JP4947340B2 - Two-stage combustion device - Google Patents

Two-stage combustion device Download PDF

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JP4947340B2
JP4947340B2 JP2006021556A JP2006021556A JP4947340B2 JP 4947340 B2 JP4947340 B2 JP 4947340B2 JP 2006021556 A JP2006021556 A JP 2006021556A JP 2006021556 A JP2006021556 A JP 2006021556A JP 4947340 B2 JP4947340 B2 JP 4947340B2
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flow path
air
air flow
opening
flame hole
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JP2007205583A (en
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政彦 嶋津
武志 若田
逸夫 永井
林 謝
敬 長谷川
隆 秋山
孝史 若竹
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Noritz Corp
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Description

本発明は、燃焼装置に関するものであり、特に給湯器や風呂装置に採用することが推奨される燃焼装置に関するものである。   The present invention relates to a combustion apparatus, and more particularly to a combustion apparatus recommended for use in a water heater or a bath apparatus.

燃焼装置は、給湯器や風呂装置の主要な構成部品であり、工場はもとより一般家庭においても広く普及している。
ところで近年、酸性雨による環境破壊が深刻な社会問題となり、NOx(窒素酸化物)の総排出量を減少させることが急務となっている。
給湯装置の様な小型の装置に採用可能であり、かつNOxの発生量を抑制することができる構成として濃淡燃焼法と称される燃焼方式を採用した燃焼装置がある。
濃淡燃焼法とは、燃料ガスに理論空気量の1.6倍程度の空気を予混合した希薄な混合ガスから主炎を発生させ、この主炎の近辺に、空気の混合量が少なく燃料ガス濃度が高い混合ガスから発生する保炎を配置したものである。
濃淡燃焼を応用した燃焼装置には、例えば特許文献1,2に開示された様な構成が知られている。
Combustion devices are main components of water heaters and bath devices, and are widely used not only in factories but also in general households.
In recent years, environmental destruction caused by acid rain has become a serious social problem, and there is an urgent need to reduce the total amount of NOx (nitrogen oxide) emissions.
There is a combustion apparatus that employs a combustion method called a concentration combustion method as a configuration that can be employed in a small device such as a hot water supply device and that can suppress the amount of NOx generated.
In the lean combustion method, the main flame is generated from a dilute gas mixture that is premixed with about 1.6 times the theoretical air volume in the fuel gas, and there is little air mixing in the vicinity of the main flame. A flame holder generated from a mixed gas having a high concentration is arranged.
For example, Patent Documents 1 and 2 disclose a combustion apparatus that uses light and shade combustion.

またNOxの発生量が少ない燃焼方式には他に二段燃焼法と称される燃焼形式がある。二段燃焼法とは、酸素不足の状態で燃料ガスを噴射し、当該ガスに点火して一次火炎を発生させ、未燃ガスに二次空気を供給して二次火炎を発生させる燃焼形式である。
二段燃焼法を採用した燃焼装置は、特許文献3に開示されている。
特開平5−118516号公報 特開平6−126788号公報 特開昭52−143524号公報
In addition, there is another combustion method called a two-stage combustion method as a combustion method that generates little NOx. The two-stage combustion method is a combustion type in which fuel gas is injected in a state where oxygen is insufficient, the gas is ignited to generate a primary flame, and secondary air is supplied to unburned gas to generate a secondary flame. is there.
A combustion apparatus employing a two-stage combustion method is disclosed in Patent Document 3.
Japanese Patent Laid-Open No. 5-118516 JP-A-6-126788 JP-A-52-143524

濃淡燃焼法を採用した燃焼装置は、NOxの発生量が少なく、市場において好評であるが、ターンダウン比(Turn Down Ratio T.D.R.)が小さいという欠点がある。特に濃淡燃焼法を採用した燃焼装置は、発熱量の小さい領域で燃焼させにくいという欠点がある。
即ち濃淡燃焼法では、前記した様に燃料ガスに理論空気量の1.6倍程度の空気を予混合した希薄な混合ガスから主炎を発生させる。この混合ガスは、希薄であるがために燃焼速度が遅い。
A combustion apparatus that employs the lean combustion method has a small amount of NOx generated and is well-received in the market, but has a drawback of a small turn-down ratio (Turn Down Ratio TDR). In particular, a combustion apparatus that employs the light and dark combustion method has a drawback that it is difficult to burn in a region where the calorific value is small.
That is, in the lean combustion method, as described above, the main flame is generated from a lean mixed gas obtained by premixing the fuel gas with about 1.6 times the theoretical air amount. Although this mixed gas is lean, its combustion speed is slow.

ところで濃淡燃焼法を採用する燃焼装置は、希薄な混合ガスを生成するために送風機を備えるが、送風機を長年に渡って使用し、送風機が老朽化すると次第に送風量が減少する。フィルターの目詰まりによって送風量が減少する場合もある。この様に経年変化によって送風量が減少すると、主炎を形成させる混合ガスの空気量が減少傾向となり、混合される空気量が理論空気量に近づく。その結果、主炎の燃焼速度が経年変化によって早まる傾向となり、経年変化によって火炎の基端部がしだいに炎孔に近づく傾向となる。そのため発熱量の小さい領域で燃焼させると火炎の基端部が炎孔に近接し、炎孔を傷めてしまう。そのため濃淡燃焼法を採用した燃焼装置は、経年変化を見越して発熱量の小さい領域での燃焼を制限せざるを得ない。   By the way, the combustion apparatus which employs the light and dark combustion method includes a blower for generating a lean mixed gas. However, the blower has been used for many years, and the amount of blown air gradually decreases as the blower ages. The amount of air flow may be reduced due to clogging of the filter. Thus, when the amount of blast decreases due to secular change, the amount of air of the mixed gas that forms the main flame tends to decrease, and the amount of air to be mixed approaches the theoretical amount of air. As a result, the combustion speed of the main flame tends to be accelerated by secular change, and the base end portion of the flame gradually approaches the flame hole due to secular change. Therefore, when burning in a region where the heat generation amount is small, the base end portion of the flame approaches the flame hole and damages the flame hole. Therefore, a combustion apparatus that employs the light and dark combustion method must limit combustion in a region where the calorific value is small in anticipation of secular change.

加えて、濃淡燃焼法は、使用可能なガスの範囲が狭いという不満がある。即ちガスメーカが供給する燃料ガスは単一の成分だけで構成されている場合もあるが、多くの場合、複数成分の燃料ガスが混在している。そのためたとえ発生する熱量(単位体積あたりの熱量)が同一であったとしても燃焼速度は燃料ガスのメーカごとに相違する。
これに対して濃淡燃焼法は、主炎を空気過剰状態で燃焼させるため、燃焼速度が遅い燃料ガスは火飛びが生じ、安定して燃焼させることができない。
In addition, the lean combustion method is unsatisfactory because the range of usable gases is narrow. That is, the fuel gas supplied by the gas manufacturer may be composed of only a single component, but in many cases, a fuel gas of a plurality of components is mixed. For this reason, even if the amount of heat generated (the amount of heat per unit volume) is the same, the combustion rate differs for each fuel gas manufacturer.
On the other hand, in the light / dark combustion method, the main flame is burned in an excess air state, so that the fuel gas having a low combustion speed is burned out and cannot be burned stably.

一方、二段燃焼法を採用する場合は、濃淡燃焼法を採用する場合に比べてターンダウン比を高くとることができる。また適用可能な燃料ガスの種類も幅広い。しかしながら二段燃焼法は、燃料ガスを酸素不足の状態で燃焼させるために燃焼状態が不安定である。そのため市販された実用的な給湯器等に二段燃焼法を採用したものはない。   On the other hand, when the two-stage combustion method is employed, the turndown ratio can be increased as compared with the case where the concentration combustion method is employed. There are also a wide variety of applicable fuel gases. However, in the two-stage combustion method, the combustion state is unstable because the fuel gas is burned in a state where oxygen is insufficient. For this reason, there are no commercially available hot water heaters that employ the two-stage combustion method.

そこで本発明は従来技術の上記した問題点に注目し、二段燃焼を行う燃焼装置を改良し、安定した一次火炎が発生する燃焼装置の開発を課題とするものある。 The present invention focuses on the above-mentioned problems of the prior art, in which an improved combustion apparatus for performing two-stage combustion, an object of the development of the combustion device a stable primary flame is generated.

上記した課題を解決するための請求項1に記載の発明は、炎孔部材と、空気流路部材とを備え、前記空気流路部材は壁状であって先端側に空気放出開口を有し、炎孔部材は二枚の空気流路部材の間或いは前記空気流路部材と他の壁面との間に配置され、炎孔部材と空気流路部材によって囲まれた空間によって第一燃焼部が形成され、酸素不足の状態の燃料ガスが炎孔部材から第一燃焼部に放出されて燃焼し、さらに空気流路部材の空気放出開口から空気の供給を受けて燃焼する二段燃焼装置であって、前記空気流路部材は、基端部から高さ方向先端側に向かって、導入部と、中間部と、第一燃焼部構成部と、の領域に分かれており、導入部と中間部との境界近傍に上流側空気放出開口が設けられており、炎孔部材の側面側に別途空気が供給されるものであり、空気流路部材の少なくとも一方の壁面であって且つ中間部に、空気の流れ方向に対して平行に向いた凸条が形成されており、前記凸条は、炎孔部材の外面と当接して両者の間に隙間を設けるものであり、前記隙間に上流側空気放出開口から供給された空気が流れるものであることを特徴とする二段燃焼装置である。 The invention according to claim 1 for solving the above-described problem includes a flame hole member and an air flow path member, and the air flow path member has a wall shape and has an air discharge opening on the tip side. The flame hole member is disposed between the two air flow path members or between the air flow path member and another wall surface, and the first combustion portion is formed by a space surrounded by the flame hole member and the air flow path member. This is a two-stage combustion device in which the formed fuel gas in an oxygen-deficient state is discharged from the flame hole member to the first combustion part and burns, and further receives the supply of air from the air discharge opening of the air flow path member and burns. The air flow path member is divided into regions of an introduction portion, an intermediate portion, and a first combustion portion constituting portion from the base end portion toward the front end in the height direction, and the introduction portion and the intermediate portion and the upstream-side air discharge opening is provided near the boundary, separate air side of the burner port member supply of the A shall, on and an intermediate portion and at least one of the walls of the air passage member are oriented parallel to the ridges are formed with respect to the flow direction of the air, the convex Article, the burner port member The two-stage combustion apparatus is characterized in that a gap is provided between the two in contact with the outer surface, and the air supplied from the upstream air discharge opening flows in the gap .

本発明の二段燃焼装置は、酸素不足状態の燃料ガスが炎孔部材から第一燃焼部に放出されて燃焼し、さらに空気流路部材の空気放出開口から空気の供給を受けて燃焼するものであり、二段燃焼を行うものである。
そして本発明の二段燃焼装置では、炎孔部材の側面側に別途空気が供給される。そのため炎孔部材の側面部に安定した火炎が発生し、一次火炎の基端部を保持する。その結果、一次火炎が安定する。
In the two-stage combustion apparatus of the present invention, the oxygen-deficient fuel gas is discharged from the flame hole member to the first combustion portion and burned, and further burned by receiving supply of air from the air discharge opening of the air flow path member And performs two-stage combustion.
And in the two-stage combustion apparatus of this invention, air is separately supplied to the side surface side of a flame hole member. Therefore, a stable flame is generated on the side surface portion of the flame hole member, and the base end portion of the primary flame is held. As a result, the primary flame is stabilized.

請求項2に記載の発明は、炎孔部材と、二以上の空気流路部材とを備え、前記空気流路部材は壁状であって先端側に空気放出開口を有し、炎孔部材は前記空気流路部材の間に配置され、炎孔部材と空気流路部材によって囲まれた空間によって第一燃焼部が形成され、酸素不足の状態の燃料ガスが炎孔部材から第一燃焼部に放出されて燃焼し、さらに空気流路部材の空気放出開口から空気の供給を受けて燃焼する二段燃焼装置であって、空気流路部材の第一燃焼部を構成する部位又はそれよりも上流側に上流側空気放出開口が設けられ、当該上流側空気放出開口から放出された空気が炎孔部材の側面側に流れるものであり、空気流路部材の少なくとも一方の壁面に、空気の流れ方向に対して平行に向いた凸条が形成されており、前記凸条は、炎孔部材の外面と当接して両者の間に隙間を設けるものであり、前記隙間に上流側空気放出開口から供給された空気が流れるものであることを特徴とする二段燃焼装置である。 The invention according to claim 2 includes a flame hole member and two or more air flow path members, and the air flow path member has a wall shape and has an air discharge opening at a tip end side. A first combustion part is formed by a space disposed between the air flow path member and surrounded by the flame hole member and the air flow path member, and oxygen-deficient fuel gas is transferred from the flame hole member to the first combustion part. A two-stage combustion apparatus that is discharged and combusted, and further combusts by receiving air supply from an air discharge opening of the air flow path member, and is a part constituting the first combustion portion of the air flow path member or upstream of the part upstream air discharge opening is provided on the side, a flow shall air discharged from the upstream side air discharge opening on the side surface side of the burner port member, at least one of the walls of the air passage member, the air flow A ridge that is parallel to the direction is formed, and the ridge is a flame. Are those with an outer surface of the member and abutting a gap is provided therebetween, a two-stage combustion apparatus, wherein the one in which a gap through which air supplied from the upstream side air discharge opening to.

本発明の二段燃焼装置についても酸素不足状態の燃料ガスが炎孔部材から第一燃焼部に放出されて燃焼し、さらに空気流路部材の空気放出開口から空気の供給を受けて燃焼するものであり、二段燃焼を行うものである。
そして本発明の二段燃焼装置では、空気流路部材の第一燃焼部を構成する部位又はそれよりも上流側にも上流側空気放出開口が設けられ、この上流側空気放出開口から放出された空気が炎孔部材の側面側に流れる。
そのため炎孔部材の側面部に安定した火炎が発生し、一次火炎の基端部を保持する。その結果、一次火炎が安定する。
Also in the two-stage combustion apparatus of the present invention, oxygen-deficient fuel gas is discharged from the flame hole member to the first combustion portion and burned, and further burned by receiving air supply from the air discharge opening of the air flow path member And performs two-stage combustion.
In the two-stage combustion apparatus of the present invention, an upstream air discharge opening is also provided at a portion constituting the first combustion portion of the air flow path member or at an upstream side thereof, and discharged from the upstream air discharge opening. Air flows to the side of the flame hole member.
Therefore, a stable flame is generated on the side surface portion of the flame hole member, and the base end portion of the primary flame is held. As a result, the primary flame is stabilized.

請求項3に記載の発明は、炎孔部材は中央側開口と側面側開口とを有し、側面側開口から放出される燃料ガスの流速は中央側開口から放出される燃料ガスの流速よりも遅いことを特徴とする請求項1又は2に記載の二段燃焼装置である。 According to a third aspect of the present invention, the flame hole member has a center side opening and a side opening, and the flow rate of the fuel gas discharged from the side opening is higher than the flow rate of the fuel gas discharged from the center opening. The two-stage combustion apparatus according to claim 1, wherein the two-stage combustion apparatus is slow.

本構成は、主たる一次火炎を発生させる炎孔と、保炎を目的とした火炎を発生させる炎孔とを明確に分けたものである。
即ち上記した構成では、側面側開口から放出される燃料ガスの流速は中央側開口から放出される燃料ガスの流速よりも遅いので、側面側開口に発生する火炎は火飛びが少ない。さらに側面側開口の近傍に空気が供給されるので側面側開口から放出される燃料ガスは完全燃焼に近い状態で安定して燃焼し、一次火炎の基端部を保持する。その結果、一次火炎が安定する。
This configuration clearly divides a flame hole that generates a main primary flame and a flame hole that generates a flame for the purpose of flame holding.
That is, in the above-described configuration, the flow rate of the fuel gas discharged from the side opening is slower than the flow rate of the fuel gas discharged from the center opening, so that the flame generated in the side opening has less fire. Further, since air is supplied in the vicinity of the side opening, the fuel gas released from the side opening is stably burned in a state close to complete combustion, and holds the base end portion of the primary flame. As a result, the primary flame is stabilized.

請求項4に記載の発明は、炎孔部材は本体部と本体部の側面に設けられた減圧壁によって構成され、本体部の側面と減圧壁との間に空隙が設けられて側面側開口が構成されていることを特徴とする請求項3に記載の二段燃焼装置である。 According to a fourth aspect of the present invention, the flame hole member is constituted by a main body part and a decompression wall provided on a side surface of the main body part, and a gap is provided between the side surface of the main body part and the decompression wall so that the side opening is provided. It is comprised, The two-stage combustion apparatus of Claim 3 characterized by the above-mentioned.

上記した構成では、減圧壁によって構成される空隙に本体部に設けられた開口から燃料ガスが流れ込むが、燃料ガス(正確には空気と予混合された燃料ガス)の量は開口によって制限されるので、側面側開口から放出される燃料ガスの流速は、他の部位から放出される燃料ガスの流速よりも遅くなる。   In the above configuration, the fuel gas flows into the gap formed by the decompression wall from the opening provided in the main body, but the amount of the fuel gas (precisely, the fuel gas premixed with air) is limited by the opening. Therefore, the flow rate of the fuel gas released from the side opening is slower than the flow rate of the fuel gas released from other portions.

請求項5に記載の発明は、空気流路部材の少なくとも一方の第一燃焼部を構成する壁面に、凸条又は凹溝が形成されていることを特徴とする請求項1乃至4のいずれかに記載の二段燃焼装置である。 The invention according to claim 5 is characterized in that a ridge or a groove is formed on a wall surface constituting at least one first combustion portion of the air flow path member. Is a two-stage combustion apparatus.

本発明では空気流路部材が第一燃焼部の壁面を構成するので高熱にさらされるが、第一燃焼部を構成する壁面に、凸条又は凹溝が形成されているので剛性が高く、変形しにくい。   In the present invention, since the air flow path member constitutes the wall surface of the first combustion part, it is exposed to high heat. However, the wall surface constituting the first combustion part is formed with ridges or grooves, so that it has high rigidity and is deformed. Hard to do.

