JPH0512614B2 - - Google Patents
Info
- Publication number
- JPH0512614B2 JPH0512614B2 JP63315716A JP31571688A JPH0512614B2 JP H0512614 B2 JPH0512614 B2 JP H0512614B2 JP 63315716 A JP63315716 A JP 63315716A JP 31571688 A JP31571688 A JP 31571688A JP H0512614 B2 JPH0512614 B2 JP H0512614B2
- Authority
- JP
- Japan
- Prior art keywords
- fan
- air volume
- fuel supply
- supply amount
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 42
- 238000002485 combustion reaction Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
- F23N2233/08—Ventilators at the air intake with variable speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/16—Fuel valves variable flow or proportional valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はバーナへ燃焼用空気を強制供給するフ
アンの実風量を検出する手段を設けた燃焼装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion apparatus provided with means for detecting the actual air flow rate of a fan that forcibly supplies combustion air to a burner.
燃焼用空気供給フアンの検出実風量を燃焼制御
に用いるものとして、燃料供給量と最適フアン風
量との設定相関関係に基づき、フアンの検出実風
量を燃料供給量の調整値に対応する最適フアン風
量に維持するように、フアンを自動能力調整させ
る型式のものを先に開発した。
The detected actual air volume of the combustion air supply fan is used for combustion control, and based on the set correlation between the fuel supply amount and the optimal fan air volume, the detected actual air volume of the fan is used as the optimal fan air volume that corresponds to the adjusted value of the fuel supply amount. We first developed a model that automatically adjusts the fan's ability to maintain the same level of performance.
すなわち、風量不足の原因となる排気風路閉塞
（異物等により排気が阻害されること）等のトラ
ブルが生じても、フアンの実風量を検出監視し
て、その検出実風量をその時の燃料供給量の調整
値に対応する最適フアン風量に維持するようにフ
アン能力を自動的に調整させることにより、排気
風路閉塞等に起因した風量不足による不完全燃焼
の発生（フアン回転数やフアン印加電圧を燃料供
給量の調整値に対応する値に単に自動調整するだ
けの型式では防止できないもの）を防止するよう
にしたものである。 In other words, even if a problem occurs such as exhaust air passage blockage (exhaust is obstructed by foreign objects, etc.) that causes insufficient air volume, the actual air volume of the fan is detected and monitored, and the detected actual air volume is used to determine the current fuel supply. By automatically adjusting the fan capacity to maintain the optimal fan air volume corresponding to the adjusted value, incomplete combustion can occur due to insufficient air volume due to exhaust air passage blockage (fan rotation speed and fan applied voltage). This method is designed to prevent problems that cannot be prevented with a type that simply automatically adjusts the fuel supply amount to a value corresponding to the adjusted value of the fuel supply amount.
しかし、先に開発したものにおいても、排気風
路閉塞等に伴うフアン能力の増大側への自動調整
において、フアン能力が上限にまで達してしまう
と、それ以上には風量不足を回避できなくてやは
り不完全燃焼の発生を招くこととなり、その点、
風量不足の原因となる排気風路閉塞等のトラブル
に対して不完全燃焼の発生をより一層確実に防止
し得る技術の開発が未だ必要であつた。
However, even with the previously developed system, when the fan capacity reaches its upper limit during automatic adjustment to increase the fan capacity due to exhaust air passage blockage, etc., the insufficient air volume cannot be avoided any further. This will still lead to incomplete combustion, and in that respect,
There is still a need to develop a technology that can more reliably prevent incomplete combustion from occurring due to problems such as exhaust air passage blockages that cause insufficient air volume.
本発明の目的は、フアンの検出実風量を用いた
合理的な燃焼制御により、排気風路閉塞等に起因
した不完全燃焼の発生を確実た防止できるように
する点にある。 An object of the present invention is to reliably prevent the occurrence of incomplete combustion due to exhaust air passage blockage, etc., through rational combustion control using the actual air flow rate detected by the fan.
本発明による燃焼装置の特徴構成は、バーナへ
燃焼用空気を強制供給するフアンの実風量を検出
する手段を設けるのに対し、燃料供給量と下限フ
アン風量との設定相関関係に基づいて、検出フア
ン風量が燃料供給量の調整値に対応する下限フア
ン風量末満となつたときに、燃料供給量を設定量
だけ自動的に減少させる不完全燃焼抑制手段を設
けたことにあり、その作用・効果は次の通りであ
る。
The characteristic configuration of the combustion device according to the present invention is that, while it is provided with means for detecting the actual air volume of the fan that forcibly supplies combustion air to the burner, it is detected based on a set correlation between the fuel supply amount and the lower limit fan air volume. This is achieved by providing an incomplete combustion suppressing means that automatically reduces the fuel supply amount by a set amount when the fan airflow reaches the lower limit of the fan airflow corresponding to the adjusted value of the fuel supply amount. The effects are as follows.
つまり、検出フアン風量が燃料供給量の調整値
に対応する下限フアン風量未満となるのは、その
時の燃料供給量の調整値に対して実際の風量が排
気風路閉塞等に起因して設計上不足となつたとき
であるから、その時に燃料供給量を設定量だけ自
動的に減少させれば、フアン能力が上限に達して
いたとしても、燃料供給量との相関において風量
不足を回避できて、排気風路閉塞等に起因した不
完全燃焼の発生を確実に防止できる。
In other words, the reason why the detected fan airflow is less than the lower limit fan airflow corresponding to the adjusted value of the fuel supply amount is because the actual airflow is lower than the adjusted value of the fuel supply amount at that time due to exhaust air passage blockage, etc. If the fuel supply amount is automatically reduced by the set amount at that time, even if the fan capacity has reached the upper limit, the lack of air volume can be avoided in relation to the fuel supply amount. , it is possible to reliably prevent the occurrence of incomplete combustion due to exhaust air passage blockage, etc.
その結果、不完全燃焼に対する安全性を従前に
比して大巾に向上できて、信頼性の高い燃焼装置
とし得るに至つた。
As a result, the safety against incomplete combustion has been greatly improved compared to the conventional combustion apparatus, and a highly reliable combustion apparatus has been achieved.
次に実施例を説明する。 Next, an example will be described.
第１図は燃焼装置の一例としてのガス給湯器を
示し、バーナ１、及び、そのバーナ１からの燃焼
ガスにより流水を加熱するフインチユーブ型の熱
交換器２をケーシング３に内装し、ケーシング３
の一端には、整風板４を介してバーナ１へ燃焼用
空気を強制供給すると共に、熱交換器２を通過さ
せた燃焼ガスをケーシング他端の排気風路５を介
して強制排気するフアン６を接続してある。 FIG. 1 shows a gas water heater as an example of a combustion device, in which a burner 1 and a finch-tube heat exchanger 2 for heating flowing water with the combustion gas from the burner 1 are installed in a casing 3.
At one end, there is a fan 6 that forcibly supplies combustion air to the burner 1 via the air baffle plate 4 and forcibly exhausts the combustion gas that has passed through the heat exchanger 2 via the exhaust air passage 5 at the other end of the casing. is connected.
７はバーナ１への燃料供給量であり、燃料供給
量調整用の電磁比例弁８を介装してある。 Reference numeral 7 indicates the amount of fuel supplied to the burner 1, and an electromagnetic proportional valve 8 for adjusting the amount of fuel supplied is interposed.
ケーシング３内においてバーナ１と熱交換器２
との間の燃焼室部分９と、整風板４よりも上流側
の空気室部分１０とは、外部連通管１１により連
通させてあり、この外部連通管１１には、通過風
速検出に基づきフアン６の実風量Ｑを出力するた
めの風速センサー１２を装備してある。 Burner 1 and heat exchanger 2 in casing 3
The combustion chamber portion 9 between the air conditioning plate 4 and the air chamber portion 10 on the upstream side of the air baffle plate 4 are communicated with each other by an external communication pipe 11. It is equipped with a wind speed sensor 12 for outputting the actual air volume Q.
１３は燃焼運転制御を司るコントローラであ
り、このコントローラ１３は基本的には下記(イ)，
(ロ)を実行する。 13 is a controller in charge of combustion operation control, and this controller 13 basically performs the following (a),
Execute (b).
