Time Delay Of Condition Sensing Or Control Operation Patents (Class 62/158)
  • Patent number: 11035605
    Abstract: The resent invention provides a refrigerator comprising: a cabinet having a storage chamber; a door for opening and closing the storage chamber; a case having a discharge port through which air is discharged to the storage chamber; an evaporator provided inside the case and for supplying cold air by means of heat exchange with air; a fan installed on the discharge port and for generating the airflow discharging to the storage chamber the air which has been heat exchanged in the evaporator; and a differential pressure sensor having a first pipe, of which one end is positioned on a part where the air is withdrawn to the fan, and a second pipe of which one end is positioned on a part where the air is discharged from the fan.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: June 15, 2021
    Assignee: LG Electronics Inc.
    Inventors: Kyongbae Park, Wookyung Baik, Sangbok Choi, Sungwook Kim
  • Patent number: 11009270
    Abstract: A heat pump air conditioning system and a control method. The heat pump air conditioning system includes: a compressor; an indoor unit heat exchanger, an outdoor unit heat exchanger and a throttling device; a refrigerant circulation loop, connecting the compressor, the indoor unit heat exchanger, the outdoor unit heat exchanger and the throttling device in series; the heat storage module, disposed in the refrigerant circulation loop and configured to absorb heat from refrigerant in the refrigerant circulation loop and store heat when heat storage is required, and to heat the refrigerant in the refrigerant circulation loop when the outdoor unit heat exchanger defrosting is required. The heat pump air conditioning system can store excess heat of the system for defrosting when indoor heat load is low, and release heat for defrosting by means of the heat storage module during a defrosting process while continuing supplying heat to a room.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: May 18, 2021
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Mingzhu Dong, Jianming Tan, Guanghui Xia, Bo Liang, Xianlin Wang, Xiaocheng Lai, Junhong Wu, Guangqian Peng, Xu Gao, Zhiwei Chen, Bo Yu, Wen Che, Xiaoyu Li
  • Patent number: 10978968
    Abstract: This method for controlling asynchronous electrical motors of a compressor system, comprises: —receiving an order to start a first asynchronous electrical motor and a second asynchronous electrical motor of a compressor system; —unloading said first and second motors, by operating respectively a first load control unit of the first motor and a second load control unit of the second motor, in order to reduce the mechanical load associated to said motors; —starting the first motor and, only once the first motor is running at nominal speed, starting the second motor, —loading both the first and second electrical motor only once the second motor has started and is running at nominal speed, by operating the first load control unit and the second load control unit, in order to increase the mechanical load associated to said motors.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: April 13, 2021
    Assignee: CARRIER CORPORATION
    Inventor: Stefano Bovio
  • Patent number: 10969150
    Abstract: Disclosed is a refrigerator adopting a linear compressor and a control method thereof. The method includes: monitoring the temperature of an evaporator of the refrigerator; if the current temperature of the evaporator of the refrigerator is greater than or equal to a first preset temperature threshold, then invoking a noise reduction mode to actively reduce the heat exchange amount between the evaporator and a compartment of the refrigerator until the current temperature of the evaporator of the refrigerator is smaller than or equal to a second preset temperature threshold, and invoking a cooling mode to resume the normal heat exchange between the evaporator and the compartment of the refrigerator, wherein the first preset temperature threshold is higher than the second preset temperature threshold.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 6, 2021
    Assignee: QINGDAO HAIER JOINT STOCK CO., LTD.
