Patents by Inventor Masahiro Oka

Masahiro Oka 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: 20200033036
    Abstract: In a refrigeration apparatus including a refrigerant circuit in which a refrigerant in a gas-liquid two-phase state flows through a liquid-side connection pipe, a refrigerant-amount determining method and a refrigerant-amount determining device capable of grasping an appropriate refrigerant charging amount corresponding to the length of the connection pipe is provided.
    Type: Application
    Filed: September 29, 2017
    Publication date: January 30, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro YAMADA, Yuusuke NAKAGAWA, Masahiro HONDA, Yuusuke OKA, Hiroki SASAYAMA
  • Patent number: 10480837
    Abstract: A refrigeration apparatus includes a compressor, a heat-source-side heat exchanger operable as a refrigerant evaporator or radiator, and a usage-side heat exchanger operable as a refrigerant evaporator or radiator. The heat-source-side heat exchanger is disposed inside a heat source unit having an exhaust port and an outdoor fan in an upper part, and an intake port in a side part. The heat-source-side heat exchanger includes first and second heat-source-side heat exchangers. Adjustable first and second heat-source-side flow rate adjusting valves are connected to liquid sides of the first and second heat-source-side heat exchangers, respectively. In a defrost operation in order to defrost the first and second heat-source-side heat exchangers, the opening degrees of the first and second heat-source-side flow rate adjusting valves are controlled so as to achieve a defrost flow rate ratio at which more refrigerant flows to the second heat-source-side heat exchanger than during an air-cooling operation.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: November 19, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Junya Minami, Masahiro Oka
  • Publication number: 20190338986
    Abstract: To reduce noise coming from an indoor unit in an air conditioning apparatus that has an outdoor unit that has a compressor and an outdoor heat exchanger, the indoor unit that has an indoor heat exchanger, and a liquid refrigerant connection pipe and a gas refrigerant connection pipe that interconnect both units and in which a liquid pressure adjusting expansion valve that reduces a pressure of a refrigerant flowing through the liquid refrigerant connection pipe in such a way that the refrigerant is in a gas-liquid two-phase state is provided in an outdoor liquid refrigerant pipe that interconnects the liquid-side end of the outdoor heat exchanger and the liquid refrigerant connection pipe. An external expansion valve unit having an external expansion valve that further reduces the pressure of the refrigerant whose pressure has been reduced in the liquid pressure adjusting expansion valve is provided in the outdoor liquid refrigerant pipe.
    Type: Application
    Filed: September 26, 2017
    Publication date: November 7, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro YAMADA, Masahiro HONDA, Yuusuke NAKAGAWA, Yuusuke OKA
  • Patent number: 10443869
    Abstract: Operation switching units, each changing directions of a refrigerant flowing through its associated indoor unit in response to a switch from a cooling operation to a heating operation, or vice versa, are each connected with the associated indoor unit through indoor communication pipes; a gas-liquid separation unit is connected with an outdoor unit through outdoor communication pipes; and the operation switching units are connected with the gas-liquid separation unit through two intermediate communication pipes preinstalled and one intermediate communication pipe newly installed. This provides a simple and cost-effective means for upgrading a preinstalled air conditioner making a switch from cooling to heating, and vice versa, into an air conditioner that can perform a cooling operation and a heating operation in parallel with each other.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: October 15, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Kawano, Shinya Matsuoka, Masahiro Oka, Mari Susaki
  • Publication number: 20190301019
    Abstract: There is provided a boron-based film forming method for forming a boron-based film mainly containing boron on a substrate. The method includes steps of loading a substrate into a chamber of a film forming apparatus for forming the boron-based film by plasma CVD using capacitively-coupled plasma, supplying a processing gas containing a boron-containing gas into the chamber, applying a high frequency power for generating the capacitively-coupled plasma and forming the boron-based film on the substrate by generating a plasma of the processing gas by the high frequency power. A film stress of the boron-based film is adjusted by the high frequency power in the applying step.
