Patents by Inventor Atsushi Yoshimi

Atsushi Yoshimi 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: 12140358
    Abstract: A refrigerant cycle system includes: a primary-side cycle of a vapor compression type that circulates a first refrigerant; a secondary-side cycle of a vapor compression type that circulates a second refrigerant; and a cascade heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. The secondary-side cycle includes a secondary-side heat exchanger that uses cold or heat obtained by the second refrigerant from the cascade heat exchanger. The secondary-side heat exchanger includes a flat multi-hole pipe.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: November 12, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro Yamada, Eiji Kumakura, Atsushi Yoshimi, Ikuhiro Iwata, Tomoatsu Minamida
  • Patent number: 12092374
    Abstract: A refrigerant cycle system includes: a first refrigerant circuit that includes a first heat exchanger, a first compressor, and a first cascade heat exchanger and that is configured as a first vapor compression refrigeration cycle; a second refrigerant circuit that includes the first cascade heat exchanger, a second compressor, and a second heat exchanger and that is configured as a second vapor compression refrigeration cycle; a first unit that accommodates the first heat exchanger and the first compressor; a second unit that accommodates the first cascade heat exchanger and the second compressor; and a third unit that accommodates the second heat exchanger. The first unit, the second unit, and the third unit are disposed apart from each other. The first cascade heat exchanger performs heat exchange between a first refrigerant that flows through the first refrigerant circuit and a second refrigerant that flows through the second refrigerant circuit.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: September 17, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro Yamada, Atsushi Yoshimi, Eiji Kumakura, Ikuhiro Iwata, Kazuhiro Furusho, Mikio Kagawa, Michio Moriwaki, Tomoatsu Minamida, Hiromune Matsuoka, Junya Minami
  • Patent number: 12044452
    Abstract: In an air conditioner, during an operation, a gas-liquid two-phase non-azeotropic mixture refrigerant enters a receiver and accumulates in the receiver in a state where a gas phase and a liquid phase are separated. For example, when the non-azeotropic mixture refrigerant includes two components, i.e., a high-boiling refrigerant and a low-boiling refrigerant, the controller may estimate the ratio (composition ratio) between the low-boiling refrigerant and the high-boiling refrigerant in each of the gas phase and the liquid phase based on the temperature and the pressure of the non-azeotropic mixture refrigerant in the receiver. Thus, the controller may estimate the composition ratio of the liquid-phase non-azeotropic mixture refrigerant flowing out of the receiver as the composition ratio of the non-azeotropic mixture refrigerant circulating in the refrigerant circuit.
    Type: Grant
    Filed: September 28, 2023
    Date of Patent: July 23, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji Kumakura, Ryuhei Kaji, Atsushi Yoshimi, Masaki Tanaka, Hiroki Ueda, Masaki Nakayama
  • Patent number: 11994323
    Abstract: There is provided a refrigerant charging method in which a foreign material and moisture are avoided from entering a heat source unit until a refrigeration cycle apparatus is configured. The refrigerant charging method is a method of charging a refrigerant to a refrigerant circuit in which a refrigeration cycle is to be performed by a circulating refrigerant, the refrigerant circuit being configured by connecting a second heat source unit and a utilization unit to each other. The refrigerant charging method includes charging a first refrigerant to the second heat source unit before connecting the second heat source unit to the utilization unit to configure the refrigerant circuit, and connecting the second heat source unit to the utilization unit and charging a second refrigerant that differs from the first refrigerant to the refrigerant circuit to obtain the circulating refrigerant that includes the second refrigerant and the first refrigerant that is charged in the second heat source unit.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: May 28, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro Yamada, Atsushi Yoshimi, Eiji Kumakura, Ikuhiro Iwata, Shun Ohkubo
  • Patent number: 11988426
    Abstract: Efficiency in refrigerant charging work is addressed when a recovered refrigerant recovered from a first heat source unit is to be charged to a second heat source unit. A refrigerant charging method is a charging method used when a first heat source unit of an already installed refrigeration cycle apparatus in which a refrigeration cycle is to be performed by a refrigerant that circulates is to be replaced with a second heat source unit. The refrigerant charging method includes recovering a first refrigerant from an already installed refrigeration cycle apparatus and obtaining a recovered refrigerant and charging the recovered refrigerant and charging a second refrigerant whose composition differs from the composition of the recovered refrigerant to the refrigeration cycle apparatus after renewal that includes the second heat source unit.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: May 21, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro Yamada, Atsushi Yoshimi, Eiji Kumakura, Ikuhiro Iwata, Shun Ohkubo
  • Patent number: 11976859
    Abstract: A refrigeration cycle apparatus includes a refrigeration cycle, an adsorption section, and a first bypass flow path. The refrigeration cycle includes a compressor, a radiator, an expansion mechanism, and an evaporator, and uses a non-azeotropic refrigerant mixture including a first refrigerant and a second refrigerant. The adsorption section includes an adsorbent and stores the first refrigerant adsorbed by the adsorbent. The adsorbent adsorbs the first refrigerant, and does not adsorb the second refrigerant or the adsorption performance thereof for the second refrigerant is lower than the adsorption performance thereof for the first refrigerant. The first bypass flow path connects a first end which is a high-pressure part of the refrigeration cycle and a second end which is a low-pressure part of the refrigeration cycle. The adsorption section and a valve are disposed in the first bypass flow path.
