Patents by Inventor Naotoshi Fujita

Naotoshi Fujita 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).

  • Publication number: 20250044003
    Abstract: A ventilation apparatus includes a compressor; a first heat exchanger configured to function as a condenser or an evaporator; a first air flow path configured to supply air taken in from outdoors to an indoor space after passing through the first heat exchanger; a second heat exchanger configured to function as a condenser or an evaporator; a second air flow path configured to exhaust air taken in from the indoor space to the outdoors after passing through the second heat exchanger; a refrigerant circuit through which a refrigerant flows, the refrigerant circuit being connected to the compressor, the first heat exchanger, and the second heat exchanger by a refrigerant pipe; and a control unit configured to guide a flow of air in the indoor space to the second heat exchanger when the second heat exchanger is determined to be in a frosted state, to increase a temperature of the second heat exchanger, and configured to output a predetermined instruction to an actuator configured to control a state of the refrige
    Type: Application
    Filed: December 8, 2022
    Publication date: February 6, 2025
    Inventors: Shota TSURUZONO, Takashi TAKAHASHI, Tsunahiro ODO, Nobuki MATSUI, Yoshiki YAMANOI, Naotoshi FUJITA, Takuya HANADA, Yuta IYOSHI, Kumiko SAEKI, Takeru MIYAZAKI, Toshiyuki MAEDA, Tetsuya OKAMOTO
  • Publication number: 20240337401
    Abstract: A ventilation apparatus includes a processor; a compressor; a first heat exchanger; a first air flow path configured to supply air from outdoors to an indoor space after passing through the first heat exchanger; a second heat exchanger; a second air flow path configured to exhaust air from the indoor space to the outdoors after passing through the second heat exchanger; and a refrigerant circuit through which a refrigerant flows, the refrigerant circuit being connected to the compressor, and the first and second heat exchangers. The processor detects whether a predetermined reference indicating a possibility of frosting in the second heat exchanger is satisfied while the second heat exchanger is functioning as an evaporator, and controls a temperature of the refrigerant flowing through the second heat exchanger such that the second heat exchanger will have a temperature at which frosting does not occur, when the predetermined reference is satisfied.
    Type: Application
    Filed: June 14, 2024
    Publication date: October 10, 2024
    Inventors: Takashi TAKAHASHI, Tsunahiro ODO, Shota TSURUZONO, Nobuki MATSUI, Takuya HANADA, Naotoshi FUJITA, Yoshiki YAMANOI, Yuta IYOSHI, Kumiko SAEKI, Takeru MIYAZAKI, Toshiyuki MAEDA, Tetsuya OKAMOTO
  • Publication number: 20240328658
    Abstract: The air-conditioning system according to an embodiment is provided with a ventilation device, an air-conditioner, a processor, and a memory storing one or more programs, which when executed, cause the processor to control the ventilation device and the air-conditioner. The processor stores a first capability indicating a heat load that can be output corresponding to the power consumption of the ventilation device and a second capability indicating a heat load that can be output corresponding to the power consumption of the air conditioner, acquires the temperature of an indoor space, and sets the ventilation device and the air conditioner to share the first heat load that needs to be adjusted in the indoor space calculated based on the temperature of the indoor space according to the first capability and the second capability.
    Type: Application
    Filed: June 11, 2024
    Publication date: October 3, 2024
    Inventors: Tsunahiro ODO, Takashi TAKAHASHI, Shota TSURUZONO, Takuya HANADA, Naotoshi FUJITA, Yoshiki YAMANOI, Yuta IYOSHI, Kumiko SAEKI, Takeru MIYAZAKI, Nobuki MATSUI, Toshiyuki MAEDA, Tetsuya OKAMOTO
  • Patent number: 11959652
    Abstract: A machine learning apparatus for optimizing transfer of heat quantity is provided.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: April 16, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Naotoshi Fujita, Hiroshi Nakayama, Yasunori Okamoto
  • Publication number: 20230284172
    Abstract: An estimation system estimates the arrangement of objects. The estimation system includes an estimation unit. The estimation unit obtains information related to an arrangement pattern of the objects as first information and obtains, from wireless devices respectively connected to the objects, information including response times between the wireless devices as second information to estimate the arrangement of the objects based on the first information and the second information.