    Type: Application
    Filed: March 25, 2019
    Publication date: October 3, 2019
    Inventors: Yoshimasa WATANABE, Masahiro OKA, Jinwang LI, Yuuki YAMAMOTO, Hirokazu UEDA
  • Patent number: 10388524
    Abstract: There is provided a method of forming a boron film on a substrate on which a semiconductor device is formed, by plasmarizing a reaction gas containing a boron-containing gas under a process atmosphere regulated to a pressure which falls within a range of 0.67 to 33.3 Pa (5 to 250 mTorr). The boron film is formed on a substrate on which a semiconductor device is formed, by plasmarizing a reaction gas containing a boron-containing gas under a process atmosphere regulated to a pressure which falls within a range of 0.67 to 33.3 Pa (5 to 250 mTorr).
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: August 20, 2019
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Hirokazu Ueda, Masahiro Oka, Hiraku Ishikawa, Yoshimasa Watanabe, Syuhei Yonezawa
  • Publication number: 20190249912
    Abstract: An air conditioner includes: liquid-side indoor expansion valves corresponding to a liquid side of respective indoor heat exchangers; and gas-side indoor expansion valves corresponding to a gas side of the respective indoor heat exchangers. In a case where both a heating-operation indoor heat exchanger and a heating-stopped indoor heat exchanger are present, the controller of the air conditioner controls the liquid-side indoor expansion valve and the gas-side indoor expansion valve corresponding to the heating-stopped indoor heat exchanger such that an opening degree of the gas-side indoor expansion valve becomes smaller than an opening degree of the liquid-side indoor expansion valve.
    Type: Application
    Filed: September 29, 2017
    Publication date: August 15, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro YAMADA, Yuusuke NAKAGAWA, Masahiro HONDA, Yuusuke OKA
  • Publication number: 20190244838
    Abstract: A method of forming a boron-based film includes forming the boron-based film mainly containing boron on a substrate by plasma CVD using plasma of a processing gas including a boron-containing gas; and controlling film stress of the formed boron-based film by adjusting a process parameter.
    Type: Application
    Filed: January 31, 2019
    Publication date: August 8, 2019
    Inventors: Yoshimasa WATANABE, Masahiro OKA, Hirokazu UEDA, Yuuki YAMAMOTO
  • Publication number: 20190234660
    Abstract: An air conditioning system, which is a refrigeration apparatus that performs a refrigeration cycle in a refrigerant circuit, includes an outdoor heat exchanger, an indoor heat exchanger, a first control valve, a second control valve, a third control valve, and a pressure adjusting portion. The first control valve and the second control valve, which block flow of refrigerant when fully closed, are disposed in a gas-side refrigerant flow path. The gas-side refrigerant flow path is disposed between the outdoor heat exchanger and the indoor heat exchanger. The third control valve, which blocks flow of refrigerant when fully closed, is disposed in a liquid-side refrigerant flow path. The liquid-side refrigerant flow path is disposed between the outdoor heat exchanger and the indoor heat exchanger. The pressure adjusting portion adjusts the pressure of refrigerant in an indoor-side refrigerant flow path.
    Type: Application
    Filed: September 29, 2017
    Publication date: August 1, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro YAMADA, Yuusuke NAKAGAWA, Yuusuke OKA, Masahiro HONDA
  • Publication number: 20190234643
    Abstract: An air conditioner, in which a liquid-pressure adjustment expansion valve that decompresses a refrigerant so that the refrigerant flowing through a liquid-refrigerant connection pipe is in a gas-liquid two-phase state is provided in an outdoor liquid-refrigerant pipe that connects a liquid-side end of an outdoor heat exchanger to the liquid-refrigerant connection pipe, properly transports the refrigerant in a two-phase state while suppressing an increase in a discharge temperature of a compressor. A liquid injection pipe that branches part of a refrigerant flowing through an outdoor liquid-refrigerant pipe and feeds the branched refrigerant to a compressor is connected to a portion of the outdoor liquid-refrigerant pipe on a side of an outdoor heat exchanger with respect to a liquid-pressure adjustment expansion valve.
