US Patent Issued to CARRIER on Oct. 7 for "Power failure detection circuit and control circuit for VRF system" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,438,357, issued on Oct. 7, was assigned to CARRIER Corp. (Palm Beach Gardens, Fla.).

"Power failure detection circuit and control circuit for VRF system" was invented by Xiaojun Guo (Shanghai), Hui Zhai (Shanghai), Jian Ni (Shanghai) and Zehang Yu (Shanghia, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a power failure detection circuit, the circuit comprises: a rectifying circuit for full-wave rectifying an alternating current voltage so as to obtain a first voltage; a switching circuit for converting the first voltage into a periodic voltage pulse; and a judgment circuit for providing an output signal to a fan ...