JP2005078949A - Induction heating device - Google Patents

Induction heating device Download PDF

Info

Publication number
JP2005078949A
JP2005078949A JP2003308173A JP2003308173A JP2005078949A JP 2005078949 A JP2005078949 A JP 2005078949A JP 2003308173 A JP2003308173 A JP 2003308173A JP 2003308173 A JP2003308173 A JP 2003308173A JP 2005078949 A JP2005078949 A JP 2005078949A
Authority
JP
Japan
Prior art keywords
magnetic shield
heating coil
induction heating
induction
magnetic
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.)
Granted
Application number
JP2003308173A
Other languages
Japanese (ja)
Other versions
JP4193642B2 (en
Inventor
Masakazu Gekito
政和 鷁頭
Akio Toba
章夫 鳥羽
Masaru Nakai
勝 中井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric FA Components and Systems Co Ltd
Original Assignee
Fuji Electric FA Components and Systems Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Electric FA Components and Systems Co Ltd filed Critical Fuji Electric FA Components and Systems Co Ltd
Priority to JP2003308173A priority Critical patent/JP4193642B2/en
Publication of JP2005078949A publication Critical patent/JP2005078949A/en
Application granted granted Critical
Publication of JP4193642B2 publication Critical patent/JP4193642B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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

  • Induction Heating Cooking Devices (AREA)
  • General Induction Heating (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating device in which, since in a method of forming a magnetic shield in parallel with an outer peripheral side face of a heating coil, magnetic flux is concentrated on the inside upper end of the magnetic shield, and even when the magnetic shield is formed of materials which are hard to be induction-heated (for example, aluminum, copper or the like), the loss of the magnetic shield caused by an eddy current increases too large to be ignored, resulting in the reduction of efficiency of the induction heating device, and therefore, the efficiency of induction heating can be improved and a rate of loss occurrence in the magnetic shield can be reduced while an effect of the leakage prevention of magnetic flux by the magnetic shield can be secured. <P>SOLUTION: In the induction heating device in which an induction current is generated in a heated material such as a pan for heating by the heating coil wound up in concentric circles in a flat plane and an electric power conversion device supplying high-frequency alternating-current electric power to the heater, a ring-shaped magnetic shield is formed outside the heating coil tilted against the heating coil side face. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、誘導加熱装置の加熱コイルから発生する漏洩磁束を低減する電磁シールド技術に関する。   The present invention relates to an electromagnetic shielding technique for reducing leakage magnetic flux generated from a heating coil of an induction heating device.

図６に従来例を示す。図６に示す従来例は、特許文献１の第１図および第２図に記載されているように、平板状の加熱コイル1の外周に円筒環状の磁気シールド３６を配置し、加熱コイル1の下部には高透磁率材料部材２１、２２、２３、２４を配置している。
この構成により、加熱コイル1の外側に対する漏洩磁束を磁気シールド３６で抑制し、加熱コイル1の下側に対する漏洩磁束を高透磁率材料部材２１、２２、２３、２４で抑制する。なお磁気シールド３６や高透磁率材料部材２１、２２、２３、２４がない場合は、輻射雑音の増大、周辺機器の誤動作や発熱などの悪影響を与えることとなる。
図７は図６におけるＡ−Ａ’断面図を示す。図７では図６で記載していない被加熱物4と磁界分布を追記している。加熱コイル1の上面では、加熱コイル1で発生する磁束の一部が被加熱物4を通過し、被加熱物４に渦電流を誘起し発熱させる。また加熱コイル1の下面では、加熱コイル1で発生する磁束の殆どが高透磁率材料部材２１、２２、２３、２４を通過する。 FIG. 6 shows a conventional example. In the conventional example shown in FIG. 6, as shown in FIGS. 1 and 2 of Patent Document 1, a cylindrical annular magnetic shield 36 is arranged on the outer periphery of the flat heating coil 1, and the heating coil 1 High permeability material members 21, 22, 23 and 24 are arranged in the lower part.
With this configuration, the leakage magnetic flux to the outside of the heating coil 1 is suppressed by the magnetic shield 36, and the leakage magnetic flux to the lower side of the heating coil 1 is suppressed by the high permeability material members 21, 22, 23, and 24. In the absence of the magnetic shield 36 and the high permeability material members 21, 22, 23, 24, adverse effects such as an increase in radiation noise, malfunction of peripheral devices and heat generation will be caused.
FIG. 7 is a cross-sectional view taken along the line AA ′ in FIG. In FIG. 7, the object to be heated 4 and the magnetic field distribution not shown in FIG. 6 are additionally shown. On the upper surface of the heating coil 1, part of the magnetic flux generated in the heating coil 1 passes through the object to be heated 4, and an eddy current is induced in the object to be heated 4 to generate heat. On the lower surface of the heating coil 1, most of the magnetic flux generated by the heating coil 1 passes through the high permeability material members 21, 22, 23 and 24.

