JPH0650669B2 - Induction heating device for electromagnetic cooker - Google Patents
Induction heating device for electromagnetic cookerInfo
- Publication number
- JPH0650669B2 JPH0650669B2 JP63064612A JP6461288A JPH0650669B2 JP H0650669 B2 JPH0650669 B2 JP H0650669B2 JP 63064612 A JP63064612 A JP 63064612A JP 6461288 A JP6461288 A JP 6461288A JP H0650669 B2 JPH0650669 B2 JP H0650669B2
- Authority
- JP
- Japan
- Prior art keywords
- induction heating
- heating device
- iron core
- electromagnetic cooker
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
- H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
- H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
- H05B6/1254—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements using conductive pieces to direct the induced magnetic field
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/02—Induction heating
- H05B2206/022—Special supports for the induction coils
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は電磁誘導作用で加熱する業務用電磁調理器に
おいて、誘導加熱コイルのインピーダンスを調整可能に
して負荷電流を減らすとともに漏えい磁束によるノイズ
の発生を減らして電源制御回路の誤動作を防止すること
ができるようにした誘導加熱装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electromagnetic cooker for commercial use that heats by an electromagnetic induction action so that the impedance of the induction heating coil can be adjusted to reduce the load current and to reduce the noise caused by the leakage magnetic flux. The present invention relates to an induction heating device capable of reducing the occurrence and preventing a malfunction of a power supply control circuit.
業務用電磁調理器の誘導加熱装置の従来例を第５図にも
とづいて説明する。この図は誘導加熱コイル１に高周波
電流を流して交番磁束を発生させる電源制御回路を示
し、電源側と負荷側の間に回路のインピーダンスをマッ
チングさせるためのマッチングトランス２が設けられて
いる。電磁調理器の加熱原理は例えばステーキパン等の
被加熱金属３内に前記交番磁束による電磁誘導作用で渦
電流を発生させこの渦電流と金属３の固有抵抗によるジ
ュール熱で金属３を加熱するもので、高周波電流を使用
するのは交番磁束の表皮効果により渦電流の電流密度を
高めて金属３の吸収電力を増すためである。この高周波
電流は前記マッチングトランス２の一次電流の振動数を
ＨＦＣＴで検出し、この振動数と同期してオン、オフ動
作するトランジスタ素子Ｔr1，Ｔr2で制御して得られ
る。すなわち前記振動数は共振コンデンサＣとコイル１
のリアクタンスＬで決まり、トランジスタ素子Ｔr1がオ
ン動作すると電流ｉ1が実線矢印で示すように流れトラ
ンジスタ素子Ｔr2がオン動作すると電流ｉ2が点線矢印
で示すように流れる。一方マッチングトランス２は仮に
これを設けない場合には端子４における負荷側インピー
ダンスが電源側インピーダンスと相異して小さいので、
第６図のＡ１点とＡ２点またはＢ１点とＢ２点で示すよ
うに同一出力を出すのに所要負荷電流が増すのみでなく
電圧も一致しないのでこれを解消するために必要とな
る。A conventional example of an induction heating device for a commercial electromagnetic cooker will be described with reference to FIG. This figure shows a power supply control circuit for generating a high frequency current by passing a high frequency current through the induction heating coil 1, and a matching transformer 2 for matching the impedance of the circuit is provided between the power supply side and the load side. The principle of heating the electromagnetic cooker is to generate an eddy current in the metal 3 to be heated such as a steak pan by an electromagnetic induction action by the alternating magnetic flux, and heat the metal 3 by Joule heat due to the eddy current and the specific resistance of the metal 3. The reason why the high frequency current is used is to increase the current density of the eddy current by the skin effect of the alternating magnetic flux to increase the absorbed power of the metal 3. This high frequency current is obtained by detecting the frequency of the primary current of the matching transformer 2 by HFCT and controlling it by the transistor elements T r1 and T r2 which are turned on and off in synchronization with this frequency. That is, the frequency is the resonance capacitor C and the coil 1.
When the transistor element T r1 is turned on, a current i 1 flows as indicated by a solid arrow, and when the transistor element T r2 is turned on, a current i 2 flows as indicated by a dotted arrow. On the other hand, if the matching transformer 2 is not provided, the load side impedance at the terminal 4 is different from the power source side impedance, so
As shown by points A 1 and A 2 or points B 1 and B 2 in FIG. 6, not only the required load current increases but also the voltages do not match in order to output the same output, so it is necessary to eliminate this. Become.
前記構造ではマッチングトランス２の分だけ高価となる
のみでなく、コイル１の漏えい磁束により高周波ノイズ
が発生して電源制御回路を誤動作させることがあるとい
う欠点があった。In the above structure, not only the matching transformer 2 becomes expensive, but also the leakage magnetic flux of the coil 1 may cause high frequency noise to cause the power supply control circuit to malfunction.