    Type: Grant
    Filed: September 29, 2023
    Date of Patent: May 7, 2024
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroki Ueda, Atsushi Yoshimi, Eiji Kumakura, Masaki Tanaka, Masaki Nakayama, Ryuhei Kaji
  • Patent number: 11906207
    Abstract: A two-stage refrigeration apparatus (500) includes a first cycle (510) and a second cycle (520). The first cycle (510) includes a first compressor (511), a first condenser (512), a first expansion mechanism (513), and a first evaporator (514) that are arranged in such a manner as to be connected to the first cycle. A first refrigerant circulates through the first cycle. The second cycle (520) includes a second downstream-side condenser (523) and a second evaporator (527) that are arranged in such a manner as to be connected to the second cycle. A second refrigerant circulates through the second cycle. The first evaporator (514) and the second downstream-side condenser (523) constitute a cascade condenser (531). In the cascade condenser (531), heat is exchanged between the first refrigerant and the second refrigerant. At least one of the first refrigerant and the second refrigerant is a refrigerant mixture containing at least 1,2-difluoroethylene (HFO-1132(E)).
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: February 20, 2024
    Assignee: 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: 20240027105
    Abstract: A refrigeration cycle apparatus efficiently performs a cooling operation and a heating operation using a low-pressure refrigerant and a high-pressure refrigerant. A refrigeration cycle apparatus using a first refrigerant having 1 MPa or less at 30° C. and a second refrigerant having 1.5 MPa or more at 30° C. performs a heating operation by performing a two-stage refrigeration cycle including a use-side refrigeration cycle using the first refrigerant and a heat-source-side refrigeration cycle using the second refrigerant, and performs a cooling operation by performing a single-stage refrigeration cycle using the first refrigerant.
    Type: Application
    Filed: September 29, 2023
    Publication date: January 25, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Atsushi YOSHIMI, Takuro YAMADA, Eiji KUMAKURA, Ikuhiro IWATA, Takeru MIYAZAKI, Hiroki UEDA, Masaki TANAKA, Masaki NAKAYAMA, Osamu TANAKA, Hirokazu FUJINO, Ryuhei KAJI
  • Publication number: 20240027104
    Abstract: A refrigeration cycle apparatus includes a first refrigerant circuit and a second refrigerant circuit so as to improve the efficiency of operations. A first refrigerant circuit using a first refrigerant having a pressure of 1.2 MPa or less at 30° C. and a second refrigerant circuit using a second refrigerant having a pressure of 1.5 MPa or more at 30° C. are provided, and a dual cycle operation in which the first refrigerant circuit and the second refrigerant circuit are simultaneously operated to exchange heat between the first refrigerant and the second refrigerant and a single cycle operation in which the first refrigerant circuit is operated without operating the second refrigerant circuit to perform a cooling operation or heating operation are enabled in a switchable manner.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 25, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hiroki IKARASHI, Atsushi YOSHIMI, Takuro YAMADA, Eiji KUMAKURA, Ikuhiro IWATA, Ryuhei KAJI, Takeru MIYAZAKI, Hiroki UEDA, Masaki TANAKA, Masaki NAKAYAMA, Hideho SAKAGUCHI, Osamu TANAKA, Hirokazu FUJINO
  • Publication number: 20240027115
    Abstract: In an air conditioner, during an operation, a gas-liquid two-phase non-azeotropic mixture refrigerant enters a receiver and accumulates in the receiver in a state where a gas phase and a liquid phase are separated. For example, when the non-azeotropic mixture refrigerant includes two components, i.e., a high-boiling refrigerant and a low-boiling refrigerant, the controller may estimate the ratio (composition ratio) between the low-boiling refrigerant and the high-boiling refrigerant in each of the gas phase and the liquid phase based on the temperature and the pressure of the non-azeotropic mixture refrigerant in the receiver. Thus, the controller may estimate the composition ratio of the liquid-phase non-azeotropic mixture refrigerant flowing out of the receiver as the composition ratio of the non-azeotropic mixture refrigerant circulating in the refrigerant circuit.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 25, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Ryuhei KAJI, Atsushi YOSHIMI, Masaki TANAKA, Hiroki UEDA, Masaki NAKAYAMA
