Patents by Inventor Naruhiro SEKINE

Naruhiro SEKINE 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: 11428450
    Abstract: An air conditioner includes an outdoor unit, a plurality of indoor units, a plurality of expansion valves which are provided upstream of indoor heat exchangers, a plurality of on-off valves which are provided upstream of the expansion valves, and control unit wherein when the indoor units include a stopping indoor unit and an operating indoor unit currently operating, and when a stopping of the stopping unit is due to thermostat-off operation, the control unit performs a procedure to stop the stopping unit, the procedure including closing an on-off valve that corresponds to the stopping unit and driving an indoor fan in the stopping unit until pressure in a part between the on-off valve and an expansion valve that corresponds to the stopping unit and pressure in a part downstream of the first expansion valve are equalized, fully opening the expansion valve, and stopping the indoor fan.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: August 30, 2022
    Assignee: FUJITSU GENERAL LIMITED
    Inventors: Shintaro Sanada, Yu Hirosaki, Naruhiro Sekine, Ryo Takaoka, Koya Aoki, Tatsuro Yamazaki
  • Publication number: 20210018236
    Abstract: An air conditioner includes an outdoor unit, a plurality of indoor units, a plurality of expansion valves which are provided upstream of indoor heat exchangers, a plurality of on-off valves which are provided upstream of the expansion valves, and control unit wherein when the indoor units include a stopping indoor unit and an operating indoor unit currently operating, and when a stopping of the stopping unit is due to thermostat-off operation, the control unit performs a procedure to stop the stopping unit, the procedure including closing an on-off valve that corresponds to the stopping unit and driving an indoor fan in the stopping unit until pressure in a part between the on-off valve and an expansion valve that corresponds to the stopping unit and pressure in a part downstream of the first expansion valve are equalized, fully opening the expansion valve, and stopping the indoor fan.
    Type: Application
    Filed: February 15, 2019
    Publication date: January 21, 2021
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Shintaro SANADA, Yu HIROSAKI, Naruhiro SEKINE, Ryo TAKAOKA, Koya AOKI, Tatsuro YAMAZAKI