Dividing Refrigerant Flow, E.g., Bypass Parallel Units Patents (Class 62/117)
  • Patent number: 10814700
    Abstract: A vehicle thermal management system including an electric powertrain, a single thermal loop, and a controller is provided. The electric powertrain includes a high voltage battery. The single thermal loop is for managing thermal conditions of the high voltage battery and a vehicle cabin and may include a climate control system, a blower, and a front evaporator in fluid communication with the vehicle cabin. The controller is programmed to, responsive to detection of a climate control system off request, output a command to direct the blower to push air through a heater core to the vehicle cabin at a predetermined temperature such that a temperature within the vehicle cabin is maintained at a predetermined temperature and refrigerant continues to flow through the front evaporator. The system may include a vehicle cabin temperature sensor and an ambient temperature sensor, each in electrical communication with the controller.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: October 27, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Alan Gutowski, Curtis Mark Jones, William Stewart Johnston, Manfred Koberstein
  • Patent number: 10816251
    Abstract: An exemplary heat pump includes: a compressor configured to compress a refrigerant; a first heat exchanger configured to condense the compressed refrigerant; a flow rate adjustment valve configured to adjust a flow rate of the condensed refrigerant; an expansion valve having an adjustable opening and configured to decompress the refrigerant having passed the flow rate adjustment valve; a second heat exchanger configured to cool a temperature control target by using the refrigerant decompressed by the expansion valve; and a control device configured to control the opening of the expansion valve based on a difference between the temperature of the refrigerant flowing into the second heat exchanger and the temperature of the refrigerant flowing out from the second heat exchanger, and to control the opening of the flow rate adjustment valve based on the flow rate of the refrigerant to be supplied to the second heat exchanger.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: October 27, 2020
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Norihiro Okuda, Hirotoshi Kihara, Keisuke Ota, Terunori Aikawa
  • Patent number: 10788203
    Abstract: An Organic Rankine Cycle (ORC) device and method for transforming waste heat from a heat source containing compressed gas into mechanical energy. The ORC includes a closed circuit containing a two-phase working fluid, the circuit including a liquid pump for circulating the working fluid in the circuit consecutively through an evaporator which is in thermal contact with the heat source; through an expander like a turbine for transforming the thermal energy of the working fluid into mechanical energy; and through a condenser which is in thermal contact with a cooling element. The ORC determines the mechanical energy generated by the expander. A control device regulates the fraction of the working fluid entering the expander based on the determined mechanical energy such that the mechanical energy generated by the expander is maximum.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: September 29, 2020
    Assignee: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
    Inventor: Henrik Ohman
  • Patent number: 10785996
    Abstract: A gas injection system for injecting a gas into a liquid to form a solution includes a flow channel that conveys a liquid from an upstream inlet configured to receive the liquid and a downstream outlet configured to dispense the solution, sparger positioned in the flow channel, a solution pressure detection device configured to sense a pressure of the solution in the flow channel, and a liquid valve configured to regulate flow of the liquid in the flow channel based on the pressure sensed by the solution pressure detection device. The sparger is configured to inject the gas into the liquid through the porous surface as the liquid flows across the surface.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: September 29, 2020
    Assignee: Cornelius, Inc.
    Inventors: Nicholas Giardino, Jacob Lukjanowicz, José Renteriá
  • Patent number: 10742085
    Abstract: The rotor of the rotating electric machine includes the rotor shaft and the rotor core. The rotor shaft has the shaft refrigerant passage and the refrigerant supplying port on the outer peripheral surface of the rotor shaft, the shaft refrigerant passage extending in an axial direction, the refrigerant supplying port communicating with the shaft refrigerant passage. The rotor core has the rotor core refrigerant passage and the refrigerant receiving port on the inner peripheral surface of the rotor core, the rotor core refrigerant passage extending in the axial direction, the refrigerant receiving port communicating with the rotor core refrigerant passage and facing the refrigerant supplying port of the rotor shaft. A clearance groove part is provided at a portion that is on the inner peripheral surface of the rotor core and that faces the refrigerant supplying port of the rotor shaft, the clearance groove part extending in the axial direction.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: August 11, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Ken Noda, Shinya Sano, Hiroyuki Hattori, Masayuki Ikemoto
  • Patent number: 10718547
    Abstract: An air-conditioning apparatus according to the present invention includes: a heat-source-side unit including a heat-source-side heat exchanger and a compressor; a plurality of load-side units including respective load-side heat exchangers and respective load-side expansion devices; and a relay unit connected between the heat-source-side unit and the plurality of load-side units by a first gas pipe and a first liquid pipe. The relay unit includes a gas/liquid separator which separates refrigerant supplied from the heat-source-side unit into gas refrigerant and liquid refrigerant, a gas-refrigerant supply pipe and a liquid-refrigerant supply pipe which are connected to the gas/liquid separator and each of the plurality of load-side units, a drain pan which is provided in a housing of the relay unit and which receives dew-condensation water, and a heat transfer body which is provided in the drain pan and which is in contact with the liquid-refrigerant supply pipe.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: July 21, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yohei Baba
