Patents by Inventor Shunji Itakura
Shunji Itakura 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: 11293647Abstract: The amount of refrigerant to be charged in a refrigerant circuit of an air conditioner is set to a range defined by a lower-limit charge amount and an upper-limit charge amount. The lower-limit charge amount is a charge amount with which a refrigerant supercooling degree is 0 deg and a refrigerant quality is 0 at a refrigerant outlet side of a supercooling heat exchanger when a cooling operation is performed under an overload condition in which the refrigerant is hardly condensed in an outdoor heat exchanger that functions as a condenser. On the other hand, the upper-limit charge amount is a charge amount with which a refrigerant supercooling degree is 0 deg and a refrigerant quality is 0 at a refrigerant outlet side of the outdoor heat exchanger when the cooling operation is performed under a rated condition.Type: GrantFiled: March 28, 2018Date of Patent: April 5, 2022Assignee: FUJITSU GENERAL LIMITEDInventors: Shintaro Sanada, Shunji Itakura, Yu Hirosaki
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Publication number: 20210065205Abstract: According to an embodiment, a certificate issuing apparatus includes a processor that is configured to acquire commodity data relating to a commodity being purchased and for which a certificate can be issued. A paper type or a printer is then selected to be used for issuing the certificate from a plurality of paper types or a plurality of printers. The processor then issues data for printing the certificate on the selected paper type or the printed based on the commodity data.Type: ApplicationFiled: June 25, 2020Publication date: March 4, 2021Inventor: Shunji ITAKURA
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Patent number: 10712058Abstract: A rotary compressor includes: a closed upright cylindrical compressor housing including an upper portion provided with a discharge section of refrigerant and a body portion provided with an intake section of the refrigerant; a compression section disposed at a lower part in the compressor housing and configured to compress the refrigerant suctioned by the intake section to discharge the refrigerant from the discharge section; and a motor disposed at an upper part in the compressor housing and configured to drive the compression section. The motor has a rotor disposed on an inner side and a stator disposed on an outer side, the refrigerant is HFO1123 refrigerant or a refrigerant mixture containing the HFO1123 refrigerant, and an inner welded portion formed by welding using flux is provided within a projection area of the rotor at the upper portion of the compressor housing.Type: GrantFiled: January 29, 2018Date of Patent: July 14, 2020Assignee: FUJITSU GENERAL LIMITEDInventors: Shunji Itakura, Ken Horiguchi, Toshiyuki Fuji, Sota Shimada, Kazuya Funada, Kenji Komine, Junya Tanaka
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Publication number: 20200158352Abstract: The amount of refrigerant to be charged in a refrigerant circuit of an air conditioner is set to a range defined by a lower-limit charge amount and an upper-limit charge amount. The lower-limit charge amount is a charge amount with which a refrigerant supercooling degree is 0 deg and a refrigerant quality is 0 at a refrigerant outlet side of a supercooling heat exchanger when a cooling operation is performed under an overload condition in which the refrigerant is hardly condensed in an outdoor heat exchanger that functions as a condenser. On the other hand, the upper-limit charge amount is a charge amount with which a refrigerant supercooling degree is 0 deg and a refrigerant quality is 0 at a refrigerant outlet side of the outdoor heat exchanger when the cooling operation is performed under a rated condition.Type: ApplicationFiled: March 28, 2018Publication date: May 21, 2020Inventors: Shintaro SANADA, Shunji ITAKURA, Yu HIROSAKI
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Patent number: 10359201Abstract: A heat exchanger includes: a heat transfer pipe in which refrigerant flows; and a spiral groove formed at an inner peripheral surface of the heat transfer pipe. A height of an inner wall of the groove in a radial direction of the heat transfer pipe is equal to or greater than 0.1 [mm], and when a wetted edge length of the heat transfer pipe is S, an inclination angle between a pipe axis direction of the heat transfer pipe and a longitudinal direction of the groove in a section of the heat transfer pipe parallel with the pipe axis direction is ?, and a length of the heat transfer pipe is L, the inclination angle ? is an acute angle, and a wetted area S×L/cos ? of the heat transfer pipe satisfies S×L/cos ??0.5 [m2].Type: GrantFiled: January 29, 2018Date of Patent: July 23, 2019Assignee: FUJITSU GENERAL LIMITEDInventors: Shunji Itakura, Ken Horiguchi, Toshiyuki Fuji, Sota Shimada, Kazuya Funada, Kenji Komine, Junya Tanaka
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Publication number: 20180216837Abstract: A heat exchanger includes: a heat transfer pipe in which refrigerant flows; and a spiral groove formed at an inner peripheral surface of the heat transfer pipe. A height of an inner wall of the groove in a radial direction of the heat transfer pipe is equal to or greater than 0.1 [mm], and when a wetted edge length of the heat transfer pipe is S, an inclination angle between a pipe axis direction of the heat transfer pipe and a longitudinal direction of the groove in a section of the heat transfer pipe parallel with the pipe axis direction is —0, and a length of the heat transfer pipe is L, the inclination angle ? is an acute angle, and a wetted area S×L/cos ? of the heat transfer pipe satisfies S×L/cos ??0.5 [m2].Type: ApplicationFiled: January 29, 2018Publication date: August 2, 2018Applicant: FUJITSU GENERAL LIMITEDInventors: Shunji ITAKURA, Ken HORIGUCHI, Toshiyuki FUJI, Sota SHIMADA, Kazuya FUNADA, Kenji KOMINE, Junya TANAKA
