JPS59142329A - Combustion control device - Google Patents
Combustion control deviceInfo
- Publication number
- JPS59142329A JPS59142329A JP58015607A JP1560783A JPS59142329A JP S59142329 A JPS59142329 A JP S59142329A JP 58015607 A JP58015607 A JP 58015607A JP 1560783 A JP1560783 A JP 1560783A JP S59142329 A JPS59142329 A JP S59142329A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- air
- pressure
- combustion
- adjusting means
- 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.)
- Granted
Links
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/02—Measuring filling height in burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/18—Measuring temperature feedwater temperature
-
- 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
-
- 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)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は負荷の大小に応じて燃焼量を可変できる能力可
変式燃焼機器において、燃焼用空気量（以下単に空気量
という）とガス量の比をほぼ一定に保ち、燃焼の安定性
と高効率を実現するとともに、燃焼量が最小の場合にお
いて、ガス種７５；変っても安定燃焼をさせるだめの特
に家庭用燃焼機器に用いられる燃焼制御装置に関する１
、従来例の構成とその問題点
従来のこの種のガス燃焼制御装置として、第１図に示す
均圧弁方式（あるいは、ゼロガノく六方式）がよく知ら
れている。すなわち送風機１により送られた空気は空気
絞り２を経て混合部３へ、ガスは均圧弁４、ガス絞り６
を経て混合部３へ入り空気とガスとが混合され、バー六
〇へ導びかれて燃焼する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a variable capacity combustion device that can vary the combustion amount depending on the magnitude of the load, by adjusting the ratio between the amount of combustion air (hereinafter simply referred to as the amount of air) and the amount of gas. This invention relates to a combustion control device that is used in particular for household combustion appliances, which maintains combustion stability and high efficiency by keeping it almost constant, and also ensures stable combustion even when the gas type changes, even when the amount of combustion is minimal. 1
2. Construction of the conventional example and its problems As a conventional gas combustion control device of this type, the pressure equalizing valve system (or zero-gauge system) shown in FIG. 1 is well known. In other words, the air sent by the blower 1 passes through the air throttle 2 to the mixing section 3, and the gas flows through the pressure equalization valve 4 and the gas throttle 6.
The air enters the mixing section 3 through the air and gas, where the air and gas are mixed, and then led to the bar 60 where it is combusted.
均圧弁４の背圧室７には空気絞り２の上流の圧力が導び
かれており、均圧弁４は均圧弁出口の圧力を背圧室７の
圧力と等しくなる様に自動調節する。The pressure upstream of the air throttle 2 is introduced into the back pressure chamber 7 of the pressure equalizing valve 4, and the pressure equalizing valve 4 automatically adjusts the pressure at the outlet of the pressure equalizing valve to be equal to the pressure in the back pressure chamber 7.
ここで空気絞りの上流の圧力をＰＡ 、空気量をＱＡ、
ガス絞りの上流の圧力をＰＧ 、ガス量をＱｃ、混合部
の圧力をＰＭとすると、空燃比ＱＡ／ＱＧは
Ｑ ｃ Ｋ ２ ｘｒｎ「Ｔｉ
Ｋ＋ 、 Ｋ２は、それぞれ空気絞り、ガス絞り及びガ
ス種によって決まる定数
の関係がある。Here, the pressure upstream of the air throttle is PA, the air amount is QA,
If the pressure upstream of the gas throttle is PG, the gas amount is Qc, and the pressure in the mixing section is PM, then the air-fuel ratio QA/QG is Q c K 2 xrn "Ti K+, K2 are the air throttle, gas throttle, and gas type, respectively. There is a constant relationship determined by
均圧弁４が理想的にＰＧ＝ＰＡＫ調節できればとなり、
ＱＡを変化させても空燃比は常に・一定となるはずであ
る。しかし、均圧弁４１ｄ′ダイアフラム８でＦＡとＰ
Ｇとの差圧を受けて弁９を機械的に動かすものであるか
ら、ダイアフラムの剛性。If the pressure equalizing valve 4 can ideally adjust PG=PAK, then
Even if QA is changed, the air-fuel ratio should always remain constant. However, in the pressure equalizing valve 41d' diaphragm 8, FA and P
Since the valve 9 is mechanically moved in response to the differential pressure between G and G, the rigidity of the diaphragm is important.