  • Patent number: 10571158
    Abstract: Embodiments of the present invention relate to a refrigeration method, during which a user is supplied with frigories by means of a working gas, such as helium, that is cooled by having the same flow into a cold box that comprises, in series, at least one first aluminum heat exchanger having brazed plates and flanges, one second heat exchanger having welded plates, and one third aluminum heat exchanger having brazed plates and flanges in such a way that the flow of said working gas is at least partially caused to pass, consecutively, through the first exchanger, then through the second exchanger, and finally through the third exchanger before said working gas flow is directed to the user in order to supply the user with frigories.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: February 25, 2020
    Assignee: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Frederic Bonne, Mustapha Tebbani, Alain Briglia, Oriane De La Forterie
  • Patent number: 10527333
    Abstract: An air conditioner and a method for controlling an air conditioner are provided. The air conditioner may include an EHP outdoor device configured to drive a first compressor using electric power, and having a first heat exchanger that evaporates or condenses a refrigerant; a GHP outdoor device having an engine configured to drive a second compressor using a burned gas and a second heat exchanger that evaporates or condenses the refrigerant; and a flow rate balancing device configured to connect the first heat exchanger with the second heat exchanger, and to control a flow rate of the refrigerant through the EHP outdoor device and the GHP outdoor device.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: January 7, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Hojong Jeong, Kwangho Shin, Minho Chung, Song Choi
  • Patent number: 10520232
    Abstract: A packaged, pumped liquid, recirculating refrigeration system with charges of 10 lbs or less of refrigerant per ton of refrigeration capacity. The compressor and related components are situated in a pre-packaged modular machine room, and in which the condenser is mounted on the machine room and the evaporator is close coupled to the pre-packaged modular machine room. Prior art large receiver vessels may be replaced with a single or dual phase cyclonic separator also housed in the pre-packaged modular machine room.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: December 31, 2019
    Assignee: Evapco, Inc.
    Inventors: Kurt Liebendorfer, Gregory S. Derosier, Trevor Hegg
  • Patent number: 10480834
    Abstract: Apparatuses, systems, and methods are disclosed to prime a refrigerant pump by decoupling the condenser from the refrigerant pump and the refrigerant pump line or shielding from a condenser operation prior to startup of the system, so that liquid refrigerant can be appropriately sourced from the condenser and/or the evaporator using flow control device(s) such as a source valve on a source line of the condenser and/or on a source line of the evaporator and the control of such valve(s).
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: November 19, 2019
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Daoud A. Jandal, Brian Thomas Sullivan, Reginald Loyd Berry, Dennis Lee Justin, Matthew Aron Witt, Damion Scott Plymesser
  • Patent number: 10473374
    Abstract: Provided is a refrigeration apparatus in which a decrease in a temperature of an indoor heat exchanger can be suppressed as much as possible while depletion of refrigerator oil in a compressor is also suppressed. An air-conditioning apparatus configured from a parallel connection of a plurality of outdoor units to an indoor unit, wherein when a predetermined defrosting condition has been fulfilled, a controller includes at least one processor programmed to selectively execute a reverse-cycle defrost mode when a predetermined outflow condition pertaining to an outflow integrated quantity of refrigerator oil has also been fulfilled, and selectively execute an alternating defrost mode, in which the outdoor unit that is to be defrosted is changed in sequence, when the predetermined outflow condition has not been fulfilled.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 12, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Ryuuta Ohura, Junya Minami
  • Patent number: 10393418
    Abstract: An air-conditioning apparatus includes an outdoor unit, indoor units, and a relay unit, and forms a refrigerant circuit. The air-conditioning apparatus further includes a fourth flow control device that regulates the flow rate of refrigerant flowing into the heat source unit-side heat exchanger, a switching valve that regulates the flow rate of the refrigerant passing through a bypass pipe, and a control unit that controls the first heat-source-unit flow control device and the switching valve based on a pressure on a refrigerant inlet side of the heat source unit-side heat exchanger, an inlet temperature and an outlet temperature of a medium passing through the heat source unit-side heat exchanger, and the ratio of a cooling operation capacity to a heating operation capacity of the use-side heat exchangers.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: August 27, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hirofumi Koge, Koji Azuma
  • Patent number: 10335906
    Abstract: System and methods are provided and include a compressor operable in a refrigeration circuit, a first sensor detecting high-side data indicative of a high-side operating condition of a high-pressure side of the refrigeration circuit, a second sensor detecting low-side data indicative of a low-side operating condition of a low-pressure side of the refrigeration circuit, and processing circuitry. The processing circuitry receives the high-side data and the low-side data, determines a high-side fault, a low-side fault, a severe high-side fault, or a severe low-side fault based on the high-side data and the low-side data, operates the compressor in a limp-along mode by restricting power to the compressor or reducing a capacity of the compressor in response to determining at least one of the high-side fault and the low-side fault, and shuts down the compressor in response to determining at least one of the severe high-side fault and the severe low-side fault.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: July 2, 2019
    Assignee: Emerson Climate Technologies, Inc.
