Patents by Inventor Hiroyuki Osakabe

Hiroyuki Osakabe 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: 9689628
    Abstract: An inner fin is an offset fin having a wavy cross-section that is perpendicular to an oil flowing direction, and has a louver that is partially cut and bent in a direction parallel with the oil flowing direction. The wavy cross-section is defined by alternately placing first-side convex parts and second-side convex parts. A fin height fh is defined by a distance from the first-side convex part to the second-side convex part in the cross-section. An area surrounded by the inner fin, a tube, and the first-side or second-side convex parts located adjacent with each other on the same side in the cross-section is converted into a corresponding circle having a diameter de. When a relationship of X=de/fh0.3 is defined, the diameter of the corresponding circle and the fin height respectively have dimensions that satisfy a relationship of 0.5?X?1.0.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: June 27, 2017
    Assignee: DENSO CORPORATION
    Inventors: Takahiro Uno, Hiroyuki Osakabe, Daisuke Takahashi
  • Publication number: 20120031593
    Abstract: An inner fin is an offset fin having a wavy cross-section that is perpendicular to an oil flowing direction, and has a louver that is partially cut and bent in a direction parallel with the oil flowing direction. The wavy cross-section is defined by alternately placing first-side convex parts and second-side convex parts. A fin height fh is defined by a distance from the first-side convex part to the second-side convex part in the cross-section. An area surrounded by the inner fin, a tube, and the first-side or second-side convex parts located adjacent with each other on the same side in the cross-section is converted into a corresponding circle having a diameter de. When a relationship of X=de/fh0.3 is defined, the diameter of the corresponding circle and the fin height respectively have dimensions that satisfy a relationship of 0.5?X?1.0.
    Type: Application
    Filed: July 6, 2011
    Publication date: February 9, 2012
    Applicant: DENSO CORPORATION
    Inventors: Takahiro Uno, Hiroyuki Osakabe, Daisuke Takahashi
  • Patent number: 8074708
    Abstract: A heat exchanger includes tubes and a tank. The tubes extend in a first direction, and are stacked in a second direction. The tank has a tube insertion plate part, and is arranged at an end portion of the tubes. The tube insertion plate part has tube holes in which the tubes are inserted, and ribs extending in a third direction that is approximately perpendicular to the first direction and the second direction. The tube hole has end portions in the third direction. The rib are arranged to overlap with the end portion of the tube hole in the second direction, and to provide a deformable part to be deformable in the first direction. The deformable part is located in the tube insertion plate part outside of the ribs in the third direction.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: December 13, 2011
    Assignee: Denso Corporation
    Inventors: Hajime Sugito, Hiroyuki Osakabe, Hirokazu Hirose, Takahiro Uno
  • Publication number: 20110000642
    Abstract: A heat exchanger comprising: a core portion including a plurality of tubes; a pair of header tanks communicating with the tubes; and a pair of inserts arranged substantially parallel to the length of the tubes, and in such a manner as to contact the core portion at the ends of the core portion to transfer the heat from the core portion, and having the ends thereof supported on the header tanks; wherein a stress absorber to absorb the stress generated along the length of each insert is formed in the insert; wherein the stress absorber is formed over each insert from the upstream side to the downstream side in the air flow; and wherein the stress absorber is arranged in such a manner that the most upstream end and the most downstream end thereof in the air flow are not superposed, one on the other, along the direction of air flow.
    Type: Application
    Filed: September 7, 2010
    Publication date: January 6, 2011
    Applicant: DENSO CORPORATION
    Inventors: Hirokazu Hirose, Hiroyuki Osakabe, Hajime Sugito, Michiyasu Yamamoto, Takahiro Uno
  • Publication number: 20080047689
    Abstract: A heat exchanger comprising: a core portion including a plurality of tubes; a pair of header tanks communicating with the tubes; and a pair of inserts arranged substantially parallel to the length of the tubes, and in such a manner as to contact the core portion at the ends of the core portion to transfer the heat from the core portion, and having the ends thereof supported on the header tanks; wherein a stress absorber to absorb the stress generated along the length of each insert is formed in the insert; wherein the stress absorber is formed over each insert from the upstream side to the downstream side in the air flow; and wherein the stress absorber is arranged in such a manner that the most upstream end and the most downstream end thereof in the air flow are not superposed, one on the other, along the direction of air flow.