  • Publication number: 20240019181
    Abstract: A refrigeration cycle apparatus includes a refrigeration cycle, an adsorption section, and a first bypass flow path. The refrigeration cycle includes a compressor, a radiator, an expansion mechanism, and an evaporator, and uses a non-azeotropic refrigerant mixture including a first refrigerant and a second refrigerant. The adsorption section includes an adsorbent and stores the first refrigerant adsorbed by the adsorbent. The adsorbent adsorbs the first refrigerant, and does not adsorb the second refrigerant or the adsorption performance thereof for the second refrigerant is lower than the adsorption performance thereof for the first refrigerant. The first bypass flow path connects a first end which is a high-pressure part of the refrigeration cycle and a second end which is a low-pressure part of the refrigeration cycle. The adsorption section and a valve are disposed in the first bypass flow path.
    Type: Application
    Filed: September 29, 2023
    Publication date: January 18, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hiroki UEDA, Atsushi YOSHIMI, Eiji KUMAKURA, Masaki TANAKA, Masaki NAKAYAMA, Ryuhei KAJI
  • Publication number: 20240019178
    Abstract: A refrigeration cycle apparatus includes a main refrigerant circuit, a changer, and a controller. The main refrigerant circuit uses a non-azeotropic refrigerant mixture containing a first refrigerant and a second refrigerant. The changer changes a composition ratio between the first refrigerant and the second refrigerant in a refrigerant flowing through the main refrigerant circuit. The controller controls an operation of the changer. The controller executes a first mode and a second mode. The first mode is a mode in which the operation of the changing unit is controlled to cause substantially the second refrigerant alone to flow through the main refrigerant circuit. The second mode is a mode in which the operation of the changing unit is controlled to cause a refrigerant mixture of the first refrigerant and the second refrigerant to flow through the main refrigerant circuit.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 18, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masaki TANAKA, Eiji KUMAKURA, Ikuhiro IWATA, Ryuhei KAJI, Atsushi YOSHIMI, Hiroki UEDA, Takuro YAMADA, Masaki NAKAYAMA
  • Publication number: 20240019184
    Abstract: A refrigerant recovery system performs separation of a first refrigerant from a refrigerant including the first refrigerant, and recovery of the refrigerant. The refrigerant recovery system includes a separation unit that perform the separation of the first refrigerant, and a storage unit that stores the refrigerant before the first refrigerant is separated or after the first refrigerant is separated.
    Type: Application
    Filed: September 27, 2023
    Publication date: January 18, 2024
    Inventors: Hiroki UEDA, Atsushi YOSHIMI, Eiji KUMAKURA, Masaki TANAKA, Masaki NAKAYAMA, Ryuhei KAJI
  • Publication number: 20240019183
    Abstract: A refrigerant recovery system includes a cylinder, a first detection unit, and a control unit. The cylinder accommodate a refrigerant filling a refrigeration cycle apparatus. The first detection unit detects a predetermined physical quantity in order to calculate a composition of the refrigerant accommodated in the cylinder. The control unit acquires a result of detection by the first detection unit and outputs the result as a first detection result.
    Type: Application
    Filed: September 26, 2023
    Publication date: January 18, 2024
    Inventors: Ryuhei KAJI, Eiji KUMAKURA, Atsushi YOSHIMI, Masaki TANAKA, Hiroki UEDA, Masaki NAKAYAMA
  • Publication number: 20240019176
    Abstract: A refrigeration cycle apparatus efficiently performs a cooling operation and a heating operation using a low-pressure refrigerant and a high-pressure refrigerant. A refrigeration cycle apparatus performs a heating operation by performing a two-stage refrigeration cycle, the two-stage refrigeration cycle including a use-side refrigeration cycle using a first refrigerant having 1 MPa or less at 30° C. and a heat-source-side refrigeration cycle using a second refrigerant having 1.5 MPa or Imre at 30° C., and performs a cooling operation by performing a single-stage refrigeration cycle using the first refrigerant.
