JPH02103303A - Combustion apparatus - Google Patents
Combustion apparatusInfo
- Publication number
- JPH02103303A JPH02103303A JP63255138A JP25513888A JPH02103303A JP H02103303 A JPH02103303 A JP H02103303A JP 63255138 A JP63255138 A JP 63255138A JP 25513888 A JP25513888 A JP 25513888A JP H02103303 A JPH02103303 A JP H02103303A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- flame
- air
- fuel nozzle
- combustion chamber
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 71
- 239000000446 fuel Substances 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims description 10
- 238000013021 overheating Methods 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000004071 soot Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Combustion Of Fluid Fuel (AREA)
- Gas Burners (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、家庭用給湯機、暖房器、調理器等の熱源機に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to heat source devices such as domestic water heaters, space heaters, and cooking devices.
従来の技術
従来のこの種の燃焼装置は、第３図に示すように、円筒
状燃焼室兼熱交換器ｌ°に曲部（ｒ部）９を設け、機器
内での占有空間を可能な限り少なくしていた。（例えば
、実開昭６１〜１５３８５４号公報）発明が解決しよう
とする課題
しかしながら上記のような構成では、燃焼方法によって
次の様な課題を有していた。即ち部分予混合燃焼（ブン
ゼン炎状燃焼）では伸長火炎あるいは高温ガスが曲部（
ｒ部）に衝突し局部的に過熱し材料の耐久性を損なうと
いった課題を、一方拡散燃焼では伸長した輝炎が曲部（
ｒ部）に衝突し局部的過熱と同時に火炎が冷却されかつ
燃焼用空気の混合が抑制されて煤を発生しやすいといっ
た課題を有していた。また、この局部的過熱を可能な限
り避けようとするとノズル・炎孔近傍よりかなり長い距
離を隔てた位置に曲部（ｒ部）を設けなければならない
といった課題を有していた。BACKGROUND OF THE INVENTION As shown in Fig. 3, a conventional combustion device of this type has a curved part (r part) 9 in the cylindrical combustion chamber and heat exchanger l°, which makes it possible to occupy space within the equipment. I kept it to a minimum. (For example, Japanese Utility Model Application Publication Nos. 61-153854) Problems to be Solved by the Invention However, the above configuration has the following problems depending on the combustion method. In other words, in partially premixed combustion (Bunsen flame combustion), the elongated flame or high-temperature gas
On the other hand, in diffusion combustion, the elongated luminous flame collides with the curved part (
(r part), the flame is locally overheated and simultaneously cooled, and the mixing of combustion air is suppressed, making it easy to generate soot. Furthermore, in order to avoid this localized overheating as much as possible, there is a problem in that a curved part (r part) must be provided at a position that is considerably longer than the vicinity of the nozzle/flame hole.
本発明はかかる従来の課題を解消するもので、部分予混
合・拡散再燃焼方法を問わず燃焼室兼熱交換器の曲部（
ｒ部）の局部的過熱を抑制すると同時に曲部（ｒ部）に
沿った火炎を形成することを目的とするものである。The present invention solves such conventional problems, and regardless of the partial premixing or diffusion reburning method, the curved part of the combustion chamber and heat exchanger (
The purpose of this is to suppress local overheating of the curved section (r section) and at the same time form a flame along the curved section (r section).
課題を解決するための手段
上記課題を解決するために本発明の燃焼装置は、二重の
円筒状の内・外燃焼室と、前記内・外燃焼室に連結した
送風機と、前記内燃焼室の略中央に燃料ノズルとその外
周に案内羽根と、そして前記燃料ノズルより下流の前記
内・外燃焼室の曲部に少な（とも−個の連通孔を備えた
ものである。Means for Solving the Problems In order to solve the above problems, the combustion device of the present invention includes double cylindrical inner and outer combustion chambers, a blower connected to the inner and outer combustion chambers, and the inner combustion chamber. A fuel nozzle is provided approximately in the center of the fuel nozzle, a guide vane is provided on the outer periphery of the fuel nozzle, and a small number of communicating holes are provided in the curved portions of the inner and outer combustion chambers downstream of the fuel nozzle.
