Patents by Inventor Yuzo Komatsu

Yuzo Komatsu 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).

  • Publication number: 20200325375
    Abstract: A refrigeration cycle apparatus capable of keeping a LCCP low when a heat cycle is performed using a sufficiently small-GWP refrigerant, and a method of determining a refrigerant enclosure amount in the refrigeration cycle apparatus are provided. An outdoor unit (20) including a compressor (21) and an outdoor heat exchanger (23), an indoor unit (30) including an indoor heat exchanger (31), and a refrigerant pipe (5, 6) that connects the outdoor unit (20) and the indoor unit (30) to each other are provided. A refrigerant containing at least 1,2-difluoroethylene is enclosed in a refrigerant circuit (10) that is constituted by connecting the compressor (21), the outdoor heat exchanger (23), and the indoor heat exchanger (31) to one another. An enclosure amount of the refrigerant in the refrigerant circuit (10) per 1 kW of refrigeration capacity satisfies a condition of 160 g or more and 560 g or less.
    Type: Application
    Filed: June 25, 2020
    Publication date: October 15, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Yuzo KOMATSU, Shun OHKUBO, Tatsuya TAKAKUWA
  • Publication number: 20200326102
    Abstract: An air conditioning unit capable of performing a refrigeration cycle using a small-GWP refrigerant is provided. A refrigeration cycle apparatus (1, 1a to 1m) includes a refrigerant circuit (10) including a compressor (21), a condenser (23, 31, 36), a decompressing section (24, 44, 45, 33, 38), and an evaporator (31, 36, 23), and a refrigerant containing at least 1,2-difluoroethylene enclosed in the refrigerant circuit (10).
    Type: Application
    Filed: June 25, 2020
    Publication date: October 15, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Tatsuya TAKAKUWA, Yuzo KOMATSU, Shun OHKUBO
  • Publication number: 20200326100
    Abstract: A warm-water generating apparatus (1) uses, as a refrigerant, a mixed refrigerant containing at least 1,2-difluoroethylene (HFO-1132(E)). The warm-water generating apparatus (1) includes a compressor (21), a heat-source-side air heat exchanger (24), an expansion valve (23), and a use-side water heat exchanger (22). The water heat exchanger (22) causes the mixed refrigerant flowing therein and first water to exchange heat with each other to heat the first water.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 15, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masanori UKIBUNE, Atsushi OKAMOTO, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Yuzo KOMATSU, Shun OHKUBO, Tatsuya TAKAKUWA
  • Publication number: 20200309437
    Abstract: A refrigeration cycle apparatus capable of keeping a LCCP low when a heat cycle is performed using a sufficiently small-GWP refrigerant, and a method of determining a refrigerant enclosure amount in the refrigeration cycle apparatus are provided. An outdoor unit (20) including a compressor (21) and an outdoor heat exchanger (23), an indoor unit (30) including an indoor heat exchanger (31), and a refrigerant pipe (5, 6) that connects the outdoor unit (20) and the indoor unit (30) to each other are provided. A refrigerant containing at least 1,2-difluoroethylene is enclosed in a refrigerant circuit (10) that is constituted by connecting the compressor (21), the outdoor heat exchanger (23), and the indoor heat exchanger (31) to one another. An enclosure amount of the refrigerant in the refrigerant circuit (10) per 1 kW of refrigeration capacity satisfies a condition of 160 g or more and 560 g or less.
    Type: Application
    Filed: December 10, 2018
    Publication date: October 1, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Yuzo KOMATSU, Shun OHKUBO, Tatsuya TAKAKUWA
  • Publication number: 20200309411
    Abstract: A warm-water generating apparatus (1) uses, as a refrigerant, a mixed refrigerant containing at least 1,2-difluoroethylene (HFO-1132(E)). The warm-water generating apparatus (1) includes a compressor (21), a heat-source-side air heat exchanger (24), an expansion valve (23), and a use-side water heat exchanger (22). The water heat exchanger (22) causes the mixed refrigerant flowing therein and first water to exchange heat with each other to heat the first water.
