JPH0340473B2 - - Google Patents
Info
- Publication number
- JPH0340473B2 JPH0340473B2 JP15829685A JP15829685A JPH0340473B2 JP H0340473 B2 JPH0340473 B2 JP H0340473B2 JP 15829685 A JP15829685 A JP 15829685A JP 15829685 A JP15829685 A JP 15829685A JP H0340473 B2 JPH0340473 B2 JP H0340473B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- resin film
- auxiliary conductive
- temperature detection
- sensitive
- 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
- 239000011347 resin Substances 0.000 claims description 37
- 229920005989 resin Polymers 0.000 claims description 37
- 238000001514 detection method Methods 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 24
- 239000011888 foil Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 6
- 230000010287 polarization Effects 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Substances [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Landscapes
- Surface Heating Bodies (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は電気カーペツト等に用いられる感熱面
状発熱体に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a heat-sensitive sheet heating element used in electric carpets and the like.
（背景技術）
従来、この種の感熱面状発熱体は、温度に対し
て負のインピーダンス特性を有する感熱樹脂フイ
ルム上に発熱線路および温度検出電極が配設さ
れ、感熱樹脂フイルムを介して発熱線路に結合さ
れた温度検出電極を発熱線路の一端に接続し、発
熱線路に商用電源から電力を供給して発熱させる
と共に、発熱線路から感熱電極に感熱樹脂フイル
ムを介して流れる商用周波電流（以下、センサ電
流という）によつて温度信号を得、この温度信号
が所定値になるように発熱線路への通電を制御し
て温度制御を行なうものである。(Background Art) Conventionally, in this type of heat-sensitive sheet heating element, a heat-generating line and a temperature detection electrode are disposed on a heat-sensitive resin film having a negative impedance characteristic with respect to temperature, and the heat-generating line is connected through the heat-sensitive resin film. A temperature detection electrode coupled to the heating line is connected to one end of the heating line, and power is supplied to the heating line from a commercial power source to generate heat, and a commercial frequency current (hereinafter referred to as A temperature signal is obtained from a sensor current (referred to as a sensor current), and temperature control is performed by controlling the energization of the heating line so that this temperature signal becomes a predetermined value.
この従来の感熱面状発熱体を第４図ないし第７
図に基ずいて説明すると、まず第４図および第５
図において１１は負の温度−インピーダンス特
性、すなわち温度の上昇につれてインピーダンス
が低下する特性を有するナイロン樹脂等の感熱樹
脂フイルムを示しており、この感熱樹脂フイルム
１１の片面には、アルミニウム箔の如き金属箔か
らなる発熱線路１２および発熱線路としても使用
可能な温度検出電極１３が並設され、また、感熱
樹脂フイルム１１の他面には、アルミニウム箔の
如き金属箔からなる比較的小面積の補助導電板１
４が、感熱樹脂フイルム１１を介して発熱線路１
２および温度検出電極１３の双方に対面するよう
に多数、配設されている。更に、発熱線路１２お
よび温度検出電極１３の表面と補助導電板１４の
表面とには絶縁フイルム１５，１６がそれぞれ形
成されている。 This conventional heat-sensitive sheet heating element is shown in Figures 4 to 7.
To explain based on the figures, first, Figures 4 and 5.
In the figure, numeral 11 indicates a thermosensitive resin film such as nylon resin which has a negative temperature-impedance characteristic, that is, the impedance decreases as the temperature rises. A heating line 12 made of foil and a temperature detection electrode 13 which can also be used as a heating line are arranged side by side, and on the other side of the thermosensitive resin film 11 there is a relatively small area auxiliary conductor made of metal foil such as aluminum foil. Board 1
4 is a heating line 1 via a thermosensitive resin film 11
A large number of the electrodes are arranged so as to face both the temperature detection electrode 2 and the temperature detection electrode 13. Further, insulating films 15 and 16 are formed on the surfaces of the heat generating line 12 and the temperature detection electrode 13, and on the surface of the auxiliary conductive plate 14, respectively.
ここで、感熱樹脂フイルム１１は局部断熱時の
温度検出能力を向上させるべく電気的特性を改善
するために、KI（ヨウ化カリウム）等の添加物が
添加されている場合が多い。このため、感熱樹脂
フイルム１１の両面に電圧を印加すると上記添加
物が分極を起こし、第６図に示すように本来のイ
ンピーダンス−温度特性が得られなくなつて局部
断熱時の温度検出能力が低下する欠点があつた。
この分極は印加される電圧および雰囲気温度が高
いほど大きくなる。この分極による感熱樹脂フイ
ルム１１の変質限界曲線を概略的に示すと第７図
に示すとおりである。 Here, additives such as KI (potassium iodide) are often added to the thermosensitive resin film 11 in order to improve the electrical characteristics in order to improve the temperature detection ability during local insulation. Therefore, when a voltage is applied to both sides of the thermosensitive resin film 11, the above-mentioned additive causes polarization, and as shown in FIG. 6, the original impedance-temperature characteristic cannot be obtained, and the temperature detection ability during local insulation is reduced. There was a drawback.
