Compressing, Condensing And Evaporating Patents (Class 62/115)
  • Patent number: 11390136
    Abstract: An air conditioning system, a vehicle and a method of controlling the vehicle with a vehicle air conditioning system are provided. The vehicle air conditioning system has a refrigeration circuit having a compressor, a condenser, and an evaporator in sequential fluid communication, with a valve assembly and a battery chiller positioned for parallel flow with the evaporator. A cooling circuit in the vehicle has a chiller. A controller is configured to, in response to a temperature of the evaporator being less than a first predetermined value and the compressor operating at a predetermined speed, open the valve assembly to divert a portion of refrigerant through the chiller and away from the evaporator. The refrigerant may be diverted, for example, to raise the temperature of the evaporator and/or prevent cycling of the compressor.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: July 19, 2022
    Assignee: Ford Global Technologies, LLC
    Inventors: Mary Bellino, Nicholas David Moore, Joseph George, Rohan Shrivastava
  • Patent number: 11390827
    Abstract: To provide a composition for a heat cycle system with which a HCFO or a CFO can more stably lubricate, and a heat cycle system employing the composition. A composition for a heat cycle system comprising a working fluid for heat cycle containing at least one compound selected from predetermined HCFO and CFO, and a mixed refrigeration oil obtained by mixing a naphthenic mineral oil and other predetermined refrigeration oil, wherein the mixed refrigeration oil has a kinematic viscosity at 40° C. of 300 mm2/s or lower, a mixed composition 1 of the working fluid for heat cycle and the mixed refrigeration oil at a concentration of the working fluid for heat cycle of 10 mass % has a viscosity at 60° C. of 10 mPa·s or higher, and a mixed composition 2 of the working fluid for a heat cycle system and the mixed refrigeration oil at a concentration of the mixed refrigeration oil of 5 mass % has a two phase separation temperature of 0° C.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: July 19, 2022
    Assignees: AGC Inc., Japan Sun Oil Company, Ltd.
    Inventors: Masato Fukushima, Rei Saito
  • Patent number: 11378287
    Abstract: A pipe unit allows refrigerant to divide or merge and includes: branch pipes; and a main pipe. The pipe unit is connected to a connection pipe, and the pipe unit and the connection pipe together form a liquid-side refrigerant channel between an outdoor unit and indoor units. The main pipe communicates with each of the branch pipes, forms a channel through which the refrigerant flows to or from each of the branch pipes, and is disposed, in an installed state, on an outdoor unit side of the branch pipes in the liquid-side refrigerant channel. The main pipe includes a first part that extends in a first direction, at least one of the branch pipes includes a second part that extends in a second direction intersecting the first direction, the first direction is horizontal in the installed state, and the second direction is vertical in the installed state.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: July 5, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tetsuya Shirasaki, Atsushi Yoshimi
  • Patent number: 11370293
    Abstract: An electric drive unit for a motor vehicle includes an electrical machine having a stator and a rotor. An inverter having a first switch unit energizes a first phase system (U, V, W) of the stator. A transmission is connected to the rotor for torque transmission. A lubricant circuit lubricates the transmission and/or cools the rotor. A first cooling circuit cools the first switch unit. A lubricant-coolant heat exchanger thermally couples the first coolant circuit and the lubricant circuit. A control device provides a dissipation-increasing operating mode for the first switch unit in order to increase a dissipation heating a coolant of the first coolant circuit. The lubricant-coolant heat exchanger transfers heat from the heated coolant to the lubricant circuit in order to reduce a viscosity of a lubricant.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: June 28, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Felix Merz, Yann Tremaudant
  • Patent number: 11365924
    Abstract: A control method and a control system for a compressor in a refrigeration system, implements control logic based on the monitoring of parameters of the refrigeration system, where these parameters may include, for example, a previous load (Cant), a current load (Catu), a reference load (Cref), a measured cycle time (tcycle) and a target time (ttarget).
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: June 21, 2022
    Assignee: EMBRACO INDÚSTRIA DE COMPRESSORES E SOLUÇÕES EM REFRIGERAÇÃO LTDA.
