US Patent Issued to Heatcraft Refrigeration Products on Nov. 3 for "Quick CO2 warm liquid defrost with additional heat" (Georgia, Texas Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,782,019, issued on Nov. 3, was assigned to Heatcraft Refrigeration Products LLC (Stone Mountain, Ga.).

"Quick CO2 warm liquid defrost with additional heat" was invented by Shitong Zha (Snellville, Ga.) and Ajay Iyengar (Frisco, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A refrigeration system includes a controller, a first evaporator, a second evaporator, one or more compressors, a flash tank, a heat exchanger, and four valves. When the controller determines that the first evaporator should be operated in a defrost mode, it operates the four valves to allow defrost refrigerant to pass from the heat exchanger to the first evaporator. The defrost...