Abstract: A refrigeration system including a storage in which multiple containers are joined and each include a refrigeration apparatus includes a first communication unit, a second communication unit, and a third communication unit that perform communication so that the refrigeration apparatuses of the containers operate in synchronization with each other.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a reversible valve having an outlet configured to direct refrigerant to a reheat heat exchanger of the HVAC system. The reversible valve is further configured to be in a first configuration to direct the refrigerant through a refrigerant circuit in a first flow direction in a heating mode of the HVAC system and to be in a second configuration to direct the refrigerant through the refrigerant circuit in a second flow direction in a cooling mode of the HVAC system.

Abstract: A refrigeration system including a storage in which multiple containers are joined and each include a refrigeration apparatus includes a first communication unit, a second communication unit, and a third communication unit that perform communication so that the refrigeration apparatuses of the containers operate in synchronization with each other.

Abstract: A refrigerator is provided. The refrigerator includes a main body including a first door, a door opening device configured to open the first door, a first proximity sensor disposed adjacent to the first door, a first infrared sensor disposed on the first door, and at least one processor, wherein the at least one processor is configured to, based on detection data obtained by the first proximity sensor, control the door opening device to open the first door based on an external object approaching within a threshold distance from the refrigerator, and based on the external object being identified based on detection data obtained by the first infrared sensor while the first door is open, control the door opening device to stop opening of the first door.

Abstract: A refrigerator is provided. The refrigerator includes a main body including a first door and a second door, a door opening device configured to open the first door and the second door, a first proximity sensor disposed adjacent to the first door, a second proximity sensor disposed adjacent to the second door, and a processor, and the processor may control the first proximity sensor and the second proximity sensor to operate alternately, based on sensing data obtained by the first proximity sensor and the second proximity sensor, identify a door close to an external object that approaches within a threshold distance from the refrigerator, and control the door opening device to open the identified door among the first door and the second door.

Abstract: The system can include an on-board thermal management subsystem. The system 100 can optionally include an off-board (extravehicular) infrastructure subsystem. The on-board thermal management subsystem can include: a battery pack, one or more fluid loops, and an air manifold. The system 100 can additionally or alternatively include any other suitable components.

Abstract: An electronic apparatus includes a memory configured to store an artificial intelligence model, and a processor configured to obtain data associated with a fan motor of the electronic apparatus, obtain a freezing degree of the fan motor by inputting the obtained data associated with the fan motor to the artificial intelligence model which is trained to output the freezing degree of the fan motor based on the inputting of the obtained data associated with the fan motor, identify whether to perform an operation in relation to the obtained freezing degree of the fan motor, and provide, based on identifying that the operation in relation to the obtained freezing degree of the fan motor is to be performed, notification information.

Abstract: A control method for controlling a refrigerator includes a first step for driving a compressor for compressing a refrigerant and a fan for moving air, a second step for driving the compressor and stopping the fan, a third step for stopping the compressor and driving the fan, and a fourth step for stopping the compressor and the fan.

Abstract: A temperature control system for a refrigerator. The temperature control system is positioned in a refrigerated compartment and fluidly communicates with a cooling fan. The temperature control system includes a vertical partition having a front surface and a rear surface. The rear surface faces a rear wall of the refrigerated compartment and the front surface faces an open end of the refrigerated compartment. An air passage is formed in the vertical partition extending from a lower portion of the vertical partition to an upper portion of the vertical partition. A heater assembly is disposed between the front surface and the rear surface of the vertical partition proximate the air passage wherein air conveyed along the air passage is heated by the heater assembly when the heater assembly is energized.

Abstract: An electronic apparatus includes a memory configured to store an artificial intelligence model, and a processor configured to obtain data associated with a fan motor of the electronic apparatus, obtain a freezing degree of the fan motor by inputting the obtained data associated with the fan motor to the artificial intelligence model which is trained to output the freezing degree of the fan motor based on the inputting of the obtained data associated with the fan motor, identify whether to perform an operation in relation to the obtained freezing degree of the fan motor, and provide, based on identifying that the operation in relation to the obtained freezing degree of the fan motor is to be performed, notification information.

Abstract: An air supply assembly for a refrigerator, includes: an air duct cover plate defining, together with a refrigerator liner, an air supply space and configured to isolate the air supply space from a storage space in a compartment of the refrigerator, and a centrifugal wind wheel arranged in the air supply space, and axially sucking air in and blowing the air out towards a peripheral side, wherein a plurality of air return ports are provided in the air duct cover plate to allow air in the storage space to enter the air supply space; and the centrifugal wind wheel abuts against an inner side of the air duct cover plate and is configured to suck air in from a rear side thereof, such that air entering the air supply space via the air return ports is sucked in from the rear side of the centrifugal wind wheel.

