JPH0635884B2 - Thin film flame gas combustion equipment - Google Patents
Thin film flame gas combustion equipmentInfo
- Publication number
- JPH0635884B2 JPH0635884B2 JP2096056A JP9605690A JPH0635884B2 JP H0635884 B2 JPH0635884 B2 JP H0635884B2 JP 2096056 A JP2096056 A JP 2096056A JP 9605690 A JP9605690 A JP 9605690A JP H0635884 B2 JPH0635884 B2 JP H0635884B2
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- flame
- film flame
- air
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000010409 thin film Substances 0.000 title claims description 45
- 238000002485 combustion reaction Methods 0.000 title claims description 35
- 239000007789 gas Substances 0.000 claims description 32
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 239000002737 fuel gas Substances 0.000 claims description 4
- 239000003570 air Substances 0.000 description 25
- 239000000446 fuel Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Gas Burners (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、予混合させた燃焼用混合気の噴流を薄膜状に
成層燃焼させる薄膜状火炎のガス燃焼機器に関する。Description: TECHNICAL FIELD The present invention relates to a thin-film flame gas combustion device that stratifies and combusts a jet of a premixed combustion mixture into a thin film.
［従来の技術］ 特願昭63- 38396号の薄膜状火炎を用いたガス燃焼機器
は、燃料ガスと空気との予混合気を噴出するバーナの噴
出口から、所定の距離だけ隔てて噴出流を遮蔽する平板
状の遮蔽面を配し、該噴出流の層流域にて該遮蔽面に沿
って流れる予混合気を薄膜状火炎に燃焼させる構成であ
った。[Prior Art] Japanese Patent Application No. 63-38396 discloses a gas combustion device using a thin film flame, which is ejected at a predetermined distance from a burner ejection port that ejects a premixed mixture of fuel gas and air. A flat shielding surface for shielding the air is provided, and the premixed gas flowing along the shielding surface in the laminar flow region of the jet flow is burned into a thin film flame.
この薄膜状火炎のガス燃焼機器は、以下の特徴を有して
いた。This thin-film flame gas combustion device had the following features.
（ａ）遮蔽板を被加熱体とすることにより、容易に調理
に適用でき遮蔽板を輻射熱源とすることにより、暖房、
加熱などの用途に利用できる。(A) By using the shielding plate as an object to be heated, it can be easily applied to cooking, and by using the shielding plate as a radiant heat source, heating,
It can be used for applications such as heating.
（ｂ）燃焼炎を大面積で薄くかつ偏平にできるため被加
熱体を均一に加熱できる。(B) Since the combustion flame can be made thin and flat over a large area, the object to be heated can be heated uniformly.
（ｃ）空気過剰率が大きい領域でも安定燃焼させること
ができるため、燃焼温度が低く、熱による窒素酸化物
（ＮＯｘ）の発生が少ない。(C) Since stable combustion can be performed even in a region where the excess air ratio is large, the combustion temperature is low and the generation of nitrogen oxides (NOx) due to heat is small.
（ｄ）偏平で薄い全予混合火炎を大面積で被加熱物に近
接して形成できるため、熱効率が高い。(D) Since a flat and thin premixed flame can be formed in a large area close to the object to be heated, the thermal efficiency is high.
［発明が解決しようとする課題］ しかし、上記、特願昭63- 38396号の薄膜状火炎を用い
たガス燃焼機器では、薄膜状火炎の形成と予混合気の流
速とが、微妙な釣り合い範囲で保たれている。また薄膜
状火炎の外周部は、中央部に比較して環境空気との混合
の影響が大きく、リーンになっているので、燃焼性が悪
い。また、予混合気の噴流と外気のせん断層では、常時
乱流が発生しており、前記外周部は、前記乱流の影響で
容易に脈動する。以上の理由により、前記外周部が非常
に不安定な状況におかれており、薄膜状火炎が、外周部
の乱れにより、ゆらぎ不安定であると、燃焼効率は大き
く低下する。[Problems to be Solved by the Invention] However, in the gas combustion device using the thin film flame of Japanese Patent Application No. 63-38396, the formation of the thin film flame and the flow velocity of the premixed gas are in a delicate balance range. Is kept at. In addition, the outer peripheral portion of the thin film flame has a larger influence of mixing with the ambient air than the central portion and is lean, so that the flammability is poor. Further, turbulence is constantly generated in the jet stream of the premixed air and the shear layer of the outside air, and the outer peripheral portion easily pulsates due to the influence of the turbulence. For the above reasons, if the outer peripheral portion is in a very unstable state and the thin film flame is unstable in fluctuation due to the disturbance of the outer peripheral portion, the combustion efficiency is greatly reduced.