    Type: Application
    Filed: September 26, 2017
    Publication date: August 1, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro YAMADA, Yuusuke NAKAGAWA, Masahiro HONDA, Yuusuke OKA
  • Publication number: 20190226707
    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: Application
    Filed: January 17, 2019
    Publication date: July 25, 2019
    Inventors: Masahiro Oka, Junichi Shimoda, Takashi Shimamura, Yuuji Yamada, Hideyuki Nakagawa, Hiroyuki Imada, David Palazzolo, Joseph Kelly Hearnsberger, Sriram Venkat, Chris Bellshaw, John Clements
  • Publication number: 20190212042
    Abstract: Noise that is generated from an indoor unit is suppressed when performing two-phase transport of refrigerant by using a liquid-pressure-adjusting expansion valve in an air conditioner including an outdoor unit, a plurality of indoor units each including an indoor heat exchanger, a relay unit that switches the plurality of indoor heat exchangers so that the indoor heat exchangers individually function as an evaporator or radiator for refrigerant, and a liquid-refrigerant connection pipe and a gas-refrigerant connection pipe that connect the outdoor unit and the indoor unit via the relay unit. The relay unit includes a relay expansion valve that further decompresses the refrigerant that has been decompressed by the liquid-pressure-adjusting expansion valve.
    Type: Application
    Filed: September 26, 2017
    Publication date: July 11, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro YAMADA, Yuusuke NAKAGAWA, Yuusuke OKA, Masahiro HONDA
  • Patent number: 10267540
    Abstract: A heat source unit includes a compressor, first and second heat exchangers connected in parallel, first and second motor-operated valves regulating amounts of refrigerant that flow to the first and second heat exchangers, first and second temperature sensors measuring temperatures of refrigerant flowing from the first and second motor-operated valve to the first and second heat exchangers, a discharge temperature sensor measuring temperature of refrigerant discharged from the compressor, and a valve opening controller. The controller regulates valve openings of the first and second motor-operated valves based on the discharge temperature, refrigerant temperature detected by the first temperature sensor and refrigerant temperature detected by the second temperature sensor.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: April 23, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Junya Minami, Masahiro Oka, Mari Susaki
  • Patent number: 10197321
    Abstract: An air conditioning apparatus uses R32 as a refrigerant, and includes a compressor, a condenser, an expansion mechanism, an evaporator, an intermediate injection channel, a suction injection channel, a switching mechanism, a branch flow channel, first and second injection opening adjustable valves, an injection heat exchanger, a refrigerant storage tank, a bypass channel, and a control part. The switching mechanism switches between an intermediate injection condition in which refrigerant flows in the intermediate injection channel, and a suction injection condition in which refrigerant flows in the suction injection channel. The branch flow channel branches from a main refrigerant channel which joins the condenser and the evaporator, and guides the refrigerant to the intermediate injection channel and the suction injection channel.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: February 5, 2019
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Kawano, Shinya Matsuoka, Masahiro Oka
  • Patent number: 10184676
    Abstract: Operation switching units, each changing directions of a refrigerant flowing through its associated indoor unit in response to a switch from a cooling operation to a heating operation, or vice versa, are each connected with the associated indoor unit through indoor communication pipes; a gas-liquid separation unit is connected with an outdoor unit through outdoor communication pipes; and the operation switching units are connected with the gas-liquid separation unit through two intermediate communication pipes preinstalled and one intermediate communication pipe newly installed. This provides a simple and cost-effective means for upgrading a preinstalled air conditioner making a switch from cooling to heating, and vice versa, into an air conditioner that can perform a cooling operation and a heating operation in parallel with each other.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: January 22, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Satoshi Kawano, Shinya Matsuoka, Masahiro Oka, Mari Susaki
  • Publication number: 20180350598
    Abstract: In a method for removing a boron film formed on a substrate by CVD, heat treatment is performed on a part or all boron film in an oxidizing atmosphere and oxidizing a heat-treated portion. Then, an oxidized portion of the boron film is removed by water or aqueous solution containing electrolyte ions.
