| 摘要 |
A wood burning furnace includes a combustion enclosure made up of a lower closed generally rectilinear fire box which is defined at an upper portion thereof by a semicylindrical roof dome and a top cylindrical-shape smoke chamber supported on a rearward upright cylindrical smoke conduit and a forward upright smoke conduit, these conduits being supported on the fire box roof dome and open between the smoke chamber and fire box. The combustion enclosure is supported inside of a furnace shell above a fan compartment in that shell. The furnace shell and heating air baffles fastened to it are so constructed as to provide a heating air passage between the combustion enclosure and shell, and a blower in the fan compartment forces air from outside of the shell over the surfaces of the combustion enclosure and out the top of the shell to a location for use of heated air. The configuration of the shell and air baffles on the one hand and of the combustion enclosure on the other is such that there will be a uniform rate of air flow over practically the entire surface of the combustion enclosure and over the entire involved surface of the furnace shell and air baffles to the end that heating and cooling of the combustion enclosure on the one hand and of the involved surfaces of the air baffles and furnace shell on the other will take place at a uniform rate throughout these entities so that no tendency for non-uniform expansion and contraction due to temperature change will result.
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