Abstract: An air-conditioning apparatus including heat source apparatuses each including a compressor and an accumulator includes: a refrigerant amount calculation unit that calculates an amount of the refrigerant accumulated in the accumulator in one of the heat source apparatuses that is to be controlled; a refrigerant differential amount calculation unit configured to calculate, when the number of the heat source apparatuses is two, a differential amount between the calculated amount and an amount of the refrigerant in the accumulator in the other heat source apparatus, and calculate, when the number of the heat source apparatuses is three or more, a differential amount between the calculated amount of the refrigerant and an average amount of amounts of the refrigerant accumulated in the accumulators in the heat source apparatuses; and a liquid equalization control unit that controls the heat source apparatus to be controlled, based on the calculated differential amount.

Abstract: A method of controlling injection into a compressor in a refrigeration cycle is described. A refrigeration cycle may comprise at least an economizer heat exchanger, a heat rejection heat exchanger, a first expansion device, and a compressor. A discharge port of the compressor is connected to the heat rejection heat exchanger via a discharge line and an injection port of the compressor is connected to the means for compressing. The economizer heat exchanger comprises a first path having an input connected to the heat rejection heat exchanger and an output connected to the first expansion device, and a second path having an input connected to the heat rejection heat exchanger via an economizer valve and an output connected to the injection port of the compressor via an injection line. The economizer valve is regulated based on a superheat level of the refrigerant in the economizer heat exchanger.

Abstract: A refrigeration system includes a first compressor system, a second compressor system, a first conduit, a heat exchanger, a second conduit, and a third conduit. The first compressor system includes a plurality of first compressors. The second compressor system includes a plurality of second compressors. The first conduit is configured to provide refrigerant from the first compressor system to the second compressor system. The second conduit is fluidly coupled to the first conduit and configured to provide the refrigerant from the first compressor system to the heat exchanger. The third conduit is configured to provide the refrigerant from the second compressor system to the heat exchanger.

Abstract: A rotary electric machine includes a stator extending along an axis and having teeth arranged about the axis. The teeth are circumferentially spaced apart by slots. Conductors extend around the teeth and through the slots. The conductors are electrically connected to one another to form phases. A cooling device is provided in at least one winding slot. The cooling device includes an outer tube and an inner tube provided in the outer tube such that cooling fluid flows in a first axial direction within the inner tube and a second axial direction opposite the first axial direction within the outer tube.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a conditioning system configured to condition a return air flow directed through the HVAC system and a control system configured to determine a difference value between an operating parameter value of the return air flow and a sensed operating parameter value of a space serviced by the HVAC system, retrieve a stored target operating parameter value of the space, and operate the HVAC system based on the difference value, the stored target operating parameter value, or both.

Abstract: A building management system includes a building efficiency improvement system and method configured to monitor and control subsystems and equipment for improved efficiency of operation. A user device is configured to display a user interface for monitoring and controlling one or more building equipment efficiency parameters and settings. The building efficiency management system further includes a controller configured to collect and analyze data from equipment, generate displays of the operational status and efficiency levels, generate sets of alternative equipment control algorithms based on efficiency objectives, and present users with a set of alternative equipment control algorithms displayed via graphic user interface elements on the user device. The user device further provides a means to select and implement an alternate equipment control algorithm.

Abstract: A compressor may include a compressor shell, a motor, a compression mechanism, an enclosure, a control module, a fan, and an airflow deflector. The compression mechanism is disposed within the compressor shell. The motor drives the compression mechanism. The enclosure defines an internal cavity. The control module is in communication with the motor and is configured to control operation of the motor. The fan 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 may 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, and a second portion of the air may flow from the base portion along the second leg.

Abstract: A filter cartridge device is disclosed, which includes a water stopping assembly (13) and automatic water locking assemblies (22); wherein the water stopping assembly (13) can control water supply or water cut-off of the filter cartridge device, and prevent residual water inside a filter cavity (111) from flowing out during the process of detaching the filter cartridge device; the automatic water locking assemblies (22) can control water supply or water cut-off between the filter cartridge device and an external pipe, and prevent water inside the external pipe from flowing out during the process of detaching the filter cartridge device; and the water stopping assembly (13) controls water supply or water cut-off of on its side. In addition, a water purifier comprising the filter cartridge device is also disclosed.

