Patents by Inventor Kiyoshi Taguchi

Kiyoshi Taguchi 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: 9865892
    Abstract: Provided are a fuel cell system capable of shortening the wait time of an observer who confirms set points of a system interconnection protective device before starting a system interconnection operation, and a method for operating the fuel cell system.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: January 9, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshikazu Tanaka, Kiyoshi Taguchi, Yoshio Tamura, Shigeki Yasuda, Hiroaki Kaneko
  • Patent number: 9791154
    Abstract: A power generation system includes: a combustor operative to combust a fuel; a power generator operative to utilize energy obtained from the combustor when generating electric power; a fuel supplier operative to supply the fuel to the combustor; an air supplier operative to supply combustion air to the combustor; a discharged gas passage through which a discharged gas from the combustor flows; a CO detector operative to detect CO in the discharged gas; a temperature detector operative to detect a temperature of the discharged gas; and control circuitry operative to, when the discharged gas is flowing through the discharged gas passage, perform at least one of an operation of detecting a structural abnormality of the discharged gas passage based on a difference between detected temperatures of the temperature detector relative to a difference between heated amounts of the discharged gas heated by a heater and an operation of detecting the structural abnormality of the discharged gas passage based on the differ
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: October 17, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Akinori Yukimasa, Hiroshi Tatsui, Kiyoshi Taguchi, Shigeru Iiyama
  • Patent number: 9685672
    Abstract: A hydrogen generation apparatus according to the present invention includes: a reformer configured to generate a hydrogen-containing gas through a reforming reaction; a combustor configured to heat the reformer; an air supply device configured to supply air to the combustor; a fuel supply device configured to supply a fuel to the combustor; a CO detector configured to detect a carbon monoxide concentration in a flue gas discharged from the combustor; and a controller configured to control at least one of the air supply device and the fuel supply device to increase an air ratio in the combustor such that the CO concentration in the flue gas increases, and then test the CO detector for abnormality.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: June 20, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shigeru Iiyama, Kiyoshi Taguchi, Tomonori Aso, Hiroshi Tatsui, Akinori Yukimasa
  • Patent number: 9685670
    Abstract: A method of operating a hydrogen generator includes: a step (a) of generating a hydrogen-containing gas by a hydrogen generation unit by using a raw material in the hydrogen generation unit; a step (b) of removing a sulfur compound from the raw material by a hydrodesulfurizer which is heated by heat transferred from the hydrogen generation unit; and a step (c) of performing an operation of supplying the raw material to the hydrogen generation unit after stopping the generating of the hydrogen-containing gas by the hydrogen generation unit. The step (c) is not performed unless, at least, a temperature of the hydrodesulfurizer is such a temperature at which carbon deposition from the raw material is suppressed.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: June 20, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Chie Harada, Hidenobu Wakita, Seiji Fujihara, Tomoyuki Nakajima, Takahiro Kusuyama, Kiyoshi Taguchi
  • Patent number: 9290385
    Abstract: A hydrogen generation apparatus (100) includes: a reformer (10) configured to generate a hydrogen-containing gas by using a raw material and steam; a raw material passage (21) through which the raw material that is supplied to the reformer (10) flows; a hydrodesulfurizer (13) provided downstream from a most downstream valve (11) on the raw material passage (21) and configured to remove a sulfur compound from the raw material; a sealer (15) provided on a passage (24) downstream from the reformer (10) and configured to block communication between the reformer (10) and the atmosphere; and a depressurizer (16) provided on the raw material passage (21) at a portion connecting the hydrodesulfurizer (13) and the reformer (10) and configured to release, to the atmosphere, pressure in the reformer (10) that has increased after the sealer (15) is closed.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: March 22, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kiyoshi Taguchi, Tomoya Takeuchi, Kunihiro Ukai
  • Patent number: 9278329
    Abstract: A hydrogen generator includes: a desulfurizer including a desulfurization catalyst that removes a sulfur compound in a raw material by a desulfurization reaction, the desulfurization catalyst being arranged so as to be heated by a first heat source; a reformer configured to generate a hydrogen-containing gas using the raw material having flowed through the desulfurizer; a first temperature detector configured to detect a temperature of a predetermined portion of the desulfurization catalyst; a second temperature detector configured to detect the temperature of a portion of the desulfurization catalyst, the portion being located such that a distance between the portion and the first heat source is longer than a distance between the predetermined portion and the first heat source; and a controller configured to control an operation of heating the desulfurization catalyst by the first heat source, based on detection results of the first temperature detector and the second temperature detector.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: March 8, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tomoya Takeuchi, Kiyoshi Taguchi, Yuji Mukai
