Patents by Inventor Zhijia REN

Zhijia REN 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).

  • GAS COMPRESSION SYSTEM AND CONTROL METHOD THEREOF
    Publication number: 20240026874
    Abstract: A gas compression system that can continue control of the number of operated pieces of a compressor even when an abnormality has occurred and a control method thereof are provided. The gas compression system includes compressors, a number-of-pieces controller that executes master control to control the number of operated pieces of the compressor, and a communication network that connects the compressors and the number-of-pieces controller with each other in a mutually communicable manner. Each compressor includes a compressor main unit that compresses a gas and a controller that executes slave control to control the compressor main unit in response to a command from the number-of-pieces controller.
    Type: Application
    Filed: February 5, 2021
    Publication date: January 25, 2024
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhijia REN, Norio AOYAGI
  • Scroll compressor with two step inverter control
    Patent number: 11603839
    Abstract: An object of the present invention is to provide a scroll compressor with a simple configuration which is capable of preventing the occurrence of noise induced due to compressed air remaining in a discharge pipe flow backward and an orbiting scroll rotating reversely when stopping the compressor.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: March 14, 2023
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhijia Ren, Yoshiyuki Kanemoto
  • Air compressing apparatus and control method
    Patent number: 11193482
    Abstract: The purpose of the present invention is to provide an air compressing apparatus capable of establishing a sufficient air-filling rate while reducing noise at the initiation of operations.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: December 7, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhijia Ren, Yoshiyuki Kanemoto
  • Fluid compression system and control device therefor
    Patent number: 10514026
    Abstract: An object of the present invention is to provide a fluid compression system which can supply compressed fluid in accordance with a sudden change in an amount of fluid used even when the number of compressors to be installed is increased, and a control device thereof.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: December 24, 2019
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhijia Ren, Hironobu Takayasu, Yoshiyuki Kanemoto
  • Scroll Compressor
    Publication number: 20190345935
    Abstract: An object of the present invention is to provide a scroll compressor with a simple configuration which is capable of preventing the occurrence of noise induced due to compressed air remaining in a discharge pipe flow backward and an orbiting scroll rotating reversely when stopping the compressor.
    Type: Application
    Filed: January 27, 2017
    Publication date: November 14, 2019
    Inventors: Zhijia REN, Yoshiyuki KANEMOTO
  • Air Compressing Apparatus and Control Method
    Publication number: 20180223832
    Abstract: The purpose of the present invention is to provide an air compressing apparatus capable of establishing a sufficient air-filling rate while reducing noise at the initiation of operations.
    Type: Application
    Filed: December 17, 2014
    Publication date: August 9, 2018
    Inventors: Zhijia REN, Yoshiyuki KANEMOTO
  • Fluid Compression System and Control Device Therefor
    Publication number: 20150370265
    Abstract: An object of the present invention is to provide a fluid compression system which can supply compressed fluid in accordance with a sudden change in an amount of fluid used even when the number of compressors to be installed is increased, and a control device thereof.
    Type: Application
    Filed: February 8, 2013
    Publication date: December 24, 2015
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Zhijia REN, Hironobu TAKAYASU, Yoshiyuki KANEMOTO
  • Control unit for air compressor with graphical user interface
    Patent number: D776675
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: January 17, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiroshi Ohta, Akira Iyozumi, Hiroyuki Matsuda, Takashi Nakajima, Hayato Adachi, Hideharu Tanaka, Kazumasa Kanai, Zhijia Ren