JPS6153605B2 - - Google Patents
Info
- Publication number
- JPS6153605B2 JPS6153605B2 JP56147601A JP14760181A JPS6153605B2 JP S6153605 B2 JPS6153605 B2 JP S6153605B2 JP 56147601 A JP56147601 A JP 56147601A JP 14760181 A JP14760181 A JP 14760181A JP S6153605 B2 JPS6153605 B2 JP S6153605B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- proportional control
- control valve
- valve opening
- energization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 230000005856 abnormality Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/18—Detecting fluid leaks
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)
- Feeding And Controlling Fuel (AREA)
Description
【発明の詳細な説明】
本発明は、通電量に応じて流体流量を連続的に
可変する比例制御弁を用い、例えば湯沸器等に使
用した場合湯温をその使用量が変つても一定に保
つよう燃焼量を制御する燃焼制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention uses a proportional control valve that continuously varies the fluid flow rate depending on the amount of electricity supplied, and when used in a water heater, for example, the water temperature remains constant even if the amount used changes. The present invention relates to a combustion control device that controls the amount of combustion to maintain the amount of combustion.
本発明の目的は、前記比例制御弁がなんらかの
原因により異常状態となつた時、それを検知して
元弁をOFFし、事故を未然に防ぐこと、及び器
具使用時の不快感を解消することのできる燃焼制
御装置を提供することにある。 The purpose of the present invention is to detect when the proportional control valve becomes abnormal for some reason and turn off the main valve, thereby preventing accidents and eliminating discomfort when using the device. The purpose of the present invention is to provide a combustion control device that can perform the following functions.
従来より、弁に電磁力を作用させ通電量に応じ
て流量を連続的に変える比例制御弁が提案されて
おり、器具の使い勝手の向上が図られ、大きな効
果を奏している。この比例制御弁の構成を大別す
ると流量制御部と電気駆動部とに分けられ、流量
制御部は、ダイアフラムを設けて衆知のガバナ機
能を併設したものとしないものとに分類され、電
気駆動部としては、電磁プランジヤ型、ムービン
グコイル型、反発磁石型、モーター駆動型等種々
提案されている。 BACKGROUND ART Proportional control valves have been proposed in the past that apply electromagnetic force to the valve to continuously change the flow rate depending on the amount of current applied, and have been shown to be highly effective in improving the usability of the device. The structure of this proportional control valve can be roughly divided into a flow rate control section and an electric drive section.The flow control section is classified into those with a diaphragm and a well-known governor function and those without, and the electric drive section. Various types have been proposed, including an electromagnetic plunger type, a moving coil type, a repulsion magnet type, and a motor-driven type.
しかしながら従来の比例制御弁では、万一比例
制御弁が故障した場合に安全上の不安があつた。 However, with conventional proportional control valves, there was a safety concern in the event that the proportional control valve should malfunction.
その第１は前記流量制御部がガバナ機能を併設
した構造の場合、前記ダイアフラムの破損する心
配があることである。通常このダイアフラムは、
比例制御弁の動作特性の点から0.3mm前後の厚さ
のニトリルゴム製のものが使用され、またこの種
の比例制御弁では衆知のガバナのように出口圧力
を一定に保つのみでなく、湯温等を検知し、その
信号に応じて弁開度が変化するため、器具の使用
中常時ダイアフラムは繰返し応力を受けることに
なる。更に応力がかかつた状態で大気中の濃度が
高いオゾンと作用すると、オゾンにより劣化が発
生することがある。その結果、ダイアフラムが破
損し、生ガスが大気中に流出する事故につながる
心配があつた。 The first problem is that if the flow rate control section has a structure in which a governor function is also provided, there is a risk that the diaphragm may be damaged. This diaphragm is usually
A proportional control valve made of nitrile rubber with a thickness of around 0.3 mm is used from the viewpoint of operating characteristics.In addition, this type of proportional control valve not only maintains the outlet pressure constant like a well-known governor, but also Since the temperature, etc. is detected and the valve opening changes according to the signal, the diaphragm is constantly subjected to repeated stress while the device is in use. Furthermore, if it interacts with ozone, which has a high concentration in the atmosphere, under stress, ozone may cause deterioration. As a result, there was concern that the diaphragm would break and raw gas would leak into the atmosphere.
第２は、全開燃焼の状態で前記電気駆動部がロ
ツクされた場合等比例制御弁が異常状態となつた
時、器具として湯沸器の場合を考えると、設定温
度より高い温度の湯が出て不快感を与える。従つ
て比例制御弁がもし故障した場合の安全対策が要
望されていた。 Second, when the electric drive unit is locked in a fully open combustion state, and the proportional control valve becomes abnormal, hot water at a temperature higher than the set temperature will be produced, considering the case of a water heater. It makes you feel uncomfortable. Therefore, there has been a need for safety measures in case the proportional control valve fails.
本発明は上記実情にのぞみ比例制御弁に与えら
れる通電量に対して弁開度は所定の範囲内にある
ことに着目し、比例制御弁の弁開度を検出する、
弁開度検知器を設けるとともに、比例制御弁への
通電量を検知する通電量検知回路と、検知された
弁開度及び通電量を比較判別する判別回路を設け
ることにより、所定の通電量における弁開度を検
知し、比例制御弁が異常状態となり、弁開度が所
定の弁開度の範囲外となつた時、上流側に設けた
元弁をOFFしてガス回路を遮断するように構成
することにより安全性に優れた燃焼制御装置を提
供するものであり、以下図面とともに説明する。 In view of the above-mentioned circumstances, the present invention focuses on the fact that the valve opening is within a predetermined range with respect to the amount of current applied to the proportional control valve, and detects the valve opening of the proportional control valve.
By providing a valve opening degree detector, an energization amount detection circuit that detects the amount of energization to the proportional control valve, and a discrimination circuit that compares and determines the detected valve opening degree and energization amount, it is possible to The valve opening is detected, and when the proportional control valve becomes abnormal and the valve opening is outside the specified valve opening range, the main valve installed on the upstream side is turned off and the gas circuit is cut off. This configuration provides a combustion control device with excellent safety, which will be explained below with reference to the drawings.
第１図は、本発明の一実施例を示す湯沸器の構
造図であり、１は元弁、２は閉止弁であり、その
中間点より分岐してパイロツトバーナー３へのガ
ス通路４が設けられている。５は後に詳述する構
造の比例制御弁であり、上部に検知コイル６及び
磁気コア７からなる差動変圧器型の弁開度検知器
８が設けられている。９は比例制御弁５の下流側
に設けた器具ノズル、１０はメインバーナー、１
１はメインバーナの上部に設けた熱交換器であ
る。１２は、熱交換器１１で熱せられた湯の温度
を検知する湯温検知素子であり、検知信号を電気
制御回路１３へ送り、電気制御回路１３はその信
号に応じて比例制御弁５への通電量を制御する。 FIG. 1 is a structural diagram of a water heater showing an embodiment of the present invention, in which 1 is a main valve, 2 is a stop valve, and a gas passage 4 branches from the middle point to a pilot burner 3. It is provided. Reference numeral 5 denotes a proportional control valve having a structure to be described in detail later, and a differential transformer type valve opening detector 8 comprising a detection coil 6 and a magnetic core 7 is provided on the upper part. 9 is an instrument nozzle provided downstream of the proportional control valve 5; 10 is a main burner;
1 is a heat exchanger provided above the main burner. 12 is a hot water temperature detection element that detects the temperature of hot water heated by the heat exchanger 11, and sends a detection signal to the electric control circuit 13, and the electric control circuit 13 controls the proportional control valve 5 according to the signal. Controls the amount of electricity.
１４は前記比例制御弁５への通電量を検知する
通電量検知回路であり、前記弁開度検知器８から
の信号を受ける判別回路１５へ信号を与える。 Reference numeral 14 denotes an energization amount detection circuit for detecting the amount of energization to the proportional control valve 5, and provides a signal to the discrimination circuit 15 which receives the signal from the valve opening degree detector 8.
