Patent ID: 6907734

Claim:
A heat exchanger for recovering, with a heat medium flowing through a heat medium passage (W 3 ), the thermal energy of a high temperature fluid flowing through the interior of a fluid passage ( 87 , 88 , 89 ) extending from a heat source ( 24 ), characterized in that the fluid passage ( 87 , 88 , 89 ) is formed by arranging a large number of heat transfer plates ( 83 ) at intervals from each other and partitioning the gaps between adjacent heat transfer plates ( 83 ) using a partition wall ( 86 ) that is formed integrally with the heat transfer plates ( 83 ), and the heat medium passage (W 3 ) is formed from a large number of pipe members ( 90 ) running through the heat transfer plates ( 83 ) and being connected in a zigzag shape.