JPS63207083A - Cartridge heater - Google Patents
Cartridge heaterInfo
- Publication number
- JPS63207083A JPS63207083A JP4079887A JP4079887A JPS63207083A JP S63207083 A JPS63207083 A JP S63207083A JP 4079887 A JP4079887 A JP 4079887A JP 4079887 A JP4079887 A JP 4079887A JP S63207083 A JPS63207083 A JP S63207083A
- Authority
- JP
- Japan
- Prior art keywords
- heater
- temperature coefficient
- positive temperature
- coefficient thermistor
- electrodes
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 32
- 239000011810 insulating material Substances 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 20
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Resistance Heating (AREA)
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〉
本発明はカートリッジヒータ（以下単にヒータという）
に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cartridge heater (hereinafter simply referred to as a heater).
Regarding.
種々の構造乃至形状のヒータが色々な産業分野で広く利
用されている。該ヒータは例えば、密閉系又は開放系の
容器内で水を代表とする被熱物を加熱する場合、該容器
へ簡単に装着使用される。Heaters of various structures and shapes are widely used in various industrial fields. For example, when heating an object to be heated, typically water, in a closed or open container, the heater is easily attached to the container.
本発明はこのようなヒータ、特に正特性サーミスタ素子
を用いるヒータに関するものである。The present invention relates to such a heater, particularly to a heater using a positive temperature coefficient thermistor element.
〈従来の技術、その問題点〉
従来、金属製の密封パイプ内に電熱線が巻線装入され、
そして熱伝導性の絶縁粉末が充填されたヒータが使用さ
れている。<Conventional technology and its problems> Conventionally, a heating wire is wound inside a metal sealed pipe.
A heater filled with thermally conductive insulating powder is used.
ところが、かかる従来のヒータによると、次のような問
題点がある。However, such conventional heaters have the following problems.
ｌ）使用により金属製パイプの外周面にスケールが付着
し、これが順次肥大化して、該スケールがヒータとこれ
を装着した容器内の被熱物との間の熱伝導性を阻害する
のであるが、この場合、被熱物の加熱温度を所望通り確
保しようとすれば、ヒータそれ自体は過剰高温にならざ
るを得す、その結果しばしば、ヒータ内部が損傷してし
まう、特に、ヒータを過剰高温のままで使用し続けると
、ついにはスケールが炭化して、これが更に一層、ヒー
タの内部損傷を助長し、場合によっては金属製パイプが
孔食されてしまう。l) As the metal pipe is used, scale adheres to the outer circumferential surface of the metal pipe, which gradually enlarges and impedes thermal conductivity between the heater and the object to be heated in the container in which it is installed. In this case, in order to ensure the desired heating temperature of the object to be heated, the heater itself has to reach an excessively high temperature, which often results in damage to the inside of the heater. If you continue to use it as it is, the scale will eventually carbonize, which will further promote internal damage to the heater and, in some cases, lead to pitting of the metal pipe.
２）空焼き等の異常過熱を防止して、ヒータを装着した
容器を含む装置全体の安全を図るため、サーモスタット
の如き保護部材の付設が不可欠であり、それだけ装置全
体の構造が複雑で且つ高価になる。また、上記のような
空焼き等に備えるため、必然に容器が金属製のものとな
り、それだけ重量にも富む。2) In order to prevent abnormal overheating such as dry firing and ensure the safety of the entire device including the container equipped with the heater, it is essential to install a protective member such as a thermostat, which makes the structure of the entire device complex and expensive. become. In addition, in order to prepare for dry baking as described above, the container is inevitably made of metal, which increases the weight accordingly.
〈発明が解決しようとする問題点、その解決手段〉
本発明は叙上の如き従来の問題点を解決する新たなヒー
タを提供するものである。<Problems to be Solved by the Invention and Means for Solving the Problems> The present invention provides a new heater that solves the conventional problems as described above.