Abstract: A system and method for minimizing indoor infection risk and improving indoor air quality (IAQ) while maximizing energy savings. The system integrates occupancy detection and forecasting, outdoor weather conditions and forecasting, indoor infection risks and air quality modeling, any tunable air filtration, the clean air delivery rate, and any portable air cleaners. The system outputs the total amount of outdoor air intake, the air temperature of the supply air into the space, the supply air flow rate into the space, the operation mode of tunable air filtration/purification/disinfection, the operation mode of the in-room air cleaner, and space/room temperature set-points, and thus can serve as the central controller for an HVAC system.

Abstract: A method for activating a pre acclimatization system of the passenger compartment of a vehicle includes monitoring an operational state of the vehicle, including a first state in which the vehicle is on and a second state in which the vehicle is off. In the second state, the method includes monitoring a plurality of conditions, the conditions selected from a group including current time and date, a driver appointment schedule, a historical database, wherein the monitoring step is performed by a system controller incorporated into the vehicle. The method further includes determining the most probable time of departure of the vehicle from a present location based on the plurality of conditions monitored by the system controller, suggesting time of departure to the driver, monitoring reply from the driver, setting timer for activating the pre acclimatization according to reply from the driver, and activating sleep mode for the vehicle systems.

Abstract: A thermal energy system for use with an aircraft includes a cooling loop and a cooler. The cooling loop includes a fluid conduit and a pump configured to move fluid through the fluid conduit to transfer heat from a heat source to the fluid in the fluid conduit to cool the heat source. The cooler includes an air-stream heat exchanger located in a duct and is in thermal communication with the fluid conduit to transfer heat between the fluid in the cooling loop and the air passing through the duct.

Abstract: A cryogenic cooling system for an aircraft includes a first air cycle machine, a second air cycle machine, and a means for collecting liquid air. The first air cycle machine is operable to output a cooling air stream based on a first air source. The second air cycle machine is operable to output a chilled air stream at a cryogenic temperature based on a second air source cooled by the cooling air stream of the first air cycle machine. An output of the second air cycle machine is provided to the means for collecting liquid air.

Abstract: High-efficiency cooling is performed in a data center in response to a cooling and/or humidity demand using a system having multiple cooling loops. The system includes a plurality of integrated cooling systems each comprising one or more specifically sized chillers and a liquid loop to address the cooling demand. A free cooling heat exchanger is coupled to the first liquid loop for use when a wet-bulb temperature surrounding the data center is at or below a free cooling set point of the first chilled liquid loop. The system isolates humidity control components to a second chilled liquid loop, and enables greater control of the first chilled liquid loop of the data center to meet specific IT loads.

Abstract: A method of making a data centre is disclosed, comprising making a data centre in an existing building (3010) having a floor, walls and a roof, an air inlet and an air outlet. The method includes: installing prefabricated data centre elements by (a) connecting to the inlet an air handling module (3001, 3002); and (b) installing cold aisle services modules (3011) each having one or more integrated blanking portions and one or more data centre services extending along its length terminating with a connection to an adjacent module (3011); and installing racks of IT equipment arranged in parallel rows; the method being so performed that the floor, racks, and cold aisle services modules (3011) together define parallel cold aisles for entraining cooling air flows to the IT equipment. Also disclosed are a data centre, a service carrying frame and a cold aisle services module for a data centre and a supporting frame for supporting prefabricated data centre elements.

Abstract: A refrigerator according to an embodiment includes: a duct dividing the inside of a storage compartment body into a storage compartment and an air channel and having a main discharge port and a sub-discharge port; an air guide dividing the air channel into a first channel communicating with the main discharge port and a second channel guiding air in the first channel to the sub-discharge port; a heat exchanger provided in the first channel; and a fan suctioning air in the storage compartment and sending the air to the first channel. According to the refrigerator, it is possible to maximize the volume of the storage compartment and separately discharge air to the main discharge port and the sub-discharge port, using a simple structure.

Abstract: A shutter includes a window frame, a plurality of blade structures, an intake driving unit and an airflow guiding unit. The window frame has an upper frame portion, a lower frame portion and two side frame portions. The blade structures are disposed on the window frame, and each has a through hole and a plurality of outlets. The intake driving unit is disposed in the upper frame portion. The airflow guiding unit is disposed in at least one of the two side frame portions. Each of the through holes of the blade structures communicates with the inside of at least one of the two side frame portions.

Abstract: Systems to produce cabin supply air for aircraft and related methods are described herein. An example system includes an air conditioning pack including a heat exchanger including a first flow path and a second flow path isolated from the first flow path. The second flow path is to receive cabin exhaust air from a cabin of an aircraft. The cabin exhaust air is to reduce a temperature of the cabin supply air flowing through the first flow path of the heat exchanger. The system also includes a turbine to receive the cabin supply air from the heat exchanger. The turbine is to reduce a temperature and pressure of the cabin supply air. A turbine outlet of the turbine is fluidly coupled to the cabin to provide the cabin supply air to the cabin. The system further includes a fan to direct the cabin exhaust air from the heat exchanger.

Abstract: Detecting a thermostat call for heating or cooling based on detecting a heat W or compressor Y signal is activated and energizing a fan signal output and operating a system fan/blower while the W or Y signal is activated and energizing the fan signal and operating the fan for a variable fan-off delay immediately after the W or Y signal is de-activated and de-energizing the fan signal and not operating the fan after the variable fan-off delay when a fan G signal is not activated. Detecting the fan G signal is activated and the W or Y signal is not activated indicating a fan-on duration control selected by a user, and energizing the fan signal and operating the fan while the fan G signal is activated and de-energizing the fan signal and not operating the fan and not providing the variable fan-off delay when the fan G signal is de-activated.

Abstract: The present invention provides a storage device, including: a box body, a gas separator, and a gas extractor, wherein the gas extractor is communicated with the gas separator. The storage device of the present invention may form a nitrogen-rich and oxygen-deficient atmosphere beneficial to food freshness preservation.

Abstract: A controller of a heating, ventilation, and air conditioning (HVAC) system, the controller comprising instructions that cause the controller to determine an air flowrate of an air blower of the HVAC system and calculate a threshold value based on a minimum required air flowrate. The controller further comprises instructions that cause the controller to send a notification to an operator of the HVAC system indicating that the air flowrate of the air blower is less than the threshold value in response to determining that the air flowrate of the air blower is less than the threshold value and shut down the HVAC system such that the refrigerant is no longer circulated by the componentry of the HVAC system in response to determining that the air flowrate of the air blower is less than the minimum required air flowrate.

Abstract: A shipping container is provided and includes a structural frame defining an interior, a transport refrigeration unit (TRU) and a control system. The TRU includes an inlet through which air is drawn from a lower region of the interior, a refrigeration unit configured to cool the air drawn from the lower region of the interior through the inlet and an outlet through which air cooled by the refrigeration unit is exhausted toward an upper region of the interior. The control system is configured to control an exhaustion of the air cooled by the refrigeration unit toward the upper region of the interior to maintain a predefined environmental condition within the interior.

Abstract: The method for controlling the refrigerator includes operating a first cooling cycle for cooling the first storage compartment to operate the compressor and operating a first fan for the first storage compartment, and switching the first cooling cycle to a second cooling cycle for cooling the second storage compartment to operate the compressor and operating a second fan when a stop condition of the first cooling cycle is satisfied. A temperature of each storage compartment is sensed at sampling time intervals in each cooling cycle. Further, a cooling power of the compressor is determined for each sampling time based on a sensed current temperature of the storage compartment, and the compressor is operated at the determined cooling power.

Abstract: A fan control method is described. The method includes obtaining, after controlling a fan to enter a scene wind running mode, the sleep time of a particular user corresponding to the scene wind running mode, obtaining a gear control time sequence of the fan according to the sleep time of the particular user, and controlling the fan according to the gear control time sequence of the fan to adjust the wind speed of the fan. The method can provide gentler wind during sleep of particular users such as babies and pregnant women to prevent the users from catching a cold, and also can provide a quitter sleep environment for babies and pregnant women to improve their sleep quality.

Abstract: A device for fruit and vegetable phase-temperature precooling compatible multi-coupling anti-aging treatment comprises a refrigeration house with a plurality of differential pressure precooling devices placed therein. The differential pressure precooling device comprises a hermetic seal tunnel precooling box, a separator plate is fixedly mounted at an upper part inside the tunnel precooling box and in parallel to a top wall of the tunnel precooling box with a space formed therebetween; the separator plate extends to the bottom of the tunnel precooling box; a venting plate is fixedly mounted to one side of the separator plate and in parallel to a side wall of the tunnel precooling box with a space formed therebetween; a section of wind shield is vertically and downwardly mounted to an end of the other side of the separator plate; an axial flow fan is mounted at a corner of the tunnel precooling box between the separator plate and the venting plate.

