JP3210821B2 - Burner - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、バーナに関し、詳しく
は、空気過剰率の高い淡燃焼を行って燃焼温度を低くす
ることにより、窒素酸化物（以下、ＮＯｘと称する）の
発生量を抑制した低ＮＯｘバーナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner, and more particularly to a burner having a high excess air ratio to reduce the combustion temperature, thereby suppressing the generation of nitrogen oxides (hereinafter referred to as NOx). Low NOx burners.

【０００２】[0002]

【従来の技術】かかるバーナにおいては、空気過剰率の
高い淡燃焼は、それ単独では安定的に行わせることがで
きないので、単独で安定燃焼させることができる空気過
剰率の低い濃燃焼を行わせて、その濃燃焼による燃焼炎
を保炎として淡燃焼を安定的に行わせるようにしてい
る。従来、濃燃焼と淡燃焼を、同一の燃焼面形成用壁面
において互い違いに行うように構成したバーナがあっ
た。しかしながら、このようなバーナでは、互いに噴出
速度、噴出量等が異なる濃燃焼用の混合ガスと淡燃焼用
の混合ガスとが同じ燃焼面形成用壁面において互い違い
の位置から吐出されるので、それら濃燃焼用の混合ガス
と淡燃焼用の混合ガスが互いに干渉し合って乱流が発生
するため、又、濃燃焼用の混合ガスによる燃焼炎と淡燃
焼用の混合ガスによる燃焼炎とが同じ燃焼面形成用壁面
において互い違いの位置に形成されるので、それら燃焼
炎同士が互いに干渉し合って振動するため、燃焼音が大
きいという問題があった。2. Description of the Related Art In such a burner, since lean combustion with a high excess air ratio cannot be stably performed by itself, rich combustion with a low excess air ratio which can be stably burned alone is performed. Thus, light combustion is stably performed using the combustion flame of the rich combustion as flame holding. Conventionally, there has been a burner configured to alternately perform rich combustion and light combustion on the same combustion surface forming wall surface. However, in such a burner, the mixed gas for rich combustion and the mixed gas for light combustion having different ejection speeds and ejection amounts are discharged from alternate positions on the same combustion surface forming wall surface. Since the mixed gas for combustion and the mixed gas for light combustion interfere with each other to generate turbulence, the combustion flame of the mixed gas for rich combustion and the combustion flame for the mixed gas for light combustion are the same. Since the combustion flames are formed at alternate positions on the surface forming wall surface, the combustion flames interfere with each other and vibrate, so that there is a problem that the combustion noise is large.

【０００３】そこで、かかる問題を解決するため、本発
明の発明者は、先の出願（特願平６−１１３２７４号）
にて、図８及び図９に示す如きバーナを提案した。以
下、図８及び図９に基づいて、先の出願にて提案したバ
ーナについて説明する。互いに対向する一対の外装壁体
４１の間に、一対の燃焼部Ｂを並置し、それら一対の燃
焼部Ｂの夫々に、濃燃焼用壁体４２と淡燃焼用壁体４３
とを、それらの間に燃焼空間Ｓを形成するように対向並
置させた状態で、且つ、濃燃焼用壁体４２を外装壁体４
１側に位置させた状態で配置している。又、淡燃焼用壁
体４３の燃焼空間Ｓに対向する面を淡燃焼用壁面４３Ｓ
とするように構成し、且つ、淡燃焼用壁体４３の燃焼ガ
ス流動方向Ｆの下手側端縁を、燃焼ガス流動方向Ｆにお
いて、外装壁体４１の燃焼ガス流動方向Ｆの下手側端縁
と同じ位置に配置し、濃燃焼用壁体４２の燃焼空間Ｓに
対向する面を濃燃焼用壁面４２Ｓとし、且つ、濃燃焼用
壁体４２の燃焼ガス流動方向Ｆの下手側端縁を、燃焼ガ
ス流動方向Ｆにおいて、外装壁体４１の燃焼ガス流動方
向Ｆの下手側端縁よりも燃焼ガス流動方向上手側の位置
に配置している。又、濃燃焼用壁面４２Ｓに付着する燃
焼炎を形成する状態で空気過剰率の低い濃燃焼を行うよ
うに、燃料ガス及び燃焼用空気を吐出する濃燃焼用吐出
手段Ｆｃと、濃燃焼用壁面４２Ｓに付着して燃焼する燃
焼炎を保炎として淡燃焼用壁面４３Ｓに付着する燃焼炎
を形成する状態で空気過剰率の高い淡燃焼を行うよう
に、燃料ガス及び燃焼用空気を吐出する淡燃焼用吐出手
段Ｆｒとを設けている。[0003] In order to solve such a problem, the inventor of the present invention proposes a prior application (Japanese Patent Application No. Hei 6-113274).
Proposed a burner as shown in FIGS. Hereinafter, the burner proposed in the earlier application will be described with reference to FIGS. 8 and 9. A pair of combustion parts B are juxtaposed between a pair of exterior wall bodies 41 facing each other, and a rich combustion wall body 42 and a light combustion wall body 43 are provided on each of the pair of combustion parts B.
Are arranged side by side so as to form a combustion space S therebetween, and the rich combustion wall 42 is
It is arranged in a state where it is located on one side. Also, the surface of the light burning wall 43 facing the combustion space S is the light burning wall surface 43S.
And the lower edge of the lean combustion wall 43 in the combustion gas flow direction F is defined as the lower edge of the exterior wall 41 in the combustion gas flow direction F in the combustion gas flow direction F. And the surface of the rich combustion wall 42 facing the combustion space S is defined as the rich combustion wall 42S, and the lower edge of the rich combustion wall 42 in the combustion gas flow direction F is In the combustion gas flow direction F, the outer wall 41 is disposed at a position on the upper side in the combustion gas flow direction from the lower edge of the combustion gas flow direction F. A rich combustion discharge means Fc for discharging fuel gas and combustion air so as to perform rich combustion with a low excess air ratio in a state where a combustion flame adhered to the rich combustion wall surface 42S is formed; The fuel gas and the combustion air are discharged such that the combustion flame adhering to and burning on the 42S is maintained as a flame holding and the combustion flame adhering to the wall surface 43S for the light combustion is formed to perform the light combustion with a high excess air ratio. A combustion discharging means Fr is provided.

【０００４】濃燃焼用吐出手段Ｆｃは、具体的には、濃
燃焼用壁体４２の燃焼ガス流動方向Ｆの上手側端縁に間
隔を隔てて並設されて、燃料ガスと燃焼用空気との混合
ガスを濃燃焼用壁面４２Ｓに沿わせて吐出する複数個の
濃燃焼用炎口４４と、隣接する濃燃焼用炎口４４の間に
対応する位置から濃燃焼用炎口４４からの混合ガス吐出
方向に延びるスリット状に濃燃焼用壁体４２に形成され
て、濃燃焼用二次空気を燃焼空間Ｓに向けて吐出する濃
燃焼用二次空気吐出口４５を備えて構成している。又、
淡燃焼用吐出手段Ｆｒは、具体的には、濃燃焼用二次空
気吐出口４５と同方向に延びるスリット状に、且つ、濃
燃焼用炎口４４の並設方向に間隔を隔てた状態で淡燃焼
用壁体４３に形成されて、燃料ガスと燃焼用空気との混
合ガスを燃焼空間Ｓに向けて吐出する複数個の淡燃焼用
炎口４６を備えて構成している。[0004] Specifically, the rich combustion discharge means Fc is juxtaposed at a distance from the upper edge of the rich combustion wall 42 in the direction of flow of the combustion gas F and is spaced apart from the fuel gas and the combustion air. And a plurality of rich combustion flame ports 44 for discharging the mixed gas along the rich combustion wall surface 42S, and mixing from the rich combustion flame ports 44 at positions corresponding to the positions between the adjacent rich combustion flame ports 44. A rich combustion secondary air discharge port 45 formed in the rich combustion wall 42 in a slit shape extending in the gas discharge direction and discharging the rich combustion secondary air toward the combustion space S is provided. . or,
The light-combustion discharge means Fr is, for example, in the form of a slit extending in the same direction as the rich-combustion secondary air discharge port 45 and spaced apart in the direction in which the rich-combustion flame ports 44 are juxtaposed. A plurality of light combustion flame ports 46 are formed on the light combustion wall 43 and discharge a mixed gas of fuel gas and combustion air toward the combustion space S.

【０００５】つまり、濃燃焼と淡燃焼とを、夫々異なる
壁面にて、夫々面状態で互いに対向する状態で行わせ
て、濃燃焼の燃焼炎による淡燃焼に対する保炎効果を効
果的に作用させて、淡燃焼を安定的に行ってＮＯｘの発
生量を低減しながら、濃燃焼による燃焼炎と淡燃焼によ
る燃焼炎との干渉を抑制するとともに、濃燃焼用の混合
ガスと淡燃焼用の混合ガスとの干渉を抑制して、燃焼音
の低減を図ることができる。That is, the rich combustion and the light combustion are performed on different wall surfaces in a state where they face each other in a plane state, so that the flame holding effect against the light combustion by the combustion flame of the rich combustion is effectively exerted. In addition, while performing lean combustion stably to reduce the amount of NOx generated, the interference between the combustion flame due to rich combustion and the combustion flame due to lean combustion is suppressed, and the mixed gas for rich combustion and the mixture for lean combustion are mixed. Combustion noise can be reduced by suppressing interference with gas.

【０００６】ところで、かかるバーナでは、ＮＯｘの発
生量が少ない淡燃焼の燃焼量を多くして全体のＮＯｘの
発生量を低減するため、濃燃焼用壁面４２Ｓの面積を淡
燃焼用壁面４３Ｓの面積よりも狭くしている。そして、
濃燃焼の保炎作用を効果的に作用させるため、濃燃焼用
壁体４２と淡燃焼用壁体４３との相対配置関係において
は、燃焼ガス流動方向Ｆにおいて、濃燃焼用壁体４２の
燃焼ガス流動方向Ｆの下手側端縁を淡燃焼用壁体４３の
燃焼ガス流動方向Ｆの下手側端縁よりも燃焼ガス流動方
向上手側に配置して、濃燃焼用壁面４２Ｓを淡燃焼用壁
面４３Ｓにおける燃焼ガス流動方向Ｆの上手側部分に対
向させるようにしている。上述のような濃燃焼用壁体４
２と淡燃焼用壁体４３との相対配置関係では、淡燃焼用
壁体４３の燃焼ガス流動方向Ｆの下手側部分は濃燃焼用
壁体４２と対向しない状態となる。濃燃焼用壁体４２と
対向しない状態の、淡燃焼用壁体４３の燃焼ガス流動方
向Ｆの下手側部分の前方が、外部に開放された状態とな
ると、淡燃焼用壁面４３Ｓの全面において、淡燃焼を安
定的に行わせることができない。そこで、燃焼ガス流動
方向Ｆにおいて、外装壁体４１の燃焼ガス流動方向Ｆの
下手側端縁を、濃燃焼用壁体４２の燃焼ガス流動方向Ｆ
の下手側端縁よりも燃焼ガス流動方向下手側となる、淡
燃焼用壁体４３の燃焼ガス流動方向Ｆの下手側端縁と同
じ位置に配置して、淡燃焼用壁体４３の燃焼ガス流動方
向Ｆの下手側部分を外装壁体４１に対向させて、淡燃焼
用壁面４３Ｓの全面において、淡燃焼を安定的に行わせ
るようにしていた。In this burner, the area of the rich combustion wall surface 42S is reduced by the area of the lean combustion wall surface 43S in order to reduce the overall NOx generation amount by increasing the amount of light combustion in which the NOx generation amount is small. Narrower than. And
In order to make the flame holding action of the rich combustion effective, the relative arrangement relationship between the rich combustion wall 42 and the light combustion wall 43 indicates that the combustion of the rich combustion wall 42 in the combustion gas flow direction F is performed. The lower edge of the gas flow direction F is disposed on the upper side of the combustion gas flow direction of the light combustion wall F in the combustion gas flow direction of the light combustion wall body 43, so that the rich combustion wall surface 42S is a light combustion wall surface. 43S, so as to face the upper portion of the combustion gas flow direction F. Rich combustion wall 4 as described above
In the relative arrangement relationship between 2 and the light combustion wall 43, the lower portion of the light combustion wall 43 in the combustion gas flow direction F does not face the rich combustion wall 42. When the front of the lower side portion of the combustion gas flow direction F of the light combustion wall 43 that is not opposed to the rich combustion wall 42 is open to the outside, the entire surface of the light combustion wall 43S is Light combustion cannot be performed stably. Therefore, in the combustion gas flow direction F, the lower edge of the exterior wall body 41 in the combustion gas flow direction F is connected to the combustion gas flow direction F in the rich combustion wall body 42.
Is arranged at the same position as the lower edge of the combustion gas flow direction F of the lean combustion wall 43, which is on the lower side in the combustion gas flow direction than the lower edge of the combustion gas of the light combustion wall 43. The lower side portion of the flow direction F is opposed to the exterior wall body 41 so that light combustion is stably performed on the entire surface of the light combustion wall surface 43S.