この発明は前記の欠点を除去するめに、マッチングトラ
ンスを使用することなく誘導加熱コイルのインピーダン
スを調整可能にして負荷電流を減らすとともに、漏えい
磁束によるノイズの発生を減らして電源制御回路の誤動
作を防止することができるようにした電磁調理器の誘導
加熱装置を提供することを目的とする。In order to eliminate the above-mentioned drawbacks, the present invention can adjust the impedance of the induction heating coil without using a matching transformer to reduce the load current and reduce the generation of noise due to the leakage magnetic flux to prevent the malfunction of the power supply control circuit. It is an object of the present invention to provide an induction heating device for an electromagnetic cooker, which is made possible.
この発明は前記の目的を達成するために、渦巻き状に巻
装した誘導加熱コイルを透磁率の大きい鉄心を介して取
付け板上に載置した絶縁性を有する樹脂で一体的にモー
ルドした電磁調理器の誘導加熱装置において、前記鉄心
を複数の扇形状鉄心により円板状に形成し、前記鉄心と
前記取付け板との間に絶縁ライナを介在させたものであ
る。In order to achieve the above object, the present invention is an induction cooker in which an induction heating coil wound in a spiral shape is placed on a mounting plate via an iron core having a high magnetic permeability and integrally molded with an insulating resin. In an induction heating apparatus for a container, the iron core is formed into a disk shape by a plurality of fan-shaped iron cores, and an insulating liner is interposed between the iron core and the mounting plate.
前記鉄心１１はコイル１により発生した磁束をほとんど
漏えいさせることなく通すので有効磁束量を増してイン
ピーダンスを大きくし負荷電流を減らすのみでなく漏え
い磁束によるノイズの発生を減らして電源制御回路の誤
動作を防止することができ、さらに鉄心１１の扇形に分
割形成したものの個数を変えまた絶縁ライナ１２の厚さ
を変えることにより前記インピーダンスを適当に調整す
ることができるので従来例で説明したマッチングトラン
ス２を使用することなく電源側と負荷側のインピーダン
スをマッチングさせることができる。Since the iron core 11 passes the magnetic flux generated by the coil 1 with almost no leakage, the effective magnetic flux amount is increased to increase the impedance and reduce the load current, and the generation of noise due to the leakage magnetic flux is reduced to prevent malfunction of the power supply control circuit. In addition, the impedance can be properly adjusted by changing the number of fan-shaped parts of the iron core 11 and changing the thickness of the insulating liner 12. Therefore, the matching transformer 2 described in the conventional example can be used. The impedance on the power supply side and the impedance on the load side can be matched without using.
第１図ないし第２図はこの発明の実施例を示すもので、
第３図に示すように渦巻き状に巻装した誘導加熱コイル
１が透磁率の大きいフェライトコア等の円板状鉄心１１
に電気絶縁ライナ１２を介して載置され、これらは取付
け板１３上に載置して絶縁性を有する樹脂１４で一体的
にモールドされる。前記鉄心１１は第４図に示すように
適当な大きさの扇形に分割形成されている。第２図は前
記コイル１の電源制御回路を示し、コイル１を流れる電
流の振動数をＨＦＣＴで検出し、この振動数と同期して
トランジスタ素子Ｔr1とＴr2に交互にオン、オフ動作さ
せることにより高周波電流をコイル１に流してステーキ
パン等の被加熱金属３を誘導加熱するようになってい
る。1 and 2 show an embodiment of the present invention,
As shown in FIG. 3, a spirally wound induction heating coil 1 has a disk-shaped core 11 such as a ferrite core having a high magnetic permeability.
Are mounted on the mounting plate 13 via an electric insulating liner 12 and are integrally molded with a resin 14 having an insulating property. As shown in FIG. 4, the iron core 11 is divided and formed into a fan shape having an appropriate size. FIG. 2 shows a power supply control circuit for the coil 1. The frequency of the current flowing through the coil 1 is detected by HFCT, and the transistor elements T r1 and T r2 are alternately turned on and off in synchronization with this frequency. As a result, a high-frequency current is passed through the coil 1 to inductively heat the metal 3 to be heated such as a steak pan.
