Patents by Inventor Kazuhiro Furusho
Kazuhiro Furusho 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: 11976851Abstract: A refrigeration cycle device that includes a main refrigerant circuit and a sub-refrigerant circuit cools or heats a main refrigerant that flows between a main heat-source-side heat exchanger and a main usage-side heat exchanger by causing a sub-usage-side heat exchanger to function as an evaporator or a radiator of a sub-refrigerant. A first main expansion mechanism and a second main expansion mechanism that decompress the main refrigerant are provided on an upstream side and a downstream side of the sub-usage-side heat exchanger of the main refrigerant circuit.Type: GrantFiled: September 30, 2019Date of Patent: May 7, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Ikuhiro Iwata, Eiji Kumakura, Kazuhiro Furusho, Ryusuke Fujiyoshi, Hiromune Matsuoka
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Patent number: 11971037Abstract: In a compressor compressing a refrigerant including hydrocarbon fluoride prone to disproportionate, provided, on a contact portion of the drive shaft and the bearing portion, is an elastic bearing portion as a heat generation suppression portion suppressing excessive heat generation due to line contact of an end edge portion of the bearing portion with the drive shaft during rotation of the drive shaft.Type: GrantFiled: August 9, 2022Date of Patent: April 30, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Kazuhiro Furusho
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Patent number: 11959667Abstract: A suction injection pipe and a subcooling heat exchanger are provided at a main refrigerant circuit in which a main refrigerant circulates. Further, a sub-refrigerant circuit that differs from the main refrigerant circuit and in which a sub-refrigerant circulates is provided. A controller performs control for switching between a cooling action of the subcooling heat-exchanger that cools the main refrigerant that is sent to a main use-side heat exchanger by using the suction injection pipe and the subcooling heat exchanger, and a cooling action of the sub-refrigerant-circuit that cools the main refrigerant that is sent to the main use-side heat exchanger by using the sub-refrigerant circuit.Type: GrantFiled: September 27, 2019Date of Patent: April 16, 2024Assignee: Daikin Industries, Ltd.Inventors: Ikuhiro Iwata, Eiji Kumakura, Kazuhiro Furusho, Ryusuke Fujiyoshi, Hiromune Matsuoka
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Patent number: 11920077Abstract: No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.Type: GrantFiled: July 16, 2019Date of Patent: March 5, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Kazuhiro Furusho, Masaru Tanaka, Shun Ohkubo, Mitsushi Itano, Yuuki Yotsumoto, Akihito Mizuno, Tomoyuki Gotou, Yasufu Yamada, Tatsumi Tsuchiya, Kenji Gobou, Hitomi Kuroki, Daisuke Karube, Tatsuya Takakuwa, Tetsushi Tsuda
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Patent number: 11859882Abstract: A refrigeration cycle apparatus uses a sensor that measures temperature of a plurality of refrigerant pipes in a contactless manner. A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, an expansion mechanism, and a use-side heat exchanger are connected in sequence. The refrigeration cycle apparatus includes a temperature detector that detects temperatures at a plurality of points in a contactless manner, and a heat-source-side controller. At least one heat-source-side heat exchanger and the use-side heat exchanger includes a plurality of refrigerant pipes through which refrigerant to be heat-exchanged flows, and a flow rate adjuster. The flow rate adjuster adjusts flow rate of the refrigerant flowing through each of the plurality of refrigerant pipes. The temperature detector detects respective temperatures of the plurality of refrigerant pipes.Type: GrantFiled: September 20, 2022Date of Patent: January 2, 2024Assignee: Daikin Industries, Ltd.Inventors: Ryuhei Kaji, Hirokazu Fujino, Kazuhiro Furusho
