JPS6193576A - Disconnection protecting circuit - Google Patents
Disconnection protecting circuitInfo
- Publication number
- JPS6193576A JPS6193576A JP21564184A JP21564184A JPS6193576A JP S6193576 A JPS6193576 A JP S6193576A JP 21564184 A JP21564184 A JP 21564184A JP 21564184 A JP21564184 A JP 21564184A JP S6193576 A JPS6193576 A JP S6193576A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- heater
- temperature detection
- circuit
- temperature
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（技術分野）
本発明は断線保護回路にかかり、詳しくは電気カーペッ
ト等における高度検出用電ｔ）の断線時にヒータへの通
電を制御するための断線保護回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a disconnection protection circuit, and more particularly to a disconnection protection circuit for controlling energization to a heater when an altitude detection electric current (t) in an electric carpet or the like is disconnected.
（背景技術）
第２図は電気カーペフト等に内蔵される面状発熱体の構
成を概略的に示したもので、２１はヒータＴｉ極、２２
は温度検出電極、２３は温度のよ７弄につれてインピー
ダンスが低下する負特性の有機半導体である。その）温
度制御に際しては、所定の交流電圧をヒータ電極２１と
温度検出電極２２との間に印加し、）品度変化に伴う有
機半導体２３のインピーダンス変化を検出してヒータ電
極２１への通電を制御する乙とにより、温度制御を行っ
ている。(Background Art) Fig. 2 schematically shows the configuration of a planar heating element built into an electric carpet lift, etc., in which 21 is a heater Ti pole, 22
23 is a temperature detection electrode, and 23 is an organic semiconductor with a negative characteristic whose impedance decreases as the temperature increases. When controlling the temperature, a predetermined alternating current voltage is applied between the heater electrode 21 and the temperature detection electrode 22, and changes in impedance of the organic semiconductor 23 due to changes in quality are detected and current is applied to the heater electrode 21. The temperature is controlled by the controller.
ところで、乙の種の面状発熱体は、通常、金属箔にエツ
チング処理等を施すことによりヒータ電極２１および温
度検出電極２２をパターン形成するものであるため、時
として断線する危険性がある。特に、温度検出Ｔｉ極２
２が断線した場合には上述しｔコ温度制ｍ動作が適切に
行われず、ヒータ電極２１へのＪコミが連続されて異常
過２Ａ状態となり衛めて危険である。By the way, in the sheet heating element of the type B, the heater electrode 21 and the temperature detection electrode 22 are usually patterned by etching or the like on a metal foil, so there is a risk of wire breakage at times. In particular, the temperature detection Ti electrode 2
If 2 is disconnected, the above-mentioned temperature control operation will not be performed properly, and J current to the heater electrode 21 will continue, resulting in an abnormal over 2A state, which is extremely dangerous.
ここで、第３図は従来の温度制御回路を示すもので、図
中、八Ｃは交流電源、Ｓｗはメインスイッチ、２４１よ
定電圧直流電源の如き電源回路、２５は、温度検出信号
処理回路、２６はスイッチング１品詞回路、２７はリレ
ー駆動回路、Ｒは検出用抵抗、Ｂｙはリレー駆動回路２
７により駆動されるリレーの接点を示している。Here, FIG. 3 shows a conventional temperature control circuit, in which 8C is an AC power supply, Sw is a main switch, 241 is a power supply circuit such as a constant voltage DC power supply, and 25 is a temperature detection signal processing circuit. , 26 is a switching 1 part-of-speech circuit, 27 is a relay drive circuit, R is a detection resistor, By is a relay drive circuit 2
The contacts of the relay driven by 7 are shown.
かかる回路構成において、温度検出電極２２のｂ点で断
線が生じた場合、そのａｂ間は実質的に温度検出電）が
存在しない状態となるため、ヒータＴｉ極２１から有機
半導体２３を介して温度検出電Ｉ！ｉ！２２に流入する
電流の値が大幅に減少し、前述の即き温度制御が不能の
状態となって安全が確保されないという欠点を有してい
た。In such a circuit configuration, if a disconnection occurs at point b of the temperature detection electrode 22, there will be a state in which there is substantially no temperature detection electrode between ab and the temperature detection electrode 22. Detection electricity I! i! This has the drawback that the value of the current flowing into the device 22 is significantly reduced, making the above-mentioned immediate temperature control impossible, and thus safety cannot be ensured.
