Patents by Inventor Yasufu Yamada

Yasufu Yamada 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).

  • Publication number: 20220120476
    Abstract: An inside air-conditioning device includes a refrigerant circuit (50) and a refrigerant that is sealed in the refrigerant circuit (50). The refrigerant circuit (50) includes a compressor (10), a condenser (25), an electronic expansion valve (13), and an evaporator (17). The refrigerant contains at least 1,2-difluoroethylene.
    Type: Application
    Filed: January 28, 2020
    Publication date: April 21, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Makoto IKEMIYA, Shinichi FUJINAKA, Masaru TANAKA, Shun OHKUBO, Yuuki YOTSUMOTO, Mitsushi ITANO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA
  • Publication number: 20210355359
    Abstract: The present disclosure is to provide a composition comprising a refrigerant that has the characteristics of having a sufficiently low GWP, and having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A. The present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), 1,1,2-trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the total concentration of the three components is 99.5 mass % or more, based on the entire refrigerant, and the three components have a mass ratio that falls within a region surrounded by a figure passing through the following 5 points in a ternary composition diagram whose three vertices represent the three components: point A (HFO-1132(E)/HFO-1123/HFO-1234yf=42.5/1.0/56.5 mass %), point B (HFO-1132(E)/HFO-1123/HFO-1234yf=27.1/1.0/71.9 mass %), point C (HFO-1132(E)/HFO-1123/HFO-1234yf=1.0/30.4/68.
    Type: Application
    Filed: July 28, 2021
    Publication date: November 18, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA
  • Publication number: 20210340422
    Abstract: The present disclosure provides a composition comprising a refrigerant that has characteristics of having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. More specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (HFC-32), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the total concentration of the three components is 99.5% by mass or more, based on the entire refrigerant, and three components have a mass ratio that falls within a region surrounded by a figure passing through the following 4 points in a ternary composition diagram whose three vertices represent the three components: point A (HFO-1132(E)/HFC-32/HFO-1234yf=51.8/1.0/47.2 mass %), point B (HFO-1132(E)/HFC-32/HFO-1234yf=35.3/1.0/63.7 mass %), point C (HFO-1132(E)/HFC-32/HFO-1234yf=10.1/18.0/71.
    Type: Application
    Filed: July 13, 2021
    Publication date: November 4, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA
  • Publication number: 20210309902
    Abstract: 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: Application
    Filed: July 16, 2019
    Publication date: October 7, 2021
    Applicant: 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
  • Publication number: 20210269693
    Abstract: 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: Application
    Filed: July 8, 2019
    Publication date: September 2, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Yasufu YAMADA, Tatsumi TSUCHIYA, Kenji GOBOU
  • Publication number: 20210198547
    Abstract: The present invention provides a refrigerant composition having performance such as ASHRAE non-flammability, a large refrigerating capacity, a GWP lower than that of HFC-134a, and a COP that is equal to that of HFC-134a. A refrigerant composition comprising HFO-1234ze(E) and HFC-134, which is for use in at least one refrigeration apparatus selected from the group consisting of refrigerators, freezers, water coolers, ice makers, refrigerating showcases, freezing showcases, freezing and refrigerating units, refrigerating machines for freezing and refrigerating warehouses, chillers (chilling units), turbo refrigerating machines, and screw refrigerating machines.
    Type: Application
    Filed: October 15, 2018
    Publication date: July 1, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Daisuke KARUBE, Akihito MIZUNO, Hitomi KUROKI, Kazuhiro TAKAHASHI, Yasufu YAMADA, Tatsuya TAKAKUWA, Yuuki YOTSUMOTO
  • Publication number: 20210139758
    Abstract: The present disclosure provides a composition comprising a refrigerant characterized by having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein HFO-1132 (E) is present in an amount of 35.0 to 65.0 mass %, and HFO-1234yf is present in an amount of 65.0 to 35.0 mass %, based on the total mass of HFO-1132 (E) and HFO-1234yf, and wherein the refrigerant is for use in operating a refrigeration cycle in which the evaporation temperature is ?75 to ?5° C.
    Type: Application
    Filed: December 29, 2020
    Publication date: May 13, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA
  • Patent number: 10988652
    Abstract: The present invention provides a method for using, as an alternative refrigerant for R404A that is currently widely used, a refrigerant that has, for example, a non-flammability similar to that of R404A, a refrigerating capacity that can replace that of R404A, a COP equal or superior to that of R404A, and a lower GWP than that of R404A, as a refrigerant for a cooling system; as well as a refrigeration unit using the refrigerant. The method uses a mixture of fluorinated hydrocarbons as a refrigerant, (1) the mixture comprising difluoromethane (R32), pentafluoroethane (R125) and 1,1,1,2-tetrafluoroethane (R134a) in amounts such that the sum of the concentrations thereof is 99.5 wt % or more; (2) the composition ratio of the fluorinated hydrocarbons contained in the mixture falling within a triangle having, as vertices, the following three points in a ternary composition diagram in which the sum of the concentrations of R32, R125, and R134a is 100 wt %, point A (R32/R125/R134a=37.3/17.0/45.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: April 27, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi Itano, Yasufu Yamada, Tatsumi Tsuchiya, Hitomi Kuroki
  • Patent number: 10968378
    Abstract: The present invention provides a highly stable haloolefin-based composition that inhibits decomposition or oxidization. The haloolefin-based composition comprising (a) a haloolefin; (b) at least one compound selected from the group consisting of HFO-1234ze, HFC-254eb, HFO-1243zf, HFC-245eb, HFC-245fa, HFC-245cb, HFC-236ea, HFC-236fa, HFO-1225ye, 3,3,3-trifluoropropine, HFC-23, HFC-32, HFC-125, HFC-143a, HFC-134a, FC-1216, HCFO-1233xf, HCFO-1233zd, HCFO-1232xf, HCFO-1223xd, and chloromethane; and (c) water.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: April 6, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Tatsumi Tsuchiya, Yasufu Yamada
  • Publication number: 20210079277
    Abstract: This invention provides a composition comprising a compound that has low GWP in spite of having low flammability, and that is less likely to lead to a negative-pressure state during operation even when applied to a large air conditioner; and to a refrigerating machine, large air conditioner, or industrial process cooler, each comprising the composition. Specifically, the present invention provides a composition comprising a refrigerant, the refrigerant comprising a compound represented by the following general formula (1): CmHnFxCly (1), wherein m is 4?m?10, n+x+y is equal to 2m?2, and the compound has a triple bond in its molecule.
    Type: Application
    Filed: March 17, 2018
    Publication date: March 18, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuki YOTSUMOTO, Daisuke KARUBE, Yasufu YAMADA
  • Patent number: 10913881
    Abstract: The present invention provides a haloolefin-based composition comprising a highly-stable haloolefin in which decomposition and oxidization are inhibited, and the haloolefin-based composition being used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers. The present invention relates to a haloolefin-based composition comprising a haloolefin and water and being used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers. The haloolefin-based composition comprising a haloolefin and water is used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: February 9, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Tatsumi Tsuchiya, Yasufu Yamada
  • Patent number: 10858563
    Abstract: Provided is a method for transferring a refrigerant composition containing three components (difluoromethane, pentafluoroethane, and 1,1,1,2-tetrafluoroethane) such that the compositional change of the liquid phase due to the phase transition that occurs in the supply source when transferring the refrigerant composition falls within a tolerance range. The method for transferring a refrigerant composition containing difluoromethane, pentafluoroethane, and 1,1,1,2-tetrafluoroethane includes transferring a refrigerant composition from a liquid phase in a supply source to a supply destination, wherein the liquid phase of the refrigerant composition in the supply source before the transfer contains 32.5 to 33.5 wt % of difluoromethane, 14.3 to 16.0 wt % of pentafluoroethane, and 50.5 to 53.2 wt % of 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: December 8, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsumi Tsuchiya, Mitsushi Itano, Hitomi Kuroki, Yasufu Yamada
  • Publication number: 20200377777
    Abstract: The present disclosure provides a composition comprising a refrigerant characterized by having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein HFO-1132 (E) is present in an amount of 35.0 to 65.0 mass %, and HFO-1234yf is present in an amount of 65.0 to 35.0 mass %, based on the total mass of HFO-1132 (E) and HFO-1234yf, and wherein the refrigerant is for use in operating a refrigeration cycle in which the evaporation temperature is ?75 to ?5° C.
    Type: Application
    Filed: August 14, 2020
    Publication date: December 3, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Mitsushi ITANO, Yuuki YOTSUMOTO, Akihito MIZUNO, Tomoyuki GOTOU, Yasufu YAMADA
  • Publication number: 20200325374
    Abstract: The present invention provides a haloolefin-based composition comprising a highly-stable haloolefin in which decomposition and oxidization are inhibited, and the haloolefin-based composition being used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers. The present invention relates to a haloolefin-based composition comprising a haloolefin and water and being used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers. The haloolefin-based composition comprising a haloolefin and water is used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers.
    Type: Application
    Filed: June 25, 2020
    Publication date: October 15, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro TAKAHASHI, Tatsumi TSUCHIYA, Yasufu YAMADA
  • Patent number: 10800958
    Abstract: The present invention provides a refrigerant composition that has a low GWP and ASHRAE non-flammability performance. Specifically, the present invention provides a composition comprising a mixture of fluorinated hydrocarbons, the mixture comprising difluoromethane (R32), pentafluoroethane (R125), 1,1,1,2-tetrafluoroethane (R134a), and 2,3,3,3-tetrafluoropropene (1234yf) at specific concentrations.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: October 13, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi Itano, Yasufu Yamada, Tatsumi Tsuchiya, Hitomi Kuroki
  • Publication number: 20200308463
    Abstract: The present invention provides a refrigerant composition that has a low GWP and ASHRAE non-flammability performance. Specifically, the present invention provides a composition comprising a mixture of fluorinated hydrocarbons, the mixture comprising difluoromethane (R32), pentafluoroethane (R125), 1,1,1,2-tetrafluoroethane (R134a), and 2,3,3,3-tetrafluoropropene (1234yf) at specific concentrations.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 1, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Yasufu YAMADA, Tatsumi TSUCHIYA, Hitomi KUROKI
  • Publication number: 20200263069
    Abstract: The present invention provides a highly stable haloolefin-based composition that inhibits decomposition or oxidization. The haloolefin-based composition comprising (a) a haloolefin; (b) at least one compound selected from the group consisting of HFO-1234ze, HFC-254eb, HFO-1243zf, HFC-245eb, HFC-245fa, HFC-245cb, HFC-236ea, HFC-236fa, HFO-1225ye, 3,3,3-trifluoropropine, HFC-23, HFC-32, HFC-125, HFC-143a, HFC-134a, FC-1216, HCFO-1233xf, HCFO-1233zd, HCFO-1232xf, HCFO-1223xd, and chloromethane; and (c) water.
    Type: Application
    Filed: May 7, 2020
    Publication date: August 20, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro TAKAHASHI, Tatsumi TSUCHIYA, Yasufu YAMADA
  • Patent number: 10731065
    Abstract: The present invention provides a haloolefin-based composition comprising a highly-stable haloolefin in which decomposition and oxidization are inhibited, and the haloolefin-based composition being used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers. The present invention relates to a haloolefin-based composition comprising a haloolefin and water and being used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers. The haloolefin-based composition comprising a haloolefin and water is used for at least one application selected from the group consisting of heat transfer media, refrigerants, foaming agents, solvents, cleaning agents, propellants, and fire extinguishers.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: August 4, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Tatsumi Tsuchiya, Yasufu Yamada
  • Patent number: 10669464
    Abstract: The present invention provides a highly stable haloolefin-based composition that inhibits decomposition or oxidization. The haloolefin-based composition comprising (a) a haloolefin; (b) at least one compound selected from the group consisting of HFO-1234ze, HFC-254eb, HFO-1243zf, HFC-245eb, HFC-245fa, HFC-245cb, HFC-236ea, HFC-236fa, HFO-1225ye, 3,3,3-trifluoropropine, HFC-23, HFC-32, HFC-125, HFC-143a, HFC-134a, FC-1216, HCFO-1233xf, HCFO-1233zd, HCFO-1232xf, HCFO-1223xd, and chloromethane; and (c) water.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: June 2, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Tatsumi Tsuchiya, Yasufu Yamada
  • Patent number: 10619082
    Abstract: An object of the present invention is to provide a refrigerant composition having a reduced amount of comprehensive environmental load, in which the refrigerant composition has low GWP (direct impact on global warming is low), and has good energy efficiency (indirect impact on global warming is low) when used in a device. The present invention provides a refrigerant composition comprising 30 to 50 mass % of difluoromethane (HFC32) and 70 to 50 mass % of 2,3,3,3-tetrafluoropropene (HFO1234yf).
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: April 14, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi Shibanuma, Yasufu Yamada