JP2012169174A - Heater tube - Google Patents
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- JP2012169174A JP2012169174A JP2011029925A JP2011029925A JP2012169174A JP 2012169174 A JP2012169174 A JP 2012169174A JP 2011029925 A JP2011029925 A JP 2011029925A JP 2011029925 A JP2011029925 A JP 2011029925A JP 2012169174 A JP2012169174 A JP 2012169174A
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- heating wire
- heater
- guide groove
- heater tube
- insulating tube
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Abstract
Description
本発明は、例えばジルコニア酸素濃度計におけるセンサ加熱用ヒータに関し、セラミックスや石英ガラスなど絶縁体にニクロム線などの電熱線を巻きつける構造のヒータに関する。 The present invention relates to a heater for sensor heating in, for example, a zirconia oximeter, and more particularly to a heater having a structure in which a heating wire such as a nichrome wire is wound around an insulator such as ceramic or quartz glass.
図２（ａ〜ｃ）は従来のジルコニア酸素濃度計のセンサ加熱用のヒータ概略図であり、図２（ａ）は正面図、図２（ｂ）は（ａ）図のＡ−Ａ断面図、図２（ｃ）は（ｂ）図のＢ部拡大図である。 2A to 2C are schematic views of a heater for heating a sensor of a conventional zirconia oximeter, FIG. 2A is a front view, and FIG. 2B is a cross-sectional view taken along line AA in FIG. FIG. 2 (c) is an enlarged view of part B of FIG. 2 (b).
図２においては、セラミックスや石英ガラスなど管状の絶縁体（以下、絶縁管という）１に、ニクロム線などの電熱線２を規定のピッチで規定回数巻きつけ、さらに、これに耐熱コーティング剤３を塗布したヒータとなっている。電熱線に電圧を印加すると電熱線２が発熱し、これに接触する絶縁管１も加熱され、ヒータとして機能する。 In FIG. 2, a heating wire 2 such as a nichrome wire is wound around a tubular insulator (hereinafter referred to as an insulating tube) 1 such as ceramics or quartz glass at a specified number of times, and a heat resistant coating agent 3 is further wound around the wire. It is a coated heater. When a voltage is applied to the heating wire, the heating wire 2 generates heat, and the insulating tube 1 in contact therewith is also heated to function as a heater.
このようなヒータとしては、絶縁管１に電熱線２を巻きつけたものが一般的であるが、電熱線を巻きつける際の作業性向上等を目的として、従来ヒータでは、絶縁管の電熱線と接触する表面に電熱線２のガイドとなるようなＶ溝４が形成されている。 As such a heater, one in which the heating wire 2 is wound around the insulating tube 1 is generally used. However, in order to improve workability when the heating wire is wound, the conventional heater has a heating wire in the insulating tube. A V-groove 4 is formed on the surface in contact with the heating wire 2 as a guide for the heating wire 2.
また、このガイドとしての機能は作業性向上以外にも効果がある。即ち、絶縁管１、電熱線２及び耐熱コーティング剤３との膨張係数差が非常に大きい場合には、ヒータの使用における熱膨張収縮の繰り返しにより、耐熱コーティング剤３が絶縁管１から剥離してしまうことがある。 The function as a guide is effective in addition to improving workability. That is, when the expansion coefficient difference between the insulating tube 1, the heating wire 2, and the heat resistant coating agent 3 is very large, the heat resistant coating agent 3 is peeled off from the insulating tube 1 due to repeated thermal expansion and contraction in use of the heater. May end up.
絶縁管１にＶ溝４がなく、コーティング剤３が剥離してしまった場合は、巻きつけた電熱線２の位置やピッチにズレが生じたりすることがあるが、絶縁管１にＶ溝４が施されていれば、コーティングがない状態でも、電熱線２がＶ溝４によって絶縁管１の軸方向に拘束されることから、位置やピッチにズレが生じたりすることはない。 If the insulating tube 1 does not have the V-groove 4 and the coating agent 3 is peeled off, the position or pitch of the wound heating wire 2 may be displaced. If the coating is applied, the heating wire 2 is restrained in the axial direction of the insulating tube 1 by the V-groove 4 even when there is no coating, so that the position and the pitch are not displaced.
ところで、ヒータ表面には、電熱線２の絶縁管１への固着及び電熱線表面からの熱の散逸を目的として耐熱コーティング剤３が塗布される。電熱線２の表面温度は寿命に大きく依存するパラメータであることから、コーティングは電熱線表面全てを覆い、熱伝導により表面から熱を散逸させることが望ましい。 By the way, a heat resistant coating agent 3 is applied to the heater surface for the purpose of fixing the heating wire 2 to the insulating tube 1 and dissipating heat from the heating wire surface. Since the surface temperature of the heating wire 2 is a parameter that greatly depends on the lifetime, it is desirable that the coating covers the entire heating wire surface and dissipates heat from the surface by heat conduction.
