Patents by Inventor Daisuke Oota

Daisuke Oota 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).

  • TWO-STAGE PRESSURISING REFRIGERATION CYCLE DEVICE
    Publication number: 20130104584
    Abstract: A refrigerant discharge capacity of a high-pressure side compression mechanism and a refrigerant discharge capacity of a low-pressure side compression mechanism can be independently controlled, in a two-stage pressurizing refrigeration cycle device. The refrigerant discharge capacity of the low-pressure side compression mechanism is determined based on an outside air temperature, an air temperature at the evaporator, and a preset temperature. Furthermore, the refrigerant discharge capacity of the high-pressure side compression mechanism is determined based on the determined refrigerant discharge capacity of the low-pressure side compression mechanism such that an effective capacity ratio is not less than 1 nor more than 3. Therefore, in the two-stage pressurizing refrigeration cycle device, COP can be improved with a simple structure and control.
    Type: Application
    Filed: July 6, 2011
    Publication date: May 2, 2013
    Applicant: DENSO CORPORATION
    Inventors: Ryo Takizawa, Masami Taniguchi, Daisuke Oota, Jun Yamazaki, Junichi Katsuragawa