JPS58106322A - Combustion controller - Google Patents

Combustion controller

Info

Publication number
JPS58106322A
JPS58106322A JP56205663A JP20566381A JPS58106322A JP S58106322 A JPS58106322 A JP S58106322A JP 56205663 A JP56205663 A JP 56205663A JP 20566381 A JP20566381 A JP 20566381A JP S58106322 A JPS58106322 A JP S58106322A
Authority
JP
Japan
Prior art keywords
circuit
fan motor
deviation
combustion
output
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
Application number
JP56205663A
Other languages
Japanese (ja)
Inventor
Toru Shimomura
徹 下村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP56205663A priority Critical patent/JPS58106322A/en
Publication of JPS58106322A publication Critical patent/JPS58106322A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/082—Regulating fuel supply conjointly with another medium, e.g. boiler water using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/36—PID signal processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • 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)
  • Control Of Combustion (AREA)

Abstract

PURPOSE:To improve the combustion efficiency of a combustion controller by controlling a fuel flow rate control valve in response to the deviation between a target temperature and the detected temperature and stepwisely varying the rotating speed of a fan motor in accordance with the magnitude of the deviation. CONSTITUTION:In a hot water supplying device, when a cock is opened to detect the water stream by a flow switch 10, a combustion sequence control circuit 15 is started, thereby rotating a fan motor 12. When wind pressure is then detected by a wind pressure detector 13, a solenoid changeover valve 3 is opened. Simultaneously, the deviation between the outputs of a water temperature sensor 11 and a target temperature setter 17 is obtained by a deviation detecting circuit 18, a flow rate control valve 5 is controlled through a PID arithmetic circuit 19 in accordance with the deviation, and a burner 2 is ignited and burnt. In this state, the output of the circuit 19 is inputted to a fan motor speed control circuit 22, the output of the circuit 19 is discriminated at the level in a plurality of steps, thereby operating a switching element 21 and stepwisely varying the rotating speed of the motor 12.

Description

【発明の詳細な説明】 この発明は湯沸器等の燃焼機器の燃焼制御装置の改良に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in combustion control devices for combustion equipment such as water heaters.

近年、湯沸器として、熱交換器からの出Ｓ温度を検出す
るとともに、任意に設定される目ｓｕｍｓとの偏差から
所定の制御量をＰＩＤ演棹を行なって求め、この制御量
に従って燃料供給路に設けられた流量制御弁の弁開度を
調整し、バーナでの燃焼状態を低出渇量では低燃焼に、
高山ｍｍでは高燃焼になるように制御することにより、
使用湯温や水温変化に関係なくｓ瀉を目標温度に保持す
るよう動作する燃焼制御装置を備えたものが出現してい
る。In recent years, water heaters have been used to detect the output S temperature from the heat exchanger, perform PID calculation to determine a predetermined control amount from the deviation from the arbitrarily set sums, and supply fuel according to this control amount. By adjusting the valve opening of the flow control valve installed in the passageway, the combustion state in the burner is set to low combustion at low output and dryness.
By controlling the combustion rate to be high at high altitudes,
Some devices have appeared that are equipped with a combustion control device that operates to maintain the s-tub at a target temperature regardless of the temperature of the hot water used or changes in water temperature.

このように、この種の湯沸器は、検出Ｉ！麿が設定温度
と一致するようにフィードバック制御が行なわれるから
、従来広く用いられている燃焼状態が一定か段階的にし
か切換えられない湯沸器とは異なり、水温や出楊曇の変
化に拘わらず常に希望する温度の瀾が得られるという大
きな効果があり、省エネルギーを指向したものである。In this way, this type of water heater can detect I! Feedback control is performed so that the water temperature matches the set temperature, so unlike water heaters that have been widely used in the past, where the combustion state can only be changed at a constant level or in stages, the combustion state can be changed regardless of changes in water temperature or temperature. It has the great effect of always being able to obtain the desired temperature, and is oriented towards energy conservation.