しかして本発明者は、上記観点で鋭意検討した結果、ヒ
ータの発熱源として正特性サーミスタ素子を用いると、
該ヒータそれ自体に自己保護機能を持たせることができ
、しかもかかる自己保１ｌＩＪａ俺を発揮させつつ正特
性サーミスタ素子のいわば反発作用に打ち勝って該ヒー
タの出力を上げるためには、その熱放出を助長させるこ
とが必要であり、該熱放出を助長させるためにはヒータ
の外周面に凹凸部を形成させてヒータと被熱物との接触
面積を大きくするのが重要であることを見出し、本発明
を完成するに至った。However, as a result of intensive studies from the above viewpoint, the inventor of the present invention found that when a positive temperature coefficient thermistor element is used as a heat generation source of a heater,
The heater itself can have a self-protection function, and in order to overcome the so-called repulsion of the positive temperature coefficient thermistor element and increase the output of the heater while exerting its self-protection function, it is necessary to reduce its heat release. We discovered that it is important to increase the contact area between the heater and the object to be heated by forming irregularities on the outer circumferential surface of the heater in order to promote heat release. The invention was completed.
すなわち本発明は、
外周面に凹凸部が形成された金属製の密封パイプ内に、
リード線装着の電極が該電極の外周に嵌着の絶縁材を介
して位置決めされ、該電極で両側から正特性サーミスタ
素子が挾持されていて、電極及び正特性サーミスタ素子
が圧密化された熱伝導性の絶縁粉末で密着固定されてお
り、該密封パイプの基端から端子部が取り出されて成る
ヒータに係る。In other words, the present invention provides a metal sealed pipe with an uneven surface formed on its outer circumferential surface.
An electrode attached to a lead wire is positioned on the outer periphery of the electrode via an insulating material fitted, and a positive temperature coefficient thermistor element is sandwiched between the electrodes from both sides, and the electrode and the positive temperature coefficient thermistor element are compacted. The present invention relates to a heater in which the terminal portion is taken out from the base end of the sealed pipe, and the terminal portion is tightly fixed with a dielectric insulating powder.
以下２図面に基いて本発明の構成を更に詳細に説明する
。The configuration of the present invention will be explained in more detail based on the following two drawings.
〈実施例、その作用〉
第１図は本発明の一実施例を示す縦断面図（一部省略）
、第２図は該−実施例の横断面図である、先端が例えば
溶接により閉設され、基端が絶縁弾性を有する栓材１１
で密封されている金属製パイプ２１内に、アルミニウム
製の電極３１ａ、３１ｂによって両側から挾持された正
特性サーミスタ素子４１ａ 〜４１ｄが、電極３１ａ、
３１ｂの外周に２個所で嵌着の絶縁材５１ａ、５１ｂを
介して位置決めされている０図示した実施例の場合、絶
縁材５１ａは周端がリング状に突設された円板形状であ
り、また絶縁材５１ｂはリング形状であるが、絶縁材５
１ａは電極３１ａ、３１ｂと金属製パイプ２１の先端閉
設面との間の絶縁機能をも果たすために円板形状となっ
ている。したがって、そのような絶縁機能を果たすもの
として例えば円板形状の碍子を別に介在させれば、絶縁
材５１ａに相当するものは絶縁材５１ｂと同様に単なる
リング形状とすることができる。<Embodiment and its operation> Fig. 1 is a vertical sectional view (partially omitted) showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of this embodiment, in which a plug material 11 whose distal end is closed by welding, for example, and whose proximal end has insulating elasticity.
Positive temperature coefficient thermistor elements 41a to 41d, which are sandwiched from both sides by aluminum electrodes 31a and 31b, are placed inside a metal pipe 21 that is sealed by electrodes 31a and 31b.
In the illustrated embodiment, the insulating material 51a is in the shape of a disc with a ring-shaped protruding peripheral end, Further, the insulating material 51b is ring-shaped;
1a has a disk shape in order to also serve as an insulator between the electrodes 31a, 31b and the closed end surface of the metal pipe 21. Therefore, if, for example, a disc-shaped insulator is separately interposed to perform such an insulating function, the insulating material 51a can be made into a simple ring shape like the insulating material 51b.
また、前記電極３１ａ、３１ｂにはその並行する貫通孔
にリード線６１ａ、Ｂｌｂが挿入されていて、このリー
ドｌｉｅ １ ａ 、 ６ ｌ ｂの端子部６２ａ、６
２ｂが線材１１を貫通して外部へ取り出されている。更
に金属製パイプ２１内の間隙には熱伝導性の絶縁粉末７
１が充填されており、この絶縁粉末７１は圧密化されて
いて、電極３１ａ、３１ｂ及び正特性サーミスタ素子４
１ａ〜４１ｄは、絶縁材５１ａ、５１ｂの補助を得つつ
圧密化された絶縁粉末７１によって密着固定されている
。Further, lead wires 61a and Blb are inserted into the parallel through holes of the electrodes 31a and 31b, and terminal portions 62a and 6 of these leads lie1a and 6lb
2b penetrates the wire rod 11 and is taken out to the outside. Furthermore, thermally conductive insulating powder 7 is placed in the gap within the metal pipe 21.