    Type: Application
    Filed: June 4, 2018
    Publication date: December 6, 2018
    Inventors: Yoshimasa WATANABE, Masahiro OKA, Hirokazu UEDA
  • Publication number: 20180174838
    Abstract: There is provided a method of forming a boron film on a substrate on which a semiconductor device is formed, by plasmarizing a reaction gas containing a boron-containing gas under a process atmosphere regulated to a pressure which falls within a range of 0.67 to 33.3 Pa (5 to 250 mTorr). The boron film is formed on a substrate on which a semiconductor device is formed, by plasmarizing a reaction gas containing a boron-containing gas under a process atmosphere regulated to a pressure which falls within a range of 0.67 to 33.3 Pa (5 to 250 mTorr).
    Type: Application
    Filed: December 6, 2017
    Publication date: June 21, 2018
    Inventors: Hirokazu UEDA, Masahiro OKA, Hiraku ISHIKAWA, Yoshimasa WATANABE, Syuhei YONEZAWA
  • Patent number: 9995517
    Abstract: An operation control apparatus of air-conditioning apparatus having an outdoor unit and an indoor unit includes a controller programmed to execute energy conservation control of the air conditioning apparatus. The controller includes at least one required temperature calculation part calculating a required evaporation temperature or a required condensation temperature based on either a current amount of heat exchanged in a usage-side heat exchanger of the indoor unit and a greater amount of heat exchanged in the usage-side heat exchanger than the current amount, or an operating state amount that yields the current amount of heat exchanged in the usage-side heat exchanger and an operating state amount that yields the greater amount of heat exchanged in the usage-side heat exchanger than the current amount.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: June 12, 2018
    Assignee: Daikin Industries, Ltd.
    Inventors: Kousuke Kibo, Kazuhiko Tani, Masahiro Oka, Shinichi Kasahara, Yasuyuki Aisaka, Shingo Ohnishi
  • Patent number: 9958191
    Abstract: A refrigeration apparatus uses R32 as a refrigerant, and includes a compressor, a condenser, an expansion mechanism, an evaporator, an intermediate injection channel and a suction injection channel. The intermediate injection channel guides a part of the refrigerant flowing from the condenser toward the evaporator to the compressor, causing the refrigerant to merge with intermediate-pressure refrigerant of the compressor. The suction injection channel guides a part of the refrigerant flowing from the condenser toward the evaporator to the suction passage, causing the refrigerant to merge with low-pressure refrigerant sucked into the compressor.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: May 1, 2018
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Kawano, Shinya Matsuoka, Masahiro Oka
  • Patent number: 9939180
    Abstract: In a refrigeration apparatus, in a first operation mode, a comparison is made between a first liquid pipe temperature, which is a temperature of a refrigerant on a side of a liquid pipe heat exchanger that is near usage-side heat exchangers, and a second liquid pipe temperature, which is a temperature of the refrigerant on a side of the liquid pipe heat exchanger that is near a plurality of heat-source-side heat exchangers, the liquid pipe heat exchanger performing heat exchange with the refrigerant flowing through liquid sides of the heat-source-side heat exchangers. When an evaporation-switch liquid pipe temperature condition is satisfied, the heat-source-side heat exchanger functioning as a radiator of the refrigerant is switched to an evaporator of the refrigerant, and the first operation mode is switched to a second operation mode in which the plurality of heat-source-side heat exchangers are caused to function as evaporators of the refrigerant.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: April 10, 2018
    Assignee: Daikin Industries, Ltd.
    Inventors: Mari Susaki, Masahiro Oka, Ryuuta Ohura