JPH03167777A - Induction heating coil - Google Patents
Induction heating coilInfo
- Publication number
- JPH03167777A JPH03167777A JP30464189A JP30464189A JPH03167777A JP H03167777 A JPH03167777 A JP H03167777A JP 30464189 A JP30464189 A JP 30464189A JP 30464189 A JP30464189 A JP 30464189A JP H03167777 A JPH03167777 A JP H03167777A
- Authority
- JP
- Japan
- Prior art keywords
- induction heating
- heated
- coil
- magnetic field
- heating coil
- 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
Landscapes
- General Induction Heating (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は誘導加熱コイル、詳しくは被加熱物を部分的
に加熱することができる誘導加熱コイルに関するものて
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an induction heating coil, and more particularly to an induction heating coil that can partially heat an object to be heated.
（従来の技術）
誘導加熱において、被加熱物を部分的に加熱し、ある部
分には熱を加えたくない状況も被加熱物の種類によって
は存在しており、従来においては、第２図に示す様に被
加熱物ｌに加熱したくない部分２がある場合、その近傍
のみ誘導加熱用加熱コイル３′のピッチを開けるか、あ
るいは複数のコイルを加熱したくない部分のみ空けて直
列接続して対処していた。(Prior art) In induction heating, there are situations in which the object to be heated is partially heated and heat is not applied to certain parts depending on the type of object to be heated. As shown in the figure, if there is a part 2 in the object to be heated that you do not want to heat, either open the pitch of the heating coil 3' for induction heating only in the vicinity thereof, or connect multiple coils in series with only the part you do not want to heat. I was dealing with it.
（発明か解決しようとする課題）
しかしながら、上記の通りの方法ては加熱したくない部
分にも周囲のコイルから磁束が届く為、ある程度の加熱
は避けられなかった。又、被加熱物か複数種類あり、加
熱したくなる部分がそれぞれ異る場合にはそれぞれに応
じた誘導加熱用コイルを用意する必要があり、大変面倒
であった。(Problem to be Solved by the Invention) However, in the method described above, the magnetic flux from the surrounding coils reaches even parts that are not desired to be heated, so that some heating is unavoidable. Furthermore, if there are multiple types of objects to be heated and the parts to be heated are different, it is necessary to prepare induction heating coils for each type, which is very troublesome.
この発明は、被加熱物の誘導加熱に関する上記従来の問
題点を解決することを目的とするものであり、被加熱物
中の加熱したくない部分にはほとんど磁束が届かず、加
熱されず、加熱したくない部分がそれぞれ異る複数の被
加熱物にも簡単に対処できる新規な誘導加熱コイルを提
供せんとするものである。The purpose of this invention is to solve the above-mentioned conventional problems regarding induction heating of objects to be heated. It is an object of the present invention to provide a novel induction heating coil that can easily handle a plurality of objects to be heated, each of which has a different portion that it does not want to heat.
（課題を解決する為の手段）
この発明は、らせん状に回巻した誘導用加熱コイルの外
周又は内側にこれより長さの短いらせん状に回巻した磁
界打ち消し用コイルを長手方向にスライド可能に位置せ
しめ、前記両コイルの磁界がそれぞれ打ち消し合う方向
に電流が流れる様に両コイルを直列に接続して誘導加熱
コイルを構或することにより、上記課題を解決せんとす
るものてある。(Means for Solving the Problems) This invention allows a magnetic field canceling coil wound in a spiral shape with a shorter length to be slid in the longitudinal direction on the outer periphery or inside of an induction heating coil wound in a spiral shape. The above problem is solved by constructing an induction heating coil by connecting both coils in series so that current flows in a direction in which the magnetic fields of the two coils cancel each other out.
（作 用）
誘導加熱コイルの内側に被加熱物を位置せしめ、この誘
導加熱コイルに高周波電流を流して高周波磁界を発生さ
せて電磁誘導により導体てある被加熱物内に電界を誘起
させ、渦電流を発生させ、オーム損により被加熱物を自
己発熱させるものであるか、被加熱物のうち、磁界打ち
消し用コイルに囲まれている部分には渦電流が流れない
為発熱はおこらない。従って、磁界打ち消し用コイルを
被加熱物の加熱したくない部分近傍にスライドさせるた
けて被加熱物の部分的な加熱を行なうことができる。(Function) An object to be heated is placed inside an induction heating coil, a high frequency current is passed through the induction heating coil to generate a high frequency magnetic field, and an electric field is induced in the object to be heated which is a conductor by electromagnetic induction. Either a current is generated and the object to be heated is caused to self-heat due to ohmic loss, or heat generation does not occur because eddy current does not flow in the part of the object surrounded by the magnetic field canceling coil. Therefore, the object to be heated can be partially heated by sliding the magnetic field canceling coil near the portion of the object to be heated that is not desired to be heated.
（実 施 例）
第１図はこの発明に係る誘導加熱コイルの−・実施例の
断面図てある。(Embodiment) FIG. 1 is a sectional view of an embodiment of an induction heating coil according to the present invention.
