JPH0751754Y2 - Constant temperature heating element - Google Patents
Constant temperature heating elementInfo
- Publication number
- JPH0751754Y2 JPH0751754Y2 JP1987006209U JP620987U JPH0751754Y2 JP H0751754 Y2 JPH0751754 Y2 JP H0751754Y2 JP 1987006209 U JP1987006209 U JP 1987006209U JP 620987 U JP620987 U JP 620987U JP H0751754 Y2 JPH0751754 Y2 JP H0751754Y2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- metal
- heating element
- lead wire
- ceramic plate
- 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
【考案の詳細な説明】 産業上の利用分野 本考案は、凍結防止用としてパイプ等に取付けられるヒ
ータとしての定温発熱体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a constant temperature heating element as a heater attached to a pipe or the like to prevent freezing.
従来の技術 従来のこの種の定温発熱体は、第２図a,b、第３図a,bの
ような構造になっていた。すなわち、第２図において、
円柱状金属ケース１に裸の発熱素子（抵抗素子）２が、
無機絶縁物３を介して埋込まれている。又、第３図にお
いて、セラミックケース４に裸の発熱素子５が、無機系
セメント６で封入されている。2. Description of the Related Art The conventional constant temperature heating element of this type has a structure as shown in FIGS. 2a, 2b and 3a, b. That is, in FIG.
A bare heating element (resistive element) 2 is attached to a cylindrical metal case 1.
It is embedded through the inorganic insulator 3. Further, in FIG. 3, a bare heating element 5 is enclosed in a ceramic case 4 with an inorganic cement 6.
考案が解決しようとする問題点 しかし、このような構造のものでは、発熱素子２又は５
がいずれも裸素子であり、円柱状金属ケース１に無機絶
縁物３で封止してある場合は、無機絶縁物３は自然吸湿
している場合、発熱素子２が通電し高温になると無機絶
縁物３中の水分が活性化し、発熱素子２と円柱状金属ケ
ース１間で絶縁劣化を発生することがある。又、セラミ
ックケース４に無機系セメント６で封入されている場合
も、無機系セメント６のマイクロクラックやピンホール
などが発生しやすく絶縁性が完全とはいえない状態であ
る。さらに、円柱状金属ケース１の場合、パイプ取付け
に当っては、円柱状のものどうしの取付けのため、パイ
プ側に取付台を溶接等で接合し、その取付台に定温発熱
体を取付けなければならなかった。又セラミックケース
４の場合、セラミックは熱伝導性が悪いため、ヒータと
して形状は大きくならざるを得ないという欠点があっ
た。However, in the case of such a structure, the heating element 2 or 5
Are both bare elements, and when the cylindrical metal case 1 is sealed with the inorganic insulator 3, when the inorganic insulator 3 is naturally absorbing moisture, when the heating element 2 is energized and the temperature becomes high, the inorganic insulation Moisture in the object 3 may be activated to cause insulation deterioration between the heating element 2 and the cylindrical metal case 1. In addition, even when the ceramic case 4 is filled with the inorganic cement 6, microcracks and pinholes are easily generated in the inorganic cement 6 and the insulating property is not perfect. Further, in the case of the cylindrical metal case 1, when mounting the pipes, since the cylindrical ones are mounted on each other, the mounting base should be joined to the pipe side by welding or the like, and the constant temperature heating element should be mounted on the mounting base. did not become. Further, in the case of the ceramic case 4, since ceramic has poor heat conductivity, there is a drawback that the shape of the heater must be large.
