Patents Assigned to Daikin Industries, Ltd.
  • Patent number: 10670282
    Abstract: To reduce noise coming from an indoor unit in an air conditioning apparatus that has an outdoor unit that has a compressor and an outdoor heat exchanger, the indoor unit that has an indoor heat exchanger, and a liquid refrigerant connection pipe and a gas refrigerant connection pipe that interconnect both units and in which a liquid pressure adjusting expansion valve that reduces a pressure of a refrigerant flowing through the liquid refrigerant connection pipe in such a way that the refrigerant is in a gas-liquid two-phase state is provided in an outdoor liquid refrigerant pipe that interconnects the liquid-side end of the outdoor heat exchanger and the liquid refrigerant connection pipe. An external expansion valve unit having an external expansion valve that further reduces the pressure of the refrigerant whose pressure has been reduced in the liquid pressure adjusting expansion valve is provided in the outdoor liquid refrigerant pipe.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: June 2, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro Yamada, Masahiro Honda, Yuusuke Nakagawa, Yuusuke Oka
  • Patent number: 10667738
    Abstract: A brain activity estimation device includes a facial skin temperature acquisition element and a brain activity estimation element. The acquisition element detects a skin temperature of at least part of a human face, and acquires facial skin temperature data including detected temperature data and location data of a detection region in a time series manner. The estimation element estimates human brain activity based on the facial skin temperature data acquired. The estimation element decomposes the facial skin temperature data into a plurality of components, extracts a component as a determination component, and determines whether the determination component is related to the human brain activity based on a presence or absence of a temperature change in a prescribed region of the human face.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 2, 2020
    Assignees: Daikin Industries, Ltd., Tokyo Institute of Technology
    Inventors: Junichiro Arai, Yasunori Kotani, Taro Tomatsu, Yoshimi Ohgami
  • Patent number: 10673359
    Abstract: A detector detects whether or not a first line induced voltage and a second line induced voltage match each other, the first line induced voltage being a potential difference of a first phase potential of phase potentials relative to a reference potential, and the second line induced voltage being a potential difference of a second phase potential of the phase potentials other than the first phase potential relative to the reference potential. The phase potentials is outputted by the armature due to an induced electromotive force. The reference potential is any one of a minimum phase and a maximum phase. A rotation-position setting unit sets, to a predetermined value, an estimation value of a rotation position of the motor 2 at a point in time when the first line induced voltage and the second line induced voltage match each other.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: June 2, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Hiroshi Hibino
  • Patent number: 10670290
    Abstract: Electricity wasting due to an unnecessary operation is prevented and the usability is improved. A multi air conditioner includes an outdoor unit, a first indoor unit and a second indoor unit. The first indoor unit and the second indoor unit are connected to the outdoor unit and are respectively disposed in different rooms. When the first indoor unit is operated based on a first operating mode, if an operation start instruction based on a second operating mode which is different from the first operating mode is sent to the second indoor unit from a remote controller without using an internet (S5: YES, S7: NO), the first indoor unit becomes an operation stop state and the second indoor unit starts an operation based on the second operating mode on condition that the last instruction to the first indoor unit is sent from a smart phone via the internet (S9: YES) (S12).
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: June 2, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Takashige Mori
  • 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: 10666143
    Abstract: A normalized-link-current estimation unit adopts a first value calculated by using a virtual DC voltage command, a phase and an amplitude of a single-phase AC voltage, and a distribution factor, as an estimated value of a value obtained by normalizing a link current flowing from a DC link to an inverter. A calculation unit determines a second value calculated by using the virtual DC voltage command, a rectified voltage, and a both-end voltage. When a normalized current command is less than a product of the first value and the second value, a normalized charge command is set to 0 and a rectifying duty is determined by dividing the normalized current command by the first value.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 26, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Kenichi Sakakibara
  • Patent number: 10662324
    Abstract: The invention provides a processing aid enabling short-time disappearance of melt fracture occurred in extrusion-molding a melt-fabricable resin at a high shear rate, a great reduction in extrusion pressure, and production of molded articles with good appearance. The processing aid contains a polymer containing a fluorine-containing elastomeric polymer segment and a fluorine-containing non-elastomeric polymer segment.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: May 26, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Ken Okanishi, Yoshichika Komiya, Takafumi Yamato, Tsuyoshi Miyamori
  • Publication number: 20200157028
    Abstract: This invention provides a composition that contains PFOB with a PFOA content lower than that of known PFOB, and that is less likely to have an adverse effect on the environment; and provides a method for producing PFOB. The composition contains C8F17Brand further contains C7F15COOH, wherein C7F15COOH is present in a concentration of 25 ppb or less based on the total weight of C8F17Br. The method for producing C8F17Br comprises reacting C8F17I and a brominating agent to obtain C8F17Br, and alkali-washing the obtained C8F17Br to reduce the C7F15COOH content to 25 ppb or less based on the total weight of C8F17Br.