    Inventors: Daniel Hense, Lucas Becker, Marcio Roberto Thiessen
  • Patent number: 11353245
    Abstract: A cooling system is designed to operate in two different modes. Generally, in the first mode, when parallel compression is needed, certain valves are controlled to direct gaseous refrigerant from a tank to a compressor in the system and to direct refrigerant from low side heat exchangers towards other compressors. In this manner, a compressor in the system is transitioned to be generally a parallel compressor. In the second mode, when parallel compression is not needed, the valves are controlled to return the refrigerant flow back to normal.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: June 7, 2022
    Assignee: Heatcraft Refrigeration Products LLC
    Inventor: Douglas Cole
  • Patent number: 11346569
    Abstract: The present disclosure disclosures a method and an apparatus for controlling a device. The method is applied in an indoor unit of a multi-split system and includes: when a temperature sensor fails, selecting other indoor units operating in the same operation mode with a current indoor unit from all indoor units; obtaining corresponding sensor parameters from temperature sensors of the indoor units operating in the same operation mode; and controlling the device according to the obtained sensor parameters.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: May 31, 2022
    Assignee: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC CO., LTD.
    Inventors: Jun Wang, Shaojiang Cheng, Baitian Zhuo, Ruigang Zhang, Bin Shi
  • Patent number: 11326821
    Abstract: A refrigeration system includes an evaporator within which a refrigerant absorbs heat, a gas cooler/condenser within which the refrigerant rejects heat, a compressor operable to circulate the refrigerant between the evaporator and the gas cooler/condenser, a high pressure valve operable to control a pressure of the refrigerant at an outlet of the gas cooler/condenser, and a controller. The controller is configured to automatically generate a setpoint for a measured or calculated variable of the refrigeration system based on a measured temperature of the refrigerant at the outlet of the gas cooler/condenser. The setpoint is generated using a stored relationship between the measured temperature and a maximum estimated coefficient of performance (COP) that can be achieved at the measured temperature. The controller is configured to operate the high pressure valve to drive the measured or calculated variable toward the setpoint.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: May 10, 2022
    Assignee: Hill Phoenix, Inc.
    Inventors: Naresh Kumar Krishnamoorthy, Nassim Khaled
  • Patent number: 11320179
    Abstract: A fluid or gas cooling and/or condensing apparatus, system and method provides a cooling apparatus for cooling and condensing material, such as, for example, refrigerant from air conditioners, refrigerators, and other like mechanical cooling devices for collecting the same, and/or other gases and/or fluids, such as wine, for example.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: May 3, 2022
    Inventor: Randy Prohaska
  • Patent number: 11300308
    Abstract: A heating, ventilation, or air conditioning (HVAC) system includes a headless thermostat device and an adapter unit. The headless thermostat device includes one or more circuits configured to receive a control input from a user device via a local wireless network and generate a control signal for HVAC equipment based on the control input. The adapter unit includes one or more circuit configured to receive the control signal from the headless thermostat device via the local wireless network and provide the control signal to the HVAC equipment for operation of the HVAC equipment in accordance with the control input.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: April 12, 2022
    Assignee: Johnson Controls Tyco IP Holdings LLP
    Inventors: Theresa N. Gillette, Andrew Michael Boyd, Thomas D. Chase, Madhuka Manuranga Jayarathne
  • Patent number: 11299660
    Abstract: The present invention discloses a three-component mixed working fluid for an ICE waste heat recovery power cycle, wherein the three-component mixed working fluid consists of carbon dioxide, pentane and a refrigerant, the refrigerant is a high-performance environment-friendly refrigerant with GWP value which is lower than 1000 and ODP value which is 0, and the refrigerant is one selected from a group consisting of difluoromethane, fluoroethane and 1,1-difluoroethane; according to the selected refrigerants, the mass percentage of each component is as follow: the mass percentage of CO2, pentane and difluoromethane are 30-70, 10-20, and 10-60; the mass percentage of CO2, pentane and fluoroethane are 30-70/10-20/10-50; the mass percentage of CO2, pentane and 1,1-difluoroethane are 10-70/10-30/10-60.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: April 12, 2022
    Assignee: TIANJIN UNIVERSITY
    Inventors: Gequn Shu, Peng Liu, Hua Tian, Zhigang Yu
  • Patent number: 11293657
    Abstract: Disclosed are an air conditioning system and its pressure ratio control method and device. The method includes: acquiring an actual pressure ratio of the compressor every preset time period in operation of the air conditioning system; judging whether the actual pressure ratio is greater than or equal to the first pressure ratio corresponding to a current level; controlling the compressor to downshift one level for operation if the actual pressure ratio is greater than or equal to the first pressure ratio corresponding to the current level; further judging whether the actual pressure ratio is less than the second pressure ratio corresponding to the current level if the actual pressure ratio is less than the first pressure ratio corresponding to the current level; and controlling the compressor to upshift one level for operation if the actual pressure ratio is less than the second pressure ratio corresponding to the current level.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: April 5, 2022
    Assignees: GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.
