Patents by Inventor Kenji Gobou
Kenji Gobou 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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Publication number: 20230174836Abstract: An object is to provide a novel low-GWP mixed refrigerant. Provided is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroiodomethane (CF3I), 2,3,3,3-tetrafluoro-1-propene (R1234yf), and difluoromethane (R32).Type: ApplicationFiled: January 27, 2023Publication date: June 8, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Shun OHKUBO, Satoshi TOKUNO, Kenji GOBOU
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Publication number: 20230132359Abstract: 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 is a small-GWP refrigerant.Type: ApplicationFiled: July 16, 2019Publication date: April 27, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Yoshinari ASANO, Keisuke OHTSUKA, Keiji AOTA, Mitsushi ITANO, Shun OHKUBO, Tatsuya TAKAKUWA, Daisuke KARUBE, Yuuki YOTSUMOTO, Kenji GOBOU, Hitomi KUROKI, Tomoyuki GOTOU, Akihito MIZUNO, Yasufu YAMADA, Tatsumi TSUCHIYA, Yuuichi YANAGI, Yoshikazu NAKAO, Takeo ABE, Yumi TODA, Tetsushi TSUDA
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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: 20220380648Abstract: 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 is a small-GWP refrigerant.Type: ApplicationFiled: July 16, 2019Publication date: December 1, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Yoshinari ASANO, Keisuke OHTSUKA, Keiji AOTA, Mitsushi ITANO, Shun OHKUBO, Tatsuya TAKAKUWA, Daisuke KARUBE, Yuuki YOTSUMOTO, Kenji GOBOU, Hitomi KUROKI, Tomoyuki GOTOU, Akihito MIZUNO, Yasufu YAMADA, Tatsumi TSUCHIYA, Yuuichi YANAGI, Yoshikazu NAKAO, Takeo ABE, Yumi TODA, Tetsushi TSUDA
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Publication number: 20220356386Abstract: A showcase includes a refrigerant circuit and a refrigerant enclosed in the refrigerant circuit. The refrigerant circuit includes a compressor (121), a radiator (122), an expansion valve (123), and an evaporator (124). The refrigerant is a low-GWP refrigerant.Type: ApplicationFiled: July 16, 2019Publication date: November 10, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shinichi FUJINAKA, Masaru TANAKA, Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU, Daisuke KARUBE, Tatsuya TAKAKUWA
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Patent number: 11306234Abstract: The present invention provides a composition containing a refrigerant having characteristics equal to or higher than those of R23. Specifically, the present invention provides a composition containing a refrigerant, wherein the refrigerant contains (a) at least one perfluorocarbon (PFC) selected from the group consisting of PFC-14, PFC-116, PFC-c216, PFC-218, PFC-c318, and PFC-31-10, and (b) an unsaturated compound.Type: GrantFiled: April 17, 2019Date of Patent: April 19, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Shun Ohkubo, Mitsushi Itano, Hitomi Kuroki, Tatsumi Tsuchiya, Kenji Gobou
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Patent number: 11286409Abstract: Provided is a composition containing a refrigerant that has a refrigerating capacity equivalent to that of widely used R404A, and a low GWP. The composition contains a refrigerant that contains difluoromethane (R32), pentafluoroethane (R125), 1,1,1-trifluoroethane (R143a), and 1,1,1,2-tetrafluoroethane (R134a) in specific concentrations.Type: GrantFiled: December 7, 2018Date of Patent: March 29, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Hitomi Kuroki, Shun Ohkubo, Tatsumi Tsuchiya, Kenji Gobou
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Publication number: 20220073802Abstract: An object is to provide a mixed refrigerant that has desired properties as an alternative refrigerant for R410A. As a solution to achieve the object, a composition containing a refrigerant that contains difluoromethane (R32), carbon dioxide (CO2), pentafluoroethane (R125), 1,1,1,2-tetrafluoroethane (R134a), and 2,3,3,3-tetrafluoropropene (R1234yf) in a specific mixture ratio is provided.Type: ApplicationFiled: October 22, 2021Publication date: March 10, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