1, and this insulating powder 71 is compacted, and the electrodes 31a, 31b and the positive temperature coefficient thermistor element 4
1a to 41d are closely fixed by compacted insulating powder 71 with the help of insulating materials 51a and 51b.
そして、金属製パイプ２１の外周面には凹凸部を形成す
るものとして複数の独立したリング状片２１ａが軸と直
交する方向で立設されている。A plurality of independent ring-shaped pieces 21a are erected on the outer peripheral surface of the metal pipe 21 in a direction perpendicular to the axis to form uneven portions.
第３図は本発明の他の一実施例を示す横断面図である。FIG. 3 is a cross-sectional view showing another embodiment of the present invention.
第３図の実施例の場合、金属製パイプ２２、電極３２ａ
、３２ｂ、正特性サーミスタ素子４２ｄ、絶縁材５２ｂ
、リード線６３ａ、６３ｂ及び圧密化された絶縁粉末７
２の全体の相互関係は、次の諸点を除き、第１図及び′
第２図の実施例と同様になっている。すなわち第３図の
実施例では、金属製パイプ２２の外周面に凹凸部を形成
するものとして複数の独立した板状片２２ａが軸方向で
立設され、正特性サーミスタ素子４２ｄが両側の電極３
２ａ、３２ｂに相対向して陥設の凹部に嵌合していて、
リード線８３ａ、８３ｂが電極３２ａ、３２ｂの周面に
陥設の小凹部３２ｃ 、 ３２ｄに埋設されて該小凹部
３２ｃ 、３２ｄの開口が圧縮されることによって固定
されており、絶縁材５２ｂが単純なリング形状に構成さ
れている。In the case of the embodiment shown in FIG. 3, the metal pipe 22, the electrode 32a
, 32b, positive temperature coefficient thermistor element 42d, insulating material 52b
, lead wires 63a, 63b and compacted insulating powder 7
The overall interrelationship of 2 is as shown in Figure 1 and '
It is similar to the embodiment shown in FIG. That is, in the embodiment shown in FIG. 3, a plurality of independent plate-shaped pieces 22a are erected in the axial direction to form uneven portions on the outer peripheral surface of the metal pipe 22, and the positive temperature coefficient thermistor elements 42d are connected to the electrodes 3 on both sides.
2a and 32b, and are fitted into recessed portions facing each other,
The lead wires 83a, 83b are embedded in small recesses 32c, 32d recessed in the circumferential surfaces of the electrodes 32a, 32b, and are fixed by compressing the openings of the small recesses 32c, 32d. It is constructed in a ring shape.
第１図及び第２図の実施例では、金属製パイプ２１内の
間隙へ絶縁粉末７１を充填するとき、絶縁材５１ｂの切
欠部５１ｃが利用されるが、第３図の実施例では、金属
製パイプ２２内の間隙へ絶縁粉末７２を充填するとき、
電極３２ａ、３２ｂ及び正特性サーミスタ素子４２ｄ並
びに絶縁材５２ｂで結果的に形成される小間隙５２ｃが
利用されるのである。In the embodiment shown in FIGS. 1 and 2, the notch 51c of the insulating material 51b is used when filling the gap in the metal pipe 21 with the insulating powder 71, but in the embodiment shown in FIG. When filling the gap in the manufactured pipe 22 with the insulating powder 72,
The resulting small gap 52c formed between the electrodes 32a, 32b, the positive temperature coefficient thermistor element 42d, and the insulating material 52b is utilized.
第４図と第５図は本発明のそれぞれ更に他の一実施例に
ついて電極に対する正特性サーミスタ素子の位置決め状
態を示す要部縦断面図である。第４図の場合、正特性サ
ーミスタ素子４３ａ〜４３Ｃは、その両側から電極３３
ａ、３３ｂで挾持される如く、所定間隔で配置されてい
る。また第５図の場合、正特性サーミスタ素子４４ａ〜
４４ｃは同様に所定間隔で配置されているが、両側の電
極３４ａ、３４ｂに相対向して陥設の凹部に嵌合してい
る。FIGS. 4 and 5 are longitudinal cross-sectional views of essential parts showing the positioning of the positive temperature coefficient thermistor element with respect to the electrodes in still other embodiments of the present invention. In the case of FIG. 4, the positive temperature coefficient thermistor elements 43a to 43C are connected to the electrodes 33 from both sides.
