Patent ID: 6022213
Filing Date: 2000-02-08
Classification: F23C,F23D,F23M

Abstract:
A gas fired low emission air heater, the heater comprising:a combustion chamber,a venturi block mounted on an inlet end of the combustion chamber, a tapered venturi passage formed in the venturi block having a narrow venturi passage inlet end and a less narrow venturi passage outlet end in fluid communication with the combustion chamber,an air inlet nozzle aligned with said venturi passage and positioned with respect to the venturi passage such that an annular gap is formed between the air inlet nozzle and the narrow venturi passage inlet end,an annular flange formed around said nozzle and having a plurality of openings formed therethrough for directing a gas into the venturi passage through the annular gap formed between the air inlet nozzle and the venturi passage inlet end;a discharge nozzle mounted on a discharge end of the combustion chamber,a metal matt assembly mounted in said combustion chamber, anda spark plug mounted in said combustion chamber for igniting a gas/air mixture prior to discharge of heated air through the discharge nozzle.