本発明は上記課題を鑑みてなされたものであり、その目
的は、薄膜状火炎形成域において、薄膜状火炎の外周部
の噴流を安定させて、薄膜状火炎がゆらぐのを防止し、
燃焼効率を向上できる薄膜状火炎のガス燃焼機器を提供
することにある。The present invention has been made in view of the above problems, and an object thereof is to stabilize the jet of the outer peripheral portion of the thin film flame in the thin film flame formation region, and prevent the thin film flame from fluctuating,
It is an object of the present invention to provide a gas combustion device for a thin film flame that can improve combustion efficiency.
［課題を解決するための手段］ 本発明の薄膜状火炎のガス燃焼機器は、燃料ガスと空気
との予混合気を噴出するバーナの噴出口から、所定の距
離だけ隔てて噴出流を遮蔽する遮蔽面を配し、該噴出流
の層流域にて該遮蔽面に沿って流れる予混合気を薄膜状
火炎に燃焼させるガス燃焼機器において、前記遮蔽面
の、火炎外周端の上方に位置する部位に、薄膜状火炎の
外周部に沿った、環状凹部、環状凸部、凹段部、又は凸
段部等を設けた構成を採用した。[Means for Solving the Problem] The thin-film flame gas combustion apparatus of the present invention shields the jet flow at a predetermined distance from the jet port of the burner that jets a premixed gas of fuel gas and air. In a gas combustion device for arranging a shielding surface and burning a premixed gas flowing along the shielding surface into a thin film flame in the laminar flow region of the jet flow, a portion of the shielding surface located above the outer peripheral edge of the flame. In addition, a configuration in which an annular concave portion, an annular convex portion, a concave step portion, a convex step portion, or the like is provided along the outer peripheral portion of the thin film flame is adopted.
［作用および発明の効果］ 本発明の薄膜状火炎のガス燃焼機器は、上記構成によ
り、 （作用）薄膜状火炎の外周部に沿って渦が発生し、噴流
は薄膜状火炎の外周部で安定するとともに滞留時間が伸
びるので、 （効果）薄膜状火炎の外周部で燃焼ガスの分子運動が増
大して燃焼性が向上し昇温するとともに、薄膜状火炎全
体はゆらぐのが防止されて安定性を増し、良好な燃焼状
態が得られることにより、燃焼効率が向上する。[Operation and Effect of Invention] With the above-described configuration, the gas combustion device for a thin film flame of the present invention has the following structure. (Effect) The molecular motion of the combustion gas increases at the outer periphery of the thin film flame to improve combustibility and raise the temperature, and the entire thin film flame is prevented from fluctuating and is stable. And a good combustion state is obtained, so that the combustion efficiency is improved.
［実施例］ 次に本発明にかかる薄膜状火炎のガス燃焼機器を第１〜
３図に示す第１実施例に基づき説明する。[Example] Next, the thin-film flame gas combustion equipment according to the present invention
A description will be given based on the first embodiment shown in FIG.
薄膜状火炎のガス燃焼機器Ａは、ケース７内に垂直に設
置された全予混合（全一次空気）式バーナ１、該バーナ
１へ燃料ガスと燃焼所要空気との混合気を供給する混合
気供給装置２と、前記バーナ１の上方にバーナの軸心と
直交的に配された円形の遮蔽板３Ａと、前記バーナ１の
円形噴出口１２に装着された網状の多孔整流板１３を主
要構成物とする。The thin-film flame gas combustion device A is a premixed (total primary air) type burner 1 installed vertically in a case 7, and a mixture that supplies a mixture of fuel gas and required combustion air to the burner 1. The main components are a supply device 2, a circular shield plate 3A arranged above the burner 1 and orthogonal to the axis of the burner, and a mesh-shaped perforated straightening plate 13 attached to the circular ejection port 12 of the burner 1. It is a thing.
