JPS627987Y2 - - Google Patents
Info
- Publication number
- JPS627987Y2 JPS627987Y2 JP1980046772U JP4677280U JPS627987Y2 JP S627987 Y2 JPS627987 Y2 JP S627987Y2 JP 1980046772 U JP1980046772 U JP 1980046772U JP 4677280 U JP4677280 U JP 4677280U JP S627987 Y2 JPS627987 Y2 JP S627987Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- refrigerator
- resistance
- output
- microcomputer
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【考案の詳細な説明】
考案の目的
産業上の利用分野
この考案は、マイクロコンピユータを用いた電
子制御冷蔵庫の制御回路に関する。[Detailed Description of the Invention] Purpose of the Invention Industrial Application Field This invention relates to a control circuit for an electronically controlled refrigerator using a microcomputer.
従来の技術
冷蔵庫のコンプレツサ、電磁弁等をマイクロコ
ンピユータにより電子制御する場合、通常は操作
部と制御部を分離して構成するが、冷蔵庫の制御
動作点を高精度化する必要がある。2. Description of the Related Art When a refrigerator compressor, solenoid valve, etc. are electronically controlled by a microcomputer, the operating section and the control section are usually configured separately, but it is necessary to improve the precision of the control operating point of the refrigerator.
第１図は従来の電子制御冷蔵庫の制御回路を示
す。 FIG. 1 shows a control circuit of a conventional electronically controlled refrigerator.
この回路は、冷蔵庫の温度を抵抗値の変化で検
出する温度センサ（たとえばサーミスタ）１と、
この温度センサ１に直列に接続されると共に、基
準電圧Vccに接続された温度調整用の操作回路２
２と、基準電圧Vccに接続された固定抵抗器R1及
びR2で成る基準抵抗回路３と、操作回路２２の
出力V1及び基準抵抗回路３の出力V2を比較して
その比較結果をマイクロコンピユータ４の入力信
号CMとするコンパレータとを設け、マイクロコ
ンピユータ４の出力により出力駆動回路６を介し
てコンプレツサ、電磁弁等を制御するようにした
ものである。しかして、操作回路２は固定抵抗器
R3及びこれに直列に接続された可変抵抗器VR1で
構成されている。 This circuit includes a temperature sensor (for example, a thermistor) 1 that detects the temperature of the refrigerator by a change in resistance value;
A temperature adjustment operation circuit 2 connected in series to this temperature sensor 1 and also connected to a reference voltage Vcc.
2 and a reference resistance circuit 3 consisting of fixed resistors R 1 and R 2 connected to the reference voltage Vcc, the output V 1 of the operation circuit 22 and the output V 2 of the reference resistance circuit 3 are compared, and the comparison result is A comparator is provided to receive the input signal CM of the microcomputer 4, and the output of the microcomputer 4 is used to control a compressor, a solenoid valve, etc. via an output drive circuit 6. Therefore, the operation circuit 2 is a fixed resistor.
It consists of R 3 and a variable resistor VR 1 connected in series with it.
このような構成において、基準抵抗回路３の出
力V2は固定的にコンパレータ５の負入力端子に
印加されており、操作回路２の可変抵抗器VR1か
らの出力V1はコンパレータ５の正入力端子に印
加されている。そして、今、たとえばV1＜V2の
時にコンパレータ５の出力CMが２値信号「０」
になつているとすると、この時マイクロコンピユ
ータ４は信号CMに基づく動作を行なわない。し
かして、冷蔵庫内の温度が変化して高くなると、
これが温度センサ１によつて検知されV1≧V2と
なる。これによりコンパレータ５の出力は「１」
となり、これがマイクロコンピユータ４に入力さ
れることにより、マイクロコンピユータ４は所定
のプログラムに従つて主力駆動回路６を介してコ
ンプレツサ等を制御する。 In such a configuration, the output V 2 of the reference resistance circuit 3 is fixedly applied to the negative input terminal of the comparator 5, and the output V 1 from the variable resistor VR 1 of the operating circuit 2 is applied to the positive input terminal of the comparator 5. applied to the terminal. Now, for example, when V 1 < V 2 , the output CM of comparator 5 is a binary signal "0".
If it is, then the microcomputer 4 does not perform any operation based on the signal CM. However, when the temperature inside the refrigerator changes and becomes high,
This is detected by the temperature sensor 1 and V 1 ≧V 2 . As a result, the output of comparator 5 is "1"
By inputting this to the microcomputer 4, the microcomputer 4 controls the compressor etc. via the main drive circuit 6 according to a predetermined program.
考案が解決しようとする問題点
ところで、かかる制御回路では可変抵抗器VR1
のバラツキが大きいため、動作点に不安定を生じ
ることがある。そのため、冷蔵庫の動作点を安定
に制御することができない。Problems to be solved by the invention By the way, in this control circuit, the variable resistor VR 1
Due to large variations in the operating point, the operating point may become unstable. Therefore, the operating point of the refrigerator cannot be stably controlled.
本考案は、以上のように操作部と制御部とを分
離した冷蔵庫制御回路において、可変抵抗器のバ
ラツキにかかわらず安定に動作点を決定すること
ができる制御回路を提供することを目的とする。 The purpose of the present invention is to provide a control circuit that can stably determine the operating point regardless of variations in the variable resistor in a refrigerator control circuit in which the operating section and the control section are separated as described above. .
考案の構成
問題点を解決するための手段
そこで、本考案は、庫内温度により抵抗値が変
わる温度センサと基準電源との間に接続される温
度調節用の操作回路を、低抵抗の固定抵抗器と、
これに並列接続された高抵抗の可変抵抗器とで構
成したことを要旨とする。Means for solving the configuration problems of the invention Therefore, the present invention has developed a temperature control operation circuit connected between a temperature sensor whose resistance value changes depending on the temperature inside the refrigerator and a reference power source, using a fixed resistor with a low resistance. The vessel and
The gist of this is that it is constructed with a high-resistance variable resistor connected in parallel.
作 用
この操作回路の出力電圧値は、固定抵抗の抵抗
値が可変抵抗のそれに比べて小さくなつているの
で、固定抵抗の値で主に決定され、可変抵抗器に
バラツキがあつてもほぼ一定の値になる。Function The output voltage value of this operating circuit is mainly determined by the value of the fixed resistor, as the resistance value of the fixed resistor is smaller than that of the variable resistor, and it remains almost constant even if there are variations in the variable resistor. becomes the value of
実施例
以下、第２図に示す実施例により本考案を説明
する。Embodiment Hereinafter, the present invention will be explained with reference to an embodiment shown in FIG.
第２図において、温度センサ１、基準抵抗回路
３、コンパレータ５、マイクロコンピユータ４及
び出力駆動回路６は第１図と同一であり、基準電
源Vccと温度セナンサ１４の間に接続された温度
調節用の操作回路２Ａが第１図と相違している。
即ち、操作回路２Ａは固定抵抗器R3と、これに
直列に接続された固定抵抗器R4に並列に接続さ
れた可変抵抗器VR2とで構成されており、R4≫
VR2の関係を有している。そして可変抵抗器VR2
の出力電圧V1がコンパレータ５の正入力端子に
印加されている。 In FIG. 2, a temperature sensor 1, a reference resistance circuit 3, a comparator 5, a microcomputer 4, and an output drive circuit 6 are the same as in FIG. The operating circuit 2A is different from that in FIG.
That is, the operating circuit 2A is composed of a fixed resistor R 3 and a variable resistor VR 2 connected in parallel to the fixed resistor R 4 connected in series, and R 4 ≫
VR has 2 relationships. and variable resistor VR 2
The output voltage V 1 of is applied to the positive input terminal of the comparator 5.
このような構成において、操作回路２Ａの固定
抵抗器R4の抵抗値が可変抵抗器VR2のそれに比べ
て非常に小さくなつているので、操作回路２Ａの
両端電圧V0はほぼ抵抗R4の値によつて決定され
ることになる。したがつて、操作回路２Ａの出力
V1は、温度センサ１の抵抗値つまり庫内温度の
みに左右され、可変抵抗器VR2にバラツキがあつ
ても庫内温度が同じであればほぼ同じ電圧を示
す。その結果、安定した動作点を得ることができ
る。 In such a configuration, the resistance value of the fixed resistor R 4 of the operating circuit 2A is much smaller than that of the variable resistor VR 2 , so the voltage V 0 across the operating circuit 2A is approximately equal to that of the resistor R 4 . It will be determined by the value. Therefore, the output of the operating circuit 2A
V 1 depends only on the resistance value of the temperature sensor 1, that is, the temperature inside the refrigerator, and shows almost the same voltage even if there is variation in the variable resistor VR 2 as long as the temperature inside the refrigerator is the same. As a result, a stable operating point can be obtained.
考案の効果
以上のように、この考案の制御回路によれば操
作部と制御部を分離しているにもかかわらず、動
作点を安定化することができる利点を有してい
る。Effects of the invention As described above, the control circuit of this invention has the advantage of being able to stabilize the operating point despite separating the operating section and the control section.
第１図はこの従来の制御回路を示す回路構成
図、第２図はこの考案の一実施例を示す回路構成
図である。
１……温度センサ、２，２Ａ……操作回路、３
……基準抵抗回路、４……マイクロコンピユー
タ、５……コンパレータ、６……出力駆動回路、
R4……固定抵抗器、VR2……可変抵抗器。
FIG. 1 is a circuit configuration diagram showing this conventional control circuit, and FIG. 2 is a circuit configuration diagram showing an embodiment of this invention. 1...Temperature sensor, 2,2A...Operation circuit, 3
...Reference resistance circuit, 4...Microcomputer, 5...Comparator, 6...Output drive circuit,
R 4 ... Fixed resistor, VR 2 ... Variable resistor.
Claims (1)
の制御回路において、前記冷蔵庫内の温度を抵抗
値の変化で検出する温度センサと、この温度セン
サに直列に接続されると共に基準電源に接続され
た温度調整用の操作回路と、前記基準電源に接続
された基準抵抗回路と、前記操作回路の出力及び
前記基準抵抗回路の出力を比較して比較結果を前
記マイクロコンピユータの入力信号とするコンパ
レータとを具え、前記操作回路は、低抵抗の固定
抵抗器と、これに並列に接続された高抵抗の可変
抵抗器とで構成されていることを特徴とする冷蔵
庫制御回路。 A control circuit for an electronically controlled refrigerator using a microcomputer includes a temperature sensor that detects the temperature inside the refrigerator by a change in resistance value, and a temperature adjustment device that is connected in series to this temperature sensor and connected to a reference power source. an operating circuit, a reference resistance circuit connected to the reference power source, and a comparator that compares the output of the operating circuit and the output of the reference resistance circuit and uses the comparison result as an input signal to the microcomputer; A refrigerator control circuit characterized in that the circuit is composed of a low-resistance fixed resistor and a high-resistance variable resistor connected in parallel to the fixed resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980046772U JPS627987Y2 (en) | 1980-04-07 | 1980-04-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980046772U JPS627987Y2 (en) | 1980-04-07 | 1980-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56148579U JPS56148579U (en) | 1981-11-09 |
| JPS627987Y2 true JPS627987Y2 (en) | 1987-02-24 |
Family
ID=29641784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980046772U Expired JPS627987Y2 (en) | 1980-04-07 | 1980-04-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS627987Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS551181B2 (en) * | 1971-09-24 | 1980-01-12 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS551181U (en) * | 1979-04-24 | 1980-01-07 |
-
1980
- 1980-04-07 JP JP1980046772U patent/JPS627987Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS551181B2 (en) * | 1971-09-24 | 1980-01-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56148579U (en) | 1981-11-09 |
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