Abstract: When a controller receives an instruction for a heating operation, the controller switches an operation mode of a refrigeration cycle apparatus between a heating operation mode and an oil recovery operation mode. The heating operation mode is a mode to circulate refrigerant in a refrigerant circuit such that the refrigerant flows through a gas extension pipe in a gas phase state. The oil recovery operation mode is a mode to circulate the refrigerant in the refrigerant circuit such that the refrigerant flows in the gas extension pipe in a gas-liquid two-phase state. The direction in which the refrigerant flows in the gas extension pipe in the oil recovery operation mode is opposite to that in which the refrigerant flows in the gas extension pipe in the heating operation mode.

Abstract: A refrigerant cycle apparatus, that circulates a flammable refrigerant in a refrigerant circuit, includes: a gas-side cutoff valve; a liquid-side cutoff valve, where the gas-side cutoff valve and the liquid-side cutoff valve are disposed on opposite sides of a first portion of the refrigerant circuit; a detection unit that detects refrigerant leakage from the first portion into a predetermined space; and a control unit that sets a cutoff state in the gas-side cutoff valve and the liquid-side cutoff valve when the detection unit detects the refrigerant leakage from the first portion into the predetermined space. The cutoff leakage rate at the gas-side cutoff valve is higher than the cutoff leakage rate at the liquid-side cutoff valve.

Abstract: A refrigerator includes: a cabinet including a freezing chamber; an evaporator located at one side of the freezing chamber; a freezing chamber fan configured to supply cool air to the freezing chamber; an ice maker located in the freezing chamber and configured to perform ice-making; an ice bin located below the ice maker and separates and stores ice made in the ice maker; an ice detection device which detects whether or not the ice stored in the ice bin is full; and a control unit configured to control the freezing chamber fan according to a detection signal of the ice detection device. The control unit is configured to turn off the freezing chamber fan when ice-fullness is detected by the ice detection device and turn on the freezing chamber fan when the ice-fullness is not detected by the ice detection device.

Abstract: Excessive specifications of a shutoff valve leads to increase in production cost. An air conditioner configured to circulate a lower flammability refrigerant in a refrigerant circuit includes a first shutoff valve and a second shutoff valve configured to inhibit refrigerant leakage into a predetermined space. Each of the first shutoff valve and the second shutoff valve in a shutoff state has a shutoff leakage rate, as an air leakage rate in a case where fluid is air at 20° C. and a differential pressure between upstream and downstream of the valve is 1 MPa, more than 300 (cm3/min) and less than 300×R (cm3/min). R satisfies R = ( ? md × V md × A d ) ? / ? ( C r × ( 2 × ? ? ? P r ? / ? ? 1 ? rl ) 0.5 × A v × ? 1 ? rl + A v × ( 2 ? / ? ( ? + 1 ) ) ( ( ? + 1 ) ? / ? 2 ? ( ? - 1 ) ) × ( ? × P 1 ? r × ? 1 ? rg ) 0.5 ) .

Abstract: Method for regulation of a single-valve CO2 refrigerating apparatus including: an operation A of detecting, over time, the value of a primary parameter and the value of a secondary parameter, wherein said primary parameter is chosen from said high pressure HP and said superheat temperature Tsh, wherein said secondary parameter is said superheat temperature Tsh if said primary parameter is said high pressure HP or is said high pressure HP if said primary parameter is said superheat temperature Tsh; a primary regulation operation B, which involves regulation of said expansion valve (13) so that the value of said primary parameter tends towards a set-point value; an operation C of estimating an optimal value Vo for said secondary parameter; and a secondary regulation operation D which involves varying said set-point value from an optimal set-point value or from a current value if the value of said secondary parameter does not fall within a predefined tolerance range.

Abstract: A heating, ventilation, and air conditioning system in which a primary water loop is used as a heat transfer reservoir for both heating and cooling. A plurality of micro chillers are provided, with each micro chiller being connected to the primary water loop. Each micro chiller includes its own heat engine. Each micro chiller includes one or more fan control units that exchange heat between the micro chiller and the air in a building. In a first mode a micro chiller transfers heat from the air in the building to the water circulating within the primary water loop. In a second mode the micro chiller transfers heat from the water circulating in the primary water loop to the air in the building. A primary water loop regulation system is provided to control the temperature of the water circulating in the primary water loop.