前記遮蔽板３Ａは、（本実施例では）遮蔽面３１Ａに、
薄膜状火炎の外周部５１に沿った、環状凹部３２Ａを設
けてなる金属製円板であり。また、遮蔽板３Ａは、被加
熱物が載置される受熱板であり、風防を兼ねた円筒状の
脚部８上に設置され、脚部８は、前記ケース７上に設置
されている。The shielding plate 3A has a shielding surface 31A (in this embodiment),
It is a metal disk provided with an annular recess 32A along the outer periphery 51 of the thin film flame. The shielding plate 3A is a heat receiving plate on which the object to be heated is placed, and is installed on the cylindrical leg portion 8 that also serves as a windshield, and the leg portion 8 is placed on the case 7.
前記バーナ１は、二重壁構造による内側バーナ１Ａと外
側バーナ１Ｂからなる。また、バーナ１は、同軸的に配
された内側ノズル１１Ａ（内側バーナ１Ａ用）と外側ノ
ズル１１Ｂ（外側バーナ１Ｂ用）からなる円筒二重壁の
ノズル１１を備える。該ノズル１１は、先端に向かって
絞られ、絞られる度合は先端に行くに従い減少するよう
に設定されている。内側ノズル１１Ａの先端部１２Ａ
（本実施例では口径φ２０mm）と外側ノズル１１Ｂの先
端部１２Ｂ（本実施例では口径φ４２mm）は、ともに尖
っている。内側ノズルの先端部１２Ａは、外側ノズルの
先端部１２Ｂより約５mm引っ込められている。The burner 1 includes an inner burner 1A and an outer burner 1B having a double wall structure. The burner 1 also includes a cylindrical double-walled nozzle 11 including an inner nozzle 11A (for the inner burner 1A) and an outer nozzle 11B (for the outer burner 1B) which are coaxially arranged. The nozzle 11 is squeezed toward the tip, and the degree of squeezing is set so as to decrease toward the tip. Tip portion 12A of inner nozzle 11A
Both (diameter φ20 mm in this embodiment) and tip portion 12B of outer nozzle 11B (diameter φ42 mm in this embodiment) are sharp. The tip portion 12A of the inner nozzle is retracted by about 5 mm from the tip portion 12B of the outer nozzle.
前記網状の多孔整流板１３は、（本実施例では）８０〜
１００メッシュの金属製網である。The mesh-shaped porous straightening plate 13 has a thickness of 80 to 80 (in this embodiment).
It is a 100 mesh metal net.
前記混合気供給装置２は、送風手段（図示しない）から
圧送される空気を、内側ノズル１１Ａ用通気路２１Ａと
外側ノズル１１Ｂ用通気路２１Ｂに分配し、該通気路２
１Ａと２１Ｂには、それぞれ空気量を調節する空気量調
節弁２２Ａ、２２Ｂが装着されている。また、ガス管か
ら供給されるガスを、内側ノズル１１Ａ用ガス路２３Ａ
と外側ノズル１１Ｂ用ガス路２３Ｂに分配し、該ガス路
２３Ａと２３Ｂには、それぞれガス量を調節するガス量
調節弁２４Ａ、２４Ｂが装着されている。通気路２１Ａ
とガス路２３Ａおよび通気路２１Ｂとガス路２３Ｂが、
下流で接続され、混合気供給路２５Ａ、２５Ｂとなり、
それぞれ内側バーナ１Ａと外側バーナ１Ｂに混合気を供
給する。The air-fuel mixture supply device 2 distributes the air pressure-fed by a blower (not shown) to the air passage 21A for the inner nozzle 11A and the air passage 21B for the outer nozzle 11B, and the air passage 2
1A and 21B are equipped with air amount adjusting valves 22A and 22B for adjusting the air amount, respectively. In addition, the gas supplied from the gas pipe is supplied to the gas passage 23A for the inner nozzle 11A.
