Transferring Heat Between Diverse Function Portions Of Refrigeration Cycle Patents (Class 62/113)
  • Patent number: 10767906
    Abstract: A system includes a high side heat exchanger, a first load, a second load, a first compressor, a second compressor, and a third compressor. The high side heat exchanger removes heat from a refrigerant. The first load uses the refrigerant to remove heat from a first space proximate the first load. The second load uses the refrigerant to remove heat from a second space proximate the second load. The first compressor compresses the refrigerant from the first load and sends the refrigerant to the first load. The refrigerant defrosts the first load. The second compressor compresses the refrigerant from the second load and the refrigerant from the first load that defrosted the first load. The third compressor compresses the refrigerant from the first compressor.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: September 8, 2020
    Assignee: Heatcraft Refrigeration Products LLC
    Inventors: Shitong Zha, Xi Sun
  • Patent number: 10718560
    Abstract: Disclosed are a refrigerator and a control method thereof. The refrigerator according to one aspect includes a main body having a storage chamber; a compressor configured to compress a refrigerant; a condenser configured to condense the refrigerant compressed by the compressor; an evaporation expander configured to depressurize the refrigerant condensed by the condenser; a first evaporator configured to evaporate the refrigerant depressurized by the evaporation expander and thus to cool the storage chamber; a condensing expander installed between the condenser and the evaporation expander and configured to depressurize the refrigerant condensed by the condenser; and a subsidiary condenser installed between the condensing expander and the evaporation expander and configured to condense the refrigerant depressurized by the condensing expander.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: July 21, 2020
    Assignee: LG Electronics Inc.
    Inventors: Heayoun Sul, Dongseok Kim
  • Patent number: 10661631
    Abstract: A heat pump cycle includes a compressor, a first interior heat exchanger, a separator that separates a refrigerant discharged from the compressor into a gas-phase refrigerant which does not include a lubricant and a remaining refrigerant, an exterior heat exchanger that performs heat exchange between the remaining refrigerant flowing out of the separator and an outside air, a second interior heat exchanger, a control valve, an accumulator, and a first bypass passage that bypasses the second interior heat exchanger and connects to an inlet side of the accumulator. The heat pump cycle heats an air flow in the first interior heat exchanger and controls the control valve to reduce the pressure of the refrigerant, in a state where the refrigerant circulates in a refrigerant circuit including the first bypass passage while accumulating the gas-phase refrigerant flowing out of the separator in the second interior heat exchanger.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: May 26, 2020
    Assignee: DENSO CORPORATION
    Inventor: Hiroaki Kawano
  • Patent number: 10557643
    Abstract: A dedicated outside air system comprising a combined variable refrigerant flow and variable air flow that provides ventilation in an energy efficient way or otherwise as desired.
    Type: Grant
    Filed: January 14, 2017
    Date of Patent: February 11, 2020
    Assignee: Addison HVAC LLC
    Inventor: John Nelson
  • Patent number: 10512882
    Abstract: A drying and filtering device used for drying and filtering compressed air comprises a housing (10) having a cavity (11), an upper cover (20) disposed on the roof of the housing (10), a lower cover (30) having a drainage port (31) disposed at the bottom of the housing (10), and a cooling tube (40) disposed in the housing (10). An air inlet (21) and an air outlet (22) are provided at two sides of the upper cover (20). The cavity (11) being in communication with the air inlet (21), the air outlet (22), and the drainage port (31) respectively. The cooling tube (40) is disposed in the cavity (11) and extends from a position near the upper cover (20) downward to the lower cover (30). Compressed air enters the cavity (11) from the air inlet (21) on the upper cover (20), and contacts the cooling tube (40).
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: December 24, 2019
    Assignee: Biteman Technology Co., Ltd.
    Inventor: Yinghui Guo
  • Patent number: 10508841
    Abstract: Systems and methods for controlling a cooling circuit for a variable frequency drive (VFD) in an HVACR system are disclosed. The method includes determining, by a controller, an operating condition of a heat sink associated with the VFD. The controller determines whether a temperature of the heat sink is greater than or equal to a heat sink temperature threshold. The method further includes enabling a bypass flow control device in response to the heat sink temperature being greater than or equal to the heat sink temperature threshold.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: December 17, 2019
    Assignee: TRANE INTERNATIONAL INC.
