JPH06221553A - Combustion control method of combustor - Google Patents

Combustion control method of combustor

Info

Publication number
JPH06221553A
JPH06221553A JP3278593A JP3278593A JPH06221553A JP H06221553 A JPH06221553 A JP H06221553A JP 3278593 A JP3278593 A JP 3278593A JP 3278593 A JP3278593 A JP 3278593A JP H06221553 A JPH06221553 A JP H06221553A
Authority
JP
Japan
Prior art keywords
combustion
amount
wind pressure
air flow
flow rate
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
Application number
JP3278593A
Other languages
Japanese (ja)
Other versions
JP3139196B2 (en
Inventor
Yoshihiko Tanaka
良彦 田中
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.)
Noritz Corp
Original Assignee
Noritz Corp
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 Noritz Corp filed Critical Noritz Corp
Priority to JP05032785A priority Critical patent/JP3139196B2/en
Publication of JPH06221553A publication Critical patent/JPH06221553A/en
Application granted granted Critical
Publication of JP3139196B2 publication Critical patent/JP3139196B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/18Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N2005/181Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
    • F23N2005/182Air flow switch

Landscapes

  • Regulation And Control Of Combustion (AREA)

Abstract

PURPOSE:To provide a combustion control method of a combustor which can develop a better air pressure resisting performance without changing a heating value of combustion unstably from a value set even when an air pressure switch is turned ON or OFF frequently because of unstableness of external air pressure. CONSTITUTION:An air pressure switch 8 is provided near an exhaust port 7 and when an air pressure switch 8 detects an air pressure exceeding a fixed value, it is judged whether the current amount of air blown exceeds a preset value or not. When the amount does not exceeds the value, the amount of the air to be blown is increased to the fixed value while the amount of fuel to be supplied is adjusted to a proper value with respect to the fixed amount of air blown. Then, an air pressure resisting operation is performed by an ON-OFF control combustion and the operation is continued until the burning operation ends regardless of the subsequent state of the air pressure switch 8 as long as the setting of the heating value of combustion is changed to a value corresponding to the amount of the air blown exceeding the fixed amount thereof.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は燃焼器の燃焼制御方法に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control method for a combustor.

【0002】[0002]

【従来の技術】例えば送風ファンの回転数を制御する強
制排気型の石油比例制御給湯器等においては、外部から
の風に対する耐風圧機能が要求されている。このため、
従来は排気口付近に風圧スイッチを設けて、該風圧スイ
ッチが一定以上の風圧を受けてオンすると、給湯号数
(号数としての1号は1リットルの水を1分間に25℃上
昇させる燃焼熱量である)を、燃焼ケース内へ空気を送
る送風ファンの回転数が一定以上の回転数(即ち一定以
上の送風量)となる給湯号数に自動的に上げ、且つ燃焼
制御を、設定号数に応じて燃焼量をリニアに制御する比
例制御燃焼から、オンオフ制御燃焼に変更して、該号数
で所定の設定温度が出湯するようにオンオフ制御燃焼運
転するようにしていた。そして前記風圧スイッチがオフ
になると再びもとの比例制御燃焼に復帰させる方法を採
用していた。
2. Description of the Related Art For example, a forced exhaust type oil proportional control water heater for controlling the rotation speed of a blower fan is required to have a wind pressure resistance function against wind from the outside. For this reason,
Conventionally, a wind pressure switch is provided near the exhaust port, and when the wind pressure switch receives a wind pressure of a certain level or more and turns on, the hot water supply number (1 as the number is 1 liter of water raised by 25 ° C per minute (The amount of heat) is automatically increased to a hot water supply number at which the number of rotations of the blower fan that sends air into the combustion case becomes a certain number of rotations (that is, a certain amount of blown air), and the combustion control is set to the set number. The proportional control combustion in which the combustion amount is linearly controlled according to the number is changed to the on / off control combustion, and the on / off control combustion operation is performed so that a predetermined set temperature is discharged at the number. Then, when the air pressure switch is turned off, the original proportional control combustion is restored again.

