ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,130, issued on March 17, was assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS LTD. (Tokyo).
"Turbo chiller" was invented by Yasushi Hasegawa (Tokyo), Kenji Ueda (Tokyo), Noriyuki Matsukura (Tokyo), Ryosuke Suemitsu (Tokyo) and Shintaro Omura (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A turbo chiller that has an oil-free configuration, which reduces the frequency of maintenance and maintenance-induced release of refrigerant, and can achieve a reduced environmental impact by utilizing the characteristics of the low-pressure refrigerant R1233zd(E) that reaches negative pressure at a saturation temperature of 18deg C. or lower. The tu...