【０００７】[0007]

【発明が解決しようとする課題】しかしながら、前述の
先の出願にて提案したバーナでは、外装壁体４１におけ
る淡燃焼用壁体４３に対向する部分は、淡燃焼の燃焼炎
に曝されるので、過熱される虞があり、改善の余地があ
った。ちなみに、外装壁体４１の過熱を防止するため
に、先の出願にて提案したバーナでは、外装壁体４１と
濃燃焼用壁体４２の燃焼ガス流動方向Ｆの下手側端縁と
の間に冷却用空気通路４７を設けて、濃燃焼用二次空気
吐出口４５から吐出する燃焼用空気の一部をこの冷却用
空気通路４７を通じて燃焼空間Ｓに吐出して、外装壁体
４１を冷却するように構成していた。しかし、冷却用空
気通路４７を設けたとしても、外装壁体４１における淡
燃焼用壁体４３に対向する部分は、やはり、淡燃焼の燃
焼炎に曝される状態であるので、外装壁体４１の過熱を
ある程度は抑制することができるものの確実に防止する
ことができず、外装壁体４１の耐久性の面で問題があっ
た。However, in the burner proposed in the above-mentioned prior application, the portion of the exterior wall 41 facing the light combustion wall 43 is exposed to the combustion flame of light combustion. There is a risk of overheating and there is room for improvement. By the way, in order to prevent overheating of the exterior wall 41, in the burner proposed in the earlier application, between the exterior wall 41 and the lower edge of the combustion gas flow direction F of the rich combustion wall 42. The cooling air passage 47 is provided, and a part of the combustion air discharged from the rich combustion secondary air discharge port 45 is discharged to the combustion space S through the cooling air passage 47 to cool the exterior wall body 41. Was configured as follows. However, even if the cooling air passage 47 is provided, the portion of the exterior wall 41 facing the light combustion wall 43 is still exposed to the combustion flame of the light combustion, so that the exterior wall 41 is exposed. Can be suppressed to some extent, but cannot be reliably prevented, and there is a problem in the durability of the exterior wall body 41.

【０００８】本発明は、かかる実情に鑑みてなされたも
のであり、その目的は、ＮＯｘの発生量を少なく、燃焼
音を小さくしながらも、外装壁体の過熱を確実に防止す
ることにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to reliably prevent overheating of an exterior wall while reducing the amount of NOx generated and reducing combustion noise. .

【０００９】[0009]

【課題を解決するための手段】本発明によるバーナの第
１の特徴構成は、互いに対向する一対の外装壁体の間
に、一対の燃焼部が並置され、前記一対の燃焼部の夫々
に、濃燃焼用壁体と淡燃焼用壁体とが、それらの間に燃
焼空間を形成するように対向並置させた状態で、且つ、
前記淡燃焼用壁体を前記外装壁体側に位置させた状態で
配置され、前記淡燃焼用壁体の前記燃焼空間に対向する
面が、淡燃焼用壁面として構成され、且つ、前記淡燃焼
用壁体の燃焼ガス流動方向の下手側端縁が、燃焼ガス流
動方向において、前記外装壁体の燃焼ガス流動方向の下
手側端縁と同じ位置又は略同じ位置に配置され、前記濃
燃焼用壁体の前記燃焼空間に対向する面が、濃燃焼用壁
面として構成され、且つ、前記濃燃焼用壁体の燃焼ガス
流動方向の下手側端縁が、燃焼ガス流動方向において、
前記外装壁体の燃焼ガス流動方向の下手側端縁よりも燃
焼ガス流動方向上手側の位置に配置され、前記濃燃焼用
壁面に付着する燃焼炎を形成する状態で空気過剰率の低
い濃燃焼を行うように、燃料ガス及び燃焼用空気を吐出
する濃燃焼用吐出手段と、前記濃燃焼用壁面に付着して
燃焼する燃焼炎を保炎として前記淡燃焼用壁面に付着す
る燃焼炎を形成する状態で空気過剰率の高い淡燃焼を行
うように、燃料ガス及び燃焼用空気を吐出する淡燃焼用
吐出手段とが設けられている点にある。According to a first feature of a burner according to the present invention, a pair of combustion sections are juxtaposed between a pair of exterior wall bodies facing each other, and each of the pair of combustion sections includes: In a state where the rich combustion wall body and the light combustion wall body are juxtaposed to face each other so as to form a combustion space therebetween, and
The light-burning wall is disposed in a state where the light-burning wall is positioned on the exterior wall side, and a surface of the light-burning wall facing the combustion space is configured as a light-burning wall, and The lower edge of the wall in the combustion gas flow direction is disposed at the same position or substantially the same position as the lower edge of the exterior wall in the combustion gas flow direction in the combustion gas flow direction, and the rich combustion wall is provided. The surface of the body facing the combustion space is configured as a rich combustion wall surface, and the lower edge of the rich combustion wall in the combustion gas flow direction is in the combustion gas flow direction.
Rich combustion having a low excess air ratio in a state in which a combustion flame attached to the rich combustion wall is formed at a position on the upper side in the combustion gas flow direction from the lower edge of the outer wall body in the combustion gas flow direction. A discharge means for rich combustion that discharges fuel gas and combustion air, and a combustion flame that adheres to the light combustion wall surface with the combustion flame that adheres and burns to the rich combustion wall surface. And a discharge means for light combustion for discharging fuel gas and combustion air so as to perform light combustion with a high excess air ratio in such a state.

【００１０】第２の特徴構成は、前記濃燃焼用吐出手段
は、前記濃燃焼用壁体の燃焼ガス流動方向の上手側端縁
に間隔を隔てて並設されて、燃料ガスと燃焼用空気との
混合ガスを前記濃燃焼用壁面に沿わせて吐出する複数個
の濃燃焼用炎口と、隣接する前記濃燃焼用炎口の間に対
応する位置から前記濃燃焼用炎口からの混合ガス吐出方
向に延びるスリット状に前記濃燃焼用壁体に形成され
て、濃燃焼用二次空気を前記燃焼空間に向けて吐出する
濃燃焼用二次空気吐出口を備えて構成され、前記淡燃焼
用吐出手段は、前記濃燃焼用二次空気吐出口と同方向に
延びるスリット状に、且つ、前記濃燃焼用炎口の並設方
向に間隔を隔てた状態で前記淡燃焼用壁体に形成され
て、燃料ガスと燃焼用空気との混合ガスを前記燃焼空間
内に向けて吐出する複数個の淡燃焼用炎口を備えて構成
されている点にある。A second characteristic configuration is that the rich-combustion discharge means is arranged side by side at a distance from an upper edge of the rich-combustion wall in a direction in which the combustion gas flows, and is provided with a fuel gas and a combustion air. And a plurality of rich combustion flame outlets for discharging the mixed gas along the rich combustion wall, and mixing from the rich combustion flame from a position corresponding to a position between the adjacent rich combustion flames. The rich combustion wall is formed on the rich combustion wall in a slit shape extending in a gas discharge direction, and is configured to include a rich combustion secondary air discharge port for discharging the rich combustion secondary air toward the combustion space. The discharge means for combustion is formed in a slit shape extending in the same direction as the secondary air discharge port for rich combustion, and is spaced from the light combustion wall in the direction in which the rich combustion flame ports are arranged. A composite for discharging a mixed gas of fuel gas and combustion air into the combustion space is formed. In that it is configured with a number of light combustion flame hole.

【００１１】第３の特徴構成は、前記一対の燃焼部の夫
々に設けられた前記濃燃焼用壁体の間を区画する仕切り
壁体が、前記濃燃焼用壁体の燃焼ガス流動方向の上手側
端縁及び前記淡燃焼用壁体の燃焼ガス流動方向の上手側
端縁よりも燃焼ガス流動方向上手側へ延びる状態で設け
られ、その仕切り壁体と前記外装壁体との間を区画する
隔壁体が、前記濃燃焼用壁体の燃焼ガス流動方向の上手
側端縁又は前記淡燃焼用壁体の燃焼ガス流動方向の上手
側端縁から、燃焼ガス流動方向上手側へ延びる状態で設
けられ、前記外装壁体と前記隔壁体との間を、前記淡燃
焼用炎口に混合ガスを送る淡燃焼用混合ガス流路とし、
且つ、前記隔壁体と前記仕切り壁体との間を、前記濃燃
焼用二次空気吐出口に濃燃焼用二次空気を送る濃燃焼用
二次空気流路とするように構成され、前記淡燃焼用混合
ガス流路に燃料ガスを供給する淡燃焼用燃料ガス供給手
段と、前記一対の燃焼部夫々の前記濃燃焼用二次空気流
路及び前記淡燃焼用混合ガス流路に燃焼用空気を供給す
る送風手段が設けられている点にある。[0011] A third characteristic configuration is that a partition wall provided between each of the pair of combustion sections and partitioning between the rich combustion walls is positioned above the rich combustion wall in a direction in which a combustion gas flows in the rich combustion wall. The side edge and the lean combustion wall are provided so as to extend to the upstream side in the combustion gas flow direction from the upstream side edge in the combustion gas flow direction, and partition between the partition wall and the exterior wall. The partition wall is provided so as to extend from the upper edge of the rich combustion wall in the combustion gas flow direction or the upper edge of the light combustion wall in the combustion gas flow direction to the upper side in the combustion gas flow direction. Between the exterior wall and the partition wall, as a light combustion mixed gas flow path for sending a mixed gas to the light combustion flame outlet,
The partition wall and the partition wall are configured as a rich combustion secondary air flow path for sending the rich combustion secondary air to the rich combustion secondary air discharge port, Fuel gas supply means for supplying fuel gas to the combustion mixed gas flow path; and combustion air flowing to the rich combustion secondary air flow path and the lean combustion mixed gas flow path of each of the pair of combustion sections. In that a blowing means for supplying the air is provided.

【００１２】第４の特徴構成は、燃料ガスと燃焼用空気
とを混合して混合ガスを生成し、その混合ガスを前記濃
燃焼用炎口に供給する混合室が、前記濃燃焼用壁体の燃
焼ガス流動方向の上手側端縁から燃焼ガス流動方向上手
側へ延びる状態で設けられ、前記淡燃焼用燃料ガス供給
手段が、前記混合室の燃焼ガス流動方向の上手側端縁か
ら燃焼ガス流動方向上手側へ延びる状態で設けられ、前
記混合室及び前記淡燃焼用燃料ガス供給手段を前記隔壁
体として機能させるように構成されている点にある。A fourth characteristic configuration is that a mixing chamber which mixes fuel gas and combustion air to generate a mixed gas and supplies the mixed gas to the rich combustion flame outlet is provided by the rich combustion wall body. The fuel gas supply means for lean combustion is provided so as to extend from the upper edge of the combustion gas flow direction to the upper side in the combustion gas flow direction. The mixing chamber and the fuel gas supply unit for lean combustion are provided so as to extend to the upstream side in the flow direction, and are configured to function as the partition wall.

【００１３】第５の特徴構成は、前記外装壁体に向かっ
て突出する状態で前記隔壁体に取り付けられた流路狭窄
体と、前記隔壁体に向かって突出する状態で前記外装壁
体に取り付けられた流路狭窄体とが、燃焼ガス流動方向
に沿って互い違いに配置されている点にある。A fifth characteristic configuration is that a flow path narrowing body attached to the partition wall in a state protruding toward the exterior wall body and a flow path narrowing body attached to the exterior wall body in a state protruding toward the partition wall body. The narrowed flow path narrowed bodies are arranged alternately along the flow direction of the combustion gas.

【００１４】第６の特徴構成は、前記淡燃焼用混合ガス
流路における空気供給口に設けられた整流用の多孔板の
開口面積が、前記濃燃焼用二次空気流路における空気供
給口に設けられた整流用の多孔板の開口面積よりも大に
なるように構成され、且つ、前記淡燃焼用混合ガス流路
における流路横断面積が、前記濃燃焼用二次空気流路に
おける流路横断面積よりも大になるように構成されてい
る点にある。A sixth characteristic configuration is that the opening area of the rectifying perforated plate provided at the air supply port in the mixed gas flow path for lean combustion is adjusted to the air supply port in the secondary air flow path for rich combustion. It is configured to be larger than the opening area of the provided perforated plate for rectification, and the cross-sectional area of the flow path in the mixed gas flow path for lean combustion is the flow path in the secondary air flow path for rich combustion. The point is that it is configured to be larger than the cross-sectional area.

【００１５】第７の特徴構成は、前記淡燃焼用燃料ガス
供給手段が、終端部が閉塞し且つ前記濃燃焼用炎口の並
設方向に往復する管路と、その管路における復路部に前
記並設方向に沿って間隔を隔てて形成された複数の燃料
ガス噴出孔を備えて構成されている点にある。A seventh characteristic configuration is that the lean combustion fuel gas supply means includes a pipe having a closed end and reciprocating in the direction of juxtaposition of the rich combustion flame, and a return path in the pipe. The present invention is characterized in that it is provided with a plurality of fuel gas injection holes formed at intervals along the direction of the juxtaposition.

【００１６】[0016]

【作用】第１の特徴構成による作用は、以下の通りであ
る。濃燃焼用壁面に付着する燃焼炎を形成する状態で空
気過剰率の低い濃燃焼を行わせ、その濃燃焼用壁面に付
着して燃焼する燃焼炎（以下、濃燃焼炎と称する場合が
ある）を保炎として、淡燃焼用壁面に付着する状態で空
気過剰率の高い淡燃焼を行わせることができるので、燃
焼温度を低くすることができる。そして、濃燃焼と淡燃
焼とを、夫々異なる壁面にて、夫々面状態で互いに対向
する状態で行わせるので、淡燃焼に対する濃燃焼炎によ
る保炎効果を効果的に作用させることができ、又、濃燃
焼炎と淡燃焼用壁面に付着して燃焼する燃焼炎（以下、
淡燃焼炎と称する場合がある）との干渉を抑制すること
ができる。又、濃燃焼用吐出手段からは、濃燃焼用壁面
に付着する濃燃焼炎を形成する状態で燃料ガス及び燃焼
用空気を吐出し、一方、淡燃焼用吐出手段からは、淡燃
焼用壁面に付着する淡燃焼炎を形成する状態で燃料ガス
及び燃焼用空気を吐出するので、濃燃焼用の混合ガスと
淡燃焼用の混合ガスとが同じ燃焼面形成用壁面において
互い違いの位置から吐出されるような状態ではない。従
って、濃燃焼用吐出手段から吐出される燃料ガス及び燃
焼用空気と淡燃焼用吐出手段から吐出される燃料ガス及
び燃焼用空気との干渉を抑制することができるので、乱
流の発生を抑制することができる。The operation of the first characteristic configuration is as follows. A rich combustion with a low excess air ratio is performed in a state of forming a combustion flame adhering to the rich combustion wall surface, and the combustion flame adhering to the rich combustion wall surface and burning (hereinafter sometimes referred to as a rich combustion flame). As a flame holding, it is possible to perform light combustion with a high excess air ratio in a state where it is attached to the wall surface for light combustion, so that the combustion temperature can be lowered. Since the rich combustion and the light combustion are performed on different wall surfaces in a state where they face each other in a plane state, the flame holding effect of the rich combustion flame with respect to the light combustion can be effectively exerted, and , A combustion flame that adheres to the rich combustion flame and the light combustion wall and burns
(Sometimes referred to as light combustion flame). Further, the fuel gas and the combustion air are discharged from the rich combustion discharge means in a state where a rich combustion flame adhered to the rich combustion wall is formed, while the light combustion discharge means discharges the light combustion wall to the light combustion wall. Since the fuel gas and the combustion air are discharged in a state in which the light combustion flame adheres, the mixed gas for the rich combustion and the mixed gas for the light combustion are discharged from alternate positions on the same combustion surface forming wall surface. Not in such a state. Therefore, interference between the fuel gas and the combustion air discharged from the rich combustion discharge means and the fuel gas and the combustion air discharged from the light combustion discharge means can be suppressed, thereby suppressing turbulence. can do.

