Patents by Inventor Tatsumi Tsuchiya

Tatsumi Tsuchiya 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: 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: 20210284891
    Abstract: The present invention provides a heat transport device in which a hydrohaloolefin-containing refrigerant is enclosed in a circulation route, and the heat transport device is capable of reducing the influence of oxygen entrapped in the circulation route. The present invention also provides a heat transport method using the heat transport device. In the heat transport device 1, a refrigerant comprising at least one of hydrofluoroolefins (HFOs), hydrochlorofluoroolefins (HCFOs), or hydrochloroolefins (HCOs) is enclosed in a circulation route, and a stabilizer container comprising an acid scavenger and/or an antioxidant is disposed in the circulation route. The antioxidant is at least one member selected from the group consisting of alkylcatechols, alkoxyphenols, benzoquinones, phenothiazines, and phthalates, and the acid scavenger is at least one member selected from the group consisting of aliphatic alcohols, polyhydric alcohols, amines, terpenes, alkyl epoxides, and alkenyl tolyls.
    Type: Application
    Filed: October 31, 2017
    Publication date: September 16, 2021
    Inventors: Tatsumi TSUCHIYA, Kouhei KOBA, Masaru TANAKA
  • 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: 20210261841
    Abstract: 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: Application
    Filed: April 25, 2019
    Publication date: August 26, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Hitomi KUROKI, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
  • Publication number: 20210230467
    Abstract: 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: Application
    Filed: December 7, 2018
    Publication date: July 29, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Hitomi KUROKI, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
  • Publication number: 20210189208
    Abstract: 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: Application
    Filed: December 12, 2018
    Publication date: June 24, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
  • Patent number: 11034871
    Abstract: 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: Grant
    Filed: April 19, 2018
    Date of Patent: June 15, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi Itano, Shun Ohkubo, Hitomi Kuroki, Tatsumi Tsuchiya, Kenji Gobou
  • Publication number: 20210147734
    Abstract: 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: Application
    Filed: January 28, 2021
    Publication date: May 20, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
  • Publication number: 20210122961
    Abstract: 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: Application
    Filed: April 17, 2019
    Publication date: April 29, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Mitsushi ITANO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
  • 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
  • Publication number: 20210108120
    Abstract: 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: Application
    Filed: April 18, 2019
    Publication date: April 15, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Hitomi KUROKI, Shun OHKUBO, Tatsumi TSUCHIYA, Kenji GOBOU
  • 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
  • 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: 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
  • Publication number: 20200216735
    Abstract: 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: Application
    Filed: June 11, 2018
    Publication date: July 9, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU