Patent ID: 6817406
Filing Date: 2004-11-16
Classification: F25B,F28D,F28F,Y10S

Abstract:
A plate heat exchanger for simultaneously exchanging heat between two sets of fluids having different temperatures, including:a first heat exchange element comprising two first plates facing each other as a set so as to form a sealed inner space therebetween as a passage for a first fluid, wherein a plate surface of each said first plate serves as a heat transfer surface, and a fluid flowing along an outer surface of said first plates is a second fluid; and a second heat exchange element comprising two second plates facing each other as a set so as to form a second sealed inner space as a passage for a third fluid, wherein a plate surface of each said second plate serves as a heat transfer surface, and a fluid flowing along an outer surface of said plate is a fourth fluid; a plurality of said first heat exchange elements and a plurality of said second heat exchange elements are alternately disposed in such a manner that said plate surface of said respective first and second plates are opposed to each other and a predetermined gap is formed therebetween; baffles interposed between adjacent heat exchange elements and being operative to direct said second and fourth fluid toward the respective heat exchange elements; and a first communication pipe communicating with said inner spaces of said first heat exchange elements and a second communication pipe communicating with said inner spaces of said second heat exchange elements are formed, as a part of said plate in each said element, on said plate surfaces of said first and second heat exchange elements and formed integrally with said elements; and said first and second heat exchange elements having corresponding shapes and being alternately disposed symmetrically in opposite directions.