US Patent Issued to TYCO FIRE & SECURITY on Sept. 2 for "Energy efficient heat pump with counterflow heat transfer arrangement" (Wisconsin Inventor)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,405,022, issued on Sept. 2, was assigned to TYCO FIRE & SECURITY GMBH (Neuhausen am Rheinfall, Switzerland).

"Energy efficient heat pump with counterflow heat transfer arrangement" was invented by Andrew Leroy Hjortland (Stoughton, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An energy efficient heat pump for a heating, ventilation, and air conditioning (HVAC) system includes a compressor system configured to direct a working fluid along a working fluid circuit of the heat pump. The compressor system includes a first compressor configured to direct the working fluid along a first portion of the working fluid circuit having a first expansion devic...