JPH09204978A - Thermistor heating element with positive temperature coefficient - Google Patents
Thermistor heating element with positive temperature coefficientInfo
- Publication number
- JPH09204978A JPH09204978A JP1144596A JP1144596A JPH09204978A JP H09204978 A JPH09204978 A JP H09204978A JP 1144596 A JP1144596 A JP 1144596A JP 1144596 A JP1144596 A JP 1144596A JP H09204978 A JPH09204978 A JP H09204978A
- Authority
- JP
- Japan
- Prior art keywords
- elements
- thermistor
- insulating frame
- heating element
- temperature coefficient
- 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
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、温風ヒータなどの
流体加熱する目的で用いられ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 PTC thermistor heating element used for heating a fluid such as a warm air heater.
【０００２】[0002]
【従来の技術】従来の正特性サーミスタ発熱体（以降サ
ーミスタ発熱体と称する）の斜視図を図４に示す。図４
において、１ａ〜１ｆは両主平面に電極が設けられた正
特性サーミスタ素子（以降サーミスタ素子と称する）、
２ａ，２ｂはアルミニウムをろう付けして構成されたコ
ルゲート状の金属放熱体、３ａ，３ｂは前記金属放熱体
２ａ，２ｂに固着されているステンレス製の端子板であ
る。前記金属放熱体２ａ，２ｂは前記サーミスタ素子１
ａ〜１ｆの両面の電極面に接着剤（図示せず）で熱的、
電気的にかつ機械的に固着されている。以上のように構
成された、サーミスタ発熱体の端子板３ａ，３ｂに電圧
を印加するとサーミスタ素子１ａ〜１ｆは発熱し、金属
放熱体２ａ，２ｂに空気を通過させると温風が得られ
る。また、周知のようにサーミスタ素子１ａ〜１ｆはチ
タン酸バリウムを主成分にした半導体セラミックであ
り、ある温度までは抵抗値が低く、それ以上の温度にな
ると急激に抵抗値が上昇する性質をもっている。したが
って、電圧を印加し発熱体として用いた場合は自己温度
制御作用がある発熱体として良く利用されている。2. Description of the Related Art FIG. 4 shows a perspective view of a conventional positive temperature coefficient thermistor heating element (hereinafter referred to as "thermistor heating element"). FIG.
1, 1a to 1f are positive temperature coefficient thermistor elements (hereinafter referred to as thermistor elements) in which electrodes are provided on both main planes,
Corrugated metal heat radiators 2a and 2b are formed by brazing aluminum, and 3a and 3b are stainless steel terminal plates fixed to the metal heat radiators 2a and 2b. The metal radiators 2a and 2b are the thermistor element 1
Thermally using an adhesive (not shown) on the electrode surfaces on both sides of a to 1f,
It is fixed electrically and mechanically. When the voltage is applied to the terminal plates 3a and 3b of the thermistor heating element configured as described above, the thermistor elements 1a to 1f generate heat, and when air is passed through the metal radiators 2a and 2b, warm air is obtained. Further, as is well known, the thermistor elements 1a to 1f are semiconductor ceramics containing barium titanate as a main component, and have a property that the resistance value is low up to a certain temperature, and the resistance value rapidly increases at a temperature higher than that. . Therefore, when applied with a voltage and used as a heating element, it is often used as a heating element having a self-temperature control action.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、従来のサーミスタ発熱体を浴室乾燥機や
食器乾燥機などに用いた場合は、通過させる空気の中に
は、洗浄剤、入浴剤、油、塩、醤油などが含まれてお
り、それらの物質が直接サーミスタ素子１ａ〜１ｆに触
れるため、サーミスタ素子１ａ〜１ｆが劣化する恐れが
あった。また、それを防ぐためにサーミスタ素子１ａ〜
１ｆをシリコン樹脂などで埋め込む方法もあるが、その
場合はサーミスタ素子１ａ〜１ｆが密封状態となり空気
がなく、還元雰囲気となり、前記同様にサーミスタ素子
１ａ〜１ｆが劣化する恐れがあった。However, in the above-mentioned conventional configuration, when the conventional thermistor heating element is used in a bathroom dryer, a tableware dryer, etc., a cleaning agent and a bath agent are contained in the air passing through. , Oil, salt, soy sauce, etc. are contained, and these substances directly contact the thermistor elements 1a to 1f, so that the thermistor elements 1a to 1f may be deteriorated. In order to prevent this, the thermistor element 1a-
There is also a method of embedding 1f with silicon resin or the like, but in that case, the thermistor elements 1a to 1f are in a hermetically sealed state, there is no air, and there is a reducing atmosphere, and there is a possibility that the thermistor elements 1a to 1f are deteriorated as described above.
【０００４】本発明は前記の課題を解決するもので、信
頼性の高い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。The present invention has been made to solve the above problems, and an object thereof is to provide a highly reliable thermistor heating element.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
に、本発明は複数のサーミスタ素子を、絶縁枠体内部に
収納するとともに、この絶縁枠体内部には正特性サーミ
スタ同士を分離する凸部を設け、この凸部には絶縁枠体
内部に向かって開口した開孔部を形成したものである。In order to achieve this object, the present invention accommodates a plurality of thermistor elements inside an insulating frame, and the inside of the insulating frame has a convex portion that separates the positive temperature coefficient thermistors from each other. A portion is provided, and an opening portion that opens toward the inside of the insulating frame is formed in this convex portion.
【０００６】以上の構成とすれば開孔部から絶縁枠体内
に、サーミスタ素子の性能を劣化させる物質が流入して
も、サーミスタ素子にそれが直接触れることがないので
劣化がおきずしかもサーミスタ素子は開孔部から流入す
る空気により絶縁枠体内部で密閉状態になることはな
く、その点でも劣化させることはない。With the above structure, even if a substance that deteriorates the performance of the thermistor element flows into the insulating frame from the opening, it does not directly contact the thermistor element, and therefore the thermistor element does not deteriorate and the thermistor element does not deteriorate. Does not become sealed inside the insulating frame body due to the air flowing in from the opening portion, and in that respect also there is no deterioration.
【０００７】[0007]
【発明の実施の形態】本発明の請求項１に記載のサーミ
スタ発熱体は、複数のサーミスタ素子と、それを収納す
る絶縁枠体と、前記サーミスタ素子両主平面の電極と電
気的、かつ熱的に接続された金属放熱体とからなり、前
記絶縁枠体はその内部にサーミスタ素子同士を分離する
ように凸部を設け、この凸部には枠体内部に向かって開
孔部を形成したものである。この構成によりサーミスタ
素子の性能を劣化させる物質との接触を防ぐとともに、
サーミスタ素子の密封状態を解消することができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A thermistor heating element according to claim 1 of the present invention comprises a plurality of thermistor elements, an insulating frame for accommodating the thermistor elements, electrodes on both main planes of the thermistor elements, and electrical and thermal The heat insulating member is provided with a convex portion so as to separate the thermistor elements from each other, and an opening portion is formed in the convex portion toward the inside of the frame. It is a thing. This structure prevents contact with substances that deteriorate the performance of the thermistor element,
The sealed state of the thermistor element can be eliminated.
【０００８】本発明の請求項２に記載の発明は、絶縁枠
体に内部に設けた凸部が、枠体内部に行くにしたがって
小さくなるようにしたものであり、サーミスタ素子が前
記絶縁枠体内部側面に直接接触しないよう空気層を形成
させることで密閉状態を解消するものである。According to a second aspect of the present invention, the convex portion provided inside the insulating frame becomes smaller toward the inside of the frame, and the thermistor element is the insulating frame. By forming an air layer so as not to directly contact the inner side surface, the sealed state is eliminated.
【０００９】本発明の請求項３に記載の発明は、絶縁枠
体に設けた開孔部の断面積の大きさを、絶縁枠体内部に
向かうにしたがって小さくなるようにしたもので、これ
によりサーミスタ素子の性能を劣化させる物質の侵入経
路を長くすることができる。According to the third aspect of the present invention, the size of the cross-sectional area of the opening provided in the insulating frame is made smaller toward the inside of the insulating frame. It is possible to lengthen the path of entry of a substance that deteriorates the performance of the thermistor element.
