JPS6037598B2 - Sea heater - Google Patents
Sea heaterInfo
- Publication number
- JPS6037598B2 JPS6037598B2 JP9949181A JP9949181A JPS6037598B2 JP S6037598 B2 JPS6037598 B2 JP S6037598B2 JP 9949181 A JP9949181 A JP 9949181A JP 9949181 A JP9949181 A JP 9949181A JP S6037598 B2 JPS6037598 B2 JP S6037598B2
- Authority
- JP
- Japan
- Prior art keywords
- nitrate
- sheathed heater
- added
- insulation resistance
- heater
- 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
Links
- 229910002651 NO3 Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 9
- -1 nitrate compound Chemical class 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 1
- 150000001342 alkaline earth metals Chemical class 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
【発明の詳細な説明】
本発明は、長寿命で高熱時絶縁抵抗、高絶縁耐圧を有し
、かつ熱時絶縁抵抗および絶縁耐圧の経時変化の少ない
高品質のシーズヒータを提供するものである。[Detailed Description of the Invention] The present invention provides a high-quality sheathed heater that has a long life, high insulation resistance at high temperatures, high dielectric strength voltage, and little change over time in insulation resistance and dielectric strength voltage at high temperatures. .
一般に、シーズヒータの絶縁充填材としてマグネシアが
用いられている。Magnesia is generally used as an insulating filler for sheathed heaters.
このマグネシアは吸湿して絶縁低抗が低くなるため、ほ
とんどのシーズヒー外よ、両端閉口部をガラスあるいは
樹脂で封□し、水分の侵入を防ぐことにより、吸湿によ
る絶縁抵抗の低下を防いでいる。しかし、このように気
密に封口をすることにより、湿気の流入は無くなるが、
同時に空気の流入も無くなることになる。そのため、中
、高温用シーズヒータでは電熱線がシーズヒータ内部の
空気を消費し、酸化膜あるし・は窒化膜を生成するため
、シーズヒータ内部の空気がなくなり、熱時絶縁抵抗、
絶縁耐圧および寿命が劣化する。本発明は、上記のよう
に気密に封□したシーズヒータの欠点を解消するもので
、絶縁充填材層に硝酸塩化合物を添加することを特徴と
する。This magnesia absorbs moisture and its insulation resistance decreases, so in most cases, both closed ends are sealed with glass or resin to prevent moisture from entering, thereby preventing the insulation resistance from decreasing due to moisture absorption. . However, by sealing the door airtight like this, the inflow of moisture is eliminated, but
At the same time, there will be no inflow of air. Therefore, in a sheathed heater for medium and high temperatures, the heating wire consumes the air inside the sheathed heater and forms an oxide film or nitride film, so the air inside the sheathed heater disappears and the insulation resistance during heating increases.
Dielectric strength and life deteriorate. The present invention solves the drawbacks of the hermetically sealed sheathed heater as described above, and is characterized by adding a nitrate compound to the insulating filler layer.
ここで、前記の硝酸塩としては、ナトリウム、カリウム
などのアルカリ金属、マグネシウム、カルシウムなどの
アルカリ士類金属、ニッケル、鉄などの遷移金属の硝酸
塩が用いられる。以下、本発明を実施例により説明する
。Here, as the nitrate, nitrates of alkali metals such as sodium and potassium, alkali metals such as magnesium and calcium, and transition metals such as nickel and iron are used. The present invention will be explained below using examples.
第１図はシーズヒータの構成例を示すもので、１は金属
パイプ、２はコイル状の電熱線、３は電熱線に接続した
ターミナル、４はマグネシアからなる絶縁充填材、５は
ガラス封□層である。Figure 1 shows an example of the configuration of a sheathed heater. 1 is a metal pipe, 2 is a coiled heating wire, 3 is a terminal connected to the heating wire, 4 is an insulating filler made of magnesia, and 5 is a glass seal. It is a layer.
本発明では、充填材の層４へ硝酸塩を添加するものであ
る。このシーズヒータはガラス封□をしているため、封
□部より空気の流入がない。In the present invention, nitrate is added to the layer 4 of filler material. Since this sheathed heater has a glass seal □, air does not flow in from the seal □.
そのため、ヒータ通電時には、従来例と同様、電熱線の
高温酸化が起こる。しかし同時にシーズヒータ内部は高
温になるため、硝酸塩は分解し、Ｎ０３やＮ０２ガスを
発生する。これらのガスは高温のヒータ線と反応し、酸
化膜および窒化膜を生成する働をする。従ってシーズヒ
ータ内部には多くの空気を導入したのと同じことになる
。そのため、従来例に示したような熱時絶縁抵抗、絶縁
耐圧の低下が起こらず、長期の使用に耐えられる。また
、この場合、硝酸塩分簾後の生成物は、マグネシアなど
の金属酸化物であり、分解生成物による悪影響もない。
第２図は、絶縁充填材に対して硝酸マグネシウムを各種
の割合で添加したシーズヒータについて、ターミナル間
にＡＣＩＯＯＶを印加したときのパイプと電熱線間の絶
縁抵抗の経時変化を比較した結果を示す。硝酸塩を加え
る量が増すにつれ、熱時絶縁抵抗の劣化する時間が増加
する。Therefore, when the heater is energized, high-temperature oxidation of the heating wire occurs as in the conventional example. However, at the same time, the inside of the sheathed heater becomes high temperature, so the nitrate decomposes and generates N03 and N02 gas. These gases react with the high temperature heater wire and serve to form oxide and nitride films. Therefore, this is equivalent to introducing a large amount of air into the sheathed heater. Therefore, the insulation resistance and dielectric strength voltage do not decrease when heated as shown in the conventional example, and it can withstand long-term use. Further, in this case, the product after nitrate separation is a metal oxide such as magnesia, and there is no adverse effect due to decomposition products.
