Patents by Inventor Kazuhiro Takahashi
Kazuhiro Takahashi 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: 11549041Abstract: An object is to provide a mixed refrigerant having three types of performance, i.e., a refrigerating capacity that is equivalent to that of R410A, a sufficiently low GWP, and a lower flammability (Class 2L) according to the ASHRAE standard. Provided is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (R32), and 2,3,3,3-tetrafluoro-1-propene (R1234yf), wherein when the mass % of HFO-1132(E), R32, and R1234yf based on their sum in the refrigerant is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), R32, and R1234yf is 100 mass % are within the range of a figure surrounded by line segments AC, CF, FD, and DA that connect the following 4 points: point A (71.1, 0.0, 28.9), point C (36.5, 18.2, 45.3), point F (47.6, 18.3, 34.1), and point D (72.0, 0.0, 28.0), or on these line segments; the line segment AC is represented by coordinates (0.0181y2?2.2288y+71.Type: GrantFiled: June 26, 2020Date of Patent: January 10, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi
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Patent number: 11549695Abstract: A heat exchange unit is provided with which, even if a flammable refrigerant is used, the likelihood of the refrigerant reaching an electric component unit is reduced. An outdoor unit (20) constitutes a portion of an air-conditioning apparatus (1), and is connected to an indoor unit (30) via a liquid-side refrigerant connection pipe (6) and a gas-side refrigerant connection pipe (5). The outdoor unit (20) includes an outdoor housing (50), an outdoor heat exchanger (23) disposed inside the outdoor housing (50) and in which a refrigerant flows, a liquid-side shutoff valve (29) connected to the liquid-side refrigerant connection pipe (6), a gas-side shutoff valve (28) connected to the gas-side refrigerant connection pipe (5), and an outdoor electric component unit (8) disposed inside the outdoor housing (50). The refrigerant is a flammable refrigerant containing at least 1,2-difluoroethylene.Type: GrantFiled: June 25, 2020Date of Patent: January 10, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Tatsuya Takakuwa, Yuzo Komatsu, Shun Ohkubo, Tetsushi Tsuda, Yumi Toda, Takeo Abe
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Publication number: 20230002659Abstract: An object is to provide a mixed refrigerant having three types of performance, i.e., a refrigerating capacity that is equivalent to that of R410A, a sufficiently low GWP, and a lower flammability (Class 2L) according to the ASHRAE standard. Provided is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (R32), and 2,3,3,3-tetrafluoro-1-propene (R1234yf), wherein when the mass % of HFO-1132(E), R32, and R1234yf based on their sum in the refrigerant is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), R32, and R1234yf is 100 mass % are within the range of a figure surrounded by line segments AC, CF, FD, and DA that connect the following 4 points: point A (71.1, 0.0, 28.9), point C (36.5, 18.2, 45.3), point F (47.6, 18.3, 34.1), and point D (72.0, 0.0, 28.0), or on these line segments; the line segment AC is represented by coordinates (0.0181y2?2.2288y+71.Type: ApplicationFiled: August 12, 2022Publication date: January 5, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI
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Patent number: 11535781Abstract: A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.Type: GrantFiled: December 18, 2018Date of Patent: December 27, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Takuro Yamada, Atsushi Yoshimi, Ikuhiro Iwata, Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Tatsuya Takakuwa, Yuzo Komatsu, Shun Ohkubo, Keisuke Ohtsuka, Yoshinari Asano, Keiji Aota, Yuuichi Yanagi, Yoshikazu Nakao, Takeo Abe, Yumi Toda, Tetsushi Tsuda
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Publication number: 20220404070Abstract: In an air conditioner that uses a refrigerant mixture containing at least 1,2-difluoroethylene, high efficiency is achieved. The motor rotation rate of a compressor (100) can be changed in accordance with an air conditioning load, and thus a high annual performance factor (APF) can be achieved. In addition, an electrolytic capacitor is not required on an output side of a rectifier circuit (21), and thus an increase in the size and cost of the circuit is suppressed.Type: ApplicationFiled: August 22, 2022Publication date: December 22, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Keisuke OHTSUKA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Tetsushi TSUDA
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Publication number: 20220389299Abstract: There is provided a refrigeration cycle apparatus in which good lubricity can be achieved when a refrigeration cycle is performed using a refrigerant having a sufficiently low GWP. The refrigeration cycle apparatus contains a refrigerating oil and a refrigerant composition containing a refrigerant containing trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).Type: ApplicationFiled: June 25, 2021Publication date: December 8, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Yuzo KOMATSU, Shun OHKUBO, Tatsuya TAKAKUWA, Tetsushi TSUDA, Takeo ABE, Yumi TODA
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Publication number: 20220380649Abstract: Provided is a refrigerant composition having two types of performance, i.e., a coefficient of performance that is equivalent to that of R410A and a sufficiently low GWP. Provided is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroethylene (HFO-1123), and difluoromethane (R32) at specific concentrations.Type: ApplicationFiled: August 3, 2022Publication date: December 1, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI
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Publication number: 20220372357Abstract: An object is to provide a mixed refrigerant having four types of performance, i.e., a coefficient of performance and a refrigerating capacity that are equivalent to those of R410A, a sufficiently low GWP, and a lower flammability (Class 2L) according to the ASHRAE standard. Provided as a means for a solution is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)) and trifluoroethylene (HFO-1123) in a total amount of 99.5 mass % or more based on the entire refrigerant, and the refrigerant comprising 62.0 mass % to 72.0 mass % of HFO-1132(E) based on the entire refrigerant.Type: ApplicationFiled: July 18, 2022Publication date: November 24, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Tatsuya TAKAKUWA, Yuzo KOMATSU
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Patent number: 11506425Abstract: An air conditioning unit capable of performing a refrigeration cycle using a small-GWP refrigerant is provided. A refrigeration cycle apparatus (1, 1a to 1m) includes a refrigerant circuit (10) including a compressor (21), a condenser (23, 31, 36), a decompressing section (24, 44, 45, 33, 38), and an evaporator (31, 36, 23), and a refrigerant containing at least 1,2-difluoroethylene enclosed in the refrigerant circuit (10).Type: GrantFiled: June 25, 2020Date of Patent: November 22, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Takuro Yamada, Atsushi Yoshimi, Ikuhiro Iwata, Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Tatsuya Takakuwa, Yuzo Komatsu, Shun Ohkubo
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Patent number: 11493244Abstract: An air-conditioning unit that is able to suppress ignition at an electric heater even when leakage of refrigerant occurs while a low-GWP refrigerant is used is provided. In an outdoor unit (20) including a casing (60), a compressor (21) provided inside the casing (60) and configured to compress refrigerant containing 1,2-difluoroethylene, and a drain pan heater (54) provided inside the casing (60), an electric power consumption of the drain pan heater (54) is lower than or equal to 300 W.Type: GrantFiled: June 25, 2020Date of Patent: November 8, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Takuro Yamada, Atsushi Yoshimi, Ikuhiro Iwata, Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Yuzo Komatsu, Shun Ohkubo, Tatsuya Takakuwa
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Patent number: 11496106Abstract: A filter device is mounted on a module substrate and is shielded by a shield member. The filter device has first and second side surfaces opposed to each other. A ground terminal and signal terminals are formed on a bottom surface of the filter device. The shield member includes side wall portions facing the first and second side surfaces. The filter device includes plural LC parallel resonance circuits therein. The inductors of the LC parallel resonance circuits are arranged in parallel with the first side surface and the bottom surface. Each inductor extends upward from its end portion electrically connected to the ground terminal, extends from the first side surface toward the second side surface, and then extends toward the bottom surface. The gap between the first side surface and the corresponding side wall portion is smaller than that between the second side surface and the corresponding side wall portion.Type: GrantFiled: June 2, 2020Date of Patent: November 8, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Kazuhiro Takahashi
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Patent number: 11492527Abstract: An object is to provide a mixed refrigerant having three types of performance, i.e., a refrigerating capacity (also referred to as refrigeration capacity and cooling capacity) and a coefficient of performance that are equivalent to those of R410A, and a sufficiently low GWP. Provided as a means for a solution is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf), and R32.Type: GrantFiled: October 17, 2018Date of Patent: November 8, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Shun Ohkubo
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Publication number: 20220348810Abstract: The present invention provides a composition comprising a refrigerant (mixed refrigerant) having three types of performance, i.e., a coefficient of performance (COP) and refrigerating capacity (Cap) that are equivalent to or higher than those of R410A, and a sufficiently low GWP. Specifically, the present invention provides a composition comprising a refrigerant, the refrigerant comprising CF3I, CO2 (R744), and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)—HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP).Type: ApplicationFiled: July 15, 2022Publication date: November 3, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Hitomi KUROKI, Kazuhiro TAKAHASHI
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Patent number: 11479839Abstract: A method for producing a hot-rolled titanium plate includes, [1] melting at least one part of the side surface of the titanium slab by radiating a beam or plasma toward the side surface, not toward the surface to be rolled, and thereafter causing re-solidification to form, in the side surface, a layer having grain diameter of 1.5 mm or less and a depth of 3.0 mm or more from the side surface; [2] performing a finishing process on the surface to be rolled of the titanium slab in which the layer is formed, to thereby bring a slab flatness index X to 3.0 or less; and [3] subjecting the titanium slab after the finishing process to hot rolling under a condition in which a length of an arc of contact of a roll L in a first pass of rough rolling is 230 mm or more.Type: GrantFiled: October 26, 2017Date of Patent: October 25, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Yoshitsugu Tatsuzawa, Tomonori Kunieda, Kenichi Mori, Kazuhiro Takahashi, Hideki Fujii