And gas quantity adjusting valves 24A and 24B for adjusting the gas quantity respectively are installed in the gas paths 23A and 23B. Ventilation path 21A
And the gas passage 23A, the ventilation passage 21B, and the gas passage 23B,
It is connected downstream and becomes the air-fuel mixture supply paths 25A, 25B,
The air-fuel mixture is supplied to the inner burner 1A and the outer burner 1B, respectively.
バーナ１は、混合気供給装置２で予混合された混合気が
下方から供給され、絞られたノズル１１（内側ノズル１
１Ａと外側ノズル１１Ｂからなる）の円形噴出口１２か
ら上方に噴出される。The burner 1 is supplied with the air-fuel mixture premixed by the air-fuel mixture supply device 2 from below, and is squeezed into a nozzle 11 (inner nozzle 1
1A and the outer nozzle 11B) are ejected upward from the circular ejection port 12.
（全点火時の作用） 前記噴出口１２から噴出される噴流４は、内側ノズルの
先端部１２Ａから発生する乱流Ｅの影響を受けるが、前
記整流板１３により噴出口１２で、均一且つ微小な乱流
（図示しない）が発生し、噴出口１２において均一の噴
出速度Ｖ０の噴流４となっている。噴流４は、上昇する
に従い、流速が均一な安定した層流状態を形成し、また
上昇するに従い、漸次水平方向に拡散して、流域の断面
積を広げる。それと共に、垂直方向の噴流４の流速Ｖ
は、漸減していき、噴流４の中心線と遮蔽面３１Ａとの
交点で噴流４の流速Ｖ＝０の澱点となる。噴流４は、遮
蔽板３Ａによって偏向され、遮蔽板３Ａに沿って放射状
に広がる。噴流４と外気との境界では、粘性によるせん
断層４３が生じる。遮蔽板３１Ａに沿っては、境界層４
４が生じる。(Operation at the time of full ignition) The jet flow 4 ejected from the ejection port 12 is affected by the turbulent flow E generated from the tip portion 12A of the inner nozzle, but is uniform and minute at the ejection port 12 by the straightening plate 13. A turbulent flow (not shown) is generated, and the jet flow 4 has a uniform jet velocity V 0 at the jet outlet 12. The jet flow 4 forms a stable laminar flow state in which the flow velocity is uniform as it rises, and gradually diffuses in the horizontal direction as it rises, expanding the cross-sectional area of the basin. Along with that, the flow velocity V of the jet 4 in the vertical direction
Gradually decreases, and becomes a stagnation point of the flow velocity V = 0 of the jet 4 at the intersection of the center line of the jet 4 and the shielding surface 31A. The jet flow 4 is deflected by the shield plate 3A and spreads radially along the shield plate 3A. At the boundary between the jet 4 and the outside air, a shear layer 43 due to viscosity is generated. A boundary layer 4 is formed along the shield plate 31A.
4 results.
せん断層４３では、乱流Ｃが常に発生しており、乱流Ｃ
は噴流４の外周部に影響し、外周部の流速が小刻みに変
化する脈動を誘起するが、（本発明の要旨である）前記
環状凹部３２Ａにより一定の周期を持って小さく変化す
る渦Ｄが発生するので、薄膜状火炎形成域において、乱
流Ｃによる噴流４の攪乱を防ぐことができる。Turbulent flow C is always generated in the shear layer 43, and
Influences the outer peripheral portion of the jet flow 4 and induces pulsation in which the flow velocity in the outer peripheral portion changes in small steps, but the vortex D that changes small with a constant period due to the annular recess 32A (which is the gist of the present invention). Since it is generated, the disturbance of the jet flow 4 due to the turbulent flow C can be prevented in the thin film flame formation region.
