Lennox Industries Inc.

Elrede F Schneider

Floyd E Cherington

Charles W Adams

A gas furnace of the pulsating combustion type having improved sound reduction means comprising an exhaust decoupler body adapted to receive pulsating exhaust gases from the combustion chamber, the exhaust decoupler body having an opening with a silencer tube fixed therein, the silencer tube having an inlet opening receiving the pulsating exhaust gases from the combustion chamber and the silencer tube extending into the exhaust decoupler body and having an outlet opening in the mid-region of said exhaust decoupler body. Outlet means in the form of slots are provided in the length of the silencer tube within the exhaust decoupler body. The silencer tube cooperates with the exhaust decoupler body to dissipate the energy of the pulsating exhaust gases. Resonator means are coupled to the exhaust pipe which connects the combustion chamber to the silencer tube. The resonator means functions to cancel a portion of the energy of the pulsating exhaust gases before it can actuate the walls of the exhaust decoupler body at their resonant frequency. Further the sound reduction means includes an air decoupler body enclosing the air valve of the pulsating type gas furnace. The air decoupler body includes imperforate outer walls having an air inlet opening therein, a layer of sound insulating material adjacent to the outer wall and with or without an inner perforated wall, depending on the volume of the air decoupler body, the air decoupler body being constructed and arranged to prevent the reverberation of sound therein and the escape of sound energy from the air inlet opening.

Growing community of inventors

Lewisville, TX, United States of America

Elrede F Schneider