請求項6に記載の発明は、空気流路部材の少なくとも一方には、第一燃焼部を構成する壁面に炎孔部材側から外側方向に伸びるスリットが複数列設けられ、空気流路部材の長手方向端部近傍においては前記スリットの長さが中央部のそれに比べて長いことを特徴とする請求項1乃至5のいずれかに記載の二段燃焼装置である。 In the invention according to claim 6, at least one of the air flow path members is provided with a plurality of rows of slits extending outward from the flame hole member side on the wall surface constituting the first combustion section, and the longitudinal direction of the air flow path member 6. The two-stage combustion apparatus according to claim 1, wherein a length of the slit is longer in the vicinity of the end portion in the direction than that in the central portion.

本発明の二段燃焼装置では、空気流路部材の第一燃焼部を構成する壁面に炎孔部材側から外側方向に伸びるスリットが複数列設けられている。そのため空気流路部材から第一燃焼部に空気が供給される。ここで第一燃焼部は一次火炎を発生させる部位であり、先端空気放出開口から供給される空気によって第一燃焼部外に二次火炎を発生させるが、第一燃焼部に燃焼部向空気放出開口から空気を供給すると、二次火炎が早期に発生し、一次火炎と二次火炎との総長を短くすることができる。 In the two-stage combustion apparatus of the present invention, a plurality of rows of slits extending outward from the flame hole member side are provided on the wall surface constituting the first combustion portion of the air flow path member. Therefore, air is supplied from the air flow path member to the first combustion part. Here, the first combustion part is a part that generates a primary flame, and a secondary flame is generated outside the first combustion part by the air supplied from the tip air discharge opening, but the first combustion part releases air to the combustion part. When air is supplied from the opening, the secondary flame is generated early, and the total length of the primary flame and the secondary flame can be shortened.

請求項7に記載の発明は、炎孔部材は燃料ガスを放出する開口を有し、空気流路部材の先端側に設けられた空気放出開口は、前記燃料ガスを放出する開口の延長線に対応する位置に設けられていることを特徴とする請求項1乃至6のいずれかに記載の二段燃焼装置である。 According to a seventh aspect of the present invention, the flame hole member has an opening for releasing the fuel gas, and the air discharge opening provided on the tip side of the air flow path member is an extension line of the opening for discharging the fuel gas. The two-stage combustion apparatus according to any one of claims 1 to 6, wherein the two-stage combustion apparatus is provided at a corresponding position.

本発明によると、炎孔部材は燃料ガスを放出する開口を有し、当該開口から放出される燃料ガスが燃焼して一次火炎が発生する。そして未燃成分が下流に流れて二次燃焼するが、本発明では、空気流路部材の先端側に設けられた空気放出開口は、前記燃料ガスを放出する開口の延長線に対応する位置に設けられているから、未燃成分に対して効率良く二次空気が供給される。   According to the present invention, the flame hole member has an opening through which fuel gas is released, and the fuel gas released from the opening burns to generate a primary flame. The unburned component flows downstream and undergoes secondary combustion. In the present invention, the air discharge opening provided on the front end side of the air flow path member is located at a position corresponding to the extended line of the opening for discharging the fuel gas. Since it is provided, secondary air is efficiently supplied to the unburned components.

請求項8に記載の発明は、空気流路部材は表板と裏板とを有し、両者の間に空気流路となる空隙を形成するものであり、前記表板又は裏板の少なくとも一方に内面側に向かって凹変した凹変部を有し、当該凹変部の正面形状は、流線型であることを特徴とする請求項1乃至7のいずれかに記載の二段燃焼装置である。 According to an eighth aspect of the present invention, the air flow path member has a front plate and a back plate, and a gap serving as an air flow path is formed between them, and at least one of the front plate or the back plate 8. The two-stage combustion apparatus according to claim 1, further comprising: a concavely deformed portion that is concaved toward the inner surface side, wherein the frontal shape of the concavely deformed portion is a streamlined type. .

本発明の二段燃焼装置では、空気流路部材の表板又は裏板の少なくとも一方に内面側に向かって凹変した凹変部を有する。しかしながらこの凹変部の正面形状は、流線型であるから、流路抵抗となりにくい。 In the two-stage combustion apparatus of the present invention, at least one of the front plate or the back plate of the air flow path member has a concave change portion that is concave toward the inner surface side. However, since the front shape of the concave change part is a streamline type, it is difficult to become a flow path resistance.

請求項9に記載の発明は、空気流路部材の先端は鋭角の稜線状であることを特徴とする請求項1乃至8のいずれかに記載の二段燃焼装置である。 The invention according to claim 9 is the two-stage combustion apparatus according to any one of claims 1 to 8, wherein the tip of the air flow path member has an acute ridge shape.

本発明の二段燃焼装置では、空気流路部材の先端が鋭角の稜線状である。ここで空気流路部材の先端側には空気放出開口があり、二次空気を供給するが、本発明では空気流路部材の先端が鋭角の稜線状であるから空気流路部材内における空気の回り込みが少ない。そのため空気の放出方向が安定する。 In the two-stage combustion apparatus of the present invention, the tip of the air channel member has an acute ridgeline shape. Here, there is an air discharge opening on the front end side of the air flow path member, and the secondary air is supplied. However, in the present invention, since the front end of the air flow path member has an acute ridge shape, the air flow in the air flow path member is reduced. There is little wraparound. Therefore, the air discharge direction is stabilized.

請求項10に記載の発明は、空気流路部材の表面の一部は炎孔部材の側面と略平行状態に面してその間に空気流路を形成し、空気流路部材の内面における部位はその上流側の部位と連続的な平面で連続していることを特徴とする請求項1乃至9のいずれかに記載の二段燃焼装置である。 In a tenth aspect of the present invention, a part of the surface of the air flow path member faces substantially in parallel with the side surface of the flame hole member to form an air flow path therebetween. The two-stage combustion apparatus according to any one of claims 1 to 9, wherein the two-stage combustion apparatus is continuous with a portion of the upstream side in a continuous plane.

本発明によると、空気流路部材の内面が比較的平滑であるから空気流路部材の内部で渦が生じにくく、二次空気の放出方向等が安定する。   According to the present invention, since the inner surface of the air flow path member is relatively smooth, vortices are not easily generated inside the air flow path member, and the secondary air discharge direction and the like are stabilized.

本発明の二段燃焼装置は、主たる一次火炎の近傍に安定した保炎が発生し、主たる一次火炎が安定する。そのため火飛びが少なく実用的である。また本発明の二段燃焼装置は、窒素酸化物の発生が少なく、且つターンダウン比を高く設定することができる。さらに本発明の燃焼装置は、燃焼ガスの燃焼速度に対する適応が広く、ガスの種類を選ばない。 In the two-stage combustion apparatus of the present invention, stable flame holding is generated in the vicinity of the main primary flame, and the main primary flame is stabilized. For this reason, it is practical with less fire. In addition, the two-stage combustion apparatus of the present invention can reduce the generation of nitrogen oxides and set the turndown ratio high. Furthermore, the combustion apparatus of the present invention is widely applicable to the combustion rate of the combustion gas, and does not select the type of gas.

以下、本発明の実施例について説明する。最初に、本発明の概略構成と基本的な機能を図1の模式図を参照しつつ説明する。図1の実施例は、本発明を概念的に説明するものである。
以下の説明において、上下の関係は、燃焼装置1を縦置きして上部側に火炎を発生させる姿勢を基準とする。また上流側、下流側の表現は、空気又は燃料ガスの流れを基準としている。幅方向とは、燃焼装置の最も大きい面積を正面として左右方向に相当する方向(図面の矢印W方向)である。
Examples of the present invention will be described below. First, the schematic configuration and basic functions of the present invention will be described with reference to the schematic diagram of FIG. The embodiment of FIG. 1 conceptually illustrates the present invention.
In the following description, the vertical relationship is based on the posture in which the combustion apparatus 1 is placed vertically and a flame is generated on the upper side. The expressions on the upstream side and the downstream side are based on the flow of air or fuel gas. The width direction is a direction (in the direction of arrow W in the drawing) corresponding to the left-right direction with the largest area of the combustion device as the front.

本実施例の燃焼装置1は、ケースに並列に並べて使用されたり、単独で使用されるものである。本実施例の燃焼装置1は、予混合部材2と、炎孔部材3と、二つの空気流路部材5とを有する。本実施例の燃焼装置1では、予混合部材2と、炎孔部材3とが嵌合しあって一つ中間部材6を構成し、この中間部材6が二つの空気流路部材5の間に挟まった構成となっているが、実際に使用される場合には、空気流路部材5、中間部材6、空気流路部材5、中間部材6、空気流路部材5・・・と言ったように予混合部材2と中間部材6とが交互に配置されて面状をなしている。   The combustion apparatus 1 of a present Example is used in parallel with a case, or is used independently. The combustion apparatus 1 of the present embodiment includes a premixing member 2, a flame hole member 3, and two air flow path members 5. In the combustion apparatus 1 of the present embodiment, the premixing member 2 and the flame hole member 3 are fitted together to form one intermediate member 6, and the intermediate member 6 is interposed between the two air flow path members 5. Although the structure is sandwiched, when actually used, the air flow path member 5, the intermediate member 6, the air flow path member 5, the intermediate member 6, the air flow path member 5. The premixing members 2 and the intermediate members 6 are alternately arranged to form a surface.

燃焼装置1の構成部材たる予混合部材2は、内部で燃料ガスと空気とを予混合する機能を果たす部材である。予混合部材2は、曲路を有する混合部7と、開口8が列状に設けられた開口列部10を備える。開口列部10は、断面が略四角形をした空洞が長く直線的に延びた部位である。   The premixing member 2 that is a constituent member of the combustion apparatus 1 is a member that performs a function of premixing fuel gas and air inside. The premixing member 2 includes a mixing portion 7 having a curved path and an opening row portion 10 in which openings 8 are provided in a row. The opening row portion 10 is a portion in which a cavity having a substantially square cross section extends long and linearly.

空気流路部材5は概略形状が薄い壁状をした部材である。空気流路部材5は、表裏面11,12が薄板で作られ、この表裏面11,12が僅かな隙間を開けて接合され、さらに下面側を除く3辺が接合されたものであり、内部に空気流路13となる空隙が設けられている。
空気流路部材5は一枚の板を折り重ねて表裏面11,12を構成しており、先端部分には鋭角の折り曲げ部14があり、当該折り曲げ部14によって頂部9が構成されている。頂部9は稜線状に延びている。
一方、空気流路部材5の基端側は、表裏面11,12の板間が開放され、空気導入開口15が形成されている。
The air flow path member 5 is a member having a thin wall shape. The air flow path member 5 is made of thin plates on the front and back surfaces 11 and 12, the front and back surfaces 11 and 12 are joined with a slight gap therebetween, and three sides other than the lower surface side are joined. A gap serving as an air flow path 13 is provided.
The air flow path member 5 folds a single plate to constitute the front and back surfaces 11 and 12, and has a bent portion 14 having an acute angle at the tip portion, and the bent portion 14 forms a top portion 9. The top portion 9 extends in a ridgeline shape.
On the other hand, on the base end side of the air flow path member 5, the space between the front and back surfaces 11 and 12 is opened, and an air introduction opening 15 is formed.

空気流路部材5には、空気放出用の開口が3つの領域に設けられている。前記した様に予混合部材2と中間部材6とが交互に配置されて面状をなすものであるから、空気流路部材5の表裏面11,12の板には同一の部位に同一個数の開口が設けられている。
空気放出用の開口が設けられた領域は、大きく分けて先端部と、第一燃焼部に面した位置と、中間部材6に面した位置である。
The air flow path member 5 has air discharge openings in three regions. As described above, since the premixing members 2 and the intermediate members 6 are alternately arranged to form a plane, the same number of plates are provided in the same portion on the front and back surfaces 11 and 12 of the air flow path member 5. An opening is provided.
The region where the air discharge opening is provided is roughly divided into a front end portion, a position facing the first combustion portion, and a position facing the intermediate member 6.

即ち空気流路部材5の表裏面11,12の板は、大部分が平行に配置されているが、先端部分だけが山形に折り曲げられており、表面側と裏面側に傾斜面16,17が形成されている。そして当該傾斜面16,17に先端部開口20が設けられている。また最先端部分(稜線部分)にも先端部開口21が設けられている。先端部開口20,21は、二次火炎に二次空気を供給するために設けられている。   That is, most of the plates of the front and back surfaces 11 and 12 of the air flow path member 5 are arranged in parallel, but only the tip portion is bent in a mountain shape, and the inclined surfaces 16 and 17 are formed on the front side and the back side. Is formed. A tip opening 20 is provided in the inclined surfaces 16 and 17. Further, a tip end opening 21 is also provided at the most distal portion (ridge line portion). The front end openings 20 and 21 are provided for supplying secondary air to the secondary flame.

また空気流路部材5の表裏面11,12は、図1の様に先端側の空気流路13が基端部側に比べて幅狭く作られており、第一燃焼部46の基端部分に相当する部位に段部がある。この段部も傾斜面22となっている。そして前記段部に燃焼部向空気放出開口23が設けられている。燃焼部向空気放出開口23は第一燃焼部46の一次火炎に二次空気を供給し、一次火炎の一部を燃焼させて第一燃焼部46内の一部に二次火炎を発生させるものである。   Further, the front and back surfaces 11 and 12 of the air flow path member 5 are formed such that the front-side air flow path 13 is narrower than the base end side as shown in FIG. There is a step in the part corresponding to. This step portion is also an inclined surface 22. The step portion is provided with an air discharge opening 23 for the combustion portion. The air discharge opening 23 for the combustion part supplies secondary air to the primary flame of the first combustion part 46 and burns a part of the primary flame to generate a secondary flame in a part of the first combustion part 46 It is.

さらに中間部材6に面した位置にも空気放出開口(上流側空気放出開口)48が設けられている。空気放出開口(上流側空気放出開口)48は、炎孔部材3の側面部に空気を供給して保炎を安定化させるものである。   Further, an air discharge opening (upstream air discharge opening) 48 is also provided at a position facing the intermediate member 6. The air discharge opening (upstream air discharge opening) 48 supplies air to the side surface portion of the flame hole member 3 to stabilize flame holding.

炎孔部材3は、本体部材25と減圧壁26によって構成されている。炎孔部材3の本体部材25は、一枚の金属板を曲げ加工して作られたものであり、炎孔として機能する頂面30と、この両端から約90°折り曲げられた二つの側壁部31,32を有している。また炎孔部材3の左右両辺部は閉塞され、図面の下側に位置する面だけが開放されている。炎孔部材3の頂面30は、長尺状であり細長く広がっている。本体部材25の頂面30には、炎孔33となるスリットが規則的に配列されている。本体部材25に設けられた炎孔33は、「中央部開口」として機能する。
側壁部31,32の中間部分には外側(厚さ方向)に膨らんだ膨出部34が設けられている。膨出部34は、炎孔部材3の全幅に渡って設けられている。
The flame hole member 3 includes a main body member 25 and a decompression wall 26. The main body member 25 of the flame hole member 3 is made by bending a single metal plate, and includes a top surface 30 functioning as a flame hole and two side wall portions bent about 90 ° from both ends. 31 and 32. Further, the left and right sides of the flame hole member 3 are closed, and only the surface located on the lower side of the drawing is opened. The top surface 30 of the flame hole member 3 has a long shape and is elongated. On the top surface 30 of the main body member 25, slits to be the flame holes 33 are regularly arranged. The flame hole 33 provided in the main body member 25 functions as a “center opening”.
A bulging portion 34 bulging outward (in the thickness direction) is provided at an intermediate portion between the side wall portions 31 and 32. The bulging portion 34 is provided over the entire width of the flame hole member 3.

側壁部31,32の開放端側は、図の様に二度に渡って約90°折り返され、外側に嵌合用凹溝38が形成されている。嵌合用凹溝38の底壁36は、側壁部31,32に対して垂直であり、嵌合用凹溝38の外壁37は、側壁部31,32と平行である。   The open end sides of the side walls 31 and 32 are folded back by about 90 ° twice as shown in the figure, and a fitting concave groove 38 is formed on the outside. The bottom wall 36 of the fitting groove 38 is perpendicular to the side walls 31, 32, and the outer wall 37 of the fitting groove 38 is parallel to the side walls 31, 32.

本体部材25には前記した様に減圧壁26が取り付けられている。減圧壁26は、本体部材25の側壁部31,32に固定されており、本体部材25の側壁部31,32との間には空隙29がある。空隙29は、図面の上部側が開口している。この開口は、側面側開口27として機能する。
本体部材25の側壁部31,32であって、減圧壁26に面した部位には開口35が設けられており、本体部材25の内面と空隙29とを連通している。
As described above, the decompression wall 26 is attached to the main body member 25. The decompression wall 26 is fixed to the side wall portions 31 and 32 of the main body member 25, and there is a gap 29 between the side wall portions 31 and 32 of the main body member 25. The gap 29 is open on the upper side of the drawing. This opening functions as the side opening 27.
An opening 35 is provided in the side wall portions 31 and 32 of the main body member 25 facing the decompression wall 26, and the inner surface of the main body member 25 and the gap 29 are communicated with each other.

次に各部材同士の関係について説明する。
本実施例では、前記した様に予混合部材2と、炎孔部材3とが嵌合しあって一つ中間部材6を構成している。より具体的には、炎孔部材3の側壁部31,32の間に予混合部材2の開口列部10が挿入されている。実際の製作過程においては、炎孔部材3の側壁部31,32同士の開口(図面下部)から、予混合部材2を挿し込むことによって両者が接合される。
Next, the relationship between the members will be described.
In the present embodiment, as described above, the premixing member 2 and the flame hole member 3 are fitted together to constitute one intermediate member 6. More specifically, the opening row portion 10 of the premixing member 2 is inserted between the side wall portions 31 and 32 of the flame hole member 3. In the actual manufacturing process, the premixing member 2 is inserted through the opening (lower part of the drawing) between the side wall portions 31 and 32 of the flame hole member 3 to join them together.