They are arranged at a predetermined interval so as to be sandwiched between a and 33b. In addition, in the case of FIG. 5, positive temperature coefficient thermistor elements 44a to
The electrodes 44c are similarly arranged at predetermined intervals, but are fitted into the recessed portions facing the electrodes 34a and 34b on both sides.
第６図は本発明に係るヒータの使用状態を例示する略視
図である。密閉系の容器８１にヒータ１Ｏがネジ止め装
着されており、ヒータ１０に相応の電圧を付加して、容
器８１の下側から送入した液体を加熱し、加熱後の液体
を容器８１の上側から送出する構成である。この場合、
ヒータ１０の発熱源である正特性サーミスタ素子の自己
保護機能があるため、わざわざサーモスタットの如き保
護部材を別に付設する必要がなく、また容器８１として
例えばプラスチック製のものをも使用することができる
のである。FIG. 6 is a schematic perspective view illustrating the usage state of the heater according to the present invention. A heater 1O is screwed to the closed container 81, and a suitable voltage is applied to the heater 10 to heat the liquid introduced from the bottom of the container 81, and the heated liquid is transferred to the top of the container 81. It is configured to send data from in this case,
Since the PTC thermistor element, which is the heat generation source of the heater 10, has a self-protection function, there is no need to separately attach a protective member such as a thermostat, and the container 81 can be made of plastic, for example. be.
次に本発明に係るヒータの製造手順を簡単に説明する。Next, the manufacturing procedure of the heater according to the present invention will be briefly explained.
先ず、先端が閉設の金属製パイプを用意する。別に、リ
ード線を装着した電極を２片用意し、これらの電極間に
複数個の正特性サーミスタ素子を挾持するようにして該
電極の外周へ絶縁材を嵌着し、該絶縁材を摺接しつつ正
特性サーミスタ素子を挾持した電極を前記金属製パイプ
内へ装入する。この装入は、絶縁材で規制されるため、
自動的に金属製パイプ内へ位置決めされる。前述したよ
うに、電極へ嵌着した絶縁材が例えば単なるリング形状
であって、該電極と金属製パイプの先端閉設面との間の
絶縁機能を果たさない場合には、金属製パイプ内の先端
閉設面へ碍子のような別の絶縁材を装入しておく０次に
、金属製パイプ内の間隙へ絶縁粉末を充填する。この充
填は、図示した実施例を引用すると、第２図における絶
縁材５１ｂの切欠部５１ｃや第３図における小間隙５２
ｃを利用して行なう、絶縁粉末を充填後、金属製パイプ
の基端へ、端子部を取り出すようにして栓材を嵌入する
。そして、以上の工程を経た金属製パイプをその外周面
から中心軸方向へ押圧して減径する。この減径手段によ
り、絶縁粉末が圧密化され、電極及び正特性サーミスタ
素子が絶縁材の補助を得つつ密着固定される。最後に、
減径した金属製パイプの外周面に凹凸部を形成する。First, prepare a metal pipe with a closed end. Separately, two pieces of electrodes with lead wires attached are prepared, an insulating material is fitted around the outer periphery of the electrodes with a plurality of positive temperature coefficient thermistor elements sandwiched between these electrodes, and the insulating material is slid into contact with the electrodes. At the same time, the electrodes holding the positive temperature coefficient thermistor element are inserted into the metal pipe. This charge is regulated by the insulation material, so
Automatically positioned into metal pipe. As mentioned above, if the insulating material fitted to the electrode is, for example, in a simple ring shape and does not function as an insulator between the electrode and the closed end surface of the metal pipe, Another insulating material such as an insulator is inserted into the end-closing surface.Next, the gap in the metal pipe is filled with insulating powder. Referring to the illustrated embodiment, this filling can be carried out in the notch 51c of the insulating material 51b in FIG. 2 or in the small gap 52 in FIG. 3.
