ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,663, issued on Nov. 11, was assigned to CARRIER Corp. (Palm Beach Gardens, Fla.).

"Heat pump system and control method thereof" was invented by Yilin Zhang (Shanghai) and Weijuan Wang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heat pump system comprises: a compressor having a compressor inlet and a compressor outlet; a change-over valve configured to selectively connect the compressor inlet and the compressor outlet to a first flow path and a second flow path; a heat-source-side heat exchanger on the first flow path; a user-side heat exchanger on the second flow path; a first branch and a second branch between the first flow path and...