Entries |
Document | Title | Date |
20080196430 | VARIABLE RESTRICTOR - A variable restrictor including a tube with first and second ends of a first cross-sectional area and a region between the ends of reduced cross-sectional area. The region comprises a flattened portion of the tube where the tube has been permanently deformed such that opposed wall portions of the tube are much closed together than in the remainder of the tube. An actuator is arranged to selectively alter the separation of the opposed wall portions of the flattened section. | 08-21-2008 |
20080209929 | Air-Conditioning System For a Motor Vehicle - An air-conditioning system for a motor vehicle includes a coolant circuit, through which it is possible to pump coolant with the aid of a compressor, the air-conditioning system having a torque-determining unit for determining a drive torque required for operating the compressor as a function of a temperature of air, which has flowed past an evaporator integrated into the coolant circuit for evaporating coolant, a pressure of the coolant prevailing in the coolant circuit in front of the compressor relative to a flow direction of the coolant or an actuating signal for setting a settable compressor stroke of the compressor. | 09-04-2008 |
20080209930 | Heat Pump with Pulse Width Modulation Control - A heat pump is provided with a component that has a pulse width modulation control to adjust system capacity. Thus, by utilizing a pulse width modulation technique to control this component, the present invention is able to closely tailor the delivered capacity of the heat pump to that which is demanded, without cycling the unit. In one embodiment, the component has a suction pulse width modulation valve. In another embodiment, the component which is modulated is the compressor pump unit, and, in particular, a pair of scroll members that are allowed to move into and out of contact with each other. The pulse width modulation control device can also be utilized in combination with a heat pump having an economizer function and/or an un-loader function. | 09-04-2008 |
20080245085 | COOLING APPARATUS WITH EVAPORATOR - A cooling apparatus for objects such as convenience foods and beverages has an enclosure and a vapour cycle refrigeration system. The refrigeration system includes a compressor, a condenser, a metering device and an evaporator, all connected in a circuit. Fans force air across the evaporator coils during operation of the compressor. When the compressor is ‘off’, or dormant, the evaporator fans are operated in a partial or reduced duty cycle in which the overall power draw and average power consumption is less than it would be if the evaporator fans were run continuously. | 10-09-2008 |
20080245086 | Multi-zone low temperature freezer - A freezer provides multiple zones of temperature for preserving a frozen product at an ultra-low temperature. At least one first housing provides a first interior space at a first predetermined temperature. A first compressor, condenser and metering device supply a first refrigerant to a first evaporator for lowering the temperature in the first interior space to the first predetermined temperature. At least one second housing is mounted totally within the first interior space and provides a second interior space for defining a second freezing zone at a second predetermined temperature. The second predetermined temperature is lower relative to the first predetermined temperature. A second compressor, condenser and metering device supply a second refrigerant to a second evaporator for freezing the second housing to the second predetermined temperature. The second compressor, condenser and metering device are disposed within the first interior space to the first evaporator. | 10-09-2008 |
20080250802 | Air-conditioning system - An air-conditioning system includes a refrigeration cycle and a control unit. The refrigeration cycle includes an electric compressor in which a compression mechanism for drawing a refrigerant therein for compression is integrated with an electric motor for driving the compression mechanism, and a motor drive circuit for driving the motor is cooled using an intake refrigerant drawn into the compression mechanism. The control unit provides operational control to the motor drive circuit and the refrigeration cycle. When the temperature of the motor drive circuit has exceeded a predetermined temperature, the control unit varies a condition of supplying air to exchange heat with the refrigerant flowing through the refrigeration cycle to thereby reduce the temperature of the intake refrigerant. | 10-16-2008 |
20080289348 | Refrigeration cycle system - A refrigeration cycle system is disclosed. A compression unit | 11-27-2008 |
20090025410 | Refrigeration System - When during a first action of a refrigeration system the internal cold storage temperature is held at a desired temperature by an evaporator, the refrigeration system performs a second action of increasing the cooling capacity of the evaporator to decrease the internal cold storage temperature. When during the second action the internal cold storage temperature reaches a minimum temperature Tmin, the refrigeration system stops a compressor and performs a third action. When during the third action the internal cold storage temperature reaches a maximum temperature Tmin, the refrigeration system drives the compressor and performs the first action. | 01-29-2009 |
20090113907 | Refrigeration Apparatus - A refrigeration apparatus having a refrigerant circuit ( | 05-07-2009 |
20090113908 | Method for controlling motor of air conditioner and motor controller of the same - A motor controlling method and apparatus of an air conditioner are disclosed. It is checked whether or not an operation frequency of a compressor motor is the same as or greater than a certain frequency and it is also checked whether or not a detected velocity of a fan motor is the same as or lower than a certain velocity during a certain time period. If the operation frequency is the same as or greater than the certain frequency and the detected velocity is the same as or lower than the certain velocity during a certain time period, the compressor motor is temporarily stopped. Because the compressor motor operates according to operational conditions of the fan motor, an overload can be prevented. | 05-07-2009 |
20090120112 | AIR CONDITIONER - An air conditioner according to an embodiment of the invention includes a refrigerator cycle unit having a variable speed compressor, an outdoor heat exchanger, a decompression device, an indoor heat exchanger, and an accumulator sequentially connected to one another, a bypass pipe that connects the discharge side of the compressor and an outlet of the accumulator and has a two-way valve in the middle thereof, a discharge temperature sensor that detects the temperature of the compressor, and a controller that opens or closes the two-way valve, and limits the number of rotations of the compressor to a predetermined value or less, on the basis of the temperature detected by the discharge temperature sensor when the compressor starts. | 05-14-2009 |