問題点を解決するための手段 両端部にリード線が接続されたシリコーン系絶縁塗料で
全面塗装した抵抗素子を、内側に凹状の曲面を１ヶ所有
し、リード線引出し部の両端面が開口部になっている筒
状の金属筒に入れ、上記抵抗素子と上記金属筒の空間部
に無機質絶縁物を入れ、さらに、金属筒の両端部端面よ
り内側にセラミック板を装着し、上記抵抗素子の上記リ
ード線を外側に突出させる穴を有する上記金属筒より突
出する管を上記セラミック板の片面に設け、このセラミ
ックの片面と上記金属筒の端面間を樹脂系絶縁封止物で
封止するとともに、少なくとも突出した上記管とリード
線の一部を熱収縮チューブで被覆したものである。Means for solving the problem A resistor element with lead wires connected to both ends coated on the entire surface with a silicone-based insulating paint has one concave curved surface inside, and both ends of the lead wire lead-out portion are open. In a tubular metal tube, and put an inorganic insulator in the space between the resistance element and the metal tube.Furthermore, a ceramic plate is attached to the inside of both end portions of the metal tube, and the resistance element A tube projecting from the metal cylinder having a hole for projecting the lead wire to the outside is provided on one surface of the ceramic plate, and one surface of the ceramic and the end surface of the metal cylinder are sealed with a resin-based insulating sealant. The heat-shrinkable tube covers at least part of the protruding tube and the lead wire.
作用 この技術的手段による作用は次のようになる。発熱素子
がシリコーン系塗料で塗装されているので、無機絶縁物
と発熱素子の抵抗部が直接接することなく塗料で隔絶さ
れているので、無機絶縁物が吸湿していても絶縁劣化の
発生が防止できる。又開口部は、金属筒の両端面だけで
あり、しかもこの部分を樹脂系絶縁物で封止してあるの
で、外部からの吸湿も完全に防げる。また、金属筒の１
ヶ所が内側に凹状の曲面を有しているので、パイプにそ
の曲面を当接して座り良く取付けることができる。又、
金属筒は熱伝導性が良いため、セラミックケースに比べ
て、小形化することができる。又、金属筒の両端部内に
設けたセラミック板は、このセラミック板の穴にリード
線を通すことにより、発熱素子と金属筒の位置関係を固
定することができる。また、熱収縮チューブにより、さ
らに耐吸湿性を向上させるとともに、セラミックの片面
に設けた管によって、この熱収縮チューブの保持および
密着を安定的に行うことができる。Action The action of this technical means is as follows. Since the heating element is coated with silicone-based paint, the inorganic insulation and the resistance part of the heating element are isolated from each other without direct contact, so insulation deterioration is prevented even if the inorganic insulation absorbs moisture. it can. Further, since the openings are only on both end surfaces of the metal cylinder and these portions are sealed with the resin-based insulator, it is possible to completely prevent moisture absorption from the outside. Also, 1 of the metal cylinder
Since the location has a concave curved surface on the inside, the curved surface can be abutted on the pipe and can be mounted comfortably. or,
Since the metal cylinder has good thermal conductivity, it can be made smaller than the ceramic case. Further, the ceramic plates provided in both ends of the metal cylinder can fix the positional relationship between the heating element and the metal cylinder by passing the lead wires through the holes of the ceramic plate. Further, the heat-shrinkable tube can further improve the moisture absorption resistance, and the tube provided on one side of the ceramic can stably hold and adhere the heat-shrinkable tube.
実施例 以下、本考案の一実施例を添付図面に基づいて説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図a,bにおいて、巻芯７に抵抗線８が巻線されキャ
ップ９に接続されて構成された抵抗素子は、シリコーン
系絶縁塗料11で素子全体が塗装されている。この抵抗素
子が、硅石粒などの無機絶縁物12を介して、銅などの金
属筒13に挿入されている。抵抗素子のキャップ９に接続
されているリード線10は、金属筒13の内部に配置された
セラミック板14の穴を通して外部に導かれている。この
リード線10は、セラミック板14の片面に形成された管の
金属筒13より外側への突出部と共に、熱収縮チューブ16
で被覆保護されている。又、金属筒13内のセラミック板
14の面より、金属筒13の端面の間は、エポキシ樹脂など
の樹脂系絶縁物15で封止されている。また、第１図ｂに
示すように金属筒13は、13′のように内側に凹状の加工
がされている。1 (a) and 1 (b), a resistance element constituted by winding a resistance wire 8 around a winding core 7 and connecting it to a cap 9 is entirely coated with a silicone-based insulating paint 11. This resistance element is inserted into a metal cylinder 13 such as copper via an inorganic insulator 12 such as silica stone. The lead wire 10 connected to the cap 9 of the resistance element is guided to the outside through the hole of the ceramic plate 14 arranged inside the metal cylinder 13. The lead wire 10 is provided with a heat-shrinkable tube 16 together with a protruding portion of the tube formed on one surface of the ceramic plate 14 to the outside of the metal tube 13.
