Patents by Inventor Shuuji KUMAMOTO

Shuuji KUMAMOTO 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).

  • Vehicle air-conditioning device
    Patent number: 10994586
    Abstract: A vehicle air-conditioning device is a heat pump type vehicle air-conditioning device including an external heat exchanger that performs heat exchange between refrigerant flowing the inside thereof and outside air. With the vehicle air-conditioning device, a controller functions as a temperature-difference calculation unit that calculates the temperature difference ?T between the refrigerant in a refrigerant flow path on the exit side of the external heat exchanger and the outside air, and in addition, the controller functions as a frost formation determination unit that determines that frost formation is caused on the external heat exchanger on the basis of the elapsed time to of a state in which the temperature difference ?T is equal to or larger than a frost-formation temperature difference at which the frost formation may be caused on the external heat exchanger.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: May 4, 2021
    Assignee: MARELLI CABIN COMFORT JAPAN CORPORATION
    Inventors: Takayuki Ishikawa, Yunhan Ri, Koujirou Nakamura, Tomohiro Maeda, Shuuji Kumamoto
  • VEHICLE AIR-CONDITIONING DEVICE
    Publication number: 20170361679
    Abstract: A vehicle air-conditioning device is a heat pump type vehicle air-conditioning device including an external heat exchanger that performs heat exchange between refrigerant flowing the inside thereof and outside air. With the vehicle air-conditioning device, a controller functions as a temperature-difference calculation unit that calculates the temperature difference ?T between the refrigerant in a refrigerant flow path on the exit side of the external heat exchanger and the outside air, and in addition, the controller functions as a frost formation determination unit that determines that frost formation is caused on the external heat exchanger on the basis of the elapsed time to of a state in which the temperature difference ?T is equal to or larger than a frost-formation temperature difference at which the frost formation may be caused on the external heat exchanger.
    Type: Application
    Filed: December 17, 2015
    Publication date: December 21, 2017
    Applicant: CALSONIC KANSEI CORPORATION
    Inventors: Takayuki ISHIKAWA, Yunhan RI, Koujirou NAKAMURA, Tomohiro MAEDA, Shuuji KUMAMOTO