JPS6091132A - Controller of gas combustion - Google Patents
Controller of gas combustionInfo
- Publication number
- JPS6091132A JPS6091132A JP58199382A JP19938283A JPS6091132A JP S6091132 A JPS6091132 A JP S6091132A JP 58199382 A JP58199382 A JP 58199382A JP 19938283 A JP19938283 A JP 19938283A JP S6091132 A JPS6091132 A JP S6091132A
- Authority
- JP
- Japan
- Prior art keywords
- variable
- throttle
- air
- gas
- 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.)
- Pending
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
- 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
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
-
- 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
- F23N2235/02—Air or combustion gas valves or dampers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/02—Air or combustion gas valves or dampers
- F23N2235/06—Air or combustion gas valves or dampers at the air intake
-
- 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
- F23N2237/00—Controlling
- F23N2237/16—Controlling secondary air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05181—Controlling air to fuel ratio by using a single differential pressure detector
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
本発明は燃焼装置の燃焼量を可変制御するガス燃焼制御
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas combustion control device that variably controls the combustion amount of a combustion device.
従来例の構成とその問題点
従来の燃焼制御装置を第１図に示す。ガス絞り１、ガス
差圧センサ１ａ、空気絞り２、空気差圧センサ２ａの上
流側には、それぞれガス量制御弁３、燃焼用空気供給手
段４が設けられ、前記二つの絞りの下流側は合流して燃
焼室５へ導ひかれている。６は外部負荷あるいは差圧セ
ンサの出力に応じてカス量制御弁３、又は、燃焼用空気
供給手段４を制御して負荷に応じて燃焼量を可変Ｉ量制
御る制御部である。Structure of a conventional example and its problems A conventional combustion control device is shown in FIG. Upstream of the gas throttle 1, gas differential pressure sensor 1a, air throttle 2, and air differential pressure sensor 2a, a gas amount control valve 3 and combustion air supply means 4 are provided, respectively, and the downstream side of the two throttles is They merge and are led to the combustion chamber 5. Reference numeral 6 denotes a control unit that controls the waste amount control valve 3 or the combustion air supply means 4 according to the external load or the output of the differential pressure sensor to control the combustion amount by variable I amount according to the load.
第１図において、Ｐｇはガス量制御弁３の出口側圧力、
すなわちガス絞り１の上流側圧力である。In FIG. 1, Pg is the outlet side pressure of the gas amount control valve 3;
That is, it is the upstream pressure of the gas throttle 1.
Ｐａは、燃焼用空気供給手段４の出口圧力すなわち空気
絞り２の上流側圧力である。Ｐｍは燃料ガスと燃焼用空
気の合流点の圧力である。上記構成においてＰｇ 、Ｐ
ａ、Ｐｍの圧力を用いて燃料ガス流量Ｑｇ、燃焼用空気
流量Ｑａを表わすと、Ｑ ｇ ＝ Ｋ１ ｍ 、 Ｑａ
＝に２ｐカ百；となる。但し、ＫＩ Ｋ２は比例定数
である。Pa is the outlet pressure of the combustion air supply means 4, that is, the upstream pressure of the air throttle 2. Pm is the pressure at the junction of fuel gas and combustion air. In the above configuration, Pg, P
When the fuel gas flow rate Qg and the combustion air flow rate Qa are expressed using the pressures of a and Pm, Q g = K1 m, Qa
= 2p ka 100; However, KIK2 is a proportionality constant.
理論空気１Ｑａｏは、Ｋ３を定数としてｏａｏ＝に３Ｑ
ｇ＝に３’に１ ｍｍ＝下層−で表わせる。よって、空
気比をｍて表わすとｍ−Ｑａ／Ｑａ□−（Ｋ２！胃儒）
／（Ｋ３−に１！’）となり、Ｋ４＝に２／に３・Ｋ１
とおくとｍ＝に４ ヂ下７コ孟邪石下「４需） とな
る。Theoretical air 1Qao is 3Q to oao= with K3 as a constant
It can be expressed as g = 3' = 1 mm = lower layer. Therefore, if the air ratio is expressed as m, it will be m-Qa/Qa□-(K2! gastric pressure)
/(K3-to 1!'), K4=to 2/to 3・K1
Then, m = 4 も lower 7 Ko Mengya Seishi ``4 demand)''.