    Inventor: Hung M. Pham
  • Patent number: 10330351
    Abstract: A refrigerator includes a first compressor configured to compress first refrigerant, a first condenser configured to condense the compressed first refrigerant, a first expansion valve configured to reduce a temperature and a pressure of the condensed first refrigerant, a first evaporator configured to evaporate the first refrigerant having passed through the first expansion valve, a second compressor configured to compress second refrigerant, a second condenser configured to condense the compressed second refrigerant, a second expansion valve configured to reduce a temperature and a pressure of the condensed second refrigerant, a second evaporator configured to evaporate the second refrigerant having passed through the second expansion valve, a first heat exchanger arranged after and connected to the first expansion valve, and a second heat exchanger arranged after and connected to the second expansion valve.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: June 25, 2019
    Assignee: LG Electronics Inc.
    Inventors: Kyeongyun Kim, Sunam Chae, Kyungseok Kim
  • Patent number: 10330361
    Abstract: A passive liquid collecting device includes a reservoir including a reservoir exit line and at least one rigid structure disposed within the reservoir configured to collect a liquid and direct the liquid to the reservoir exit line. A first porous capillary media is supported by the at least one rigid structure and a vapor-liquid separator in contact with at least one of the at least one rigid structure and the first porous capillary media. The vapor-liquid separator includes a guide member extending along a guide member axis having a guide inlet and a guide outlet connected by a spiral conduit. A second porous capillary media is located radially outward from the spiral conduit on an exterior surface of the guide member. A thermal control loop is also disclosed.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: June 25, 2019
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Wei-Lin Cho
  • Patent number: 10330331
    Abstract: An independent temperature and humidity processing air conditioning system driven by low-level thermal energy, comprising an absorption-type refrigeration circulation loop, a solution dehumidification and regeneration circulation loop, a water cooling circulation loop, and a central air conditioning air supply and air return pipeline; the absorption-type refrigeration circulation loop comprises an evaporator (21), an absorber (26), a generator pump (25), a second solution heat exchanger (27), a generator (1), a condenser (2), a water-water heat exchanger (3), and a throttle valve (20); the solution dehumidification and regeneration circulation loop comprises a regenerator (8), a first solution pump (9), a solution heater (10), a first solution heat exchanger (12), a second solution pump (16), a solution cooler (17), and a dehumidifier (18); the water cooling circulation loop comprises two branches; and the central air conditioning air supply and a return pipeline comprises an air supply pipeline (13), an air
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: June 25, 2019
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Yonggao Yin, Yaming Dong, Xiaosong Zhang
  • Patent number: 10254018
    Abstract: The present invention relates to an apparatus and to a method for carrying out a vapour refrigeration process. The apparatus has a motor-operated main compressor which is equipped to suck-in a mass flow of a fluid serving as a refrigerant which is at evaporating pressure level and to compress this mass flow to a high pressure level, and also a high-pressure heat exchanger which is equipped to cool the mass flow of the fluid at a high pressure level, to increase a density and to reduce a temperature of the fluid. Also provided is an expander which is equipped to expand the mass flow of the fluid coming from the high pressure heat exchanger to evaporating pressure level in work-performing manner, and an evaporator which is equipped to absorb heat such that the density of the fluid decreases as it passes through the evaporator and the temperature of the mass flow coming from the expander at evaporating pressure and the temperature of the fluid being fed through the evaporator increase.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: April 9, 2019
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventor: Joerg Nickl
  • Patent number: 10240837
    Abstract: An outdoor unit includes at least a compressor, a gas-liquid separator, and an outdoor heat exchanger of a refrigerant circuit, the refrigerant circuit being formed by connecting, by pipes, the compressor, a condenser, a pressure reducing device, the gas-liquid separator, and the outdoor heat exchanger that acts as an evaporator including at least a plurality of heat transfer tubes and an inlet header that distributes incoming refrigerant to the heat transfer tubes. The outdoor unit further includes a gas-liquid-separator bypass pipe, a gas-liquid-separator-side flow control valve, a header bypass pipe, a header-side flow control valve, and a determination device.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: March 26, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoji Onaka, Takashi Matsumoto, Mizuo Sakai, Hiroki Murakami, Hiroaki Nakamune
  • Patent number: 10234182
    Abstract: Provided are a flash tank and an air conditioner having the same. The flash tank includes a flash tank liquid inlet (11) and a flash tank liquid outlet (12). The flash tank further includes: a plurality of flash chambers, wherein the flash chambers are arranged in sequence, every two adjacent flash chambers communicating; and a plurality of air replenishment openings (14), the air replenishment openings (14) and the flash chambers corresponding one to one and communicating with each other. The flash tank liquid inlet (11) communicates with the first flash chamber of the flash chambers, and the flash tank liquid outlet (12) communicates with the last flash chamber of the flash chambers. The flash tank may meet an air replenishment demand of a multi-stage compressor.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: March 19, 2019
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Tang Zhou, Yu Zhou, Chenguang Wang, Juan Wang, Xianquan Liu, Cui Pan, Liang Wan, Chengzhao Jin
  • Patent number: 10215450
    Abstract: The invention relates to heating, ventilation and/or air-conditioning equipment (1) including a device (9) for controlling the temperature of a battery (7) of an automobile including at least a compressor (11), a condenser (13), a first expansion member (15), a thermal-conditioning exchanger (17) for exchanging heat between a coolant and a heat-transport fluid (FC), and switching means. The temperature control device (9) includes at least one bypass line (9b) connecting an outlet of the compressor (11) to an inlet of the thermal-conditioning exchanger (17) while bypassing the condenser (13). The invention also relates to a method for controlling the temperature of an automobile battery (7) implemented by means of such heating, ventilation and/or air-conditioning equipment (1).
