Patents by Inventor Keiichi HIWATARI

Keiichi HIWATARI 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).

  • Control device and control method of compressor
    Patent number: 9133851
    Abstract: A control device of a compressor includes a valve control unit configured to control an anti-surge valve that returns fluid in a discharge side of the compressor to a suction side of the compressor in accordance with a control parameter, a simulation unit configured to simulate operational status of the compressor in a plant in accordance with a plant model and the control parameter of the plant to which the compressor is installed, and a control parameter adjusting unit configured to adjust the control parameter in accordance with a result of the simulation.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: September 15, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Naoto Ebisawa, Kitami Suzuki, Hideaki Orikasa, Keiichi Hiwatari, Takeshi Miyanaga
  • CONTROL DEVICE AND CONTROL METHOD OF COMPRESSOR
    Publication number: 20120207622
    Abstract: A control device of a compressor includes a valve control unit configured to control an anti-surge valve that returns fluid in a discharge side of the compressor to a suction side of the compressor in accordance with a control parameter, a simulation unit configured to simulate operational status of the compressor in a plant in accordance with a plant model and the control parameter of the plant to which the compressor is installed, and a control parameter adjusting unit configured to adjust the control parameter in accordance with a result of the simulation.
    Type: Application
    Filed: February 10, 2012
    Publication date: August 16, 2012
    Inventors: Naoto EBISAWA, Kitami SUZUKI, Hideaki ORIKASA, Keiichi HIWATARI, Takeshi Miyanaga