JPS60243438A - Controlling circuit of air conditioner - Google Patents

Abstract

PURPOSE:To enable deviation of the rotational frequency of a blower to be absorbed, by providing a controlling circuit for finely controlling the rotational frequency of the blower. CONSTITUTION:In the controlling circuit for the air conditioner which controls the rotational frequency of the blower by a microcomputer incorporating a ROM as a memory, when a power source 1 is thrown in, an FM2 is rotated by supplying electric power thereto through terminals T2, T1 of a thyristor 7. A central controlling circuit 9 outputs a firing angle controlling signal based on a command from the microcomputer to control the firing angle of a firing signal from a gate circuit 8, whereby the wave form of the electric power supplied to the FM2 is controlled, and the rotation of the FM2 is controlled. Where scatter or the like of the products of FM2 is generated, a variable resistance circuit 10 is operated to vary the resistance, whereby the firing angle controlling signal from the circuit 9 is varied, and the firing angle of the firing signal sent from the circuit 8 to a terminal G of the thyristor 7 is varied. Accordingly, the wave form of the power supplied to the FM2 is slightly varied, whereby the rotational frequency of the FM2 is finely controlled.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、書き換え不能なＲＯＭをメモリとしたマイク
ロコンピュータを有し、このマイクロコンピュータで送
風機の回転数を制御するようにした空気調和機の制御回
路に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is directed to the control of an air conditioner, which has a microcomputer whose memory is a non-rewritable ROM, and which controls the rotational speed of a blower using the microcomputer. It is related to circuits.

〔発明の背景〕[Background of the invention]

従来、空気調和機の送風機の回転数側脚には、第１図に
示すように、送風機モータ（以下、ＦＭと略記する）２
にいくつかのタップを出しておき、このタップと交流電
源１間にリレー等のスイッチ素子３〜５を設け、これを
選択切換する方法と、第２図１で示すように、２Ｍ２と
交流電源１間に３端子双方向サイリスタ（トライアック
ニ商品名）７を設け、その点弧角を制御する方法とがあ
る。なお、第２図中６は交流リアクトルである。Conventionally, as shown in FIG. 1, a blower motor (hereinafter abbreviated as FM) 2 is installed on the rotation speed side leg of the blower of an air conditioner.
2M2 and the AC power supply 1, as shown in Fig. 2. There is a method in which a three-terminal bidirectional thyristor (Triacni product name) 7 is provided between the two terminals and the firing angle thereof is controlled. Note that 6 in FIG. 2 is an AC reactor.

しかしながら第１図に示した制御回路では、２Ｍ２にタ
ングを設けるために、２Ｍ２を一旦製作した後はその回
転数の変更は容易でなく、まだその費用も多くなる。こ
のため設計等の開発時において２Ｍ２の容量や用途別に
詳細な検討を必要とし、開発に長期間を要する等の欠点
があった。However, in the control circuit shown in FIG. 1, since the tongue is provided on the 2M2, it is not easy to change the rotation speed of the 2M2 once it is manufactured, and the cost is still high. Therefore, at the time of design and development, detailed consideration must be made for each 2M2 capacity and application, resulting in drawbacks such as a long period of time required for development.

′！、た、第２図に示した制御回路では、ザイリスタ７
の点弧角をマイクロコンピュタ（図示せず）で制御する
ため上述したような開発時の検討は比較的少なくて済む
が、上記マイクロコンピュータのメモリを、マスク化し
た書き換え不能なＲＯＭを用いた場合、やはり回転数の
変更が困難となる。このため、接続される２Ｍ２の容量
が変わった場合や２Ｍ２の量産時でのばらつき等で回転
数にばらつきを生じた場合に、何ら対処できないという
欠点があった 〔発明の目的〕 本発明は上記のような欠点を除去するためになされたも
ので、開発に長期間を要さず、またＦＭ回転数のばらつ
きを生じた場合に、その調整が可能な仝電調オロ機の制
御回路を提供することを目的とする。′! , In the control circuit shown in FIG.
Since the firing angle of the microcomputer (not shown) is controlled by a microcomputer (not shown), the above-mentioned consideration at the time of development is relatively small. , it is still difficult to change the rotation speed. For this reason, there is a drawback that it is impossible to deal with variations in the rotation speed due to changes in the capacity of the connected 2M2 or variations in mass production of the 2M2.[Object of the Invention] This was done to eliminate the drawbacks such as: It does not require a long period of time to develop, and it provides a control circuit for a low-voltage oscillator machine that can adjust the FM rotation speed when it varies. The purpose is to

〔発明の概要〕[Summary of the invention]

本発明は、書き換え不能なＲＯＭをメモリとしたマイク
ロコンピュータを有し、このマイクロコンピュータで送
風機の回転数を制御するようにした全紙調オロ機の制御
回路において、前記送風機の回転数を微調整する回転数
微調整回路を設け、送風機回転数のばらつきを吸収でき
るようにしたものである。The present invention provides a control circuit for an all-paper style blower machine, which has a microcomputer with a non-rewritable ROM as memory, and in which the microcomputer controls the rotational speed of a blower, in which the rotational speed of the blower is finely adjusted. A rotation speed fine adjustment circuit is provided to absorb variations in the fan rotation speed.

