| 摘要 |
An apparatus for heating and controlling the process temperature in a tunne l pasteurizer, in particular for packaged food products, in which the tunnel, provided with a conveyor able to advance the product, is substantially subdivided into a fir st pre-heating area, into a second pasteurization heat treatment area and a third area wher e the product is cooled. The apparatus is provided at least with a heat exchanger comprising a primar y loop and a plurality of secondary loops, each of which is connected to the hydraulic loop of each sub-area. Each secondary loop is further provided with servo-controlled modulating valves which serve as means for controlling the temperature of the water of the sprinkler of each sub-area.
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