    Inventors: Lisheng Ji, Jianru Liu, Xiaobing Zhu, Feifei Qi, Shufeng Zhang, Caiyun Zhao
  • Patent number: 10913448
    Abstract: Systems and methods for operating an engine and a driveline disconnect clutch are presented. In one example, a transient vehicle maneuver that may allow at least some air to be drawn into an oil pump pickup tube may be detected. Engine torque may be reduced and a pump output command may be increased responsive to the transient vehicle maneuver.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: February 9, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Corey Blue, Joseph Kucharski
  • Patent number: 10875384
    Abstract: An air flow circulation structure for a vehicle includes a front shutter that opens or closes an outside air intake port, a fan and a duct member. The fan is configured to cause air to flow in a direction oriented from the outside air intake port through a heat exchanger toward an engine compartment when the front shutter is in an open state, and to cause the air to flow in a direction oriented from the engine compartment through the heat exchanger toward the outside air intake port when the front shutter is in a closed state. The duct member is configured to guide the air that is changed in direction by blowing from the fan and colliding with the front shutter to a heat source of the vehicle, when the front shutter is in the closed state.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: December 29, 2020
    Assignee: DENSO CORPORATION
    Inventors: Go Sato, Wei Chen
  • Patent number: 10823769
    Abstract: The invention relates to a method of determining power consumption of an electrical heating system, where the power consumption is defined by a reading of information from a conductor (4, 6) within a thermostat (1). The invention further relates to a thermostat comprising an element for determining the power consumption of an electrical heating system, where the thermostat (1) is provided with a reading element (5) for reading current from a conductor (4, 6) and a reading element (28) reading voltage from a transformer output.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: November 3, 2020
    Assignee: OJ Electronics A/S
    Inventors: Stefan Ott Hansen, Anker Bo Christensen
  • Patent number: 10809022
    Abstract: Processes for controlling the rate and temperature of cooling fluid through a heat exchange zone in, for example, an alkylation reactor using an ionic liquid catalyst. A cooling fluid system may be used to provide the cooling fluid which includes a chiller and a reservoir. The cooling fluid may pass from the reservoir through the heat exchange zone. A bypass line may be used to pass a portion of the cooling fluid around the heat exchange zone. The amount of cooling fluid may be adjusted, with a valve, based upon the temperature of the cooled process fluid flowing out of the heat exchange zone. Some of the cooling fluid from the chiller may be circulated back to the chiller in a chiller loop.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: October 20, 2020
    Assignee: UOP LLC
    Inventors: Gregory J. Schrad, James G. Hagen, Sean G. Mueller, Trung Pham, Zhanping Xu
  • Patent number: 10712062
    Abstract: A refrigerant distributor includes: a first introduction pipe configured to be open at a first end and closed at a second end and to cause refrigerant to flow from the first end toward the second end; a second introduction pipe configured to be closed in ends on both upstream and downstream sides and to cause the refrigerant to flow in a direction opposite to a refrigerant flow direction in the first introduction pipe; a plurality of branch pipes connected in series along a refrigerant flow direction on the second introduction pipe; and an adjusting pipe configured to connect the first introduction pipe and the second introduction pipe.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryohei Horiba, Tatsunori Sakai, Kumi Aoki, Akihide Terao, Keiichi Tomita, Hirohito Yagi
  • Patent number: 10703166
    Abstract: Air conditioner for a vehicle in which low pressure protection is accurately performed to improve reliability. A controller adjusts a number of revolution Nc of a compressor 2 so that a detected value does not decrease below a limiting target value TGTs, on the basis of the detected value of a suction temperature sensor and a limiting target value TGTs set to a suction refrigerant temperature of the compressor 2. The controller has a predetermined limiting lower limit TGTsL and a predetermined limiting upper limit TGTsH which is higher than the predetermined limiting lower limit, and adjusts the number of revolution Nc of compressor 2 so that the limiting target value TGTs is the limiting upper limit TGTsH on startup of compressor 2, and the controller gradually decreases the limiting target value TGTs toward the limiting lower limit TGTsL, when the detected value decreases to the limiting upper limit TGTsH.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: July 7, 2020
    Assignee: SANDEN AUTOMOTIVE CLIMATE SYSTEMS CORPORATION
    Inventors: Kenichi Suzuki, Ryo Miyakoshi, Kohei Yamashita
  • Patent number: 10697679
    Abstract: A refrigerator apparatus having a compressor, a condenser, an evaporator, and a valve interconnected in the flow from the condenser to the evaporator. The valve is operatively controlled to a first, open, state and to a second, closed, state by a controller. The controller is configured to the valve to operate in accordance with at least one of: opening the valve a time period of 0-180 seconds before the compressor is switched to an on-phase; and closing the valve before the compressor is switched to an off-phase.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: June 30, 2020
    Assignee: ELECTROLUX APPLIANCES AKTIEBOLAG
    Inventors: Andreas Aschan, Richard Furberg, Trung Pham Viet
  • Patent number: 10670296