20090133418 | Plug-in circuit and cooling system thereof - The present invention relates to a plug-in circuit and a cooling system thereof. The cooling system includes the plug-in circuit, an external terminal and an alternating current (AC) compressor, wherein the plug-in circuit includes an AC to AC inverter and an inverter control circuit. The AC to AC inverter is coupled to and between the external terminal and the AC compressor for converting an external AC voltage received by the external terminal to an internal AC voltage to supply to the AC compressor. The inverter control circuit is coupled to the AC to AC inverter for outputting a control signal to the AC to AC inverter to control the frequency of the internal AC voltage according to an external parameter. | 05-28-2009 |
20090293521 | HVAC System Control for Improved Vehicle Fuel Economy - A method of operating a HVAC system in a vehicle having an engine that operates in a high efficiency mode and a less efficient mode is disclosed. The method may comprise the steps of: operating a refrigerant compressor to cool a passenger compartment and charge a cold thermal storage apparatus; determining if a cold charge in the storage apparatus has exceeded a threshold; enabling compressor cycling if the cold charge in the storage apparatus has exceeded the threshold; detecting if the engine is operating in the high efficiency mode; determining an amount of HVAC loads on the engine; determining a proximity of the engine operation to a switching point from the high efficiency mode to the less efficient mode; and conducting a HVAC load shed if the HVAC load reduction allows the engine to stay below the switching point and the compressor cycling is enabled. | 12-03-2009 |
20100000246 | METHOD AND DEVICE FOR COOLING BEVERAGES - The invention relates to a beverage dispenser ( | 01-07-2010 |
20100005820 | Cooling Device for Printing Machines - A cooling device for printing machines, includes a refrigerating circuit ( | 01-14-2010 |
20100024456 | TURBO CHILLER AND CONTROL METHOD THEREFOR - A turbo chiller equipped with a high-efficiency two-stage turbo compressor is provided. In a turbo chiller including a control unit for controlling the degrees of opening of first inlet guide vanes of a first impeller and second inlet guide vanes of a second impeller, the control unit has a slave mode in which the second inlet guide vanes are operated so as to be dependent on the first inlet guide vanes in a slave-mode priority region, and an independent mode in which the degree of opening of the second inlet guide vanes is increased independently of the first inlet guide vanes in an independent-mode priority region. | 02-04-2010 |
20100031682 | SOLAR AIR CONDITIONER FOR VEHICLE - A motor vehicle having a solar air conditioning system which is entirely independent of the vehicle propulsion system. The vehicle comprises a body, at least two axles, a propulsive power plant, and a first electrical system serving the power plant, lighting, and other support functions of the motor vehicle. The air conditioning system has a refrigerant compressor including an electric motor, and a second electrical system comprising a battery, a photovoltaic element which charges the battery of the air conditioning system, and an on-off switch controlling the motor of the refrigerant compressor. The first electrical system is electrically unconnected to the second electrical system of the motor vehicle. The battery of the solar air conditioning system may be located proximate one axle and the refrigerant compressor may be located proximate the other axle. | 02-11-2010 |
20100037642 | COMPRESSOR CAPACITY CONTROL OPERATION MECHANISM AND AIR CONDITIONER PROVIDED WITH SAME - A compressor capacity control operation mechanism includes a pilot valve (flow channel switching valve) having capillary tubes, a suction branching pipe, an intermediate pipe, and a discharge branching pipe. The suction branching pipe is connected to a first capillary tube and branches off from a compressor suction pipe. The intermediate pipe is connected to a second capillary tube and a compressor cylinder intermediate part. The discharge branching pipe is connected to a third capillary tube and branches off from a compressor discharge pipe. Preferably, the suction, intermediate and discharge branching pipes have larger diameters than the first second and third capillary tubes. Also, the pilot valve preferably has a flow channel configuration switchable between first and second states in which the first, second and third capillary tubes are connected differently in the first and second states. | 02-18-2010 |
20100043469 | REFRIGERATION SYSTEMS WITH VOLTAGE MODULATED COMPRESSOR MOTORS AND METHODS OF THEIR CONTROL - A refrigerant system is provided that includes a compressor, a motor for driving the compressor, a refrigerant system component, and a controller. The refrigerant system component can operate in a pulse width modulated mode having a loaded phase and an unloaded phase. The compressor motor is loaded in the loaded phase but unloaded in the unloaded phase. The controller applies a first voltage to the compressor motor in the loaded phase and a second voltage to the compressor motor in the unloaded phase. Here, the second voltage is less than the first voltage. | 02-25-2010 |
20100275628 | CAPACITY CONTROL SYSTEMS AND METHODS FOR A COMPRESSOR - A system and method are provided to control the output capacity of a compressor in response to the outdoor ambient temperature. The outdoor ambient temperature is measured by a sensor. The measured outdoor ambient temperature is then used to control the output capacity of the compressor. The compressor is operated at less than 100% capacity in response to the outdoor ambient temperature being less than or equal to 95° F. If the outdoor ambient temperature reaches a predetermined temperature greater than 95° F., the compressor is then operated at 100% capacity. | 11-04-2010 |
20100313586 | REFRIGERATION CYCLE APPARATUS - A refrigeration cycle apparatus ( | 12-16-2010 |
20100319375 | AIR CONDITIONING APPARATUS - An air conditioning apparatus is provided. The apparatus includes: an engine; an outdoor unit including a compressor driven by the engine to inhale a refrigerant, and compress and discharge the inhaled refrigerant and an outdoor heat exchanger; an indoor unit including an indoor heat exchanger; a controlling unit which controls a rotational speed of the compressor to be lower than a predetermined upper limit rotational speed; an outdoor temperature detecting unit which detects an outdoor temperature; an in-box temperature detecting unit which detects an in-box temperature within an enclosure box which accommodates therein the engine and the compressor; a correcting unit which corrects an upper limit rotational speed of the compressor when the outdoor temperature exceeds a predetermined outdoor temperature; a canceling unit which cancels the correction of the upper limit rotational speed when the in-box temperature is lower than a predetermined in-box temperature. | 12-23-2010 |
