JPH0637965B2 - Combustion device - Google Patents
Combustion deviceInfo
- Publication number
- JPH0637965B2 JPH0637965B2 JP62328568A JP32856887A JPH0637965B2 JP H0637965 B2 JPH0637965 B2 JP H0637965B2 JP 62328568 A JP62328568 A JP 62328568A JP 32856887 A JP32856887 A JP 32856887A JP H0637965 B2 JPH0637965 B2 JP H0637965B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- throttle
- flame cylinder
- air
- cylinder
- 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 - Lifetime
Links
Landscapes
- Wick-Type Burners And Burners With Porous Materials (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は家庭用の暖房等に用いられている燃焼装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for household heating or the like.
従来の技術 従来、この主の燃焼装置としては石油ストーブ等に用い
られている吸上げ気化方式の燃焼装置があるが、これは
第３図に示す様に、多数の空気孔５０を有する内炎筒５
１と外炎筒５２間に形成される燃焼室５３に燃料供給部
である灯芯５４先端を露出させて燃料を気化、燃焼させ
るようになっている。そして通常外炎筒５２は外筒５５
の絞り部５５ａより上方では開口面積の大きな透孔５２
ａを有した赤熱部５６を形成しており、灯芯５４から気
化した燃料と透孔５２ａから燃焼室５３内に導入した空
気を混合して燃焼させ、赤熱部５６を赤熱させ、輻射熱
を得ていた。2. Description of the Related Art Conventionally, as the main combustion apparatus, there is a suction vaporization type combustion apparatus used in oil stoves and the like, but as shown in FIG. 3, this is an internal flame having many air holes 50. Tube 5
1 is exposed to the combustion chamber 53 formed between the outer flame cylinder 52 and the outer flame cylinder 52 so that the fuel is vaporized and burned by exposing the tip of the wick 54 which is a fuel supply portion. The normal outer flame cylinder 52 is the outer cylinder 55.
Above the narrowed portion 55a of the through hole 52 having a large opening area.
The red heat portion 56 having a is formed, and the fuel vaporized from the wick 54 and the air introduced into the combustion chamber 53 through the through hole 52a are mixed and burned to red heat the red heat portion 56 to obtain radiant heat. It was
発明が解決しようとする問題点 しかしながら、上記の様な従来の構成では次の様な問題
を生じていた。Problems to be Solved by the Invention However, the conventional configuration as described above has the following problems.
すなわち、通常の強燃焼では第３図に示す様に内炎筒５
１と外炎筒５２間に二次炎ｆ１を形成し、燃焼室５３内
を上昇してきた未燃ガス成分を完全に燃焼させるので良
好な特性を示す。次に灯芯５４の露出高さを低くして燃
焼量を小さくした場合は火炎は燃焼室５３内に下がって
ｆ２の様に形成される。この際の燃焼装置内の空気及び
未燃ガスの流れは次のようになっている。すなわち第３
図で実線矢印は空気の流れ、破線矢印は未燃ガスの流れ
を示し、不完全燃焼状態の未燃ガスは燃焼室５３から外
炎筒５２外方の空気通路５７へ洩出する流れ５８と、燃
焼室５３から内炎筒５１内方へ洩入する流れ５９を生じ
る。そして、弱燃焼時には火炎がｆ２の様に燃焼室５３
内に落ち込んで、それより上方で火炎が形成されていな
いために、燃焼室５３より洩出、洩入した未燃ガス５
８，５９が火炎ｆ２で燃焼しきらず、高濃度のＣＯを含
んだ未燃ガスのまま、外炎筒５２上方の赤熱部５６の透
孔５２ａや、内炎筒５１の上部の空気孔５０ａや通気部
６０から直接大気中に放出されることになる。そのため
弱燃焼次には急激に排ガス特性（ＣＯ／ＣＯ２）が悪化
してしまい、それがために燃焼量調節巾を広くすること
ができなかった。That is, in normal strong combustion, as shown in FIG.
1 forms a secondary flame f 1 between the outer flame cylinder 52 and the outer flame cylinder 52, and completely burns the unburned gas component that has risen in the combustion chamber 53, thereby exhibiting good characteristics. Next, when the exposed height of the wick 54 is reduced to reduce the amount of combustion, the flame falls into the combustion chamber 53 and forms like f 2 . The flow of air and unburned gas in the combustion device at this time is as follows. That is, the third
In the figure, the solid line arrow indicates the flow of air, the broken line arrow indicates the flow of unburned gas, and the unburned gas in an incomplete combustion state leaks from the combustion chamber 53 to the air passage 57 outside the outer flame cylinder 52. A flow 59 that leaks from the combustion chamber 53 into the inner flame cylinder 51 is generated. Then, at the time of weak combustion, the flame is in the combustion chamber 53 like f 2 .
The unburned gas 5 which has leaked from the combustion chamber 53 and has leaked into the combustion chamber 53 due to the fact that no flame is formed above it.
8 and 59 are not completely burned by the flame f 2 and remain as unburned gas containing high concentration of CO, the through holes 52a of the red heat section 56 above the outer flame cylinder 52 and the air holes 50a above the inner flame cylinder 51. It will be directly discharged into the atmosphere from the ventilation part 60. Therefore, the exhaust gas characteristic (CO / CO 2 ) deteriorates rapidly after the weak combustion, which makes it impossible to widen the combustion amount adjustment range.