側壁部31,32と開口列部10との間は図示しない凹凸形状によって部分的に接しており、両者は一体化されている。側壁部31,32と開口列部10との間は前記した様に凹凸形状によって部分的に接しているので、逆に言えば両者の間は部分的に離れている。図1の断面は、側壁部31,32と開口列部10が離れている部位における断面を図示している。
側壁部31,32の膨出部34に相当する部位については、内包される開口列部10とは離れている。膨出部34の部位は、開口列部10の開口8の列部に相当する。従って開口列部10の開口8の外側は、側壁部31,32とは離れており、他に比べて広い空間(混合空間)39がある。この空間は、全ての開口8に相当する部位に渡って連通している。
側壁部31,32の間であって開口列部10の頂部と炎孔部材3の頂面30部分との間には比較的大きな空間47がある。本実施例では、前記した混合空間39と、開口列部10の下流側の空間47によって炎孔上流側流路49が形成されている。
The side wall portions 31 and 32 and the opening row portion 10 are partially in contact with each other by an uneven shape (not shown), and both are integrated. Since the side wall portions 31 and 32 and the opening row portion 10 are partially in contact with each other due to the concavo-convex shape as described above, in other words, the two are partially separated. The cross section of FIG. 1 illustrates a cross section at a portion where the side wall portions 31 and 32 and the opening row portion 10 are separated.
About the site | part corresponded to the bulging part 34 of the side wall parts 31 and 32, it is separated from the opening row | line | column part 10 included. The portion of the bulging portion 34 corresponds to the row portion of the opening 8 of the opening row portion 10. Therefore, the outside of the opening 8 of the opening row portion 10 is separated from the side wall portions 31 and 32, and there is a wider space (mixing space) 39 than others. This space communicates over a portion corresponding to all the openings 8.
There is a relatively large space 47 between the side wall portions 31 and 32 and between the top portion of the opening row portion 10 and the top surface 30 portion of the flame hole member 3. In the present embodiment, the flame hole upstream flow path 49 is formed by the mixing space 39 and the space 47 downstream of the opening row portion 10.

中間部材6の両側に空気流路部材5が装着される。空気流路部材5は、基端側の空気導入開口15に、炎孔部材3の嵌合用凹溝38を嵌合させることによって中間部材6と結合される。即ち嵌合用凹溝38の外壁37を空気導入開口15の中に挿入し、空気流路部材5の突端を嵌合用凹溝38に挿入して嵌合用凹溝38の底壁36に当接させる。   Air flow path members 5 are mounted on both sides of the intermediate member 6. The air flow path member 5 is coupled to the intermediate member 6 by fitting the fitting concave groove 38 of the flame hole member 3 into the air introduction opening 15 on the proximal end side. That is, the outer wall 37 of the fitting groove 38 is inserted into the air introduction opening 15, and the projecting end of the air flow path member 5 is inserted into the fitting groove 38 and brought into contact with the bottom wall 36 of the fitting groove 38. .

空気流路部材5と中間部材6(炎孔部材3)との間は、図示しない凹凸形状によって部分的に接しており、両者は一体化されている。両者の間は前記した様に凹凸形状によって部分的に接しているので、逆に言えば部分的には離れている。図1の断面は機能を理解し易い様に空気流路部材5と中間部材6(炎孔部材3)と間が離れた部位を図示している。ただし、燃焼装置1の上流側の端部(図面下端側)においては、空気流路部材5と中間部材6との間の隙間40が嵌合用凹溝38の底壁36によって封鎖されている。従って空気流路部材5と中間部材6との間の隙間40は、直接的には基端側の外界と連通していない。   The air flow path member 5 and the intermediate member 6 (flame hole member 3) are partially in contact with each other by an uneven shape (not shown), and both are integrated. Since they are partially in contact with each other by the uneven shape as described above, in other words, they are partially apart. The cross section of FIG. 1 illustrates a portion where the air flow path member 5 and the intermediate member 6 (flame hole member 3) are separated so that the function can be easily understood. However, the gap 40 between the air flow path member 5 and the intermediate member 6 is blocked by the bottom wall 36 of the fitting concave groove 38 at the upstream end (the lower end in the drawing) of the combustion device 1. Therefore, the gap 40 between the air flow path member 5 and the intermediate member 6 does not directly communicate with the outside world on the base end side.

炎孔部材3は、前記した様に二つの空気流路部材5に挟まれた位置にあるが、炎孔部材3の頂面30は、空気流路部材5よりも図面下部側にあり、空気流路部材5の間に埋もれた位置にある。そのため炎孔部材3の頂面30よりも先端側の空間は、二つの空気流路部材5の壁よって仕切られている。本実施例では、炎孔部材3の頂面30と二つの空気流路部材5によって囲まれた空間が第一燃焼部46として機能する。   As described above, the flame hole member 3 is located between the two air flow path members 5, but the top surface 30 of the flame hole member 3 is on the lower side of the drawing relative to the air flow path member 5. It is in a position buried between the flow path members 5. Therefore, the space on the tip side of the top surface 30 of the flame hole member 3 is partitioned by the walls of the two air flow path members 5. In the present embodiment, the space surrounded by the top surface 30 of the flame hole member 3 and the two air flow path members 5 functions as the first combustion portion 46.

次に燃焼装置1の機能について説明する。
燃焼装置1は、図示しない箱体に多数配列され、図面下部側から送風機41によって送風される。また燃料ガスがノズル42によって予混合部材2のガス導入口43から導入される。
まず送風の流れについて説明する。送風の流れは、図面に細線で示している。
送風機41によって発生された送風は、整流板44の開口45によって整流され、燃焼装置1の基端部(図面下側)から燃焼装置1の内部に入る。
燃焼装置1の中に入る送風のルートは、3ルートである。即ち第一ルートは、空気流路部材5を通るルートであり、送風は空気流路部材5の基端部に設けられた空気導入開口15から空気流路部材5に入り、内部の空気流路13を先端側に向かって真上に流れる。そして空気の大部分は、先端部開口20,21から外部に放出される。
Next, the function of the combustion apparatus 1 will be described.
Many combustion apparatuses 1 are arranged in a box (not shown) and are blown by a blower 41 from the lower side of the drawing. Further, the fuel gas is introduced from the gas inlet 43 of the premixing member 2 by the nozzle 42.
First, the flow of air will be described. The flow of the blast is indicated by a thin line in the drawing.
The blown air generated by the blower 41 is rectified by the opening 45 of the rectifying plate 44 and enters the inside of the combustion device 1 from the base end (lower side of the drawing) of the combustion device 1.
There are three routes of blowing into the combustion device 1. That is, the first route is a route that passes through the air flow path member 5, and the air flow enters the air flow path member 5 from the air introduction opening 15 provided at the base end portion of the air flow path member 5, and the internal air flow path 13 flows directly upward toward the tip side. And most of the air is discharged to the outside through the tip openings 20 and 21.

また空気流路部材5を流れる空気の一部は、燃焼部向空気放出開口23と空気放出開口(上流側空気放出開口)48からも放出される。
燃焼部向空気放出開口23から放出された空気は、段部の傾斜面22から燃焼装置1の軸線に対して斜め前方に向かって放出される。
また空気放出開口(上流側空気放出開口)48から放出された空気は、空気流路部材5と中間部材6との間の隙間40を流れ、炎孔部材3の側面部に至る。
A part of the air flowing through the air flow path member 5 is also discharged from the air discharge opening 23 for the combustion section and the air discharge opening (upstream air discharge opening) 48.
The air discharged from the air discharge opening 23 for the combustion part is discharged obliquely forward from the inclined surface 22 of the step part with respect to the axis of the combustion apparatus 1.
Further, the air discharged from the air discharge opening (upstream air discharge opening) 48 flows through the gap 40 between the air flow path member 5 and the intermediate member 6 and reaches the side surface portion of the flame hole member 3.

第二のルートは、中間部材6の中を流れるルートである。即ち中間部材6は、予混合部材2の開口列部10が炎孔部材3の側壁部31,32同士の間に挟まれたものであるが、開口列部10と炎孔部材3との間には隙間があり、この隙間の一部は、中間部材6の下部側に開口している。
そのため予混合部材2と炎孔部材3の側壁部31,32との間に開口部28から空気が侵入する。
この空気は、側壁部31,32と開口列部10の間の隙間を流れ、混合空間39に入る。続いて開口列部10と炎孔部材3の頂面30部分の間の空間47に流れる。即ち上記した空気は、炎孔上流側流路49を流れる。そして炎孔33たるスリットから第一燃焼部46に放出される。また空間47に入った空気の一部は、本体部材25の側壁部に設けられた開口35から本体部材25と側壁部31,32との間の空隙29に入り、側面側開口27から第一燃焼部46に放出される。
The second route is a route that flows through the intermediate member 6. That is, the intermediate member 6 is configured such that the opening row portion 10 of the premixing member 2 is sandwiched between the side wall portions 31 and 32 of the flame hole member 3, but between the opening row portion 10 and the flame hole member 3. There is a gap, and a part of this gap is open to the lower side of the intermediate member 6.
Therefore, air enters between the premixing member 2 and the side wall portions 31 and 32 of the flame hole member 3 from the opening 28.
This air flows through the gap between the side wall portions 31 and 32 and the opening row portion 10 and enters the mixing space 39. Subsequently, it flows into the space 47 between the opening row portion 10 and the top surface 30 portion of the flame hole member 3. That is, the above-described air flows through the flame hole upstream flow path 49. Then, it is discharged from the slit as the flame hole 33 to the first combustion section 46. Part of the air that has entered the space 47 enters the space 29 between the main body member 25 and the side wall portions 31 and 32 from the opening 35 provided in the side wall portion of the main body member 25, and the first side through the side surface side opening 27. It is discharged to the combustion unit 46.

次に、空気の第三のルートについて説明する。第三のルートは、一次空気のルートであり、予混合部材2のガス導入口43から燃料ガスと共に導入される。第三のルートは、燃料ガスが流れるルートと同一であるから、以下は燃料ガスの流れとして説明する。燃料ガスの流れは実線の矢印で図示する。   Next, the third route of air will be described. The third route is a route for primary air, and is introduced from the gas introduction port 43 of the premixing member 2 together with the fuel gas. Since the third route is the same as the route through which the fuel gas flows, the following description will be given as the flow of the fuel gas. The flow of fuel gas is illustrated by solid arrows.

予混合部材2のガス導入口43からは一次空気と共に燃料ガスが導入される。燃料ガスは、混合部7等で空気と混合され、開口列部10に流れ込む。開口列部10では、多数の開口8が直線状に並べて配置されているので、開口列部10に入った燃料ガスは、各開口8から均等に放出される。開口列部10の開口8から放出された燃料ガスは、炎孔部材3の側壁部31,32と開口列部10の開口8の間に形成された混合空間39に入り、炎孔上流側流路(混合空間39を含む)49を流れる空気と混合される。
ここで前記した炎孔上流側流路(混合空間39を含む)49を流れる空気は、燃焼装置1の高さ方向(下から上)に流れるのに対し、開口列部10の開口8から放出された燃料ガスは空気の流れに対して垂直方向に流れ込む。そのため開口列部10の開口8から放出された燃料ガスは、混合空間39の部位でも空気と激しく衝突し、空気との混合が促進される。また混合空間39は、開口列部10の長手方向全域に渡って連通しているから、圧力も平滑化される。
Fuel gas is introduced from the gas inlet 43 of the premixing member 2 together with the primary air. The fuel gas is mixed with air in the mixing unit 7 or the like and flows into the opening row unit 10. In the opening row portion 10, since a large number of openings 8 are arranged in a straight line, the fuel gas that has entered the opening row portion 10 is evenly discharged from each opening 8. The fuel gas discharged from the opening 8 of the opening row portion 10 enters the mixing space 39 formed between the side wall portions 31 and 32 of the flame hole member 3 and the opening 8 of the opening row portion 10 and flows upstream of the flame hole. It is mixed with the air flowing through the passage (including the mixing space 39) 49.
Here, the air flowing through the flame hole upstream flow path (including the mixing space 39) 49 flows in the height direction (from the bottom to the top) of the combustion apparatus 1 whereas it is discharged from the openings 8 of the opening row portion 10. The injected fuel gas flows in a direction perpendicular to the air flow. Therefore, the fuel gas discharged from the opening 8 of the opening row portion 10 collides violently with the air even at the portion of the mixing space 39, and the mixing with the air is promoted. Further, since the mixing space 39 communicates over the entire longitudinal direction of the opening row portion 10, the pressure is also smoothed.

燃料ガスは、混合空間39を通過し空間47に流れ込むが、この間においても燃料ガスと空気との混合は促進される。そしてその後は、前記した炎孔上流側流路49の流れと同一であり、開口列部10と炎孔部材3の頂面30部分の間の空間47に入り、多くの部分が炎孔33たるスリットから第一燃焼部46に放出される。また空間47に入った空気の一部は、本体部材25の側壁部31,32に設けられた開口35から減圧壁26と側壁部31,32との間の空隙29に入り、側面側開口27から第一燃焼部46に放出される。
炎孔33から放出される燃料ガスは、予混合部材2の中で空気と混合され、さらに混合空間39内で空気と混合されるので均質であり、且つ炎孔33から放出される時の速度も均一である。
しかしながら、炎孔33から放出される燃料ガスは、空気が混合されてはいるものの、空気量は理論空気量に満たない。炎孔33から放出される燃料ガスは空気不足の状態であり、これだけでは完全燃焼することができない。
The fuel gas passes through the mixing space 39 and flows into the space 47, and the mixing of the fuel gas and air is also promoted during this period. After that, the flow is the same as the flow of the flame hole upstream flow path 49 described above, and enters the space 47 between the opening row portion 10 and the top surface 30 portion of the flame hole member 3, and many portions are the flame holes 33. It is discharged from the slit to the first combustion section 46. Part of the air that has entered the space 47 enters the gap 29 between the decompression wall 26 and the side walls 31, 32 from the opening 35 provided in the side walls 31, 32 of the main body member 25, and the side opening 27. To the first combustion section 46.
The fuel gas discharged from the flame hole 33 is mixed with air in the premixing member 2 and further mixed with air in the mixing space 39, so that the fuel gas is homogeneous and the speed at which the fuel gas is discharged from the flame hole 33. Is even.
However, although the fuel gas discharged from the flame hole 33 is mixed with air, the amount of air is less than the theoretical amount of air. The fuel gas released from the flame hole 33 is in an air-deficient state and cannot be burned completely.

燃料ガスに点火すると、燃料ガスは、第一燃焼部46で一次火炎を発生させ、一次燃焼が行われる。ただし燃料ガスは、前記した様に空気不足状態であるから完全燃焼することはできず、未燃成分が多く生成される。
未燃成分は、第一燃焼部46の開口から外部に放出される。ここで第一燃焼部46の外部には、空気流路部材5の先端部から空気が供給されている。そのため未燃成分は酸素の供給を受けて二次燃焼する。即ち第一燃焼部46外側の領域は第二燃焼部として機能し、二次火炎が発生する。
When the fuel gas is ignited, the fuel gas generates a primary flame in the first combustion unit 46, and primary combustion is performed. However, since the fuel gas is in an air-deficient state as described above, it cannot be burned completely, and many unburned components are generated.
Unburned components are discharged to the outside from the opening of the first combustion section 46. Here, air is supplied to the outside of the first combustion unit 46 from the tip of the air flow path member 5. For this reason, the unburned components are supplied with oxygen and undergo secondary combustion. That is, the area outside the first combustion part 46 functions as a second combustion part, and a secondary flame is generated.

また本実施例では、前記した一次火炎の基端部に空気が供給され、一次火炎の基端部に保炎が発生する。
本実施例では、燃料ガスは、「中央部開口」たる炎孔33から放出されるだけではなく、側面側開口27からも第一燃焼部46に放出される。ただし、側面側開口27から放出される燃料ガスは「中央部開口」たる炎孔33から放出される燃料ガスに比べて流速が遅い。即ち燃料ガスは、本体部材25の側壁部31,32に設けられた開口35から減圧壁26と側壁部31,32との間の空隙29に入り、側面側開口27から第一燃焼部46に放出される。そのため空隙29に入る燃料ガスは量が制限され、側面側開口27から放出される量は少ない。これに対して側面側開口27は大きな開口面積を持つので、側面側開口27から放出される燃料ガスは流速が遅いものとなる。
In this embodiment, air is supplied to the base end portion of the primary flame described above, and flame holding occurs at the base end portion of the primary flame.
In this embodiment, the fuel gas is not only released from the flame hole 33 which is the “center opening”, but also released from the side opening 27 to the first combustion part 46. However, the flow rate of the fuel gas discharged from the side opening 27 is slower than that of the fuel gas discharged from the flame hole 33 which is the “center opening”. That is, the fuel gas enters the gap 29 between the decompression wall 26 and the side walls 31, 32 from the opening 35 provided in the side walls 31, 32 of the main body member 25, and enters the first combustion unit 46 from the side opening 27. Released. Therefore, the amount of fuel gas entering the gap 29 is limited, and the amount released from the side opening 27 is small. On the other hand, since the side opening 27 has a large opening area, the fuel gas discharged from the side opening 27 has a low flow velocity.

さらに前記した様に、空気流路部材5の中を通過する空気の一部が、空気放出開口(上流側空気放出開口)48から空気流路部材5と中間部材6との間の隙間40に放出され、当該隙間40を通って炎孔部材3の側面部に至る。そのため炎孔部材3の側面部は他の部位に比べて酸素量が豊富であり、側面側開口27から放出される燃料ガスは空気の供給を受けて比較的安定して燃焼する。
前記した様に燃料ガスの流速が低いことと相まって側面側開口27の近傍には、安定した保炎が発生する。そのため一次火炎の基端部は側面側開口27の近傍に発生する小さな炎によって保持される。
Further, as described above, a part of the air passing through the air flow path member 5 enters the gap 40 between the air flow path member 5 and the intermediate member 6 from the air discharge opening (upstream air discharge opening) 48. It is discharged and reaches the side surface portion of the flame hole member 3 through the gap 40. For this reason, the side surface portion of the flame hole member 3 is rich in oxygen compared to other portions, and the fuel gas discharged from the side surface side opening 27 is supplied with air and burns relatively stably.
As described above, stable flame holding is generated in the vicinity of the side opening 27 in combination with the low flow rate of the fuel gas. Therefore, the base end portion of the primary flame is held by a small flame generated in the vicinity of the side opening 27.

また本実施例では、燃焼部向空気放出開口23から放出された空気によって二次火炎が安定化する。即ち本実施例では、空気流路部材5の表裏面11,12であって第一燃焼部の基端部分に相当する部位に傾斜面22があり、この傾斜面22に燃焼部向空気放出開口23が設けられているので、第一燃焼部の基端部分から空気の進行方向に対して斜め方向に空気が供給される。そのため供給された空気は、一次火炎や未燃ガスの流れを妨げることなく、第一燃焼部46の中に供給される。その結果、第一燃焼部46の内の未燃ガスの一部が燃焼を開始し、一部に二次火炎が生じる。そしてこの二次火炎は外部の二次火炎と繋がるので外部に発生する二次火炎についても安定している。
また本実施例では、燃焼部向空気放出開口23は斜め方向に開口し、前記した様に一次火炎や未燃ガスの流れを妨げることがないので、二次火炎は空気流路部材5から離れた位置で発生し、空気流路部材5を過度に加熱しない。
そのため本実施例の燃焼装置は、一次火炎及び二次火炎が共に安定し、実用的である。
In the present embodiment, the secondary flame is stabilized by the air discharged from the combustion part air discharge opening 23. That is, in this embodiment, there is an inclined surface 22 on the front and back surfaces 11 and 12 of the air flow path member 5 and corresponding to the base end portion of the first combustion portion. Since 23 is provided, air is supplied from the base end portion of the first combustion section in an oblique direction with respect to the air traveling direction. Therefore, the supplied air is supplied into the first combustion unit 46 without disturbing the flow of the primary flame and unburned gas. As a result, part of the unburned gas in the first combustion section 46 starts to burn, and a secondary flame is generated in part. And since this secondary flame is connected with the external secondary flame, the secondary flame generated outside is also stable.
Further, in this embodiment, the air discharge opening 23 for the combustion part opens in an oblique direction and does not hinder the flow of the primary flame and unburned gas as described above, so that the secondary flame is separated from the air flow path member 5. The air flow path member 5 is not excessively heated.
Therefore, the combustion apparatus of the present embodiment is practical because both the primary flame and the secondary flame are stable.

次に、本発明のより実用的な構成例について図2以下の図面を参照しつつ説明する。以下に説明する実施例は、本発明を実施するために実用的に設計されたものであり、最も推奨される構成である。
図2以降の図面で示す燃焼装置の基本構成及び基本的な機能は、前記した実施例と同一であるが、細部に実用的な工夫が施されている。先の実施例と同一の機能を果たす部材については同一の記号を付し、重複する機能の説明は簡単なものに止める。
Next, a more practical configuration example of the present invention will be described with reference to FIG. The embodiments described below are practically designed to implement the present invention and are the most recommended configurations.
The basic configuration and basic functions of the combustion apparatus shown in the drawings after FIG. 2 are the same as those of the above-described embodiment, but practical details are applied to the details. The members having the same functions as those of the previous embodiment are denoted by the same reference numerals, and the description of the overlapping functions will be simplified.

図2に示す燃焼装置1は、図3,4に示すようにケース54に並列に並べて使用されるものである。本実施例の燃焼装置1についても、予混合部材2と、炎孔部材3と、空気流路部材5とを有する。そして予混合部材2と、炎孔部材3とが嵌合しあって一つ中間部材6を構成し、この中間部材6が二つの空気流路部材5の間に挟まった構成となっている。   The combustion apparatus 1 shown in FIG. 2 is used in parallel with a case 54 as shown in FIGS. The combustion apparatus 1 of the present embodiment also has a premixing member 2, a flame hole member 3, and an air flow path member 5. The premixing member 2 and the flame hole member 3 are fitted together to constitute one intermediate member 6, and the intermediate member 6 is sandwiched between the two air flow path members 5.

予混合部材2の形状は、図9,10,11の通りである。予混合部材2は、一枚の鋼板をプレスして表面に凹凸を有する展開図形を成形し、これを曲げ加工した後、周囲をスポット溶接によって接合されたものである。スポット溶接は、周囲のフランジ部51で行われている。   The shape of the premixing member 2 is as shown in FIGS. The premixing member 2 is formed by pressing a single steel plate to form a developed figure having irregularities on the surface, bending it, and then joining the periphery by spot welding. Spot welding is performed at the surrounding flange portion 51.

組み立て後の予混合部材2の形状は、図8,9の様な正面板52と、これに対称形状の裏板53が重ね合わされたものである。予混合部材2の外観はずんぐりした形をしており、平坦な頂部50を有し、周囲はガスが漏れない様に閉塞されている。
そして内部には正面板52と裏板53の間によって一連の気体流路が形成されている。即ち正面板52と裏板53の凹凸が合致する部分では、金属板同士が隙間を形成して配列された状態となっており、この隙間によって気体流路が形成される。
The shape of the premixing member 2 after assembling is such that a front plate 52 as shown in FIGS. 8 and 9 and a symmetrical back plate 53 are superimposed on this. The external appearance of the premixing member 2 has a sharp shape, has a flat top 50, and is closed so that gas does not leak out.
A series of gas passages are formed between the front plate 52 and the back plate 53 inside. That is, in the part where the unevenness of the front plate 52 and the back plate 53 coincides, the metal plates are arranged in a gap, and a gas flow path is formed by this gap.

本実施例で採用する予混合部材2では、気体流路は、図9の様に大きく上下の部位に分かれている。具体的には気体流路は、大きく分けて混合流路19と開口列部10からなる。
混合流路19は、図9の様に予混合部材2の下部側にあり、気体流路の入口から開口列部10に至るまでの流路である。気体流路の入口から説明すると、燃焼装置1の下側角には、図9の様に、ガス導入口43が開口している。そしてガス導入口43の内部には、一時的に断面積が絞られた絞り部55があり、さらにその下流側は断面積が次第に大きくなっていく拡径部56がある。そしてその後は、断面積が一様な均一断面部57となっている。ガス導入口43から絞り部55、拡径部56を経て均一断面部57に至る迄の間は、流路が直線的である。
均一断面部57の末端部は、流路が垂直に曲がって開口列部10に繋がっている。
なお本実施例では、開口列部10の直前部分に絞りとなる部位はない。
In the premixing member 2 employed in the present embodiment, the gas flow path is largely divided into upper and lower parts as shown in FIG. Specifically, the gas flow path is roughly composed of a mixing flow path 19 and an opening row portion 10.
As shown in FIG. 9, the mixing channel 19 is on the lower side of the premixing member 2 and is a channel from the inlet of the gas channel to the opening row portion 10. If it demonstrates from the inlet_port | entrance of a gas flow path, the gas inlet 43 will open at the lower side corner of the combustion apparatus 1 like FIG. Inside the gas introduction port 43, there is a constricted part 55 whose sectional area is temporarily constricted, and further on the downstream side there is a diameter-enlarging part 56 whose sectional area gradually increases. After that, the uniform cross section 57 has a uniform cross section. The flow path is linear from the gas introduction port 43 to the uniform cross section 57 through the throttle portion 55 and the enlarged diameter portion 56.
The end of the uniform cross section 57 is connected to the opening row portion 10 with the flow path bent vertically.
In the present embodiment, there is no portion that becomes a stop immediately before the opening row portion 10.

開口列部10は、予混合部材2の上端部に位置し、図9の様に長手方向全域に渡って延びている。開口列部10の断面積、言い換えれば当該部分での正面板52と裏板53の隙間は、図10,11の様に大きい。
開口列部10の断面形状は、図10,11の様に二段形状となっており、頂部側は狭面積部58となっており、断面積がやや狭い。
即ち開口列部10の断面形状を説明すると、頂部50は平坦であり、頂部50の両辺から垂直に上部側垂直壁81がある。そして垂直壁81の端部は傾斜壁に繋がってやや外側にひろがっている。さらに傾斜壁の末端は下部側垂直壁82となっている。
The opening row | line | column part 10 is located in the upper end part of the premixing member 2, and is extended over the whole longitudinal direction like FIG. The cross-sectional area of the opening row 10, in other words, the gap between the front plate 52 and the back plate 53 at that portion is large as shown in FIGS.
The cross-sectional shape of the opening row portion 10 is a two-stage shape as shown in FIGS. 10 and 11, and the top side is a narrow area portion 58, and the cross-sectional area is slightly narrow.
That is, the cross-sectional shape of the opening row portion 10 will be described. The top portion 50 is flat, and the upper vertical wall 81 is perpendicular to both sides of the top portion 50. The end of the vertical wall 81 is connected to the inclined wall and extends slightly outward. Further, the end of the inclined wall is a lower side vertical wall 82.

そして開口列部10の外表面であって、前記した狭面積部58には、正面板52と裏板53の双方に、それぞれ多数の開口8が設けられている。開口8は、一定の間隔を開けて直線状に並んで列状に設けられている。
本実施例では、開口8は開口列部10の正面側と裏面側にだけ設けられ、頂部50には開口は無い。
A large number of openings 8 are provided on both the front plate 52 and the back plate 53 in the narrow area 58 described above, which is the outer surface of the opening row portion 10. The openings 8 are provided in a line along a straight line with a certain interval.
In the present embodiment, the opening 8 is provided only on the front side and the back side of the opening row portion 10, and the top portion 50 has no opening.

次に空気流路部材5について図8,12,20を参照しつつ説明する。空気流路部材5についても一枚の鋼板をプレスして表面に凹凸を有する展開図形を成形し、これを曲げ加工した後スポット溶接によって接合されたものである。空気流路部材5では、図8の様に表裏面11,12が僅かな隙間を開けて接合され、内部に空気流路13となる空隙が設けられている。
空気流路部材5の先端部分には鋭角の折り曲げ部があり、当該折り曲げ部によって頂部9が構成されている。頂部9は稜線状に延びている。
空気流路部材5は、図12の様に折り曲げ部と接する二辺にフランジ部83が設けられ、当該フランジ部83がスポット溶接されている。
空気流路部材5の基端側は、図8の様に表裏面11,12の板間が開放され、空気導入開口15が形成されている。
Next, the air flow path member 5 will be described with reference to FIGS. The air flow path member 5 is also formed by pressing a single steel plate to form a developed figure having irregularities on the surface, bending it, and then joining it by spot welding. In the air flow path member 5, the front and back surfaces 11 and 12 are joined with a slight gap as shown in FIG. 8, and a gap serving as the air flow path 13 is provided inside.
There is an acute bent portion at the tip of the air flow path member 5, and the apex portion 9 is constituted by the bent portion. The top portion 9 extends in a ridgeline shape.
As shown in FIG. 12, the air flow path member 5 is provided with flange portions 83 on two sides in contact with the bent portion, and the flange portions 83 are spot-welded.
On the proximal end side of the air flow path member 5, the space between the front and back surfaces 11 and 12 is opened as shown in FIG. 8, and an air introduction opening 15 is formed.

空気流路部材5の外観形状は図12の様に薄い壁状である。空気流路部材5は、図12の様な縦置き状態を基準として高さ方向に対して大まかに3つの領域に分かれている。
即ち基端部から約1/3の高さまでが導入部60である。さらに高さ方向に約1/3の領域は中間部61である。そして先端側の約1/3の領域は第一燃焼部構成部62である。
The appearance of the air flow path member 5 is a thin wall as shown in FIG. The air flow path member 5 is roughly divided into three regions with respect to the height direction on the basis of the vertically placed state as shown in FIG.
That is, the introduction portion 60 extends from the base end portion to a height of about 1/3. Furthermore, the region of about 3 in the height direction is the intermediate portion 61. The approximately 1/3 region on the front end side is the first combustion portion constituting portion 62.

空気流路部材5は、空気導入開口15から先端部側に向かう流路を構成するものであるが、流路の断面積は、先端側に向かうほど狭くなっている。
即ち空気導入開口15から全高の約1/3までの部位(導入部60)は、図8の様に断面積が略一定である。言い換えれば導入部60は、図8の断面図の様に表裏面11,12が平行であり、間隔は変わらない。
The air flow path member 5 constitutes a flow path from the air introduction opening 15 toward the front end side, but the cross-sectional area of the flow path becomes narrower toward the front end side.
That is, the cross-sectional area of the portion (introduction portion 60) from the air introduction opening 15 to about 1/3 of the total height is substantially constant as shown in FIG. In other words, the introduction part 60 has the front and back surfaces 11 and 12 parallel to each other as shown in the cross-sectional view of FIG.

中間部61は、概ねテーパー状である。
即ち中間部61は図の様に下方が広く、上に向かうに連れて間隔が狭まるテーパー状である。ただし、テーパーの先端側末端部分と第一燃焼部構成部62との境界部分には、膨出部84が設けられている。膨出部84を構成する外壁部分は、表裏部分が平行である。
The intermediate part 61 is generally tapered.
That is, the intermediate portion 61 has a tapered shape in which the lower portion is wide as shown in the drawing and the interval is narrowed toward the upper portion. However, a bulging portion 84 is provided at a boundary portion between the distal end side end portion of the taper and the first combustion portion constituting portion 62. As for the outer wall part which comprises the bulging part 84, the front and back part is parallel.

第一燃焼部構成部62については断面積が略一定であるが(頂部9を除く)、この間の単位長さ当たりの断面積は導入部60のそれに比べて1/3程度である。
第一燃焼部構成部62と中間部61との間には傾斜面22からなる段部がある。
Although the cross-sectional area of the first combusting part constituting part 62 is substantially constant (excluding the top part 9), the cross-sectional area per unit length during this period is about 1/3 of that of the introducing part 60.
There is a step portion formed of the inclined surface 22 between the first combustion portion constituting portion 62 and the intermediate portion 61.

空気流路部材5には、3箇所の領域に空気放出用の開口が設けられている。
空気放出用の開口が設けられた位置は、大きく分けて先端部と、第一燃焼部に面した位置と、中間部材6に面した位置である。
The air flow path member 5 is provided with air discharge openings in three regions.
The positions where the air discharge openings are provided are roughly divided into a front end portion, a position facing the first combustion portion, and a position facing the intermediate member 6.

即ち空気流路部材5の表裏面11,12の板の先端部分は山形に折り曲げられており、表面側と裏面側に傾斜面16,17が形成されている。そして当該傾斜面16,17に図12の様に円形の先端部開口20が設けられている。また最先端部分(稜線部分)にも円形の先端部開口21が設けられている。
さらに本実施例では、頂部及び傾斜面16,17にスリット状の先端部開口63,64が設けられている。スリットの長さは大小二種類あり、小さい方のスリット状の先端部開口63は、双方の傾斜面16,17の全てと頂部9とを連通するスリットである。大きい方のスリット(先端部開口)64は、さらに長く、表裏面11,12が平行である部位から頂部9にまで至っている。
That is, the front end portions of the front and back surfaces 11 and 12 of the air flow path member 5 are bent in a mountain shape, and inclined surfaces 16 and 17 are formed on the front surface side and the back surface side. The inclined surfaces 16 and 17 are provided with a circular tip opening 20 as shown in FIG. In addition, a circular tip opening 21 is also provided at the most distal portion (ridge line portion).
Further, in the present embodiment, slit-shaped tip openings 63 and 64 are provided on the top and the inclined surfaces 16 and 17. There are two types of slit lengths: the smaller slit-shaped tip opening 63 is a slit that connects all the inclined surfaces 16, 17 and the top 9. The larger slit (front end opening) 64 is longer and extends from the portion where the front and back surfaces 11 and 12 are parallel to the top portion 9.

大きいスリット(先端部開口)64の方が小さいスリット(先端部開口)63よりも数が多く、大きなスリット64が連続して2列または3列設けられ、次いで小さいスリット63が設けられ、さらにそれに続いて大きなスリット64が連続して2列または3列設けられ、これが空気流路部材5の長さ方向の全域に渡って連続している。
前記した円形の先端部開口20,21は、各スリット(先端部開口)63,64の間に設けられている。
The large slits (tip opening) 64 have a larger number than the small slits (tip opening) 63, and the large slits 64 are continuously provided in two or three rows, and then the small slits 63 are provided. Subsequently, two or three rows of large slits 64 are continuously provided, and these are continuous over the entire length direction of the air flow path member 5.
The circular tip openings 20 and 21 are provided between the slits (tip openings) 63 and 64.

先端部開口20,21は、先の実施例と同様、二次火炎に二次空気を供給するために設けられたものである。   The front end openings 20 and 21 are provided to supply secondary air to the secondary flame, as in the previous embodiment.

また前記した第一燃焼部構成部62と中間部61との間の傾斜面22に燃焼部向空気放出開口23が設けられている。燃焼部向空気放出開口23は第一燃焼部46の一次火炎に二次空気を供給し、一次火炎の一部を燃焼させて一部に二次火炎を発生させるものである。   An air discharge opening 23 for the combustion part is provided on the inclined surface 22 between the first combustion part constituting part 62 and the intermediate part 61 described above. The air discharge opening 23 for the combustion part supplies secondary air to the primary flame of the first combustion part 46 and burns a part of the primary flame to generate a secondary flame in part.

さらに導入部60と中間部61との境界近傍にも空気放出開口(上流側空気放出開口)48が設けられている。空気放出開口(上流側空気放出開口)48は、炎孔部材3の側面部に空気を供給して保炎を安定化させるものである。   Further, an air discharge opening (upstream air discharge opening) 48 is also provided in the vicinity of the boundary between the introduction portion 60 and the intermediate portion 61. The air discharge opening (upstream air discharge opening) 48 supplies air to the side surface portion of the flame hole member 3 to stabilize flame holding.

空気流路部材5の表裏面11,12には、両者の間に隙間を設けるためや、他の部材との間に隙間を設けることを目的として各部に凹凸形状が設けられている。
順次説明すると、先端側の第一燃焼部構成部62を構成する壁面には、高さ方向に延びる凹溝70,71が複数設けられている。凹溝70,71は、いずれも表面側から見て凹んだ形状であり、高さ方向に延びている。凹溝70は凹溝71よりも短い。凹溝70,71は、いずれも平行に並べて配置されている。凹溝70,71は主として板体の補強のために設けられたものである。
本実施例では、複数の短い凹溝70が設けられ、続いて長い凹溝71が設けられ、さらに短い凹溝70が複数設けられるという配列で空気流路部材5の全幅に渡って凹溝70,71が配置されている。
The front and back surfaces 11 and 12 of the air flow path member 5 are provided with uneven shapes in each part for the purpose of providing a gap between them or for providing a gap between other members.
To explain sequentially, a plurality of concave grooves 70 and 71 extending in the height direction are provided on the wall surface constituting the first combustion portion constituting portion 62 on the front end side. The concave grooves 70 and 71 are both concave when viewed from the surface side, and extend in the height direction. The concave groove 70 is shorter than the concave groove 71. The concave grooves 70 and 71 are both arranged in parallel. The concave grooves 70 and 71 are provided mainly for reinforcing the plate.
In this embodiment, a plurality of short grooves 70 are provided, followed by a long groove 71, and a plurality of short grooves 70 are provided, and the grooves 70 are formed over the entire width of the air flow path member 5. , 71 are arranged.

