US Patent Issued to DAIKIN INDUSTRIES on July 21 for "Refrigeration apparatus" (Japanese Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,327, issued on July 21, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).

"Refrigeration apparatus" was invented by Nobutaka Kabashima (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compressor unit of a refrigerant circuit includes a compressor, an oil separator, an oil return pipe, an oil return valve, and a discharge temperature sensor. A refrigeration apparatus includes a controller. The controller performs a detection operation. The detection operation is an operation of decreasing the opening degree of the oil return valve and detecting whether or not gas refrigerant is flowing through the oil return pipe based on a change ...