本発明はこのような点に鑑みてなしたもので、弱燃焼時
に高濃度のＣＯが直接大気中に放出されることを防い
で、排ガス特性の急激な悪化を抑止し、燃焼特性が良好
で、燃焼量調節巾の大きな燃焼装置を得るとともに、強
燃焼から弱燃焼まで見た目にも良好な燃焼装置を得るこ
とを目的とする。The present invention has been made in view of the above circumstances, and prevents high concentration of CO from being released directly into the atmosphere at the time of weak combustion, suppresses sharp deterioration of exhaust gas characteristics, and improves combustion characteristics. The purpose of the present invention is to obtain a combustion device having a wide range of adjustment of the combustion amount, and also to obtain a combustion device that looks good from strong combustion to weak combustion.
問題点を解決するための手段 上記問題点を解決するために本発明の燃焼装置では、内
炎筒内方に灯芯に対向する位置近傍から、内炎筒の上端
近傍まで伸び、前記内炎筒との間に形成される制流域を
底面で略遮蔽する制流筒を設けると共に、外炎筒の下方
の対向する位置に設けた外筒の絞り部と、前記絞り部の
上方に位置し、前記外炎筒との間に一定の間隙を有する
第二絞り部を設け、前記第二絞り部の上方と対向する外
炎筒の空気孔は大孔とし、前記第二絞り部の下方の対向
する外炎筒の空気孔は小孔とする二つに分け、さらに前
記絞り部の上方と対向する前記外炎筒の空気孔は小孔と
し、前記絞り部の下方と対向する前記外炎筒の空気孔は
さらに小孔とする二つに分け、それと共に、前記絞り
部、第二絞り部と対向する前記外炎筒にはそれぞれ無孔
部下、無孔部上を設けると共に、絞り部上方に設けた第
二絞り部の径は、絞り部の径よりも大きくした構成とし
てある。Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention, the inner flame cylinder extends inward from a position near the wick to a vicinity of an upper end of the inner flame cylinder. And a restricting cylinder that substantially shields the restricting region formed between the bottom surface and the restricting portion of the outer cylinder provided at a position facing below the outer flame cylinder, and is located above the restricting portion, A second throttle portion having a constant gap is provided between the outer flame cylinder and an air hole of the outer flame cylinder facing the upper side of the second throttle portion is a large hole, and the air hole of the outer flame cylinder is opposed below the second throttle portion. The air hole of the outer flame cylinder is divided into two small holes, and the air hole of the outer flame cylinder facing the upper side of the throttle portion is a small hole, and the outer flame cylinder facing the lower side of the throttle portion. The air holes of the above are divided into two smaller holes, and at the same time, in the outer flame cylinder facing the throttle portion and the second throttle portion, The bottom of the non-hole portion and the top of the non-hole portion are respectively provided, and the diameter of the second throttle portion provided above the throttle portion is made larger than the diameter of the throttle portion.
作用 本発明は上記した構成により、内炎筒内方に洩入した未
燃ガスを制流筒上方から供給される清浄な空気により、
火炎より上方へ流れるのを防止し、燃焼量に応じた位置
で良好な混合状態を生成せしめて燃焼を促進させ、火炎
より上方に未燃ガスが流れることを防いでいる。また外
炎筒外方に洩出した未燃ガスについても、第二絞り部に
より、絞り部より下方と対向する空気孔より大きな開孔
の空気孔を通して、燃焼室内方へ導びき火炎より上方へ
未燃ガスが流れることを防止する。すなわち内炎筒内方
へ洩入したり、外炎筒外方へ洩出したＣＯを含んだ未燃
ガスはほとんどが燃焼室に再流入して燃焼してしまうこ
とになり広範囲の燃焼量調節に対して排ガス特性を良好
に保つことができる。また、第二絞り部と絞り部間と対
向する外炎筒の開孔を、第二絞り部より上方と対向する
外炎筒の空気孔の開孔より小さくしているので、強燃焼
時に、第二絞り部より多量の空気が流入し、燃焼室内に
黄火が立ち不安定な燃焼になることも防ぐことができ
る。また、絞り部及び第二絞り部と対向する外炎筒には
無孔部を設けているので、絞り部及び第二絞り部より空
気が多量に流入し、燃焼室内に黄火が立ち不安定な燃焼
になることを防ぐと共に、逆に空気孔があった場合に生
じる保炎が不安定になったために起こりやすい燃焼音や
火炎の揺らぎもなくなり、安定した燃焼状態とすること
ができる。Action The present invention has the above-mentioned configuration, and the unburned gas leaking into the inner flame cylinder is cleaned by the clean air supplied from above the flow restricting cylinder.
The flow above the flame is prevented, a good mixed state is generated at a position corresponding to the amount of combustion, and combustion is promoted, and unburned gas is prevented from flowing above the flame. Also for unburned gas that has leaked to the outside of the outer flame tube, the second throttle portion guides the air to the inside of the combustion chamber through the open air holes that are larger than the air holes facing the lower side of the throttle portion and goes above the flame. Prevent unburned gas from flowing. That is, most of the unburned gas containing CO that leaks into the inner flame cylinder or leaks out of the outer flame cylinder re-enters the combustion chamber and is burned, so that a wide range of combustion amount adjustment is performed. On the other hand, the exhaust gas characteristics can be kept good. Further, since the opening of the outer flame cylinder facing between the second throttle portion and the throttle portion is smaller than the opening of the air hole of the outer flame cylinder facing above the second throttle portion, during strong combustion, It is also possible to prevent a large amount of air from flowing in from the second throttle portion, causing a yellow fire in the combustion chamber and unstable combustion. In addition, since the outer flame cylinder facing the throttle and the second throttle has a non-perforated portion, a large amount of air flows in from the throttle and the second throttle, causing a yellow fire in the combustion chamber and making it unstable. It is possible to prevent a stable combustion state and prevent the combustion noise and the fluctuation of the flame which are likely to occur due to the unstable flame holding caused by the presence of the air holes.