    Abstract: A climate-control system includes a variable-capacity compressor, an outdoor ambient temperature sensor, a user-controlled device, and a control module. The outdoor ambient temperature sensor indicates a temperature of outdoor ambient air. The user-controlled device provides a demand signal indicating a demand for at least one of heating and cooling. The control module commands a compressor stage and a stage run time based on the temperature from the outdoor ambient temperature sensor and the demand signal. The control module also modifies a lockout threshold based on a cycle run time, where the cycle run time is an actual run time for the compressor to meet a setpoint temperature.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: June 2, 2020
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Sahil Popli, Joseph L. Linsenmeyer
  • Patent number: 10632820
    Abstract: A vehicle heating, ventilating, and air conditioning (HVAC) system can reduce a load applied to a vehicle powertrain during certain conditions. The system can include a fixed compressor operable between an ON state and in an OFF state. Systems and methods can determine whether an engine water temperature meets a forced HVAC recirculation intake threshold. Responsive to determining that the engine water temperature meets the forced HVAC recirculation intake threshold, it can be determined if the engine water temperature meets a high water temperature threshold. Responsive to determining that the engine water temperature meets the high water temperature threshold, it can be determined if a vehicle pitch meets a vehicle pitch threshold. Responsive to determining that the vehicle pitch does not meet the vehicle pitch threshold, the compressor can be operated according to an AC cut cycle.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: April 28, 2020
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: David W. Cosgrove, Hidekazu Hirabayashi
  • Patent number: 10611213
    Abstract: There is disclosed a vehicular air-conditioning device of a so-called heat pump system which eliminates or decreases noise generated when an opening/closing valve opens at a changing time of an operation mode. The vehicular air-conditioning device executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator 4, decompress the refrigerant by which heat has been radiated, and then let the refrigerant absorb heat in an outdoor heat exchanger 7, and a dehumidifying and heating mode to open a solenoid valve 22 in a state of the heating mode, decompress at least a part of the refrigerant flowing out from the radiator and then let the refrigerant absorb heat in a heat absorber 9. When the heating mode changes to the dehumidifying and heating mode, the controller decreases a radiator pressure or a pressure difference before and after the solenoid valve to a predetermined value or less, and then opens the solenoid valve 22.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: April 7, 2020
    Assignee: SANDEN HOLDINGS CORPORATION
    Inventors: Kenichi Suzuki, Ryo Miyakoshi, Kouhei Yamashita, Hidenori Takei
  • Patent number: 10569621
    Abstract: The present disclosure provides a casing for an air conditioning unit including a main body, a door, a passing defining member, and a drain channel. The main body includes a fresh-air passage and a recirculation-air passage. The recirculation-air passage is positioned below the fresh-air passage. The door selectively opens and closes a communication hole through which the fresh-air passage and the recirculation-air passage are in fluid communication with each other. The passage defining member is disposed upstream of the communication hole and defines a lower side of the fresh-air passage. The drain channel extends from the passage defining member to a space outside of the recirculation-air passage to discharge condensed water generated in the fresh-air passage.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: February 25, 2020
    Assignee: DENSO International America, Inc.
    Inventors: Ercole Santilli, Ross Mischnick, James Link
  • Patent number: 10500923
    Abstract: Methods and system for operating a heat pump in different operating modes and providing a predictable heat pump response when the heat pump is transitioned between the different operating modes are presented. In one example, a controller that includes executable instructions for providing a bumpless compressor command for operating the heat pump is disclosed.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: December 10, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Yu Liu, Anthony David Tsakiris, Brett Allen Dunn
  • Patent number: 10284122
    Abstract: A compressor of a refrigeration appliance includes a motor, in particular a BLDC motor, and a controller for stopping the motor. The controller is configured to slow down the motor rotating in a first rotating direction until it comes to a standstill and to subsequently position the rotor relative to the stator, in a second rotating direction with a predetermined torque. A method for stopping a compressor of a refrigeration appliance is also provided.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: May 7, 2019
    Assignee: BSH Hausgeraete GmbH
    Inventors: Tommy Beckmann, Volker Braun, Achim Paulduro, Sebastian Rau
  • Patent number: 10240836
    Abstract: A system and method are provided including a system controller for a refrigeration or HVAC system having a compressor rack with a compressor and a condensing unit with a condenser fan. The system controller monitors and controls operation of the refrigeration or HVAC system. A rack controller monitors and controls operation of the compressor rack and determines compressor rack power consumption data. A condensing unit controller monitors and controls operation of the condensing unit and determines condensing unit power consumption data. The system controller receives the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC system, determines a predicted power consumption or a benchmark power consumption for the refrigeration system, compares the total power consumption with the predicted power consumption or the benchmark power consumption, and generates an alert based on the comparison.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: March 26, 2019
    Assignee: Emerson Climate Technologies Retail Solutions, Inc.
