ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,285, issued on June 10, was assigned to PHC HOLDINGS Corp. (Tokyo).
"Binary refrigeration apparatus" was invented by Takashi Toyooka (Saitama, Japan) and Minoru Suto (Gunma, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a binary refrigeration apparatus including: a low-temperature side refrigeration circuit including a spiral heat exchanger including a main tube and a spiral tube wound around the main tube in a spiral form, the main tube being a tube where a low-temperature side refrigerant that flows into a low-temperature side compressor enters, the spiral tube being a tube where the low-temperature side refrigerant flown out fr...