JPH0269808A - Temperature controller - Google Patents
Temperature controllerInfo
- Publication number
- JPH0269808A JPH0269808A JP22201288A JP22201288A JPH0269808A JP H0269808 A JPH0269808 A JP H0269808A JP 22201288 A JP22201288 A JP 22201288A JP 22201288 A JP22201288 A JP 22201288A JP H0269808 A JPH0269808 A JP H0269808A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- circuit
- constant
- voltage
- sensing layer
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、例えば電気カーペット、電気毛布等の温度制
御装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a temperature control device for, for example, electric carpets, electric blankets, etc.
（ロ）従来の技術
通常、電気毛布等に使用する温度検出用の感温層は、有
機樹脂によって成形され温度による抵抗値を変化するの
で、温度制御に利用される。また、前記感温層はその素
材の性質として直流電圧を印加すると所謂分極作用を生
ずることから交流電圧を印加する必要がある。この点に
ついて特開昭６０−１６２１３０号公報がある。この先
行技術では、感温層の抵抗値の変化（負性サーミスタ）
を利用して温度制御を行うもので、例えば感温層の抵抗
値がある定められた値になったときにヒーターに通電或
は断電するようにしているが、感温層には交流電圧を印
加するために商用交流電圧が外部要因によって変動し、
電源重圧が高い場合には温度検出回路が実際の温度より
も高いものと判断して設定温度よりも低くなる。また、
反対に電源電圧が低い場合には温度検出回路が実際の温
度よりも低いものと判断して設定温度よりも高くなり不
都合を生ずる欠点があった。特に、設定温度を「高ヨに
した場合であって電源電圧が大幅に低下したときは設定
温度よりも高くなり危険であった。(b) Prior Art A temperature-sensitive layer for detecting temperature used in an electric blanket or the like is usually molded from an organic resin and changes its resistance value depending on the temperature, and is therefore used for temperature control. Furthermore, since the temperature-sensitive layer produces a so-called polarization effect when a direct current voltage is applied due to the nature of its material, it is necessary to apply an alternating current voltage to the temperature sensitive layer. Regarding this point, there is Japanese Patent Application Laid-Open No. 162130/1983. In this prior art, changes in the resistance of the temperature sensitive layer (negative thermistor)
For example, when the resistance of the temperature-sensitive layer reaches a certain value, the heater is energized or disconnected, but the temperature-sensing layer does not require an AC voltage. The commercial AC voltage fluctuates due to external factors in order to apply
When the power supply pressure is high, the temperature detection circuit determines that the temperature is higher than the actual temperature, and the temperature becomes lower than the set temperature. Also,
On the other hand, when the power supply voltage is low, the temperature detection circuit determines that the temperature is lower than the actual temperature, and the temperature becomes higher than the set temperature, causing an inconvenience. In particular, if the set temperature was set too high and the power supply voltage dropped significantly, the temperature would rise above the set temperature, which was dangerous.
（ハ）発明が解決しようとする課題
本発明は、感温層に印加される交流電源電圧を一定にし
て設定温度に対して正確な温度制御を行うものである。(c) Problems to be Solved by the Invention The present invention performs accurate temperature control with respect to the set temperature by keeping the AC power supply voltage applied to the temperature sensitive layer constant.
（ニ）課題を解決するだめの手段
発熱体と、温度により抵抗値が変化する感温層を介して
一対の導体を添設した感熱体と、抵抗と温度設定器とか
らなる基準電圧回路及び前記感温層のインピーダンスの
変化を電圧変化に変換する変換回路と、前記基準電圧回
路と変換回路の出力を比較する比較回路と、該比較回路
の出力によって前記発熱体の通電を制御する制御回路と
、前記感温層に印加する交流電源電圧を一定にする低電
圧回路とを備えた構成である。(d) Means for solving the problem A reference voltage circuit consisting of a heating element, a heat sensitive body attached with a pair of conductors via a temperature sensitive layer whose resistance value changes depending on temperature, a resistor and a temperature setting device; a conversion circuit that converts a change in impedance of the temperature-sensitive layer into a voltage change; a comparison circuit that compares the output of the conversion circuit with the reference voltage circuit; and a control circuit that controls energization of the heating element based on the output of the comparison circuit. and a low voltage circuit that keeps the AC power supply voltage applied to the temperature sensitive layer constant.
