ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,338, issued on Feb. 24, was assigned to KYUNGDONG NAVIEN Co. LTD. (Gyeonggi-do, South Korea).
"Air conditioning system using heat pump and air heating device" was invented by Dong Hwan Kim (Seoul, South Korea) and Kyung Chang Jang (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an air conditioning system. The air conditioning system includes a heat pump provided to heat or cool a circulating refrigerant, an air heating device provided to burn a fuel so as to heat circulating water so that air is heated by the heated water, and an intermediate heat exchanger provided to exchange heat between the refrigerant and the wate...