絶縁管と接触する部分については、絶縁管１及び電熱線２の表面状態により完全接触とはならず、接触熱抵抗としては大きくなってしまう。従って、絶縁管１との接触面を最小にし、コーティング剤３で覆われる面を最大とすることが必要である。 The portion in contact with the insulating tube is not completely contacted due to the surface state of the insulating tube 1 and the heating wire 2, and the contact thermal resistance is increased. Therefore, it is necessary to minimize the contact surface with the insulating tube 1 and maximize the surface covered with the coating agent 3.
従来のＶ溝形状や凹形の溝では、電熱線表面が部分的にコーティング剤３で覆われず、空間Ｋとして残ってしまう部分が生じる（図２ｃ参照）。このような箇所では電熱線の表面からは輻射及び熱伝達でのみの放熱となるため、コーティングにより熱伝導で熱を散逸させている部分と比較して表面温度が高くなる。 In the conventional V-groove shape or concave groove, a portion where the surface of the heating wire is not partially covered with the coating agent 3 and remains as the space K occurs (see FIG. 2c). In such a place, since the surface of the heating wire emits heat only by radiation and heat transfer, the surface temperature becomes higher than the portion where heat is dissipated by heat conduction by the coating.
頻繁なヒータ電源のＯＮ／ＯＦＦなど電熱線２への負荷が高い場合、電熱線２の表面温度が最も高いところから次第に溶け始め、断線に至ってしまう可能性が高くなる。コーティング剤３に覆われない部分をなくすために、絶縁管１に電熱線２を巻きつける前に、絶縁管１にコーティング剤３を塗布してしまう方法もあるが、作業上好ましくない。 When the load on the heating wire 2 is high, such as frequent ON / OFF of the heater power supply, the heating wire 2 gradually begins to melt from the highest surface temperature and is likely to be disconnected. In order to eliminate the portion not covered with the coating agent 3, there is a method of applying the coating agent 3 to the insulating tube 1 before the heating wire 2 is wound around the insulating tube 1.
従って本発明は、ヒータ巻き線作業時の作業性、使用時の安定性を従来並みに維持しつつ、従来以上の寿命をもたせることを目的としている。 Accordingly, it is an object of the present invention to provide a life longer than the conventional one while maintaining the workability at the time of the heater winding work and the stability at the time of use.
本発明は上記課題を解決するためになされたもので、請求項１のヒータ管においては、
外周に螺旋状に形成されたガイド溝を有する絶縁体と、前記ガイド溝に沿って巻きつけられた電熱線と、前記絶縁体と電熱線を覆って形成されるコーティング剤からなるヒータ管において、前記ガイド溝は前記電熱線の断面が前記ガイド溝に一点で接するように形成されたことを特徴とする。
The present invention has been made to solve the above problems, and in the heater tube of claim 1,
In a heater tube comprising an insulator having a guide groove formed in a spiral shape on the outer periphery, a heating wire wound along the guide groove, and a coating agent formed to cover the insulator and the heating wire, The guide groove is formed such that a cross section of the heating wire is in contact with the guide groove at one point.
請求項においては、請求項１に記載のヒータ管にいて、
前記ガイド溝の断面は半円状に形成され、前記電熱線の外径より大きく形成されたことを特徴とする。
In the claim, in the heater tube according to claim 1,
The guide groove has a semicircular cross section and is larger than the outer diameter of the heating wire.
以上説明したことから明らかなように本発明の請求項１、２によれば、
ヒータ巻き線作業時の作業性、使用時の安定性は従来並みでありながらも、電熱線の周囲に空間を作ることなく、コーティング剤を介しての電熱線の表面からの熱の散逸が従来品と比較して向上することから、特にヒータ電源の頻繁なＯＮ／ＯＦＦにおけるヒータ寿命が向上する。
As apparent from the above description, according to claims 1 and 2 of the present invention,
Workability during heater winding work and stability during use are the same as before, but heat dissipation from the surface of the heating wire via the coating agent has been achieved without creating a space around the heating wire. The heater life is improved especially when the heater power supply is frequently turned ON / OFF.
図１（ａ〜ｃ）は本発明のヒータ管の実施形態の一例を示すもので、例えばジルコニア酸素濃度計のセンサ加熱用として用いられる。（ａ）は正面図、（ｂ）は（ａ）図のＡ−Ａ断面図、（ｃ）は（ｂ）図のＢ部拡大図である。 FIGS. 1A to 1C show an example of an embodiment of a heater tube of the present invention, and are used for heating a sensor of a zirconia oxygen concentration meter, for example. (A) is a front view, (b) is an AA sectional view of (a) figure, (c) is the B section enlarged view of (b) figure.