    Type: Application
    Filed: July 3, 2018
    Publication date: May 21, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshichika KUROKI, Masahiro HIGASHI, Yoshihiro YAMAMOTO
  • Publication number: 20200158373
    Abstract: An air conditioning indoor unit includes: a main body that includes: a top side; a bottom side; a side part that connects the top side to the bottom side; and an intake surface on the side part; a blow-out panel that covers the bottom side of the main body and that includes a blow-out port; an axial fan inside the main body; a heat exchanger inside the intake surface; and an electric component under the axial fan. The axial fan has an axial direction orthogonal to the top side, and an intake side and a blow-out side when the axial fan is in rotation. The blow-out side is disposed on a lower side of the axial fan and faces the blow-out panel. The heat exchanger surrounds the axial fan.
    Type: Application
    Filed: June 22, 2018
    Publication date: May 21, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shunbo Yang, Wenqing Wu, Shengfei Yu
  • Publication number: 20200158129
    Abstract: In a blade of a propeller fan, an inclination angle (?) is made by a straight line passing through an outer circumferential side end and an inner circumferential side end of a radial cross section of the blade with a second plane orthogonal to a center axis of a hub. In a blade end of the blade, one end in front of the other end viewed in the rotation direction of the propeller fan is a leading blade end, while the other end behind the leading blade end is a trailing blade end. The blade is shaped such that the inclination angle (?) monotonically increases, in the direction from the intermediate position toward the trailing blade end, in an area extending from an intermediate position between the leading blade end and the trailing blade end to the trailing blade end.
    Type: Application
    Filed: April 6, 2018
    Publication date: May 21, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tooru IWATA, Hirotaka TOMIOKA
  • Patent number: 10655917
    Abstract: A heat exchanger for an air conditioning device includes flat tubes, a vertically extending header collecting tube connected to the flat tubes, and fins joined to the flat tubes. The header collection tube has a loop structure including partition members, inflow ports, and upper and lower communicating passages. The partition members partition first and second spaces. The flat tubes are connected at the first spaces. The inflow ports are located in lower parts of the first spaces. The upper communicating passages communicate the upper parts of the first and second spaces to guide refrigerant from the first spaces into the second spaces. The lower communicating passages communicate the lower parts of the first and second spaces to guide refrigerant from the second spaces towards spaces above the inflow ports in the first spaces to return the refrigerant from the second spaces to the first spaces.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: May 19, 2020
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Inoue, Hirokazu Fujino, Masanori Jindou, Kousuke Morimoto
  • Patent number: 10654775
    Abstract: The method according to this disclosure is a method for separating an unsaturated hydrocarbon having 2 or 3 carbon atoms and a halogenated unsaturated carbon compound formed by replacing at least one of hydrogen atoms included in the unsaturated hydrocarbon with a fluorine atom, from each other and is a method for selectively adsorbing either the unsaturated hydrocarbon or the halogenated unsaturated carbon compound by a porous coordination polymer that includes a metallic ion having a valence of 2 to 4 and an aromatic anion having 1 to 6 aromatic ring(s).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 19, 2020
    Assignees: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITY
    Inventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
  • Patent number: 10655885
    Abstract: Entrance of cold air from near a wall of an indoor space is avoided. An airflow direction adjusting flap is provided at a main outlet opening, and changes the direction of airflow coming from the main outlet opening in a vertical direction. A load detector detects a load of an indoor space. When the load of the indoor space is higher than a predetermined value in a heating operation, the airflow direction adjusting flap guides the air coming from the main outlet opening in a horizontal direction or in an upward direction with respect to the horizontal direction.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: May 19, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Nobuyuki Kojima, Akira Komatsu, Ryouta Suhara, Masaaki Murata, Natsumi Furo
  • Patent number: 10655884
    Abstract: An air conditioner includes a plurality of indoor units of a refrigerant circuit to perform air conditioning of a space, and an air conditioning controller that controls operations of the plurality of indoor units by allocating the indoor units individually to a plurality of predetermined areas of the space. The controller performs an area registration process of allocating the indoor units individually to a plurality of area identification frames corresponding to the areas, and allocating a plurality of ventilators individually to the area identification frames where the indoor units are allocated. The ventilators perform ventilation of the space. The controller does not allow the operations of the plurality of the indoor units when there is an area identification frame to which none of the ventilators is allocated, in the plurality of area identification frames where the indoor units are allocated.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: May 19, 2020
    Assignee: Daikin Industries, Ltd.
