Patents by Inventor Takahide Ohara

Takahide Ohara 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: 6966362
    Abstract: In a cooling device, a condensation unit is constructed by stacking plural unit plates and two outer plates. The plural unit plates are superimposed in a plate-thickness direction between the outer plates, and three sheets of unit plates are also arranged in the planar direction. The radiating fins are provided such that the width of the base is substantially equal to the width of the unit plate, and are arranged in parallel on one of the outer plates in the same manner as the unit plate. According to this structure, the number of the unit plates arranged in parallel with the outer plates and the number of the radiating fins are increased or decreased, so that it is possible to easily change the size of a radiating unit in accordance with a necessary cooling capacity.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: November 22, 2005
    Assignee: Denso Corporation
    Inventors: Hiroshi Tanaka, Takahide Ohara, Kazutaka Suzuki, Yuhei Kunikata, Hiroo Yamaguchi
  • Patent number: 6874567
    Abstract: Tubes 3 are provided substantially upright on an upper surface of a refrigerant container 2 by inserting lower end portions thereof into inserting holes 5 of the refrigerant container 2. The tube 3A, differed from the tubes 3B, has a trumpet shape which is suddenly increased in its passage cross section towards the lower end opening portion. Thus, most of refrigerant vapor boiled and evaporated in the refrigerant container 2 can be collectively introduced into the tube 3A located within the boiling area. The refrigerant vapor entered a header tank 4 from the tube 3A is diffused in the header tank 4, and is introduced into the tubes 3B located out of the boiling area. The condensate produced by cooling the refrigerant vapor upon passing through the tubes 3B can be circulated into the refrigerant container 2.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: April 5, 2005
    Assignee: Denso Corporation
    Inventor: Takahide Ohara
  • Publication number: 20050056406
    Abstract: In a cooling device, a condensation unit is constructed by stacking plural unit plates and two outer plates. The plural unit plates are superimposed in a plate-thickness direction between the outer plates, and three sheets of unit plates are also arranged in the planar direction. The radiating fins are provided such that the width of the base is substantially equal to the width of the unit plate, and are arranged in parallel on one of the outer plates in the same manner as the unit plate. According to this structure, the number of the unit plates arranged in parallel with the outer plates and the number of the radiating fins are increased or decreased, so that it is possible to easily change the size of a radiating unit in accordance with a necessary cooling capacity.
    Type: Application
    Filed: September 29, 2004
    Publication date: March 17, 2005
    Inventors: Hiroshi Tanaka, Takahide Ohara, Kazutaka Suzuki, Yuhei Kunikata, Hiroo Yamaguchi
  • Patent number: 6863119
    Abstract: In a cooling device boiling and condensing refrigerant, a heat conductor portion for thermally connecting a heat reception wall and a heat radiation wall defining a closed container is disposed in the closed container, a heat-generating member is attached on the heat reception wall, and a heat radiation fin for radiating heat generated from the heat-generating member to an outside is provided on the heat radiation wall. In the cooling device, both ends of the tube are connected to the closed container at different position of the heat radiation wall to communicate with the closed container, so that the heat radiation fin is enclosed by the heat radiation wall and the tube.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: March 8, 2005
    Assignee: DENSO Corporation
    Inventors: Hajime Sugito, Hiroshi Tanaka, Takahide Ohara
  • Patent number: 6810947
    Abstract: In a cooling device, a condensation unit is constructed by stacking plural unit plates and two outer plates. The plural unit plates are superimposed in a plate-thickness direction between the outer plates, and three sheets of unit plates are also arranged in the planar direction. The radiating fins are provided such that the width of the base is substantially equal to the width of the unit plate, and are arranged in parallel on one of the outer plates in the same manner as the unit plate. According to this structure, the number of the unit plates arranged in parallel with the outer plates and the number of the radiating fins are increased or decreased, so that it is possible to easily change the size of a radiating unit in accordance with a necessary cooling capacity.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: November 2, 2004
    Assignee: Denso Corporation
    Inventors: Hiroshi Tanaka, Takahide Ohara, Kazutaka Suzuki, Yuhei Kunikata, Hiroo Yamaguchi
  • Publication number: 20040154785
    Abstract: Tubes 3 are provided substantially upright on an upper surface of a refrigerant container 2 by inserting lower end portions thereof into inserting holes 5 of the refrigerant container 2. The tube 3A, differed from the tubes 3B, has a trumpet shape which is suddenly increased in its passage cross section towards the lower end opening portion. Thus, most of refrigerant vapor boiled and evaporated in the refrigerant container 2 can be collectively introduced into the tube 3A located within the boiling area. The refrigerant vapor entered a header tank 4from the tube 3A is diffused in the header tank 4, and is introduced into the tubes 3B located out of the boiling area. The condensate produced by cooling the refrigerant vapor upon passing through the tubes 3B can be circulated into the refrigerant container 2.
