Patents by Inventor Changlin Sun

Changlin Sun 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).

  • Condenser Pressure Control System and Method
    Publication number: 20180031292
    Abstract: A method of controlling a condenser fan of a heating, ventilating, and air-conditioning (HVAC) system based on a comparison of a refrigerant flow rate to maintain a valve position of an expansion valve. In the method, a controller modulates the condenser fan to maintain the valve position of the expansion valve at a valve position setpoint when the refrigerant flow rate is higher than the critical flow rate. The method also comprises controlling the speed of the condenser fan of the HVAC system to maintain a condensing measurement at a plurality of condensing measurement setpoints when the refrigerant flow rate is higher than the critical flow rate. The method also comprises controlling the speed of the condenser fan to maintain a condensing measurement at a plurality of condensing measurement setpoints when the condensing temperature measurement is higher than an ambient air temperature value plus at or around 5° F.
    Type: Application
    Filed: July 26, 2016
    Publication date: February 1, 2018
    Inventors: Mingsheng Liu, Changlin Sun, Christopher L. Sanders
  • Method for determining evaporator airflow verification
    Patent number: 8024938
    Abstract: A method of providing a field test protocol for determining evaporator airflow verification for existing vapor compression cycle equipment.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: September 27, 2011
    Assignee: Field Diagnostic Services, Inc.
    Inventors: Todd M. Rossi, Keith A. Temple, Changlin Sun
  • Method for evaluating refrigeration cycle performance
    Publication number: 20080196425
    Abstract: The present invention discloses a method for field testing refrigeration cycle equipment to evaluate condenser and evaporator performance.
    Type: Application
    Filed: December 14, 2007
    Publication date: August 21, 2008
    Inventors: Keith A. Temple, Todd M. Rossi, Changlin Sun
  • Method for determining evaporator airflow verification
    Publication number: 20080196421
    Abstract: A method of providing a field test protocol for determining evaporator airflow verification for existing vapor compression cycle equipment.
    Type: Application
    Filed: November 14, 2007
    Publication date: August 21, 2008
    Inventors: Todd M. Rossi, Keith A. Temple, Changlin Sun