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: February 26, 2019
    Assignee: VALEO SYSTEMES THERMIQUES
    Inventors: Pascal Guigou, Mohamed Yahia
  • Patent number: 10203140
    Abstract: A refrigeration system is provided, such as for use with chillers. The system uses a tube-side condenser, such as a microchannel condenser, along with a shell-side evaporator such as a falling film evaporator. A flash tank economizer is disposed between the condenser and the evaporator, and an inlet valve to the flash tank is controlled based upon subcooling of condensate from the condenser. The vapor exiting the flash tank may be fed via an economizer line to a system compressor. Liquid phase refrigerant combined with some gas phase refrigerant exits the flash tank and is directed through an orifice before entering the evaporator.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: February 12, 2019
    Assignee: Johnson Controls Technology Company
    Inventors: William L. Kopko, Israel Federman, Satheesh Kulankara, Andrew John Graybill
  • Patent number: 10203155
    Abstract: The present invention relates to a process and device for condensing a first fluid rich in carbon dioxide using a second fluid.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: February 12, 2019
    Assignee: L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Michel Lestrade, Fabrice Rivoal
  • Patent number: 10184705
    Abstract: An actuation method of a refrigerating machine (10) provided with an economizer apparatus (16) and including an auxiliary laminating member (18) having the opening adjustable for modulating a tapping flow rate of refrigerating fluid flowing through the economizer apparatus (16) including a checking phase of the value of the condensing temperature (Tc) compared to a first threshold value (Tc-max); a first adjustment phase of the opening of the auxiliary laminating member (18) in order to keep the temperature of said tapping flow rate at the entrance of the compressor (15) of the refrigerating machine (10) substantially equal to a predetermined overheating value, if the condensing temperature (Tc) is lower than the first threshold value (Tc-max); a second adjustment phase of the opening of the auxiliary laminating member (18) depending on the value of the condensing temperature (Tc).
    Type: Grant
    Filed: October 18, 2014
    Date of Patent: January 22, 2019
    Assignee: CAREL INDUSTRIES S.P.A.
