Patents by Inventor Takahiro Akizuki
Takahiro Akizuki 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: 11913694Abstract: A heat pump system includes a refrigerant circuit in which a compressor, a refrigerant flow path included in a heat medium heat exchanger, an expansion valve, and a heat source side heat exchanger are connected, the heat medium heat exchanger including the refrigerant flow path and a heat medium flow path; a heat medium feed path connected to the heat medium flow path included in the heat medium heat exchanger; an indoor unit connected to the heat medium feed path and configured to condition air inside a room; a room temperature sensor configured to detect an indoor temperature in the room; a heat medium temperature sensor configured to detect a temperature of a heat medium that flows into the indoor unit; and a controller configured to control the refrigerant circuit or the indoor unit by using a set temperature in the room.Type: GrantFiled: March 7, 2018Date of Patent: February 27, 2024Assignee: Mitsubishi Electric CorporationInventors: Kazuki Hayashida, Yasushi Okoshi, Takuya Ito, Yoshio Yamano, Kimitaka Kadowaki, Takahiro Akizuki
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Patent number: 11724337Abstract: A hybrid welding device capable of reducing an influence of by-products such as spatters, plasma, plumes, and fume, and reducing contamination of a laser optical system and welding defects is provided. A laser head includes a laser nozzle that forms an optical path of a laser beam, a first rectifying plate that is arranged on a tip side of the laser nozzle so as not to interfere with the laser beam, a first air knife that injects compressed air along the first rectifying plate, a second rectifying plate that is arranged between the first rectifying plate and the welded portion so as not to interfere with the laser beam, and a second air knife that injects compressed air along the second rectifying plate. The first rectifying plate and the second rectifying plate have a shape elongated in a direction perpendicular to an optical axis of the laser beam and a welding direction. The second rectifying plate has a torch opening through which a tip of a welding torch can be inserted.Type: GrantFiled: May 15, 2019Date of Patent: August 15, 2023Assignees: IHI INSPECTION & INSTRUMENTATION CO., LTD., TADANO LTD.Inventors: Katsura Owaki, Isao Kawaguchi, Satomi Maki, Hiroki Matsuo, Takahiro Akizuki, Naoya Sawada
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Patent number: 11408656Abstract: A heat source device includes a heat medium channel through which a heat medium flows, a plurality of refrigerant circuits through which refrigerant circulates, and a plurality of heat-medium heat exchangers configured to cause heat exchange to be performed between the heat medium in the heat medium channel and the refrigerant in the refrigerant circuits. The plurality of heat-medium heat exchangers include a first heat-medium heat exchanger to which at least one of the refrigerant circuits is connected and a second heat-medium heat exchanger to which a greater number of the refrigerant circuits are connected than to the first heat-medium heat exchanger.Type: GrantFiled: March 7, 2018Date of Patent: August 9, 2022Assignee: Mitsubishi Electric CorporationInventors: Yasushi Okoshi, Takuya Ito, Yoshio Yamano, Takahiro Akizuki, Tomoyoshi Obayashi, Kimitaka Kadowaki, Naoya Mukaitani
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Patent number: 11333401Abstract: In a refrigeration cycle apparatus, each set of air heat exchangers among plural sets of air heat exchangers is one set of one or more of single heat exchangers, and the single heat exchangers each have an upper header pipe, a lower header pipe, a heat transfer tube, and a fin. During a cooling operation, a series refrigerant flow path is formed in which refrigerant flows in series through each set of the air heat exchangers; in the series refrigerant flow path, the refrigerant flows downward from above through the heat transfer tubes that all single heat exchangers have. During a heating operation, a parallel refrigerant flow path is formed in which the refrigerant flows in parallel through each set of the air heat exchangers; in the parallel refrigerant flow path, the refrigerant flows upward from below through the heat transfer tubes that all single heat exchangers have.Type: GrantFiled: July 4, 2017Date of Patent: May 17, 2022Assignee: Mitsubishi Electric CorporationInventors: Takahiro Akizuki, Takuya Ito, Yoshio Yamano
