US Patent Issued to DAIKIN INDUSTRIES on Sept. 1 for "Heat source unit and refrigerant handling method" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,723,791, issued on Sept. 1, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).

"Heat source unit and refrigerant handling method" was invented by Shinsuke Ikawa (Osaka, Japan) and Katsunori Murata (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A first shut-off valve (46) and a second shut-off valve (47) are closed when power supply to a heat source unit (20) is stopped. At least one of the first shut-off valve (46) or the second shut-off valve (47) which corresponds to a stop valve (41, 42) having a first service port (44) is closer to a heat source heat exchanger (22) than the stop valve (41, 42) having the first service port (44) is....