また長い凹溝71同士の間は他の凹溝同士の間隔に比べて広い。
そして長い凹溝71同士の間であって、凹溝71の基端部近傍の位置には、図12,13の様な流線形の凹変部72が設けられている。凹変部72についても表面側から見て凹んだ形状である。凹変部72の形状は、具体的には、大円と小円とが中心を離れて配置され、両者を共通の接線で結んだものであり、大円側が空気流路の上流側に位置し、小円側が空気流路の下流側に位置している。二つの円の中心を結ぶ線は、空気の流れ方向に対して平行である。二つの円を結ぶ共通接線は、円の中心を結ぶ線に対して30°以下の傾きを持つ。
Further, the distance between the long grooves 71 is wider than the distance between the other grooves.
A streamlined recess 72 as shown in FIGS. 12 and 13 is provided between the long recesses 71 and in the vicinity of the base end of the recess 71. The concave deformation portion 72 is also a concave shape when viewed from the front side. Specifically, the shape of the concave change portion 72 is such that a large circle and a small circle are arranged apart from each other and connected by a common tangent line, and the large circle side is located upstream of the air flow path. However, the small circle side is located downstream of the air flow path. A line connecting the centers of the two circles is parallel to the air flow direction. A common tangent line connecting two circles has an inclination of 30 ° or less with respect to a line connecting the centers of the circles.

空気流路部材5の中間部61には、図12の様に6条の凸条73が設けられている。凸条73の方向は、空気の流れ方向に対して平行である。凸条73は、後記する様に中間部材6の外面と当接して両者の間に隙間を設けるものであり、凸条73の突端(稜線)の位置(空気流路部材5の中心線からの距離)は、どの部位においても等しい。即ち前記した様に中間部61は、流路の断面形状がテーパ状であるが、凸条73の高さ(出っ張りの大きさ)は逆テーパ状に変化し、突端部分の位置は揃っている。 The middle portion 61 of the air flow path member 5 is provided with six ridges 73 as shown in FIG. The direction of the ridges 73 is parallel to the air flow direction. As will be described later, the ridge 73 is in contact with the outer surface of the intermediate member 6 to provide a gap therebetween, and the position of the protrusion (ridgeline) of the ridge 73 (from the center line of the air flow path member 5). (Distance) is the same in any part. Intermediate section 61 as described above that is, the cross-sectional shape of the flow channel is tapered over shape, the height of the ridge 73 (protrusion size) varies in inverse tapered over shape, the position of the projecting end portion is aligned ing.

空気流路部材5の導入部60にも複数の凹溝75が多数平行に設けられている。凹溝75は、いずれも空気流路部材5の基端側から先端側に延びている。凹溝75は、表面側から見て凹んだ形状である。   A plurality of concave grooves 75 are also provided in parallel in the introduction portion 60 of the air flow path member 5. Each of the concave grooves 75 extends from the proximal end side to the distal end side of the air flow path member 5. The concave groove 75 has a concave shape when viewed from the surface side.

空気流路部材5の導入部60近傍には、横方向(空気の流れに対して垂直方向)に延びる凹溝77が設けられている。
凹溝77は、主として位置決めのために設けられたものである。
A concave groove 77 extending in the lateral direction (perpendicular to the air flow) is provided in the vicinity of the introduction portion 60 of the air flow path member 5.
The concave groove 77 is provided mainly for positioning.

また空気流路部材5の側面部分に目を移すと、両側面の中央部分に略三角形の突起80が設けられている。   Further, when the eyes are moved to the side surface portion of the air flow path member 5, a substantially triangular protrusion 80 is provided at the center portion of both side surfaces.

次に炎孔部材3について説明する。炎孔部材3は、図8,14の様に本体部材25の側面に減圧壁26が溶接されたものである。
炎孔部材3の本体部材25についても一枚の鋼板をプレスして表面に凹凸を有する展開図形を成形し、これを曲げ加工した後スポット溶接して作られている。本体部材25についても図14の様に頂面30に繋がる2辺にフランジ85があり、当該フランジ85で接合され、頂面30と対向する面は解放されている。
Next, the flame hole member 3 will be described. The flame hole member 3 is formed by welding a decompression wall 26 to the side surface of the main body member 25 as shown in FIGS.
The main body member 25 of the flame hole member 3 is also formed by pressing a single steel plate to form a developed figure having irregularities on the surface, bending it, and spot welding. As shown in FIG. 14, the main body member 25 also has flanges 85 on two sides connected to the top surface 30, joined by the flange 85, and the surface facing the top surface 30 is released.

炎孔部材3の、本体部材25は、図8,14の様に炎孔として機能する頂面30と、この両端から約90°折り曲げられた二つの側壁部31,32を有している。炎孔部材3の頂面30は、長尺状であり細長く広がっている。また頂部30は屋根状であり、中央の稜線部86が最も高く、その両側は緩やかな傾斜壁87となっている。
炎孔部材3は、前記した様に鋼板を曲げ加工したものであるが、頂部30の稜線部86は、鋼板が折り込まれている。そのため図の様に内部の空洞には、折り込まれた部位が垂直壁88として垂下している。
The main body member 25 of the flame hole member 3 has a top surface 30 functioning as a flame hole as shown in FIGS. 8 and 14, and two side wall portions 31 and 32 bent about 90 ° from both ends. The top surface 30 of the flame hole member 3 has a long shape and is elongated. Moreover, the top part 30 is roof-like, the center ridgeline part 86 is the highest, and the both sides become the gentle inclined wall 87. FIG.
The flame hole member 3 is formed by bending a steel plate as described above, but the steel plate is folded at the ridge line portion 86 of the top portion 30. Therefore, as shown in the drawing, the folded portion hangs down as a vertical wall 88 in the internal cavity.

本体部材25の頂面30には炎孔(中央側開口)33となるスリット状の開口が設けられている。スリット(炎孔33)は、頂部30の幅方向に延びるものである。スリット状の開口は複数、平行に並んで、頂部30の長手方向の全域に設けられている。そして、図14の様に、複数のスリット状の開口を一組にして炎孔群89が構成されており、炎孔群89は頂面30に一定間隔毎に配置される構成となる。   The top surface 30 of the main body member 25 is provided with a slit-like opening serving as a flame hole (center side opening) 33. The slit (flame hole 33) extends in the width direction of the top 30. A plurality of slit-shaped openings are arranged in parallel, and are provided in the entire region of the top portion 30 in the longitudinal direction. Then, as shown in FIG. 14, a flame hole group 89 is configured with a plurality of slit-shaped openings as a set, and the flame hole group 89 is arranged on the top surface 30 at regular intervals.

本体部材25の断面形状に注目すると、本体部材25は、図8の様に2か所の絞り部78,79がある。逆に言えば基端部を除いて二箇所の膨出部90,91がある。
即ち前記した頂面30の部位を含む先端側膨出部90と、中間部に設けられた中間膨出部91とがある。そして中間膨出部91と先端側膨出部90との間に先端側絞り部78がある。また中間膨出部91の基端部側には基端部側絞り部79がある。
Paying attention to the cross-sectional shape of the main body member 25, the main body member 25 has two narrowed portions 78 and 79 as shown in FIG. In other words, there are two bulging portions 90 and 91 except for the base end portion.
In other words, there are a tip-side bulged portion 90 including the portion of the top surface 30 and an intermediate bulged portion 91 provided in the intermediate portion. A front end side narrowed portion 78 is provided between the intermediate bulging portion 91 and the front end side bulging portion 90. Further, a proximal end side throttle portion 79 is provided on the proximal end side of the intermediate bulging portion 91.

前記した膨出部90,91及び絞り部78,79の中で、先端側膨出部90と中間膨出部90は、共に炎孔部材3の全幅に渡って設けられている。
また先端側膨出部91の側面には図14の様に一列に開口35が設けられている。開口35は、小さな孔である。
基端部側絞り部79には、図14の様に複数の凸条92が設けられている。凸条92は、表面側から見て外側に突出するものであり、内部には図6の様に溝93が形成されている。凸条92は、炎孔部材3の高さ方向に延びる。そして凸条92は、炎孔部材3の幅方向に平行に広がっている。
Of the bulging portions 90 and 91 and the narrowed portions 78 and 79 described above, the tip-side bulging portion 90 and the intermediate bulging portion 90 are both provided over the entire width of the flame hole member 3.
Further, openings 35 are provided in a row on the side surface of the distal side bulging portion 91 as shown in FIG. The opening 35 is a small hole.
The proximal end side narrowed portion 79 is provided with a plurality of ridges 92 as shown in FIG. The ridge 92 protrudes outward as viewed from the surface side, and a groove 93 is formed inside as shown in FIG. The ridge 92 extends in the height direction of the flame hole member 3. The ridge 92 extends in parallel with the width direction of the flame hole member 3.

側壁部31,32の開放端側は、図6,8,16,17の様に二度に渡って約90°折り返され、外側に嵌合用凹溝38が形成されている。嵌合用凹溝38の底壁36は、側壁部31,32に対して垂直であり、嵌合用凹溝38の外壁37は、側壁部31,32と平行である。
嵌合用凹溝38を構成する外壁37は、正面形状が略台形である。即ち外壁37の両側の辺は図15の拡大図の様に傾斜しており、テーパー状に先側が細くなっている。また嵌合用凹溝38内における側壁部31,32には、図16,17の様に突起95が設けられている。突起95の位置は、嵌合用凹溝38の両端であり、両端に各1個つ突起95が設けられている。
The open end sides of the side wall portions 31 and 32 are folded back by about 90 ° twice as shown in FIGS. 6, 8, 16, and 17, and a fitting groove 38 is formed on the outside. The bottom wall 36 of the fitting groove 38 is perpendicular to the side walls 31, 32, and the outer wall 37 of the fitting groove 38 is parallel to the side walls 31, 32.
The outer wall 37 constituting the fitting groove 38 has a substantially trapezoidal front shape. That is, the sides on both sides of the outer wall 37 are inclined as shown in the enlarged view of FIG. 15, and the tip side is tapered in a tapered shape. Further, as shown in FIGS. 16 and 17, projections 95 are provided on the side wall portions 31 and 32 in the fitting concave groove 38. Position of the projection 95 is at both ends of the fitting groove 38, each one not a One protrusion 95 is provided at both ends.

減圧壁26は、本体部材25の側壁部31,32の上端部に固定されている。減圧壁26は図14の様に長尺の板状であり、本体部材25の先端側膨出部90を全域に渡って覆う。本体部材25の側壁部31,32と減圧壁26との間には空隙29がある。空隙29は、図面上部側が開口している。この開口は、側面側開口27として機能する。なお減圧壁26の内面には図8の様に小さな突起97があり、当該突起97が本体部材25と当接して側面側開口27の間隔を規制している。   The decompression wall 26 is fixed to the upper end portions of the side wall portions 31 and 32 of the main body member 25. The decompression wall 26 has a long plate shape as shown in FIG. 14 and covers the distal end side bulging portion 90 of the main body member 25 over the entire area. There is a gap 29 between the side wall portions 31, 32 of the main body member 25 and the decompression wall 26. The gap 29 is open on the upper side of the drawing. This opening functions as the side opening 27. Note that a small protrusion 97 is provided on the inner surface of the decompression wall 26 as shown in FIG. 8, and the protrusion 97 abuts the main body member 25 to regulate the interval between the side opening 27.

前記したように先端側膨出部90には一列に開口35(図14)があり、この開口35が本体部材25の内面と空隙29とを連通している。   As described above, the distal-side bulged portion 90 has the openings 35 (FIG. 14) in a row, and the openings 35 communicate the inner surface of the main body member 25 with the gap 29.

本体部材25の両端部は、側壁部31,32同士が重ね合わされてフランジ85を構成し、スポット溶接によって接合されているが、基端側から中間膨出部の近傍までの間は、側壁部31,32同士の間にスリット98がある。   Both end portions of the main body member 25 are overlapped with the side wall portions 31 and 32 to form a flange 85 and are joined by spot welding, but the side wall portion extends from the proximal end side to the vicinity of the intermediate bulge portion. There is a slit 98 between 31 and 32.

次に各部材同士の関係について、図5、6を参照しつつ説明する。
本実施例の燃焼装置についても、予混合部材2と、炎孔部材3とが嵌合しあって中間部材6を構成している。
炎孔部材3(中間部材6)は、前記した様に二つの空気流路部材5に挟まれた位置にあるが、炎孔部材3の頂面30は、空気流路部材5の上端よりも図面下部側にあり、空気流路部材5の間に埋もれた位置にある。そのため炎孔部材3の頂面30よりも先端側の空間は、二つの空気流路部材5の壁によって仕切られている。本実施例では、炎孔部材3の頂面30と二つの空気流路部材5によって囲まれた空間が第一燃焼部46として機能する。
Next, the relationship between the members will be described with reference to FIGS.
Also in the combustion apparatus of the present embodiment, the premixing member 2 and the flame hole member 3 are fitted together to constitute the intermediate member 6.
Although the flame hole member 3 (intermediate member 6) is located between the two air flow path members 5 as described above, the top surface 30 of the flame hole member 3 is more than the upper end of the air flow path member 5. It is on the lower side of the drawing and is in a position buried between the air flow path members 5. Therefore, the space on the tip side of the top surface 30 of the flame hole member 3 is partitioned by the walls of the two air flow path members 5. In the present embodiment, the space surrounded by the top surface 30 of the flame hole member 3 and the two air flow path members 5 functions as the first combustion portion 46.

中間部材6は、炎孔部材3に予混合部材2が装着されたものであり、予混合部材2の頂部50側が炎孔部材3の空洞部分に挿入されている。この時、予混合部材2の両端のフランジ部51が炎孔部材3の両端に形成されたスリット98に嵌まり込む。そして予混合部材2の突端とスリット98の奥端とが当接して挿入方向の位置決めがなされている。
また予混合部材2の開口列部10の下部側に設けられた垂直壁82が炎孔部材3の基端部側絞り部79の内壁と当接して厚み方向の位置決めがなされている。
予混合部材2の開口列部10の狭面積部58は炎孔部材3の中間膨出部91の位置となる。
The intermediate member 6 is obtained by mounting the premixing member 2 on the flame hole member 3, and the top 50 side of the premixing member 2 is inserted into a hollow portion of the flame hole member 3. At this time, the flange portions 51 at both ends of the premixing member 2 are fitted into the slits 98 formed at both ends of the flame hole member 3. Then, the protruding end of the premixing member 2 and the back end of the slit 98 come into contact with each other and positioning in the insertion direction is performed.
Further, the vertical wall 82 provided on the lower side of the opening row portion 10 of the premixing member 2 is brought into contact with the inner wall of the base end side restricting portion 79 of the flame hole member 3 so as to be positioned in the thickness direction.
The narrow area portion 58 of the opening row portion 10 of the premixing member 2 is the position of the intermediate bulging portion 91 of the flame hole member 3.

予混合部材2の開口列部10と、炎孔部材3の間の隙間に注目すると、前記した様に炎孔部材3の側壁部31,32の中間膨出部91に開口列部10の狭面積部58がある。即ち中間膨出部91の部位は、開口列部10の開口8の列部に相当する。従って開口列部10の開口8の外側は、側壁部31,32から離れており、開口8の外側には他に比べて広い空間(混合空間)39がある。この混合空間39は、全ての開口8に相当する部位に渡って連通している。   When attention is paid to the gap between the opening row portion 10 of the premixing member 2 and the flame hole member 3, the narrowness of the opening row portion 10 is narrowed to the intermediate bulging portion 91 of the side wall portions 31 and 32 of the flame hole member 3 as described above. There is an area 58. That is, the portion of the intermediate bulging portion 91 corresponds to the row portion of the openings 8 of the opening row portion 10. Therefore, the outer side of the opening 8 of the opening row part 10 is separated from the side wall parts 31 and 32, and there is a wider space (mixing space) 39 than the other on the outer side of the opening 8. The mixing space 39 communicates over a portion corresponding to all the openings 8.

一方、前記した様に予混合部材2の開口列部10の下部側が炎孔部材3の基端部側絞り部79の内壁と当接している。そのため当該部位については、幅方向の殆どの位置で開口列部10の外壁と炎孔部材3の内壁が接しており、隙間がない。しかしながら、基端部側絞り部79には、前記した様に複数の凸条92が設けられており、凸条92の内面側は凹溝93(図6)となっている。従って凸条92の部分については開口列部10の外壁と炎孔部材3の内壁との間が離れている。また凸条92は、炎孔部材3の高さ方向に延びているから、前記した混合空間39は炎孔部材3の基端側に連通している。   On the other hand, as described above, the lower side of the opening row portion 10 of the premixing member 2 is in contact with the inner wall of the base end side throttle portion 79 of the flame hole member 3. Therefore, the outer wall of the opening row portion 10 and the inner wall of the flame hole member 3 are in contact with each other at almost all positions in the width direction, and there is no gap. However, as described above, the base end side restricting portion 79 is provided with a plurality of protruding ridges 92, and the inner surface side of the protruding ridges 92 is a concave groove 93 (FIG. 6). Therefore, in the portion of the ridge 92, the outer wall of the opening row portion 10 and the inner wall of the flame hole member 3 are separated. Further, since the ridge 92 extends in the height direction of the flame hole member 3, the mixed space 39 communicates with the base end side of the flame hole member 3.