【００１７】ＮＯｘの発生量が少ない淡燃焼の燃焼量を
多くして全体のＮＯｘの発生量を低減するため、濃燃焼
用壁面の面積を淡燃焼用壁面の面積よりも狭くするとと
もに、濃燃焼の保炎作用を効果的に作用させるため、濃
燃焼用壁体と淡燃焼用壁体との相対配置関係において
は、燃焼ガス流動方向において、濃燃焼用壁体の燃焼ガ
ス流動方向の下手側端縁を淡燃焼用壁体の燃焼ガス流動
方向の下手側端縁よりも燃焼ガス流動方向上手側に配置
して、濃燃焼用壁面を淡燃焼用壁面における燃焼ガス流
動方向の上手側部分に対向させるようにしている。この
ような濃燃焼用壁体と淡燃焼用壁体との相対配置関係に
おいて、淡燃焼用壁体を外装壁体側に位置させたことに
より、濃燃焼用壁体と対向しない状態の、淡燃焼用壁体
の燃焼ガス流動方向の下手側部分は、もう一方の淡燃焼
用壁体と対向する状態となるので、淡燃焼用壁面の全面
において、淡燃焼を安定的に行わせることができる。し
かも、淡燃焼用壁体の燃焼ガス流動方向の下手側端縁
を、燃焼ガス流動方向において、外装壁体の燃焼ガス流
動方向の下手側端縁と同じ位置又は略同じ位置に配置し
てあるので、外装壁体は淡燃焼用壁体に覆われて、淡燃
焼炎や濃燃焼炎に曝されることがない。In order to increase the amount of light combustion in light combustion, in which the amount of generated NOx is small, and to reduce the overall amount of generated NOx, the area of the rich combustion wall surface is made smaller than that of the light combustion wall surface, and In order to make the flame holding effect of the rich combustion wall work effectively, in the relative arrangement relationship between the rich combustion wall and the light combustion wall, in the combustion gas flow direction, the lower side of the rich combustion wall in the combustion gas flow direction The edge is arranged on the upper side of the combustion gas flow direction in the combustion gas flow direction from the lower edge of the lean combustion wall body in the combustion gas flow direction, and the rich combustion wall surface is located on the upper side portion of the light combustion wall in the combustion gas flow direction. It is made to face. In such a relative arrangement relationship between the rich combustion wall and the light combustion wall, by placing the light combustion wall on the exterior wall side, the light combustion in a state not facing the rich combustion wall is performed. The lower portion of the wall for combustion in the flow direction of the combustion gas is in a state of facing the other light combustion wall, so that light combustion can be stably performed on the entire surface of the light combustion wall. Moreover, the lower edge of the lean combustion wall in the combustion gas flow direction is disposed at the same position or substantially the same position as the lower edge of the exterior wall in the combustion gas flow direction in the combustion gas flow direction. Therefore, the exterior wall is covered with the light combustion wall, and is not exposed to the light combustion flame or the rich combustion flame.

【００１８】第２の特徴構成による作用は、以下の通り
である。濃燃焼用炎口から濃燃焼用壁面に沿わせて吐出
される空気過剰率の低い混合ガスに対して、その混合ガ
ス吐出方向に延びるスリット状の濃燃焼用二次空気吐出
口から満遍なく燃焼用二次空気を供給することができる
ので、濃燃焼用壁面において、濃燃焼用炎口から吐出さ
れる混合ガスを、面状態の濃燃焼炎を形成する状態で、
安定的に燃焼させることができる。一方、スリット状の
淡燃焼用炎口からは、面状態の濃燃焼炎と対向する状態
で空気過剰率の高い混合ガスが吐出されるので、その淡
燃焼用炎口から吐出される混合ガスに対して濃燃焼炎に
よる保炎効果を効果的に作用させることができ、淡燃焼
用壁面において、淡燃焼用炎口から吐出される混合ガス
を、面状態の淡燃焼炎を形成する状態で安定的に燃焼さ
せることができる。The operation of the second characteristic configuration is as follows. For a mixed gas with a low excess air ratio discharged along the rich combustion wall from the rich combustion flame outlet, a slit-shaped secondary air outlet for rich combustion extending in the mixed gas discharge direction is used for uniform combustion. Since the secondary air can be supplied, on the rich combustion wall surface, the mixed gas discharged from the rich combustion flame port is formed in a state where a rich combustion flame in a surface state is formed.
It can be stably burned. On the other hand, a mixed gas having a high excess air ratio is discharged from the slit-shaped light combustion flame outlet in a state facing the rich combustion flame in the surface state, so that the mixed gas discharged from the light combustion flame outlet is discharged. On the other hand, the flame stabilizing effect of the rich combustion flame can be effectively applied, and the mixed gas discharged from the light combustion flame outlet on the light combustion wall is stable in a state where a light combustion flame in the surface state is formed. It can be burned.

【００１９】第３の特徴構成による作用は、以下の通り
である。仕切り壁体にて、２枚の濃燃焼用壁体の間を区
画し、隔壁体にて、仕切り壁体と隔壁体との間を区画し
て、濃燃焼用壁体夫々に対して濃燃焼用二次空気流路を
設け、淡燃焼用壁体夫々に対して淡燃焼用混合ガス流路
を設け、二つの濃燃焼用二次空気流路及び二つの淡燃焼
用混合ガス流路に対して、一つの送風手段にて、燃焼用
空気を供給する。又、淡燃焼用混合ガス流路にて、淡燃
焼用燃料ガス供給手段から供給される燃料ガスと、送風
手段から供給される燃焼用空気とを良好に混合して混合
ガスを生成し、その混合ガスを淡燃焼用壁体に供給す
る。つまり、２枚の濃燃焼用壁体の夫々にて行う濃燃焼
用の燃焼用空気、及び、２枚の淡燃焼用壁体の夫々にて
行う淡燃焼用の燃焼用空気を、一つの送風手段にて供給
するようにしながら、濃燃焼用壁体夫々に対して設けた
濃燃焼用二次空気流路、及び、淡燃焼用壁体夫々に対し
て設けた淡燃焼用混合ガス流路を通じて、燃焼用空気を
供給するようにしてあるので、濃燃焼用壁体及び淡燃焼
用壁体夫々に対して、供給量の変動を少なくしながら、
所望の量の燃焼用空気を安定して供給することができ
る。又、淡燃焼用壁体に供給する淡燃焼用の混合ガスの
空燃比の変動を小さくすることができる。The operation of the third characteristic configuration is as follows. The partition wall partitions between the two rich combustion walls, and the partition partitions the partition wall and the partition, and performs rich combustion on each of the rich combustion walls. A secondary air flow path for light combustion, a mixed gas flow path for light combustion is provided for each of the lean combustion walls, and two secondary air flow paths for rich combustion and two mixed gas flow paths for light combustion are provided. Thus, the combustion air is supplied by one blowing means. Further, in the mixed gas flow path for lean combustion, the fuel gas supplied from the fuel gas supply means for lean combustion and the combustion air supplied from the blowing means are satisfactorily mixed to generate a mixed gas. The mixed gas is supplied to the wall for light combustion. In other words, the combustion air for rich combustion performed on each of the two rich combustion walls and the combustion air for light combustion performed on each of the two lean combustion walls are provided in one blower. While being supplied by means, through the rich combustion secondary air flow path provided for each rich combustion wall, and through the light combustion mixed gas flow path provided for each light combustion wall Since the combustion air is supplied, the variation of the supply amount is reduced with respect to the rich combustion wall and the light combustion wall, respectively.
A desired amount of combustion air can be supplied stably. Further, the fluctuation of the air-fuel ratio of the mixed gas for light combustion supplied to the wall for light combustion can be reduced.

【００２０】第４の特徴構成によれば、濃燃焼用壁体に
供給する濃燃焼用の混合ガスを生成する混合室を、濃燃
焼用壁体の燃焼ガス流動方向の上手側端縁から燃焼ガス
流動方向上手側へ延びる状態で設け、且つ、淡燃焼用燃
料ガス供給手段を、混合室の燃焼ガス流動方向の上手側
端縁から燃焼ガス流動方向上手側へ延びる状態で設ける
ことにより、それら混合室と淡燃焼用燃料ガス供給手段
とを、隔壁体として機能させることができる。According to the fourth characteristic configuration, the mixing chamber for generating the rich combustion mixed gas to be supplied to the rich combustion wall is burned from the upper edge of the rich combustion wall in the combustion gas flow direction. They are provided so as to extend upward in the gas flow direction, and the lean combustion fuel gas supply means is provided so as to extend from the upper edge of the mixing chamber in the combustion gas flow direction to the upper side in the combustion gas flow direction. The mixing chamber and the lean combustion fuel gas supply means can function as a partition.

【００２１】第５の特徴構成によれば、淡燃焼用混合ガ
ス流路を蛇行流路にして、淡燃焼用混合ガス流路を流動
する混合ガス流に乱流を発生させると共に、流路を長く
してあるので、燃料ガスと燃焼用空気との混合を一層促
進させることができる。According to the fifth characteristic configuration, the mixed gas flow path for lean combustion is formed as a meandering flow path to generate turbulence in the mixed gas flow flowing in the mixed gas flow path for lean combustion, and the flow path is formed. Because of the lengthening, the mixing of the fuel gas and the combustion air can be further promoted.

【００２２】第６の特徴構成による作用は、以下の通り
である。ＮＯｘの発生量が少ない淡燃焼の燃焼量を多く
して全体のＮＯｘの発生量を低減するため、淡燃焼の燃
焼量を濃燃焼の燃焼量よりも多くしているので、淡燃焼
用混合ガス流路を流動する混合ガスの量が多くなる。そ
こで、淡燃焼用混合ガス流路用の整流用多孔板の開口面
積を、濃燃焼用二次空気流路用の整流用多孔板の開口面
積よりも大に形成し、且つ、 淡燃焼用混合ガス流路に
おける流路横断面積を、濃燃焼用二次空気流路における
流路横断面積よりも大に形成することにより、淡燃焼用
混合ガス流路を流動する混合ガスの流速を抑制して、淡
燃焼用炎口から吐出する混合ガスの吐出速度を抑制する
ことができる。The operation of the sixth characteristic configuration is as follows. Since the amount of light combustion is increased to increase the amount of light combustion in which light emission of NOx is small to reduce the total amount of NOx generated, the amount of light combustion is made larger than the amount of combustion in rich combustion. The amount of the mixed gas flowing in the flow path increases. Therefore, the opening area of the rectifying perforated plate for the mixed gas flow path for lean combustion is formed larger than the opening area of the rectifying perforated plate for the secondary air flow path for rich combustion, and By forming the cross-sectional area of the gas flow path larger than the cross-sectional area of the secondary air flow path for rich combustion, the flow velocity of the mixed gas flowing through the mixed gas flow path for light combustion is suppressed. Further, the discharge speed of the mixed gas discharged from the light combustion flame outlet can be suppressed.

【００２３】第７の特徴構成による作用は、以下の通り
である。淡燃焼用燃料ガス供給手段は、濃燃焼用炎口の
並設方向に沿って、供給量のバラツキを少なくした状態
で燃料ガスを供給するように構成する必要がある。又、
淡燃焼用燃料ガス供給手段を構成する場合、終端部が閉
塞した管路を濃燃焼用炎口の並設方向に沿わせて配置
し、その管路に、前記並設方向に沿って複数の燃料ガス
噴出孔を間隔を隔てて形成することにより、簡単な構成
にて構成することができる。この場合、管路が片道管路
であれば、管路内部の燃料ガスの圧力が終端部に近づく
ほど高くなるので、燃料ガス噴出孔から噴出する燃料ガ
スの量が、終端部に近い燃料ガス噴出孔ほど多くなる傾
向となる。これに対して、管路を往復管路にすると、そ
の復路部内部における前記並設方向での燃料ガスの圧力
分布が小さくなるので、その復路部に燃料ガス噴出孔を
形成することにより、燃料ガス噴出孔間の燃料ガス噴出
量のバラツキを抑制することができる。The operation of the seventh characteristic configuration is as follows. The fuel gas supply means for light combustion needs to be configured to supply the fuel gas in a state in which the variation in the supply amount is small along the direction in which the combustion ports for rich combustion are arranged. or,
In the case of configuring the fuel gas supply means for light combustion, the pipes whose end portions are closed are arranged along the direction in which the flame openings for rich combustion are juxtaposed, and a plurality of pipes are arranged in the pipe along the juxtaposition direction. By forming the fuel gas ejection holes at intervals, a simple configuration can be achieved. In this case, if the pipe is a one-way pipe, the pressure of the fuel gas inside the pipe becomes higher as it approaches the terminal end, so that the amount of fuel gas ejected from the fuel gas ejection hole is reduced by the amount of fuel gas close to the terminal end. There is a tendency for the number to increase as the ejection hole increases. On the other hand, when the pipe is a reciprocating pipe, the pressure distribution of the fuel gas in the juxtaposed direction inside the return path becomes small, so that the fuel gas ejection hole is formed in the return path, so that the fuel gas is discharged. Variations in the fuel gas ejection amount between the gas ejection holes can be suppressed.