    Type: Application
    Filed: February 6, 2004
    Publication date: August 12, 2004
    Inventor: Takahide Ohara
  • Patent number: 6705390
    Abstract: Tubes 3 are provided substantially upright on an upper surface of a refrigerant container 2 by inserting lower end portions thereof into inserting holes 5 of the refrigerant container 2. The tube 3A, differed from the tubes 3B, has a trumpet shape which is suddenly increased in its passage cross section towards the lower end opening portion. Thus, most of refrigerant vapor boiled and evaporated in the refrigerant container 2 can be collectively introduced into the tube 3A located within the boiling area. The refrigerant vapor entered a header tank 4 from the tube 3A is diffused in the header tank 4, and is introduced into the tubes 3B located out of the boiling area. The condensate produced by cooling the refrigerant vapor upon passing through the tubes 3B can be circulated into the refrigerant container 2.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: March 16, 2004
    Assignee: Denso Corporation
    Inventor: Takahide Ohara
  • Patent number: 6575230
    Abstract: According to the present invention, a cooling apparatus using boiling and condensing refrigerant, includes a fluid separating plate for separating a high-temperature fluid from a low-temperature fluid, a refrigerant tank disposed on the side of the high-temperature fluid from the fluid separating plate, a refrigerant sealed into the refrigerant tank, a pair of communication pipes, one end of which is communicated with the refrigerant tank hermetically, a condensing portion communicated with the other end of the communication pipes and disposed on the side of the low-temperature fluid from the fluid separating plate, and a heat insulating material as a high-temperature portion-side heat insulating material coated on the outer periphery of the high-temperature-side communication pipe. In this way, it is possible to suppress a heat conduction from a high-temperature portion (high-temperature air) to the high-temperature-side communication pipe.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: June 10, 2003
    Assignee: Denso Corporation
    Inventors: Shigeru Kadota, Kiyoshi Kawaguchi, Tetsuya Takeuti, Kazuo Kobayashi, Takahide Ohara, Masahiko Suzuki, Hajime Sugito, Junichi Semura
  • Publication number: 20030079864
    Abstract: Tubes 3 are provided substantially upright on an upper surface of a refrigerant container 2 by inserting lower end portions thereof into inserting holes 5 of the refrigerant container 2. The tube 3A, differed from the tubes 3B, has a trumpet shape which is suddenly increased in its passage cross section towards the lower end opening portion. Thus, most of refrigerant vapor boiled and evaporated in the refrigerant container 2 can be collectively introduced into the tube 3A located within the boiling area. The refrigerant vapor entered a header tank 4 from the tube 3A is diffused in the header tank 4, and is introduced into the tubes 3B located out of the boiling area. The condensate produced by cooling the refrigerant vapor upon passing through the tubes 3B can be circulated into the refrigerant container 2.
    Type: Application
    Filed: October 24, 2002
    Publication date: May 1, 2003
    Inventor: Takahide Ohara
  • Publication number: 20030070792
    Abstract: In a cooling device, a condensation unit is constructed by stacking plural unit plates and two outer plates. The plural unit plates are superimposed in a plate-thickness direction between the outer plates, and three sheets of unit plates are also arranged in the planar direction. The radiating fins are provided such that the width of the base is substantially equal to the width of the unit plate, and are arranged in parallel on one of the outer plates in the same manner as the unit plate. According to this structure, the number of the unit plates arranged in parallel with the outer plates and the number of the radiating fins are increased or decreased, so that it is possible to easily change the size of a radiating unit in accordance with a necessary cooling capacity.
    Type: Application
    Filed: January 15, 2002
    Publication date: April 17, 2003
    Inventors: Hiroshi Tanaka, Takahide Ohara, Kazutaka Suzuki, Yuhei Kunikata, Hiroo Yamaguchi
  • Patent number: 6360814
    Abstract: A cooling device for cooling a heat-generating member includes a refrigerant tank for boiling liquid refrigerant by heat from the heat-generating member and a radiator for cooling and condensing gas refrigerant from the refrigerant tank. The refrigerant tank has therein a plurality of refrigerant passages defined by ribs which are integrally formed with any one of opposite wall parts of the refrigerant tank. The ribs continuously extend in an up-down direction to be slightly longer than an up-down dimension of a boiling surface of the refrigerant tank. In the cooling device, because each passage width of the refrigerant passages is set to be equal to or smaller than double Laplace length, an outer diameter of bubbles in the refrigerant passages becomes larger, and liquid refrigerant can be moved upwardly by bubbles. Accordingly, it can restrict liquid refrigerant surface from being lowered even when gas-generating amount is increased.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: March 26, 2002
    Assignee: Denso Corporation
    Inventors: Hiroshi Tanaka, Tadayoshi Terao, Eitaro Tanaka, Takahide Ohara, Kiyoshi Kawaguchi
  • Publication number: 20020029873
    Abstract: In a cooling device boiling and condensing refrigerant, a heat conductor portion for thermally connecting a heat reception wall and a heat radiation wall defining a closed container is disposed in the closed container, a heat-generating member is attached on the heat reception wall, and a heat radiation fin for radiating heat generated from the heat-generating member to an outside is provided on the heat radiation wall. In the cooling device, both ends of the tube are connected to the closed container at different position of the heat radiation wall to communicate with the closed container, so that the heat radiation fin is enclosed by the heat radiation wall and the tube.
    Type: Application
    Filed: September 14, 2001
    Publication date: March 14, 2002
    Inventors: Hajime Sugito, Hiroshi Tanaka, Takahide Ohara
  • Patent number: 6341646
    Abstract: A cooling device boiling and condensing refrigerant includes a refrigerant tank having a boiling space in which a part of liquid refrigerant is boiled and vaporized to gas refrigerant by absorbing heat from a heat-generating member, first and second radiators disposed at upper and lower parts of the refrigerant tank, defined by a liquid refrigerant surface within the refrigerant tank, and a connection pipe connecting the first and second radiators. The first and second radiators have the same shape, and are disposed to cool and condense gas refrigerant from the boiling space. In the cooling device, even when the cooling device is used in a normal state or a vertically reversed state, sufficient radiating performance of the first and second radiators can be obtained.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: January 29, 2002
    Assignee: Denso Corporation
    Inventors: Hiroshi Tanaka, Tadayoshi Terao, Kiyoshi Kawaguchi, Takahide Ohara, Akihiro Maeda
  • Patent number: 6341645
    Abstract: A cooling device boiling and condensing refrigerant includes a refrigerant tank having a boiling space in which a part of liquid refrigerant is boiled and vaporized to gas refrigerant by absorbing heat from a heat-generating member, and a radiator having a header through which gas refrigerant from the boiling space flows into plural tubes connected to the header. One end of the header is inserted into the refrigerant tank, and the inserted end portion of the header has a communication port communicating with the boiling space through a gas refrigerant outlet. The communication port has a lower end at the same position as a lower end of the gas refrigerant outlet. Further, the tubes are inserted into the header to have opened ends within the header, and each lower end of the opened ends of the tubes is set at a position higher than the lower end of the communication port and the lower end of the gas refrigerant outlet.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: January 29, 2002
    Assignee: Denso Corporation
    Inventors: Hiroshi Tanaka, Tadayoshi Terao, Kiyoshi Kawaguchi, Takahide Ohara, Akihiro Maeda
  • Patent number: 6321831