    Type: Application
    Filed: July 21, 2021
    Publication date: September 7, 2023
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hiroshi DOUMAE, Shin HIGASHIYAMA, Takuya HANADA, Hiroki UEDA, Hiroshi NAKAYAMA, Naotoshi FUJITA, Yuusuke ASADA
  • Patent number: 11698203
    Abstract: In an air-conditioning system including an outside air processing device and an air-conditioning device, an operation of either one of the outside air processing device or the air-conditioning device is stopped if a temperature/humidity state that is at least either the temperature or humidity of air in a target space is within a predetermined range and if the load factor of at least one of the outside air processing device or the air-conditioning device is below a predetermined lower limit.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: July 11, 2023
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori Okamoto, Naotoshi Fujita, Kouji Tatsumi, Masaaki Kawagishi, Shinya Umase
  • Patent number: 11473791
    Abstract: Disclosed is a humidity control apparatus which ensures a sufficient dehumidification amount without increasing an area of a gas-liquid contact portion in a dehumidification unit, regardless of the type of liquid absorbent used. The humidity control apparatus includes an absorbent circuit connecting a liquid-based dehumidification module, a recovery module, and a liquid-cooling heat exchanger which cools, with a refrigerant, a liquid absorbent before being used in the liquid-based dehumidification module. A refrigerant-cooling-based dehumidification module is positioned upstream of the liquid-based dehumidification module in a flow direction of target air, and cools and dehumidifies, with the refrigerant, the target air before being dehumidified in the module. The liquid-cooling heat exchanger and the refrigerant-cooling-based dehumidification module are connected to a single refrigerant circuit together with a liquid-heating heat exchanger.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: October 18, 2022
    Assignee: DAIKIN INDUSTRIES, LTD
    Inventors: Naotoshi Fujita, Eisaku Okubo, Nobuki Matsui, Yoshinori Narikawa
  • Patent number: 11428422
    Abstract: When an outdoor air handler performs a heating humidifying operation and an air conditioner performs a cooling operation, a control device adjusts at least one of a to-be-supplied air temperature of the outdoor air handler, a to-be-supplied air flow rate of the outdoor air handler, a to-be-supplied water flow rate of the outdoor air handler, and a cooling temperature that is a temperature at an air heat exchanger of the air conditioner. The control device adjusts the to-be-supplied air temperature and the cooling temperature on the basis of dehumidification information, operation information, temperature information, and humidity information. The operation information is information regarding an operating state of the air conditioner.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: August 30, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori Okamoto, Naotoshi Fujita, Kouji Tatsumi, Masaaki Kawagishi, Shinya Umase
  • Patent number: 11402118
    Abstract: It is an object of the present disclosure to collectively control an outdoor air handler and an air conditioner optimally. An air-conditioning system (100) includes an outdoor air handler (10) configured to adjust a temperature and a humidity of taken-in outdoor air and supply the air to a target space (SP1, SP2), an air conditioner (20) configured to adjust a temperature of air in the target space (SP1, SP2), and a control unit (30). The control unit (30) is configured to, in a case where one of the outdoor air handler (10) and the air conditioner (20) is in a non-temperature adjusting state in which the temperature of the air is not adjusted, change an air conditioning capacity of the other one of the outdoor air handler (10) and the air conditioner (20) compared with a case where the outdoor air handler (10) and the air conditioner (20) are in a temperature adjusting state in which the temperature of the air is adjusted.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: August 2, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori Okamoto, Naotoshi Fujita, Kouji Tatsumi, Masaaki Kawagishi, Shinya Umase
  • Publication number: 20220205661
    Abstract: A machine learning apparatus for optimizing transfer of heat quantity is provided.