    Inventor: Giuseppe Dal Pra′
  • Patent number: 10166838
    Abstract: When a refrigerant evaporation temperature of an interior evaporator cannot be set lower than a dew-point temperature of air flowing into the interior evaporator in a heating operation, a refrigerant circuit is switched to a normal heating operation mode in which a flow rate of the refrigerant flowing into the interior evaporator is set to zero by allowing the refrigerant to flow toward a bypass passage. In a case where the air cannot be dehumidified by the interior evaporator, an unnecessary heat exchange between the air and the refrigerant in the interior evaporator can be suppressed. Thus, the energy of the vehicle air conditioner can be effectively prevented from being wasted.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: January 1, 2019
    Assignee: DENSO CORPORATION
    Inventor: Atsushi Inaba
  • Patent number: 9951975
    Abstract: A carbon dioxide refrigerant vapor compression system and method of operating that system are provided. The refrigerant vapor compression system includes a compression device, a flash tank receiver disposed in the refrigerant circuit intermediate a refrigerant heat rejection heat exchanger and a refrigerant heat absorption heat exchanger, and a compressor unload circuit including a refrigerant line establishing refrigerant flow communication between an intermediate pressure stage of the compression device and the refrigerant circuit at a location downstream of the refrigerant heat absorption heat exchanger and upstream of a suction inlet to the compression device, and a unload circuit flow control device disposed in said unload circuit refrigerant line. In response to at least one system operating parameter sensed by at least one sensor, the controller selectively positions the unload flow control device to maintain the refrigerant vapor compression system operating below a preselected high pressure limit.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: April 24, 2018
    Assignee: CARRIER CORPORATION
    Inventors: Yu H. Chen, Suresh Duraisamy, Lucy Yi Liu, Jason Scarcella, Zvonko Asprovski, Kursten Lamendola, Biswajit Mitra
  • Patent number: 9945606
    Abstract: Methods and apparatus for cryogenic distillation of air. In a system of air separation columns, all the air is taken to a high pressure which is 5 to 10 bar greater than a medium pressure. A portion of air, between 10% and 50% of the high pressure air stream, is boosted in a cold booster. This boosted air is then sent to an exchanger and a portion of it liquefies at the cold end of the exchanger. Part of the air is sent to one column of the column system, and another fraction is partly expanded in a Claude turbine. After expansion in the turbine, the air is sent to a medium pressure column, and a liquid stream is withdrawn for one of the columns of the system. The withdrawn stream is pressurized and vaporizes in the exchange line. The cold booster is coupled to either an expansion turbine, an electric motor, or a combination of the two.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: April 17, 2018
    Assignee: L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
    Inventors: Patrick Le Bot, Olivier De Cayeux, Frédéric Judas
  • Patent number: 9943014
    Abstract: Some modular heat-transfer systems can have an array of at least one heat-transfer element being configured to transfer heat to a working fluid from a heat dissipator. A manifolded heat exchanger can be configured to receive heated working fluid from a plurality of heat-transfer elements and to reject heat to a working fluid of a second fluid circuit. In some embodiments, the heat exchanging manifold can split an incoming flow of working fluid from the second fluid circuit into two or more streams having different bulk flow directions. In some instances, heat exchanger portions of the heat exchanging manifold are configured to provide counter flow heat exchange between the working fluid of the first fluid circuit and the working fluid of the second fluid circuit.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: April 10, 2018
    Assignee: CoolIT Systems, Inc.
    Inventors: Geoff Sean Lyon, Mike Holden, Brydon Gierl
  • Patent number: 9924614
    Abstract: A coolant supply unit includes a plurality of pumps, a casing that includes a coolant inlet port, a plurality of branch ports that respectively convey coolant to the plurality of pumps, a plurality of flow merging ports through which the coolant from the plurality of pumps merges, and a coolant outlet port; and a separating wall that is provided inside the casing and that separates the inside of the casing into a distribution chamber that is in communication with the inlet port and the branch ports, and a flow merging chamber that is in communication with the flow merging ports and the outlet port.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: March 20, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Masumi Suzuki, Michimasa Aoki, Jie Wei
  • Patent number: 9828536
    Abstract: Disclosed herein is a method for producing heating comprising condensing a vapor working fluid comprising (a) E-CF3CH?CHF and (b) at least one tetrafluoroethane of the formula C2H2F4. Also disclosed herein is a heat pump apparatus containing a working fluid comprising (a) E-CF3CH?CHF and (b) at least one tetrafluoroethane of the formula C2H2F4. Also disclosed herein is a method for raising the maximum feasible condenser operating temperature in a heat pump apparatus suitable for use with HFC-134a, comprising charging the heat pump with a working fluid comprising (a) E-CF3CH?CHF and (b) at least one tetrafluoroethane of the formula C2H2F4. Also disclosed herein is a method for replacing HFC-134a refrigerant in a heat pump designed for HFC-134a comprising providing a replacement working fluid comprising (a) E-CF3CH?CHF and (b) at least one tetrafluoroethane of the formula C2H2F4.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: November 28, 2017
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventor: Konstantinos Kontomaris
  • Patent number: 9816733
    Abstract: Embodiments provided herein are directed to systems and methods of re-injecting vaporized flash refrigerant from an economizer into a two-stage compressor. The injection can be through an injection port positioned after the first compression stage. The location of the injection may have a relatively low static refrigerant pressure. The injection port and/or an injection pipe of the economizer may be configured to pre-condition the vaporized flash refrigerant so that a flow velocity and/or direction of the vaporized flash refrigerant flow can be match a flow velocity and/or direction of the refrigerant in the refrigerant conduit.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: November 14, 2017
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Paul Francis Haley, Rick Todd James
  • Patent number: 9797639
    Abstract: A vapor compression system comprises a compressor, a condenser, an expansion device, e.g. in the form of an expansions valve, and an evaporator arranged along a refrigerant path. A method for operating the vapor compression system comprises the steps of: obtaining a superheat value being representative for the superheat of refrigerant entering the compressor; obtaining a subcooling value being representative for the subcooling of refrigerant entering the expansion device; and operating the expansion device on the basis of the obtained superheat value and on the basis of the obtained subcooling value. The subcooling value is taken into account when operating the expansion device, because variations in the subcooling value have significant influence on the refrigerating capacity of the evaporator at a given opening degree of the expansion device, thereby resulting in a more stable operation of the system. The system may further comprise an internal heat exchanger.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: October 24, 2017
    Assignee: Danfoss A/S
    Inventor: Frede Schmidt
  • Patent number: 9719699
    Abstract: An air conditioner (1A) as a refrigeration apparatus includes: a refrigerant circuit (2) including an evaporator (25), a first compressor (21), a vapor cooler (3), a second compressor (22), and a condenser (23) that are connected in this order; a heat release circuit (4) that allows a heat medium to circulate between the condenser (23) and a first heat exchanger (5) that releases heat to the atmosphere; and a heat absorption circuit (6) that allows a heat medium to circulate between the evaporator (25) and a second heat exchanger (7). The vapor cooler (3) is a heat exchanger that exchanges heat between a refrigerant vapor compressed by the first compressor (21) and the heat medium flowing in the heat release circuit (4) or the heat medium flowing in the heat absorption circuit (6).