Abstract: The present invention relates to a temperature-context-aware refrigerator and a method for controlling the same. A temperature-context-aware refrigerator according to an embodiment of the present invention comprises: a temperature context awareness unit for sensing a temperature of at least one storage compartment, and when the difference between the sensed temperature and a temperature set for the corresponding storage compartment is equal to or greater than a predetermined level, generating load-responsive operation information including a target temperature lower or higher than the set temperature; a temperature control unit for controlling a temperature sensor and the temperature context awareness unit, and performing a load-responsive operation for controlling the temperature of the storage compartment by using the load-responsive operation information; and a database unit which is required for the temperature context awareness unit to generate the load-responsive operation information.

Abstract: Embodiments of the disclosure can relate to a ceiling mounted air distribution system for a railcar. According to one embodiment of the disclosure, a ceiling-mounted air distribution plenum may include: a diffuser configured to transmit air to at least one first air channel, the at least one first air channel having a first end configured to couple to the diffuser, a second end distal from the first end; at least one second air channel disposed proximate to and longitudinally with the at least one first air channel, the at least one second air channel having a first end configured to couple to the diffuser, a second end distal from the first end, and at least one air distribution hole, and at least one channel divider disposed to separate the at least one first air channel and the at least one second air channel.

Abstract: A method for controlling a fan of a dehumidifier includes performing a first step of obtaining an ambient temperature, an exhaust temperature, and a delta temperature that is a difference between the ambient temperature and the exhaust temperature. The method further include determining, after performing the first step, whether the delta temperature is within a delta temperature range. If the delta temperature is within the delta temperature range, the method proceeds back to the first step. If the delta temperature is not within the delta temperature range, the method performs a second step of determining an adjusted fan speed using the delta temperature. The method further includes performing, after performing the second step, a third step of setting the fan speed to the determined adjusted fan speed.

Abstract: A product storage device (1) includes: first and second product storage chambers (52, 53) for storing products and for cooling or heating the stored products; a product delivery port (31) to which a product stored in the first or second product storage chamber (52, 53) is dispensed; and a control unit (10) configured to set one of the first and second product storage chambers (52, 53) as a preliminary chamber in which stored products are not available for dispensing and set the other as a product dispensing chamber in which stored products are available for dispensing, and configured to sequentially change product storage chambers to be set as the preliminary chamber.

Abstract: Systems and methods for controlling temperature in an enclosed space can include an air-to-air heat exchanger (AAHX) and a direct evaporative cooler (DEC). The DEC can be located in a scavenger or outdoor air stream such that the DEC cools the outdoor air, which is then used to cool or reject heat from a process air stream passing through the AAHX. In an example, the AAHX can be a sensible wheel. In another example, the AAHX can be a counter-flow flat plate. The system can operate in various modes, including an economizer mode and an evaporation mode, depending, in part, on the outdoor air conditions and a load on the system. In some examples, the system can include a DX coil to provide additional cooling to the process air in another operating mode.

Abstract: An air cycle machine for an environmental control system for an aircraft is provided. The air cycle machine includes a compressor configured to compress a first medium, a turbine configured to receive second medium, a mixing point downstream of the compressor and downstream of the turbine; and a shaft mechanically coupling the compressor and the turbine.

Abstract: A control method of a refrigerator includes: determining whether a first temperature of a refrigerating compartment satisfies a first temperature condition; based the first temperature satisfying the first temperature condition, determining whether a second temperature of a freezing compartment satisfies a second temperature condition; based on the second temperature satisfying the second temperature condition, determining (i) whether a third temperature of an ice making compartment satisfies a third temperature condition and (ii) whether a driving time for ice making has passed; maintaining operation of a compressor while determining (i) whether the second temperature satisfies the second temperature condition, (ii) whether the third temperature satisfies the third temperature condition, and (iii) whether the driving time has passed; and stopping operation of the compressor based on at least one of (i) a determination that the third temperature satisfies the third temperature condition or (ii) a determinatio

Abstract: Disclosed is an air deflector moving mechanism. The air deflector moving mechanism includes an air deflector (1) and a driving mechanism. The air deflector (1) is in a drive connection with the driving mechanism and moves under a driving action by the driving mechanism. The driving mechanism includes a rotary column (2). A driving groove (3) extending in an axial direction is provided circumferentially on an outer periphery of the rotary column (2). The air deflector (1) is provided with a driving head (4) disposed in the driving groove (3). Also disclosed is an air conditioner including the air deflector moving mechanism.