変位に伴なうダイアフラムの有効面積の変化、弁９が受
ける均圧弁入口圧力の影響等により、必ず圧力調節誤差
△Ｐｃを生じる。すなわちＰＧ＝ＰＡ＋△ＰＧあるので
、
となり、圧力調節誤差による空燃比の変動はＰＡ−ＰＭ
の値が小さくなるはど大きくなる。A pressure adjustment error ΔPc always occurs due to changes in the effective area of the diaphragm due to displacement, the influence of the equalization valve inlet pressure applied to the valve 9, and the like. In other words, since PG = PA + △PG, the air-fuel ratio fluctuation due to pressure adjustment error is PA - PM
As the value of becomes smaller, it becomes larger.
したがって、空燃比誤差を一定の範囲内に保ちながら燃
焼量の調節比を大きくとろうとすれば、ＰＡ−ＰＭの値
を大きくするか、７♂Ｇを小さくしなければならない。Therefore, in order to increase the combustion amount adjustment ratio while keeping the air-fuel ratio error within a certain range, the value of PA-PM must be increased or 7♂G must be decreased.
一方、家庭用のガス燃焼機器として給湯用あるいは暖房
用の用途では燃焼量の調節比か４ないし１／１ｏ程度必
要である。そのだめにＰＡ−ＰＭを大きくすると送風機
がきわめて大Ｎぐなるだけでなく、供給圧の低い都市ガ
ス等ではＰＡがガス供給圧より高くなり実現不可能であ
る。また、都市ガス以外のガスで実現したとしても、ガ
ス圧が低下した場合には空燃比制御精度が著しく悪化し
て良好な燃焼状態が得られなくなるという問題があった
。更にまた△Ｐｃを小さくするにも均圧弁の大きさから
限度があり、経時変化の影響、調整の困難さがあるなど
、家庭用燃焼機器への適用は難しかった。On the other hand, for domestic gas combustion equipment used for hot water supply or space heating, a combustion amount adjustment ratio of about 4 to 1/1o is required. However, if PA-PM is increased, not only will the blower become extremely large in N, but also PA will be higher than the gas supply pressure, which is not possible when using city gas, etc., where the supply pressure is low. Further, even if the method is realized using a gas other than city gas, there is a problem in that when the gas pressure decreases, the accuracy of air-fuel ratio control deteriorates significantly, making it impossible to obtain a good combustion state. Furthermore, there is a limit to reducing ΔPc due to the size of the pressure equalizing valve, and it is difficult to apply to household combustion equipment due to the effects of aging and difficulty in adjustment.
発明の目的
本発明は上記従来の問題を解消するもので送風機セ均圧
制御部を大型化することなく燃焼量調節比が大きく、か
つ空燃比安定性と高効率を実現させ、更に、燃焼量が最
小の場合においてガス種がかわっても安定燃焼をさせる
だめの燃焼制御装置を提供することを目的とするもので
ある。OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and achieves a large combustion amount adjustment ratio without increasing the size of the blower equalization control section, and achieves air-fuel ratio stability and high efficiency. It is an object of the present invention to provide a combustion control device that allows stable combustion even if the gas type changes when the amount of gas is minimal.
