Stoves and furnaces – Stoves – Heating
Patent
1993-09-24
1995-11-28
Yeung, James C.
Stoves and furnaces
Stoves
Heating
126198, 126193, 126 60, F24C 114
Patent
active
054698367
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a heating appliance, particularly a stove, and a means of pre-heating air that is to be consumed in the burning of solid fuel contained within the stove. The heating stove is of the kind having a fire box with an ash-chamber.
BACKGROUND OF THE INVENTION
Wood and solid fuel stoves are used in many places throughout the world. They usually comprise a metal fire-box to contain the solid fuel and the flames produced by the burning of the solid fuel. Access to the fire-box for loading of more fuel, and for cleaning and servicing is by a door in the front (or other) panel of the stove. The solid fuel is supported on a grate that separates the fire-box from the ash-chamber, the grate allowing the burning fuel to be fed by air rising from beneath the grate and allowing spent fuel in the form of ash to fall into the ash-chamber to be collected. The collected ash can be disposed of periodically by removing and emptying a collection pan within the ash-chamber.
Most stoves have some type of regulator to control the supply of air into the fire-box. The regulator may be an adjustable shutter or a wheel.
The combustion efficiency of heating stoves can be impaired by intaking air that is relatively cool. Air may be drawn from the immediate surroundings of the stove or even from outside. The air passes through the air regulator and into the fire-box where it is heated during combustion. The hot exhaust gases that are usually vented through a flue and into a chimney are much hotter than the temperature at which the uncombusted air was supplied to the fire. This results in a loss of energy. The efficiency of heating stoves can be improved by pre-heating the air before it is supplied to the fire-box.
In some stoves the air is supplied from a particular source, for example the supply may come from a conduit installed in the floor of a house leading from outside of the house to the bottom of the stove. It is wasteful to provide conduits during the construction of a house that may not be used (if for example a conventional gas or electrically powered fire is subsequently used). However, if such conduits are not supplied, houses without them would be prevented from using stoves which are designed to take in air through such a system.
SUMMARY OF THE INVENTION
It is an aim of the present invention to alleviate some of the problems discussed above.
According to the invention we provide a heating appliance comprising a fire-box, a separate ash-chamber, grate means between the fire box and the ash chamber, updraught air supply means adapted to provide a supply of updraught air into the fire-box via the ash chamber and the grate means, and pre-heating means adapted to provide a supply of pre-heated combustion air to the fire box, the pre-heating means delivering pre-heated air from a region or passage beneath the ash chamber to an upper region of the fire-box.
The fire box and ash-chamber may be separated by a dividing wall having the grate means therein.
The pre-heating means may have an air intake means below the ash-chamber. The pre-heated air which is supplied to the fire-box at an upper, or top, region of the fire-box may be transported there by air supply means. The air supply means preferably comprises a tube or channel of closed cross-section which preferably extends through the dividing wall. The air supply means may also comprise delivery means which delivers air at the top of the door of the appliance. The delivery means may comprise a passageway extending across the fire-box in the region of the top of the door. The passageway preferably has a delivery slot, which most preferably extends substantially across the width of the door, or at least across a window portion of the door.
Advantageously mixing means is supplied to mix air rising from the fire with the pre-heated air. The mixing means may comprise a guide or deflector, such as a plate, which forces air rising from a fire in the fire-box to pass by the delivery means.
The arrangement of the delivery means and mixi
REFERENCES:
patent: 844292 (1907-02-01), Thurston
patent: 907867 (1908-12-01), Palmer
patent: 2337847 (1943-12-01), Conkell
patent: 4383517 (1983-05-01), Gillis et al.
patent: 4426992 (1984-01-01), Martenson
patent: 4475529 (1984-10-01), Milligan
patent: 4475533 (1984-10-01), Milligan
patent: 4483312 (1984-11-01), Martenson
patent: 4611572 (1986-09-01), Martenson
patent: 4643165 (1987-02-01), Chamberlain
patent: 4658801 (1987-04-01), Black
patent: 4665889 (1987-05-01), Rumens et al.
patent: 4683868 (1987-08-01), Ferguson
patent: 4766876 (1988-08-01), Henry
patent: 4856491 (1989-08-01), Ferguson et al.
patent: 4941451 (1990-07-01), Gilham
Energy King brochure, "Add a Little Warmth to Your Life" (2 pages).
The Stack Manufacturing Company Limited brochure, "Stack High Energy Combustion Stoves Vista 640/Combi 640" (4 pages).
Kent brochure, "The Fires that Burn Twice" (7 pages).
Meridian brochure, "Meridian Wood Burning Heaters" (8 pages).
Charnwood Fireclass brochure, "Fireclass-The Fire in a Class of its Own" (6 pages).
Charnwood Stoves brochure, "Look into the Features & Versatility of a Multi-Fuel Stove" (4 pages).
LandOfFree
Solid fuel heating appliance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solid fuel heating appliance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid fuel heating appliance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2006282