Patents by Inventor Yusuke HIJI

Yusuke HIJI 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).

  • Refrigeration device
    Patent number: 10180269
    Abstract: There is disclosed a refrigeration device in which a cooling capability and efficiency can be improved by controlling a high pressure side pressure of a low stage side refrigerant circuit into an optimum value. A refrigeration device 1 includes a high stage side refrigerant circuit 4, first and second low stage side refrigerant circuits 6A and 6B, and cascade heat exchangers 43A and 43B to evaporate a refrigerant of the high stage side refrigerant circuit 4, thereby cooling high pressure side refrigerants of the low stage side refrigerant circuits 6A and 6B, and carbon dioxide is charged as the refrigerant in each of the refrigerant circuits 4, 6A and 6B, and in the device, there are disposed pressure adjusting expansion valves 31 to adjust high pressure side pressures of the low stage side refrigerant circuits 6A and 6B.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: January 15, 2019
    Assignee: Sanden Holdings Corporation
    Inventors: Kosuke Miyagi, Junichi Suda, Yusuke Hiji, Masataka Hayakawa, Kazuhiro Omote
  • REFRIGERATION DEVICE
    Publication number: 20170089614
    Abstract: There is disclosed a refrigeration device in which a cooling capability and efficiency can be improved by controlling a high pressure side pressure of a low stage side refrigerant circuit into an optimum value. A refrigeration device 1 includes a high stage side refrigerant circuit 4, first and second low stage side refrigerant circuits 6A and 6B, and cascade heat exchangers 43A and 43B to evaporate a refrigerant of the high stage side refrigerant circuit 4, thereby cooling high pressure side refrigerants of the low stage side refrigerant circuits 6A and 6B, and carbon dioxide is charged as the refrigerant in each of the refrigerant circuits 4, 6A and 6B, and in the device, there are disposed pressure adjusting expansion valves 31 to adjust high pressure side pressures of the low stage side refrigerant circuits 6A and 6B.
    Type: Application
    Filed: March 16, 2015
    Publication date: March 30, 2017
    Inventors: Kosuke MIYAGI, Junichi SUDA, Yusuke HIJI, Masataka HAYAKAWA, Kazuhiro OMOTE