  • Patent number: 9252436
    Abstract: A fuel cell system (301) of the present invention comprises a fuel cell (1); a water circulating path (9) through which water associated with an operation of the fuel cell (1) circulates; a water circulator (10) for circulating water in the water circulating path (9); a heater (14) for heating the water circulating path (9); a first abnormality detector (29, 30) for detecting a first abnormality which is an abnormality relating to leakage of water from the water circulating path (9); and a controller (16); the fuel cell system being configured to cause the water circulator (10) to perform a water circulating operation for circulating the water in the water circulating path (9) and cause the heater (14) to perform a heating operation for heating the water circulating path (9), to suppress freezing in the water circulating path, wherein the controller (16) is configured to inhibit the water circulating operation for suppressing freezing and not to inhibit the heating operation for suppressing freezing, in a cas
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: February 2, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shigeki Yasuda, Koichi Kusumura, Kiyoshi Taguchi, Yoshio Tamura
  • Publication number: 20150349364
    Abstract: A hydrogen generation apparatus according to the present invention includes: a reformer configured to generate a hydrogen-containing gas through a reforming reaction; a combustor configured to heat the reformer; an air supply device configured to supply air to the combustor; a fuel supply device configured to supply a fuel to the combustor; a CO detector configured to detect a carbon monoxide concentration in a flue gas discharged from the combustor; and a controller configured to control at least one of the air supply device and the fuel supply device to increase an air ratio in the combustor such that the CO concentration in the flue gas increases, and then test the CO detector for abnormality.
    Type: Application
    Filed: November 19, 2013
    Publication date: December 3, 2015
    Inventors: Shigeru IIYAMA, Kiyoshi TAGUCHI, Tomonori ASO, Hiroshi TATSUI, Akinori YUKIMASA
  • Publication number: 20150308689
    Abstract: A power generation system includes: a combustor operative to combust a fuel; a power generator operative to utilize energy obtained from the combustor when generating electric power; a fuel supplier operative to supply the fuel to the combustor; an air supplier operative to supply combustion air to the combustor; a discharged gas passage through which a discharged gas from the combustor flows; a CO detector operative to detect CO in the discharged gas; a temperature detector operative to detect a temperature of the discharged gas; and control circuitry operative to, when the discharged gas is flowing through the discharged gas passage, perform at least one of an operation of detecting an abnormality of the discharged gas passage based on a difference between detected temperatures of the temperature detector relative to a difference between heated amounts of the discharged gas heated by a heater and an operation of detecting the abnormality of the discharged gas passage based on the difference between the dete
    Type: Application
    Filed: May 30, 2014
    Publication date: October 29, 2015
    Inventors: Akinori YUKIMASA, Hiroshi TATSUI, Kiyoshi TAGUCHI, Shigeru IIYAMA
  • Patent number: 9083014
    Abstract: A fuel cell system of the present invention comprises a fuel cell (101); a first heat medium path through which a first heat medium for cooling the fuel cell (101) flows; a first flow control device (107) configured to flow the first heat medium in the first heat medium path; an abnormality detector configured to detect an abnormality; and a controller (110) configured to control the first flow control device (107) such that the fuel cell (101) after shut-down of power generation is cooled with a higher rate in an abnormal shut-down process performed after the abnormality detector detects the abnormality, than in a normal shut-down process.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: July 14, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshio Tamura, Yoshikazu Tanaka, Kiyoshi Taguchi, Shigeki Yasuda
  • Publication number: 20150165409
    Abstract: A hydrogen generator includes: a desulfurizer including a desulfurization catalyst that removes a sulfur compound in a raw material by a desulfurization reaction, the desulfurization catalyst being arranged so as to be heated by a first heat source; a reformer configured to generate a hydrogen-containing gas using the raw material having flowed through the desulfurizer; a first temperature detector configured to detect a temperature of a predetermined portion of the desulfurization catalyst; a second temperature detector configured to detect the temperature of a portion of the desulfurization catalyst, the portion being located such that a distance between the portion and the first heat source is longer than a distance between the predetermined portion and the first heat source; and a controller configured to control an operation of heating the desulfurization catalyst by the first heat source, based on detection results of the first temperature detector and the second temperature detector.