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Publication number: 20180216856Abstract: A rotary compressor includes: a closed upright cylindrical compressor housing including an upper portion provided with a discharge section of refrigerant and a body portion provided with an intake section of the refrigerant; a compression section disposed at a lower part in the compressor housing and configured to compress the refrigerant suctioned by the intake section to discharge the refrigerant from the discharge section; and a motor disposed at an upper part in the compressor housing and configured to drive the compression section. The motor has a rotor disposed on an inner side and a stator disposed on an outer side, the refrigerant is HFO1123 refrigerant or a refrigerant mixture containing the HFO1123 refrigerant, and an inner welded portion formed by welding using flux is provided within a projection area of the rotor at the upper portion of the compressor housing.Type: ApplicationFiled: January 29, 2018Publication date: August 2, 2018Applicant: FUJITSU GENERAL LIMITEDInventors: Shunji ITAKURA, Ken HORIGUCHI, Toshiyuki FUJI, Sota SHIMADA, Kazuya FUNADA, Kenji KOMINE, Junya TANAKA
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Publication number: 20160002517Abstract: A mixture refrigerant includes: 50 wt. % to 70 wt. % of R32, R1234ze, and R125. An air conditioner includes a mixture refrigerant containing 50 wt. % to 70 wt. % of R32, R1234ze, and R125.Type: ApplicationFiled: June 19, 2015Publication date: January 7, 2016Inventors: Shunji ITAKURA, Kazuya FUNADA, Toshiyuki FUJI, Yuji TSUCHIYA, Masahiro KONDO
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Publication number: 20110154847Abstract: In an air conditioner having a double-pipe heat exchanger in a refrigerating cycle, the degree of opening of a bypass expansion valve is controlled easily without liquid return to a compressor and without considering the state of a low-pressure two-phase refrigerant in the double-pipe heat exchanger.Type: ApplicationFiled: December 7, 2010Publication date: June 30, 2011Applicant: FUJITSU GENERAL LIMITEDInventor: Shunji Itakura
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Patent number: 6523235Abstract: A method of manufacturing a ceramic capacitor relates to a ceramic capacitor having metal plate terminals that absorb thermal stress and mechanical stress caused by flexure of the substrate. A ceramic capacitor element is provided with terminal electrodes at the two side end surfaces facing opposite each other. The metal plate terminals are each connected to one of the terminal electrodes at one end thereof, are each provided with a folded portion in a middle area and a terminal portion to be connected to the outside toward the other end from the folded portion.Type: GrantFiled: October 27, 2000Date of Patent: February 25, 2003Assignee: TDK CorporationInventors: Takaya Ishigaki, Masatoshi Ishikawa, Takashi Kamiya, Shunji Itakura, Yuji Aiba, Masanori Yamamoto
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Patent number: 6310759Abstract: The present invention relates to a ceramic capacitor having metal plate terminals that absorb thermal stress and mechanical stress caused by flexure of the substrate. A ceramic capacitor element is provided with terminal electrodes at the two side end surfaces facing opposite each other. The metal plate terminals are each connected to one of the terminal electrodes at one end thereof, are each provided with a folded portion in a middle area and a terminal portion to be connected to the outside toward the other end from the folded portion.Type: GrantFiled: December 21, 2000Date of Patent: October 30, 2001Assignee: TDK CorporationInventors: Takaya Ishigaki, Masatoshi Ishikawa, Takashi Kamiya, Shunji Itakura, Yuji Aiba, Masanori Yamamoto
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Publication number: 20010001258Abstract: The present invention relates to a ceramic capacitor having metal plate terminals that absorb thermal stress and mechanical stress caused by flexure of the substrate. A ceramic capacitor element is provided with terminal electrodes at the two side end surfaces facing opposite each other. The metal plate terminals are each connected to one of the terminal electrodes at one end thereof, are each provided with a folded portion in a middle area and a terminal portion to be connected to the outside toward the other end from the folded portion.Type: ApplicationFiled: December 21, 2000Publication date: May 17, 2001Applicant: TDK CorporationInventors: Takaya Ishigaki, Masatoshi Ishikawa, Takashi Kamiya, Shunji Itakura, Yuji Aiba, Masanori Yamamoto
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Patent number: 6191933Abstract: The present invention relates to a ceramic capacitor having metal plate terminals that absorb thermal stress and mechanical stress caused by flexure of the substrate. A ceramic capacitor element is provided with terminal electrodes at the two side end surfaces facing opposite each other. The metal plate terminals are each connected to one of the terminal electrodes at one end thereof, are each provided with a folded portion in a middle area and a terminal portion to be connected to the outside toward the other end from the folded portion.Type: GrantFiled: January 5, 1999Date of Patent: February 20, 2001Assignee: TDK CorporationInventors: Takaya Ishigaki, Masatoshi Ishikawa, Takashi Kamiya, Shunji Itakura, Yuji Aiba, Masanori Yamamoto