cylindrical bore. The foil bearing assembly includes an outer foil, an inner foil, and a bump foil positioned between the outer foil and the inner foil. At least one of the outer foil and the inner foil includes a bearing retention feature cooperatively engaged with the locking feature to maintain the foil bearing assembly within the bearing housing at a fixed rotational position.
A climate-control system may include a first fluid circuit, a desiccant system, and a second fluid circuit. The first fluid circuit may include a desorber, an absorber, and an evaporator. A first fluid exits the desorber through a first outlet and flows through the evaporator and a first inlet of the absorber. A second fluid exits the desorber through a second outlet and may flow through a second inlet of the absorber. The desiccant system includes a conditioner and a regenerator. The conditioner includes a first desiccant flow path. The regenerator includes a second desiccant flow path in communication with the first desiccant flow path. The second fluid circuit circulates a third fluid that is fluidly isolated from the first and second fluids and desiccant in the desiccant system. The second fluid circuit may be in heat transfer relationships with the first fluid and the first desiccant flow path.
F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
F25B 15/06 - Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
A foil bearing assembly includes a cylindrical body that defines a cooling fluid passage between a radial outer surface and a radial inner surface of the cylindrical body. The foil bearing assembly includes a foil bearing retained within the cylindrical body and in thermal communication with the radial inner surface of the cylindrical body. The foil bearing assembly is connectable to a bearing housing such that intake and outlet ports of the foil bearing assembly are connected in fluid communication with a coolant inlet passage and a coolant outlet passage defined by the bearing housing. The foil bearing assembly is interchangeable with a second foil bearing assembly having at least one of a cooling fluid passage, a foil bearing, and a cylindrical body inner diameter different than the corresponding cooling fluid passage, the foil bearing, and the cylindrical body inner diameter of the first foil bearing assembly.
A system for monitoring health of refrigerated storage containers includes an instantaneous health module configured to determine instantaneous health values for a refrigerated storage container based on parameters measured by sensors of a refrigeration system of the refrigerated storage container during a trip of the refrigerated storage container. A statistics module is configured to, after completion of the trip of the refrigerated storage container, determine statistical values based on the instantaneous health values determined for the trip. A health module is configured to determine an overall health value for the refrigerated storage container at the completion of the trip based on the statistical values and to store the overall health value for the refrigerated storage container in memory in association with a unique identifier of the refrigerated storage container.
B65D 88/74 - Large containers having means for heating, cooling, aerating or other conditioning of contents
B65D 90/48 - Arrangements of indicating or measuring devices
F25D 17/04 - Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating gas, e.g. by natural convection
F25D 29/00 - Arrangement or mounting of control or safety devices
A system may include a first compressor, a second compressor, a first heat exchanger and a second heat exchanger. The first compressor has a first inlet and a first outlet. The second compressor is a sumpless compressor and has a second inlet and a second outlet. The second compressor provides working fluid discharged from the second outlet to the first compressor. The first heat exchanger is disposed upstream of the second compressor and provides working fluid to the second compressor. The second heat exchanger is disposed upstream of the first compressor and provides working fluid to the first compressor.
Systems and methods for providing lubricant from a first compressor to a second compressor are provided. A control module receives a start command for a climate-control system having the first and second compressors, allows lubricant from the first compressor to flow into an inlet of the second compressor, turns the second compressor to an ON-mode, and prevents lubricant from the first compressor from flowing into the inlet of the second compressor after the second compressor has been in the ON-mode for a predetermined time period.
F25B 31/02 - Compressor arrangements of motor-compressor units
F25B 43/02 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
Systems and methods for purging lubricant from a first compressor to a second compressor are provided. A control module receives a lubricant purge command, shuts the second compressor to an OFF-mode while the first compressor remains in the ON-mode, restricts working fluid from an outlet of the second compressor from flowing into the first compressor and allows compressed working fluid discharged from an outlet of the first compressor to flow into the inlet of the second compressor such that lubricant in the second compressor flows into the first compressor.
F25B 43/02 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
F25B 31/02 - Compressor arrangements of motor-compressor units
A compressor (10) includes a compression mechanism (18) and a driveshaft (62) that drives the compression mechanism (18). The driveshaft (62) may include a first axially extending passage (94), a second axially extending passage (96), and a lubricant distribution passage (100). The first and second axially extending passages (94, 96) may be radially offset from each other and may intersect each other at an overlap region (98). The first and second axially extending passages (94, 96) are in fluid communication with each other at the overlap region (98). The lubricant distribution passage (100) may extend from the first axially extending passage (94) through an outer diametrical surface of the driveshaft (62). The lubricant distribution passage (100) may be disposed at a first axial distance (D1) from a first axial end (90) of the driveshaft (62). A first axial end of the overlap region (98) may be disposed at a second axial distance (D2) from the first axial end (90) of the drive shaft (62). The first axial distance (D1) is greater than the second axial distance (D2).
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
322). An evaporator volatilizes liquid ammonia for a refrigeration effect. An electrochemical device can increase a total pressure of the working fluid and/or a first partial pressure of ammonia and decrease a second partial pressure of hydrogen when an f is applied. A condenser cools the working fluid/transforms ammonia to a liquid. A separator separates liquid ammonia from gas phase hydrogen. A heat exchanger may be provided downstream of the evaporator. The system may include an ejector combining vapor phase ammonia and gas phase hydrogen in a pressurized stream. A second electrochemical device is optionally included that decreases a pressure of gas phase hydrogen exiting the separator and which generates electrical potential that is transferred to the first electrochemical device. Such high efficiency systems may be free of any mechanical pumps or moving parts.
F25B 15/04 - Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being ammonia evaporated from aqueous solution
F25B 43/00 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
81.
CLIMATE-CONTROL SYSTEM HAVING VAPOR-INJECTION COMPRESSORS
A climate-control system includes a first compressor and a second compressor. The first compressor includes a first inlet and a first outlet. The second compressor is in fluid communication with the first compressor and includes second and third inlets, a second compression mechanism and a second outlet. The second and third inlets are fluidly coupled to the second compression mechanism. The second compression mechanism receives working fluid from the first compressor through the third inlet and discharges working fluid through the second outlet of the second compressor.
EMERSON CLIMATE TECHNOLOGIES RETAIL SOLUTIONS, INC. (USA)
Inventor
Contrada, Anthony
Wallace, John
Abstract
Systems and methods are provided and include an optical sensor configured to be disposed on a sight glass. The optical sensor is configured to generate signals based on a light reflectivity associated with a liquid of the refrigeration system. An optical sensor control module that includes a processor that is configured to execute instructions stored in a nontransitory memory, and the instructions include (i) generating a set of data based on the signals, and (ii) determining an amount of liquid of the refrigeration system based on the set of data.
A climate-control system may include a working-fluid circuit and a cooling-fluid circuit. The working-fluid circuit may include a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger. The compressor compresses a working fluid. The outdoor heat exchanger may receive compressed working fluid from the compressor. The expansion device may be disposed downstream of the outdoor heat exchanger. The indoor heat exchanger may be disposed downstream of the expansion device and upstream of the compressor. The cooling-fluid circuit may contain a cooling fluid in a heat transfer relationship with working fluid in the working-fluid circuit. The cooling-fluid circuit may include an underground heat exchanger conduit embedded in earth below an earth ground surface. The underground heat exchanger may selectively receive the cooling fluid such that heat from the cooling fluid is transferred to the earth.
A compressor may include first and second scrolls, and an axial biasing chamber. Spiral wraps of the scrolls mesh with each other and form compression pockets including a suction-pressure compression pocket, a discharge-pressure compression pocket, and intermediate-pressure compression pockets. The axial biasing chamber may be disposed axially between the second end plate and a component. Working fluid disposed within the axial biasing chamber may axially bias the second scroll toward the first scroll. The second end plate includes outer and inner ports. The outer port is disposed radially outward relative to the inner port. The outer port may be open to a first one of the intermediate-pressure compression pockets and in selective fluid communication with the axial biasing chamber. The inner port may be open to a second one of the intermediate-pressure compression pockets and in selective fluid communication with the axial biasing chamber.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
A climate-control system includes a first working-fluid circuit, a second working-fluid circuit and a first heat exchanger. The first working-fluid circuit includes a first compressor, a second heat exchanger and a first pump. The second heat exchanger is in fluid communication with the first compressor. The first pump receives a first working fluid from the second heat exchanger and circulates the first working fluid through the first working-fluid circuit. The second working-fluid circuit is fluidly isolated from the first working-fluid circuit and includes a second pump and a fourth heat exchanger. The second pump is in fluid communication with the fourth heat exchanger. The first heat exchanger is thermally coupled with the first working-fluid circuit and the second working-fluid circuit.
An IAQ sensor module includes: a sensor configured to measure an amount of an item in air, the item being one of particulate matter, volatile organic compounds, and carbon dioxide; a minimum module configured to selectively store the amount of the item as a minimum value of the amount when a mitigation device has been on for at least a predetermined period, the mitigation device being configured to decrease the amount of the item in the air when on; a storing module configured to selectively store the minimum value as an initial minimum value; an offset module configured to determine a drift offset for the sensor based on a difference between the minimum value and the initial minimum value; and an adjustment module configured to determine an adjusted amount of the item in the air at the IAQ sensor module based on the amount and the drift offset.