20100326109 | REFRIGERATING APPARATUS - A refrigerating apparatus for keeping an inside of a storage at a predetermined low-temperature state includes first and second refrigerant circuits including compressors, condensers, decompressors, and evaporators, connected circularly with pipings to form refrigerating cycles, the circuit having a first or second refrigerant sealed therein as a working refrigerant, a first sensor which detects a temperature of a cascade condenser constituted by integrating the evaporator of the first refrigerant circuit and the condenser of the second refrigerant circuit in a heat exchangeable manner, first and second controllers which control operation performances of the first and second compressors in a variable manner based on first and second sensor detected temperatures in order that the first and second sensor detected temperatures are first and second temperatures, respectively, and a second sensor which detects a temperature inside the storage. | 12-30-2010 |
20110041533 | SCREW COMPRESSOR DRIVE CONTROL - An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented. | 02-24-2011 |
20110048046 | CONTROL SYSTEM - A system for controlling a centrifugal gas compressor ( | 03-03-2011 |
20110100042 | REFRIGERATING CYCLE DEVICE AND AIR CONDITIONER - A compressor for compressing a refrigerant containing a substance having a double bond, a condenser for condensing the refrigerant by heat exchange, expanding means for decompressing the condensed refrigerant, and an evaporator for evaporating the decompressed refrigerant by heat exchange are connected by piping so as to configure a refrigerant circuit through which the refrigerant is circulated, and control means is provided for controlling an operation of the refrigerant circuit so that a pressure of the refrigerant in the refrigerant circuit becomes less than a critical pressure of the substance having the double bond. | 05-05-2011 |
20110120162 | PERFORMANCE EVALUATION DEVICE FOR VARIABLE-SPEED CENTRIFUGAL CHILLER - An object is to sequentially calculate planned COPs. Provided is a performance evaluation device for a variable-speed centrifugal chiller that includes a data acquisition unit that acquires operating data of the variable-speed centrifugal chiller as input data; a storage unit that stores a first arithmetic equation derived on the basis of mechanical characteristics of the chiller and used for calculating a relative load factor that relatively expresses a relationship between a current load factor at a current coolant inlet temperature and a predetermined load factor at a predetermined coolant inlet temperature set as a reference operating point, a second arithmetic equation that expresses a relationship between the relative load factor and a correction coefficient, and a third arithmetic equation used for calculating a planned COP by using the correction coefficient to correct a COP calculation equation derived from a reverse Carnot cycle; and an arithmetic unit that calculates the planned COP under current operating conditions by using the operating data acquired by the data acquisition unit in the first, second, and third arithmetic equations stored in the storage unit. | 05-26-2011 |
20110120163 | Semi-Frozen Product Dispenser - A semi-frozen product dispenser ( | 05-26-2011 |
20110132014 | VEHICLE AIR CONDITIONING SYSTEM - A vehicle air conditioning system includes a controller that initially controls operation of a compressor to switch between inactive and active states in response to detecting that an operating condition is equal to or surpasses a first operation threshold. The controller determines a first time delay occurring between initiating the switch from one of the inactive and active states to the other of the compressor, and an actual change in the operating condition. The controller subsequently defines a first limit that is offset from the first operation threshold such that the controller controls the operation of the compressor to subsequently switch from the one of inactive and active states to the other in response to detecting that the operating condition is equal to or surpasses the first limit. | 06-09-2011 |
20110132015 | DEDICATED PULSING VALVE FOR COMPRESSOR CYLINDER - A reciprocating piston compressor for use in a refrigerant compression circuit comprises first and second intake manifolds, first and second reciprocating piston compression units, an outlet manifold and a first pulsing valve. The intake manifolds segregate inlet flow into the compressor. The first and second reciprocating piston compression units receive flow from the first and second intake manifolds, respectively. The outlet manifold collects and distributes compressed refrigerant from the compression units. The first pulsing valve is mounted externally of the first intake manifold to regulate refrigerant flow into the first intake manifold. In another embodiment, a second valve is mounted externally of the second intake manifold to regulate flow into the second intake manifold, and the first and second valves are operated by a controller. The controller activates the first valve with variable width pulses having intervals less than an operating inertia of the refrigerant compression circuit. | 06-09-2011 |
20110167852 | AIR-CONDITIONING REFRIGERATING SYSTEM - An air-conditioning refrigerating system that enables demand control based on operation control of an air-conditioning system and a refrigerating system is provided. | 07-14-2011 |
20110174005 | REFRIGERATING APPARATUS - A refrigerating apparatus having a plurality of compressors includes an injection circuit ( | 07-21-2011 |
20110252819 | Continuously variable transmission apparatus and air conditioning system having the same - An output-side swing arm is adapted to be swung about a swing axis thereof when the output-side swing arm is urged by a corresponding part of an input-side swing arm, which is driven by a force transmitted from an input shaft. An adjusting mechanism adjusts an amount of swing of the output-side swing arm by changing a location of a point of action of the input-side swing arm relative to the output-side swing arm in a radial direction of the swing axis of the input-side swing arm. | 10-20-2011 |
20120060533 | PRESSURE REDUCTION SYSTEM AND VACUUM TREATMENT DEVICE - A depressurization system includes a plurality of depressurization devices, each of which includes a cooling; and a compression device. The compression device includes a compression unit, which is provided with an AC electric motor, and supplies a compressed coolant to each cooling unit at a flow rate corresponding to a rotation speed of the AC electric motor. Each cooling unit supplements gas when adiabatically expanding the compressed coolant. The depressurization system also includes a temperature detection unit, which detects the temperature of each cooling unit, an inverter device, which is capable of changing a frequency of AC power supplies to the AC electric motor, and a frequency controller, which controls an output frequency of the inverter device. The frequency controller relatively raises the output frequency of the inverter device when the temperature of the cooling unit of at least one depressurization device of the depressurization devices is greater than or equal to a first threshold value, and relatively lowers the output frequency of the inverter device when the temperature of the cooling unit of all of the depressurization devices decreases to less than the first threshold value. | 03-15-2012 |