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: August 1, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tomoichiro Tamura, Kou Komori, Bunki Kawano, Hidetoshi Taguchi
  • Patent number: 9689589
    Abstract: A refrigeration apparatus includes a refrigerant circuit connecting heat-source units in parallel with usage units. First and second heat-source units have first and second compressors, first and second heat-source-side heat exchangers, first and second high-pressure receivers, first and second detecting elements detecting whether the receivers are near flooding, first and second bypass channels returning refrigerant in top parts of the receivers to intake sides of the compressors, and first and second motor-operated valves on the bypass channels, respectively. A controller performs excess refrigerant distribution control in which an opening degree of the first valve is controlled to be greater than an opening degree of the second valve when the second detecting element detects a nearly flooded state, and the opening degree of the second valve is controlled to be greater than the opening degree of the first valve when the first detecting element detects a nearly flooded state.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: June 27, 2017
    Assignee: Daikin Industries, Ltd.
    Inventors: Junya Minami, Masahiro Oka, Mari Susaki
  • Patent number: 9683767
    Abstract: A cooling system and a control method thereof are provided. The cooling system may include a first compressor, a second compressor disposed downstream of the first compressor, an outdoor heat exchanger the performs heat exchange between refrigerant compressed in the first and/or second compressor and external air, an expansion device that decompresses the refrigerant condensed in the outdoor heat exchanger, a cooling evaporator evaporating the refrigerant decompressed in the expansion device, a bypass tube that guides refrigerant compressed in the first compressor to the outdoor heat exchanger, bypassing the second compressor, and a valve device controlling the flow of refrigerant discharged from the first compressor so as to selectively introduce refrigerant into the second compressor.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: June 20, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Jaeheuk Choi, Taehee Kwak, Yoonho Yoo, Doyong Ha
  • Patent number: 9677779
    Abstract: A modular heating and cooling unit comprising an independent set of headers for each of the heating and cooling loads and the source. A bank of these modular units provides a system that is capable of incremental simultaneous heating and cooling and redundancy. Valves in the internal piping of the unit eliminate the need for valves in the headers between units. This substantially reduces the overall footprint of the unit. Because of the parallel flow between the heat exchangers and the heating and cooling load, the modules can be operated in cooling mode and heating mode in any order.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: June 13, 2017
    Assignee: CLIMACOOL CORP.
    Inventor: Ross A. Miglio
  • Patent number: 9677778
    Abstract: A modular heating and cooling unit comprising an independent set of headers for each of the heating and cooling loads and the source. A bank of these modular units provides a system that is capable of incremental simultaneous heating and cooling and redundancy. Valves in the internal piping of the unit eliminate the need for valves in the headers between units. This substantially reduces the overall footprint of the unit. Because of the parallel flow between the heat exchangers and the heating and cooling load, the modules can be operated in cooling mode and heating mode in any order.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: June 13, 2017
    Assignee: CLIMACOOL CORP.
