JPS6172930A - Control device for combustion equipment - Google Patents

Control device for combustion equipment

Info

Publication number
JPS6172930A
JPS6172930A JP59194217A JP19421784A JPS6172930A JP S6172930 A JPS6172930 A JP S6172930A JP 59194217 A JP59194217 A JP 59194217A JP 19421784 A JP19421784 A JP 19421784A JP S6172930 A JPS6172930 A JP S6172930A
Authority
JP
Japan
Prior art keywords
microcomputer
circuit
power
power outage
signal
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
JP59194217A
Other languages
Japanese (ja)
Other versions
JPH025976B2 (en
Inventor
Yukikazu Matsuda
松田 幸和
Shigeru Murakami
茂 村上
Yoshio Asano
浅野 義雄
Chuzo Wada
和田 忠造
Shinji Kushida
慎治 櫛田
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59194217A priority Critical patent/JPS6172930A/en
Publication of JPS6172930A publication Critical patent/JPS6172930A/en
Publication of JPH025976B2 publication Critical patent/JPH025976B2/ja
Granted 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
    • F23N5/20Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00Signal processing; Details thereof
    • F23N2223/08Microprocessor; Microcomputer

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)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To provide a positive sensing of a condition in which a power interruption sensing circuit is released or troubled to the short circuited condition and prevent an erroneous operation of a micro-computer by a method wherein the number of pulse signals from a wave-form shaping circuit is counted and the power interruption is sensed. CONSTITUTION:A wave form shaping circuit comprised of a diode bridge 20 for displaying a clock to send a pulse signal to an input terminal Si of a micro- computer 11', and of a transistor 22 and a resistor 21 is utilized as a power interruption sensing circuit. That is, the pulse signal supplied from the wave form shaping circuit composed of the transistor 22 and the resistor is utilized to detect the power interruption. In case that the power interruption sensing circuit for a transistor 22 or the like is released or troubles to the short circuit, a signal to be inputted to the input terminal Si of the micro-computer 11' becomes only 'H' or 'L' signal and does not become a pulse signal. Therefore, the counted value to be counted in a step 90 is 0 per second, that is, does not exceed 10 and then the operation is stopped as the power interruption occurs.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は石油ファンヒータ等の燃焼器具の制御装置に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a combustion appliance such as a kerosene fan heater.

従来例の構成とその問題点 従来の燃焼器具、例えば石油ファンヒータは第5図に示
すように、外装置と底板2とで形成した本体内に固定タ
ンク3やバーナユニット4が設(すである。上記バーナ
ユニット4で燃焼した燃焼カスAは送風モータ51こ取
り付けられたファン6(こより室内空気Bと共にルーパ
ー7より温風Cとなって吹き出し、室内の暖房に供され
る。
Structure of conventional examples and their problems Conventional combustion appliances, such as oil fan heaters, have a fixed tank 3 and a burner unit 4 (already installed) in a main body formed by an external device and a bottom plate 2, as shown in FIG. The combustion scum A burned in the burner unit 4 is blown out from the looper 7 along with indoor air B from a fan 6 attached to a blower motor 51 as warm air C, which is used to heat the room.

第3図はこのような燃焼器の制御回路例を示す。FIG. 3 shows an example of a control circuit for such a combustor.

第3図において、交流電源8には直列に電流ヒユーズ9
が接続されており、母線aと母線すとの間には、マイク
ロコンピュータ(以下マイコンと称す)11を主体とし
た燃焼制御回路10、バーナ4に供給されtこ灯油を気
化するtこめのヒータ13とリレー12の接点12aと
の直列回路、送風モータ5とバーナ4円に燃焼用空気を
送りこむバーナモータ14との並列回路とリレー15の
接点15aとの直列回路、電源か供給さnると一定時間
tごけ動作し、電源が遮断されるとクリアされるタイマ
ー要素を内蔵した点火器16と灯油をバーナ4内の気化
室(図示せず)に供給するポンプ回路17との並列回路
とリレー18の接点18aとの直列回路がそれぞれ並列
(こ接続されている。また燃焼制御回路1oは電源トラ
ンス19にて母線a−b間に印加される交流電圧を降圧
、絶縁し、電源が供給される。上記電源トランス19の
2次側はダイオードブリッジ20の交流端子側に接続さ
れる一方、上記ダイオードブリ7ジ20の1つの交流端
子側蚤こ抵抗21を介してトランジスタ22のベースが
接続され波形整形回路を構成している。さらにトランジ
スタ22のコレクタはマイコン11の入力端子Siに接
続されている。上記タイオードブリッジ20の正極端子
側から出力される母線Cには平滑コンデンサ23、トラ
ンジスタ24で駆動されるリレー12、トランジスタ2
5で駆動されるリレー15、トランジスタ26で駆動さ
れるリレー18、表示回路27、停電検出回路28がそ
nぞれ並列に接続さnた後、直流安定化電源29の入力
端子側(こ接続されている。
In FIG. 3, a current fuse 9 is connected in series to the AC power source 8.
A combustion control circuit 10 mainly includes a microcomputer (hereinafter referred to as microcomputer) 11, and a heater for vaporizing kerosene supplied to the burner 4 is connected between the bus bar a and the bus bar. 13 and the contact 12a of the relay 12, a parallel circuit with the blower motor 5 and the burner motor 14 that sends combustion air to the burner 4, and a series circuit with the contact 15a of the relay 15, which is constant when the power is supplied. A parallel circuit and relay between an igniter 16 that operates for a time t and has a built-in timer element that is cleared when the power is cut off, and a pump circuit 17 that supplies kerosene to the vaporization chamber (not shown) in the burner 4. The series circuits with the contacts 18a of 18 are connected in parallel.The combustion control circuit 1o uses a power transformer 19 to step down and insulate the AC voltage applied between the bus bars a and b, and is supplied with power. The secondary side of the power transformer 19 is connected to the AC terminal side of the diode bridge 20, while the base of the transistor 22 is connected via a resistor 21 on the AC terminal side of one of the diode bridges 20. A waveform shaping circuit is configured.Furthermore, the collector of the transistor 22 is connected to the input terminal Si of the microcomputer 11.A smoothing capacitor 23 and a transistor 24 are connected to the bus line C output from the positive terminal side of the diode bridge 20. Relay 12, transistor 2 driven by
After the relay 15 driven by the transistor 5, the relay 18 driven by the transistor 26, the display circuit 27, and the power failure detection circuit 28 are connected in parallel, the input terminal side of the DC stabilized power supply 29 (this connection has been done.

上記直流安定化電源29の出力側は、停電時の電流逆流
防止用タイオード30を介して、停電時にマイコン11
.こ電源を供給する補助電源(以下、バックアップ電源
と称す)31の母線dとなっている。母線dの一端に接
続されるバックアップ電源31は、電流制限用の抵抗3
2と大容量コンデンサ33,34.35の直列回路から
構成されている。母線dに連ならる一負荷であるスイッ
チ回路36は、運転のON、OFFを行なう運転スイッ
チ37と、固定タンク内の灯油残量を検出し一定量以下
となると開動する給油スイッチ38と、固定タンク円の
底に蓄まる水量を検出し、一定量以上になると開動する
水スイッチ39と、地震等の振動があると開動する対震
スイッチ40のそれぞれのON、OFF状況を、マイコ
ノ11の入力端子KO,Klに出力すへ〈信号線e、 
 fを介してマイコン11に接続されている。またマイ
コン11の入力端子に2には燃焼の着火・失火等の状況
を検出するフレ−ムロ7ド回路41が接続さnており、
入力端子A/Dには上記ヒータ13で加熱されfコハー
ナ4内の気化部の温度を検出するバーナサーミスタ42
と抵抗43との接続点が接続され、その接続点の電位が
入力されるようになっている。44は時計表示器で、マ
イコン11の入力端子Si に入力される波形整形回路
からのパルス(クロック)の数をマイコン111こて計
数して時間表示に変換されている。
The output side of the DC stabilized power supply 29 is connected to the microcomputer 11 during a power outage via a diode 30 for preventing current backflow during a power outage.
.. This serves as a bus line d of an auxiliary power source (hereinafter referred to as a backup power source) 31 that supplies this power. A backup power supply 31 connected to one end of the bus d has a current limiting resistor 3.
2 and large-capacity capacitors 33, 34, and 35 in series. The switch circuit 36, which is one load connected to the bus line d, includes an operation switch 37 that turns the operation ON and OFF, a refueling switch 38 that detects the remaining amount of kerosene in the fixed tank and opens when the amount is below a certain level, and a fixed The water switch 39, which detects the amount of water accumulated at the bottom of the tank circle and opens when the amount exceeds a certain level, and the anti-seismic switch 40, which opens when there is vibration such as an earthquake, are input into the micon 11. Output to terminals KO and Kl (signal line e,
It is connected to the microcomputer 11 via f. Further, a frame load circuit 41 is connected to the input terminal 2 of the microcomputer 11 for detecting conditions such as ignition and misfire of combustion.
A burner thermistor 42 which is heated by the heater 13 and detects the temperature of the vaporized part in the f-cohaner 4 is connected to the input terminal A/D.
A connection point between the resistor 43 and the resistor 43 is connected, and the potential at the connection point is input. Reference numeral 44 denotes a clock display, and the number of pulses (clocks) from the waveform shaping circuit inputted to the input terminal Si of the microcomputer 11 is counted by the microcomputer 111 and converted into a time display.

