JPH07109786B2 - Heating element - Google Patents
Heating elementInfo
- Publication number
- JPH07109786B2 JPH07109786B2 JP8473786A JP8473786A JPH07109786B2 JP H07109786 B2 JPH07109786 B2 JP H07109786B2 JP 8473786 A JP8473786 A JP 8473786A JP 8473786 A JP8473786 A JP 8473786A JP H07109786 B2 JPH07109786 B2 JP H07109786B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- heating element
- storage material
- latent heat
- temperature
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 〔技術分野〕 この発明は、電流を流すことにより発熱して、潜熱蓄熱
を行う発熱体に関する。Description: TECHNICAL FIELD The present invention relates to a heating element that generates heat by passing an electric current to store latent heat.
温度が高い時にはその熱を蓄え、温度が下がると放熱す
ると言う蓄熱材がある。このものの利用は省エネルギー
にもつながることから、広く実用化することが求められ
ている。There is a heat storage material that stores the heat when the temperature is high and releases the heat when the temperature drops. Since the use of this material leads to energy saving, it is required to be widely put into practical use.
なかでも、パラフィン等の有機系潜熱蓄熱材は、過冷却
が少なく安定で、水分に対しても問題がないなどの長所
を有している。Among them, the organic latent heat storage material such as paraffin has the advantages that it is stable with less supercooling and has no problem with water.
そこで、このような潜熱蓄熱材を利用して、携帯可能
で、繰り返し利用できる発熱体が案出された。それは、
家庭用の電源，車のバッテリにつなぐだけで、簡単に蓄
熱でき、利用できるものである。その発熱体は、第３図
にみるようなものであった。図にみるように、潜熱蓄熱
材11が容器12内に封入され、周囲から電熱ヒータ13によ
り熱せられて、蓄熱が行われる。蓄熱材11が溶け、融点
以上の温度になると、温度センサ14がそれを感知し、制
御装置15により通電が止められるようになっている。16
はカバーである。このような発熱体は、蓄熱材11以外
に、数多くの部品を必要とするので、構成が複雑にな
る。また、蓄熱材11は容器12内に注入されているだけな
ので、いつ洩れるとも限らず、洩れて蓄熱効果が無くな
るということもあった。Therefore, a portable and reusable heating element has been devised using such a latent heat storage material. that is,
It can easily store and use heat just by connecting it to a household power source and a car battery. The heating element was as shown in FIG. As shown in the figure, the latent heat storage material 11 is enclosed in a container 12 and heated from the surroundings by an electric heater 13 to store heat. When the heat storage material 11 melts and reaches a temperature equal to or higher than the melting point, the temperature sensor 14 senses it and the control device 15 stops energization. 16
Is a cover. Such a heating element requires a large number of parts in addition to the heat storage material 11, so the structure becomes complicated. Further, since the heat storage material 11 is only injected into the container 12, it does not always leak and the heat storage effect disappears in some cases.
この発明は、このような問題を解決するためになされた
ものであって、構成が簡単で、潜熱蓄熱材が安定して保
持され、洩れたりするおそれのない発熱体を提供するこ
とをその目的とする。The present invention has been made to solve such a problem, and an object thereof is to provide a heating element that has a simple structure, stably holds a latent heat storage material, and does not leak. And
前記のような目的を達成するために、この発明は温度が
上昇すると融解して膨張し、温度が低下すると凝固して
収縮する有機系潜熱蓄熱材と導電性物質を含む高分子物
質からなるPCT特性を示す成形体に通電手段が備えられ
てなる発熱体をその要旨とする。In order to achieve the above-mentioned object, the present invention is a PCT composed of a polymeric substance containing an organic latent heat storage material that melts and expands when the temperature rises and solidifies and contracts when the temperature drops and a conductive substance. The gist of the present invention is a heating element in which a molded body exhibiting characteristics is provided with an energizing means.
以下に、この発明を、その一実施例をあらわす図面とと
もに説明する。The present invention will be described below with reference to the drawings showing an embodiment thereof.
第１図は、この発明にかかる発熱体の一実施例をあらわ
す。発熱体１は、有機系潜熱蓄熱材と導電性物質を含む
高分子物質からなるシート状の成形体を通電手段たる電
極2,2で挟んでなり、コンセント３を介して適当な電源
につないで使用するようになっている。有機系潜熱蓄熱
材としては、パラフィン系，油脂系が用いられる。高分
子物質としては、上記潜熱蓄熱材を吸収して膨潤するゴ
ム，ポリエチレンが挙げられる。導電性物質としては、
たとえば、カーボンの粉末あるいは繊維状にしたものを
用いる。ゴムに上記潜熱蓄熱材および導電性物質を混入
させるには、まず、全部を混合したのち、加圧ニーダ等
で混練すればよい。ポリエチレンに混入させる場合は、
その軟化点（約120℃）以上の温度でポリエチレンを液
状にして潜熱蓄熱材融解液を吸収させ、膨潤させるとと
もに、導電性物質を混合すればよい。通常、ポリエチレ
ンに対しては、重量比80％程度、ゴムに対しては40％程
度まで潜熱蓄熱材を含ませることができる。これを、通
常のポリエチレンやゴムと同様にして、所望の形状に成
形し、両側を電極２で挟む。成形は、たとえば、ポリエ
チレンの場合、高温にして軟化させた後、押し出しある
いはプレスで成形する。潜熱蓄熱材は高分子物質中に含
まれているので溶け出さない。そのため、この発熱体
は、含有されている潜熱蓄熱材の融点以上の温度になっ
ても固体として扱うことができ、潜熱蓄熱材が滲み出し
てくることは殆どないので、密閉容器などに入れなくと
も、簡単なカバーをかけるだけで使用できる。FIG. 1 shows an embodiment of a heating element according to the present invention. The heating element 1 is formed by sandwiching a sheet-shaped molded body made of a polymer material containing an organic latent heat storage material and a conductive material between electrodes 2 serving as a current-carrying means and connected to an appropriate power source via an outlet 3. It is designed to be used. As the organic latent heat storage material, a paraffin type or a fat type is used. Examples of the polymer substance include rubber and polyethylene that absorb the latent heat storage material and swell. As the conductive substance,
For example, carbon powder or fibrous material is used. In order to mix the latent heat storage material and the conductive substance into the rubber, first, all of them may be mixed and then kneaded with a pressure kneader or the like. When mixing with polyethylene,
At a temperature above the softening point (about 120 ° C.), polyethylene may be made into a liquid state to absorb the latent heat storage material melt and swell, and a conductive substance may be mixed. Usually, a latent heat storage material can be contained up to about 80% by weight for polyethylene and about 40% for rubber. This is molded into a desired shape in the same manner as ordinary polyethylene or rubber, and both sides are sandwiched by the electrodes 2. For example, in the case of polyethylene, the polyethylene is extruded or pressed after being softened at a high temperature. Since the latent heat storage material is contained in the polymer substance, it does not melt out. Therefore, this heating element can be handled as a solid even when the temperature exceeds the melting point of the latent heat storage material contained, and the latent heat storage material rarely seeps out, so do not put it in a closed container etc. Both can be used just by putting on a simple cover.
この発熱体を拡大して模式的に示すと第２図（ａ），
（ｂ）にみるようである。通常の状態は第２図（ａ）の
ようで、シートのマトリクスたる高分子物質５内におい
て、電極２間に導電性粒子６を伝って導電パスが存在す
るため、電流が流れると発熱する。この発熱により導電
性粒子６を取り囲む結晶性樹脂たる潜熱蓄熱材４が溶解
し膨張してくると、第２図（ｂ）のような状態となる。
すると、導電性粒子６間の距離が増して電極間の抵抗値
は大きくなり、導電パスが切れ、発熱作用が停止して、
発熱体はそれ以上に温度が上がらない。FIG. 2 (a) shows an enlarged schematic view of this heating element.
Seems to be seen in (b). The normal state is as shown in FIG. 2A. In the polymer substance 5 which is the matrix of the sheet, there is a conductive path between the electrodes 2 through the conductive particles 6, so that heat is generated when a current flows. When the latent heat storage material 4, which is a crystalline resin surrounding the conductive particles 6, is melted and expanded by this heat generation, a state as shown in FIG. 2B is obtained.
Then, the distance between the conductive particles 6 increases, the resistance value between the electrodes increases, the conductive path is cut off, and the heat generation function stops.
The heating element does not heat up further.
つまり、この発明にかかる発熱体は、温度の上昇によ
り、含有する潜熱蓄熱材が融解・凝固して膨張・収縮
し、その結果、発熱体の電気抵抗が変化する。その変化
は、温度が上昇すると抵抗が増すというPTC（Positive
Temperatura Coefficient）特性を示すので、通電を開
始して発熱体が熱せられ、ある一定の温度に達すると潜
熱蓄熱材が融解して、潜熱蓄熱を行い、通電は自動的に
停止する。そして発熱体が放熱を行って凝固すると、再
び、通電が始まるという仕組みになっている。その結
果、状来のようにヒータや温度センサ，制御装置を必要
とせずに効果的に潜熱蓄熱を行うことが可能となった。That is, in the heating element according to the present invention, when the temperature rises, the latent heat storage material contained therein melts and solidifies, expands and contracts, and as a result, the electrical resistance of the heating element changes. The change is the PTC (Positive) that the resistance increases as the temperature rises.