ここで凸条92の位置と予混合部材2の開口列部10に設けられた開口8との位置関係に注目すると、図18の様に凸条92の真上の位置に開口8がある。即ち凸条92を延長すると開口8の位置と交わる。本実施形態では、図18の様に凸条92と開口8とは一対一に対応する。ただし図19の様に開口8の方が数が多かったり、逆に凸条92の方が数が多いといった様に、両者は必ずしも一対一に対応していなくてもよい。   Here, paying attention to the positional relationship between the position of the ridge 92 and the opening 8 provided in the opening row portion 10 of the premixing member 2, the opening 8 is at a position directly above the ridge 92 as shown in FIG. That is, when the ridge 92 is extended, it intersects with the position of the opening 8. In the present embodiment, the ridge 92 and the opening 8 correspond one-to-one as shown in FIG. However, as shown in FIG. 19, the openings 8 do not necessarily correspond one-to-one, such that the number of the openings 8 is large, or the number of the protrusions 92 is large.

炎孔部材3の基端部と予混合部材2との間には隙間がある。従って前記した混合空間39は、凸条92(凹溝93)及び基端部の隙間を介して外部と連通している。
一方、混合空間39のさらに先端側に注目すると、側壁部31,32の間であって開口列部10の頂部50と炎孔部材3の頂面30部分との間には比較的大きな空間47がある。本実施例では、前記した混合空間39と、開口列部10の下流側の空間47によって炎孔上流側流路49が形成されている。
There is a gap between the base end portion of the flame hole member 3 and the premixing member 2. Therefore, the mixing space 39 described above communicates with the outside through the protrusions 92 (concave grooves 93) and the gaps at the base end portions.
On the other hand, when attention is paid to the further front end side of the mixing space 39, a relatively large space 47 between the side wall portions 31 and 32 and between the top portion 50 of the opening row portion 10 and the top surface 30 portion of the flame hole member 3. There is. In the present embodiment, the flame hole upstream flow path 49 is formed by the mixing space 39 and the space 47 downstream of the opening row portion 10.

中間部材6の両側には図5,6の様に空気流路部材5が装着されている。空気流路部材5は、基端側の空気導入開口15に、炎孔部材3の嵌合用凹溝38を嵌合させて中間部材6に固定されている。即ち嵌合用凹溝38の外壁37を空気導入開口15の中に挿入し、空気流路部材5の突端を嵌合用凹溝38入れて嵌合用凹溝38の底壁36に当接させる。
なお嵌合用凹溝38の外壁37は、前記した様に正面から見た形状が台形であり、両側の辺がテーパー状であるから、空気流路部材5を装着する際に空気導入開口15の内壁が嵌合用凹溝38外壁37のテーパに倣い、幅方向の位置決めが行われる。
空気流路部材5が炎孔部材3に対して正規の位置に納まると、図17に示すように空気流路部材5の開口近傍に設けられた凹溝77の外上端に嵌合用凹溝38内に設けられた突起95が係合し、「カチッ」という節度感が得られる。
また、空気流路部材5が正規の位置に装着されると、図31に示すように、燃焼部向空気放出開口23は、幅方向で炎孔部材3の炎孔群89と炎孔群89との間に位置することになる。
燃焼装置1の上流側端部(図面下端側)においては、空気流路部材5と中間部材6との間の隙間40は、嵌合用凹溝38の底壁36によって封鎖されている。従って空気流路部材5と中間部材6との間の隙間40は、直接的には基端側の外界と連通していない。
Air flow path members 5 are mounted on both sides of the intermediate member 6 as shown in FIGS. The air flow path member 5 is fixed to the intermediate member 6 by fitting the fitting concave groove 38 of the flame hole member 3 into the air introduction opening 15 on the proximal end side. That is, the outer wall 37 of the fitting groove 38 is inserted into the air introduction opening 15, and the projecting end of the air flow path member 5 is inserted into the fitting groove 38 and brought into contact with the bottom wall 36 of the fitting groove 38.
As described above, the outer wall 37 of the concave groove for fitting 38 is trapezoidal when viewed from the front, and the sides on both sides are tapered. Therefore, when the air flow path member 5 is mounted, the inner wall follows the taper over the fitting groove 38 outer wall 37, positioning in the width direction is performed.
When the air flow path member 5 is housed in a normal position with respect to the flame hole member 3, as shown in FIG. 17, the fitting concave groove 38 is formed on the outer upper end of the concave groove 77 provided near the opening of the air flow path member 5. The protrusion 95 provided inside engages and a feeling of moderation is obtained.
Further, when the air flow path member 5 is mounted at the proper position, as shown in FIG. 31, the air discharge opening 23 for the combusting portion has a flame hole group 89 and a flame hole group 89 of the flame hole member 3 in the width direction. Will be located between.
At the upstream end (the lower end in the drawing) of the combustion device 1, the gap 40 between the air flow path member 5 and the intermediate member 6 is sealed by the bottom wall 36 of the fitting groove 38. Therefore, the gap 40 between the air flow path member 5 and the intermediate member 6 does not directly communicate with the outside world on the base end side.

空気流路部材5と中間部材6(炎孔部材3)との間の隙間40に注目すると、図5,6の様に空気流路部材5の上流側空気放出開口48の側面側には、炎孔部材3の先端側絞り部78が位置する。先端側絞り部78は炎孔部材3の表面が凹んだ部位であるから、上流側空気放出開口48の近傍においては、空気流路部材5と炎孔部材3との間に隙間がある。
またこの隙間は、第一燃焼部46に連通している。即ち空気流路部材5の上流側空気放出開口48よりも先端側は、空気流路がテーパー状となっており、空気流路部材5の外壁は、下流に向かうほど空気流路の内側に位置し炎孔部材3との間に隙間が生じる。なお空気流路部材5の外壁と炎孔部材3とは、空気流路部材5に設けられた凸条73によって部分的に当接している。
When attention is paid to the gap 40 between the air flow path member 5 and the intermediate member 6 (flame hole member 3), the side surface side of the upstream air discharge opening 48 of the air flow path member 5 as shown in FIGS. The leading end side throttle portion 78 of the flame hole member 3 is located. Since the front-side throttle portion 78 is a portion where the surface of the flame hole member 3 is recessed, there is a gap between the air flow path member 5 and the flame hole member 3 in the vicinity of the upstream air discharge opening 48.
Further, this gap communicates with the first combustion portion 46. That is, the air flow path is tapered on the front end side of the air flow path member 5 from the upstream air discharge opening 48, and the outer wall of the air flow path member 5 is located inside the air flow path as it goes downstream. A gap is formed between the flame hole member 3 and the flame hole member 3. The outer wall of the air flow path member 5 and the flame hole member 3 are partially in contact with each other by a ridge 73 provided on the air flow path member 5.

空気流路部材5と中間部材6(炎孔部材3)が組み合わされた状態における炎孔部材3の炎孔群(中央側開口)89と、空気流路部材5の円形の先端部開口20,21及びスリット状の先端部開口63,64との位置関係は、図31の通りである。即ち、炎孔群89とスリット状の二次空気供給孔(先端部開口63,64)の位置は対応しており、先端部開口63,64のスリットを炎孔部材3に向けて延長すると、該延長線は炎孔群89の中心を通ることになる。なお、先端部開口63,64のスリットの長さは大小二種類あるが、スリットの長さにかかわらず、炎孔群89と先端部開口63,64は対応している。また幅方向で炎孔部材3の炎孔群89と炎孔群89との間に、円形の先端部開口20,21は位置することになる。   A flame hole group (center side opening) 89 of the flame hole member 3 in a state where the air flow path member 5 and the intermediate member 6 (flame hole member 3) are combined, and a circular tip opening 20 of the air flow path member 5; FIG. 31 shows the positional relationship between the slit 21 and the slit-shaped tip openings 63 and 64. That is, the positions of the flame hole group 89 and the slit-shaped secondary air supply holes (tip opening 63, 64) correspond to each other, and when the slit of the tip opening 63, 64 is extended toward the flame hole member 3, The extension line passes through the center of the flame hole group 89. There are two types of slit lengths in the tip openings 63 and 64, but the flame hole group 89 and the tip openings 63 and 64 correspond to each other regardless of the slit length. Further, the circular front end openings 20 and 21 are positioned between the flame hole group 89 and the flame hole group 89 of the flame hole member 3 in the width direction.

燃焼装置1は、前記した様にケース54に並列に並べて使用されるが、ケース54に装着した際に空気流路部材5の両側面に設けられた略三角形の突起80が、図23の様にケース54の一部と係合する。より具体的にはセットプレート100と称される断面「L」字状のバーがケース54の内面側に装着され、当該セットプレート100の水平面がケース54の内面側に突出する。そしてセットプレート100の水平面によって空気流路部材5の突起80の上面が押さえられ、燃焼装置1の抜け止めがなされる。   As described above, the combustion apparatus 1 is used in parallel with the case 54. When the combustion apparatus 1 is attached to the case 54, the substantially triangular projections 80 provided on both side surfaces of the air flow path member 5 are as shown in FIG. The case 54 is engaged with a part of the case 54. More specifically, a bar having an L-shaped cross section called a set plate 100 is attached to the inner surface side of the case 54, and the horizontal surface of the set plate 100 protrudes to the inner surface side of the case 54. The upper surface of the projection 80 of the air flow path member 5 is pressed by the horizontal surface of the set plate 100, and the combustion apparatus 1 is prevented from coming off.

次に燃焼装置1の機能について説明する。
燃焼装置1は、図3に示す様にケース54に多数配列され、図4の様に図面下部側から送風機41によって送風される。また燃料ガスがノズル(図示せず)によって予混合部材2のガス導入口43から導入される。
送風の流れは、前記した実施例と略同一であり、送風機41によって発生された送風は、整流板44(図4)の開口によって整流され、燃焼装置1の基端部(図面下側)から燃焼装置1の内部に入る。
燃焼装置1の中に入る送風のルートは、先の実施例と同一であり、3ルートである。即ち第一ルートは、図6に示すように空気流路部材5を通るルートであり、送風は空気流路部材5の基端部に設けられた空気導入開口15から空気流路部材5に入り、内部の空気流路13を先端側に向かって流れる。そして空気の大部分は、先端部開口20,21から外部に放出される。
Next, the function of the combustion apparatus 1 will be described.
A large number of combustion apparatuses 1 are arranged in a case 54 as shown in FIG. 3, and are blown by a blower 41 from the lower side of the drawing as shown in FIG. Further, the fuel gas is introduced from the gas introduction port 43 of the premixing member 2 by a nozzle (not shown).
The flow of the blast is substantially the same as that of the above-described embodiment, and the blast generated by the blower 41 is rectified by the opening of the rectifying plate 44 (FIG. 4), and from the base end (lower side of the drawing) of the combustion device 1. It enters the inside of the combustion apparatus 1.
The route of the air entering into the combustion apparatus 1 is the same as that in the previous embodiment, and there are three routes. That is, the first route is a route passing through the air flow path member 5 as shown in FIG. 6, and the air flow enters the air flow path member 5 from the air introduction opening 15 provided at the base end portion of the air flow path member 5. , Flows through the internal air flow path 13 toward the tip side. And most of the air is discharged to the outside through the tip openings 20 and 21.

ここで本実施例では、図20の示すように、空気流路部材5の先端形状が鋭角であり、且つ先端部開口の内、先端部開口63,64は、傾斜面16,17と頂部に渡って設けられたスリットであるから、先端部分で空気が滞留したり、乱流が生じたりしにくい。
例えば図21に示すように空気流路部材5の先端形状が円形であるならば、空気導入開口15から導入された空気が天井面たる円弧面と衝突し、円弧面に沿って基端側に回り込む。そして回り込んだ空気が矢印の様に新たに供給された空気流と衝突し、新たに供給される空気の放出を阻害して放出方向を歪める。この様に空気流路部材5の先端形状を円形にすると乱流や渦の発生によって空気流の方向が不安定となる。そのため二次火炎が揺らぐと言う不具合が生じる。また本発明者らの実験によると、騒音が高いという不具合もある。
Here, in this embodiment, as shown in FIG. 20, the tip shape of the air flow path member 5 is an acute angle, and the tip opening 63, 64 of the tip opening is formed on the inclined surfaces 16, 17 and the top. Since the slits are provided across the air, it is difficult for air to stay at the tip portion or to cause turbulence.
For example, as shown in FIG. 21, if the tip shape of the air flow path member 5 is circular, the air introduced from the air introduction opening 15 collides with the arcuate surface that is the ceiling surface, and moves toward the base end side along the arcuate surface. Wrap around. Then, the sneak-in air collides with the newly supplied air flow as shown by an arrow, and inhibits the discharge of the newly supplied air to distort the discharge direction. In this way, when the tip shape of the air flow path member 5 is circular, the direction of the air flow becomes unstable due to the generation of turbulence and vortices. For this reason, a problem that the secondary flame fluctuates occurs. Further, according to the experiments by the present inventors, there is a problem that the noise is high.

これに対して本実施形態では、図20に示すように先端部が鋭角であるから、供給された空気が衝突する部位が少なく、空気の回り込みが少ない。またスリット状の開口が傾斜面に設けられているから、傾斜面に衝突する空気の多くはスリット状の開口から外部に放出される。そのため空気の放出方向が安定し、二次火炎の揺らぎが少なくなる。また騒音についても低下する。ただし本発明は、空気流路部材の先端形状を限定するものではなく、図21の様な先端形状が円形のものであってもよい。   On the other hand, in this embodiment, since the tip portion has an acute angle as shown in FIG. 20, there are few portions where the supplied air collides, and the air does not wrap around. Further, since the slit-shaped opening is provided on the inclined surface, most of the air that collides with the inclined surface is discharged to the outside from the slit-shaped opening. For this reason, the air discharge direction is stabilized, and the fluctuation of the secondary flame is reduced. Noise is also reduced. However, the present invention does not limit the tip shape of the air flow path member, and the tip shape as shown in FIG. 21 may be circular.

実施例の説明に戻ると、本実施例の燃焼装置1では、空気流路部材5を流れる空気の一部は、燃焼部向空気放出開口23と空気放出開口(上流側空気放出開口)48からも放出される。
燃焼部向空気放出開口23から放出された空気は、段部の傾斜面22から、炎孔部材3の炎孔群89と炎孔群89との間に向けて、燃焼装置1の軸線に対して斜め前方に放出される。
また空気放出開口(上流側空気放出開口)48から放出された空気は、空気流路部材5と中間部材6との間の隙間40を流れ、炎孔部材3の側面部に至る。具体的には空気放出開口(上流側空気放出開口)48から放出された空気は、炎孔部材3の先端側絞り部78とによって構成される空隙に放出される。そしてこの空気は、空気流路部材5のテーパー状の壁面によって形成される隙間を流れ、炎孔部材3の側面部に放出される。
Returning to the description of the embodiment, in the combustion apparatus 1 of this embodiment, a part of the air flowing through the air flow path member 5 flows from the air discharge opening 23 for the combustion section and the air discharge opening (upstream air discharge opening) 48. Are also released.
The air discharged from the air discharge opening 23 for the combustion part is directed from the inclined surface 22 of the step part between the flame hole group 89 and the flame hole group 89 of the flame hole member 3 with respect to the axis of the combustion device 1. Is released diagonally forward.
Further, the air discharged from the air discharge opening (upstream air discharge opening) 48 flows through the gap 40 between the air flow path member 5 and the intermediate member 6 and reaches the side surface portion of the flame hole member 3. Specifically, the air discharged from the air discharge opening (upstream air discharge opening) 48 is discharged into a gap formed by the front end side throttle portion 78 of the flame hole member 3. This air flows through a gap formed by the tapered wall surface of the air flow path member 5 and is released to the side surface portion of the flame hole member 3.

第二のルートは、中間部材6の中を流れるルートであり、予混合部材2と炎孔部材3の側壁部31,32との間に開口部28から空気が侵入する。
この空気は、炎孔部材3の内面に形成された凹溝93(凸条92の裏側)を通過して
混合空間39に入る。そして開口列部10と炎孔部材3の頂面30部分の間の空間47に入る。即ち上記した空気は、炎孔上流側流路49を流れる。そして炎孔(中央側開口)33たるスリットから第一燃焼部46に放出される。また空間47に入った空気の一部は、本体部材25の側壁部に設けられた開口35から本体部材25と側壁部31,32との間の空隙29に入り、側面側開口27から第一燃焼部46に放出される。
The second route is a route that flows through the intermediate member 6, and air enters between the premixing member 2 and the side wall portions 31 and 32 of the flame hole member 3 from the opening 28.
This air passes through a concave groove 93 formed on the inner surface of the flame hole member 3 (the back side of the ridge 92) and enters the mixing space 39. And it enters the space 47 between the opening row | line | column part 10 and the top face 30 part of the flame hole member 3. FIG. That is, the above-described air flows through the flame hole upstream flow path 49. Then, the gas is discharged from the slit serving as the flame hole (center side opening) 33 to the first combustion unit 46. Part of the air that has entered the space 47 enters the space 29 between the main body member 25 and the side wall portions 31 and 32 from the opening 35 provided in the side wall portion of the main body member 25, and the first side through the side surface side opening 27. It is discharged to the combustion unit 46.

次に、空気の第三のルートについて説明する。第三のルートは、一次空気のルートであり、予混合部材2のガス導入口43から燃料ガスと共に導入される。第三のルートは、燃料ガスが流れるルートと同一であるから、以下は燃料ガスの流れとして説明する。燃料ガスの流れは実線の矢印で図示する。   Next, the third route of air will be described. The third route is a route for primary air, and is introduced from the gas introduction port 43 of the premixing member 2 together with the fuel gas. Since the third route is the same as the route through which the fuel gas flows, the following description will be given as the flow of the fuel gas. The flow of fuel gas is illustrated by solid arrows.

予混合部材2のガス導入口43からは一次空気と共に燃料ガスが導入され、混合部7等で空気と混合され、開口列部10に流れ込む。ここで本実施例では、混合部7の均一断面部57から開口列部10にかけての間に絞りとなる部位がない。従って燃料ガスは、突出して流速が異なる部分が無く開口列部10に入る。
開口列部10に入った燃料ガスは、各開口8から均等に放出される。即ち開口列部10は、相当の内容積を持つので予混合部材2の曲路等で発生した微小な渦は収斂している。また前記した様に開口列部10の直前に絞りとなる部位が無く、開口列部10に導入される燃料ガスは、流路の断面における流速のばらつきが小さい。そのため開口列部10の内部における圧力ばらつきは少なく、燃料ガスは、各開口8から均等に放出される。
The fuel gas is introduced together with the primary air from the gas introduction port 43 of the premixing member 2, mixed with air by the mixing unit 7 and the like, and flows into the opening row unit 10. Here, in the present embodiment, there is no portion that becomes a diaphragm between the uniform section 57 of the mixing portion 7 and the opening row portion 10. Therefore, the fuel gas protrudes into the opening row portion 10 without any portion where the flow velocity is different.
The fuel gas that has entered the opening row 10 is evenly discharged from each opening 8. That is, since the opening row portion 10 has a considerable internal volume, minute vortices generated in the curved path of the premixing member 2 are converged. Further, as described above, there is no portion to be throttled immediately before the opening row portion 10, and the fuel gas introduced into the opening row portion 10 has a small variation in flow velocity in the cross section of the flow path. Therefore, there is little pressure variation in the inside of the opening row | line | column part 10, and fuel gas is discharge | released from each opening 8 equally.