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Publication number: 20230417459Abstract: A refrigeration cycle apparatus includes a refrigerant circuit and an adsorbent. The refrigerant circuit includes a compressor that compresses a refrigerant. The refrigerant circuit configures a vapor compression refrigeration cycle in which the refrigerant circulates. The adsorbent adsorbs and desorbs the refrigerant circulating in the refrigerant circuit. The adsorbent adsorbs and desorbs the refrigerant in accordance with a change in a pressure of the refrigerant circulating in the refrigerant circuit.Type: ApplicationFiled: June 27, 2023Publication date: December 28, 2023Applicants: DAIKIN INDUSTRIES, LTD., The University of TokyoInventors: Eiji KUMAKURA, Ryuhei KAJI, Hiroki UEDA, Masaki TANAKA, Kosuke NISHIMURA, Kazuhiro FURUSHO, Yoshimasa KIKUCHI, Hirofumi DAIGUJI, Arun MAJUMDAR, Wei-Lun HSU, Jubair Ahmed SHAMIM
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Publication number: 20230375235Abstract: A process for producing spherical activated carbon is complex; therefore, an adsorbent that has an effective adsorption amount larger than or equal to that of spherical activated carbon and that is easily produced is desired. An adsorption heat pump uses, as refrigerant, carbon dioxide and uses, as an adsorbent, a metal-organic framework including a metal ion and an organic ligand. The metal-organic framework is, for example, MOF-200.Type: ApplicationFiled: September 29, 2021Publication date: November 23, 2023Applicants: DAIKIN INDUSTRIES, LTD., Atomis Inc.Inventors: Kazuhiro FURUSHO, Akinari SUGIYAMA, Michiru KAGAWA, Daisuke ASARI, Dai KATAOKA, Kenji SUMIDA
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Publication number: 20230029441Abstract: No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.Type: ApplicationFiled: July 16, 2019Publication date: January 26, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Kazuhiro FURUSHO, Masaru TANAKA, Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA, Tatsumi TSUCHIYA, Kenji GOBOU, Hitomi KUROKI, Daisuke KARUBE, Tatsuya TAKAKUWA, Tetsushi TSUDA
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Publication number: 20230020557Abstract: A refrigeration cycle apparatus uses a sensor that measures temperature of a plurality of refrigerant pipes in a contactless manner. A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, an expansion mechanism, and a use-side heat exchanger are connected in sequence. The refrigeration cycle apparatus includes a temperature detector that detects temperatures at a plurality of points in a contactless manner, and a heat-source-side controller. At least one heat-source-side heat exchanger and the use-side heat exchanger includes a plurality of refrigerant pipes through which refrigerant to be heat-exchanged flows, and a flow rate adjuster. The flow rate adjuster adjusts flow rate of the refrigerant flowing through each of the plurality of refrigerant pipes. The temperature detector detects respective temperatures of the plurality of refrigerant pipes.Type: ApplicationFiled: September 20, 2022Publication date: January 19, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Ryuhei KAJI, Hirokazu FUJINO, Kazuhiro FURUSHO
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Publication number: 20220381245Abstract: In a compressor compressing a refrigerant including hydrocarbon fluoride prone to disproportionate, provided, on a contact portion of the drive shaft and the bearing portion, is an elastic bearing portion as a heat generation suppression portion suppressing excessive heat generation due to line contact of an end edge portion of the bearing portion with the drive shaft during rotation of the drive shaft.Type: ApplicationFiled: August 9, 2022Publication date: December 1, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Kazuhiro FURUSHO
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Publication number: 20220325923Abstract: A refrigerant cycle system includes: a first refrigerant circuit that includes a first heat exchanger, a first compressor, and a first cascade heat exchanger and that is configured as a first vapor compression refrigeration cycle; a second refrigerant circuit that includes the first cascade heat exchanger, a second compressor, and a second heat exchanger and that is configured as a second vapor compression refrigeration cycle; a first unit that accommodates the first heat exchanger and the first compressor; a second unit that accommodates the first cascade heat exchanger and the second compressor; and a third unit that accommodates the second heat exchanger. The first unit, the second unit, and the third unit are disposed apart from each other. The first cascade heat exchanger performs heat exchange between a first refrigerant that flows through the first refrigerant circuit and a second refrigerant that flows through the second refrigerant circuit.Type: ApplicationFiled: June 11, 2020Publication date: October 13, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takuro Yamada, Atsushi Yoshimi, Eiji Kumakura, Ikuhiro Iwata, Kazuhiro Furusho, Mikio Kagawa, Michio Moriwaki, Tomoatsu Minamida, Hiromune Matsuoka, Junya Minami
