Patents Assigned to Daikin Industries, Ltd.
  • Publication number: 20200220066
    Abstract: The present invention relates to a pressure signal detection circuit and a pressure signal detection method in which a pyroelectric signal from a piezoelectric film is suppressed. More specifically, the pressure signal detection circuit receives input of an input signal from a piezoelectric film, differentiates the input signal for signal component analysis of the input signal, outputs the signal analysis value of the input signal based on the differential value, removes offset of the input signal by using the signal component analysis value, integrates the input signal, and outputs a pressure input signal value from which a heat input signal value is removed. With this structure, the present invention reduces the influence on the thermal reaction as compared with prior art, while enabling pressure signal detection at a higher speed.
    Type: Application
    Filed: June 26, 2018
    Publication date: July 9, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hyunsik KIM, Takashi KANEMURA, Tetsuhiro KODANI, Kwan-Young HAN
  • 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
  • Patent number: 10703932
    Abstract: A surface-treating agent including at least one perfluoro(poly)ether group containing silane compound of the formula (1): wherein Rf, PFPE, Z, Q, R1, R2, X, Y, e, f, g, h and n are as defined herein. Also disclosed is a process for preparing the compound of formula (1).
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: July 7, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kenichi Katsukawa, Hisashi Mitsuhashi, Kensuke Mohara, Tomohiro Yoshida, Masatoshi Nose, Takashi Namikawa
  • Patent number: 10704554
    Abstract: A cross-flow fan made of resin includes first and second fan blocks joined together. The first fan block includes a first support plate, plural first blades connected to the first support plate, and a first outer peripheral ring having a first ring portion that interconnects outer ends of the plural first blades. The second fan block includes a second support plate, plural second blades having second one-side distal ends connected to the second support plate, and a second outer peripheral ring having a second ring portion that interconnects outer ends of the plural second blades adjacent second other-side distal ends of the plural second blades. The second other-side distal ends of the plural second blades are joined to the first support plate, and the first support plate and the second outer peripheral ring are disposed adjacent to each other.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: July 7, 2020
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Nakai, Nobuyasu Ichikawa
  • Patent number: 10697474
    Abstract: An impeller of a centrifugal fan includes multiple blades arranged annularly around a rotational axis, a main plate, a shroud, main plate-side welded portions between main plate-side blade axial ends of the blades and the main plate, and shroud-side welded portions between shroud-side blade axial ends of the blades and the shroud. The main plate is arranged opposite to main plate-side blade axial ends. The shroud is arranged opposite to shroud-side blade axial ends. The main plate-side welded portions have main plate-side welding holes that are recesses extending through the main plate to portions of the main plate-side blade axial ends. The shroud-side welded portions have shroud-side welding holes that are recesses extending through the shroud to portions of the shroud-side blade axial ends.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: June 30, 2020
    Assignee: Daikin Industries, Ltd.
    Inventor: Shigeo Kumaou
  • Patent number: 10696788
    Abstract: The present invention provides a compound represented by general formula (A1) or (A2): R1—(PE1-Y)n—PE2-X—(SiRakRblRcm)???(A1) (RcmRblRakSi)?—X—(PE1-Y)n—PE2-X—(SiRakRblRcm)???(A2) wherein each of symbols is as defined in the description.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: June 30, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshiaki Honda, Nozomi Katsuma, Reina Moriyasu
  • Publication number: 20200199429
    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: May 15, 2018
    Publication date: June 25, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mitsushi ITANO, Shun OHKUBO, Hitomi KUROKI, Tatsumi TSUCHIYA, Kenji GOBOU
  • Publication number: 20200203769
    Abstract: An electrolyte solution for a lithium ion secondary battery, containing a compound (1) represented by the following formula (1): wherein R1 and R2 are each independently a C1-C4 alkyl group optionally containing an ether bond, and wherein chloride ion is present at a concentration of 1.0×10?6 to 1.0×103 ppm. Also disclosed is an electrolyte solution for a lithium ion secondary battery, containing an imidazolium cation (1-1) represented by the following formula (1-1), a bis(oxalato)borate anion, and a hexafluorophosphate anion, the formula (1-1) being: wherein R1 and R2 are each independently a C1-C4 alkyl group optionally containing an ether bond, and wherein chloride ion is present at a concentration of 1.0×10?6 to 1.0×103 ppm.
