Patents Assigned to Daikin Industries, Ltd.
  • Patent number: 11041666
    Abstract: Provided is a refrigeration apparatus that secures safety while suppressing an increase in cost. A refrigeration apparatus performs a refrigeration cycle in a refrigerant circuit including a compressor, a heat source-side heat exchanger, and a usage-side heat exchanger. The refrigeration apparatus comprises a usage-side fan providing an air flow, and a controller. The usage-side fan is disposed in a target space where inside air is cooled. The controller performs a refrigerant leak determination process to determine whether a refrigerant leak occurs, based on a state of a refrigerant in the refrigerant circuit. When the controller performs the refrigerant leak determination process to determine that a refrigerant leak occurs, then the controller performs leakage refrigerant agitation control to operate the usage-side fan so as to suppress local emergence of a region where the refrigerant leaks at a high concentration in the target space.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: June 22, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Satoru Sakae, Takahito Nakayama, Takenori Mezaki
  • Patent number: 11043699
    Abstract: The present disclosure provides a nonaqueous electrolyte solution that is used in a nonaqueous electrolyte secondary battery. The nonaqueous electrolyte solution contains a fluorinated solvent, a predetermined additive A and a predetermined additive B. A ratio (CA/CB) of concentration CA (mol/L) of the additive A and concentration CB (mol/L) of the additive B lies in a range of 1 to 30.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: June 22, 2021
    Assignees: Toyota Jidosha Kabushiki Kaisha, Daikin Industries, Ltd.
    Inventors: Toshiyuki Kawai, Hiroto Asano, Shigeaki Yamazaki, Shinichi Kinoshita
  • Patent number: 11043698
    Abstract: An electrolyte solution whose residual capacity is less likely to decrease and whose percentage increase in resistance is less likely to change even after stored at high temperature. The electrolyte solution contains a compound (1) represented by the following formula (1): R11CFX11(CH2)n11COOR12 wherein R11 is H, F, a C1-C3 non-fluorinated alkyl group, or a C1-C3 fluorinated alkyl group; X11 is H or F; R12 is a C1-C3 non-fluorinated alkyl group or a C1-C3 fluorinated alkyl group; and n11 is an integer of 0 to 3; a fluorinated carbonate; and a specific additive.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: June 22, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shigeaki Yamazaki, Kenzou Takahashi, Hiroyuki Arima, Hideo Sakata, Masakazu Kinoshita, Shinichi Kinoshita
  • Patent number: 11041476
    Abstract: An electric power information acquisition unit is provided for acquiring power supply-and-demand information including electric power acceptable to an electric power system or information correlated with the electric power. A fluid information acquisition unit is provided for acquiring fluid information including information correlated with a physical quantity of a fluid flowing out of a channel. A controller is provided for controlling at least one of the physical quantity, the channel or electric power generated or electric power to be generated by a generator by using the fluid information so that the physical quantity becomes equal to a desired value, while controlling electric power to be supplied to the electric power system to the electric power acceptable to the electric power system or less, by using the power supply-and-demand information.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: June 22, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takahiro Abe, Atsushi Suhara, Takahiro Yokoyama
  • Patent number: 11041061
    Abstract: The invention provides a polytetrafluoroethylene composition having high flowability. The polytetrafluoroethylene composition contains a particulate polytetrafluoroethylene having fibrillability and a particulate synthetic amorphous silica. The particulate polytetrafluoroethylene is a polytetrafluoroethylene fine powder or a polytetrafluoroethylene molding powder. The particulate synthetic amorphous silica is obtained by a dry process and has an average primary particle size smaller than 200 nm. The particulate synthetic amorphous silica is attached to the surface of the particulate polytetrafluoroethylene.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 22, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Noriko Iwata, Masayuki Tsuji, Kazuya Kawahara
  • Patent number: 11041642
    Abstract: In an indoor unit of an air conditioner that moves a front panel, a coupling member suppresses a reduction of heat exchange performance of the indoor unit. A heat exchanger has a U-shaped pipe that returns refrigerant flowing in a longitudinal direction. A panel drive unit generates a driving force that moves the front panel by a movement of the panel drive unit itself. The coupling member is disposed behind the front panel, couples the front panel and the panel drive unit, and transmits the driving force from the panel drive unit to the front panel. At least a part of the coupling member is disposed in front of the U-shaped pipe so as to overlap the U-shaped pipe as viewed from the front.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: June 22, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Kouji Satou
  • Patent number: 11041038