    Type: Application
    Filed: April 24, 2020
    Publication date: June 30, 2022
    Inventors: Naotoshi FUJITA, Hiroshi NAKAYAMA, Yasunori OKAMOTO
  • Patent number: 11313577
    Abstract: An air-conditioning system includes an outside air conditioning device, an air conditioning device, and a machine learning apparatus, and includes a state variable acquiring unit configured to acquire state variables, a learning unit configured to perform learning by associating the state variables with at least either an operating capacity of the outside air conditioning device or an operating capacity of the air conditioning device, and a reward calculating unit configured to calculate a reward that correlates with a total of energy consumption of the outside air conditioning device and energy consumption of the air conditioning device. The learning unit performs the learning by using the reward calculated in a period determined in accordance with a time duration until the total of the energy consumption changes after at least either the operating capacity of the outside air conditioning device or the operating capacity of the air conditioning device has changed.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: April 26, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori Okamoto, Naotoshi Fujita
  • Publication number: 20220107109
    Abstract: An air-conditioning system includes an outside air processing device, an air-conditioning device, and a control unit. The outside air processing device adjusts the temperature of outside air taken thereinto, and supplies the outside air to a plurality of indoor spaces. The air-conditioning device includes a plurality of indoor units at least one of which is installed in each of a plurality of target spaces that are some or all of the indoor spaces. The air-conditioning device adjusts the temperatures of air in the target spaces. The control unit adjusts the flow rate of air blown into each target space by the outside air processing device in accordance with an operating state of the at least one of the indoor units to reduce power consumption of the air-conditioning system.
    Type: Application
    Filed: December 17, 2021
    Publication date: April 7, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventor: Naotoshi FUJITA
  • Publication number: 20220107098
    Abstract: When an outdoor air handler performs a heating humidifying operation and an air conditioner performs a cooling operation, a control device adjusts at least one of a to-be-supplied air temperature of the outdoor air handler, a to-be-supplied air flow rate of the outdoor air handler, a to-be-supplied water flow rate of the outdoor air handler, and a cooling temperature that is a temperature at an air heat exchanger of the air conditioner. The control device adjusts the to-be-supplied air temperature and the cooling temperature on the basis of dehumidification information, operation information, temperature information, and humidity information. The operation information is information regarding an operating state of the air conditioner.
    Type: Application
    Filed: December 17, 2021
    Publication date: April 7, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori OKAMOTO, Naotoshi FUJITA, Kouji TATSUMI, Masaaki KAWAGISHI, Shinya UMASE
  • Publication number: 20220099325
    Abstract: An air-conditioning system that optimizes operation capacity of an outside air conditioning unit and operation capacity of an air conditioning unit is provided.
    Type: Application
    Filed: April 17, 2020
    Publication date: March 31, 2022
    Inventors: Yasunori OKAMOTO, Naotoshi FUJITA
  • Publication number: 20220090813
    Abstract: An outside air processing device adjusts the temperature and humidity of outside air taken thereinto, and then supplies the adjusted air to a target space. The outside air processing device includes a heating element configured to heat air, a humidifying element configured to humidify air that has passed through the heating element, and a control unit for outside air processing configured to change the temperature of air at an inlet of the humidifying element in accordance with the humidity in the target space.
    Type: Application
    Filed: December 2, 2021
    Publication date: March 24, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventor: Naotoshi FUJITA
  • Publication number: 20220082289
    Abstract: It is an object of the present disclosure to collectively control an outdoor air handler and an air conditioner optimally. An air-conditioning system (100) includes an outdoor air handler (10) configured to adjust a temperature and a humidity of taken-in outdoor air and supply the air to a target space (SP1, SP2), an air conditioner (20) configured to adjust a temperature of air in the target space (SP1, SP2), and a control unit (30). The control unit (30) is configured to, in a case where one of the outdoor air handler (10) and the air conditioner (20) is in a non-temperature adjusting state in which the temperature of the air is not adjusted, change an air conditioning capacity of the other one of the outdoor air handler (10) and the air conditioner (20) compared with a case where the outdoor air handler (10) and the air conditioner (20) are in a temperature adjusting state in which the temperature of the air is adjusted.
    Type: Application
    Filed: November 29, 2021
    Publication date: March 17, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori OKAMOTO, Naotoshi FUJITA, Kouji TATSUMI, Masaaki KAWAGISHI, Shinya UMASE
  • Publication number: 20220042702
    Abstract: In an air-conditioning system including an outside air processing device and an air-conditioning device, an operation of either one of the outside air processing device or the air-conditioning device is stopped if a temperature/humidity state that is at least either the temperature or humidity of air in a target space is within a predetermined range and if the load factor of at least one of the outside air processing device or the air-conditioning device is below a predetermined lower limit.
    Type: Application
    Filed: October 13, 2021
    Publication date: February 10, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasunori OKAMOTO, Naotoshi FUJITA, Kouji TATSUMI, Masaaki KAWAGISHI, Shinya UMASE
  • Patent number: 10989429
    Abstract: Provided is an air conditioning system that achieves energy conservation and comfortableness. In the air conditioning system (100), an outdoor-air conditioner (10) sucks outdoor-air (OA) and supplies the outdoor-air as supply air (SA) from an air handling unit (30). An indoor-air conditioner (50) cools or heats indoor-air (IA) that is an air inside a target space (SP) by using an indoor unit (70) and supplies the air to the target space (SP). A general control unit (90) controls performs cooperative load control in which an operating capacity of the outdoor-air conditioner (10) and an operating capacity of the indoor-air conditioner (50) are controlled in cooperation in accordance with a status of the outdoor-air (OA), a status of the indoor-air (IA), an operation status of the outdoor-air conditioner (10), and/or an operation status of the indoor-air conditioner (50).
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: April 27, 2021
    Assignee: Daikin Industries, Ltd.
    Inventors: Yasunori Okamoto, Naotoshi Fujita, Kouji Tatsumi, Masaaki Kawagishi
  • Publication number: 20200080742
    Abstract: Provided is an air conditioning system that achieves energy conservation and comfortableness. In the air conditioning system (100), an outdoor-air conditioner (10) sucks outdoor-air (OA) and supplies the outdoor-air as supply air (SA) from an air handling unit (30). An indoor-air conditioner (50) cools or heats indoor-air (IA) that is an air inside a target space (SP) by using an indoor unit (70) and supplies the air to the target space (SP). A general control unit (90) controls performs cooperative load control in which an operating capacity of the outdoor-air conditioner (10) and an operating capacity of the indoor-air conditioner (50) are controlled in cooperation in accordance with a status of the outdoor-air (OA), a status of the indoor-air (IA), an operation status of the outdoor-air conditioner (10), and/or an operation status of the indoor-air conditioner (50).
    Type: Application
    Filed: March 30, 2018
    Publication date: March 12, 2020
    Inventors: Yasunori OKAMOTO, Naotoshi FUJITA, Kouji TATSUMI, Masaaki KAWAGISHI
  • Publication number: 20190309964
    Abstract: Disclosed is a humidity control apparatus which ensures a sufficient dehumidification amount without increasing an area of a gas-liquid contact portion in a dehumidification unit, regardless of the type of liquid absorbent used. The humidity control apparatus includes an absorbent circuit connecting a liquid-based dehumidification module, a recovery module, and a liquid-cooling heat exchanger which cools, with a refrigerant, a liquid absorbent before being used in the liquid-based dehumidification module. A refrigerant-cooling-based dehumidification module is positioned upstream of the liquid-based dehumidification module in a flow direction of target air, and cools and dehumidifies, with the refrigerant, the target air before being dehumidified in the module. The liquid-cooling heat exchanger and the refrigerant-cooling-based dehumidification module are connected to a single refrigerant circuit together with a liquid-heating heat exchanger.
    Type: Application
    Filed: January 26, 2018
    Publication date: October 10, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Naotoshi FUJITA, Eisaku OKUBO, Nobuki MATSUI, Yoshinori NARIKAWA