制御部６はすてに簡単に説明したように外部負荷に対応
して燃焼量を変ｒヒさせると同時に空気比を制御する機
能を有するものであり、空気比制御の方法は常にＰａ＝
Ｐｇとなるように、すなわちｍ ＝ Ｋ４５茜Ｔ了ｈ］
儒）
−に４、〜ｔ■７７−７】Ｕ四碧肩−ら−に４（一定）
となるようにするものである。ところが差圧センサには
出力のバラツキによる一定誤差ｅか存在し、現実には、
Ｐａ＝ＰｇとはならすにＰａ＝Ｐｇ士ｅとなるために、
空気比ｍの実際の値は
二に４ψ璽乙＝／（Ｆ彊：罫万 となる。As briefly explained above, the control unit 6 has the function of varying the combustion amount in response to the external load and controlling the air ratio at the same time, and the air ratio control method is always based on Pa=
Pg, that is, m = K45 Akane Toh]
Confucian) - ni 4, ~t■77-7] U four blue shoulders - ra - ni 4 (constant)
The purpose is to However, differential pressure sensors have a certain error due to variations in output, and in reality,
Since Pa=Pg, in order to become Pa=Pgshie,
The actual value of the air ratio m is 2 to 4 ψ 璽 ot = / (F 彊: 竫 million.
すなわち空気比ｍは（Ｐｇ Ｐｍ）の関数となる。That is, the air ratio m is a function of (Pg Pm).
第２図は横軸に（Ｐｇ−Ｐｍ）すなわちガス流滑ｏｇ縦
軸に空気比ｍをとってこの様子を図示したものである。FIG. 2 illustrates this situation by plotting (Pg-Pm), ie, gas flow og, on the horizontal axis and air ratio m on the vertical axis.
燃料ガス流量、すなわち燃、虚聞は五７１丁耳５に比例
するため、 第２図の左方が仮燃・境域を示すことにな
る。図から明らかなように、一定誤差±ｅに対して低燃
焼域で空気比ｍの誤差か急激に大きくなる。Since the fuel gas flow rate, that is, the fuel gas flow rate, is proportional to 571 to 5, the left side of Figure 2 shows the temporary combustion/boundary area. As is clear from the figure, for a constant error ±e, the error in the air ratio m suddenly increases in the low combustion range.
第３図は第２図と同じ軸を有する座標面にあらいハツチ
ングで示した燃焼良好な範囲（すなわち）イ）の線は・
繋焼良好な範囲の上限、（ロ）の線は下限である）と前
述の空気比ｍのばらつき範囲の両方を重ね合わせて表示
したものである。燃焼良好な範囲の下限値（（ロ）の線
）はバーナの燃焼特性にもよるか通常１．２〜１．４程
度でほぼ一定である。Figure 3 is on a coordinate plane with the same axis as Figure 2, and the line of the range of good combustion (i.e.) indicated by rough hatching is
The upper limit of the range with good cross-firing (the line (b) is the lower limit) and the above-mentioned variation range of the air ratio m are shown superimposed. The lower limit value (line (b)) of the range with good combustion is usually approximately constant at about 1.2 to 1.4, probably depending on the combustion characteristics of the burner.
図から明らかなように、空気比ｍのばらつきの限界値か
低燃焼域で急激に広がるため空気比ｍを高いところ、す
なわちｍ ＝ １ ＋Ａに設定する必要がある。又、逆
に空気比ｍをできるだけ小さく設定すれば、低燃焼域で
空気比ｍの誤差が急増大することにより、燃焼良好な範
囲の下限値（Ｃ１１の線から逸脱してしまうので、それ
だけ燃焼上可変範囲を狭まくする必要がある。As is clear from the figure, since the limit value of the variation in the air ratio m spreads rapidly in the low combustion range, it is necessary to set the air ratio m at a high value, that is, m = 1 + A. On the other hand, if the air ratio m is set as small as possible, the error in the air ratio m will rapidly increase in the low combustion range, and it will deviate from the lower limit of the good combustion range (C11 line), so the combustion It is necessary to narrow the upper variable range.