Abstract: A rotary electric machine includes a stator extending along an axis and having teeth arranged about the axis. The teeth are circumferentially spaced apart by slots. Conductors extend around the teeth and through the slots. The conductors are electrically connected to one another to form phases. A cooling device is provided in at least one winding slot. The cooling device includes an outer tube and an inner tube provided in the outer tube such that cooling fluid flows in a first axial direction within the inner tube and a second axial direction opposite the first axial direction within the outer tube.

Abstract: A refrigeration apparatus includes first and second refrigeration circuits, and a supercooling circuit. The supercooling circuit includes a supercooling bypass flow path which communicates a part of the first refrigeration circuit positioned on the downstream side of the condenser and on the upstream side of the first expansion valve, to a compressor on the first refrigeration circuit; a supercooling control valve; and a supercooling heat exchanger disposed on the downstream side of the supercooling control valve in the supercooling bypass flow path. The supercooling heat exchanger is configured to cool the refrigerant flowing through a part of the first refrigeration circuit, on the downstream side of a connection position to the supercooling bypass flow path. The second refrigeration circuit includes: a branch flow path which branches from a part of the first refrigeration circuit, on the upstream side of the connection position to the supercooling bypass flow path.

Abstract: An air conditioning system capable of reducing noise incidental to gas-liquid two-phase transfer is provided. The air conditioning system (100) performs a refrigeration cycle in a refrigerant circuit (RC) including an outdoor unit (10), a plurality of indoor units (40), and a liquid-side connection pipe (LC) connecting the outdoor unit (10) and the indoor units (40). The air conditioning system (100) includes a second outdoor control valve (17, electric valve) decompressing the refrigerant flowing in the refrigerant circuit (RC) in accordance with an opening degree, an operating-capacity variation detection portion (74, detection portion) detecting change of the number of operating units in accordance with device information, and a device control portion (75, control portion) controlling a state of the second outdoor control valve (17).

Abstract: An air conditioner includes a liquid pressure adjusting expansion valve that is located in an outdoor liquid refrigerant pipe at a part thereof closer to a liquid refrigerant communication pipe than to a refrigerant cooler and configured to reduce a pressure of a refrigerant so that a refrigerant flows through the liquid refrigerant communication pipe in a gas-liquid two-phase state and so that the refrigerant flows through an outlet of a refrigerant cooler in a liquid state.

Abstract: Provided is a transport device which can perform easily thermal storage temperature controlling treatment of the thermal storage material even at a cell transport destination. The transport device of the present invention includes: a thermally insulated container that has a cylindrical shape and a bottom, a thermal storage material disposed along the inner circumferential surface of the thermally insulated container, and a temperature control unit that is detachably fitted on the thermally insulated container and is for performing thermal storage temperature controlling treatment on the thermal storage material, wherein the temperature controlling unit comprises a heat transferring body for performing the thermal storage temperature control processing on the thermal storage material when the unit is fitted on the thermally insulated container, and a storage space formed inside the heat-transferring body for storing a stored object so that the object can be freely put in and taken out.

Abstract: A secure delivery container can have a body with a chamber that can receive one or more items for delivery to an end recipient and a door actuatable to close the chamber in a locked position and open to allow access to the items. The container can have a heat transfer system with one or more heat transfer elements in thermal communication with one or more surfaces of the body that define the chamber and configured to heat or cool the one or more surfaces to heat or cool the delivery items in the chamber. The container can wirelessly communicate with a remote electronic device to receive information from the remote electronic device and to communicate operational information from the one or more heat transfer elements to the remote electronic device.

Abstract: A heating, ventilation, air conditioning, and refrigeration (HVACR) system is disclosed. The HVACR system includes a refrigerant circuit. The refrigerant circuit includes a compressor, a condenser, an expansion device, and an evaporator fluidly connected. A controller is electronically connected to the compressor. The controller is configured to prevent the compressor from operating at a speed that is less than a minimum speed limit. A lubricant separator has an inlet fluidly connected between the compressor and the condenser and a plurality of outlets. A first of the plurality of outlets is fluidly connected to the condenser. A second of the plurality of outlets is fluidly connected to one or more components of the compressor to provide a lubricant to the one or more components.

Abstract: A cooling system uses refrigerants for two-phase cooling and thermal energy storage for a transient heat source. The cooling system includes a flash tank downstream of a heat load to be cooled. A subcooler/super-heater is downstream of the flash tank. A compressor is downstream of the subcooler/super-heater. A condenser is downstream of the compressor and upstream of the flash tank.

