Heating – Work chamber having heating means – Combustion products heat work by contact
Patent
1990-08-27
1991-12-24
Yuen, Henry C.
Heating
Work chamber having heating means
Combustion products heat work by contact
432152, 432250, 432209, 126 21A, F27B 322
Patent
active
050747827
ABSTRACT:
An improved industrial furnace employing a new and unique heat transfer arrangement is disclosed. The furnace is a closed end cylindrical chamber with a circular, concentrically positioned plate dividing one side of the furnace into a fan chamber containing a fan and the other side of the furnace into a heat treat chamber containing the work. The plate has a central under-pressure opening and its outer circular edge is spaced from the cylindrical wall to define an annular space which is non-orificing. Fan rotation in the fan chamber produces an annulus of wind mass swirling at high circumferential speed which axially travels through the non-orificing space towards the closed end of the heat treat chamber at slow speed. Heating elements extend through the non-orificing space into the heat transfer chamber and are constantly impinged by the swirling annulus wind mass to effect good heat transfer therewith. The under-pressure opening causes the heated wind to contact the work before it is drawn into the under-pressure opening for recirculation. An incineration track is provided in the furnace insulation for incinerating the furnace flue products while also heating the wind mass.
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Hoetzl Max
Lingle Thomas M.
Surface Combustion, Inc.
Yuen Henry C.
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