    Type: Application
    Filed: October 16, 2007
    Publication date: February 28, 2008
    Applicant: DENSO Corporation
    Inventors: Hirokazu Hirose, Yoshihiko Kamiya, Toshihide Ninagawa, Hiroyuki Osakabe, Hajime Sugito, Michiyasu Yamamoto, Takahiro Uno
  • Publication number: 20080000626
    Abstract: A heat exchanger includes tubes and a tank. The tubes extend in a first direction, and are stacked in a second direction. The tank has a tube insertion plate part, and is arranged at an end portion of the tubes. The tube insertion plate part has tube holes in which the tubes are inserted, and ribs extending in a third direction that is approximately perpendicular to the first direction and the second direction. The tube hole has end portions in the third direction. The rib are arranged to overlap with the end portion of the tube hole in the second direction, and to provide a deformable part to be deformable in the first direction. The deformable part is located in the tube insertion plate part outside of the ribs in the third direction.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 3, 2008
    Applicant: DENSO Corporation
    Inventors: Hajime Sugito, Hiroyuki Osakabe, Hirokazu Hirose, Takahiro Uno
  • Patent number: 7267163
    Abstract: A heat exchanger comprises: flat tubes laminated on each other, an external fluid flowing in a space formed between the flat tubes arranged adjacent to each other; and fins interposed between the flat tubes, the fins being formed into a protruding and recessing shape having a flat plate portion joined to an outer wall face of the tube when viewed in the flow direction of the external fluid and having a vertical plate portion crossing the flat plate portion, wherein heat is exchanged between the external fluid and the internal fluid flowing in the tubes, the flat plate portion including protruding portions arranged so the protruding portions is inclined in the flow direction of the external fluid, protrusions of the protruding portions being increased toward the downstream side of the external fluid, the vertical plate portion being formed so it meanders in the flow direction of the external fluid.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: September 11, 2007
    Assignee: DENSO Corporation
    Inventors: Hiroyuki Osakabe, Takaki Okochi, Toshihide Ninagawa
  • Patent number: 7207377
    Abstract: A heat exchanger having a plurality of stacked tubes (131) and tanks (110, 120) formed of resin and coupled to the longitudinal ends of the tubes (131), wherein the cooling liquid flowing in a fuel-cell (10) is cooled by being passed through the tubes (131) formed of double layers including a high heat conductivity resin portion (131a) and an insulative resin portion (131b).
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: April 24, 2007
    Assignee: DENSO Corporation
    Inventors: Yoshihiko Sonoda, Hiroyuki Osakabe, Masahiro Omae
  • Publication number: 20070012424
    Abstract: A heat exchanger comprises a core portion including a plurality of tubes with a heat medium flowing therein and fins coupled to the outer surface of the tubes for promoting heat exchange with the heat medium, a pair of header tanks extending in a direction perpendicular to the length or the tubes at the longitudinal ends of the tubes and communicating with the tubes, and a pair of inserts arranged substantially parallel to the length of the tubes at the ends of the core portion to receive the heat transmitted from the core portion and having the ends thereof supported on the header tanks, each header tank includes a core plate with the tubes fixed thereon and a tank body providing the internal space of the tank with the core plate, and the ends of each insert are arranged outside the internal space of the tank and the insert is movably fitted in the header tank and along the length thereof and is immovable in a direction perpendicular to the length thereof.
    Type: Application
    Filed: July 11, 2006
    Publication date: January 18, 2007
    Applicant: DENSO Corporation
    Inventors: Yoshihiko Kamiya, Toshihide Ninagawa, Hirokazu Hirose, Hiroyuki Osakabe, Hajime Sugito
  • Publication number: 20060201666
    Abstract: A heat exchanger having a plurality of stacked tubes (131) and tanks (110, 120) formed of resin and coupled to the longitudinal ends of the tubes (131), wherein the cooling liquid flowing in a fuel-cell (10) is cooled by being passed through the tubes (131) formed of double layers including a high heat conductivity resin portion (131a) and an insulative resin portion (131b).