Abstract: A water purifier includes a cooling water tank, a partition member mounted inside the cooling water tank and partitioning an inner space of the cooling water tank into an upper space and a lower space, a cold water pipe accommodated in the lower space; an evaporator accommodated in the upper space, and an agitator penetrating the partition member and disposed in the lower space. The partition member includes a bottom portion on which the evaporator is mounted and that defines a plurality of cooling water through-holes, and an outer wall portion extending upward along an edge of the bottom portion to define an evaporator accommodating portion. The outer wall portion is spaced apart from an inner wall of the cooling water tank to prevent ice formed in the evaporator accommodating portion from contacting the inner wall of the cooling water tank.

Abstract: A refrigeration apparatus includes a refrigerant circuit including a utilization unit. The utilization unit includes: a heat exchanger; first and second refrigerant pipes connected to the heat exchanger; and first and second shutoff valves each of whose opening degrees are adjustable and which are respectively provided at the first refrigerant pipe and the second refrigerant pipe. The refrigeration apparatus includes: a refrigerant leakage detector; a refrigerant pressure acquiring part; and a controller configured to adjust the opening degrees of the first shutoff valve and the second shutoff valve. In an alert state where the first shutoff valve and the second shutoff valve are both closed and the refrigerant leakage detector detects the leakage, the controller adjusts the opening degree of at least one of the first and second shutoff valves to open when the pressure of the refrigerant is greater than a predetermined threshold value.

Abstract: Provided is a height difference setting system capable of setting a transport capacity of refrigerant in an appropriate state. A height difference setting system (1) is constituted by a plurality of components. Information is communicated between the components, and accordingly a height difference between an outdoor unit (8) and an indoor unit (9) that constitute an air conditioner (7) installed on or in a building (6) is set. The height difference setting system (1) includes components that function as an outdoor unit height information obtaining unit (2), an indoor unit height information obtaining unit (3), a height difference setting unit (4), and a transport capacity adjusting unit (5).

Abstract: An electric dispensing kettle system with a dispensing kettle seats on to and docks to a control station. The dispensing kettle includes a weighted handle for controlled or balanced pouring. The control station provides controlled power to a heating element within the dispensing kettle with the dispensing kettle seated on to docked to the control station. The control sation includes a PID controller or control loop feedback circuit that continuously modulates power to the heating element based on actual temperature reading received from a thermocouple structure. The control station also includes an electronic dispaly that simultaneously displays an actual temperature of the steeping liquid and the target temperature of the steeping liquid within the dispensing kettle.

Abstract: A CO2 refrigeration system for an ice-playing surface comprises an evaporation stage in which heat is absorbed from an ice-playing surface. CO2 compressors in a compression stage compress CO2 refrigerant subcritically and transcritically. A gas cooling stage has a plurality of heat-reclaim units reclaiming heat from the CO2 refrigerant. A pressure-regulating device is downstream of the gas cooling stage, to control a pressure of the CO2 refrigerant in the gas cooling stage. A reservoir is downstream of the pressure-regulating device for receiving CO2 refrigerant in a liquid state. A controller operates the pressure-regulating device to control the pressure of the CO2 refrigerant in the gas cooling stage as a function of the heat demand of the plurality of heat-reclaim units, the controller causing the pressure of the CO2 refrigerant to reach a transcritical level as a function of a heat demand of the plurality of heat-reclaim units.

Abstract: A transportation refrigeration unit includes an evaporator 32 circulating a flow of refrigerant therethrough to cool a flow of supply air flowing over the evaporator. Two compressors 36,38 are in fluid communication with the evaporator to compress the flow of refrigerant and are configured and connected to operate in parallel with one another. A condenser 44 is in fluid communication with the evaporator and the two compressors. An economizer heat exchanger 56 and a suction line heat exchanger 68 are provided.

Abstract: When refrigerant leakage occurs, a controller in an air conditioner performs first shutoff control to open a liquid relay shutoff valve and close an indoor expansion valve and a gas relay shutoff valve on the basis of information from a refrigerant leakage detector.