ところが、従来の燃焼制御装置においては、上記偏差に
基づいて制御しているのはバーナへの燃料供給量のみで
あって、燃焼空気の供給に関してはバーナでの燃焼状態
に拘わらず常に一定量の燃焼空気をファンモータによっ
て供給するようにしているから、燃焼空気の供給量に過
不足が生じ燃焼効率を歴クシており、省エネルギーを指
向してＰＩＤ制御を導入した意義が損われている。However, in conventional combustion control devices, only the amount of fuel supplied to the burner is controlled based on the above deviation, and the supply of combustion air is always a constant amount regardless of the combustion state in the burner. Since combustion air is supplied by a fan motor, there is an excess or deficiency in the amount of combustion air supplied, resulting in poor combustion efficiency, which undermines the significance of introducing PID control with the aim of saving energy.

そこで、空燃比の整合を図り燃焼効率を改善するにはフ
ァンモータの回転速度をも上記制御量、つまりＰＩＤｌ
ｉｌ算回路の出力信号でもって制御してやれば良く、そ
のためにはファンモータの回転速度を段階的に切換える
切換手段と、ＰＩＤ演算回路の出力レベルに応じて切換
手段に切換信号を出力する制御手段とを設けることが考
えられる。Therefore, in order to match the air-fuel ratio and improve combustion efficiency, the rotation speed of the fan motor must be controlled by the above-mentioned control amount, that is, PIDl.
It is sufficient to perform control using the output signal of the il calculating circuit, and for this purpose, a switching means for changing the rotational speed of the fan motor stepwise, and a control means for outputting a switching signal to the switching means according to the output level of the PID calculating circuit are required. It is conceivable to provide a

周知のように、ＰｒＤ演算回路は第１図（ａ　）に示す
ｌｉ差信号のステップ入力に対し、第１図（ｂ）に示す
ように偏差に比例した信号（Ａ）、偏差を積分した信号
（Ｂ）及び偏差の変化速度を微分した信号（Ｃ）を合成
した信号（Ｄ＞を出力する。従って、このような構成を
採用する場合に問題となるのはＰＩＤ演舞回路の出力信
号に微分信号が含まれていることである。つまり、上記
制御手段はＰＩＤ演算回路の出力信号のレベルに応じて
切換信号を作成するから、当然にこの微分信号にも応答
して切換信号が出力される。ところが、）７ンモータに
は慣性があるから、この微分信号に応答する切換信号は
単に切換手段の接肖を開閉させるだけであり、このとき
の切換信号は接点寿命を浪費させる結果になる。このこ
とは燃焼制御装置自体の寿命や信頼性に悪影響を与える
ことが想定される。As is well known, in response to the step input of the li difference signal shown in FIG. 1(a), the PrD calculation circuit generates a signal (A) proportional to the deviation and a signal integrated with the deviation, as shown in FIG. 1(b). (B) and a signal (C) obtained by differentiating the speed of change of the deviation are combined to output a signal (D>. Therefore, when adopting such a configuration, the problem is that the output signal of the PID performance circuit is differentiated. In other words, since the control means creates a switching signal according to the level of the output signal of the PID calculation circuit, the switching signal is naturally output in response to this differential signal as well. However, since the motor has inertia, the switching signal responsive to this differential signal simply opens and closes the contact of the switching means, and the switching signal at this time results in wasting the life of the contact. This is expected to have an adverse effect on the lifespan and reliability of the combustion control device itself.

この発明はこのような問題点に着目されたもので、その
目的とするところは、燃焼制御装置自体の寿命や信頼性
に悪影響を与えることなくファンモータの回転速度を燃
焼状態に応じて可変できる燃焼制御装置を提供すること
である。This invention was developed in light of these problems, and its purpose is to make it possible to vary the rotational speed of the fan motor according to the combustion state without adversely affecting the lifespan or reliability of the combustion control device itself. An object of the present invention is to provide a combustion control device.

この発明は上記目的を達成するため、バーナへの燃料供
給量を調整する流量制御弁の弁開度を変更させる制御量
を目標温度信号と検出温度信号との偏差に応じて出力す
るＰＩＤ演粋回路と、バーナに燃焼空気を供給するファ
ンモータの回転速度を段階的に切換えるスイッチング素
子と、上記ＰＴＤ演篩回路の出力を複数段階にレベル弁
別し、その弁別出力でもって上記スイッチング素子を動
作させ上記ファンモータの回転速度を段階的に変化させ
るファンモータ速度制御回路とを備える燃ｆｉ　Ｉｌｌ
　ＩＩＩ装置であって、上記ファンモータ速度制御回路
は、上記ＰＩＤ演算回路の出力の高速変化成分に応答し
ないようにする遅延回路を有することを特徴とする。In order to achieve the above object, the present invention provides a PID algorithm that outputs a control amount for changing the valve opening of a flow rate control valve that adjusts the amount of fuel supplied to a burner in accordance with the deviation between a target temperature signal and a detected temperature signal. A circuit, a switching element for stepwise switching the rotational speed of a fan motor that supplies combustion air to the burner, and a plurality of levels of the output of the PTD sieve circuit, and the switching element is operated by the discriminated output. and a fan motor speed control circuit that changes the rotational speed of the fan motor in steps.
III device, characterized in that the fan motor speed control circuit includes a delay circuit that prevents the fan motor speed control circuit from responding to a high-speed change component of the output of the PID calculation circuit.

以下、この発明の実施例を添付図面に基づいて詳細に説
明する。Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

第１図はこの発明に係る燃焼制御装置を備えた湯沸器の
基本構成を示す図である。FIG. 1 is a diagram showing the basic configuration of a water heater equipped with a combustion control device according to the present invention.

同図において、湯沸器の本体１内のバーナ２に至る燃料
供給経路には燃料の供給を入・切する電磁切換弁３．ガ
バナ４及び燃料流饋を調整する流量制御弁５が配設され
、バーナ２に関連して点火火花を発生する点火器６と、
点火動作によって正常に着火したかどうかを検出する炎
検出器７が設けられ、また正常な着火に至らなかった場
合等の異常時に警報を発する警報器８を備えている。そ
５− して、熱交換器９に至る水入口には熱交換器９内を通過
する水流を検出するフロースイッチ１０が、また出湯口
側には出１ｍ温度を検出するサーミスタ等の湿度センサ
１１がそれぞれ設けられている。In the figure, the fuel supply path leading to the burner 2 in the main body 1 of the water heater includes an electromagnetic switching valve 3 that turns on and off the supply of fuel. an igniter 6 that is provided with a governor 4 and a flow control valve 5 that adjusts the fuel flow, and that generates an ignition spark in conjunction with the burner 2;
A flame detector 7 is provided to detect whether the ignition is normally ignited by the ignition operation, and an alarm 8 is provided to issue an alarm in the event of an abnormality such as when normal ignition is not achieved. 5- Then, a flow switch 10 is installed at the water inlet leading to the heat exchanger 9 to detect the water flow passing through the heat exchanger 9, and a humidity sensor such as a thermistor is installed at the outlet side to detect the temperature at the outlet 1m. 11 are provided respectively.

またへ本一体１の上部開口部にはファンモータ１２が設
けられ、このファンモータ１２の回転起動したことが風
圧スイッチ１３で検出される。Further, a fan motor 12 is provided at the upper opening of the main body 1, and a wind pressure switch 13 detects that the fan motor 12 has started to rotate.

また、この湯沸器の出Ｓ瀉麿が一定となるように制御す
る燃焼制御装置１１４は燃焼シーケンス制御回路１５と
Ｉｉ温制御回路１６でもって構成され、燃焼シーケンス
制御回路１５には電磁切換弁３゜点火器６．炎検出器７
．警報器８．フロースイッチ１０及び風圧スイッチ１３
等の各要素が接続されている。また、ｍ瀉制御曙路１７
には流量制御弁５．１度センサ１１及び温度設定器１６
等の各要素が接続され、そして上記ファンモータ１２は
燃焼シーケンス制御回路１５とｍ温制御回路１６にそれ
ぞれ接続されている。Further, a combustion control device 114 that controls the output S of the water heater to be constant is composed of a combustion sequence control circuit 15 and an Ii temperature control circuit 16, and the combustion sequence control circuit 15 includes an electromagnetic switching valve. 3° igniter 6. flame detector 7
．． Alarm 8. Flow switch 10 and wind pressure switch 13
Each element is connected. Also, m-control Akebono 17
Flow control valve 5.1 degree sensor 11 and temperature setting device 16
The fan motor 12 is connected to a combustion sequence control circuit 15 and a temperature control circuit 16, respectively.

