US Patent Issued to Tyco Fire & Security on Dec. 23 for "Energy efficient heat pump with control system and compressor injection" (Kansas, Wisconsin Inventors)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,210, issued on Dec. 23, was assigned to Tyco Fire & Security GmbH (Neuhausen am Rheinfall, Switzerland).

"Energy efficient heat pump with control system and compressor injection" was invented by Andrew Leroy Hjortland (Stoughton, Wis.), Jeremy Ryan Smith (Park City, Kan.) and Andrew Michael Boyd (Wichita, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An energy efficient heat pump includes a working fluid circuit configured to circulate a working fluid, where the working fluid circuit includes a compressor, a first heat exchanger, a second heat exchanger, a first expansion device, an economizer, and a reversing valve, where the reversing valve ...