This polarization becomes larger as the applied voltage and ambient temperature become higher. The deterioration limit curve of the thermosensitive resin film 11 due to this polarization is schematically shown in FIG.
そして、第４図および第５図に示す従来例にお
いて、発熱線路１２と補助導電板１４との対向面
積を例えば3So、温度検出電極１３と補助導電板
１４との対向面積をSoとすると、局部断熱時に
これらの対向部分に挾まれる感熱樹脂フイルム１
１の温度がほぼ等しいという前提のもとで、対向
部分に挾まれた感熱樹脂フイルム１１のインピー
ダンスの比は１：３となる。この時、発熱線路１
２と温度検出電極１３間の電位差を100Vとする
と、発熱線路１２と補助導電板１４間には25V、
温度検出電極１３と補助導電板１４間には75Vの
電位差が生じる。このため、局部断熱等によつて
第７図に示した変質限界曲線の75Vの時の温度
T75以上に感熱樹脂フイルム１１が温度上昇する
と、前述した分極による変質を生じ、局部断熱時
の温度検出能力が低下するものであつた。 In the conventional examples shown in FIGS. 4 and 5, if the opposing area between the heating line 12 and the auxiliary conductive plate 14 is, for example, 3So, and the opposing area between the temperature detection electrode 13 and the auxiliary conductive plate 14 is So, then the local Thermosensitive resin film 1 sandwiched between these opposing parts during insulation
Under the premise that the temperatures of the thermosensitive resin films 11 are approximately equal, the impedance ratio of the thermosensitive resin film 11 sandwiched between the opposing parts is 1:3. At this time, heating line 1
2 and the temperature detection electrode 13 is 100V, the voltage between the heating line 12 and the auxiliary conductive plate 14 is 25V,
A potential difference of 75V is generated between the temperature detection electrode 13 and the auxiliary conductive plate 14. Therefore, due to local insulation, etc., the temperature at 75V of the alteration limit curve shown in Figure 7 is
When the temperature of the thermosensitive resin film 11 rises above T 75 , the above-mentioned deterioration due to polarization occurs, and the temperature detection ability during local insulation is reduced.
（発明の目的）
本発明は上記の点に鑑み提案されたもので、そ
の目的とするところは、感熱樹脂フイルムの両面
の電位差を小さくするとにより広い温度範囲にわ
たつて感熱樹脂フイルムの分極による変質を防止
し、局部断熱時においても常に正確な温度検出ひ
いては温度制御が行なえるようにした感熱面状発
熱体を提供することにある。(Object of the Invention) The present invention has been proposed in view of the above points, and its purpose is to reduce the potential difference between the two sides of the thermosensitive resin film to reduce the deterioration of the thermosensitive resin film due to polarization over a wider temperature range. It is an object of the present invention to provide a heat-sensitive sheet heating element which prevents this and enables accurate temperature detection and temperature control at all times even during local insulation.
（発明の開示）
以下、図に沿つて本発明を説明する。第１図お
よび第２図は本発明の一実施例を示すもので、図
において、１は従来と同様に負の温度−インピー
ダンス特性を有するナイロン樹脂等の感熱樹脂フ
イルムであり、その片面には、アルミニウム箔の
如き金属箔からなる発熱線路２および発熱線路と
しても使用可能な温度検出電極３が並設され、感
熱樹脂フイルム１の他面には、アルミニウム箔の
如き金属箔からなる比較的小面積の補助導電板４
が、感熱樹脂フイルム１１を介して発熱線路２お
よび温度検出電極３の双方に対面するように多
数、配設されている。なお、５，６はそれぞれ絶
縁フイルムを示す。(Disclosure of the Invention) The present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention. In the figures, numeral 1 is a thermosensitive resin film such as nylon resin having negative temperature-impedance characteristics as in the past; , a heat generating line 2 made of metal foil such as aluminum foil and a temperature detection electrode 3 which can also be used as a heat generating line are arranged side by side, and a relatively small heat generating line 2 made of metal foil such as aluminum foil is provided on the other side of the thermosensitive resin film 1. Area auxiliary conductive plate 4
are arranged in large numbers so as to face both the heat generating line 2 and the temperature detection electrode 3 via the thermosensitive resin film 11. Note that 5 and 6 each indicate an insulating film.