開口列部10の開口8から放出された燃料ガスは、炎孔部材3の中間膨出部91によって構成される混合空間39に入り、炎孔上流側流路(混合空間39を含む)49を流れる空気と混合される。   The fuel gas discharged from the opening 8 of the opening row portion 10 enters the mixing space 39 constituted by the intermediate bulging portion 91 of the flame hole member 3, and passes through the flame hole upstream flow path (including the mixing space 39) 49. Mixed with flowing air.

一方、混合空間39を流れる空気は、図面下側から上方向に流れるものであり、整流されたものである。
即ち混合空間39に流れ込む空気は、予混合部材2と炎孔部材3の側壁部31,32との間の開口部28から導入されるものであるが、混合空間39に至る前に炎孔部材3の内面に形成された凹溝93(凸条92の裏側)を通過しているので、層流となっている。
より詳細に説明すると、本実施例では、炎孔部材3の基端部側絞り部79においては、大半の部位が予混合部材2の外壁と接しているが、基端部側絞り部79の内面には多数の凹溝93が形成されており、凹溝93の部位については空隙がある。そして各凹溝93は、混合空間39と連通している。そのため側壁部31,32との間の開口部28から導入された空気は、複数の凹溝93を通過し、混合空間39に至る。そして凹溝93は、細長い流路であり、且つ等間隔であって平行に設けられているので、導入された空気は、複数の凹溝93を流れることによって整流される。
On the other hand, the air flowing through the mixing space 39 flows upward from the lower side of the drawing and is rectified.
That is, the air flowing into the mixing space 39 is introduced from the opening 28 between the premixing member 2 and the side wall portions 31 and 32 of the flame hole member 3, but before reaching the mixing space 39, the flame hole member Since it passes through the concave groove 93 (the back side of the ridge 92) formed in the inner surface of No. 3, it is a laminar flow.
More specifically, in this embodiment, most of the portion of the base end side throttle portion 79 of the flame hole member 3 is in contact with the outer wall of the premixing member 2. A large number of concave grooves 93 are formed on the inner surface, and there are gaps in the concave groove 93 portions. Each groove 93 communicates with the mixing space 39. Therefore, the air introduced from the opening 28 between the side walls 31 and 32 passes through the plurality of concave grooves 93 and reaches the mixing space 39. And since the ditch | groove 93 is an elongate flow path and is provided in parallel at equal intervals, the introduce | transduced air is rectified by flowing through the some ditch | groove 93. FIG.

炎孔上流側流路(混合空間39を含む)49を流れる空気は、燃焼装置1の高さ方向に流れるのに対し、開口列部10の開口8から放出された燃料ガスは空気の流れに対して垂直方向に流れ込む。そのため開口列部10の開口8から放出された燃料ガスは、混合空間39の部位でも空気と激しく衝突し、空気との混合が促進される。
加えて本実施例では、凹溝93(凸条92の裏側)の延長線上に開口列部10の開口8があるから、凹溝93を出た空気はより確実に開口8から放出された燃料ガスと衝突する。
また混合空間39は、開口列部10の長手方向全域に渡って連通しているから、圧力も平滑化される。
The air flowing through the flame hole upstream side flow path (including the mixing space 39) 49 flows in the height direction of the combustion apparatus 1, whereas the fuel gas discharged from the opening 8 of the opening row portion 10 becomes the flow of air. In contrast, it flows vertically. Therefore, the fuel gas discharged from the opening 8 of the opening row portion 10 collides violently with the air even at the portion of the mixing space 39, and the mixing with the air is promoted.
In addition, in the present embodiment, since the opening 8 of the opening row portion 10 is on the extension line of the concave groove 93 (the back side of the ridge 92), the air that has exited the concave groove 93 is more reliably released from the opening 8. Collide with gas.
Further, since the mixing space 39 communicates over the entire longitudinal direction of the opening row portion 10, the pressure is also smoothed.

燃料ガスは、混合空間39を通過して上昇し、先端側膨出部90によって構成される空間に流れ込むが、この間においても燃料ガスと空気との混合は促進される。そして燃料ガスの大部分が炎孔33たるスリットから第一燃焼部46に放出される。
スリットから放出される燃料ガスは、予混合部材2の中で空気と混合され、さらに混合空間39内で空気と混合されるので均質であり、且つスリットから放出される時の速度も均一である。
空間47に入った空気の一部は、本体部材25の側壁部に設けられた開口35から本体部材25と側壁部31,32との間の空隙29に入り、側面側開口27から第一燃焼部46に放出される。
The fuel gas rises through the mixing space 39 and flows into the space formed by the tip-side bulging portion 90, but the mixing of the fuel gas and air is also promoted during this time. Most of the fuel gas is discharged from the slit that is the flame hole 33 to the first combustion section 46.
The fuel gas discharged from the slit is mixed with air in the premixing member 2 and further mixed with air in the mixing space 39, so that the fuel gas is uniform and the speed when discharged from the slit is also uniform. .
Part of the air that has entered the space 47 enters the gap 29 between the main body member 25 and the side wall portions 31 and 32 from the opening 35 provided in the side wall portion of the main body member 25, and first combustion from the side surface side opening 27. Released to the part 46.

燃料ガスに点火すると、燃料ガスは、第一燃焼部46で一次火炎を発生させ、一次燃焼が行われる。そして未燃成分は、第一燃焼部46の開口から外部に放出され、空気流路部材5の先端部から空気が供給されて二次燃焼する。
本実施例では、炎孔部材3の炎孔群(中央側開口)89とスリット状の二次空気供給孔(先端部開口63,64)の位置は対応しており、炎孔群89のスリットの延長線上の側面部分に先端部開口63,64が設けられているから、未燃成分が多く排出される部位に、より多くの二次空気が供給され、効率がよい。
When the fuel gas is ignited, the fuel gas generates a primary flame in the first combustion unit 46, and primary combustion is performed. The unburned component is discharged to the outside from the opening of the first combustion unit 46, and air is supplied from the tip of the air flow path member 5 to perform secondary combustion.
In the present embodiment, the positions of the flame hole group (center side opening) 89 of the flame hole member 3 and the slit-like secondary air supply holes (tip end openings 63 and 64) correspond to each other. Since the front end openings 63 and 64 are provided in the side surface portion on the extension line, more secondary air is supplied to the portion where a lot of unburned components are discharged, and the efficiency is high.

また本実施例では、前記した一次火炎の基端部に空気が供給され、一次火炎の基端部に保炎が発生する。
即ち本実施例では、燃料ガスの一部が側面側開口27から第一燃焼部46に放出される。ただし、側面側開口27から放出される燃料ガスはスリットから放出される燃料ガスに比べて流速が遅い。即ち燃料ガスは、本体部材25の側壁部に設けられた開口35から本体部材25と側壁部31,32との間の空隙29に入り、側面側開口27から第一燃焼部46に放出される。そのため空隙29に入る燃料ガスは量が制限され、側面側開口27から放出される量は少ない。これに対して側面側開口27は大きな開口面積を持つので、側面側開口27から放出される燃料ガスは流速が遅いものとなる。
In this embodiment, air is supplied to the base end portion of the primary flame described above, and flame holding occurs at the base end portion of the primary flame.
That is, in this embodiment, part of the fuel gas is discharged from the side opening 27 to the first combustion unit 46. However, the fuel gas discharged from the side opening 27 has a slower flow rate than the fuel gas discharged from the slit. That is, the fuel gas enters the gap 29 between the main body member 25 and the side wall portions 31 and 32 from the opening 35 provided in the side wall portion of the main body member 25, and is released from the side surface side opening 27 to the first combustion portion 46. . Therefore, the amount of fuel gas entering the gap 29 is limited, and the amount released from the side opening 27 is small. On the other hand, since the side opening 27 has a large opening area, the fuel gas discharged from the side opening 27 has a low flow velocity.

さらに前記した様に、空気流路部材5の中を通過する空気の一部が、側面側開口27から放出される燃料ガスに供給されて完全燃焼する。
即ち空気放出開口(上流側空気放出開口)48から放出された空気は、炎孔部材3の先端側絞り部78とによって構成される空隙から空気流路部材5のテーパー状の壁面によって形成される隙間に沿って流れ、炎孔部材3の側面部に至る。
Further, as described above, a part of the air passing through the air flow path member 5 is supplied to the fuel gas discharged from the side opening 27 and is completely burned.
That is, the air discharged from the air discharge opening (upstream air discharge opening) 48 is formed by the tapered wall surface of the air flow path member 5 from the gap formed by the tip side narrowed portion 78 of the flame hole member 3. It flows along the gap and reaches the side surface of the flame hole member 3.

前記した様に燃料ガスの流速が低いことと相まって側面側開口27の近傍には、安定した保炎が発生する。そのため一次火炎の基端部は側面側開口27の近傍に発生する小さな炎によって保持される。   As described above, stable flame holding is generated in the vicinity of the side opening 27 in combination with the low flow rate of the fuel gas. Therefore, the base end portion of the primary flame is held by a small flame generated in the vicinity of the side opening 27.

また本実施例においても、傾斜面22に設けられた燃焼部向空気放出開口23から斜め方向に空気が供給され、第一燃焼部46の内の未燃ガスの一部が燃焼を開始し、一部に二次火炎が生じる。そしてこの二次火炎は外部の二次火炎と繋がる。
さらに本実施例では、炎孔部材3の炎孔群89と炎孔群89との間に空気が放出されるため、炎孔群89の周囲には空気が十分に供給されており、一次火炎を確実に保炎することができる。
また本実施例においても燃焼部向空気放出開口23から供給された空気は、一次火炎や未燃ガスの流れを妨げることなく、二次火炎は空気流路部材5から離れた位置で発生し、空気流路部材5を過度に加熱しない。
そのため本実施例の燃焼装置は、一次火炎及び二次火炎が共に安定し、実用的である。
Also in this embodiment, air is supplied in an oblique direction from the combustion part air discharge opening 23 provided on the inclined surface 22, and a part of the unburned gas in the first combustion part 46 starts to burn, A secondary flame is generated in part. This secondary flame is connected to an external secondary flame.
Further, in the present embodiment, since air is released between the flame hole group 89 and the flame hole group 89 of the flame hole member 3, the air is sufficiently supplied around the flame hole group 89, and the primary flame. The flame can be reliably held.
Also in the present embodiment, the air supplied from the air discharge opening 23 for the combustion section does not interfere with the flow of the primary flame and unburned gas, and the secondary flame is generated at a position away from the air flow path member 5. The air flow path member 5 is not heated excessively.
Therefore, the combustion apparatus of the present embodiment is practical because both the primary flame and the secondary flame are stable.

上記した実施形態では、空気流路部材5の側面であって、先端側の第一燃焼部構成部62を構成する壁面には、高さ方向に延びる凹溝70,71を設けた。この凹溝70,71は、空気流路部材5を補強する効果があり、推奨される構成である。即ち空気流路部材5の側面は、第一燃焼部構成部62の一面を構成する部位であるから高温に晒される。そのため当該部は熱によって変形しやすい。そこで本実施例では、第一燃焼部構成部62の壁面に凹溝70,71を設け、壁面の剛性を向上させた。
この構成は、推奨される構成であるが、本発明に必須ではない。
In the embodiment described above, the grooves 70 and 71 extending in the height direction are provided on the side wall of the air flow path member 5 and on the wall surface forming the first combustion portion constituting portion 62 on the front end side. The concave grooves 70 and 71 have an effect of reinforcing the air flow path member 5 and are a recommended configuration. That is, the side surface of the air flow path member 5 is a part constituting one surface of the first combustion part constituting part 62 and is exposed to a high temperature. Therefore, the part is easily deformed by heat. Therefore, in this embodiment, the concave grooves 70 and 71 are provided on the wall surface of the first combustion section constituting section 62 to improve the rigidity of the wall surface.
This configuration is a recommended configuration, but is not essential to the present invention.

上記した構成に変わって凹溝70,71の位置にスリットを設けてもよい。
当該位置にスリットを設けると、図24に示すように第一燃焼部46に二次空気が供給され、第一燃焼部46の内の未燃ガスの一部が燃焼を開始し、一部に二次火炎が生じる。そしてこの二次火炎は外部の二次火炎と繋がる。
Instead of the above-described configuration, a slit may be provided at the position of the concave grooves 70 and 71.
When the slit is provided at the position, secondary air is supplied to the first combustion section 46 as shown in FIG. 24, and a part of the unburned gas in the first combustion section 46 starts to be burned. A secondary flame is generated. This secondary flame is connected to an external secondary flame.

ここで、空気流路部材5の側面であって、先端側の第一燃焼部構成部62を構成する壁面にスリット等の開口を設ける場合には、図25,26に示すように両端のスリット101を中央のスリット102よりも長く設計することが望ましい。
即ち図25に示す例では、端部に二つのスリット103,104が直列に設けられ、全体としてのスリット101の全長は中央側のどのスリット102よりも長い。
図26に示す実施例では、端部のスリット101は一本であり、この一本のスリット101の長さが中央側のどのスリット102よりも長い。
Here, when an opening such as a slit is provided on the side wall of the air flow path member 5 and constituting the first combustion portion constituting portion 62 on the tip end side, as shown in FIGS. It is desirable to design 101 longer than the central slit 102.
That is, in the example shown in FIG. 25, two slits 103 and 104 are provided in series at the end, and the overall length of the slit 101 as a whole is longer than any slit 102 on the center side.
In the embodiment shown in FIG. 26, there is one slit 101 at the end, and the length of this one slit 101 is longer than any slit 102 on the center side.

図25,26に示すように両端側のスリット101を他のスリット102よりも長くすると、燃焼装置1の第一燃焼部46の両端にエアカーテンが生じ、燃料ガスや燃焼後のガスが外部(横方向)に洩れることが防がれる。   When the slits 101 at both ends are made longer than the other slits 102 as shown in FIGS. 25 and 26, air curtains are generated at both ends of the first combustion unit 46 of the combustion apparatus 1, and the fuel gas and the gas after combustion are external ( Leakage in the lateral direction is prevented.

また燃焼装置1をケース54に装着する際の工夫として、図27,28,29に示すようにケース54の内周面であって壁面106の近傍にパッキン105を設けることが推奨される。
パッキン105は、図28、29に示すように燃焼装置1の幅方向の両端であって、空気流路部材5の基端部と当接する。そのため燃焼装置1の両端部における空気流路部材5と炎孔部材3との密着性が向上する。また燃焼装置1の幅方向の両端側からの予期しない空気の回り込みが阻止される。そのため一次火炎に供給される空気量の制御が容易となる。
Further, as a device for attaching the combustion apparatus 1 to the case 54, it is recommended to provide a packing 105 on the inner peripheral surface of the case 54 and in the vicinity of the wall surface 106 as shown in FIGS. 27, 28, and 29.
As shown in FIGS. 28 and 29, the packing 105 is in contact with the proximal end portion of the air flow path member 5 at both ends in the width direction of the combustion apparatus 1. Therefore, the adhesion between the air flow path member 5 and the flame hole member 3 at both ends of the combustion apparatus 1 is improved. Further, unexpected air wraparound from both ends in the width direction of the combustion apparatus 1 is prevented. Therefore, it becomes easy to control the amount of air supplied to the primary flame.

上記した各実施例では、図8の様に空気流路部材5は、空気導入開口15から先端部側に向かう流路を構成するものであるが、側壁の一部にテーパ部を有し、テーパー部の末端部分と第一燃焼部構成部62との境界部分に、膨出部84が設けられている。
この膨出部84は、テーパー部と、膨出部84の外壁側とを繋ぐために必然的にできる形状である。即ち上記した実施例では、炎孔部材3の近傍に空気を供給するための流路を形成されるために、空気流路部材5の側面にテーパ部が形成されている。上記した空気流路を多くする為には、テーパ部の傾斜は強い方が好ましい。即ちテーパー部の傾斜が強いと炎孔部材3の外壁との間の隙間が大きくなり、炎孔部材3の近傍に空気を供給するための流路が広くなる。
一方、炎孔部材3の側面部に層流状態の空気を流すためには、炎孔部材3の先端近傍では流路の壁面が平行であることが望ましい。
この二つの条件を満足させるために、空気流路部材5の外面部にテーパ部と平行壁面部とを作る必要が生じ、膨出部84が設計された。
In the embodiments described above, the air passage member 5 as in FIG. 8, but constitutes a flow path extending from the air inlet opening 15 at the distal end side, has a tapered over part to part of the side wall A bulging portion 84 is provided at a boundary portion between the end portion of the tapered portion and the first combustion portion constituting portion 62.
The bulging portion 84 has a shape that is inevitably formed in order to connect the tapered portion and the outer wall side of the bulging portion 84. Namely, in the above embodiment, in order to be a flow path for supplying air to the vicinity of the burner port member 3, tapered over portion is formed on the side surface of the air passage member 5. To increase the air flow path described above, the inclination of the tapered over part stronger the better. That gap between the inclination of the tapered over part is strong and the outer wall of the burner port member 3 is increased, a flow path for supplying air is widened in the vicinity of the burner port member 3.
On the other hand, in order to flow laminar air on the side surface of the flame hole member 3, it is desirable that the wall surface of the flow path be parallel in the vicinity of the tip of the flame hole member 3.
To satisfy these two conditions, the outer surface portion of the air passage member 5 is necessary to make the tapered over part parallel wall portion occurs, the bulging portion 84 is designed.

