Forced convection furnance gas plenum

Details Forced convection furnance gas plenum Forced convection furnance gas plenum

1996-07-18

1998-09-29

Jeffrey, John A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219400, 126 21A, H05K 334, F27B 910

Patent

active

058147896

ABSTRACT:
A forced convection furnace gas plenum having a mixing chamber to provide a heated gas of a more uniform temperature is presented. The plenum includes a heating element for heating gas and an orifice plate for metering the flow of heated gas to product within the furnace. A heater plate having larger apertures than those of the orifice plate is disposed between the heating element and the orifice plate. The apertures in the heater plate are sized to allow heated gas to pass therethrough into the mixing chamber, located between the heater plate and the orifice plate, with minimal pressure loss. The heated gas mixes in the mixing chamber, causing the temperature to become more uniform before the gas exits through the orifice plate to impinge on the product.

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