Combustion Apparatus

Abstract

A combustion apparatus 1 includes an intermediate member 6 constituted by a premixer 2 and a burner port assembly 3 and an air passage member 5 , the intermediate member 6 being interposed between two air passage members 5 . Fuel gas flows into an opening row part 10 . The opening row part 10 has a number of openings 8 arranged linearly, so that the fuel gas introduced into the row part 10 is uniformly discharged through each of the openings 8 . The fuel gas discharged through the openings 8 of the row part 10 bumps into air at mixing spaces 39 . Fuel gas discharged through slots is homogenous and uniform in flow rate. Fuel gas produces a primary flame in a first combustion part 46 to perform a primary combustion. Unburned combustible components are discharged outside through openings of the first combustion part 46 and produce a secondary flame with air supplied through the distal end portion of the air passage member 5.

1 . A combustion apparatus, comprising:
 at least one premixer adapted to premix therein fuel gas and air and having an opening row part with openings arranged in a row;   at least one air passage member of a wall shape having at least one distal air emission opening at its distal end; and   at least one burner port assembly arranged between two of the air passage members or between the air passage member and another wall,   having a burner port-upstream passage formed between the opening row part and the burner port assembly and a first combustion part formed by a space enclosed by the burner port assembly and the air passage member,   so that the air is supplied to the air passage member, the burner port-upstream passage, and the premixer, and   so that the fuel gas is supplied to the premixer to be premixed with the air within the premixer, and whereupon the resulting air-fuel gas mixture is supplied through the openings of the opening row part into the burner port-upstream passage to be further mixed with air and to be discharged through the burner port assembly into the first combustion part in an oxygen-deficient condition, so as to burn and to further burn upon air supply through the distal air emission opening of the air passage member.   
   
   
       2 . The combustion apparatus as defined in  claim 1 ,
 having a mixing space adjacent to the opening row part within the burner port-upstream passage,   the openings of the opening row part being open toward the mixing space.   
   
   
       3 . The combustion apparatus as defined in  claim 1 ,
 wherein the mixing space extends substantially over full width of the opening row part.   
   
   
       4 . The combustion apparatus as defined in  claim 1 ,
 wherein the air flows in the burner port-upstream passage in a flowing direction and the openings of the opening row part are open in a direction cross to the flowing direction.   
   
   
       5 . The combustion apparatus as defined in  claim 1 ,
 wherein the burner port assembly comprises a burner port-forming part and two side walls and has an opening between the two side walls and on the site opposite to the burner port-forming part,   wherein the opening row part of the premixer is surrounded by the side walls, and   wherein the air is supplied through the opening between the walls.   
   
   
       6 . The combustion apparatus as defined in  claim 1 ,
 wherein the air passage member has a combustion part-facing air emission opening for emitting air therefrom toward the first combustion part.   
   
   
       7 . The combustion apparatus as defined in  claim 6 ,
 wherein the air passage member has an inclined surface, on which the combustion part-facing air emission opening is formed.   
   
   
       8 . The combustion apparatus as defined in  claim 6 ,
 wherein the burner port assembly has a plurality of burner port groups,   the combustion part-facing air emission opening being arranged at a site corresponding to between the burner port groups of the burner port assembly.   
   
   
       9 . The combustion apparatus as defined in  claim 1 ,
 wherein the air passage member has an upstream air emission opening for emitting air and at upstream of a part of the member defining the first combustion part,   the air emitted through the upstream air emission opening flowing toward a side of the burner port assembly.   
   
   
       10 . The combustion apparatus as defined in  claim 1 ,
 wherein the burner port assembly has a central opening and a side opening,
 so that the fuel gas is discharged through the side opening slower than the fuel gas discharged through the central opening, and the air flows in the vicinity of the side opening of the burner port assembly. 
   
   
   
       11 . The combustion apparatus as defined in  claim 1 ,
 wherein the burner port assembly is constituted by a main body and a decompression wall disposed at a side of the main body,   the main body and the decompression wall defining therebetween a gap that has a side opening, and   the main body having an opening, through which a part of the fuel gas flowing in the main body flows into the gap.   
   
   
       12 . The combustion apparatus as defined in  claim 1 , the openings of the opening row part each being of a slot-like shape. 
   
   
       13 . The combustion apparatus as defined in  claim 1 , the opening row part having an inclined surface, on which the openings are formed. 
   
   
       14 . The combustion apparatus as defined in  claim 1 , the opening row part having an inner angle at 180 degrees or less. 
   
   
       15 . The combustion apparatus as defined in  claim 1 , the distal end of the air passage member being of an acute-angled ridge-like shape.