〔発明の実施例〕[Embodiments of the invention]

以下第３図および第４図を参照して本発明の実施例を説
明する。第３図は本発明による全紙調和機の制御回路の
一実施例を示す回路図で、図中１は交ｍ、電源、２は送
風機モータ（ＦＭ）である。Embodiments of the present invention will be described below with reference to FIGS. 3 and 4. FIG. 3 is a circuit diagram showing an embodiment of the control circuit for the all-paper harmonizer according to the present invention, in which 1 is an AC power supply, and 2 is a blower motor (FM).

この７Ｍ２は、一端が交流リアクトル６を介して交流電
源１の電力の′電極に、他端が３端子双方向サイリスタ
７のＴ２．Ｔ、端子間を介して交流電源１の他力の電極
に、各々接続される。This 7M2 has one end connected to the electrode of the AC power source 1 via the AC reactor 6, and the other end connected to the T2. T and are respectively connected to the other power electrodes of the AC power source 1 via the terminals.

８は上記サイリスタ７のＧ端子に点弧信号を供給するゲ
ート回路、９は誉き換え不能なＲＯＭをメモリとしたマ
イクロコンピュータで主構成をなす中央側（財）回路で
、前記ゲート回路８に点弧角制御信号を送出する。１０
は回転数微調整回路、ここでは可変抵抗回路で、この抵
抗値を変えると、中央制御回路９はその変化を受けて送
出する点弧角制御信号を変化させ、ゲート回路８から出
力される点弧信号の点弧角を変えてＦＭ２０回転数を変
化させるものである。8 is a gate circuit that supplies an ignition signal to the G terminal of the thyristor 7; 9 is a central circuit mainly composed of a microcomputer whose memory is an irreplaceable ROM; Sends firing angle control signal. 10
is a rotation speed fine adjustment circuit, here a variable resistance circuit, and when this resistance value is changed, the central control circuit 9 changes the firing angle control signal sent out in response to the change, and the point output from the gate circuit 8 is changed. The FM20 rotation speed is changed by changing the firing angle of the arc signal.

次に上述本発明回路の動作について述べる。まず交流電
源１が投入されると、ＦＭ２１−ｊサイリスタ７のＴ２
．Ｔ、端子間を介して電力供給されて回転する。この際
、中央制御回路９からは、内蔵するマイクロコンピュー
タの指令に基づいた点弧角制し 画信号を出力基、従ってゲート回路８０点弧信号の点弧
角が制御され、７Ｍ２への供給電力の波形メモリに書き
込まれたデータに基づくが、このメに モリには書き換え不能の蓼ＯＭが用いられているので、
７Ｍ２に製品ばらつき等が生じた場合、前記メモリのデ
ータ書き換えによるばらつき吸収は行い得ない。Next, the operation of the above-described circuit of the present invention will be described. First, when AC power supply 1 is turned on, T2 of FM21-j thyristor 7
．． T, rotates when powered through the terminals. At this time, the central control circuit 9 outputs a firing angle control signal based on the command of the built-in microcomputer, and therefore controls the firing angle of the gate circuit 80 firing signal, and supplies power to 7M2. This is based on the data written in the waveform memory, but since this memory uses a non-rewritable OM,
If product variations occur in 7M2, the variations cannot be absorbed by rewriting data in the memory.

このような場合に可変抵抗回路１０を操作し、その抵抗
値を変化させると、その変化に応じて中央制御回路９か
らの点弧角制御信号が変化し、ゲート回路８からサイリ
スタ７０Ｇ端子への点弧信号の点弧角が変化する。従っ
て７Ｍ２への供給電力の波形が僅か変化し、７Ｍ２の回
転数が微調整されるもので、これを各送風機据付後、各
々行えば、７Ｍ２の回転数のばらつきが調整、吸収され
ることになる。In such a case, when the variable resistance circuit 10 is operated to change its resistance value, the firing angle control signal from the central control circuit 9 changes in accordance with the change, and the firing angle control signal from the gate circuit 8 to the thyristor 70G terminal changes. The firing angle of the firing signal changes. Therefore, the waveform of the power supplied to 7M2 changes slightly, and the rotation speed of 7M2 is finely adjusted. If this is done after each blower is installed, the variations in the rotation speed of 7M2 will be adjusted and absorbed. Become.