Figure 2 shows the results of comparing the change in insulation resistance between the pipe and the heating wire over time when ACIOOV is applied between the terminals for sheathed heaters in which magnesium nitrate is added to the insulating filler in various proportions. . As the amount of nitrate added increases, the time for thermal insulation resistance to degrade increases.
この効果は、０．０１重量％程度から明確に表れてくる
。しかし、添加量が増すにつれて、初期の絶縁抵抗は劣
化し、５重量％以上を添加した場合、初期にＩＭＯ以下
になり良いシーズヒータを得ることができない。また、
他の金属硝酸塩を加えた場合もほぼ同様の効果を示した
。次に、絶縁充填材に硝酸マグネシウムを０．５重量％
添加した本発明のシーズヒータＡと、硝酸塩を添加しな
い従来のヒータＢについて、各種の特性を比較した結果
を示す。This effect clearly appears from about 0.01% by weight. However, as the amount added increases, the initial insulation resistance deteriorates, and when more than 5% by weight is added, the initial IMO becomes less than IMO, making it impossible to obtain a good sheathed heater. Also,
Almost the same effect was obtained when other metal nitrates were added. Next, add 0.5% by weight of magnesium nitrate to the insulating filler.
The results of comparing various characteristics of the sheathed heater A of the present invention in which nitrate is added and the conventional heater B in which nitrate is not added are shown.
第３図はターミナル間にＡＣＩＯＯＶを印加したときの
パイプと電熱線間の絶縁抵抗の経時変化を示し、第４図
は同条件下で通電後のパイプと電熱線間の絶縁耐圧の変
化を示す。Figure 3 shows the change over time in the insulation resistance between the pipe and the heating wire when ACIOOV is applied between the terminals, and Figure 4 shows the change in the insulation resistance between the pipe and the heating wire after energization under the same conditions. .
また、第５図は同条件下で通電したときの断線に至るま
での寿命を示す。以上のように、本発明によれば熱時絶
縁抵抗、絶縁耐圧の鰹時変化が少なく、長寿命のシーズ
ヒータが得られる。Moreover, FIG. 5 shows the lifespan until disconnection when electricity is applied under the same conditions. As described above, according to the present invention, it is possible to obtain a sheathed heater with a long life and little change in insulation resistance and withstand voltage during heating.
第１図は実施例のシーズヒータの要部を示す断面図、第
２図は充填材に各種の割合で硝酸塩を添加した場合の熱
時絶縁抵抗の経時変化を示す図、第３〜５図は従来例と
の各種の特性を比較した図である。
１・・・・・・パイプ、２・・・・・・電熱線、３・・
・・・・ターミナル、４・・・・・・絶縁充填材、５・
・・・・・封口層。
第１図第２図
第３図
第４図
第５図Figure 1 is a sectional view showing the main parts of the sheathed heater of the example, Figure 2 is a diagram showing changes over time in insulation resistance when heated when nitrate is added to the filler in various proportions, and Figures 3 to 5. is a diagram comparing various characteristics with a conventional example. 1...pipe, 2...heating wire, 3...
...Terminal, 4...Insulating filler, 5.
...Sealing layer. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
Claims (1)
化合物を添加したこととを特徴とするシーズヒータ。 ２ 硝酸塩化合物が、アルカリ金属、アルカリ土類金属
または遷移金属の硝酸塩であり、充填材に対する添加割
合が０．０１〜５重量％である特許請求の範囲第１項記
載のシーズヒータ。[Claims] 1. A sheathed heater characterized in that a nitrate compound is added to a filler layer that insulates a metal pipe and a heating wire. 2. The sheathed heater according to claim 1, wherein the nitrate compound is a nitrate of an alkali metal, an alkaline earth metal, or a transition metal, and is added in an amount of 0.01 to 5% by weight relative to the filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9949181A JPS6037598B2 (en) | 1981-06-25 | 1981-06-25 | Sea heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9949181A JPS6037598B2 (en) | 1981-06-25 | 1981-06-25 | Sea heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS581992A JPS581992A (en) | 1983-01-07 |
| JPS6037598B2 true JPS6037598B2 (en) | 1985-08-27 |
Family
ID=14248767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9949181A Expired JPS6037598B2 (en) | 1981-06-25 | 1981-06-25 | Sea heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6037598B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0612693B2 (en) * | 1987-11-06 | 1994-02-16 | 日本特殊陶業株式会社 | Ceramic heater and method of manufacturing the same |
| JP2537380B2 (en) * | 1988-02-18 | 1996-09-25 | 本田技研工業株式会社 | Automotive body painting method and painting equipment |
-
1981
- 1981-06-25 JP JP9949181A patent/JPS6037598B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS581992A (en) | 1983-01-07 |
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