加熱コイル1の外周側面では、加熱コイル1で発生する磁束の一部が広く分布しようとするが、誘導加熱されにくいアルミニウムや銅などで形成された磁気シールド３６には、渦電流が流れ、この渦電流により加熱コイル１から発生した磁力線を打ち消す方向に磁力線が発生する。従って、磁気シールド３６の環外周から外側への漏洩磁力線は相殺され、磁力線はシールド環の中に封じ込まれる。このようにして、加熱コイルからの輻射雑音のレベルは低減される。
特開昭５７−１１５７９５号広報（３頁−第１図、第２図） On the outer peripheral side surface of the heating coil 1, a part of the magnetic flux generated in the heating coil 1 tends to be widely distributed. However, an eddy current flows through the magnetic shield 36 formed of aluminum, copper, or the like that is difficult to be induction-heated. Magnetic field lines are generated in a direction to cancel the magnetic field lines generated from the heating coil 1 by eddy current. Therefore, the leakage magnetic field lines from the outer circumference of the magnetic shield 36 to the outside are canceled out, and the magnetic field lines are sealed in the shield ring. In this way, the level of radiation noise from the heating coil is reduced.
Japanese Laid-Open Patent Publication No. 57-115795 (page 3-FIGS. 1 and 2)

図６および図７に示す従来の実施例において、加熱コイル1の外周側面部の磁束分布から、加熱コイル1により発生する漏洩磁束を抑制する責務が、磁気シールド３６の内側上端に集中する。この結果、漏洩磁束を弱める方向の渦電流は、磁気シールド３６の内側上端部に集中することになり、磁気シールド３６を誘導加熱されにくい材料（例えばアルミニウムや銅など）で形成したとしても、渦電流による磁気シールド３６の発生損失が無視できないほどに大きくなり、誘導加熱装置の効率を低下させることになる。
従って、この発明の課題は、磁気シールドによる漏洩磁束抑制の効果を確保しながらも、磁気シールドにおける発生損失を低減させ、誘導加熱装置の効率を向上させることにある。 In the conventional embodiment shown in FIGS. 6 and 7, the duty to suppress the leakage magnetic flux generated by the heating coil 1 from the magnetic flux distribution on the outer peripheral side surface of the heating coil 1 is concentrated on the inner upper end of the magnetic shield 36. As a result, the eddy current in the direction of weakening the leakage magnetic flux is concentrated on the inner upper end of the magnetic shield 36, and even if the magnetic shield 36 is formed of a material that is difficult to be induction-heated (for example, aluminum or copper), The generated loss of the magnetic shield 36 due to the current becomes so large that it cannot be ignored, and the efficiency of the induction heating device is lowered.
Accordingly, an object of the present invention is to reduce the generated loss in the magnetic shield and improve the efficiency of the induction heating device while ensuring the effect of suppressing the leakage magnetic flux by the magnetic shield.

上述の課題を解決するため、請求項１の発明では、同心円上に平板状に巻かれた加熱コイルと前記加熱コイルに交流電力を供給する電力変換装置とにより、鍋などの被加熱物に誘導電流を発生させ加熱する誘導加熱装置において、前記加熱コイルの外側に、前記加熱コイル側面に対し傾斜を持った環状の磁気シールドを設けるようにした。
請求項２の発明では、請求項１の請求範囲において、前記磁気シールドの角部の少なくとも一つ以上を曲面とした。
請求項３の発明では、請求項１および請求項２の請求範囲において、前記磁気シールの断面形状を台形状あるいは三角形状とした。
請求項４の発明では、請求項３の請求範囲において、前記磁気シールドを中空とした。 In order to solve the above-described problem, in the invention of claim 1, induction is performed on an object to be heated such as a pan by a heating coil wound concentrically on a flat plate and a power converter for supplying AC power to the heating coil. In the induction heating apparatus for generating and heating an electric current, an annular magnetic shield having an inclination with respect to the side surface of the heating coil is provided outside the heating coil.
In the invention of claim 2, in the claim of claim 1, at least one of the corners of the magnetic shield is a curved surface.
According to a third aspect of the present invention, in the first and second aspects of the invention, the magnetic seal has a trapezoidal or triangular cross-sectional shape.
According to a fourth aspect of the present invention, the magnetic shield is hollow in the third aspect of the present invention.

請求項５の発明では、請求項３の請求範囲において、台形状あるいは三角形状の磁気シールドの一辺を取り除くようにした。   In the invention of claim 5, in the claim of claim 3, one side of the trapezoidal or triangular magnetic shield is removed.

本発明によれば、磁気シールドの発生損失が低減されるため、誘導加熱装置の電力変換効率が向上する。また磁気シールドの製造と保持固定が容易となるため、加工工数および組立時間が軽減され、さらに材料費が低減可能となる。   According to the present invention, since the generation loss of the magnetic shield is reduced, the power conversion efficiency of the induction heating device is improved. Moreover, since the magnetic shield can be easily manufactured and held and fixed, the number of processing steps and assembly time can be reduced, and the material cost can be further reduced.

同一円周上に平板状に巻かれた加熱コイル側面に対し傾斜を持った環状の磁気シールドを設けることにより、磁気シールドの内側上端（被加熱物のある側）の電流集中（または磁束密度）が緩和され、さらに磁気シールドの角部を曲面とすれば一層電流集中が緩和され、磁気シールドの発生損失が低減可能となる。
また磁気シールドの断面形状を台形状あるいは三角形状とすることにより、製造と保持固定が容易となり、また台形状あるいは三角形状の磁気シールドの形状を中空、あるいは一辺を取り除くことにより、磁気シールドの材料費が低減可能となる。 Current concentration (or magnetic flux density) at the inner upper end of the magnetic shield (the side with the object to be heated) by providing an annular magnetic shield that is inclined with respect to the side of the heating coil wound in a flat plate on the same circumference If the corners of the magnetic shield are curved, the current concentration is further relaxed and the generation loss of the magnetic shield can be reduced.
In addition, by making the cross-sectional shape of the magnetic shield trapezoidal or triangular, manufacturing and holding and fixing become easy, and the shape of the magnetic shield of the trapezoidal or triangular shape is hollow or by removing one side, the material of the magnetic shield Costs can be reduced.

図１は本発明の第１の実施形態を示す誘導加熱装置の断面図である。
図示のように、加熱コイル1の上部には被加熱物４を配置し、加熱コイル1の下部には高透磁率材料部材２１、２２を配置し、加熱コイル1の外側には加熱コイル1の側面に対し傾斜持った環状の磁気シールド３１を配置している。
磁気シールド３１を加熱コイル1の側面に対して傾斜を持たせることにより、加熱コイル1の側面における磁束分布に沿った配置となる。この結果、加熱コイル1により発生する漏洩磁束を抑制する責務が、磁気シールド３１の側面部に広がることになり、また磁気シールド３１の誘起電流も側面部に広がり、内側上端の電流集中が緩和される。 FIG. 1 is a cross-sectional view of an induction heating apparatus showing a first embodiment of the present invention.
As shown in the figure, an object to be heated 4 is disposed above the heating coil 1, high permeability material members 21 and 22 are disposed below the heating coil 1, and the heating coil 1 is disposed outside the heating coil 1. An annular magnetic shield 31 inclined with respect to the side surface is disposed.
By giving the magnetic shield 31 an inclination with respect to the side surface of the heating coil 1, the magnetic shield 31 is arranged along the magnetic flux distribution on the side surface of the heating coil 1. As a result, the responsibility for suppressing the leakage magnetic flux generated by the heating coil 1 is spread to the side surface portion of the magnetic shield 31, and the induced current of the magnetic shield 31 is also spread to the side surface portion, so that the current concentration at the inner upper end is alleviated. The

図２は本発明の第２の実施形態を示す誘導加熱装置の断面図である。
図１との相違点は、磁気シールド３２の角部を曲面とした点である。図１の実施例において、誘起電流の集中が大幅に緩和されるが、内側上端は全体に比べて電流密度が高い。
磁気シールド３２の角部を曲面とすることにより、内側上端の電流密度がさらに緩和されることになる。 FIG. 2 is a cross-sectional view of an induction heating apparatus showing a second embodiment of the present invention.
The difference from FIG. 1 is that the corners of the magnetic shield 32 are curved. In the embodiment shown in FIG. 1, the concentration of the induced current is greatly reduced, but the inner upper end has a higher current density than the whole.
By making the corner portion of the magnetic shield 32 a curved surface, the current density at the inner upper end is further relaxed.