(イ) 給湯温度センサ１４による検出湯温を設定さ
れた湯温に維持するように、電磁比例弁８を自
動操作して燃料供給Ｇを調整する。(a) The electromagnetic proportional valve 8 is automatically operated to adjust the fuel supply G so that the hot water temperature detected by the hot water supply temperature sensor 14 is maintained at the set hot water temperature.
(ロ) 予め記憶させた第２図に示す如き、燃料供給
量Ｇと最適フアン風量との設定相関関係laに基
づき、風速センサ１２による検出フアン風量Ｑ
をその時の燃料供給量Ｇの調整値Gaに対応す
る最適フアン風量Qaに維持するように、フア
ン６を自動能力調整する。(b) The detected fan air volume Q by the wind speed sensor 12 is based on the preset correlation l a between the fuel supply amount G and the optimal fan air volume as shown in FIG.
The capacity of the fan 6 is automatically adjusted so as to maintain Qa at the optimal fan air volume Qa corresponding to the adjustment value Ga of the fuel supply amount G at that time.
すなわち、上述(イ)，(ロ)の運転制御により、空
燃比を適切に保つようにしながら燃料供給量を
調整して、設定湯温の湯を連続的に生成するよ
うにしてある。 That is, through the operation controls described in (a) and (b) above, the fuel supply amount is adjusted while maintaining an appropriate air-fuel ratio to continuously generate hot water at the set hot water temperature.
上述(イ)，(ロ)の基本運転制御に加えてコントロ
ーラ１３には下記Ｇ(ハ)の制御を実行させるよう
にしてある。 In addition to the basic operation controls described in (a) and (b) above, the controller 13 is configured to execute the control shown in G (c) below.
(ハ) 予め記憶させた同第２図に示す如き、燃料
供給量と下限フアン風量との設定相関関係lbに
基づき、上述(ロ)の実行にかかわらず検出フアン
風量Ｑが燃料供給量Ｇの調整値Gaに対応する
下限フアン風量Qbよりも小さい値Qcとなつた
ときに、フアン能力が既に上限に達していると
判断して、燃料供給量Ｇを下限フアン風量側の
設定相関関係lb上で検出フアン風量Qcに対応す
る値Gcまで減少させるように電磁比例弁８を
自動操作する。(c) Based on the pre-memorized correlation l b between the fuel supply amount and the lower limit fan airflow rate as shown in Fig. 2, the detected fan airflow rate Q is determined to be the fuel supply amount G regardless of the execution of the above (b). When the value Qc becomes smaller than the lower limit fan air volume Qb corresponding to the adjustment value Ga, it is determined that the fan capacity has already reached the upper limit, and the fuel supply amount G is set to the lower limit fan air volume side setting correlation l. On b , the electromagnetic proportional valve 8 is automatically operated to reduce the detected fan air volume Qc to a value Gc corresponding to the detected fan air volume Qc.
すなわち、風量不足の原因となる排気風路閉
塞等が生じても、フアン６の実風量検出に基づ
く前述(ロ)の制御によるフアン能力の増大側への
自動調整により空燃比が適切に保たれて、排気
風路閉塞等に起因した風量不足による不完全燃
焼の発生が防止されるが、それにしても、排気
風路閉塞等に伴うフアン能力の増大側への調整
において、フアン能力が上限に達してしまう
と、それ以上は前述(ロ)をもつても風量不足を回
避できず不完全燃焼の発生を招くこととなつて
しまう。 In other words, even if an exhaust air passage blockage occurs that causes insufficient air volume, the air-fuel ratio can be maintained appropriately by automatically adjusting to increase the fan capacity through the control described in (b) above based on the detection of the actual air volume of the fan 6. This prevents the occurrence of incomplete combustion due to insufficient air flow due to exhaust air duct blockage, etc., but even so, when adjusting the fan capacity to increase due to exhaust air duct blockage, etc., the fan capacity reaches its upper limit. If this happens, even if the above-mentioned (b) is used, insufficient air volume cannot be avoided and incomplete combustion will occur.
そこで、上述(ハ)の制御をもつて、フアン能力
限界状態では燃料供給量Ｇを減少側に自動調整
することにより、燃料供給量に対して風量が決
定的に不足となることを回避し、もつて、排気
風路閉塞等に起因した風量不足による不完全燃
焼の発生を確実に防止するようにしてある。 Therefore, with the control described in (c) above, by automatically adjusting the fuel supply amount G to the decreasing side in the fan capacity limit state, it is possible to avoid the air volume becoming decisively insufficient with respect to the fuel supply amount, In addition, incomplete combustion due to insufficient air volume due to exhaust air passage blockage, etc., is reliably prevented from occurring.
