JPH10241906A - Positive temperature coefficient thermistor heat generating body - Google Patents
Positive temperature coefficient thermistor heat generating bodyInfo
- Publication number
- JPH10241906A JPH10241906A JP4320697A JP4320697A JPH10241906A JP H10241906 A JPH10241906 A JP H10241906A JP 4320697 A JP4320697 A JP 4320697A JP 4320697 A JP4320697 A JP 4320697A JP H10241906 A JPH10241906 A JP H10241906A
- Authority
- JP
- Japan
- Prior art keywords
- thermistors
- temperature coefficient
- positive temperature
- heat generating
- generating body
- 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
Landscapes
- Resistance Heating (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、正特性サーミスタ
からの熱を金属放熱体を用いて温風として取り出し、温
風ヒータとして使用する正特性サーミスタ発熱体に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positive temperature coefficient thermistor heating element for extracting heat from a positive temperature coefficient thermistor as hot air using a metal radiator and using it as a hot air heater.
【０００２】[0002]
【従来の技術】正特性サーミスタは、ある温度（キュリ
ー温度）以上で急激にその抵抗値が上昇する性質を持っ
た半導体セラミックであり、従って正特性サーミスタの
両電極に電圧を印加すると自己発熱し、正特性サーミス
タの自己制御作用により一定の温度を保つ。従って、赤
熱等の過熱が起こらない安全性の高い発熱体として広く
応用されている。また従来から、発熱量（電力）を大き
くするために正特性サーミスタを直線状に複数個配置
し、電気的には複数個を並列接続した構造としている。2. Description of the Related Art A positive temperature coefficient thermistor is a semiconductor ceramic having a property that its resistance value rapidly rises above a certain temperature (Curie temperature). Therefore, when a voltage is applied to both electrodes of the positive temperature coefficient thermistor, self-heating occurs. The constant temperature is maintained by the self-control action of the positive temperature coefficient thermistor. Therefore, it is widely applied as a highly safe heating element that does not cause overheating such as red heat. Conventionally, a plurality of PTC thermistors are arranged linearly in order to increase the amount of heat (power), and a plurality of PTC thermistors are electrically connected in parallel.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の構成において電力を増大させるために複数の正特性
サーミスタを電気的に並列接続すると初期の抵抗値が小
さくなり、電圧印加時の最大電流値が大きくなるため機
器に使用するヒューズ容量を大きくする必要があり、ま
た家庭で使用中にブレーカが遮断する等の課題から最大
電流の低減化の要求があった。However, when a plurality of positive temperature coefficient thermistors are electrically connected in parallel to increase the power in the above-mentioned conventional configuration, the initial resistance value becomes small, and the maximum current value when a voltage is applied becomes small. As the size of the fuse increases, it is necessary to increase the fuse capacity used in the equipment, and there has been a demand for a reduction in the maximum current due to problems such as the breaker breaking during use at home.
【０００４】本発明は、最大電流を低減した正特性サー
ミスタ発熱体を提供することを目的とするものである。An object of the present invention is to provide a PTC thermistor having a reduced maximum current.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明はキュリー温度の異なる正特性サーミスタを
複数個組み合せるものである。In order to achieve the above object, the present invention combines a plurality of PTC thermistors having different Curie temperatures.
【０００６】[0006]
【発明の実施の形態】本発明の請求項１の発明は、正特
性サーミスタのキュリー温度の差を設けているので、電
圧を印加した時、電流値が最大になる時間に差が生じ
る。すなわち、キュリー温度の低い正特性サーミスタは
最大電流値になる時間が短く、キュリー温度の高い正特
性サーミスタは最大電流値になる時間が長くなる。従っ
て、これらの正特性サーミスタを金属放熱体に組み合せ
て定電圧をを印加した場合、それぞれの正特性サーミス
タの最大電流値に達する時間が異なるため、同じキュリ
ー温度の正特性サーミスタを使用した場合と比較して最
大電流値を低下させることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first aspect of the present invention, since a difference in the Curie temperatures of the positive temperature coefficient thermistors is provided, there is a difference in the time when the current value becomes maximum when a voltage is applied. That is, a positive temperature coefficient thermistor having a low Curie temperature has a short time to reach a maximum current value, and a positive temperature coefficient thermistor having a high Curie temperature has a long time to reach a maximum current value. Therefore, when these positive temperature coefficient thermistors are combined with a metal radiator and a constant voltage is applied, the time to reach the maximum current value of each positive temperature coefficient thermistor is different, so that the case where a positive temperature coefficient thermistor with the same Curie temperature is used is used. The maximum current value can be reduced by comparison.
【０００７】以下、本発明の実施形態について説明す
る。 （実施形態１）金属放熱体２は、２．２ｍｍピッチで波
形に折り曲げた通風口を有する薄いアルミニウムよりな
り、この金属放熱体２の両面にアルミニウムの端子３，
４をブレージング工法により溶着している。この金属放
熱体２に、直線状に配置した正特性サーミスタ１ａ〜１
ｃを樹脂で加圧接着し、加熱して硬化固着した。なおこ
の正特性サーミスタの１ａはキュリー温度が１７０℃抵
抗値１５３Ω、１ｂのキュリー温度は２２０℃抵抗値１
４９Ω、１ｃのキュリー温度は２７０℃抵抗値１５５Ω
である。これらの正特性サーミスタ１ａ〜１ｃのそれぞ
れについて電圧１００Ｖを印加した時の電流−時間特性
を図３に示す。この図よりキュリー温度の差によって、
最大電流値に到達する時間がそれぞれ異なり、キュリー
温度の低いものは時間が短く、キュリー温度の高いもの
ほど時間が長い。これらの正特性サーミスタを図１の如
く直線状に組み合せ、この両端子間に１００Ｖ印加した
時の電流−時間特性は図３の破線で示した曲線となり、
この時の最大電流値は４．６Ａであった。一方、従来例
による正特性サーミスタのキュリー温度２２０℃の正特
性サーミスタのみ３枚用いて同様の方法で１００Ｖの電
圧を印加した時の最大電流値は図４の如く６．６Ａであ
った。Hereinafter, an embodiment of the present invention will be described. (Embodiment 1) The metal radiator 2 is made of thin aluminum having ventilation holes bent in a waveform at a pitch of 2.2 mm.
4 is welded by a brazing method. Positive thermistors 1 a to 1 arranged linearly on this metal heat radiator 2.
c was pressure-bonded with a resin, and then cured and fixed by heating. The positive characteristic thermistor 1a has a Curie temperature of 170 ° C and a resistance value of 153Ω, and the Curie temperature of 1b has a Curie temperature of 220 ° C and a resistance value of 1
Curie temperature of 49Ω, 1c is 270 ° C, resistance value is 155Ω
It is. FIG. 3 shows current-time characteristics when a voltage of 100 V is applied to each of the positive characteristic thermistors 1a to 1c. From this figure, depending on the difference in Curie temperature,
The time to reach the maximum current value differs from one another, and the lower the Curie temperature, the shorter the time, and the higher the Curie temperature, the longer the time. These positive temperature coefficient thermistors are combined linearly as shown in FIG. 1, and the current-time characteristic when 100 V is applied between these terminals is a curve shown by a broken line in FIG.
The maximum current value at this time was 4.6A. On the other hand, the maximum current value when a voltage of 100 V was applied in the same manner using only three positive temperature coefficient thermistors having a Curie temperature of 220 ° C. in the conventional positive temperature coefficient thermistor was 6.6 A as shown in FIG.
【０００８】（実施形態２）図２は実施形態１により作
成した発熱体を２段に積み重ね接着したものである。実
施形態１と同様な方法で電圧を１００Ｖ印加した時、上
部端子４と中央の端子４間では最大電流で４．６Ａ、上
下の端子４，４間での最大電流値は９．２Ａであった。
一方、従来例による方法での最大電流値は、それぞれ
６．６Ａと１３．２Ａであった。これらの結果を（表
１）に記載した。(Embodiment 2) FIG. 2 shows a structure in which the heating elements prepared according to Embodiment 1 are stacked and bonded in two stages. When a voltage of 100 V was applied in the same manner as in the first embodiment, the maximum current between the upper terminal 4 and the center terminal 4 was 4.6 A, and the maximum current between the upper and lower terminals 4 and 4 was 9.2 A. Was.