    Type: Application
    Filed: April 10, 2014
    Publication date: June 18, 2015
    Inventors: Tomoya Takeuchi, Kiyoshi Taguchi, Yuji Mukai
  • Patent number: 9005829
    Abstract: A hydrogen generation apparatus including: a first desulfurizer; a second desulfurizer; a reformer to generate a hydrogen-containing reformed gas from a raw material gas from which sulfur has been removed by at least one of the first desulfurizer and the second desulfurizer; and a recycle passage through which a part of the reformed gas generated by the reformer is mixed into the raw material gas to be supplied to the second desulfurizer. After installation or maintenance of the hydrogen generation apparatus, the raw material gas is supplied to the reformer through the first desulfurizer until a catalyst in the second desulfurizer is activated by a mixed gas of the reformed gas supplied through the recycle passage and the raw material gas, and after the catalyst in the second desulfurizer is activated, the raw material gas is supplied to the reformer through the second desulfurizer.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: April 14, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Akira Maenishi, Hidenobu Wakita, Seiji Fujihara, Masaki Nobuoka, Youji Kawaguchi, Kiyoshi Taguchi, Satoru Narita, Kunihiro Ukai
  • Patent number: 8980488
    Abstract: A fuel cell system includes a reforming unit, a carbon-monoxide decreasing unit, a fuel cell, a burner unit, and a raw gas supply device. At a start-up operation of the fuel cell system, an amount of raw gas supplied from the raw has supply device is adjusted according to an amount of a desorbed raw gas desorbed out of components of the raw gas adsorbed to at least one of the reforming catalyst and a carbon monoxide decreasing catalyst such that a ratio of an amount of the combustion air to an amount of the raw gas in the burner unit falls within a predetermined range.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroshi Tatsui, Kiyoshi Taguchi
  • Publication number: 20150044102
    Abstract: A hydrogen generation apparatus is configured to be supplied with a raw material containing a hydrocarbon component and generate a hydrogen-containing fuel gas. The hydrogen generation apparatus includes: a reformer configured to cause a reforming reaction of a mixed gas of the raw material and steam; a combustor configured to combust a combustible gas to heat the reformer; a hydrodesulfurizer configured to be supplied with heat from the reformer, and cause a reaction between sulfur in the raw material that is to be supplied to the reformer and hydrogen to remove the sulfur from the raw material; a first heat insulating material disposed between the hydrodesulfurizer and the reformer; and a heat equalizing plate disposed between the hydrodesulfurizer and the first heat insulating material.
