In order to provide a treatment installation for treating workpieces that is of simple construction and enables optimised workpiece treatment, it is proposed that the treatment installation should include a treatment chamber and a conveying device, by means of which the workpieces are suppliable to the treatment chamber, are removable from the treatment chamber, and/or are conveyable through the treatment chamber in a conveying direction.

Embodiments provide a multi-pass kiln with two or more chambers, an entrance and an exit at a proximal end of the kiln, and a reciprocal flow path extending through the kiln from the entrance to the exit. Lumber charges traveling along the reciprocal flow path may travel in a first direction along one side of the heated second chamber before traveling in a substantially opposite second direction along the opposite side of the second chamber. The distal end of the kiln may be substantially sealed, and a pressure differential between the distal end and the proximal end may draw moist heated air from the heated chamber toward the exit and entry to preheat and/or condition lumber charges traveling through the first chamber.

Embodiments provide a multi-pass kiln with two or more chambers, an entrance and an exit at a proximal end of the kiln, and a reciprocal flow path extending through the kiln from the entrance to the exit. Lumber charges traveling along the reciprocal flow path may travel in a first direction along one side of the heated second chamber before traveling in a substantially opposite second direction along the opposite side of the second chamber. The distal end of the kiln may be substantially sealed, and a pressure differential between the distal end and the proximal end may draw moist heated air from the heated chamber toward the exit and entry to preheat and/or condition lumber charges traveling through the first chamber.

A mixing chamber assembly for mixing burner output with kiln return air. A first vertical duct that receives kiln return air from the first return duct when the kiln is operated in a first mode and receives kiln return air from the second return duct when the kiln is operated in a second mode. A second vertical duct in fluid communication with the first vertical duct so that the kiln return air enters the first vertical duct, travels upward, and changes direction to then travel downward in the second vertical duct to pass downward into a dispersion chamber to provide downward movement of the kiln return air. The dispersion chamber having a hot duct discharge to convey burner output laterally above a delay table surface. The downward movement of the kiln return air colliding with the burner output to provide mixing of the kiln return air with the burner output.

Embodiments provide a multi-pass kiln with two or more chambers, an entrance and an exit at a proximal end of the kiln, and a reciprocal flow path extending through the kiln from the entrance to the exit. Lumber charges traveling along the reciprocal flow path may travel in a first direction along one side of the heated second chamber before traveling in a substantially opposite second direction along the opposite side of the second chamber. The distal end of the kiln may be substantially sealed, and a pressure differential between the distal end and the proximal end may draw moist heated air from the heated chamber toward the exit and entry to preheat and/or condition lumber charges traveling through the first chamber.

Embodiments provide a multi-pass kiln with two or more chambers, an entrance and an exit at a proximal end of the kiln, and a reciprocal flow path extending through the kiln from the entrance to the exit. Lumber charges traveling along the reciprocal flow path may travel in a first direction along one side of the heated second chamber before traveling in a substantially opposite second direction along the opposite side of the second chamber. The distal end of the kiln may be substantially sealed, and a pressure differential between the distal end and the proximal end may draw moist heated air from the heated chamber toward the exit and entry to preheat and/or condition lumber charges traveling through the first chamber.

A temperature control device for controlling the temperature of workpieces in particular for drying vehicle bodies, having a housing and a temperature control tunnel accommodated in the housing and having a tunnel floor. A transport system includes a plurality of transport carriages, which can be moved in a transport direction on a rail system, and by means of which the workpieces can be transported through the temperature control tunnel. Each transport carriage has a transport carriage chassis and a securing device for at least one workpiece, which are coupled together by means of a connection device. Each transport carriage carries a separate drive system, so that the transport carriages can be driven and moved independently of one another.

A temperature control device for controlling the temperature of workpieces in particular for drying vehicle bodies, having a housing and a temperature control tunnel accommodated in the housing and having a tunnel floor. A transport system includes a plurality of transport carriages, which can be moved in a transport direction on a rail system, and by means of which the workpieces can be transported through the temperature control tunnel. Each transport carriage has a transport carriage chassis and a securing device for at least one workpiece, which are coupled together by means of a connection device. Each transport carriage carries a separate drive system, so that the transport carriages can be driven and moved independently of one another.

A curing oven provides a structure which is supportive such that structural members extending the axial length of the oven are not necessary. Additionally, the curing oven provides structures which extend transverse to the axial length of the oven but do not extend through the walls of the oven. Thus, conductive heat transfer is limited and reduced.

A single-pass lumber drying kiln having a main drying chamber, a heat source to provide heat to the main drying chamber, a pre-heating chamber connected to a receiving side of the main drying chamber, the pre-heating chamber having a moisture collector and a kiln entrance, a conditioning chamber connect to an exit of the main drying chamber, the conditioning chamber having a moisture delivery system and a kiln exit, and fans arranged adjacent the pre-heating, conditioning, and the main drying chamber, wherein the fans adjacent the main-drying chamber and the conditioning chamber are synchronized together in a first set and the fans adjacent the pre-heating chamber are synchronized opposite.