実施例 以下本発明の一実施例を添付図面に基づいて説明する。
第１図は強燃焼状態、第２図は弱燃焼状態を示す。図に
おいて１は燃焼供給部である灯芯で、芯内筒２と芯外筒
３の間に上下動自在に設定されている。芯内筒２と芯外
筒３の上端部はそれぞれ内火皿４、外火皿５を形成して
おり、内炎筒６、外炎筒７が載置されている。灯芯１の
先端は燃焼時には内炎筒６と外炎筒７間に形成される燃
焼室８内に露出され、ここで燃焼の気化が行われる。９
は外筒で、内炎筒６、外炎筒７、外筒９は内方より順次
略同心状に配置され固定ピン１０によって一体化されて
いる。１１は内炎筒６および外炎筒７に多数設けられた
空気孔である。１２は内炎筒６の上端開口部を閉塞する
内炎筒天板で、内炎筒６内方から上方へ通じる開孔部１
３を有している。１４は内炎筒天板１２上に載置された
拡炎板である。Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a strong combustion state, and FIG. 2 shows a weak combustion state. In the figure, reference numeral 1 denotes a wick, which is a combustion supply unit, and is vertically movable between an inner core tube 2 and an outer core tube 3. The upper ends of the inner core tube 2 and the outer core tube 3 respectively form an inner fire tray 4 and an outer fire tray 5, on which an inner flame barrel 6 and an outer flame barrel 7 are placed. At the time of combustion, the tip of the wick 1 is exposed inside a combustion chamber 8 formed between the inner flame cylinder 6 and the outer flame cylinder 7, where the combustion is vaporized. 9
Is an outer cylinder, and the inner flame cylinder 6, the outer flame cylinder 7, and the outer cylinder 9 are sequentially arranged substantially concentrically from the inside and are integrated by a fixing pin 10. Reference numeral 11 denotes air holes provided in the inner flame cylinder 6 and the outer flame cylinder 7. Reference numeral 12 denotes an inner-flame cylinder top plate that closes an upper end opening of the inner-flame cylinder 6, and an opening portion 1 that communicates upward from the inside of the inner-flame cylinder 6
Have three. Reference numeral 14 is a flame spreading plate placed on the inner flame tube top plate 12.
外炎筒７は小孔の空気孔１１を有する気孔部１５と、そ
の上方に開孔の大きな透孔１６を有する赤熱部１７が形
成されており、気孔部１５と赤熱部１７の間には、気孔
部１５より開孔率が大きく、赤熱部１７より開孔率の小
さな中間部１８が形成されている。そして気孔部１５と
中間部１８の間には無孔部下４０が設けられ、中間部１
８と赤熱部１７の間に無孔部上４１が設けられている。
また、気孔部１５と赤熱部１７の間、つまり無孔部下４
０と対向する外方には一定の間隙S1を有する外筒９の絞
り部１９が設けられている。また、中間部１８と赤熱部
１７の間の外方、つまり無孔部上４１と対向する外方に
は、Ｓ1よりも広い一定の間隙S2を介して第二絞り部２
０が配されてあり、絞り部１９との間に循環域２１を形
成している。２２はガラス等の透過性材料よりなる透過
筒で、外筒９の第二絞り部２０上に載置されている。２
３はトップフレームで赤熱部１７と透過筒２２の間の空
気通路２４の上端を遮蔽するように赤熱部１７の上端に
載置され、透過筒２２を固定している。２５は内炎筒６
内方に設置された制流筒で、灯芯１先端に対向する位置
近傍から内炎筒６先端付近まで上方へのび、かつ内炎筒
６間に形成される制流域２６をその底面で略遮蔽するよ
うに設けられている。２７は空気導入路である。The outer flame cylinder 7 is formed with a pore portion 15 having a small air hole 11 and a red heating portion 17 having a large open hole 16 above the pore portion 15, and between the pore portion 15 and the red heating portion 17. An intermediate portion 18 having a larger opening ratio than the pore portion 15 and a smaller opening ratio than the red-hot portion 17 is formed. An unperforated lower portion 40 is provided between the pore portion 15 and the intermediate portion 18, and the intermediate portion 1
A non-perforated part upper part 41 is provided between 8 and the red heat part 17.
In addition, between the pore portion 15 and the red-hot portion 17, that is, below the non-hole portion 4
A throttle portion 19 of the outer cylinder 9 having a constant gap S 1 is provided on the outside facing 0. Further, outwardly between the intermediate portion 18 and the red-hot portion 17, that is, outwardly facing the non-hole portion 41, there is a constant gap S 2 wider than S 1 and the second throttle portion 2
0 is arranged, and a circulation region 21 is formed between it and the throttle unit 19. Reference numeral 22 denotes a transparent cylinder made of a transparent material such as glass, and is placed on the second throttle portion 20 of the outer cylinder 9. Two
A top frame 3 is mounted on the upper end of the red heat section 17 so as to shield the upper end of the air passage 24 between the red heat section 17 and the transmission tube 22, and fixes the transmission tube 22. 25 is the inner flame cylinder 6
With the flow restricting cylinder installed inward, it extends upward from the vicinity of the position facing the tip of the wick 1 to the vicinity of the tip of the inner flame cylinder 6, and substantially shields the restriction flow region 26 formed between the inner flame cylinders 6 at its bottom surface. It is provided to do. 27 is an air introduction path.
２８は制流筒２５に複数ケ所設けられた通気孔で、２９
は通気孔２８直上で制流域２６を２６ａ，２６ｂ，２６
ｃに分割する遮蔽部であり、ビーディング加工やフレア
加工等を応用して制流筒２５を外周方向に突出させるこ
とによって形成している。３０は制流筒２５と内炎筒天
板１２との間に一定の間隔を有するように設定された通
気部である。28 is a ventilation hole provided in a plurality of places in the flow control cylinder 25,
Is located just above the ventilation hole 28 in the restriction region 26a, 26b, 26
It is a shielding portion divided into c and is formed by projecting the flow control cylinder 25 in the outer peripheral direction by applying beading processing, flare processing, or the like. Reference numeral 30 is a ventilation portion set so as to have a constant distance between the flow restricting cylinder 25 and the inner flame cylinder top plate 12.
上記構成において灯芯１に点火すると燃焼開始し、燃焼
によるい高温の燃焼ガスが燃焼室８を上昇することによ
り熱ドラフトを生じ、燃焼に必要な空気が内炎筒６、外
炎筒７の空気孔１１および赤熱部１７の透孔１６より燃
焼室８内に供給され燃焼が継続される。このとき内炎筒
６内方から供給される空気は、制流筒２５下方から灯芯
１近傍に供給される空気と、空気導入路２７を上昇する
空気に分けられる。上昇した空気の一部は、通気孔２８
を通過し、燃焼室８へ供給される。さらに内炎筒６上方
に供給された空気は、空気孔１１や開口部１３から燃焼
室８およびその上方へ供給される。また一部は、制流域
２６ｃに降下し、比較的下方の空気孔１１からも燃焼室
８に供給される。一方気化された燃料は、空気との混合
ガスとなって主として燃焼室８を上昇する。しかし制流
域26a,26b,26cは負圧になるため未燃ガスの一部は制流
域26a,26b,26c内に洩入する。したがって制流域26a,26
b,26cには未燃ガスが充満する。この未燃ガスは通気孔
２８、通気部３０で空気流と混合され、再び燃焼室８へ
供給される。したがって強燃焼時には内炎筒６の上端付
近から未燃ガスと空気を良く混合した状態で燃焼室８上
端付近に供給するので領域Ａ付近で効率よく燃焼させ、
さらにここで燃焼しきれなかった未燃ガスは上方に形成
される火炎ＦＨで燃焼される。In the above structure, when the wick 1 is ignited, combustion starts, and a high temperature combustion gas due to combustion rises in the combustion chamber 8 to generate a thermal draft, and the air required for combustion is the air in the inner flame cylinder 6 and the outer flame cylinder 7. The combustion is continued by being supplied into the combustion chamber 8 through the holes 11 and the through holes 16 of the red heat section 17. At this time, the air supplied from the inside of the inner flame cylinder 6 is divided into air supplied from below the flow restricting cylinder 25 to the vicinity of the wick 1 and air rising in the air introduction passage 27. Part of the air that has risen is vented by the vent holes 28.
And is supplied to the combustion chamber 8. Further, the air supplied above the inner flame cylinder 6 is supplied from the air hole 11 and the opening 13 to the combustion chamber 8 and the upper part thereof. Further, a part of the air flows into the flow control area 26c and is supplied to the combustion chamber 8 also from the air holes 11 located relatively below. On the other hand, the vaporized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8. However, since the pressures in the restricted regions 26a, 26b, 26c become negative pressure, a part of the unburned gas leaks into the restricted regions 26a, 26b, 26c. Therefore, the basin 26a, 26
Unburned gas fills b and 26c. The unburned gas is mixed with the air flow in the ventilation hole 28 and the ventilation portion 30 and is again supplied to the combustion chamber 8. Therefore, at the time of strong combustion, unburned gas and air are mixed well from near the upper end of the inner flame cylinder 6 and are supplied to near the upper end of the combustion chamber 8, so that they are efficiently burned near the area A.
Further, the unburned gas that has not been completely burned here is burned by the flame F H formed above.
