Tube-bundle heat exchanger comprising assemblies/built-in elements formed of deflection surfaces and directing sections

A bundle heat exchanger for delivering or dissipating heat and simultaneous mixing of a product flow, comprising:

• a bundle of at least two extended heat exchange elements;
• an outer chamber;
• an inlet opening;
• an outlet opening, the inlet and the outlet arranged such that a product flow in the outer chamber is capable of flowing from the inlet opening to the outlet opening;
• at least two fixed assemblies. each comprising a deflection surface at least two windows disposed in each of the deflection surfaces, which lead from an inlet side to an outlet side, and
• for at least one deflection surface, first and second directing sections are attached parallel to the extended heat exchange elements on the inlet side and on the outlet side of the deflection surface, respectively and partial surfaces of each of the deflection surfaces not provided with a window have one or more bores or openings for passage of the heat exchange elements according to spacing thereof in the bundle of heat exchange elements, the first directing section on the inlet side and the second directing section on the outlet side cross one another at an angle of 90°.