Patents by Inventor Keigo Miyai
Keigo Miyai 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).
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Patent number: 7651800Abstract: The object is to provide a simplified but highly efficient fuel cell system, permitting to perform the flame off detection and so on without supplying the burner with additional raw fuel, even if a flame rod system flame detection means is adopted as burner for reformer. The invention concerns a fuel cell system, comprising a reformer for reforming a hydrocarbon base fuel such as natural gas into hydrogen, a CO transformer, a CO eliminator, a fuel cell for generating electricity from hydrogen, and a burner for reformer for burning hydrogen gas discharged from the fuel cell and supply the reformer with heat necessary for reforming reaction, wherein the burner for reformer is provided with a flame rod system flame detection means and, at the same time, supplied with hydrogen gas containing a flame detectable amount of fuel gas.Type: GrantFiled: March 11, 2008Date of Patent: January 26, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Masataka Kadowaki, Akira Fuju, Yasuo Miyake, Masatoshi Ueda, Keigo Miyai, Yukinori Akiyama
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Patent number: 7419733Abstract: The object is to provide a simplified but highly efficient fuel cell system, permitting to perform the flame off detection and so on without supplying the burner with additional raw fuel, even if a flame rod system flame detection means is adopted as burner for reformer. The invention concerns a fuel cell system, comprising a reformer for reforming a hydrocarbon base fuel such as natural gas into hydrogen, a CO transformer, a CO eliminator, a fuel cell for generating electricity from hydrogen, and a burner for reformer for burning hydrogen gas discharged from the fuel cell and supply the reformer with heat necessary for reforming reaction, wherein the burner for reformer is provided with a flame rod system flame detection means and, at the same time, supplied with hydrogen gas containing a flame detectable amount of fuel gas.Type: GrantFiled: February 24, 2003Date of Patent: September 2, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Masataka Kadowaki, Akira Fuju, Yasuo Miyake, Masatoshi Ueda, Keigo Miyai, Yukinori Akiyama
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Publication number: 20080160362Abstract: The object is to provide a simplified but highly efficient fuel cell system, permitting to perform the flame off detection and so on without supplying the burner with additional raw fuel, even if a flame rod system flame detection means is adopted as burner for reformer. The invention concerns a fuel cell system, comprising a reformer for reforming a hydrocarbon base fuel such as natural gas into hydrogen, a CO transformer, a CO eliminator, a fuel cell for generating electricity from hydrogen, and a burner for reformer for burning hydrogen gas discharged from the fuel cell and supply the reformer with heat necessary for reforming reaction, wherein the burner for reformer is provided with a flame rod system flame detection means and, at the same time, supplied with hydrogen gas containing a flame detectable amount of fuel gas.Type: ApplicationFiled: March 11, 2008Publication date: July 3, 2008Applicant: Sanyo Electric Co., Ltd.Inventors: Masataka Kadowaki, Akira Fuju, Yasuo Miyake, Masatoshi Ueda, Keigo Miyai, Yukinori Akiyama
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Publication number: 20060240313Abstract: A polymer electrolyte fuel cell includes an electrolyte, a first electrode and a second electrode. The first electrode is provided with a catalyst layer which has a catalytic function, a conductive material and a water management layer which is conductive and which manages water moving between the catalyst layer and the base material.Type: ApplicationFiled: March 28, 2006Publication date: October 26, 2006Inventors: Hirofumi Takami, Masataka Kadowaki, Keigo Miyai, Shigeru Sakamoto