【００２４】[0024]

【発明の効果】第１の特徴構成によれば、空気過剰率の
高い淡燃焼を安定的に行って燃焼温度を低くすることが
できるので、ＮＯｘの発生量を低減することができ、
又、濃燃焼及び淡燃焼夫々の燃焼炎同士の干渉を抑制
し、且つ、濃燃焼用の燃料ガス及び燃焼用空気、及び、
淡燃焼用の燃料ガス及び燃焼用空気の夫々の吐出に伴う
乱流の発生を抑制することができるので、燃焼音を低減
することができるようになった。又、外装壁体は淡燃焼
用壁体に覆われて、淡燃焼炎や濃燃焼炎に曝されること
がないので、外装壁体の過熱を確実に防止することがで
き、耐久性を向上することができるようになった。According to the first characteristic configuration, the lean combustion with a high excess air ratio can be stably performed to lower the combustion temperature, so that the amount of generated NOx can be reduced,
Moreover, interference between the combustion flames of the rich combustion and the light combustion is suppressed, and the fuel gas and the combustion air for the rich combustion, and
Since the occurrence of turbulence caused by the discharge of the fuel gas for light combustion and the air for combustion can be suppressed, the combustion noise can be reduced. Also, since the exterior wall is covered with the light combustion wall and is not exposed to the light combustion flame or the rich combustion flame, overheating of the exterior wall can be reliably prevented, and the durability is improved. You can now.

【００２５】第２の特徴構成によれば、濃燃焼用壁面に
おいて、面状態の濃燃焼炎を形成する状態で、濃燃焼を
安定的に行わせることができ、淡燃焼用壁面において、
面状態の淡燃焼炎を形成する状態で、淡燃焼を安定的に
行わせることができるので、上記第１の特徴構成による
効果を実現するための好適な手段が得られる。According to the second characteristic configuration, rich combustion can be stably performed in a state where a rich combustion flame in a surface state is formed on the rich combustion wall surface.
Since the light combustion can be stably performed in the state where the light combustion flame in the surface state is formed, suitable means for realizing the effect of the first characteristic configuration can be obtained.

【００２６】第３の特徴構成によれば、２枚の濃燃焼用
壁体の夫々にて行う濃燃焼用の燃焼用空気、及び、２枚
の淡燃焼用壁体の夫々にて行う淡燃焼用の燃焼用空気
を、一つの送風手段にて供給するようにして、構成の簡
略化を図りながらも、濃燃焼用壁体及び淡燃焼用壁体夫
々に対して所望の量の燃焼用空気を安定して供給するこ
とができるので、濃燃焼及び淡燃焼を一層安定して行わ
せることができるようになった。According to the third characteristic configuration, combustion air for rich combustion performed on each of the two rich combustion walls, and light combustion performed on each of the two lean combustion walls. A desired amount of combustion air is supplied to each of the rich combustion wall and the light combustion wall while simplifying the configuration by supplying the combustion air for combustion using a single blowing means. Can be supplied stably, so that rich combustion and lean combustion can be performed more stably.

【００２７】第４の特徴構成によれば、当然設ける必要
がある混合室と淡燃焼用燃料ガス供給手段とを、隔壁体
として兼用することができるので、隔壁体を別途設ける
必要がなく、バーナの構成を一層簡略化することができ
るようになった。According to the fourth characteristic configuration, the mixing chamber and the lean combustion fuel gas supply means, which need to be provided, can also be used as the partition, so that there is no need to provide a separate partition, and the burner is not required. Can be further simplified.

【００２８】第５の特徴構成によれば、淡燃焼用の混合
ガスの混合状態を一層良好なものにできるので、淡燃焼
を一層安定して行わせることができるようになった。According to the fifth characteristic configuration, the mixing state of the mixed gas for lean combustion can be further improved, so that lean combustion can be performed more stably.

【００２９】第６の特徴構成によれば、淡燃焼用炎口か
ら吐出する混合ガスの吐出速度を抑制して、淡燃焼炎の
リフトを抑制することができるので、淡燃焼を一層安定
して行わせることができるようになった。According to the sixth aspect, the discharge speed of the mixed gas discharged from the light combustion flame outlet can be suppressed, and the lift of the light combustion flame can be suppressed. You can now do it.

【００３０】第７の特徴構成によれば、淡燃焼用燃料ガ
ス供給手段を簡単に構成しながら、淡燃焼用の燃料ガス
の供給量のバラツキを少なくすることができるので、バ
ーナの構成を一層簡略化しながらも、淡燃焼を一層安定
して行わせることができるようになった。According to the seventh characteristic configuration, it is possible to reduce the variation in the supply amount of the fuel gas for lean combustion while simplifying the configuration of the fuel gas supply means for lean combustion. While simplifying, the lean combustion can be performed more stably.

【００３１】[0031]

【実施例】以下、図１ないし図６に基づいて、本発明の
実施例を説明する。先ず、図１ないし図４に基づいてバ
ーナの構成について説明する。角筒状のバーナケーシン
グ１における互いに対向する一対の側壁（外装壁体に相
当する）１Ａの間に、燃焼ガスが上方に向かって流動す
る一対の燃焼部Ｂを並置し、それら一対の燃焼部Ｂの夫
々に、側面視において左右対称となるように、単バーナ
を形成してある。以下、左側の燃焼部Ｂの単バーナにつ
いて説明する。尚、この説明に準じて、右側の燃焼部Ｂ
の単バーナについても理解できるので、右側の燃焼部Ｂ
の単バーナについては説明を省略する。又、本実施例に
おいては、燃焼ガス流動方向Ｆは、上向きであるので、
以下の説明においては、燃焼ガス流動方向Ｆの上手側を
下方側、下手側を上方側と夫々記載する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the burner will be described with reference to FIGS. Between a pair of side walls (corresponding to an exterior wall) 1A of the rectangular cylindrical burner casing 1 which are opposed to each other, a pair of combustion portions B in which combustion gas flows upward are juxtaposed, and the pair of combustion portions is provided. A single burner is formed in each of B so as to be symmetrical in a side view. Hereinafter, the single burner of the left combustion section B will be described. In addition, according to this description, the right combustion portion B
The combustion section B on the right side
The description of the single burner is omitted. In the present embodiment, since the combustion gas flow direction F is upward,
In the following description, the upper side of the combustion gas flow direction F is described as the lower side, and the lower side is described as the upper side.

【００３２】濃燃焼用壁体９と淡燃焼用壁体１０とを、
それらの間に燃焼空間Ｓを形成するように対向並置させ
た状態で、且つ、淡燃焼用壁体１０を側壁１Ａ側に位置
させた状態で配置してある。淡燃焼用壁体１０の燃焼空
間Ｓに対向する面を、淡燃焼用壁面１０Ｓとして構成
し、且つ、淡燃焼用壁体１０の燃焼ガス流動方向Ｆの下
手側端縁（以下、上端縁と略記する）を、燃焼ガス流動
方向Ｆにおいて、側壁１Ａの燃焼ガス流動方向Ｆの下手
側端縁（以下、上端縁と略記する）と同じ位置に配置
し、濃燃焼用壁体９の燃焼空間Ｓに対向する面を、濃燃
焼用壁面９Ｓとして構成し、且つ、濃燃焼用壁体９の燃
焼ガス流動方向Ｆの下手側端縁（以下、上端縁と略記す
る）を、側壁１Ａの上端縁よりも下方側の位置に配置し
てある。The rich combustion wall 9 and the light combustion wall 10 are
They are arranged in a state where they are arranged side by side so as to form a combustion space S between them, and in a state where the light combustion wall body 10 is positioned on the side wall 1A side. The surface of the light burning wall 10 facing the combustion space S is configured as the light burning wall 10S, and the lower edge of the light burning wall 10 in the combustion gas flow direction F (hereinafter referred to as the upper edge). Abbreviated) in the combustion gas flow direction F at the same position as the lower edge of the combustion gas flow direction F of the side wall 1A (hereinafter, abbreviated as the upper edge), and the combustion space of the rich combustion wall 9. The surface facing S is configured as a rich combustion wall surface 9S, and the lower edge of the rich combustion wall body 9 in the combustion gas flow direction F (hereinafter, simply referred to as an upper edge) is an upper end of the side wall 1A. It is located below the edge.

【００３３】濃燃焼用壁面９Ｓに付着する燃焼炎を形成
する状態で空気過剰率の低い濃燃焼を行うように、燃料
ガス及び燃焼用空気を吐出する濃燃焼用吐出手段Ｆｃ
と、濃燃焼用壁面９Ｓに付着して燃焼する燃焼炎を保炎
として淡燃焼用壁面１０Ｓに付着する燃焼炎を形成する
状態で空気過剰率の高い淡燃焼を行うように、燃料ガス
及び燃焼用空気を吐出する淡燃焼用吐出手段Ｆｒとを設
けてある。A rich combustion discharge means Fc for discharging fuel gas and combustion air so as to perform a rich combustion with a low excess air ratio in a state where a combustion flame adhered to the rich combustion wall surface 9S is formed.
The fuel gas and combustion are performed such that the combustion flame adhering to the rich combustion wall surface 9S and the combustion flame adhering to the lean combustion wall surface 10S are formed as the flame holding and the light combustion with a high excess air ratio is performed. And a discharge means Fr for light combustion for discharging air for use.

【００３４】濃燃焼用吐出手段Ｆｃは、濃燃焼用壁体９
の燃焼ガス流動方向Ｆの上手側端縁（以下、下端縁と略
記する）に間隔を隔てて並設されて、燃料ガスと燃焼用
空気との混合ガスを濃燃焼用壁面９Ｓに沿わせて吐出す
る複数個の濃燃焼用炎口８と、隣接する濃燃焼用炎口８
の間に対応する位置から濃燃焼用炎口８からの混合ガス
吐出方向に延びるスリット状に濃燃焼用壁体９に形成さ
れて、濃燃焼用二次空気を燃焼空間Ｓに向けて吐出する
濃燃焼用二次空気吐出口１１を備えて構成してある。淡
燃焼用吐出手段Ｆｒは、濃燃焼用二次空気吐出口１１と
同方向に延びるスリット状に、且つ、濃燃焼用炎口８の
並設方向に間隔を隔てた状態で淡燃焼用壁体１０に形成
されて、燃料ガスと燃焼用空気との混合ガスを燃焼空間
Ｓ内に向けて吐出する複数個の淡燃焼用炎口１３を備え
て構成してある。The rich combustion discharge means Fc is provided with a rich combustion wall 9.
Are arranged side by side at intervals on the upper edge (hereinafter abbreviated as the lower edge) of the combustion gas flow direction F, and the mixed gas of the fuel gas and the combustion air flows along the rich combustion wall surface 9S. A plurality of rich burn flames 8 to be discharged, and adjacent rich burn flames 8
Is formed in the rich combustion wall 9 in a slit shape extending in the direction of discharging the mixed gas from the rich combustion flame port 8 from a position corresponding to the above, and discharges the secondary air for rich combustion toward the combustion space S. A secondary air discharge port 11 for rich combustion is provided. The light-combustion discharge means Fr is formed in a slit shape extending in the same direction as the rich-combustion secondary air discharge port 11 and is spaced apart in the direction in which the rich-combustion flame ports 8 are arranged side by side. The fuel cell 10 is provided with a plurality of light combustion flame ports 13 for discharging a mixed gas of fuel gas and combustion air toward the combustion space S.

【００３５】一対の燃焼部Ｂの夫々に設けられた濃燃焼
用壁体９の間を区画する仕切り壁体２を、濃燃焼用壁体
９の下端縁及び淡燃焼用壁体１０の燃焼ガス流動方向Ｆ
の上手側端縁（以下、下端縁と略記する）よりも下側に
延びる状態で設けてある。又、燃料ガスと燃焼用空気と
を混合して混合ガスを生成し、その混合ガスを濃燃焼用
炎口８に供給する混合室３を、濃燃焼用壁体９の下端縁
から下方側へ延びる状態で設け、後述する淡燃焼用混合
ガス流路１９に燃料ガスを供給する淡燃焼用燃料ガス供
給手段としての淡燃焼用燃料ガス供給部１７を、混合室
３の燃焼ガス流動方Ｆの上手側端縁から下方側へ延びる
状態で設けてある。そして、混合室３及び淡燃焼用燃料
ガス供給部１７と側壁１Ａとの間を、淡燃焼用炎口１３
に混合ガスを送る淡燃焼用混合ガス流路１９とし、且
つ、混合室３及び淡燃焼用燃料ガス供給部１７と仕切り
壁体２との間を、濃燃焼用二次空気吐出口１１に濃燃焼
用二次空気を送る濃燃焼用二次空気流路１８とするよう
に構成してある。つまり、混合室３及び淡燃焼用燃料ガ
ス供給部１７を、濃燃焼用壁体９の下端縁又は淡燃焼用
壁体１０の下端縁から下方側へ延びる状態で設けて、仕
切り壁体２と側壁１Ａとの間を区画する隔壁体Ｗとして
機能させるように構成してある。The partition wall 2 for partitioning between the rich combustion walls 9 provided in each of the pair of combustion sections B is divided into the lower end edge of the rich combustion wall 9 and the combustion gas of the light combustion wall 10. Flow direction F
, And extend below the upper edge (hereinafter, abbreviated as the lower edge) of the upper side. Further, the mixing chamber 3 for mixing the fuel gas and the combustion air to generate a mixed gas and supplying the mixed gas to the rich combustion flame 8 is moved downward from the lower edge of the rich combustion wall 9. A lean combustion fuel gas supply unit 17 as a lean combustion fuel gas supply means for supplying a fuel gas to a lean combustion mixed gas flow path 19 described later is provided in an extended state. It is provided so as to extend downward from the upper edge. Then, between the mixing chamber 3 and the lean combustion fuel gas supply unit 17 and the side wall 1A, the lean combustion flame port 13 is formed.
The mixed combustion gas flow path 19 for feeding the mixed gas to the rich combustion secondary air discharge port 11 between the mixing chamber 3 and the lean combustion fuel gas supply unit 17 and the partition wall 2 is provided. It is configured to be a secondary air flow path 18 for rich combustion that sends secondary air for combustion. In other words, the mixing chamber 3 and the fuel gas supply unit 17 for light combustion are provided so as to extend downward from the lower edge of the wall 9 for rich combustion or the lower edge of the wall 10 for light combustion. It is configured to function as a partition wall W that partitions between the side wall 1A.