上記構成において次に動作説明を行なう。まずコンセン
トが挿入され交流電源18が供給されると制御回路10
に通電され、マイコン11は基準発振器45で定められ
る一定の周波数を適切な周波数に分周し、上記分周され
tこ周波数警こ従いあらかしめ定められ1こ一定の手順
を示すプログラムを最初から1ステツプつつ規則正しく
実行を開始する。その動作を第4図に示すフローチャー
トに基づいて説明する。
Next, the operation of the above configuration will be explained. First, when the outlet is inserted and AC power 18 is supplied, the control circuit 10
The microcomputer 11 divides the constant frequency determined by the reference oscillator 45 into an appropriate frequency, and runs a program from the beginning that shows a certain procedure according to the frequency of the divided frequency. Start execution in regular steps. The operation will be explained based on the flowchart shown in FIG.

まずマイコン11の内部タイマー6、すなわちプログラ
ムの内容に左右されず、プログラムの命令が1つ実行さ
nる毎)こカウントtiを1つ増加するタイマーの動作
をステップ8oで開始させる。次にステップ81は第1
カウノタの値を検査し、上記第1カウンタの値が500
の値を示していると流れ(イ)に進み、さもな(すれは
流れ(ロ)に進むように分枝する作業を行なう。第1カ
ウンタは後述するが2ms毎にその値が1つつつ増加す
るまうに定められており、第1カウンタの値が500と
いうことは1秒に1回の割合で流れげ)を進むことにな
る。
First, in step 8o, the operation of the internal timer 6 of the microcomputer 11, that is, the timer that increases the count ti by one each time one command of the program is executed, regardless of the contents of the program, is started. Next, step 81 is the first
The value of the counter is checked and the value of the first counter is 500.
If the value is indicated, the process proceeds to flow (a), otherwise it branches to flow (b).As will be described later, the value of the first counter increases by one every 2 ms. The value of the first counter is 500, which means that the value of the first counter increases at a rate of once per second.

流れ(イ)(こは交流電源8の周波数を判定する処理群
があり、ステップ9Qは後述するステップ85の作業の
結果蓄積された第2カウンタの値を検査するもので、第
2カウンタの値が55より大いか小さいかにより、60
HM処理を行なうステップ91かあるいは50 Hz処
理を行なうステップ92が選択される。ステ7ブ93は
、第1.第2カウンタの値を初期値に戻す作業を行なう
。流れ(−f)と流れ(ロ)の合流点(こ続くステップ
82は、上記内部タイマーの値を検査する作業を行ない
、上記内部タイマーの値が2msの値を示すまでステノ
プ82を繰り返し、2msになると流れ(ハ)に進む。
Flow (A) (This includes a processing group that determines the frequency of the AC power supply 8. Step 9Q is for checking the value of the second counter accumulated as a result of the work in step 85, which will be described later. 60 depending on whether it is greater or less than 55
Either step 91 for performing HM processing or step 92 for performing 50 Hz processing is selected. The step 7 block 93 is the first. Work is performed to return the value of the second counter to its initial value. The confluence of the flow (-f) and the flow (b) (The following step 82 performs the work of checking the value of the internal timer, and repeats the step 82 until the value of the internal timer shows a value of 2 ms. Then, proceed to flow (c).