第２図は前記判別回路１５の構造を示すブロツ
ク図であり、１６は弁開度検知器８の信号を受け
る検出器、１７は前記比例制御弁５に与える通電
量、及び弁開度の値を設定する設定器、１８は、
前記設定器１７の値と、通電量検知回路１４の信
号、及び弁開度検知器８からの信号を比較する比
較器であり、所定の通電量において所定の弁開度
からはずれた場合、電気制御回路１３へ信号を送
り、元弁１をOFFするように構成されている。 FIG. 2 is a block diagram showing the structure of the discrimination circuit 15, in which 16 is a detector that receives the signal from the valve opening detector 8, and 17 is the amount of current applied to the proportional control valve 5 and the value of the valve opening. A setting device 18 for setting the
This is a comparator that compares the value of the setting device 17, the signal of the energization amount detection circuit 14, and the signal from the valve opening degree detector 8. If the amount of energization deviates from the predetermined valve opening degree, the It is configured to send a signal to the control circuit 13 and turn off the main valve 1.
第３図は比例制御弁５の構造図を示し、１９は
流体入口、２０は流体出口、２１は弁座、２２は
弁座２１に対向して設けた弁体、２３は弁体２２
の上部に設けたダイアフラムでありガバナ部が形
成されている。２４は電磁コイル、２５は板バネ
２６により、電磁コイル２４と略同軸上に支持さ
れたプランジヤであり、電磁コイル２４に通電す
ることにより発生する力を弁体２２に伝達し、ス
プリング２７の閉止力に打勝つて開弁するごとく
構成されている。 FIG. 3 shows a structural diagram of the proportional control valve 5, in which 19 is a fluid inlet, 20 is a fluid outlet, 21 is a valve seat, 22 is a valve body provided opposite to the valve seat 21, and 23 is a valve body 22.
It is a diaphragm provided on the upper part of the diaphragm, and a governor part is formed. 24 is an electromagnetic coil, and 25 is a plunger supported substantially coaxially with the electromagnetic coil 24 by a plate spring 26, which transmits the force generated by energizing the electromagnetic coil 24 to the valve body 22, and closes the spring 27. It is structured as if it were to overcome a force and open a valve.
またプランジヤ２５の上部には、前記磁気コア
７が設けられており、磁気コア７に対向して設け
た検知コイル６とにより、差動変圧器型の弁開度
検知器８が構成されており、プランジヤ２５の移
動量、すなわち弁開度ｘの値を判別回路１５へ伝
達する。２８は背圧室２９と大気とを連通する大
気連通孔であり、ガバナ鳴き等の関係から0.5〜
0.7mm程度の小孔が設けられている。 Further, the magnetic core 7 is provided at the upper part of the plunger 25, and a differential transformer type valve opening detector 8 is constituted by a detection coil 6 provided opposite to the magnetic core 7. , the amount of movement of the plunger 25, that is, the value of the valve opening degree x, is transmitted to the discrimination circuit 15. Reference numeral 28 is an atmospheric communication hole that communicates the back pressure chamber 29 with the atmosphere.
A small hole of about 0.7 mm is provided.
以上の構成において次に動作を説明する。 Next, the operation of the above configuration will be explained.
正常動作時においては、元弁１をONするとガ
スはパイロツトバーナーへのガス通路４を通り、
パイロツトバーナー３への点火がなされる。その
後閉止弁２をONするとガスは比例制御弁５へ流
入し、電磁コイル２４へ通電すると開弁して器具
ノズル９からメインバーナー１０へと流入し燃焼
が開始される。メインバーナー１０へ着火する
と、熱交換器１１はその燃焼熱を受け通過する水
を加熱する。熱交換器１１の下流に設けた湯温検
知素子１２は湯温を電気制御回路１３へフイード
バツクし、その信号に応じて比例制御弁５への通
電量が制御される。つまり所要の湯温となるよう
燃焼量が制御される。ここで比例制御弁５は衆知
のガバナ機能も果す。第４図は比例制御弁５の電
磁コイル２４への通電量Ｉ（ｍＡ）と弁開度ｘ
（mm）の関係を示す特性図であり、所定の供給圧
の場合はＡとなり、供給圧の変動、及び比例制御
弁５の特性バラツキを考慮した場合の特性の範囲
はＢ、Ｃとなる。つまり、正常動作時において
は、Ｂ〜Ｃの範囲内で動作していることになる。 During normal operation, when main valve 1 is turned on, gas passes through gas passage 4 to the pilot burner,
The pilot burner 3 is ignited. Thereafter, when the shutoff valve 2 is turned on, the gas flows into the proportional control valve 5, and when the electromagnetic coil 24 is energized, the valve is opened and gas flows into the main burner 10 from the appliance nozzle 9 to start combustion. When the main burner 10 is ignited, the heat exchanger 11 receives the combustion heat and heats the water passing therethrough. A hot water temperature sensing element 12 provided downstream of the heat exchanger 11 feeds back the hot water temperature to an electric control circuit 13, and the amount of current supplied to the proportional control valve 5 is controlled in accordance with the signal. In other words, the amount of combustion is controlled so that the required hot water temperature is achieved. Here, the proportional control valve 5 also performs a well-known governor function. Figure 4 shows the amount of current I (mA) to the electromagnetic coil 24 of the proportional control valve 5 and the valve opening x.
