Noritz Corporation

Itsuo Nagai

Takashi Akiyama

Norihide Wada

Yasutaka Kuriyama

Ryosuke Umakoshi

Takeshi Wakada

Keigo Fukunishi

Toshio Watanabe

Takashi Hasegawa

Shuji Kameyama

Masahiro Iguchi

Koji Shimomura

Shigeo Sugie

Hidenori Hata

Masaaki Matsuda

Shingo Kimura

Yasuhiko Sato

There is provided a flame hole formation memberwhich is inserted and mounted from above in a third plate memberused to form a central rich-side flame hole row. As the flame hole formation member, a pair of flame hole formation partseach used to form a respective lean-side flame hole roware connected by bridge formation partsat their upper end positions, with a predetermined distance held between the flame hole formation parts. The bridge formation partis fitted from above into an engagement grooveformed in the upper end edge of the third plate member, whereby the pair of the flame hole formation partsare assembled so as to sit astride the upper end edge of the third plate member

Rich-lean combustion burner and combustion apparatus

A rich-lean combustion burner has a supply channel through which a lean-side mixture is supplied to lean-side flame holes; and a supply channel through which a rich-side mixture is supplied to rich-side flame holes. The supply channels are partitioned from each other. A third plate member including a pair of plate parts which are bent to form a V shape at its lower end edge as a fold line is employed to form a central rich-side burner part. A slit part is partitioned and formed between side edges of a pair of first plate members on both longitudinal sides for forming lean-side flame holes on width-wise sides of the central rich-side burner part. With the lower end part in front, the V-shaped third plate member s inserted into the slit part, thereby being interposed between the first plate members.

Rich-lean combustion burner

A row of rich-side flame holes is centrally arranged. Two rows of lean-side flame holes are arranged on both sides of the rich-side flame hole row, respectively. In addition, two rows of rich-side flame holes are arranged on the outsides of the two lean-side flame hole rows, respectively. A lower end part of a central rich-side burner part is projected into a tubular part into which the rich-side mixture is introduced, and communication holes in fluid communication with an inner space are formed in walls on both sides so as to pass completely therethrough in alignment with each other. Each communication hole has a larger diameter than an inner width P and is disposed at a potion situated nearer to the upper of the tubular part and nearer to the front so as to leave, at the rear, a space in which dust p particles are accumulated.

In a rich-lean combustion burner, each of outer rich-side flame holes disposed on both outer sides is supplied with rich-side mixture in the same amount and mixing state as the others. A lower end part of a central rich-side burner part is projected into an interior of a tubular part to which a rich-side mixture is introduced. First communication holes are opened, respectively, in both side walls of the lower end part. A second and a third communication holes in fluid communication with an outer rich-side burner part are opened in a tubular part. The second and the third communication holes are oriented so as to face each other without any obstruction, other than a space, therebetween. Furthermore, a pocket part which is a space part adapted to collect and accumulate dust particles is formed on the downstream side up to a closed end.

Burner

Portion of a burner

A combustion apparatus ( ) with a burner port assembly ( ) comprises an elongated first array of main burner ports ( ) for jetting and burning a fuel gas mixture of a concentration to make main flames. The combustion apparatus ( ) comprises at least one second arrays of auxiliary burner ports ( ) for jetting and burning a further fuel gas mixture of a different concentration to make auxiliary flames, wherein the second arrays of said auxiliary burner ports ( ) extend along the first array of said main burner ports ( ). The burner port assembly ( ) is constructed using inner and outer wall segments ( ) together with outermost wall segments ( ) or bands ( ). One of the bands ( ) faces the corresponding one of said outermost segments ( ) so as to define between them collateral burner ports ( ).

Combustion apparatus

Growing community of inventors

Hyogo, Japan

Itsuo Nagai