JPS62109111A - Temperature controller for electric heater - Google Patents

Abstract

PURPOSE:To vary the temperature of a heating element in response to a room temperature and to always secure a pleasant level of temperature, by generating the temperature setting voltage with serial connection of plural diodes and resistances and varying said temperature setting voltage according to the change of the forward voltage of the diode produced by the change of the room temperature as well as the number of conductive diodes. CONSTITUTION:The temperature setting voltage VS is minimum at the position 1 of a changeover switch 41 and diodes 36-40 all conduct at the position 1 of the switch 41. Then the diodes 37-40 conduct at the position 2 of the switch 41. In such a way, the number of conductive diodes are successively reduced. Then the forward voltage is increased with diodes 36-40 as the room temperature is reduced. While the voltage VS is reduced with the temperature of a heating element 2 is increased. Thus the temperature of the element 2 is varied in response to the room temperature. Therefore it is no required for an operator to increase the setting level of temperature in response to the drop of the room temperature.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、電気毛布、電気カーペット等の電気暖房器の
温度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 temperature control device for electric heaters for electric blankets, electric carpets, etc.

従来の技術 従来の電気毛布、電気カーペット等の電気暖房器の温度
制御装置を第３図に従って説明する。2. Description of the Related Art A conventional temperature control device for electric heaters for electric blankets, electric carpets, etc. will be explained with reference to FIG.

図において、１は交流電源、２は発熱体、３は温度セン
サで前記発熱体２と熱的に接続され、電極線４、Ｓと、
電極線４と５の間に介装された感温素子６とからなり、
電極線４と５の間のインピーダンスは、負の温度特性を
示す。７は温度検出回路で８．９．１０の抵抗、１１の
ダイオード、１２のコンデンサで構成し、前記温度セン
サ３と抵抗８で分割して得られる電圧を抵抗９を介して
ダイオード１１で整流し、コンデンサ１２で平滑して湿
度検出電圧Ｖ７を出力する。１３は直流電源回路で、ダ
イオード１４、抵抗１５、コンデンサ１６で構成され、
直流電源電圧を出力する。In the figure, 1 is an AC power supply, 2 is a heating element, 3 is a temperature sensor which is thermally connected to the heating element 2, and electrode wires 4, S,
It consists of a temperature sensing element 6 interposed between electrode wires 4 and 5,
The impedance between electrode wires 4 and 5 exhibits negative temperature characteristics. 7 is a temperature detection circuit, which is composed of a resistor 8.9.10, a diode 11, and a capacitor 12, and the voltage obtained by dividing the temperature sensor 3 and the resistor 8 is rectified by the diode 11 via the resistor 9. , the humidity detection voltage V7 is output after being smoothed by a capacitor 12. 13 is a DC power supply circuit, which is composed of a diode 14, a resistor 15, and a capacitor 16;
Outputs DC power supply voltage.

１７は温度設定回路で抵抗１８．１９．２０、可変抵抗
器２１で構成され、温度設定重圧Ｖ３　’ｃ小出力る。Reference numeral 17 denotes a temperature setting circuit, which is composed of resistors 18, 19, and 20 and a variable resistor 21, and outputs a small temperature setting pressure V3'c.

抵抗１８は、可変抵抗器２１の抵抗値変化による直流電
源電圧の変動を小さくする。２２は比較器で、温度検出
回路７の温度検出重圧ｖＴと温度設定回路１７の温度設
定電圧ｖｓを比較する。２３はトランジスタで比較器２
２の出力により抵抗２４を介して信号が伝送され動作す
る。The resistor 18 reduces fluctuations in the DC power supply voltage due to changes in the resistance value of the variable resistor 21. A comparator 22 compares the temperature detection pressure vT of the temperature detection circuit 7 with the temperature setting voltage vs of the temperature setting circuit 17. 23 is a transistor and comparator 2
A signal is transmitted through the resistor 24 by the output of 2, and the circuit operates.