20120125028 | SPACE-SAVING HIGH-DENSITY MODULAR DATA POD SYSTEMS AND ENERGY-EFFICIENT COOLING SYSTEMS - A space-saving, high-density modular data pod system and an energy-efficient cooling system for cooling electronic equipment and method of cooling are disclosed. The cooling system includes a free-cooling system cooling a first fluid in thermal communication with the electronic equipment using atmospheric air and a mechanical sub-cooling system coupled to the free-cooling system. The mechanical system cools a second fluid flowing in the free-cooling system as a function of an amount by which the free-cooling system has exceeded its maximum cooling capacity. The method of cooling includes using a first fluid, enabling heat transfer from the first fluid to a second fluid that has been cooled using atmospheric air, and mechanically cooling the second fluid to the extent that free cooling the first fluid is insufficient to cool the first fluid. The cooling system operates by the wet bulb temperature exceeding a first predetermined wet bulb temperature. | 05-24-2012 |
20120137713 | POWER SAVINGS APPARATUS FOR TRANSPORT REFRIGERATION SYSTEM, TRANSPORT REFRIGERATION UNIT, AND METHODS FOR SAME - Embodiments of systems, apparatus, and/or methods can control conditions such as temperature within a container of a transport refrigeration system. Embodiments can include a controller for controlling the transport refrigeration system to reduce power consumption. Embodiments of systems, apparatus, and/or methods for operating the same can control cycling of a transport refrigeration unit to conserve power where a subsequent cycle time in a power savings mode is based on at least one previous cycle time. In addition, components can be enabled based on monitored conditions to reduce power consumption. | 06-07-2012 |
20120151950 | HEAT TRANSFER SYSTEM - A heat transfer system includes a heat exchanger configured to transfer heat between a first fluid and a second fluid. The heat exchanger includes an outer sleeve and a microchannel unit. The outer sleeve has an interior surface defining a cavity and an exterior surface configured to be in direct thermal communication with the first fluid. The microchannel unit is received in the cavity. The microchannel unit has a plurality of microchannels configured to receive the second fluid therein and be in direct thermal communication with the second fluid. The microchannel unit has an exterior surface in direct thermal communication with the interior surface of the outer sleeve to transfer heat therebetween. At least one of the interior surface of the outer sleeve and the exterior surface of the microchannel unit has grooves defining breach channels for the first fluid or the second fluid should a breach in the outer sleeve or the microchannel unit occur. | 06-21-2012 |
20120204587 | TEMPERATURE CONTROL SYSTEM - Provided is a temperature control system, including a closed refrigerant circuit having an evaporator unit configured for absorbing heat via the refrigerant, thereby evaporating it, a compressor unit configured for increasing the pressure and temperature of refrigerant within the circuit, and a condenser unit configured for rejecting heat from the refrigerant, thereby liquefying it. The compressor unit includes a mechanical compressor configured for increasing the pressure of the refrigerant and a thermal collector configured for utilizing an external heat source to increase the temperature of the refrigerant. | 08-16-2012 |
20120227430 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus includes an outdoor air temperature sensor detecting an outdoor temperature; a compressor temperature sensor detecting a temperature of an outer wall of a compressor; a liquid-level and concentration detection sensor detecting a liquid surface level in the compressor and a concentration of a lubricant oil in a liquid in the compressor; an electric heater heating the compressor; and a controller that carries out preheating to the compressor by driving the electric heater when a detection value of the outdoor air temperature sensor is higher than or equal to a detection value of the compressor temperature sensor and, further, when the liquid surface level detected by the liquid-level and concentration detection sensor is higher than or equal to a predetermined level and the concentration of the lubricant oil in the liquid is lower than a preset minimum required concentration. | 09-13-2012 |
20120260688 | HEAT PUMP SYSTEM - A heat source unit has a capacity-variable heat source-side compressor and a heat source-side heat exchanger which functions as a radiator of refrigerant. Usage units are connected to the heat source unit and have usage-side heat exchangers, respectively, which function as evaporators of refrigerant and cool an aqueous medium. An operating capacity controller controls the capacity of the heat source-side compressor so that evaporation temperature of refrigerant of each of the usage-side heat exchangers reaches a first target evaporation temperature. A decision unit calculates second target evaporation temperatures at which outlet temperatures of the aqueous medium in the usage-side heat exchangers of the respective operating usage units reach predetermined set temperatures, and decides a minimum value of the second target evaporation temperatures as the first target evaporation temperature. | 10-18-2012 |
20120291470 | Air Conditioning System With Discharged Heat Driving Compression of System Refrigerant - An air conditioning system. The system includes apparatus for circulating a refrigerant in a path, further having apparatus for compressing the refrigerant and generating heat in the refrigerant. The system further includes apparatus for providing a driving force to the apparatus for compressing in response to the generated heat. | 11-22-2012 |
20120318014 | CAPACITY AND PRESSURE CONTROL IN A TRANSPORT REFRIGERATION SYSTEM - Embodiments of apparatus, transport refrigeration units, and methods for operating the same can control cooling capacity for a refrigerant vapor compression system. Embodiments can provide use discharge pressure control for modulating cooling capacity for a refrigerant vapor compression system. In one embodiment, discharge pressure control can reduce the cooling capacity without increasing the compressor pressure ratio or discharge temperature. In one embodiment, discharge pressure control can reduce the cooling capacity independently of system superheat. In one embodiment, discharge pressure control can control a compressor discharge temperature; for example, to remain below a threshold temperature. | 12-20-2012 |
20130000341 | HEAT EXCHANGER FOR A REFRIGERATED AIR DRYER - A refrigerated air dryer includes a three-path heat exchanger | 01-03-2013 |
