Patents by Inventor Yoshibumi Sugihara

Yoshibumi Sugihara 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).

  • Air conditioning plant and control method thereof
    Patent number: 6732540
    Abstract: Provided are an air conditioning plant control method by which an air conditioning plant can be operated in a most desirable state, and an air conditioning plant so controlled. An air conditioning plant is controlled, which has at least one air conditioner, a refrigerating machine supplying cold water to the air conditioner and a cooling tower supplying cooling water to the refrigerating machine. Within an extent satisfying set conditions of air conditioning, setpoints of the draft temperature of the at least one air conditioner, the cold water temperature of the refrigerating machine and the temperature of cooling water from the cooling tower are altered and optimized so as to minimize energy consumption, operating cost or carbon dioxide emission of the air conditioning plant.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: May 11, 2004
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Yoshibumi Sugihara, Yuuji Miyajima, Takumi Sugiura, Hiroo Sakai, Noboru Oshima, Tadakatsu Nakajima, Hiroshige Kikuchi
  • Air conditioning plant and control method thereof
    Publication number: 20040011066
    Abstract: Provided are an air conditioning plant control method by which an air conditioning plant can be operated in a most desirable state, and an air conditioning plant so controlled. An air conditioning plant is controlled, which has at least one air conditioner, a refrigerating machine supplying cold water to the air conditioner and a cooling tower supplying cooling water to the refrigerating machine. Within an extent satisfying set conditions of air conditioning, setpoints of the draft temperature of the at least one air conditioner, the cold water temperature of the refrigerating machine and the temperature of cooling water from the cooling tower are altered and optimized so as to minimize energy consumption, operating cost or carbon dioxide emission of the air conditioning plant.
    Type: Application
    Filed: December 19, 2002
    Publication date: January 22, 2004
    Applicant: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Yoshibumi Sugihara, Yuuji Miyajima, Takumi Sugiura, Hiroo Sakai, Noboru Oshima, Tadakatsu Nakajima, Hiroshige Kikuchi