It is covered and protected by. Also, the ceramic plate in the metal cylinder 13
A space between the end faces of the metal tube 13 from the surface 14 is sealed with a resin-based insulator 15 such as an epoxy resin. Further, as shown in FIG. 1b, the metal cylinder 13 is processed into a concave shape like 13 '.
この構成により、万一無機絶縁物15が吸湿しても、抵抗
線８やキャップ９などの導電部は、シリコーン系絶縁塗
料11で塗装されているため、水分との接触は完成に隔絶
されるので、絶縁劣化が発生しない。又、端面は樹脂系
絶縁物15や熱収縮チューブ16で覆われているので外部か
らの水分の浸透は防止される。又、セラミック板14を金
属筒13内に挿入することで、抵抗素子の位置が常に固定
することができる。又、セラミック板14の一部を金属筒
13の外部へ出すことにより、熱収縮チューブ16の収縮前
の固定が確実にでき、さらに収縮後もこのセラミック板
14で確実に固定される。With this configuration, even if the inorganic insulator 15 absorbs moisture, the conductive parts such as the resistance wire 8 and the cap 9 are coated with the silicone-based insulating paint 11, so that contact with moisture is isolated to completion. Therefore, insulation deterioration does not occur. Further, since the end surface is covered with the resin-based insulator 15 and the heat-shrinkable tube 16, the permeation of moisture from the outside is prevented. Also, by inserting the ceramic plate 14 into the metal cylinder 13, the position of the resistance element can be fixed at all times. In addition, a part of the ceramic plate 14 is a metal tube.
By exposing the heat shrink tube 16 to the outside, the heat shrink tube 16 can be securely fixed before shrinking, and even after shrinking, the ceramic plate
Securely fixed at 14.
考案の効果 以上のように、本考案は抵抗素子にシリコーン系の絶縁
塗料で塗装を施したものを、さらに絶縁物中に埋没させ
た構造のため、絶縁性に優れている。又、金属筒を使用
しているので、熱伝導性が良く、さらに、金属筒の１ヶ
所をパイプの外径に沿うように金属筒の内側に凹状の加
工がされているため、安定した取付けができるばかりで
なく、パイプに熱が伝わる効率が良いので、少ない電力
で高い熱交換効果が得られる。従って、従来品に比べ
て、小形化、省エネルギーが達成される。又、セラミッ
ク板の穴にリード線を通すことにより、抵抗素子の位置
が安定して設置されると共に金属筒の内部にセラミック
板が設置されることは、封止樹脂の入量の定量化が可能
である。又、セラミック板の一部を金属筒の外に突出す
ることにより、熱収縮チューブの保持及び収縮後の密着
安定性に効果がある。Effect of the Invention As described above, the present invention is excellent in insulation because it has a structure in which a resistance element coated with a silicone-based insulating paint is further embedded in an insulator. In addition, because it uses a metal tube, it has good thermal conductivity. In addition, a concave shape is formed inside the metal tube so that one point of the metal tube is along the outer diameter of the pipe. Not only can it be done, but the efficiency of heat transfer to the pipe is good, so a high heat exchange effect can be obtained with a small amount of electric power. Therefore, as compared with the conventional product, miniaturization and energy saving can be achieved. Also, by passing the lead wire through the hole of the ceramic plate, the position of the resistance element is stably installed and the ceramic plate is installed inside the metal tube, which makes it possible to quantify the amount of the sealing resin entered. It is possible. Further, by projecting a part of the ceramic plate to the outside of the metal cylinder, it is effective in holding the heat-shrinkable tube and in stability of adhesion after shrinkage.
