Patents by Inventor Kengo Sugimura

Kengo Sugimura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11014430
    Abstract: A refrigeration cycle device has a compressor, a radiator, a decompressor, an evaporator, a heat medium cooling evaporator, a cooling target device, a detector, and a controller. The heat medium cooling evaporator cools a cooling heat medium by performing a heat exchange between the refrigerant decompressed in the decompressor and the cooling heat medium. The cooling heat medium cools the cooling target device. The detector detects a subcooling state of the cooling target device having a temperature lower than or equal to a reference temperature. Upon the detection of the subcooling state in the cooling target device by the detector, the controller increases the degree of superheat of the refrigerant flowing out of the heat medium cooling heat exchanger as compared to the degree of superheat of the refrigerant flowing out of the heat medium cooling heat exchanger when the detector does not detect the subcooling state.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: May 25, 2021
    Assignee: DENSO CORPORATION
    Inventors: Koji Miura, Yoshiki Kato, Masayuki Takeuchi, Nobuyuki Hashimura, Keigo Sato, Norihiko Enomoto, Kengo Sugimura, Ariel Marasigan
  • Patent number: 10989447
    Abstract: A refrigeration cycle device includes a compressor, a condenser, a first decompressor, an outside heat exchanger, and an evaporator. A predetermined part of a refrigerant passage from the condenser to the first decompressor through which the refrigerant flows is a condenser outlet portion. A predetermined part of a refrigerant passage from the first decompressor to the outside heat exchanger through which the refrigerant flows is an outside heat exchanger inlet portion. A predetermined part of a refrigerant passage from the outside heat exchanger to the second decompressor through which the refrigerant flows is an outside heat exchanger outlet portion. A volume capacity of the condenser outlet portion is larger than a volume capacity of the outside heat exchanger inlet portion. According to the refrigeration cycle device, preferable coefficient of performance of cycle can be achieved in different operation modes.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: April 27, 2021
    Assignee: DENSO CORPORATION
    Inventors: Koji Miura, Yoshiki Kato, Masayuki Takeuchi, Nobuyuki Hashimura, Keigo Sato, Norihiko Enomoto, Kengo Sugimura, Ariel Marasigan
  • Publication number: 20210108841
    Abstract: A refrigerant cycle device includes a compressor, a radiator, a first expansion valve, a second expansion valve, a first evaporator, a second evaporator, and a controller. The controller is configured to switch between a first evaporator priority control and a second evaporator priority control. During the first evaporator priority control, the controller controls a throttle opening of the second expansion valve based on at least one of a temperature of a first evaporator, a temperature of a refrigerant flowing through the first evaporator, and a temperature of an air having exchanged heat in the first evaporator. During the second evaporator priority mode, the controller controls the throttle opening based on a refrigerant state of the second evaporator. When the at least one of the temperatures is equal to or greater than a switching temperature, the second priority mode is switched to the first priority mode.
    Type: Application
    Filed: December 3, 2020
    Publication date: April 15, 2021
    Inventors: Kengo SUGIMURA, Satoshi ITO, Yuichi KAMI, Hiroyuki KOBAYASHI
  • Publication number: 20210101450
    Abstract: A refrigeration cycle device includes a compressor, a radiator, an air-conditioning heat exchanger, a cooling heat exchanger, an air-conditioning decompression unit, a cooler-unit decompression unit, a refrigerant flow rate detector, and a controller. The radiator is configured to radiate heat of refrigerant discharged from the compressor. The air-conditioning heat exchanger absorbs heat from air to evaporate the refrigerant. The cooling heat exchanger is arranged in parallel with the air-conditioning heat exchanger in the flow of refrigerant. The air-conditioning decompression unit adjusts a decompression amount of the refrigerant flowing into the air-conditioning heat exchanger. The cooler-unit decompression unit adjusts a decompression amount of the refrigerant flowing into the cooling heat exchanger. The controller controls the operation of the cooler-unit decompression unit so that the flow rate of the refrigerant detected by the refrigerant flow rate detector exceeds a predetermined reference flow rate.
    Type: Application
    Filed: December 2, 2020
    Publication date: April 8, 2021
    Inventors: Hiroyuki KOBAYASHI, Yuichi KAMI, Kengo SUGIMURA, Satoshi ITO
  • Publication number: 20210101451
    Abstract: A first evaporator cools air-conditioning air. A second evaporator cools an object. A first orifice unit and a second orifice unit are capable of changing a refrigerant amount of the first evaporator and the second evaporator, respectively. A control unit controls both the first orifice unit and the second orifice unit so that a temperature of the second evaporator approaches a target temperature. The control unit, in a first mode, performs control not to evaporate a refrigerant at the first evaporator and to evaporate the refrigerant at the second evaporator. The control unit, in a second mode, performs control to evaporate the refrigerant at both the first evaporator and the second evaporator. The control unit sets the target temperature in a first mode higher than that in a second mode.