（ホ）作 用
低電圧回路によって予め前記感温層に印加される交流電
源電圧を一定にし、外部要因により交流電源電圧が変動
しても常に設定温度に対して正確な温度制御を行う。(e) Operation The AC power supply voltage applied to the temperature-sensitive layer is made constant by the low voltage circuit in advance, and even if the AC power supply voltage fluctuates due to external factors, accurate temperature control is always performed with respect to the set temperature.
（へ）実施例 本発明の実施例を図面に基づ・いて説明する。(f) Example Embodiments of the present invention will be described based on the drawings.
（１）は商用交流電源、（２）は該交流電源にリレー接
点（３〉を介して接続した発熱体、（４）は温度により
抵抗値が負の特性を示して変化する感温層（５）を介し
て一対の導体（６ａ）、（６ｂ）を添設した線状の感熱
体で、中心に絶縁芯（７）を設は最も外側に絶縁外皮（
８）を設けている。（９）は抵抗（１０）と温度設定器
（１１）（以下ボリウムとする）よりなる基準電圧回路
、（１２）は前記感温層（５）のインピーダンスの変化
を電圧変化に変換する変換回路で、抵抗（１３）とダイ
オード（１４）とコンデンサー（１５）とよりなる。（
１６）は反転入力端子を前記基準電圧回路（９）の抵抗
（１０）とポリウム（１１）との接読部に接続し非反転
入力端子を前記変換回路（１２）のダイオード（１４）
とコンデンサー（１５）との間に接続した比較回路、（
１７）は該比較回路の出力によって予め記憶されたプロ
グラムに基づき前記発熱体（２）の通電を制御するマイ
クロコンピュータにより構成した制御回路、（１８）は
該制御回路の出力によって０Ｎ−ＯＦＦするスイッチン
グトランジスタ、（１９）は該スイッチングトランジス
タに直列接続したリレーで、前記リレー接点（３）を０
Ｎ−ＯＦＦするものである。（２０）は前記比較回路（
１６）と制御回路（１７）とリレー（９）の駆動用電源
、（２１）はダイオードで、前記ダイオード（１４）と
共に感温層（５）に交−ａ、電圧を印加するものである
。 （２２）は前記感温層（５）のインピーダンスに直
列接続した分圧抵抗である。(1) is a commercial AC power supply, (2) is a heating element connected to the AC power supply via a relay contact (3), and (4) is a temperature-sensitive layer (4) whose resistance value changes with negative characteristics depending on temperature. It is a wire-shaped heat sensitive body with a pair of conductors (6a) and (6b) attached through a conductor (6a) and (6b), with an insulating core (7) in the center and an insulating outer skin (7) on the outermost side.
8). (9) is a reference voltage circuit consisting of a resistor (10) and a temperature setting device (11) (hereinafter referred to as a volume), and (12) is a conversion circuit that converts a change in impedance of the temperature sensitive layer (5) into a voltage change. It consists of a resistor (13), a diode (14), and a capacitor (15). (
16) connects its inverting input terminal to the connection between the resistor (10) and polyurethane (11) of the reference voltage circuit (9), and connects its non-inverting input terminal to the diode (14) of the conversion circuit (12).
A comparison circuit connected between the and the capacitor (15), (
17) is a control circuit configured by a microcomputer that controls energization of the heating element (2) based on a program stored in advance based on the output of the comparison circuit; and (18) is a switching circuit that is turned on and off according to the output of the control circuit. The transistor (19) is a relay connected in series with the switching transistor, and the relay contact (3) is set to 0.
It is to be turned off. (20) is the comparison circuit (
16), a power source for driving the control circuit (17) and the relay (9), and (21) a diode which, together with the diode (14), applies an AC voltage to the temperature sensitive layer (5). (22) is a voltage dividing resistor connected in series with the impedance of the temperature sensitive layer (5).
（２３）は前記交流電源（１）の両側にチェナーダイオ
ード（２４）（２４）の夫々を直列に接読した低電圧回
路で、ライン（Ｌ＋）−（Ｌり間を約３０Ｖに一定にす
る。この場合の約３０Ｖに設定した理由はできるだけ波
形の高範囲に亘って安定した出力を得られるレベル（Ｍ
圧）を実験的に選択したものである。もし、３０Ｖ以上
の電圧に設定した場合は低電圧回路（２３）の出力電圧
にムラを生ずることになり安定した定電圧が得られず、
反対に３０Ｖ以下の低電圧に設定した場合は、後段の各
部の部品（変換回路（１２）、基準電圧回路（９）等）
が正常に動作しないことになるためである。（２４）は
交流電源（１）の−側と前記感温層（５）との間に接続
した抵抗である。(23) is a low voltage circuit in which Zener diodes (24) and (24) are connected in series on both sides of the AC power supply (1), and the voltage between the lines (L+) and (L) is kept constant at about 30V. The reason for setting it to about 30V in this case is to set it to a level (M
(pressure) was selected experimentally. If the voltage is set to 30V or higher, the output voltage of the low voltage circuit (23) will become uneven, making it impossible to obtain a stable constant voltage.