発明の構成
この目的を達成するために本発明は、燃料ガス系路に上
流側からガス量調節手段、ガス第１絞り部、ガス第２絞
り部をこの順に配設し、また、燃焼用空気系路には上流
側から空気量調節手段、空気絞り部を設け、前記ガス第
２絞り部と前記空気絞り部の下流側を合流して混合部を
構成し、前記ガス第２絞り部と前記空気絞り部の上流側
の圧力差を検出して電気信号を出力する差圧センサを備
え、この差圧センサの出力信号で前記ガス量調節千手段
、空気量調節手段の少なくとも・一方を制御するととも
に、燃料ガス種に対応して、前記ガス第２絞り部、及び
前記ガス第１絞り部を可変できるように構成したもので
ある。Structure of the Invention In order to achieve this object, the present invention arranges a gas amount adjusting means, a first gas throttle part, and a second gas throttle part in this order from the upstream side in the fuel gas line, and furthermore, the combustion air The system path is provided with an air amount adjusting means and an air throttle section from the upstream side, and the second gas throttle section and the downstream side of the air throttle section are merged to form a mixing section, and the second gas throttle section and the air throttle section are connected to each other. A differential pressure sensor is provided that detects a pressure difference on the upstream side of the air restrictor and outputs an electrical signal, and the output signal of the differential pressure sensor controls at least one of the gas amount adjusting means and the air amount adjusting means. In addition, the second gas throttle section and the first gas throttle section are configured to be variable in accordance with the type of fuel gas.
この構成によって、燃料ガス系路のガス第２絞り部と、
燃焼用空気系路の空気絞り部の上流側に配設した差圧セ
ンサの出力信号で前記ガス量調節手段、空気量調節手段
の少なくとも一方を制御して燃焼の安定性と高効率を保
つように空燃比をはソ一定にすることができる。With this configuration, the second gas throttle part of the fuel gas line,
At least one of the gas amount adjusting means and the air amount adjusting means is controlled by the output signal of a differential pressure sensor disposed upstream of the air throttle part of the combustion air system path to maintain combustion stability and high efficiency. The air-fuel ratio can be kept constant.
そして、ガス種に対応してガス第２絞り部、及び前記ガ
ス第１絞り部も可変させることで燃焼量が最小の時でも
ガス量調節手段が安定して制御するので燃焼状態を安定
化ならしめることが可能になる。By varying the second gas throttle section and the first gas throttle section in accordance with the type of gas, the gas amount adjusting means can stably control even when the combustion amount is at its minimum, thereby stabilizing the combustion state. It becomes possible to tighten.
実施例の説明
以下本発明の一実施例を第２図および第３図の図面に基
づき説明する。DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.
第２図において燃料ガスは燃料ガス糸路１上流からＰｌ
という圧力でガス量調節手段２（本発明一実施例ではガ
ス圧力比例制御弁で説明する。以下ガス量調節手段２の
ことをガス圧力比例制御弁と呼ぶ。）に流入し、Ｐ２’
と論う圧力に制御され、更に、ガス第１絞り部３に流入
し、ＰＧという圧力で流出し、そして、ガス第２絞り部
４を通って、混合部６に導びかれている〇
一方燃焼用空気は、空気量調節手段６（例えば、ファン
、以下空気量調節手段のことをファンと呼ぶ）から燃焼
用空気系路７を通って、空気絞り部８で所定の圧力まで
低下した後混合部６に流入する０
寸だ、ガス第２絞り部４の上流側の圧力をＰＧ。In FIG. 2, the fuel gas flows from the upstream of the fuel gas line 1 to Pl
At this pressure, the gas flows into the gas amount adjusting means 2 (in one embodiment of the present invention, a gas pressure proportional control valve will be used. Hereinafter, the gas amount adjusting means 2 will be referred to as a gas pressure proportional control valve), and P2'
Further, the gas flows into the first gas constriction section 3, flows out at a pressure of PG, passes through the second gas constriction section 4, and is led to the mixing section 6. The combustion air passes through the combustion air system path 7 from the air amount adjusting means 6 (for example, a fan, hereinafter referred to as a fan), and is reduced to a predetermined pressure at the air restricting section 8. The pressure on the upstream side of the second gas throttle section 4, which flows into the post-mixing section 6, is PG.