After filling with insulating powder using method c, the plug material is inserted into the base end of the metal pipe so as to take out the terminal part. Then, the metal pipe that has gone through the above steps is pressed from its outer peripheral surface toward the central axis to reduce its diameter. By this diameter reducing means, the insulating powder is compacted, and the electrodes and the positive temperature coefficient thermistor element are closely fixed with the aid of the insulating material. lastly,
An uneven portion is formed on the outer peripheral surface of the metal pipe whose diameter has been reduced.
いうまでもなく、予め凹凸部を形成しておいた金属製パ
イプを使用することもできる。Needless to say, it is also possible to use a metal pipe on which uneven portions have been formed in advance.
本発明において、金属製パイプは、図示した断面円形の
ものに限らず、断面楕円形や断面角形のものも使用でき
る。またかかる金属製パイプの外周に形成する凹凸部は
、図示したような独立のリング状片や板状片に限らず、
連続した螺線状片であってもよいし、更には金属製パイ
プそれ自体に溝切りを施したものであってもよく、これ
らは溶接や切削等により形成する。かくして金属製パイ
プの外周面に形成した凹凸部は重要な役割を持つ、該凹
凸部によってヒータと被熱物との間の接触面積が大きく
なり、それだけヒータの熱放出が助長されて、その結果
、正特性サーミスタ素子を発熱源とする該ヒータの出力
を上げることができるからである。ヒータの出力を上げ
れば、それだけ被熱物を迅速に加熱することができるの
はいうまでもない、凹凸部が形成されていないと、ヒー
タと被熱物との間の接触面積が少なくなり、したがって
ヒータの熱放出も少なくなって、熱がヒータ内に滞る状
態となり、かかる状態ではその性質上、正特性サーミス
タ素子のいわば反発作用によってヒータの出力が上がら
なくなってしまう、この点は、電熱線を発熱源として、
熱放出とは無関係にその出力を上げることができる従来
のヒータと大きく異なる。In the present invention, the metal pipe is not limited to the circular cross-section shown in the drawings, but also those with an elliptical cross-section or a rectangular cross-section can be used. In addition, the uneven parts formed on the outer periphery of such metal pipes are not limited to independent ring-shaped pieces or plate-shaped pieces as shown in the figure.
It may be a continuous spiral piece, or it may be a metal pipe itself with grooves, and these are formed by welding, cutting, or the like. In this way, the unevenness formed on the outer circumferential surface of the metal pipe plays an important role.The unevenness increases the contact area between the heater and the object to be heated, which promotes heat release from the heater, and as a result. This is because it is possible to increase the output of the heater whose heat generation source is a positive temperature coefficient thermistor element. It goes without saying that the higher the output of the heater, the faster the object to be heated can be heated.If there are no uneven parts, the contact area between the heater and the object to be heated will be reduced. Therefore, the amount of heat emitted from the heater decreases, and the heat stays inside the heater.In such a state, due to the nature of this condition, the output of the heater does not increase due to the so-called repulsive action of the positive temperature coefficient thermistor element. as a heat source,
This is significantly different from conventional heaters, which can increase their output independently of heat release.
第７図は次のような諸数値のヒータを使用して水を加熱
したときの、水温（”Ｏ）と出力（Ｗ）との関係を例示
するグラフである。ヒータ諸数値：外径ｉｏｍｓ（凹凸
部を除く外径）、長さ６５ｍｍ、発熱部長３５ｍｍ、入
力電圧２００Ｖ、図中、出力曲線Ａは第１図及び第２図
に示した実施例であって（外表面積が出力曲線Ｂの場合
の約２倍）、絶縁粉末として窒化ホウ素粉末を使用した
本発明に係る場合、出力曲線Ｂは、他の構成は全く同じ
にして、凹凸部を形成しないことだけが異なるヒータの
場合である。この第７図からも、外周面に凹凸部を形成
させることの重要性が明らかである。Figure 7 is a graph illustrating the relationship between water temperature (O) and output (W) when water is heated using a heater with the following values.Heater values: outer diameter ioms (outer diameter excluding uneven parts), length 65 mm, heat generating part 35 mm, input voltage 200 V, output curve A in the figure is the embodiment shown in FIGS. 1 and 2 (outer surface area is output curve B In the case of the present invention using boron nitride powder as the insulating powder, the output curve B is for the case of a heater whose other configuration is exactly the same but whose only difference is that no uneven portion is formed. The importance of forming uneven portions on the outer circumferential surface is also clear from FIG.
