Downdraft boiler with turbulators
AssigneeSlant/Fin Corporation
InventorsGeorge Weintraub, Donald Brown
Life of this patent
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Abstract
A downdraft boiler has a ceramic burner plate overlying a horizontal-tube heat exchanger at least the upper tubes of which each have an internal turbulator preventing premature vaporization of the water traversing the heat exchanger. The turbulator can consist of a twisted metal strip whose edges lie along helices.
Claims12
A downdraft boiler comprising:
- a boiler housing formed with a combustion chamber at a top of said housing and a heat exchanger chamber below said combustion chamber;
- a burner on said housing at the top thereof for combustion of a fuel to produce a flue gas in said combustion chamber;
- a heat exchanger in said heat exchanger chamber below said burner comprising a plurality of horizontal heat exchanger tubes traversable by water and heated by a downflow of said flue gas around said tubes;
- a twisted baffle in at least uppermost tubes of said heat exchanger for limiting overheating of water therein;
- and
- a flue gas outlet on said housing communicating with said heat exchanger chamber below said heat exchanger.
A heat exchanger assembly for water heating comprising a plurality of heat exchanger tubes traversable by water and at least one array of fins through which said tubes extend, and a respective twisted baffle in each of said tubes, an upper array of said fins being traversed by at least one row of upper tubes and a lower array of said fins being traversed by at least one lower row of said tubes.
Dependencies are inferred from the claim text.