また、外筒９下方にある空間部３１より供給される空気
は、絞り部１９の下方にある気孔部１５の空気孔１１よ
り燃焼室８内に供給される空気３２と、絞り部１９を通
過し上昇する空気３３に分けられる。絞り部１９により
循環域２１は、内炎筒６内方の制流域２６と同様に負圧
となるために未燃ガスの一部は循環域２１内や空気通路
２４に洩出する流れ３４を生じる。循環域２１に洩出し
た未燃ガスは第二絞り部２０により外炎筒７の透孔１６
を通し燃焼室８内へ導かれる流れ３５と第二絞り部２０
を通過し空気通路２４に入り、中間部１８を通過し再び
燃焼室８内へ洩入する流れ３６を生じる。したがって強
燃焼時には外炎筒７の赤熱部１７の外方にて燃焼が行な
われ、赤熱部１７の輝度を向上させるとともに、ここで
燃焼しきれなかった未燃ガスは上方に形成された火炎FH
で燃焼される。したがって、強燃焼においては排ガス特
性は良好である。この際に、循環域２１と対向する中間
部１８の開孔率を赤熱部１７の開孔率より小さくし、か
つ間隙Ｓ２をＳ１より広くしているので、中間部１８よ
り多量の空気が燃焼室８内へ混入し、燃焼室８内の火炎
が内炎筒６寄りになり、燃焼室８内に黄火が立ち不安定
な燃焼となることを防ぐことができ、強燃焼時安定した
燃焼を形成できる。また、絞り部１９及び第二絞り部２
０と対向する外炎筒７に無孔部下４０及び無孔部上４１
を設けているので、絞り部１９及び第二絞り部２０によ
り多量の空気が燃焼室８内へ送り込まれ易くすることを
防ぎ、燃焼室８内への黄火混入を防いでいる。絞り部１
９や第二絞り部２０と対向する部分はかなりの量の空気
が流れ易くなっているために、外炎筒７に空気孔を設け
ていた場合、その空気孔の大きさが余り大きくなくて
も、燃焼室内に黄火が混入してしまう。実験によれば直
径１．２mm以下程度ではそう問題とはならないが、それ
以上ではかなり燃焼室８内へ黄火が混入してしまい、不
安定な燃焼となってしまう。ただし、絞り部１９、第二
絞り部２１と対向する部分は非常に不安定な部分であ
る。絞り部１９と対向する部分は空気が燃焼室８内へ流
入する部分でもあり、未燃ガスが循環域２１へ洩出する
部分でもある。そのためその部分に空気孔を設けている
と保炎がついたり、消えたりしてしまうことがある。そ
のため燃焼中に音が発生したり、火炎FHが振動したりす
ることがある。これを防ぐためにも無孔部下４０を設け
ていた方が好ましい。同様に第二絞り部２０と対向する
外炎筒７についても、この部分は循環域２１より燃焼室
８内へ流入する部分でもあり、空気通路２４に流出する
部分でもある。そのため燃焼が不安定になることを防ぐ
ためにも無孔部上４１を設けることが望ましい。Further, the air supplied from the space 31 below the outer cylinder 9 passes through the throttle 32 and the air 32 supplied into the combustion chamber 8 from the air holes 11 of the pores 15 below the throttle 19. It is divided into rising air 33. The throttle portion 19 causes the circulation region 21 to have a negative pressure similarly to the control flow region 26 inside the inner flame tube 6, so that a part of the unburned gas flows through the flow 34 that leaks into the circulation region 21 or the air passage 24. Occurs. The unburned gas leaking to the circulation area 21 is passed through the second throttle portion 20 to the through hole 16 of the outer flame cylinder 7.
Flow 35 which is introduced into the combustion chamber 8 through the second throttle portion 20
Flow into the air passage 24, pass through the intermediate portion 18 and again leak into the combustion chamber 8 to form a flow 36. Therefore, at the time of strong combustion, combustion is performed outside the red-heated portion 17 of the outer flame tube 7 to improve the brightness of the red-heated portion 17, and the unburned gas that could not be completely burned here is the flame F formed above. H
Burned in. Therefore, exhaust gas characteristics are good in strong combustion. At this time, the open area ratio of the intermediate portion 18 facing the circulation area 21 is made smaller than the open area ratio of the incandescent portion 17, and the gap S 2 is made wider than S 1. Is mixed into the combustion chamber 8, the flame in the combustion chamber 8 is shifted to the inner flame tube 6 side, and yellow fire in the combustion chamber 8 can be prevented from causing unstable combustion, which is stable during strong combustion. Can form a burned combustion. In addition, the throttle unit 19 and the second throttle unit 2
In the outer flame cylinder 7 facing 0, the non-hole portion lower 40 and the non-hole portion upper 41
Since the throttle portion 19 and the second throttle portion 20 are provided, it is possible to prevent a large amount of air from being easily sent into the combustion chamber 8 and prevent yellow fire from entering the combustion chamber 8. Aperture part 1
Since a considerable amount of air easily flows through the portion that faces 9 and the second throttle portion 20, when the outer flame cylinder 7 is provided with an air hole, the size of the air hole is not so large. However, yellow fire is mixed in the combustion chamber. According to the experiment, if the diameter is 1.2 mm or less, such a problem does not occur, but if the diameter is more than 1.2 mm, yellow fire is considerably mixed into the combustion chamber 8, resulting in unstable combustion. However, the portion facing the throttle portion 19 and the second throttle portion 21 is a very unstable portion. The portion facing the throttle portion 19 is a portion where air flows into the combustion chamber 8 and a portion where unburned gas leaks to the circulation region 21. Therefore, if an air hole is provided in that portion, flame holding may be attached or disappeared. Therefore, noise may be generated during combustion, or the flame F H may vibrate. In order to prevent this, it is preferable to provide the lower non-hole portion 40. Similarly, with respect to the outer flame cylinder 7 facing the second throttle portion 20, this portion is a portion that flows into the combustion chamber 8 from the circulation region 21 and a portion that flows into the air passage 24. Therefore, it is desirable to provide the non-perforated portion upper portion 41 in order to prevent the combustion from becoming unstable.
