ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,017, issued on Dec. 2, was assigned to Hill Phoenix Inc. (Conyers, Ga.).
"CO 2 refrigeration system with supercritical subcooling control" was invented by John D. Bittner (Conyers, Ga.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and method for operating a refrigeration system include a heat exchanger configured to remove heat from a refrigerant and discharge the refrigerant into a conduit. A temperature sensor, a pressure sensor, and a pressure control valve are located along the conduit. A controller is configured to determine that the refrigerant leaving the heat exchanger is outside of a subcritical region based on the measured temperat...