Abstract: An industrial tunnel oven for heat treatment of parts may include: an outer wall that defines a tunnel; at least one inner wall; and a conveying line, at least partially inside the tunnel, configured to convey the parts along the tunnel. The outer wall may have a substantially cylindrical form above a base zone of the outer wall. The walls may define at least one interspace for hot air entering, leaving, or entering and leaving the oven. The at least one inner wall may extends along sides of the tunnel in an arc so as to define openings for the hot air to flow from the at least one interspace toward the conveying line, from the conveying line toward the at least one interspace, or from the at least one interspace toward the conveying line and from the conveying line toward the at least one interspace.

Abstract: An industrial tunnel oven for heat treatment of parts may include: an outer wall that defines a tunnel; at least one inner wall; and a conveying line, at least partially inside the tunnel, configured to convey the parts along the tunnel. The outer wall may have a substantially cylindrical form above a base zone of the outer wall. The walls may define at least one interspace for hot air entering, leaving, or entering and leaving the oven. The at least one inner wall may extends along sides of the tunnel in an arc so as to define openings for the hot air to flow from the at least one interspace toward, the conveying line, from the conveying line toward the at least one interspace, or from the at least one interspace toward the conveying line and from the conveying line toward the at least one interspace.