20130042641 | REFRIGERATOR AND CONTROL METHOD THEREOF - A refrigerator capable of having a storage compartment configured for a converted use as a freezing compartment or a refrigerating compartment includes a refrigerating compartment; a converting compartment configured for a variable use among freezing, refrigerating, and off; a cold air flow supplying apparatus having a compressor, a condenser, an evaporator, an expanding valve, a draft fan, a cold air flow supplying apparatus; a converting damper apparatus installed at the converting compartment discharging flow path for controlling the supply of the cold air flow to the converting compartment; and a refrigerating compartment damper apparatus installed at the refrigerating compartment discharging flow path for controlling the supply of the cold air flow to the refrigerating compartment. | 02-21-2013 |
20130047651 | Temperature Control System in a Parked Vehicle - An air-conditioning system for vehicle temperature control incorporates a thermostat having contacts, and a circulation contour, including a condenser, an expansion valve essentially connected with the condenser, an evaporator connected sequentially with the expansion valve, a first tee splitter connected to a common line, a second tee splitter connected to the condenser, a main compressor connected with the first tee splitter and with the second tee splitter, a supplemental compressor connected with the first tee splitter and the second tee splitter. The supplemental compressor is operatively controlled by the thermostat and powered by a supplemental battery. In embodiments, the supplemental compressor is electrically connected with the supplemental battery and operatively controlled by a control circuitry including a power relay, an air-condition relay, and the contacts of thermostat. The proposed system reduces pollutions and saves energy. | 02-28-2013 |
20130047652 | REFRIGERATOR AND CONTROL METHOD THEREOF - A refrigerator is disclosed herein. The refrigerator may include a compressor to compress a refrigerant, a condenser to condense the refrigerant passed through the compressor, a capillary tube that lowers a temperature and pressure of the refrigerant passed through the condenser, an evaporator to evaporate the refrigerant passed through the capillary tube, a thermal storage device for auxiliary cooling that undergoes heat exchange with the refrigerant to store thermal energy, an energy management device that receives electric rate information, and a controller configured to control the compressor based on the electric rate information received at the energy management device. The controller may control an operation of the thermal storage device to provide auxiliary cooling for the refrigerator when the compressor is not operational or when electric rates are relatively high. | 02-28-2013 |
20130047653 | SPACE-SAVING HIGH-DENSITY MODULAR DATA POD SYSTEMS AND ENERGY-EFFICIENT COOLING SYSTEMS - A space-saving, high-density modular data pod system and an energy-efficient cooling system are disclosed. The modular data pod system includes a central free-cooling system and a plurality of modular data pods, each of which includes a heat exchange assembly coupled to the central free-cooling system, and a distributed mechanical cooling system coupled to the heat exchange assembly. The modular data pods include a data enclosure having at least five walls arranged in the shape of a polygon, a plurality of computer racks arranged in a circular or U-shaped pattern, and a cover to create hot and cold aisles, and an air circulator configured to continuously circulate air between the hot and cold aisles. Each modular data pod also includes an auxiliary enclosure containing a common fluid and electrical circuit section that is configured to connect to adjacent common fluid and electrical circuit sections to form a common fluid and electrical circuit that connects to the central free-cooling system. The auxiliary enclosure contains at least a portion of the distributed mechanical cooling system, which is configured to trim the cooling performed by the central free-cooling system. | 02-28-2013 |
20130074537 | METHOD FOR OPERATING A VEHICLE CLIMATE CONTROL SYSTEM - A method for controlling torque of an air conditioner compressor is disclosed. In one example, the air conditioner compressor is a variable displacement compressor. The method may provide smooth transitions between different air conditioner compressor torques. | 03-28-2013 |
20130098088 | MULTI-STAGE COOLING SYSTEM WITH TANDEM COMPRESSORS AND OPTIMIZED CONTROL OF SENSIBLE COOLING AND DEHUMIDIFICATION - A cooling system has a plurality of separate cooling stages including an upstream cooling stage having an upstream cooling circuit and a downstream cooling stage including a downstream cooling circuit, which are each a direct expansion cooling circuit including a tandem compressor. Each tandem compressor includes a fixed capacity compressor and a variable capacity compressor. A controller controls the fixed capacity compressor and variable capacity compressor of each tandem compressor based on a Call for Cooling, which of a plurality of ranges the Call for Cooling falls within, and whether the Call for Cooling is ramping up or ramping down. | 04-25-2013 |
20130098089 | DEVICE AND METHOD FOR CONTROLLING COMPRESSOR, AND REFRIGERATOR INCLUDING SAME - Disclosed are a compressor control device, a method for controlling a compressor, and a refrigerator including the same. The present invention enables: a compressor to be driven by using a mode selectively to be driven by an inverter and a mode which directly uses a supply voltage, according to the quality of electricity of the supply voltage; loss which is caused by the use of the inverter to be reduced or removed by directly providing the supply voltage to the compressor within a certain voltage or frequency range; and increased energy efficiency by reducing power consumption. | 04-25-2013 |
20130104583 | AIR CONDITIONER | 05-02-2013 |
20130104584 | TWO-STAGE PRESSURISING REFRIGERATION CYCLE DEVICE | 05-02-2013 |
20130139535 | Control for Compressor Unloading System - A variable-capacity compressor that includes a housing having an inlet for receipt of refrigerant and an outlet for return of refrigerant, and a plurality of compressing elements contained in the housing between the inlet and the outlet. The variable capacity compressor includes a valve having an electrical control. The valve is dedicated to fewer than all of the compressing elements. The valve is movable between a first state which communicates refrigerant flow to the compressing elements, and a second state that reduces or stops flow to the compressing elements. In an embodiment of the invention, an unloading controller has an operational modulation mode that includes cycling the valve between on and off states to provide a portion of compressor capacity. The unloading controller is further programmed to provide a minimum delay time between transitions between the first and second states, but no maximum dwell time between transitions. | 06-06-2013 |