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Patent number: 11326819Abstract: A refrigeration apparatus includes a refrigerant circuit including: a compressor, a radiator, an expansion mechanism, and an evaporator. The refrigerant circuit encloses a refrigerant that contains a fluorinated hydrocarbon that causes a disproportionation reaction. The refrigerant circuit further includes: a discharged refrigerant recovery receiver that is connected to a path between a discharge side of the compressor and a gas side of the radiator through a discharged refrigerant branch pipe; and a discharged refrigerant relief mechanism that is disposed in the discharged refrigerant branch pipe and that connects the discharge side of the compressor with the discharged refrigerant recovery receiver when the refrigerant on the discharge side of the compressor satisfies a predetermined condition.Type: GrantFiled: January 26, 2018Date of Patent: May 10, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Ikuhiro Iwata, Kazuhiro Furusho
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Publication number: 20220003461Abstract: In order to increase the evaporation capacity of a use-side heat exchanger regardless of operating conditions, a suction injection pipe and a subcooling heat exchanger are provided at a main refrigerant circuit in which a main refrigerant circulates. Further, a sub-refrigerant circuit that differs from the main refrigerant circuit and in which a sub-refrigerant circulates is provided. A controller performs control for switching between a cooling action of the subcooling heat-exchanger that cools the main refrigerant that is sent to a main use-side heat exchanger by using the suction injection pipe and the subcooling heat exchanger, and a cooling action of the sub-refrigerant-circuit that cools the main refrigerant that is sent to the main use-side heat exchanger by using the sub-refrigerant circuit 80.Type: ApplicationFiled: September 27, 2019Publication date: January 6, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Ikuhiro IWATA, Eiji KUMAKURA, Kazuhiro FURUSHO, Ryusuke FUJIYOSHI, Hiromune MATSUOKA
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Publication number: 20210372671Abstract: A refrigeration cycle device that includes a main refrigerant circuit and a sub-refrigerant circuit cools or heats a main refrigerant that flows between a main heat-source-side heat exchanger and a main usage-side heat exchanger by causing a sub-usage-side heat exchanger to function as an evaporator or a radiator of a sub-refrigerant. A first main expansion mechanism and a second main expansion mechanism that decompress the main refrigerant are provided on an upstream side and a downstream side of the sub-usage-side heat exchanger of the main refrigerant circuit.Type: ApplicationFiled: September 30, 2019Publication date: December 2, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Ikuhiro IWATA, Eiji KUMAKURA, Kazuhiro FURUSHO, Ryusuke FUJIYOSHI, Hiromune MATSUOKA
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Publication number: 20210356177Abstract: At a refrigeration cycle device, an injection pipe and an economizer heat exchanger are provided at a main refrigerant circuit. In addition, the refrigeration cycle device includes a sub-refrigerant circuit having a sub-usage-side heat exchanger. At the refrigeration cycle device, the sub-usage-side heat exchanger functions as an evaporator of a sub-refrigerant and cools a main refrigerant that has been cooled at the economizer heat exchanger, or functions as a radiator of the sub-refrigerant and heats the main refrigerant that has been cooled at the economizer heat exchanger.Type: ApplicationFiled: September 30, 2019Publication date: November 18, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Ikuhiro IWATA, Kazuhiro FURUSHO, Ryusuke FUJIYOSHI, Hiromune MATSUOKA