    Type: Application
    Filed: July 12, 2018
    Publication date: June 25, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hisako NAKAMURA, Shigeaki YAMAZAKI, Kenzou TAKAHASHI, Yuuki SUZUKI, Akiyoshi YAMAUCHI, Kotaro HAYASHI
  • Publication number: 20200199051
    Abstract: An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.
    Type: Application
    Filed: June 15, 2018
    Publication date: June 25, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuko OHHIGASHI, Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI
  • Patent number: 10688448
    Abstract: The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: June 23, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shinichi Chaen, Taku Yamanaka, Kohei Yasuda, Masahiko Yamada, Nobuki Uraoka, Tomohisa Konishi, Kunihiko Inui, Yoshiyuki Shibuya, Makoto Ono
  • Patent number: 10693334
    Abstract: A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. The armature windings are configured by a first winding and at least one second winding. The field winding passes over the permanent magnet. The second windings each have a part embedded between a coil end of the field winding and teeth around which the field winding is around.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: June 23, 2020
    Assignees: DAIKIN INDUSTRIES, LTD., NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Yoshinari Asano, Toshinari Kondou, Yoshihito Sanga, Takashi Kosaka
  • Patent number: 10689615
    Abstract: A temperature-responsive substrate having on its surface a layer containing at least one polymer, the at least one polymer being responsive to temperature and containing a fluorine-containing monomer-derived unit. Also disclosed is a polymer and composition for use in producing the substrate, as well as methods for producing, using and evaluating the substrate.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: June 23, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Masamichi Morita, Kouji Kubota, Yoshiko Koizumi, Hiroki Yamaguchi
  • Patent number: 10690142
    Abstract: A blade of a cross-flow fan including leading and trailing edge portions arranged on inner and outer peripheral sides of the cross-flow, and a base portion formed between the edge portions. The edge portions are arc shaped. The base portion has a pressure surface and a suction surface. A radius of the leading-edge portion is greater than a radius of the trailing-edge portion. A maximum thickness is at a position of maximum thickness that is closer to the leading-edge portion than to the trailing-edge portion. A first thickness is at midpoint of a blade chord. A second thickness is at a position set apart from an outer-peripheral end of the blade chord by 5% of the chord length. A value obtained by dividing the first thickness by the maximum thickness that is greater than a value obtained by dividing the second thickness by the first thickness.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: June 23, 2020
    Assignee: Daikin Industries, Ltd.
    Inventor: Masafumi Uda
  • Patent number: 10686351
    Abstract: Disclosed herein is a method for manufacturing a rotor, the method including an injection process of injecting a bonded magnet material into a cavity of a molding die generating a magnetic field in the cavity so that the bonded magnet material is poured into each of the magnet slots in the rotor core set in the cavity through one of openings of each magnet slot, wherein the molding die used in the injection process has gates which respectively open at positions corresponding to regions, each of which ensures a view from the one of openings to the other opening of the magnet slot along an axial center of the rotor core.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: June 16, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshitaka Okuyama, Yoshiki Yasuda, Yoshinari Asano
  • Patent number: 10686222
    Abstract: A method for manufacturing a phosphate, which includes reacting, in a solvent, an organophosphate represented by the following formula (2) and an alkali metal hydroxide in an amount of 1.01 mole equivalents or more relative to the organophosphate to provide a composition containing a phosphate represented by the following formula (1), the alkali metal hydroxide, and the solvent; and adding hydrogen fluoride to the composition to neutralize the composition and to precipitate an alkali metal fluoride, thereby providing a composition containing the precipitated alkali metal fluoride, the phosphate represented by the formula (1), and the solvent. The formula (1) is (R11O)(R12O)PO2M, where R11, R12 and M are as defined herein. The formula (2) is (R21O)(R22O)(R23O)PO, where R21, R22, and R23 are as defined herein.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: June 16, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Atsushi Maruo, Shigeaki Yamazaki, Hideo Sakata, Shinichi Kinoshita
  • Patent number: 10684050
    Abstract: Provided is a refrigeration apparatus in which adverse events caused by excess refrigerant can be suppressed even when defrosting is performed with some of a plurality of outdoor units designated as units to be defrosted. An air-conditioning apparatus is configured from a parallel connection of a first outdoor unit and a second outdoor unit, wherein when a second outdoor heat exchanger of the second outdoor unit is caused to function as an evaporator while a first outdoor heat exchanger of the first outdoor unit is caused to function as a condenser to defrost the first outdoor heat exchanger, a refrigerant circuit has a flow channel that supplies some of the refrigerant flowing out of the first outdoor heat exchanger to the second outdoor heat exchanger and a flow channel that supplies the rest of the refrigerant flowing out of the first outdoor heat exchanger to an indoor heat exchanger.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: June 16, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Ryuuta Ohura, Takuya Kotani, Junya Minami
  • Publication number: 20200182734
    Abstract: In a refrigerant circuit 12 using a zeotropic refrigerant, a gas leak amount is detected on the basis of the liquid temperature and the liquid pressure of a saturated liquid of the zeotropic refrigerant.