    Inventors: Xihua Ma, Yongfeng Xu, Meibing Xiong, Linxing Ren
  • Patent number: 11287170
    Abstract: A control method for a refrigeration system (10), with the refrigeration system (10) including at least one compressor (1) associated with at least one pair of suction lines (L2, L3, . . . LN), with each of the suction lines (L2, L3, . . . LN) respectively associated with at least one refrigerated environment (C1, C2, . . . CN). The method includes generating a system equivalent (Seq) to the refrigeration system, with the equivalent system (Seq) comprising at least one control parameter (PC1, PC2, . . . PCN) associated with each of the refrigerated environments (C1, C2, . . . CN). A control system for a refrigeration system and a refrigeration appliance are also described.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: March 29, 2022
    Assignee: EMBRACO INDÚSTRIA DE COMPRESSORES E SOLUÇÕES EM REFRIGERAÇÃO LTDA.
    Inventors: Dietmar Erich Bernhard Lilie, Cristiano Candido Valerio
  • Patent number: 11274877
    Abstract: Disclosed is an oxygen-control freshness preservation refrigerator, comprising a cabinet with a refrigerating compartment and a freezing compartment. A partition plate for separating the refrigerating compartment from the freezing compartment is arranged in the cabinet. The refrigerator further has a freshness preservation compartment arranged inside the refrigerating compartment and an oxygen control device for reducing the oxygen content inside the freshness preservation compartment, the oxygen control device comprises a gas-regulating membrane assembly and a gas extraction assembly. The gas-regulating membrane assembly has at least one gas-regulating membrane for selective gas permeation.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: March 15, 2022
    Assignee: QINGDAO HAIER CO., LTD.
    Inventors: Lei Wang, Bo Jiang, Jianquan Chen, Chun Yang, Liyan Wang
  • Patent number: 11268718
    Abstract: Provided is a refrigeration apparatus that is capable of determining an increased possibility of ignition due to a refrigerant leak. An air conditioner (100) including a refrigerant circuit (10) includes a refrigerant gas sensor (81) and an oxygen gas sensor (82). The refrigerant circuit (10) has an R32 refrigerant charged therein, and performs a refrigeration cycle. The refrigerant gas sensor (81) detects a refrigerant gas in a room where at least a portion of the air conditioner (100) is located. The oxygen gas sensor (82) detects an oxygen gas in the room.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: March 8, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomoatsu Minamida, Tomoyuki Haikawa, Shigeharu Taira
  • Patent number: 11243016
    Abstract: A refrigeration system includes a subcooler configured to provide subcooling for a liquid refrigerant flowing through a first side of the subcooler by transferring heat from the liquid refrigerant to a gas refrigerant flowing through a second side of the subcooler. An expansion valve is located at an inlet of the second side of the subcooler and configured to control a flow of the gas refrigerant through the second side of the subcooler. A gas temperature sensor and a gas pressure sensor are configured to measure a temperature and pressure of the gas refrigerant. A liquid temperature sensor is configured to measure a temperature of the subcooled liquid refrigerant. A controller is configured to calculate a superheat of the gas refrigerant based on the measured temperature and measured pressure of the gas refrigerant and may compare the calculated superheat to a superheat threshold. If the calculated superheat is less than the superheat threshold, the controller may close the expansion valve.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: February 8, 2022
    Assignee: Hill Phoenix, Inc.
    Inventors: Nassim Khaled, Michael Hill
  • Patent number: 11186136
    Abstract: A cooling apparatus for a motor vehicle includes a coolant circuit through which a coolant can flow, a coolant compressor, a first evaporator, at least one second evaporator, a first suction line for leading the coolant from the first evaporator to the coolant compressor, a second suction line, a main line connected fluidically to suction lines at a connecting point, and at least one internal heat exchanger, through which coolant flowing from the at least one of the evaporators to the coolant compressor can flow. The internal heat exchanger is arranged in at least one of the suction lines and the connecting point is arranged downstream of the at least one heat exchanger.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: November 30, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Christian Allgaeuer, Oliver Horn, Martin Knott
  • Patent number: 11187449
    Abstract: Methods are directed towards dynamically determining refrigerant film thickness at the rolling-element bearing and for dynamically controlling refrigerant film thickness at the rolling-element bearing. Further, an oil free chiller system is configured for dynamically determining refrigerant film thickness at the rolling-element bearing of the oil free chiller system, wherein the oil free chiller system is also configured for dynamically controlling refrigerant film thickness at the rolling-element bearing of the oil free chiller system.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: November 30, 2021
    Assignee: TRANE INTERNATIONAL INC.