    Type: Application
    Filed: December 13, 2018
    Publication date: October 1, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masanori UKIBUNE, Atsushi OKAMOTO, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Yuzo KOMATSU, Shun OHKUBO, Tatsuya TAKAKUWA
  • Publication number: 20200309419
    Abstract: A refrigeration cycle apparatus that is able to reduce the amount of refrigerant used while reducing a pressure loss in the case where a refrigerant containing at least 1,2-difluoroethylene is used is provided. In an air conditioner (1) including a refrigerant circuit (10), including a compressor (21), an outdoor heat exchanger (23), an outdoor expansion valve (24), and an indoor heat exchanger (31), and a refrigerant containing at least 1,2-difluoroethylene and sealed in the refrigerant circuit (10), the outdoor heat exchanger (23) has a heat transfer tube (23b) of which a pipe diameter is greater than or equal to 6.35 mm and less than 10.0 mm.
    Type: Application
    Filed: December 18, 2018
    Publication date: October 1, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Tatsuya TAKAKUWA, Yuzo KOMATSU, Shun OHKUBO
  • Patent number: 10707404
    Abstract: In a piezoelectric element, internal stress generated in an inactive portion at the time of sintering when a piezoelectric element is fabricated or stress applied from the outside to the inactive portion is absorbed by a recess of a lower surface of a first through hole conductor and a recess of an upper surface of a second through hole conductor. Accordingly, for example, deformation, rupture, or the like of the through hole conductor is prevented, and conduction failure or disconnection of an electrode layer or a through hole conductor is prevented. Further, in the inactive portion, since a protrusion of the piezoelectric layer enters the recess of the through hole conductor, a holding force of the piezoelectric layer with respect to the through hole conductor increases, and deformation of the through hole conductor is prevented or obstructed.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: July 7, 2020
    Assignee: TDK CORPORATION
    Inventors: Yoshiki Ohta, Satoshi Sasaki, Yoshiaki Ohta, Takahiro Kezuka, Katsuya Inaba, Rin Sato, Kazushi Tachimoto, Masayoshi Inoue, Yuzo Komatsu
  • Publication number: 20200148929
    Abstract: Provided is a refrigerant composition that has a low GWP; is non-flammable or mildly flammable; and has a refrigerating capacity (Cap) and/or coefficient of performance (COP) equivalent to or higher than those of traditional refrigerants, such as R-134a, R-410A, R-123, or R-404A, when used as an alternative refrigerant for these traditional refrigerants. Specifically, provided is a refrigerant composition containing FO-1216 and a hydrofluoroolefin, wherein the hydrofluoroolefin is at least one member of HFO-1234ze and HFO-1243zf.