また本発明において、電極の外周へ嵌着する絶縁材も重
要な役割を持つ、すなわち、該絶縁材は、電極間に正特
性サーミスタ素子を安定挾持してそれらの取り扱いを著
しく容易にし、また正特性サーミスタ素子を挾持した電
極を金属製パイプ内へ装入するときにその装入を自動的
に位置決めし、そして金属製パイプ内の間隙へ絶縁粉末
を充填するときやその後に該金属製パイプを減径すると
きに絶縁粉末が電極と正特性サーミスタ素子との間へ混
入する不都合を完全防止するのである。かかる絶縁材は
、金属製パイプや電極更には正特性サーミスタ素子との
関係で種々の形状のものが適用され得るが、好ましくは
フッ素系ゴムのような素材を使用するのがよい。In addition, in the present invention, the insulating material fitted around the outer periphery of the electrodes also plays an important role. That is, the insulating material stably holds the positive temperature coefficient thermistor elements between the electrodes, making their handling extremely easy, and When an electrode holding a characteristic thermistor element is inserted into a metal pipe, the electrode is automatically positioned, and the metal pipe is automatically positioned when filling an insulating powder into a gap in the metal pipe or afterward. This completely prevents the inconvenience of insulating powder getting mixed into the space between the electrode and the positive temperature coefficient thermistor element when the diameter is reduced. The insulating material may have various shapes depending on the relationship with the metal pipe, the electrode, and the positive temperature coefficient thermistor element, but it is preferable to use a material such as fluororubber.
更に本発明において、正特性サーミスタ素子は、その平
面形状が円板形、角板形、ドーナツ形等、既に重版され
ている各種形状のものが適用され得る。該正特性サーミ
スタ素子は、組合わせの素材特性により、ある特定の温
度で急激に電気抵抗が増加し、したがって該特定温度に
なると電流値が急減して、加熱温度を一定に保つという
自己保護機能的特性を備える１本発明は、かかる正特性
サーミスタ素子の特性を最大限に活用して、一方で被加
熱物を迅速に加熱しつつその温度を一定に保ち、他方で
該正特性サーミスタ素子を組込んだヒータの自己損傷を
防止するものである。したがって、本発明に係るヒータ
に組込まれる正特性サーミスタ素子は、該ヒータの用途
との関係において、その組合せ素材や形状（平面積、厚
さ）が適宜選定される。Further, in the present invention, the positive temperature coefficient thermistor element may have various shapes that have already been reprinted, such as a disk shape, a square plate shape, a donut shape, etc. in plan view. The positive temperature coefficient thermistor element has a self-protection function in which the electrical resistance increases rapidly at a certain temperature due to the material properties of the combination, and therefore the current value suddenly decreases when the certain temperature is reached to keep the heating temperature constant. The present invention makes full use of the characteristics of such a PTC thermistor element to quickly heat an object while keeping its temperature constant, and on the other hand, to This prevents self-damage of the built-in heater. Therefore, the combination of materials and shape (planar area, thickness) of the positive temperature coefficient thermistor element to be incorporated into the heater according to the present invention are appropriately selected in relation to the use of the heater.
そして本発明において、絶縁粉末は、従来一般に絶縁粉
末として充填されている酸化マグネシウムであってもよ
いが、窒化ホウ素やアルミナ更にはベリリヤ等の粉末を
使用するのが好ましい、これらは、酸化マグネシウムに
比べて、充分な絶縁性及びはるかに高い熱伝導性を有す
る。In the present invention, the insulating powder may be magnesium oxide, which is conventionally filled as an insulating powder, but it is preferable to use powders such as boron nitride, alumina, and beryllia. In comparison, it has sufficient insulation properties and much higher thermal conductivity.
〈発明の効果〉
以上説明した通りであるから、本発明には、被熱物を迅
速に加熱することができる効果の他に、ヒータの自己損
傷がなく、また別にサーモスタットの如き保護部材を付
設する必要もなく、更にはヒータを装着する容器として
例えばプラスチック製のものをも使用し得るため、装置
全体を構造簡単にして軽量且つ安値なものとすることが
できる効果がある。<Effects of the Invention> As explained above, the present invention has the advantage that, in addition to being able to quickly heat an object to be heated, there is no self-damage of the heater, and a protective member such as a thermostat is separately attached. Furthermore, since a container made of plastic, for example, can be used as the container in which the heater is attached, the overall structure of the device can be simplified, making it lightweight and inexpensive.