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Patent number: 11186672Abstract: Provided is a polymer capable of providing a coating film that has good initial adhesiveness to a base material and good adhesiveness thereto after a pressure cooker test, and has excellent abrasion resistance as determined by a falling sand abrasion test. The polymer includes a perhaloolefin unit, a vinyl ester unit that contains neither a hydroxy group nor an aromatic ring; and a hydroxy group-containing monomer unit. The polymer has a hydroxyl value of 110 mgKOH/g or greater.Type: GrantFiled: March 9, 2017Date of Patent: November 30, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Hideto Nakagawa, Kengo Ito, Kenji Gobou, Koichiro Ogita, Katsuhiko Imoto
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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: 20210269693Abstract: The present disclosure provides a composition comprising a refrigerant (mixed refrigerant), the composition having three types of performance; i.e., a coefficient of performance (COP) and a refrigerating capacity (Cap) that are equivalent to or higher than those of R404A and/or R410A, and a sufficiently low GWP. The present disclosure specifically provides a composition comprising a refrigerant, the refrigerant comprising difluoromethane (HFC-32), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and at least one of 1,1-difluoroethylene (HFO-1132a) and tetrafluoroethylene (FO-1114).Type: ApplicationFiled: July 8, 2019Publication date: September 2, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Yasufu YAMADA, Tatsumi TSUCHIYA, Kenji GOBOU
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Publication number: 20210261841Abstract: The present disclosure addresses the problem of providing a refrigerant composition that has a low GWP and a refrigerating capacity equivalent to that of R404A, which is currently widely used. As a solution to the problem, the present disclosure provides a composition containing carbon dioxide and a mixture of fluorinated hydrocarbons, the mixture containing difluoromethane (R32), pentafluoroethane (R125), 2,3,3,3-tetrafluoropropene (R1234yf), 1,1,1,2-tetrafluoroethane (R134a), and carbon dioxide (CO2) in specific concentrations.Type: ApplicationFiled: April 25, 2019Publication date: August 26, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Hitomi KUROKI, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
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Publication number: 20210230467Abstract: Provided is a composition containing a refrigerant that has a refrigerating capacity equivalent to that of widely used R404A, and a low GWP. The composition contains a refrigerant that contains difluoromethane (R32), pentafluoroethane (R125), 1,1,1-trifluoroethane (R143a), and 1,1,1,2-tetrafluoroethane (R134a) in specific concentrations.Type: ApplicationFiled: December 7, 2018Publication date: July 29, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Hitomi KUROKI, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
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Patent number: 11072153Abstract: The invention provides a novel composition capable of providing a film or coat exhibiting excellent adhesiveness to a water-impermeable sheet and to an EVA encapsulant layer even without corona discharge treatment. The composition of the invention contains a fluorine-containing polymer and a polyol compound having a hydroxyl value of 10 to 300. The polyol compound is contained in an amount of not less than 0.1 mass % but less than 100 mass % relative to the fluorine-containing polymer.Type: GrantFiled: March 29, 2016Date of Patent: July 27, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Hideto Nakagawa, Hidenori Ozaki, Kenji Gobou, Koichiro Ogita
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Publication number: 20210189208Abstract: A problem to be solved is to provide a composition containing a refrigerant that satisfies the following four properties: (1) a GWP of 1500 or less, (2) ASHRAE non-flammability, (3) a COP equivalent to that of R410A, and (4) a refrigerating capacity equivalent to that of R410A. As a solution to the problem, provided is a composition containing a refrigerant that contains CO2, R32, R125, and R134a, wherein when the mass % of CO2, R32, R125, and R134a based on their sum in the refrigerant is respectively x, a, b, and c, coordinates (a,b,c) in a ternary composition diagram in which 2.7?x<6.0, and the sum of R32, R125, and R134a is (100?x) mass % fall within a triangular region surrounded by line segments that connect point E, point F, and point G, or on the line segments; or coordinates (a,b,c) in a ternary composition diagram in which 6.0?x<9.0 fall within a triangular region surrounded by line segments that connect point E, point F, and point G, or on the line segments.Type: ApplicationFiled: December 12, 2018Publication date: June 24, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
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Patent number: 11034871Abstract: This invention provides a composition comprising a refrigerant, the composition being non-flammable like R404A (R125/R134a/R143a=44/4/52 wt %), and having a refrigerating capacity that can replace that of R404A, a COP that is equal or superior to that of R404A, and a GWP of 1500 or less. Specifically, the invention provides a composition comprising a refrigerant, the refrigerant comprising a mixture of fluorinated hydrocarbons, the mixture comprising difluoromethane (R32), pentafluoroethane (R125), and 1,1,1,2-tetrafluoroethane (R134a) at specific concentrations, the fluorinated hydrocarbons contained in the mixture having a specific composition ratio. This composition is for use as an alternative refrigerant for R22 or an alternative refrigerant for R404A.Type: GrantFiled: April 19, 2018Date of Patent: June 15, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi Itano, Shun Ohkubo, Hitomi Kuroki, Tatsumi Tsuchiya, Kenji Gobou
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Publication number: 20210147734Abstract: Provided is an alternative mixed refrigerant that has an acceptable concentration (OEL) of 400 ppm or more based on the entire composition, as calculated with the OEL of R1234yf as 200 ppm. A solution is to provide a composition containing a refrigerant that contains difluoromethane (R32), 2,3,3,3-tetrafluoropropene (R1234yf), and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)), wherein the three components have a mass ratio that falls within the region surrounded by lines a, b, c, d, and e that connect 5 points (points A, B, C, D, and E) of a ternary composition diagram that has the three components as vertices of FIG. 1.Type: ApplicationFiled: January 28, 2021Publication date: May 20, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
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Publication number: 20210122961Abstract: The present invention provides a composition containing a refrigerant having characteristics equal to or higher than those of R23. Specifically, the present invention provides a composition containing a refrigerant, wherein the refrigerant contains (a) at least one perfluorocarbon (PFC) selected from the group consisting of PFC-14, PFC-116, PFC-c216, FFC-218, PFC-c318, and PFC-31-10, and (b) an unsaturated compound.Type: ApplicationFiled: April 17, 2019Publication date: April 29, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shun OHKUBO, Mitsushi ITANO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
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Publication number: 20210108120Abstract: The present invention provides a refrigerant-containing composition by using a refrigerant that has a refrigerating capacity equivalent to that of widely used R404A, and a low GWP. Specifically, the present invention provides a composition that contains a refrigerant containing difluoromethane (R32), pentafluoroethane (R125), 1,1,1-trifluoroethane (R143a), 2,3,3,3-tetrafluropropene (R1234yf), and 1,1,1,2-tetrafluoroethane (R134a) in specific concentrations.Type: ApplicationFiled: April 18, 2019Publication date: April 15, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Hitomi KUROKI, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
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Publication number: 20200216735Abstract: An object is to provide a refrigerant composition that is comprehensively excellent in various properties usually required of refrigerants, i.e., (1) low GWP, stability, and minimized temperature glide, as well as in essential properties required of alternative refrigerants for R404A, i.e., (2) refrigerating capacity, compressor outlet pressure, and COP that are substantially equivalent to those of R404A. In order to achieve this object, a composition containing a refrigerant is provided wherein the refrigerant contains difluoromethane (R32), trifluoroethylene (R1123), and 2,3,3,3-tetrafluoropropene (R1234yf) at a mass ratio that falls within the region surrounded by lines a, c and d, which connect the following three points in a ternary composition diagram of FIG. 1 whose vertices represent the three components: point A (R32/R1123/R1234yf=25.6/13.4/61.0 mass %); point B (R32/R1123/R1234yf=25.6/3.4/71.0 mass %); and point C (R32/R1123/R1234yf=3.9/36.5/59.6 mass %).Type: ApplicationFiled: June 11, 2018Publication date: July 9, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU