Combustion device for stoves and fireplaces

A combustor, comprising:

• a firebox enclosure having a base wall, a top wall, a front wall, a rear wall, and side walls extending between the base wall and the top wall;
• an opening along one of the walls for enabling fuel to be loaded into the firebox;
• a baffle in the enclosure intermediate the top and base wall and dividing the interior of the enclosure into a lower fuel combustion chamber below the baffle and an upper exhaust chamber above the baffle;
• wherein the baffle includes a free edge forming an exhaust passage adjacent one of the walls of the firebox, the passage openly connecting the fuel combustion chamber and the exhaust chamber;
• an insulator on the baffle for reflecting heat within the firebox into the combustion chamber;
• a discharge formed through one of the walls and opening into the exhaust chamber to discharge exhaust gases therethrough;
• a first air supply means for delivering primary combustion air to the combustion chamber;
• a second air supply distributor for delivering air to support combustion of unburned gases within an area under the baffle, and including a first duct within the firebox leading from an end opening outside the firebox to the second air supply distributor for delivering air heated by combustion within the firebox to the second air supply distributor;
• and a second duct outside the firebox leading from an end opening outside the firebox to the second air supply distributor for delivering air substantially unheated by combustion within the firebox to the second air supply distributor;
• and
• a third air supply means for delivering secondary combustion air into the firebox adjacent the baffle therein to support secondary combustion of unburned gases within an area adjacent the baffle and exhaust passage.

A combustor, comprising:

• a firebox enclosure having a base wall for supporting a fuel bed, a top wall, a front wall, a rear wall, and side walls extending between the base wall and the top wall;
• an opening along one of the walls for enabling fuel to be loaded into the firebox;
• a baffle in the enclosure intermediate the top and base wall and dividing the interior of the enclosure into a lower fuel combustion chamber below the baffle and an upper exhaust chamber above the baffle;
• wherein the baffle includes a free edge forming an exhaust passage adjacent one of the walls of the firebox, the passage openly connecting the fuel combustion chamber and the exhaust chamber;
• an insulator on the baffle for reflecting heat within the firebox into the combustion chamber;
• a discharge formed through one of the walls and opening into the exhaust chamber to discharge exhaust gases therethrough;
• a first air supply means for delivering primary combustion air to the combustion chamber;
• a second air supply distributor for delivering air to support combustion of unburned gases within an area under the baffle;
• a third air supply means for delivering secondary combustion air to the combustion chamber adjacent the baffle therein to support secondary combustion of unburned gases within an area adjacent the baffle and exhaust passage;
• wherein the first air supply means includes a primary air delivery duct means leading from an end open to the atmosphere outside the firebox to an end within the firebox adjacent the rear wall, and oriented to direct primary combustion air substantially horizontally into the firebox above the fuel bed and below the baffle, to avoid direct impingement of primary air against the fuel bed, such that localized combustion of fuel on the fuel bed is avoided.

A combustor, comprising:

• a firebox enclosure having a base wall, a top wall, a front wall, a rear wall, and side walls extending between the base wall and the top wall;
• an opening along one of the walls for enabling fuel to be loaded into the firebox;
• a baffle in the enclosure intermediate the top and base wall and dividing the interior of the enclosure into a lower fuel combustion .infin.chamber below the baffle and an upper exhaust chamber above the baffle;
• wherein the baffle includes a free edge opposite an adjacent one of the firebox walls and forming an exhaust passage openly connecting the fuel combustion chamber and the exhaust chamber;
• an insulator on the baffle for reflecting heat within the firebox into the combustion chamber;
• a discharge formed through one of the walls and opening into the exhaust chamber to discharge exhaust gases therethrough;
• a first air supply means for delivering primary combustion air to the combustion chamber;
• a second air supply distributor for delivering air to support combustion of unburned gases within an ares under the baffle;
• a third air supply means for delivering secondary combustion air to the combustion chamber adjacent the baffle therein to support secondary combustion of unburned gases within an area adjacent the baffle and exhaust passage;
• wherein the third air supply means includes a secondary air distribution duct leading from a selectively controlled intake end outside the firebox to a discharge opening within the firebox;
• and
• wherein the secondary distribution duct includes a secondary discharge hole than is oriented angularly to direct secondary combustion air toward the area between the baffle and said one of the firebox walls.

A combustor, comprising:

• a firebox enclosure having a base wall, a top wall, a front wall, a rear wall, and side walls extending between the base wall and the top wall;
• an opening along one of the walls for enabling fuel to be loaded into the firebox;
• a baffle in the enclosure intermediate the top and base wall and dividing the interior of the enclosure into a lower fuel combustion chamber below the baffle and an upper exhaust chamber above the baffle;
• wherein the baffle includes a free edge forming an exhaust passage with an adjacent one of the firebox walls, the passage openly connecting the fuel combustion chamber and the exhaust chamber;
• an insulator on the baffle for reflecting heat within the firebox into the combustion chamber;
• a discharge formed through one of the walls and opening into the exhaust chamber to discharge exhaust gases therethrough;
• a first air supply means for delivering primary combustion air to the combustion chamber, including a primary air delivery duct means leading from an end open to the atmosphere outside the firebox to an end within the firebox above the fuel bed and below the baffle, to avoid direct impingement of primary air against the fuel bed, whereby localized combustion of fuel on the fuel bed is avoided;
• a second air supply distributor for delivering air to support combustion of unburned gases within an area under the baffle between the free edge thereof and the back wall of the firebox, including three tertiary air supply tubes spaced apart below the baffle, with each including at least one tertiary air delivery opening therein oriented toward the free baffle edge;
• and side tertiary chambers at opposed ends of the three tertiary air supply tubes for supplying air to the three tertiary air supply tubes;
• and
• at least one delivery duct with an end opening outside the firebox and an end opening into side tertiary chambers;
• a third air supply means for delivering secondary combustion air to the combustion chamber adjacent the baffle therein to support secondary combustion of unburned gases within an area adjacent the baffle and exhaust passage, comprising a secondary air distribution duct leading from a selectively controlled intake end outside the firebox to a discharge opening within the firebox;
• and
• wherein the secondary distribution duct discharge opening is situated along said one of the firebox walls opposite to the free baffle edge.

A combustor air supply system, comprising:

• an inclined baffle elevationally defining a lower fuel combustion area below the baffle and an upper exhaust area above the baffle;
• side walls supporting the inclined baffle and including inwardly facing surfaces and oppositely facing outward surfaces;
• wherein the baffle includes a forward free edge;
• an insulator on the baffle for reflecting heat into the combustion area;
• an air supply distributor for delivering air to support combustion of unburned gases within an area under the baffle rearward of the free edge thereof, including tertiary air supply tubes spaced apart below the baffle, with each including at least one tertiary air delivery opening therein facing toward the free edge of the baffle;
• side tertiary chambers on the side walls at opposed ends of the tertiary air supply tubes for supplying air to the tertiary air supply tubes;
• and
• at least one delivery duct with an outer end exposed to the atmosphere to receive air therethrough and extending along the outward surface of an adjacent side wall to an outlet end opening into the side tertiary chambers.