    Inventor: Jay H. Johnson
  • Patent number: 11168918
    Abstract: The control method and system for the variable-frequency compressor includes: acquiring an operation current and an operation frequency of the variable-frequency compressor; determining that the operation current is greater than or equal to a preset frequency-limited current, and reducing the operation frequency to a preset frequency-limited frequency so as to enable the variable-frequency compressor to enter a frequency-limited mode; detecting an operation current at the moment of the variable-frequency compressor every preset duration; determining that the operation current at the moment meets a preset up-conversion condition, and increasing an operation frequency at the moment of the variable-frequency compressor by a preset up-conversion frequency step size until the variable-frequency compressor retreating from the frequency-limited mode; and determining that the operation current at the moment does not meet the preset up-conversion condition, and controlling the variable-frequency compressor to maintain
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: November 9, 2021
    Assignees: HEFEI MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD.
    Inventors: Linxing Ren, Yongfeng Xu, Xihua Ma
  • Patent number: 11159104
    Abstract: An energy harvesting system is provided. The energy harvesting system includes a transport refrigeration unit (TRU), a remote wireless element operably disposed to respond to a characteristic of the TRU and an energy harvesting circuit. The remote wireless element includes a battery and a response element powered by the battery. The energy harvesting circuit is coupled to the battery and configured to generate electricity from TRU movements. The electricity generated from the TRU movements is provided to at least one of the remote wireless element to power operations of the remote wireless element and the battery to charge the battery.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: October 26, 2021
    Assignee: CARRIER CORPORATION
    Inventor: Cyril Menard
  • Patent number: 11137170
    Abstract: A heat pump system comprises: a main heat exchange circuit, comprising a two-stage compressor (100a,100b), a condenser (200), a throttle element (300a,300b) and an evaporator (400), which are connected in sequence to form a circuit; an economizer, disposed between the condenser and the evaporator; a gas supplement branch, connecting a gas outlet of the economizer to a gas supplement port of the compressor, with an economizer regulating valve (600) for controlling the opening and closing of a flow path being arranged on the gas supplement branch; and a control device, wherein the control device controls the opening and closing of the economizer regulating valve based on a refrigerant state feature in the evaporator during a start-up stage of the heat pump system.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: October 5, 2021
    Assignee: CARRIER CORPORATION
    Inventor: Runfu Shi
  • Patent number: 11118794
    Abstract: An air conditioner unit, as provided herein, may include a cabinet, an outdoor heat exchanger, an indoor heat exchanger, a compressor, a heater bank array, and a controller. The compressor may be in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The heater bank array may include a plurality of heater banks mounted within the indoor portion. The controller may be in operative communication with the compressor and the heater bank array. The controller may be configured to initiate a heating operation. The heating operation may include detecting objectionable heating unit performance of the heater bank array, reducing an electric power load of the heater bank array in response to detecting objectionable heating unit performance, and directing a modified heat cycle based on detecting objectionable heating unit performance.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: September 14, 2021
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Joshua Duane Longenecker, Robert T. Mills
  • Patent number: 11079139
    Abstract: Methods and systems for determining a possible leak within a gas water heater. One system is a gas water heater including a blower and an electronic processor. The electronic processor is configured to activate the blower for a predetermined amount of time, receive, during the predetermined amount of time, a measurement of a characteristic of the blower, perform a comparison between the measurement and a predetermined characteristic threshold, and determine, based on the comparison, that a blockage is present within the water heater. The electronic processor is further configured to output a notification in response to determining the blockage is present.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: August 3, 2021
    Assignee: A. O. SMITH CORPORATION
    Inventor: Brian Thomas Branecky
  • Patent number: 11079150
    Abstract: A method controls the level of liquid within an evaporator of a flooded-type chiller without level sensors. The flooded-type chiller includes at least one compressor, a condenser, an expansion valve and an evaporator. A number of sensors positioned in the system measures a number of first parameter information values. A controller calculates a number of second parameter information values based on the measured first parameter information values and further determines a virtual refrigerant level as a control signal based on the second parameter information values. Based on the determined virtual refrigerant level, the controller opens, closes or holds the expansion valve with respect to a dead zone for maintaining a pre-defined target refrigerant level so as to provide the desired refrigerant level and oil in the evaporator.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: August 3, 2021
    Assignee: BLUE STAR LIMITED
    Inventors: Sandeep Pasarkar, Zaid Hetavkar
  • Patent number: 11047375
    Abstract: A diaphragm-type compressor includes a substrate, an actuator, a diaphragm provided between the substrate and the actuator, and a case in which the diaphragm, the actuator, and the substrate are provided. A recessed section formed at the actuator side of the substrate and the actuator overlap in a plan view. The case has an inflow port of fluid further on the actuator side than the substrate based on the position of the diaphragm. The substrate includes a suction port for causing the recessed section to suck the fluid.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: June 29, 2021