    Inventor: Robert J. Roth
  • Patent number: 10317120
    Abstract: An air conditioning system according to the present invention changes a target supply temperature based on a magnitude relationship between an operating frequency of a first compressor and a first frequency at which an operating efficiency of the first compressor reaches a maximum, and a magnitude relationship between an operating frequency of a second compressor and a second frequency at which an operating efficiency of the second compressor reaches a maximum.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: June 11, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mamoru Hamada, Masaki Toyoshima, Hayato Horie
  • Patent number: 10184472
    Abstract: A scroll compressor and an air conditioner including a scroll compressor are provided.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: January 22, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Byoungjin Ryu, Younghwan Ko, Byeongsu Kim, Beomchan Kim, Baikyoung Chung
  • Patent number: 10139141
    Abstract: A combined evaporator and condenser (1100) is manufactured from a number of stacked heat exchanger plates (980) provided with a pressed pattern of ridges and grooves for keeping the plates on a distance from one another for creating interplate flow channels (1180, 1200). The evaporator portion (1120, 1150) of the combined evaporator and condenser (1100) has a coolant outlet connectable to an expansion valve (R), and a connection between the condenser portion and the expansion valve (R) runs through the evaporator portion.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: November 27, 2018
    Assignee: SWEP INTERNATIONAL AB
    Inventors: Sven Andersson, Tomas Dahlberg
  • Patent number: 10139142
    Abstract: An object is to provide a refrigeration cycle apparatus that does not cause unevenness of capacity among branch units and a failure in controlling a refrigerant circuit. At least one of branch units is a first branch unit having a minimum pressure loss in distribution of refrigerant in a high-pressure refrigerant pipe between a heat source unit and the branch units, and at least another one of the branch units is a second branch unit having a maximum pressure loss in distribution of refrigerant in the high-pressure refrigerant pipe between the heat source unit and the branch units. An opening degree of an expansion device is controlled in such a manner that a differential pressure between a refrigerant pressure detected by a high-pressure detecting device of the first branch unit and a refrigerant pressure detected by an intermediate-pressure detecting device is greater than or equal to a set value ?PHM.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: November 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kosuke Tanaka, Yuji Motomura
  • Patent number: 10131207
    Abstract: There is disclosed a vehicle air-conditioning device in which a heating qualification by gas injection can sufficiently be obtained. The vehicle air-conditioning device comprises a compressor 2 which compresses a refrigerant, an air flow passage 3 through which air to be supplied into a vehicle interior flows, a radiator 4 disposed in the air flow passage to let the refrigerant radiate heat, a heat absorber 9 disposed in the air flow passage to let the refrigerant absorb heat, an outdoor heat exchanger 7 disposed outside the vehicle interior to let the refrigerant radiate or absorb heat, and a controller. The controller executes a heating mode in which the refrigerant discharged from the compressor 2 radiates heat in the radiator 4 and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger 7.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: November 20, 2018
    Assignee: Sanden Holdings Corporation
    Inventors: Kenichi Suzuki, Megumi Shigeta
  • Patent number: 10110098
    Abstract: An integrated system includes a controller, a drive device, a fastening supporting member, and a fixing member. The controller has a controller connector. The drive device has a drive device connector that is connected to the controller connector so that the drive device is electrically coupled to the controller. Via the fastening supporting member, the controller and the drive device are maintained in an electrically coupled state in which the drive device connector is connected to the controller connector. Via the fixing member, the controller and the drive device are maintained in a mechanically coupled state in which the drive device is mechanically coupled to the controller.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: October 23, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tadahiro Fukushima, Tsukasa Aiba, Takahiro Hagimoto
  • Patent number: 10056539
    Abstract: The present disclosure is drawn to electrocaloric devices, methods of making electrocaloric integrated circuits, and methods of thermally cycling integrated circuits. The electrocaloric device can include an electrocaloric material having a solid solution of two or more components of BNT, BKT, BZT, BMgT, or BNiT. The electrocaloric material can have an ergodic transition temperature within a range of 50 C to 300 C. The device can also include electrodes associated with the electrocaloric material, as well as an electrical source to add or reduce electrical field between the electrodes across the electrocaloric material to generate heating or cooling relative to the ergodic transition temperature of the electrocaloric material.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: August 21, 2018
    Assignees: Oregon State University, Hewlett-Packard Development Company, L.P.
    Inventors: David Cann, Brady Gibbons, Troy Ansell, James Elmer Abbot, Jr.
