Patents by Inventor Hidetomo Nakagawa

Hidetomo Nakagawa 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).

  • Patent number: 11353272
    Abstract: A heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus are provided where heat exchange performance is improved, and drainage properties and resistance against frost formation are improved. A flat tube and a plurality of fins that are each a plate having a plate surface extending in a longitudinal direction and in a width direction orthogonal to the longitudinal direction are provided. The plate surface intersects a pipe axis of the flat tube, and the plurality of fins are arranged at an interval from one another. The plurality of fins each have a first spacer formed in the plate and maintaining the interval. The flat tube has a longitudinal axis of a section perpendicular to the pipe axis, and the longitudinal axis is inclined to the width direction by an inclination angle ?. The first spacer has a standing surface extending in a direction intersecting the plate surface.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: June 7, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Yatsuyanagi, Tsuyoshi Maeda, Tomohiko Takahashi, Yoshihide Asai, Hidetomo Nakagawa
  • Patent number: 11335813
    Abstract: A semiconductor device in which the accuracy of arithmetic operation is increased by correction of the threshold voltage of a transistor can be provided. The semiconductor device includes first and second current supply circuits, and the second current supply circuit has the same configuration as the first current supply circuit. The first current supply circuit includes first and second transistors, a first capacitor, and first to third nodes. A first terminal of the first transistor is electrically connected to the first node, and a back gate of the first transistor is electrically connected to a first terminal of the second transistor and a first terminal of the first capacitor. A gate of the first transistor is electrically connected to the second node, and a second terminal of the first capacitor is electrically connected to a second terminal of the first transistor.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: May 17, 2022
    Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Hidetomo Kobayashi, Takayuki Ikeda, Takashi Nakagawa, Takeya Hirose, Shuichi Katsui
  • Publication number: 20210239409
    Abstract: A heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus are provided where heat exchange performance is improved, and drainage properties and resistance against frost formation are improved. A flat tube and a plurality of fins that are each a plate having a plate surface extending in a longitudinal direction and in a width direction orthogonal to the longitudinal direction are provided. The plate surface intersects a pipe axis of the flat tube, and the plurality of fins are arranged at an interval from one another. The plurality of fins each have a first spacer formed in the plate and maintaining the interval. The flat tube has a longitudinal axis of a section perpendicular to the pipe axis, and the longitudinal axis is inclined to the width direction by an inclination angle ?. The first spacer has a standing surface extending in a direction intersecting the plate surface.
    Type: Application
    Filed: June 13, 2018
    Publication date: August 5, 2021
    Inventors: Akira YATSUYANAGI, Tsuyoshi MAEDA, Tomohiko TAKAHASHI, Yoshihide ASAI, Hidetomo NAKAGAWA
  • Publication number: 20210180878
    Abstract: A heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus are provided where deterioration in drainage and ventilation properties is prevented, an air passage is not easily clogged when frost forms, and both defrosting properties and heat exchange performance are achieved. A flat tube and a plurality of fins that are each a plate having a plate surface extending in a longitudinal direction and in a width direction orthogonal to the longitudinal direction are provided. The plate surface intersects a pipe axis of the flat tube. The plurality of fins each have an insertion portion in which the flat tube is inserted, a first spacer formed at a rim of the insertion portion and maintaining the interval, and a second spacer formed at a portion of the plate other than the rim of the insertion portion and maintaining the interval.
    Type: Application
    Filed: June 13, 2018
    Publication date: June 17, 2021
    Inventors: Tsuyoshi MAEDA, Akira YATSUYANAGI, Tomohiko TAKAHASHI, Yoshihide ASAI, Hidetomo NAKAGAWA
  • Patent number: 10767656
    Abstract: In an axial flow fan according to the present invention, a plurality of blades rotate about a rotation axis of the blades to convey a fluid. In the axial flow fan, the plurality of blades each have a leading edge at a leading side in a rotational direction, a trailing edge at a trailing side in the rotational direction, and an outer peripheral edge connecting the leading edge and the trailing edge. The leading edge of one of the plurality of blades and the trailing edge of another blade adjacent to the leading edge of the blade in the rotational direction are connected by a plate-shaped connection portion. The plurality of blades each have at least one plate-shaped reinforcement rib extending from a periphery of the rotation axis toward the outer peripheral edge of the blade.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: September 8, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Hamada, Koji Sachimoto, Yosuke Kikuchi, Hajime Ikeda, Takashi Kobayashi, Seiji Hirakawa, Hiroshi Yoshikawa, Hidetomo Nakagawa, Hiroaki Makino
  • Publication number: 20200158353
    Abstract: An air-conditioning outdoor unit includes a compressor having a plurality of terminals each including a plurality of conductive pins. The outdoor unit includes a plurality of lead wire groups provided for the respective terminals and each including a plurality of lead wires connecting a control board to the plurality of conductive pins, and a plurality of different end connectors provided for the respective lead wire groups and each attached to an end portion of the lead wire group adjacent to the plurality of conductive pins. The lead wire groups are each connected by the end connector to the plurality of conductive pins and cut into two parts at a given point in a longitudinal direction. The two parts of the lead wire group are detachably coupled together at the given point by a pair of relay connectors. A length from the control board to the given point and a length from the given point to the end connector differ from one lead wire group to another.