【００１０】以下、本発明の一実施形態について図１〜
図３を用い説明する。図１は、本発明の一実施形態の分
解斜視図、図２は同じくＡ−Ａ面での断面図、図３は絶
縁枠体の部分拡大平面図である。図１〜図３において、
１１ａ〜１１ｆはサーミスタ素子で両主平面にアルミニ
ウムの電極が付与されている。１２ａ，１２ｂは金属放
熱体でアルミニウムのコルゲートフィンである。１３は
絶縁枠体で、耐熱性シリコン系樹脂で形成されている。
１５ａ〜１５ｊは、絶縁枠体１３内部に設けた凸部で、
サーミスタ素子１１ａ〜１１ｆ同士の接触を防ぐように
し、尚かつサーミスタ素子１１ａ〜１１ｆ側面が絶縁枠
体１３内部側面に接触を防ぐよう、その立上り部から先
端に行くにしたがって小さくしている。１４ａ〜１４ｊ
は前記凸部１５ａ〜１５ｊに形成した開孔部であり、１
６ａ，１６ｂは端子板でステンレスからなり金属放熱体
１２ａ，１２ｂに固定されている。前記構成において、
サーミスタ素子１１ａ〜１１ｆを絶縁枠体１３内部に収
納一体化した状態で、その上・下面を金属放熱体１２
ａ，１２ｂで挟持し、接着剤（図示せず）で電気的に、
かつ熱的に接続できるように固着した構造になってい
る。このサーミスタ発熱体方向に、洗浄剤、入浴剤、
油、塩、醤油などが流入しても絶縁枠体１３で、サーミ
スタ素子１１ａ〜１１ｆが保護されているため、サーミ
スタ素子１１ａ〜１１ｆはその性能を劣化させる物質と
触れることがない。またサーミスタ素子１１ａ〜１１ｆ
同士を分離している凸部１５ａ〜１５ｊに形成した開孔
部１４ａ〜１４ｊを介して、サーミスタ素子１１ａ〜１
１ｆの周囲に空気が侵入するので、密閉状態による還元
雰囲気になることはなく、サーミスタ素子１１ａ〜１１
ｆの劣化はない。An embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the plane AA, and FIG. 3 is a partially enlarged plan view of an insulating frame. 1 to 3,
11a to 11f are thermistor elements, and aluminum electrodes are provided on both main planes. Reference numerals 12a and 12b are metal radiators and are aluminum corrugated fins. An insulating frame 13 is made of a heat-resistant silicone resin.
15a to 15j are convex portions provided inside the insulating frame body 13,
In order to prevent the thermistor elements 11a to 11f from coming into contact with each other and prevent the side surfaces of the thermistor elements 11a to 11f from coming into contact with the inner side surfaces of the insulating frame body 13, the thermistor elements 11a to 11f are made smaller from the rising portion toward the tip. 14a-14j
Is an opening formed in the convex portions 15a to 15j, and
6a and 16b are terminal plates made of stainless steel and fixed to the metal radiators 12a and 12b. In the above configuration,
With the thermistor elements 11a to 11f housed and integrated in the insulating frame 13, the upper and lower surfaces of the thermistor elements 11a to 11f are integrated into the metal radiator 12.
It is sandwiched between a and 12b, and electrically with an adhesive (not shown),
In addition, the structure is fixed so that it can be thermally connected. To the thermistor heating element direction, cleaning agent, bath agent,
Since the thermistor elements 11a to 11f are protected by the insulating frame 13 even when oil, salt, soy sauce, etc., flow in, the thermistor elements 11a to 11f do not come into contact with substances that deteriorate their performance. Also, thermistor elements 11a to 11f
The thermistor elements 11a to 1j are provided through the opening portions 14a to 14j formed in the convex portions 15a to 15j separating the thermistor elements 11a to 11j.