  • Patent number: 10036562
    Abstract: An air-conditioning apparatus divides an outdoor heat exchanger to form parallel heat exchangers and supplies part of refrigerant from a compressor to the parallel heat exchangers alternately to perform defrosting, performs medium-pressure defrosting in which part of the refrigerant from the compressor is decompressed and supplied to a parallel heat exchanger to be subjected to defrosting, and the refrigerant after being used for defrosting is injected into the compressor. A first flow switching unit performs switching of a connection mode of ends of the parallel heat exchangers on compressor side, where the pressure changes among high pressure, medium pressure, and low pressure according to operation contents, to one of three modes: a mode with the ends connected to the compressor discharge side, a mode with the ends connected to the compressor suction side, and a mode with the ends connected to neither the discharge nor suction side.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: July 31, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Takeshi Hatomura
  • Patent number: 9989281
    Abstract: An air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a converting unit, a first injection module, and a second injection module. The first injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in a heating operation and supercools refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger in a cooling operation. The second injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in the heating operation and injects refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger to the compressor in the cooling operation.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: June 5, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Byeongsu Kim, Beomchan Kim, Younghwan Ko, Byoungjin Ryu
  • Patent number: 9970695
    Abstract: An oil separation device (14) for separating oil from a refrigerant-oil-mixture in a refrigeration cycle (1), the oil separation device (14) comprises a first refrigerant conduit having at least a first portion (16) with a first diameter (d1); a second refrigerant conduit arranged downstream of and connected to the first refrigerant conduit, the second refrigerant conduit having at least a second portion with a second diameter (d2) being smaller than the first diameter (d1); wherein the second portion (18) of the second refrigerant conduit having the second diameter (d2) extends into the first portion (16) of the first refrigerant conduit forming an oil separation pocket (32) between the outer diameter of the second portion (18) and the inner diameter of the first portion (16); and a suction line (20) having an inlet end (19), which opens into the oil separation pocket (32) and is configured to suck oil from the oil separation pocket (32).
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: May 15, 2018
    Assignee: CARRIER CORPORATION
    Inventors: Sascha Hellmann, Alexander Tambovtsev
  • Patent number: 9863674
    Abstract: An evaporator system that includes: a first evaporator coil at a first evaporator temperature and pressure; a second evaporator coil at a second evaporator temperature and pressure that is less than the first evaporator temperature and pressure where the first evaporator and second evaporator are configured to be thermally disjointed; and a plurality of thermally conductive spaced apart evaporator fins having a plurality of spaced apart thermal break portions positioned between the first evaporator coil and the second evaporator coil that thermally disjoin the first evaporator and the second evaporator.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: January 9, 2018
    Assignee: Whirlpool Corporation
    Inventors: Steven Kuehl, Nihat Cur, Guolian Wu
  • Patent number: 9796246
    Abstract: A heat pump device is provided with: a first refrigerant guide-in unit that guides in the high temperature, high pressure refrigerant discharged by the compressor from outside the housing; a water refrigerant heat exchanger that can dissipate heat from the high temperature, high pressure refrigerant guided in from the first refrigerant guide-in unit into a cooling fluid; and a housing accommodating the water refrigerant heat exchanger. The heat pump device is further provided with a cooling fluid guide-in unit that can guide the cooling fluid from outside the housing into the water refrigerant heat exchanger, a cooling fluid guide-out unit that can guide the cooling fluid out of the water refrigerant heat exchanger to the outside of the housing, and a first refrigerant guide-out unit that guides the refrigerant that has passed through the water refrigerant heat exchanger to the outside of the housing.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: October 24, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Yoshitoshi Noda
  • Patent number: 9746226
    Abstract: A refrigerator includes a compressor compressing a refrigerant, a condenser condensing the refrigerant compressed in the compressor, a refrigerant tube guiding a flow of the refrigerant condensed in the condenser, an expansion device decompressing the refrigerant condensed in the condenser, and an evaporator evaporating the refrigerant decompressed in the expansion device. The evaporator includes an evaporation tube through which the refrigerant decompressed in the expansion device flows, a coupling tube through a refrigerant heat-exchanged with the refrigerant of the evaporator flows, and a heat-exchange fin coupled to the evaporation tube and the coupling tube.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: August 29, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Sangbong Lee, Jangseok Lee, Hyoungkeun Lim, Myungjin Chung, Minkyu Oh, Namsoo Cho
  • Patent number: 9733000
    Abstract: A refrigeration apparatus includes a compressor, a heat source-side heat exchanger, a receiver, a utilization-side heat exchange, a receiver degassing pipe interconnecting an upper portion of the receiver and a suction side of the compressor, and a receiver liquid level detection pipe connected to the receiver. The receiver liquid level detection pipe detects whether or not liquid level in the receiver has reached a predetermined position on a lower side of a position where the receiver degassing pipe is connected. The receiver liquid level detection pipe merges with the receiver degassing pipe via a capillary tube. The receiver degassing pipe has a refrigerant heater to heat refrigerant flowing through the receiver degassing pipe. Whether or not the liquid level in the receiver has reached the predetermined position is detected using a temperature of refrigerant flowing though the receiver degassing pipe.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: August 15, 2017