【００３６】次に、混合室３及び淡燃焼用燃料ガス供給
部１７について説明を加える。図中のＭは、濃燃焼用吸
入口３ａ、その濃燃焼用吸入口３ａに連なる混合流路３
ｂ及びその混合流路３ｂに連なる配分部３ｃ、並びに、
淡燃焼用供給口１７ａ及びその淡燃焼用供給口１７ａに
連なり且つ終端部が閉塞し且つ濃燃焼用炎口８の並設方
向に往復する管路１７ｂを備えた状態で板状に形成した
混合管である。その板状の混合管Ｍを、仕切り壁体２に
対向させた状態で、且つ、側面視において、燃焼部Ｂの
上下方向中央よりも下方に位置させて配設してある。管
路１７ｂの復路部には、複数の燃料ガス噴出孔１７ｃを
前記並設方向に沿って間隔を隔てて形成してある。正面
視において、バーナケーシング１内の左右両側夫々に、
バーナケーシング１の側壁１Ｂと所定の間隔を隔てた状
態で内壁体４を立設してある。そして、混合管Ｍの両側
端部夫々を内壁体４に取着してある。混合管Ｍは、プレ
ス加工した１枚の金属板５を二つ折りにして重ね合わ
せ、重ね合わせた２枚の板状部５Ａ，５Ｂ同士の間に、
濃燃焼用吸入口３ａ、混合流路３ｂ、配分部３ｃ、淡燃
焼用供給口１７ａ及び往復流路１７ｂを形成して構成し
てある。尚、金属板５を二つ折りにするに当たっては、
板状部５Ａの上端縁を板状部５Ｂの上端縁よりも高くな
るようにしてある。又、板状部５Ａにおける板状部５Ｂ
の上端縁よりも上方に位置する部分５Ａａは、上方ほど
仕切り壁体２に近づく傾斜状に形成してある。混合室３
は、混合官Ｍの濃燃焼用吸入口３ａ、混合流路３ｂ及び
配分部３ｃにより構成してあり、淡燃焼用燃料ガス供給
部１７は、混合官Ｍの淡燃焼用供給口１７ａ、管路１７
ｂ、及び、その管路１７ｂの復路部に前記並設方向に沿
って間隔を隔てて形成された複数の燃料ガス噴出孔１７
ｃにより構成してある。つまり、混合室３及び淡燃焼用
燃料ガス供給部１７を、混合管Ｍにより一体的に構成し
てある。Next, the mixing chamber 3 and the fuel gas supply unit 17 for lean combustion will be described. In the figure, M denotes a rich combustion intake port 3a, and a mixing flow path 3 connected to the rich combustion intake port 3a.
b and a distribution unit 3c connected to the mixing channel 3b, and
Mixing formed in a plate shape with a light-burning supply port 17a and a pipe line 17b connected to the light-burning supply port 17a and having a closed end and reciprocating in the direction in which the rich-burning flame port 8 is juxtaposed. Tube. The plate-shaped mixing tube M is disposed so as to face the partition wall 2 and to be positioned below the vertical center of the combustion portion B in a side view. A plurality of fuel gas injection holes 17c are formed in the return path of the pipe 17b at intervals along the above-mentioned juxtaposition direction. In a front view, on each of the left and right sides in the burner casing 1,
The inner wall 4 is provided upright at a predetermined distance from the side wall 1B of the burner casing 1. Each side end of the mixing tube M is attached to the inner wall 4. The mixing tube M is formed by folding one press-formed metal plate 5 into two, and superimposing the metal plate 5 between the two superposed plate-shaped portions 5A and 5B.
The intake port 3a for rich combustion, the mixing channel 3b, the distribution section 3c, the supply port 17a for light combustion, and the reciprocating channel 17b are formed. In folding the metal plate 5 in two,
The upper edge of the plate portion 5A is higher than the upper edge of the plate portion 5B. Also, the plate portion 5B in the plate portion 5A
The portion 5Aa located above the upper edge of the partition wall 2 is formed so as to be inclined such that it approaches the partition wall 2 as it goes upward. Mixing room 3
Is composed of a rich combustion inlet 3a of the mixing agent M, a mixing channel 3b and a distribution section 3c. The light combustion fuel gas supply section 17 is provided with a light combustion supply port 17a of the mixing officer M, a pipeline. 17
b, and a plurality of fuel gas injection holes 17 formed at intervals in the return path of the pipe 17b along the juxtaposition direction.
c. That is, the mixing chamber 3 and the fuel gas supply unit 17 for lean combustion are integrally configured by the mixing pipe M.

【００３７】波板状の縦方向の面６Ａ及び平板状の横方
向の面６Ｂを備えた炎口形成部材６を、波板状の面６Ａ
における外側の突出頂部夫々を板状部５Ａにおける傾斜
部分５Ａａの内面に接触させ、且つ、平板状の面６Ｂの
端縁と板状部５Ｂの上端縁とを接続した状態で配置して
ある。そして、板状部５Ａにおける傾斜部分５Ａａと炎
口形成部材６における波板状の面６Ａとにより、配分部
３ｃに連通する角筒状通路７の列を形成し、その角筒状
通路７夫々の上端部における上向き開口を濃燃焼用炎口
８とすることにより、複数個の上向きの濃燃焼用炎口８
を所定の間隔を隔てて並設してある。The flame port forming member 6 having the corrugated plate-shaped vertical surface 6A and the flat plate-shaped horizontal surface 6B is replaced with the corrugated plate-shaped surface 6A.
Are contacted with the inner surface of the inclined portion 5Aa of the plate-shaped portion 5A, and are arranged in a state where the edge of the plate-shaped surface 6B and the upper edge of the plate-shaped portion 5B are connected. The inclined portion 5Aa of the plate portion 5A and the corrugated surface 6A of the flame port forming member 6 form a row of square tubular passages 7 communicating with the distribution portion 3c, and each of the square tubular passages 7 is formed. The upward opening at the upper end of the nozzle is defined as a rich combustion flame 8, whereby a plurality of upward rich combustion flames 8 are formed.
Are arranged side by side at a predetermined interval.

【００３８】次に、濃燃焼用壁体９及び淡燃焼用壁体１
０について説明を加える。濃燃焼用炎口８の列の全長に
わたる濃燃焼用壁体９を、その下端部を板状部５Ａの上
端部の外面に重ね合わせるとともに、傾斜部分５Ａａの
傾斜方向に延びる傾斜姿勢で配置してある。濃燃焼用壁
体９の両側端部夫々は内壁体４に取着してある。又、濃
燃焼用壁体９の上端縁は、仕切り壁体２の上端縁と接続
してある。Next, the rich combustion wall 9 and the light combustion wall 1
0 will be explained. The rich combustion wall 9 over the entire length of the row of rich combustion flames 8 is arranged such that the lower end thereof is superimposed on the outer surface of the upper end of the plate-shaped portion 5A and that the inclined wall 5 extends in the inclination direction of the inclined portion 5Aa. It is. Each of both side ends of the rich combustion wall 9 is attached to the inner wall 4. The upper edge of the rich combustion wall 9 is connected to the upper edge of the partition wall 2.

【００３９】濃燃焼用炎口８の列の全長にわたる淡燃焼
用壁体１０を、その下端部を板状部５Ｂの上端部の外面
に重ね合わせ、且つ、その上端縁を側壁１Ａの上端縁に
接続した状態で、上方ほど側壁１Ａに近づく傾斜姿勢に
て配置してある。淡燃焼用壁体１０の両側端部夫々を内
壁体４に取着してある。The light combustion wall 10 extending over the entire length of the row of rich combustion flames 8 has its lower end overlapped with the outer surface of the upper end of the plate-shaped portion 5B, and its upper end is formed by the upper end of the side wall 1A. Are arranged in an inclined posture in which the upper side is closer to the side wall 1A. Both side ends of the light burning wall 10 are attached to the inner wall 4.

【００４０】上述のように、混合室３、及び、濃燃焼用
壁体９を設けることにより、混合室３からの混合ガスを
濃燃焼用壁面９Ｓに沿わせて吐出する濃燃焼用炎口８の
複数個を、濃燃焼用壁体９の下端縁に間隔を隔てて並設
してある。As described above, by providing the mixing chamber 3 and the rich combustion wall 9, the rich combustion flame outlet 8 for discharging the mixed gas from the mixing chamber 3 along the rich combustion wall 9 S. Are arranged side by side on the lower edge of the rich combustion wall 9 at an interval.

【００４１】濃燃焼用壁体９における隣接する濃燃焼用
炎口８の間に対応する位置夫々には、隣接する濃燃焼用
炎口８の間に対応する位置から濃燃焼用炎口８からの混
合ガス吐出方向に延びるスリット状の濃燃焼用二次空気
吐出口１１を形成してある。又、濃燃焼用壁体９の上端
部で、隣接する濃燃焼用二次空気吐出口１１の間に対応
する位置夫々に、角孔状の補助濃燃焼用二次空気吐出口
１２を形成してある。The positions corresponding to the positions between the adjacent rich combustion flames 8 on the rich combustion wall 9 are respectively located from the positions corresponding to the positions between the adjacent rich combustion flames 8. And a slit-shaped secondary air discharge port 11 for rich combustion extending in the mixed gas discharge direction. Further, at the upper end of the rich combustion wall 9, a square hole-shaped auxiliary rich combustion secondary air discharge port 12 is formed at each position corresponding to the position between the adjacent rich combustion secondary air discharge ports 11. It is.

【００４２】淡燃焼用壁体１０には、濃燃焼用二次空気
吐出口１１と同方向に延びるスリット状の淡燃焼用炎口
１３の複数個を、夫々濃燃焼用二次空気吐出口１１と対
向させた状態で、且つ、濃燃焼用炎口８の並設方向に間
隔を隔てた状態で形成してある。尚、淡燃焼用炎口１３
の下端部は、濃燃焼用二次空気吐出口１１の下端部と同
じ高さになるようにしてある。又、淡燃焼用壁体１０の
上端部で、隣接する淡燃焼用炎口１３の間に対応する位
置夫々に、角孔状の補助淡燃焼用炎口１４を形成してあ
る。又、淡燃焼用壁体１０における隣接する淡燃焼用炎
口１３の間に対応する位置夫々に、丸孔状の補助淡燃焼
用炎口１５の複数個を、淡燃焼用炎口１３の延びる方向
と同方向に間隔を隔てた状態で並設してある。The light combustion wall 10 is provided with a plurality of slit-shaped light combustion flame outlets 13 extending in the same direction as the rich combustion secondary air discharge ports 11, respectively. And at a distance from each other in the direction in which the rich combustion ports 8 are juxtaposed. In addition, the flame port 13 for light combustion
The lower end of is formed to be the same height as the lower end of the secondary air discharge port 11 for rich combustion. In addition, at the upper end of the light burning wall 10, a square hole-shaped auxiliary light burning flame 14 is formed at a position corresponding to between the adjacent light burning flames 13. In addition, a plurality of round-hole-shaped auxiliary light burning flames 15 extend from the light burning wall 13 at positions corresponding to adjacent light burning flames 13 in the light burning wall 10. They are juxtaposed with a space in the same direction.

【００４３】混合室３の両側面には、混合流路３ｂ及び
配分部３ｃの形成部分の凸凹状の外面を覆う状態で、板
状体１６を付設してある。図４に示すように、板状体１
６夫々の上端部を、前述の濃燃焼用壁体９の下端部と板
状部５Ａの上端部との重ね合わせ部分、及び、淡燃焼用
壁体１０の下端部と板状部５Ｂの上端部との重ね合わせ
部分に重ね合わせるようにしてある。更に説明を加える
と、濃燃焼用壁体９の下端部に段差部９ａを形成し、淡
燃焼用壁体１０の下端部に段差部１０ａを形成し、その
段差部９ａ，１０ａ夫々に板状体１６夫々の上端部を嵌
め込む状態で、板状体１６を取着してある。又、板状体
１６の両側端部夫々は内壁体４に取着してある。もっ
て、板状体１６から濃燃焼用壁体９に連なる外面、及
び、板状体１６から淡燃焼用壁体１０に連なる外面が面
一状態になるようにしてある。On both sides of the mixing chamber 3, plate-like bodies 16 are provided so as to cover the uneven outer surfaces of the portions where the mixing channel 3b and the distribution section 3c are formed. As shown in FIG.
The upper end of each of the 6 upper and lower portions of the rich combustion wall 9 and the upper end of the plate-like portion 5A, and the lower end of the light combustion wall 10 and the upper end of the plate-like portion 5B. It is made to overlap with the overlapping part with the part. More specifically, a step 9a is formed at the lower end of the rich combustion wall 9 and a step 10a is formed at the lower end of the light combustion wall 10, and each of the steps 9a and 10a has a plate shape. The plate-like body 16 is attached with the upper end of each body 16 fitted. Each of both side ends of the plate 16 is attached to the inner wall 4. Thus, the outer surface extending from the plate 16 to the rich combustion wall 9 and the outer surface extending from the plate 16 to the light combustion wall 10 are flush.