    Type: Application
    Filed: February 13, 2018
    Publication date: May 21, 2020
    Inventors: Hidetomo NAKAGAWA, Akinori SAKABE, Toshiyuk KUBONO, Hiroyuki JINNAI
  • Publication number: 20190178507
    Abstract: An outdoor unit for an air-conditioning apparatus includes a heat exchanger including a plurality of heat exchanger units. The plurality of heat exchanger units are vertically stacked and each include a long side portion, a short side portion, and a corner portion bent and connecting the long side portion and the short side portion to each other. In the heat exchanger, deviation in an air flow direction that lies between ones of the plurality of heat exchanger units that are vertically adjacent to each other is larger at the short side portions than at the long side portions.
    Type: Application
    Filed: August 10, 2016
    Publication date: June 13, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Hidetomo NAKAGAWA
  • Publication number: 20180003190
    Abstract: In an axial flow fan according to the present invention, a plurality of blades rotate about a rotation axis of the blades to convey a fluid. In the axial flow fan, the plurality of blades each have a leading edge at a leading side in a rotational direction, a trailing edge at a trailing side in the rotational direction, and an outer peripheral edge connecting the leading edge and the trailing edge. The leading edge of one of the plurality of blades and the trailing edge of another blade adjacent to the leading edge of the blade in the rotational direction are connected by a plate-shaped connection portion. The plurality of blades each have at least one plate-shaped reinforcement rib extending from a periphery of the rotation axis toward the outer peripheral edge of the blade.
    Type: Application
    Filed: August 3, 2015
    Publication date: January 4, 2018
    Inventors: Shingo HAMADA, Koji SACHIMOTO, Yosuke KIKUCHI, Hajime IKEDA, Takashi KOBAYASHI, Seiji HIRAKAWA, Hiroshi YOSHIKAWA, Hidetomo NAKAGAWA, Hiroaki MAKINO
  • Patent number: 9857095
    Abstract: In an indoor unit for an air-conditioning apparatus, a casing has an air inlet formed in an upper part and an air outlet formed below a front part. The casing accommodates a heat exchanger and fan. A horizontal airflow-direction louver is mounted pivotally inside the air outlet to guide airflow in a horizontally changeable manner. A vertical airflow-direction louver is mounted to cover the air outlet in a closed position and to guide airflow in a vertically changeable manner. An infrared sensor projects downward from the casing at a position in a horizontal end portion of the casing and in front of the air outlet. An airflow blocking portion is located behind the infrared sensor, and has a side wall on or beside one edge of the air outlet. The side wall is located closer to a center of the air outlet in the horizontal direction than the infrared sensor.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: January 2, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Hirakawa, Hidetomo Nakagawa, Nobutaka Tanabe, Motoshi Tezuka
  • Publication number: 20160033162
    Abstract: An indoor unit for an air-conditioning apparatus includes: a casing having an air inlet formed in an upper part of the casing and an air outlet formed below a front part of the casing, the casing accommodating therein a heat exchanger and a fan; at least one horizontal airflow-direction louver mounted pivotally inside the air outlet to guide airflow through the air outlet in a horizontally changeable manner; at least one vertical airflow-direction louver mounted to cover the air outlet in a closed position and to guide airflow through the air outlet in a vertically changeable manner; an infrared sensor projecting downward from the casing at a position in a horizontal end portion of the casing and in front of the air outlet; and at least one airflow blocking portion located behind the infrared sensor, the at least one airflow blocking portion having a side wall on or beside one edge of the air outlet, the side wall located closer to a center of the air outlet in the horizontal direction than the infrared senso
    Type: Application
    Filed: July 30, 2015
    Publication date: February 4, 2016
    Inventors: Seiji HIRAKAWA, Hidetomo NAKAGAWA, Nobutaka TANABE, Motoshi TEZUKA
  • Patent number: 8826678
    Abstract: In an air conditioner according to the present invention, an indoor unit includes an indoor air temperature detection unit to detect an indoor air temperature, a floor/wall/ceiling temperature detection unit to detect a floor and wall temperature and a ceiling ambient temperature, and a control device including a microcomputer in which a program relating to control of the air conditioner is embedded, wherein, in heating operation or ventilation operation, the control device performs circulator operation of moving air accumulating near a ceiling to a floor when the ceiling ambient temperature detected by the floor/wall/ceiling temperature detection unit becomes higher, by a predetermined threshold value or more, than an indoor air preset temperature set by a user.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: September 9, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hidetomo Nakagawa, Yoshikuni Kataoka