    Type: Application
    Filed: July 24, 2018
    Publication date: June 11, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Akitoshi UENO, Shougo MABUCHI
  • Publication number: 20200181386
    Abstract: The invention provides a fluoroelastomer composition that can be crosslinked at an industrially sufficient rate without the use of a graphene having specific surface properties and can provide a fluoroelastomer molded article having higher tensile strength and better abrasion resistance than conventional fluoroelastomer molded articles even though having a similar tensile modulus to conventional fluoroelastomer molded articles. The fluoroelastomer composition contains a fluoroelastomer that contains a crosslinkable group-containing monomer unit and an elongated sheet-shaped graphene. The graphene exhibits a ratio (L/W) of a maximum length (L) and a width (W) of 2 to 105, and the graphene exhibits a ratio (L/T) of the maximum length (L) and a thickness (T) of 1×101 to 1×107.
    Type: Application
    Filed: June 4, 2018
    Publication date: June 11, 2020
    Applicants: Tokyo Institute of Technology, Daikin Industries, Ltd.
    Inventors: Masatoshi SHIOYA, Kenta KUBO, Shinya MARUTA, Tsuyoshi NOGUCHI
  • Patent number: 10677477
    Abstract: A soundproof cover of a compressor for an air conditioner includes a sound-insulating material body portion (11) that is a rubber or thermoplastic-elastomer molded product with sound-insulating properties having a shape corresponding to an outer shape of a compressor body portion including a compressor leg portion positioned on a lower end side, having a folded portion (12) extending along a height direction of the compressor body portion and covering the compressor body portion by being folded through the folded portion (12), a sound-insulating material head portion (21) that is a rubber or thermoplastic-elastomer molded product with sound-insulating properties having a shape corresponding to an outer shape of a compressor head portion positioned on an upper end side of the compressor body portion and a sound absorbing material provided at least inside the sound-insulating material body portion (11).
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: June 9, 2020
    Assignees: DAIKIN INDUSTRIES, LTD., PARKER CORPORATION
    Inventors: Takashi Gotou, Katsutoshi Sakurai, Kenichi Maegaito, Keisuke Ono, Manabu Satou
  • Publication number: 20200172456
    Abstract: An object of the present invention is to provide a composition containing fluoromethane having high purity. A method for producing fluoromethane, comprising: pyrolyzing in a gas phase a fluorine-containing methyl ether represented by Formula (1): wherein R1 and R2 are the same or different, and each represents an optionally substituted linear or branched monovalent aliphatic hydrocarbon group, an optionally substituted monovalent aromatic hydrocarbon group, an optionally substituted monovalent cyclic aliphatic hydrocarbon group, hydrogen, or halogen, in the presence of an alumina catalyst to thereby obtain a mixed gas containing fluoromethane and acid fluoride, wherein: the alumina catalyst contains chlorine in an amount of 1.0 wt % or less.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shingo NAKAMURA, Yuusuke ETOU, Seiji TAKUBO, Katsuya NAKAI