空気絞り部８の上流側の圧力をＰＡとすると−ＰＧとＰ
Ａの差圧を検出する差圧センサ９を備えている。そして
混合部６で燃料ガスと燃焼用空気が混合され、バーナ１
ｏで燃焼する。１１は熱交換器、１２は出湯管１３に挿
着されている温度検知器であり、１４は、ファン６を制
御するファン制御器、１６はガス量調節手段制御器であ
る。If the pressure on the upstream side of the air restrictor 8 is PA, -PG and P
A differential pressure sensor 9 is provided to detect the differential pressure of A. Then, the fuel gas and combustion air are mixed in the mixing section 6, and the burner 1
Burns at o. Reference numeral 11 is a heat exchanger, 12 is a temperature sensor inserted in the hot water outlet pipe 13, 14 is a fan controller for controlling the fan 6, and 16 is a gas amount adjusting means controller.
第３図は第２図におけるガス圧力比例制御弁２のガス種
違いによるストロークＳｔと、制御圧力Ｐ２の関係を示
す図である。FIG. 3 is a diagram showing the relationship between the stroke St of the gas pressure proportional control valve 2 in FIG. 2 for different gas types and the control pressure P2.
まづガス第１絞り部３がないとした場合（Ｐ２−ＰＧ
の場合）を説明する。First, if there is no first gas throttle part 3 (P2-PG
).
０−ｔｅｌ−Ｇ２の線分は、都市ガス等のプロノ（ンガ
スに比較して低発熱量のガスの場合の特性線図である。The line segment 0-tel-G2 is a characteristic diagram for a gas with a lower calorific value compared to proton gas such as city gas.
以下都市ガス（Ｐｊ＝ＩＱ○ｇＨ２０）を基準ガスとし
て説明する。都市ガスの０１におけるストロークＳｔは
Ｓｌであり、Ｇ２のそれはＳｓである３、そして、都市
ガスのガス圧力比例制御弁２の入口圧力Ｐ ＋ ＝１０
０ｔｍｎ Ｈ２０のときの制御圧力Ｐ２が８＋、Ｓｓに
対応してｑｌからｑ３まで安定して変化することを示し
ている。The following description will be made using city gas (Pj=IQ○gH20) as the reference gas. Stroke St of city gas in 01 is Sl, that of G2 is Ss3, and inlet pressure of gas pressure proportional control valve 2 of city gas P + =10
It is shown that the control pressure P2 at 0 tmn H20 changes stably from ql to q3 corresponding to 8+ and Ss.
まだＳｌは、ガス圧力比例制御弁２の弁座（図示せず）
、可動弁部（図示せず）の加工精度、組立精度等によっ
て決まる制御限界のストローク長さである。・つまり、
０〜Ｓ１の間は制御不安定ないしは制御不可能域である
。Still SL is the valve seat of the gas pressure proportional control valve 2 (not shown)
, is the control limit stroke length determined by the processing accuracy, assembly accuracy, etc. of the movable valve portion (not shown). ·In other words,
The range between 0 and S1 is an unstable or uncontrollable range.
都市ガスの特性線図０−Ｇｌ−０２の低勾配の線分に対
し、都市ガスと同一の定格燃焼量の場合でかつ、制御２
次圧Ｐ２がｑｌからｑ３″！で都市ガスの場合と同じよ
うに制御される場合のプロパンガスの場合には０−Ｌｌ
−Ｌ２−Ｌｓというきわめて急勾配の線分に沿って制御
されるがＬｌとＬ２の間は制御限界のストロークＳ１よ
り小さなストロークになるので実質の制御範囲はＬ２か
らＬｓであって、都市ガスと最大制御圧ｑ５は同一であ
るが、最低の圧力は、都市ガスのｑｌにはならず、これ
よりも高いｑ２になる。For the line segment with a low slope in the city gas characteristic diagram 0-Gl-02, when the rated combustion amount is the same as that of city gas and control 2
0-Ll in the case of propane gas when the next pressure P2 is controlled in the same way as city gas from ql to q3''!