    Inventors: John Wallace, Franklin Beltran, Frank S. Wallis, Keith Bertie, Paul L. Fullenkamp
  • Patent number: 10156396
    Abstract: The present invention provides for a system for operating a heating, ventilation, and air conditioning (HVAC) system. A controller operates compressors in tandem connected to an evaporator. In response to detection of a pre-freezing condition of in the coils of the evaporator, the controller adjusts an operating condition of the HVAC system.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: December 18, 2018
    Assignee: Lennox Industries Inc.
    Inventors: Der-Kai Hung, Harold Gene Havard, Jr., Rosa Maria Leal
  • Patent number: 10139149
    Abstract: A refrigerant recovery operation method for use in a refrigerator in which a freezing chamber and a refrigerating chamber are independently cooled is disclosed. The refrigerator and the method for controlling the same provide for performing the refrigerant recovery operation not only when the compressor starts operation but also before the compressor stops operation. The refrigerator increases the refrigerant recovery amount within a predetermined pressure range in which the compressor can operate, and controls the refrigerant recovery operation time according to the outdoor air temperature.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: November 27, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang Hak Lim, Kook Jeong Seo, Young Seok Kim, Yoon Young Kim, Won-Jae Yoon, Kyung Hoon Choi
  • Patent number: 10132576
    Abstract: A method for operating a heat exchanger, through which a heat transfer medium flows on a primary side, entering the heat exchanger with a first temperature and exiting the heat exchanger with a second temperature. The heat transfer medium emits on a secondary side a heat flow to a secondary medium flowing through the heat exchanger in the case of heating or, in the case of cooling, absorbs a heat flow from the secondary medium which enters the heat exchanger with a third temperature and exits the heat exchanger again with a fourth temperature. The heat exchanger is capable of transferring a maximum heat flow. At least three of the four temperatures are measured and the respective saturation level of the heat exchanger is determined from these measured temperatures and is used for controlling the operation of the heat exchanger.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: November 20, 2018
    Assignee: BELIMO HOLDING AG
    Inventors: Markus Friedl, Marc Thuillard
  • Patent number: 10082330
    Abstract: A refrigerator and a method for controlling a refrigerator, including a plurality of compressors and a plurality of evaporators disposed on inlet-sides of the plurality of compressors to supply cool air to a refrigerating compartment and a freezing compartment includes determining whether a temperature of the refrigerating compartment belongs to a refrigerating compartment satisfaction range, determining an indoor temperature when the temperature of the refrigerating compartment does not belong to the refrigerating compartment satisfaction range, and determining whether a load corresponding operation condition is satisfied when the determined indoor temperature belongs to a set range. When the load corresponding operation condition is satisfied, a simultaneous operation of the refrigerating compartment and the freezing compartment is performed, and when the load corresponding operation condition is not satisfied, a cooling operation of the refrigerating compartment is performed.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: September 25, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Myungjin Chung, Yonghun Suh, Sung Jhee, Namsoo Cho
  • Patent number: 10078020
    Abstract: Methods and apparatus to determine home appliance cabinet temperatures using light emitting diodes (LEDs) are disclosed. An example home appliance includes a cabinet, a lighting system disposed in the cabinet having one or more LEDs to provide lighting in the interior of the cabinet, and a circuit electrically coupled to the lighting system and programmed to determine a temperature inside the cabinet based on a characteristic of the one or more LEDs of the lighting system.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: September 18, 2018
    Assignee: Whirlpool Corporation
    Inventors: Jose Paulo Remor, Joao Eduardo Santana-Borges
  • Patent number: 10066860
    Abstract: A method for controlling an air conditioning system comprises routing refrigerant through an evaporator to cool air in a space, proportioning refrigerant flow from the evaporator between a condenser circuit and a hot gas reheat circuit that heats air leaving the evaporator, routing refrigerant flow from the condenser circuit and the hot gas reheat circuit through an expansion device and back to the evaporator, monitoring a first temperature at the evaporator, stabilizing proportioning of refrigerant flow between the condenser circuit and the hot gas reheat circuit based on the monitored first temperature.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: September 4, 2018
    Assignee: Nortek Global HVAC LLC
    Inventors: James Patrick Downie, Richard Brian Reed, Richard Gerard Blasko, John Patrick McKissack, Avinash Keshavrao Gholap
  • Patent number: 10054348
    Abstract: An air conditioner is provided. The air conditioner may include at least one indoor device, an electric heat pump (EHP) outdoor device connected with the at least one indoor device, and having a first compressor driven using electric power and a first outdoor heat exchanger, and a gas heat pump (GHP) outdoor device connected with the at least one indoor device, and having an engine that drives a second compressor using a combustion gas and a second outdoor heat exchanger. The GHP outdoor device may include an exhaust gas heat exchanger that performs heat exchange between a refrigerant flowing through the EHP outdoor device and an exhaust gas of the engine.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: August 21, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Kwangho Shin, Hojong Jeong, Minho Chung, Song Choi
  • Patent number: 10047983
    Abstract: Systems and methods are disclosed that may include providing an auxiliary power source in an HVAC system, establishing a stable, uninterrupted power source to at least one system controller, starting a first component of the HVAC system prior to starting a second component of the HVAC system. The total power requirement necessary to simultaneously start the first component and the second component may generally exceed the power output capacity of the auxiliary power source.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: August 14, 2018
    Assignee: Trane International Inc.