したがって、このような状態においては、仮燃・焼滅以
外の領域では、常に余分の燃焼用空気を供給することに
なり、排気カスによって外部に持ち去られる熱量が増大
し、熱効率の１氏下を招いていた。また、余剰の燃焼用
空気を供給するということで送風機等の燃焼用空気供給
手段が大形化（７、更に燃焼騒音の増大にもつながると
いう不具合かあった。Therefore, under such conditions, extra combustion air is always supplied in areas other than preliminary combustion and incineration, and the amount of heat carried away by the exhaust gas increases, reducing the thermal efficiency by 1 degree. I was invited. In addition, supplying surplus combustion air required the combustion air supply means such as a blower to be large (7), which also led to an increase in combustion noise.
発明の目的
本発明は、このような従来の問題点を解消するもので、
その目的とするところは、１次空気、２次空気の必要な
フンゼン式バーナにおいて、特に低ａ焼域て空気比ばら
つ養の下限曲線か下方に急拡大することを防いで、広い
燃；尭範囲にわたって１次空気比をほぼ一定に制御する
とともに、空気比を低い水準に設定して熱効率の向上を
図る一方、低燃焼域における耐風性の向上等を図ること
にある。Purpose of the Invention The present invention solves these conventional problems.
The purpose of this is to prevent the lower limit curve of the air ratio variation from rapidly expanding downward, especially in the low a firing range, in Hunsen type burners that require primary air and secondary air, and to widen the combustion range. The purpose is to control the primary air ratio to be almost constant over the range, set the air ratio to a low level to improve thermal efficiency, and to improve wind resistance in the low combustion range.
発明の構成
この目的を達成するために本発明；よ、カス昂調節手段
と可変ガス絞り及び送風機と１次空気通路に配設した可
変空気絞りの下流側を混合部で合流してバーナに導ひく
とともに前記可変カス絞り上流圧力と前記可変空気絞り
上流圧力との差を検出する差圧検出手段を具備し、前記
ガフｉ調節手段と前記可変カス絞りを制御する電気制御
部を備えて、燃焼量があらかじめ定められた設定値り、
下の領域では、前記可変カス絞り及びｍ１記可変空気絞
りが所定絞りに調節され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 consists of a gas flow adjusting means, a variable gas throttle, a blower, and a downstream side of the variable air throttle disposed in the primary air passage, which are combined in a mixing section and guided to a burner. and a differential pressure detection means for detecting the difference between the variable air throttle upstream pressure and the variable air throttle upstream pressure, and an electric control section for controlling the gaff i adjustment means and the variable air throttle, The amount is set to a predetermined value,
In the lower region, the variable waste diaphragm and the variable air diaphragm m1 are adjusted to a predetermined diaphragm.
この構成によって、燃ａＦかあらかじめ定められた設定
値を越える領域では負荷が変化すると差圧検出手段の出
力信号により空気量調節手段を制御して、ガス量に比例
した空気量をバーナに導びくことかできるとともに、燃
焼量があらかじめ定められた設定値以下の領域では、電
気制御部からの信号で可変ガス絞り及び可変空気絞りの
両絞りを流路抵抗か増大するような所定絞りに調節し更
にこの領域ては燃焼用か変（ヒしても設定値を越える領
域の場合と同様に差圧検出手段の出力信号により空気量
調節手段を制御する。With this configuration, when the load changes in a region where the fuel aF exceeds a predetermined set value, the air amount adjustment means is controlled by the output signal of the differential pressure detection means, and an air amount proportional to the gas amount is guided to the burner. In addition, in a region where the combustion amount is less than a predetermined set value, both the variable gas restriction and the variable air restriction are adjusted to a predetermined restriction that increases the flow path resistance using a signal from the electric control unit. Further, in this region, the air amount adjusting means is controlled by the output signal of the differential pressure detecting means, as in the case of the region where the combustion pressure exceeds the set value.
したがって、燃焼計かあらかじめ定められた設定値以下
の領域において、１次空気比を所定値にＩＵｌ」御した
まま空気比を増大させて空気比ばらつきの下限曲線が下
方に急拡大するのを防くことができるため、空気比を全
体的に低く設定しても、金気比が燃焼良好な範囲の下限
曲線より下方にでることがなくなる。Therefore, in the area where the combustion meter is below a predetermined set value, increasing the air ratio while controlling the primary air ratio to a predetermined value prevents the lower limit curve of air ratio variation from expanding rapidly downward. Therefore, even if the overall air ratio is set low, the metal-to-air ratio will not fall below the lower limit curve of the good combustion range.