20130139536 | APPARATUS AND METHOD FOR CONTROLLING A COMPRESSOR, AND REFRIGERATOR COMPRISING SAME - The present invention relates to an apparatus for controlling a compressor, to a method for controlling a compressor and to a refrigerator comprising same. According to certain embodiments of the present invention, a compressor operates selectively in a TRIAC driving mode or in a mode in which commercial power is directly used in accordance with the quality of the electricity of the commercial power. According to certain embodiments of the present invention, the commercial power is directly applied to the compressor within the range of a predetermined voltage or frequency so as to reduce or remove losses caused by the TRIAC driving, and power consumption is reduced to improve energy efficiency. | 06-06-2013 |
20130312443 | REFRIGERATION CYCLE APPARATUS AND REFRIGERATION CYCLE CONTROL METHOD - A combined air-conditioning and hot water supply system includes a refrigeration cycle mechanism, a hot water storage tank, and a controller. The refrigeration cycle mechanism has a compressor whose operating frequency can be controlled, a plate water-heat exchanger that heats water, a hot water supply pressure-reducing mechanism, and an outdoor heat exchanger. The controller includes a clock section, a computing section, a memory section, and a controlling section. The clock section measures time. The computing section calculates the actual hot water supply load. The memory section stores information related to the hot water supply load calculated by the computing section. The controlling section controls the operating frequency of the compressor based on the quantity of heat storage, the hot water supply load, and a preset hot water supply time. | 11-28-2013 |
20140013784 | BLDC MOTOR DRIVING APPARATUS AND REFRIGERATOR USING THE SAME - A motor driving apparatus and a refrigerator using the same is provided. The refrigerator may include a compressor, a motor, a driving unit, temperature sensing units sensing the temperatures of storage chambers and an external temperature, and a control unit selecting a driving mode of the driving unit based on the sensing result of the temperature sensing units and controlling the driving unit to drive the motor according to the selected driving mode. In a general operation mode, the control unit controls the driving unit to drive the motor in a 120 degree conduction method, and in a power-saving operation mode, the control unit controls the driving unit to drive the motor in a 90 degree conduction method. The refrigerator increases a pulse width of driving current by converting the conduction method of the motor to drive the motor at a low speed during power-saving operation of the refrigerator. | 01-16-2014 |
20140130531 | Compressor Protection And Grid Fault Detection Device - A system includes a control module and a monitor module. The control module selectively operates a component of the system in an ON state. The system receives power from an electrical grid. The monitor module selectively detects a fault event of the electrical grid in response to (i) an amount of current drawn by the component or (ii) a voltage of power received by the component. In response to detecting the fault event, the control module switches the component from the ON state to a second state, determines a first delay period according to a random process, identifies an apparent conclusion of the fault event, and in response to the apparent conclusion of the fault, waits for the first delay period before switching the component back to the ON state. The component consumes less power in the second state than in the ON state. | 05-15-2014 |
20140137587 | METHOD FOR STORING FOOD ITEMS WITHIN A REFRIGERATOR APPLIANCE - A method for storing food items within a refrigerator appliance is provided. The method includes placing a plurality of food items within a chilled chamber of the refrigerator appliance and establishing an identity of each food item of the plurality of food items. The method also includes determining a preferred storage condition of the chilled chamber based upon the identities of the plurality of food items and adjusting a current storage condition of the chilled chamber to about the preferred storage condition. Operating the chilled chamber of the refrigerator appliance at the preferred storage condition can improve a useful life of food items within the chilled chamber. | 05-22-2014 |
20140137588 | AIR CONDITIONER - An air conditioner includes a main refrigerant circuit where refrigerant flows in order of a compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. An injection circuit is configured such that the refrigerant diverges between the outdoor heat exchanger and indoor heat exchanger in the main refrigerant circuit and returns to the compressor having a pressure between a suction pressure of compressor and a discharge pressure of compressor. The injection circuit includes an injection decompression valve reducing a pressure of the refrigerant, a control unit cooling portion cooling a control unit to control the compressor using the refrigerant, and a sub-cooler evaporation portion provided at a downstream side of the injection decompression valve such that heat exchange of the refrigerant is performed in the sub-cooler evaporation portion, and the control unit cooling portion is provided between the injection decompression valve and the sub-cooler evaporation portion in the injection circuit. | 05-22-2014 |
20140202188 | HVAC SYSTEM CONFIGURED TO OBTAIN DEMAND SPECIFIC DATA FROM A REMOTE UNIT THEREOF - An HVAC system that obtains demand specific data from an outdoor unit thereof is provided. An indoor unit controller, an outdoor unit controller and an outdoor unit of the HVAC system are also disclosed. In one embodiment, the outdoor unit controller includes: (1) an interface configured to receive a request for a second portion of demand data from an indoor controller of the HVAC system, wherein the request includes a first portion of the demand data that corresponds to the second portion and (2) a processor configured to respond to the request by determining the second portion based on the first portion and sending the second portion of the demand data to the indoor controller of the HVAC system. | 07-24-2014 |
20140216086 | COOLING SYSTEM AND VEHICLE - A cooling system includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, piping that connects these components and circulates a refrigerant through these components, a cooling unit that is provided in the piping between the first heat exchanger and the expansion valve and that cools a heat-generating source with the refrigerant; and a connection passage communicating a first passage with a second passage, the first passage being the piping between the compressor and the first heat exchanger, the second passage being the piping between the cooling unit and the expansion valve. The first heat exchanger is positioned higher than the cooling unit, and the piping is arranged so that the refrigerant that is condensed by the first heat exchanger is caused to flow into the cooling unit by gravitational force. | 08-07-2014 |
20140216087 | Compressor Clearance Control - A compressor ( | 08-07-2014 |
20140260390 | SYSTEM FOR REFRIGERANT CHARGE VERIFICATION - A diagnostic system for a refrigeration system including a condenser is provided. The diagnostic system may include a controller determining a subcooling temperature of the refrigeration system, an approach temperature of the condenser, and a condenser temperature difference of the condenser. The controller may determine at least one of a fault condition of the refrigeration system and a charge of the refrigeration system based on the subcooling temperature, the approach temperature, and the condenser temperature difference. | 09-18-2014 |
