JPH0678815B2 - Power failure safety device for combustion appliances - Google Patents
Power failure safety device for combustion appliancesInfo
- Publication number
- JPH0678815B2 JPH0678815B2 JP60248226A JP24822685A JPH0678815B2 JP H0678815 B2 JPH0678815 B2 JP H0678815B2 JP 60248226 A JP60248226 A JP 60248226A JP 24822685 A JP24822685 A JP 24822685A JP H0678815 B2 JPH0678815 B2 JP H0678815B2
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- power
- power failure
- voltage
- solenoid valve
- 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 - Lifetime
Links
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
- F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements 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
- F23N2223/08—Microprocessor; Microcomputer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/04—Fail safe for electrical power failures
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)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は停電時間に応じて燃焼器具を安全に動作させる
燃焼器具の停電安全装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power failure safety device for a combustion appliance that safely operates the combustion appliance in accordance with a power failure time.
従来の技術 一般に電源を必要とする燃焼器具において、燃焼器具の
使用中に停電が発生すると、停電とともに燃焼器具の動
作が停止し、停電が終わって電源が復帰しても燃焼器具
は再始動しないことが燃焼器具においては安全面から必
要なことである。Conventional technology Generally, in a combustion appliance that requires a power source, if a power failure occurs during use of the combustion appliance, the operation of the combustion appliance stops along with the power failure, and the combustion appliance does not restart even when the power is restored after the power failure. That is necessary for safety in combustion appliances.
すなわち停電が発生して燃焼器具がその動作を停止し、
そのまま運転スイッチ「入」になったまま切り忘れてい
て、停電が終わるとともに燃焼器具が勝手に動作して燃
焼を始めることは、安全性の面から好ましくないのであ
る。一方、人間が気付かないような極めて短時間の停電
に対して、その都度燃焼器具が停止していては、使用者
にとっては、誤動作としか判断できず、使い勝手が悪い
ため、従来の燃焼器具の停電安全装置は、電源バックア
ップコンデンサと、燃焼器具が正常に動作するために必
要な電源の電圧検出器を備え、短時間の停電に対しては
前記バックアップコンデンサで燃焼器具の動作を継続さ
せ、長時間の停電に対しては、前記電圧検出器からの信
号により燃焼器具を安全に停止させるものであった。That is, a power outage occurs and the combustion appliance stops its operation,
It is unfavorable from a safety point of view that if the power switch is turned on as it is and is forgotten to be turned off, and the power failure ends, the combustion device automatically operates to start combustion. On the other hand, for an extremely short power failure that humans do not notice, if the combustion appliance is stopped each time, it can only be judged as a malfunction by the user and the usability is poor, so The power outage safety device is equipped with a power supply backup capacitor and a voltage detector for the power supply necessary for the combustion appliance to operate normally. In case of a power failure for a certain period of time, the signal from the voltage detector was used to safely stop the combustion appliance.
発明が解決しようとする問題点 しかし従来の構成では、人間が停電に気付く限界時間0.
1〜0.2秒程度しか、停電に対して燃焼器具の動作を継続
できず、またそのためのバックアップコンデンサも極め
て大容量のものが必要であり、燃焼器具の電源の負荷に
よっては、前記の人間が停電に気付く限界時間すら燃焼
器具の動作を継続できないものであり、使い勝手が悪い
こと、および使用者に誤動作と間違われるなどの問題が
あった。Problems to be Solved by the Invention However, with the conventional configuration, the limit time for humans to notice a power failure is 0.
Only about 1 to 0.2 seconds can continue the operation of the combustion appliance against a power failure, and also an extremely large backup capacitor is required for that, and depending on the load of the power supply of the combustion appliance, the human being will lose power. However, there is a problem in that the operation of the combustion instrument cannot be continued even for the limit time, and the usability is poor, and the user mistakenly thinks it is a malfunction.
本発明は上記問題点を解決するために、極めて短時間の
停電に対しては、燃焼器具の動作を継続し、それより長
く人間が停電に気付きにくいような時間の停電に対して
は、停電が終わるとともに燃焼器具が自動的に再始動
し、それよりも長い時間の停電に対しては、停電が終わ
っても燃焼器具を動作させない燃焼器具の停電安全装置
を提供することを目的とする。In order to solve the above-mentioned problems, the present invention continues the operation of a combustion appliance for a power failure for an extremely short time, and for a power failure for a time longer than that, which makes it difficult for humans to notice the power failure, a power failure. It is an object of the present invention to provide a power failure safety device for a combustion appliance that does not operate even when the power failure ends even if the power consumption of the combustion appliance restarts automatically after the end of the power failure.