-L2-Ls, which is a very steep line segment, is controlled, but between Ll and L2, the stroke is smaller than the control limit stroke S1, so the actual control range is from L2 to Ls, and city gas Although the maximum control pressure q5 is the same, the lowest pressure is not ql of city gas, but q2, which is higher than this.
ところで第２図から明らかのように、定格燃焼ｃａ１
時に必要な空気量は、発熱量１ｏｏＯ／Ｈ当り約１Ｎｒ
ｒｔ’／Ｈであるから空気絞り部８の上流の圧力ＰＡは
ガス種が変ってもはソ一定である。By the way, as is clear from Figure 2, the amount of air required for rated combustion ca1 is approximately 1Nr per 1ooO/H of calorific value.
Since rt'/H, the pressure PA upstream of the air restrictor 8 remains constant even if the gas type changes.
まだ本発明一実施例の制御装置は後述するが、空気絞り
部８及び、ガス第２絞り部４のそれぞれの上流側の圧力
ＰＡ及びＰＧがＰＡ＝ＰＧになるように制御するので、
ガス種が変っても、燃焼量の調節比（以下ＴＤＲと呼ぶ
）を同一にしようと思えば、都市ガスとプロパンガスの
ガス圧力比例制御弁２による制御圧力ＰＧははソ等しく
制御する必要がある。ところが、既に述べたようにガス
圧力比例制御弁２だけの制御で、第２図のガス第１絞り
部３がない場合には、プロパンガスの場合には制御最小
圧力はｑ２の圧力までしか制御出来ない。つまり、プロ
パンガスの場合には、ＴＤＲが小さくなってしまう。Although the control device according to the embodiment of the present invention will be described later, since the pressures PA and PG on the upstream sides of the air throttle section 8 and the second gas throttle section 4 are controlled so that PA=PG,
Even if the gas type changes, if you want to make the combustion amount adjustment ratio (hereinafter referred to as TDR) the same, the control pressure PG by the gas pressure proportional control valve 2 for city gas and propane gas must be controlled equally. be. However, as mentioned above, if only the gas pressure proportional control valve 2 is used and the first gas throttle part 3 shown in FIG. Can not. In other words, in the case of propane gas, the TDR becomes small.
Ｌ２−Ｌ３’の線分は、プロパンガスの場合において、
第２図のガス圧力比例制御弁２とガス第２絞り部・４の
中間に、ガス第１絞り部３を入れた場合を示している。The line segment L2-L3' is, in the case of propane gas,
This shows the case where the first gas throttle part 3 is inserted between the gas pressure proportional control valve 2 and the second gas throttle part 4 in FIG.
すなわち、Ｌ１２の最大定格点ではガス圧力比例制御弁
２による制御圧力Ｐ２がｑ４に、ＰＧの圧力がｑ３にな
ることを示している１、まだ燃焼量が最小になると、Ｐ
２はｑ２にＰＧはｑｌになることを示している。That is, at the maximum rating point of L12, the control pressure P2 by the gas pressure proportional control valve 2 becomes q4, and the pressure of PG becomes q3.
2 indicates that PG becomes ql in q2.
すなわち、ガス圧力比例制御弁２でｑ４から制御限界の
ｑ２までＰ２の圧力を制御すれば、ガス第１絞り部３が
挿設することでＰＧの圧力は、都市ガスの場合と同じ＜
（１３がらｑｌまで安定して制御出来るようになる。That is, if the gas pressure proportional control valve 2 controls the pressure of P2 from q4 to the control limit q2, the pressure of PG will be the same as that of city gas due to the insertion of the first gas throttle part 3.