すなわち流れ(ハ)をこ続くステップ83は2ms毎に
処理される。上記ステップ83は第1カウンタの値を1
つ増加させる作業を行なう。ステップ84は上記内部タ
イマーの値を初期値に戻す作業を行なう。ステップ85
はマイコン11の入力端子S1に入力されるパルス(ク
ロック)、すなわら入力信号が4“Hl’lから′L″
に、u L I+からt+ H、uに変化したことを検
出し、1パルス(クロック)毎(こ上記第2カウンタの
値を1つ増加する作業を行なう。ステップ86は入力端
子に3の入力をこよって停電か否かを検出するbので、
母線Cに電力が供給されていると入力端子に3には“′
H゛′信号が、停電)こなると°“L ++倍信号入力
され、この入力端子に3への入力状況を検査する。そし
て停電時には流れに)に進み、ステップ87で運転停止
作業を行ない1、ステップ88で運転ランプ27aを消
灯し、リセットランプ27bを点灯するとと6に、停電
復帰時に自動的に再運転しないよう処理する異常時の作
業を行なう。まtコ停電していない場合は流れ(ホ)の
ステップ89へと進み、通常の運転時に実行される一連
の処理を行なう。丁なわら運転スインチ37が投入され
ると、運転ランプ27aが点灯すると同時にリレー12
が励磁され、ヒータ13に通電する。そしてバーナサー
ミスタ42にてバーナ4内の気化部の温度が所定温度ま
で上昇したと検出すると、リレー15を励磁してバーナ
モータ14と送風モータ15をONする。
That is, step 83 following flow (c) is processed every 2 ms. The above step 83 sets the value of the first counter to 1.
Do the work to increase the number by 1. In step 84, the value of the internal timer is returned to its initial value. Step 85
is the pulse (clock) input to the input terminal S1 of the microcomputer 11, that is, the input signal is 4"Hl'l to 'L"
, detects that the value has changed from u L I+ to t+ H, u, and increases the value of the second counter by 1 every pulse (clock). Step 86 is performed by inputting 3 to the input terminal. Since it detects whether there is a power outage or not through
When power is supplied to bus C, input terminal 3 shows "'"
When the H' signal is turned off (power outage), the °'L ++ signal is input, and the input status to 3 is checked at this input terminal.Then, in the event of a power outage, the process proceeds to step 87, where the operation is stopped. In step 88, the operation lamp 27a is turned off and the reset lamp 27b is turned on. In step 6, an abnormality operation is performed to prevent automatic restart of operation when the power is restored.If there is no power outage, the process continues. Proceeding to step 89 (e), a series of processes executed during normal operation are performed.When the operation switch 37 is turned on, the operation lamp 27a lights up and at the same time the relay 12
is excited, and the heater 13 is energized. When the burner thermistor 42 detects that the temperature of the vaporization part within the burner 4 has risen to a predetermined temperature, the relay 15 is energized to turn on the burner motor 14 and the blower motor 15.

一定時間後、リレー18を励磁して、ポンプ回路17と
点火器16をONする。点火器16は通電後一定時間放
電動作し、その後自動的に停止する。
After a certain period of time, the relay 18 is energized and the pump circuit 17 and igniter 16 are turned on. The igniter 16 discharges electricity for a certain period of time after being energized, and then automatically stops.

ここで着火状態をフレームロンド回路41で検出して、
不着火の場合は再度着火動作を行なっtコりあるいは異
常と判断して運転を停止したりする。
Here, the ignition state is detected by the flame rond circuit 41,
If there is no ignition, the ignition operation is performed again, and it is determined that there is a failure or abnormality, and the operation is stopped.

一方停電時)こは、母線Cからの電力供給が遮断される
が停電検出回路28から信号が入るとバックアンプ電源
31から母線dに電力が供給され、マイコン11は、記
憶保持を続けると共に、マイコノ11及び周辺の回路が
消費する電流を極力少なくしてバックアップ出来る時間
がなるべく長くなるように各入出力端子の状態を設定す
る。さら)こ、燃焼途中で停電があった場合、停電復帰
時に、停電前の続きの動作を行なうと、ポンプ回路17
が再iM電と同時に動作開始するので、油モレ、爆発着
火等の恐れがあり、非常に危険である。そこで停電検出
回路28は停電を検出しマイコン11に停電信号を与え
ることで、再通電時に危険な状態すこなるのを防ぐよう
に働きかける。
On the other hand, during a power outage), the power supply from the bus C is cut off, but when a signal is received from the power outage detection circuit 28, power is supplied from the back amplifier power supply 31 to the bus D, and the microcomputer 11 continues to retain memory and The state of each input/output terminal is set so that the current consumed by the microcontroller 11 and peripheral circuits is minimized and the backup time is extended as much as possible. Furthermore, if there is a power outage during combustion, when the power is restored, if the operation continued from before the power outage, the pump circuit 17
Since it starts operating at the same time as the iM electric, there is a risk of oil leakage, explosion, and ignition, which is extremely dangerous. Therefore, the power outage detection circuit 28 detects a power outage and provides a power outage signal to the microcomputer 11, thereby working to prevent a dangerous situation from occurring when the power is turned on again.

