Heat exchanger and its manufacturing method

A heat exchanger comprising turbulizers that turbulize a flow of working fluids, as well as inlet and outlet ducts for the working fluids, the heat exchanger comprising:

• packages including the turbulizers that turbulize the flow of the working fluid between two walls inside the packages,
• wherein the walls of each package are connected to each other by a side wall along the perimeter of the package, each package features inlet openings and outlet openings for the working fluids,
• wherein the packages are set together alternately to accommodate the working fluid flowing through the packages,
• wherein the packages are connected to each other via pass-through connectors, where each pass-through connector is fitted, respectively, in the inlet openings and outlet openings for the working fluids,
• wherein each of the pass-through connectors comprises an external portion and an internal portion, and
• wherein the internal portion of each of the pass-through connectors is connected to the walls of the respective package and closes the corresponding inlet/outlet opening, while the external portion of each of the pass-through connectors is connected to the neighboring walls of the neighboring packages and connects the neighboring areas of flow of the same working fluid so that formed between the neighboring packages is a first area for the discharge of the leaking working fluid, and between the internal portion and the external portion of each of the pass-through connectors there is a second area for the discharge of the leaking working fluid, connected to the first areas for the discharge of the leaking working fluid, between the neighboring packages.