Plate heat exchanger with hollowed-out plate(s)

A heat exchanger comprising, superposed longitudinally on one another:

• a plurality of first and second heat-exchange modules in which first and second fluid-circulation systems are formed, for circulating first and second fluids respectively, and
• a plurality of partition plates, each sandwiched between adjacent first and second heat-exchange modules and in contact with the adjacent first and second heat-exchange modules, each partition plate fluidically disconnecting the first and second fluid-circulation systems from one another,
• at least one of the first and second heat-exchange modules comprising:
• a frame plate of constant thickness, comprising an aperture passing through its entire thickness, and
• an insert fully housed in the aperture and of a thickness equal to the thickness of the frame plate, the insert consisting of
• a) a shaped plate consisting of at least one hollowed-out zone passing through the entire thickness of the shaped plate and of a surrounding solid zone of constant thickness, the corresponding fluid-circulation system being formed in the hollowed-out zone and bounded transversely by the surrounding solid zone and longitudinally by the partition plates adjacent to the module,
• or
• b) a stack of shaped plates, at least one of the shaped plates consisting of at least one hollowed-out zone passing through the entire thickness of the shaped plate and of a surrounding solid zone of constant thickness, the corresponding fluid-circulation system being defined by the hollowed-out zones of the stack and bounded transversely by the surrounding solid zones and longitudinally by the partition plates adjacent to the corresponding heat-exchange module.