【0003】[0003]

【発明が解決しようとする課題】ところが、上記従来の
装置では、外部からの風圧が不安定な場合には、頻繁に
風圧スイッチがオン、オフすることから、その都度、燃
焼運転の号数が変更され、また比例制御燃焼とオンオフ
制御燃焼との変更が行われることから、安定した燃焼熱
量を出力することが難しくなり、その結果、出湯温度が
不安定となり、また正確な設定温度の温水をかえって得
難いという問題があった。前記した問題は、オンオフ制
御燃焼による給湯器の場合でも同様である。即ち、オン
オフ燃焼の号数が通常時の号数と耐風圧運転を行う場合
の号数とで頻繁に変更されることになるので、所定の燃
焼熱量を安定して得ることが困難となり、よって出湯温
度制御も不十分となって、出湯温度が不安定となり、ま
た正確な設定温度の温水を安定して得ることが難しくな
るのである。
However, in the above-mentioned conventional device, when the wind pressure from the outside is unstable, the wind pressure switch is frequently turned on and off, so that the number of combustion operation is changed each time. Since it is changed and proportional control combustion and on-off control combustion are changed, it becomes difficult to output a stable combustion heat quantity, and as a result, the hot water temperature becomes unstable and hot water with an accurate set temperature is not generated. On the contrary, there was a problem that it was difficult to obtain. The above-mentioned problem is the same in the case of a water heater using on-off controlled combustion. That is, since the number of on-off combustion is frequently changed between the number of normal times and the number of times when wind pressure resistant operation is performed, it becomes difficult to stably obtain a predetermined combustion heat amount. The hot water temperature control becomes insufficient, the hot water temperature becomes unstable, and it becomes difficult to stably obtain hot water at an accurate set temperature.

【0004】そこで、本発明は上記従来技術の欠点を解
消し、外部からの風圧が不安定で、頻繁に風圧スイッチ
がオンオフする場合でも、燃焼熱量を設定された値から
不安定に変動させることなく、良好な耐風圧性能を発揮
させることができる燃焼器の燃焼制御方法の提供を目的
とする。
Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and makes the combustion heat quantity unstable from the set value even when the wind pressure from the outside is unstable and the wind pressure switch is frequently turned on and off. It is an object of the present invention to provide a combustion control method for a combustor that can exhibit good wind pressure resistance.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するた
め、本発明の燃焼器の燃焼制御方法は、燃焼ケース内に
供給された流体燃料を同じく燃焼ケース内に送風された
燃焼用空気で燃焼させ、発生する排気ガスを排気口から
強制排気することで、所定の燃焼熱量を得るように比例
制御燃焼若しくはオンオフ制御燃焼を通常時において行
う燃焼器であって、排気口付近に風圧スイッチを設け、
該風圧スイッチが一定以上の風圧を検出した場合には、
現行の送風量が予め定めた一定送風量以上の送風量か否
かを判定して、未満の場合には送風量を前記一定送風量
まで増加させると共に燃料供給量を前記一定送風量に対
する適正な燃料供給量に調整して、オンオフ制御燃焼に
よる耐風圧運転を行い、且つ燃焼熱量の設定が前記一定
送風量以上の送風量となる値に設定変更されない限り、
その後の風圧スイッチの如何に係わらず、その運転が終
了するまでは前記耐風圧運転を継続するようにしたこと
を特徴としている。
In order to achieve the above object, in the combustion control method for a combustor according to the present invention, the fluid fuel supplied into the combustion case is burned with the combustion air blown into the combustion case. A combustor that performs proportional control combustion or on-off control combustion in a normal time so as to obtain a predetermined combustion heat amount by forcibly exhausting the generated exhaust gas from the exhaust port, and a wind pressure switch is provided near the exhaust port. ,
When the wind pressure switch detects a wind pressure above a certain level,
It is determined whether or not the current air flow rate is equal to or more than a predetermined fixed air flow rate, and if it is less than the predetermined air flow rate, the air flow rate is increased to the constant air flow rate, and the fuel supply amount is set to an appropriate amount for the constant air flow rate. Adjusting to the fuel supply amount, performing wind pressure resistant operation by on-off control combustion, and unless the setting of the combustion heat amount is changed to a value that is an air flow amount above the constant air flow amount,
It is characterized in that the wind pressure resistant operation is continued until the operation is completed, regardless of the subsequent air pressure switch.

