Patents by Inventor Yuki UGAJIN

Yuki UGAJIN 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: 10941985
    Abstract: A heat exchanger includes a plurality of flat tubes provided to extend in a first direction, and a plurality of plate-shaped fins having respective surfaces extending in a second direction. The surface has a windward edge and a leeward edge. The plurality of flat tubes include a first flat tube disposed most windward in the second direction, and a second flat tube spaced apart from the first flat tube and disposed most leeward in the second direction. In the second direction, a distance between the leeward edge and a center of a flat shape of the second flat tube is at least one-third of a width between the windward edge and the leeward edge.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: March 9, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Daisuke Ito, Shin Nakamura, Yuki Ugajin, Tsuyoshi Maeda
  • Publication number: 20210003142
    Abstract: A propeller fan according to an embodiment of the present invention includes a shaft provided a rotation axis of the propeller fan, and a blade provided on an outer peripheral side of the shaft. The blade has a trailing edge on a rear side of the blade in a rotation direction of the propeller fan. The trailing edge includes a first trailing edge located on an innermost side of the trailing edge, and a second trailing edge adjacent to and outward of the first trailing edge. Where an innermost point of the first trailing edge is a first connection point, a connection point between the first trailing edge and the second trailing edge is a second connection point, and a straight line that extends through the rotation axis and the first connection point is a reference line, the second connection point is located forward of the reference line in the rotation direction, or located on the reference line, and the second trailing edge is located rearward of the second connection point in the rotation direction.
    Type: Application
    Filed: August 9, 2017
    Publication date: January 7, 2021
    Inventors: Takahide TADOKORO, Takuya TERAMOTO, Katsuyuki YAMAMOTO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
  • Publication number: 20210003140
    Abstract: A propeller fan includes a cylindrical shaft portion provided on a rotation axis of the propeller fan; a plurality of blades provided on an outer peripheral side of the shaft portion; a connection portion provided adjacent to the shaft portion and connecting two of the plurality of blades that are adjacent to each other in a circumferential direction of the propeller fan; a first rib provided on at least one of a pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on a downstream side in the flow of air, and a second rib provided on at least one of a negative-pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on an upstream side in the flow of air.
    Type: Application
    Filed: August 9, 2017
    Publication date: January 7, 2021
    Inventors: Katsuyuki YAMAMOTO, Takuya TERAMOTO, Takahide TADOKORO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
  • Publication number: 20200166048
    Abstract: A propeller fan includes a shaft portion disposed on a rotation axis, and a blade disposed on an outer peripheral side of the shaft portion and including a leading edge and a trailing edge. The blade includes a negative pressure surface in which a plurality of recesses are formed, and the plurality of recesses include a first recess and a second recess disposed on the trailing edge side than the first recess in a circumferential direction about the rotation axis as a center. The first recess has a depth larger than a depth of the second recess.
    Type: Application
    Filed: August 9, 2017
    Publication date: May 28, 2020
    Inventors: Takuya TERAMOTO, Takahide TADOKORO, Katsuyuki YAMAMOTO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
  • Publication number: 20200080795
    Abstract: A heat exchanger includes a plurality of plate-shaped fins disposed at intervals, and a plurality of heat transfer tubes disposed to be inserted into through holes of the fins in a direction perpendicular to the fins. In each of the fins, a starting hole is formed between adjacent through holes, and the starting hole serves as a start point of bending of the fins and has a vertex portion at a bending portion of each fin which is close to an edge thereof. In each of the fins, a cut is made to connect the other edge of the fin and a side of the starting hole which is located opposite to the vertex portion of the starting hole. The above each fin is bent at the vertex portion of the starting hole, by opening the cut from the starting hole.