問題点を解決するための手段 上記目的を達成するために本発明の燃焼器具の停電安全
装置は、燃焼器具の燃料の供給を制御する電磁弁の電源
バックアップコンデンサと、前記電磁弁が動作するのに
必要な電圧を検出する電圧検出器と、前記電磁弁の動作
を制御するマイクロコンピュータと、このマイクロコン
ピュータの電源バックアップコンデンサと、このマイク
ロコンピュータが正常に動作するために必要な電圧を検
出する電圧検出器とを備え、前記２つの電圧検出器の信
号で燃焼器具の停電に対する動作を決定する手段を、前
記マイクロコンピュータ内に備えた構成である。Means for Solving the Problems In order to achieve the above object, a power failure safety device for a combustion appliance according to the present invention comprises a power backup capacitor for a solenoid valve that controls the supply of fuel to the combustion appliance, and the solenoid valve operates. Voltage detector for detecting the voltage necessary for the microcomputer, a microcomputer for controlling the operation of the solenoid valve, a power backup capacitor for the microcomputer, and a voltage for detecting the voltage required for the microcomputer to operate normally. A detector, and means for deciding the operation of the combustion appliance against a power failure by the signals of the two voltage detectors is provided in the microcomputer.
作用 本発明は上記した構成によって、極めて短時間の停電に
対しては、電磁弁およびマイクロコンピュータの両方の
電源バックアップコンデンサにより燃焼器具の動作を継
続され、それにより長く人間が停電に気付きにくいよう
な停電に対しては、最も早く動作継続不能となる電磁弁
の電源の電圧検出器の信号とマイクロコンピュータ内の
動作決定手段により、一度燃焼器具の動作を停止させ、
その後停電が終わって電源が復帰すると自動的に燃焼器
具を再始動させ、さらに長い時間にわたって停電が続く
とマイクロコンピュータの電源電圧も降下し、その電圧
検出器の信号とマイクロコンピュータ内の動作決定手段
により、燃焼器具の動作を完全に停止させて停電が終わ
って電源が復帰しても燃焼器具は停止したままとなる。With the above-mentioned configuration, the present invention allows the operation of the combustion appliance to be continued by the power backup capacitors of both the solenoid valve and the microcomputer for a power failure for an extremely short time, which makes it difficult for humans to notice the power failure for a long time. In the event of a power failure, the operation of the combustion appliance is once stopped by the signal of the voltage detector of the power source of the solenoid valve, which makes it impossible to continue operation, and the operation determining means in the microcomputer.
After that, when the power failure is over and the power is restored, the combustion appliances are automatically restarted, and if the power failure continues for a longer time, the power supply voltage of the microcomputer also drops, and the signal of the voltage detector and the operation determining means in the microcomputer. As a result, even if the operation of the burning appliance is completely stopped and the power is restored after the power failure, the burning appliance remains stopped.
実施例 第１図は本発明の一実施例における回路構成図を示し１
はマイクロコンピュータで、２はその電源、３はその電
源のバックアップコンデンサであり、４は電源２の電圧
検出器で、その電圧VDDがマイクロコンピュータ１にと
って正常に動作できる電圧か否かを判定し、その信号を
マイクロコンピュータ１に入力している。５はバーナに
燃料を供給および停止させる電磁弁６の電源、７はその
電源のバックアップコンデンサであり８は電源５の電圧
検出器で、その電圧VCCが電磁弁６の動作に充分な電圧
か否かを判定しその信号をマイクロコンピュータ１に入
力している。一方電磁弁６はマイクロコンピュータ１の
出力信号によりトランジスタ９を介して電力を供給され
て駆動される。Embodiment 1 FIG. 1 shows a circuit configuration diagram in an embodiment of the present invention.
Is a microcomputer, 2 is its power supply, 3 is a backup capacitor for the power supply, 4 is a voltage detector of the power supply 2, and determines whether or not the voltage V DD is a voltage at which the microcomputer 1 can operate normally. , The signal is input to the microcomputer 1. 5 is a power source of the solenoid valve 6 for supplying and stopping fuel to the burner, 7 is a backup capacitor for the power source, 8 is a voltage detector of the power source 5, and whether the voltage V CC is sufficient for the operation of the solenoid valve 6. It is determined whether or not the signal is input to the microcomputer 1. On the other hand, the solenoid valve 6 is driven by electric power supplied from the microcomputer 1 via the transistor 9.
以上のように構成された燃焼器具の停電安全装置につい
て、以下その動作を説明する。The operation of the power failure safety device for a combustion appliance configured as described above will be described below.
