ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,503, issued on Jan. 20, was assigned to ZHEJIANG GEELY HOLDING GROUP Co. LTD. (Hangzhou, China) and ZHEJIANG LIANKONG TECHNOLOGIES Co. LTD. (Ningbo, China).

"Rotation speed control method and system, device, and storage medium" was invented by Lei Hu (Hangzhou, China), Songyong Xia (Hangzhou, China), Yehong Lu (Hangzhou, China), Changlong Li (Hangzhou, China), Yibo Qiang (Hangzhou, China) and Yongfeng Li (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotation speed control method and system, a device, and a storage medium is provided, which is applied to a heat pump system. The heat pump system includes a throttling short tube and...