２５はリレーコイル部で、トランジスタ２３の信号によ
りオン、オフする。２６はリレーコイル部２５のリレー
電源回路で、ダイオード２７、抵抗２８、コンデンサ２
９で構成される。３０は逆起電力吸収用ダイオード、３
１はリレーコイル部２５の動作によりオン、オフするリ
レー接点部であり、発熱体２への通電を制御する。リレ
ーコイル部２５とリレー接点部３１で電力制御素子を構
成する。Reference numeral 25 denotes a relay coil section, which is turned on and off by a signal from the transistor 23. 26 is a relay power supply circuit for the relay coil section 25, which includes a diode 27, a resistor 28, and a capacitor 2.
Consists of 9. 30 is a diode for absorbing back electromotive force, 3
Reference numeral 1 denotes a relay contact section that is turned on and off by the operation of the relay coil section 25, and controls the supply of electricity to the heating element 2. The relay coil section 25 and the relay contact section 31 constitute a power control element.

と記構酸において、発熱体２の温度は、温度センサ３で
検出され、温度検出回路７で直流の温度信号電圧ＶＴ　
となる。温度検出電圧Ｖ７は、発熱体２の温度が低い時
は、温度センサ３のインピーダンスが大きくなり、高い
値を示し、発熱体２の温度が高い時は温度センサ３のイ
ンピーダンスが小さくなシ、低い値を示し、比較器２２
の非反転入力端子（＋に入力される。一方、比較器２２
の反転入力端子（−）へは、温度設定回路１７の温度設
定電圧■ｓが入力され、温度設定電圧ｖｓは、発熱体２
の設定温度可変手段である可変抵抗器２１の抵抗値によ
り変化する。比較器２２は、（温度検出電圧ＶＴ）＞（
温度設定電圧ＶＢ）の条件下、すなわち、発熱体２の温
度が設定よりも低い時はＨｉ高出力（温度検出電圧ｖＴ
）く（温度設定電圧ＶＢ）の条件下、すなわち、発熱体
２の温度が設定よりも高い時はＬｏ　出力となる。トラ
ンジスタ２３は比較器２２がＨｉ　出力の時、オンとな
りリレーコイル部２５に電流が流れ、リレー接点部３１
がオンし発熱体２へ通電されるものである。In the structure described above, the temperature of the heating element 2 is detected by a temperature sensor 3, and the temperature detection circuit 7 detects a direct current temperature signal voltage VT.
becomes. When the temperature of the heating element 2 is low, the impedance of the temperature sensor 3 becomes large and the temperature detection voltage V7 shows a high value, and when the temperature of the heating element 2 is high, the impedance of the temperature sensor 3 is small and shows a low value. comparator 22
is input to the non-inverting input terminal (+) of the comparator 22.
The temperature setting voltage ■s of the temperature setting circuit 17 is input to the inverting input terminal (-) of the heating element 2.
It changes depending on the resistance value of the variable resistor 21, which is a set temperature variable means. The comparator 22 calculates (temperature detection voltage VT)>(
Under the condition of temperature setting voltage VB), that is, when the temperature of the heating element 2 is lower than the setting, Hi high output (temperature detection voltage VT
) (temperature setting voltage VB), that is, when the temperature of the heating element 2 is higher than the setting, the output is Lo. When the comparator 22 outputs Hi, the transistor 23 is turned on, current flows through the relay coil section 25, and the relay contact section 31
is turned on and the heating element 2 is energized.

発明が解決しようとする問題点 ところが、このような電気暖房器の温度制御装置は、使
用している場所の室温が低下した場合においては、発熱
体の温度は一定かもしくは低下する方向であるため、使
用者は、室温低下にともない温度設定を高くする必要が
ある。また、電気毛布においては、睡眠初期には快適で
あっても、−日の内で最も気温が低くなる朝方の冷込み
時には寒く感じるという問題があった。Problems to be Solved by the Invention However, with such a temperature control device for an electric heater, when the room temperature in the place where it is used decreases, the temperature of the heating element remains constant or tends to decrease. , the user needs to increase the temperature setting as the room temperature decreases. Another problem with electric blankets is that even if they are comfortable during the early stages of sleep, they feel cold during the cold morning hours when the temperature is the lowest during the day.