基本構成は図２に示す従来ヒータと同様である。セラミックスや石英ガラスなど絶縁管１に、ニクロム線などの電熱線２を規定のピッチで規定回数巻きつけ、さらにこれに耐熱コーティング剤３を塗布したヒータとなっている。電熱線２に電圧を印加すると電熱線が発熱し、これに接触する絶縁管１も加熱され、ヒータとして機能する。 The basic configuration is the same as that of the conventional heater shown in FIG. A heater in which a heating wire 2 such as a nichrome wire is wound at a specified pitch around an insulating tube 1 such as ceramics or quartz glass, and a heat-resistant coating agent 3 is applied thereto. When a voltage is applied to the heating wire 2, the heating wire generates heat, and the insulating tube 1 in contact with the heating wire is also heated to function as a heater.
従来ヒータと異なる部分は、絶縁管１の電熱線２を巻きつける面に設けられた、断面が半円状の溝４ａである。この溝４ａは絶縁管１の溝４ａの底部の曲率半径を電熱線２の径より大きく取った形状となっており、溝４ａと電熱線２の断面は一点で接するように形成されている。 A portion different from the conventional heater is a groove 4a having a semicircular cross section provided on a surface around which the heating wire 2 of the insulating tube 1 is wound. The groove 4a has a shape in which the radius of curvature of the bottom of the groove 4a of the insulating tube 1 is larger than the diameter of the heating wire 2, and the cross section of the groove 4a and the heating wire 2 is formed at one point.
これによって絶縁管１と電熱線２の接触する部分を極力小さくし、電熱線表面のコーティング剤に覆われる部分を極力大きくすることができる（Ｂ部拡大図ｃ及びｃ’参照）。
その結果、従来ヒータで見られたような、絶縁管１と電熱線２の空間はなくなり、電熱線表面からは熱伝導によって熱を散逸することが可能になる。
As a result, the portion where the insulating tube 1 and the heating wire 2 are in contact with each other can be made as small as possible, and the portion covered with the coating agent on the surface of the heating wire can be made as large as possible (see the B part enlarged views c and c ′).
As a result, there is no space between the insulating tube 1 and the heating wire 2 as found in a conventional heater, and heat can be dissipated from the surface of the heating wire by heat conduction.
従来ヒータ同様に、絶縁管には電熱線を拘束する溝があることから、絶縁管への電熱線を巻きつける際の作業性もよく、またコーティングの剥離等が生じても、電熱線の位置やピッチにズレが生じたりすることはない。 Like conventional heaters, the insulation tube has a groove that restrains the heating wire, so that the workability when winding the heating wire around the insulation tube is good, and even if the coating is peeled off, the position of the heating wire is good. There will be no deviation in the pitch.
なお、以上の説明は、本発明の説明および例示を目的として特定の好適な実施例を示したに過ぎない。例えば、実施例ではジルコニア酸素計用ヒータとして説明したが、セラミックスや石英ガラスなど絶縁体にニクロム線などの電熱線を巻きつける構造のヒータ全般に適用可能である。
従って本発明は、上記実施例に限定されることなく、その本質から逸脱しない範囲で更に多くの変更、変形を含むものである。
The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention. For example, although the embodiment has been described as a heater for a zirconia oximeter, it can be applied to any heater having a structure in which a heating wire such as a nichrome wire is wound around an insulator such as ceramics or quartz glass.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.
１ 絶縁体（絶縁管）
２ 電熱線
３ 耐熱コーティング剤
４ Ｖ溝
Ｋ 空間
1 Insulator (insulating tube)
2 Heating wire 3 Heat-resistant coating agent 4 V groove K space
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| JP2011029925A JP5743188B2 (en) | 2011-02-15 | 2011-02-15 | Heater tube |
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| JP2011029925A JP5743188B2 (en) | 2011-02-15 | 2011-02-15 | Heater tube |
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| JP5743188B2 JP5743188B2 (en) | 2015-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016537822A (en) * | 2013-09-23 | 2016-12-01 | ククチェ エレクトリック コリア カンパニー リミテッド | Heater member and substrate processing apparatus having the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112345623B (en) * | 2020-12-30 | 2021-04-16 | 胜科纳米（苏州）有限公司 | Method for metal wire secondary mass spectrum deep analysis |
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| JPH06208885A (en) * | 1993-01-12 | 1994-07-26 | Ngk Insulators Ltd | Cylindrical far infrared heater and manufacture thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4812597Y1 (en) * | 1969-07-09 | 1973-04-05 | ||
| JPS492601Y1 (en) * | 1969-12-05 | 1974-01-22 | ||
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016537822A (en) * | 2013-09-23 | 2016-12-01 | ククチェ エレクトリック コリア カンパニー リミテッド | Heater member and substrate processing apparatus having the same |
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| JP5743188B2 (en) | 2015-07-01 |
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