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Kawano, Junya Minami, Mari Susaki, Masahiro Oka
  • Patent number: 9702572
    Abstract: Provided is a solar dehumidifying and cooling system including a solar hot water device that produces hot water by using solar heat and a dehumidifying and cooling device that performs cooling through heat exchange with the hot water that is supplied from the solar hot water device.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: July 11, 2017
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dae Young Lee, Sung Chul Shin
  • Patent number: 9686891
    Abstract: Thermoelectric-enhanced, rack-level cooling of airflow entering an electronics rack is provided by a cooling apparatus, which includes: an air-to-liquid heat exchanger; a coolant loop coupled to the heat exchanger, the coolant loop including a first loop portion and a second loop portion, where the heat exchanger exhausts heated coolant to the first loop portion and receives cooled coolant from the second loop portion. The cooling apparatus further includes a heat rejection unit and a thermoelectric heat pump(s). The heat rejection unit is coupled to the coolant loop between the first and second loop portions, and provides partially-cooled coolant to the second loop portion. The thermoelectric heat pump is disposed with the first and second loop portions coupled to opposite sides to transfer heat from the partially-cooled coolant within the second loop portion to provide the cooled coolant before entering the air-to-liquid heat exchanger.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: June 20, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Levi A. Campbell, Milnes P. David, Dustin W. Demetriou, Michael J. Ellsworth, Jr., Roger R. Schmidt, Robert E. Simons
  • Patent number: 9625183
    Abstract: A system and method for a CO2 refrigeration system includes a compressor, a heat exchanger, a liquid receiver, a first valve, and a valve controller. The heat exchanger operates as a gas cooler when the CO2 refrigeration system is in a transcritical mode and as a condenser when the CO2 refrigeration system is in the subcritical mode. The first valve controls a flow of refrigerant from the heat exchanger to the liquid receiver. The valve controller monitors an outdoor ambient temperature and a pressure of refrigerant exiting the heat exchanger, determines whether the CO2 refrigeration system is in the subcritical mode or in the transcritical mode, determines a pressure setpoint based on the monitored outdoor ambient temperature, and controls the first valve based on a comparison of the determined pressure setpoint and the monitored pressure when the CO2 refrigeration system is in the transcritical mode.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: April 18, 2017
    Assignee: Emerson Climate Technologies Retail Solutions, Inc.
    Inventors: John Wallace, Franklin Beltran, Samuele Da Ros
  • Patent number: 9629286
    Abstract: Thermoelectric-enhanced, rack-level cooling of airflow entering an electronics rack is provided by a cooling apparatus, which includes: an air-to-liquid heat exchanger; a coolant loop coupled to the heat exchanger, the coolant loop including a first loop portion and a second loop portion, where the heat exchanger exhausts heated coolant to the first loop portion and receives cooled coolant from the second loop portion. The cooling apparatus further includes a heat rejection unit and a thermoelectric heat pump(s). The heat rejection unit is coupled to the coolant loop between the first and second loop portions, and provides partially-cooled coolant to the second loop portion. The thermoelectric heat pump is disposed with the first and second loop portions coupled to opposite sides to transfer heat from the partially-cooled coolant within the second loop portion to provide the cooled coolant before entering the air-to-liquid heat exchanger.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: April 18, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Levi A. Campbell, Milnes P. David, Dustin W. Demetriou, Michael J. Ellsworth, Jr., Roger R. Schmidt, Robert E. Simons
  • Patent number: 9459028
    Abstract: A vehicular heat pump system utilizing intermediate gas recompression is provided. The heat pump system is for use in a vehicle having a battery and a passenger compartment. The heat pump system may include a heating circuit and a cooling circuit each including a compressor having a first inlet and a second inlet and a vapor-liquid separator configured to separate intermediate pressure refrigerant supplied by a first expansion device into refrigerant in a gaseous state flowing therethrough and refrigerant in a liquid state flowing therethrough. The vapor-liquid separator may be configured to selectively inject refrigerant in a gaseous state into the compressor at the second inlet to increase the mass flow rate of the refrigerant. This allows the heat pump system to operate effectively in cold ambient temperatures. A method of operating a heat pump system utilizing intermediate gas recompression is also provided.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: October 4, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Bryan M. Styles, Mark D. Nemesh, Harry E. Eustice, Mukund S. Wankhede
  • Patent number: 9429345
    Abstract: A heating and cooling system includes an evaporator, a compressor, and a condenser. A heat exchanger, which may be an outdoor heat exchanger, is configured to receive the refrigerant from the condenser, to selectively extract heat from or to add heat to the refrigerant, and to transfer the refrigerant to the evaporator. First control valving, disposed between the condenser and the heat exchanger, is configured to regulate flow of the refrigerant from the condenser to the heat exchanger in a first mode of operation. Second control valving, disposed between the condenser and the heat exchanger, is configured to regulate flow of the refrigerant from the heat exchanger to the evaporator in a second mode of operation. The system may be operated in a variety of modes by appropriate control of the valving and other system components.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: August 30, 2016