    Type: Application
    Filed: March 7, 2006
    Publication date: September 14, 2006
    Applicant: DENSO Corporation
    Inventors: Yoshihiko Sonoda, Hiroyuki Osakabe, Masahiro Omae
  • Patent number: 7004239
    Abstract: A cooling apparatus includes a refrigerant tank having a surface to which heating devices are attached and containing liquid refrigerant which is boiled and evaporated by heat transferred from the heating devices, and a radiator for radiating the heat of the boiled and vaporized refrigerant. The radiator has an inflow return chamber provided with a small-diameter opening having a diameter smaller than that of the inflow return chamber. The liquid refrigerant of the gas-liquid mixed refrigerant is dammed by the small-diameter opening of the inflow return chamber and the dammed liquid refrigerant is returned through a return passage to the refrigerant tank. Since the liquid refrigerant contained in the gas-liquid mixed refrigerant is suppressed from flowing by means of the small-diameter opening, the gaseous refrigerant can transfer heat directly to the walls of the radiating passages, so that the deterioration of the radiating performance can be prevented.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: February 28, 2006
    Assignee: DENSO Corporation
    Inventors: Hiroyuki Osakabe, Kiyoshi Kawaguchi, Masahiko Suzuki
  • Publication number: 20050263270
    Abstract: A heat exchanger comprises: flat tubes laminated on each other, an external fluid flowing in a space formed between the flat tubes arranged adjacent to each other; and fins interposed between the flat tubes, the fins being formed into a protruding and recessing shape having a flat plate portion joined to an outer wall face of the tube when viewed in the flow direction of the external fluid and having a vertical plate portion crossing the flat plate portion, wherein heat is exchanged between the external fluid and the internal fluid flowing in the tubes, the flat plate portion including protruding portions arranged so the protruding portions is inclined in the flow direction of the external fluid, protrusions of the protruding portions being increased toward the downstream side of the external fluid, the vertical plate portion being formed so it meanders in the flow direction of the external fluid.
    Type: Application
    Filed: May 23, 2005
    Publication date: December 1, 2005
    Applicant: DENSO Corporation
    Inventors: Hiroyuki Osakabe, Takaki Okochi, Toshihide Ninagawa
  • Publication number: 20050051302
    Abstract: A cooling apparatus 1 boiling and condensing refrigerant is constructed to have a stacked construction by stacking a plurality of pressed members 3 and comprises a refrigerant tank portion, a heat exchanging portion and a refrigerant diffusing portion. First openings for passing refrigerant and second openings for passing cooling water are formed in the pressed members 3 used for the heat exchanging portion and the first openings communicate with internal spaces formed in the refrigerant tank portion and the refrigerant diffusing portion. According to the construction, as the cooling apparatus has the stacked construction, tubes and fins that constitute a conventional heat dissipating portion can be eliminated.
    Type: Application
    Filed: December 16, 2003
    Publication date: March 10, 2005
    Inventors: Hajime Sugito, Hiroyuki Osakabe, Takaki Okochi
  • Patent number: 6857466
    Abstract: This cooling apparatus can improve a radiation performance by increasing the boiling area and make it difficult to cause the burnout on boiling faces by filling the boiling faces with a refrigerant necessary for the boiling. In refrigerant chambers for reserving a refrigerant, there are inserted corrugated fins for increasing the boiling area. These corrugated fins are composed of lower corrugated fins arranged to correspond to the lower sides of the boiling faces for receiving the heat of a heating body, and upper corrugated fins arranged to correspond to the upper sides of the boiling faces, and these lower and upper corrugated fins and are individually held in thermal contact with the boiling faces of the refrigerant chambers. The lower corrugated fins and the upper corrugated fins are given a common fin pitch P and are individually inserted vertically in the individual refrigerant chambers to define the individual passages further into a plurality of small passage portions.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: February 22, 2005
    Assignee: Denso Corporation
    Inventor: Hiroyuki Osakabe
  • Patent number: 6808015
    Abstract: A boiling cooler has a heat exchange part in which refrigerant vapor performs heat exchange with cooling water. The refrigerant vapor is produced from liquid refrigerant that is boiled and gasified by heat transferred from a heating element. In this boiling cooler, the refrigerant vapor can be cooled by cooling water having a thermal conductivity larger than that of air.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: October 26, 2004
    Assignee: DENSO Corporation
    Inventor: Hiroyuki Osakabe
  • Patent number: 6742574
