Flat or planar atmospheric gas burner, especially for mimicking a wood fire

Abstract

The atmospheric gas burner for a decorative fire has a mixing chamber ( 1 ) closed on an upper side thereof by a burner mat ( 2 ) providing a flame-bearing surface and a pre-mixing burner gas/air supply system ( 4 ) connected with the mixing chamber ( 1 ) on a bottom side thereof. The pre-mixing burner gas/air supply system has a combustion gas injection nozzle ( 5 ) and at least one opening ( 6 ) for supplying primary air. In order to provide a gas burner which is compact, creates a realistic flame impression with high flames and has a small input gas energy as well as a low pressure drop, a small blower ( 8 ) is arranged in the mixing chamber and has a rotor blade or blades ( 8 ) that rotate substantially horizontally in operation.

1 . An atmospheric gas burner for a decorative fire, said atmospheric burner comprising 
 a mixing chamber ( 1 ) closed on an upper side thereof by a burner mat ( 2 ) providing a flame-bearing surface;    a pre-mixing burner gas/air supply system ( 4 ) connected with the mixing chamber ( 1 ) on a bottom side thereof, said pre-mixing burner gas/air supply system having a combustion gas injection nozzle ( 5 ) and at least one opening ( 6 ) for supplying primary air; and    a small blower ( 8 ) is arranged in the mixing chamber ( 1 ), wherein said small blower ( 8 ) comprises a rotor blade or blades ( 8 ) that rotate substantially horizontally in operation.    
   
   
       2 . The atmospheric gas burner as defined in  claim 1 , wherein the mixing chamber ( 1 ) has an opening ( 3   a ), the pre-mixing burner gas/air supply system ( 4 ) has an outlet opening connected to the opening ( 3   a ) and the small blower ( 8 ) is arranged in the vicinity of the outlet opening.  
   
   
       3 . The atmospheric gas burner as defined in  claim 1 , wherein the small blower ( 8 ) has an electric motor ( 8   b ) acting as drive means for the rotor blade or blades, said electric motor ( 8   b ) is arranged outside of the mixing chamber ( 1 ) and the combustion gas/air supply system ( 4 ), and the electric motor ( 8   b ) has a vertically oriented drive shaft ( 8   c ) guided from outside of the mixing chamber ( 1 ) to an interior of the mixing chamber ( 1 ) via a gas-tight seal ( 9 ).  
   
   
       4 . The atmospheric gas burner as defined in  claim 3 , wherein the electric motor ( 8   b ) is a low-voltage direct current motor.  
   
   
       5 . The atmospheric gas burner as defined in  claim 3 , wherein the electric motor ( 8   b ) is an alternating current motor.  
   
   
       6 . The atmospheric gas burner as defined in  claim 1 , wherein the small blower ( 8 ) is characterized by a capacity in a range from 5 to 20 l/min.  
   
   
       7 . The atmospheric gas burner as defined in  claim 1 , wherein the at least one opening ( 6 ) for supplying primary air is designed so that a primary airflow rate has a value sufficient to produce a yellow flame appearance.  
   
   
       8 . The atmospheric gas burner as defined in  claim 1 , wherein the mixing chamber ( 1 ) does not contain a granulate for varying flame appearance during operation.  
   
   
       9 . The atmospheric gas burner as defined in  claim 1 , wherein the flame-bearing surface is substantially flat or planar.