Patents by Inventor Ryusuke Fujiyoshi
Ryusuke Fujiyoshi 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: 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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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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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: 8387411Abstract: An air-conditioning apparatus uses carbon dioxide as a refrigerant, and includes a two-stage-compression-type compression mechanism, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, and an intercooler. The intercooler uses air as a heat source. The intercooler is configured and arranged to cool refrigerant flowing through an intermediate refrigerant tube that draws refrigerant discharged from the first-stage compression element into the second-stage compression element. The intercooler is integrated with the heat source-side heat exchanger to form an integrated heat exchanger, with the intercooler disposed in an upper part of the integrated heat exchanger.Type: GrantFiled: November 28, 2008Date of Patent: March 5, 2013Assignee: Daikin Industries, Ltd.Inventors: Shuji Fujimoto, Atsushi Yoshimi, Yoshio Ueno, Ryusuke Fujiyoshi, Toshiyuki Kurihara, Shun Yoshioka
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Patent number: 7886556Abstract: An air conditioning system includes a plurality of latent heat utilization side refrigerant circuits which are connected in parallel with one another, and a plurality of sensible heat utilization side refrigerant circuits which are connected in parallel with one another. The latent heat utilization side refrigerant circuits include adsorbent heat exchangers provided with an adsorbent on the surface of each. The sensible heat utilization side refrigerant circuits respectively include air heat exchangers and are capable of exchanging heat between the refrigerant and air.Type: GrantFiled: March 23, 2005Date of Patent: February 15, 2011Assignee: Daikin Industries, Ltd.Inventors: Ryusuke Fujiyoshi, Tomohiro Yabu
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Publication number: 20100300141Abstract: An air-conditioning apparatus uses carbon dioxide as a refrigerant, and includes comprises a two-stage-compression-type compression mechanism, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, and an intercooler. The intercooler uses air as a heat source. The intercooler is configured and arranged to cool refrigerant flowing through an intermediate refrigerant tube that draws refrigerant discharged from the first-stage compression element into the second-stage compression element. The intercooler is integrated with the heat source-side heat exchanger to form an integrated heat exchanger, with the intercooler disposed in an upper part of the integrated heat exchanger.Type: ApplicationFiled: November 28, 2008Publication date: December 2, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shuji Fujimoto, Atsushi Yoshimi, Yoshio Ueno, Ryusuke Fujiyoshi, Toshiyuki Kurihara, Shun Yoshioka
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Publication number: 20100242529Abstract: A refrigeration apparatus uses a refrigerant that operates in a supercritical range, and includes a compression mechanism, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, an intercooler and an intermediate oil separation mechanism. The compression mechanism has a plurality of compression elements, and is configured and arranged so that refrigerant discharged from a first-stage compression element is sequentially compressed by a second-stage compression element. The intercooler is configured and arranged to cool refrigerant flowing through an intermediate refrigerant tube that draws refrigerant discharged from the first-stage compression element into the second-stage compression element. The intermediate oil separation mechanism is configured and arranged to separate a refrigeration oil from the refrigerant discharged from the first-stage compression element.Type: ApplicationFiled: November 26, 2008Publication date: September 30, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shuji Fujimoto, Atsushi Yoshimi, Yoshio Ueno, Ryusuke Fujiyoshi, Toshiyuki Kurihara
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Publication number: 20080265045Abstract: A humidity control system (10) is constituted by a single outdoor unit (13) and two humidity control units (11, 12). The two humidity control units (11, 12) are connected to the outdoor unit (13). With switching of the position of an outdoor four-way selector valve (22) in the outdoor unit (13), the flow direction of refrigerant in humidity control circuits (30, 40) in the humidity control units (11, 12) is inverted. Out of a first adsorption heat exchanger (31, 41) and a second adsorption heat exchanger (32, 42) in each humidity control circuit (30, 40), one serving as an evaporator dehumidifies a first air and the other serving as a condenser humidifies a second air. Each humidity control unit (11, 12) performs a dehumidification operation by supplying the dehumidified first air to a room and performs a humidification operation by supplying the humidified second air to the room.Type: ApplicationFiled: March 30, 2005Publication date: October 30, 2008Inventors: Tomohiro Yabu, Ryusuke Fujiyoshi
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Patent number: 7395677Abstract: An air conditioning system to treat a latent heat load and a sensible heat load in a room includes a plurality of utilization units, a heat source unit, and connection pipes that connect between the units. The utilization units include adsorbent heat exchangers provided with an adsorbent on the surface of each. The utilization units are configured to alternate between an adsorption process and a regeneration process. The heat source unit includes a compression mechanism and an accumulator.Type: GrantFiled: March 23, 2005Date of Patent: July 8, 2008Assignee: Daikin Industries, Ltd.Inventors: Ryusuke Fujiyoshi, Tomohiro Yabu
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Publication number: 20070180851Abstract: An air conditioning system includes a plurality of latent heat utilization side refrigerant circuits which are connected in parallel with one another, and a plurality of sensible heat utilization side refrigerant circuits which are connected in parallel with one another. The latent heat utilization side refrigerant circuits include adsorbent heat exchangers provided with an adsorbent on the surface of each. The sensible heat utilization side refrigerant circuits respectively include air heat exchangers and are capable of exchanging heat between the refrigerant and air.Type: ApplicationFiled: March 23, 2005Publication date: August 9, 2007Applicant: Daikin Industries, Ltd.Inventors: Ryusuke Fujiyoshi, Tomohiro Yabu
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Publication number: 20070180844Abstract: An air conditioning system to treat a latent heat load and a sensible heat load in a room includes a plurality of utilization units, a heat source unit, and connection pipes that connect between the units. The utilization units include adsorbent heat exchangers provided with an adsorbent on the surface of each. The utilization units are configured to alternate between an adsorption process and a regeneration process. The heat source unit includes a compression mechanism and an accumulator.Type: ApplicationFiled: March 23, 2005Publication date: August 9, 2007Applicant: Daikin Industries, Ltd.Inventors: Ryusuke Fujiyoshi, Tomohiro Yabu