JPS6164092A - Waterproof positive temperature coefficient thermistor unit - Google Patents
Waterproof positive temperature coefficient thermistor unitInfo
- Publication number
- JPS6164092A JPS6164092A JP18402884A JP18402884A JPS6164092A JP S6164092 A JPS6164092 A JP S6164092A JP 18402884 A JP18402884 A JP 18402884A JP 18402884 A JP18402884 A JP 18402884A JP S6164092 A JPS6164092 A JP S6164092A
- Authority
- JP
- Japan
- Prior art keywords
- temperature coefficient
- positive temperature
- coefficient thermistor
- space
- lead wire
- 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.)
- Granted
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は正特性サーｉスタを利用した発熱体や限流素子
といった正特性サーミスタ装置に関するもので、屋外や
水中で用いても問題のないようにしたものである。[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a positive temperature coefficient thermistor device such as a heating element or a current limiting element using a positive temperature coefficient thermistor, and is designed to be used outdoors or underwater without any problem. This is what I did.
従来例の構成とその問題点
一般に正特性サーミスタはチタン酸バリウムを主成分と
した半導体セラミックを特性要素とするもので、ある温
度（抵抗急変温度）以上になると抵抗値が急に増大する
性質を持ったものである。Configuration of conventional examples and their problems In general, positive temperature coefficient thermistors are characterized by a semiconductor ceramic whose main component is barium titanate, and the resistance value increases suddenly when the temperature exceeds a certain temperature (sudden resistance change temperature). It is something I have.
そのため、この性質を利用して定温発熱体や限流素子に
利用されることはよく知られている。しかしながら、こ
の正ｌｌ″ｌ゛性サーミスタを利用するにあたって、防
水型構造とするため正特性サーミスタを樹脂などで封じ
こんで密閉したものを、電圧を印加して正特性サーミス
タを発熱させ長時間使用した場合、時々焼損がおこるこ
とがある。これは高温で密閉状態で使用したとき、素子
の周辺部材が酸化されて素子の周囲の酸素分圧が低くな
り、チタン酸バリウム中の酸素が奪われて、素子の特性
が劣化し局部的に発熱するものと考えられるこのような
現象は特に抵抗急変温度が１５０°Ｃ以上の場合、顕著
にあられれる。Therefore, it is well known that this property is utilized for constant temperature heating elements and current limiting elements. However, when using this positive temperature coefficient thermistor, in order to have a waterproof structure, the positive temperature coefficient thermistor is sealed with resin etc., and a voltage is applied to the positive temperature coefficient thermistor to generate heat and use it for a long time. When used in a sealed state at high temperatures, the surrounding parts of the element are oxidized, lowering the oxygen partial pressure around the element and depriving the barium titanate of oxygen. This phenomenon, which is considered to be due to deterioration of the characteristics of the element and local heat generation, occurs particularly when the resistance sudden change temperature is 150° C. or higher.
そのため、これを防ぐため従来例では、正特性サーミス
タの周囲に空間を設けていた（特公昭５８−４２９５６
号公報）。この様子を図で説明する。第１図は従来例の
断面図である。正特性す−ミスタ１の両面に焼付銀など
による電極２が設けられている。リード線４は、その電
極に半田などによって固着され、一端が封止された金属
ケース６の中に上記正特性サーミスタ１がシリコン樹脂
５によって封入されている。また正特性サーミスタ１の
近傍には外気と通じる空間７が設けられている。この空
間のため、外気の酸素が素子近傍まで十分に循環し、高
温になっても酸素分圧が低下することなく、信頼性の高
い正特性サーミスタ装置が得られたｏしかしながら、こ
の従来例では、素子の周囲の空間が外気と通じているた
め、屋外で使用したり、水中で使用したりすると、水が
素子に触れ、絶縁抵抗の劣化をおこしてショートし結局
、焼損に至ることがある。このように従来例では、水中
や屋外では使用できないものであった。Therefore, in order to prevent this, in the conventional example, a space was provided around the positive temperature coefficient thermistor (Japanese Patent Publication No. 58-42956
Publication No.). This situation will be explained with a diagram. FIG. 1 is a sectional view of a conventional example. Electrodes 2 made of baked silver or the like are provided on both sides of the positive characteristic mister 1. The positive temperature coefficient thermistor 1 is sealed with silicone resin 5 in a metal case 6 whose electrodes are fixed to the lead wires 4 by solder or the like, and one end of which is sealed. Further, a space 7 communicating with the outside air is provided near the positive temperature coefficient thermistor 1. Because of this space, oxygen from the outside air is sufficiently circulated to the vicinity of the element, and the oxygen partial pressure does not decrease even at high temperatures, making it possible to obtain a highly reliable positive temperature coefficient thermistor device.However, in this conventional example, Since the space around the element communicates with the outside air, if it is used outdoors or underwater, water may come into contact with the element, causing deterioration of insulation resistance and short-circuiting, which may eventually lead to burnout. . As described above, the conventional example cannot be used underwater or outdoors.