次に灯芯１の露出高さを低くして燃焼量を小さくしてい
くと、火炎は次第に燃焼室８内に下降していき、火炎は
第２図に示すFLのように形成される。この場合の流れも
強燃焼時と同様であるが、気化ガスは大巾に減少してい
るので制流域26a,26b,26cに洩入する未燃ガス量も減少
する。洩入した未燃ガスは通気孔２８や通気部３０で供
給される空気によって混合され、ほとんどが燃焼室８に
供給され火炎FLで燃焼される。つまり洩入した未燃ガス
は通気孔２８や通気部３０で供給される空気により、火
炎FLより上方へ流れることを遮蔽される。この遮蔽効果
により、火炎FLより上方の制流域26cおよび空気導入路
２７には未燃ガスがほとんど含まれておらず、火炎上方
の内炎筒６と空気孔１１や開孔部１３から排出される空
気は清浄である。Next, when the exposed height of the wick 1 is lowered to reduce the amount of combustion, the flame gradually descends into the combustion chamber 8, and the flame is formed as FL shown in FIG. The flow in this case is similar to that in the case of strong combustion, but since the vaporized gas is greatly reduced, the amount of unburned gas leaking into the restricted regions 26a, 26b, 26c is also reduced. Unburned gas MoIri are mixed by the air supplied by the ventilation hole 28 and ventilation unit 30, mostly is burned in are supplied to the combustion chamber 8 the flame F L. That the air unburned gas MoIri is supplied by the vent hole 28 and the ventilation unit 30, are shielded to flow upward from the flame F L. This shielding effect discharge, does not contain most of unburned gases in the flame F L from above of the braking basin 26c and the air introduction path 27, from the flame above the inner flame tube 6 and the air hole 11 and the openings 13 The air being cleaned is clean.
また、循環域２１に洩出した未燃ガスについても第二絞
り部２０により燃焼室８内に導びかれ、大部分が火炎FL
で燃焼される。弱燃焼時には燃焼室８と空気通路２４の
上昇通気力を比較すると燃焼室８の方が高くなってい
る。そのため、中間部１８の開孔率を赤熱部１７の開孔
率ほど大きくしていなくても、未燃ガスは大部分燃焼室
８内へ流れる。また、それは間隙S2をS1より広くしてい
ても、同じである。そのため空気通路２４に流れる未燃
ガスはほとんどなくなり火炎FLより上方の外炎筒７の透
孔１６より排出される空気は比較的清浄なものとなる。
つまり弱燃焼時においても比較的清浄な空気が排出され
るために排ガス特性（CO/CO2）は良好なものとなる。し
たがってかなり低いところまで燃焼量を絞ることがで
き、燃焼調節巾は広いものとなる。Furthermore, the unburned gas out mode to the circulation zone 21 also he Shirubebi into the combustion chamber 8 by the second throttle portion 20, the majority flame F L
Burned in. When the combustion chamber 8 and the air passage 24 have a rising aeration force during weak combustion, the combustion chamber 8 is higher. Therefore, most of the unburned gas flows into the combustion chamber 8 even if the porosity of the intermediate portion 18 is not as large as the porosity of the red heat portion 17. Moreover, it is the same even if the gap S 2 is made wider than S 1 . Therefore air unburnt gas flowing in the air passage 24 is discharged from the through hole 16 of the almost eliminates the flame F L from above of the outer flame cylinder 7 is relatively clean ones.
In other words, the exhaust gas characteristics (CO / CO 2 ) are good because relatively clean air is discharged even during weak combustion. Therefore, the combustion amount can be narrowed down to a considerably low position, and the combustion adjustment range becomes wide.
ただし、中間部１８の開孔率を余り小さくしすぎると、
未燃ガスが再流入しにくくなり、空気通路２４に未燃ガ
スが流れ易くなり、特性上好ましくない。そのため中間
部１８の開孔率としては、気孔部１５の開孔率より大き
くしておくことが必要である。また、間隙S2を余り広く
しすぎていても、同じことになるので、S1とS2の差は実
験によれば、２mm以下が望ましい。また、中間部１８の
開孔率を大きくすることと、間隙S1とS2の差を小さくす
ることは、同じ効果を持つことになるので、中間部１８
の開孔率を気孔部１５と赤熱部１８の中間で、設定すれ
ば、間隙S1とS2が、同寸法であってもかまわない時もあ
る。ただし、その安定域を広げるには、間隙S2がS1より
広い方が望ましい。また、強燃焼時の場合に述べた様
に、絞り部１９、第二絞り部２０と対向する外炎筒７の
部分は非常に不安定な部分である。特に、弱燃焼時にお
いては、燃焼室８にかかる上昇通気力が少なくなってい
るために、絞り部１９や第二絞り部２０と対向する外炎
筒７に空気孔１１を設けていた場合には保炎が不安定と
なってしまう。そのために燃焼音が発生したりすること
がある。これを防ぐためにも、絞り部１９や第二絞り部
２０と対向する外炎筒７には無孔部である無孔部下４
０、無孔部上４１を設けることが望ましい。それによ
り、強燃焼から弱燃焼まで安定した燃焼を形成し、排ガ
ス特性も良好な燃焼装置とすることができる。However, if the aperture ratio of the intermediate portion 18 is too small,
The unburned gas is less likely to flow in again, and the unburned gas easily flows into the air passage 24, which is not preferable in terms of characteristics. Therefore, the porosity of the intermediate portion 18 needs to be larger than the porosity of the pores 15. Further, even if the gap S 2 is made too wide, the same result is obtained. Therefore, the difference between S 1 and S 2 is preferably 2 mm or less according to experiments. In addition, increasing the porosity of the intermediate portion 18 and decreasing the difference between the gaps S 1 and S 2 have the same effect.
If the open area ratio is set at the midpoint between the pore portion 15 and the red heat portion 18, the gaps S 1 and S 2 may have the same dimensions in some cases. However, in order to widen the stable region, it is desirable that the gap S 2 is wider than S 1 . Further, as described in the case of strong combustion, the portion of the outer flame cylinder 7 facing the throttle portion 19 and the second throttle portion 20 is a very unstable portion. Particularly, at the time of weak combustion, since the upward ventilation force applied to the combustion chamber 8 is small, when the air hole 11 is provided in the outer flame cylinder 7 facing the throttle portion 19 and the second throttle portion 20, Makes the flame holding unstable. Therefore, combustion noise may occur. In order to prevent this, the outer flame cylinder 7 facing the throttle portion 19 and the second throttle portion 20 has a non-hole lower portion 4 which is a non-hole portion.