【００４４】尚、混合管Ｍを配設するに当たっては、混
合管Ｍと側壁１Ａとの間隔が混合管Ｍと仕切り壁体２と
の間隔の２倍程度になる状態で配設して、淡燃焼用混合
ガス流路１９の流路横断面積が、濃燃焼用二次空気流路
１８の流路横断面積の約２倍になるようにしてある。When the mixing tube M is provided, the space between the mixing tube M and the side wall 1A is about twice as large as the space between the mixing tube M and the partition wall 2. The cross-sectional area of the mixed gas flow path 19 for combustion is about twice as large as the cross-sectional area of the secondary air flow path 18 for rich combustion.

【００４５】バーナケーシング１の下部開口部には、一
対の燃焼部Ｂ夫々の濃燃焼用二次空気流路１８及び淡燃
焼用混合ガス流路１９に燃焼用空気を供給する送風手段
としての送風機２０を設けてある。仕切り壁体２の下端
縁を、混合管Ｍの下端縁よりも下方に位置させてあり、
送風機２０からの燃焼用空気の整流用の多孔板２１を、
バーナケーシング１内部を横断する状態で仕切り壁体２
の下端縁に沿わせて設けてある。又、淡燃焼用混合ガス
流路１９の下端の空気供給口には、整流用の多孔板２２
を設け、濃燃焼用二次空気流路の下端の空気供給口に
は、整流用の多孔板２３を設けてあり、多孔板２２の開
口面積が多孔板２３の開口面積の約４倍になるようにし
てある。In the lower opening of the burner casing 1, there is provided a blower as a blowing means for supplying combustion air to the secondary air flow path 18 for rich combustion and the mixed gas flow path 19 for light combustion in each of the pair of combustion sections B. 20 are provided. The lower edge of the partition wall 2 is located below the lower edge of the mixing tube M,
The perforated plate 21 for rectifying the combustion air from the blower 20 is
The partition wall 2 traversing the burner casing 1
Are provided along the lower edge. The air supply port at the lower end of the mixed gas flow path 19 for lean combustion has a rectifying porous plate 22.
A perforated plate 23 for rectification is provided at the air supply port at the lower end of the secondary air flow path for rich combustion, and the opening area of the perforated plate 22 is about four times the opening area of the perforated plate 23. It is like that.

【００４６】所定間隔を隔てて並ぶ３列の三角形状の凸
条部２４ａを備えた波板材２４を、凸条部２４ａを濃燃
焼用炎口８の並設方向に沿わせた状態で、側壁１Ａの内
面に付設し、所定間隔を隔てて並ぶ２列の三角形状の凸
条部２５ａを備えた波板材２５を、凸条部２５ａを濃燃
焼用炎口８の並設方向に沿わせた状態で、混合管Ｍにお
ける淡燃焼用混合ガス流路１９に臨む面に付設した板状
体１６に付設してある。又、波板材２４及び波板材２５
を付設するに当たっては、側面視において、凸条部２４
ａと凸条部２５ａとが燃焼ガス流動方向Ｆに沿って互い
違いに配置するようにしてあり、もって、淡燃焼用混合
ガス流路１９を蛇行流路になるように構成してある。従
って、波板材２５の凸条部２５ａは、側壁１Ａに向かっ
て突出する状態で混合官Ｍ（隔壁体Ｗに相当する）に取
り付けられた流路狭窄体に相当し、波板材２４の凸条部
２４ａは、混合官Ｍ（隔壁体Ｗに相当する）に向かって
突出する状態で側壁１Ａに取り付けられた流路狭窄体に
相当する。A corrugated sheet 24 having three rows of triangular ridges 24a arranged at predetermined intervals is placed on the side wall with the ridges 24a arranged along the direction in which the rich combustion flame 8 is juxtaposed. The corrugated sheet material 25 having two rows of triangular convex ridges 25a attached to the inner surface of 1A and arranged at predetermined intervals is arranged along the direction in which the convex ridges 25a are arranged side by side with the rich combustion flame outlet 8. In this state, it is attached to a plate-like body 16 attached to a surface of the mixing pipe M facing the mixed gas flow path 19 for light combustion. Also, the corrugated sheet material 24 and the corrugated sheet material 25
At the time of attaching, a ridge 24
a and the ridges 25a are alternately arranged along the combustion gas flow direction F, so that the mixed gas flow path 19 for lean combustion is configured as a meandering flow path. Accordingly, the ridges 25a of the corrugated sheet material 25 correspond to the flow path constricting members attached to the mixing member M (corresponding to the partition wall W) in a state of protruding toward the side wall 1A. The portion 24a corresponds to a flow passage narrowing member attached to the side wall 1A so as to protrude toward the mixing agent M (corresponding to the partition wall W).

【００４７】混合室３の濃燃焼用吸入口３ａに、それと
同一軸芯状で、燃料ガス噴出用のノズル２６を配設して
ある。又、ノズル２６には、後述する濃燃焼用燃料ガス
供給路３２を接続し、淡燃焼用燃料ガス供給部１７の淡
燃焼用供給口１７ａには後述する淡燃焼用燃料ガス供給
路３３を接続してある。尚、上述のように構成したバー
ナの寸法は、幅（濃燃焼用炎口８の並設方向の長さ）が
１２０ｍｍ、奥行（燃焼部Ｂの並置方向の長さ）が７５
ｍｍであり、幅を、図８及び図９に示した従来のバーナ
の半分にしてある。但し、総燃焼量は、１５，０００Ｋ
ｃａｌ／ｈｒで前記従来のバーナの半分である。A fuel gas injection nozzle 26 having the same axial center as that of the rich combustion suction port 3a of the mixing chamber 3 is provided. The fuel gas supply passage 32 for rich combustion described later is connected to the nozzle 26, and the fuel gas supply passage 33 for light combustion described later is connected to the light combustion supply port 17 a of the light combustion fuel gas supply unit 17. I have. The dimensions of the burner configured as described above are such that the width (the length in the juxtaposition direction of the rich combustion flame 8) is 120 mm, and the depth (the length in the juxtaposition direction of the combustion portion B) is 75.
mm and the width is half that of the conventional burner shown in FIGS. However, the total combustion amount is 15,000K
cal / hr, half of the conventional burner.

【００４８】次に、上記の如く構成したバーナにおける
燃焼作用について説明する。尚、図１中左側の単バーナ
において、燃料ガスの流れを実線の矢印、空気の流れを
破線の矢印、及び、混合ガスの流れを一点鎖線の矢印に
て夫々図示する。先ず、濃燃焼用壁面９Ｓにて行う空気
過剰率の低い濃燃焼について説明する。ノズル２６から
混合室３の濃燃焼用吸入口３ａに濃燃焼用燃料ガスを噴
出すると、その噴出供給過程でノズル２６と吸入口３ａ
とで作られるエジェクター効果により濃燃焼用一次空気
が吸入され、それら濃燃焼用燃料ガスと濃燃焼用一次空
気とを混合流路３ｂを流動する過程で混合して、ブンゼ
ン燃焼を行う濃燃焼用混合ガスを生成する。この濃燃焼
用混合ガスの空気過剰率は１以下である。その濃燃焼用
混合ガスを配分部３ｃにて配分して濃燃焼用炎口８夫々
に導いて、濃燃焼用炎口８夫々から濃燃焼用壁面９Ｓに
沿って吐出する。一方、送風機２０から供給される空気
を濃燃焼用二次空気とし、その濃燃焼用二次空気を、濃
燃焼用二次空気流路１８を通流させて、濃燃焼用二次空
気吐出口１１夫々及び補助濃燃焼用二次空気吐出口１２
夫々から燃焼空間Ｓ内に吐出する。そして、濃燃焼用炎
口８夫々から濃燃焼用壁面９Ｓに沿って吐出する濃燃焼
用混合ガスを、濃燃焼用二次空気吐出口１１夫々及び補
助濃燃焼用二次空気吐出口１２夫々から吐出する濃燃焼
用燃焼用二次空気と混合して、濃燃焼用壁面９Ｓに付着
する燃焼炎Ｈｃを形成する状態で、空気過剰率の低い濃
燃焼を行う。尚、濃燃焼における全体の空気過剰率は
１．３〜１．５程度である。従って、濃燃焼用吐出手段
Ｆｃは、濃燃焼用炎口８、濃燃焼用二次空気吐出口１１
及び補助濃燃焼用二次空気吐出口１２により構成してあ
る。Next, the combustion action of the burner constructed as described above will be described. In the single burner on the left side in FIG. 1, the flow of the fuel gas is shown by a solid-line arrow, the flow of air is shown by a broken-line arrow, and the flow of the mixed gas is shown by a dash-dot-line arrow. First, the rich combustion with a low excess air ratio performed on the rich combustion wall surface 9S will be described. When the fuel gas for rich combustion is ejected from the nozzle 26 to the intake port 3a for rich combustion of the mixing chamber 3, the nozzle 26 and the intake port 3a
The primary air for rich combustion is sucked in by the ejector effect formed by the above, and the fuel gas for rich combustion and the primary air for rich combustion are mixed in the process of flowing through the mixing passage 3b to perform Bunsen combustion. Generate mixed gas. The excess air ratio of the mixed gas for rich combustion is 1 or less. The rich combustion gas mixture is distributed by the distribution unit 3c, guided to each of the rich combustion flames 8, and discharged from each of the rich combustion flames 8 along the rich combustion wall surface 9S. On the other hand, the air supplied from the blower 20 is used as the secondary air for rich combustion, and the secondary air for rich combustion is caused to flow through the secondary air passage 18 for rich combustion, and the secondary air outlet for rich combustion is discharged. 11 and secondary air outlet for auxiliary rich combustion 12
Each of them is discharged into the combustion space S. Then, the rich combustion mixed gas discharged from each of the rich combustion flames 8 along the rich combustion wall surface 9S is discharged from each of the rich combustion secondary air discharge ports 11 and the auxiliary rich combustion secondary air discharge ports 12. The rich combustion with a low excess air ratio is performed in a state where it is mixed with the discharged secondary air for combustion for rich combustion to form the combustion flame Hc attached to the wall surface 9S for rich combustion. The overall excess air ratio in the rich combustion is about 1.3 to 1.5. Accordingly, the rich combustion discharge means Fc includes the rich combustion flame 8 and the rich combustion secondary air discharge port 11.
And a secondary air discharge port 12 for auxiliary rich combustion.

【００４９】次に、淡燃焼用壁面１０Ｓにて行う空気過
剰率の高い淡燃焼について説明する。送風機２０から供
給される空気を淡燃焼用一次空気とし、その淡燃焼用一
次空気と淡燃焼用燃料ガス供給部１７のガス噴出孔１７
ｃから噴出された淡燃焼用燃料ガスとを、蛇行状の淡燃
焼用混合ガス流路１９を通流させる過程で混合して淡燃
焼用混合ガスを生成する。この淡燃焼用混合ガスは空気
過剰率が１．５以上の希薄混合ガスである。そして、そ
の淡燃焼用混合ガスを淡燃焼用炎口１３、補助淡燃焼用
炎口１４及び補助淡燃焼用炎口１５から吐出し、濃燃焼
用壁面９Ｓに付着して燃焼する燃焼炎Ｈｃを保炎とし
て、淡燃焼用壁面１０Ｓに付着する燃焼炎Ｈｒを形成す
る状態で空気過剰率の高い淡燃焼を行う。尚、淡燃焼用
混合ガスを淡燃焼用炎口１３だけでなく、補助淡燃焼用
炎口１４及び補助淡燃焼用炎口１５からも吐出すること
により、淡燃焼用壁面１０Ｓの略全面にわたって淡燃焼
による燃焼炎を形成するようにしてある。従って、淡燃
焼用炎口１３、補助淡燃焼用炎口１４及び補助淡燃焼用
炎口１５により、淡燃焼吐出手段Ｆｒを構成してある。Next, light combustion with a high excess air ratio performed on the light combustion wall surface 10S will be described. The air supplied from the blower 20 is used as the lean combustion primary air, and the lean combustion primary air and the gas ejection holes 17 of the lean combustion fuel gas supply unit 17 are provided.
The lean combustion fuel gas ejected from c is mixed in the process of flowing through the meandering lean combustion mixed gas flow path 19 to generate a lean combustion mixed gas. The mixed gas for lean combustion is a lean mixed gas having an excess air ratio of 1.5 or more. Then, the mixed gas for light combustion is discharged from the light combustion flame port 13, the auxiliary light combustion flame port 14, and the auxiliary light combustion flame port 15, and the combustion flame Hc that adheres to the rich combustion wall surface 9 </ b> S and burns. As flame holding, light combustion with a high excess air ratio is performed in a state where the combustion flame Hr attached to the light combustion wall surface 10S is formed. In addition, by discharging the mixed gas for light combustion not only from the light combustion flame port 13 but also from the auxiliary light combustion flame port 14 and the auxiliary light combustion flame port 15, the light gas is discharged over almost the entire surface of the light combustion wall surface 10S. A combustion flame is formed by combustion. Therefore, the light combustion discharge means Fr is constituted by the light combustion flame port 13, the auxiliary light combustion flame port 14, and the auxiliary light combustion flame port 15.