Abstract: An air-conditioning apparatus includes a refrigeration cycle circulating refrigerant and connecting a compressor, a heat-source-side heat exchanger, one or more of load-side expansion devices, and one or more of load-side heat exchangers by refrigerant pipes, a bypass having one end connected to a discharge side of the compressor of the refrigeration cycle and the other end connected to a suction side of the compressor of the refrigeration cycle to bypass a portion of the refrigerant discharged from the compressor, a first expansion device depressurizing the refrigerant flowing through the bypass, an auxiliary heat exchanger cooling the refrigerant depressurized at the first expansion device, a second expansion device controlling a flow rate of the refrigerant flowing from the auxiliary heat exchanger to the suction side of the compressor, and a controller controlling an opening degree of the second expansion device.

Abstract: In a temperature control system using a controlled mix of high temperature pressurized gas and a cooled vapor/liquid flow of the same medium to cool a thermal load to a target temperature in a high energy environment, particular advantages are obtained in precision and efficiency by passing at least a substantial percentage of the cooled vapor/liquid flow through the thermal load directly, and thereafter mixing the output with a portion of the pressurized gas flow. This “post load mixing” approach increases the thermal transfer coefficient, improves control and facilities target temperature change. Ad added mixing between the cooled expanded flow and a lesser flow of pressurized gas also is used prior to the input to the thermal load. A further feature, termed a remote “Line Box”, enables transport of the separate flows of the two phase medium through a substantial spacing from pressurizing and condensing units without undesired liquefaction in the transport lines.

Abstract: A system for starting a refrigeration system includes a liquid line regulating valve, a liquid line charging valve, a suction line expansion valve, a suction line charging valve, and a controller. The controller is configured to override normal operation of the refrigeration system and transmit a demand signal to enable partial system operation. The controller is configured to operate the liquid line regulating valve and the liquid line charging valve to charge a receiver tank, gradually increase the demand signal to a predetermined level of partial system operation, and release the liquid line charging valve to normal operation. The controller is configured to operate the suction line expansion valve and the suction line charging valve to charge a suction line, gradually increase the demand signal to full system operation, and release the liquid line regulating valve, the suction line expansion valve, and the suction line charging valve to normal operation.

Abstract: A dialysis service box for centralized control and plumbing arrangement of a dialysis machine is disclosed. The dialysis service box includes a plumbing arrangement with a warm water inlet and a cold water inlet in fluid flow communication with a temperature mixing component. The thermostatic mixing component mixes the cold water and the warm water to produce mixed water maintained at a predetermined temperature between the temperature of the cold water and the temperature of the warm water. The dialysis service box can be universally installed to operate, control and adjust any dialysis machine that requires supply connection, waste connection, backflow preventer, thermostatic mixing component, a trap primer, or any combination of the foregoing.

Abstract: A suction modulation valve is throttled when conditions in a refrigerant system indicate that an undesirable amount of liquid refrigerant might otherwise be delivered to the compressor. As an example, the throttling would occur at start-up, among other conditions. Throttling the suction modulation valve reduces the amount of refrigerant reaching the compressor and thus ensures that any liquid refrigerant would be likely “boiled off” before raising any problems in the compressor. Other control steps can also be performed to alleviate flooded compressor operation with liquid refrigerant. Such steps, for example, can include actuating heaters, discharge valve throttling, by-passing refrigerant from an intermediate compression point back to suction, controlling the speed of the condenser fan can be performed independently or in combination including the suction modulation valve throttling.

Abstract: A refrigerator having a freezer compartment and a refrigerator compartment that circulates a plurality of individual refrigerating cycles using a plurality of compressors so as to individually cool the freezer compartment and the refrigerator compartment. The refrigerator includes a plurality of compressors, a plurality of condensers, a plurality of expansion valves, and a plurality of evaporators. One of the plurality of condensers is disposed in a machine compartment and the other condenser is disposed outside the machine compartment so that a heat dissipation effect of the machine compartment may be improved and arrangement availability may be increased. Also, the refrigerator includes a plurality of compressors, a dual path condenser, a plurality of expansion valves, and a plurality of evaporators. The dual path condenser may have a plurality of individual condensation paths.

Abstract: In some embodiments, a refrigeration device includes: walls substantially forming a liquid-impermeable container configured to hold phase change material internal to the refrigeration device; at least one active refrigeration unit including a set of evaporator coils positioned at least partially within the liquid-impermeable container; a unidirectional thermal conductor with a condensing end and an evaporative end, the condensing end positioned within the liquid-impermeable container; a first aperture in the liquid-impermeable container, the first aperture of a size, shape and position to permit the set of evaporator coils to traverse the aperture; a second aperture in the liquid-impermeable container, the second aperture including an internal surface of a size, shape and position to mate with an external surface of the unidirectional thermal conductor; and one or more walls substantially forming a storage region in thermal contact with the evaporative end of the unidirectional thermal conductor.