本発明はこのような従来の問題点を解消するものであり
、快適な電気暖房器を提供するものである。The present invention solves these conventional problems and provides a comfortable electric heater.

問題点を解決するだめの手段 本発明の電気暖房器の温度制御装置は、複数のダイオー
ドと抵抗の直列接続で構成し、前記ダイオードの通電数
と室温変化による前記ダイオードの順方向電圧変化によ
り可変する温度設定電圧を出力する温度設定回路とした
ものである。Means for Solving the Problems The temperature control device for an electric heater of the present invention is composed of a plurality of diodes and resistors connected in series, and is variable by the number of energized diodes and the change in the forward voltage of the diodes due to changes in room temperature. This is a temperature setting circuit that outputs a temperature setting voltage.

作　　用 本発明の電気暖房器の温度制御装置は、発熱体の温度を
設定する温度設定回路の温度設定電圧を、複数のダイオ
ードと抵抗の直列接続で発生し、前記ダイオードの通電
数と室温変化による前記ダイオードの順方向電圧変化に
より可変することにより、室温に応じて発熱体の温度を
可変し、いつでも快適な温度が得られるものである。Function: The temperature control device for an electric heater of the present invention generates a temperature setting voltage for a temperature setting circuit that sets the temperature of a heating element by connecting a plurality of diodes and a resistor in series, and adjusts the number of energizations of the diodes and changes in room temperature. By changing the forward voltage of the diode, the temperature of the heating element can be changed according to the room temperature, and a comfortable temperature can be obtained at any time.

また、ダイオードの通電数を切換えることにより発熱体
の温度を好みに応じて設定できると共に、温度センサの
特性は、低温側においてはＢ定数が小さく、高温側では
Ｂ定数が大きくなっているため、室温変化により変化す
る温度設定電圧の変化量が一定であれば発熱体の温度設
定が高温側と低温側では、室温に対する発熱体温度の変
化量が大きく異なるため、発熱体の温度設定が低くなる
に従ってダイオードの通電数を削減し、室温変化に対す
る温度設定電圧の変化量を小さくして行き室温に対する
発熱体温度の変化量を発熱体の温度設定位置に関係なく
一定にすべく補正しうるものである。In addition, by switching the number of energized diodes, you can set the temperature of the heating element according to your preference, and the characteristics of the temperature sensor are that the B constant is small on the low temperature side and large on the high temperature side. If the amount of change in the temperature setting voltage that changes due to changes in room temperature is constant, the amount of change in temperature of the heating element with respect to room temperature will be significantly different between the high temperature side and the low temperature side, so the temperature setting of the heating element will be lower. Accordingly, by reducing the number of energized diodes and reducing the amount of change in temperature setting voltage with respect to changes in room temperature, it is possible to correct the amount of change in heating element temperature with respect to room temperature to be constant regardless of the temperature setting position of the heating element. be.

実施例 以下、本発明の一実施例の暖房器の温度制御装置を図面
を参照して説明する。尚、同一部品には同一番号を付与
し、従って動作についても同じであるので省略する。Embodiment Hereinafter, a temperature control device for a heater according to an embodiment of the present invention will be explained with reference to the drawings. It should be noted that the same parts are given the same numbers and their operations are also the same, so their description will be omitted.

第１図において、３２は温度設定回路で抵抗３３．３４
．３５、ダイオード３６．３７．３８．３９．４０、切
換えスイッチ４１とからなっている。In Figure 1, 32 is a temperature setting circuit and a resistor 33.34
．． 35, diodes 36, 37, 38, 39, 40, and a changeover switch 41.

