US 4,363,785 AGranted

Wood stove having catalytic converter

OwnerAllan C. Willsoninventor

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Abstract

A wood burning stove is formed with double front and rear side walls of heat conductive metal spaced apart by heat conductive spacer fins and providing air passageways by which room air is heated by conduction from the walls which are heated by the burning of wood deposited on a firebox floor supported in heat conducting relationship with the inner side walls. A catalytic converter is disposed over the fire area in the upper portion of the stove, and is arranged to receive preheated fresh secondary air which mixes with hot, incompletely combusted compounds from the fire and, in the presence of the catalyst, induces a secondary combustion of the substances. This mixture is channeled into a heat extraction chamber where the secondary combustion is completed and the resultant heat is transferred to the metal body of the stove. An exhaust passageway is provided for releasing the products of complete combustion into the atmosphere.

Claims11

Dependent claims

A stove for burning solid fuel, comprising:

(a) top, bottom, front, rear and side walls,
(b) a fuel-supporting floor above the bottom wall,
(c) means for providing primary combustion air into the interior of the stove adjacent the fuel-supporting floor,
(d) catalytic converter means supported a spaced distance above the fuel-supporting floor, the converter means having a catalyst coated surface arranged to intercept incomplete combustion products from a fire on the fuel-supporting floor,
(e) means for introducing secondary combustion air to said catalyst coated surface for mixing with said combustion products, comprising an enclosed air chamber supported a spaced distance above the fuel-supporting floor, said catalyst coated surface forming at least a portion of an outside wall of said air chamber,
(f) a heat extraction chamber including the side and top walls of the stove arranged to receive the hot combustion gases passing from the catalytic converter and to transfer the heat from said gases to the side and top walls of the stove, and
(g) a combustion gas exhaust passageway means for communicating the heat extraction chamber with the atmosphere.

4 more elements

A stove for burning solid fuel, comprising:

(a) top, bottom, front, rear and side walls,
(b) a fuel-supporting floor above the bottom wall,
(c) means for providing primary combustion air into the interior of the stove adjacent the fuel-supporting floor,
(d) catalytic converter means supported a spaced distance above the fuel-supporting floor, the converter means having a catalyst coated surface arranged to intercept incomplete combustion products from a fire on the fuel-supporting floor, the converter means comprising at least one substrate plate having a multiplicity of holes therethrough from the coated surface to the opposite side surface,
(e) means for introducing outside air to said opposite surface for passage through said holes to the catalyst coated surface for mixing with said combustion products, said means comprising:
(1) an enclosed air chamber supported a spaced distance above the fuel-supporting floor, said substrate plate forming at least a portion of the bottom side of the air chamber with said opposite side surface exposed to the interior of the chamber, and
(2) means connected to the air chamber for admitting outside air thereto,
(f) a heat extraction chamber including the side and top walls of the stove arranged to receive the hot combustion gases passing from the catalytic converter, and
(g) a combustion gas exhaust passageway means for communicating the heat extraction chamber with the atmosphere.

6 more elements

Dependencies are inferred from the claim text.