Abstract: A refrigeration cycle apparatus according to the present invention, a controller is configured to cause a first operation mode and a second operation mode to be executed as operation modes of an air-sending fan. The first operation mode is an operation mode in which an operation of the air-sending fan is started based on a first manipulation performed on an operation unit and the air-sending fan is stopped based on a second manipulation performed on the operation unit. The second operation mode is an operation mode in which the operation of the air-sending fan is started when refrigerant is detected by a refrigerant detection unit, the air-sending fan is not stopped based on the second manipulation, the air-sending fan is stopped based on a third manipulation different from the second manipulation, and the operation of the air-sending fan is restarted based on a fourth manipulation different from the first manipulation.

Abstract: Provided is a ceiling-concealed air-conditioning apparatus, including: an air-conditioning apparatus main body having an air inlet formed in a lower portion thereof; an electrical component box arranged on a side of the air-conditioning apparatus main body, and includes a switch configured to operate the air-conditioning apparatus main body, and arranged on a lower portion of the electrical component box; and a decorative panel arranged below the air-conditioning apparatus main body and the electrical component box to serve as a decorative surface, the decorative panel including: a suction grille arranged so as to be openable and closable and configured to cover the air inlet; and a side panel arranged below the electrical component box, the side panel including an openable and closable cover arranged so as to be openable and closable and configured to cover the switch when the openable and closable cover is closed, the openable and closable cover including a protruding portion protruded on a side portion of

Abstract: An air-quality network system for homes, the air-quality network system having an air inlet unit, an air outlet unit, and a monitoring unit. The monitoring unit monitors, measures, and transmits information regarding the air quality to a network. The data management algorithm in the network compares the air quality information against preset/user-defined values and accordingly, determines the operating parameters of the air inlet and/or air outlet units. The system provides real-time monitoring and visualization of the air quality in the home, and provides emergency alerts if air quality exceeds safety limits.

Abstract: A whole house fresh air system with a wireless interface is disclosed. An example embodiment includes: a damper installed in a structure; a collector box coupled to an intake side of the damper; a disburser box coupled to an output side of the damper; a plurality of intake vents mounted to the structure, the plurality of intake vents having access to fresh air outside of the structure, the plurality of intake vents being coupled to the collector box via a plurality of intake ducts routed through an interior of the structure; and a plurality of output vents installed within the structure, the plurality of output vents having access to air inside of the structure, the plurality of output vents being coupled to the disburser box via a plurality of output ducts routed through an interior of the structure.

Abstract: Generally, a variable fan speed control in an HVAC system is described. Such methods and systems to control fan speed can in turn improve efficiency of the HVAC system by minimizing power consumption, for example of the compressor. The control scheme is based on various operating conditions of compressor load and ambient air temperature, which are used to determine an optimum fan speed.

Abstract: A refrigerator that may include a cabinet to define a storage space, a door to open and close the storage space, a dispenser provided in the door to dispense hot water, a hot water tank through which water flows so as to heat water introduced into the door, a heater provided in the door to heat the hot water tank, a water inflow passage through which water is supplied to the hot water tank, a water discharge passage guiding hot water discharged from the hot water tank to the dispenser, a flow rate sensor provided in the water inflow passage to measure a flow rate of water flowing through the water inflow passage, a water inflow valve provided in the water inflow passage to adjust a flow of water in the water inflow passage, a water discharge valve provided in the water outlet passage, an input provided in the door to input a temperature of the hot water to be dispensed and a hot water dispensing command, and a controller to control the water inflow valve and the water discharge valve.

Abstract: A heat pump apparatus includes a refrigerant circuit for circulating combustible refrigerant, and a load unit to be provided in a room and configured to accommodate a load side heat exchanger. The load side heat exchanger allows heat exchange between the combustible refrigerant and a liquid heat medium. The load unit includes a fan, an air inlet for sucking in air from the room, and an air outlet for blowing out the air, sucked in from the air inlet, to the room. The air outlet is provided at a position of a height different from the height of the air inlet.

