초록 ▼

An improved inshot gas burner for use in gas furnaces, clothes dryers and other like gas appliances providing improved combustion flame characteristics. A novel burner body design is tuned at manufacture solely by the insertion therein of a flame retention device which has been configured, sized and

An improved inshot gas burner for use in gas furnaces, clothes dryers and other like gas appliances providing improved combustion flame characteristics. A novel burner body design is tuned at manufacture solely by the insertion therein of a flame retention device which has been configured, sized and shaped for the aerodynamic features thereof which will produce proper flame retention and burner fuel loading for the air flow characteristics of the particular appliance model in which the burner will be used. The gas burner is provided with an outwardly flared outlet port downstream of the flame retention device continuous with an outwardly flared diametrically opposed flame carry-over ports. These flared port constructions have produced superior flame characteristics, particularly when used in high-efficiency, forced draft furnaces.

대표청구항 ▼

A gas burner for a forced draft gas appliance comprising: an elongated body defining within a longitudinal passageway therethrough and having an inlet opening at one end for the introduction of a pressurized stream of combustible gas and aspirated primary air, and an outlet opening at the other end

A gas burner for a forced draft gas appliance comprising: an elongated body defining within a longitudinal passageway therethrough and having an inlet opening at one end for the introduction of a pressurized stream of combustible gas and aspirated primary air, and an outlet opening at the other end for the retention of a combustion flame; said passageway including a throat portion, downstream of said inlet opening, having a cross-sectional area less than the cross-sectional area of said inlet opening to produce a venturi; said passageway including an expansion and mixing portion, downstream of said throat portion, having a gradually increasing cross-sectional area toward said outlet opening; said passageway including a flame retention device chamber portion, downstream of said expansion and mixing portions; a flame retention device in said flame retention device chamber portion, and means for maintaining said retention device in said chamber; said passageway including, downstream of said flame retention device chamber portion, an outwardly flared portion flared away from the longitudinal axis of said body, such that a stream of forced draft secondary air moving longitudinally along the exterior of said body may be deflected by said flared portion in a direction away from the longitudinal axis of said body; said passageway communicates with two diametrically opposed carry-over ports extending radially outwardly from the longitudinal axis of said passageway; said carry-over ports being flared outwardly away from the interior thereof along the downstream ends thereof; and said carry-over ports being flared outwardly in substantially the same direction as said flared portion of said passageway such that a stream of forced draft secondary air moving parallel to the longitudinal axis of said body along the exterior of said body may be deflected by the flare of said carry-over ports.