    Inventors: Tsutomu Iura, Yasuyuki Aisaka, Taiki Sunahata, Masashi Saitou
  • Patent number: 10655882
    Abstract: A remote management system includes an air conditioner, an information mediation device built in or connected to the air conditioner, an information management apparatus that acquires air conditioner information including items relating to the air conditioner via the information mediation device and a network, and a plurality of participant terminals. The terminals include one or more of a manager terminal, a manufacturer terminal, a seller terminal, a maintenance worker terminal, and a user terminal. The information mediation device transmits the air conditioner information to the information management apparatus at a certain transmission frequency. The information mediation device is able to change, according to a participant request input by each of the plurality of participant terminals, the items included in the air conditioner information to be transmitted or a transmission frequency relating to the transmission, or both.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: May 19, 2020
    Assignee: Daikin Industries, Ltd.
    Inventors: Erika Matsumoto, Hidehiko Hashimoto, Gou Nakatsuka
  • Publication number: 20200153018
    Abstract: A method for producing an electrolyte solution including a supply step of continuously supplying an emulsion based a polymer electrolyte and a solvent into a dissolution facility, and a dissolution step of continuously dissolving the polymer electrolyte in the solvent by heating the interior of the dissolution facility to obtain the electrolyte solution.
    Type: Application
    Filed: January 17, 2020
    Publication date: May 14, 2020
    Applicants: ASAHI KASEI KABUSHIKI KAISHA, DAIKIN INDUSTRIES, LTD.
    Inventors: Takahiro TAGO, Tetsuya MURAKAMI, Kazuhiro OHTSUKA
  • Publication number: 20200148929
    Abstract: Provided is a refrigerant composition that has a low GWP; is non-flammable or mildly flammable; and has a refrigerating capacity (Cap) and/or coefficient of performance (COP) equivalent to or higher than those of traditional refrigerants, such as R-134a, R-410A, R-123, or R-404A, when used as an alternative refrigerant for these traditional refrigerants. Specifically, provided is a refrigerant composition containing FO-1216 and a hydrofluoroolefin, wherein the hydrofluoroolefin is at least one member of HFO-1234ze and HFO-1243zf.
    Type: Application
    Filed: June 27, 2018
    Publication date: May 14, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuki YOTSUMOTO, Ikumi TOMOTSUKA, Akihito MIZUNO, Yuzo KOMATSU
  • Publication number: 20200148561
    Abstract: In a water passage, a first inflow-side insulator, a second inflow-side insulator, and an electric-discharge water tank are each formed like a sealed container. A tap water pipe is connected to the electric-discharge water tank via inflow-side insulators, and the electric-discharge water tank is connected to water supply headers. The water passage has a hermetic structure that is open to the atmosphere only at a supply opening of each of the water supply headers. Therefore, when pressurized tap water is supplied to the water passage, water flows through the water passage. As a result, restrictions on the positional relationship between a supply target of treated water and a water treatment device are reduced, and the usability of the water treatment device is improved.
    Type: Application
    Filed: March 13, 2018
    Publication date: May 14, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tsunahiro OHDOU, Masaya NISHIMURA, Kei SUZUMURA
  • Patent number: 10651757
    Abstract: An inverter device includes a converter section, an inverter section, and a control device. The converter section full-wave rectifies a three-phase AC voltage and outputs a DC voltage including a ripple component having a frequency six times the frequency of the three-phase AC voltage. The inverter section converts the DC voltage including the ripple component from the converter section into an AC voltage and outputs the AC voltage to a motor. The control device, in a rotating coordinate in which an N-pole direction of a permanent magnet embedded in a rotor of the motor is taken as a d-axis and a direction orthogonal to the d-axis is taken as a q-axis, controls the inverter section so that a phase of a d-axis voltage Vd of the ripple component included in the DC voltage leads a phase of a q-axis voltage Vq.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: May 12, 2020
    Assignee: Daikin Industries, Ltd.
    Inventors: Nobuki Kitano, Tatsuki Inoue
  • Patent number: D884133
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: May 12, 2020
    Assignee: DAIKIN INDUSTRIES LTD.
    Inventor: Daiki Nakamori