第１図は本発明の一実施例を示す縦断面図（一部省略）
、第２図は該−実施例を示す横断面図、第３図は本発明
の他の一実施例を示す横断面図。
第４図と第５図は本発明のそれぞれ更に他の一実施例を
示す要部縦断面図、第６図は本発明に係るヒータの使用
状態を例示する略視図、第７図は本発明に係るヒータも
含めてその出力状況を例示するグラフである。
１０・・ヒータ、１１争・栓材
２１．２２・・金属製パイプ
２１ａ番・リング状片、２２ａ＊ ＠板状片３１ａ、３
１ｂ、３２ａ、３２ｂ、３３ａ、３３ｂ、３４ａ、３４
ｂａ番電極
４１ａ 〜４１ｄ、４２ｄ、４３ａ 〜４３ｃ、４４ａ
〜４４ｃｅ・正特性サーミスタ素子５１ａ、５１ｂ、５
２ｂｓ＊絶縁材
５１ｃ・・切欠部、５２Ｃ＠１１小間隙６１ａ、Ｂｌｂ
、６３ａ、８３ｂ＊＊ リード線６２ａ、６２ｂｅ＊
端子部
７１．７２・・絶縁粉末FIG. 1 is a longitudinal sectional view (partially omitted) showing an embodiment of the present invention.
, FIG. 2 is a cross-sectional view showing this embodiment, and FIG. 3 is a cross-sectional view showing another embodiment of the present invention. 4 and 5 are longitudinal cross-sectional views of main parts showing still other embodiments of the present invention, FIG. 6 is a schematic diagram illustrating the usage state of the heater according to the present invention, and FIG. It is a graph illustrating the output status including the heater according to the invention. 10..Heater, 11.Plug material 21.22..Metal pipe number 21a, ring-shaped piece, 22a* @ plate-shaped piece 31a, 3
1b, 32a, 32b, 33a, 33b, 34a, 34
ba number electrodes 41a to 41d, 42d, 43a to 43c, 44a
~44ce・Positive temperature coefficient thermistor elements 51a, 51b, 5
2bs*Insulating material 51c...notch, 52C@11 small gap 61a, Blb
, 63a, 83b** Lead wires 62a, 62be*
Terminal part 71.72...Insulating powder
Claims (1)
に、リード線装着の電極が該電極の外周に嵌着の絶縁材
を介して位置決めされ、該電極で両側から正特性サーミ
スタ素子が挾持されていて、電極及び正特性サーミスタ
素子が圧密化された熱伝導性の絶縁粉末で密着固定され
ており、該密封パイプの基端から端子部が取り出されて
成るカートリッジヒータ。1. An electrode with a lead wire attached is positioned in a metal sealed pipe with an uneven surface formed through an insulating material fitted to the outer periphery of the electrode, and a positive temperature coefficient thermistor element is inserted from both sides with the electrode. A cartridge heater, in which the electrodes and the positive temperature coefficient thermistor element are closely fixed with compacted thermally conductive insulating powder, and the terminal portion is taken out from the base end of the sealed pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4079887A JPS63207083A (en) | 1987-02-24 | 1987-02-24 | Cartridge heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4079887A JPS63207083A (en) | 1987-02-24 | 1987-02-24 | Cartridge heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63207083A true JPS63207083A (en) | 1988-08-26 |
Family
ID=12590643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4079887A Pending JPS63207083A (en) | 1987-02-24 | 1987-02-24 | Cartridge heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63207083A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935930A (en) * | 1972-08-10 | 1974-04-03 | ||
| JPS5445848A (en) * | 1977-09-16 | 1979-04-11 | Toshiba Corp | Sheath heater |
| JPS5756198A (en) * | 1980-09-19 | 1982-04-03 | Mitsubishi Electric Corp | Manufacture of composite metallic strip, and its device |
-
1987
- 1987-02-24 JP JP4079887A patent/JPS63207083A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935930A (en) * | 1972-08-10 | 1974-04-03 | ||
| JPS5445848A (en) * | 1977-09-16 | 1979-04-11 | Toshiba Corp | Sheath heater |
| JPS5756198A (en) * | 1980-09-19 | 1982-04-03 | Mitsubishi Electric Corp | Manufacture of composite metallic strip, and its device |
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