ここで上記停電検出は次のようにして行なわれている。Here, the above-mentioned power failure detection is performed as follows.

すなわちこの回路では母線Cから電流が供給されている
間この電流は抵抗28b、ツェナーダイオード28aを
介してトランジスタ28cのベース(こ流れ込みトラン
ジスタ28 c ’e ON L/ている。しかしなが
ら停電になってバックアップ電源31から供給さnる母
線Cの電位がツェナーダイオード28aのツェナー電圧
より低くなると、トランジスタ28cのベースに電流が
流れなくなり、トランジスタ28Cは0FFL、入力端
子に3fこは“HI+の信号が入力され、ステップ86
で停電と検出さnる。
That is, in this circuit, while current is supplied from the bus C, this current flows into the base of the transistor 28c via the resistor 28b and the Zener diode 28a. When the potential of the bus line C supplied from the power supply 31 becomes lower than the Zener voltage of the Zener diode 28a, no current flows to the base of the transistor 28c, and the transistor 28C becomes 0FFL, and a "HI+" signal is input to the input terminal. , step 86
A power outage is detected.

しかしながら、上記回路は入力端子に3に入力される信
号が“H″′か′L″で停電か否かを判断する為、たと
えば、トランジスタ28cのコレクターエミッタ間の短
絡不良、あるいは入力端子に3のプルアップ抵抗28c
lの断線不良等の時(こは、停電が発生してもマイコン
11は停電検出せず、誤動作するという問題がある。
However, since the above circuit judges whether there is a power outage or not when the signal input to the input terminal 3 is "H'' or 'L," for example, a short-circuit failure between the collector emitter of the transistor 28c or a pull-up resistor 28c
When there is a disconnection failure in the microcomputer 11 (in this case, even if a power outage occurs, the microcomputer 11 does not detect the power outage and malfunctions).

発明の目的 本発明は上記問題点に鑑みてなしたもので、停電検出回
路が開放もしくは短絡側に故障した場合でもこれを確実
船こ逆出してマイコンが誤動作し4fいまうにすること
を目的としたものである。
Purpose of the Invention The present invention was made in view of the above-mentioned problems, and its purpose is to ensure that even if the power failure detection circuit fails on the open or short-circuit side, the ship will be redirected and the microcomputer will malfunction, resulting in 4f. This is what I did.

発明の構成 本発明は上記目的を達成するため停電検出回路として波
形整形回路を用いるとともfこ、マイコン)こまって上
記波形整形回路からのパルス信号の数を計数し、この計
数値か一定値以下なら停電と判断して燃焼停止動作を行
なうように構成してあり、停電検出回路である波形整形
回路が故障しfコ場合には波形整形回路からのパルス信
号がなくなるので確実にこれを検出することができる。
Structure of the Invention In order to achieve the above object, the present invention uses a waveform shaping circuit as a power failure detection circuit, and also counts the number of pulse signals from the waveform shaping circuit (microcontroller), and calculates the number of pulse signals from the waveform shaping circuit to a constant value. If the following occurs, it is determined that there is a power outage and combustion is stopped.If the waveform shaping circuit, which is the power failure detection circuit, fails, there will be no pulse signal from the waveform shaping circuit, so this can be detected reliably. can do.

実施例の説明 以下その一実施例を第1図、第2図を用いて説明するが
、従来例と同一部分は同一の番号を附記して説明を省略
し、異なる部分のみ説明する。
DESCRIPTION OF THE EMBODIMENTS One embodiment will be described below with reference to FIGS. 1 and 2. Parts that are the same as those of the conventional example will be given the same numbers and their explanation will be omitted, and only the different parts will be explained.

まず第1図において、従来の停電検出回路28は削除し
、マイコン11′の入力端子Siにパルス(クロック)
信号を送る時計表示用のダイオードブリッジ2oならび
にトランジスタ22と抵抗21とからなる波形整形回路
を停電検出回路として利用している。すなわちトランジ
スタ22と抵抗との波形整形回路から供給されるパルス
(クロック)信号を利用して停電を検出するようになっ
ており、そのためにマイコン11の処理ルーチンは第2
図のように構成しである。
First, in FIG. 1, the conventional power failure detection circuit 28 is deleted, and a pulse (clock) is applied to the input terminal Si of the microcomputer 11'.
A diode bridge 2o for sending a signal and a clock display, and a waveform shaping circuit consisting of a transistor 22 and a resistor 21 are used as a power failure detection circuit. In other words, a power outage is detected using a pulse (clock) signal supplied from a waveform shaping circuit made up of a transistor 22 and a resistor.
It is configured as shown in the figure.