(mm), where A is the case at a predetermined supply pressure, and B and C are the characteristic ranges when taking into account fluctuations in the supply pressure and variations in the characteristics of the proportional control valve 5. That is, during normal operation, it operates within the range of B to C.
次に異常時すなわちダイアフラム２３が破損し
て生ガスが背圧室２９に流入した場合の動作につ
いて説明する。第３図において、ダイアフラム２
３が開孔すると、背圧室２９に流体入口１９の圧
力P1が作用する。この時生ガスはダイアフラム２
３の開孔部（通常は微小なものである）より、背
圧室２９をへて大気連通孔２８から流出するた
め、背圧室２９の圧力はP1よりも小さくなる。こ
の圧力をP3とし、ダイアフラム２３の有効受圧面
積をＳDとすると、P3・ＳDだけ下向きの力が大き
くなる。つまり第４図Ｐ点、Ｑ点等に示すように
同一電流imにおいて弁開度は正常動作範囲より
も大きくなることがわかる。弁開度検知器８はそ
の異常信号を判別回路１５に与え、比較器１８で
設定器１７の値と比較され電気制御回路１３は元
弁１をOFFする。また第３図において、全開燃
焼状態で板バネ２６が破断し、プランジヤ２５が
電磁コイル２６に接触してロツクされた場合にお
いても同様に正常動作範囲からはずれるため元弁
１はOFFされる。また本発明の実施例では弁開
度ｘが正常動作範囲よりも小さい場合、すなわち
弁開度がxmよりも小さい場合も元弁１を遮断可
能である。 Next, the operation in an abnormal situation, that is, when the diaphragm 23 is broken and raw gas flows into the back pressure chamber 29, will be described. In Figure 3, diaphragm 2
3 is opened, the pressure P 1 of the fluid inlet 19 acts on the back pressure chamber 29. At this time, the raw gas is diaphragm 2
The pressure in the back pressure chamber 29 becomes smaller than P 1 because the air flows out from the atmosphere communication hole 28 through the back pressure chamber 29 through the opening (usually minute) at No. 3. If this pressure is P 3 and the effective pressure-receiving area of the diaphragm 23 is S D , then the downward force increases by P 3 · S D. In other words, as shown at points P and Q in FIG. 4, it can be seen that at the same current im, the valve opening becomes larger than the normal operating range. The valve opening degree detector 8 gives the abnormal signal to the discrimination circuit 15, which is compared with the value of the setting device 17 by the comparator 18, and the electric control circuit 13 turns off the main valve 1. Further, in FIG. 3, when the leaf spring 26 breaks in the fully open combustion state and the plunger 25 contacts the electromagnetic coil 26 and is locked, the main valve 1 is also turned OFF because the plunger 25 is out of the normal operating range. Further, in the embodiment of the present invention, the main valve 1 can be shut off even when the valve opening degree x is smaller than the normal operating range, that is, when the valve opening degree is smaller than xm.
つまり、通電量検知回路１４での検知信号が所
定の電流値imとなつた時のみ弁開度検知器８の
信号を判別回路１５で判別し、その弁開度ｘが正
常動作範囲外となる場合のみ元弁１をOFFする
ものであり、プランジヤ２５の摩耗、板バネ２６
の破断によるプランジヤ２５のロツク、コイル２
４の断線及び本実施例のごとくダイアフラム２３
を内蔵する形式のものにおいてはダイアフラムの
破損等比例制御弁の異常を高精度に検知し、湯沸
器に実装した場合の高温出湯、不完全燃焼、ダイ
アフラムの破損による生ガスの流出等不安全動作
を未然に防止することができる。 In other words, only when the detection signal from the energization amount detection circuit 14 reaches a predetermined current value im, the signal from the valve opening degree detector 8 is determined by the discrimination circuit 15, and the valve opening degree x is outside the normal operating range. The main valve 1 is turned OFF only when the plunger 25 wears out and the leaf spring 26
Locking of plunger 25 due to breakage of coil 2
4 and the diaphragm 23 as in this example.
The type with a built-in diaphragm can detect abnormalities in the proportional control valve such as damage to the diaphragm with high accuracy, and when installed in a water heater, it can prevent unsafe conditions such as high temperature hot water, incomplete combustion, and raw gas leakage due to damage to the diaphragm. It is possible to prevent the operation from occurring.
また電気制御回路１３の故障によりコイル２４
に過大電流が流れた場合においてもコイル電流Ｉ
と弁開度Ｘの関係は設定器１７で設定された範囲
外となり元弁１をOFFにし安全側へ動作する。
なお前記通電量検知回路１４で検知する信号は、
実用上、電磁コイル２４に流れる電流でもよい
し、電気制御回路１３からの指令信号、すなわち
電磁コイル２４へ流すべき電流値に対応した信号
であればよい。 Also, due to a failure in the electric control circuit 13, the coil 24
Even if an excessive current flows in the coil current I
The relationship between the valve opening degree
The signal detected by the energization amount detection circuit 14 is as follows:
Practically speaking, it may be a current flowing through the electromagnetic coil 24 or a command signal from the electric control circuit 13, that is, a signal corresponding to the current value to be passed through the electromagnetic coil 24.
またその電流の量、すなわち第４図における
imは、比例制御弁５の初期供給電流（例えば緩
点火電流）と異なる値に設定する。これは閉止弁
２をONすると急激に比例制御弁５に圧力が作用
し、過渡的に所定の弁開度の範囲を外れる場合が
あるためである。さらに本実施例のごとく所定の
電流値imでのみ弁開度Ｘの信号を判別するのみ
でなく、制御範囲全域にわたりコイル電流Ｉと弁
開度Ｘの信号を比較器１８に取込み、第４図の特
性ＢとＣに示す正常動作範囲外となつた時元弁１
をOFFするようにしてもよい。これにより比例
制御弁の動作中は常時異常検知が行なえ、より信
頼性が向上する。 Also, the amount of current, that is, in Fig. 4
im is set to a value different from the initial supply current (for example, slow ignition current) of the proportional control valve 5. This is because when the shutoff valve 2 is turned on, pressure suddenly acts on the proportional control valve 5, and the valve opening degree may transiently deviate from the predetermined range. Furthermore, in addition to determining the signal of the valve opening X only at a predetermined current value im as in this embodiment, the signal of the coil current I and the valve opening X is input to the comparator 18 over the entire control range, as shown in FIG. When the main valve 1 falls outside the normal operating range shown in characteristics B and C of
may be turned off. This allows abnormality detection to be performed at all times while the proportional control valve is in operation, further improving reliability.
また図示していないが、必要によりブザーもし
くは発光ダイオード等により異常を報知する異常
報知手段を設けることも可能である。 Although not shown, it is also possible to provide abnormality notification means for notifying an abnormality using a buzzer, a light emitting diode, or the like, if necessary.
以上詳細に説明したように本発明は比例制御弁
に与えられる通電量が一定の時、比例制御弁の弁
開度は所定の範囲内にあることに着目し、弁開度
検知器と通電量検知回路を設け、比例制御弁に異
常が発生した時通電量と弁開度の関係が設定範囲
外となつたことを検知し、上流側に設けた元弁を
閉成するものであり以下の効果を有する。 As explained in detail above, the present invention focuses on the fact that when the amount of energization given to the proportional control valve is constant, the valve opening of the proportional control valve is within a predetermined range. A detection circuit is installed, and when an abnormality occurs in the proportional control valve, it detects that the relationship between the amount of energization and the valve opening is outside the set range, and closes the main valve installed on the upstream side. have an effect.
(1) 通電量と弁開度を検知することにより比例制
御弁自体の異常、故障の判別が可能となり危険
状態を未然に防止できるため安全性が向上す
る。(1) By detecting the amount of energization and valve opening, it is possible to determine whether there is an abnormality or failure in the proportional control valve itself, and dangerous situations can be prevented, improving safety.
