Convection/radiation material treatment oven
AssigneeDespatch Industries, Inc.
InventorHans L. Melgaard
Life of this patent
Estimating the term…
Abstract
A material treatment oven having a housing defining an elongated generally vertical oven cavity having open ends for material to enter and exit. The oven is further characterized by having both convective and radiant heat transfer within the oven cavity.
Claims14
A material treatment oven comprising a housing defining an elongated, generally vertical oven cavity having open ends for material to enter and exit the cavity;
- a radiant panel having a surface facing the interior of the oven cavity for radiating heat energy to material passing through the cavity;
- a source of hot gas;
- plenum means for communicating a stream of hot gas from the hot gas source to the reverse side of the panel to heat the same and to return the stream of the hot gas source;
- second plenum means for conveying a second hot gas stream through the oven cavity to contact a workpiece therein, the second plenum means including nozzle means for directing the flow of said second stream, said nozzle means directing the flow of said gas within an upper portion of said generally vertical oven cavity in a generally downward direction;
- and exhaust means for exhausting said second stream of gas from the cavity.
A material treatment oven comprising a housing defining an elongated oven cavity having open ends through which material to be treated enters and exits the cavity;
- a radiant panel having a first radiant surface facing the interior of, and forming a wall of, the oven cavity;
- a source of clean, hot gas;
- first plenum means for delivering hot gas from said source to the other side of the radiant panel means to heat the panel and for recirculatinq said clean gas to the hot gas source, second plenum means for conveying clean, hot gas from said source to the oven cavity;
- and exhaust means for exhausting hot gas from the oven cavity when the hot gas has made a single pass therewithin, said exhaust means including means for preventing return of exhausted hot gas to the hot gas source.
A material treatment oven comprising a housing defining an elongated, vertical oven cavity having open ends through which material to be treated may enter and exit the cavity, a radiant panel having a first radiant surface facing the interior of the oven cavity and forming a wall of the oven cavity, a duct carried adjacent the oven cavity, a wall of which is formed by the radiant panel, the radiant panel sealing the interior of the duct from the interior of the oven cavity, a source of clean, hot gas, first plenum means for delivering a stream of hot gas from said source to said duct to heat the radiant panel and to recirculate said clean gas from the duct to the hot gas source, the source, plenum and duct forming a hot gas loop through which clean, hot gas may be recirculated, second plenum means for conveying a second stream of clean, hot gas to the oven cavity, and exhaust means for exhausting hot gas from the oven cavity and for preventing the exhausted hot gas stream from entering the hot gas loop.
Dependencies are inferred from the claim text.