図３は本発明の第３の実施形態を示す誘導加熱装置の断面図である。
図１との相違点は、磁気シールド３３の断面形状を台形状とした点である。図１および図２の実施例において、磁気シールドに傾斜を持たせる場合、板状の磁気シールド材をすり鉢状に成形することになり製造が複雑となる。また磁気シールドを保持固定するために、新たな部材が必要となるといった新たな課題が生じる。
本発明はこの新たな課題を解決するためのものであり、磁気シールド３３の断面形状を台形状とすることにより、鋳型などによる成形でその製造が簡単化され、さらに磁気シールド３３の保持固定に新たな部材が不要となる。 FIG. 3 is a cross-sectional view of an induction heating apparatus showing a third embodiment of the present invention.
The difference from FIG. 1 is that the cross-sectional shape of the magnetic shield 33 is trapezoidal. In the embodiment shown in FIGS. 1 and 2, when the magnetic shield is inclined, the plate-like magnetic shield material is formed into a mortar shape, which makes the manufacture complicated. In addition, a new problem arises that a new member is required to hold and fix the magnetic shield.
The present invention is to solve this new problem. By making the cross-sectional shape of the magnetic shield 33 trapezoidal, its production is simplified by molding with a mold or the like, and the magnetic shield 33 is held and fixed. A new member becomes unnecessary.

図４はこの発明の第４の実施形態を示す誘導加熱装置の断面図である。
図３との相違点は、磁気シールド３４の形状を中空とした点である。図３の実施例において、磁気シールドを台形状あるいは三角形状とする場合、磁気シールドの形状が大きく材料費が高くなるといった新たな課題が生じる。
本発明はこの新たな課題を解決するためのものであり、磁気シールド３４の形状を中空とすることにより、製造の簡単化と保持固定が容易である点を確保しながらも、磁気シールドの材料費を低減することが可能となる。 FIG. 4 is a cross-sectional view of an induction heating apparatus showing a fourth embodiment of the present invention.
The difference from FIG. 3 is that the shape of the magnetic shield 34 is hollow. In the embodiment of FIG. 3, when the magnetic shield is trapezoidal or triangular, a new problem arises that the shape of the magnetic shield is large and the material cost is high.
The present invention is for solving this new problem. By making the shape of the magnetic shield 34 hollow, it is possible to simplify the manufacture and secure the point of being easy to hold and fix the material of the magnetic shield. Costs can be reduced.

図５はこの発明の第５の実施形態を示す誘導加熱装置の断面図である。
図３との相違点は、磁気シールド３５の形状の中側および下側を取り除くようにした点である。すなわち図４から下側の一辺を取り除いた形状である。磁気シールド３５の中側および下側を取り除くことにより、製造の簡単化と保持固定が容易である点を確保しながら、磁気シールドの材料費を低減することが可能となる。 FIG. 5 is a cross-sectional view of an induction heating apparatus showing a fifth embodiment of the present invention.
The difference from FIG. 3 is that the inner side and the lower side of the shape of the magnetic shield 35 are removed. That is, the shape is obtained by removing the lower side from FIG. By removing the inner side and the lower side of the magnetic shield 35, it is possible to reduce the material cost of the magnetic shield while ensuring that the manufacturing is easy and the holding and fixing are easy.

本発明は、誘導加熱装置の漏れ磁束による輻射ノイズの低減のほかに、電力変換回路に空心リアクトルやギャップ付磁性体を用いたリアクトルや変圧器などを用いた各種電源装置の磁気シールドに適用可能である。   The present invention can be applied to the magnetic shield of various power supply devices using an air core reactor, a reactor using a gap-attached magnetic body, a transformer, etc. in addition to reducing radiation noise due to leakage flux of the induction heating device. It is.

本発明による第１の実施形態を示す誘導加熱装置の断面図である。It is sectional drawing of the induction heating apparatus which shows 1st Embodiment by this invention. 本発明による第２の実施形態を示す誘導加熱装置の断面図である。It is sectional drawing of the induction heating apparatus which shows 2nd Embodiment by this invention. 本発明による第３の実施形態を示す誘導加熱装置の断面図である。It is sectional drawing of the induction heating apparatus which shows 3rd Embodiment by this invention. 本発明による第４の実施形態を示す誘導加熱装置の断面図である。It is sectional drawing of the induction heating apparatus which shows 4th Embodiment by this invention. 本発明による第５の実施形態を示す誘導加熱装置の断面図である。It is sectional drawing of the induction heating apparatus which shows 5th Embodiment by this invention. 従来の実施例を示す誘導加熱装置の構造図である。It is a structure figure of the induction heating apparatus which shows the conventional Example. 図６に示す従来の実施例を示す誘導加熱装置の断面図である。It is sectional drawing of the induction heating apparatus which shows the conventional Example shown in FIG.