【0006】[0006]

【作用】上記本発明の特徴によれば、燃焼運転中、風圧
スイッチがオンすると、現在行われている送風量が一定
の送風量以上であるか否かが先ず判断される。この場合
一定送風量とは、外部からの一定以上の風圧に対して安
定した燃焼が行える送風量で、予め実験によって決定し
ておく。そして、前記判定された現在の送風量が一定の
送風量未満の場合には、送風量が前記一定の送風量まで
増加せられる。と同時に、前記変更された後の送風量に
対して適正な燃料供給量となるように流体燃料も調整せ
られ、これまでの燃焼制御方法が比例制御燃焼であるか
オンオフ制御燃焼であるか否かにかかわらず、オンオフ
制御燃焼によって所定の燃焼熱量に調整せられる。そし
て一旦、送風量を増加したオンオフ燃焼による耐風圧運
転が開始されると、その後においては例え風圧スイッチ
がオフとなっても、その運転が終了するまでは耐風圧運
転がそのまま継続される。ただし、燃焼熱量の設定が前
記耐風圧性を有する一定送風量以上の送風量に対応する
燃焼熱量へ設定変更された場合には、元の通常の燃焼運
転に復帰せられる。この場合には通常の比例制御運転や
オンオフ制御運転によっても外部からの風圧に対して十
分安定した燃焼が確保され、しかも耐風圧運転の場合よ
りも正確な燃焼熱量を得ることができる。以上のように
作用することで、風圧スイッチが頻繁にオンオフする場
合においても、安定した燃焼による正確で変動の少ない
燃焼熱量を確実に得ることができる。
According to the above feature of the present invention, when the air pressure switch is turned on during the combustion operation, it is first judged whether or not the amount of air currently being blown is equal to or more than a certain amount. In this case, the constant air flow rate is an air flow rate that allows stable combustion with respect to a wind pressure from a certain level or more from the outside, and is determined in advance by experiments. Then, when the determined current air flow rate is less than the constant air flow rate, the air flow rate is increased to the constant air flow rate. At the same time, the fluid fuel is also adjusted so that the fuel supply amount is appropriate for the changed blast amount, and whether the combustion control method up to now is proportional control combustion or on-off control combustion. Regardless, the on / off control combustion adjusts the combustion heat to a predetermined value. Then, once the wind pressure resistant operation by the on-off combustion with the increased air flow rate is started, even if the wind pressure switch is turned off thereafter, the wind pressure resistant operation is continued until the operation is finished. However, when the setting of the combustion heat amount is changed to the combustion heat amount corresponding to the blown air amount having the wind pressure resistance or higher, the original normal combustion operation can be restored. In this case, even in the normal proportional control operation and on / off control operation, sufficiently stable combustion can be ensured against wind pressure from the outside, and more accurate combustion heat quantity can be obtained than in the wind pressure resistant operation. By operating as described above, even when the wind pressure switch is frequently turned on and off, it is possible to reliably obtain the accurate and small fluctuation heat of combustion due to stable combustion.

【0007】[0007]

【実施例】図1は本発明方法の実施例を示し、給湯器と
しての燃焼装置の構成図、図2は制御部による燃焼運転
の制御フローチャート、図3は給湯温度制御のタイムチ
ャート、図4は他の実施例による給湯温度制御のタイム
チャートである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the method of the present invention, which is a block diagram of a combustion apparatus as a water heater, FIG. 2 is a control flowchart of combustion operation by a control unit, FIG. 3 is a time chart of hot water temperature control, and FIG. 6 is a time chart of hot water supply temperature control according to another embodiment.