Abstract: The dual-cycle and dual-outlet air conditioner includes two separate condensation-evaporation cycles that operate independently with respect to one another, but are contained within the same housing. Each cycle includes its own evaporator and condenser, but with a common return air intake/evaporator blower and a common condenser/exhaust fan. Two separate streams of cooled air are produced by the two separate evaporators, which may then be transferred through two separate ducts to supply cooled air to different zones within a building. The two separate condensation-evaporation cycles may be independently controlled by separate thermostats in the different zones of the building.

Abstract: An electric starter system is usable with a powertrain having an engine with a flywheel. The starter system includes a brushless starter motor having a machine temperature, and a solenoid operable for translating a pinion gear into meshed engagement with the flywheel and the starter motor in response to a requested engine start event. A controller has temperature regulation logic that includes a proportional-integral torque control loop. Execution of a method embodied by the logic, in response to the requested engine start event when the machine temperature exceeds a first temperature, causes the controller to determine a required starting torque of the starter motor using the control loop. The controller causes the starter motor to transmit the required starting torque to the engine at a level that reduces the machine temperature below the first temperature.

Abstract: An arrangement to reduce refreezing of meltable snow includes a wiper arm configured to wipe the meltable snow from an ambient-facing surface of a window positioned on a vehicle. The arrangement also includes a sensor coupled to the wiper arm that is configured to gather and transmit a parameter on the vehicle and environment. The arrangement also includes a processor that is configured to receiving the parameter, determining refreezability of the meltable snow based on the parameter, and defining an action to be performed by the wiper arm.

Abstract: An air-conditioning apparatus includes; a first heat source device configured to transfer heat to process air using as a heat source a vapor-compression refrigeration cycle; a second heat source device configured to transfer heat to the process air using an other heat source different from the vapor-compression refrigeration cycle; and a controller configured to control the first heat source device and the second heat source device. The controller deactivates the first heat source device and activates the second heat source device when, during a period in which the first heat source device is being operated to heat the process air, a temperature of the heated process air is kept at a target temperature and a parameter indicating an energy consumption of the first heat source device exceeds a first threshold value.

Abstract: A steam cycle system includes a heat recovery steam generator (HRSG) which receives exhaust gases, a steam turbine coupled to the HRSG which receives a first steam flow generated by the HRSG, and a condenser which condenses a second steam flow output by the steam turbine. The condenser includes a plurality of heat exchanger tubes, a fan, and a steam collection header. The system includes one or more sensors which measure one or more properties of the steam flow. The system includes a closed-loop controller communicatively coupled to the one or more sensors. The controller receives data from the one or more sensors, determines a flow rate of the second steam flow through the steam header using the one or more sensors, calculates whether the flow rate of the steam is within a threshold, and adjusts one or more operating parameters of the fan.

Abstract: A hybrid electric vehicle (HEV) that includes an internal combustion engine and a climate control system (CCS) coupled to controllers configured to auto start-stop the engine when the HEV decelerates to an engine-stop threshold speed. The controllers are also configured to adjust a climate-fan-speed by a predetermined initial-factor, and at subsequent timed-intervals with a speed-factor that is adjusted from the initial-factor at each timed-interval, such that engine restart is inhibited by perceptually small speed adjustments and perceptually slow timed-interval cabin cooling adjustments. Such gradual adjustments are tuned to increase passenger perceptions of continuing cabin comfort, which reduce the likelihood that a passenger may adjust the CCS to require engine restart, and to increase auto stop-start fuel economy.

Abstract: An aircraft air conditioning system includes an ambient air line connected to an air conditioning system mixer to supply ambient air, and a cabin exhaust air line connectable to an aircraft cabin for being flown through with cabin exhaust air. An ambient air compressor in the ambient air line compresses ambient air in the ambient air line. A refrigerating apparatus includes a refrigerant circuit and a refrigerant compressor in the circuit. The refrigerant circuit is thermally coupled to the ambient air line to transfer heat from ambient air line air to refrigerant circulating in the circuit before the ambient air is supplied to the mixer. A turbine is coupled to the air compressor. A control device controls the air conditioning system wherein in a first operating state the turbine receives air from the ambient air line, and in a second operating state receives cabin exhaust air.

Abstract: A cooling system for an equipment closet in a building has a direct expansion cooling circuit. The cooling system has two basic modes of operation. A first mode where the direct expansion cooling circuit is off and transfer air from an area of the building outside the equipment closet is used to cool the interior of the equipment closet without any cooling provided by the direct expansion cooling circuit and a second mode where the direct expansion cooling circuit is on and provides direct expansion cooling that is used to cool the interior of the equipment closet.