    Inventor: Ross A. Miglio
  • Patent number: 9657978
    Abstract: A refrigeration system is provided, such as for use with chillers. The system uses a tube-side condenser, such as a microchannel condenser, along with a shell-side evaporator such as a falling film evaporator. A flash tank economizer is disposed between the condenser and the evaporator, and an inlet valve to the flash tank is controlled based upon subcooling of condensate from the condenser. The vapor exiting the flash tank may be fed via an economizer line to a system compressor. Liquid phase refrigerant combined with some gas phase refrigerant exits the flash tank and is directed through an orifice before entering the evaporator.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: May 23, 2017
    Assignee: Johnson Controls Technology Company
    Inventors: William L. Kopko, Israel Federman, Satheesh Kulankara, Andrew John Graybill
  • Patent number: 9651281
    Abstract: An alternating type heat pump has first to third rows of outdoor unit coils adapted to selectively perform the functions of an evaporator and a condenser in accordance with the outdoor conditions and the load variations, thereby improving the performance of the heat pump, and is capable of allowing the first to third rows of outdoor unit coils to be operated as a condenser in an alternating manner under the conditions where frost on the outdoor unit coils may be formed especially in winter seasons, thereby basically preventing the conditions on which the frost is formed.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: May 16, 2017
    Inventor: Chang Duk Jeon
  • Patent number: 9643468
    Abstract: A regenerative air conditioning system for a vehicle includes a condenser, a compressor, an evaporator subsystem, an expansion valve, and a solenoid controlled expansion valve arranged and coupled together in a direct expansion cooling circuit. The evaporator subsystem has a main evaporator and a storage evaporator. The storage evaporator has a phase change material therein surrounding refrigerant passages in the storage evaporator. The storage evaporator in a charge state when the vehicle is decelerating wherein refrigerant flows through the storage evaporator to cool the phase change material to cause it to change phases to store thermal cooling potential. The storage evaporator in a discharge state when the vehicle is stopped and an engine of the vehicle is off to cool cabin cooling air flowing across the storage evaporator by the phase change material absorbing heat from the cabin cooling air flowing across the storage evaporator.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: May 9, 2017
    Assignee: FCA US LLC
    Inventor: Matthew Bartlett
  • Patent number: 9617719
    Abstract: Integrated air conditioning and water-harvesting systems are disclosed. In these systems, one subsystem (air conditioning or water-harvesting) may be a primary subsystem and the other subsystem may be a secondary subsystem. As load on the overall system increases to the point the cooling demands for both subsystems cannot be met simultaneously, the system automatically reduces output of the secondary subsystem. In certain embodiments, an atmospheric water-harvester may be connected into the (potentially pre-existing) chilled-water system that provides cooling throughout a building, either via distributed fan-coil units or a centralized air-handling unit. Additionally, providing cooled-air exhaust from an atmospheric water-harvester to a building's cooling system allows substantial quantities of water to be produced at nominal incremental operating cost over a simple, straightforward air conditioning system.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: April 11, 2017
    Assignee: Water Generating Systems I, LLC
    Inventors: George A Sawyer, Ryan Larson
  • Patent number: 9603285
    Abstract: A coolant supply unit includes a plurality of pumps, a casing that includes a coolant inlet port, a plurality of branch ports that respectively convey coolant to the plurality of pumps, a plurality of flow merging ports through which the coolant from the plurality of pumps merges, and a coolant outlet port; and a separating wall that is provided inside the casing and that separates the inside of the casing into a distribution chamber that is in communication with the inlet port and the branch ports, and a flow merging chamber that is in communication with the flow merging ports and the outlet port.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: March 21, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Masumi Suzuki, Michimasa Aoki, Jie Wei
  • Patent number: 9500395
    Abstract: A refrigeration circuit is disclosed circulating a refrigerant and comprising in the direction of flow of the refrigerant a compressor (2); at least one condenser (14, 16) for rejecting heat to ambient air; an expansion device (8); and an evaporator (10). The refrigeration circuit further comprises a collecting container (12), the output of which being connected to the expansion device (8); a heat rejecting heat exchanger (4) for heat exchange of the refrigerant to a heat pump system, the output of the heat rejecting heat exchanger (4) being connected to the collecting container (12); and means (V1, V2) for connecting the heat rejecting heat exchanger (4) or at least one of the condenser(s) (14, 16) to the output of the compressor (2) depending on the availability of cooling power at the heat rejecting heat exchanger (4).