しかして本発明においては、第１図に示す如く
一の補助導電板４とこれに対面する発熱線路２と
の間の感熱樹脂フイルム１のインピーダンス｜
Z24｜と、同じく補助導電板４とこれに対面する
温度検出電極３との間のインピーダンス｜Z34｜
とが等しくなるように構成した点に特徴を有して
いる。その具体的手段としては、第２図に示すよ
うに線幅の広い発熱線路２の一部に補助導電板４
を対面させたり、また第３図に他の実施例として
示すように補助導電板４を特殊な形状として発熱
線路２および温度検出電極３の線幅方向の全幅に
わたつて補助導電板４を対面させるとともに、そ
の対向面積を実質上等しくすることにより、上記
第２図に示す線幅の広い発熱線路２の一部に補助
導電板４を対面させるものに比し、発熱線路２の
周辺部からの酸化による感熱樹脂フイルムの劣化
が少なくなる方法などが考えられる。 Therefore, in the present invention, as shown in FIG. 1, the impedance of the thermosensitive resin film 1 between one auxiliary conductive plate 4 and the heating line 2 facing it |
Z 24 | and the impedance between the auxiliary conductive plate 4 and the temperature detection electrode 3 facing it |Z 34 |
It is characterized in that it is constructed so that they are equal. As a specific means, as shown in FIG.
Alternatively, as shown in another embodiment in FIG. 3, the auxiliary conductive plate 4 is made in a special shape so that the auxiliary conductive plate 4 faces the entire width of the heating line 2 and the temperature detection electrode 3 in the line width direction. At the same time, by making the opposing areas substantially equal, the auxiliary conductive plate 4 faces a part of the heating line 2 with a wide line width as shown in FIG. Possible methods include reducing deterioration of the thermosensitive resin film due to oxidation.
こうすることにより、例えば発熱線路２と温度
検出電極３との間の電位差が100Vあつたとする
と、発熱線路２と補助導電板４との間の電位差は
50V、温度検出電極３と補助導電板４との間の電
位差も50Vとなり、この電圧における変質限界温
度は第７図からT50となる。すなわち、従来にお
けるT75よりも高い温度となるため、より高い温
度領域まで正常な温度検出動作が保証されること
となる。 By doing this, for example, if the potential difference between the heat generating line 2 and the temperature detection electrode 3 is 100V, the potential difference between the heat generating line 2 and the auxiliary conductive plate 4 is
50V, the potential difference between the temperature detection electrode 3 and the auxiliary conductive plate 4 is also 50V, and the deterioration limit temperature at this voltage is T50 from FIG. In other words, since the temperature is higher than that of the conventional T75 , normal temperature detection operation is guaranteed up to a higher temperature range.
なお、局部断熱等によつて発熱線路２と温度検
出電極３との間に温度差がある場合には対向部分
の感熱樹脂フイルム１のインピーダンスを等価に
するために、発熱線路２および温度検出電極と補
助導電板４との各対向面積を変える必要がある。 Note that if there is a temperature difference between the heat generating line 2 and the temperature detecting electrode 3 due to local insulation, etc., the heat generating line 2 and the temperature detecting electrode It is necessary to change the opposing areas of the auxiliary conductive plate 4 and the auxiliary conductive plate 4.