第４図は上述動作のうち、可変抵抗回路１０の操作時に
おける中央制御回路９の動作を示すフローチャートであ
る。すなわち中央制御回路９は、７Ｍ回転数制御ルーチ
ンの最初に可変抵抗回路１０の抵抗値ＡＮを読み、その
値ＡＮを予め設定された値！、〜Ｐｎと比較して該当す
る回転数Ｎｘを演算し、所定の点弧角ベニとなるように
点弧角制御信号を変化させてゲート回路８に送出するも
のである。なお、図中Ｎは調整前の回転数、Ｎ、、Ｎ７
１は各々補正回転数である。FIG. 4 is a flowchart showing the operation of the central control circuit 9 when operating the variable resistance circuit 10 among the above-mentioned operations. That is, the central control circuit 9 reads the resistance value AN of the variable resistance circuit 10 at the beginning of the 7M rotation speed control routine, and sets the value AN to a preset value! , ~Pn, the corresponding rotational speed Nx is calculated, and the firing angle control signal is changed so that a predetermined firing angle is achieved, and the signal is sent to the gate circuit 8. In addition, N in the figure is the rotation speed before adjustment, N, , N7
1 is each correction rotation speed.

なお、上述実施例では、回転数微調整回路として可変抵
抗回路を用いたが、これのみな限らないことはいうまで
もない。また、上記可変抵抗回路のようなアナログ回路
でなく、ディジタルスイッチ等のディジタル回路を用い
て構成してもよい。In the above embodiment, a variable resistance circuit is used as the rotational speed fine adjustment circuit, but it goes without saying that this is not the only option. Further, instead of an analog circuit such as the variable resistance circuit described above, a digital circuit such as a digital switch may be used.

〔発明の効果〕 以上述べたように本発明は、書き換え不能なＲＯＭをメ
モリとしたマイクロコンピュータを有し、このマイクロ
コンピュータで送風機の回転数を制御するようにし７Ｉ
Ｃ空気調和機の制御回路において、前記送風機の回転数
を微調整する回転数微調整回路を設けたので、従来のタ
ップ付ＦＭを用いた場合のように回転数変更困難、回転
数変更時の費用増大、これらに起因する開発のための期
間の長期化等の問題が生ぜず、しかもＦＭ回転数のばら
つきの調整、吸収が可能である等の効果がある[Effects of the Invention] As described above, the present invention has a microcomputer whose memory is a non-rewritable ROM, and this microcomputer controls the rotational speed of a blower.
In the control circuit of the C air conditioner, we have installed a rotation speed fine adjustment circuit that finely adjusts the rotation speed of the blower, making it difficult to change the rotation speed unlike when using a conventional tapped FM. Problems such as increased costs and longer development periods due to these problems do not occur, and there are also effects such as being able to adjust and absorb variations in FM rotation speed.

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

第１図および第２図は各々従来回路を示す図、第３図は
本発明による仝気調和機の制御回路の一実施例を示す回
路図、第４図は同回路の動作を示すフローチャートであ
る。 １・・・交流電源　２・・・送風機モータ（ＦＭ）　７
・・・３端子双方向サイリスタ　８・・・ゲート回路　
９・・・中央側（財）回路　１０・・・可変抵抗回路（
回転数微調整回路） ＄１ｍ　第２ｍ 第３閏1 and 2 are diagrams showing conventional circuits, FIG. 3 is a circuit diagram showing an embodiment of the control circuit for an air conditioner according to the present invention, and FIG. 4 is a flowchart showing the operation of the circuit. be. 1... AC power supply 2... Blower motor (FM) 7
...3-terminal bidirectional thyristor 8...Gate circuit
9...Central side (goods) circuit 10...Variable resistance circuit (
Rotation speed fine adjustment circuit) $1m 2nd meter 3rd leap

Claims (1)

【特許請求の範囲】[Claims] 書き換え不能なＲＯＭをメモリとしたマイクロコンピュ
ータを有し、このマイクロコンピュータで送風機の回転
数を制御するようにした生気調和機の制−回路において
、前記送風機の回転数を微調整する回転数微調整回路を
設けたことを特徴とする空気調和機の制御回路。A rotation speed fine adjustment for finely adjusting the rotation speed of the air blower in a control circuit of a living air conditioner that has a microcomputer with a non-rewritable ROM as memory, and the microcomputer controls the rotation speed of the air blower. A control circuit for an air conditioner characterized by having a circuit.