    Inventor: Stephen Stewart Hancock
  • Patent number: 10024591
    Abstract: An HVAC system includes a plurality of sensors, a tandem compressor, and a controller. The tandem compressor comprises a first and second compressor, each comprising a crankcase heater. The controller determines that one of the sensors has failed, and in response, initiates the first and second crankcase heaters and transmits an alert indicating that one of the sensors has failed. Further, the controller may disable threshold logic such that the first and second compressors are controlled independently of a determination whether the tandem compressor is operating outside of a threshold range. The controller operates the first and second compressors according to a safe mode, wherein first on or off settings of the compressors are determined based on a first required load operation of the tandem compressor. The first required load operation is determined from a first temperature demand of a structure associated with the HVAC system.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: July 17, 2018
    Assignee: Lennox Industries Inc.
    Inventors: Rakesh Goel, Anuradha Sundararajan
  • Patent number: 9989290
    Abstract: Condenser control, systems, devices, and methods are described herein. One system includes a number of pressure sensors, wherein each of the number of pressure sensors is configured to sense a pressure associated with a condenser of a refrigeration system, a temperature sensor configured to sense an outdoor air temperature, and a controller configured to activate operation of a number of condenser fans and a number of split valves associated with the condenser based, at least in part, on the sensed outdoor air temperature upon a failure of each of the number of pressure sensors.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: June 5, 2018
    Assignee: Honeywell International Inc.
    Inventors: Charles John Tiranno, Victor Lavrisiuk
  • Patent number: 9982955
    Abstract: A method for operating a heat exchanger, through which a heat transfer medium flows on a primary side, entering the heat exchanger with a first temperature and exiting the heat exchanger with a second temperature. The heat transfer medium emits on a secondary side a heat flow to a secondary medium flowing through the heat exchanger in the case of heating or, in the case of cooling, absorbs a heat flow from the secondary medium which enters the heat exchanger with a third temperature and exits the heat exchanger again with a fourth temperature. The heat exchanger is capable of transferring a maximum heat flow. At least three of the four temperatures are measured and the respective saturation level of the heat exchanger is determined from these measured temperatures and is used for controlling the operation of the heat exchanger.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: May 29, 2018
    Assignee: BELIMO HOLDING AG
    Inventors: Markus Friedl, Marc Thuillard
  • Patent number: 9982927
    Abstract: Provided are a refrigerator and a method of controlling the refrigerator. The method includes driving a refrigerating cycle that includes a first evaporator and a second evaporator by activating a compressor and simultaneously supplying cold air to a refrigerator compartment and a freezer compartment by supplying refrigerant to the first and second evaporators according to the driving of the refrigerating cycle. The method may further include preventing the refrigerant from being introduced into the second evaporator by more than a first prescribed amount by increasing, for a first prescribed amount of time, a flow rate of the refrigerant supplied to the first evaporator; and preventing the refrigerant from being introduced into the first evaporator by more than a second prescribed amount by increasing, for a second prescribed amount of time, a flow rate of the refrigerant supplied to the second evaporator.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: May 29, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Sangbong Lee, Jangseok Lee, Hyoungkeun Lim, Myungjin Chung
  • Patent number: 9937843
    Abstract: An apparatus for holding a liquid-filled vessel includes a temperature sensor for sensing a temperature related to the temperature of the liquid in the vessel and a control unit connected to the temperature sensor. The control unit takes the sensed temperature as a basis for prompting an action. At a sensed temperature that is above a prescribed hot temperature limit value, the control unit then activates and/or influences a function that increases the safety of the vehicle occupant.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: April 10, 2018
    Assignee: Bayerische Motoren Werke Aktiegesellschaft
    Inventor: Olga Birth
  • Patent number: 9920965
    Abstract: An air conditioner and a method for controlling and air conditioner are provided. The air conditioner may include at least one compressor, a main suction passage to guide a refrigerant into the at least one compressor, at least one oil separator connected to the at least one compressor, that separates oil from the refrigerant discharged from the at least one compressor, at least one oil level sensor disposed in the at least one compressor to detect whether the at least one compressor lacks oil, a return passage to collect the oil separated from the at least one oil separator into the at least one compressor, a distribution return passage branched from the at least one return passage and connected to the main suction passage, and a valve disposed in each of the at least one return passage and the distribution return passage.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: March 20, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jinyoung Joo, Seokhoon Jang
  • Patent number: 9871357
    Abstract: A cooling system for cooling a power transmission system that includes a cable configured to carry a current corresponding to a transported electric power may include: a cooling device configured to remove heat from the power transmission system; a power supply system configured to extract a power fraction from the cable and configured to supply the cooling device with the power fraction; and a control unit configured to control an amount of the extracted power fraction in response to a parameter of the electric power. When the parameter is higher than a threshold, the extracted power fraction is equal to a first value that depends on the electric power carried in the cable through a first function. When the parameter is lower than the threshold, the extracted power fraction is equal to a second value that depends on the electric power carried in the cable through a second function.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: January 16, 2018
    Assignee: PRYSMIAN S.p.A.
    Inventors: Paolo Maioli, Ernesto Zaccone
  • Patent number: 9702607
    Abstract: The present invention relates to an air-conditioner system for a vehicle and a method for controlling the same, and more particularly, to an air-conditioner system for a vehicle and a method for controlling the same which can change a target superheat degree depending on variation in an amount of refrigerant discharged from a compressor, namely, gradually decrease the target superheat degree by stages as the amount of refrigerant discharged from the compressor decreases, and control an electronic expansion valve based on the target superheat degree dropping by stages, thereby preventing performance degradation of an air conditioner and stabilizing the system by restraining a change in the superheat degree in an area where an amount of refrigerant discharged from a compressor varies.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: July 11, 2017
    Assignee: HANON SYSTEMS
    Inventors: Jaewoo Ko, Gyuik Han, Saedong Eom, Kilsang Yoon, Inkeun Kang
  • Patent number: 9604521
    Abstract: A vehicle includes an engine, an engine cooling system configured to cool the engine with a coolant, an air conditioning apparatus, a heat exchanger that exchanges heat between the coolant and a refrigerant, and an ECU that controls the air conditioning apparatus. The air conditioning apparatus includes a compressor that compresses the refrigerant, and the compressor is driven in response to an air conditioning request to air condition a passenger compartment. Even in the absence of the air conditioning request, the ECU causes the compressor to be driven to heat the coolant by radiation of heat from the refrigerant.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: March 28, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hidekazu Hirabayashi, Kunihiko Jinno, Hiroaki Matsumoto
  • Patent number: 9574785
    Abstract: One aspect of the disclosure describes a controller for a heating, ventilation, and air conditioning (HVAC) unit. In one embodiment, the HVAC controller includes an interface and a processor. In this embodiment, the interface is configured to receive a delay originating signal. In one embodiment, the processor is configured to: (1) automatically generate an offset delay value for the HVAC unit upon receipt of the delay originating signal; (2) apply the offset delay value based on an offset enabled configurable parameter; and (3) delay starting identified components of the HVAC unit based on the offset delay value.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: February 21, 2017
    Assignee: Lennox Industries Inc.
    Inventors: John P. Stachler, Stephen A. Walter, Alan E. Bennett, Richard A. Mauk
  • Patent number: 9543887
    Abstract: A selection unit switches between a phase ?p and a phase ?n different from the phase ?p substantially by 180 degrees, and outputs one of them in synchronization with a carrier signal. A voltage-command generation unit generates and outputs three-phase voltage command values Vu*, Vv* and Vw* based on the phase outputted by the selection unit. A PWM-signal generation unit generates three-phase voltage command values Vu*?, Vv*? and Vw*? by correcting the three-phase voltage command values Vu*, Vv* and Vw* outputted by the voltage-command generation unit according to a predetermined method, and generates six drive signals corresponding to switching elements of the inverter based on the three-phase voltage command values Vu*?, Vv*? and Vw*? and the carrier signal. The PWM-signal generation unit outputs the generated drive signals to the corresponding switching elements of the three-phase inverter, to cause the inverter to generate a high-frequency AC voltage.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: January 10, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Takuya Shimomugi, Shinya Matsushita, Naoki Wakuta, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9335075
    Abstract: An air-conditioning apparatus once transfers energy to a heat medium other than a refrigerant and introduces the heat medium to another refrigeration cycle to achieve safety improvement and high efficiency. An air-conditioning apparatus allows first heat exchangers related to heat medium to exchange heat between a first refrigerant (heat source side refrigerant) and a first heat medium and allows a second heat exchanger related to heat medium to exchange heat between the first heat medium and a second refrigerant (hot water supply side refrigerant), such that the first refrigerant and the second refrigerant are prevented from mixing with each other.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: May 10, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yamashita, Junichi Ue, Hiroyuki Morimoto
  • Patent number: 9250001
    Abstract: Systems and methods are provided for controlling an expansion valve of a climate control system evaporator coil. An evaporator coil temperature sensor senses temperature of refrigerant within the evaporator coil near the evaporator coil outlet. A controller determines a control set point based on the refrigerant temperature near the evaporator outlet. The control set point is used to determine a valve opening area to regulate refrigerant flow into the evaporator coil such that temperature of refrigerant at the evaporator coil outlet is within a temperature band having a lower bound within a predetermined range above the liquid-to-vapor transition temperature.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: February 2, 2016
    Assignee: Emerson Electric Co.
    Inventor: Ruben Huerta-Ochoa
  • Patent number: 9193245
    Abstract: A vehicular air conditioning control device that detects an outside air temperature, and calculates the time for the evaporator blower to continue to blow after the engine has been shut off, in an air conditioning system where the compressor is powered by the engine. After a given elapsed time, the control device restarts the blower fan, issues an engine startup request, and initiates refrigerant circulation by the compressor.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: November 24, 2015
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Yasushi Kato, Masahiro Shoji, Shigeki Ito
  • Patent number: 9004369
    Abstract: A method and system is provided which receives a desired humidity level from a user for the refrigeration compartment of a refrigerator, determines the current humidity level, and then activates an atomizer in the refrigeration compartment to increase the humidity level if needed. The humidity in the refrigeration compartment may be determined based at least in part on the temperature of the refrigeration compartment, the defrost timer, the door opening times, and the compressor timer.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: April 14, 2015
    Assignee: Whirlpool Corporation
    Inventors: Anderson Bortoletto, Rameet Singh Grewal, Guolian Wu
  • Patent number: 8988247
    Abstract: Provided is a mobile terminal including a wireless communication unit that is configured to communicate with an air conditioner, a camera that captures an image of at least one photographic subject, a display unit to which the image that includes at least one graphic object corresponding to the at least one photographic subject, respectively, is output, and a controller that, if the at least one photographic subject is the air conditioner, outputs state information on the air conditioner, which includes operation information relating to a wind that is output from the air conditioner, to the vicinity of the graphic object corresponding to the air conditioner.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: March 24, 2015
    Assignee: LG Electronics Inc.