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Patent number: 11181304Abstract: A chilling unit and a water circulation temperature control system includes a refrigerant circuit, a pipe through which a heat medium flows, a flow switching valve, a temperature sensor, a pressure sensor, and a controller. The refrigerant circuit includes a compressor, a pair of air-side heat exchangers, an expansion valve, and a heat-medium-side heat exchanger connected to each other by pipes. The flow switching valve switches between refrigerant-circulation routes. The controller controls the compressor in accordance with a target outlet temperature, the heat medium temperature detected by the temperature sensor, and a heat medium pressure difference detected by the pressure sensor. When a load on an air handler decreases to a low level and is equal to or less than the compressor's lowest capacity, the controller controls the flow switching valve so that one of the air-side heat exchangers and the heat-medium-side heat exchanger are connected in parallel.Type: GrantFiled: May 19, 2017Date of Patent: November 23, 2021Assignee: Mitsubishi Electric CorporationInventors: Yoshio Yamano, Kimitaka Kadowaki, Takahiro Akizuki, Takuya Ito, Yasushi Okoshi
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Publication number: 20210252636Abstract: A hybrid welding device capable of reducing an influence of by-products such as spatters, plasma, plumes, and fume, and reducing contamination of a laser optical system and welding defects is provided. A laser head includes a laser nozzle that forms an optical path of a laser beam, a first rectifying plate that is arranged on a tip side of the laser nozzle so as not to interfere with the laser beam, a first air knife that injects compressed air along the first rectifying plate, a second rectifying plate that is arranged between the first rectifying plate and the welded portion so as not to interfere with the laser beam, and a second air knife that injects compressed air along the second rectifying plate. The first rectifying plate and the second rectifying plate have a shape elongated in a direction perpendicular to an optical axis of the laser beam and a welding direction. The second rectifying plate has a torch opening through which a tip of a welding torch can be inserted.Type: ApplicationFiled: May 15, 2019Publication date: August 19, 2021Inventors: Katsura OWAKI, Isao KAWAGUCHI, Satomi MAKI, Hiroki MATSUO, Takahiro AKIZUKI, Naoya SAWADA
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Publication number: 20210033324Abstract: A heat pump system includes a refrigerant circuit in which a compressor, a refrigerant flow path included in a heat medium heat exchanger, an expansion valve, and a heat source side heat exchanger are connected, the heat medium heat exchanger including the refrigerant flow path and a heat medium flow path; a heat medium feed path connected to the heat medium flow path included in the heat medium heat exchanger; an indoor unit connected to the heat medium feed path and configured to condition air inside a room; a room temperature sensor configured to detect an indoor temperature in the room; a heat medium temperature sensor configured to detect a temperature of a heat medium that flows into the indoor unit; and a controller configured to control the refrigerant circuit or the indoor unit by using a set temperature in the room.Type: ApplicationFiled: March 7, 2018Publication date: February 4, 2021Inventors: Kazuki HAYASHIDA, Yasushi OKOSHI, Takuya ITO, Yoshio YAMANO, Kimitaka KADOWAKI, Takahiro AKIZUKI
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Publication number: 20210033326Abstract: A heat source device includes a heat medium channel through which a heat medium flows, a plurality of refrigerant circuits through which refrigerant circulates, and a plurality of heat-medium heat exchangers configured to cause heat exchange to be performed between the heat medium in the heat medium channel and the refrigerant in the refrigerant circuits. The plurality of heat-medium heat exchangers include a first heat-medium heat exchanger to which at least one of the refrigerant circuits is connected and a second heat-medium heat exchanger to which a greater number of the refrigerant circuits are connected than to the first heat-medium heat exchanger.Type: ApplicationFiled: March 7, 2018Publication date: February 4, 2021Inventors: Yasushi OKOSHI, Takuya ITO, Yoshio YAMANO, Takahiro AKIZUKI, Tomoyoshi OBAYASHI, Kimitaka KADOWAKI, Naoya MUKAITANI
