Stoves and furnaces – Liquid heater
Patent
1974-03-25
1976-01-06
Dority, Jr., Carroll B.
Stoves and furnaces
Liquid heater
F24B 700
Patent
active
039304906
ABSTRACT:
A heat exchange device installed in a fireplace without any modification thereto completely encircling the fire, sides, top, back and bottom but without having the heating tubes and ducts exposed to the destructive concentrated heat that occurs at the fire bed level of grate or andiron and including twin cold air ducts extending from front to rear of the fireplace at one lower corner thereof, twin hot air ducts extending from front to rear of the fireplace at the other lower corner thereof with the twin ducts interconnected by a plurality of heat exchange tubes which extend upwardly along the side walls of the fireplace and then horizontally in overlying relation to the fire in the fireplace an additional tubes extending horizontally across the bottom of the fireplace. A motor driven fan is provided in the bottom cold air duct to circulate air through the device. The twin ducts, having interconnecting apertures to the rear, include baffle arrangements to guide the flow of air through the heat exchange tubes for most efficient utilization of the heat from the fire in the fireplace. A forced draft device is incorporated into the cold air duct for selective discharge of air at the base of the fire in the fireplace to facilitate the initial burning of the fuel and to provide a forced draft for proper combustion of the fuel whenever desired. When the fire is first lit, the resulting flames hitting and passing in between and around the overhead heating tubes encircling the fire provide heat almost instantly and as the fire progressively burns, the entire length of the heating tubes, both overhead and encircling the fire on both sides and to the back, become heated providing a continuous expanded volume of hot air which is forced out into the room, away from the fireplace, this air is then circulated and again re-enters the cold air tubes by being forcibly drawn from the floor level and ejected as heated air on the opposite side of the fireplace. This results in an even room temperature, even at floor level. As the fire progressively burns, coals and ashes falling through the apertures in the conventional grate cover the heating tubes extending across the floor of the firepplace thereby extracting heat from this area of the fireplace which becomes heated last, but which also retains heat the longest, long after the fire itself has burned out.
REFERENCES:
patent: 737382 (1903-08-01), Frederick
patent: 1313085 (1919-08-01), Greene
patent: 2052643 (1936-09-01), Modine
Lassy Carl O.
Lassy William A.
Dority Jr. Carroll B.
Jacobson Harvey B.
O#Brien Clarence A.
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