第１図a,bは本考案の一実施例の定温発熱体の部分断面
図および右側面図、第２図a,bおよび第３図a,bは従来品
の部分断面図および右側面図である。 ７……巻芯、８……抵抗線、９……キャップ、10……リ
ード線、11……シリコーン系絶縁塗料、12……無機絶縁
物、13……金属筒、13′……金属筒の凹状部、14……セ
ラミック板、15……樹脂系絶縁物、16……熱収縮チュー
ブ。1A and 1B are a partial sectional view and a right side view of a constant temperature heating element according to an embodiment of the present invention, and FIGS. 2A and 2B are a partial sectional view and a right side view of a conventional product. Is. 7 ... winding core, 8 ... resistance wire, 9 ... cap, 10 ... lead wire, 11 ... silicone insulating paint, 12 ... inorganic insulating material, 13 ... metal cylinder, 13 '... metal cylinder Concave part, 14 …… ceramic plate, 15 …… resin insulation, 16 …… heat shrinkable tube.
Claims (1)
系絶縁塗料で全面塗装した抵抗素子を、内側に凹状の曲
面を１ヶ所有し、リード線引出し部の両端面が開口部に
なっている筒状の金属筒に入れ、上記抵抗素子と上記金
属筒の空間部に無機質絶縁物を入れ、さらに、金属筒の
両端部端面より内側にセラミック板を装着し、上記抵抗
素子の上記リード線を外側に突出させる穴を有する上記
金属筒より突出する管を上記セラミック板の片面に設
け、このセラミックの片面と上記金属筒の端面間を樹脂
系絶縁封止物で封止するとともに、少なくとも突出した
上記管とリード線の一部を熱収縮チューブで被覆した定
温発熱体。1. A resistance element having lead wires connected to both ends thereof, which is entirely coated with a silicone-based insulating paint, has one concave curved surface inside, and both end surfaces of the lead wire lead-out portion are openings. Put the metal insulator in a tubular metal tube, put an inorganic insulator in the space between the resistance element and the metal tube, and further mount a ceramic plate inside the end faces of both ends of the metal tube, and connect the lead wire of the resistance element. A tube projecting from the metal cylinder having a hole for projecting to the outside is provided on one surface of the ceramic plate, and a space between the one surface of the ceramic and the end surface of the metal cylinder is sealed with a resin-based insulating sealing material, and at least the projection is made. A constant temperature heating element in which the above-mentioned tube and a part of the lead wire are covered with a heat-shrinkable tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987006209U JPH0751754Y2 (en) | 1987-01-20 | 1987-01-20 | Constant temperature heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987006209U JPH0751754Y2 (en) | 1987-01-20 | 1987-01-20 | Constant temperature heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63116996U JPS63116996U (en) | 1988-07-28 |
| JPH0751754Y2 true JPH0751754Y2 (en) | 1995-11-22 |
Family
ID=30788511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987006209U Expired - Lifetime JPH0751754Y2 (en) | 1987-01-20 | 1987-01-20 | Constant temperature heating element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751754Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2578336Y2 (en) * | 1991-10-28 | 1998-08-13 | 京セラ株式会社 | Pipe heating equipment |
| JP2517811B2 (en) * | 1991-11-06 | 1996-07-24 | ミサワホーム株式会社 | Insulation pipe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417948U (en) * | 1977-07-08 | 1979-02-05 | ||
| JPS54125553A (en) * | 1978-03-22 | 1979-09-29 | Matsushita Electric Ind Co Ltd | Sheath heater |
| JPS6017798B2 (en) * | 1979-06-29 | 1985-05-07 | 信越化学工業株式会社 | organosilicon compounds |
| JPS60180087A (en) * | 1984-02-27 | 1985-09-13 | 株式会社河合電器製作所 | Method of sealing cartridge heater |
-
1987
- 1987-01-20 JP JP1987006209U patent/JPH0751754Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63116996U (en) | 1988-07-28 |
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