(You will be able to stably control from 13 to ql.
上記構成において、例えば出湯管１３を通過する湯量を
変えるなどして負荷を変えると、出湯温度が変化する。In the above configuration, if the load is changed by, for example, changing the amount of hot water passing through the hot water tap pipe 13, the hot water temperature changes.
この変化する温度を温度検出器１２で検出し、ファン制
御器１４で設定温度になるように、ファン６の回転数を
制御する。その結果、空気絞り部８の上流側の圧力ＰＡ
が対応して変化するとはソ同一のタイミングで差圧セン
サ９にＰＡとＰＧにもとづく差圧が発生する。この差圧
をガス量調節手段制御器１６で処理して、ＰＡにＰＧに
なるように、ガス圧力比例制御弁２を制御するものであ
る。This changing temperature is detected by a temperature detector 12, and a fan controller 14 controls the rotation speed of the fan 6 so that the set temperature is achieved. As a result, the pressure PA on the upstream side of the air restrictor 8
A differential pressure based on PA and PG is generated in the differential pressure sensor 9 at the same timing that PA and PG change correspondingly. This differential pressure is processed by the gas amount adjusting means controller 16 to control the gas pressure proportional control valve 2 so that PA becomes PG.
まだ、ガス種が変った場合には、既に述べたように定格
燃焼量が同一であれば空気量ははソ同一であるから空気
絞り部８は一定で、ガス第２絞り部４の大きさを定格流
量でＰＡ−ｐＭ＝＝ｐＧ−ｐＭになるように定めればよ
い。そしてプロパンガスのように発熱量が大きくガス供
給圧力が高いガスの場合には、既に説明したようにガス
圧力比例制御弁２だけでは所定の最小燃焼量（第２図に
於いて、ＰＧの圧力がｑｌになるとと。）に安定して制
御できないので、ガス圧力比例制御弁２と、ガス第２絞
り部４との間に、ガス第１絞り部３を挿設することによ
って、Ｐ２はＬ３’−Ｌ２の線分、ＰＧはＬ３−Ｇ＋の
線分に沿って制御され、都市ガスのＴＤＲと同じ制御を
可能にするものである。However, if the type of gas changes, as already mentioned, if the rated combustion amount is the same, the air amount will be the same, so the air throttle part 8 will be constant, and the size of the second gas throttle part 4 will be the same. may be determined so that PA-pM==pG-pM at the rated flow rate. In the case of a gas such as propane gas, which has a large calorific value and a high gas supply pressure, as already explained, the gas pressure proportional control valve 2 alone is not sufficient to maintain the predetermined minimum combustion amount (in Fig. 2, the PG pressure Since it is not possible to stably control P2 to ql, by inserting the first gas throttle section 3 between the gas pressure proportional control valve 2 and the second gas throttle section 4, P2 becomes L3. The line segment '-L2 and PG are controlled along the line segment L3-G+, enabling the same control as the TDR of city gas.