    Inventors: Tsukasa Funasaka, Yuki Hanamura
  • Patent number: 11035599
    Abstract: An apparatus includes a flash tank that stores a refrigerant, a first load that uses the refrigerant to cool a first space, second and third loads, first and second compressors, and a valve. During a first mode of operation: the second load uses the refrigerant to cool a second space, the third load uses the refrigerant to cool a third space, the second compressor compresses the refrigerant from the second and third loads, and the first compressor compresses the refrigerant from the first load and the second compressor. During a second mode of operation: the second compressor compresses the refrigerant from the second load and directs the compressed refrigerant to the third load to defrost the third load and the valve prevents the refrigerant at the third load from flowing to the flash tank until a pressure of the refrigerant at the third load exceeds a threshold.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: June 15, 2021
    Assignee: Heatcraft Refrigeration Products LLC
    Inventors: Michael Hollister, Shitong Zha
  • Patent number: 11009240
    Abstract: An air conditioner may be provided. The air conditioner may include a housing disposed on a base, the housing may house an evaporator unit, a condenser unit, and a compressor unit. A first air inlet and a first air outlet may be located on a first end of the housing. The first air inlet, the first air outlet and the evaporator may be connected to each other to form an internal air circulation system. A second air inlet and a second air outlet may be located on a second end of the housing. The second air inlet, the second air outlet and the condenser unit may be connected to each other to form an external air circulation system. Airways of the internal air circulation system and the external air circulation system may be independent from each other.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: May 18, 2021
    Assignee: SHENZHEN KEKU TECHNOLOGY CO., LTD.
    Inventor: Zelei Ma
  • Patent number: 11007850
    Abstract: A heat pump system for a vehicle cools or warms a battery module by use of one chiller in which a coolant and a refrigerant exchange heat such that the system may be simplified, and heating efficiency may be improved by selectively using an external air heat source and waste heat of an electrical component in a heating mode of the vehicle.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 18, 2021
    Assignees: Hyundai Motor Gompany, Kia Motors Corporation, Hanon Systems
    Inventors: Jae Yeon Kim, SungJe Lee, Hae Jun Lee, In Guk Hwang
  • Patent number: 10996639
    Abstract: A controller for controlling a system with continuous and discrete elements of operation accepts measurements of a current state of the system, solves a mixed-integer model predictive control (MI-MPC) problem subject to state constraints on the state of the system to produce control inputs to the system, and submits the control inputs to the system thereby changing the state of the system. To solve the MI-MPC, the controller transforms the state constraints into state-invariant control constraints on the control inputs to the system, such that any combination of values for the control inputs, resulting in a sequence of values for the state variables that satisfy the state constraints, also satisfy the state-invariant control constraints, and solve the MI-MPC problem subject to the state constraints and the state-invariant control constraints.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: May 4, 2021
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Rien Quirynen, Pedro Hespanhol, Stefano Di Cairano
  • Patent number: 10995762
    Abstract: A compressor system is described, including: at least a first compressor having a suction side and a delivery side; an anti-surge line; an anti-surge valve arranged along the anti-surge line and controlled for recirculating a gas flow from the delivery side back to the suction side of the compressor; a heat removal arrangement between the anti-surge valve and the suction side of the compressor.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: May 4, 2021
    Assignee: NUOVO PIGNONE SRL
    Inventors: Lorenzo Gallinelli, Marco Pelella
  • Patent number: 10982887
    Abstract: A compression refrigeration system includes a switch to select between a plurality of operation modes of a metering device that controls a rate of flow of a refrigerant to an evaporator of the compression refrigeration system. Each operation mode is associated with a respective refrigerant. Further, the compression refrigeration system includes a reference database that comprises pressure-temperature data associated with a plurality of refrigerants. Furthermore, the compression refrigeration system includes a valve adjustment engine that is communicatively coupled to the switch and the reference database. The valve adjustment engine controls the metering device based on an operation mode of the metering device that is selected using the switch. The operation mode is selected based on a refrigerant with which the compression refrigeration system is currently charged.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: April 20, 2021
    Assignee: Rheem Manufacturing Company
    Inventors: Harshad V. Inamdar, Christina M. Hughes, Derek L. Brasuell, Sivakumar Gopalnarayanan, Swapnil S. Khaire
  • Patent number: 10955175
    Abstract: An apparatus includes a high side heat exchanger, a second heat exchanger, a load, a variable speed compressor, and a three-way valve. The high side heat exchanger removes heat from a refrigerant. The second heat exchanger removes heat from the refrigerant. The load uses the refrigerant to remove heat from a space proximate the load. The variable speed compressor compresses the refrigerant from the load and directs the compressed refrigerant to the high side heat exchanger. The three-way valve, when operating in a first mode, directs the refrigerant from the high side heat exchanger to the load and when operating in a second mode, directs the refrigerant from the high side heat exchanger to the second heat exchanger.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: March 23, 2021
    Assignee: Lennox Industries Inc.