この湯温制御回路１６は温度センサ１１による検出温度
信号と目４１！瀉ｒｌＩ設定器１７による目標温６− 噴とから偏差信号を発生する偏差検出回路１８とこの偏
差信号に基づき所定の制御量を出力するＰＩＤＩＤ囲枠
回路１９このＰＩＤ演棹回路１９の出力に応じて流量制
御弁５の弁開度を所定の開度に調整する弁駆動回路２０
と、上記ＰＩＤ演算回路１９の出力を複数段階にレベル
弁別し、ファンモータ１２の回転速度を切換えるスイッ
チング素子２１を動作ぎせ、ファンモータ１２の回転速
度を段階的に変化させるファンモータ速度制御回路２２
とで構成されている。This hot water temperature control circuit 16 is connected to the temperature signal detected by the temperature sensor 11 41! A deviation detection circuit 18 that generates a deviation signal from the target temperature 6- jet by the rlI setting device 17 and a PID ID frame circuit 19 that outputs a predetermined control amount based on this deviation signal according to the output of this PID calculation circuit 19. a valve drive circuit 20 that adjusts the valve opening degree of the flow control valve 5 to a predetermined opening degree;
and a fan motor speed control circuit 22 that differentiates the output of the PID calculation circuit 19 into multiple levels and operates a switching element 21 that changes the rotation speed of the fan motor 12 to change the rotation speed of the fan motor 12 in stages.
It is made up of.

次に第３図及び第４図は上記ｍ温制御回路のうちファン
モータ速度制御回路２２を中心にその具体例を示す図で
ある。Next, FIGS. 3 and 4 are diagrams showing specific examples of the fan motor speed control circuit 22 of the m temperature control circuit.

同図において、ファンモータ速度制御回路２２はＰｒＤ
演算回路１９の出力ｖｏを基準電圧Ｖ１のレベルで２値
化するコンパレータ３ｏと、このコンパレータ３０の出
力ｖ２を抵抗Ｒとコンデン：：’：’：”’：” すＣで定まる時定数で積分する積分回路と定電圧ダイオ
ード３１よりなる遅延回路３２と、遅延回路３２の出力
によってオン・オフ駆動されるトランジスタ３３とから
なり、ファンモータ１２の回転速度はスイッチング素子
としてのリレー２１がオン・オフすることで図示しない
接点を切換えて、低速回転と高速回転の２段階に切換え
られる。In the figure, the fan motor speed control circuit 22 is PrD
A comparator 3o binarizes the output vo of the arithmetic circuit 19 at the level of the reference voltage V1, and the output v2 of this comparator 30 is integrated with a time constant determined by a resistor R and a capacitor C. The rotation speed of the fan motor 12 is controlled by a relay 21 as a switching element. By doing so, by switching contacts (not shown), it is possible to switch between two stages of low-speed rotation and high-speed rotation.

次に、このように構成された燃焼制御装置を備えた湯沸
器の動作を説明する。今、蛇口が開かれて水流がフロー
スイッチ１ｏで検出されると、これによって燃焼シーケ
ンス制御回路１５が起動され、ファンモータ１２が回転
を始める。このファンモータ１２の回転による風圧が風
圧スイッチ１３で検出されると、燃焼シーケンス制御回
路１５は電磁切換弁３を開く。同時に温度センサ１１で
検出された水温と目標温度設定器１７による目標濃度と
の偏差が偏差検出回路１７で求められ、ＰＩＤ演算回路
１９に出力される。これによってＰＩＤ演算回路１９は
所定の制御量を弁駆動回路２０を介して流量制御弁５に
出力し、流量制御弁５の弁開度が適宜な開度に調整され
てバーナ２に所定流量の燃料が供給されるから、燃焼シ
ーケンス制御回路１５は点火器６を動作させて点火火花
を発生させる。これによりバーナ２が正常に着火し、燃
焼が開始すると炎検出器７によってこれが検出され、着
火ミスがあると警報器８が駆動される。Next, the operation of the water heater equipped with the combustion control device configured as described above will be explained. Now, when the faucet is opened and water flow is detected by the flow switch 1o, the combustion sequence control circuit 15 is activated and the fan motor 12 starts rotating. When the wind pressure caused by the rotation of the fan motor 12 is detected by the wind pressure switch 13, the combustion sequence control circuit 15 opens the electromagnetic switching valve 3. At the same time, the deviation between the water temperature detected by the temperature sensor 11 and the target concentration determined by the target temperature setter 17 is determined by the deviation detection circuit 17 and output to the PID calculation circuit 19. As a result, the PID calculation circuit 19 outputs a predetermined control amount to the flow rate control valve 5 via the valve drive circuit 20, and the valve opening degree of the flow rate control valve 5 is adjusted to an appropriate opening degree, so that the burner 2 receives a predetermined flow rate. Since fuel is supplied, the combustion sequence control circuit 15 operates the igniter 6 to generate an ignition spark. As a result, the burner 2 is normally ignited, and when combustion starts, this is detected by the flame detector 7, and if there is an ignition error, the alarm 8 is activated.