    Assignee: Johnson Controls Technology Company
    Inventors: William L. Kopko, Ian Michael Casper, Douglas Alan Kester, Satheesh Kulankara
  • Patent number: 9429347
    Abstract: A refrigeration apparatus includes a high-temperature side circulation circuit, a low-temperature side circulation circuit, a cascade capacitor, and control means. The high-temperature side circulation circuit forms a refrigerant circuit in which a high-temperature side compressor, a high-temperature side condenser, a high-temperature side expansion device, and a high-temperature side evaporator are connected by a pipe. The refrigerant circuit allows a high-temperature side refrigerant to circulate therethrough. The high-temperature side refrigerant has a carbon-carbon double bond in its molecular structure. The high-temperature side compressor has a variable discharge capacity and is configured to discharge the high-temperature side refrigerant. The low-temperature side circulation circuit forms a refrigerant circuit in which a low-temperature side compressor, a low-temperature side condenser, a low-temperature side expansion device, and a low-temperature side evaporator are connected by a pipe.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: August 30, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takeshi Sugimoto, Tetsuya Yamashita, Takashi Ikeda
  • Patent number: 9212834
    Abstract: Disclosed is a method and device for a thermal energy storage liquid-suction heat exchanger (TES-LSHX) for air conditioning and refrigeration (AC/R) applications. The disclosed embodiments allow energy to be stored and aggregated over one period of time, and dispatched at a later period of time, to improve AC/R system efficiency during desired conditions. Not only are the benefits of LSHX stored and aggregated for later use, but when dispatched, the discharge rate can exceed the charge rate thereby further enhancing the benefit of demand reduction to utilities. The disclosed embodiments allow great flexibility and can be incorporated into OEM AC/R system designs, and/or bundled with condensing units or evaporator coils. These TES-LSHX systems can be retrofit with existing systems by installing the product at any point along the existing AC/R system's line set.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: December 15, 2015
    Assignee: GREENER-ICE SPV, L.L.C.
    Inventors: Brian Parsonnet, Robert R. Willis, Jr., Dean L. Wiersma
  • Patent number: 9194894
    Abstract: A sensor module for a compressor having an electric motor connected to a power supply is provided. The sensor module includes an input that receives current measurements generated by a current sensor based on a current of the power supply. The sensor module also includes a processor. The processor is connected to the input, determines a maximum continuous current for the electric motor, and selectively compares the current measurements with a value equal to the maximum continuous current multiplied by a predetermined value. The maximum continuous current is set based on at least one of a type of refrigerant used by the compressor and actual refrigeration system conditions.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: November 24, 2015
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Nagaraj Jayanth, Troy W. Renken
  • Patent number: 9091464
    Abstract: An air conditioner includes a plurality of compressors, a condenser that condenses a refrigerant compressed in the plurality of the compressors, an expansion device that expands the refrigerant discharged from the condenser, and an evaporator that evaporates the refrigerant expanded in the expansion device. A first path diverges between the condenser and the evaporator to supply a portion of the refrigerant discharged from the condenser to at least one of the plurality of compressors. A second path diverges between the condenser and the evaporator to supply a portion of the refrigerant discharged from the condenser to a path between the plurality of compressors.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: July 28, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Pilhyun Yoon, Yongcheol Sa
  • Patent number: 9057547
    Abstract: Surged heat pump systems, devices, and methods are disclosed having refrigerant phase separators that generate at least one surge of vapor phase refrigerant into the inlet of an evaporator during an on cycle of the compressor. This surge of vapor phase refrigerant, having a higher temperature than the liquid phase refrigerant, increases the temperature of the evaporator inlet, thus reducing frost build up in relation to conventional refrigeration systems lacking a surged input of vapor phase refrigerant to the evaporator. The temperature of the vapor phase refrigerant is raised in relation to the liquid phase with heat from the liquid by the phase separation, not by the introduction of energy from another source. The surged heat pump systems may operate in highest heat transfer efficiency mode and/or in one or more higher temperature modes.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: June 16, 2015
    Assignee: XDX Global, LLC
    Inventor: David Wightman
  • Patent number: 9032756
    Abstract: Provided is an air conditioner. The air conditioner includes a compressor, a condenser, an expansion device, an evaporator, and a supercooling device configured to supercool a refrigerant passing through the condenser. The supercooling device includes a supercooling main body in which the refrigerant passing through the condenser and a refrigerant to be injected into the compressor are introduced, a first passage disposed within the supercooling main body so that the refrigerant passing through the condenser flows in one direction, a second passage disposed on a side of the first passage so that the refrigerant passing through the condenser flows in the other direction, and a third passage in which the refrigerant to be injected into the compressor flows, the third passage being heat-exchanged with at least one of the first and second passages.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: May 19, 2015
    Assignee: LG Electronics Inc.