この状態で噴流４に点火すると、予混合気の火炎伝播速
度Ｓと、噴流４の流速Ｖとが釣り合った面において薄膜
の燃焼火炎（以後薄膜状火炎）５が形成される。この燃
焼火炎５は、噴出速度Ｖ０が大きくなるか、または予混
合気の空燃比がリーン（燃焼空気の過多）になるなどで
火炎伝播速度Ｓが低下すると遮蔽板３側に変位し、その
逆のときは噴出口１２側に変位する。すなわちＶ０（噴
出速度）＞Ｓ（火炎伝播速度）である限り、噴出口１２
と遮蔽面３１Ａとの間には、Ｖ（噴流４の流速）＝Ｓ
（火炎伝播速度）となる面は必ず存在するので、噴出速
度Ｖ０が増大しても吹消えによる失火は生じ難い。When the jet 4 is ignited in this state, a thin-film combustion flame (hereinafter referred to as a thin-film flame) 5 is formed on the surface where the flame propagation speed S of the premixed air and the flow velocity V of the jet 4 are balanced. The combustion flame 5 is displaced to the shield plate 3 side when the flame propagation speed S decreases due to a high ejection speed V 0 or a lean air-fuel ratio of the premixed air (excessive combustion air). In the opposite case, it is displaced toward the ejection port 12 side. That is, as long as V 0 (jet velocity)> S (flame propagation velocity), the jet port 12
And the shielding surface 31A, V (flow velocity of the jet flow 4) = S
Since there always exists a surface which becomes (flame propagation speed), misfire due to blowout is unlikely to occur even if the ejection speed V 0 increases.
このように、この燃焼機器Ａでは、燃焼量の変化や、空
気過剰率の変動、あるいは空気中の酸素濃度の変化に対
し、薄膜状火炎５の形成位置が幾分変化するだけで、燃
焼自体は極めて安定している。As described above, in the combustion device A, the combustion itself does not change with a slight change in the formation position of the thin film flame 5 in response to a change in the combustion amount, a change in the excess air ratio, or a change in the oxygen concentration in the air. Is extremely stable.
（実施例の作用） 本発明の要旨である前記環状凹部３２Ａにより発生した
渦Ｄにより、噴流は薄膜状火炎の外周部５１で安定する
とともに滞留時間が伸びるので、外周部５１で燃焼ガス
の分子運動が増大して燃焼性が向上し昇温するととも
に、薄膜状火炎５全体はゆらぐのが防止されて安定性を
増す。また、風などによる外気圧の異変が発生すると、
せん断層４３の乱流Ｃが大きく変動して、内側の噴流４
に影響するが、環状凹部３２Ａにより発生した渦Ｄによ
り影響が小さくなる。(Operation of Embodiment) Due to the vortex D generated by the annular recess 32A, which is the gist of the present invention, the jet flow is stabilized in the outer peripheral portion 51 of the thin film flame and the residence time is extended, so that the molecules of the combustion gas in the outer peripheral portion 51. As the motion increases, the combustibility improves, and the temperature rises, and the entire thin film flame 5 is prevented from fluctuating and the stability increases. Also, when the atmospheric pressure changes due to wind, etc.,
The turbulent flow C in the shear layer 43 fluctuates greatly and the inner jet 4
However, the influence is reduced by the vortex D generated by the annular recess 32A.
（実施例の効果） 薄膜状火炎の安定と、薄膜状火炎外周部の昇温により、
燃焼効率が顕著に向上する。(Effects of Example) By stabilizing the thin film flame and increasing the temperature of the outer periphery of the thin film flame,
Combustion efficiency is significantly improved.
つぎに第２実施例を第４図に基づき説明する。Next, a second embodiment will be described with reference to FIG.
第２実施例の薄膜状火炎のガス燃焼機器（全体図は図示
せず）は、乱遮蔽板３Ｂを備え、その他は、第１実施例
と同様である。The thin-film flame gas combustion apparatus (not shown in the overall view) of the second embodiment is provided with a turbulence shield plate 3B, and is otherwise the same as that of the first embodiment.
遮蔽板３Ｂは、（第２実施例では）遮蔽面３１Ｂに、薄
膜状火炎の外周部に沿った、環状凸部３２Ｂを設けてな
る金属製円板である。The shield plate 3B is a metal disc having a shield surface 31B (in the second embodiment) provided with an annular convex portion 32B along the outer peripheral portion of the thin film flame.
つぎに第３実施例を第５に基づき説明する。Next, a third embodiment will be described based on the fifth embodiment.
第３実施例の薄膜状火炎のガス燃焼機器（全体図は図示
せず）は、遮蔽板３Ｃを備え、その他は、第１実施例と
同様である。The thin-film flame gas combustion device (not shown in the overall view) of the third embodiment is provided with a shielding plate 3C, and is otherwise the same as that of the first embodiment.
遮蔽板３Ｃは（第３実施例では）遮蔽面３１Ｃに、薄膜
状火炎の外周部に沿った、円形凹段部３２Ｃを設けてな
る金属製円板である。The shield plate 3C is a metal disc in which the shield surface 31C (in the third embodiment) is provided with a circular recess 32C along the outer periphery of the thin film flame.
つぎに第４実施例を第６図に基づき説明する。Next, a fourth embodiment will be described with reference to FIG.
第４実施例の薄膜状火炎のガス燃焼機器（全体図は図示
せず）は、遮蔽板３Ｄを備え、その他は、第１実施例と
同様である。The thin-film flame gas combustion device (not shown in the overall view) of the fourth embodiment is provided with a shield plate 3D, and the rest is the same as that of the first embodiment.
遮蔽板３Ｄは、（第４実施例では）遮蔽面３１Ｄに、薄
膜状火炎の外周部に沿った、円形凸段部３２Ｄを設けて
なる金属製円板である。The shielding plate 3D is a metal disc having a circular convex step portion 32D provided on the shielding surface 31D (in the fourth embodiment) along the outer peripheral portion of the thin film flame.
第２〜４実施例の作用および効果は、第１実施例と同様
である。The operation and effect of the second to fourth embodiments are similar to those of the first embodiment.
本発明は上記実施例以外に次ぎの変形例を含む。The present invention includes the following modifications other than the above-mentioned embodiment.
ア）多重壁構造の筒状ノズルは、二重構造以外の三重構
造以上であっても良い。A) The tubular nozzle having a multi-wall structure may have a triple structure or more than a double structure.
イ）遮蔽板は、セラミック板でも良い。B) The shielding plate may be a ceramic plate.
ウ）遮蔽板は、噴流の軸心に対し幾分傾斜して配置され
ても良く、また曲率半径の大きな曲面もしくは鈍角円錐
面であっても良い。C) The shielding plate may be arranged with a slight inclination with respect to the axis of the jet flow, and may be a curved surface with a large radius of curvature or an obtuse conical surface.
エ）噴出口は円形の他、正方形などの正多角形であって
も良い。D) The ejection port may have a regular polygonal shape such as a square as well as a circular shape.
オ）噴出口から噴出する混合気は、空気過剰率が１以上
の全予混合気以外に、一次空気が理論空燃比より幾分少
ない予混合気であっても良い。E) The air-fuel mixture ejected from the ejection port may be a pre-air mixture having an air excess ratio of 1 or more, or may be a pre-air mixture having primary air somewhat smaller than the stoichiometric air-fuel ratio.
第１図は本発明にかかる薄膜状火炎ガス燃焼機器の第１
実施例の断面図、第２図はその要部拡大図、第３図はそ
の遮蔽板の斜視図、第４図は第２実施例の遮蔽板の斜視
図、第５図は第３実施例の遮蔽板の斜視図、第６図は第
４実施例の遮蔽板の斜視図である。 図中 Ａ……薄膜状火炎のガス燃焼機器、Ｃ……乱流、
Ｄ……渦、１……全予混合式バーナ、１Ａ……内側バー
ナ、１Ｂ……外側バーナ、２……混合気供給装置、３
Ａ、３Ｂ、３Ｃ、３Ｄ……遮蔽板、４……噴流、５……
薄膜状の燃焼火炎（薄膜状火炎）、７……ケース、８…
…脚部、１１……ノズル、１１Ａ……内側ノズル、１１
Ｂ……外側ノズル、１２……円形噴出口、１２Ａ……内
側ノズルの先端部、１２Ｂ……外側ノズルの先端部、２
２Ａ、２２Ｂ……空気量調整弁、２４Ａ、２４Ｂ……ガ
ス量調節弁、３２Ａ……環状凹部、３２Ｂ……環状凸
部、３２Ｃ……円形凹段部、３２Ｄ……円形凸段部、５
１……薄膜状火炎の外周部FIG. 1 is a first diagram of a thin film flame gas combustion apparatus according to the present invention.