バーナ２が正常に着火し、正常燃焼状態となるに伴い、
熱交換器９における熱交換が進行し、蛇口から潟が出湯
されるが、このＷａＳは温度センサ１１で検出され、こ
れと目標温度と偏差が再び偏差検出回路１８で求められ
る。この新しく求められた偏差に基づきＰＩＤ演棹回路
１９は偏差を小さくすべく所定の１ｌＪＩＩｌ量を弁駆
動回路２０を介して流量制御弁５に出力し、流量制御弁
５の弁開度が調整される。As burner 2 ignites normally and enters a normal combustion state,
Heat exchange in the heat exchanger 9 progresses, and hot water is dispensed from the faucet. This WaS is detected by the temperature sensor 11, and the deviation from this and the target temperature is again determined by the deviation detection circuit 18. Based on this newly determined deviation, the PID calculation circuit 19 outputs a predetermined amount of 1lJIIl to the flow rate control valve 5 via the valve drive circuit 20 in order to reduce the deviation, and the valve opening degree of the flow rate control valve 5 is adjusted. Ru.

ここで、例えばＳ沸器が当初抵出湯量で使用されており
、時刻ＴＯで高出湯量の使用状態に変更された場合には
１ｉａｉはまず温度降下を呈し、次いで目標Ｉ！度に向
かって上押するがこの過渡状態におけるＰＩＤ演算回路
１９の出力は第４図（ａ）に示すようになる。Here, for example, if the S boiler is initially used with a low hot water output and is changed to a high hot water output at time TO, 1iai will first exhibit a temperature drop, and then the target I! The output of the PID calculation circuit 19 in this transient state is as shown in FIG. 4(a).

すなわち、一時的なｍ温の隣下が偏差検出回路１８で検
出されると、ＰＩＤ演算回路１９はこの９− Ｉｉ澗の降下速度の変化率を求め、立ち上がりが急峻な
微分波形の出力をし、バーナの燃焼状態を増大させてＳ
温と目標温度との偏差が急激に縮まるように動作する。That is, when the deviation detection circuit 18 detects a temperature immediately below the temporary m temperature, the PID calculation circuit 19 calculates the rate of change in the rate of fall of this 9-Ii, and outputs a differential waveform with a steep rise. , by increasing the combustion state of the burner
It operates so that the deviation between the temperature and the target temperature is rapidly reduced.

ｍ渇が上昇し温度偏差が定常値になると、ＰＩＤ演算回
路１９は比例積分動作を行なうから、出力ｖＯは緩やか
な上昇曲線となり、バーナの燃焼状態は所定の高燃焼状
態になる。When the exhaust temperature increases and the temperature deviation reaches a steady value, the PID calculation circuit 19 performs a proportional-integral operation, so that the output vO follows a gradual upward curve and the burner combustion state becomes a predetermined high combustion state.

