JPS6242202B2 - - Google Patents
Info
- Publication number
- JPS6242202B2 JPS6242202B2 JP5195083A JP5195083A JPS6242202B2 JP S6242202 B2 JPS6242202 B2 JP S6242202B2 JP 5195083 A JP5195083 A JP 5195083A JP 5195083 A JP5195083 A JP 5195083A JP S6242202 B2 JPS6242202 B2 JP S6242202B2
- Authority
- JP
- Japan
- Prior art keywords
- flame hole
- cooling
- flame
- hole plate
- combustion
- 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
Links
- 238000001816 cooling Methods 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 238000005219 brazing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 nitrate ions Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は炎孔冷却手段を有する強制予混合ガス
バーナに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a forced premix gas burner with flame hole cooling means.
従来例の構成とその問題点
従来の強制予混合ガスバーナは、例えば給湯機
に用いた場合には第３図〜第５図に示すように、
断面が矩形であつて一端開放の筒状をしており、
両側面のステンレス製の炎孔板１に設けられた小
孔を炎孔２としたものであつた。またこのバーナ
の上下部は炎孔板１と同質のステンレス等の板金
部材３により構成され、開放端にはフランジ４が
設けられており、混合気室５がこのフランジ４に
固定されていて、混合気供給口６が設けられてい
る。また、炎孔板１には冷却パイプ７が炎孔板１
の内面に左右３本づつ固定されている。また炎孔
板１と板金部材３により構成されるバーナ内部の
空間は混合気流路８である。また前記冷却パイプ
７はＵベンド９により連結される。Configuration of conventional example and its problems When a conventional forced premix gas burner is used in a water heater, for example, as shown in Figs. 3 to 5,
It has a rectangular cross section and a cylindrical shape with one end open.
The flame holes 2 were small holes provided in stainless steel flame hole plates 1 on both sides. Further, the upper and lower parts of this burner are constructed of sheet metal members 3 made of stainless steel or the like that are the same as the flame hole plate 1, and a flange 4 is provided at the open end, and a mixture chamber 5 is fixed to this flange 4. A mixture supply port 6 is provided. In addition, the cooling pipe 7 is connected to the flame hole plate 1.
There are three wires fixed on the left and right sides of the inner surface. Further, the space inside the burner constituted by the flame hole plate 1 and the sheet metal member 3 is a mixture flow path 8. Further, the cooling pipes 7 are connected by a U-bend 9.
このバーナは上部に熱交換器１０を有する密閉
された燃焼室１１内に設けられている。冷却パイ
プ７は給水パイプ１２から分岐して接続されてい
て、燃焼室ドラム１３から熱交換器１０への給水
経路に対してバイパス経路を構成している。 The burner is located in a closed combustion chamber 11 with a heat exchanger 10 above. The cooling pipe 7 is branched from and connected to the water supply pipe 12, and constitutes a bypass path with respect to the water supply path from the combustion chamber drum 13 to the heat exchanger 10.
上記構成において、混合気供給口６より流入す
るガス燃料と空気の予混合気は、フアンを用いて
強制的に混合されており、燃焼に必要な空気量の
100％以上を混合した完全予混合気である。この
混合気の燃焼は完全予混合燃焼、もしくは全一次
空気式燃焼と呼ばれ、ブンゼン燃焼のごとく二次
空気を全く必要としないので、火炎は一次炎のみ
であり、いわゆる外炎が発生しない。よつて火炎
は短かいので高負荷燃焼を実現できる大きなメリ
ツトを有している。しかし、反面、高温の火炎が
炎孔の近傍で形成されるので炎孔が、火炎からの
ふく射により高温となり逆火してしまうので非常
に危険である。このため炎孔を冷却することが不
可欠であつた。よつて従来は多孔板１に冷却パイ
プ７を固着し、冷却水を給水管より分岐して通水
し、炎孔を冷却する方法がとられていた。しかし
多孔板１と冷却パイプ７の固着は、冷却パイプ７
の断面が円であり、平板である炎孔板１に止め金
等で固定しても線接触で、しかも完全には接触せ
ず、確実な冷却効果を期待できないので、ロー付
による方法が一般に用いられていた。しかし、炎
孔板１は多くの場合ステンレス製なので、表面に
酸化皮膜ができていて、通常の炉中ロー付（例え
ば窒素雰囲気炉，プロパン雰囲気炉等）では固着
できない。よつて真空炉、あるいは水素雰囲気炉
等の炉を用いた複雑な工程によるロー付方法を用
いるので製造コストが非常に高くなる欠点があつ
た。しかし、前記の方法により冷却パイプ７をロ
ー付された炎孔板１は、燃焼時に冷却パイプ７の
近傍では、通常のガスバーナの炎孔温度よりも低
温に冷却される反面、冷却パイプ７相互の中心付
近では高温になるため局部的に変形を生じる。よ
つて変形のくり返しによる金属疲労の原因とな
り、耐久性を劣化させる欠点があつた。さらに冷
却パイプ７がロー付されている近傍の炎孔板１の
表面は異常に冷却されるので低燃焼量の時には、
火炎の基部が接触して硫酸イオン，硝酸イオン等
を含んだ結露水が生じるので腐食の原因となつて
いた。また火炎の基部が冷却されると燃焼反応を
妨げCOを発生するので安定した燃焼が継続でき
なかつた。 In the above configuration, the premixture of gas fuel and air flowing in from the mixture supply port 6 is forcibly mixed using a fan, and the amount of air required for combustion is reduced.