Sectional view of the embodiment, FIG. 2 is an enlarged view of a main part thereof, FIG. 3 is a perspective view of the shield plate, FIG. 4 is a perspective view of the shield plate of the second embodiment, and FIG. 5 is a third embodiment. FIG. 6 is a perspective view of the shield plate of FIG. 6, and FIG. 6 is a perspective view of the shield plate of the fourth embodiment. In the figure, A ... Gas combustion equipment for thin film flame, C ... Turbulence,
D ... Vortex, 1 ... Full premix burner, 1A ... Inner burner, 1B ... Outer burner, 2 ... Mixture supply device, 3
A, 3B, 3C, 3D ... Shielding plate, 4 ... Jet flow, 5 ...
Thin film combustion flame (thin film flame), 7 ... Case, 8 ...
… Legs, 11 …… Nozzle, 11A …… Inner nozzle, 11
B ... Outer nozzle, 12 ... Circular ejection port, 12A ... Inner nozzle tip, 12B ... Outer nozzle tip, 2
2A, 22B ... Air amount adjusting valve, 24A, 24B ... Gas amount adjusting valve, 32A ... Annular concave portion, 32B ... Annular convex portion, 32C ... Circular concave step portion, 32D ... Circular convex step portion, 5
1 ... Outer periphery of thin film flame
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石川 善弘 愛知県名古屋市中川区福住町２番26号 リ ンナイ株式会社内 (72)発明者 木村 淳一 愛知県東海市新宝町507―２ 東邦瓦斯株 式会社総合技術研究所内 (72)発明者 押田 俊一 愛知県東海市新宝町507―２ 東邦瓦斯株 式会社総合技術研究所内 (72)発明者 猪飼 千保美 愛知県東海市新宝町507―２ 東邦瓦斯株 式会社総合技術研究所内 (56)参考文献 特開 平１−310214（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Ishikawa 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya, Aichi Prefecture, Rinnai Co., Ltd. (72) Inventor Shunichi Oshida 502-1 Shinhocho, Tokai City, Aichi Prefecture Toho Gas Co., Ltd. Gas Technology Co., Ltd., Technical Research Institute (56) Reference JP-A-1-310214 (JP, A)
Claims (1)
ーナの噴出口から、所定の距離だけ隔てて噴出流を遮蔽
する遮蔽面を配し、該噴出流の層流域にて該遮蔽面に沿
って流れる予混合気を薄膜状火炎に燃焼させるガス燃焼
機器において、 前記遮蔽面の、火炎外周端の上方に位置する部位に、 薄膜状火炎の外周部に沿った、環状凹部、環状凸部、凹
段部、又は凸段部等を設けたことを特徴とする薄膜状火
炎のガス燃焼機器。Claim: What is claimed is: 1. A shield is provided at a predetermined distance from an outlet of a burner for ejecting a premixed mixture of fuel gas and air, and a shielding surface is provided to shield the jet in a laminar region of the jet. In a gas combustion device that burns a premixed gas flowing along a surface into a thin film flame, in the portion of the shielding surface located above the outer peripheral edge of the flame, along the outer peripheral portion of the thin film flame, an annular recess, an annular shape A gas combustion device for a thin film flame, which is provided with a convex portion, a concave step portion, a convex step portion, or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2096056A JPH0635884B2 (en) | 1990-04-10 | 1990-04-10 | Thin film flame gas combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2096056A JPH0635884B2 (en) | 1990-04-10 | 1990-04-10 | Thin film flame gas combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03294710A JPH03294710A (en) | 1991-12-25 |
| JPH0635884B2 true JPH0635884B2 (en) | 1994-05-11 |
Family
ID=14154789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2096056A Expired - Fee Related JPH0635884B2 (en) | 1990-04-10 | 1990-04-10 | Thin film flame gas combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635884B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762523B2 (en) * | 1988-02-19 | 1995-07-05 | 東邦瓦斯株式会社 | Thin film flame combustion method |
-
1990
- 1990-04-10 JP JP2096056A patent/JPH0635884B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03294710A (en) | 1991-12-25 |
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