上記構成において、第１図及び第２図に従ってその動作
を説明する。抵抗ａ３はダイオードの通電数によシ直流
電源回路１３の直流電源電圧の変動をおさえている。発
熱体２の設定温度は、切換えスイッチ４１の動作により
行なう。切換えスイッチ４１の１位置は発熱体２の温度
が最も高くなる位置で、２位置、３位置、４位置、５位
置と順次低い温度設定となる。この時の温度設定室ＥＥ
Ｖ！３は、切換えスイッチ４１の１位置が最も低い電圧
となる。そして切換えスイッチ４１の１位置はダイオー
ド３６．３７、ａ８．３９．４０と全テＩｃ通電され、
２位置ではダイオード３７．３８．３９．４０というよ
うに順次ダイオードの通電数が削減する。次に室温に対
する温度設定回路の動作について説明する。室温が低く
なるに従ってダイオード３６．３７．３８．３９．４０
の順方向電圧が大きくなシ温度設定電圧ＶＳは低くなっ
て、発熱体２の温度が高くなることとなる。室温変化に
よる温度設定電圧ＶＳの変化量は、通電されるダイオー
ドの数が多いほど大きくなる。第２図に室温変化に対す
る温度設定電圧Ｖ３の特性を示す。The operation of the above configuration will be explained according to FIGS. 1 and 2. The resistor a3 suppresses fluctuations in the DC power supply voltage of the DC power supply circuit 13 depending on the number of energized diodes. The set temperature of the heating element 2 is determined by operating the changeover switch 41. The 1st position of the changeover switch 41 is the position where the temperature of the heating element 2 is the highest, and the temperature is successively lowered to the 2nd, 3rd, 4th, and 5th positions. Temperature setting room EE at this time
V! 3, the 1st position of the changeover switch 41 has the lowest voltage. When the changeover switch 41 is in the 1 position, the diodes 36, 37, a8, 39, and 40 are all energized.
At the 2nd position, the number of energized diodes is sequentially reduced, such as diodes 37, 38, 39, and 40. Next, the operation of the temperature setting circuit with respect to room temperature will be explained. Diode 36.37.38.39.40 as the room temperature decreases
When the forward voltage is large, the temperature setting voltage VS becomes low, and the temperature of the heating element 2 becomes high. The amount of change in the temperature setting voltage VS due to changes in room temperature increases as the number of energized diodes increases. FIG. 2 shows the characteristics of the temperature setting voltage V3 with respect to room temperature changes.

一方、温度センサ３は高温側に比較して低温側はＢ定数
が小さくなる特性を示し、従って温度センサ３の信号を
検出する温度検出回路７の温度検出電圧ＶＴも発熱体２
の温度が高温側においては変化が大きく、低温側におい
ては小さくなる。ゆえに、発熱体２の温度設定が高温側
においては、通電するダイオードの数を可変することに
より温度設定電圧Ｖ、の室温に対する変化量を大きく、
低温側においては小さくすることにより発熱体２の温度
設定位置に関係なく室温に対する発熱体２の温度変化を
一定にすべく補正する。On the other hand, the temperature sensor 3 exhibits a characteristic that the B constant is smaller on the low temperature side than on the high temperature side, and therefore the temperature detection voltage VT of the temperature detection circuit 7 that detects the signal of the temperature sensor 3 is also
The change is large on the high temperature side, and small on the low temperature side. Therefore, when the temperature setting of the heating element 2 is on the high temperature side, by varying the number of energized diodes, the amount of change in the temperature setting voltage V with respect to room temperature can be increased.
On the low temperature side, the temperature change of the heating element 2 with respect to the room temperature is corrected to be constant by making it smaller regardless of the temperature setting position of the heating element 2.

発明の効果 以とのように本発明の電気暖房器の温度制御装置は、発
熱体の温度を設定する温度設定電圧を、複数のダイオー
ドと抵抗の直列接続で発生し、前記ダイオードの通電数
と室温変化による前記ダイオードの順方向電圧変化によ
り可変することによシ、室温に応じて発熱体の温度が可
変するので使用者は、室温低下にともない温度設定を高
くする必要がなく、また、電気毛布等においては、朝方
等の気温が低くなる時でも快適な睡眠が得られるもので
ある。As described above, the temperature control device for an electric heater of the present invention generates a temperature setting voltage for setting the temperature of a heating element by connecting a plurality of diodes and a resistor in series, and the temperature control device for an electric heater of the present invention generates a temperature setting voltage for setting the temperature of a heating element by connecting a plurality of diodes and a resistor in series. By changing the forward voltage of the diode due to changes in room temperature, the temperature of the heating element changes according to the room temperature, so the user does not have to increase the temperature setting as the room temperature drops, and the electricity Blankets and the like allow a comfortable sleep even when the temperature is low, such as in the morning.