Abstract: A method of monitoring and controlling temperature of a cargo in a refrigerated transportation cargo container includes measuring a temperature of a plurality of portions of the cargo located in the cargo container via a plurality of temperature sensors directed at the portions of the cargo. One or more of the measured cargo temperatures are compared to a preselected threshold. Operation of a refrigeration unit disposed at the cargo container in operable communication with the plurality of temperature sensors is changed based on a result of the comparison. A transportation cargo container refrigeration system includes a plurality of cargo temperature sensors configured to determine a temperature of at least portions of a cargo. A refrigeration unit and controller are connected to the refrigeration unit and the cargo temperature sensors to control operation of the refrigeration unit based on data received from the cargo temperature sensors.

Abstract: A combination air and ground source heating and/or cooling system. The system includes an indoor unit, an outdoor unit and an in-ground unit, each of which has a coil, an inlet line and an outlet line. The system also comprises a flow connector, a coupling and a controller. The controller is configured to control the flow connector and coupling so that the system is selectively operable in three different modes. In the first mode, refrigerant bypasses the coil of the outdoor unit, while, in the second mode, refrigerant bypasses the coil of the in-ground unit. In the third mode, refrigerant flows through the coils of the in-ground and outdoor units.

Abstract: A refrigerator includes a compressor compressing a refrigerant, a condenser condensing the refrigerant compressed in the compressor, a refrigerant tube guiding a flow of the refrigerant condensed in the condenser, an expansion device decompressing the refrigerant condensed in the condenser, and an evaporator evaporating the refrigerant decompressed in the expansion device. The evaporator includes an evaporation tube through which the refrigerant decompressed in the expansion device flows, a coupling tube through a refrigerant heat-exchanged with the refrigerant of the evaporator flows, and a heat-exchange fin coupled to the evaporation tube and the coupling tube.

Abstract: A refrigerator and a method for controlling a refrigerator are provided. The method may include driving a refrigerating cycle including a first evaporator and a second evaporator by activating at least one compressor, supplying refrigerant to the first and second evaporators by controlling a flow adjuster, recognizing whether the refrigerant is unequally introduced into the first or second evaporator, by sensing a temperature of the first or second evaporator through at least one temperature sensor, reducing supply of the refrigerant to the first or second evaporator into which the refrigerant is unequally introduced, by adjusting the flow adjuster, storing information about an operation time of the flow adjuster, recognizing whether the at least one temperature sensor has malfunctioned, and determining an operation time of the flow adjuster according to whether the at least one temperature sensor has malfunctioned.

Abstract: This invention hereof discloses a refrigerating capacity control device, a test apparatus and a refrigerating control method using the device. The refrigerating capacity control device comprises a compressor (2), a condenser (5), an evaporator (7), a controller (1), a pressure regulating valve (4), a throttling device (6), a control panel (13) for driving a hot-gas valve, and a hot-gas valve (11).

Abstract: An indoor unit of an air-conditioning apparatus includes a controller that controls a refrigeration cycle, an up/down air flow direction plate, and a left/right air flow direction plate, based on information of a person whose image is captured by an imaging device. When the refrigeration cycle is stopped, in a case where the face of the person detected by the imaging device remains stationarily facing the imaging device for a preset recognition time, the controller recognizes the person as one wishing the refrigeration cycle to be activated, and activates the refrigeration cycle.

Abstract: COP deteriorates when a dehumidification operation is executed. In an air conditioner of the present invention, an indoor heat exchanger includes an auxiliary heat exchanger 20 and a main heat exchanger 21 provided leeward from the auxiliary heat exchanger 20. When the air conditioner is driven in a predetermined dehumidification operation mode, a liquid refrigerant supplied to the auxiliary heat exchanger 20 fully evaporates midway in the auxiliary heat exchanger 20. For this reason, only an upstream part of the auxiliary heat exchanger functions as an evaporation region, and an area downstream of the evaporation region of the auxiliary heat exchanger 20 is a superheat region. When the load is high at the selection of a dehumidification operation to start driving, a cooling operation is started and then switching to the dehumidification operation is executed in accordance with the decrease in the load.

