ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,742, issued on July 14, was assigned to GUANGDONG MEIZHI PRECISION-MANUFACTURING Co. LTD. (Shunde Foshan, China).
"Air conditioning system" was invented by Yufei Yang (Shunde Foshan, China), Siqing Liao (Shunde Foshan, China) and Yongdong Ou (Shunde Foshan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air conditioning system is provided. The system has a high-pressure pipe, a low-pressure pipe, an indoor heat exchanger, an outdoor heat exchanger, a leak-free thermal expansion valve and a variable capacity compressor. The variable capacity compressor has a shell, a first cylinder and a second cylinder. The shell has a suction port and an e...