    Inventors: Beomchan Kim, Byoungjin Ryu, Yonghee Jang, Younghwan Ko, Byeongsu Kim
  • Patent number: 8955346
    Abstract: Apparatus and method are provided for cooling an electronic component. The apparatus includes a coolant-cooled structure in thermal communication with the component(s) to be cooled, and a coolant-to-refrigerant heat exchanger coupled in fluid communication with the coolant-cooled structure via a coolant loop to receive coolant from and supply coolant to the coolant-cooled structure. The apparatus further includes a refrigerant loop coupled in fluid communication with the coolant-to-refrigerant heat exchanger, and the heat exchanger cools coolant passing therethrough by dissipating heat from the coolant in the coolant loop to refrigerant in the refrigerant loop. A controllable coolant heater is associated with the coolant loop for providing an adjustable heat load on the coolant in the coolant loop to ensure at least a minimum heat load is dissipated from the coolant to the refrigerant passing through the heat exchanger.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: February 17, 2015
    Assignee: International Business Machines Corporation
    Inventors: Levi A. Campbell, Richard C. Chu, Michael J. Ellsworth, Jr., Madhusudan K. Iyengar, Robert E. Simons
  • Publication number: 20150007594
    Abstract: A method, and or process, of achieving a double-wall heat recovery refrigeration condenser system, capable, within a single compound condenser, of energy transfer to a heat recovery heat sink, or multiple heat recovery heat sinks, as well as a heat rejection sink, in, any combination of, or all of, the individual heat sinks, in any ratio, requiring no change in the amount of active working fluid, typically a refrigerant, charge requirement. The compound condenser thus eliminates the need for working fluid storage, and controls for controlling said storage, found in typical multi heat sink condenser systems, and also, thus eliminates the complexity associated with said controls and storage. This manner of condenser is used as part of a vapor compression refrigeration system to typically, but not exclusively, reclaim heat from a refrigeration process, for the purpose of heating water.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: Lance C. Laufer, David A. Jones
  • Patent number: 8899058
    Abstract: Heating equipment, including a first heat exchanger, a compressor, a second heat exchanger, and a first expansion valve that decompresses a refrigerant flowing from the second heat exchanger to the first heat exchanger, are connected so as to circulate the refrigerant. A third heat exchanger provides heat of the refrigerant flowing from the second heat exchanger to the first heat exchanger to the refrigerant flowing from the first heat exchanger toward the compressor. An injection circuit merges part of the refrigerant flowing from the second heat exchanger to the first heat exchanger with the refrigerant that is sucked by the compressor. An injection expansion valve is installed in the injection circuit and decompresses the refrigerant flowing in the injection circuit. A fourth heat exchanger is installed in the injection circuit to supply heat of the refrigerant flowing from the second heat exchanger toward the first heat exchanger to the refrigerant flowing in the injection circuit.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: December 2, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumitake Unezaki, Makoto Saitou, Tetsuji Saikusa, Masanori Aoki, Masato Yosomiya
  • Publication number: 20140298824
    Abstract: An aircraft cooling system including a cooler having a cold transfer circuit, in which a cold transfer medium circulates. The cooler supplies cooling energy to an aircraft device to be cooled. The aircraft cooling system further includes a heat transfer arrangement having a heat transfer circuit, in which a heat transfer medium circulates and which is thermally coupled to the cold transfer circuit of the cooler via a heat exchanger, in order to absorb waste heat generated by the cooler and transfer it to a cabin air extraction system. The heat transfer arrangement further includes at least one heat pump which brings about an increase of the heat energy transfer from the cold transfer medium circulating in the cold transfer circuit of the cooler to the heat transfer medium circulating in the heat transfer circuit, at least in certain operating phases of the aircraft cooling system.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 9, 2014
    Applicant: Airbus Operations GmbH
    Inventors: Torsten Truemper, Matthias Reiss
  • Publication number: 20140260248
    Abstract: A cooling system and process in an OTEC system are described where the sub-cooled working liquid from the working fluid pump outlet is used to cool the working fluid pump motor, either directly or indirectly via heat exchange with a secondary fluid. The heat from the motor that is being rejected into the working fluid just prior to the working fluid flowing to the evaporator helps to alleviate heat duty in the evaporator meaning more potential for the evaporator to create energy. Also, because two-phase evaporators, such as those in an OTEC system, are less efficient than single-phase heat exchangers at single-phase heating, this pre-heating of the working fluid will help the evaporator performance substantially.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 18, 2014
    Applicant: LOCHEED MARTIN CORPORATION
    Inventors: Eugene C. JANSEN, Benjamin S. BALBIR
  • Patent number: 8833096
