JPH0113122B2 - - Google Patents
Info
- Publication number
- JPH0113122B2 JPH0113122B2 JP16510581A JP16510581A JPH0113122B2 JP H0113122 B2 JPH0113122 B2 JP H0113122B2 JP 16510581 A JP16510581 A JP 16510581A JP 16510581 A JP16510581 A JP 16510581A JP H0113122 B2 JPH0113122 B2 JP H0113122B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- circuit
- wattage
- heating element
- surface heating
- 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
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 13
- 230000010355 oscillation Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Resistance Heating (AREA)
- Feedback Control In General (AREA)
- Control Of Temperature (AREA)
Description
【発明の詳細な説明】
この発明は面発熱体の温度制御装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature control device for a surface heating element.
従来の面発熱体の温度制御装置において、ワツ
ト数切替型のものは、第１および第２のヒータパ
ターンと感熱回路とを有する面発熱体の温度制御
を行うもので、ワツト数切替スイツチを高ワツト
数側に切替えたときは第１および第２のヒータパ
ターンの両方に通電して温度制御を行い、ワツト
数切替スイツチを低ワツト数側に切替えたときは
第１および第２のヒータパターンのいずれか一方
にのみ通電して温度制御を行うように構成されて
いた。 Among conventional temperature control devices for surface heating elements, the wattage switching type controls the temperature of a surface heating element that has first and second heater patterns and a heat-sensitive circuit. When the wattage is switched to the wattage side, both the first and second heater patterns are energized to control the temperature, and when the wattage selector switch is switched to the lower wattage side, the first and second heater patterns are energized. It was configured to control the temperature by supplying electricity to only one of them.
しかし、このような構成では、低ワツト数使用
時に、面発熱体において通電されているヒータパ
ターンに対応する部分と通電されていないヒータ
パターンに対応する部分との温度差が大きくな
り、面発熱体表面に温度むらが生じて不快感を与
えるという問題があつた。 However, in such a configuration, when using a low wattage, the temperature difference between the part of the surface heating element corresponding to the energized heater pattern and the part corresponding to the non-energized heater pattern becomes large, and the surface heating element There was a problem in that temperature unevenness occurred on the surface, causing discomfort.
したがつて、この発明の目的は、ワツト数切替
型のものにおいて低ワツト数使用時の面発熱体表
面の温度むらを少くできる温度制御装置を提供す
ることである。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a temperature control device that can reduce temperature unevenness on the surface of a surface heating element when a low wattage is used in a wattage switching type.
この発明の一実施例を第１図および第２図に基
づいて説明する。 An embodiment of the present invention will be described based on FIGS. 1 and 2.
第１図は、温度制御が行われる面発熱体の断
面図で、１は負の温度インピーダンス特性を有す
るポリアミド系樹脂を用いた感熱素子、２は温度
検出電極、３および３′はそれぞれ温度検出電極
を兼ねる第１および第２のヒータパターン、４お
よび４′は感熱素子１，温度検出電極２およびヒ
ータパターン３，３′を絶縁する絶縁フイルムで
あり、感熱素子１，温度検出電極２およびヒータ
パターン３，３′で感熱回路を構成している。 Figure 1 is a cross-sectional view of a surface heating element for temperature control, where 1 is a heat-sensitive element made of polyamide resin with negative temperature impedance characteristics, 2 is a temperature detection electrode, and 3 and 3' are temperature detection elements, respectively. The first and second heater patterns 4 and 4', which also serve as electrodes, are insulating films that insulate the heat-sensitive element 1, temperature-detecting electrode 2, and heater patterns 3, 3'. Patterns 3 and 3' constitute a heat-sensitive circuit.
この第１図の面発熱体を温度制御するワツト数
切替型の温度制御装置は、第２図に示すように、
感熱回路１，２，３，３′から面発熱体の温度
に対応した温度信号を得る温度検出回路と、こ
の温度検出回路で得た温度信号を設定温度に対
応した基準電圧と比較する比較回路と、電源
と前記第１および第２のヒータパターン３，３′
との間に介挿された前記比較回路の出力に応答
してオンオフすることにより前記面発熱体の温
度を前記設定温度に保持する第１のスイツチング
回路Ｖと、前記第２のヒータパターン３′と前記
第１のスイツチング回路Ｖとの間に介挿されてオ
ンオフすることにより前記面発熱体のワツト数
を切替えるワツト数切替スイツチと、このワツ
ト数切替スイツチのオフに応答して作動する発
振回路と、前記第２のヒータパターン３′と前
記第１のスイツチング回路との間に介挿され前
記発振回路の出力に応答してオンオフする第２
のスイツチング回路とを備えている。 The wattage switching type temperature control device that controls the temperature of the surface heating element shown in Fig. 1 is as shown in Fig. 2.
A temperature detection circuit that obtains a temperature signal corresponding to the temperature of the surface heating element from the heat sensitive circuits 1, 2, 3, and 3', and a comparison circuit that compares the temperature signal obtained by this temperature detection circuit with a reference voltage corresponding to the set temperature. , a power source, and the first and second heater patterns 3, 3'.
a first switching circuit V that maintains the temperature of the surface heating element at the set temperature by turning on and off in response to the output of the comparison circuit inserted between the first switching circuit V and the second heater pattern 3'; and the first switching circuit V to switch the wattage of the surface heating element by turning it on and off, and an oscillation circuit that operates in response to turning off the wattage selection switch. and a second heater pattern interposed between the second heater pattern 3' and the first switching circuit and turned on and off in response to the output of the oscillation circuit.
It is equipped with a switching circuit.
以下、この温度制御装置について詳細に説明す
る。 This temperature control device will be explained in detail below.
(1) ワツト数切替スイツチが高ワツト数側に切
替つている場合、すなわち、接点ａ，ｂ間が接
続されるとともに接点a′，b′間が接続されてい
る場合：電源を投入すると、この電源の電
圧が電源トランスTR1を介して定電圧回路CV
に与えられ、定電圧回路CVは直流電圧VDを出
力し、この直流電圧VDにより高周波発振回路
OSCが作動して発振出力Ｖを電圧分割コンデ
ンサC1を介して温度検出電極２とヒータパタ
ーン３，３′間に印加する。このときに、温度
検出電極２に得られる電圧は、感熱素子１がそ
のときの温度に対応してインピーダンスを変化
させることにより温度信号となり、フイルタＦ
を介して比較回路に加えられる。比較回路
は、この温度信号と設定温度に対応する基準電
圧とを比較し、温度信号の方が小さいとき（設
定温度より高いとき）に出力が「Ｌ」となり、
逆の場合に出力が「Ｈ」となる。スイツチング
トランジスタQ1は抵抗Ｒを介して「Ｈ」レベ
ルの電圧が加えられたときにオンとなつてリレ
ーRY1を励磁することによりそのリレー接点
ry1a，ry1bをオンにしてヒータパターン３，
３′へ電源から連続通電し、「Ｌ」レベルの電
圧が加えられたときにオフとなつてリレーRY1
の励磁を停止してリレー接点ry1a，ry1bを開成
させることによりヒータパターン３，３′への
通電を停止する。上記動作より面発熱体の温
度が設定温度に保持される。(1) When the wattage selector switch is switched to the high wattage side, that is, when contacts a and b are connected and contacts a' and b' are also connected: When the power is turned on, this The voltage of the power supply is passed through the power transformer TR 1 to the constant voltage circuit CV
is given, the constant voltage circuit CV outputs a DC voltage V D , and this DC voltage V D causes the high frequency oscillation circuit to
The OSC operates and applies the oscillation output V between the temperature detection electrode 2 and the heater patterns 3 and 3' via the voltage dividing capacitor C1 . At this time, the voltage obtained at the temperature detection electrode 2 becomes a temperature signal by changing the impedance of the heat-sensitive element 1 according to the temperature at that time, and the voltage obtained at the temperature detection electrode 2 becomes a temperature signal.
is applied to the comparator circuit via. The comparison circuit compares this temperature signal with a reference voltage corresponding to the set temperature, and when the temperature signal is smaller (higher than the set temperature), the output becomes "L",
In the opposite case, the output becomes "H". Switching transistor Q1 turns on when an "H" level voltage is applied through resistor R, energizing relay RY1 , thereby opening its relay contact.
Turn on ry 1a and ry 1b and set heater pattern 3,
3' is continuously energized from the power supply, and when "L" level voltage is applied, it turns off and relay RY 1
By stopping the excitation and opening the relay contacts ry 1a and ry 1b , the energization to the heater patterns 3 and 3' is stopped. Through the above operation, the temperature of the surface heating element is maintained at the set temperature.