    Type: Application
    Filed: December 17, 2020
    Publication date: April 8, 2021
    Inventors: Hiroyuki KOBAYASHI, Satoshi ITO, Yuichi KAMI, Kengo SUGIMURA
  • Publication number: 20210102716
    Abstract: A refrigeration cycle device includes a heating unit, an air-heating expansion valve, an outdoor heat exchanger, an air-cooling expansion valve, an indoor evaporator, and a cooler-unit expansion valve, a cooler unit, and a refrigerant circuit switching unit. In a heating series cooler-unit mode, refrigerant is circulated in order of the heating unit, the air-heating expansion valve, the outdoor heat exchanger, the cooler-unit expansion valve, and the cooler unit. In a heating parallel cooler-unit mode, refrigerant is circulated in order of the heating unit, the air-heating expansion valve, and the outdoor heat exchanger, and refrigerant is circulated in order of the heating unit, the cooler-unit expansion valve, and the cooler unit.
    Type: Application
    Filed: December 2, 2020
    Publication date: April 8, 2021
    Inventors: Satoshi ITO, Kengo SUGIMURA, Yuichi KAMI, Hiroyuki KOBAYASHI
  • Publication number: 20210088246
    Abstract: An air conditioner includes a heat medium circuit, a refrigerant cycle device, a discharge capacity controlling section, a heat generation amount controlling section, a target temperature determining section, and an upper limit determining section. The heat medium circuit includes a heating heat exchanger and an electric heater. The refrigerant cycle device exchanges heat between a heat medium in the heat medium circuit and a refrigerant discharged from an electric compressor. During a heater priority mode, the rotational speed of the compressor is increased to reach an upper limit and a heating amount of the heater is increased as a temperature difference increases. During a compressor priority mode, the heating amount of the heater is decreased and the rotational speed is increased to compensate for a decreasing amount.
    Type: Application
    Filed: December 4, 2020
    Publication date: March 25, 2021
    Inventors: Yuichi KAMI, Kengo SUGIMURA, Mitsuo OOURA
  • Patent number: 10940740
    Abstract: In a heat pump system, when a heat-shock determination portion determines that a difference between a coolant temperature in a coolant flow path and a coolant temperature in a heat source flow path is equal to or higher than a predetermined temperature, a flow-path switching portion mixes the respective coolants flowing through at least a bypass flow path and the heat source flow path together to flow into the coolant flow path.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 9, 2021
    Assignee: DENSO CORPORATION
    Inventors: Kengo Sugimura, Yoshiki Katoh, Masayuki Takeuchi, Koji Miura, Norihiko Enomoto, Keigo Satou, Ariel Marasigan, Nobuyuki Hashimura
  • Patent number: 10837348
    Abstract: A thermal management device for a vehicle includes heat medium circuits, a reserve tank, and a connector. The heat medium circulates through the heat medium circuits separately. The reserve tank is configured to separate an air bubble contained in the heat medium from the heat medium. The connector allows the reserve tank to come in communication with the heat medium circuits selectively. As such, an occurrence of the heat loss in the degassing performed in the reserve tank can be suppressed with the thermal management device for a vehicle including the heat medium circuits.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: November 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Norihiko Enomoto, Yoshiki Kato, Nobuyuki Hashimura, Kengo Sugimura, Koji Miura, Keigo Sato, Ariel Marasigan
  • Patent number: 10759257
    Abstract: A refrigeration cycle device includes a compressor, an air-refrigerant heat exchanger that exchanges heat between air and refrigerant, an expansion valve decompressing the refrigerant, a heat medium-refrigerant heat exchanger that exchanges heat between a heat medium and the refrigerant, a cold-heat utilization device that utilizes cold heat of the heat medium, and a hot-heat utilization device that utilizes hot heat of the heat medium. A refrigerant flow switching valve is provided to switch between a heat-medium cooling mode of cooling the heat medium in the heat medium-refrigerant heat exchanger, and a heat-medium heating mode of heating the heat medium in the heat medium-refrigerant heat exchanger.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: September 1, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yoshiki Katoh, Koji Miura, Kengo Sugimura, Masayuki Takeuchi, Keigo Satou, Norihiko Enomoto, Nobuyuki Hashimura
  • Patent number: 10723199
    Abstract: A vehicular heat management device includes a first heat source, a second heat source, a heater core, a first heat medium pathway, a second heat medium pathway, a heater core pathway, a switching portion, and a control unit. The first heat source is provided in the first heat medium pathway, and the second heat source is provided in the second heat medium pathway. The heater core is provided in the heater core pathway. The switching portion switches between flowing connection and flowing disconnection. The control unit performs at least one of a switching control and a second heat source control when a temperature of the heat medium of the heater core pathway is at or above a predetermined temperature. In the switching control, the switching portion connects the second heat medium pathway to the heater core pathway. In the second heat source control, the second heat source generates heat.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: July 28, 2020