第2図において、ステップ81とステップ9゜との間に
は新たにステップ96を設け、このステップ96で1秒
間にステップ85かカウントするパルス(クロック)数
をチェックして、その値が所定値、例えば本実施例では
10以上か杏かを判断させ、10以下であれは停電処理
ステップ96に進ませるようになっている。そして停電
処理ステップ96は停電信号を発生する。86aはこの
停電信号の有無を検出して停電か否かを判断する停電検
知ステップで、停電時には運転停止ステップ87へ、停
電していない時は運転処理ステップ89へと進ませる。
In FIG. 2, a new step 96 is provided between step 81 and step 9°, and in this step 96, the number of pulses (clocks) counted in step 85 per second is checked, and the value is determined to be a predetermined value. For example, in this embodiment, it is determined whether it is 10 or more or apricot, and if it is 10 or less, the process proceeds to power outage processing step 96. A power outage processing step 96 then generates a power outage signal. Reference numeral 86a denotes a power outage detection step that detects the presence or absence of this power outage signal and determines whether or not there is a power outage.When there is a power outage, the process proceeds to an operation stop step 87, and when there is no power outage, the process proceeds to an operation processing step 89.

上記構成(こおいて、通常はマイコン11の入力端子S
1にトランジスタ22からパルス(クロック〕信号が供
給されており、ステップ90でカウントする第2カウノ
タのカウント値は1秒間(こ10以上となり、正常な処
理ルーチンを行なう。
The above configuration (in this case, normally the input terminal S of the microcomputer 11
1 is supplied with a pulse (clock) signal from the transistor 22, and the count value of the second counter counted in step 90 is 1 second (10 or more), and a normal processing routine is performed.

この状態で停電(こなるとマイコン11)こはバックア
ップ電源31から給電されるが、停電検出回路を兼ねる
波形整形回路のトランジスタ22;こjよ給電されず、
マイコン11の入力端子Siにはパルス(クロック)信
号が入ら・τくなる。しfこがって当然ステップ9oで
カウント下る第2カウンタ値が1秒間にOlすなわち1
oを越えることがなくなり、流(へ)へと進む。下なわ
ら停電処理ステップ94が停電信号を発し、ステップ8
6aでこの停電信号を検出して運転停止ルーチンに入り
、運転停止する。
In this state, power is supplied from the backup power supply 31 to the power outage (when the microcomputer 11 occurs), but the transistor 22 of the waveform shaping circuit, which also serves as the power failure detection circuit, is not supplied with power.
When a pulse (clock) signal is input to the input terminal Si of the microcomputer 11, the signal becomes τ. Naturally, the second counter value that counts down in step 9o becomes Ol, that is, 1 per second.
It no longer exceeds o, and progresses to flow. A power outage processing step 94 issues a power outage signal, and step 8
At step 6a, this power outage signal is detected, the operation stops routine is entered, and the operation is stopped.

一万、停電で4はないがトランジスタ22等の停電検出
回路が開放あるいは短絡側(こ故障した場合には、トラ
ンジスタ22からマイコン11の入力端子Si fこ入
力される信号は°“H11あるいは“L +1信号のみ
となってパルス(クロック)信号ではなくなる。したが
ってこの場合もステ7プ90でカウントするカウント値
が1秒間に0、すなわち10を越えることがなくなり、
前述した場合と同様停電であるとして運転を停止する。
10,000, there is no 4 due to a power outage, but if the power outage detection circuit such as the transistor 22 is open or shorted (if this fails, the signal input from the transistor 22 to the input terminal Si of the microcomputer 11 will be "H11" or " It becomes only the L+1 signal and is no longer a pulse (clock) signal.Therefore, in this case as well, the count value counted in step 90 will not exceed 0, that is, 10 per second.
As in the case described above, it is assumed that there is a power outage and the operation is stopped.

このl・ラノンスタ22等が故障した場合は実際には停
電していなくても停電する前にステップ136aで停電
と判断して運転を停止するが、これはトランジスタ22
等が時計回路としても働いていて、それが故障するとマ
イコン11′で表示する時計が狂う等のことから停電と
見做して運転を停止させるようにしfこ6のであり、信
頼性を同上させる6のである。
If this l-lanon star 22 etc. is out of order, it is determined that a power outage has occurred and the operation is stopped in step 136a before the power outage occurs, even if there is not actually a power outage.
etc. also function as a clock circuit, and if this breaks down, the clock displayed by the microcomputer 11' will go awry, so it is assumed that there is a power outage and the operation is stopped.This also reduces reliability. It is 6.