実施例の説明
以下本発明の一実施例を第４図〜第７図を用いて説明す
る。第４図において、ガス側通路１に圧力比例弁等のガ
ス量調節手段２（以下２を圧力比例弁として説明する）
と可変ガス絞り３、駆動部３ａを設け、空気側通路４に
は送風機５．１次空気通路４ａには可変空気絞り６、駆
動部６ａが設けられている。ガスと燃・焼用空気は混合
部７で合流した後、バーナ８に導ひかれて、可変空気絞
り６の上流で分岐した２次空気通路４ｂで導ひかれた２
次空気とともに燃焼する。９は可変ガス絞り３と可変空
気絞り６の上１流側の圧力差を検出する差圧ごンサ等の
差圧検出手段、１０は差圧センサ検出回路等から構成さ
れる送風機５の回転数を：ｂ１］御する空気量調節手段
である。そして、１１は負荷の温度を検出するサーミス
タ等の温度検出器からの信号を処理する温度検出回路、
１２は温度設定器、１３はカス量調節手段２、可変ガス
絞り３及び可変空気絞り６を制御する電気制御部である
。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 7. In FIG. 4, a gas amount adjusting means 2 such as a pressure proportional valve (hereinafter 2 will be explained as a pressure proportional valve) is provided in the gas side passage 1.
The air side passage 4 is provided with a blower 5. The primary air passage 4a is provided with a variable air throttle 6 and a drive unit 6a. After the gas and the combustion air are combined in the mixing section 7, they are guided to the burner 8, and then to the secondary air passage 4b which branches off upstream of the variable air throttle 6.
Next, it burns with air. Reference numeral 9 indicates differential pressure detection means such as a differential pressure sensor that detects the pressure difference between the upstream side of the variable gas throttle 3 and the variable air throttle 6, and 10 indicates the rotation speed of the blower 5, which is comprised of a differential pressure sensor detection circuit, etc. :b1]. 11 is a temperature detection circuit that processes a signal from a temperature detector such as a thermistor that detects the temperature of the load;
Reference numeral 12 represents a temperature setting device, and reference numeral 13 represents an electric control unit that controls the waste amount adjusting means 2, the variable gas throttle 3, and the variable air throttle 6.
第５図は圧力比例弁２の制御室ｆｆ、１１制御圧力ＰＧ
、及び制御流量ＱＧの関係を示した図てあり、Ｎ１の白
線は可変ガス絞り３の絞り開度か大きい場合、Ｎ２の曲
線は小さい場合の制御圧力ＰＧと制御流量ＱＧの・特性
図、そして、Ｍの曲線は制御圧力ＰＧと制御電流１の特
性図である。Figure 5 shows the control chamber ff of the pressure proportional valve 2 and the control pressure PG of the pressure proportional valve 11.
, and the control flow rate QG, the white line for N1 is a characteristic diagram of the control pressure PG and the control flow rate QG when the throttle opening of the variable gas throttle 3 is large, and the curve for N2 is for a small case. , M are characteristic diagrams of control pressure PG and control current 1.
第６図は可変ガス絞り３の絞り開度をパラメータとした
場合の空燃比制御特性図であり、ｎｌの直線は可変カス
絞り３及び可変空気絞り６の絞り開度が大きい場合、ｎ
２は小さい場合である。FIG. 6 is an air-fuel ratio control characteristic diagram when the throttle opening of the variable gas throttle 3 is used as a parameter.
2 is a small case.
第７図は燃焼量ＱＧと空気比ｍの特性とバーナ燃焼範囲
を示した図である。ａて示された特性は差圧検出手段９
等に誤差のない場合、ｂ及びＣは誤差がともなう実際の
場合である。そして、Ａ及びＢはバーナの燃焼良好な範
囲の上限及び下限を示している。FIG. 7 is a diagram showing the characteristics of the combustion amount QG and the air ratio m, and the burner combustion range. The characteristics shown in a are the differential pressure detection means 9.
etc. without error, b and C are actual cases with errors. A and B indicate the upper and lower limits of the burner's good combustion range.
