JPH039369B2 - - Google Patents
Info
- Publication number
- JPH039369B2 JPH039369B2 JP61254238A JP25423886A JPH039369B2 JP H039369 B2 JPH039369 B2 JP H039369B2 JP 61254238 A JP61254238 A JP 61254238A JP 25423886 A JP25423886 A JP 25423886A JP H039369 B2 JPH039369 B2 JP H039369B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- voltage
- circuit
- operation switch
- detection circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 19
- 230000007774 longterm Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F23N5/242—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
- F23N2231/00—Fail safe
- F23N2231/04—Fail safe for electrical power failures
Description
【発明の詳細な説明】
（技術分野）
本発明はマイクロコンピユータ（以下、マイコ
ンという）を使用するボイラ、風呂釜、温水暖房
器、フアンヒータ等石油燃焼器具の安全動作保持
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a device for maintaining safe operation of oil-burning appliances, such as boilers, bathtubs, hot water heaters, fan heaters, etc., using a microcomputer (hereinafter referred to as a microcomputer).
（従来技術および問題点）
一般に、石油燃焼器具には、地震等に際して火
災が発生することを防止するために安全動作を保
持する安全動作保持装置が設けられる。従来、安
全動作保持装置としては、例えば第３図に示すよ
うに、感震器１２と、これの出力を検出する停電
検出回路と共用の検出回路Ｄを有するものと、例
えば第４図に示すようにCRタイマとキープリレ
ーとを組み合わせた検出回路D′と、感震器１２
を有するものがある。(Prior Art and Problems) Generally, oil-burning appliances are provided with a safety operation maintenance device that maintains safe operation in order to prevent fire from occurring in the event of an earthquake or the like. Conventionally, safe operation maintaining devices include those having a seismic sensor 12 and a detection circuit D shared with a power failure detection circuit for detecting the output of the seismic sensor 12, as shown in FIG. 3, and one as shown in FIG. 4, for example. The detection circuit D′, which combines a CR timer and a keep relay, and the seismic sensor 12
There are some that have
しかしながら、これらの従来の安全動作保持装
置では、電源電圧等の変動により感度が変動する
と言う問題点がある上、特に、停電検出回路と共
用するものでは、瞬停検出感度とのかねあいで検
出感度の設定が困難になるという問題点がある。 However, these conventional safety operation maintenance devices have the problem that their sensitivity fluctuates due to fluctuations in power supply voltage, etc., and in particular, in devices that are shared with a power outage detection circuit, the detection sensitivity has to be lowered due to the conflict with momentary power outage detection sensitivity. There is a problem in that it is difficult to set.
（発明の目的）
本発明は上述の事情を考慮してなされたもので
あつて、簡単な構成で短時間の停電（瞬停）と長
時間の停電とを判別し、瞬停の場合には安全動作
を保持し、長時間の場合には運転スイツチの保持
をリセツトし燃焼停止するようにした安全動作保
持装置を提供することを目的とするものである。(Objective of the Invention) The present invention has been made in consideration of the above-mentioned circumstances, and has a simple configuration that distinguishes between short-term power outages (instantaneous power outages) and long-term power outages, and in the case of instantaneous power outages, It is an object of the present invention to provide a safe operation maintaining device which maintains safe operation and resets the operation switch to stop combustion if the operation continues for a long time.
（発明の構成）
本発明は、上記の目的を達成するために、電源
電圧が所定値を下回るときに運転スイツチをオフ
にリセツトするとともに電源電圧が更に低電圧の
別の所定値を下回るときに制御電源の出力をリセ
ツトさせる回路を設けたことを特徴とする石油燃
焼器具の安全動作保持装置である。(Structure of the Invention) In order to achieve the above object, the present invention resets the operation switch to OFF when the power supply voltage falls below a predetermined value, and also resets the operation switch to OFF when the power supply voltage falls below another predetermined value of a lower voltage. A device for maintaining safe operation of an oil-burning appliance is characterized by being provided with a circuit for resetting the output of a control power source.
本発明の安全動作保持装置は、部品点数を少な
くするために、１個のマイクロコンピユータ（マ
イコン）に組み込むことが好ましい。 The safe operation maintaining device of the present invention is preferably incorporated into one microcomputer in order to reduce the number of parts.
（実施例）
以下、本発明の実施例を図例に基づき具体的に
説明する。(Example) Hereinafter, an example of the present invention will be specifically described based on drawings.
