Tunnel for drying fruit and vegetables

A drying tunnel for fruits or vegetables comprising:

• an impulsion and heating chamber;
• and
• a plenum, configured for receiving an outgoing hot air generated in the impulsion and heating chamber,
• wherein the plenum comprises:
• openings, with a cross-section shape selected from the group consisting of circular and oval, arranged in a staggered pattern, located on a lower surface of the plenum, with an opening density between 150 to 300 openings per square meter,
• wherein the openings are configured for expelling a distributed hot air from inside the plenum in a perpendicular way towards a conveyor system, configured for moving fruits and vegetables to be dried,
• wherein the plenum comprises a rectangular cross-section decreasing along a length thereof, as the rectangular cross-section moves away from an inlet of an outgoing hot air from the impulsion and heating chamber, and
• wherein the decreasing rectangular cross-section is configured for maintaining pressure conditions inside and releasing distributed hot air under a same pressure and temperature conditions throughout an entire conveyor system, achieving a uniform flow distribution over all the openings by means of a geometry of the plenum.