発明の目的
本発明はこのような欠点を改良するためになされたもの
であり、水中や屋外で使用しても、ショートや焼損のな
い信頼性の高い防水形の正特性サーミスタ装置を提供す
ることにある。OBJECT OF THE INVENTION The present invention has been made to improve these drawbacks, and it is an object of the present invention to provide a highly reliable waterproof positive temperature coefficient thermistor device that does not cause short circuits or burnout even when used underwater or outdoors. It is in.
発明の１１゛り成
上記目的を達成するために本発明は両面に電極が設けら
れた正特性サーミスタと、その電極に固着されたリード
線とリード線を被覆している絶縁チューブとから構成さ
れ、正特性サーミスタは樹脂の中に埋め込まれ、リード
線はその樹脂の外へ出ており、さらに、正特性サーミス
タと樹脂との間に空間が設けら扛ておりその空間と外気
とを絶縁チューブとリード線との間に設けられた空間に
よってつながっている構成である。11. Composition of the Invention In order to achieve the above object, the present invention comprises a positive temperature coefficient thermistor having electrodes on both sides, a lead wire fixed to the electrode, and an insulating tube covering the lead wire. , the positive temperature coefficient thermistor is embedded in resin, and the lead wires come out of the resin.Furthermore, there is a space between the positive temperature coefficient thermistor and the resin, and an insulating tube is used to separate that space from the outside air. The lead wire is connected by a space provided between the lead wire and the lead wire.
実施例の説明
本発明の一実施例について説明する。第２図において、
両面に焼付銀などの電極９が設けられた正特性サーミス
タ８のその電極面に、軟鋼線などのリード線１１が半田
１０によって接着しである。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described. In Figure 2,
A lead wire 11 such as a mild steel wire is bonded by solder 10 to the electrode surface of a positive temperature coefficient thermistor 8 which has electrodes 9 made of baked silver or the like on both sides.
リード線１１には、塩化ビニルやシリコンゴムなどの絶
縁チューブ１２がかぶせである。上記正特性サーミスタ
８を、エポキシ樹脂やシリコン樹脂などの団脂１３によ
っそ全体を覆っである。また、正特性サーミスタ８と、
樹脂１３との間には空間ａが設けてあり、さらにその空
間ａは、リード線１１と絶縁チューブ１２との間の空間
すを通じて外気Ｃと通じている。The lead wire 11 is covered with an insulating tube 12 made of vinyl chloride, silicone rubber, or the like. The positive temperature coefficient thermistor 8 is almost entirely covered with resin 13 made of epoxy resin, silicone resin, or the like. Further, a positive characteristic thermistor 8,
A space a is provided between the lead wire 11 and the insulating tube 12, and the space a communicates with outside air C through a space between the lead wire 11 and the insulating tube 12.
この正特性サーミスタ装置は、水中に浸漬されて、水中
ヒータとして用いられたり、屋外の水道管凍結防止用ヒ
ータとして用いることができる。This positive temperature coefficient thermistor device can be immersed in water and used as an underwater heater, or can be used as an outdoor water pipe freeze prevention heater.