On the other hand, if the voltage is set to a low voltage of 30V or less, the components in the subsequent stages (conversion circuit (12), reference voltage circuit (9), etc.)
This is because it will not work properly. (24) is a resistor connected between the negative side of the AC power source (1) and the temperature sensitive layer (5).
次に動作について述べる。交流を源（１）を供給すると
、定電圧回路（２３）によってライン（Ｌ、）−■
（Ｌ、）間を約３０Ｖとなり第５図−の様な波形となっ
て現われる。そして、交流電源を供給した当初は電気カ
ーペット等の器具本体（図示せず）の温度が低いために
感温層（５）の抵抗値が大きくなっており、導体（６ｂ
）と抵抗（２２）との接続部■
（イ）の波形は第３固縛の様に現われる。この接続部（
イ）の電圧変化を変換回路（１２）によって検出しダイ
オード（１４）とコンデンサ（１５）の接続部（ロ）の
波形はコンデンサ（１５）によって安定化され第３図■
鏝の様に現われる。そして、変換回路（１２）の出力電
位と基準電圧回路（９）の基準電位とを比較回路り１２
）によって比較され、その出力が「Ｈ」となって制御回
路（１７）に入力されるが、この時、接続部＠
（ロ）の波形形は第３図に示す様に交流型！（１）の正
の周期の立上がり時に感温ＮＪ＜５）の持つ抵抗、容量
成分によって微分パルス（第３図の（Ｐ））を発生して
波形が不安定となるため、制御回路（１７）によって交
流電源（１）の負の周期の時に発生した比較回路（１６
）の出力を取り込みスイッチングトランジスタ（１８）
をＯＮにしリレー（１９）を駆動して基リレー接点（３
）をＯＮにし発
熱体（２）に通電する。Next, we will discuss the operation. When an alternating current source (1) is supplied, the constant voltage circuit (23) generates a voltage of about 30V between the lines (L,) and (L,), which appears as a waveform as shown in FIG. When AC power is first supplied, the temperature of the appliance body (not shown), such as an electric carpet, is low, so the resistance value of the temperature-sensitive layer (5) increases, and the conductor (6b
) and the resistor (22) connection ■ The waveform in (a) appears like a third lock. This connection (
The voltage change in (a) is detected by the conversion circuit (12), and the waveform at the connection point (b) between the diode (14) and the capacitor (15) is stabilized by the capacitor (15) and appears like a trowel in Fig. 3. Then, the comparison circuit 12 compares the output potential of the conversion circuit (12) and the reference potential of the reference voltage circuit (9).
), and the output becomes "H" and is input to the control circuit (17), but at this time, the waveform of the connection part @ (b) is an AC type!, as shown in Figure 3. At the rise of the positive cycle of (1), a differential pulse ((P) in Figure 3) is generated due to the resistance and capacitance components of the temperature sensor (NJ < 5), making the waveform unstable. ) caused the comparison circuit (16
) switching transistor (18)
Turn ON and drive the relay (19) to connect the base relay contact (3).
) is turned on to energize the heating element (2).
やがて、器具本体の温度がボリウム（１１）により設定
された温度に達すると、変換回路（１２）の出力電位が
低くなり比１咬回路（１６）の出力が「ＬＪとなって発
熱体（２）への通電が停止する。Eventually, when the temperature of the instrument body reaches the temperature set by the regulator (11), the output potential of the conversion circuit (12) becomes low and the output of the ratio 1 bit circuit (16) becomes "LJ", and the heating element (2 ) is de-energized.