This is a completely premixed mixture of 100% or more. Combustion of this mixture is called fully premixed combustion or all primary air combustion, and unlike Bunsen combustion, it does not require any secondary air, so the flame is only the primary flame, and so-called external flames do not occur. Therefore, since the flame is short, it has the great advantage of being able to achieve high-load combustion. However, on the other hand, since a high-temperature flame is formed near the flame hole, the flame hole becomes hot due to radiation from the flame and can cause backfire, which is extremely dangerous. For this reason, it was essential to cool the flame hole. Therefore, conventionally, a method has been adopted in which a cooling pipe 7 is fixed to the perforated plate 1 and cooling water is branched from a water supply pipe and passed therethrough to cool the flame hole. However, the fixation of the perforated plate 1 and the cooling pipe 7 is due to the fact that the cooling pipe 7
has a circular cross section, and even if it is fixed to the flame hole plate 1, which is a flat plate, with a stopper, etc., it will be a line contact, and it will not contact completely, so a reliable cooling effect cannot be expected, so brazing is generally used. It was used. However, since the flame hole plate 1 is often made of stainless steel, an oxide film is formed on the surface and cannot be fixed by ordinary furnace brazing (for example, a nitrogen atmosphere furnace, a propane atmosphere furnace, etc.). Therefore, since the brazing method is a complicated process using a vacuum furnace or a hydrogen atmosphere furnace, the production cost is extremely high. However, the flame hole plate 1 to which the cooling pipes 7 are brazed by the method described above is cooled to a temperature lower than the flame hole temperature of a normal gas burner in the vicinity of the cooling pipes 7 during combustion. Near the center, the temperature becomes high, causing local deformation. As a result, repeated deformation causes metal fatigue, which has the disadvantage of deteriorating durability. Furthermore, the surface of the flame hole plate 1 near where the cooling pipe 7 is brazed is abnormally cooled, so when the combustion amount is low,
When the base of the flame comes into contact, condensed water containing sulfate ions, nitrate ions, etc. is generated, causing corrosion. Furthermore, when the base of the flame cools, it interferes with the combustion reaction and generates CO, making it impossible to continue stable combustion.
発明の目的
本考案は前記従来の欠点を改良するもので均一
な炎孔冷却効果と構造上の特性により局部的変形
と結露を防止し、安定した燃焼を継続させるとと
もに、炉中ロー付等の高価な固定手段を用いずに
簡便かつ安価に製造し得る強制予混合ガスバーナ
を提供することを目的とするものである。Purpose of the Invention The present invention improves the above-mentioned drawbacks of the conventional method, and uses a uniform flame hole cooling effect and structural characteristics to prevent local deformation and dew condensation, to continue stable combustion, and to prevent brazing in the furnace. It is an object of the present invention to provide a forced premix gas burner that can be manufactured easily and inexpensively without using expensive fixing means.
発明の構成
この目的を実現させるため本発明では、多孔板
を円筒状に成型してその一端を閉塞して炎孔板と
し、これをフインに貫通させる。このフインに
は、冷却パイプも貫通させて冷却炎孔ユニツトと
する。このユニツトを上面開放の箱であつてしか
も混合気供給口を有する混合気室の内部に設け、
かつその上面を混合気室の上面と接合させる構成
としている。Structure of the Invention In order to achieve this object, in the present invention, a perforated plate is formed into a cylindrical shape, one end of which is closed to form a flame perforated plate, and the fins are passed through the perforated plate. A cooling pipe is also passed through this fin to form a cooling flame hole unit. This unit is installed inside a mixture chamber which is a box with an open top and has a mixture supply port,
The upper surface thereof is connected to the upper surface of the air-fuel mixture chamber.