【００５０】又、隔壁体１６から濃燃焼用壁体９に連な
る外面、及び、隔壁体１６から淡燃焼用壁体１０に連な
る外面を面一状態にしてあることにより、濃燃焼用二次
空気流路１８を通流する濃燃焼用二次空気、及び、淡燃
焼用混合ガス流路１９を通流する淡燃焼用混合ガスの乱
流の発生を抑制している。そのことにより、乱流に起因
するバーナケーシング等の振動を抑制して、燃焼音を一
層低減している。The outer surface extending from the partition 16 to the rich combustion wall 9 and the outer surface extending from the partition 16 to the light combustion wall 10 are flush with each other. The turbulent flow of the secondary air for rich combustion flowing through the flow path 18 and the mixed gas for lean combustion flowing through the mixed gas flow path 19 for light combustion are suppressed. Thereby, the vibration of the burner casing and the like caused by the turbulent flow is suppressed, and the combustion noise is further reduced.

【００５１】尚、スリット状の濃燃焼用二次空気吐出口
１１のスリット幅を、例えば１．２ｍｍ程度に形成する
場合、スリット状の淡燃焼用炎口１３のスリット幅は、
１．０ｍｍより小さくなるように形成する。これは、淡
燃焼用炎口１３のスリット幅を１．０ｍｍ以上にする
と、淡燃焼用炎口１３から吐出される淡燃焼用混合ガス
の吐出速度が遅くなって、逆火を起こす虞があるからで
ある。When the slit width of the slit-shaped rich combustion secondary air discharge port 11 is formed to be, for example, about 1.2 mm, the slit-shaped light combustion flame port 13 has a slit width of:
It is formed to be smaller than 1.0 mm. This is because if the slit width of the light-burning flame port 13 is set to 1.0 mm or more, the discharge speed of the light-burning mixed gas discharged from the light-burning flame port 13 becomes slow, and there is a possibility that flashback may occur. Because.

【００５２】次に、図５及び図６に基づいて、濃燃焼用
及び淡燃焼用の燃料ガスを供給する燃料ガス供給部Ｇに
ついて説明する。Next, a fuel gas supply section G for supplying fuel gas for rich combustion and light fuel for lean combustion will be described with reference to FIGS.

【００５３】図６に示すように、燃料ガス供給路３１を
濃燃焼用燃料ガス供給路３２及び淡燃焼用燃料ガス供給
路３３に分岐し、濃燃焼用燃料ガス供給路３２をノズル
２６に接続し、淡燃焼用燃料ガス供給路３３を淡燃焼用
燃料ガス供給部１７の淡燃焼用供給口１７ａに接続して
ある。燃料ガス供給路３１に二つの電磁弁３４及び比例
弁３５を介装し、淡燃焼用燃料ガス供給路３３に電磁弁
３６を介装してある。As shown in FIG. 6, the fuel gas supply path 31 is branched into a rich combustion fuel gas supply path 32 and a light combustion fuel gas supply path 33, and the rich combustion fuel gas supply path 32 is connected to the nozzle 26. The fuel gas supply passage 33 for lean combustion is connected to the light combustion supply port 17a of the fuel gas supply part 17 for lean combustion. Two electromagnetic valves 34 and a proportional valve 35 are interposed in the fuel gas supply path 31, and an electromagnetic valve 36 is interposed in the lean combustion fuel gas supply path 33.

【００５４】図５に基づいて、燃焼量に応じた濃燃焼用
の燃料ガス供給量及び淡燃焼用の燃料ガス供給量の制御
構成について説明する。尚、図５において、細線にて濃
燃焼用の燃料ガス供給量を示し、破線にて淡燃焼用の燃
料ガス供給量を示し、太線にて濃燃焼用の燃料ガス供給
量及び淡燃焼用の燃料ガス供給量を合わせた全体燃料供
給量を示す。The control structure of the fuel gas supply amount for rich combustion and the fuel gas supply amount for lean combustion according to the combustion amount will be described with reference to FIG. In FIG. 5, the thin line indicates the fuel gas supply amount for rich combustion, the broken line indicates the fuel gas supply amount for light combustion, and the thick line indicates the fuel gas supply amount for rich combustion and the light combustion amount for light combustion. This shows the total fuel supply amount including the fuel gas supply amount.

【００５５】燃焼量が６，０００Ｋｃａｌ／ｈｒまで
は、電磁弁３６を閉成して、濃燃焼用のみの燃料ガスを
供給する状態で、比例弁３５の開度調整により全体燃料
供給量を増大する。燃焼量が６，０００Ｋｃａｌ／ｈｒ
以上では、電磁弁３６を開成して、濃燃焼用及び淡燃焼
用の両方の燃料ガスを供給し、且つ、濃燃焼用の燃料ガ
ス供給量と淡燃焼用の燃料ガス供給量との比が１：３〜
４になる状態で、比例弁３５の開度調整により全体燃料
供給量を増大する。電磁弁３６を閉成して、濃燃焼のみ
を行う場合でも、送風機２０からの空気が淡燃焼用混合
ガス流路１９を通流するので、バーナケーシング１を冷
却することができる。Until the combustion amount reaches 6,000 Kcal / hr, the solenoid valve 36 is closed to supply fuel gas only for rich combustion, and the total fuel supply amount is increased by adjusting the opening of the proportional valve 35. I do. Burning amount is 6,000 Kcal / hr
In the above, the solenoid valve 36 is opened to supply both the fuel gas for the rich combustion and the fuel gas for the lean combustion, and the ratio between the fuel gas supply amount for the rich combustion and the fuel gas supply amount for the lean combustion is adjusted. 1: 3 ~
In the state of 4, the total fuel supply amount is increased by adjusting the opening of the proportional valve 35. Even when the solenoid valve 36 is closed and only the rich combustion is performed, the air from the blower 20 flows through the mixed gas flow path 19 for the lean combustion, so that the burner casing 1 can be cooled.

【００５６】尚、濃燃焼及び淡燃焼の両方を行う場合、
濃燃焼及び淡燃焼を合わせた全体の空気過剰率が１．６
〜１．９程度になるように、濃燃焼吐出手段Ｆｃ、淡燃
焼吐出手段Ｆｒ及び燃料ガス供給部Ｇを構成してあり、
これによって、ＮＯｘの発生量を２２〜２８ｐｐｍ（Ｏ
₂ ＝０％）程度にまで低減することができた。When performing both the rich combustion and the lean combustion,
The total excess air ratio of the rich combustion and the lean combustion is 1.6
The rich combustion discharge means Fc, the light combustion discharge means Fr, and the fuel gas supply unit G are configured so as to be about 1.9.
Thereby, the generation amount of NOx is reduced to 22 to 28 ppm (O
₂ = 0%).

【００５７】次に、図７に基づいて、上述のように構成
した本発明のバーナを搭載した給湯装置について説明す
る。角筒状の外装ケーシング１０１内に、筒胴１０２を
設け、その筒胴１０２内の下方に本発明によるバーナ１
００を設けるとともに、筒胴１０２内の上方にバーナ１
００の燃焼ガスにより加熱される水加熱用の熱交換器１
０３を設けてある。筒胴１０２内にバーナ１００を設け
るに当たっては、筒胴１０２とバーナ１００のバーナケ
ーシング１との間に、間隔を有するようにしてその間隔
を冷却用空気通路１０４とするように構成してある。バ
ーナ１００の送風機２０は、筒胴１０２の下部開口部か
ら空気を供給するように設けて、バーナ１００に対して
燃焼用空気を供給するとともに、冷却用空気通路１０４
に対して冷却用空気を供給するようにしてある。Next, a hot water supply apparatus equipped with the burner of the present invention configured as described above will be described with reference to FIG. A cylindrical body 102 is provided in a rectangular cylindrical outer casing 101, and a burner 1 according to the present invention is provided below the cylindrical body 102.
00 and a burner 1
Heat exchanger 1 for water heating heated by combustion gas of 00
03 is provided. In providing the burner 100 in the cylinder 102, a space is provided between the cylinder 102 and the burner casing 1 of the burner 100 so that the space is used as a cooling air passage 104. The blower 20 of the burner 100 is provided so as to supply air from the lower opening of the cylinder 102, and supplies combustion air to the burner 100 and a cooling air passage 104.
Is supplied to the cooling air.

【００５８】冷却用空気通路１０４を通流する冷却用空
気により、筒胴１０２、熱交換器１０３を冷却するとと
もに、バーナ１００を冷却することができるので、バー
ナ１００の耐久性を一層向上することができる。又、バ
ーナ１００において、燃料ガス供給部Ｇの電磁弁３６を
閉成して、濃燃焼のみを行う場合でも、送風機２０から
の空気が淡燃焼用混合ガス流路１９を通流して淡燃焼用
炎口１３、補助淡燃焼用炎口１４，１５から吐出して、
筒胴１０２の内面に沿って上昇するので、筒胴１０２、
熱交換器１０３を冷却することができる。The cooling air flowing through the cooling air passage 104 can cool the cylinder 102 and the heat exchanger 103 and also cool the burner 100, so that the durability of the burner 100 can be further improved. Can be. Also, in the burner 100, even when the solenoid valve 36 of the fuel gas supply unit G is closed and only the rich combustion is performed, the air from the blower 20 flows through the mixed gas flow path 19 for the lean combustion to perform the lean combustion. It is discharged from the flame port 13 and the flame ports 14 and 15 for auxiliary light combustion,
As it rises along the inner surface of the barrel 102, the barrel 102,
The heat exchanger 103 can be cooled.

【００５９】〔別実施例〕次に別実施例を説明する。 上記実施例では、一対の燃焼部Ｂの夫々に設けられ
た濃燃焼用壁体９の間を区画する仕切り壁体２を設け
て、濃燃焼用壁体９夫々に対して濃燃焼用二次空気流路
１８を設ける場合について例示したが、これに代えて、
仕切り壁体２を設けずに、２枚の混合管Ｍの間を、２枚
の濃燃焼用壁体９共有の濃燃焼用二次空気流路１８とす
るように構成しても良い。[Another Embodiment] Next, another embodiment will be described. In the above embodiment, the partition wall 2 that partitions between the rich combustion walls 9 provided in each of the pair of combustion sections B is provided, and the rich combustion secondary Although the case where the air flow path 18 is provided has been illustrated, instead of this,
The partition wall 2 may be omitted, and the space between the two mixing pipes M may be configured as the rich combustion secondary air flow path 18 shared by the two rich combustion walls 9.

【００６０】 上記実施例では、隔壁体Ｗを設けず
に、混合室３及び燃料ガス供給部１７を隔壁体Ｗとして
機能させる場合について例示したが、これに代えて、隔
壁体Ｗを別途設けてもよい。In the above embodiment, the case where the mixing chamber 3 and the fuel gas supply unit 17 function as the partition wall W without providing the partition wall W has been described as an example, but instead, the partition wall W is separately provided. Is also good.

【００６１】 図７に示すように、２台のバーナケー
シング１を並置し、バーナケーシング１夫々に上記実施
例と同様に単バーナを形成して、バーナを構成してもよ
い。尚、２台のバーナケーシング１に対して、１台の送
風機２０を設ける。この場合、バーナの寸法は、幅１２
０ｍｍ、奥行１５０ｍｍとなり、総燃焼量は３０，００
０Ｋｃａｌ／ｈｒになる。又、３台以上のバーナケーシ
ング１を並置し、バーナケーシング１夫々に上記実施例
と同様に単バーナを形成して、バーナを構成してもよ
い。As shown in FIG. 7, two burner casings 1 may be juxtaposed, and a single burner may be formed on each of the burner casings 1 in the same manner as in the above-described embodiment to form a burner. One blower 20 is provided for two burner casings 1. In this case, the dimensions of the burner are 12
0mm, depth 150mm, the total combustion amount is 30,00
It becomes 0 Kcal / hr. Alternatively, three or more burner casings 1 may be juxtaposed, and a single burner may be formed on each of the burner casings 1 in the same manner as in the above embodiment to form a burner.

【００６２】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施例にかかるバーナの縦断右側面図FIG. 1 is a vertical right side view of a burner according to an embodiment of the present invention.

【図２】図１におけるイ−イ矢視図FIG. 2 is a view taken in the direction of the arrow II in FIG.

【図３】バーナの平面図FIG. 3 is a plan view of a burner.

【図４】バーナの要部の縦断右側面図FIG. 4 is a vertical right side view of a main part of the burner.

【図５】燃焼量と燃料ガス供給量との関係を示す図FIG. 5 is a diagram showing a relationship between a combustion amount and a fuel gas supply amount.

【図６】燃料ガス供給部のブロック図FIG. 6 is a block diagram of a fuel gas supply unit.

【図７】本発明によるバーナを搭載した給湯装置の縦断
右側面図FIG. 7 is a vertical right side view of a water heater equipped with a burner according to the present invention.

【図８】別実施例におけるバーナの縦断右側面図FIG. 8 is a vertical right side view of a burner according to another embodiment.

【図９】従来のバーナの縦断右側面図FIG. 9 is a vertical right side view of a conventional burner.