作用
本発明は上記構成により、送風機から燃焼用空気の一部
が外燃焼室へ、他は内燃焼室へと供給される。内燃焼室
へ供給された空気は案内羽根を通過しながら燃料ノズル
と燃焼室内壁との間に旋回流を形成し、下流へと減衰し
ながら曲部を経由して流出する。一方、外燃焼室へ供給
された空気は曲部に設けられた一個ないし複数個の連通
孔より内燃焼室へと流入する。燃料ノズルより噴出され
た燃料は形成された旋回空気の剪断力による旋回を受け
ながら混合を行い、点火源により燃料・空気の境界面に
火炎を形成しつつ下流へと伸びる。Operation The present invention has the above-mentioned configuration, so that part of the combustion air is supplied from the blower to the outer combustion chamber, and the other part is supplied to the inner combustion chamber. The air supplied to the internal combustion chamber forms a swirling flow between the fuel nozzle and the combustion chamber wall while passing through the guide vanes, and flows out via the curved portion while being attenuated downstream. On the other hand, the air supplied to the outer combustion chamber flows into the inner combustion chamber through one or more communication holes provided in the curved portion. The fuel ejected from the fuel nozzle mixes while being swirled by the shear force of the swirling air that is formed, and extends downstream while forming a flame at the fuel/air interface due to the ignition source.
一方、曲部では流体への遠心力の作用により密度勾配の
変化（曲部の外側が密度が高くなる）が生じかつ旋回力
の減衰が生じ、火炎は曲部の外側に寄りつつ燃焼室壁へ
と推進するが、この曲部に設けられた一個ないし複数個
の連通孔を経由して外燃焼室へ供給された空気が内燃焼
室へと流入し、再びこの火炎を燃焼室中央へと押し戻す
。この結果、伸長した火炎を曲部に沿って形成させる。On the other hand, at a curved section, the action of centrifugal force on the fluid causes a change in the density gradient (density becomes higher on the outside of the curved section) and attenuation of the swirling force, causing the flame to move toward the outside of the curved section and move toward the combustion chamber wall. However, the air supplied to the outer combustion chamber flows into the inner combustion chamber through one or more communication holes provided in this curved part, and the flame is propelled to the center of the combustion chamber again. Push back. As a result, an elongated flame is formed along the bend.
従って火炎は曲部に衝突することなく曲って安定した火
炎を形成し、曲部での局部的過熱も抑制出来また煤の発
生も抑制出来る。従って炎孔からの距離も短くして曲部
を設けることが出来る。さらに連通孔を内燃焼室の流れ
に沿うように設けることにより、内燃焼室へ流入しつつ
伸長してきた火炎を再度強力に包み剪断力によって旋回
流の中に巻き込み再び火炎を曲部に沿って形成させる。Therefore, the flame bends without colliding with the curved portion to form a stable flame, and local overheating at the curved portion can be suppressed, as well as the generation of soot. Therefore, the distance from the flame hole can be shortened and a curved portion can be provided. Furthermore, by providing the communication holes along the flow of the internal combustion chamber, the flame that has expanded while flowing into the internal combustion chamber is strongly wrapped again and drawn into the swirling flow by shearing force, causing the flame to flow again along the curved part. Let it form.
実施例 以下、本発明の実施例を添付図面に基づいて説明する。Example Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図〜第２図において、ｌ、 ２は二重の円筒状の
内・外燃焼室で熱交換器を兼ねている。In Figures 1 and 2, 1 and 2 are double cylindrical inner and outer combustion chambers that also serve as heat exchangers.
この内・外燃焼室１，２の上流の送風機３より送風ボッ
クス４を介して燃焼用空気が供給されている。内燃焼室
１内の略中実軸上には保炎フランジ５を有する燃料ノズ
ル６が燃料管７に接続して設けである。そして保炎フラ
ンジ５の上流で、内燃焼室１と燃料管７とに連接して案
内羽根８が設けである。さらに内燃焼室ｌ兼熱交換器の
燃料ノズル６より下流の曲部９には外燃焼室と通じる連
通孔１０が設けである。Combustion air is supplied from a blower 3 upstream of the inner and outer combustion chambers 1 and 2 via a blower box 4. A fuel nozzle 6 having a flame-holding flange 5 is provided on a substantially solid shaft within the internal combustion chamber 1 and connected to a fuel pipe 7 . A guide vane 8 is provided upstream of the flame stabilizing flange 5 and connected to the internal combustion chamber 1 and the fuel pipe 7. Furthermore, a communication hole 10 communicating with the outer combustion chamber is provided in the curved portion 9 downstream of the fuel nozzle 6 of the inner combustion chamber 1/heat exchanger.