実施例の説明
以下、本発明の一実施例の給湯機用バーナにつ
いて第１図〜第２図を用いて説明する。これらの
図において、第３図〜第５図における部材と同一
部材には同一番号を付与している。多孔板より成
る円筒形の炎孔板１がありこの底部は底板１５に
より閉塞されている。この炎孔板１には多数のア
ルミニウム製のフイン１４を貫通されているが、
このフインには冷却パイプ７も貫通されていて全
体で冷却炎孔ユニツトを形成している。この部材
は側面に混合気供給口６を開口した混合気室５の
中に収納する。この際冷却パイプ７は混合気室５
の底面を貫通して外部に出す。また冷却炎孔ユニ
ツトの上面１６と混合気室５の上面とは溶接等に
より接合されて混合気の漏洩を防止する。DESCRIPTION OF EMBODIMENTS A burner for a water heater according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In these figures, the same members as those in FIGS. 3 to 5 are given the same numbers. There is a cylindrical flame hole plate 1 made of a perforated plate, the bottom of which is closed by a bottom plate 15. This flame hole plate 1 is penetrated by a large number of aluminum fins 14,
A cooling pipe 7 is also passed through this fin, forming a cooling flame hole unit as a whole. This member is housed in a mixture chamber 5 having a mixture supply port 6 opened on the side. At this time, the cooling pipe 7 is
Penetrate the bottom of the holder and take it out to the outside. Further, the upper surface 16 of the cooling flame hole unit and the upper surface of the mixture chamber 5 are joined by welding or the like to prevent leakage of the mixture.
上記構成のバーナは、図示していないがフアン
により強制的に混合されたガスと空気の予混合気
が混合気供給口６に導かれる。混合気室５に供給
された混合気は円筒状の炎孔板の周囲に流れ、フ
イン１４の間を通り炎孔２より噴出し予混合燃焼
を行なう。燃焼中は従来例と同様に冷却パイプ７
内を冷却水が流れ炎孔板を冷却する。 In the burner having the above configuration, a premixture of gas and air forcibly mixed by a fan (not shown) is guided to the mixture supply port 6 . The mixture supplied to the mixture chamber 5 flows around the cylindrical flame hole plate, passes between the fins 14, and is ejected from the flame hole 2 to perform premix combustion. During combustion, cooling pipe 7 is used as in the conventional example.
Cooling water flows inside to cool the flame hole plate.
上記バーナでは、冷却パイプ７内に水を流通さ
せるとフイン１４を介して炎孔板１を冷却するの
で従来のごとく冷却パイプにより直接炎孔板１を
冷却する方法に比べ、炎孔板１が異常に冷却され
ることはない。またフインピツチの調整により局
部的に加熱されることも防止できるので、炎孔板
１の変形は生じにくい。よつて、くり返し変形に
よる金属疲労が防止され耐久性が向上する。また
炎孔板１は円筒型であるので、この点からも変形
防止に効果がある。また局部的に異常に冷却され
ることはないので、燃焼量を絞つた場合にも炎孔
板１の表面に結露水を生じさせず炎孔板１の腐食
を防止する。また同じ理由により火炎の基部が異
常に冷却されないので燃焼を安定して継続させる
効果がある。冷却炎孔ユニツトの加工において冷
却パイプ７は拡管あるいは圧入等によりフイン１
４に圧着できるので、従来のごとく炉中ロー付等
の高価で複雑な加工手段を用いる必要がない。よ
つて製造上のコスト低下に大きな効果がある。 In the above burner, when water flows through the cooling pipe 7, the flame hole plate 1 is cooled through the fins 14, so compared to the conventional method of directly cooling the flame hole plate 1 with the cooling pipe, the flame hole plate 1 is cooled. No abnormal cooling occurs. Further, since local heating can be prevented by adjusting the fin pitch, deformation of the flame hole plate 1 is less likely to occur. Therefore, metal fatigue due to repeated deformation is prevented and durability is improved. Further, since the flame hole plate 1 is cylindrical, it is effective in preventing deformation from this point as well. Moreover, since there is no localized abnormal cooling, even when the combustion amount is reduced, no condensation water is formed on the surface of the flame hole plate 1, and corrosion of the flame hole plate 1 is prevented. Furthermore, for the same reason, the base of the flame is not cooled abnormally, which has the effect of stably continuing combustion. In processing the cooling flame hole unit, the cooling pipe 7 is expanded or press-fitted to form the fin 1.
4, there is no need to use expensive and complicated processing means such as furnace brazing as in the past. Therefore, it has a great effect on reducing manufacturing costs.
発明の効果
以上のように本発明の強制予混合ガスバーナに
よれば次の効果を有する。Effects of the Invention As described above, the forced premix gas burner of the present invention has the following effects.