【図１０】図９におけるロ−ロ矢視図FIG. 10 is a view as seen from the direction of the arrow in FIG. 9;

【符号の説明】[Explanation of symbols]

１Ａ 外装壁体 ２ 仕切り壁体 ３ 混合室 ８ 濃燃焼用炎口 ９ 濃燃焼用壁体 ９Ｓ 濃燃焼用壁面 １０ 淡燃焼用壁体 １０Ｓ 淡燃焼用壁面 １１ 濃燃焼用二次空気吐出口 １３ 淡燃焼用炎口 １７ 淡燃焼用燃料ガス供給手段 １７ｂ 管路 １７ｃ 燃料ガス噴出孔 １８ 濃燃焼用二次空気流路 １９ 淡燃焼用混合ガス流路 ２０ 送風手段 ２２，２３ 多孔板 ２４ａ，２５ａ 流路狭窄体 Ｂ 燃焼部 Ｆ 燃焼ガス流動方向 Ｆｃ 濃燃焼用吐出手段 Ｆｒ 淡燃焼用吐出手段 Ｓ 燃焼空間 Ｗ 隔壁体 Reference Signs List 1A exterior wall 2 partition wall 3 mixing chamber 8 rich combustion flame 9 rich combustion wall 9S rich combustion wall 10 light combustion wall 10S light combustion wall 11 rich combustion secondary air outlet 13 light Flame port for combustion 17 Fuel gas supply means for light combustion 17b Pipe 17c Fuel gas ejection hole 18 Secondary air flow path for rich combustion 19 Mixed gas flow path for light combustion 20 Blowing means 22, 23 Porous plate 24a, 25a Flow path Narrow body B Burning section F Flow direction of combustion gas Fc Discharge means for rich combustion Fr Discharge means for light combustion S Burning space W Partition wall

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.⁷，ＤＢ名) F23D 14/02 - 14/10 F23C 11/00 329 - 330 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F23D 14/02-14/10 F23C 11/00 329-330

Claims (7)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 互いに対向する一対の外装壁体（１Ａ）
の間に、一対の燃焼部（Ｂ）が並置され、 前記一対の燃焼部（Ｂ）の夫々に、濃燃焼用壁体（９）
と淡燃焼用壁体（１０）とが、それらの間に燃焼空間
（Ｓ）を形成するように対向並置させた状態で、且つ、
前記淡燃焼用壁体（１０）を前記外装壁体（１Ａ）側に
位置させた状態で配置され、 前記淡燃焼用壁体（１０）の前記燃焼空間（Ｓ）に対向
する面が、淡燃焼用壁面（１０Ｓ）として構成され、且
つ、前記淡燃焼用壁体（１０）の燃焼ガス流動方向
（Ｆ）の下手側端縁が、燃焼ガス流動方向（Ｆ）におい
て、前記外装壁体（１Ａ）の燃焼ガス流動方向（Ｆ）の
下手側端縁と同じ位置又は略同じ位置に配置され、 前記濃燃焼用壁体（９）の前記燃焼空間（Ｆ）に対向す
る面が、濃燃焼用壁面（９Ｓ）として構成され、且つ、
前記濃燃焼用壁体（９）の燃焼ガス流動方向（Ｆ）の下
手側端縁が、燃焼ガス流動方向（Ｆ）において、前記外
装壁体（１Ａ）の燃焼ガス流動方向（Ｆ）の下手側端縁
よりも燃焼ガス流動方向上手側の位置に配置され、 前記濃燃焼用壁面（９Ｓ）に付着する燃焼炎を形成する
状態で空気過剰率の低い濃燃焼を行うように、燃料ガス
及び燃焼用空気を吐出する濃燃焼用吐出手段（Ｆｃ）
と、前記濃燃焼用壁面（９Ｓ）に付着して燃焼する燃焼
炎を保炎として前記淡燃焼用壁面（１０Ｓ）に付着する
燃焼炎を形成する状態で空気過剰率の高い淡燃焼を行う
ように、燃料ガス及び燃焼用空気を吐出する淡燃焼用吐
出手段（Ｆｒ）とが設けられているバーナ。1. A pair of exterior wall bodies (1A) facing each other.
A pair of combustion sections (B) are juxtaposed between each other, and a wall for rich combustion (9) is provided in each of the pair of combustion sections (B).
And the lean combustion wall (10) are arranged side by side so as to form a combustion space (S) therebetween, and
The light-burning wall (10) is disposed in a state where the light-burning wall (10) is positioned on the exterior wall (1A) side, and a surface of the light-burning wall (10) opposed to the combustion space (S) is light. The lower wall edge of the lean combustion wall body (10) is configured as a combustion wall surface (10S), and the lower edge of the lean combustion wall body (10) in the combustion gas flow direction (F) is in the combustion gas flow direction (F). 1A) is disposed at the same position or substantially the same position as the lower edge of the combustion gas flow direction (F), and the surface of the rich combustion wall (9) facing the combustion space (F) is rich combustion. Wall (9S), and
The lower side edge of the combustion gas flow direction (F) of the rich combustion wall body (9) is located below the combustion gas flow direction (F) of the exterior wall body (1A) in the combustion gas flow direction (F). The fuel gas and the fuel gas are disposed at a position on the upper side of the side edge in the combustion gas flow direction so as to perform rich combustion with a low excess air ratio in a state in which a combustion flame adhered to the rich combustion wall surface (9S) is formed. Discharge means for rich combustion for discharging combustion air (Fc)
Then, the combustion flame adhering to the rich combustion wall surface (9S) is used as flame holding to form the combustion flame adhering to the light combustion wall surface (10S), and the light combustion with a high excess air ratio is performed. And a light combustion discharge means (Fr) for discharging fuel gas and combustion air. 【請求項２】 前記濃燃焼用吐出手段（Ｆｃ）は、 前記濃燃焼用壁体（９）の燃焼ガス流動方向（Ｆ）の上
手側端縁に間隔を隔てて並設されて、燃料ガスと燃焼用
空気との混合ガスを前記濃燃焼用壁面（９Ｓ）に沿わせ
て吐出する複数個の濃燃焼用炎口（８）と、 隣接する前記濃燃焼用炎口（８）の間に対応する位置か
ら前記濃燃焼用炎口（８）からの混合ガス吐出方向に延
びるスリット状に前記濃燃焼用壁体（９）に形成され
て、濃燃焼用二次空気を前記燃焼空間（Ｓ）に向けて吐
出する濃燃焼用二次空気吐出口（１１）を備えて構成さ
れ、 前記淡燃焼用吐出手段（Ｆｒ）は、 前記濃燃焼用二次空気吐出口（１１）と同方向に延びる
スリット状に、且つ、前記濃燃焼用炎口（８）の並設方
向に間隔を隔てた状態で前記淡燃焼用壁体（１０）に形
成されて、燃料ガスと燃焼用空気との混合ガスを前記燃
焼空間（Ｓ）内に向けて吐出する複数個の淡燃焼用炎口
（１３）を備えて構成されている請求項１記載のバー
ナ。2. The discharge means (Fc) for rich combustion is arranged in parallel with the upper edge of the rich combustion wall (9) in the combustion gas flow direction (F) at an interval, and is provided with fuel gas. Between a plurality of rich combustion ports (8) for discharging a mixed gas of air and combustion air along the rich combustion wall surface (9S), and between the adjacent rich combustion ports (8). The rich combustion wall (9) is formed in a slit shape extending from the corresponding position in the direction of discharging the mixed gas from the rich combustion flame port (8), and the rich combustion secondary air is supplied to the combustion space (S). ), Which is provided with a secondary air discharge port for rich combustion (11) that discharges toward the secondary combustion chamber. The discharge means for light combustion (Fr) is arranged in the same direction as the secondary air discharge port for rich combustion (11). The light combustion wall (10) is formed in a slit shape extending and spaced apart in the direction in which the rich combustion flame openings (8) are juxtaposed. And a plurality of light combustion flame openings (13) for discharging a mixed gas of fuel gas and combustion air into the combustion space (S). Burner. 【請求項３】 前記一対の燃焼部（Ｂ）の夫々に設けら
れた前記濃燃焼用壁体（９）の間を区画する仕切り壁体
（２）が、前記濃燃焼用壁体（９）の燃焼ガス流動方向
（Ｆ）の上手側端縁及び前記淡燃焼用壁体（１０）の燃
焼ガス流動方向（Ｆ）の上手側端縁よりも燃焼ガス流動
方向上手側へ延びる状態で設けられ、 その仕切り壁体（２）と前記外装壁体（１Ａ）との間を
区画する隔壁体（Ｗ）が、前記濃燃焼用壁体（９）の燃
焼ガス流動方向（Ｆ）の上手側端縁又は前記淡燃焼用壁
体（１０）の燃焼ガス流動方向（Ｆ）の上手側端縁か
ら、燃焼ガス流動方向上手側へ延びる状態で設けられ、 前記外装壁体（１Ａ）と前記隔壁体（Ｗ）との間を、前
記淡燃焼用炎口（１３）に混合ガスを送る淡燃焼用混合
ガス流路（１９）とし、且つ、前記隔壁体（Ｗ）と前記
仕切り壁体（２）との間を、前記濃燃焼用二次空気吐出
口（１１）に濃燃焼用二次空気を送る濃燃焼用二次空気
流路（１８）とするように構成され、 前記淡燃焼用混合ガス流路（１９）に燃料ガスを供給す
る淡燃焼用燃料ガス供給手段（１７）と、前記一対の燃
焼部（Ｂ）夫々の前記濃燃焼用二次空気流路（１８）及
び前記淡燃焼用混合ガス流路（１９）に燃焼用空気を供
給する送風手段（２０）が設けられている請求項２記載
のバーナ。3. A partition wall (2) for partitioning between said rich combustion walls (9) provided in each of said pair of combustion sections (B), said rich combustion wall (9). Of the combustion gas flow direction (F) and the upper edge of the lean combustion wall (10) in the combustion gas flow direction (F). The partition wall (W) for partitioning between the partition wall (2) and the exterior wall (1A) is formed on the upper end of the rich combustion wall (9) in the combustion gas flow direction (F). The exterior wall (1A) and the partition are provided so as to extend from the edge or the upper edge of the lean combustion wall (10) in the combustion gas flow direction (F) to the upper side in the combustion gas flow direction. (W) is a mixed gas flow path for light combustion (19) for sending a mixed gas to the flame opening for light combustion (13); A rich combustion secondary air flow path (18) for sending rich combustion secondary air to the rich combustion secondary air discharge port (11) between the body (W) and the partition wall body (2). A lean combustion fuel gas supply means (17) for supplying a fuel gas to the lean combustion mixed gas flow path (19), and the rich combustion fuel gas supply means (17) for each of the pair of combustion sections (B). The burner according to claim 2, wherein a blower (20) for supplying combustion air is provided in the secondary air flow path (18) and the mixed gas flow path for lean combustion. 【請求項４】 燃料ガスと燃焼用空気とを混合して混合
ガスを生成し、その混合ガスを前記濃燃焼用炎口（８）
に供給する混合室（３）が、前記濃燃焼用壁体（９）の
燃焼ガス流動方向（Ｆ）の上手側端縁から燃焼ガス流動
方向上手側へ延びる状態で設けられ、 前記淡燃焼用燃料ガス供給手段（１７）が、前記混合室
（３）の燃焼ガス流動方向（Ｆ）の上手側端縁から燃焼
ガス流動方向上手側へ延びる状態で設けられ、 前記混合室（３）及び前記淡燃焼用燃料ガス供給手段
（１７）を前記隔壁体（Ｗ）として機能させるように構
成されている請求項３記載のバーナ。4. A mixed gas is produced by mixing fuel gas and combustion air, and the mixed gas is mixed with the rich combustion flame port (8).
A mixing chamber (3) is provided so as to extend from the upper edge of the rich combustion wall (9) in the combustion gas flow direction (F) to the upper side in the combustion gas flow direction. Fuel gas supply means (17) is provided so as to extend from the upper edge of the mixing gas flow direction (F) of the mixing chamber (3) toward the upper combustion gas flow direction; 4. The burner according to claim 3, wherein the fuel gas supply means for lean combustion is configured to function as the partition wall. 【請求項５】 前記外装壁体（１Ａ）に向かって突出す
る状態で前記隔壁体（Ｗ）に取り付けられた流路狭窄体
（２５ａ）と、前記隔壁体（Ｗ）に向かって突出する状
態で前記外装壁体（１Ａ）に取り付けられた流路狭窄体
（２４ａ）とが、燃焼ガス流動方向（Ｆ）に沿って互い
違いに配置されている請求項３又は４記載のバーナ。5. A flow path narrowing body (25a) attached to the partition (W) in a state protruding toward the exterior wall (1A), and a state protruding toward the partition (W). The burner according to claim 3 or 4, wherein the narrowed flow passages (24a) attached to the exterior wall (1A) are alternately arranged along the combustion gas flow direction (F). 【請求項６】 前記淡燃焼用混合ガス流路（１９）にお
ける空気供給口に設けられた整流用の多孔板（２２）の
開口面積が、前記濃燃焼用二次空気流路（１８）におけ
る空気供給口に設けられた整流用の多孔板（２３）の開
口面積よりも大になるように構成され、且つ、 前記淡
燃焼用混合ガス流路（１９）における流路横断面積が、
前記濃燃焼用二次空気流路（１８）における流路横断面
積よりも大になるように構成されている請求項３、４又
は５記載のバーナ。6. The opening area of a rectifying perforated plate (22) provided at an air supply port in the mixed gas flow path for lean combustion (19) is smaller than the opening area of the secondary air flow path for rich combustion (18). It is configured to be larger than the opening area of the rectifying perforated plate (23) provided at the air supply port, and the cross-sectional area of the lean combustion mixed gas flow path (19) is:
The burner according to claim 3, 4 or 5, wherein the burner is configured to be larger than a cross-sectional area of the secondary air flow path for rich combustion (18). 【請求項７】 前記淡燃焼用燃料ガス供給手段（１７）
が、終端部が閉塞し且つ前記濃燃焼用炎口（８）の並設
方向に往復する管路（１７ｂ）と、その管路（１７ｂ）
における復路部に前記並設方向に沿って間隔を隔てて形
成された複数の燃料ガス噴出孔（１７ｃ）を備えて構成
されている請求項３、４、５又は６記載のバーナ。7. The fuel gas supply means for lean combustion (17).
A pipe (17b) having a closed end and reciprocating in the direction of juxtaposition of the rich combustion flame (8), and the pipe (17b).
7. The burner according to claim 3, further comprising a plurality of fuel gas ejection holes (17c) formed at intervals in the juxtaposed direction in the return path.