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiki Kato, Masayuki Takeuchi, Keigo Sato, Koji Miura, Norihiko Enomoto, Kengo Sugimura, Ariel Marasigan, Ikuo Ozawa, Nobuharu Kakehashi, Yoshikazu Shinpo, Yoichi Onishi, Toshio Murata
  • Patent number: 10723203
    Abstract: A refrigeration cycle device includes: a first expansion valve that decompresses a refrigerant flowing out of a high-pressure side heat exchanger; an exterior heat exchanger that exchanges heat between the refrigerant flowing out of the first expansion valve and outside air; a second expansion valve that decompresses the refrigerant flowing out of the exterior heat exchanger; a low-pressure side heat exchanger arranged in series with the exterior heat exchanger; a cooler core that exchanges heat between the heat medium cooled by the low-pressure side heat exchanger and air to be blown into a vehicle interior to cool the air; and a controller configured to switch between a heat absorption mode and a heat dissipation mode by adjusting an amount of decompression in each of the first expansion valve and the second expansion valve.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 28, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yoshiki Kato, Nobuyuki Hashimura, Koji Miura, Norihiko Enomoto, Kengo Sugimura, Keigo Sato, Masayuki Takeuchi, Ariel Marasigan
  • Patent number: 10717341
    Abstract: A vehicular heat management system includes a heat medium circuit, a heat source portion, and a device. A heat medium cooling an engine circulates in the heat medium circuit. The heat source portion heats the heat medium. The device is configured to function and heat the heat medium when the heat medium flowing into the device is at or above a predetermined temperature. When the engine is being warmed up, heat generated by the heat source portion is supplied to the device in preference to the engine. According to this, since the heat generated by the heat source portion is supplied to the device in preference to the engine when the engine is being warmed up, the engine can be warmed up early.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 21, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kengo Sugimura, Yoshiki Kato, Masayuki Takeuchi, Keigo Sato, Koji Miura, Norihiko Enomoto, Ariel Marasigan, Nobuyuki Hashimura
  • Patent number: 10562371
    Abstract: An air conditioning system has a heat pump, a first-liquid-medium circuit in which a first liquid medium circulates, a second-liquid-medium circuit in which a second liquid medium circulates, a heat source, a connection switching device, and a controller. The connection switching device switches between a connection state in which the heat source is connected to the second-liquid-medium circuit and a disconnection state in which the heat source is disconnected from the second-liquid-medium circuit. The controller controls the connection switching device to switch between the connection state and the disconnection state based on a heat-related physical quantity relating to a heat of the first-liquid-medium circuit, a heat-related physical quantity a heat of the second-liquid-medium circuit, a heat-related physical quantity the heat generated by the heat source, or a heat-related physical quantity a heat of the heat pump.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 18, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kengo Sugimura, Yoshiki Katoh, Koji Miura
  • Patent number: 10562376
    Abstract: A refrigeration cycle device includes: a high-pressure side heat exchanger; a low-pressure side heat exchanger; a vehicle-mounted device that supplies heat to the heat medium; a heat-medium air heat exchanger that exchanges heat between the heat medium and air; a switching portion that switches between a state in which the heat medium circulates through the high-pressure side heat exchanger and a state in which the heat medium circulates through the low-pressure side heat exchanger with respect to each of the vehicle-mounted device and the heat-medium air heat exchanger; and a controller that drives the compressor, while controlling an operation of the switching portion to switch to a defrosting mode in which the heat medium circulates between the low-pressure side heat exchanger and the vehicle-mounted device, and the heat medium circulates between the high-pressure side heat exchanger and the heat-medium air heat exchanger, when defrosting of the heat-medium air heat exchanger is necessary.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: February 18, 2020
    Assignee: DENSO CORPORATION
    Inventors: Koji Miura, Yoshiki Kato, Kengo Sugimura
  • Patent number: 10500924