(2) ワツト数切替スイツチが低ワツト数側に切
替つている場合、すなわち、接点ｂ，ｃ間が接
続されるとともに接点b′，c′間が接続されてい
る場合：電源を投入すると、(1)の場合と同様
に温度信号が得られ、比較回路も同様に動作
する。スイツチングトランジスタQ1は「Ｈ」
レベルの電圧が加えられたときにオンとなつて
リレーRY1を励磁することによりそのリレー接
点ry1a，ry1bをオンにしてヒータパターン３へ
電源から連続通電する。これと同時に、電源
の電圧がリレー接点ry1a，ry1b，ワツト数切
替スイツチおよび電源トランスTR2を介して
ダイオードD1およびコンデンサC2で整流およ
び平滑され、得られた直流電圧VDDが発振回路
に加えられ、それにより発振回路が周期的
に「Ｈ」と「Ｌ」の電圧を発生し、この電圧に
よりスイツチングトランジスタQ2がオンオフ
を繰返し、このスイツチングトランジスタQ2
のオンオフに応答してリレーRY2のリレー接点
ry2a，ry2bがオンオフを繰返し、電源からヒ
ータパターン３′へ周期的に間欠通電される。
一方、スイツチングトランジスタQ1に「Ｌ」
レベルの電圧が加えられたときは、リレーRY1
の励磁が停止してリレー接点ry1a，ry1bがオフ
となり、ヒータパターン３，３′への通電を停
止する。上記動作により面発熱体が設定温度
に保持される。(2) When the wattage selector switch is set to the low wattage side, that is, when contacts b and c are connected and contacts b' and c' are also connected: When the power is turned on, ( A temperature signal is obtained in the same way as in case 1), and the comparison circuit operates in the same way. Switching transistor Q1 is “H”
When a level voltage is applied, the relay RY 1 is turned on and energized, thereby turning on the relay contacts ry 1a and ry 1b , and continuously energizing the heater pattern 3 from the power source. At the same time, the power supply voltage is rectified and smoothed by diode D 1 and capacitor C 2 via relay contacts ry 1a , ry 1b , wattage selector switch, and power transformer TR 2 , and the resulting DC voltage V DD oscillates. The oscillation circuit periodically generates "H" and "L" voltages, and this voltage repeatedly turns on and off the switching transistor Q2 .
Relay contacts of relay RY 2 in response to on/off of
ry 2a and ry 2b are repeatedly turned on and off, and power is periodically and intermittently supplied from the power source to the heater pattern 3'.
On the other hand, switching transistor Q1 is set to "L".
When a level voltage is applied, relay RY 1
excitation is stopped, relay contacts ry 1a and ry 1b are turned off, and energization to heater patterns 3 and 3' is stopped. The above operation maintains the surface heating element at the set temperature.
なお、D2およびD3はそれぞれダイオードであ
る。 Note that D 2 and D 3 are each diodes.
このように、この実施例の温度制御装置は、低
ワツト数使用時においても、ヒータパターン３′
に間欠通電を行うようにしたため、低ワツト数使
用時におけるヒータパターン３，３′間の温度差
が少くなり、面発熱体の表面の温度むらを少く
できる。 In this way, the temperature control device of this embodiment can control the heater pattern 3' even when using a low wattage.
Since intermittent energization is carried out, the temperature difference between the heater patterns 3 and 3' is reduced when a low wattage is used, and temperature unevenness on the surface of the surface heating element can be reduced.
以上のように、この発明の温度制御装置は、第
１および第２のヒータパターンおよび感熱回路を
有する面発熱体を温度制御する温度制御装置であ
つて、前記感熱回路から前記面発熱体の温度に対
応した温度信号を得る温度検出回路と、この温度
検出回路で得た温度信号を設定温度に対応した基
準電圧と比較する比較回路と、電源と前記第１お
よび第２のヒータパターンとの間に介挿され前記
比較回路の出力に応答してオンオフすることによ
り前記面発熱体の温度を前記設定温度に保持する
第１のスイツチング回路と、前記第２のヒータパ
ターンと前記第１のスイツチング回路との間に介
挿されてオンオフすることにより前記面発熱体の
ワツト数を切替えるワツト数切替スイツチと、こ
のワツト数切替スイツチのオフに応答して作動す
る発振回路と、前記第２のヒータパターンと前記
第１のスイツチング回路との間に介挿され前記発
振回路の出力に応答してオンオフする第２のスイ
ツチング回路とを備えているので、低ワツト数使
用時の面発熱体表面の温度むらを少くできるとい
う効果がある。 As described above, the temperature control device of the present invention is a temperature control device that controls the temperature of a surface heating element having first and second heater patterns and a heat-sensitive circuit, and in which the temperature of the surface heating element is a temperature detection circuit that obtains a temperature signal corresponding to the set temperature; a comparison circuit that compares the temperature signal obtained by the temperature detection circuit with a reference voltage corresponding to the set temperature; and a power supply and the first and second heater patterns. a first switching circuit that is inserted into the first switching circuit and maintains the temperature of the surface heating element at the set temperature by turning on and off in response to the output of the comparison circuit, the second heater pattern and the first switching circuit; a wattage changeover switch that is inserted between the wattage changeover switch and the wattage changeover switch that switches the wattage of the surface heating element by turning it on and off; an oscillation circuit that operates in response to turning off the wattage changeover switch; and the second heater pattern. and a second switching circuit that is inserted between the oscillation circuit and the first switching circuit and turns on and off in response to the output of the oscillation circuit. This has the effect of reducing the amount of
第１図は面発熱体の断面図、第２図はこの発明
の一実施例の回路図である。
Ｉ…面発熱体、１…感熱素子、２…温度検出電
極、３，３′…ヒータパターン、…温度検出回
路、…比較回路、…電源、…第１のスイツ
チング回路、…ワツト数切替スイツチ、…発
振回路、…第２のスイツチング回路。
FIG. 1 is a sectional view of a surface heating element, and FIG. 2 is a circuit diagram of an embodiment of the present invention. I...plane heating element, 1...thermal element, 2...temperature detection electrode, 3,3'...heater pattern,...temperature detection circuit,...comparison circuit,...power supply,...first switching circuit,...wattage selection switch, ...oscillation circuit, ...second switching circuit.