    Abstract: A heat exchange assembly and apparatus and method employing the heat exchange assembly are provided. The heat exchange assembly includes a coolant-to-refrigerant heat exchanger and a heater. The heat exchanger includes a coolant inlet and a coolant outlet for passing a coolant through the heat exchanger, and a refrigerant inlet and a refrigerant outlet for separately passing a refrigerant through the heat exchanger. The heat exchanger cools coolant passing through the heat exchanger by dissipating heat from coolant passing through the heat exchanger to refrigerant passing through the heat exchanger. The heater is integrated with the heat exchanger and applies an auxiliary heat load to refrigerant passing through the heat exchanger to facilitate ensuring that refrigerant passing through the heat exchanger absorbs at least a specified minimum heat load, for example, to ensure that refrigerant egressing from the refrigerant outlet of the heat exchanger is superheated vapor refrigerant.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: September 16, 2014
    Assignee: International Business Machines Corporation
    Inventors: Levi A. Campbell, Richard C. Chu, Michael J. Ellsworth, Jr., Madhusudan K. Iyengar, Robert E. Simons
  • Patent number: 8720216
    Abstract: The hybrid aqua-ammonia and lithium bromide-water absorption chiller is an aqua-ammonia absorption refrigeration system integrated with a lithium bromide-water absorption refrigeration system. By integrating a solar-powered lithium bromide-water absorption refrigeration system into the aqua-ammonia absorption refrigeration system, evaporator temperatures below the freezing point of water may be generated at lower operating pressures and lower generator temperatures than in conventional aqua-ammonia absorption refrigeration systems.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: May 13, 2014
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Syed A. M. Said, Maged A. I. El-Shaarawi, Muhammad Umar Siddiqui
  • Patent number: 8713950
    Abstract: In a method of the application, cooling energy is produced by a refrigerating device. The cooling energy produced by the refrigerating device is supplied to at least one cooling station by a cooling circuit, circulating in which is a refrigerant, which upon release of its cooling energy to the at least one cooling station is converted from the liquid to the gaseous state and is then converted back to the liquid state by corresponding pressure- and temperature control in the cooling circuit. Upon transfer of the cooling system to its state of rest, a control value disposed in the cooling circuit is controlled in such a way that a desired operating pressure (??) arises in the cooling circuit downstream of the control valve. Refrigerant cooled by the refrigerating device is received in a reservoir disposed upstream of the control valve in the cooling circuit.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: May 6, 2014
    Assignee: Airbus Operations GmbH
    Inventor: Sebastian Roering
  • Publication number: 20130312441
    Abstract: A heat exchanger assembly includes a plurality of tubes, each having an inlet end and an outlet end. An inlet header is configured to receive a cooling fluid and to distribute the cooling fluid to the inlet ends of the plurality of tubes. An outlet header includes an outer shell and defines an outlet chamber. The outlet chamber is configured to receive cooling fluid discharged from the outlet ends of the plurality of tube. A supply conduit supplies the cooling fluid to the inlet header. The supply conduit includes a conduit portion extending through the outlet header.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 28, 2013
    Applicant: Hussmann Corporation
    Inventor: Steve L. Fritz
  • Patent number: 8590327
    Abstract: 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.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: November 26, 2013
    Assignee: Panasonic Healthcare Co., Ltd.
    Inventors: Ryuzo Tobe, Tetsuo Sakurai, Ryuichi Tsuruma
  • Patent number: 8584485
    Abstract: An aircraft cooling system evaporator arrangement has an evaporation device including four evaporators that are hydraulically separate from each other with respect to coolant flow. Refrigerant flows from a feed line into first and second evaporators, from the first evaporator into and through a third evaporator, and from the second evaporator into and through a fourth evaporator. The first and third evaporators define a first pair of evaporators arranged parallel to a second pair of evaporators defined by the second and fourth evaporators. First and second coolant supply lines of a first coolant circuit supply coolant to one of the evaporators in each of the first and second pair of evaporators respectively, and first and second coolant supply lines of a second, independent coolant circuit supply coolant to the other of the evaporators in each of the first and second pair of evaporators respectively.
    Type: Grant
    Filed: September 1, 2008
    Date of Patent: November 19, 2013
    Assignee: Airbus Operations GmbH
    Inventors: Wolfgang Ebigt, Wilson Willy Casas Noriega
  • Patent number: 8584484
    Abstract: An aircraft cooling system evaporator arrangement has at least two mutually independent coolant circuits, at least two evaporation devices arranged to be hydraulically parallel for enabling an exchange of heat between the coolant and a refrigerant, at least two supply lines for supplying refrigerant to the evaporation devices, and at least two discharge lines for discharging refrigerant from the evaporation devices. A different one of the evaporation devices, a different one of the supply lines and a different one of the discharge lines are assigned to each of the coolant circuits, and the supply lines are hydraulically separate from each other as are the discharge lines. At least one refrigerant sensor monitors a refrigerant state of each of the discharge lines and an expansion valve is driven in accordance with the refrigerant sensors to control streams of refrigerant through the supply lines.