図中３は同一ピッチてらせん状に回巻された誘導加熱用
コイル、４はらせん状に回巻された磁界打ち消し用コイ
ルてあり、誘導加熱コイル３の外周にスライド可能に位
置せしめられている。そして、前記誘導加熱用コイル３
と磁界打ち消し用コイル４とは、両コイルに発生する磁
界か互いに打ち消し合う方向になる様に電流か流れる様
に直列に接続されている。図中ｌは導体てある被加熱物
てある。又、第１図中「・」は図面上向う側から手前に
向って電流が流れていることを示し、ｒｘＪはその反対
を示す。In the figure, 3 is an induction heating coil wound spirally at the same pitch, and 4 is a magnetic field canceling coil wound spirally, which is slidably positioned on the outer periphery of the induction heating coil 3. . And the induction heating coil 3
and the magnetic field canceling coil 4 are connected in series so that current flows in a direction such that the magnetic fields generated in both coils cancel each other out. In the figure, l represents the object to be heated, which is a conductor. Further, in FIG. 1, "." indicates that the current flows from the top side to the front side of the drawing, and rxJ indicates the opposite.
なお、この実施例においては磁界打ち消し用コイル４は
誘導加熱用コイル３の外側に設けられているか、その外
径を誘導加熱用コイル３の内径より小さくし、誘導加熱
用コイル３の内側に設ける様にしても良い。In this embodiment, the magnetic field canceling coil 4 is provided on the outside of the induction heating coil 3, or the outer diameter thereof is smaller than the inner diameter of the induction heating coil 3, and the magnetic field canceling coil 4 is provided on the inside of the induction heating coil 3. You can also do it like this.
次に、この誘導加熱コイルの動作を説明する。Next, the operation of this induction heating coil will be explained.
誘導加熱用コイル３に高周波電流を流して高周波磁界を
発生させ、被加熱物１内に電界を誘起させ渦電流により
自己発熱させる際、磁界打ち消し用コイル４の位置して
いる部分では誘導加熱用コイル３の磁束はほとんど打ち
消される為、これに対応する被加熱物１の加熱したくな
い部分には自己発熱はおこらない。従って、この磁界打
ち消し用コイル４を被加熱物の加熱したくない部分２の
近傍に位置させることにより、加熱を防止することかで
きる。When a high-frequency current is passed through the induction heating coil 3 to generate a high-frequency magnetic field, and an electric field is induced in the object to be heated 1 to generate self-heating due to eddy current, the part where the magnetic field canceling coil 4 is located is used for induction heating. Since the magnetic flux of the coil 3 is almost canceled out, self-heating does not occur in the corresponding part of the heated object 1 that is not desired to be heated. Therefore, heating can be prevented by positioning this magnetic field canceling coil 4 near the portion 2 of the object to be heated that is not desired to be heated.
（発明の効果）
この発明は、上記の通りの構威を有するものであり、被
加熱物の部分加熱を簡単に行うことができ、加熱したく
ない部分がそれぞれ異る複数の被加熱物にも極めて簡単
に対応できるすぐれた効果を有するものてある。(Effects of the Invention) This invention has the structure described above, and can easily perform partial heating of a heated object, and can be applied to a plurality of heated objects, each of which has a different portion that is not desired to be heated. There are also some that have excellent effects and are extremely easy to deal with.
第１図はこの発明の一実施例の断面図、第２図は従来例
の断面図てある。
１ 被加熱物
３ 誘導加熱用コイル
４
磁界打ち消し用コイルFIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. 1 Object to be heated 3 Induction heating coil 4 Magnetic field cancellation coil
Claims (1)
これより長さの短いらせん状に回巻した磁界打ち消し用
コイルを長手方向にスライド可能に位置せしめ、前記両
コイルの磁界がそれぞれ打ち消し合う方向に電流が流れ
る様に直列に接続したことを特徴とする誘導加熱コイルA spirally wound magnetic field canceling coil having a shorter length is positioned so as to be slidable in the longitudinal direction on the outer periphery or inside of the spirally wound induction heating coil, and the magnetic fields of both coils cancel each other out. Induction heating coils characterized by being connected in series so that current flows in one direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30464189A JPH03167777A (en) | 1989-11-27 | 1989-11-27 | Induction heating coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30464189A JPH03167777A (en) | 1989-11-27 | 1989-11-27 | Induction heating coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03167777A true JPH03167777A (en) | 1991-07-19 |
Family
ID=17935481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30464189A Pending JPH03167777A (en) | 1989-11-27 | 1989-11-27 | Induction heating coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03167777A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6495811B2 (en) * | 2000-12-11 | 2002-12-17 | Agfa-Gevaert Ag | Induction heating device and method, and processor |
| CN102833900A (en) * | 2012-09-24 | 2012-12-19 | 万宇 | Double-helix heating coil panel |
-
1989
- 1989-11-27 JP JP30464189A patent/JPH03167777A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6495811B2 (en) * | 2000-12-11 | 2002-12-17 | Agfa-Gevaert Ag | Induction heating device and method, and processor |
| CN102833900A (en) * | 2012-09-24 | 2012-12-19 | 万宇 | Double-helix heating coil panel |
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