US 4,493,270 AGranted

Heating unit

OwnerArthur P. Gamrothinventor

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Abstract

An improved heating unit comprises a combustion chamber which includes a fuel-supporting perforated burning platform located a distance from the bottom of the combustion chamber. A perforated air plenum is disposed within the combustion chamber a short distance from the combustion chamber top wall to overly a portion of the burning platform. A blower forces air upwardly through the perforations in the burning platform to facilitate waste material combustion and the blower also forces air downwardly through the plenum perforations against the burning platform to further oxygenate the flames and thereby achieve nearly complete combustion. The pressure of incoming air into the combustion chamber forces the exhaust gases through the air passageway above the plenum and out through an exhaust pipe. A heat exchanger, taking the form of a water jacket, surrounds the combustion chamber to cool the combustion chamber and to recover the heat radiated upon combustion of the waste combustible material.

Claims18

Dependent claims

A heating unit which comprises:

A combustion chamber having an opening therein for admitting fuel into said combustion chamber;
a perforated burning platform disposed within said combustion chamber and spaced apart from the bottom of the combustion chamber for supporting fuel thereon;
first air forcing means carried in part by said combustion chamber for forcing air into the space beneath the burning platform where it flows upwardly through said perforated burning platform to achieve combustion of the fuel supported thereby;
second air forcing means including a perforated plenum which is positioned above the burning platform and spaced apart from the top of the combustion chamber, said second air forcing means being operable to direct air through said perforated plenum and downward against the fuel supported by said burning platform;
an exhaust outlet formed in the top of said combustion chamber and communicating with the space above said perforated plenum for dispelling the gaseous combustion byproducts forced therethrough from the combustion chamber by the pressure of air forced by said first and second air forcing means;
and
a heat exchanger surrounding said combustion chamber for recovering heat.

4 more elements

An improved heating device comprising:

a combustion chamber;
a perforated, burning platform secured within said combustion chamber a distance up from the combustion chamber bottom to create a first air passageway which lies between said burning platform and the bottom of said combustion chamber;
an air-carrying plenum means disposed within said combustion chamber a distance from the top of the combustion chamber to create a second air passageway which lies between said plenum means and the top of said combustion chamber, said air-carrying plenum means having perforations therein opposing said perforations in said burning platform;
an air system for admitting air into said first air passageway and directing it upwardly through said burning platform to enhance combustion of material supported by said burning platform and for admitting air through said plenum means and directing it downward against said burning platform;
an exhaust outlet disposed through the top of said combustion chamber in communication with said second air passageway between said plenum means and the top of the combustion chamber for providing an escape path for combustion bases which are forced into said second air passageway by the pressure of air expelled through said plenum means and said burning platform;
and
a heat exchanger surrounding said combustion chamber.

4 more elements

Dependencies are inferred from the claim text.