(2) 通電量検知回路と弁開度検知器の両方の信号
と設定値を比較する判別回路を設けて異常を検
出するため異常検出精度が向上する。つまり比
例制御弁が正常である時のみ燃焼制御が行なわ
れる。したがつて高精度の燃焼制御が可能とな
る。このことは特に高精度のガス量制御を必要
とするＡ／Ｆ制御に好適である。(2) Abnormality detection accuracy is improved because an abnormality is detected by providing a discrimination circuit that compares the signals and set values of both the energization amount detection circuit and the valve opening degree detector. In other words, combustion control is performed only when the proportional control valve is normal. Therefore, highly accurate combustion control becomes possible. This is particularly suitable for A/F control that requires highly accurate gas amount control.
(3) 通電量検知回路と弁開度検知器及び判別回路
を設けたため電気制御回路側の故障も検知し安
全側へ動作させることができる。(3) Since a current flow detection circuit, a valve opening degree detector, and a discrimination circuit are installed, failures on the electrical control circuit side can also be detected and operation can be performed safely.
第１図は本発明の一実施例を示す湯沸器の構造
図、第２図は同、判別回路の構造を示すブロツク
図、第３図は同、比例制御弁の断面構造図、第４
図は比例制御弁のコイル電流と弁開度の関係を示
す特性図である。
１……元弁、５……比例制御弁、６……検知コ
イル、７……磁器コア、８，８ａ……弁開度検知
器、１３……電気制御回路、１４……通電量検知
回路、１５……判別回路。
Fig. 1 is a structural diagram of a water heater showing an embodiment of the present invention, Fig. 2 is a block diagram showing the structure of a discriminating circuit, Fig. 3 is a cross-sectional structural diagram of a proportional control valve, and Fig. 4 is a block diagram showing the structure of a discriminating circuit.
The figure is a characteristic diagram showing the relationship between the coil current of the proportional control valve and the valve opening degree. 1... Main valve, 5... Proportional control valve, 6... Detection coil, 7... Porcelain core, 8, 8a... Valve opening degree detector, 13... Electric control circuit, 14... Energization amount detection circuit , 15...Discrimination circuit.
Claims (1)
例制御弁と、前記比例制御弁に設けられた弁開度
検知器と、前記比例制御弁への通電量を検知する
通電量検知回路と、前記弁開度検知器と通電量検
知回路の信号と設定値とを比較する判別回路と、
前記比例制御弁の上流側に設けられ前記比例制御
弁の異常により前記弁開度検知器と通電量検知回
路の信号が前記設定値外となつた時閉成される元
弁とから構成した燃焼制御装置。1. A proportional control valve that varies a fluid flow passage cross-sectional area according to the amount of energization, a valve opening detector provided in the proportional control valve, and an energization amount detection circuit that detects the amount of energization to the proportional control valve. , a determination circuit that compares the signals of the valve opening degree detector and the energization amount detection circuit with a set value;
A combustion engine provided on the upstream side of the proportional control valve and comprising a main valve that is closed when the valve opening degree detector and the signal of the energization amount detection circuit become outside the set value due to an abnormality in the proportional control valve. Control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56147601A JPS5847922A (en) | 1981-09-17 | 1981-09-17 | Combustion controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56147601A JPS5847922A (en) | 1981-09-17 | 1981-09-17 | Combustion controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5847922A JPS5847922A (en) | 1983-03-19 |
| JPS6153605B2 true JPS6153605B2 (en) | 1986-11-18 |
Family
ID=15434019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56147601A Granted JPS5847922A (en) | 1981-09-17 | 1981-09-17 | Combustion controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5847922A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60213306A (en) * | 1984-04-09 | 1985-10-25 | Hitachi Ltd | Method for controlling sheet thickness in rolling mill |
| JPH0730918B2 (en) * | 1986-08-20 | 1995-04-10 | 松下電器産業株式会社 | Combustion control device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547000B2 (en) * | 1971-12-30 | 1980-11-27 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629551Y2 (en) * | 1979-10-04 | 1981-07-14 |
-
1981
- 1981-09-17 JP JP56147601A patent/JPS5847922A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547000B2 (en) * | 1971-12-30 | 1980-11-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5847922A (en) | 1983-03-19 |
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