Atmospheric Burner for Gas Log Fireplace Producing Stage Combustion and Yellow Chemiluminescent Flame

Abstract

An atmospheric burner assembly for a gas log fireplace comprises a mixing chamber adapted to receive gas from a gas supply and mix gas and air therein. The burner assembly also comprises a manifold adapted to receive gas from a gas supply. The burner assembly also has a burner with a first port communicating with the mixing chamber and a second port communicating with the manifold. The second port is adapted to generate a flame pattern that is embedded within the first port. When installed in the fireplace, the burner assembly combusts pure gas at the second port for rich combustion and a mixture of gas and air at the first port for lean combustion, thereby promoting stage combustion at the burner assembly and producing a yellow chemiluminescent flame.

1 . An atmospheric burner assembly for a gas log fireplace comprising:
 a mixing chamber adapted to receive gas from a gas supply and mix gas and air therein;   a receiver adapted to receive gas from a gas supply; and   a burner with a first port communicating with the mixing chamber and a second port communicating with the receiver, the second port being adapted to generate a flame pattern that is embedded with a flame pattern of the first port, wherein when installed in the fireplace, the burner assembly combusts gas at the second port for rich combustion and a mixture of gas and air at the first port for lean combustion, thereby promoting stage combustion at the burner assembly and producing a yellow chemiluminescent flame.   
   
   
       2 . The atmospheric burner assembly of  claim 1 , wherein:
 the first burner port surrounds the second burner port.   
   
   
       3 . The atmospheric burner assembly of  claim 1 , wherein:
 the mixing chamber comprises a generally planar burner plate spaced from a burner assembly bottom support.   
   
   
       4 . The atmospheric burner assembly of  claim 3 , wherein:
 the first burner port comprises slots formed in a pattern in the burner plate.   
   
   
       5 . The atmospheric burner assembly of  claim 4 , wherein:
 the second port burner port comprises an opening in a tube communicating with the receiver arranged within the slot pattern.   
   
   
       6 . The atmospheric burner assembly of  claim 1 , wherein:
 the receiver is disposed in the mixing chamber.   
   
   
       7 . The atmospheric burner assembly of  claim 1 , wherein:
 the receiver is configured to draw between about 5% and 30% of gas supplied to the burner assembly.   
   
   
       8 . A gas log fireplace comprising:
 a gas supply;   a mixing chamber in communication with the gas supply adapted to mix gas and air therein;   a receiver in communication with the gas supply; and   a burner with a first port communicating with the mixing chamber and a second port communicating with the receiver, the second port being adapted to generate a flame pattern that is embedded within a flame pattern generated by the first port, the burner combusting gas at the second port for rich combustion and a mixture of gas and air at the first port for lean combustion, thereby promoting stage combustion and producing a yellow chemiluminescent flame at the burner.   
   
   
       9 . The fireplace of  claim 8 , wherein:
 the first burner port and the second burner port are co-axially aligned.   
   
   
       10 . The fireplace of  claim 8 , wherein:
 the mixing chamber comprises a generally planar burner plate spaced from burner assembly bottom support.   
   
   
       11 . The fireplace of  claim 10 , wherein:
 the first port comprises slots formed in a pattern in the burner plate.   
   
   
       12 . The fireplace of  claim 11 , wherein:
 the second port comprises an opening in a tube communicating with the receiver arranged within the slot pattern.   
   
   
       13 . The fireplace of  claim 8 , wherein:
 the receiver is disposed in the mixing chamber.   
   
   
       14 . The fireplace of  claim 8 , wherein:
 the receiver is configured to draw between about 5% and about 30% of gas supplied to the burner.   
   
   
       15 . The fireplace of  claim 8 , further comprising:
 a valve positioned between the gas supply and the receiver.   
   
   
       16 . The fireplace of  claim 14 , further comprising:
 a user control operatively connected to the valve adapted to selectively control a level of gas flow from the gas supply to the receiver.   
   
   
       17 . The fireplace of  claim 16 , wherein:
 the user control is adapted to supply to the receiver between 0% and about 30% of the gas supplied to the burner.   
   
   
       18 . A gas log fireplace comprising:
 a gas supply;   a burner assembly comprising a generally planar burner plate spaced from a burner bottom support and forming a mixing chamber receiving gas from the gas supply and mixing the gas with air therein, the burner assembly having a manifold disposed in the mixing chamber receiving gas from the gas supply, the burner plate having a plurality of slot patterns formed therein, each slot pattern being spaced from another slot pattern in the burner plate, slots in the slot pattern communicating with the mixing chamber and combusting the mixture of gas and air for lean combustion, the manifold having a plurality of tubes extending therefrom to areas adjacent the slot patterns, the tubes having openings arranged within the slot pattern, the openings of the tubes combusting pure gas for rich combustion, the burner assembly generating stage combustion and producing a yellow chemiluminescent flame.   
   
   
       19 . The fireplace of  claim 18 , wherein:
 the manifold is configured to draw between about 5% and about 30% of gas supplied to the burner assembly.   
   
   
       20 . The fireplace of  claim 18 , further comprising:
 a valve positioned between the gas supply and the manifold.   
   
   
       21 . The fireplace of  claim 20 , further comprising:
 a user control operatively connected to the valve adapted to selectively control a level of gas flow from the gas supply to the manifold.   
   
   
       22 . The fireplace of  claim 21 , wherein:
 the user control is adapted to supply to the manifold between 0% and about 30% of the gas supplied to the burner assembly.