コントローラ１３には、前述(イ)，(ロ)，(ハ)の制
御に加えて、更に下記(ニ)，(ホ)，(ヘ)の制御機能を
備えさせてある。 In addition to the control functions (a), (b), and (c) described above, the controller 13 is further provided with the following control functions (d), (e), and (f).
(ニ) 前述(ハ)の制御の実行に伴いランプやブザー等
の報知手段により異常状態を報知する。(d) In accordance with the execution of the control described in (c) above, an abnormal state is notified by a notification means such as a lamp or a buzzer.
(ホ) フアン６の停止時、すなわち、燃焼運転停止
時に風速センサ１２による検出フアン風量を自
動的に０点調整する。(e) When the fan 6 is stopped, that is, when the combustion operation is stopped, the fan air volume detected by the wind speed sensor 12 is automatically adjusted to zero.
(ヘ) 前述(イ)，(ロ)の制御の実行において（第２図参
照）、例えば燃料供給量ＧをG1からG2（G1＜
G2、あるいは、G1＞G2）へ調整変更する際、
検出フアン風量Ｑが元の値Q1から燃料供給量
Ｇの調整目標値G2に対応する最適フアン風量
Q2に至るように先ずフアン能力制御（前述(ロ)
の制御）の実行を開始し、そして、そのフアン
能力制御の実行過程において、検出フアン風量
Ｑと燃料供給量Ｇとかが最適フアン風量側の設
定相関関係laを満足する状態を維持するように
しながら、燃料供給量Ｇを調整目標値G2にま
で変更調整する。(f) In executing the control in (a) and (b) above (see Figure 2), for example, the fuel supply amount G is changed from G 1 to G 2 (G 1 <
When changing the adjustment to G 2 or G 1 > G 2 ),
Optimal fan air volume corresponding to the detected fan air volume Q from the original value Q 1 to the adjusted target value G 2 of the fuel supply amount G
To reach Q 2 , first control the fan capacity (see (b) above).
Then, in the process of executing the fan capacity control, the detected fan air volume Q and the fuel supply amount G are maintained in a state that satisfies the set correlation l a on the optimum fan air volume side. At the same time, the fuel supply amount G is changed and adjusted to the adjustment target value G2 .
換言すれば、燃料供給量Ｇの調整変更時にお
いて過渡的に空燃比が適切値からズレてしまう
ことを回避するために、フアン風量Ｑと燃料供
給量Ｇとを最適フアン風量側の設定相関関係la
に沿つて変化させるようにしてある。 In other words, in order to avoid the air-fuel ratio transiently deviating from the appropriate value when changing the adjustment of the fuel supply amount G, the fan air flow rate Q and the fuel supply amount G are set to have a correlation on the side of the optimal fan air flow rate. l a
It is designed to change according to.
次に別実施例を列記する。 Next, another example will be listed.
(a) フアンの実風量を検出する手段としては種々
の型式のものを適用でき、前述実施例の如く連
通管１１に風速センサ１２を装備する型式に限
定されるものではない。(a) Various types of means for detecting the actual airflow rate of the fan can be used, and are not limited to the type in which the communication pipe 11 is equipped with the wind speed sensor 12 as in the aforementioned embodiment.
(b) 燃料供給量に対して下限フアン風量をどの程
度に設定するかは設計上適宜決定すれば良く、
又、検出フアン風量が燃料供給量の調整値に対
応する下限フアン風量未満となつたときに減少
させる燃料供給量の減少巾（設定量）について
も、一義的に設定しておくようにしたり、ある
いは、前述実施例の如く燃料供給量と下限フア
ン風量との設定相関関係上で決定させるように
したりする等、種々の設定形態を採用できる。(b) How much the lower limit fan airflow should be set relative to the fuel supply amount can be determined as appropriate in the design;
Also, the amount of reduction (set amount) of the fuel supply amount to be reduced when the detected fan air volume becomes less than the lower limit fan air volume corresponding to the adjustment value of the fuel supply amount is also set uniquely. Alternatively, various setting forms can be adopted, such as making the determination based on the set correlation between the fuel supply amount and the lower limit fan air volume as in the above-mentioned embodiment.