１ 炎孔板はフインを介して冷却されるので局部
的に異常に冷却されることはない。また、フイ
ンピツチを調整することにより局部的に加熱さ
れることも防止できるので炎孔板はほぼ均一に
冷却される。よつて炎孔板は局部的な熱変形を
防止されるので金属疲労による劣化を防止し、
耐久性を向上させる。1. The flame hole plate is cooled through the fins, so there is no localized abnormal cooling. Further, by adjusting the fin pitch, local heating can be prevented, so the flame hole plate can be cooled almost uniformly. Therefore, the flame hole plate is prevented from localized thermal deformation, which prevents deterioration due to metal fatigue.
Improve durability.
２ 燃焼量を絞つた場合にも、炎孔板はフインに
より間接的に冷却されているので、水管による
直接冷却に比べ異常に冷却されない。よつて火
炎の基部が炎孔板に接触しても結露水を生じな
いので、炎孔板の腐食を防止する。また火炎基
部が異常に低温となつて燃焼反応が妨げられな
いので安定した燃焼を継続できる。2 Even when the combustion amount is reduced, the flame hole plate is indirectly cooled by the fins, so it is not cooled abnormally compared to direct cooling by water pipes. Therefore, even if the base of the flame comes into contact with the flame hole plate, no condensation water is generated, thereby preventing corrosion of the flame hole plate. Further, since the flame base becomes abnormally low temperature and the combustion reaction is not hindered, stable combustion can be continued.
３ 従来構造では炎孔板と冷却パイプとの固定に
は炉中ロー付による高価な加工手段を用いなけ
ればならなかつたが、本発明では冷却パイプを
拡管することによりフインと密着できるので製
造上のコスト低減に効果がある。3 In the conventional structure, it was necessary to use an expensive processing method such as brazing in the furnace to fix the flame hole plate and the cooling pipe, but in the present invention, the cooling pipe can be expanded and brought into close contact with the fin, making it easier to manufacture. is effective in reducing costs.
第１図は本発明の一実施例である給湯機用強制
予混合ガスバーナの斜視図、第２図は第１図のバ
ーナの横断面図、第３図は従来のバーナを用いた
給湯機の断面図、第４図は従来のバーナの斜視
図、第５図は第４図のバーナの横断面図である。
１……炎孔板、５……混合気室、６……混合気
供給口、７……冷却パイプ、１４……フイン。
Fig. 1 is a perspective view of a forced premix gas burner for a water heater that is an embodiment of the present invention, Fig. 2 is a cross-sectional view of the burner shown in Fig. 1, and Fig. 3 is a diagram of a water heater using a conventional burner. 4 is a perspective view of a conventional burner, and FIG. 5 is a cross-sectional view of the burner of FIG. 4. 1...flame hole plate, 5...mixture chamber, 6...mixture supply port, 7...cooling pipe, 14...fin.
Claims (1)
と、冷却パイプとを複数のフインに貫通させた冷
却炎孔ユニツトを、上面開放の箱であつてしかも
混合気供給口を有する混合気室の内部に設け、か
つ前記冷却炎孔ユニツトの上面と前記混合気室の
上面とを接合してなる強制予混合ガスバーナ。1 A cooling flame hole unit consisting of a cylindrical flame hole plate made of a perforated plate with a closed bottom and cooling pipes passed through a plurality of fins is used to form a mixture chamber which is a box with an open top and has a mixture supply port. A forced premixed gas burner, which is provided inside the cooling flame hole unit and has an upper surface of the cooling flame hole unit and an upper surface of the air mixture chamber connected to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195083A JPS59176508A (en) | 1983-03-28 | 1983-03-28 | Forced premixture gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195083A JPS59176508A (en) | 1983-03-28 | 1983-03-28 | Forced premixture gas burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59176508A JPS59176508A (en) | 1984-10-05 |
| JPS6242202B2 true JPS6242202B2 (en) | 1987-09-07 |
Family
ID=12901150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5195083A Granted JPS59176508A (en) | 1983-03-28 | 1983-03-28 | Forced premixture gas burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59176508A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0635508Y2 (en) * | 1986-05-20 | 1994-09-14 | ソニー株式会社 | Electronic device housing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744010B1 (en) * | 1994-12-20 | 1999-09-29 | Robert Bosch Gmbh | Heater |
-
1983
- 1983-03-28 JP JP5195083A patent/JPS59176508A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0635508Y2 (en) * | 1986-05-20 | 1994-09-14 | ソニー株式会社 | Electronic device housing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59176508A (en) | 1984-10-05 |
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