（ト）発明の効果
本発明は以上の様に、感温層に印加する交流電源電圧を
定電圧回路によって一定にしたものであるから、器具本
体（例えば電気カーペット）に印加される交流電源電圧
が外部要因によって電圧が変動があったとしても正確に
温度設定器によって設定された温度に制御する。この結
果、従来の様に温度設定器が「高」に設定されており器
具本体が「高」になっていても連続して発熱体に通電さ
れるという危険がなくなる。(G) Effects of the Invention As described above, the present invention uses a constant voltage circuit to keep the AC power voltage applied to the temperature-sensitive layer constant, so that the AC power voltage applied to the appliance body (for example, an electric carpet) is constant. Even if the voltage fluctuates due to external factors, the temperature is accurately controlled to the temperature set by the temperature setting device. As a result, there is no danger of the heating element being continuously energized even if the temperature setting device is set to "high" and the appliance body is set to "high" as in the conventional case.
第１図は本発明の温度制御装置に実装する感熱体の側面
図、第２図は同じく電気回路、第３図は各部の波形図を
示すものである。
（１）・・・商用交流電源、（２）・・・発熱体、（４
）・・・感熱体、（５）・・・感温層、（６ａ）、（６
ｂ）・・・導体、（９）・・・基準電圧回路、（１０）
・・・抵抗、（１１）・・・温度設定器、（１２）・・
・変換回路、（１６）・・・比較回路、（１７〉・・・
制御回路、（２３）・・・定電圧回路。
出願人 三洋電機株式会社 外１名
代理人弁理士西野卓嗣（外１名）FIG. 1 is a side view of a heat sensitive body mounted in the temperature control device of the present invention, FIG. 2 is an electric circuit, and FIG. 3 is a waveform diagram of each part. (1)...Commercial AC power supply, (2)...Heating element, (4
)...Thermosensitive body, (5)... Temperature sensitive layer, (6a), (6
b)...Conductor, (9)...Reference voltage circuit, (10)
...Resistance, (11)...Temperature setting device, (12)...
・Conversion circuit, (16)...Comparison circuit, (17>...
Control circuit, (23)...constant voltage circuit. Applicant: Sanyo Electric Co., Ltd. (1 other person) Representative patent attorney Takuji Nishino (1 other person)
Claims (1)
介して一対の導体を添設した感熱体と、抵抗と温度設定
器とからなる基準電圧回路及び前記感温層のインピーダ
ンスの変化を電圧変化に変換する変換回路と、前記基準
電圧回路と変換回路の出力を比較する比較回路と、該比
較回路の出力によって前記発熱体の通電を制御する制御
回路と、前記感温層に印加する交流電源電圧を一定にす
る定電圧回路と、を備えた温度制御装置。(1) A reference voltage circuit consisting of a heating element, a heat sensitive element attached with a pair of conductors via a temperature sensitive layer whose resistance value changes depending on temperature, a resistor and a temperature setting device, and an impedance of the temperature sensitive layer. a conversion circuit that converts a change into a voltage change; a comparison circuit that compares the output of the reference voltage circuit and the conversion circuit; a control circuit that controls energization of the heating element based on the output of the comparison circuit; A temperature control device equipped with a constant voltage circuit that keeps the applied AC power supply voltage constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22201288A JPH0269808A (en) | 1988-09-05 | 1988-09-05 | Temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22201288A JPH0269808A (en) | 1988-09-05 | 1988-09-05 | Temperature controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0269808A true JPH0269808A (en) | 1990-03-08 |
Family
ID=16775726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22201288A Pending JPH0269808A (en) | 1988-09-05 | 1988-09-05 | Temperature controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0269808A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04186027A (en) * | 1990-11-16 | 1992-07-02 | Sharp Corp | Electric carpet |
| CN105116939A (en) * | 2015-07-14 | 2015-12-02 | 华南理工大学 | Aluminum profile passivation process conductivity detection control device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60162130A (en) * | 1984-02-02 | 1985-08-23 | Sharp Corp | Electric carpet |
| JPS60241742A (en) * | 1984-03-23 | 1985-11-30 | 三洋電機株式会社 | Power supply device |
-
1988
- 1988-09-05 JP JP22201288A patent/JPH0269808A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60162130A (en) * | 1984-02-02 | 1985-08-23 | Sharp Corp | Electric carpet |
| JPS60241742A (en) * | 1984-03-23 | 1985-11-30 | 三洋電機株式会社 | Power supply device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04186027A (en) * | 1990-11-16 | 1992-07-02 | Sharp Corp | Electric carpet |
| CN105116939A (en) * | 2015-07-14 | 2015-12-02 | 华南理工大学 | Aluminum profile passivation process conductivity detection control device |
| CN105116939B (en) * | 2015-07-14 | 2017-06-06 | 华南理工大学 | A kind of aluminium section bar passivating process electrical conductivity detection control apparatus |
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