    Type: Application
    Filed: November 28, 2016
    Publication date: March 12, 2020
    Inventors: Yuki UGAJIN, Yusuke ADACHI, Hiroaki MAKINO, Hiroshi OMURA
  • Patent number: 10563924
    Abstract: Plate-shaped fins of a heat exchanger each include, at circumferential portions thereof defining a notch in which a heat transfer tube having a flattened shape is disposed, fin collars formed by being raised from the circumferential portions. Each of the fin collars includes, in a position that faces a long axis side surface of the heat transfer tube, at least one reflare section bent in a direction opposite to the side surface. At least one of the reflare sections defining fin pitches between the adjoining plate-shaped fins is formed so that a reflare tip portion, which is a tip portion of the reflare section, is drawn apart from a contact side surface of the plate-shaped fin with which the reflare section comes into contact.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shin Nakamura, Akira Ishibashi, Shinya Higashiiue, Daisuke Ito, Shigeyoshi Matsui, Yuki Ugajin, Takashi Okazaki, Atsushi Mochizuki
  • Patent number: 10514216
    Abstract: A heat exchanger includes: a first heat transfer portion including a plurality of first flat tubes arranged at equal intervals and spaced apart from each other by a distance Dp in a gravity direction; and a second heat transfer portion positioned downstream of the first heat transfer portion in a flow direction of a heat exchange medium perpendicular to the gravity direction, the second heat transfer portion including a plurality of second flat tubes arranged at equal intervals and spaced apart from each other by the distance Dp in the gravity direction.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: December 24, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Maeda, Yuki Ugajin, Akira Ishibashi
  • Patent number: 10480869
    Abstract: A heat exchanger includes a first heat exchanging portion including first and second flat tubes stacked in parallel with each other and spaced from each other to allow fluid to pass between the first and second flat tubes, and a second heat exchanging portion including third and fourth flat tubes stacked in parallel with each other, spaced from each other to allow fluid to pass between the third and fourth flat tubes, and oriented crosswise to a direction in which the first and second flat tubes are oriented. The second heat exchanging portion is arranged downstream of the first heat exchanging portion with respect to flow of the fluid.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Ishibashi, Yuki Ugajin, Daisuke Ito, Shin Nakamura, Satoshi Ueyama, Aya Kawashima, Susumu Yoshimura, Takashi Matsumoto, Ryota Akaiwa, Yoji Onaka
  • Patent number: 10436514
    Abstract: Provided is a heat exchanger, including: a first heat exchange unit, which includes a first flat tube; a second heat exchange unit, which is arranged so as to be opposed to the first heat exchange unit, and includes a second flat tube; and a tank, which connects the first heat exchange unit and the second heat exchange unit to each other. The tank has an upper wall and a lower wall defining an upper end and lower end of a tank space formed in the tank, respectively. One end of the first flat tube and one end of the second flat tube are connected to the tank space. When a height from the lower wall to the upper wall is defined as X, and a height from the lower wall to the one end of the first flat tube is defined as Y1, a relation between X and Y1 satisfies Y1<(½)X.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: October 8, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinya Higashiiue, Akira Ishibashi, Daisuke Ito, Yuki Ugajin, Shin Nakamura, Ryota Akaiwa
  • Patent number: 10254024
    Abstract: A distributor includes a main body. The main body includes a refrigerant inflow path, a plurality of refrigerant outflow paths, a distribution path communicating with the refrigerant inflow path and the plurality of refrigerant outflow paths, and a plurality of tapered paths each communicating between corresponding one of the plurality of refrigerant outflow paths and the distribution path. The tapered paths each have an inlet opening and an outlet opening, the inlet opening being larger than the outlet opening.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: April 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinya Higashiiue, Shigeyoshi Matsui, Akira Ishibashi, Daisuke Ito, Yuki Ugajin, Takumi Nishiyama, Shin Nakamura
  • Publication number: 20190072335
    Abstract: In a heat exchanger, a first heat exchange unit is formed by curving a third heat exchange unit having a planar shape through L-shape bending, and a second heat exchange unit is formed by curving a fourth heat exchange unit having a planar shape through the L-shape bending, independently of the third heat exchange unit. The first heat exchange unit and the second heat exchange unit are arranged so as to be opposed to each other along a corner portion between adjacent two side surfaces of a casing.