Temperatura Coefficient) characteristics, so that the energization starts and the heating element is heated, and when the temperature reaches a certain temperature, the latent heat storage material melts, latent heat storage is performed, and energization is automatically stopped. Then, when the heating element radiates heat and solidifies, energization starts again. As a result, it has become possible to effectively store latent heat without the need for a heater, a temperature sensor, and a control device as in the past.
この発明にかかる発熱体は、前記実施例に限られない。
有機系潜熱蓄熱材や高分子物質，導電性物質は、上記の
ものに限られない。The heating element according to the present invention is not limited to the above embodiment.
The organic latent heat storage material, the polymer substance, and the conductive substance are not limited to the above.
この発明にかかる発熱体は、以上のように構成されてい
るので、簡単な構造で潜熱蓄熱を行うことができ、ま
た、潜熱蓄熱材が洩れたりしない利点がある。Since the heating element according to the present invention is configured as described above, it has an advantage that latent heat storage can be performed with a simple structure and that the latent heat storage material does not leak.
第１図はこの発明にかかる発熱体の一実施例をあらわす
斜視図、第２図（ａ），（ｂ）はその一部断面の模式図
で第２図（ａ）は通電時を、第２図（ｂ）は通電が停止
した状態をそれぞれあらわす図、第３図は従来の発熱体
の構造の説明図である。 １……発熱体、２……通電手段、４……有機系潜熱蓄熱
材、５……高分子物質、６……導電性物質FIG. 1 is a perspective view showing an embodiment of a heating element according to the present invention, FIGS. 2 (a) and 2 (b) are schematic views of partial cross sections thereof, and FIG. FIG. 2 (b) is a diagram showing a state in which energization is stopped, and FIG. 3 is an explanatory diagram of the structure of a conventional heating element. 1 ... Heating element, 2 ... Energizing means, 4 ... Organic latent heat storage material, 5 ... Polymer material, 6 ... Conductive material
Claims (1)
低下すると凝固して収縮する有機系潜熱蓄熱材と導電性
物質を含む高分子物質からなるPCT特性を示す成形体に
通電手段が備えられてなる発熱体。1. A current-carrying means for a molded body having a PCT characteristic comprising a polymeric substance containing an organic latent heat storage material that melts and expands when the temperature rises and solidifies and contracts when the temperature drops and a conductive substance. A heating element provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8473786A JPH07109786B2 (en) | 1986-04-11 | 1986-04-11 | Heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8473786A JPH07109786B2 (en) | 1986-04-11 | 1986-04-11 | Heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62241287A JPS62241287A (en) | 1987-10-21 |
| JPH07109786B2 true JPH07109786B2 (en) | 1995-11-22 |
Family
ID=13839009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8473786A Expired - Lifetime JPH07109786B2 (en) | 1986-04-11 | 1986-04-11 | Heating element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07109786B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7019613B2 (en) | 2002-06-24 | 2006-03-28 | Tdk Corporation | PTC thermistor body, PTC thermistor, method of making PTC thermistor body, and method of making PTC thermistor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5932129A (en) | 1995-02-27 | 1999-08-03 | Vesture Corporation | Thermal retention device |
| US6936791B1 (en) | 1996-09-06 | 2005-08-30 | Vesture Acquisition Corporation | Thermal storage and transport |
| US6121578A (en) | 1998-03-17 | 2000-09-19 | Vesture Corporation | Wrap heater and method for heating food product |
| US6392201B1 (en) | 2000-08-16 | 2002-05-21 | Vesture Corporation | Catering apparatus and method for delivering heated food product |
-
1986
- 1986-04-11 JP JP8473786A patent/JPH07109786B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7019613B2 (en) | 2002-06-24 | 2006-03-28 | Tdk Corporation | PTC thermistor body, PTC thermistor, method of making PTC thermistor body, and method of making PTC thermistor |
| EP1752993A2 (en) | 2002-06-24 | 2007-02-14 | TDK Corporation | PTC thermistor body and PTC thermistor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62241287A (en) | 1987-10-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |