Patent ID: 7886810

Claim:
An apparatus for exchanging heat having: a) at least one first flow path for a first fluid, which is at least partially delimited by at least one first delimiting element; b) at least one second flow path for a second fluid, which is at least partially delimited by at least one second delimiting element; c) at least one first diffusor space, which is at least partially delimited by at least one third delimiting element and is connected upstream of the first flow path, the first diffusor space being flow-connected to at least one first connection piece, through which a flow of the first fluid enters the first diffusor space; d) at least one second diffusor space, which is at least partially delimited by at least one fourth delimiting element and is connected downstream of the first flow path, the second diffusor space being flow-connected to at least one second connection piece, through which the first fluid flows out of the diffusor space; e) at least one third and one fourth connection piece, which are flow-connected to the second flow path and through which the second fluid is fed to and discharged from the second flow path; f) at least one separating element, which substantially prevents the first fluid from entering the second flow path and/or the second fluid from entering the first flow path; g) the separating element being connected in a sealing manner to the first and second delimiting elements, and the third delimiting element being connected in a sealing manner to the first or second delimiting element and/or the separating element; h) exchange of heat taking place between the first fluid and the second fluid, wherein said flow comprises a direct flow when said flow enters said at least one first diffuser space from said first connection piece before it is diverted by a structure in the apparatus for exchanging heat and an indirect flow after said flow is diverted by the structure in the apparatus for exchanging heat, wherein the sealing connections are cohesive connections, at least the connections in which the material forming the cohesive join is contacted by said direct flow comprising a first connecting material, and connections in which the material which forms the cohesive join is contacted by said indirect flow and not contacted by said direct flow comprising a second connecting material, and the compositions of the first and second connecting materials being different than one another.