しかしながら、膨出部84は、流路の断面形状が大きく変化する部位であるから、当該部位で渦が生じ、渦の影響を受けて空気流路部材5の先端部から放出される二次空気の流れが乱れる懸念がある。
そこで渦の影響が無視できない場合は、膨出部とテーパー部との段差を極力小さくするとよい。
例えば図30に示すように、膨出部とテーパー部との段差を無くする構成も考えられる。図30に示す空気流路部材110では、膨出部に相当する部位111が炎孔部材の側面と略平行状態に面する。そして先の実施例と同様にしてその間に空気流路を形成する。
空気流路部材110の内面における部位はその上流側のテーパ掛かった部位112と連続的な平面で連続している。即ち両者の間に段差はない。
However, since the bulging part 84 is a part where the cross-sectional shape of the flow path changes greatly, a vortex is generated in the part, and the secondary air discharged from the front end part of the air flow path member 5 under the influence of the vortex. There is a concern that the flow will be disturbed.
Therefore, when the influence of the vortex cannot be ignored, the step between the bulging portion and the tapered portion should be made as small as possible.
For example, as shown in FIG. 30, the structure which eliminates the level | step difference of a bulging part and a taper part is also considered. In the air flow path member 110 shown in FIG. 30, a portion 111 corresponding to the bulging portion faces a state substantially parallel to the side surface of the flame hole member. Then, an air flow path is formed between them as in the previous embodiment.
A portion on the inner surface of the air flow path member 110 is continuous with a tapered portion 112 on the upstream side in a continuous plane. That is, there is no step between the two.

本実施例の空気流路部材110についても第一燃焼部46の基端部分に相当する部位に段部がありこの段部も傾斜面22に燃焼部向空気放出開口23が設けられている。
燃焼部向空気放出開口23の中心同士の間隔をHとし、円滑に形成された壁面の長さLとしたとき、「0.5H<L<4H」の関係であることが推奨される。
Also in the air flow path member 110 of this embodiment, a step portion is provided at a portion corresponding to the base end portion of the first combustion portion 46, and this step portion is also provided with an air discharge opening 23 for the combustion portion on the inclined surface 22.
It is recommended that the relationship of “0.5H <L <4H” be established, where H is the distance between the centers of the air discharge openings 23 for the combustion section and the length L of the smoothly formed wall surface.

図2以下に示す実施例では、各部材の表面に多数の凹凸形状が設けられている。凹凸形状は流路を構成する機能の他、板体の剛性を向上させる機能を果たす。また流路を構成しない凹凸形状は、板体の剛性を向上させる機能のみを果たす。   In the embodiment shown in FIG. 2 and subsequent figures, a number of uneven shapes are provided on the surface of each member. The uneven shape fulfills the function of improving the rigidity of the plate body in addition to the function of constituting the flow path. Further, the uneven shape that does not constitute the flow path only fulfills the function of improving the rigidity of the plate.

上記した各実施例では、金属板同士の隙間によって一連の流路を構成している。すなわち一方又は双方の板に凹部を設け、他方の板との間に隙間を形成している。ここで流路を形成する際にいずれの板に凹溝等を設けるかは設計事項の一つであり、本発明は上記した実施例に限定されるものではない。例えば上記した実施例では、空気の第2ルートの一部に、炎孔部材3の内面と予混合部材の外周面との間を通過する流路があり、炎孔部材3の内面に凹溝93を設けて流路を確保した。しかしながら、逆に予混合部材側に凹溝等を設けて流路を構成してもよい。   In each of the above-described embodiments, a series of flow paths is formed by the gaps between the metal plates. That is, one or both plates are provided with a recess, and a gap is formed between the other plate. Here, it is one of the design matters to determine which plate is provided with the groove when forming the flow path, and the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, a part of the second route of the air has a flow path that passes between the inner surface of the flame hole member 3 and the outer peripheral surface of the premixing member. 93 was provided to secure the flow path. However, conversely, the flow path may be configured by providing a groove or the like on the premixing member side.

本発明の燃焼装置の構造を模式的に説明した燃焼装置の断面斜視図。The cross-sectional perspective view of the combustion apparatus which demonstrated the structure of the combustion apparatus of this invention typically. 本発明の実用的な実施例における燃焼装置の斜視図。The perspective view of the combustion apparatus in the practical Example of this invention. 図2の燃焼装置をケースに収納した場合の平面図。The top view at the time of accommodating the combustion apparatus of FIG. 2 in a case. 図3のA−A断面図。AA sectional drawing of FIG. 図2の燃焼装置の断面図。Sectional drawing of the combustion apparatus of FIG. 図2の燃焼装置を段階的に破断して内部構造を示した斜視図。The perspective view which fractured | ruptured the combustion apparatus of FIG. 2 in steps, and showed the internal structure. 図2の燃焼装置の分解斜視図。The disassembled perspective view of the combustion apparatus of FIG. 図2の燃焼装置の分解断面図。FIG. 3 is an exploded cross-sectional view of the combustion apparatus of FIG. 2. 図2の燃焼装置の予備混合部材の斜視図。FIG. 3 is a perspective view of a premixing member of the combustion apparatus of FIG. 2. 図9のA−A断面図。AA sectional drawing of FIG. 図9のB−B断面図。BB sectional drawing of FIG. 図2の燃焼装置の空気流路部材の斜視図。The perspective view of the air flow path member of the combustion apparatus of FIG. 図12の空気流路部材の凹変部の拡大図。The enlarged view of the concave change part of the air flow path member of FIG. 図2の燃焼装置の炎孔部材の斜視図。The perspective view of the flame hole member of the combustion apparatus of FIG. 図14の炎孔部材の嵌合用凹溝部の正面拡大図。FIG. 15 is an enlarged front view of the fitting groove portion of the flame hole member of FIG. 14. 炎孔部材と予混合部材とを結合した状態の側面図。The side view of the state which combined the flame hole member and the premixing member. 図16の炎孔部材の基端部近傍の拡大図。The enlarged view of the base end part vicinity of the flame hole member of FIG. 予混合部材の開口と空気流路部材の凸条との位置関係を示す説明図。Explanatory drawing which shows the positional relationship of the opening of a premixing member, and the protruding item | line of an air flow path member. 他の実施例における予混合部材の開口と空気流路部材の凸条との位置関係を示す説明図。Explanatory drawing which shows the positional relationship of the opening of the premixing member in another Example, and the protrusion of an air flow path member. 本実施例における空気流路部材内における空気の流れを示す説明図。Explanatory drawing which shows the flow of the air in the air flow path member in a present Example. 他の実施例における空気流路部材内における空気の流れを示す説明図。Explanatory drawing which shows the flow of the air in the air flow-path member in another Example. 本実施例における燃焼装置の平面図及び手前側の空気流路部材を取り外した状態における燃焼装置の正面図。The top view of the combustion apparatus in a present Example, and the front view of the combustion apparatus in the state which removed the air flow path member of the near side. 本実施例の燃焼装置の端部とケースに設けられたセットプレートとの関係を示す説明図。Explanatory drawing which shows the relationship between the edge part of the combustion apparatus of a present Example, and the set plate provided in the case. 本発明の他の実施例における燃焼装置の断面図。Sectional drawing of the combustion apparatus in the other Example of this invention. 本発明の他の実施例における燃焼装置の手前側の空気流路部材を取り外した状態における部分正面図。The partial front view in the state which removed the air flow path member of the near side of the combustion apparatus in the other Example of this invention. 本発明のさらに他の実施例における燃焼装置の手前側の空気流路部材を取り外した状態における部分正面図。The partial front view in the state which removed the air flow path member of the near side of the combustion apparatus in the further another Example of this invention. ケースと燃焼装置との位置関係を示すケースの平面図。The top view of a case which shows the positional relationship of a case and a combustion apparatus. ケースと燃焼装置との位置関係を示す断面図。Sectional drawing which shows the positional relationship of a case and a combustion apparatus. ケースと燃焼装置との位置関係を示す斜視図。The perspective view which shows the positional relationship of a case and a combustion apparatus. 本発明のさらに他の実施例で採用する空気流路部材の要部の断面図。Sectional drawing of the principal part of the air flow path member employ | adopted by the further another Example of this invention. 炎孔部材の炎孔群と空気流路部材の開口との位置関係を示す部分拡大平面図。The partial enlarged plan view which shows the positional relationship of the flame hole group of a flame hole member, and the opening of an air flow path member.

1 燃焼装置(二段燃焼装置)
2 予混合部材
3 炎孔部材
5 空気流路部材
6 中間部材
8 開口
10 開口列部
13 空気流路
15 空気導入開口
20 21 先端部開口
23 燃焼部向空気放出開口
25 本体部材
26 減圧壁
27 側面側開口
29 空隙
31, 32 側壁部
35 開口
39 混合空間
46 第一燃焼部
48 空気放出開口(上流側空気放出開口)
49 炎孔上流側流路
66,67 傾斜面
68 スリット状の開口
69 スリット状の開口
1 Combustion device (two-stage combustion device)
2 Premixing member 3 Flame hole member 5 Air flow path member 6 Intermediate member 8 Opening 10 Opening row part 13 Air flow path 15 Air introduction opening 20 21 Front end opening 23 Combustion part air discharge opening 25 Main body member 26 Decompression wall 27 Side surface Side opening 29 Gap 31, 32 Side wall 35 Opening 39 Mixing space 46 First combustion part 48 Air discharge opening (upstream air discharge opening)
49 Flame-hole upstream flow path 66, 67 Inclined surface 68 Slit-shaped opening 69 Slit-shaped opening

Claims (10)

炎孔部材と、空気流路部材とを備え、前記空気流路部材は壁状であって先端側に空気放出開口を有し、炎孔部材は二枚の空気流路部材の間或いは前記空気流路部材と他の壁面との間に配置され、炎孔部材と空気流路部材によって囲まれた空間によって第一燃焼部が形成され、酸素不足の状態の燃料ガスが炎孔部材から第一燃焼部に放出されて燃焼し、さらに空気流路部材の空気放出開口から空気の供給を受けて燃焼する二段燃焼装置であって、
前記空気流路部材は、基端部から高さ方向先端側に向かって、導入部と、中間部と、第一燃焼部構成部と、の領域に分かれており、
導入部と中間部との境界近傍に上流側空気放出開口が設けられており、
炎孔部材の側面側に別途空気が供給されるものであり、
空気流路部材の少なくとも一方の壁面であって且つ中間部に、空気の流れ方向に対して平行に向いた凸条が形成されており、
前記凸条は、炎孔部材の外面と当接して両者の間に隙間を設けるものであり、
前記隙間に上流側空気放出開口から供給された空気が流れるものであることを特徴とする二段燃焼装置。
A flame hole member and an air flow path member, and the air flow path member is wall-shaped and has an air discharge opening on the tip side, and the flame hole member is located between the two air flow path members or the air A first combustion section is formed by a space that is disposed between the flow path member and another wall surface and is surrounded by the flame hole member and the air flow path member, and oxygen-deficient fuel gas is discharged from the flame hole member to the first. A two-stage combustion apparatus that is discharged to the combustion section and burns, and further burns by receiving air supply from an air discharge opening of the air flow path member;
The air flow path member is divided into regions of an introduction portion, an intermediate portion, and a first combustion portion constituting portion from the base end portion toward the height direction distal end side,
An upstream air discharge opening is provided in the vicinity of the boundary between the introduction part and the intermediate part,
The side surface of the burner port member is shall be separately supplied with air,
Convex ridges are formed on at least one wall surface of the air flow path member and parallel to the air flow direction in the intermediate portion,
The ridge is in contact with the outer surface of the flame hole member to provide a gap between them,
The two-stage combustion apparatus, wherein air supplied from an upstream air discharge opening flows through the gap .
炎孔部材と、二以上の空気流路部材とを備え、前記空気流路部材は壁状であって先端側に空気放出開口を有し、炎孔部材は前記空気流路部材の間に配置され、炎孔部材と空気流路部材によって囲まれた空間によって第一燃焼部が形成され、酸素不足の状態の燃料ガスが炎孔部材から第一燃焼部に放出されて燃焼し、さらに空気流路部材の空気放出開口から空気の供給を受けて燃焼する二段燃焼装置であって、
空気流路部材の第一燃焼部を構成する部位又はそれよりも上流側に上流側空気放出開口が設けられ、当該上流側空気放出開口から放出された空気が炎孔部材の側面側に流れるものであり、
空気流路部材の少なくとも一方の壁面に、空気の流れ方向に対して平行に向いた凸条が形成されており、
前記凸条は、炎孔部材の外面と当接して両者の間に隙間を設けるものであり、
前記隙間に上流側空気放出開口から供給された空気が流れるものであることを特徴とする二段燃焼装置。
A flame hole member, and two or more air flow path members, wherein the air flow path member has a wall shape and has an air discharge opening on a tip side, and the flame hole member is disposed between the air flow path members. The first combustion part is formed by the space surrounded by the flame hole member and the air flow path member, and the oxygen-deficient fuel gas is discharged from the flame hole member to the first combustion part for combustion, and further the air flow A two-stage combustion apparatus for receiving and supplying air from an air discharge opening of a road member,
Site constituting the first combustion portion of an air passage member or than the upstream-side air discharge opening is provided on the upstream side, the air discharged from the upstream side air discharge opening flows also the side of the burner port member Is,
On at least one wall surface of the air flow path member, a ridge oriented parallel to the air flow direction is formed,
The ridge is in contact with the outer surface of the flame hole member to provide a gap between them,
The two-stage combustion apparatus, wherein air supplied from an upstream air discharge opening flows through the gap .
炎孔部材は中央側開口と側面側開口とを有し、側面側開口から放出される燃料ガスの流速は中央側開口から放出される燃料ガスの流速よりも遅いことを特徴とする請求項1又は2に記載の二段燃焼装置。 The flame hole member has a center side opening and a side opening, and a flow rate of the fuel gas discharged from the side opening is slower than a flow rate of the fuel gas discharged from the center opening. Or the two-stage combustion apparatus of 2 . 炎孔部材は本体部と本体部の側面に設けられた減圧壁によって構成され、本体部の側面と減圧壁との間に空隙が設けられて側面側開口が構成されていることを特徴とする請求項3に記載の二段燃焼装置。 The flame hole member is constituted by a main body part and a decompression wall provided on a side surface of the main body part, and a side surface opening is constructed by providing a gap between the side surface of the main body part and the decompression wall. The two-stage combustion apparatus according to claim 3. 空気流路部材の少なくとも一方の第一燃焼部を構成する壁面に、凸条又は凹溝が形成されていることを特徴とする請求項1乃至4のいずれかに記載の二段燃焼装置。 5. The two-stage combustion apparatus according to claim 1, wherein a ridge or a groove is formed on a wall surface constituting at least one first combustion portion of the air flow path member. 空気流路部材の少なくとも一方には、第一燃焼部を構成する壁面に炎孔部材側から外側方向に伸びるスリットが複数列設けられ、空気流路部材の長手方向端部近傍においては前記スリットの長さが中央部のそれに比べて長いことを特徴とする請求項1乃至5のいずれかに記載の二段燃焼装置。 At least one of the air flow path members is provided with a plurality of rows of slits extending outward from the flame hole member side on the wall surface constituting the first combustion section, and in the vicinity of the longitudinal end of the air flow path member, the slits 6. The two-stage combustion apparatus according to claim 1, wherein the length is longer than that of the central portion. 炎孔部材は燃料ガスを放出する開口を有し、空気流路部材の先端側に設けられた空気放出開口は、前記燃料ガスを放出する開口の延長線に対応する位置に設けられていることを特徴とする請求項1乃至6のいずれかに記載の二段燃焼装置。 The flame hole member has an opening for discharging fuel gas, and the air discharge opening provided on the front end side of the air flow path member is provided at a position corresponding to an extension line of the opening for discharging the fuel gas. The two-stage combustion apparatus according to any one of claims 1 to 6. 空気流路部材は表板と裏板とを有し、両者の間に空気流路となる空隙を形成するものであり、前記表板又は裏板の少なくとも一方に内面側に向かって凹変した凹変部を有し、当該凹変部の正面形状は、流線型であることを特徴とする請求項1乃至7のいずれかに記載の二段燃焼装置。 The air flow path member has a front plate and a back plate, and forms an air gap as an air flow path between the two. The at least one of the front plate or the back plate is recessed toward the inner surface side. The two-stage combustion apparatus according to any one of claims 1 to 7, wherein the two-stage combustion apparatus has a concave change part, and a front shape of the concave change part is a streamline type. 空気流路部材の先端は鋭角の稜線状であることを特徴とする請求項1乃至8のいずれかに記載の二段燃焼装置。 The two-stage combustion apparatus according to any one of claims 1 to 8, wherein a tip of the air flow path member has an acute ridge shape. 空気流路部材の表面の一部は炎孔部材の側面と略平行状態に面してその間に空気流路を形成し、空気流路部材の内面における部位はその上流側の部位と連続的な平面で連続していることを特徴とする請求項1乃至9のいずれかに記載の二段燃焼装置。 A part of the surface of the air flow path member faces substantially parallel to the side surface of the flame hole member to form an air flow path therebetween, and the portion on the inner surface of the air flow path member is continuous with the upstream portion thereof. The two-stage combustion apparatus according to any one of claims 1 to 9, wherein the two-stage combustion apparatus is continuous in a plane.
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6354510A (en) * 1986-08-22 1988-03-08 Osaka Gas Co Ltd Gas burner
JPS6361618A (en) * 1986-08-29 1988-03-17 Toyota Motor Corp Device for restricting abrupt change in steering wheel holding force
JPH0221113A (en) * 1988-07-06 1990-01-24 Matsushita Electric Ind Co Ltd High load-burner
JPH02157514A (en) * 1988-12-09 1990-06-18 Matsushita Electric Ind Co Ltd Low noise high load combustion device
JPH03207906A (en) * 1990-01-08 1991-09-11 Matsushita Electric Ind Co Ltd Burner with enhanced flame stabilizer
JP2956242B2 (en) * 1991-03-27 1999-10-04 松下電器産業株式会社 Combustion equipment
JPH07293830A (en) * 1994-04-28 1995-11-10 Osaka Gas Co Ltd Thick and thin fuel combustion device
JP4385272B2 (en) * 2001-01-09 2009-12-16 株式会社ノーリツ Combustion device
JP3891075B2 (en) * 2002-08-30 2007-03-07 株式会社ノーリツ Two-stage combustion device

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