また本実施例では時計回路となる波形整形回路からのパ
ルス(クロック〕信号を用いて停電検出、換言すれは停
電検出用のパルス(クロック〕信号と時計表示用のパル
ス(クロック)信号とを共用しているから、マイコン1
1へのパルス(クロック〕信号の入力端子も共用するこ
とができ、マイコンの入出力端子を有効に活用できる利
点らある。
In addition, in this embodiment, a power outage is detected using a pulse (clock) signal from a waveform shaping circuit that serves as a clock circuit, in other words, the pulse (clock) signal for power outage detection and the pulse (clock) signal for clock display are shared. Because it is, microcontroller 1
The input terminal for the pulse (clock) signal to 1 can also be shared, which has the advantage of making effective use of the input/output terminals of the microcomputer.

すなわちマイコンを主体とし1こ制御回路10は、種々
の信号のほとんどがマイコン11を経由する為、マイコ
ン11′;こ入出力する信号線の数はとうしても増加す
る;項向かある。しかし、マイコン11の入出力端子数
は限られており、不足する場合、スイ/チ回路36のよ
うに、周辺の人出力部とマイコンとの開信号を変換する
高価なインターフェース等が必要となってくるっその為
マイコ/11への入出力信号は出来るた゛(す共用化す
るのが好ましく、本実施例(こまればマイコン11の入
力端子が1個少なくて済む利点がある。
That is, in the single control circuit 10 which is mainly composed of a microcomputer, since most of the various signals pass through the microcomputer 11, the number of signal lines input and output from the microcomputer 11' inevitably increases. However, the number of input/output terminals of the microcomputer 11 is limited, and if there is a shortage, an expensive interface, such as a switch/chip circuit 36, is required to convert the open signal between the peripheral human output section and the microcomputer. Therefore, it is preferable to share the input/output signals to the microcomputer 11 as much as possible, and this embodiment has the advantage that the microcomputer 11 requires one less input terminal.

なお上記構成)こおいて、第2カウンタの値で停電と判
断する値は0〜50までの頃ならいくらでらさしつかえ
なく、本実施例では、ノイズ耐量を考慮して実験的に1
0と決めたのである。
Note that in the above configuration, the value of the second counter for determining a power outage can be any value between 0 and 50, and in this embodiment, it is experimentally set to 1 in consideration of noise tolerance.
It was decided to be 0.

発明の効果 上記実施例の説明で明らかなまうに本発明によれば、電
圧の低下を検出して停電を検出するのではなく、交流電
源を半波整流して得られるパルス(クロック)の数を計
数して停電を検出する為、停電検出回路が開放不良、短
絡不良のどちらになっても必ず異常を検出出来安全であ
る。しかも、実施例の如く時計用のクロックを得る入力
端子S1 と共用の入力端子を使用するようにすれはマ
イコンの使用入出力端子数を減らすことが出来、余った
入出力端子は他の機能(こ流用することが出来るという
効果が得られる。
Effects of the Invention As is clear from the description of the above embodiments, according to the present invention, power outage is not detected by detecting a drop in voltage, but by detecting the number of pulses (clocks) obtained by half-wave rectifying the AC power supply. Since the power outage is detected by counting the power outage, it is safe because the power outage detection circuit can always detect an abnormality, whether it is an open failure or a short circuit failure. Moreover, by using the input terminal shared with the input terminal S1 for obtaining the clock as in the embodiment, the number of input/output terminals used on the microcontroller can be reduced, and the remaining input/output terminals can be used for other functions ( This has the advantage that it can be reused.

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

第1図は本発明の一実施例(こお(する燃焼器具の制砥
回路図、第2図は同動作を説明するためのフローチャー
ト、第3図は従来の制御回路図、第4t2: 、′:9
動作説明用のノローチν一ト、A 5 ’A fζ一般
的fI″忽説器具の断面図である。 8  交流電源、10  燃焼制御回路、1トマイクロ
コンピュータ、20,21.22波形整形回路、31 
 補助(バックアップ)電源。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第4
図 5P25図
Fig. 1 is an abrasive circuit diagram of a combustion appliance according to an embodiment of the present invention; Fig. 2 is a flowchart for explaining the same operation; Fig. 3 is a conventional control circuit diagram; ':9
It is a sectional view of a general fI'' model device for explaining the operation. 8 AC power supply, 10 Combustion control circuit, 1 Microcomputer, 20, 21, 22 Waveform shaping circuit, 31
Auxiliary (backup) power supply. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 5P25