また、ダイオードの通電数を切換えることにより発熱体
の温度を好みに応じて設定できると共に、温度−！ンサ
の高温側ではＢ定数が大きく、低温側ではＢ定数が小さ
い特性の補正ができ、発熱体の温度設定位置に関係なく
室温に対する発熱体の温度変化を一定にすべく動作する
効果ｔも有しており使用ときわめて有利なものである。In addition, by switching the number of energized diodes, you can set the temperature of the heating element according to your preference, and the temperature -! It is possible to correct the characteristic that the B constant is large on the high temperature side of the sensor and small on the low temperature side, and it also has the effect of operating to keep the temperature change of the heating element constant with respect to room temperature regardless of the temperature setting position of the heating element. It is very advantageous to use it.

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

第１図は本発明の一実施例における電気暖房器の温度制
御装置の回路図、第２図はその温度設定電圧ｖｓ特性図
、第３図は従来の電気暖房器の温度制御装置の回路図で
ある。 ２・・・・・・発熱体、３・・・・・・温度センサ、７
・・・・・・温度検出回路、１３・・・・・・直流電源
回路、２２・・・・・・比較器、２５・・・・・・リレ
ーコイル部、３１・・・・・・リレー接点部、３２・・
・・・・温度設定回路、３３．３４．３５・・・・・・
抵抗、３６．３７．３８．３９．４０・・・・・・ダイ
オード、４１・・・・・・切換えスイッチ。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名第　
１　図 第２図 一宣ａ尚）− 第３図Fig. 1 is a circuit diagram of a temperature control device for an electric heater according to an embodiment of the present invention, Fig. 2 is a temperature setting voltage vs. characteristic diagram thereof, and Fig. 3 is a circuit diagram of a conventional temperature control device for an electric heater. It is. 2... Heating element, 3... Temperature sensor, 7
... Temperature detection circuit, 13 ... DC power supply circuit, 22 ... Comparator, 25 ... Relay coil section, 31 ... Relay Contact part, 32...
...Temperature setting circuit, 33.34.35...
Resistor, 36.37.38.39.40...diode, 41...changeover switch. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2 Figure 1 (a) - Figure 3

Claims (1)

【特許請求の範囲】[Claims] 発熱体と、この発熱体の温度を検出する温度センサと、
前記温度センサの信号を検出し、温度検出値を出力する
温度検出回路と、前記発熱体の動作温度を設定する温度
設定値を出力する温度設定回路と、前記温度検出回路出
力と前記温度設定回路出力を比較し前記発熱体の通電を
制御する電力制御素子へ制御信号を出力する制御回路と
を有し、前記温度設定回路は、複数のダイオードと抵抗
の直列接続で構成し、前記ダイオードの通電数と室温変
化による前記ダイオードの順方向電圧変化により可変す
る温度設定電圧を出力する構成とした電気暖房器の温度
制御装置。A heating element, a temperature sensor that detects the temperature of this heating element,
a temperature detection circuit that detects a signal from the temperature sensor and outputs a temperature detection value; a temperature setting circuit that outputs a temperature setting value that sets the operating temperature of the heating element; and an output of the temperature detection circuit and the temperature setting circuit. and a control circuit that compares outputs and outputs a control signal to a power control element that controls energization of the heating element, and the temperature setting circuit includes a plurality of diodes and a resistor connected in series, A temperature control device for an electric heater configured to output a temperature setting voltage that is variable according to a change in the forward voltage of the diode due to a change in temperature and a change in room temperature.