Pulse combustion apparatus

F - Mech Eng,Light,Heat,Weapons – 24 – H

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158/34

F24H 9/18 (2006.01) F23C 15/00 (2006.01) F24H 1/20 (2006.01)

Patent

CA 1119507

ABSTRACT OF THE DISCLOSURE A pulse combustion heater is described and includes a combustion chamber and at least one exhaust pipe forming a resonant system with a chamber. In one aspect of the invention, the combustion chamber has an internal cavity of flattened spherical shape which causes combustion gases returning to the combustion chamber to flow into said cavity in a double toroidal flow pattern. In another aspect, the apparatus has an exhaust system which includes a primary exhaust pipe of a length selected so that combustion of gases is at least substantially complete before the gases leave the pipe. The pipe terminates at a manifold to which is connected a plurality of heat exchange coils of helical shape from which heat is transferred to a fluid circulated around the coils. According to another aspect of the invention, the heater has a three part housing, upper and lower parts of which are concrete castings and define respectively an air cushion chamber and an exhaust chamber of the heater. A center section forms part of a boiler sub-assembly which isolates the exhaust chamber from the air cushion chamber. In another aspect, a unitary gas cushion chamber sub- assembly is described.

338939

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