Patents by Inventor Ryuuichi Toyota
Ryuuichi Toyota 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).
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Patent number: 11976831Abstract: A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.Type: GrantFiled: January 4, 2021Date of Patent: May 7, 2024Assignees: DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V.Inventors: Satoshi Kawano, Kyouji Araya, Kazuya Fukuda, Ryuuichi Toyota, Kazunari Fukagawa, Makoto Inoue, Natsuko Kitagawa
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Patent number: 11955739Abstract: A connection structure between a printed circuit board and a terminal block includes: an insertion portion at one end of the printed circuit board with a pattern disposed thereon; a terminal-block main body including a receiving port that receives the insertion portion; a nut held in the terminal-block main body; and a screw tightened into the nut. The pattern is interposed between the screw and the nut when the insertion portion is inserted into the receiving port.Type: GrantFiled: October 21, 2019Date of Patent: April 9, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Kazunari Fukagawa, Hironori Ogawa, Akihiko Oguri, Ryuuichi Toyota, Natsuko Kitagawa
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Patent number: 11949199Abstract: A terminal block includes: a first split body that includes one or more terminal connection parts and a first coupling portion; a second split body that includes one or more terminal connection parts and a second coupling portion coupled to the first coupling portion; and a coupling member that couples the first coupling portion to the second coupling portion and fixes the first split body and the second split body to a mount to which the terminal block is mounted.Type: GrantFiled: November 26, 2018Date of Patent: April 2, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Kazunari Fukagawa, Koushou Shouyama, Ryuuichi Toyota
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Patent number: 11879646Abstract: An air conditioner includes a power source that supplies AC voltage and a wiring plug-in coupler connected to the power source. The wiring plug-in coupler is connected to a portion of the power source to which a first functional component, which is actuated by the AC voltage in cooperation with the air conditioner, is connected, supplies voltage to a second functional component actuated by DC voltage in cooperation with the air conditioner, and is connected with an input terminal of a converter that converts AC voltage to DC voltage and supplies the converted DC voltage to the second functional component.Type: GrantFiled: July 6, 2023Date of Patent: January 23, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Kazunari Fukagawa, Ryuuichi Toyota, Natsuko Kitagawa, Yuuki Takami, Yumi Aomatsu
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Patent number: 11841256Abstract: A thermal flow velocity and flow rate sensor includes: a substrate; a heater mounted on the substrate; a temperature measuring element mounted on the substrate; a joint portion made of a resin filled between the heater and the temperature measuring element and thermally connecting the heater and the temperature measuring element; a lead wire connected to the substrate; and a fastener fixing the lead wire to the substrate. The lead wire is soldered to the substrate. The lead wire and the fastener are coated with the resin.Type: GrantFiled: April 14, 2023Date of Patent: December 12, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yuuki Takami, Kazunari Fukagawa, Ryuuichi Toyota, Natsuko Kitagawa, Yumi Aomatsu
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Publication number: 20230349584Abstract: An air conditioner includes a power source that supplies AC voltage and a wiring plug-in coupler connected to the power source. The wiring plug-in coupler is connected to a portion of the power source to which a first functional component, which is actuated by the AC voltage in cooperation with the air conditioner, is connected, supplies voltage to a second functional component actuated by DC voltage in cooperation with the air conditioner, and is connected with an input terminal of a converter that converts AC voltage to DC voltage and supplies the converted DC voltage to the second functional component.Type: ApplicationFiled: July 6, 2023Publication date: November 2, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kazunari Fukagawa, Ryuuichi Toyota, Natsuko Kitagawa, Yuuki Takami, Yumi Aomatsu
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Publication number: 20230314195Abstract: A thermal flow velocity and flow rate sensor includes: a substrate; a heater mounted on the substrate; a temperature measuring element mounted on the substrate; a joint portion made of a resin filled between the heater and the temperature measuring element and thermally connecting the heater and the temperature measuring element; a lead wire connected to the substrate; and a fastener fixing the lead wire to the substrate. The lead wire is soldered to the substrate. The lead wire and the fastener are coated with the resin.Type: ApplicationFiled: April 14, 2023Publication date: October 5, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuuki Takami, Kazunari Fukagawa, Ryuuichi Toyota, Natsuko Kitagawa, Yumi Aomatsu
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Publication number: 20230107694Abstract: A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.Type: ApplicationFiled: January 4, 2021Publication date: April 6, 2023Applicants: DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V.Inventors: Satoshi KAWANO, Kyouji ARAYA, Kazuya FUKUDA, Ryuuichi TOYOTA, Kazunari FUKAGAWA, Makoto INOUE, Natsuko KITAGAWA
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Publication number: 20230052745Abstract: A refrigerant cycle apparatus includes a refrigerant circuit that circulates a refrigerant, and a leak sensor that detects a refrigerant leaking from the refrigerant circuit, in which the refrigerant cycle apparatus includes, as an operating mode, a recovery mode for recognizing occurrence of an abnormality in the leak sensor and recovering a refrigerant to a predetermined location in the refrigerant circuit.Type: ApplicationFiled: October 26, 2022Publication date: February 16, 2023Applicants: DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V.Inventors: Natsuko KITAGAWA, Ryuuichi TOYOTA, Kazunari FUKAGAWA, Keiya NAGAHARA, Satoshi KAWANO, Makoto INOUE, Kevin CORNELIS
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Publication number: 20220390160Abstract: A heat pump device having a refrigerant circuit includes: a valve configured to maintain an opening degree during non-energization; a valve drive circuit configured to cause operation of the valve; a valve controller configured to control the valve drive circuit; and a power source circuit configured to supply a power source to the valve drive circuit. The power source circuit includes: a first power source circuit unit configured to receive power source supply from outside to generate a DC: voltage; and a second power source circuit unit for backup. The second power source circuit unit receives power source supply from the outside to store power in a capacitor, and connects the capacitor in parallel to a first output electric path of the first power source circuit unit.Type: ApplicationFiled: September 8, 2020Publication date: December 8, 2022Applicants: DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V.Inventors: Yuusuke FUJIMOTO, Ryuuichi TOYOTA, Kentaroh TAOKA, Atsushi OHTANI, Kevin CORNELIS, David STEEN
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Publication number: 20220037814Abstract: A connection structure between a printed circuit board and a terminal block includes: an insertion portion at one end of the printed circuit board with a pattern disposed thereon; a terminal-block main body including a receiving port that receives the insertion portion; a nut held in the terminal-block main body; and a screw tightened into the nut. The pattern is interposed between the screw and the nut when the insertion portion is inserted into the receiving port.Type: ApplicationFiled: October 21, 2019Publication date: February 3, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kazunari Fukagawa, Hironori Ogawa, Akihiko Oguri, Ryuuichi Toyota, Natsuko Kitagawa
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Publication number: 20210167528Abstract: A terminal block includes: a first split body that includes one or more terminal connection parts and a first coupling portion; a second split body that includes one or more terminal connection parts and a second coupling portion coupled to the first coupling portion; and a coupling member that couples the first coupling portion to the second coupling portion and fixes the first split body and the second split body to a mount to which the terminal block is mounted.Type: ApplicationFiled: November 26, 2018Publication date: June 3, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kazunari Fukagawa, Koushou Shouyama, Ryuuichi Toyota