上記構成において、いま可変ガス絞り３の上流圧力ＰＧ
と可変空気絞り６の上流圧力ＰＡが等しくバーナ８か最
大定格燃焼計ＣＩＭＡＸで燃焼しているものとする。こ
の状態では可変ガス絞り３及び可変空気絞り６の絞り開
度は大きい方に設定されている。このような状態にある
とき、例えば温度設定器１２を調節してバーナ８の負荷
が小さくなるようにすると、電気制御部１３が圧力比例
弁２に対してその制＠電流ｌか減少するように作用する
のでガス量Ｑ６か減少し、かつ可変ガス絞り３の上流圧
力Ｐａも低下する。したがって、可変空気絞り６の上流
圧力へとに差圧か発生し、この差圧を差圧検出手段９で
検出するとともに差圧か零になるまで空気量調節手段１
０で、送風機の回転数か減少するように制御する。そし
て、燃焼量が最大定格からあらかじめ定められた設定値
ｑまでは、可変ガス絞り３及び可変空気絞り６の絞り開
度は大きい方に設定されて一定であるが、更にバーナＳ
の負荷か小さくなると、あらかじめ定められた設定値ｑ
に対応する電気制御部１３の圧力比例弁２への制御電流
ＩＡで、「（モカ比例弁２をｒｆｉｆ、ｆ御する一方、
可変ガス絞り３及び可変空気絞り６をその絞り開度が小
さくなるように駆動部３ａ及び駆動部６ａを制御する。In the above configuration, the upstream pressure PG of the variable gas throttle 3 is now
It is assumed that the upstream pressure PA of the variable air throttle 6 and the upstream pressure PA of the variable air restrictor 6 are equal, and combustion is being performed in the burner 8 or the maximum rated combustion meter CIMAX. In this state, the opening degrees of the variable gas throttle 3 and the variable air throttle 6 are set to be larger. In such a state, for example, if the temperature setting device 12 is adjusted to reduce the load on the burner 8, the electric control unit 13 controls the pressure proportional valve 2 so that its current l decreases. As a result, the gas amount Q6 decreases, and the upstream pressure Pa of the variable gas throttle 3 also decreases. Therefore, a pressure difference is generated upstream of the variable air restrictor 6, and this pressure difference is detected by the pressure difference detection means 9, and the air amount adjustment means 1 is operated until the pressure difference becomes zero.
0, the fan rotation speed is controlled to decrease. When the combustion amount is from the maximum rating to a predetermined set value q, the throttle openings of the variable gas throttle 3 and the variable air throttle 6 are set to a large value and are constant.
When the load becomes smaller, the predetermined set value q
With the control current IA to the pressure proportional valve 2 of the electric control unit 13 corresponding to ``(while controlling the mocha proportional valve 2 with rfif and f,
The drive unit 3a and the drive unit 6a are controlled so that the opening degrees of the variable gas throttle 3 and the variable air throttle 6 become small.
このように設定値ｑで可変ガス絞り３及びｉ丁変空気絞
り６を切換えると、第５図から明らかなように圧力比例
弁２の制御電流がｉＡからｉＢ、また制御圧力かＰＡか
らＰＢに増大する。したかつて、設定値ｑから最小燃焼
量ｑＭｘｘの領域では第５図の曲線Ｎ２て示した特性に
沿って制御圧力ＰＧが高めになるか可変空気絞り６も同
時に絞っているので１次空気比を一定にして、かつ差圧
検出手段９によりＰＧ＝ＰＡ になるように制御するの
で、２次空気量が増大し空気比ｍを高めに制御すること
ができる。When the variable gas throttle 3 and the variable air throttle 6 are switched in this way using the set value q, the control current of the pressure proportional valve 2 changes from iA to iB, and from the control pressure PA to PB, as is clear from FIG. increase In the region from the set value q to the minimum combustion amount qMxx, the control pressure PG becomes higher along the characteristic shown by curve N2 in Fig. 5, or the variable air throttle 6 is also throttled at the same time, so the primary air ratio Since it is kept constant and controlled so that PG=PA by the differential pressure detection means 9, the amount of secondary air increases and the air ratio m can be controlled to be high.
また、逆にバーナ８の負荷が大きくなると圧力比例弁２
の制御電流ｉＢて可変力゛ス絞り３及び可変空気量り６
をその絞り開度を小さい方から大きい方へ切換え、かつ
可変ガス絞り３の上流圧力ＰＧと可変空気絞り６の上流
圧力ＰＡをＰＧ＝ＰＡになるように、すなわち均圧制御
することは前述と同様である。Conversely, when the load on the burner 8 increases, the pressure proportional valve 2
A variable force throttle 3 and a variable air meter 6 are controlled by the control current iB.