（発明の目的）
本発明（よ上記の点に鑑み提案されにものであり、七の
目的とする々こる１よ、ン詔度検出宿）の１む１．除を
正確に検出して七−夕１１１への通電を適切に制翻し、
もってヒータ電極の過熱を防止して安全を確保できるよ
うにした断線保護回路を提供することにある。(Objects of the Invention) The present invention has been proposed in view of the above points, and has seven objects. accurately detects the power supply to Tanabata 111,
It is an object of the present invention to provide a disconnection protection circuit which can thereby prevent overheating of a heater electrode and ensure safety.
（発明の開示） 以下、実施例を示す図面に沿って本発明を詳述する。(Disclosure of invention) DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to drawings showing embodiments.
第１図は本発明の一実施例を示す回路構成図である。図
において構成を説明すると、１はす、−接点Ｒ２，メイ
ンスイッチＳＷおよび温度ヒユーズＴＦを介して交流？
ｔｉ源人Ｃに接続されるヒータＫｍ、２は温度変化に対
して負のインピーダンス特性を有する有機半導体を介し
てヒータｉ ＪΣ１と対向する温度検出電極であり、温
度検出電極２の一端は零相変成器ＺＣＴのコア内を貫通
してヒータ電極１の一端と直接接続されている。また、
Ａ度検出電極２の他端は抵抗Ｒ１を介してヒータ電極１
の他端に接続されると共に、抵抗Ｒ２を介してサイリス
クＳＣＲのゲートに接続され、このゲートは抵抗Ｒ５を
介して前記ヒータ電極１の一端に接続されている。ここ
で、サイリスタＳＣＲはその導通により直列に接続され
た発熱用の抵抗Ｒ４を発熱せしめ、これと熱的にカスプ
リングされた温度ヒユーズＴＦを溶断するものであり、
サイリスタＳＣＲと抵抗Ｒ４の直列回路はヒータ電ｔ）
１と並列に接続されている。FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention. To explain the configuration with reference to the figure, 1 is an AC voltage through contact R2, main switch SW, and temperature fuse TF.
The heater Km2 connected to the source C is a temperature detection electrode that faces the heater iJΣ1 via an organic semiconductor having negative impedance characteristics with respect to temperature changes, and one end of the temperature detection electrode 2 is a zero-phase It passes through the core of the transformer ZCT and is directly connected to one end of the heater electrode 1. Also,
The other end of the A degree detection electrode 2 is connected to the heater electrode 1 via a resistor R1.
It is connected to the other end and also to the gate of the SIRISK SCR via a resistor R2, and this gate is connected to one end of the heater electrode 1 via a resistor R5. Here, the thyristor SCR causes the heat generating resistor R4 connected in series to generate heat due to its conduction, and blows out the temperature fuse TF which is thermally coupled with the heat generating resistor R4.
The series circuit of thyristor SCR and resistor R4 is heater current t)
1 is connected in parallel.
一方、零相変成器ＺＣＴの２次側出力端子は増幅回２８
３に接続され、増幅回９３の出力は平滑回路４．スイッ
チング回路５．リレー駆動回路６を順次介し、リレー駆
動回路６によりリレー接点Ｒｙのオン・オフが制御され
るようになっている。すなわち、増幅回路３では零相変
成器Ｚ、ＣＴの微小な出力信号を増幅し、平滑回路４で
は整流・平滑を行って交流信号から直流信号（ａ度検出
（；号）に変換を行い、スイッチング回路５では設定温
度に対応した設定値と温度検出信号とを比較してヒータ
への通電の可否を判断し、リレー駆動回路６ではスイッ
チング回路５の出力Ｌζ応じて実際にリレーを駆動する
ものである。また、７は電源回路であり、各回路部に直
流電源を供給するためのものである。On the other hand, the secondary output terminal of the zero-phase transformer ZCT is connected to the amplifier circuit 28.
3, and the output of the amplification circuit 93 is connected to the smoothing circuit 4.3. Switching circuit 5. The relay contact Ry is turned on and off by the relay drive circuit 6 sequentially through the relay drive circuit 6. That is, the amplifier circuit 3 amplifies the minute output signals of the zero-phase transformers Z and CT, and the smoothing circuit 4 performs rectification and smoothing to convert the AC signal to a DC signal (a degree detection (;)). The switching circuit 5 compares the set value corresponding to the set temperature with the temperature detection signal to determine whether or not to energize the heater, and the relay drive circuit 6 actually drives the relay according to the output Lζ of the switching circuit 5. Further, 7 is a power supply circuit for supplying DC power to each circuit section.