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Patent number: 7052787Abstract: Proton-exchange membrane fuel-cell power generating equipment includes a heat exchanger coupled to a process burner and, therethrough, to a fan. When water needs to be heated, such as during startup, the water is circulated through the heat exchanger and the process burner is operated (ignited) to heat the water. When the water needs to be cooled, such as when a hot water reserving tank is full, the water is circulated through the heat exchanger and the fan is operated, but the process burner is not operated, to cool the water. Water is circulated through part or all of a water system to prevent freezing while the system is stopped. Optionally, the process burner is operated to heat the circulated water. The heat exchanger and other heat exchangers in the system are arranged to efficiently recover heat from burners, a fuel-cell cooling system and exothermic processes.Type: GrantFiled: January 9, 2002Date of Patent: May 30, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Osamu Tajima, Katsuya Oda, Tatsuji Hatayama, Ryuji Yukawa, Taketoshi Ouki, Akira Fuju, Koji Shindo, Kazuhiro Tajima, Satoshi Yamamoto, Katsuyuki Makihara, Keigo Miyai, Masataka Kadowaki, Masatoshi Ueda
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Publication number: 20040048117Abstract: The object is to provide a simplified but highly efficient fuel cell system, permitting to perform the flame off detection and so on without supplying the burner with additional raw fuel, even if a flame rod system flame detection means is adopted as burner for reformer. The invention concerns a fuel cell system, comprising a reformer for reforming a hydrocarbon base fuel such as natural gas into hydrogen, a CO transformer, a CO eliminator, a fuel cell for generating electricity from hydrogen, and a burner for reformer for burning hydrogen gas discharged from the fuel cell and supply the reformer with heat necessary for reforming reaction, wherein the burner for reformer is provided with a flame rod system flame detection means and, at the same time, supplied with hydrogen gas containing a flame detectable amount of fuel gas.Type: ApplicationFiled: February 24, 2003Publication date: March 11, 2004Inventors: Masataka Kadowaki, Akira Fuju, Yasuo Miyake, Masatoshi Ueda, Keigo Miyai, Yukinori Akiyama
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Publication number: 20030031900Abstract: The present invention provides a proton-exchange membrane fuel cell power generating equipment that keeps temperature of coolant of a fuel cell in a predetermined temperature range without stop operation of the equipment even when a hot water reserving tank is filled with hot water and the hot water is not discharged to the outside, automatically prevents freezing of a water system during stop operation of the equipment, minimizes maintenance work in a cold region or in the winter season, has high reliability with equipment's service life extended, and supplies hot water heated by efficiently recovering exhaust heat from plural heat exchangers installed in the equipment to the hot water reserving tank. The power generating equipment has a line for circulating and feeding hot water A produced by exchanging heat in the heat exchanger connected to a process gas burner for burning hydrogen until the equipment becomes stable in starting operation.Type: ApplicationFiled: September 10, 2002Publication date: February 13, 2003Inventors: Osamu Tajima, Katsuya Oda, Tatsuji Hatayama, Ryuji Yukawa, Taketoshi Ouki, Akira Fuju, Koji Shindo, Kazuhiro Tajima, Satoshi Yamamoto, Katsuyuki Makihara, Keigo Miyai, Masataka Kadowaki, Masatoshi Ueda
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Patent number: 5541015Abstract: A fuel cell comprising a stack including a stack including a plurality of cell units and a plurality of gas separators and at least one cooling plate, one of the gas separator and the cooling plate being interposed between adjacent cell units, the fuel cell being characterized in that; each gas separator and the cooling plate, respectively, have oxidant gas channels on one of surfaces that opposes to have contact with one of electrode surfaces of the cell unit to as to flow an oxidant gas in a direction vertical to a direction of a cooling air flowing through the cooling plate; each gas separator and the cooling plate, respectively, have fuel gas channels, a fuel-gas-supply inner manifold for taking in a fuel gas, and a fuel-gas-exhaust inner manifold for releasing the fuel gas having passed through the fuel gas channels on the other surface that opposes to have contact with the other electrode surface of the cell unit so as to flow the fuel gas in a direction parallel to the direction of the cooling air flowType: GrantFiled: November 21, 1994Date of Patent: July 30, 1996Assignee: Sanyo Electric Co., Ltd.Inventors: Osamu Tajima, Akira Hamada, Junji Tanaka, deceased, Yasunori Yoshimoto, Keigo Miyai, Nobuyoshi Nishizawa, Masaru Tsutsumi, Tomotoshi Ikenaga, Kunihiro Nakato, Kiyoshi Hori