Claims (2)

【特許請求の範囲】[Claims] (1)マイクロコンピュータを主体とした燃焼制御回路
と、停電時に上記マイクロコンピュータに電力を供給す
る補助電源と、交流電源からパルス信号を発生させる波
形整形回路とを備え、上記マイクロコンピュータは一定
期間内に上記波形整形回路から出力されるパルス信号の
数を計数し、この計数値が一定値以下なら停電と判断し
て燃焼停止動作を行なうように構成した燃焼器具の制御
装置。
(1) Equipped with a combustion control circuit mainly composed of a microcomputer, an auxiliary power supply that supplies power to the microcomputer in the event of a power outage, and a waveform shaping circuit that generates pulse signals from an AC power supply, A control device for a combustion appliance configured to count the number of pulse signals outputted from the waveform shaping circuit and to determine that a power outage has occurred if the counted value is below a certain value and perform a combustion stop operation.
(2)交流電源から得られるパルス数を基に時刻を計測
する時計機能を備え、上記時計用のパルスを入力するマ
イクロコンピュータの入力端子と、停電検出用のパルス
を入力するマイクロコンピュータの入力端子を共用した
特許請求の範囲第1項記載の燃焼器具の制御装置。
(2) An input terminal of a microcomputer that has a clock function that measures time based on the number of pulses obtained from an AC power supply, and that inputs the pulses for the clock, and an input terminal of the microcomputer that inputs pulses for power failure detection. A control device for a combustion appliance according to claim 1, which shares the following.
JP59194217A 1984-09-17 1984-09-17 Control device for combustion equipment Granted JPS6172930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59194217A JPS6172930A (en) 1984-09-17 1984-09-17 Control device for combustion equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59194217A JPS6172930A (en) 1984-09-17 1984-09-17 Control device for combustion equipment

Publications (2)

Publication Number Publication Date
JPS6172930A true JPS6172930A (en) 1986-04-15
JPH025976B2 JPH025976B2 (en) 1990-02-06

Family

ID=16320898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59194217A Granted JPS6172930A (en) 1984-09-17 1984-09-17 Control device for combustion equipment

Country Status (1)

Country Link
JP (1) JPS6172930A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6460206A (en) * 1987-08-28 1989-03-07 Hitachi Ltd Service interruption detecting controller for ac electric rolling stock
JP2017048989A (en) * 2015-09-04 2017-03-09 株式会社長府製作所 Combustion device and combustion control device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51151581A (en) * 1975-06-20 1976-12-27 Casio Comput Co Ltd Detection method of stop page of electric current
JPS5362635U (en) * 1976-10-29 1978-05-27
JPS5478532A (en) * 1977-12-02 1979-06-22 Matsushita Electric Ind Co Ltd Controller for hot-wind blower
JPS54120425A (en) * 1978-03-09 1979-09-19 Matsushita Electric Ind Co Ltd Control system of combustion device
JPS5673678A (en) * 1979-11-16 1981-06-18 Nippon Asbestos Co Ltd Construction of electric wave absorbing wall body
JPS56147092A (en) * 1980-04-18 1981-11-14 Hitachi Ltd Watch processing method using microcomputer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51151581A (en) * 1975-06-20 1976-12-27 Casio Comput Co Ltd Detection method of stop page of electric current
JPS5362635U (en) * 1976-10-29 1978-05-27
JPS5478532A (en) * 1977-12-02 1979-06-22 Matsushita Electric Ind Co Ltd Controller for hot-wind blower
JPS54120425A (en) * 1978-03-09 1979-09-19 Matsushita Electric Ind Co Ltd Control system of combustion device
JPS5673678A (en) * 1979-11-16 1981-06-18 Nippon Asbestos Co Ltd Construction of electric wave absorbing wall body
JPS56147092A (en) * 1980-04-18 1981-11-14 Hitachi Ltd Watch processing method using microcomputer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6460206A (en) * 1987-08-28 1989-03-07 Hitachi Ltd Service interruption detecting controller for ac electric rolling stock
JP2017048989A (en) * 2015-09-04 2017-03-09 株式会社長府製作所 Combustion device and combustion control device

Also Published As

Publication number Publication date
JPH025976B2 (en) 1990-02-06

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