    Type: Application
    Filed: November 2, 2018
    Publication date: March 7, 2019
    Inventors: Shin NAKAMURA, Hideaki MAEYAMA, Akira ISHIBASHI, Shinya HIGASHIIUE, Daisuke ITO, Shigeyoshi MATSUI, Yuki UGAJIN
  • Publication number: 20190049185
    Abstract: A heat exchanger includes a plurality of flat tubes provided to extend in a first direction, and a plurality of plate-shaped fins having respective surfaces extending in a second direction. The surface has a windward edge and a leeward edge. The plurality of flat tubes include a first flat tube disposed most windward in the second direction, and a second flat tube spaced apart from the first flat tube and disposed most leeward in the second direction. In the second direction, a distance between the leeward edge and a center of a flat shape of the second flat tube is at least one-third of a width between the windward edge and the leeward edge.
    Type: Application
    Filed: April 22, 2016
    Publication date: February 14, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Daisuke ITO, Shin NAKAMURA, Yuki UGAJIN, Tsuyoshi MAEDA
  • Publication number: 20180372429
    Abstract: A heat exchanger includes: a first heat transfer portion including a plurality of first flat tubes arranged at equal intervals and spaced apart from each other by a distance Dp in a gravity direction; and a second heat transfer portion positioned downstream of the first heat transfer portion in a flow direction of a heat exchange medium perpendicular to the gravity direction, the second heat transfer portion including a plurality of second flat tubes arranged at equal intervals and spaced apart from each other by the distance Dp in the gravity direction.
    Type: Application
    Filed: January 19, 2016
    Publication date: December 27, 2018
    Inventors: Tsuyoshi MAEDA, Yuki UGAJIN, Akira ISHIBASHI
  • Patent number: 10156400
    Abstract: In a heat exchanger, a first heat exchange unit is formed by curving a third heat exchange unit having a planar shape through L-shape bending, and a second heat exchange unit is formed by curving a fourth heat exchange unit having a planar shape through the L-shape bending, independently of the third heat exchange unit. The first heat exchange unit and the second heat exchange unit are arranged so as to be opposed to each other along a corner portion between adjacent two side surfaces of a casing.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: December 18, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shin Nakamura, Hideaki Maeyama, Akira Ishibashi, Shinya Higashiiue, Daisuke Ito, Shigeyoshi Matsui, Yuki Ugajin
  • Patent number: 10126026
    Abstract: A refrigeration cycle apparatus according to the present invention includes a refrigerant circuit formed by connecting, by pipes, a compressor configured to compress a refrigerant sucked into the compressor and discharge the refrigerant, a condenser configured to cause the refrigerant to reject heat and condense the refrigerant, an electronic expansion valve configured to reduce a pressure of the condensed refrigerant, and an evaporator configured to cause the refrigerant to remove heat and evaporate the refrigerant, in which the refrigerant is a refrigerant mixture including R32 and HFO-1123, and in the refrigerant mixture, R32 is greater than HFO-1123 in mass %.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: November 13, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuki Ugajin
  • Patent number: D870254
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: December 17, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Teramoto, Takashi Ikeda, Yusuke Adachi, Yuki Ugajin, Shingo Hamada, Hiroya Ito
  • Patent number: D870260
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: December 17, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Teramoto, Takashi Ikeda, Yusuke Adachi, Yuki Ugajin, Shingo Hamada, Hiroya Ito
  • Patent number: D870261
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: December 17, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Teramoto, Takashi Ikeda, Yusuke Adachi, Yuki Ugajin, Shingo Hamada, Hiroya Ito
  • Patent number: D870877
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: December 24, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Teramoto, Takashi Ikeda, Yusuke Adachi, Yuki Ugajin, Shingo Hamada, Hiroya Ito
  • Patent number: D871563
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: December 31, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Teramoto, Takashi Ikeda, Yusuke Adachi, Yuki Ugajin, Shingo Hamada, Hiroya Ito