The condensing core used in the air conditioning system has been gradually replaced by the parallel flow heat exchanger which is thinner, lighter, more material saving, higher heat transfer efficiency, compact structure, higher corrosion resistance and more large-scale and efficient production. In 2012, the company introduced a full set of Japan KYK automatic 46m parallel flow heat exchanger brazing furnace, developed standard wave height 8mm, wave distance 2.8mm window, 3.6mm window, 4.0mm/5.0mm/7.0mm no window and other finning to meet the different dust environment, to achieve the parallel flow heat exchanger self-made.