    Abstract: A cooling apparatus 1 boiling and condensing refrigerant is constructed to have a stacked construction by stacking a plurality of pressed members 3 and comprises a refrigerant tank portion, a heat exchanging portion and a refrigerant diffusing portion. First openings for passing refrigerant and second openings for passing cooling water are formed in the pressed members 3 used for the heat exchanging portion and the first openings communicate with internal spaces formed in the refrigerant tank portion and the refrigerant diffusing portion. According to the construction, as the cooling apparatus has the stacked construction, tubes and fins that constitute a conventional heat dissipating portion can be eliminated.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: June 1, 2004
    Assignee: Denso Corporation
    Inventors: Hajime Sugito, Hiroyuki Osakabe, Shinichi Morihira, Takaki Okochi, Yuhei Kunikata
  • Patent number: 6719040
    Abstract: A first intermediate plate 5C adjacent to a heat receiving plate 5A and a second intermediate plate 5D adjacent to the first intermediate plate 5C are provided so that the slit width of the openings (first opening 5a) in the first intermediate plate 5C is wider than that (second opening 5b) in the second intermediate plate 5D. In this way, when the first intermediate plate 5C and the second intermediate 5D are stacked, a tunnel structure is formed in which the opening dimension L3 (the opening dimension of the second openings 5b) of the communicating sections through which the first openings 5a and the second openings 5b communicate with each other is smaller than the length L2 (the opening dimension of the first openings 5a) of the tunnel portions (L2>L3). Therefore, a heat-generating member with large density of heat generation can be effectively cooled.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 13, 2004
    Assignee: Denso Corporation
    Inventors: Hajime Sugito, Hiroyuki Osakabe, Shinichi Morihira, Yuhei Kunikata
  • Patent number: 6561262
    Abstract: A boiling and cooling apparatus is provided which has a refrigerant tank for maintaining a liquid refrigerant for boiling when it receives heat from a heating body, a radiator which receives refrigerant vapor boiled in the refrigerant tank. The radiator cools refrigerant vapor to form the liquid refrigerant by exchanging heat with an external fluid. The radiator includes a first passage for receiving the refrigerant vapor and a second passage for returning condensed liquid to the refrigerant tank. The radiator has an upper space which provides communication between the first passage and the second passage, whereby the refrigerant vapor is guided to flow preferentially into the first passage.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: May 13, 2003
    Assignee: Denso Corporation
    Inventors: Hiroyuki Osakabe, Hajime Sugito
  • Publication number: 20030079863
    Abstract: A first intermediate plate 5C adjacent to a heat receiving plate 5A and a second intermediate plate 5D adjacent to the first intermediate plate 5C are provided so that the slit width of the openings (first opening 5a) in the first intermediate plate 5C is wider than that (second opening 5b) in the second intermediate plate 5D. In this way, when the first intermediate plate 5C and the second intermediate 5D are stacked, a tunnel structure is formed in which the opening dimension L3 (the opening dimension of the second openings 5b) of the communicating sections through which the first openings 5a and the second openings 5b communicate with each other is smaller than the length L2 (the opening dimension of the first openings 5a) of the tunnel portions (L2>L3). Therefore, a heat-generating member with large density of heat generation can be effectively cooled.
    Type: Application
    Filed: December 22, 2002
    Publication date: May 1, 2003
    Inventors: Hajime Sugito, Hiroyuki Osakabe, Shinichi Morihira, Yuhei Kunikata
  • Patent number: 6527045
    Abstract: A cooling apparatus includes a refrigerant tank having a surface to which heating devices are attached and containing liquid refrigerant which is boiled and evaporated by heat transferred from the heating devices, and a radiator for radiating the heat of the boiled and vaporized refrigerant. The radiator has an inflow return chamber provided with a small-diameter opening having a diameter smaller than that of the inflow return chamber. The liquid refrigerant of the gas-liquid mixed refrigerant is dammed by the small-diameter opening of the inflow return chamber and the dammed liquid refrigerant is returned through a return passage to the refrigerant tank. Since the liquid refrigerant contained in the gas-liquid mixed refrigerant is suppressed from flowing by means of the small-diameter opening, the gaseous refrigerant can transfer heat directly to the walls of the radiating passages, so that the deterioration of the radiating performance can be prevented.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: March 4, 2003
    Assignee: Denso Corporation
    Inventors: Hiroyuki Osakabe, Kiyoshi Kawaguchi, Masahiko Suzuki