20140331705 | Hydraulic Transport Refrigeration System - A transport refrigeration system includes an engine, a hydraulic pump driven by the engine, a supply line coupled to an output of the pump, a supply control valve coupled to the supply line and a refrigerant compressor coupled to the supply control valve through a compressor supply line. The refrigerant compressor speed is responsive to fluid flow in the compressor supply line. | 11-13-2014 |
20150027155 | COMPRESSOR AND COOLING SYSTEM - A compressor includes: a heat exchanger configured to discharge heat generated during compression outside the compressor; a cooling liquid inlet port through which cooling liquid flowing from outside the compressor into the compressor passes; and a cooling liquid outlet port through which the cooling liquid flowing out of the compressor from inside the compressor passes. The compressor is configured such that an operation mode is switchable between a first mode in which the cooling liquid passing through the cooling liquid inlet port flows in the heat exchanger in a predetermined first direction and passes through the cooling liquid outlet port, and a second mode in which the cooling liquid passing through the cooling liquid inlet port flows in the heat exchanger in a second direction opposite to the first direction and passes through the cooling liquid outlet port. | 01-29-2015 |
20150135753 | AIR-CONDITIONING APPARATUS - It is determined whether thermo-off postponement control is allowed or not on the basis of a current compressor operating frequency when a thermo-off condition is satisfied. If it is determined that thermo-off postponement control is allowed, the thermo-off postponement control in which a lowest operating frequency in an operating frequency range of a compressor is temporarily reduced within a range greater than or equal to a minimum operating frequency of the compressor in use so as to continue an operation. If it is determined that thermo-off postponement control is not allowed, thermo-off of stopping the compressor is performed. | 05-21-2015 |
20150292785 | ENGINE ROTATIONAL SPEED CONTROL APPARATUS - A rotational speed control apparatus for an engine is provided. The engine is configured to drive a compressor and includes an ignition plug. The rotational speed control apparatus includes an electronic control unit. The electronic control unit is configured to: (a) correct a torque of the engine through feedback such that a rotational speed of the engine during idle operation becomes close to a target rotational speed; and (b) adjust the ignition timing such that a reserve torque that is ensured is larger when a first changeover is started than when a second changeover is started, the first changeover being a changeover from a stopped state of the compressor to a driven state of the compressor, the second changeover being a changeover from the driven state of the compressor to the stopped state of the compressor. | 10-15-2015 |
20150316275 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus includes a refrigerant circuit formed by connecting, with pipes, a compressor to compress refrigerant and discharge the compressed refrigerant, a first heat exchanger, a subcooling heat exchanger exchanges heat between a portion of the refrigerant flowing in a first flow passage and another portion of the refrigerant flowing in a second flow passage to subcool the portion of refrigerant flowing in the first flow passage, a first expansion device to decompress the refrigerant, a second heat exchanger, and an accumulator connected to a suction side of the compressor and configured to store excess refrigerant, so that the refrigerant is circulated through the refrigerant circuit. The air-conditioning apparatus is configured to prevent the discharge temperature of the compressor from being excessively increased irrespective of the operation mode and therefore prevent damage to the compressor. | 11-05-2015 |
20150323232 | ACTIVE FILTER CONTROL DEVICE - A harmonic component extraction unit obtains a command value of compensating current from a harmonic component of the load current. A difference current generation unit obtains a deviation between the compensating current and a value obtained by leading a phase of the command value by a predetermined phase difference. A current controller generates a control signal based on output of the difference current generation unit. A driving signal generation circuit generates, based on the control signal, a driving signal driving a parallel active filter. | 11-12-2015 |
20150338135 | REFRIGERATION DEVICE FOR CONTAINER - A blown air temperature sensor detects a temperature of blown air which is being blown into a container after having passed sequentially through an evaporator and a heating device. During cooling and dehumidifying operations, a temperature control section controls a cooling section such that a detected blown air temperature detected by the blown air temperature sensor becomes equal to a target temperature. A target control section sets the target temperature to be a first preset temperature which is equal to a preset inside temperature when the cooling operation is performed, and sets the target temperature to be a second preset temperature which is sum of the preset inside temperature and a target increment temperature once a switch has been made from the cooling operation to the dehumidifying operation. | 11-26-2015 |
20150338145 | HEAT PUMP - A heat pump includes a first cycle device and a second cycle device. The first cycle device is connected such that, in a heating operation, a first refrigerant is circulated in an order of a first compressor, a 4-way valve, a first heat exchanger, a second heat exchanger, a first expansion mechanism, a third heat exchanger, the 4-way valve, and the first compressor, and such that, in a cooling operation, the first refrigerant is circulated in an order of the first compressor, the 4-way valve, the third heat exchanger, the first expansion mechanism, the second heat exchanger, the first heat exchanger, the 4-way valve, and the first compressor. The second cycle device is connected such that a second refrigerant is circulated in an order of a second compressor, a fourth heat exchanger, a second expansion mechanism, the second heat exchanger, and the second compressor. | 11-26-2015 |
20150354880 | MOTOR DRIVING DEVICE AND AIR CONDITIONER INCLUDING THE SAME - A motor driving device and an air conditioner including the same are disclosed. The motor driving device includes a rectifier to rectify input AC power, a boost converter to boost power rectified by the rectifier, a capacitor to store a pulsating voltage from the boost converter, an inverter comprising a plurality of switching elements, the inverter transforming AC power, using a voltage across the capacitor, and outputting the transformed power to a motor, a regenerative power consuming unit arranged between the capacitor and the inverter, to consume regenerative power from the motor, and a switching driving unit to output a switching control signal to a switching element in the regenerative power consuming unit while outputting an operation control signal to an inverter controller when the voltage across the capacitor is equal to or higher than a predetermined voltage. | 12-10-2015 |