As described above, the throttle opening degree is switched from the smaller one to the larger one, and the upstream pressure PG of the variable gas throttle 3 and the upstream pressure PA of the variable air throttle 6 are controlled so that PG=PA, that is, the pressure is equalized. The same is true.
このように最大定格燃焼’ｑＭＡＸからあらかじめ定め
られた設定値ｑまての領域では、可変ガス絞り３及び可
変空気絞り６の絞り開度を大きい方に固定したままで、
ガス量に比例して空気量を可変制御でき、また、設定値
ｑ以下最小燃焼量までの領域では、可変ガス絞り３及び
可変空気絞り６の絞り開度を小さい方に固定したまま同
様にガス量と空気量が比例して可変制御される構成にし
たので、この領域では差圧検出手段９等の一定誤差の正
負に拘らず空気比ｍを増大することができる。In this way, in the range from the maximum rated combustion 'qMAX to the predetermined set value q, the opening degrees of the variable gas throttle 3 and the variable air throttle 6 are fixed to the larger one,
The air amount can be variably controlled in proportion to the gas amount, and in the region below the set value q and up to the minimum combustion amount, the gas Since the configuration is such that the amount and the air amount are variably controlled in proportion, the air ratio m can be increased in this region regardless of the sign of the fixed error of the differential pressure detection means 9 and the like.
発明の効果
以上の説明から明らかのように、本発明のガス燃焼制御
装置によれは、次の効果が得られる。Effects of the Invention As is clear from the above description, the gas combustion control device of the present invention provides the following effects.
（１）燃焼量があらかじめ定められた設定値になると絞
り開度が大小切換えられる構成とした可変ガス絞り及び
可変空気絞りならびにガス量調節手段とを制御する電気
制御部を備えたことで、燃焼計可変範囲の全域にわたっ
て、ガス量と空気量は比例的に可変制御され、かつ燃焼
量かあらかじめ定められた設定値以、下の領域では、前
記可変ガス絞り及び前記可変空気絞りの絞り開度か小さ
い方に切換わり、空気比が増大した状態に制御される。(1) Equipped with an electric control unit that controls the variable gas throttle, the variable air throttle, and the gas amount adjustment means, which are configured to change the opening degree to large or small when the combustion amount reaches a predetermined set value. The gas amount and air amount are proportionally and variably controlled over the entire variable range of the meter, and in the region where the combustion amount is below a predetermined set value, the throttle opening of the variable gas throttle and the variable air throttle is controlled. is switched to the smaller one, and the air ratio is controlled to be increased.
さらに詳述すれは、前記差圧検出手段等の制御誤差によ
り特に低勿焼領域で、空気比が急減少する状態を１次空
気比を一定に維持したままで改善で・、きる。よって燃
・産量可変範囲を従来と同一に考えた場合には、空気比
を低く設定できるので、熱効率の高いしかも燃焼騒音の
低い燃：ＩＷ：、装置の実現を可能にする。More specifically, it is possible to improve the situation where the air ratio suddenly decreases, especially in the low non-burning region, due to control errors of the differential pressure detection means, etc., while maintaining the primary air ratio constant. Therefore, if the fuel/production variable range is considered to be the same as before, the air ratio can be set low, making it possible to realize a fuel (IW) device with high thermal efficiency and low combustion noise.
（２）さらに、低燃焼領域においては、差圧検出手段の
一定誤差の正負に拘らず空気比が増大するように制御さ
れるので、燃焼機器の耐風性能を向上できる。(2) Furthermore, in the low combustion region, the air ratio is controlled to increase regardless of whether the fixed error of the differential pressure detection means is positive or negative, so that the wind resistance performance of the combustion equipment can be improved.