    Inventors: Eric Berg, Austin Clay Styer, Carl T. Crawford
  • Patent number: 10948208
    Abstract: An HVAC system is provided. Embodiments of the present disclosure generally relate to an HVAC system in which multiple indoor units are coupled to central outdoor unit, where at least one of the indoor units is configured to provide conditioned air through ductwork and at least one indoor unit is configured to provide conditioned air without ductwork. Moreover, a gas furnace can be provided in the system, for harsher environments that benefit from more robust heating. Additional systems, devices, and methods are also disclosed.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: March 16, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Masahiro Oka, Junichi Shimoda, Takashi Shimamura, Yuuji Yamada, Hideyuki Nakagawa, Hiroyuki Imada, David Palazzolo, Joseph Kelly Hearnsberger, Sriram Venkat, Chris Bellshaw, John Clements
  • Patent number: 10866018
    Abstract: An air conditioner is provided. The air conditioner includes a heat pump cycle channel in which a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are connected with one another in sequence. A resistance channel is disposed between an outlet of the compressor and the outdoor heat exchanger to increase pressure of refrigerant flowing from the outlet to the outdoor heat exchanger.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: December 15, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hisashi Takeichi, Masahiro Aono
  • Patent number: 10854425
    Abstract: Methods and systems for controlling temperatures in plasma processing chamber with reduced controller response times and increased stability. Temperature control is based at least in part on a feedforward control signal derived from a plasma power input into the processing chamber. A feedforward control signal compensating disturbances in the temperature attributable to the plasma power may be combined with a feedback control signal counteracting error between a measured and desired temperature.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: December 1, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Chetan Mahadeswaraswamy, Walter R Merry, Sergio Fukuda Shoji, Chunlei Zhang, Yashaswini Pattar, Duy D Nguyen, Tina Tsong, Shane C Nevil, Douglas A Buchberger, Jr., Fernando M Silveira, Brad L Mays, Kartik Ramaswamy, Hamid Noorbakhsh
  • Patent number: 10844860
    Abstract: Variable volume ratio compressors may be controlled using a switching parameter based on compressor speed and suction density to improve the matching of compressor volume ratio to desired discharge conditions. Delay periods may be implemented in the determination of when to change volume ratio to control the frequency of changes to the volume ratio. The switching parameter may be a product of the compressor speed and suction density. The volume ratio of the compressor may be controlled by switching valves directing pressure to a piston of a variable volume ratio system of the compressor.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: November 24, 2020
    Assignee: Trane International Inc.
    Inventors: Christopher Espelien, Scott M. Branch
  • Patent number: 10823463
    Abstract: A vapor compression system (200; 400; 600; 700; 800; 900; 1000) comprises a plurality of valves (260, 262, 264; 260) controllable to define a first mode flowpath and a second mode flowpath. The first mode flowpath is sequentially through: a compressor (22); a first heat exchanger (30); a first nozzle (228; 624); and a separator (48), and then branching into: a first branch returning to the compressor; and a second branch passing through an expansion device (70) and a second heat exchanger (64) to the rejoin the flowpath between the first heat exchanger and the separator. The second mode flowpath is sequentially through: the compressor; the second heat exchanger; a second nozzle (248; 625); and the separator, and then branching into: a first branch returning to the compressor; and a second branch passing through the expansion device and first heat exchanger to the rejoin the flowpath between the first heat exchanger and the separator.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: November 3, 2020
    Assignee: Carrier Corporation
    Inventors: Hongsheng Liu, Parmesh Verma, Thomas D. Radcliff
  • Patent number: 10814696
    Abstract: A heat exchange system for a vehicle including a battery, an electric motor, and a transmission system is provided. The heat exchange system includes a heat pump, and a heat exchanger. The heat pump is used for air conditioning. The heat pump includes an electric compressor that compresses a refrigerant. The electric compressor is configured to be driven with electric power from the battery. The heat exchanger is configured to exchange heat between the refrigerant and lubricating oil that lubricates the transmission system.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: October 27, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoshi Tominaga, Daisuke Tokozakura, Hideki Kubonoya
  • Patent number: 10782066
    Abstract: A refrigeration control method and a refrigerator. The refrigeration control method for a refrigerator comprises: acquiring the refrigeration state of a first evaporator and the refrigeration state of a second evaporator; when the first evaporator performs refrigeration, acquiring the temperature of a second compartment; when the temperature of the second compartment is greater than the starting temperature of the second compartment and the difference therebetween is less than a first preset threshold, acquiring the temperature of a first compartment and determining whether the temperature of the first compartment is less than a preset first reference temperature, the first reference temperature being calculated according to the starting temperature of the first compartment and a set adjustment temperature; and when the temperature of the first compartment is less than the first reference temperature, switching the refrigerator into a state where the second evaporator performs refrigeration.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: September 22, 2020
    Assignee: QINGDAO HAIER JOINT STOCK CO., LTD
    Inventors: Lisheng Ji, Shengyuan Nie, Feifei Qi, Haibo Tao
  • Patent number: 10767881
    Abstract: A method of controlling a compressor is disclosed. The method includes: after the compressor is stopped for protection, updating the number of protective stops of the compressor occurring during a current operation of the air conditioner; and when the number of protective stops of the compressor is greater than a first preset number, lowering the frequency of the compressor so that when the compressor restarts the compressor would start and operate at the lowered frequency. Disclosed also is a device for controlling a compressor. Thus, by lowering the frequency of the compressor, the compressor would reach the high or low temperature protective value comparatively slowly, so the number of restarts of the compressor can be reduced.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 8, 2020
    Assignees: GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.