On the other hand, the maximum current values in the method according to the conventional example were 6.6 A and 13.2 A, respectively. These results are shown in (Table 1).
【０００９】[0009]
【表１】 [Table 1]
【００１０】尚、上記実施形態１，２においては、正特
性サーミスタのキュリー温度をそれぞれ１７０℃，２２
０℃，２７０℃に設定し、素子枚数の３枚で実施した
が、これらはいずれも目的に応じて変えることができ、
それによって最大電流値、消費電力を調整することが出
来る。この結果より、従来例の最大電流値を低下させる
ことができ、実用上効果がある。In the first and second embodiments, the Curie temperatures of the positive temperature coefficient thermistors are 170 ° C. and 22 ° C., respectively.
The temperature was set at 0 ° C. and 270 ° C., and the measurement was performed with three elements, but any of these could be changed according to the purpose.
Thereby, the maximum current value and the power consumption can be adjusted. As a result, the maximum current value of the conventional example can be reduced, which is practically effective.
【００１１】[0011]
【発明の効果】以上のように本発明は、最大電流が低減
されるので、より安価な材料、圧着等の簡単な端子接続
法が可能となり、産業上大きな効果をもたらす正特性サ
ーミスタ発熱体を提供することができる。As described above, according to the present invention, since the maximum current is reduced, a less expensive material, a simple terminal connection method such as crimping can be performed, and a positive-characteristic thermistor heating element having a great industrial effect can be provided. Can be provided.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施形態１による正特性サーミスタ発
熱体の斜視図FIG. 1 is a perspective view of a PTC thermistor heating element according to Embodiment 1 of the present invention.
【図２】本発明の実施形態２による正特性サーミスタ発
熱体の斜視図FIG. 2 is a perspective view of a PTC thermistor heating element according to Embodiment 2 of the present invention.
【図３】本発明の実施形態１における正特性サーミスタ
の電流−時間特性図FIG. 3 is a current-time characteristic diagram of a positive temperature coefficient thermistor according to Embodiment 1 of the present invention.
【図４】従来例による正特性サーミスタの電流−時間特
性図FIG. 4 is a current-time characteristic diagram of a positive temperature coefficient thermistor according to a conventional example.
１ａ〜１ｃ 正特性サーミスタ ２ 金属放熱体 ３，４ 端子 1a-1c Positive Characteristic Thermistor 2 Metal Heat Dissipator 3, 4 Terminal
Claims (1)
スタの直線状配置体の両側に、薄い金属板を波状に折り
曲げてなる金属放熱体を固着した正特性サーミスタ発熱
体において、上記直線状配置体は、キュリー温度の異な
る正特性サーミスタを組み合せて構成された正特性サー
ミスタ発熱体。1. A positive-characteristic thermistor heating element in which a metal heat radiator formed by bending a thin metal plate in a wave shape is fixed to both sides of a linear arrangement of a plurality of positive-characteristic thermistors provided with electrodes on both sides. The arrangement body is a PTC thermistor heating element configured by combining PTC thermistors with different Curie temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4320697A JPH10241906A (en) | 1997-02-27 | 1997-02-27 | Positive temperature coefficient thermistor heat generating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4320697A JPH10241906A (en) | 1997-02-27 | 1997-02-27 | Positive temperature coefficient thermistor heat generating body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10241906A true JPH10241906A (en) | 1998-09-11 |
Family
ID=12657457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4320697A Pending JPH10241906A (en) | 1997-02-27 | 1997-02-27 | Positive temperature coefficient thermistor heat generating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10241906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009099992A (en) * | 2007-10-16 | 2009-05-07 | Liebherr-Aerospace Lindenberg Gmbh | Apparatus having at least one ptc resistor |
-
1997
- 1997-02-27 JP JP4320697A patent/JPH10241906A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009099992A (en) * | 2007-10-16 | 2009-05-07 | Liebherr-Aerospace Lindenberg Gmbh | Apparatus having at least one ptc resistor |
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