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Publication number: 20220324300Abstract: A glass assembly with a resin frame for a vehicle window includes a glass plate; and a resin frame disposed on a peripheral edge area of the glass plate, wherein an electrical component disposed in a second section and an electrical connection member disposed in a first section are electrically connected together via a through hole as a relay portion interposed between a surface and an inner side surface with an adhesive applied thereto, and wherein the through hole is sealed with a sealing member.Type: ApplicationFiled: April 5, 2022Publication date: October 13, 2022Applicant: AGC Inc.Inventor: Kazuhiro TAKAHASHI
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Patent number: 11459649Abstract: A titanium sheet including the following chemical components in mass %: Cu: 0.70 to 1.50%, Cr: 0 to 0.40%, Mn: 0 to 0.50%, Si: 0.10 to 0.30%, O: 0 to 0.10%, Fe: 0 to 0.06%, N: 0 to 0.03%, C: 0 to 0.08%, H: 0 to 0.013%, elements except the above and Ti: 0 to 0.1% each, with a total amount of the elements being 0.3% or less, and the balance: Ti, wherein A value defined by Formula (1) is 1.15 to 2.5 mass %, and the titanium sheet having a metal microstructure in which an area fraction of an ? phase is 95% or more, an area fraction of a ? phase is 5% or less, and an area fraction of an intermetallic compound is 1% or less, wherein an average crystal grain size D (?m) of the ? phase is 20 to 70 ?m and satisfies Formula (2).Type: GrantFiled: August 31, 2017Date of Patent: October 4, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Hidenori Takebe, Kazuhiro Takahashi, Hideki Fujii
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Patent number: 11454433Abstract: An air-conditioning unit that is able to suppress ignition at an electric heater even when leakage of refrigerant occurs while a low-GWP refrigerant is used is provided. In an outdoor unit (20) including a casing (60), a compressor (21) provided inside the casing (60) and configured to compress refrigerant containing 1,2-difluoroethylene, and a drain pan heater (54) provided inside the casing (60), an electric power consumption of the drain pan heater (54) is lower than or equal to 300 W.Type: GrantFiled: June 25, 2020Date of Patent: September 27, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Eiji Kumakura, Takuro Yamada, Atsushi Yoshimi, Ikuhiro Iwata, Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Yuzo Komatsu, Shun Ohkubo, Tatsuya Takakuwa
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Patent number: 11451319Abstract: A high-frequency circuit includes a transmission circuit that transmits a high-frequency signal, a reception circuit that receives a high-frequency signal, and a multiplexer that separates a reception path and a transmission path for high-frequency signals. In the reception circuit, a filter circuit in which a first frequency response and a second frequency response different from the first frequency response can be switched in accordance with a jamming wave for a high-frequency signal to be received is provided in the reception path for a high-frequency signal.Type: GrantFiled: November 24, 2020Date of Patent: September 20, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Kazuhiro Takahashi
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Patent number: 11441819Abstract: A refrigeration cycle apparatus that can improve operation efficiency when a refrigerant that contains at least 1,2-difluoroethylene is used is provided. An air conditioning apparatus 1 includes a compressor (21), an outdoor heat exchanger (23), an outdoor expansion valve (24), an indoor heat exchanger (31), and a suction injection pipe (40), and uses a refrigerant that contains at least 1,2-difluoroethylene. The suction injection pipe (40) allows a part of a refrigerant that flows toward the indoor heat exchanger (31) from the outdoor heat exchanger (23) to merge with a low-pressure refrigerant that is sucked into the compressor (21).Type: GrantFiled: June 25, 2020Date of Patent: September 13, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Tatsuya Takakuwa, Yuzo Komatsu, Shun Ohkubo, Tetsushi Tsuda, Takeo Abe, Yumi Toda
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Patent number: 11441802Abstract: An air conditioning apparatus 1 includes a compressor (321), an indoor heat exchanger (242) that is a use-side heat exchanger that exchanges heat with first air (F1), an outdoor heat exchanger (323) that is a heat-source-side heat exchanger that exchanges heat with second air, a refrigerant, a first duct (209), and a casing (230). The refrigerant contains at least 1,2-difluoroethylene, and circulates in the compressor (321), the indoor heat exchanger (242), and the outdoor heat exchanger (323) to repeat a refrigeration cycle. The first duct (209) supplies the first air (F1) to a plurality of rooms in an interior. The casing (230) includes a use-side space (SP2) that is connected to the first duct (209) and that accommodates the indoor heat exchanger (242). The casing (230) is configured to allow the first air (F1) after heat exchange with the refrigerant at the indoor heat exchanger (242) to be sent out to the first duct (209).Type: GrantFiled: June 26, 2020Date of Patent: September 13, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Daisuke Karube, Yuuki Yotsumoto, Kazuhiro Takahashi, Yuzo Komatsu, Shun Ohkubo, Tatsuya Takakuwa, Tetsushi Tsuda, Yuuichi Yanagi