前記実施例によれば鉄心１１がコイル１により発生した
磁束をほとんど漏えいさせることなく通すので、有効磁
束量を増してコイル１のインピーダンスを大きくし負荷
電流を減らすのみでなく漏えい磁束による高周波ノイズ
の発生を減らして電源制御回路の誤動作ないし外部への
障害を防止することができる。また鉄心１１の扇形に分
割形成したものの個数および絶縁ライナ１２の厚さを変
えることにより前記インピーダンスを適当に調整するこ
とができるので従来例で説明したマッチングトランス２
を使用することなく電源側と負荷側のインピーダンスを
マッチングさせることができ、したがって被加熱金属３
の材質、形状に合わせてコイル１の巻回数、仕上がり外
径または発振周波数等を調整する作業が容易となる。According to the above-mentioned embodiment, the iron core 11 passes the magnetic flux generated by the coil 1 with almost no leakage, so that the effective magnetic flux amount is increased to increase the impedance of the coil 1 to reduce the load current, as well as the high frequency noise due to the leakage magnetic flux. It is possible to reduce the occurrence and prevent malfunction of the power supply control circuit or failure to the outside. Further, the impedance can be appropriately adjusted by changing the number of the iron cores 11 formed in a fan shape and the thickness of the insulating liner 12. Therefore, the matching transformer 2 described in the conventional example is used.
The impedance of the power source side and the impedance of the load side can be matched without using the
It becomes easy to adjust the number of windings of the coil 1, the finished outer diameter, the oscillation frequency, etc. according to the material and shape of the.
この発明によれば電磁調理器の誘導加熱装置において、
加熱コイルを扇形に分割形成した透磁率の大きい円板状
鉄心に絶縁ライナを介し載置してこれらを絶縁樹脂でモ
ールドするようにしたので、従来例で説明したマッチン
グトランスを使用することなくコイルのインピーダンス
を調整可能にして負荷電流を減らすとともに、漏えい磁
束によるノイズの発生を減らして電源制御回路の誤動作
を防止することができるという効果が得られる。According to the present invention, in the induction heating device of the electromagnetic cooker,
Since the heating coil is divided into fan-shaped parts and is mounted on a disk-shaped iron core with a large magnetic permeability via an insulating liner and these are molded with insulating resin, the coil can be coiled without using the matching transformer described in the conventional example. It is possible to obtain an effect that the impedance can be adjusted to reduce the load current, and the generation of noise due to the leakage magnetic flux can be reduced to prevent the malfunction of the power supply control circuit.
第１図はこの発明の実施例の縦断面図、第２図は第１図
の電源制御回路図、第３図は第１図および第２図のコイ
ルの平面図、第４図は第１図および第２図の鉄心の平面
図、第５図は従来例の電源制御回路図、第６図はコイル
の出力特性曲線を示す説明図である。 １……コイル、１１……鉄心、１２……絶縁ライナ、１
３……取付け板、１４……樹脂。1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a power supply control circuit diagram of FIG. 1, FIG. 3 is a plan view of the coil of FIGS. 1 and 2, and FIG. FIG. 5 is a plan view of the iron core of FIG. 2, FIG. 5 is a power supply control circuit diagram of a conventional example, and FIG. 6 is an explanatory diagram showing an output characteristic curve of a coil. 1 ... Coil, 11 ... Iron core, 12 ... Insulation liner, 1
3 ... Mounting plate, 14 ... Resin.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 霜上 義弘 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (56)参考文献 実開 昭60−131994（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Shimokami 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. (56) References
Claims (1)
率の大きい鉄心を介して取付け板上に載置して絶縁性を
有する樹脂で一体的にモールドした電磁調理器の誘導加
熱装置において、前記鉄心を複数の扇形状鉄心により円
板状に形成し、前記鉄心と前記取付け板との間に絶縁ラ
イナを介在させたことを特徴とする電磁調理器の誘導加
熱装置。1. An induction heating device for an electromagnetic cooker, wherein an induction heating coil wound in a spiral shape is placed on a mounting plate via an iron core having a high magnetic permeability and integrally molded with an insulating resin. An induction heating device for an electromagnetic cooker, wherein the iron core is formed into a disc shape by a plurality of fan-shaped iron cores, and an insulating liner is interposed between the iron core and the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63064612A JPH0650669B2 (en) | 1988-03-17 | 1988-03-17 | Induction heating device for electromagnetic cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63064612A JPH0650669B2 (en) | 1988-03-17 | 1988-03-17 | Induction heating device for electromagnetic cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01239791A JPH01239791A (en) | 1989-09-25 |
| JPH0650669B2 true JPH0650669B2 (en) | 1994-06-29 |
Family
ID=13263259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63064612A Expired - Lifetime JPH0650669B2 (en) | 1988-03-17 | 1988-03-17 | Induction heating device for electromagnetic cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0650669B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2100810B1 (en) * | 1994-09-27 | 1998-02-16 | Balay Sa | PERFECTED COIL FOR INDUCTION HEATING. |
| FR2726963B1 (en) * | 1994-11-15 | 1996-12-06 | Europ Equip Menager | INDUCTION COOKING FIREPLACE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131994U (en) * | 1984-02-14 | 1985-09-03 | 昭和電線電纜株式会社 | induction heating device |
-
1988
- 1988-03-17 JP JP63064612A patent/JPH0650669B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01239791A (en) | 1989-09-25 |
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