Patents by Inventor Wali Li

Wali 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).

  • Detection and correction of reverse operation of a compressor in a refrigeration system
    Patent number: 8225621
    Abstract: A method and system for detecting and correcting unintended reverse or backward operation of an electric motor driven scroll compressor of a refrigeration system is characterized by monitoring the pressure at a suction side of the compressor during operation of the refrigeration and determining whether the pressure, after a first time interval following startup of the compressor, exceeds and remains in excess of a predetermined upper pressure limit for at least a second time interval. If it does, the compressor is turned off for a third time interval and is then restarted. The foregoing is repeated and if the compressor is turned off a selected number of times because of successive occurrences of high suction side pressures during operation of the refrigeration system in a chilling cycle, an error indication is generated and the refrigeration system is shut down.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: July 24, 2012
    Assignee: IMI Cornelius, Inc.
    Inventors: Vincenzo DiFatta, Daniel D. Prochaska, Sr., Christopher J. Knight, Wali Li, Nikolay V. Popov
  • Detection and correction of reverse operation of a compressor in a refrigeration system
    Publication number: 20090292395
    Abstract: A method and system for detecting and correcting unintended reverse or backward operation of an electric motor driven scroll compressor of a refrigeration system is characterized by monitoring the pressure at a suction side of the compressor during operation of the refrigeration and determining whether the pressure, after a first time interval following startup of the compressor, exceeds and remains in excess of a predetermined upper pressure limit for at least a second time interval. If it does, the compressor is turned off for a third time interval and is then restarted. The foregoing is repeated and if the compressor is turned off a selected number of times because of successive occurrences of high suction side pressures during operation of the refrigeration system in a chilling cycle, an error indication is generated and the refrigeration system is shut down.
    Type: Application
    Filed: May 22, 2009
    Publication date: November 26, 2009
    Inventors: Vincenzo DiFatta, Daniel D. Prochaska, SR., Christopher J. Knight, Wali Li, Nikolay V. Popov