Claims (1)
回路を有する面発熱体を温度制御する温度制御装
置であつて、前記感熱回路から前記面発熱体の温
度に対応した温度信号を得る温度検出回路と、こ
の温度検出回路で得た温度信号を設定温度に対応
した基準電圧と比較する比較回路と、電源と前記
第１および第２のヒータパターンとの間に介挿さ
れ前記比較回路の出力に応答してオンオフするこ
とにより前記面発熱体の温度を前記設定温度に保
持する第１のスイツチング回路と、前記第２のヒ
ータパターンと前記第１のスイツチング回路との
間に介挿されてオンオフすることにより前記面発
熱体のワツト数を切替えるワツト数切替スイツチ
と、このワツト数切替スイツチのオフに応答して
作動する発振回路と、前記第２のヒータパターン
と前記第１のスイツチング回路との間に介挿され
前記発振回路の出力に応答してオンオフする第２
のスイツチング回路とを備えた温度制御装置。1 A temperature control device for controlling the temperature of a surface heating element having first and second heater patterns and a thermal circuit, the temperature detection circuit obtaining a temperature signal corresponding to the temperature of the surface heating element from the thermal circuit; A comparator circuit that compares the temperature signal obtained by the temperature detection circuit with a reference voltage corresponding to the set temperature, and a comparator circuit that is inserted between the power supply and the first and second heater patterns and responds to the output of the comparator circuit. a first switching circuit that maintains the temperature of the surface heating element at the set temperature by turning it on and off; and a first switching circuit that is inserted between the second heater pattern and the first switching circuit and turning it on and off. A wattage changeover switch that changes the wattage of the surface heating element, an oscillation circuit that operates in response to turning off the wattage changeover switch, and an intervening circuit between the second heater pattern and the first switching circuit. A second oscillator circuit is inserted and turns on and off in response to the output of the oscillation circuit.
Temperature control device equipped with a switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16510581A JPS5866124A (en) | 1981-10-15 | 1981-10-15 | Temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16510581A JPS5866124A (en) | 1981-10-15 | 1981-10-15 | Temperature controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5866124A JPS5866124A (en) | 1983-04-20 |
| JPH0113122B2 true JPH0113122B2 (en) | 1989-03-03 |
Family
ID=15805984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16510581A Granted JPS5866124A (en) | 1981-10-15 | 1981-10-15 | Temperature controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5866124A (en) |
-
1981
- 1981-10-15 JP JP16510581A patent/JPS5866124A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5866124A (en) | 1983-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0113122B2 (en) | ||
| JPS6045444B2 (en) | temperature control circuit | |
| US3475593A (en) | Method and arrangement for periodically connecting and disconnecting a heating unit | |
| JPH11168367A (en) | Contact input device | |
| JPS6328875Y2 (en) | ||
| JPS6039998Y2 (en) | Temperature control circuit for sheet heating element | |
| JPS6039997Y2 (en) | Temperature control circuit for sheet heating element | |
| JPS6352334B2 (en) | ||
| JP3567145B2 (en) | Induction heating rice cooker | |
| JPS5876912A (en) | Temperature controller | |
| JPH05184160A (en) | Discharge lamp lighting circuit | |
| JPS6036071B2 (en) | Temperature control circuit for sheet heating element | |
| JPS5824815U (en) | Temperature control circuit for electric heating equipment | |
| JPH04206190A (en) | Cooking plate for elecrtomagnetic induction heater | |
| JPS6219917A (en) | Temperature control circuit for heater | |
| JPH0323804Y2 (en) | ||
| JPH10156A (en) | Power supply control circuit for electric water heater | |
| RU1788604C (en) | Device for power supply of cathode heater | |
| JPH051158Y2 (en) | ||
| JPH0347133Y2 (en) | ||
| JPH0619332Y2 (en) | Power supply circuit | |
| KR870002214Y1 (en) | Electric heating device | |
| JPH07139746A (en) | Electric carpet controller | |
| JPS5841995U (en) | electric heating device | |
| JPS62246084A (en) | Fixing device |