このような出力ＶＯがコンパレータ３０に入力されると
、周知のようにｖＯとＶｌとの大小関係が比較され、Ｈ
レベルと１．レベルに２１１１化される（第４図（ｂ）
）。このとき、微分信号出力部分ａｂでは短詩ＩＩＬレ
ベルに反転し、比例積分信号部分に移行する峙閤帯ｂｅ
で再びＨレベルになり、０点以後ではしレベルになって
安定している。そして、遅延回路３２はコンパレータ３
０の出力の立ち上り、立ち下がりをそれぞれ所定時間遅
延させるもので、コンパレータ３０の出力波形のうち時
１Ｗｌ（ｂ　−ａ　）が遅延回路３２の遅延時ｍ以下の
場合、そのａｂｌｌｌのレベル信号は遅延回路３２の出
力に現れない。従って、トランジスタ３３は、第４１０
− 図＜ａ　＞に示すようにａｂ間もオシ状態を雑持し、０
点を通過した所定の遅延時間（Ｔ）後のｄ点でトランジ
スタ３３はオフする。つまり、リレー２１は前述した不
要な切換え動作をさせられることなく、ｄ点まではオン
されてファンモータは低速回転になっており、ｄ点以後
はオフされてファンモータが＾速回転に切り替わるから
、ｄ点以後の燃焼状態は空燃比が改善されたものとなる
。When such an output VO is input to the comparator 30, as is well known, the magnitude relationship between vO and Vl is compared, and H
Level and 1. Level 2111 (Figure 4(b)
). At this time, the differential signal output part ab is inverted to the short poem IIL level, and the output part ab shifts to the proportional integral signal part.
Then it becomes H level again, and after 0 points it becomes H level and stable. The delay circuit 32 is connected to the comparator 3.
The rise and fall of the 0 output are delayed by a predetermined time, respectively, and if the time 1Wl (b - a ) of the output waveform of the comparator 30 is less than or equal to the delay time m of the delay circuit 32, the level signal of that ablll is delayed. It does not appear at the output of circuit 32. Therefore, the transistor 33
- As shown in figure <a>, there are mixed states between a and b, and 0
The transistor 33 is turned off at point d after a predetermined delay time (T) after passing through the point. In other words, the relay 21 is not caused to perform the above-mentioned unnecessary switching operation, and is turned on up to point d, causing the fan motor to rotate at low speed, and after point d, it is turned off, and the fan motor switches to speed rotation. , the combustion state after point d is one in which the air-fuel ratio is improved.

以上は低燃焼状態から高燃焼状態になった場合の説明で
あるが、逆の場合にも同様であり、また一定の燃焼状態
で湯沸器が使用されていて何等かの原因でＩ２！が一時
的に変化してＰＩＤ演棹回路１９から微分信号が出力さ
れても、上記遅延回路３２の作用によって、トランジス
タ３３は動作しないからファンモータ２１は回転速度が
切換えられるようなことはない。The above is an explanation of the case where the combustion state changes from a low combustion state to a high combustion state, but the same applies to the reverse case.Also, if the water heater is used in a certain combustion state and for some reason I2! Even if the differential signal is output from the PID calculation circuit 19 due to a temporary change in the differential signal, the transistor 33 does not operate due to the action of the delay circuit 32, so the rotation speed of the fan motor 21 will not be changed.

その結果、リレー２１の接点が不要な動作をさせられる
ことはないから、その寿命が徒に浪費されることはない
。As a result, the contacts of the relay 21 are not forced to operate unnecessarily, so that their lifespan is not wasted.

以上詳細に説明したように、この発明によれ（ｆ１１− ３２・・・・・・遅延回路 簡単な構成でもって燃焼制御＠置の寿命や信頼性を損う
ことなく燃焼状態に整合する燃焼空気が供給できるから
、燃焼効率を大幅に改善できる燃焼制御装置を提供する
ことができる。As explained in detail above, according to the present invention (f11-32), the simple configuration of the delay circuit allows the combustion air to match the combustion state without impairing the service life or reliability of the combustion control unit. , it is possible to provide a combustion control device that can significantly improve combustion efficiency.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は偏差信号とＰＩＤ演棹波形を示す概略図、第２
図はこの発明に係る燃焼制御装置を備えた湯沸器の基本
構成図、第３図及び第４図は燃焼制御装置の具体例を示
す概略構成図及び動作説明図である。 ２・・・・・・バーナ ５・・・・・・流饅制御弁 １１・・・・・・温度センサ １２・・・・・・ファンモータ １４・・・・・・燃焼制御装置 １７・・・・・・目ｌ！温麿設定器 １９・・・・・・ＰＩＤ演算回路 ２１・・・・・・スイッチング素子（リレー）２２・・
・・・・ファンモータ速度制御回路３０・・・・・・コ
ンパレータ １２− 特許出願人 立石電機株式会社 １３− 第１図 １％Ｊ （ｂ 第２図 １２ 小〜１７ 第３図 り２Figure 1 is a schematic diagram showing the deviation signal and PID derivation waveform, Figure 2
The figure is a basic configuration diagram of a water heater equipped with a combustion control device according to the present invention, and FIGS. 3 and 4 are schematic configuration diagrams and operation explanatory diagrams showing specific examples of the combustion control device. 2...Burner 5...Flow control valve 11...Temperature sensor 12...Fan motor 14...Combustion control device 17... ...eyes! Onmaro setting device 19... PID calculation circuit 21... Switching element (relay) 22...
...Fan motor speed control circuit 30...Comparator 12- Patent applicant Tateishi Electric Co., Ltd. 13- Fig. 1 1% J (b Fig. 2 12 Small to 17 3rd drawing 2

