Patent ID: 7878797
Filing Date: 2011-02-01
Classification: F23D

Abstract:
1. A burner assembly comprising: (a) a housing having an air inlet and a burner end having an opening; (b) a motor; (c) an impeller mounted in the housing, said impeller being in fluid communication with the air inlet, in mechanical communication with the motor and adapted to direct air from the air inlet towards the burner end of the housing; (d) at least one pre-mix gas injection nozzle mounted in the housing, each of said at least one pre-mix gas injection nozzle having at least one orifice adapted to direct gaseous fuel into the housing; (e) a spin vane comprising at least one spin vane blade, said spin vane being mounted in the burner end of the housing and adapted to direct the flow of air in the burner end; (f) a straightening screen mounted in the housing downstream from the impeller, said straightening screen having a substantially planar upstream side and a substantially planar downstream side and said straightening screen being adapted to produce a uniform air flow velocity in the burner assembly; (g) an igniter mounted in the burner end of the housing, said igniter being adapted to ignite the air and fuel mixture in the burner end of the housing to produce a main flame; and, (h) a diverging conical discharge section located in the burner end, said diverging conical discharge section includes at least one expansion and contraction crease.