【0008】図1において、燃焼ケース1の下側部に液
体燃料噴霧ノズル2が内部に臨み、またそのノズル2の
周囲から送風ファン3による空気送風口が臨まされてい
る。また前記燃焼ケース1内上部には給湯用熱交換器4
が配置され、入水管5からの水が熱交換器4を通って加
熱され、出湯管6に出湯される。5aは水流スイッチであ
る。また6aは出湯温度センサである。前記燃焼ケース1
の天井部には燃焼排気ガスを強制排気するための排気口
7が設けられ、またその近傍に外部からの風圧を検出す
る風圧スイッチ8が設けられている。
In FIG. 1, a liquid fuel spray nozzle 2 faces the inside of the lower side of the combustion case 1, and an air blower port of a blower fan 3 faces the periphery of the nozzle 2. A heat exchanger 4 for hot water supply is provided in the upper part of the combustion case 1.
Is arranged, water from the water inlet pipe 5 is heated through the heat exchanger 4, and is discharged to the hot water outlet pipe 6. 5a is a water flow switch. Further, 6a is a tap water temperature sensor. The combustion case 1
An exhaust port 7 for forcibly exhausting the combustion exhaust gas is provided in the ceiling part of, and a wind pressure switch 8 for detecting the wind pressure from the outside is provided in the vicinity thereof.

【0009】前記液体燃料噴霧ノズル2は、リターン式
のノズルとして、液体燃料の供給路9とリターン路10と
が接続され、供給路9には2つの電磁ポンプ11、12が設
けられ、またその間に流量調整器13が設けられている。
一方、リターン路10には電磁開閉弁14が設けられてい
る。この様な構成により、ノズルはその噴霧量をリニア
に変更調整することができるものとなっている。前記送
風ファン3には回転数センサ15が設けられており、回転
数を自由に変更することができるようになされている。
16は制御部で、設定された出湯温度に対して必要燃焼量
を演算し、また前記水流スイッチ5a、出湯温度センサ6
a、風圧スイッチ8、送風ファン3の回転数センサ15等
からの情報を入力して、所定の動作命令を前記供給路9
の各ポンプ11、12、送風ファン3、流量調整器13、電磁
開閉弁14等に出力する。
The liquid fuel spray nozzle 2 is a return type nozzle in which a liquid fuel supply passage 9 and a return passage 10 are connected, and two electromagnetic pumps 11 and 12 are provided in the supply passage 9 and between them. Is provided with a flow rate adjuster 13.
On the other hand, the return passage 10 is provided with an electromagnetic opening / closing valve 14. With such a configuration, the nozzle is capable of linearly changing and adjusting the spray amount. The blower fan 3 is provided with a rotation speed sensor 15 so that the rotation speed can be freely changed.
Reference numeral 16 denotes a control unit, which calculates a required combustion amount with respect to the set hot water temperature, the water flow switch 5a, and the hot water temperature sensor 6
a, the wind pressure switch 8, the information from the rotation speed sensor 15 of the blower fan 3, etc. is input, and a predetermined operation command is given to the supply path 9
It outputs to each of the pumps 11 and 12, the blower fan 3, the flow rate controller 13, the electromagnetic opening / closing valve 14 and the like.