    Abstract: A thermal management device includes two or more heat dissipation devices that dissipate heat into a heat medium, a heat medium-air heat exchanger that exchanges heat between air and the heat medium having its heat dissipated in the two or more heat dissipation devices, a flow-rate adjustment device that adjusts a flow rate of the heat medium flowing through the heat dissipation device, and a control unit. The control unit controls an operation of the flow-rate adjustment device to increase the flow rate of the heat medium flowing through the one heat dissipation device, if the control unit estimates an increase in the amount of heat dissipation into the heat medium at the one heat dissipation device of the two or more heat dissipation devices.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: December 10, 2019
    Assignee: DENSO CORPORATION
    Inventors: Koji Miura, Yoshiki Katoh, Kengo Sugimura, Nobuharu Kakehashi
  • Patent number: 10449830
    Abstract: A vehicular heat management system includes: a refrigerant circuit; a first heat medium circuit in which a heat medium circulates and exchanges heat with a low-pressure side refrigerant of the refrigerant circuit; a second heat medium circuit in which a heat medium circulates and exchanges heat with a high-pressure side refrigerant of the refrigerant circuit; and a switching device configured to switch a mode between a communicating mode in which the first heat medium circuit and the second heat medium circuit are coupled and a non-communicating mode in which the first heat medium circuit and the second heat medium circuit are not coupled on the basis of a temperature of the heat medium in the first heat medium circuit.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: October 22, 2019
    Assignee: DENSO CORPORATION
    Inventors: Kengo Sugimura, Kazutoshi Kuwayama, Masamichi Makihara, Yoshiki Katoh, Norihiko Enomoto
  • Patent number: 10400662
    Abstract: A vehicular heat management device includes a first heat source, a second heat source, a first heat generator, a second heat generator, a heat generator pathway, a first heat source pathway, a second heat source pathway, and a switching portion. The first heat source and the second heat source heat a heat medium. The first heat generator generates heat according to operation. The second heat generator generates heat according to operation. The first heat generator and the second heat generator are provided in the heat generator pathway. The first heat generator is provided in the first heat generator pathway. The second heat generator is provided in the second heat generator pathway. The switching portion switches between a condition where the heat generator pathway is in flowing communication with the first heat generator pathway and a condition where the heat generator pathway is in flowing communication with the second heat generator pathway.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: September 3, 2019
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiko Enomoto, Yoshiki Kato, Masayuki Takeuchi, Koji Miura, Keigo Sato, Kengo Sugimura, Nobuharu Kakehashi, Ikuo Ozawa, Ariel Marasigan, Yoshikazu Shinpo, Yoichi Onishi, Toshio Murata
  • Patent number: 10371420
    Abstract: An air conditioning device for a vehicle having a compressor that supplies a high-pressure refrigerant, an air heating heat exchanger heating air that is to be blown into a vehicle cabin, a pressure reduction part expanding and decompressing the high-pressure refrigerant so as to supply an intermediate-pressure refrigerant and a low-pressure refrigerant, a first low-pressure side heat exchanger exchanging heat between the intermediate-pressure refrigerant and a heating medium other than the air, a second low-pressure side heat exchanger cooling the heating medium by exchanging heat between the low-pressure refrigerant and the heating medium, a first heating medium circuit through which the heating medium cooled in the second low-pressure side heat exchanger circulates, and a heating medium-air heat exchanger.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: August 6, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yoshiki Katoh, Masamichi Makihara, Kazutoshi Kuwayama, Norihiko Enomoto, Kengo Sugimura
  • Patent number: 10371419
    Abstract: A vehicle air conditioning apparatus includes: at least one processor programmed to control a flow rate of at least one of a heat medium and outside air flowing through a heat medium-to-outside air heat exchanger such that a temperature of blast air cooled in an air-cooling heat exchanger is adjusted toward a first target temperature, and to control a flow rate of a refrigerant discharged from a compressor such that a temperature of blast air, which has been adjusted in at least one of the air-cooling heat exchanger and an air-heating heat exchanger and which is blown out into a vehicle interior, is adjusted toward a second target temperature. Accordingly, a surface temperature of the air-cooling heat exchanger and the temperature of the blast air into the vehicle interior can be properly controlled.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: August 6, 2019
    Assignee: DENSO CORPORATION
    Inventors: Norihiko Enomoto, Nobuharu Kakehashi, Michio Nishikawa, Yoshiki Katoh, Kengo Sugimura, Takashi Yamanaka, Masamichi Makihara