    Type: Grant
    Filed: September 1, 2008
    Date of Patent: November 19, 2013
    Assignee: Airbus Operations GmbH
    Inventors: Wolfgang Ebigt, Wilson Willy Casas Noriega
  • Patent number: 8555642
    Abstract: A method of utilizing waste heat to create a pressurized working fluid is disclosed. The method includes providing a vessel containing a sorbent system, introducing a feed of waste heat to a heat exchanger external to the vessel to heat a feed of working fluid, introducing the heated working fluid from the heat exchanger to the vessel to obtain pressurized working fluid, and directing the pressurized working fluid from the vessel to a work component. The method is particularly suited to make use of waste heat an industrial process, (e.g., a chemical processing or petrochemical refining operation) in which low grade heat source(s) are used to drive the sorption system.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: October 15, 2013
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Bhupender S. Minhas, Sufang Zhao, Mohsen S. Yeganeh, Tahmid I. Mizan
  • Patent number: 8549868
    Abstract: A refrigeration cycle apparatus (50) includes: a main refrigerant circuit (21) having a compressor (1), a radiator (2), a first expansion mechanism (5), a second expansion mechanism (6), and an evaporator (4); an injection passage (22) for supplying an intermediate-pressure refrigerant to an injection port 1c of the compressor 1; and a water circuit (30) through which water to be heated in the radiator (2) flows. The refrigeration cycle apparatus (50) includes a sub heat exchanger (3) for cooling the water in the water circuit (30) by exchanging heat between the refrigerant in the injection passage (22) and the water to be heated in the radiator (2).
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: October 8, 2013
    Assignee: Panasonic Corporation
    Inventors: Kou Komori, Yuichi Yakumaru, Tomoichiro Tamura, Masaya Honma, Hiroki Hayashi
  • Patent number: 8528359
    Abstract: A refrigerant vapor compression system includes a compression device, a heat rejecting heat exchanger, an economizer heat exchanger, an expander and an evaporator disposed in a refrigerant circuit. An evaporator bypass line is provided for passing a portion of the refrigerant flow from the main refrigerant circuit after having traversed a first pass of the economizer heat exchanger through the expander to partially expand it to an intermediate pressure and thence through a second pass of the economizer heat exchanger and into an intermediate pressure stage of the compression device. An economizer bypass line is also provided for passing a portion of the refrigerant from the main refrigerant circuit after having traversed the heat rejecting heat exchanger through a restrictor type expansion device and thence into the evaporator bypass line as liquid refrigerant or a mix of liquid and vapor refrigerant for injection into an intermediate pressure stage of the compression device.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: September 10, 2013
    Assignee: Carrier Corporation
    Inventors: Alexander Lifson, Michael F. Taras
  • Patent number: 8528348
    Abstract: An aircraft cooling system for cooling heat loads on board an aircraft includes a cold producing device, a first cold carrier fluid circuit thermally coupled to the cold producing device and connected to a first heat load in order to carry off heat from the first heat load, a second cold carrier fluid circuit connected to a second heat load in order to carry off heat from the second heat load, a heat exchanger disposed in the second cold carrier fluid circuit and configured to thermally couple the second cold carrier fluid circuit to an ambient temperature surrounding the aircraft, and a coupling system configured to selectively thermally couple the first cold carrier fluid circuit to the second cold carrier fluid circuit or thermally uncouple it from the second cold carrier fluid circuit.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: September 10, 2013
    Assignee: Airbus Deutschland GmbH
    Inventors: Wolfgang Ebigt, Wilson Willy Casas Noriega, Andreas Frey, Dirk Kastell
  • Patent number: 8522564
    Abstract: A temperature control system includes a compressor, a condenser, an evaporator, a receiver, and an accumulator. A valve is positioned between the evaporator and the receiver. An evacuation line has a first end in fluid communication with heat transfer fluid between the valve and the receiver, and a second end in fluid communication with the accumulator. The evacuation line provides for flow of the heat transfer fluid from both of the first heat exchanger and the receiver to the accumulator during an evacuation mode of operation of the temperature control system. The valve can take the form of a check valve or an expansion valve without a bleed port.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: September 3, 2013
    Assignee: Thermo King Corporation
    Inventors: Srinivasa Rao Koppineedi, Vladimir Sulc, William L. Waldschmidt, Joe A. Wermager
  • Patent number: 8516838
    Abstract: An improved refrigeration system may include a first refrigeration loop or one to multiple units of split chillers providing cooling for HVAC, dehumidification, medium temperature load cases and further condensing the refrigerant utilizing a heat exchanger for the cascadable low temperature units. The system may be scalable and the distributive design utilizes chillers to replace the traditional rack system. The first refrigeration loop may incorporate an integral or remote pump(s) which provides coolant through conduits to the medium temperature cases, HVAC and low temperature heat exchangers. The system may further include a combined direct expansion condenser and free cooler system incorporating a partial, pre-chiller through the combination direct expansion, water, fluid (secondary) coolant condenser. This may allow for the water or fluids systems to be cooled by the ambient temperature and fans reducing the compressor run time or even allowing the compressors to turn off.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: August 27, 2013
    Inventor: Anthony Papagna