（発明の効果）
以上のように本発明によれば、感熱樹脂フイル
ムと、この感熱樹脂フイルムの片面に配設した金
属箔からなる発熱線路と、前記感熱樹脂フイルム
の片面に発熱線路と分離して並設され、かつ前記
発熱線路との間の感熱樹脂フイルムのインピーダ
ンス変化を検出すると共に発熱線路としても使用
可能な温度検出電極と、前記感熱樹脂フイルムの
他面に分散配設され、かつこの感熱樹脂フイルム
を介して前記発熱線路およびこの発熱線路に並設
された温度検出電極に対面する金属箔からなる複
数の補助導電板とを備えた感熱面状発熱体におい
て、個々の補助導電板とこの補助導電板に対面す
る発熱線路との間の感熱樹脂フイルムのインピー
ダンスを、前記補助導電板とこの補助導電板に対
面する温度検出電極との間の感熱樹脂フイルムの
インピーダンスに等しくしたから、感熱樹脂フイ
ルムの分極による変質が生じる臨界温度を上昇さ
せ、広い温度範囲にわたつて正常な温度検出が可
能であるため、局部断熱時等、部分的に高温とな
る事態が生じても温度検出能力が劣ることもな
く、適正な温度制御によつて常に安全性を確保で
きるという効果を有する。(Effects of the Invention) As described above, according to the present invention, there is a heat-sensitive resin film, a heat-generating line made of metal foil disposed on one side of the heat-sensitive resin film, and a heat-generating line separated from the heat-generating line on one side of the heat-sensitive resin film. Temperature detection electrodes arranged in parallel on the heat-sensitive resin film and capable of detecting impedance changes in the heat-sensitive resin film between them and the heat-generating line, and which can also be used as heat-generating lines; In a heat-sensitive sheet heating element comprising a plurality of auxiliary conductive plates made of metal foil facing the heat-generating line and a temperature detection electrode arranged in parallel with the heat-generating line through a heat-sensitive resin film, each auxiliary conductive plate and Since the impedance of the thermosensitive resin film between the heating line facing the auxiliary conductive plate is equal to the impedance of the thermosensitive resin film between the auxiliary conductive plate and the temperature detection electrode facing the auxiliary conductive plate, By raising the critical temperature at which deterioration occurs due to polarization of the resin film, normal temperature detection is possible over a wide temperature range, so the temperature detection ability is maintained even in situations where high temperatures occur locally, such as during local insulation. It has the effect of ensuring safety at all times through proper temperature control.
第１図は本発明の一実施例を示す断面図、第２
図は同じく平面図、第３図は本発明の他の実施例
を示す平面図、第４図ないし第７図は従来例を示
すもので、第４図は断面図、第５図は平面図、第
６図および第７図は特性図である。
１……感熱樹脂フイルム、２……発熱線路、３
……温度検出電極、４……補助導電板。
FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
3 is a plan view showing another embodiment of the present invention, FIGS. 4 to 7 show a conventional example, FIG. 4 is a sectional view, and FIG. 5 is a plan view. , FIG. 6 and FIG. 7 are characteristic diagrams. 1...Thermosensitive resin film, 2...Heating line, 3
...Temperature detection electrode, 4...Auxiliary conductive plate.
Claims (1)
の片面に配設した金属箔からなる発熱線路と、前
記感熱樹脂フイルムの片面に発熱線路と分離して
並設され、かつ前記発熱線路との間の感熱樹脂フ
イルムのインピーダンス変化を検出すると共に発
熱線路としても使用可能な温度検出電極と、前記
感熱樹脂フイルムの他面に分散配設され、かつこ
の感熱樹脂フイルムを介して前記発熱線路および
この発熱線路に並設された温度検出電極に対面す
る金属箔からなる複数の補助導電板とを備えた感
熱面状発熱体において、個個の補助導電板とこの
補助導電板に対面する発熱線路との間の感熱樹脂
フイルムのインピーダンスを、前記補助導電板と
この補助導電板に対面する温度検出電極との間の
感熱樹脂フイルムのインピーダンスに等しくした
ことを特徴とする感熱面状発熱体。1. A heat-sensitive resin film, a heat-generating line made of metal foil arranged on one side of the heat-sensitive resin film, and a heat-sensitive line arranged in parallel with and separated from the heat-generating line on one side of the heat-sensitive resin film, and between the heat-sensitive line and the heat-generating line. Temperature detection electrodes that detect impedance changes in the resin film and can also be used as heating lines; In a heat-sensitive sheet heating element equipped with a plurality of auxiliary conductive plates made of metal foil facing parallel temperature detection electrodes, the distance between each auxiliary conductive plate and the heating line facing the auxiliary conductive plates A heat-sensitive sheet heating element characterized in that the impedance of the heat-sensitive resin film is equal to the impedance of the heat-sensitive resin film between the auxiliary conductive plate and a temperature detection electrode facing the auxiliary conductive plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15829685A JPS6220277A (en) | 1985-07-19 | 1985-07-19 | Thermal surface heat generating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15829685A JPS6220277A (en) | 1985-07-19 | 1985-07-19 | Thermal surface heat generating body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6220277A JPS6220277A (en) | 1987-01-28 |
| JPH0340473B2 true JPH0340473B2 (en) | 1991-06-19 |
Family
ID=15668508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15829685A Granted JPS6220277A (en) | 1985-07-19 | 1985-07-19 | Thermal surface heat generating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6220277A (en) |
-
1985
- 1985-07-19 JP JP15829685A patent/JPS6220277A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6220277A (en) | 1987-01-28 |
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