Claims (1)

【特許請求の範囲】[Claims] （１）バーナへの燃料供給−を調整する流量制御弁の弁
開度を変更させる制御層を目標温度信号と検出ｍ度信号
との偏差に応じて出力するＰＴＤ演算回路と、バーナに
燃焼空気を供給するファンモータの回転速度を段階的に
切換えるスイッチング素子と、上記ＰＩＤ演算回路の出
力を複数段階にレベル弁別し、その弁別出力でもって上
記スイッチング素子を動作させ上記ファンモータの回転
速度を段階的に変化させるファンモータ速度制御回路と
を拳える燃焼制御装置であって、上記ファンモータ速制
御部回、路は、上記ＰＩＤ演算回路の出力の＾速変化成
分に応答しないようにする遅延回路を有することを特徴
とする燃焼制御装置。(1) A PTD calculation circuit that outputs a control layer that changes the valve opening of a flow control valve that adjusts the fuel supply to the burner according to the deviation between the target temperature signal and the detected m degree signal, and a PTD calculation circuit that outputs a control layer that changes the valve opening of the flow control valve that adjusts the fuel supply to the burner, a switching element that changes the rotational speed of the fan motor in stages, and a switching element that discriminates the output of the PID calculation circuit into multiple levels, and operates the switching element with the discriminated output to gradually change the rotational speed of the fan motor. A combustion control device that controls a fan motor speed control circuit that changes the speed of the fan motor, the fan motor speed control circuit including a delay circuit that prevents the fan motor speed control circuit from responding to the speed change component of the output of the PID calculation circuit. A combustion control device characterized by having:
JP56205663A 1981-12-18 1981-12-18 Combustion controller Pending JPS58106322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56205663A JPS58106322A (en) 1981-12-18 1981-12-18 Combustion controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56205663A JPS58106322A (en) 1981-12-18 1981-12-18 Combustion controller

Publications (1)

Publication Number Publication Date
JPS58106322A true JPS58106322A (en) 1983-06-24

Family

ID=16510621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56205663A Pending JPS58106322A (en) 1981-12-18 1981-12-18 Combustion controller

Country Status (1)

Country Link
JP (1) JPS58106322A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5112217A (en) * 1990-08-20 1992-05-12 Carrier Corporation Method and apparatus for controlling fuel-to-air ratio of the combustible gas supply of a radiant burner
KR100406472B1 (en) * 2001-10-31 2003-11-19 주식회사 경동보일러 Air proportionality type boiler using air pressure sensor
KR100581463B1 (en) 2005-01-28 2006-05-22 주식회사 경동네트웍 Modulating control system and control method of oil boiler
KR100704712B1 (en) 2005-09-22 2007-04-09 주식회사 경동나비엔 Multi air proportionality type gas boiler
CN105674570A (en) * 2014-11-19 2016-06-15 天津佳成宝自动化科技有限公司 Fuzzy proportion integration differentiation (PID) type energy-saving control system for bionic boiler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5112217A (en) * 1990-08-20 1992-05-12 Carrier Corporation Method and apparatus for controlling fuel-to-air ratio of the combustible gas supply of a radiant burner
KR100406472B1 (en) * 2001-10-31 2003-11-19 주식회사 경동보일러 Air proportionality type boiler using air pressure sensor
KR100581463B1 (en) 2005-01-28 2006-05-22 주식회사 경동네트웍 Modulating control system and control method of oil boiler
KR100704712B1 (en) 2005-09-22 2007-04-09 주식회사 경동나비엔 Multi air proportionality type gas boiler
CN105674570A (en) * 2014-11-19 2016-06-15 天津佳成宝自动化科技有限公司 Fuzzy proportion integration differentiation (PID) type energy-saving control system for bionic boiler

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