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
A condition identification module is configured to, based on output from the at least one of a microphone and a camera, indicate an occurrence of a user having a physical condition. A correlation module is configured to, based on the occurrence of the user having the physical condition and at least one of a temperature of air, a relative humidity of air, an amount of particulate of at least a predetermined size present in air, an amount of VOCs present in air, and an amount of carbon dioxide present in air, selectively identify the presence of a correlation between the occurrence of the user having the physical condition and the at least one of the temperature, the RH, the amount of particulate, the amount of VOCs, and the amount of carbon dioxide.
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
A control system for a mitigation device includes a processor and a computer-readable medium that includes instructions executable by the processor. The instructions include monitoring a first measured particulate matter (PM) level of a conditioned space. The first measured PM level includes PM having a first range of sizes. The instructions further include monitoring a second measured PM level of the conditioned space. The second measured PM level includes PM having a second range of sizes. The first and second ranges are different but overlapping. The instructions also include asserting, in response to the first measured PM level being greater than a first predetermined threshold, an activation signal. The activation signal forces operation of a fan of the mitigation device. The instructions include asserting, in response to the second measured PM level being greater than a predetermined percentage of the first measured PM level, the activation signal.
B01D 53/04 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
A heating, ventilation, and air conditioning (HVAC) control system generates a request to replace a first air filter installed in an air handler of an HVAC system with a second air filter. The second air filter has a particulate matter removal efficiency rating that is greater than a particulate matter removal efficiency rating of the first filter. The system delays for a predetermined period of time and then obtains (i) a first temperature of air downstream of the air handler and (ii) a second temperature of air upstream of the air handler. The system then calculates a temperature difference between the f temperatures and determines whether the temperature difference is within an acceptable range. In response to the temperature difference being within the acceptable range, the system (i) operates the HVAC system using the second air filter and (ii) generates an alert indicating compatibility of the second air filter.
F24F 3/16 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by ozonisation
90.
SYSTEMS AND METHODS FOR ADJUSTING MITIGATION THRESHOLDS
An indoor air quality (IAQ) system for a building includes an IAQ sensor that is located within the building and that is configured to measure an IAQ parameter, the IAQ parameter being one of: a relative humidity (RH) of air; an amount of particulate of at least a predetermined size present in air; an amount of volatile organic compounds (VOCs) present in air; and an amount of carbon dioxide present in air. A mitigation module is configured to: selectively turn on a mitigation device based on a comparison of the IAQ parameter with a first threshold; and selectively turn off the mitigation device based on a comparison of the IAQ parameter with a second threshold. A thresholds module is configured to: set the first and second thresholds to predetermined default values; and selectively adjust at least one of the first and second thresholds.
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
An indoor air quality (IAQ) system for a building includes an IAQ sensor that is located within the building and that is configured to measure an IAQ parameter. The IAQ parameter is one of: an amount of particulate of at least a predetermined size present in air; an amount of volatile organic compounds (VOCs) present in air; and an amount of carbon dioxide present in air. A mitigation module is configured to: selectively turn on a mitigation device based on a comparison of the IAQ parameter with a first ON threshold and a second ON threshold; and selectively turn off the mitigation device based on a comparison of the IAQ parameter with an OFF threshold. A clean module is configured to determine a clean value for the IAQ parameter. A thresholds module is configured to, based on the clean value, determine the first ON threshold and the OFF threshold.
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a building is disclosed. The monitoring system includes at least one processor and a computer readable medium that includes instructions executable by the at least one processor. The instructions include: determining a capacity of a filter of the HVAC system based at least on dimensions of the filter; determining a threshold based on the capacity of the filter; monitoring a state of a circulator blower of the HVAC system; and calculating a filter usage based on the state of the circulator blower and one of (i) a power consumed by the circulator blower and (ii) an operation mode of the HVAC system. The instructions also include generating, in response to the filter usage exceeding the threshold, an alert suggesting replacement of the filter.
First and second IAQ sensors are located within a building and are configured to measure first and second IAQ parameters, respectively, the first and second IAQ parameter being the same one of: relative humidity; amount of particulate; amount of volatile organic compounds; and amount of carbon dioxide. A mitigation device is separate from an HVAC system and includes a control module configured to turn the mitigation device on and off based on the first IAQ parameter, the second IAQ parameter, and whether the HVAC system is on or off. A mitigation module is configured to selectively turn the HVAC system on and off based on the second IAQ parameter, the first IAQ parameter, and whether the HVAC system is on or off.