(c) 本発明は、燃料供給量の調整変更にかかわら
ずフアンを一定の能力で運転する型式のものに
も適用できる。(c) The present invention can also be applied to a type of fan that operates at a constant capacity regardless of changes in the fuel supply amount.
(d) フアンはバーナへ燃焼用空気を押込供給する
型式、あるいは、吸入供給する型式のいずれで
あつても良い。(d) The fan may be of the type that forces and supplies combustion air to the burner, or the type that sucks and supplies it.
(e) 本発明は、排気風路閉塞に限らず、外風によ
る排気風路への逆風圧印加や燃焼用空気取入経
路における詰り等々、風量不足の原因となり得
る種々の外乱的支障に対して有効である。(e) The present invention is applicable not only to exhaust air duct blockage, but also to various disturbances that can cause insufficient air volume, such as adverse wind pressure applied to the exhaust air duct by external wind and clogging in the combustion air intake path. It is valid.
尚、特許請求の範囲の項に図面との対照を便利
にする為に符号を記すが、該記入により本発明は
添付図面の構造に限定されるものではない。 Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
第１図及び第２図は本発明の実施例を示し、第
１図は装置構成図、第２図は燃料供給量と検出フ
アン風量とについてのグラフである。
１……バーナ、６……フアン、lb……設定相関
関係、Ｑ……検出フアン風量、Ｇ……燃料供給
量。
FIGS. 1 and 2 show an embodiment of the present invention, with FIG. 1 being a diagram of the configuration of the device, and FIG. 2 being a graph of the amount of fuel supplied and the amount of detected fan air. 1... Burner, 6... Fan, l b ... Setting correlation, Q... Detection fan air volume, G... Fuel supply amount.
Claims (1)
６の実風量を検出する手段を設けた燃焼装置であ
つて、燃料供給量と下限フアン風量との設定相関
関係lbに基づいて、検出フアン風量Ｑが燃料供給
量Ｇの調整値に対応する下限フアン風量末満とな
つたときに、燃料供給量Ｇを設定量だけ自動的に
減少させる不完全燃焼抑制手段を設けた燃焼装
置。1 A combustion device equipped with a means for detecting the actual air volume of a fan 6 that forcibly supplies combustion air to the burner 1, which detects the detected fan air volume based on a set correlation l b between the fuel supply amount and the lower limit fan air volume. A combustion device provided with an incomplete combustion suppressing means that automatically reduces the fuel supply amount G by a set amount when Q reaches the lower limit fan air volume corresponding to the adjusted value of the fuel supply amount G.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63315716A JPH02161208A (en) | 1988-12-14 | 1988-12-14 | Fuel-burning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63315716A JPH02161208A (en) | 1988-12-14 | 1988-12-14 | Fuel-burning equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02161208A JPH02161208A (en) | 1990-06-21 |
| JPH0512614B2 true JPH0512614B2 (en) | 1993-02-18 |
Family
ID=18068680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63315716A Granted JPH02161208A (en) | 1988-12-14 | 1988-12-14 | Fuel-burning equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02161208A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT406512B (en) * | 1992-10-12 | 2000-06-26 | Vaillant Gmbh | METHOD FOR MAINTAINING THE MAXIMUM AND / OR MINIMUM PERFORMANCE OF A WATER HEATER HAVING A GAS BURNER |
| EP0781966A1 (en) * | 1994-08-31 | 1997-07-02 | Gastar Co., Ltd. | Combustion equipment for judging abnormality or life |
| ES2170360T3 (en) * | 1997-10-17 | 2002-08-01 | Riello Spa | COMBINED GAS AND AIR REGULATION SYSTEM TO REGULATE COMBUSTION IN BOILERS HEATED BY GAS. |
| JP3922409B2 (en) * | 1997-11-26 | 2007-05-30 | 株式会社日立ハウステック | Combustion control device |
-
1988
- 1988-12-14 JP JP63315716A patent/JPH02161208A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02161208A (en) | 1990-06-21 |
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