Since air invades the surroundings of 1f, there is no reduction atmosphere due to the sealed state, and the thermistor elements 11a to 11
There is no deterioration of f.
【００１１】尚、前記凸部１５ａ〜１５ｊを絶縁枠体１
３の内部に行くにしたがって小さくしたのは、サーミス
タ素子１１ａ〜１１ｆが位置ずれを起こした場合におい
ても、絶縁枠体１３内部側面にサーミスタ素子１１ａ〜
１１ｆ側面が接触しないためであり、それを満足する形
状であれば四角錐形、または円弧形状にても良い。また
さらに前記凸部１５ａ〜１５ｊに設けた開孔部１４ａ〜
１４ｊの断面積を絶縁枠体１３内部に行くほど小さくし
たのは、サーミスタ素子１１ａ〜１１ｆの性能を劣化さ
せる物質の侵入経路を長くし、その影響を可能な限り少
なくするためである。The convex portions 15a to 15j are connected to the insulating frame 1
3 is made smaller toward the inside, even when the thermistor elements 11a to 11f are displaced, even if the thermistor elements 11a to 11f are displaced.
This is because the side surfaces of 11f do not come into contact with each other, and the shape may be a quadrangular pyramid shape or an arc shape as long as the shape satisfies this. In addition, the opening portions 14a to 15j provided in the convex portions 15a to 15j
The cross-sectional area of 14j is made smaller toward the inside of the insulating frame 13 in order to lengthen the invasion path of a substance that deteriorates the performance of the thermistor elements 11a to 11f and reduce its influence as much as possible.
【００１２】[0012]
【発明の効果】以上のように、本発明によればサーミス
タ素子を劣化させるような雰囲気中においても使用可能
な信頼性の高い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, it is possible to provide a highly reliable thermistor heating element that can be used even in an atmosphere that deteriorates the thermistor element.
【図１】本発明の一実施形態のサーミスタ発熱体の分解
斜視図FIG. 1 is an exploded perspective view of a thermistor heating element according to an embodiment of the present invention.
【図２】本発明の一実施形態のサーミスタ発熱体の断面
図FIG. 2 is a sectional view of a thermistor heating element according to an embodiment of the present invention.
【図３】本発明の一実施形態の絶縁枠体の凸部の部分拡
大平面図FIG. 3 is a partially enlarged plan view of a convex portion of the insulating frame body according to the embodiment of the present invention.
【図４】従来のサーミスタ発熱体の斜視図FIG. 4 is a perspective view of a conventional thermistor heating element.
１１ａ〜１１ｆ サーミスタ素子 １２ａ，１２ｂ 金属放熱体 １３ 絶縁枠体 １４ａ〜１４ｊ 開孔部 １５ａ〜１５ｊ 凸部 11a-11f Thermistor element 12a, 12b Metal heat sink 13 Insulating frame 14a-14j Open hole 15a-15j Convex part
Claims (3)
性サーミスタと、前記正特性サーミスタを収納する絶縁
枠体と、前記正特性サーミスタ両主平面の電極と電気
的、かつ熱的に接続されるように接着剤で固着された金
属放熱体とを有し、前記絶縁枠体はその内部に正特性サ
ーミスタ同士を分離するように凸部を設け、さらにその
凸部には枠体内部に向かって開孔部が形成されている正
特性サーミスタ発熱体。1. A plurality of positive temperature coefficient thermistors having electrodes formed on both principal planes, an insulating frame for accommodating the positive temperature coefficient thermistors, and electrodes on both principal planes of the positive temperature coefficient thermistors electrically and thermally. A metal heat sink fixed by an adhesive so as to be connected, the insulating frame body is provided with a convex portion so as to separate the positive temperature coefficient thermistors from each other, and the convex portion is further provided inside the frame body. PTC thermistor heating element having an opening formed toward the front.