【0010】前記制御部16による燃焼制御は通常時は比
例制御燃焼とし、前記風圧スイッチ8がオンした場合の
一定の場合にはオンオフ制御燃焼として、所定の設定出
湯温度となるよう燃焼量を制御するようになされてい
る。即ち、図2のフローチャートと図3のタイムチャー
トを参照して、制御部16による燃焼制御を説明すると、
今、出湯管6末端の図示しない出湯カランが開放され、
入水管5の水量センサ5aがオンすると、先ず比例制御に
よる燃焼運転が開始される(S1)。この燃焼運転にお
いては、制御部16は設定された出湯温度と入水流量及び
入水温度とから必要な燃焼熱量(出湯号数)を演算し、
その燃焼熱量に対応する量の液体燃料を噴霧するよう
に、各ポンプ11、12、流量調節器13、電磁開閉弁14を調
節し、また液体燃料の噴霧供給量に対応した適切な送風
量となる送風ファン3の回転数調節する。またそして出
湯温度センサ6aからの出湯温度と設定出湯温度とを比較
して、その差に応じた噴霧量を比例制御することで液体
燃料の供給量をリニアに制御して、所定の出湯温度を得
る。同様に回転数センサ15による実際の回転数を入力す
ることで、液体燃料の噴霧供給量に適切に対応した送風
量となるファン回転数を制御する。この比例制御による
燃焼制御の場合には図3に示す比較的平滑な線からなる
出湯温度線を得る。
The combustion control by the control unit 16 is normally proportional control combustion, and on-off control combustion when the wind pressure switch 8 is on when it is constant, and the combustion amount is controlled to reach a predetermined set hot water temperature. It is designed to do. That is, the combustion control by the control unit 16 will be described with reference to the flowchart of FIG. 2 and the time chart of FIG.
Now, a hot water outlet (not shown) at the end of the hot water pipe 6 is opened,
When the water amount sensor 5a of the water inlet pipe 5 is turned on, combustion operation by proportional control is first started (S1). In this combustion operation, the control unit 16 calculates the required heat of combustion (the number of hot water) from the set hot water temperature, incoming water flow rate, and incoming water temperature,
In order to spray the liquid fuel in an amount corresponding to the combustion heat amount, each pump 11, 12, the flow rate controller 13, the electromagnetic on-off valve 14 is adjusted, and an appropriate air flow amount corresponding to the spray supply amount of the liquid fuel and Adjust the rotation speed of the blower fan 3. Further, the hot water temperature from the hot water temperature sensor 6a is compared with the set hot water temperature, and the amount of the liquid fuel is linearly controlled by proportionally controlling the spray amount according to the difference between the hot water temperature and the preset hot water temperature. obtain. Similarly, by inputting the actual rotation speed by the rotation speed sensor 15, the fan rotation speed that is a blown air amount appropriately corresponding to the spray supply amount of the liquid fuel is controlled. In the case of the combustion control by the proportional control, the tapping temperature line composed of a relatively smooth line shown in FIG. 3 is obtained.

【0011】そして運転中、制御部16は風圧スイッチ8
からの情報を入力し、風圧スイッチ8がオンか否かを判
定する(S2)。外部からの風圧が大である場合には風
圧スイッチ8がオンするので、オンの場合には更に送風
ファン3の回転数が一定回転数NS 以上あるか否かを判
定する(S3)。ここで一定回転数NS とは外部からの
一定以上の風圧に対して安定した燃焼が行える送風量に
対応するファン3の回転数であって、予め実験によって
決定しておくことができる。風圧スイッチ8がオフの場
合、及び風圧スイッチ8がオンの場合もファン3の回転
数が一定回転数NS 以上の場合には、比例制御による燃
焼運転を継続する。
During operation, the control unit 16 controls the wind pressure switch 8
Information is input to determine whether the wind pressure switch 8 is on (S2). When the wind pressure from the outside is large, the wind pressure switch 8 is turned on. Therefore, when it is turned on, it is further determined whether or not the rotation speed of the blower fan 3 is equal to or higher than a fixed rotation speed N S (S3). Here, the constant rotation speed N S is the rotation speed of the fan 3 corresponding to the amount of blown air that allows stable combustion with respect to the wind pressure from a certain level or more from the outside, and can be determined in advance by experiments. When the wind pressure switch 8 is off and when the wind pressure switch 8 is on and the rotation speed of the fan 3 is equal to or higher than the constant rotation speed N S , the combustion operation by the proportional control is continued.

【0012】一方、ファン3の回転数が一定回転数NS
未満の場合(S3でノーの場合)には、制御部16は燃焼
運転を比例制御運転からオンオフ制御燃焼による耐風圧
運転に変更する(S4)。即ち、風圧スイッチ8がオン
であるのに、ファン3の回転数が一定回転数NS 未満の
ままでは、外部からの風圧によって燃焼ケース1内部で
の燃焼が非常に不安定となり、またそれによって安定し
た所定の燃焼熱量及び設定出湯温度が得られなくなるの
で、外部からの風圧に対して十分安定した燃焼が行える
ように、ファン3の回転数を前記一定回転数NS まで増
加させると共に、その一定回転数NS による送風量に対
して丁度適正な燃料供給量となるように流体燃料の供給
量も調整して、外部風圧に対して安定させた燃焼を行
う。と同時に、燃焼運転のモードも、現行の比例制御運
転では出湯温度を設定出湯温度に調整できなくなるの
で、出湯温度を所定の設定出湯温度にするための手段と
して、オンオフ制御燃焼とする。この耐風圧運転では、
出湯温度が設定出湯温度を中心としてハンチングする特
性となる(図3参照)。
On the other hand, the rotation speed of the fan 3 is a constant rotation speed N S.
If it is less than (NO in S3), the control unit 16 changes the combustion operation from the proportional control operation to the wind pressure resistant operation by ON / OFF control combustion (S4). That is, even if the wind pressure switch 8 is on, if the rotation speed of the fan 3 remains less than the constant rotation speed N S , the combustion inside the combustion case 1 becomes extremely unstable due to the wind pressure from the outside. Since the stable predetermined combustion heat quantity and the set hot water temperature cannot be obtained, the rotation speed of the fan 3 is increased to the constant rotation speed N S so that the combustion is sufficiently stable against the wind pressure from the outside. The amount of fluid fuel supplied is also adjusted so that the amount of fuel supplied is just appropriate for the amount of air blown at a constant rotational speed N S, and combustion is performed that is stable against external wind pressure. At the same time, as for the combustion operation mode, the current outlet control temperature cannot be adjusted to the set outlet temperature in the proportional control operation, so on-off control combustion is used as a means for setting the outlet temperature to the predetermined outlet temperature. In this wind-resistant operation,
The tapping temperature has a characteristic of hunting around the set tapping temperature (see FIG. 3).

【0013】前記ファン3の回転数を前記一定回転数N
S に増大したオンオフ燃焼の耐風圧運転は、その後、設
定出湯温度が変更されない限り(S5でノー)、その運
転の終了まで、その後の風圧スイッチ8のオン、オフの
有無に係わらず継続される(S6)、また、設定出湯温
度が変更された場合(S5でイエス)でも、その変更に
よって、演算し直される送風ファン3の必要回転数が前
記一定回転数NS 以上とならない限り(S7でノー)、
その後における風圧スイッチ8のオン、オフの有無とは
関係なく、前記オンオフ燃焼の耐風圧運転がその運転の
終了まで継続される(S6)。
The rotation speed of the fan 3 is set to the constant rotation speed N.
The on-off combustion-resistant wind pressure operation increased to S is continued until the end of the operation unless the set hot water temperature is changed thereafter (regardless of whether the wind pressure switch 8 is turned on or off thereafter). (S6) Further, even if the set hot water temperature is changed (YES in S5), the change does not cause the necessary rotation speed of the blower fan 3 to be recalculated to be the predetermined rotation speed N S or more (S7). No),
Regardless of whether the wind pressure switch 8 is turned on or off thereafter, the wind pressure resistant operation of the on / off combustion is continued until the end of the operation (S6).

【0014】前記S5で、設定出湯温度が変更された場
合には、その設定出湯温度の変更に伴い、制御部16にお
いて必要燃焼熱量が演算され、この必要燃焼熱量に対す
る比例制御燃焼のための必要噴霧供給量と送風ファンの
必要回転数が演算される。そして演算された送風ファン
の必要回転数が前記一定回転数NS 以上となる場合に
は、演算された必要噴霧供給量と送風ファンの必要回転
数でもって比例制御燃焼に再変更される(S7でイエス
でS1へ)。一定回転数NS 未満の場合にはオンオフ燃
焼の耐風圧運転がそのまま継続される(S6)。
In step S5, when the set hot water temperature is changed, the required combustion heat quantity is calculated in the control unit 16 according to the change in the hot water temperature setting, and the necessary amount for proportional control combustion is calculated with respect to this necessary heat heat quantity. The spray supply amount and the required rotation speed of the blower fan are calculated. Then, when the calculated required rotation speed of the blower fan is equal to or higher than the constant rotation speed N S , it is changed again to proportional control combustion with the calculated required spray supply amount and the required rotation speed of the blower fan (S7). And yes to S1). When the rotational speed is less than the constant rotational speed N S, the wind pressure resistant operation of on-off combustion is continued (S6).