停電の発生と同時にマイクロコンピュータ１の電源２の
電圧VDDと、電磁弁６の電源５の電圧VCCは、そのバック
アップコンデンサ３および７によって第２図に示すよう
な放電曲線に従って降下する。ここで電磁弁６の消費電
力は、マイクロコンピュータ１の消費電力に比べるとは
るかに大きく、従ってVCCの電圧降下の時定数はVDDの電
圧降下の次定数よりはるかに小さい。停電の発生からV
CCが電磁弁６の動作可能最低電圧VCOに達するまでの時
間をt1とし、この時に電圧検出器８がその信号をマイク
ロコンピュータ１に伝え、一方同様にVDDがマイクロコ
ンピュータ１の動作可能最低電圧VDDに達するまでの時
間をt2とし、この時に電圧検出器４がその信号をマイク
ロコンピュータ１に伝える。Simultaneously with the occurrence of the power failure, the voltage V DD of the power source 2 of the microcomputer 1 and the voltage V CC of the power source 5 of the solenoid valve 6 drop by the backup capacitors 3 and 7 according to the discharge curve as shown in FIG. Here, the power consumption of the solenoid valve 6 is much larger than that of the microcomputer 1, and therefore the time constant of the voltage drop of V CC is much smaller than the second constant of the voltage drop of V DD . From power failure to V
The time required for CC to reach the minimum operable voltage V CO of the solenoid valve 6 is t1, and at this time, the voltage detector 8 transmits the signal to the microcomputer 1, while similarly V DD is the minimum operable voltage of the microcomputer 1. The time required to reach the voltage V DD is t2, and the voltage detector 4 transmits the signal to the microcomputer 1 at this time.
ここで停電時間がt1以下の場合、２つの電圧検出器４お
よび８からの信号はなく従って燃焼器具は動作を継続す
ることになる。次に停電時間がt1以上でt2以下の場合、
停電からt1後に電圧検出器８がVCCの電圧降下を検出
し、その信号がマイクロコンピュータ１に入力され、マ
イクロコンピュータ１は電磁弁６を停止する信号を出力
し燃焼器具の動作を停止し、停電が終わって源が復帰
し、前記VCCがVCO以上になったことを電圧検出器８が検
出し、その信号がマイクロコンピュータ１に入力される
とマイクロコンピュータ１は再び燃焼器具を動作させる
信号を出力する。さらに停電時間が長く、t2以上の場
合、上記と同様t1後に燃焼器具の動作を停止し、t2後に
は電圧検出器４がVDDの電圧降下を検出し、その信号が
マイクロコンピュータ１に入力される。この信号が入力
されると停電が終わって電源が復帰してもマイクロコン
ピュータ１により燃焼器具の動作を停止させたままにす
ることができる。Here, if the power failure time is t1 or less, there is no signal from the two voltage detectors 4 and 8 and the combustion appliance will therefore continue to operate. Next, if the power failure time is t1 or more and t2 or less,
After t1 from the power failure, the voltage detector 8 detects the voltage drop of V CC , the signal is input to the microcomputer 1, the microcomputer 1 outputs a signal to stop the solenoid valve 6, and stops the operation of the combustion appliance, After the power failure is completed, the power source is restored, the voltage detector 8 detects that the V CC has become equal to or higher than V CO , and when the signal is input to the microcomputer 1, the microcomputer 1 operates the combustion appliance again. Output a signal. When the power failure time is longer and t2 or more, the operation of the combustion appliance is stopped after t1 as described above, the voltage detector 4 detects the voltage drop of V DD after t2, and the signal is input to the microcomputer 1. It When this signal is input, the microcomputer 1 can keep the operation of the combustion appliance stopped even after the power is restored and the power is restored.
以上のように本実施例によれば、電磁弁が動作するため
に必要な最低電圧を検出する電圧検出器と、マイクロコ
ンピュータが動作するために必要な最低電圧を検出する
電圧検出器と、両検出器の信号を入力して燃焼器具の動
作を決定する手段を備えたマイクロコンピュータによ
り、燃焼器具の動作継続可能な停電時間t1よりかなり長
い時間の停電に対しても、一度燃焼器具は停止するがそ
の後電源の復帰とともに再び自動的に燃焼器具を始動さ
せてみかけ上、燃焼器具の動作を継続させることができ
る。As described above, according to the present embodiment, both the voltage detector that detects the minimum voltage required for the solenoid valve to operate and the voltage detector that detects the minimum voltage required for the microcomputer to operate, With a microcomputer equipped with a means for determining the operation of the combustion appliance by inputting the signal of the detector, the combustion appliance is stopped once for a power failure for a time considerably longer than the power failure time t1 in which the operation of the combustion appliance can be continued. After that, when the power is restored, the combustion appliance is automatically started again, and the operation of the combustion appliance can be continued.
発明の効果 以上のように本発明は、電磁弁の電源電圧を検出する電
圧検出器と、マイクロコンピュータの電源電圧を検出す
る電圧検出器と、両検出器の信号により燃焼器具の動作
を決定するマイクロコンピュータにより、人間が停電に
気付きにくいような停電に対しては、一度燃焼器具を停
止させ、停電が終わって電源が復帰するとともに自動的
に器具を再始動させることができ、使い勝手が良く、使
用者に誤動作と間違われることもない。またさらに長い
時間の停電に対しては、停電後電源が復帰しても燃焼器
具を停止させたままにしておくことがき、使用者が燃焼
器具を使用中であったことを忘れてしまっても燃焼器具
が停電後勝手に動作することがなく安全である。EFFECTS OF THE INVENTION As described above, the present invention determines the operation of the combustion appliance by the voltage detector that detects the power supply voltage of the solenoid valve, the voltage detector that detects the power supply voltage of the microcomputer, and the signals of both detectors. With a microcomputer, in the event of a power outage that makes it difficult for humans to notice the power outage, the combustion equipment can be stopped once, and the equipment can be automatically restarted as soon as the power supply is restored after the power outage. It is not mistaken by the user as a malfunction. In addition, for longer power outages, even if the power is restored after a power outage, the burner can be left stopped, even if the user forgets that the burner was in use. It is safe because the burner does not operate after power failure.
また、燃焼器具が自動的に再始動する最大停電時間はマ
イクロコンピュータの極めて少ない消費電力と、その電
源のバックアップコンデンサの容量によって決定される
ので、その容量は小さくて長い時間とることができる。Further, since the maximum power failure time when the combustion appliance is automatically restarted is determined by the extremely low power consumption of the microcomputer and the capacity of the backup capacitor of the power supply, the capacity can be small and can take a long time.
第１図は、本発明の一実施例における回路構成図、第２
図は、停電後の電磁弁とマイクロコンピュータそれぞれ
の電源電圧の変化を示す図である。 １……マイクロコンピュータ、４……電圧検出器、６…
…電磁弁、８……電圧検出器。FIG. 1 is a circuit configuration diagram in one embodiment of the present invention, FIG.
The figure shows changes in the power supply voltages of the solenoid valve and the microcomputer after a power failure. 1 ... Microcomputer, 4 ... Voltage detector, 6 ...
… Solenoid valve, 8… Voltage detector.
Claims (1)
と、前記電磁弁の電源バックアップコンデンサと、前記
電磁弁が動作するために必要な電圧を検出する電圧検出
器と、前記電磁弁の動作を制御するマイクロコンピュー
タと、前記マイクロコンピュータの電源バックアップコ
ンデンサと、前記マイクロコンピュータが正常に動作す
るために必要な電圧を検出する電圧検出器とを備え、燃
焼器具の動作中に停電が発生した時に停電時間が短く、
電磁弁の電圧検出器だけが電圧の低下を検出した場合に
は、一旦燃焼器具の動作を停止させ、停電の復帰ととも
に動作を再開させ、停電時間が長く、マイクロコンピュ
ータの電圧検出器も電圧の低下を検出した場合には、燃
焼器具の動作を完全に停止させ、停電が復帰しても動作
を再開させないように動作を決定する手段をマイクロコ
ンピュータ内に設けたことを特徴とする燃焼器具の停電
安全装置。1. A solenoid valve for controlling fuel supply to a combustion instrument, a power source backup capacitor for the solenoid valve, a voltage detector for detecting a voltage required for the solenoid valve to operate, and a solenoid valve for the solenoid valve. A microcomputer for controlling the operation, a power supply backup capacitor for the microcomputer, and a voltage detector for detecting a voltage necessary for the microcomputer to operate normally, and a power failure occurred during the operation of the combustion appliance. Sometimes power outages are short,
When only the voltage detector of the solenoid valve detects the voltage drop, the operation of the combustion equipment is temporarily stopped, the operation is restarted when the power is restored, the power failure time is long, and the voltage detector of the microcomputer also detects the voltage When a decrease is detected, the microcomputer is provided with means for determining the operation so that the operation of the combustion appliance is completely stopped and the operation is not restarted even after the power failure is restored. Blackout safety device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60248226A JPH0678815B2 (en) | 1985-11-06 | 1985-11-06 | Power failure safety device for combustion appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60248226A JPH0678815B2 (en) | 1985-11-06 | 1985-11-06 | Power failure safety device for combustion appliances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62108926A JPS62108926A (en) | 1987-05-20 |
| JPH0678815B2 true JPH0678815B2 (en) | 1994-10-05 |
Family
ID=17175049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60248226A Expired - Lifetime JPH0678815B2 (en) | 1985-11-06 | 1985-11-06 | Power failure safety device for combustion appliances |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678815B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906177A (en) * | 1989-01-03 | 1990-03-06 | R. E. Phelon Company, Inc. | Electronic controller for fluid fuel burner |
| JP2551299B2 (en) * | 1992-06-02 | 1996-11-06 | 三浦工業株式会社 | Boiler safety controller during momentary power failure |
-
1985
- 1985-11-06 JP JP60248226A patent/JPH0678815B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62108926A (en) | 1987-05-20 |
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