    Inventors: Younkyung Lee, Yongwoo Kim, Hyunju Kim, Jungmin Park, Joohyeon Oh, Junsoo Park
  • Patent number: 8984902
    Abstract: A cooling system for an appliance includes an evaporator stage, a compressor stage coupled to the evaporator stage and a condenser stage coupled to the compressor stage. The condenser stage includes a condenser and a condenser cooling fan for cooling the condenser, and a condenser loop coupled between the condenser stage and the evaporator stage. A humidity sensor is configured to detect a humidity level in an area of the cooling system and a controller is configured to cycle an operating state of the condenser cooling fan from ON to a low speed or OFF prior to an end of a cooling cycle.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: March 24, 2015
    Assignee: General Electric Company
    Inventors: Brent Alden Junge, Eric Paez, Joseph Thomas Waugh, Kristin Marie Weirich
  • Patent number: 8943846
    Abstract: Provided are apparatus, including electronic thermostats, for detecting temperatures and elapsed times and, in response to those temperatures and elapsed times, controlling the opening or closing of an electric circuit.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: February 3, 2015
    Assignee: Red Dot Corporation
    Inventors: Jason Vance Hartley, Peder Hamberg, Karl David Leingang
  • Patent number: 8919139
    Abstract: An air conditioning apparatus includes a refrigerant circuit, an operation controlling device and a liquid refrigerant accumulation determining device. The refrigerant circuit has an accumulator. The operation controlling device performs normal operation control where each device of the heat source unit and the utilization unit are controlled in accordance with operating load of the utilization unit, and refrigerant quantity determination operation control where properness of quantity of the refrigerant in the refrigerant circuit is determined while performing the cooling operation. The liquid refrigerant accumulation determining device determines whether or not liquid refrigerant is accumulating in the accumulator. When it has been determined that liquid refrigerant is accumulating in the accumulator, liquid refrigerant accumulation control is performed to eliminate liquid refrigerant accumulation in the accumulator.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: December 30, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Takurou Yamada, Masato Kotake, Takahiro Yamaguchi, Tadafumi Nishimura
  • Patent number: 8869546
    Abstract: A controller which receives a signal from an external associated energy utility indicative of a forthcoming rate increase period, and controls the rate of temperature change of a refrigerator from a user selected setpoint to a first targeted setpoint below the user selected setpoint. During the rate increase the controller establishes a second target setpoint above the user selected setpoint. After the rate increase period the controller reduces the temperature to the user selected setpoint at a constant rate defined by a number of degrees per minute.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: October 28, 2014
    Assignee: General Electric Company
    Inventors: John K. Besore, Timothy Dale Worthington, Michael F. Finch, Darin Franks, William Newton, Jeff Donald Drake
  • Patent number: 8853974
    Abstract: A method for connecting a second motor to a variable speed drive in parallel with at least one existing motor under load and controlled by the variable speed drive is provided. The method disconnects the existing motor from the variable speed drive and a state estimator calculates transient state of the existing motor including at least the speed of the existing motor based on a previously established load model. The method then connects the second motor to the variable speed drive and the second motor is operated using a suitable directive until the actual state of the second motor attains the calculated transient state of the existing motor at a given time. Upon attaining the calculated transient state, the existing motor is reconnected to the variable speed drive such that no current spike is generated in the aforementioned process.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: October 7, 2014
    Assignee: Schneider Toshiba Inverter Europe SAS
    Inventors: Thomas Devos, François Malrait
  • Patent number: 8756122
    Abstract: Intelligent refrigerator system for storing pharmaceutical product containers, such as vials, ampules, syringes, bottles, medication tubes, blister packs and cartons, at the point of dispensing. Embodiments of the invention use product identification technology, such as radio-frequency identification (RFID) tags and readers, to uniquely identify containers as they are added to or removed from the cold storage compartment of the refrigerator, and automatically retrieve from a local or remote database a variety of details associated with the containers and their contents, such as manufacturing data, expiration dates, time out of refrigeration, inventory levels, safety information, usage statistics, known contraindications and warnings, etc. If the details indicate that there is a problem with a particular pharmaceutical (e.g.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: June 17, 2014
    Assignee: Merck Sharp & Dohme Corp.
    Inventor: Alan J. Lowenstein
  • Publication number: 20140157806
    Abstract: A humidity control apparatus and an air-conditioning system are capable of controlling the latent heat processing amount and the sensible heat processing amount in accordance with an indoor heat load without decreasing the operation efficiency. Every time an air route is switched to an air route A or an air route B, the route maintenance time for the switched air route is set on the basis of the heat load within a dehumidification target space, and switching of switching devices is controlled such that the set route maintenance time is ensured.
    Type: Application
    Filed: July 27, 2011
    Publication date: June 12, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shinichi Ito, Masaki Toyoshima, Fumitake Unezaki
  • Patent number: 8661837
    Abstract: To maintain an appropriate humidity in a refrigerator using a spray device to spray mist, without depending on a moisture sensor. A refrigerator (100) for forcibly circulating cold air which is gas cooled in a cooling compartment (110), the refrigerator including: a first storage compartment (107) disposed on the way of an air passage; a spray device (131) which sprays mist into the first storage compartment (107); a damper (145) disposed upstream of the first storage compartment (107); a delay unit (156) which generates, based on an open signal issued when the damper (145) is opened, a first signal for stopping the operation of the spray device (131) after an elapse of a first time period, and to generate, based on a close signal issued when the damper (145) is closed, a second signal for starting the operation of the spray device (131) after an elapse of a second time period; and a control unit (146) which controls the spray device (131).
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: March 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Kenichi Kakita, Toshiaki Mamemoto, Satomi Ueda