ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,463, issued on Oct. 14, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).
"Valve opening circuit and heat pump device" was invented by Yuuta Iyoshi (Osaka, Japan), Yoshiki Yamanoi (Osaka, Japan) and Kumiko Saeki (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A valve opening circuit mounted on a heat pump device having a valve on a refrigerant circuit includes a DC electric path to which a DC voltage generated from an AC voltage for normal use is applied, a valve drive circuit that opens and closes the valve by using the DC voltage of the DC electric path, a control unit that acquires a control power source voltage based on the DC ...