しかして、動作にあたり、通常の温度制御にあっでは、
零相変成器ＺＣＴの出力信号を増幅回路３、平滑回路４
により増幅・平滑して得た温度検出信号をスイッチング
回路５において所定値と比較し、）門度がそれ以下であ
ればリレー接点Ｒｙをオンの状態に保ってヒータ電極１
への通電を行い、逆に温度が所定の値に達している場合
にはリレー接点Ｒｙをオフにしてｆ！電を停止し、これ
らの動作により発熱体は所望の温度に保たれろことにな
る。However, during operation, if normal temperature control is not used,
The output signal of the zero-phase transformer ZCT is transmitted to the amplifier circuit 3 and the smoothing circuit 4.
The temperature detection signal obtained by amplifying and smoothing is compared with a predetermined value in the switching circuit 5, and if the gate power is less than that, the relay contact Ry is kept on and the heater electrode 1 is
On the other hand, if the temperature reaches a predetermined value, relay contact Ry is turned off and f! is energized. The heating element will be kept at the desired temperature by these operations.
一方、温度検出゛電極２の抵抗値は３０Ω以下であり、
また、ヒータ電ｔｆｆ！１から流入する電流も小さいた
め、温度検出電極２の両端に生じろ電圧ｖ２は０５■以
下てあり、よって温度検出電極２から抵抗Ｒ２を介して
ゲートにイ；号が与えられるサイリスクＳＣＲは通常は
オフの状態を保っている。On the other hand, the resistance value of the temperature detection electrode 2 is 30Ω or less,
Also, the heater electric tff! Since the current flowing from the temperature sensing electrode 2 is also small, the voltage v2 generated across the temperature sensing electrode 2 is less than 05. Therefore, the SIRISK SCR in which the voltage is applied from the temperature sensing electrode 2 to the gate via the resistor R2 is normally remains off.
ここで、温度検出電極２に断線が生じた場合を考えると
、以前は温度検出電）】２を介してヒータ電！５３１の
一端に接続されていた抵抗Ｒ，，Ｒ２の接続点は開力父
され、サイリスクＳＣＲのゲートには交流電源へＣの電
圧を抵抗Ｒ，，Ｒ２と抵抗Ｒ３とて分圧した電圧が加わ
ることになり、サイリスク５ＣＲＩよ導通する。これに
より、発熱用の抵抗Ｒ。Now, if we consider the case where a disconnection occurs in the temperature detection electrode 2, the heater voltage ! The connection point of resistors R, , R2 connected to one end of 531 is opened, and the gate of Cyrisk SCR receives the voltage obtained by dividing the voltage of C through resistors R, , R2 and resistor R3 to the AC power supply. It will be added, and it will be conductive to Cyrisk 5CRI. As a result, the resistance R for heat generation.
に電流が流れ、熱的℃こ結合された温度ヒユーズＴＦを
溶断せしめ、交流電源へＣと回路との経路を鹿断じて、
ヒータ電極１への通電を停止することができろ。A current flows through C, thermally fusing the temperature fuse TF connected to C, and cutting off the path between C and the circuit to the AC power source.
Is it possible to stop the power supply to the heater electrode 1?
（発明の効里）
以上のように、本発明にあっては、ヒータ電極と温度検
出電極との間に有機半導体を配設し、温度変化に伴う前
記有（晟半導体のインピーダンス変化による前記ヒータ
Ｔｓ 極と温度検出電極との間に流れる電流値の変化を
検出して前記ヒータへの通電を制御することにより温度
制翻を行うようにしたものにおいて、前記温度検出電極
の一端を零相変成器を介してビータ電極の一端に接続し
、かつ他端を前記ヒータ電への他端に抵抗を介して接続
し、前記温度検出電極の断線時における当該温度検出ｆ
、 １％の電位変化を検出して前記ヒータ電柵への通電
を絶つようにしたのて、温度検出電Ｉ］の断線を正確に
検出し得、ヒータ電極への通電を速やかに断つことがで
き、ヒータ電１″ｆ３の過熱を防止して、安全を確保て
きる効果が、ある。(Effects of the Invention) As described above, in the present invention, an organic semiconductor is disposed between a heater electrode and a temperature detection electrode, and the heater is In the device in which the temperature is controlled by detecting a change in the value of the current flowing between the Ts pole and the temperature detection electrode and controlling the energization to the heater, one end of the temperature detection electrode is subjected to zero phase transformation. one end of the beater electrode is connected to the beater electrode through a resistor, and the other end is connected to the other end of the heater electrode through a resistor to detect the temperature f when the temperature detection electrode is disconnected.
By detecting a potential change of 1% and cutting off the power to the heater electric fence, it is possible to accurately detect the disconnection of the temperature detection voltage I and quickly cut off the power to the heater electrode. This has the effect of preventing overheating of the heater electric 1″f3 and ensuring safety.
第１図は本発明の一実施例を示す回路構成図、第２図は
発熱体の構造を示す概念図、第３図は従来の温度制御回
路を示す回路構成図である。
１ ・ ヒータ電極、２・・・・温度検出電極、３・増
幅回路、４ ・ 平滑回路、５ ・・スインチング回路
、６ ・・リレー駆動回路、７・ 電源回路、ＡＣ・・
・・交流電源、ＳＷ・ −メインスイッチ、ＺＣＴ−・
・零相変成器、Ｒ，リレー接点、ＴＦ・ ・温度ヒユ
ーズ、ＳＣＲ・、 サイリスク、Ｒ２−Ｒ４・ を
１抗FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a conceptual diagram showing the structure of a heating element, and FIG. 3 is a circuit diagram showing a conventional temperature control circuit. 1. Heater electrode, 2. Temperature detection electrode, 3. Amplification circuit, 4. Smoothing circuit, 5. Sinching circuit, 6. Relay drive circuit, 7. Power supply circuit, AC.
・・AC power supply, SW・ -Main switch, ZCT-・
・Zero-phase transformer, R, relay contact, TF・・Temperature fuse, SCR・, Cyrisk, R2-R4・
Claims (1)
、温度変化に伴う前記有機半導体のインピーダンス変化
による前記ヒータ電極と温度検出電極との間に流れる電
流値の変化を検出して前記ヒータへの通電を制御するこ
とにより温度制御を行うようにしたものにおいて、前記
温度検出電極の一端を零相変成器を介してヒータ電極の
一端に接続し、かつ他端を前記ヒータ電極の他端に抵抗
を介して接続し、前記温度検出電極の断線時における当
該温度検出電極の電位変化を検出して前記ヒータ電極へ
の通電を絶つことを特徴とした断線保護回路。An organic semiconductor is disposed between the heater electrode and the temperature detection electrode, and a change in the value of the current flowing between the heater electrode and the temperature detection electrode due to a change in impedance of the organic semiconductor due to a temperature change is detected to detect the change in the value of the current flowing between the heater electrode and the temperature detection electrode. In the temperature control device, one end of the temperature detection electrode is connected to one end of the heater electrode via a zero-phase transformer, and the other end is connected to the other end of the heater electrode. A disconnection protection circuit, which is connected to the heater electrode via a resistor, detects a change in potential of the temperature detection electrode when the temperature detection electrode is disconnected, and cuts off power to the heater electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21564184A JPS6193576A (en) | 1984-10-15 | 1984-10-15 | Disconnection protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21564184A JPS6193576A (en) | 1984-10-15 | 1984-10-15 | Disconnection protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6193576A true JPS6193576A (en) | 1986-05-12 |
Family
ID=16675767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21564184A Pending JPS6193576A (en) | 1984-10-15 | 1984-10-15 | Disconnection protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6193576A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6386292A (en) * | 1986-09-29 | 1988-04-16 | 松下電工株式会社 | Electric carpet |
| US10835090B2 (en) | 2015-05-22 | 2020-11-17 | Abdulaziz Payziev | Toilet ventilation system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034705A (en) * | 1973-07-31 | 1975-04-03 |
-
1984
- 1984-10-15 JP JP21564184A patent/JPS6193576A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034705A (en) * | 1973-07-31 | 1975-04-03 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6386292A (en) * | 1986-09-29 | 1988-04-16 | 松下電工株式会社 | Electric carpet |
| US10835090B2 (en) | 2015-05-22 | 2020-11-17 | Abdulaziz Payziev | Toilet ventilation system |
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