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Patent number: 11143446Abstract: As a refrigerant, a refrigerant containing a fluorocarbon having a property of causing a disproportionation reaction is used. A refrigeration apparatus includes: a refrigerant temperature detector configured to detect a discharged refrigerant temperature which is a temperature of the refrigerant that is being discharged from the compression mechanism or immediately after the discharge; and a controller configured to control the discharged refrigerant temperature detected by the refrigerant temperature detector such that the discharged refrigerant temperature is equal to or lower than a predetermined temperature Ts.Type: GrantFiled: July 29, 2019Date of Patent: October 12, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Kazuhiro Furusho
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Publication number: 20210309902Abstract: No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner (1) for a vehicle includes a refrigerant circuit (10) and a refrigerant that is sealed in the refrigerant circuit (10). The refrigerant circuit (10) includes a compressor (80), a first heat exchanger (85), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger (82), a cooling control valve (87), and a second heat exchanger (86), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.Type: ApplicationFiled: July 16, 2019Publication date: October 7, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Kazuhiro FURUSHO, Masaru TANAKA, Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA, Tatsumi TSUCHIYA, Kenji GOBOU, Hitomi KUROKI, Daisuke KARUBE, Tatsuya TAKAKUWA, Tetsushi TSUDA
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Publication number: 20210215398Abstract: Even if, in decompressing a refrigerant by an expansion mechanism, the temperature of the refrigerant cannot be sufficiently reduced, in order to increase the evaporation capacity of a use-side heat exchanger, a main expansion mechanism including an expansion element of a rotary or scroll type that causes power to be produced by decompressing a main refrigerant is provided at a main refrigerant circuit in which the main refrigerant circulates. Further, a sub-refrigerant circuit that differs from the main refrigerant circuit and in which a sub-refrigerant circulates is provided. A sub-use-side heat exchanger that is provided at the sub-refrigerant circuit and that functions as an evaporator of the sub-refrigerant is caused to function as a heat exchanger that cools the main refrigerant that flows between the main expansion mechanism and a main use-side heat exchanger.Type: ApplicationFiled: March 31, 2021Publication date: July 15, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Ikuhiro IWATA, Eiji KUMAKURA, Kazuhiro FURUSHO, Ryusuke FUJIYOSHI, Hiromune MATSUOKA
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Patent number: 10968911Abstract: An oscillating piston compressor includes two oscillating compression units, and an introduction section configured to introduce an intermediate-pressure refrigerant into a compression chamber of each of the compression units. Each compression unit has a cylinder forming a cylinder chamber, a piston housed in the cylinder chamber, and a blade integrally formed with the piston. The piston rotates in the cylinder chamber while the blade oscillates. The two compression units are configured such that phases of the pistons are opposite to each other. The piston has a non-circular outer peripheral surface, and the cylinder chamber has an inner peripheral surface with a shape determined based on an envelope of the outer peripheral surface of the piston in rotation.Type: GrantFiled: February 23, 2017Date of Patent: April 6, 2021Assignee: Daikin Industries, Ltd.Inventors: Yukihiro Inada, Kazuhiro Furusho, Chihiro Endou, Takazou Sotojima
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Patent number: 10724525Abstract: A compressor includes a compression mechanism having a ring-shaped first cylinder, a first piston eccentrically rotatable in an interior of the first cylinder, a first cylinder head member disposed adjacent to one axial end of the first cylinder, a second cylinder head member disposed adjacent to an other axial end of the first cylinder, and a fastening bolt. The fastening bolt fastens the first cylinder head member, the first cylinder, and the second cylinder head member together. An end face of the first cylinder head member contacts the first cylinder, and the end face is provided with a protecting groove. The protecting groove is formed closer to a center of the first cylinder than the fastening bolt, and has a groove width smaller than a groove depth of the protecting groove.Type: GrantFiled: July 12, 2016Date of Patent: July 28, 2020Assignee: Daikin Industries, Ltd.Inventors: Yukihiro Inada, Kazuhiro Furusho, Eiji Kumakura