スタ側面が前記絶縁枠体内部側面に直接接触しないよう
に、内部に行くにしたがって小さくなるように形成した
請求項１記載の正特性サーミスタ発熱体。2. The positive portion according to claim 1, wherein the convex portion provided on the insulating frame body is formed so as to become smaller toward the inside so that the side surface of the positive temperature coefficient thermistor does not directly contact the inner side surface of the insulating frame body. Characteristic thermistor heating element.
さは、絶縁枠体内部に向かうにしたがって小さくなるよ
うに形成した請求項１または２に記載の正特性サーミス
タ発熱体。3. The positive temperature coefficient thermistor heating element according to claim 1 or 2, wherein the size of the cross-sectional area of the opening provided in the insulating frame becomes smaller toward the inside of the insulating frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01144596A JP3191655B2 (en) | 1996-01-26 | 1996-01-26 | Positive characteristic thermistor heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01144596A JP3191655B2 (en) | 1996-01-26 | 1996-01-26 | Positive characteristic thermistor heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09204978A true JPH09204978A (en) | 1997-08-05 |
| JP3191655B2 JP3191655B2 (en) | 2001-07-23 |
Family
ID=11778304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01144596A Expired - Fee Related JP3191655B2 (en) | 1996-01-26 | 1996-01-26 | Positive characteristic thermistor heating element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3191655B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001351764A (en) * | 2000-06-06 | 2001-12-21 | Maxshinwa Co Ltd | Positive characteristic ceramic heating element unit |
| WO2006123915A1 (en) * | 2005-05-20 | 2006-11-23 | Modine Korea, Llc | Pre-heater for vehicle |
| KR100730416B1 (en) * | 2003-09-11 | 2007-06-19 | 카템 게엠베하 운트 캄파니 카게 | Electric heating apparatus with housing |
| KR100791665B1 (en) * | 2006-08-22 | 2008-01-03 | 모딘코리아 유한회사 | Ptc rod assembly and pre-heater including the same |
| JP2010135717A (en) * | 2008-12-05 | 2010-06-17 | Hyundai Motor Co Ltd | Ptc load assembly, and ptc heater for vehicle using the same |
| KR100992579B1 (en) * | 2003-09-06 | 2010-11-08 | 자화전자 주식회사 | A electric heater |
| US8872075B2 (en) | 2008-12-05 | 2014-10-28 | Hyundai Motor Company | Positive temperature coefficient (PTC) rod assembly |
| DE102017223779A1 (en) * | 2017-12-22 | 2019-06-27 | Eberspächer Catem Gmbh & Co. Kg | Electric heating device and a method for producing the same |
-
1996
- 1996-01-26 JP JP01144596A patent/JP3191655B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001351764A (en) * | 2000-06-06 | 2001-12-21 | Maxshinwa Co Ltd | Positive characteristic ceramic heating element unit |
| KR100992579B1 (en) * | 2003-09-06 | 2010-11-08 | 자화전자 주식회사 | A electric heater |
| KR100730416B1 (en) * | 2003-09-11 | 2007-06-19 | 카템 게엠베하 운트 캄파니 카게 | Electric heating apparatus with housing |
| WO2006123915A1 (en) * | 2005-05-20 | 2006-11-23 | Modine Korea, Llc | Pre-heater for vehicle |
| KR100791665B1 (en) * | 2006-08-22 | 2008-01-03 | 모딘코리아 유한회사 | Ptc rod assembly and pre-heater including the same |
| JP2010135717A (en) * | 2008-12-05 | 2010-06-17 | Hyundai Motor Co Ltd | Ptc load assembly, and ptc heater for vehicle using the same |
| US8872075B2 (en) | 2008-12-05 | 2014-10-28 | Hyundai Motor Company | Positive temperature coefficient (PTC) rod assembly |
| US8895898B2 (en) | 2008-12-05 | 2014-11-25 | Hyundai Motor Company | Positive temperature coefficient (PTC) rod assembly and PTC heater using the same |
| DE102017223779A1 (en) * | 2017-12-22 | 2019-06-27 | Eberspächer Catem Gmbh & Co. Kg | Electric heating device and a method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3191655B2 (en) | 2001-07-23 |
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