第１図は従来の燃焼制御装置の構成図、第２図及び第３
図はその動作説明図、第４図は本発明のガス燃焼制御装
置の一実施例を示す構成図、第５図は同装置を構成して
いる圧力比例弁の電流、圧力、流量の関係を示した特性
図１．第６図は同装置のカス量と空気量の関係を示した
特性図、第７図は同装置のガス量と空気比の関係を示し
た特性図である。
１・・ガス側通路、２・・・カス量調節手段、Ｓ・・可
１変ガス絞り、４・・・空気側通路、４ａ・・１次空気
通路、４ｂ・・２次空気通路、５・・送風機、６・・可
変≧空気量り、７・・混合部、８・・・バーナ、９・・
差圧検出手段、１０・・空気量調節手段、１３・電気１
１ｉ：１町１部。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
１ 図
第２図
累３図 Ｃ″゛
第５図
Ｑｔ。
菟６図
第７図Figure 1 is a configuration diagram of a conventional combustion control device, Figures 2 and 3
Fig. 4 is a configuration diagram showing an embodiment of the gas combustion control device of the present invention, and Fig. 5 shows the relationship among current, pressure, and flow rate of the pressure proportional valve that constitutes the device. Characteristic diagram shown 1. FIG. 6 is a characteristic diagram showing the relationship between the amount of waste and air amount of the same device, and FIG. 7 is a characteristic diagram showing the relationship between the amount of gas and air ratio of the same device. 1... Gas side passage, 2... Waste amount adjustment means, S... Variable gas throttle, 4... Air side passage, 4a... Primary air passage, 4b... Secondary air passage, 5・・Blower, 6・・Variable≧air meter, 7・・Mixing section, 8・・Burner, 9・・
Differential pressure detection means, 10... Air amount adjustment means, 13. Electricity 1
1i: 1 town, 1 section. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2 Figure 3 C'' Figure 5 Qt. Figure 6 Figure 7
Claims (3)
を、空気側通路には送風機をそれぞれ配設し、この空気
側通路を１次空気通路と２次空気通路に分岐し、前記１
次空気通路には可変空気絞りを配設して、この可変空気
絞りと前記可変ガス絞りの下流側を混合部で合流してバ
ーナに導びくとともに、前記可変ガス絞りの上流圧力と
前記可変空気絞りの上流圧力との差を検出する差圧検出
手段と、前記送風機を制御する空気量調節手段を具備し
、前記ガス量調節手段を負荷に応じて制御する一方、負
荷があらかじめ定められた設定値以下の領域では前記可
変ガス絞り及び前記可変空気絞りが所定絞りになるよう
に制御する電気制御部を備えたガス燃焼制御装置。(1) A gas amount adjusting means and a variable gas throttle are provided in the gas side passage, and a blower is provided in the air side passage, and this air side passage is branched into a primary air passage and a secondary air passage, and the air passage is divided into a primary air passage and a secondary air passage. 1
A variable air restrictor is disposed in the next air passage, and the variable air restrictor and the downstream side of the variable gas restrictor are merged in a mixing section and guided to the burner, and the upstream pressure of the variable gas restrictor and the variable air It is equipped with differential pressure detection means for detecting a difference between the upstream pressure of the throttle and an air volume adjustment means for controlling the blower, and the gas volume adjustment means is controlled according to the load, while the load is set to a predetermined value. A gas combustion control device comprising an electric control unit that controls the variable gas throttle and the variable air throttle to a predetermined throttle in a region below a value.
れるよう構成した特許請求の範囲第１で記載のガス燃焼
制御装置。(2) The gas combustion control device according to claim 1, wherein the variable gas throttle and the variable air throttle are configured to be continuously controlled.
れるよう構成した特許請求の範囲第１項記載のガス燃焼
制御装置。(3) The gas combustion control device according to claim 1, wherein the variable gas throttle and the variable air throttle are configured to be controlled in stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58199382A JPS6091132A (en) | 1983-10-25 | 1983-10-25 | Controller of gas combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58199382A JPS6091132A (en) | 1983-10-25 | 1983-10-25 | Controller of gas combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6091132A true JPS6091132A (en) | 1985-05-22 |
Family
ID=16406832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58199382A Pending JPS6091132A (en) | 1983-10-25 | 1983-10-25 | Controller of gas combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6091132A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152186A (en) * | 2016-08-11 | 2016-11-23 | 珠海格力电器股份有限公司 | Nozzle arrangements, gas-cooker and combustion gas and AIR Proportional control method |
-
1983
- 1983-10-25 JP JP58199382A patent/JPS6091132A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152186A (en) * | 2016-08-11 | 2016-11-23 | 珠海格力电器股份有限公司 | Nozzle arrangements, gas-cooker and combustion gas and AIR Proportional control method |
| CN106152186B (en) * | 2016-08-11 | 2018-11-30 | 珠海格力电器股份有限公司 | Nozzle arrangements, gas-cooker and combustion gas and AIR Proportional adjusting method |
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