Patents by Inventor Xizhi Li

Xizhi Li 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).

  • Drive control method for electronic expansion valve
    Patent number: 10289123
    Abstract: A drive control method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: May 14, 2019
    Assignees: Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd., Hisense USA Corp.
    Inventors: Xizhi Li, Yuping Deng, Xianlin Zhang, Shuliang Huang
  • Drive control device and method for electronic expansion valve
    Patent number: 9851725
    Abstract: A drive control device and method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: December 26, 2017
    Assignees: Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd., Hisense USA CORP
    Inventors: Xizhi Li, Yuping Deng, Xianlin Zhang, Shuliang Huang
  • DRIVE CONTROL METHOD FOR ELECTRONIC EXPANSION VALVE
    Publication number: 20170250629
    Abstract: A drive control method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.
    Type: Application
    Filed: May 16, 2017
    Publication date: August 31, 2017
    Applicants: Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd., HISENSE USA CORP
    Inventors: Xizhi Li, Yuping Deng, Xianlin Zhang, Shuliang Huang
  • Drive Control Device and Method for Electronic Expansion Valve
    Publication number: 20140343735
    Abstract: A drive control device and method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.
    Type: Application
    Filed: June 21, 2012
    Publication date: November 20, 2014
    Applicants: HISENSE USA CORP, Qingdao Hisense Hitachi AIr-Conitioning Systems Co Ltd.
    Inventors: Xizhi Li, Yuping Deng, Xianlin Zhang, Shuliang Huang