上記構成において、燃料は燃料管７を経由して燃料ノズ
ル６から内燃焼室ｌ兼熱交換器内に噴出する。一方、燃
焼用空気も送風機３より送風ボックス４を経由して内・
外燃焼室１．２に供給されている。この内燃焼室１に供
給されている燃焼用空気は案内羽根８を通過後に所定の
旋回流を形成し、保炎フランジ５．燃料ノズル６の周囲
を取巻きながら下流へと流出する。燃焼用空気が流れて
から所定の時間後、点火源（記載せず）が作動しての後
に燃料が燃料ノズル６より噴出し即座に着火して、保炎
フランジ５上に長火炎を形成する。In the above configuration, fuel is injected from the fuel nozzle 6 into the internal combustion chamber 1/heat exchanger via the fuel pipe 7. On the other hand, combustion air is also passed through the blower box 4 from the blower 3 to the inside.
It is supplied to the outer combustion chamber 1.2. The combustion air supplied to the inner combustion chamber 1 forms a predetermined swirling flow after passing through the guide vanes 8, and the flame-holding flange 5. The fuel flows out downstream while surrounding the fuel nozzle 6. After a predetermined period of time after the combustion air flows, an ignition source (not shown) is activated, and then fuel is ejected from the fuel nozzle 6 and immediately ignited, forming a long flame on the flame-holding flange 5. .
この時、火炎は燃料とそれを取巻く空気との境界面に剪
断力による旋回火炎が形成される。下流にいくにつれて
燃焼用空気流の旋回力も減衰するが、曲部９の連通孔１
０から流入する空気が、遠心力による空気の密度勾配の
偏り（曲りの外側が高い）を分散・均一化し長火炎を包
み込む。従ってこの空気流の流れに沿って火炎も曲げら
れる。この結果、火炎は曲部９に衝突することなく曲が
って安定した火炎を形成し、曲部９での局部的過熱を抑
制し煤の発生を抑制することが出来る。At this time, a swirling flame is formed due to shear force at the interface between the fuel and the air surrounding it. The swirling force of the combustion air flow also decreases as it goes downstream, but the communication hole 1 of the curved portion 9
The air flowing in from 0 disperses and equalizes the uneven air density gradient (higher on the outside of the bend) due to centrifugal force, and envelops the long flame. Therefore, the flame is also bent along the flow of this air flow. As a result, the flame bends without colliding with the curved portion 9 to form a stable flame, suppressing local overheating at the curved portion 9 and suppressing the generation of soot.
第二の実施例に関しては、第一実施例における連通孔１
０の向きを内燃焼室１の旋回流に沿うように設けたもの
であり、構成・作用はまったく同一である。内燃焼室１
の旋回流に沿うように設けたことにより、外燃焼室２か
ら内燃焼室ｌへ空気が流入する際に、遠心力による空気
の密度勾配の偏りを同心円上の均一勾配に強力に変換し
長火炎を包み込む。この結果、−層強力に火炎を曲部９
に沿わせて曲げ安定した長火炎を形成し、■局部的過熱
の抑制、■煤の発生を抑制することが出来る。Regarding the second embodiment, the communication hole 1 in the first embodiment
0 is provided along the swirling flow of the internal combustion chamber 1, and the configuration and operation are exactly the same. Internal combustion chamber 1
When air flows from the outer combustion chamber 2 to the inner combustion chamber 1, it strongly converts the deviation of the density gradient of the air due to centrifugal force into a uniform gradient on concentric circles. Envelop the flame. As a result, the flame is strongly transmitted to the curved part 9.
A stable long flame can be formed by bending along the curve, and it is possible to (1) suppress local overheating and (2) suppress the generation of soot.