【0015】以上の実施例では通常時の燃焼運転を比例
制御運転とし、耐風圧運転をオンオフ制御運転とした
が、通常時の燃焼運転は必ずしも比例制御運転である必
要はなく、オンオフ制御運転であってもよい。この場合
には、燃焼出力として少なくとも2段階以上の異なる出
力を出すことができる燃焼器を用い、例えば通常運転時
におけるオンオフ燃焼を通常時の能力によるオンオフ燃
焼制御とし、耐風圧運転が必要となった場合には燃焼能
力をランクアップして、外部からの風圧に耐えることが
できる一定回転数NS のファン回転数と増大された燃料
噴霧供給量とからなる燃焼能力でもってオンオフ制御燃
焼する。図4に示すように、耐風圧運転時のオンオフ制
御燃焼は、そのハンチングの度合いが、通常運転時の場
合よりも大きくなる。が、外部からの風圧によって燃焼
を乱されることなく、総じて安定した燃焼による安定し
た燃焼熱量と出湯温度を得ることができる。その他、本
実施例では、送風手段として送風ファン3を用いたが、
回転式以外の送風手段を用いてもよく、その場合には、
回転数センサ15の代わりに送風量そのものを検出するセ
ンサを用いることで、同様な制御を行うことができる。
In the above embodiment, the normal combustion operation is the proportional control operation and the wind pressure resistant operation is the on / off control operation. However, the normal combustion operation does not necessarily have to be the proportional control operation. It may be. In this case, a combustor that can output at least two or more different levels of combustion output is used, and for example, on / off combustion during normal operation is set to on / off combustion control based on the capacity during normal operation, and wind pressure resistant operation is required. In this case, the combustion capacity is upgraded, and the on / off control combustion is performed with the combustion capacity composed of the fan rotation speed of the constant rotation speed N S capable of withstanding the wind pressure from the outside and the increased fuel spray supply amount. As shown in FIG. 4, the degree of hunting of the on / off controlled combustion during wind pressure resistant operation is greater than that during normal operation. However, it is possible to obtain a stable amount of combustion heat and a hot water outlet temperature by stable combustion as a whole without disturbing the combustion by the wind pressure from the outside. In addition, in the present embodiment, the blower fan 3 is used as the blower means,
Blowers other than the rotary type may be used, in which case,
Similar control can be performed by using a sensor that detects the air flow rate itself instead of the rotation speed sensor 15.

【0016】[0016]

【発明の効果】本発明は以上の構成、作用よりなり、請
求項1に記載の燃焼器の燃焼制御方法によれば、風圧ス
イッチが一定以上の風圧を検出した場合には、現行の送
風量が予め定めた一定送風量以上の送風量か否かを判定
して、未満の場合には送風量を前記一定送風量まで増加
させると共に燃料供給量を前記一定送風量に対する適正
な燃料供給量に調整して、オンオフ制御燃焼による耐風
圧運転を行い、且つ燃焼熱量の設定が前記一定送風量以
上の送風量となる値に設定変更されない限り、その後の
風圧スイッチの如何に係わらず、その運転が終了するま
では前記耐風圧運転を継続するようにしたので、外部か
らの風圧が不安定で、頻繁に風圧スイッチがオンオフす
る場合でも、燃焼熱量を設定された値から不安定に変動
させることなく安定させた状態で、しかも良好な耐風圧
性能を発揮させることができる。
According to the combustion control method of the combustor according to the first aspect of the present invention, the present invention has the above-described structure and operation, and when the wind pressure switch detects a wind pressure above a certain level, the current air flow rate. Is determined to be equal to or greater than a predetermined fixed air flow rate, and if less than the predetermined air flow rate, the air flow rate is increased to the constant air flow rate and the fuel supply amount is set to an appropriate fuel supply amount for the constant air flow rate. Adjusting, performing wind pressure resistant operation by on-off control combustion, and unless the setting of the combustion heat quantity is changed to a value that makes the air flow rate above the constant air flow rate, regardless of the subsequent wind pressure switch, that operation is performed. Since the wind pressure resistant operation is continued until the end, even if the wind pressure from the outside is unstable and the wind pressure switch is frequently turned on and off, the combustion heat amount does not fluctuate from the set value in an unstable manner. Cheap In a state of being, yet good wind pressure resistance performance can be exhibited.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明方法の実施例を示し、給湯器としての燃
焼装置の構成図である。
FIG. 1 shows an embodiment of the method of the present invention and is a configuration diagram of a combustion device as a water heater.

【図2】制御部による燃焼運転の制御フローチャートで
ある。
FIG. 2 is a control flowchart of a combustion operation by a control unit.

【図3】給湯温度制御のタイムチャートである。FIG. 3 is a time chart of hot water supply temperature control.

【図4】他の実施例による給湯温度制御のタイムチャー
トである。
FIG. 4 is a time chart of hot water supply temperature control according to another embodiment.

【符号の説明】[Explanation of symbols]

1 燃焼ケース 3 送風ファン 4 給湯用熱交換器 7 排気口 8 風圧スイッチ 15 回転数センサ 16 制御部 1 Combustion case 3 Blower fan 4 Heat exchanger for hot water supply 7 Exhaust port 8 Wind pressure switch 15 Rotation speed sensor 16 Control section

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 燃焼ケース内に供給された流体燃料を同
じく燃焼ケース内に送風された燃焼用空気で燃焼させ、
発生する排気ガスを排気口から強制排気することで、所
定の燃焼熱量を得るように比例制御燃焼若しくはオンオ
フ制御燃焼を通常時において行う燃焼器であって、排気
口付近に風圧スイッチを設け、該風圧スイッチが一定以
上の風圧を検出した場合には、現行の送風量が予め定め
た一定送風量以上の送風量か否かを判定して、未満の場
合には送風量を前記一定送風量まで増加させると共に燃
料供給量を前記一定送風量に対する適正な燃料供給量に
調整して、オンオフ制御燃焼による耐風圧運転を行い、
且つ燃焼熱量の設定が前記一定送風量以上の送風量とな
る値に設定変更されない限り、その後の風圧スイッチの
如何に係わらず、その運転が終了するまでは前記耐風圧
運転を継続するようにしたことを特徴とする燃焼器の燃
焼制御方法。
1. A fluid fuel supplied into a combustion case is combusted with combustion air also blown into the combustion case,
A combustor that performs proportional control combustion or on / off control combustion in a normal time so as to obtain a predetermined combustion heat amount by forcibly exhausting generated exhaust gas from the exhaust port, and provides a wind pressure switch near the exhaust port, When the wind pressure switch detects a wind pressure above a certain level, it is judged whether the current air flow rate is a predetermined air flow rate or more, and if less, the air flow rate is reduced to the above-mentioned constant air flow rate. The fuel supply amount is increased and adjusted to an appropriate fuel supply amount with respect to the constant air flow amount, and wind pressure resistant operation is performed by on / off control combustion,
And, unless the setting of the combustion heat quantity is changed to a value that gives an air flow rate equal to or higher than the constant air flow rate, the wind pressure resistant operation is continued until the operation ends, regardless of the subsequent air pressure switch. A combustion control method for a combustor, comprising:
JP05032785A 1993-01-27 1993-01-27 Combustor combustion control method Expired - Fee Related JP3139196B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05032785A JP3139196B2 (en) 1993-01-27 1993-01-27 Combustor combustion control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05032785A JP3139196B2 (en) 1993-01-27 1993-01-27 Combustor combustion control method

Publications (2)

Publication Number Publication Date
JPH06221553A true JPH06221553A (en) 1994-08-09
JP3139196B2 JP3139196B2 (en) 2001-02-26

Family

ID=12368511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05032785A Expired - Fee Related JP3139196B2 (en) 1993-01-27 1993-01-27 Combustor combustion control method

Country Status (1)

Country Link
JP (1) JP3139196B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013088024A (en) * 2011-10-18 2013-05-13 Miura Co Ltd Heat medium boiler
KR101365298B1 (en) * 2011-11-25 2014-02-19 선큐컴파니리미티드 Monitoring and controling method and apparatus for furnace pressure of combuster

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013088024A (en) * 2011-10-18 2013-05-13 Miura Co Ltd Heat medium boiler
KR101365298B1 (en) * 2011-11-25 2014-02-19 선큐컴파니리미티드 Monitoring and controling method and apparatus for furnace pressure of combuster

Also Published As

Publication number Publication date
JP3139196B2 (en) 2001-02-26

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