20150354881 | MOTOR DRIVING DEVICE AND AIR CONDITIONER INCLUDING THE SAME - A motor driving device and an air conditioner including the same are disclosed. The motor driving device includes a rectifier to rectify input AC power, a boost converter to boost power rectified by the rectifier, a capacitor to store a pulsating voltage from the boost converter, an inverter comprising a plurality of switching elements, the inverter transforming AC power, using a voltage across the capacitor, and outputting the transformed power to a motor, a regenerative power consuming unit arranged between the capacitor and the inverter, to consume regenerative power from the motor, and a switching driving unit to output a switching control signal to a switching element in the regenerative power consuming unit while outputting an operation control signal to an inverter controller when the voltage across the capacitor is equal to or higher than a predetermined voltage. | 12-10-2015 |
20150362199 | AIR CONDITIONING APPARATUS - Art air conditioning apparatus includes a refrigerant circuit having a compressor, a radiator, an upstream side expansion valve, a receiver, a downstream side expansion valve, an evaporator, and a receiver gas vent pipe. Gas vent control is performed so that gas refrigerant is led from a receiver to the suction side of a compressor via a receiver gas vent pipe by opening a receiver gas vent valve. Upstream side expansion valve subcooling control is performed so that the opening of an upstream side expansion valve is changed such that the subcooling of refrigerant is set to target subcooling at the outlet of a radiator. Downstream side expansion valve suction wetting control is performed so that the opening of a downstream side expansion valve is changed such that refrigerant is in a wetting state and the dryness is set to target dryness at the outlet of an evaporator. | 12-17-2015 |
20150369497 | AIR CONDITIONER - The present invention relates to an air conditioner that adjusts room temperature to a set temperature, and the problem to be solved thereby is to reduce the frequency of occurrence of situations in which the room temperature does not approach the set temperature. In the air conditioner, a target suction pressure is set to a value obtained by subtracting, from an evaporation pressure of an indoor heat exchanger, a pressure loss estimation value from an inlet of the indoor heat exchanger to a suction port of a compressor so that an evaporation temperature of the indoor heat exchanger is maintained constant. The displacement of the compressor is controlled so that the suction pressure becomes equal to the target suction pressure. A deviation determination unit determines whether the room temperature is stabilized at a temperature deviated from the set temperature. When the deviation determination unit determines that the room temperature is deviated from the set temperature, a controller changes the pressure loss estimation value so that the room temperature approaches the set temperature. | 12-24-2015 |
20150374143 | SHOWCASE COOLING DEVICE - There is disclosed a showcase cooling device which is capable of cooling all of a plurality of showcases with no difficulty, while suppressing a power consumption of a compressor. A showcase cooling device | 12-31-2015 |
20160010909 | VEHICULAR AIR CONDITIONER | 01-14-2016 |
20160047579 | Increased Efficiency of Crank Case Heating Using Pulsed Stator Heat - A compressor heating system may include a compressor drive controller electrically coupled to an outdoor controller configured to selectively implement a pulse width modulation algorithm to deliver a pulsed DC current from the compressor drive controller to at least one stator winding of a motor of a variable speed compressor to provide more efficient auxiliary heating to the compressor to prevent refrigerant migration to the compressor when the compressor remains idle with respect to operating in a cooling or heating mode. The compressor heating system may consume less off-cycle power than traditional compressor auxiliary heating systems, thus complying with regulatory requirements where off-cycle power must average below specific thresholds. | 02-18-2016 |
20160049783 | BACKFLOW PREVENTING DEVICE, POWER CONVERSION DEVICE, AND REFRIGERATION AIR-CONDITIONING APPARATUS - A backflow preventing device includes a backflow preventing element connected between a power source and a load, for preventing a backflow of a current from the load side to the power source side, a commutation device configured to perform a commutation operation of causing a current to flow through an other path connected in parallel to the backflow preventing element, and a controller configured to change a pulse width of a commutation drive signal for controlling the commutation device to perform the commutation operation based on a current flowing through the backflow preventing element, and transmitting the commutation drive signal having the changed pulse width to the commutation device. The controller transmits the pulse to the commutation device only for a necessary time period so that the commutation device performs the commutation operation, to thereby reduce electric power relating to the commutation operation not contributing to the power conversion. | 02-18-2016 |
20160097575 | MOTOR ASSEMBLY WITH INTEGRATED ON/OFF DETECTION WITH SPEED PROFILE OPERATION - A motor assembly configured to receive an external alternating voltage. The motor assembly includes a motor and a circuit assembly. The motor includes a stator and a rotor rotatable about a longitudinal axis. The circuit assembly includes a state detector and a control unit. The state detector is operable to detect whether an external device is receiving the external alternating voltage The control unit is operable to control the motor based on whether the external device is receiving the external alternating voltage. | 04-07-2016 |
20160156281 | POWER CONVERSION DEVICE AND REFRIGERATION AIR-CONDITIONING APPARATUS | 06-02-2016 |
20160377086 | COMPRESSOR AND CHILLER SYSTEM INCLUDING A COMPRESSOR - A compressor and a chiller system including a compressor are provided. The compressor may include one or more impellers that draws a refrigerant in an axial direction and compresses the refrigerant in a radial direction, a rotating shaft that rotates the one or more impellers, and at least one displacement sensor that detects a displacement of the rotating shaft. The displacement sensor may include a flexible circuit board and coils provided on both sides of the flexible circuit board. The flexible circuit board may include a plurality of boards which may be connected to each other by one or more connectors. | 12-29-2016 |
20190145681 | COMPRESSOR UNIT, REFRIGERATION CIRCUIT COMPRISING THE SAME AND METHOD OF OPERATING A COMPRESSOR UNIT | 05-16-2019 |