発明の効果
以上のように本発明は、二重の円筒状の内・外燃焼室と
、前記内・外燃焼室に連結した送風機と、前記内燃焼室
の略中央に燃料ノズルとその外周に案内羽根と、そして
前記燃料ノズルより下流の前記内・外燃焼室の曲部に一
個ないし複数個の連通孔を、そして連通孔を前記内燃焼
室内の流れに沿うように備えた燃焼装置であるので、曲
部で火炎が衝突せず曲部に沿った火炎を形成し、曲部の
局部的過熱を防止することが出来るし、煤の発生をも抑
制することが出来る。また、炎孔からの距離も短くして
曲部を設けることが出来るので一層のコンパクト化が可
能となる。Effects of the Invention As described above, the present invention has dual cylindrical inner and outer combustion chambers, a blower connected to the inner and outer combustion chambers, a fuel nozzle approximately in the center of the inner combustion chamber, and a fuel nozzle on the outer periphery thereof. A combustion device comprising a guide vane and one or more communication holes in curved parts of the inner and outer combustion chambers downstream of the fuel nozzle, and the communication holes are provided along the flow inside the inner combustion chamber. Therefore, the flames do not collide at the curved portion, and the flame is formed along the curved portion, thereby preventing local overheating of the curved portion and suppressing the generation of soot. Further, since the distance from the flame hole can be shortened and a curved portion can be provided, further compactness is possible.
第１図は本発明の一実施例における燃焼装置の菓１図
ある。
】・・・・・・内燃焼室、２・・・・・・外燃焼室、３
・・・・・・送風機、６・・・・・・燃料ノズル、８・
・・・・・案内羽根、９・・・・・・曲部（ｒ部）、１
０・・・・・・連通孔。
代理人の氏名 弁理士 粟野重孝 はか１名１・−内燃
ｆ９１霊
？ −・ ５） 際 焼 菫
９−−一 曲 部
１０−・−１１孔
図
第
図
？
Ｉ ・・−
２−・
３ ・・
？ ・・
ＩＯ・−
内 だ １ 室
外 燃 滉 型
ｉｊ！ 凰 魯
メー≦廖ｌトノ；辷ル
宮内卯橿
曲 部
１通Ｌ
・・・ た＃Ｌ 室
Ｏ！ 風 豫
一−−ＸＳノズ
ー・−白 部FIG. 1 is a diagram of a combustion device according to an embodiment of the present invention. ]...Inner combustion chamber, 2...Outer combustion chamber, 3
...Blower, 6...Fuel nozzle, 8.
...Guide vane, 9...Curved part (r part), 1
0...Communication hole. Name of agent: Patent attorney Shigetaka Awano Haka 1 person 1 - Internal combustion F91 ghost? -・ 5) Tsukiyaki Sumire 9--1 curve part 10--11 hole diagram ? I ・・− 2−・ 3 ・・ ?・・IO・− Inside 1 Outdoor combustion type ij!凰 LUME≦廖lトノ；辷る宮内婯橿橿 字 1 L ... た＃L Room O! Kaze Yuichi--XS Nozu--White part
Claims (2)
た二重の円筒状の内・外燃焼室と、前記内燃焼室の略中
央に燃料ノズルとその外周に案内羽根と、前記燃料ノズ
ルより下流の前記内・外燃焼室の曲部に少なくとも一個
の連通孔を備えた燃焼装置。(1) A blower for sending combustion air, a double cylindrical inner and outer combustion chamber connected to the blower, a fuel nozzle approximately in the center of the inner combustion chamber, a guide vane around the outer periphery of the fuel nozzle, and the fuel nozzle. A combustion device comprising at least one communication hole in a curved portion of the inner and outer combustion chambers further downstream.
１）記載の燃焼装置。(2) Claim (
1) The combustion device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63255138A JPH02103303A (en) | 1988-10-11 | 1988-10-11 | Combustion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63255138A JPH02103303A (en) | 1988-10-11 | 1988-10-11 | Combustion apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02103303A true JPH02103303A (en) | 1990-04-16 |
Family
ID=17274613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63255138A Pending JPH02103303A (en) | 1988-10-11 | 1988-10-11 | Combustion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02103303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369866A (en) * | 2001-06-13 | 2002-12-24 | Katsuyoshi Inai | Sauna device |
-
1988
- 1988-10-11 JP JP63255138A patent/JPH02103303A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369866A (en) * | 2001-06-13 | 2002-12-24 | Katsuyoshi Inai | Sauna device |
| JP4601211B2 (en) * | 2001-06-13 | 2010-12-22 | 井内 勝義 | Sauna equipment |
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