Patents by Inventor Zhaozhong Ruan

Zhaozhong Ruan 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).

  • Household appliance and apparatus and method for detecting arc fault in the same
    Patent number: 11444443
    Abstract: Disclosed are a household appliance, an apparatus and a method for detecting an arc fault in the household appliance. The apparatus includes: a grid current detecting unit, configured to detect a current from a power grid to the household appliance so as to generate a first current detecting signal; a filter protecting unit, configured to perform an attenuation processing on an arc signal in the power grid; a load current detecting unit, configured to detect an actual running current in a load of the household appliance so as to generate a second current detecting signal; and a control unit connected to the grid current detecting unit and the load current detecting unit respectively, and configured to identify and compare the first current detecting signal and second current detecting signal so as to determine a source of the arc fault.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: September 13, 2022
    Assignees: GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.
    Inventors: Zhiwei Mai, Zhaozhong Ruan, Biying Wang
  • HOUSEHOLD APPLIANCE AND APPARATUS AND METHOD FOR DETECTING ARC FAULT IN THE SAME
    Publication number: 20180191145
    Abstract: Disclosed are a household appliance, an apparatus and a method for detecting an arc fault in the household appliance. The apparatus includes: a grid current detecting unit, configured to detect a current from a power grid to the household appliance so as to generate a first current detecting signal; a filter protecting unit, configured to perform an attenuation processing on an arc signal in the power grid; a load current detecting unit, configured to detect an actual running current in a load of the household appliance so as to generate a second current detecting signal; and a control unit connected to the grid current detecting unit and the load current detecting unit respectively, and configured to identify and compare the first current detecting signal and second current detecting signal so as to determine a source of the arc fault.
    Type: Application
    Filed: February 27, 2018
    Publication date: July 5, 2018
    Inventors: Zhiwei MAI, Zhaozhong RUAN, Biying WANG
  • Portion of a display screen with graphical user interface
    Patent number: D802008
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: November 7, 2017
    Assignee: GD Midea Air-Conditioning Equipment Co., Ltd.
    Inventors: Zhe Zhang, Zhaozhong Ruan, Dongpei Bai