초록 ▼

A forced-air furnace for burning gas or fuel oil or waste oil utilizes relatively few components and effectively heats air for space-heating purposes. The furnace includes a substantially enclosed, elongated housing having an air intake and an air discharge vent and a hollow elongated heat exchanger

A forced-air furnace for burning gas or fuel oil or waste oil utilizes relatively few components and effectively heats air for space-heating purposes. The furnace includes a substantially enclosed, elongated housing having an air intake and an air discharge vent and a hollow elongated heat exchanger/combustion chamber which is supported within so as to extend axially along the housing. The furnace also includes a fuel burner assembly supported at the discharge end of the housing for directing a flame and attending combustion products directly into the heat exchanger so that the inner surface thereof absorbs heat generated thereby and so that no part of the flame impinges upon the heat exchanger. Heat transfer from the combustion products to the heat exchanger is enhanced by a pair of removable platen-like baffles mounted within the heat exchanger. The combustion products are expelled from the heat exchanger through a flue discharge conduit having a section positioned within the heat exchanger, and a fan mounted within the housing routes air from the air intake and across the surfaces of both the heat exchanger flue conduit and the dual function heat exchanger/combustion chamber to the air discharge vent. A removable end cap attached to one end of the heat exchanger and a hinged burner assembly facilitate clean-out of the interior of the heat exchanger.

대표청구항 ▼

A furnace comprising: substantially enclosed housing means having opposite first and second ends, sidewalls extending between said first and second ends, an air intake associated with said first end, and an air discharge vent associated with said second end; means for moving air from said air intake

A furnace comprising: substantially enclosed housing means having opposite first and second ends, sidewalls extending between said first and second ends, an air intake associated with said first end, and an air discharge vent associated with said second end; means for moving air from said air intake to said air discharge vent so that air moved by said air-moving means moves air from said first end to said second end and generally axially along said housing means; a heat exchanger including an elongated hollow body having two opposite ends and defining inner and outer surfaces, one of said hollow body ends providing an outlet end for said body and the other of said hollow body ends providing an inlet end for said body, said heat exchanger being supported within so as to extend axially along said housing means and so that air flowing from said air intake to said air discharge vent passes along the outer surface of the heat exchanger body from said one body end to the other body end; a fuel burner assembly associated with said inlet end of said heat exchanger for directing a flame and attending combustion products directly into the heat exchanger body at said inlet end so that the inner surface of the heat exchanger absorbs heat generated by the flame and combustion products and so that the flame is directed by the fuel burner assembly generally axially of the heat exchanger toward the outlet end thereof; means associated with the heat exchanger for delivering air to the burner assembly for combustion purposes and so that combustion products discharged from said burner assembly move toward and through the outlet end of the heat exchanger; and a flue discharge conduit supported within said housing means adjacent said first end thereof and operatively connected in flow communication with said heat exchanger body at the outlet end thereof so that combustion products moving through the outlet end of said heat exchanger body are routed by said flue discharge conduit out of said housing means; and said inlet end of said heat exchanger body is tapered in shape so that the transverse cross-sectional area of said heat exchanger body increases in size as a path is traced axially through said heat exchanger body toward said outlet end thereof.