Patents by Inventor Tatsuya MOCHIDA

Tatsuya MOCHIDA 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 conditioner and defrosting operation method therefor
    Patent number: 10473353
    Abstract: A hot gas bypass circuit that connects a discharge side of the compressor and a portion between the heat source side heat exchanger and the expansion valve, an on-off valve that opens and closes a channel of the hot gas bypass circuit, and a control device performing control to select one of hot gas bypass defrosting and reverse cycle defrosting according to a frosting amount on the heat source side heat exchanger and perform defrosting. The control device controls to open the on-off valve of the hot gas bypass circuit such that a part of a refrigerant discharged from the compressor is supplied to the heat source side heat exchanger via the hot gas bypass circuit and, the control device switches switch the four-way valve such that the refrigerant discharged from the compressor is supplied to the heat source side heat exchanger after passing through the four-way valve.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: November 12, 2019
    Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.
    Inventors: Kazuhiko Tani, Koji Naito, Tatsuya Mochida, Kazumoto Urata, Yoshiyuki Akiyama, Masami Inaba
  • AIR CONDITIONER AND DEFROSTING OPERATION METHOD THEREFOR
    Publication number: 20170038125
    Abstract: A hot gas bypass circuit that connects a discharge side of the compressor and a portion between the heat source side heat exchanger and the expansion valve, an on-off valve that opens and closes a channel of the hot gas bypass circuit, and a control device performing control to select one of hot gas bypass defrosting and reverse cycle defrosting according to a frosting amount on the heat source side heat exchanger and perform defrosting. The control device controls to open the on-off valve of the hot gas bypass circuit such that a part of a refrigerant discharged from the compressor is supplied to the heat source side heat exchanger via the hot gas bypass circuit and, the control device switches switch the four-way valve such that the refrigerant discharged from the compressor is supplied to the heat source side heat exchanger after passing through the four-way valve.
    Type: Application
    Filed: April 22, 2014
    Publication date: February 9, 2017
    Applicant: Hitachi Appliances, Inc.
    Inventors: Kazuhiko TANI, Koji NAITO, Tatsuya MOCHIDA, Kazumoto URATA, Yoshiyuki AKIYAMA, Masami INABA