発明の効果
以上のように、本発明の燃焼制御装置によれば燃料ガス
系路に、ガス量調節手段、ガス第１絞り部、ガス第２絞
り部を配設し、また、燃焼用空気系路には、空気量調節
手段、空気絞り部を設け、ガス第２絞り部と、空気絞り
部の下流側を合流して混合部を構成し、かつ、ガス第２
絞り部の上流側の圧力ＰＧと、空気絞り部の上流側の圧
力ＰＡの圧力差ＰＡ−Ｐｃを検出して電気信号を出力す
る差圧センサから構成し、負荷の大きさが変化しても、
常にＰｐ、 ＝Ｐａになるように差圧センサの出力信号
でガス量調節手段、空気量調節手段の少なくとも一方を
制御することにより、従来のような機械式の均圧弁に比
較してきわめて制御精度が良くなるので、送風機を小型
化できか°り、燃焼量の調節比が大きく、同時に高効率
の燃焼機器を実現させるものである。Effects of the Invention As described above, according to the combustion control device of the present invention, the gas amount adjusting means, the first gas throttle part, and the second gas throttle part are arranged in the fuel gas line, and the combustion air system The passage is provided with an air amount adjusting means and an air constriction section, and the gas second constriction section and the downstream side of the air constriction section are merged to form a mixing section, and the gas second
Consists of a differential pressure sensor that detects the pressure difference PA-Pc between the pressure PG on the upstream side of the throttle section and the pressure PA on the upstream side of the air throttle section and outputs an electrical signal, so that it can be used even if the load size changes. ,
By controlling at least one of the gas amount adjusting means and the air amount adjusting means using the output signal of the differential pressure sensor so that Pp, = Pa is always maintained, control accuracy is extremely high compared to conventional mechanical pressure equalizing valves. Since the combustion efficiency is improved, the blower can be made smaller, the combustion amount can be adjusted at a higher ratio, and at the same time, a highly efficient combustion device can be realized.
そして、ガス種に対応してガス第２絞り部、及びガス第
１絞り部を可変できるように構成したことにより、都市
ガスから供給圧力の高く、発熱量の大きいプロパンガス
まで燃焼量の調節比（ＴＤＲ）をガス種によって制限す
ることなく一定で、安定した燃焼機器の実現を可能にす
るものである。By configuring the second gas throttle part and the first gas throttle part to be variable according to the type of gas, the combustion amount adjustment ratio can be adjusted from city gas to propane gas with high supply pressure and large calorific value. This makes it possible to realize a stable combustion device with a constant (TDR) without being limited by the type of gas.
第１図は従来の燃焼制御装置の構成図、第２図は本発明
の燃焼制御装置の一実施例を示す構成図、第３図は同装
置のガス量調節手段すなわちガス圧力比例制御弁のスト
ロークと２次側制御圧力との関係及ばガス第１絞り部を
調節した場合のガス第１絞り部前後に於ける圧力変化を
示す特性図である０
１・・・・・・燃料ガス系路、２・・・・・・ガス量調
節手段（ガス圧力比例制御弁）、３・・・・・・ガス第
１絞り部、４・・・・・・ガス第２絞り部、６・・・・
・・混合部、６・・・・・・空気量調節手段（ファン）
、了・・・・・・燃焼用空気系路、８・・・・・・空気
絞り部、９・・・・・・差圧センサ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図FIG. 1 is a configuration diagram of a conventional combustion control device, FIG. 2 is a configuration diagram showing an embodiment of the combustion control device of the present invention, and FIG. It is a characteristic diagram showing the relationship between the stroke and the secondary side control pressure and the pressure change before and after the first gas throttle part when the first gas throttle part is adjusted. , 2... Gas amount adjusting means (gas pressure proportional control valve), 3... Gas first throttle section, 4... Gas second throttle section, 6...・
...Mixing section, 6...Air volume adjustment means (fan)
, Completion... Combustion air system path, 8... Air throttle section, 9... Differential pressure sensor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2
Claims (4)
とガス第２絞り部とを設け、燃焼用空気系路に臭気量調
節手段と空気絞り部とを設け、前記ガス第２絞り部と前
記空気絞り部の下流側を合流して混合部を構成するとと
もに、前記ガス第２絞り部と前記空気絞り部の上流側の
圧力差に応じて電気信号を出力する差圧センサを備え、
この差圧センサの出力信号で前記ガス量調節手段、空気
量調節手段の少なくとも一方を制御するとともに、燃料
ガス種に応じて前記ガス第２絞り部、及び前記ガス第１
絞り部を可変できるように構成した燃焼制御装置。(1) A fuel gas system path is provided with a gas amount adjusting means, a first gas restricting section, and a second gas restricting section, a combustion air system path is provided with an odor amount adjusting means and an air restricting section, and the combustion air system path is provided with an odor amount adjusting means and an air restricting section; The throttle part and the downstream side of the air throttle part are combined to form a mixing part, and a differential pressure sensor is provided that outputs an electric signal according to the pressure difference between the second gas throttle part and the upstream side of the air throttle part. Prepare,
The output signal of this differential pressure sensor controls at least one of the gas amount adjusting means and the air amount adjusting means, and also controls the second gas constriction section and the first gas constriction section depending on the fuel gas type.
A combustion control device configured so that the throttle part can be varied.
可能にした特許請求の範囲第１項記載の燃焼制御装置。(2) The combustion control device according to claim 1, wherein the first gas throttle section is built into the gas amount adjusting means and is detachable.
２絞り部を連結する管内に挿設し、着脱可會ヒにした特
許請求の範囲第１項記載の燃焼制御装置。(3) The combustion control device according to claim 1, wherein the first gas throttle part is inserted into a pipe connecting the gas amount adjusting means and the second gas throttle part, and is detachable.
毎にセットしておき、ガス種転換時には前君己セットを
着脱可能にした特許請求の範囲第１項記載の燃焼制御装
置。(4) The combustion control device according to claim 1, wherein the first gas throttle part and the second gas throttle part are set for each gas type, and the previous set is detachable when changing the gas type. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58015607A JPS59142329A (en) | 1983-02-01 | 1983-02-01 | Combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58015607A JPS59142329A (en) | 1983-02-01 | 1983-02-01 | Combustion control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59142329A true JPS59142329A (en) | 1984-08-15 |
| JPH0236857B2 JPH0236857B2 (en) | 1990-08-21 |
Family
ID=11893397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58015607A Granted JPS59142329A (en) | 1983-02-01 | 1983-02-01 | Combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59142329A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234218A (en) * | 2013-04-23 | 2013-08-07 | 台州英达机械科技有限公司 | Fuel delivering device of blast burner |
| US20140124587A1 (en) * | 2012-11-05 | 2014-05-08 | Pat Caruso | Modulating burner system |
-
1983
- 1983-02-01 JP JP58015607A patent/JPS59142329A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140124587A1 (en) * | 2012-11-05 | 2014-05-08 | Pat Caruso | Modulating burner system |
| US9528712B2 (en) * | 2012-11-05 | 2016-12-27 | Pat Caruso | Modulating burner system |
| CN103234218A (en) * | 2013-04-23 | 2013-08-07 | 台州英达机械科技有限公司 | Fuel delivering device of blast burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0236857B2 (en) | 1990-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59142329A (en) | Combustion control device | |
| JPS58224226A (en) | Combustion control device | |
| JPS5885016A (en) | Combustion control device | |
| JPS60122818A (en) | Device for controlling combustion of gas | |
| JPH033848B2 (en) | ||
| JPS5969612A (en) | Gas combustion control device | |
| JPH033847B2 (en) | ||
| JPH0633903B2 (en) | Bypass mixing type water heater | |
| JPS58224227A (en) | Combustion control device | |
| JPS59125322A (en) | Gas combustion controlling device | |
| JPS649525B2 (en) | ||
| JPS59212621A (en) | Gas combustion controller | |
| JPS59219622A (en) | Gas combustion controller | |
| JPS59212622A (en) | Gas combustion controller | |
| JPH0456221B2 (en) | ||
| JPS61250447A (en) | Control of hot-water supplier | |
| JPS6080018A (en) | Gas burning control device | |
| JPS5969613A (en) | Combustion control device | |
| JPS5997422A (en) | Gas combustion control device | |
| JPS6029516A (en) | Gas combustion controller | |
| JP3061516B2 (en) | Gas water heater | |
| JP4315615B2 (en) | Water heater | |
| JPS60211A (en) | Gas burning control device | |
| JPH0718588B2 (en) | Water heater controller | |
| JPS5997421A (en) | Combustion controlling device |