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
An ice-maker system may be operable in an ice-making mode and in an ice-harvesting mode and may include a working-fluid circuit and an ice mold. The working-fluid circuit may include a compressor, an expansion device, and an ice-making heat exchanger. The expansion device is disposed downstream of the compressor. The ice-making heat exchanger is disposed between the expansion device and the compressor along the working-fluid circuit. The ice mold includes a plurality of pockets configured to receive water from a water-supply conduit when the system is operating in the ice-making mode. The ice mold may be in a heat-transfer relationship with the ice-making heat exchanger. The ice mold may define a channel that receives a warming fluid from a warming-fluid-supply conduit when the system is operating in the ice-harvesting mode. The warming fluid is fluidly isolated from working fluid circulating through the working-fluid circuit.
A climate-control system includes a working fluid circuit and a storage tank. The working fluid circuit has a first compressor, a first heat exchanger, a second heat exchanger, a flash tank, and a third heat exchanger. The first heat exchanger receives working fluid discharged from the first compressor. The flash tank is disposed downstream the first heat exchanger and includes an inlet and first and second outlets. The first outlet provides working fluid to the third heat exchanger disposed between the flash tank and the first compressor. The second outlet provides working fluid to the first compressor. The storage tank contains phase-change material that is thermally coupled with the second heat exchanger of the working fluid circuit.
A climate control system includes an electrochemical device in fluid communication with at least one fluid conduit that also includes a first heat exchanger, an expansion device, and a pump, but may be free of any condensers. A working fluid is circulated in the fluid conduit that has a composition that undergoes a reversible hydrogenation and dehydrogenation reaction when it passes through the electrochemical device when a potential is applied thereto. The climate control system includes a heat rejection system in the form of a recirculation loop having a second heat exchanger configured to cool a portion of the working fluid exiting the electrochemical device and a recirculation pump that circulates the portion of the working fluid exiting the electrochemical device through the second heat exchanger and back to an inlet of the electrochemical device. Methods for rejecting heat from an electrochemical climate control system are also provided.
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
F25B 15/09 - Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being hydrogen desorbed from a hydride
A climate-control system may include a first working fluid circuit, a second working fluid circuit and a storage tank. The first working fluid circuit includes a first compressor and a first heat exchanger in fluid communication with the first compressor. The second working fluid circuit includes a second compressor and a second heat exchanger in fluid communication with the second compressor. The storage tank contains a phase-change material. The first working fluid circuit and the second working fluid circuit are thermally coupled with the phase-change material contained in the storage tank.
F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
An indoor air quality (IAO) system comprises a temperature sensor is configured to measure a temperature of air within a building, a relative humidity (RH) sensor is configured to measure a RH of the air within the building and at least one of a thermostat and an IAO control module is configured to, during cooling of the air within the building, based on the RH, control operation of: a blower of an air handler unit of a heating, ventilation, and air conditioning (HVAC) system of the building; and a compressor of a condenser unit of the HVAC system of the building. The at least one of the thermostat and the IAO control module is configured to, while the compressor is off: operate the blower at a first predetermined speed when the RH is less than a first predetermined RH but greater than a second predetermined RH; and operate the blower at a second predetermined speed that is greater than the first predetermined speed when the RH is less than the second predetermined RH.
F24F 11/70 - Control systems characterised by their outputs; Constructional details thereof
F24F 11/64 - Electronic processing using pre-stored data
F24F 3/14 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by dehumidification
F24F 3/044 - Systems in which all treatment is given in the central station, i.e. all-air systems
F24F 6/02 - Air-humidification by evaporation of water in the air
A climate-control system includes a variable-capacity compressor. An outdoor ambient temperature sensor indicates a temperature of the outdoor ambient air. A return air temperature sensor indicates a temperature of the return air in the system. A controller commands a startup compressor stage based on the temperature from the outdoor ambient temperature sensor and commands a running compressor stage based on a time-based slope of the temperature from the return air temperature sensor and the startup compressor stage.
F24F 11/86 - Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
F24F 11/64 - Electronic processing using pre-stored data
A scroll compressor can include a housing, a rod member, and a nut. The housing can define a first bore. The non-orbiting scroll can include a flange. The flange can define a second bore. The rod member can have a first axial end that is coupled to the housing. The rod member can extend from the first bore and through the second bore to a second axial end of the rod member. The rod member can include at least one set of external threads. The at least one set of external threads can be disposed about the second axial end of the rod member. The nut can be threadably engaged with the second axial end of the rod member. The second bore can be disposed axially between the nut and the housing. The primary forces acting within the rod member are tensile forces, while torsional shear forces are minimized.
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