図において、１はDC電源回路、２は運転スイ
ツチ、３は電源電圧検出回路、４は運転スイツチ
回路である。５〜８は抵抗、９，１０はトランジ
スタ、１１は制御電源／制御電圧検出回路、１２
は感震器、１３，１４は抵抗、１５はマイコンで
ある。 In the figure, 1 is a DC power supply circuit, 2 is an operation switch, 3 is a power supply voltage detection circuit, and 4 is an operation switch circuit. 5 to 8 are resistors, 9 and 10 are transistors, 11 is a control power supply/control voltage detection circuit, and 12
1 is a vibration sensor, 13 and 14 are resistors, and 15 is a microcomputer.
上記の構成において、DC電源回路１はAC電源
からDC電圧に変換し、コンデンサにより電圧を
V0に保持する。第１図に示す感震器１２が作動
すると抵抗１３，１４によりパルス信号が励起さ
れ、マイコン１５に入力される。このパルス信号
が所定のパルス幅を上回るパルスのパルス数が所
定値を上回る場合、あるいは、前記所定のパルス
幅よりも大きい別の所定のパルス幅を有する場合
には、安全指令がマイコン１５から出力され、マ
イコン１５によりその出力が保持される。この状
態は運転スイツチ２をオンして運転スイツチ回路
４が反転し（オフになる）抵抗５〜８を介してト
ランジスタ９，１０がオフ、制御電源／制御電圧
検出回路１１がオフになりマイコン１５がオフす
るまで保持される。 In the above configuration, DC power supply circuit 1 converts AC power to DC voltage, and converts the voltage using a capacitor.
Hold at V0. When the seismic sensor 12 shown in FIG. If the number of pulses in this pulse signal exceeding a predetermined pulse width exceeds a predetermined value, or if the pulse signal has another predetermined pulse width larger than the predetermined pulse width, a safety command is output from the microcomputer 15. The output is held by the microcomputer 15. In this state, when the operation switch 2 is turned on, the operation switch circuit 4 is inverted (turned off), the transistors 9 and 10 are turned off via the resistors 5 to 8, the control power supply/control voltage detection circuit 11 is turned off, and the microcomputer 15 is turned off. is held until turned off.
電源電圧検出回路３はDC電源の出力電圧を検
出し、この電源電圧が第２図に示す所定の基準値
（V1）になると運転スイツチ回路４がオフにリセ
ツトされる。運転スイツチ回路４はフリツプフロ
ツプで構成され、運転スイツチ２の信号により反
転する。一方、制御電源／制御電圧検出回路１１
はコンデンサーを有しており、フリツプフロツプ
が反転しトランジスタ９が非導通となつても直ち
にOFFにはならないようにしてあり、電源電圧
を制御電圧に変換し、制御電源電圧が第２図に示
す別の基準電圧（V2）相当の電圧以下になると
制御電源をオフする。 The power supply voltage detection circuit 3 detects the output voltage of the DC power supply, and when this power supply voltage reaches a predetermined reference value (V1) shown in FIG. 2, the operation switch circuit 4 is reset to OFF. The operation switch circuit 4 is composed of a flip-flop, and is inverted by the signal from the operation switch 2. On the other hand, the control power supply/control voltage detection circuit 11
has a capacitor, so that even if the flip-flop is reversed and transistor 9 becomes non-conductive, it will not turn off immediately, converting the power supply voltage to a control voltage, and converting the control power supply voltage to another voltage as shown in Figure 2. When the voltage drops below the reference voltage (V2), the control power is turned off.
感震器１２の作動をマイコンが検出した場合に
おいて、停電が発生すると第２図１に示すような
長時間停電の場合は、DC電源回路１がV0から
V1に低下すると電源電圧検出回路３が作動して
運転スイツチ回路４にリセツト信号を発し、運転
指令をオフするため全停止となる。このとき、制
御電源／制御電圧検出回路１１はV2以上の電圧
であればオンを保持している。第２図２のような
短時間停電の場合はDC電源回路１がV1に低下す
る前に復帰した時であり、電源電圧検出回路３、
制御電源／制御電圧検出回路１１共にオンを保持
するので運転指令は保持されかつマイコンは安全
動作を保持する。この安全動作は運転スイツチを
再度オンにすることによりリセツトされる。 When the microcomputer detects the operation of the seismic sensor 12 and a power outage occurs, in the case of a long power outage as shown in Fig. 2, the DC power supply circuit 1 is switched from V0 to
When the voltage drops to V1, the power supply voltage detection circuit 3 is activated and issues a reset signal to the operation switch circuit 4, which turns off the operation command and causes a complete stop. At this time, the control power supply/control voltage detection circuit 11 remains on if the voltage is equal to or higher than V2. In the case of a short power outage as shown in Fig. 2, the DC power supply circuit 1 is restored before it drops to V1, and the power supply voltage detection circuit 3
Since both the control power supply/control voltage detection circuit 11 is kept on, the operation command is kept and the microcomputer maintains safe operation. This safety operation is reset by turning the operating switch back on.
（発明の効果）
以上のように本発明によれば、安全動作後に電
源電圧が所定値まで降下するか否かによつて瞬停
か長時間の停電かを判別するので、簡単な構成で
瞬停と長時間の停電とを判別できる。更に、短時
間停電に対しては安全動作が保持されているため
運転指令をオン状態にしたままであり、安全動作
時に表示ランプを点滅するようにしておけば、安
全動作を表示ランプによつて確認できる一方、長
時間停電に対しては安全動作並びに運転指令もリ
セツトされるので、全停止されると共に表示ラン
プも消灯し長時間停電があつたことがわかる。
尚、このような安全動作保持装置は感震器の動作
に基づく作動だけでなく、他の条件による安全動
作に対しても適用できる。(Effects of the Invention) As described above, according to the present invention, an instantaneous power outage or a long power outage is determined based on whether the power supply voltage drops to a predetermined value after safe operation. It is possible to distinguish between power outages and long-term power outages. Furthermore, since safe operation is maintained in the event of a short power outage, the operation command remains on, and if the indicator lamp is set to blink during safe operation, the indicator lamp will indicate safe operation. On the other hand, in the event of a long-term power outage, the safety operation and operation commands are reset, so the system is completely shut down and the indicator lamp is also turned off, indicating that there has been a long-term power outage.
Note that such a safe operation maintaining device can be applied not only to operation based on the operation of the seismic sensor but also to safe operation based on other conditions.
第１図は本発明の実施例を示す全体図、第２図
１，２は本発明の作動説明図、第３図および第４
図は従来例を示す電気回路図である。
２……運転スイツチ、３……電源電圧検出回
路、４……運転スイツチ回路、１１……制御電
源／制御電圧検出回路、１２……感震器。
Fig. 1 is an overall view showing an embodiment of the present invention, Figs. 2 and 2 are explanatory diagrams of the operation of the present invention, and Figs.
The figure is an electric circuit diagram showing a conventional example. 2... Operation switch, 3... Power supply voltage detection circuit, 4... Operation switch circuit, 11... Control power supply/control voltage detection circuit, 12... Earthquake sensor.
Claims (1)
ツチ回路と、電源電圧が一定電圧（V1）以下の
とき前記運転スイツチ回路をOFFする電源電圧
検出回路と、制御電源電圧が特定電圧（V2）以
下になると制御電源をOFFする制御電源／制御
電圧検出回路とを有するものであつて前記一定電
圧（V1）と特定電圧（V2）との関係をV1＞V2
としたことを特徴とする石油燃焼器具の安全動作
保持装置。1. An operation switch circuit that is inverted according to the operation switch signal, a power supply voltage detection circuit that turns off the operation switch circuit when the power supply voltage is below a certain voltage (V1), and a control circuit that turns off the operation switch circuit when the control power supply voltage is below a certain voltage (V2). It has a control power supply/control voltage detection circuit that turns off the power, and the relationship between the constant voltage (V1) and the specific voltage (V2) is determined as V1>V2.
A device for maintaining safe operation of an oil-burning appliance, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61254238A JPS63108119A (en) | 1986-10-25 | 1986-10-25 | Safety operation holder for petroleum combustion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61254238A JPS63108119A (en) | 1986-10-25 | 1986-10-25 | Safety operation holder for petroleum combustion apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63108119A JPS63108119A (en) | 1988-05-13 |
| JPH039369B2 true JPH039369B2 (en) | 1991-02-08 |
Family
ID=17262189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61254238A Granted JPS63108119A (en) | 1986-10-25 | 1986-10-25 | Safety operation holder for petroleum combustion apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63108119A (en) |
-
1986
- 1986-10-25 JP JP61254238A patent/JPS63108119A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63108119A (en) | 1988-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |