ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,970, issued on June 17, was assigned to TYCO FIRE & SECURITY GMBH (Neuhausen am Rheinfall, Switzerland) and York Guangzhou Air Conditioning and Refrigeration Co. Ltd. (Qingyuan, China).
"Heat pump system" was invented by Xiening Qiu (Qingyuan, China), Tianlong Xiao (Qingyuan, China), Lue Lv (Qingyuan, China), Xiaoyan Zhang (Qingyuan, China) and Jingjing Xu (Qingyuan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heat pump system is provided. The heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger and a six-way valve. The compressor comprises a fluid suction port and a fluid discha...