ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,316, issued on May 27, was assigned to FUJITSU GENERAL Ltd. (Kanagawa, Japan).
"Air conditioner" was invented by Hiroshi Sasaki (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air conditioner has a refrigerant circuit filled with a predetermined amount of a refrigerant, the circuit being formed of an outdoor unit and an indoor unit connected to each other by refrigerant piping, the outdoor unit having a compressor, an outdoor heat exchanger, and an expansion valve, the indoor unit having an indoor heat exchanger. The conditioner has an estimation model that estimates an amount of remaining refrigerant remaining in the circuit by u...