    Abstract: A cooling apparatus includes a refrigerant tank containing boiling and condensing refrigerant and a radiator for cooling the refrigerant. The radiator is connected to the refrigerant tank on a front surface thereof, and hot objects to be cooled are attached to a heat-receiving surface formed on a rear surface of the refrigerant tank. The refrigerant is circulated in the apparatus so that the refrigerant is vaporized in the refrigerant tank and condensed in the radiator. The radiator is connected to the refrigerant tank by inserting a pair of header tanks thereof into the refrigerant tank. The insertion length is controlled to obtain good heat conductivity between the radiator and the refrigerant tank and to avoid deformation of a radiator fin contacting the refrigerant tank. Holes for mounting a substrate carrying the hot objects may be made on enlarged portions of a cover plate closing the refrigerant tank.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: November 27, 2001
    Assignee: Denso Corporation
    Inventors: Hiroshi Tanaka, Tadayoshi Terao, Kiyoshi Kawaguchi, Takahide Ohara, Akihiro Maeda, Eitaro Tanaka
  • Publication number: 20010009188
    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: Application
    Filed: February 8, 2001
    Publication date: July 26, 2001
    Inventors: Hiroyuki Osakabe, Kunihiro Kamiya, Takahide Ohara
  • Patent number: 6257324
    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: June 14, 1999
    Date of Patent: July 10, 2001
    Assignee: Denso Corporation
    Inventors: Hiroyuki Osakabe, Kunihiro Kamiya, Takahide Ohara
  • Patent number: 6119767
    Abstract: According to the present invention, a cooling apparatus using boiling and condensing refrigerant, includes a fluid separating plate for separating a high-temperature fluid from a low-temperature fluid, a refrigerant tank disposed on the side of the high-temperature fluid from the fluid separating plate, a refrigerant sealed into the refrigerant tank, a pair of communication pipes, one end of which is communicated with the refrigerant tank hermetically, a condensing portion communicated with the other end of the communication pipes and disposed on the side of the low-temperature fluid from the fluid separating plate, and a heat insulating material as a high-temperature portion-side heat insulating material coated on the outer periphery of the high-temperature-side communication pipe. In this way, it is possible to suppress a heat conduction from a high-temperature portion (high-temperature air) to the high-temperature-side communication pipe.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: September 19, 2000
    Assignee: Denso Corporation
    Inventors: Shigeru Kadota, Kiyoshi Kawaguchi, Tetsuya Takeuti, Kazuo Kobayashi, Takahide Ohara, Masahiko Suzuki, Hajime Sugito, Junichi Semura
  • Patent number: 6102109
    Abstract: A cooling device includes a refrigerant tank in which liquid refrigerant is boiled, and a radiator in which gas refrigerant is condensed. A connection pipe is formed in the radiator so that refrigerant communicates between the refrigerant tank and the radiator. An interior of the connection pipe is partitioned into a first communication passage and a second communication passage, and a restriction plate is provided between the first communication passage and a refrigerant-condensing passage of the radiator to prevent liquid refrigerant from flowing into the refrigerant-condensing passage. Thus, when heat-generating amount of a heat-generating member becomes larger so that liquid refrigerant is vehemently boiled in the refrigerant tank and a part of liquid refrigerant is blown upwardly together with refrigerant vapor, the restriction plate prevents the liquid refrigerant from flowing into the refrigerant-condensing passage of the radiator while gas refrigerant readily passes through the restriction plate.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: August 15, 2000
    Assignee: Denso Corporation
    Inventors: Hiroyuki Osakabe, Takahide Ohara
  • Patent number: 6073683
    Abstract: A cooling apparatus using boiling and condensing refrigerant for cooling a heat generating unit, includes a refrigerant tank having a wall surface, for containing the refrigerant therein, a heat generating unit boiling the refrigerant in the refrigerant tank by heating, and a radiator disposed in communication with the refrigerant tank for condensing and liquefying the boiling refrigerant in the tank. An interior of the refrigerant tank is partitioned into a vapor passage for leading the boiling refrigerant to the radiator, a condensed liquid passage in which the condensed and liquefied refrigerant flows downwardly, and a communication path formed at a lower side thereof for communicating between the vapor passage and the condensed liquid passage. The condensed liquid passage is defined by a part of the wall surface.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: June 13, 2000
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroyuki Osakabe, Kiyoshi Kawaguchi, Takahide Ohara, Shigeru Kadota, Masahiko Suzuki