Abstract: A branch controller operates with a system for temperature and humidity control. The branch controller includes a fluid control system for controlling a flow of the liquid desiccant in an arrangement of channels forming a first path for exchanging the liquid desiccant between a liquid desiccant conditioning unit and at least a first space conditioning unit and a second path for directing the liquid desiccant received from the first space conditioning unit to a second space conditioning unit. The branch controller includes a processor for comparing operational conditions of the first space conditioning unit and the second space conditioning unit. The processor selects between the first path and the second path based on the comparison and commands the fluid control system to control the flow of the liquid desiccant according to the selected path.

Abstract: Feedwater to be supplied to a feedwater tank via a feedwater path is passed through a waste heat recovery heat exchanger, a supercooler, and a condenser in sequence. A heat source fluid such as heat source water is passed through an evaporator and the waste heat recovery heat exchanger in sequence. The waste heat recovery heat exchanger is an indirect heat exchanger between the feedwater supplied to the feedwater tank via the feedwater path and the heat source fluid having passed through the evaporator. The supercooler is an indirect heat exchanger between the feedwater supplied to the feedwater tank via the feedwater path and a refrigerant supplied from the condenser to an expansion valve.

Abstract: Method for improving efficiency of a chilled water system having a chiller unit, circulation pumps, a heat absorption unit and a heat rejection unit, including adjusting a temperature of at least one of a chilled water supply to the heat absorption unit and a condenser water supply from the heat rejection unit; measuring efficiency of the chiller unit and at least one of the circulation pumps, the heat absorption unit and the heat rejection unit; further adjusting temperature of at least one of the chilled water supply to the heat absorption unit and the condenser water supply from the heat rejection unit if the measuring the efficiency indicates an improved efficiency; and further adjusting the temperature of the at least one of the chilled water supply to the heat absorption unit and the condenser water supply from the heat rejection unit if measuring the efficiency indicates worsened efficiency.

Abstract: An outdoor heat exchanger includes tube-outside heat transfer coefficient adjusting means configured to adjust a heat transfer coefficient ?o of the outside of a heat transfer tube through which a refrigerant flows, tube-inside heat transfer coefficient adjusting means configured to adjust a heat transfer coefficient ?i of the inside of the heat transfer tube through which the refrigerant flows, and heat transfer area adjusting means configured to adjust a heat transfer area A where the refrigerant exchanges heat with a heat medium. A controller controls the heat transfer coefficient ?o of the outside of the heat transfer tube, the heat transfer coefficient ?i of the inside thereof, and the heat transfer area A to control a heat exchange amount of the outdoor heat exchanger.

Abstract: In a temperature control system using a controlled mix of high temperature pressurized gas and a cooled vapor/liquid flow of the same medium to cool a thermal load to a target temperature in a high energy environment, particular advantages are obtained in precision and efficiency by passing at least a substantial percentage of the cooled vapor/liquid flow through the thermal load directly, and thereafter mixing the output with a portion of the pressurized gas flow. This “post load mixing” approach increases the thermal transfer coefficient, improves control and facilities target temperature change. Ad added mixing between the cooled expanded flow and a lesser flow of pressurized gas also is used prior to the input to the thermal load. A further feature, termed a remote “Line Box”, enables transport of the separate flows of the two phase medium through a substantial spacing from pressurizing and condensing units without undesired liquefaction in the transport lines.

Abstract: A setting unit acquires the temperature of an air-conditioned space, calculates the difference between the temperature of the air-conditioned space and a suction temperature as a correction amount ?T, and transmits information of the correction amount ?T to an air-conditioning apparatus. A controller of the air-conditioning apparatus controls the operation of the air-conditioning apparatus so that a control temperature obtained by adding the correction amount ?T to the suction temperature becomes equal to a set temperature.

Abstract: A cooling system and a control method thereof are provided. The cooling system may include a first compressor, a second compressor disposed downstream of the first compressor, an outdoor heat exchanger the performs heat exchange between refrigerant compressed in the first and/or second compressor and external air, an expansion device that decompresses the refrigerant condensed in the outdoor heat exchanger, a cooling evaporator evaporating the refrigerant decompressed in the expansion device, a bypass tube that guides refrigerant compressed in the first compressor to the outdoor heat exchanger, bypassing the second compressor, and a valve device controlling the flow of refrigerant discharged from the first compressor so as to selectively introduce refrigerant into the second compressor.