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Portable refrigerant charge meter and method for determining the actual refrigerant charge in HVAC systems

United States Patent

9,726,410
August 8, 2017
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A refrigerant charge meter and a method for determining the actual refrigerant charge in HVAC systems are described. The meter includes means for determining an optimum refrigerant charge from system subcooling and system component parameters. The meter also includes means for determining the ratio of the actual refrigerant charge to the optimum refrigerant charge. Finally, the meter includes means for determining the actual refrigerant charge from the optimum refrigerant charge and the ratio of the actual refrigerant charge to the optimum refrigerant charge.
Gao; Zhiming (Knoxville, TN), Abdelaziz; Omar (Knoxville, TN), LaClair; Tim L. (Oak Ridge, TN)
UT-Battelle, LLC (Oak Ridge, TN)
14/ 828,595
20170051958
August 18, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.