    Inventor: Yong Wang
  • Patent number: 10753660
    Abstract: An air-conditioning apparatus is able to ensure an appropriate flow rate of refrigerant and an appropriate amount of oil returned to a compressor that match operation conditions regardless of an operating state of a refrigerant circuit and a change in an operation condition. The air-conditioning apparatus includes: a first detector configured to detect a refrigerant temperature within an accumulator; a storage unit configured to store information regarding a two-layer separation temperature of refrigerant and refrigerating machine oil; a determiner configured to compare the refrigerant temperature with the two-layer separation temperature and determine a two-layer separation state of the refrigerant and the refrigerating machine oil; a second detector configured to detect a state of the refrigerant sucked by the compressor; and a control unit configured to adjust an opening degree of a flow control valve on the basis of the two-layer separation state and a state of the sucked refrigerant.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: August 25, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Fukui, Masafumi Tomita, Kazuki Okada
  • Patent number: 10753662
    Abstract: An air conditioner that is a refrigeration apparatus has, in a refrigerant circuit, a compressor, an outdoor heat exchanger that functions as an evaporator in a heating operation, an indoor heat exchanger that functions as a condenser in the heating operation, and a four way valve. The refrigerant circuit is configured in such a way that a high-pressure value of the refrigerant circuit in a defrost operation is lower than a high-pressure value of the refrigerant circuit in the heating operation. An end-of-defrost frequency decrease rate, which is a rate of decrease in the operating frequency of the compressor in the defrost operation, is set faster than a normal frequency decrease rate, which is a rate of decrease in the operating frequency of the compressor in the heating operation.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: August 25, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takahiro Nakata, Hiroshi Itou
  • Patent number: 10731904
    Abstract: An air conditioner includes a compressor, a condenser, an expansion valve, an evaporator, and a temperature detection unit. The temperature detection unit is attached to the condenser and is configured to detect a temperature of the refrigerant in the condenser. The expansion valve is configured to be capable of adjusting a flow rate per unit time of the refrigerant flowing through the expansion valve by adjusting a degree of opening of the expansion valve. The degree of opening of the expansion valve is increased when the temperature of the refrigerant detected by the temperature detection unit rises, and the degree of opening of the expansion valve is decreased when the temperature of the refrigerant detected by the temperature detection unit falls.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: August 4, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Komei Nakajima, Yusuke Tashiro, Yasuhide Hayamaru, Yusuke Adachi
  • Patent number: 10712050
    Abstract: A multi-stage heat engine having an evaporator, a condenser, expander stages; vapour compression stages; tanks for holding gaseous phases of a fluid. The compressor stages is adapted to compress the gaseous phase in the adjacent tank with a higher pressure than which occurred at expansion and to move the compressed fluid to the next adjacent tank at a higher pressure, the expander stages are adapted to expand a part of the compressed fluid in each tank, to expand the fluid in the adjacent tank at a lower pressure, the compressor and expander sections are adapted to output the gaseous phase at the highest pressure to the condenser and the liquid phase at the lowest pressure to the evaporator, where the output of the condenser are fed back to the tank at the highest pressure and the output of the evaporator is fed back to the tank at the lowest pressure.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: July 14, 2020
    Assignee: VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK (VITO)
    Inventor: Johan Van Bael
  • Patent number: 10697674
    Abstract: A vapor compression system includes a first conduit fluidly coupling a liquid collection portion of a condenser and an evaporator, where the first conduit is configured to direct a first flow of refrigerant from the condenser to a first inlet of the evaporator and a second conduit fluidly coupling the liquid collection portion of the condenser and the evaporator, where the second conduit is configured to direct a second flow of refrigerant from the condenser to a second inlet of the evaporator via gravitational force, and where the first inlet is disposed above the second inlet relative to a vertical dimension of the evaporator.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 30, 2020