その時、リード線１１の絶縁チューブ１２の開口は、一
般に防水処理が施されているか、あるいは水の浸入のな
いところに設置さｎている。このように正特性サーミス
タ８は樹脂１３で俊われているので、完全に防水状態に
おかれており、またその周囲には十分に外気が導入され
、正特性サーミスタ８の劣化をおこすことがない。その
ため、水中ヤ屋外で安心して使用できる信頼性の高い正
特性サーミスタ装置である。At this time, the opening of the insulating tube 12 of the lead wire 11 is generally waterproofed or installed in a place where no water can enter. Since the positive temperature coefficient thermistor 8 is covered with the resin 13 in this way, it is completely waterproof, and sufficient outside air is introduced around it, so that the positive temperature coefficient thermistor 8 does not deteriorate. . Therefore, it is a highly reliable positive temperature coefficient thermistor device that can be used with confidence both underwater and outdoors.
なお、本実施例では、正特性サーミスタ８全樹脂１３の
みで覆った例を示したが、その他に金属ケースを用いて
、その中で樹脂でポツティングしてもよい。Although this embodiment shows an example in which the PTC thermistor 8 is entirely covered with only the resin 13, it is also possible to use a metal case and pot the resin inside the case.
発明の効果
以上の説明から明らかなように、本発明によれば、正特
性サーミスタを密閉して防水構造にし、正特性サーミス
タの周囲に空間を設け、その空間が水滴のあたらない外
気まで通じているため、正特性サーミスタの焼損のおそ
れのない、安全で信頼ｕｋの高い防水旧！１斤性サーミ
スタ装置を提供することができる。Effects of the Invention As is clear from the above explanation, according to the present invention, a positive temperature coefficient thermistor is sealed to have a waterproof structure, a space is provided around the positive temperature coefficient thermistor, and the space is connected to the outside air where water droplets do not hit. Because of this, there is no risk of burning out the PTC thermistor, making it a safe and reliable waterproof product! A one-loaf thermistor device can be provided.
置の一実施例の断面図である。
８・・・・正特性サーミスタ、９・・・・電極、１ｏ・
・・・・半田、１１・・・・リード線、１２・・・・・
・絶縁チューブ、１３・・・・樹脂、ａ、ｂ・・・・・
・空間、Ｃ・・・・・外気。FIG. 8...Positive characteristic thermistor, 9...Electrode, 1o...
...Solder, 11...Lead wire, 12...
・Insulating tube, 13...resin, a, b...
・Space, C...Outside air.
Claims (1)
に固着されたリード線と、そのリード線を保護する耐水
性絶縁チューブとを有し、前記正特性サーミスタは樹脂
の中に埋めこまれ、かつその近傍に空間が設けられ、そ
の空間と外気とを絶縁チューブとリード線との間に設け
られた空間によってつながれている防水形正特性サーミ
スタ装置。A positive temperature coefficient thermistor having electrodes on both sides, a lead wire fixed to the electrode, and a water-resistant insulating tube that protects the lead wire, the positive temperature coefficient thermistor being embedded in a resin, A waterproof positive temperature coefficient thermistor device in which a space is provided near the space, and the space is connected to the outside air by a space provided between an insulating tube and a lead wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18402884A JPH0665114B2 (en) | 1984-09-03 | 1984-09-03 | Waterproof positive temperature coefficient thermistor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18402884A JPH0665114B2 (en) | 1984-09-03 | 1984-09-03 | Waterproof positive temperature coefficient thermistor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6164092A true JPS6164092A (en) | 1986-04-02 |
| JPH0665114B2 JPH0665114B2 (en) | 1994-08-22 |
Family
ID=16146085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18402884A Expired - Lifetime JPH0665114B2 (en) | 1984-09-03 | 1984-09-03 | Waterproof positive temperature coefficient thermistor device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0665114B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000138101A (en) * | 1998-10-29 | 2000-05-16 | Murata Mfg Co Ltd | Electronic parts |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015215955A (en) * | 2014-05-08 | 2015-12-03 | 株式会社リミックス | heater |
-
1984
- 1984-09-03 JP JP18402884A patent/JPH0665114B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000138101A (en) * | 1998-10-29 | 2000-05-16 | Murata Mfg Co Ltd | Electronic parts |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0665114B2 (en) | 1994-08-22 |
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