0, it is desirable to provide the non-perforated part 41. As a result, stable combustion can be formed from strong combustion to weak combustion, and a combustion device with excellent exhaust gas characteristics can be obtained.
以上のことより、中間部１８の開孔率を赤熱部１７の開
孔率と大差ない程大きくすると、強燃焼時に燃焼室８内
に黄火が混入し、不安定な燃焼となってしまう。その際
にそれを防ぐために、間隙S2をS1より広くして、燃焼室
８内に黄火が混入することを防いでいる。逆に、中間部
１８の開孔率を気孔部１５の開孔率と大差ない程小さく
すると、弱燃焼時に未燃ガスが燃焼室８内に流入しにく
くなり、排ガス特性上好ましくない。そのため、中間部
１８の開孔率としては、赤熱部１７の開孔率より小さ
く、気孔部１５の開孔率より大きくしておくことが必要
となる。その際には、間隙S2をS1より広くしていても、
上昇通気力は空気通路２４よりも燃焼室８の方が高いの
で、未燃ガスは燃焼室８に流れることにより、そこで完
全燃焼し、排ガス特性の悪化を防ぐことになる。また、
絞り部１９及び第二絞り部２０と対向する外炎筒７には
無孔部４０、無孔部上４１を形成していることにより、
燃焼室８内に黄火が混入したり、保炎が不安定なために
生じる燃焼音や火炎の揺らいだりする不安定な燃焼とな
ることもなくなる。それにより、強燃焼から弱燃焼まで
安定した燃焼を形成し、排ガス特性も良好な燃焼装置と
することができる。From the above, if the porosity of the intermediate portion 18 is made so large as to be substantially the same as the porosity of the red-hot portion 17, yellow fire is mixed in the combustion chamber 8 during strong combustion, resulting in unstable combustion. In that case, in order to prevent this, the gap S 2 is made wider than S 1 to prevent yellow fire from entering the combustion chamber 8. On the contrary, if the porosity of the intermediate portion 18 is made so small that it is not so different from the porosity of the porosity portion 15, unburned gas becomes difficult to flow into the combustion chamber 8 during weak combustion, which is not preferable in terms of exhaust gas characteristics. Therefore, the open area ratio of the intermediate portion 18 needs to be smaller than the open area ratio of the red heat portion 17 and larger than the open area ratio of the pores 15. In that case, even if the gap S 2 is wider than S 1 ,
Since the rising ventilation force is higher in the combustion chamber 8 than in the air passage 24, the unburned gas flows into the combustion chamber 8 and is completely combusted there, thereby preventing deterioration of exhaust gas characteristics. Also,
By forming the non-perforated portion 40 and the non-perforated portion upper portion 41 in the outer flame cylinder 7 facing the throttle portion 19 and the second throttle portion 20,
It is also possible to prevent unstable combustion in which a yellow fire is mixed into the combustion chamber 8 or the flame holding is unstable and the combustion noise and the flame fluctuate. As a result, stable combustion can be formed from strong combustion to weak combustion, and a combustion device with excellent exhaust gas characteristics can be obtained.
発明の効果 以上のように本発明の燃焼装置によれば、外炎筒の下方
の対向する位置に設けた外筒の絞り部と、絞り部上方に
さらに第二絞り部を設け、絞り部と第二絞り部の間と対
向する外炎筒の空気孔の開孔率は、絞り部の下方と対向
する外炎筒の空気孔の開孔率より大きく、第二絞り部の
上方と対向する外炎筒の空気孔の開孔率より小さくして
いることにより、微弱燃焼の際に外炎筒外方に洩出した
未燃ガスが開孔率の大きな空気孔を通し燃焼室内に導い
て、火炎より上方へ未燃ガスが流れるのを防ぐ。その結
果、高濃度のＣＯを含んだ未燃ガスが直接大気に放出さ
れることはなくなり、広範囲の燃焼量の可変域におい
て、排ガス特性（CO/CO2）を良好なものとすることがで
きる。また、強燃焼のときには、第二絞り部より下方と
対向する外炎筒の開孔率を、それより上方の外炎筒の開
孔率より小さくし、かつ第二絞り部の径を絞り部の径よ
りも大きくしているので、第二絞り部により多量の空気
が燃焼室内に流入し、燃焼室内に黄火が混入し、不安定
な燃焼となることもなくなる。また、絞り部及び第二絞
り部と対向する外炎筒には無孔部を形成していることに
より、燃焼室内に黄火が混入したり、保炎が不安定なた
めに生じる燃焼音や火炎の揺らいだりする不安定な燃焼
となることもなくなり、使用性、安全性、快適性、見栄
えに優れた燃焼装置を提供できる。EFFECTS OF THE INVENTION As described above, according to the combustion apparatus of the present invention, the throttle portion of the outer cylinder provided below the outer flame cylinder at a position facing each other, and the second throttle portion above the throttle portion, and the throttle portion are provided. The opening ratio of the air holes of the outer flame cylinder facing between the second throttle parts is larger than the opening ratio of the air holes of the outer flame cylinder facing the lower part of the throttle part, and faces the upper part of the second throttle part. By making it smaller than the opening ratio of the air holes in the outer flame cylinder, the unburned gas leaked outside the outer flame cylinder during weak combustion is introduced into the combustion chamber through the air holes with a large opening ratio. , Prevents unburned gas from flowing above the flame. As a result, the unburned gas containing a high concentration of CO is not directly released to the atmosphere, and the exhaust gas characteristics (CO / CO 2 ) can be improved in a wide range of variable combustion amount. . Further, when the combustion is strong, the aperture ratio of the outer flame cylinder facing the lower part of the second throttle part is made smaller than the aperture ratio of the outer flame cylinder above it, and the diameter of the second throttle part is reduced. Since the second throttle portion causes a large amount of air to flow into the combustion chamber and yellow fire is mixed into the combustion chamber, unstable combustion does not occur. In addition, since the nonflame portion is formed in the outer flame cylinder facing the throttle portion and the second throttle portion, a yellow noise is mixed in the combustion chamber, and combustion noise caused by unstable flame holding It is possible to provide a combustion device that is excellent in usability, safety, comfort, and appearance, because unstable combustion with fluctuating flames will not occur.