    Abstract: Provided is a water repellent composition which does not use a fluorine-containing monomer, especially a fluoroalkyl group-containing monomer. A water repellent composition which contains (1) (a) a polymer which has a repeating unit derived from an amide group-containing monomer that is represented by formula: (wherein R1 represents an organic residue having an ethylenically unsaturated polymerizable group; R2 represents a hydrocarbon group having 7-30 carbon atoms; and R3 represents a hydrocarbon group having 1-5 carbon atoms) in an amount of 2-100% by weight relative to the polymer, and (2) a liquid medium.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: June 22, 2021
    Assignees: DAIKIN INDUSTRIES, LTD., NOF CORPORATION
    Inventors: Yuuki Yamamoto, Norimasa Uesugi, Ikuo Yamamoto, Kei-ichi Maruyama, Mitsuhiro Fukushima, Muneaki Iizuka
  • Publication number: 20210180802
    Abstract: In an air-conditioning system including a thermal storage heat exchanger, a refrigerant circuit is configured such that an indoor heat exchanger and a receiver communicate with the thermal storage heat exchanger when an operational mode of the refrigerant circuit is switched to a cooling operation in which the thermal storage heat exchanger serves as a radiator and the indoor heat exchanger serves as an evaporator.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masanori UKIBUNE, Kouichi YASUO, Masao OHNO
  • Patent number: 11034785
    Abstract: Provided is a surface treatment agent which does not use fluorine-containing monomers, particularly fluoroalkyl group-containing monomers. Additionally, provided is a copolymer which includes a first polymer formed from first monomers, and a second polymer formed from second monomers. The copolymer does not include fluorine. The second polymer is polymerized in the presence of the first polymer. The first monomers include a long-chain acrylate ester monomer (a) represented by the formula CH2=CA11-C(?O)—O-A12 (in the formula, A11 represents hydrogen, a monovalent organic group, or a halogen, and A12 represents a C18-30 straight-chain or branched hydrocarbon group). The first monomers and the second monomers both include a halogenated olefin monomer (b).
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: June 15, 2021
    Assignees: DAIKIN INDUSTRIES, LTD., NISSIN CHEMICAL INDUSTRY CO., LTD
    Inventors: Rumi Kawabe, Masaki Fukumori, Ryosuke Hara, Masahiro Miyahara, Shinichi Minami, Ikuo Yamamoto, Yasuhiro Mitta, Akifumi Mitake
  • 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
  • Patent number: 11035379
    Abstract: A double-suction centrifugal fan includes: a first impeller coupled to a shaft; a second impeller provided with a second inlet port opened opposite to an electric motor and coupled to the shaft at a position farther from the electric motor than the first impeller; a first bell mouth connected to a first inlet port of the first impeller, and a second bell mouth connected to the second inlet port of the second impeller. An axial length L2 of the second bell mouth is greater than an axial length L1 of the first bell mouth.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: June 15, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Azumi Kojima, Takashi Kashihara
  • Patent number: 11035579
    Abstract: A refrigeration cycle apparatus includes a compressor, a refrigerant cooling pipe, a refrigerant-cycle constituent component, a connecting pipe and vibration transmission suppressing portion that is disposed on the connecting pipe that connects the refrigeration-cycle constituent component or the compressor and the refrigerant cooling pipe to each other.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: June 15, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazushi Hisayama, Tetsuya Okamoto, Yoshinobu Tsumura, Kebi Chen, Masanori Ukibune
  • Patent number: 11034634
    Abstract: A method for producing a fluorine-containing halogenated hydrocarbon comprising reacting a chlorine-containing compound and hydrogen fluoride in a vapor phase, and a separation step of separating a reaction product containing hydrogen fluoride, hydrogen chloride, and organic matter containing the fluorine-containing halogenated hydrocarbon into multiple components, the separation step comprising: separating the reaction product into a gas phase and a liquid phase, increasing the pressure of the liquid phase and supplying the liquid phase into a distillation column, compressing the gas phase and supplying the gas phase into the distillation column, separating a first stream containing the hydrogen chloride from the top of the distillation column, and separating a second stream containing the organic matter and the hydrogen fluoride from the bottom of the distillation column.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 15, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Tatsuya Takakuwa
  • Patent number: 11035337
    Abstract: A hydroelectric generation system includes a fluid machine disposed in a penstock or channel, a generator driven by the fluid machine, and a control unit configured to generate a predetermined torque in the generator. Fluid flows through the penstock or channel. The penstock or channel has a main path in which the fluid machine is disposed, and a detour disposed in parallel with the main path. The detour includes an on-off valve. The on-off valve is opened when not electrified, and closed when electrified.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: June 15, 2021
    Assignee: Daikin Industries, Ltd.
    Inventors: Takahiro Abe, Atsushi Suhara, Yoshiyuki Harada, Tomomi Sakamoto, Yusuke Irino
  • Publication number: 20210172445
    Abstract: Disclosed is a cross-flow fan including a fan rotor and a housing. The cross-flow fan has a blow-out path defined by first and second extension wall portions and two sidewalls. The first extension wall portion continuously extends from a tongue portion of the housing to the blow-out port. The second extension wall portion faces the first extension wall portion. The two sidewalls are respectively provided at axial ends of the fan rotor. The two sidewalls are formed such that the blow-out path has a narrowed portion whose cross-sectional area decreases as its cross-sectional shape changes from a rectangular shape to a trapezoidal shape from an upstream side toward a downstream side thereof, the trapezoidal shape having a portion near the second extension wall portion smaller in width than a portion near the first extension wall portion.
    Type: Application
    Filed: September 29, 2017
    Publication date: June 10, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi KASHIHARA, Jinfan RYUU, Hironobu TERAOKA
  • Publication number: 20210171815
    Abstract: Provided is a mixed refrigerant having two types of performance, i.e., a coefficient of performance that is equivalent to that 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 difluoromethane (R32) at specific concentrations.
    Type: Application
    Filed: December 18, 2018
    Publication date: June 10, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI
  • Patent number: 11028199
    Abstract: The invention provides a powder that is easily redispersible in a liquid medium such as water. The powder contains a fluoropolymer. The fluoropolymer contains at least one group A selected from the group consisting of —SO2Y, —COOR, —SO3X, —SO2NR12, and —COOX, wherein Y is a halogen atom; R is a C1-C4 alkyl group; X is M1/L or NR14, where M is a hydrogen atom or an L-valent metal, the L-valent metal being a metal in group 1, group 2, group 4, group 8, group 11, group 12, or group 13 of the periodic table; and R1s are each individually a hydrogen atom or a C1-C4 alkyl group. The powder exhibits a dispersion of 50% or higher. The dispersion is calculated by filtering a composition obtainable by mixing the powder with water through a mesh having an opening of 20 ?m.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: June 8, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuki Yotsumoto, Tadashi Ino, Kazuhiro Ohtsuka, Noriyuki Shinoki, Masaharu Nakazawa, Takashi Yoshimura, Masahiro Kondo
  • Patent number: 11028239
    Abstract: Provided is a method for producing low molecular weight polytetrafluoroethylene less likely to generate C6-C14 perfluorocarboxylic acids and salts thereof. The method for producing low molecular weight polytetrafluoroethylene includes: (1) feeding into an airtight container: high molecular weight polytetrafluoroethylene: and a gas mixture containing an inert gas and oxygen and having an oxygen content relative to the total of the inert gas and oxygen of 1 to 10 vol %; and (2) irradiating the high molecular weight polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a melt viscosity at 380° C. of 1.0×102 to 7.0×105 Pa·s.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: June 8, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Masayuki Tsuji, Hirotoshi Yoshida
  • Patent number: 11029067
    Abstract: A refrigeration apparatus includes a refrigerant circuit including a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger connected to each other, the refrigerant circuit being capable of executing at least a heating operation by circulating a refrigerant through the refrigerant circuit, and a control unit configured to start a defrosting operation for melting frost formed on the outdoor heat exchanger when a first defrosting start condition is satisfied in a case where a predetermined premise situation is not established and start the defrosting operation when a second defrosting start condition stricter than the first defrosting start condition is satisfied in a case where the predetermined premise situation is established. The predetermined premise situation is at least either a situation relating to unlikelihood of formation of frost on the outdoor heat exchanger progressing or a situation where a load of the heating operation is large.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: June 8, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: You Tomiyama, Naoki Moroi, Tatsuya Makino
  • Publication number: 20210161075
    Abstract: A CA system includes a gas supply device which performs a gas supply operation of supplying nitrogen-enriched air into a container, and a controller which performs the gas supply operation so that the inside air has a desired composition. The controller performs carbon dioxide priority control in which the controller performs the gas supply operation if an oxygen concentration of the inside air is equal to or higher than a ceiling concentration higher than a target oxygen concentration, stops the gas supply operation if a carbon dioxide concentration of the inside air is lowered to a critical concentration lower than a target carbon dioxide concentration, and restarts the gas supply operation if the carbon dioxide concentration of the inside air has reached a restart concentration higher than the target carbon dioxide concentration through breathing of the plants.
    Type: Application
    Filed: February 11, 2021
    Publication date: June 3, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Maho TAKAYAMA, Noritaka KAMEI, Yuusuke FUJIMOTO, Masataka NAKANO