Heat exchanger plate module, a plate heat exchanger and a process for the production of the plate heat exchanger

A plate heat exchanger comprising a plurality of stacked heat exchanger plate modules, wherein in the stack the modules are arranged such that every second plate is a pressed heat exchanger plate, and every other is a flat plate, wherein each of the flat and pressed heat exchanger plates has two opposite side surfaces, an extension in a longitudinal direction, transversal direction perpendicular to the longitudinal direction and thickness direction of the plate, the flat and pressed heat exchanger plates comprising

• a first longitudinal end portion comprising at least one first fluid port,
• a second longitudinal end portion comprising at least one second fluid port,
• an intermediate heat exchange portion arranged in between the first and second longitudinal end portions, wherein
• the pressed heat exchanger plate further comprises a pressed pattern forming a corrugated pattern with alternating tops and bottoms in the thickness direction of the pressed plate, the pressed pattern comprising:
• in the first and/or second longitudinal end portions, a first fluid channel pattern leading fluid flow into the at least one first fluid port and/or a second fluid channel pattern bypassing the at least one second fluid port,
• in the intermediate heat exchange portion, a third fluid channel pattern in fluid communication with the first fluid channel pattern and/or second fluid channel pattern, and comprising a plurality of longitudinally extending pressed lines configured to form finned discrete fluid channels in the longitudinal direction of the pressed heat exchanger plate, when the pressed heat exchanger plate is attached to the flat plate, each of the longitudinally extending pressed lines being a longitudinally extending sinusoidal-shaped pressed line.

A heat exchanger plate module comprising a pressed heat exchanger plate and a flat plate, the pressed heat exchanger plate and the flat plate having two opposite side surfaces, an extension in a longitudinal direction, transversal direction perpendicular to the longitudinal direction and thickness direction of the plate, wherein the plates have substantially the same outer shape in the longitudinal and transversal direction, each plate in the module comprising:

• a first longitudinal end portion comprising at least one first fluid port,
• a second longitudinal end portion comprising at least one second fluid port,
• an intermediate heat exchange portion arranged in between the first and second longitudinal end portions, the intermediate heat exchange portion being bounded by the first longitudinal end portion, the second longitudinal end portion, and first and second opposite edges of the plate, wherein
• the pressed heat exchanger plate further comprises a pressed corrugated pattern with alternating tops and bottoms in the thickness direction of the pressed plate, the pressed pattern comprising:
• in the first and/or second longitudinal end portions, a first fluid channel pattern leading fluid flow into the at least one first fluid port and/or a second fluid channel pattern bypassing the at least one second fluid port,
• in the intermediate heat exchange portion, a third fluid channel pattern in fluid communication with the first fluid channel pattern and/or a second fluid channel pattern, and comprising a plurality of longitudinally extending pressed lines configured to form discrete fluid channels in the longitudinal direction of the heat exchanger plate module when the pressed heat exchanger plate is attached to the flat plate, each of the longitudinally extending pressed lines being wave- shaped so that the longitudinally extending pressed line includes plural portions in each of which the pressed line extends towards the first edge of the plate and then extends towards the second edge of the plate.