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: November 22, 2016
    Assignee: CARRIER CORPORATION
    Inventors: Christian Scheumann, Sascha Hellmann
  • Patent number: 9494348
    Abstract: An air-conditioning apparatus controls an opening degree of at least one of a second expansion device and a third expansion device to adjust the amount of refrigerant to flow through the injection pipe.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: November 15, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Katsuhiro Ishimura, Koji Yamashita, Hiroyuki Morimoto, Shinichi Wakamoto, Naofumi Takenaka
  • Patent number: 9347694
    Abstract: An appliance employing a coolant system that includes a compressor having a housing, a cooling capacity, and operably connected to typically two evaporators for regulating a temperature of the first compartment and a temperature of the second compartment; a shared coolant fluid connection system; a coolant fluid spaced within the shared coolant fluid connection system; and a switching mechanism operably connected to a first fluid conduit that provides shared coolant fluid to the compressor at a first pressure level and a second fluid conduit that provides shared coolant fluid to the compressor at a second pressure level where the second pressure level is less than the first pressure level wherein the switching mechanism is capable of regulating and switching shared coolant flow to the compressor from the first fluid conduit and the second fluid conduit.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: May 24, 2016
    Assignee: Whirlpool Corporation
    Inventors: Guolian Wu, Andrew Litch, Alberto Gomes, Nihat Cur
  • Patent number: 9212751
    Abstract: A flow control valve includes a housing forming internal passages in fluid communication with a port of the valve, and an internal cavity. A flow direction block is disposed in the internal cavity and forms at least one flow passage extending through a portion thereof. The flow direction block is moveable within the internal cavity such that the free ends of the least one flow passage can be selectively aligned with a respective internal passage along an interface as the flow direction block is moved from a first, closed position to a second, open position. A seal is disposed around each interface and includes an internal face, which presses against an outer surface of the flow direction block, and an external face, which presses against the housing. Sealing function is improved, at least in part, by a differential fluid pressure that acts on the seal.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: December 15, 2015
    Assignee: Robertshaw Controls Company
    Inventors: Allan R. McLane, Jermaine Ealy
  • Patent number: 9162549
    Abstract: An evaporation cycle heat exchange system for a vehicle cools vehicle electronic components, a fuel cell stack, an internal combustion engine, an automatic transmission, a turbocharger, etc. using an evaporative heat exchanger, thus improving cooling efficiency and reducing the size of components such as a radiator. The evaporation cycle heat exchange system cools coolant circulating through a vehicle cooling system by employing an evaporative heat exchanger in which a working fluid flows by a pressure difference caused by volume expansion and capillary phenomenon. Accordingly, it is possible to improve the cooling efficiency of the entire cooling system, reduce the size of components to comply with pedestrian protection regulations, improve fuel efficiency, and ensure the stability of the system.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: October 20, 2015
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Jae Yeon Kim
  • Publication number: 20150135746
    Abstract: Provided is a pumped loop system (10) for cooling a heat-generating components without relying on a maximum heat load, the system including first and second evaporators (14a-14n) in parallel with one another and first and second valves (22a-22n) upstream of the first and second evaporators respectively, wherein the valves (22a-22n) are controllable to vary the flow rate of fluid to the respective evaporator (14a-14n) based on the amount of flow needed to control the respective heat-generating component. By cooling the heat-generating components without relying on the maximum heat load, adequate flow may be provided to an evaporator operating under a high heat low while reduced flow is provided to an evaporator operating under a low head load.
    Type: Application
    Filed: January 15, 2013
    Publication date: May 21, 2015
    Applicant: Parker-Hannifin Corporation
    Inventor: Timothy Douglas Louvar
  • Patent number: 8997503
    Abstract: A vehicle air-conditioning system includes an HVAC unit that blows air whose temperature is adjusted by a refrigerant evaporator and a second refrigerant condenser. The system includes a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section, a first refrigerant condenser, a first expansion valve, and the refrigerant evaporator are sequentially connected. The system includes a second expansion valve and a refrigerant heat exchanger connected in parallel with the first expansion valve and the refrigerant evaporator. The second refrigerant condenser is connected in parallel with the first refrigerant condenser. The system includes a coolant cycle in which a coolant circulating pump, a ventilation-exhaust-heat recovery unit, a motor/battery, an electric heater, and the refrigerant heat exchanger are sequentially connected, and the ventilation-exhaust-heat recovery unit, motor/battery, and electric heater can be selectively used as a heat source.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: April 7, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masatosi Morisita, Hideki Suetake, Toshihisa Kondo, Akira Katayama
  • Patent number: 8978412
    Abstract: Provided is a refrigerant cycle of an air conditioner for vehicles, and more particularly, a refrigerant cycle of an air conditioner for vehicles having a first evaporating unit and a second evaporating unit disposed upstream and downstream in a direction in which air blown from a single blower flows to control an amount of the refrigerant supplied to each evaporating unit, thereby making it possible to obtain optimal radiating performance (cooling performance) and cooling efficiency (COP) through the design of the optimal refrigerant flow ratio depending on the cooling load.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: March 17, 2015
    Assignee: Halla Visteon Climate Control Corporation
    Inventors: Yong Nam Ahn, Tae Young Park, Yong Jun Jee, Jae Won Jeong, Eun Gi Min, Hae Jun Lee
  • Publication number: 20150047378
    Abstract: A heat pump circuit including a compressor that compresses a working fluid from a gas in a low pressure, low temperature first state to a high pressure, a high temperature second state. A first subflow of the working fluid is condensed into a gaseous/liquid mixture and assumes a third state by the working fluid delivering heat to a first medium. The first subflow of the working fluid is expanded and returns to a gas in the first state by absorbing heat from a second medium, whereupon the working fluid completes the cycle again. A second subflow of the compressed working fluid is expanded from the second state and the energy contents in the second subflow converted into electrical energy, whereafter the expanded working fluid is returned to the compressor after passage of the evaporator, or after expansion in the energy converter from the second to the first state.
    Type: Application
    Filed: March 19, 2013
    Publication date: February 19, 2015
    Inventor: Hardy Hollingworth