    Type: Application
    Filed: April 4, 2013
    Publication date: February 12, 2015
    Applicant: PANASONIC CORPORATION
    Inventors: Yoichi Kimura, Masaru Fukuda, Hiroki Fujioka, Yuji Mukai, Yutaka Yoshida, Kiyoshi Taguchi
  • Patent number: 8916304
    Abstract: A hydrogen generator includes: a reformer (102) configured to generate a hydrogen-containing gas by a reforming reaction using a raw material; a combustor (104) configured to heat the reformer; an air supplying device (106) configured to supply combustion air to the combustor; a first heat exchanger (108) configured to recover heat from a flue gas discharged from the combustor; a first heat medium passage (110) through which a first heat medium flows, the first heat medium receiving the heat recovered from the flue gas in the first heat exchanger; a first pump (112) configured to cause the first heat medium in the first heat medium passage to flow; a heat accumulator (140) configured to store the heat recovered by the first heat medium; and a controller (114) configured to cause the first pump to operate in a cooling step that is a step of cooling down at least the reformer by supplying the air from the air supplying device to the combustor in a state where the combustor is not carrying out combustion during
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: December 23, 2014
    Assignee: Panasonic Corporation
    Inventors: Yoshio Tamura, Kiyoshi Taguchi, Yoshikazu Tanaka, Shigeki Yasuda
  • Publication number: 20140344638
    Abstract: A signal processing device including: a first memory, and a processing circuit coupled to the first memory and configured to perform decoding of a first received signal based on first likelihood data of the first received signal, transfer the first likelihood data to a second memory that is external to the signal processing device, only when the decoding is unsuccessful, and combine the first likelihood data loaded from the second memory with second likelihood data of a second received signal that corresponds to retransmitted signal of the first received signal.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Kiyoshi TAGUCHI, Hirotoshi SHIMIZU, Shunji MIYAZAKI, Noboru KOBAYASHI
  • Patent number: 8758950
    Abstract: A fuel cell system includes a reforming unit, a carbon monoxide decreasing unit, a fuel cell, a burner unit, a raw gas supply device, and a heating unit. The heating unit is controlled at a start-up operation of the fuel cell system, so as to adjust an amount of a desorbed raw gas desorbed out of components of the raw gas adsorbed to at least one of a reforming catalyst and a carbon monoxide decreasing catalyst such that a ratio of an amount of combustion air to an amount of a raw gas in the burner unit falls within a predetermined range.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: June 24, 2014
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Tatsui, Kiyoshi Taguchi
  • Patent number: 8747498
    Abstract: A hydrogen generator of the present invention includes a reformer (16) for generating a hydrogen-containing gas through a reforming reaction using a raw material; a combustor (102a) for heating the reformer (16); a combustion air supplier (117) for supplying combustion air to the combustor (102a); and an abnormality detector (110a) for detecting an abnormality; and a controller (110) configured to control the combustion air supplier (117) such that the reformer (16) is cooled with a higher rate in an abnormal shut-down process executed after the abnormality detector (110a) detects the abnormality, than in a normal shut-down process.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: June 10, 2014
    Assignee: Panasonic Corporation
    Inventors: Kiyoshi Taguchi, Takanori Shimada, Yoshikazu Tanaka, Yoshio Tamura, Shigeki Yasuda
  • Publication number: 20140127597
    Abstract: A method of operating a hydrogen generator includes: a step (a) of generating a hydrogen-containing gas by a hydrogen generation unit by using a raw material in the hydrogen generation unit; a step (b) of removing a sulfur compound from the raw material by a hydrodesulfurizer which is heated by heat transferred from the hydrogen generation unit; and a step (c) of performing an operation of supplying the raw material to the hydrogen generation unit after stopping the generating of the hydrogen-containing gas by the hydrogen generation unit. The step (c) is not performed unless, at least, a temperature of the hydrodesulfurizer is such a temperature at which carbon deposition from the raw material is suppressed.
    Type: Application
    Filed: March 1, 2013
    Publication date: May 8, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Chie Harada, Hidenobu Wakita, Seiji Fujihara, Tomoyuki Nakajima, Takahiro Kusuyama, Kiyoshi Taguchi
  • Publication number: 20140072892
    Abstract: A hydrogen generation apparatus including: a first desulfurizer; a second desulfurizer; a reformer to generate a hydrogen-containing reformed gas from a raw material gas from which sulfur has been removed by at least one of the first desulfurizer and the second desulfurizer; and a recycle passage through which a part of the reformed gas generated by the reformer is mixed into the raw material gas to be supplied to the second desulfurizer. After installation or maintenance of the hydrogen generation apparatus, the raw material gas is supplied to the reformer through the first desulfurizer until a catalyst in the second desulfurizer is activated by a mixed gas of the reformed gas supplied through the recycle passage and the raw material gas, and after the catalyst in the second desulfurizer is activated, the raw material gas is supplied to the reformer through the second desulfurizer.
    Type: Application
    Filed: June 7, 2012
    Publication date: March 13, 2014
    Inventors: Akira Maenishi, Hidenobu Wakita, Seiji Fujihara, Masaki Nobuoka, Youji Kawaguchi, Kiyoshi Taguchi, Satoru Narita, Kunihiro Ukai