    Type: Application
    Filed: September 29, 2023
    Publication date: January 18, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Atsushi YOSHIMI, Takuro YAMADA, Eiji KUMAKURA, Ikuhiro IWATA, Ryuhei KAJI, Takeru MIYAZAKI, Hiroki UEDA, Masaki TANAKA, Masaki NAKAYAMA
  • Publication number: 20240019177
    Abstract: An air conditioner, which is a heat pump apparatus, includes a refrigerant circuit, a compressor, and a composition adjustment mechanism. The refrigerant circuit circulates a non-azeotropic mixture refrigerant including a first refrigerant and a second refrigerant having a boiling point higher than the first refrigerant. The compressor compresses the non-azeotropic mixture refrigerant. The first refrigerant is a compound represented by a molecular formula having one or more carbon-carbon unsaturated bonds. The composition adjustment mechanism is provided in the refrigerant circuit. The composition adjustment mechanism prevents an increase in the rate of the first refrigerant included in the non-azeotropic mixture refrigerant discharged from the compressor.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 18, 2024
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Ikuhiro IWATA, Eiji KUMAKURA, Tetsushi TSUDA, Shinjiro DOMI, Atsushi YOSHIMI
  • Patent number: 11820933
    Abstract: A refrigeration cycle apparatus (10) includes a refrigerant circuit (11) including a compressor (12), a heat source-side heat exchanger (13), an expansion mechanism (14), and a usage-side heat exchanger (15). In the refrigerant circuit (11), a refrigerant containing at least 1,2-difluoroethylene (HFO-1132 (E)) is sealed. At least during a predetermined operation, in at least one of the heat source-side heat exchanger (13) and the usage-side heat exchanger (15), a flow of the refrigerant and a flow of a heating medium that exchanges heating with the refrigerant are counter flows.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: November 21, 2023
    Assignee: 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: 11739995
    Abstract: A refrigeration cycle device includes a heat source, a first use unit, a second use unit, a first connection flow path, and a second connection flow path. The heat source has a compressor and a heat-source side heat exchanger. The first use unit is separated from the heat source unit and has a first use-side heat exchanger. The second use unit is separated from the heat source unit and has a second use-side heat exchanger. The first connection flow path connects the heat source unit to the first and the second use units and causes a first refrigerant to flow. The second connection flow path connects the heat source unit to the first and the second use units and causes a second refrigerant to flow. A specific enthalpy of the second refrigerant is smaller than a specific enthalpy of the first refrigerant.
    Type: Grant
    Filed: March 30, 2022
    Date of Patent: August 29, 2023
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takuro Yamada, Atsushi Yoshimi, Eiji Kumakura, Ikuhiro Iwata, Takeru Miyazaki, Hiromune Matsuoka
  • Publication number: 20230228464
    Abstract: A heat transfer method uses a heat transfer system including: a heat source unit in which heat is exchanged between a heat transfer medium and a heat source; a utilization unit in which heat is exchanged between the heat transfer medium and a temperature adjustment target; and a first flow path and a second flow path that connect the heat source unit and the utilization unit. The heat transfer medium flows through the first flow path from the heat source unit to the utilization unit, and flows through the second flow path from the utilization unit to the heat source unit. In the heat transfer method, inorganic hydrate slurry, in which an inorganic hydrate that absorbs heat when dissolved in water is mixed with water, is used as the heat transfer medium.
    Type: Application
    Filed: March 23, 2023
    Publication date: July 20, 2023
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takeru MIYAZAKI, Teruo KIDO, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Eiji KUMAKURA
  • Publication number: 20230132359
    Abstract: A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains is a small-GWP refrigerant.
    Type: Application
    Filed: July 16, 2019
    Publication date: April 27, 2023
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Yoshinari ASANO, Keisuke OHTSUKA, Keiji AOTA, Mitsushi ITANO, Shun OHKUBO, Tatsuya TAKAKUWA, Daisuke KARUBE, Yuuki YOTSUMOTO, Kenji GOBOU, Hitomi KUROKI, Tomoyuki GOTOU, Akihito MIZUNO, Yasufu YAMADA, Tatsumi TSUCHIYA, Yuuichi YANAGI, Yoshikazu NAKAO, Takeo ABE, Yumi TODA, Tetsushi TSUDA