  • Patent number: 8801850
    Abstract: A coating composition including ultrafine silica particles having an average particle diameter of 15 nm or less and fluororesin particles, in which ultrafine silica particle content is 0.1 to 5 mass %, and the mass ratio of the ultrafine silica particles to the fluororesin particles is 70:30 to 95:5. According to the coating composition, there is provided a coating film which makes it possible to readily coat the surfaces of various articles without impairing the color tone and the texture and which is excellent in antisoiling performance and durability.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasuhiro Yoshida, Yoshinori Yamamoto, Teruhiko Kumada, Reiji Morioka, Toshiaki Yoshikawa, Yoshinori Tanikawa, Tsukasa Takagi, Hidetomo Nakagawa
  • Publication number: 20120012297
    Abstract: In an air conditioner according to the present invention, an indoor unit includes an indoor air temperature detection unit to detect an indoor air temperature, a floor/wall/ceiling temperature detection unit to detect a floor and wall temperature and a ceiling ambient temperature, and a control device including a microcomputer in which a program relating to control of the air conditioner is embedded, wherein, in heating operation or ventilation operation, the control device performs circulator operation of moving air accumulating near a ceiling to a floor when the ceiling ambient temperature detected by the floor/wall/ceiling temperature detection unit becomes higher, by a predetermined threshold value or more, than an indoor air preset temperature set by a user.
    Type: Application
    Filed: April 15, 2011
    Publication date: January 19, 2012
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hidetomo Nakagawa, Yoshikuni Kataoka
  • Publication number: 20100096114
    Abstract: A coating composition including ultrafine silica particles having an average particle diameter of 15 nm or less and fluororesin particles, in which ultrafine silica particle content is 0.1 to 5 mass %, and the mass ratio of the ultrafine silica particles to the fluororesin particles is 70:30 to 95:5. According to the coating composition, there is provided a coating film which makes it possible to readily coat the surfaces of various articles without impairing the color tone and the texture and which is excellent in antisoiling performance and durability.
    Type: Application
    Filed: January 8, 2008
    Publication date: April 22, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yasuhiro Yoshida, Yoshinori Yamamoto, Teruhiko Kumada, Reiji Morioka, Toshiaki Yoshikawa, Yoshinori Tanikawa, Tsukasa Takagi, Hidetomo Nakagawa
  • Patent number: 6708516
    Abstract: An air conditioner having an air blower (1) for air blowing, a front heat exchanger (2) and a rear heat exchanger (3) respectively provided on the front side and the rear side of an indoor unit (10) so as to surround the air blower (1) and for carrying out heat exchange between the indoor air and a refrigerant, a rear drain pan (11) provided under this rear heat exchanger (3) and for receiving drained water, and an air blower air path (4) formed around the air blower (1) and narrowed near the front end portion of the drain pan (11). The lower portion of the rear heat exchanger (3) is located rearward in comparison with the upper portion of the rear heat exchanger (3) so as to be inclined backward.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: March 23, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hidetomo Nakagawa, Masao Nagano, Isao Funayama, Toshiaki Yoshikawa
  • Patent number: D782639
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: March 28, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Hamada, Koji Sachimoto, Yosuke Kikuchi, Hajime Ikeda, Takashi Kobayashi, Seiji Hirakawa, Hiroshi Yoshikawa, Hidetomo Nakagawa, Hiroaki Makino
  • Patent number: D787035
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: May 16, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Hamada, Katsumi Shibayama, Takashi Kitazumi, Katsuhiro Tozuka, Hiroshi Yoshikawa, Hiroaki Makino, Hidetomo Nakagawa
  • Patent number: D800889
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: October 24, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Hamada, Koji Sachimoto, Yosuke Kikuchi, Hajime Ikeda, Takashi Kobayashi, Seiji Hirakawa, Hiroshi Yoshikawa, Hidetomo Nakagawa, Hiroaki Makino
  • Patent number: D800890
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: October 24, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Hamada, Koji Sachimoto, Yosuke Kikuchi, Hajime Ikeda, Takashi Kobayashi, Seiji Hirakawa, Hiroshi Yoshikawa, Hidetomo Nakagawa, Hiroaki Makino
  • Patent number: D803378
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: November 21, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Hamada, Koji Sachimoto, Yosuke Kikuchi, Hajime Ikeda, Takashi Kobayashi, Seiji Hirakawa, Hiroshi Yoshikawa, Hidetomo Nakagawa, Hiroaki Makino