A heat exchanger (10) comprising: a first pressure plate (20) and a first energy exchange plate (22) attached to the first pressure plate (20)； a second pressure plate (30) and a second energy exchange plate (32) attached to the second pressure plate (30), the second pressure plate (30) attached to the first pressure plate (20)； and a first separator (40) and a second separator (42) disposed between the first energy exchange plate (22) and the second energy exchange plate (32), characterized by the fact that the first exchange plate of energy (22), the second energy exchange plate (32), the first separator (40) and the second separator (42) define at least one step with controlled temperature (50) for the product to pass through the exchanger of heat (10), wherein at least one of the first energy exchange plate (22) and the second energy exchange plate (32) comprises a conduit (60, 70, 80) through a portion of the first energy exchange plate (22) and / or the second energy exchange plate (32) and further comprising a plate of the first end (100) defining an input and a plate of the second end (110) defining an output , the plate of the first end (100 and the plate of the second end (110) are u nested to the opposite ends of the first pressure plate (20) and the second pressure plate (30).Un intercambiador de calor (10) que comprende: una primera placa de presión (20) y una primera placa de intercambio de energía (22) unida a la primera placa de presión (20)； una segunda placa de presión (30) y una segunda placa de intercambio de energía (32) unida a la segunda placa de presión (30), la segunda placa de presión (30) unida a la primera placa de presión (20)； y un primer separador (40) y un segundo separador (42) dispuestos entre la primera placa de intercambio de energía (22) y la segunda placa de intercambio de energía (32), caracterizado por el hecho de que la primera placa de intercambio de energía (22), la segunda placa de intercambio de energía (32), el primer se