    Type: Application
    Filed: June 27, 2018
    Publication date: May 14, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuki YOTSUMOTO, Ikumi TOMOTSUKA, Akihito MIZUNO, Yuzo KOMATSU
  • Patent number: 10407368
    Abstract: The present invention provides a method for producing a fluorine-containing haloolefin compound, the method easily inhibiting catalyst deactivation, and the method being capable of inhibiting a decrease in conversion and selectivity in the reaction, even when the reaction is continued for a long period of time. The present invention is a method for producing a fluorine-containing haloolefin compound via a step of fluorinating a C3 halogenated hydrocarbon. The method comprises a step of removing a stabilizer contained in the C3 halogenated hydrocarbon before the fluorination step.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: September 10, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke Karube, Masayuki Kishimoto, Yuzo Komatsu
  • Patent number: 10301238
    Abstract: This invention provides a process for producing 2-chloro-3,3,3-trifluoropropene, comprising: reacting anhydrous hydrogen fluoride with at least one chlorine-containing compound selected from the group consisting of chloropropanes and chloropropenes represented by specific formulas in a gas phase in the presence of a chromium atom-containing fluorination catalyst while heating, the reaction being carried out in the presence of molecular chlorine or with a water content in the reaction system of 300 ppm or less. This invention enables suppression of catalyst deterioration and efficient production of 2-chloro-3,3,3-trifluoropropene in a simple and economically advantageous manner on an industrial scale.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: May 28, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuzo Komatsu, Masayuki Kishimoto
  • Patent number: 10266464
    Abstract: This invention provides a process for producing 2-chloro-3,3,3-trifluoropropene, comprising: reacting anhydrous hydrogen fluoride with at least one chlorine-containing compound selected from the group consisting of chloropropanes and chloropropenes represented by specific formulas in a gas phase in the presence of a chromium atom-containing fluorination catalyst while heating, the reaction being carried out in the presence of molecular chlorine or with a water content in the reaction system of 300 ppm or less. This invention enables suppression of catalyst deterioration and efficient production of 2-chloro-3,3,3-trifluoropropene in a simple and economically advantageous manner on an industrial scale.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: April 23, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuzo Komatsu, Masayuki Kishimoto
  • Patent number: 10173952
    Abstract: This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time wherein unreacted materials are reused after distillation without liquid-liquid separation to suppress catalyst deactivation.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: January 8, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya Takakuwa, Kazuhiro Takahashi, Daisuke Karube, Takehiro Chaki, Masayuki Kishimoto, Yuzo Komatsu
  • Publication number: 20180370877
    Abstract: This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time while suppressing catalyst deactivation. This invention provides a method for producing 2,3,3,3-tetrafluoropropene, the method comprising: (d) reacting 2-chloro-3,3,3-trifluoropropene with hydrogen fluoride in the presence of a catalyst; (e) subjecting the reaction mixture obtained in step (d) to distillation to separate the mixture into a first stream comprising 2,3,3,3-tetrafluoropropene as a main component and a second stream comprising unreacted hydrogen fluoride and organic matter containing unreacted 2-chloro-3,3,3-trifluoropropene as main components; and (f) recycling the second stream separated in step (e) above to the reaction of step (d), wherein the distillation of step (e) is performed under conditions that satisfy the relationship of a specific equation.
    Type: Application
    Filed: December 19, 2016
    Publication date: December 27, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI, Daisuke KARUBE, Takehiro CHAKI, Masayuki KISHIMOTO, Yuzo KOMATSU
  • Publication number: 20180237365
    Abstract: The present invention provides a method for producing a fluorine-containing haloolefin compound, the method easily inhibiting catalyst deactivation, and the method being capable of inhibiting a decrease in conversion and selectivity in the reaction, even when the reaction is continued for a long period of time. The present invention is a method for producing a fluorine-containing haloolefin compound via a step of fluorinating a C3 halogenated hydrocarbon. The method comprises a step of removing a stabilizer contained in the C3 halogenated hydrocarbon before the fluorination step.
    Type: Application
    Filed: October 8, 2015
    Publication date: August 23, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke KARUBE, Masayuki KISHIMOTO, Yuzo KOMATSU
  • Patent number: 10053405
    Abstract: The present invention provides a method for producing a fluorine-containing haloolefin compound, said method being able to reduce the generation of overly fluorinated compounds as by-products in the production of the fluorine-containing haloolefin compound and produce the target product of high purity at a high yield. The invention also provides a halogenated hydrocarbon composition. The method for producing a haloolefin compound through the step of fluorinating a starting material containing at least one of a pentachloropropane or a tetrachloropropene in the presence of a fluorinating agent in a reactor, according to the present invention, includes the step of adding hydrogen chloride to the reactor. The composition according to the present invention contains: at least one member selected from the group consisting of a pentachloropropane and a tetrachloropropene; and hydrogen chloride.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: August 21, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke Karube, Masayuki Kishimoto, Yuzo Komatsu, Takehiro Chaki
  • Publication number: 20180013056
    Abstract: In a piezoelectric element, internal stress generated in an inactive portion at the time of sintering when a piezoelectric element is fabricated or stress applied from the outside to the inactive portion is absorbed by a recess of a lower surface of a first through hole conductor and a recess of an upper surface of a second through hole conductor. Accordingly, for example, deformation, rupture, or the like of the through hole conductor is prevented, and conduction failure or disconnection of an electrode layer or a through hole conductor is prevented. Further, in the inactive portion, since a protrusion of the piezoelectric layer enters the recess of the through hole conductor, a holding force of the piezoelectric layer with respect to the through hole conductor increases, and deformation of the through hole conductor is prevented or obstructed.
