Patent ID: 7213348

Claim:
An air heater assembly for a gas dryer, comprising: a combustion chamber having an air inlet and an air outlet for allowing air to flow therethrough for being heated to be passed to clothes to be dried in a drum of the dryer; and a burner for providing a stable flame for heating said air being passed through said combustion chamber, said burner comprising: a mixing tube having an open end for admission of gas fuel thereunto and at least one opening proximate to said open end for admission of air thereunto to allow mixing of air and gas fuel in the mixing tube; a burner head at an end of the mixing tube opposite said open end for allowing mixed gas fuel and air to be discharged therethrough and ignited into a flame, said burner head being of substantially hemispheric shape and having a plurality of discharge openings distributed along the surface thereof for providing a substantially uniform distribution of flames emanating from the surface thereof; and a baffle attached to the burner at the base of the burner head and extending radially outward therefrom an amount sufficient to prevent disruption of combustion of the air gas fuel mixture being discharged from the burner head as a result of secondary air being drawn outside along the length of the mixing tube from the open end thereof toward the burner head.