US Patent Issued to TRANE INTERNATIONAL on July 8 for "Two-stage compressor having variable speed first stage" (Wisconsin Inventor)

ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,486, issued on July 8, was assigned to TRANE INTERNATIONAL INC. (Davidson, N.C.).

"Two-stage compressor having variable speed first stage" was invented by Matthew Cambio (La Crosse, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compressor driven by a variable-frequency drive (VFD) is provided to supplement operation of another compressor of a heating, ventilation, air conditioning, and refrigeration (HVACR) system, such as heat pump operations at low ambient temperatures. The VFD is controlled to provide efficient pressure ratios for each compressor of the HVACR system when the compressor driven by the VFD is used to supplement the other comp...