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Publication number: 20200200439Abstract: In a refrigeration cycle apparatus, each set of air heat exchangers among a plurality of sets of air heat exchangers is one set of one or more of single heat exchangers, and the single heat exchangers each have an upper header pipe, a lower header pipe, a heat transfer tube, and a fin. During a cooling operation, a series refrigerant flow path is formed in which refrigerant flows in series through each set of the air heat exchangers, and in the series refrigerant flow path, the refrigerant flows downward from above through the heat transfer tubes that all the single heat exchangers have. During a heating operation, a parallel refrigerant flow path is formed in which the refrigerant flows in parallel through each set of the air heat exchangers, and in the parallel refrigerant flow path, the refrigerant flows upward from below through the heat transfer tubes that all the single heat exchangers have.Type: ApplicationFiled: July 4, 2017Publication date: June 25, 2020Inventors: Takahiro AKIZUKI, Takuya ITO, Yoshio YAMANO
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Patent number: 10634394Abstract: A heat exchange apparatus includes a first heat exchanger configured to transfer heat between a refrigerant and another medium, a plurality of second heat exchangers configured to transfer heat between the refrigerant and the liquid, a compressor configured to pressurize the refrigerant and a plurality of expansion devices for each of the plurality of second heat exchangers and configured to expand the refrigerant pressurized by the compressor, wherein the refrigerant flows through the plurality of second heat exchangers in parallel, and the liquid flows through the plurality of second heat exchangers in series.Type: GrantFiled: September 7, 2016Date of Patent: April 28, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Nobukazu Shimodahira, Kimio Koda, Hongzhi Sun, Kazushige Tajima, Takahiro Akizuki
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Publication number: 20200064031Abstract: A chilling unit and a temperature control system using water circulation includes a refrigerant circuit, a pipe through which a heat medium flows, a flow switching device, a temperature sensor, a pressure sensor, and a controller. The refrigerant circuit includes a compressor, a pair of air-side heat exchangers, an expansion valve, and a heat-medium-side heat exchanger that are connected to each other by pipes, thereby enabling refrigerant to circulate in the refrigerant circuit. The flow switching device switches between refrigerant-circulation routes. The controller controls the compressor in accordance with a target outlet temperature, the temperature of the heat medium detected by the temperature sensor, and a pressure difference in the heat medium detected by the pressure sensor.Type: ApplicationFiled: May 19, 2017Publication date: February 27, 2020Inventors: Yoshio YAMANO, Kimitaka KADOWAKI, Takahiro AKIZUKI, Takuya ITO, Yasushi OKOSHI
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Publication number: 20170176057Abstract: A heat exchange apparatus includes a first heat exchanger configured to transfer heat between a refrigerant and another medium, a plurality of second heat exchangers configured to transfer heat between the refrigerant and the liquid, a compressor configured to pressurize the refrigerant and a plurality of expansion devices for each of the plurality of second heat exchangers and configured to expand the refrigerant pressurized by the compressor, wherein the refrigerant flows through the plurality of second heat exchangers in parallel, and the liquid flows through the plurality of second heat exchangers in series.Type: ApplicationFiled: September 7, 2016Publication date: June 22, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Nobukazu Shimodahira, Kimio Koda, Hongzhi Sun, Kazushige Tajima, Takahiro Akizuki
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Publication number: 20090137198Abstract: An insect/dust-proof air shutter which can positively prevent intrusion of foreign mater such as insects and dust and further trap intruded insects is provided.Type: ApplicationFiled: April 4, 2007Publication date: May 28, 2009Applicant: MAYEKAWA MFG. CO., LTD.Inventors: Kouichi Tsubata, Nobuo Osuga, Takahiro Akizuki, Hideki Fuchikami, Masataka Ogura, Akifumi Manaka, Masakatsu Ando, Tatsuya Nakanishi
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Patent number: D998769Type: GrantFiled: January 30, 2020Date of Patent: September 12, 2023Assignee: Mitsubishi Electric CorporationInventors: Takahiro Akizuki, Katsunori Horiuchi, Yuji Tarumi, Shoichi Hirano, Toru Kuriyama, Takuya Ito, Yoshio Yamano, Takahito Hikone, Shohei Takenaka, Takenori Matsumoto, Naoya Mukaitani, Junichi Miyai