    Type: Application
    Filed: July 3, 2017
    Publication date: January 11, 2018
    Applicant: TDK CORPORATION
    Inventors: Yoshiki OHTA, Satoshi SASAKI, Yoshiaki OHTA, Takahiro KEZUKA, Katsuya INABA, Rin SATO, Kazushi TACHIMOTO, Masayoshi INOUE, Yuzo KOMATSU
  • Publication number: 20170275220
    Abstract: This invention provides a process for producing 2-chloro-3,3,3-trifluoropropene, comprising: reacting anhydrous hydrogen fluoride with at least one chlorine-containing compound selected from the group consisting of chloropropanes and chloropropenes represented by specific formulas in a gas phase in the presence of a chromium atom-containing fluorination catalyst while heating, the reaction being carried out in the presence of molecular chlorine or with a water content in the reaction system of 300 ppm or less. This invention enables suppression of catalyst deterioration and efficient production of 2-chloro-3,3,3-trifluoropropene in a simple and economically advantageous manner on an industrial scale.
    Type: Application
    Filed: June 9, 2017
    Publication date: September 28, 2017
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuzo KOMATSU, Masayuki KISHIMOTO
  • Patent number: 9738589
    Abstract: The object of the present invention is to provide a process for producing ?-fluoroacrylic acid ester at a high starting material conversion, high selectivity, and high yield. The present invention provides a process for producing the compound represented by the formula (1) wherein R represents alkyl optionally substituted with one or more fluorine atoms, the process comprising step A of reacting a compound represented by the formula (2) wherein X represents a bromine atom or a chlorine atom with an alcohol represented by the formula (3) wherein the symbol is as defined above, and carbon monoxide in the presence of a transition metal catalyst and a base to thereby obtain the compound represented by the formula (1).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: August 22, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya Ohtsuka, Akihiro Gotou, Sumi Ishihara, Yoshihiro Yamamoto, Akinori Yamamoto, Yoshichika Kuroki, Yuzo Komatsu, Yousuke Kishikawa
  • Publication number: 20170217860
    Abstract: The present invention provides a method for producing a fluorine-containing haloolefin compound, said method being able to reduce the generation of overly fluorinated compounds as by-products in the production of the fluorine-containing haloolefin compound and produce the target product of high purity at a high yield. The invention also provides a halogenated hydrocarbon composition. The method for producing a haloolefin compound through the step of fluorinating a starting material containing at least one of a pentachloropropane or a tetrachloropropene in the presence of a fluorinating agent in a reactor, according to the present invention, includes the step of adding hydrogen chloride to the reactor. The composition according to the present invention contains: at least one member selected from the group consisting of a pentachloropropane and a tetrachloropropene; and hydrogen chloride.
    Type: Application
    Filed: October 7, 2015
    Publication date: August 3, 2017
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke KARUBE, Masayuki KISHIMOTO, Yuzo KOMATSU, Takehiro CHAKI
  • Publication number: 20170217859
    Abstract: This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time wherein unreacted materials are reused after distillation without liquid-liquid separation to suppress catalyst deactivation.
    Type: Application
    Filed: June 16, 2015
    Publication date: August 3, 2017
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI, Daisuke KARUBE, Takehiro CHAKI, Masayuki KISHIMOTO, Yuzo KOMATSU