第１図は本発明の一実施例における燃焼装置の要部断面
図であり、強燃焼時を示す。第２図は同燃焼装置の要部
断面図であり、弱燃焼時を示す。第３図は従来例を示す
燃焼装置の要部断面図である。 １……灯芯、６……内炎筒、７……外炎筒、８……燃焼
室、９……外筒、１１……空気孔、１９……絞り部、２
０……第二絞り部、２５……制流筒、26a、26b、26c……
制流域、４０……無孔部下、４１……無孔部上。FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention, showing a state of strong combustion. FIG. 2 is a cross-sectional view of the main part of the same combustion device, showing a state of weak combustion. FIG. 3 is a sectional view of a main part of a combustion apparatus showing a conventional example. 1 ... wick, 6 ... inner flame cylinder, 7 ... outer flame cylinder, 8 ... combustion chamber, 9 ... outer cylinder, 11 ... air hole, 19 ... throttle part, 2
0 …… Second throttle part, 25 …… Control tube, 26a, 26b, 26c ……
Restricted area, 40 ... Underneath the hole, 41 ... Unovergoing area.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−139908（ＪＰ，Ａ) 特開 昭62−155424（ＪＰ，Ａ) 実開 昭58−148416（ＪＰ，Ｕ) 実開 昭61−39213（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-1-139908 (JP, A) JP-A-62-155424 (JP, A) Actually open 58-148416 (JP, U) Actual-open Sho 61- 39213 (JP, U)
Claims (2)
筒内方に配された多数の空気孔を有する内炎筒と、前記
外炎筒と前記内炎筒間に形成される燃焼室下端に設定さ
れた燃料供給用の灯芯と、前記外炎筒外方には、前記外
炎筒に向かって絞り部を設けた外筒と、前記絞り部上方
に設けた第二絞り部を備え、前記第二絞り部の上方と対
向する外炎筒の空気孔は大孔とし、前記第二絞り部の下
方の対向する外炎筒の空気孔は小孔とする二つに分け、
さらに絞り部の上方と対向する外炎筒の空気孔は小孔と
し、前記絞り部の下方と対向する前記外炎筒の空気孔は
さらに小孔とする二つに分け、それと共に、前記絞り
部、第二絞り部と対向する前記外炎筒にはそれぞれ無孔
部下、無孔部上を設けた燃焼装置。1. An outer flame cylinder having a large number of air holes, an inner flame cylinder having a large number of air holes arranged inside the outer flame cylinder, and a space formed between the outer flame cylinder and the inner flame cylinder. A wick for fuel supply set at the lower end of the combustion chamber, an outer cylinder provided with a throttle part outside the outer flame cylinder toward the outer flame cylinder, and a second throttle provided above the throttle part. Part of the outer flame cylinder facing the upper side of the second throttle part is a large hole, and the air hole of the outer flame cylinder facing the lower side of the second throttle part is a small hole. ,
Further, the air hole of the outer flame cylinder facing the upper side of the throttle portion is a small hole, and the air hole of the outer flame cylinder facing the lower side of the throttle portion is further divided into two small holes. And a second non-perforated portion of the outer flame cylinder facing the second throttle portion, respectively.
り部の径よりも大きくした、特許請求の範囲第１項記載
の燃焼装置。2. The combustion device according to claim 1, wherein the diameter of the second throttle portion provided above the throttle portion is larger than the diameter of the throttle portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328568A JPH0637965B2 (en) | 1987-12-24 | 1987-12-24 | Combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328568A JPH0637965B2 (en) | 1987-12-24 | 1987-12-24 | Combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01169219A JPH01169219A (en) | 1989-07-04 |
| JPH0637965B2 true JPH0637965B2 (en) | 1994-05-18 |
Family
ID=18211727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62328568A Expired - Lifetime JPH0637965B2 (en) | 1987-12-24 | 1987-12-24 | Combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637965B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58148416U (en) * | 1982-03-29 | 1983-10-05 | 株式会社コロナ | Combustion tube of oil burning equipment |
| JPS6139213U (en) * | 1984-08-09 | 1986-03-12 | 松下電器産業株式会社 | combustion tube |
| JPH0672681B2 (en) * | 1985-12-27 | 1994-09-14 | 松下電器産業株式会社 | Combustion device |
-
1987
- 1987-12-24 JP JP62328568A patent/JPH0637965B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01169219A (en) | 1989-07-04 |
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