    Assignee: Johnson Controls Technology Company
    Inventors: Jeb William Schreiber, Seth Kevin Gladfelter, Kevin Donald Krebs, Cameron Stuart Nelson
  • Patent number: 10700397
    Abstract: A battery pack includes a plurality of cartridges that are stackable in a vertical direction in which each cartridge of the plurality of cartridges extends in a longitudinal direction perpendicular to the vertical direction, and a plurality of battery cells in which each battery cell is disposed in a cartridge of the plurality of cartridges. Each cartridge of the plurality of cartridges includes a battery cell contact body that is configured to contact a battery cell of the plurality of battery cells and support the battery cell, and at least one duct that is configured to transmit heat from the battery cell contact body to air by passing air through the at least one duct. Each duct of the plurality of cartridges is configured to communicate air with another duct of an adjacent cartridge.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: June 30, 2020
    Assignee: LG Electronics Inc.
    Inventor: Ingook Son
  • Patent number: 10661632
    Abstract: Disclosed herein is a heat pump system for a vehicle, which includes a compressor, an air-cooled condenser mounted on a warm air passageway, expansion means and an evaporator mounted on a cold air passageway of an air-conditioning case in order to carry out heating and cooling and further includes a water-cooled condenser mounted on a refrigerant circulation line between the compressor and the air-cooled condenser to exchange heat between refrigerant and coolant, thereby reducing the number and the size of blowers and the size of the entire system because the size of the air-cooled condenser inside the warm air passageway is reduced, and decreasing power consumption and noise by reducing capacity of a motor of the blower.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: May 26, 2020
    Assignee: HANON SYSTEMS
    Inventors: Hae Jun Lee, Jae Chun Ryu, Yong Nam Ahn, Sung Je Lee, Se Min Lee
  • Patent number: 10663200
    Abstract: A method for controlling a supply of refrigerant to an evaporator of a vapour compression system, such as a refrigeration system, an air condition system or a heat pump. During normal operation, the opening degree of the expansion valve is controlled on the basis of an air temperature, Tair, of air flowing across the evaporator and/or on the basis of superheat of refrigerant leaving the evaporator. If at least one sensor used for obtaining Tair or the superheat is malfunctioning, operation of the vapour compression system is switched to a contingency mode. A reference temperature, Tout, ref, is calculated, based on previously obtained values of a temperature, Tout, of refrigerant leaving the evaporator, during a predefined previous time interval, and subsequently the opening degree of the expansion valve is controlled on the basis of the obtained temperature, Tout, in order to reach the calculated reference temperature, Tout, ref.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: May 26, 2020
    Assignee: DANFOSS A/S
    Inventor: Roozbeh Izadi-Zamanabadi
  • Patent number: 10663201
    Abstract: A refrigeration system includes a gas cooler/condenser configured to remove heat from a refrigerant, a temperature sensor configured to measure a temperature of the refrigerant leaving the gas cooler/condenser, a pressure sensor located along the high pressure conduit and configured to measure a pressure of the refrigerant leaving the gas cooler/condenser, a pressure control valve operable to regulate the pressure of the refrigerant leaving the gas cooler/condenser, and a controller. The controller is configured to determine whether the refrigerant leaving the gas cooler/condenser is in a subcritical region based on at least one of the measured temperature of the refrigerant or the measured pressure of the refrigerant.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: May 26, 2020
    Assignee: Hill Phoenix, Inc.
    Inventor: Niel M. Hayes
  • Patent number: 10654412
    Abstract: The notification system includes: an electric vehicle provided with a cooling box, a battery, and wheels driven by the electric power from the battery; an acquisition device configured to obtain storage information indicating storage conditions for a commodity selected by a user; a processor configured to send a warning signal when a travelling distance which can be covered by the electric vehicle with the selected commodity being preserved in the cooling box under the storage conditions indicated by the storage information is shorter than a predetermined distance; and a notification device configured to notify the user of a warning upon receiving the warning signal.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: May 19, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Zekai Qiu, Hironobu Kitaoka, Naoki Yamamuro, Kozo Kosho, Hiroaki Sugiyama, Makoto Ikegami