符号の説明Explanation of symbols

１・・・加熱コイル ２１、２２、２３、２４・・・高透磁率材料部材
３１、３２、３３、３４、３５、３６・・・磁気シールド ４・・・被加熱物
DESCRIPTION OF SYMBOLS 1 ... Heating coil 21, 22, 23, 24 ... High magnetic permeability material member 31, 32, 33, 34, 35, 36 ... Magnetic shield 4 ... To-be-heated object

Claims (5)

同心円上に平板状に巻かれた加熱コイルと前記加熱コイルに高周波の交流電力を供給する電力変換装置とにより、被加熱物容器に誘導電流を発生させ加熱する電磁誘導加熱装置において、前記加熱コイルの外側に、前記加熱コイル側面に対し傾斜を持った環状の磁気シールドを設けたことを特徴とする誘導加熱装置。   In the electromagnetic induction heating apparatus that generates and heats an object to be heated by a heating coil wound concentrically on a flat plate and a power converter that supplies high-frequency AC power to the heating coil, the heating coil An induction heating apparatus, characterized in that an annular magnetic shield having an inclination with respect to the side surface of the heating coil is provided outside. 請求項１に記載の請求範囲において、前記磁気シールドの角部の少なくとも一つ以上を曲面としたことを特徴とする誘導加熱装置。   The induction heating apparatus according to claim 1, wherein at least one of the corners of the magnetic shield is a curved surface. 請求項１および請求項２に記載の請求範囲において、前記磁気シールドの断面形状を台形状あるいは三角形状としたことを特徴とする誘導加熱装置。   3. An induction heating apparatus according to claim 1, wherein the magnetic shield has a trapezoidal or triangular cross section. 請求項３記載の請求範囲において、前記磁気シールドを中空としたことを特徴とする誘導加熱装置。   The induction heating apparatus according to claim 3, wherein the magnetic shield is hollow. 請求項３および請求項４に記載の請求範囲において、台形状あるいは三角形状の磁気シールドの一辺を取り除いたことを特徴とする誘導加熱装置。
5. An induction heating apparatus according to claim 3, wherein one side of the trapezoidal or triangular magnetic shield is removed.
JP2003308173A 2003-09-01 2003-09-01 Induction heating device Expired - Lifetime JP4193642B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003308173A JP4193642B2 (en) 2003-09-01 2003-09-01 Induction heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003308173A JP4193642B2 (en) 2003-09-01 2003-09-01 Induction heating device

Publications (2)

Publication Number Publication Date
JP2005078949A true JP2005078949A (en) 2005-03-24
JP4193642B2 JP4193642B2 (en) 2008-12-10

Family

ID=34410716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003308173A Expired - Lifetime JP4193642B2 (en) 2003-09-01 2003-09-01 Induction heating device

Country Status (1)

Country Link
JP (1) JP4193642B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013062258A (en) * 2012-12-19 2013-04-04 Mitsubishi Electric Corp Induction heating cooker
JP2014160674A (en) * 2014-05-01 2014-09-04 Mitsubishi Electric Corp Induction heating cooker
CN108278642A (en) * 2017-12-26 2018-07-13 佛山市顺德区雅盈电器制造有限公司 A kind of electromagnetic oven
CN109792161A (en) * 2016-10-13 2019-05-21 三菱电机株式会社 Noncontact power transfer device and non-contact power transmission system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013062258A (en) * 2012-12-19 2013-04-04 Mitsubishi Electric Corp Induction heating cooker
JP2014160674A (en) * 2014-05-01 2014-09-04 Mitsubishi Electric Corp Induction heating cooker
CN109792161A (en) * 2016-10-13 2019-05-21 三菱电机株式会社 Noncontact power transfer device and non-contact power transmission system
EP3528363A4 (en) * 2016-10-13 2019-10-09 Mitsubishi Electric Corporation Non-contact power transmission device and non-contact power transmission system
US10797529B2 (en) 2016-10-13 2020-10-06 Mistubishi Electric Corporation Wireless power transfer apparatus and wireless power transfer system
CN108278642A (en) * 2017-12-26 2018-07-13 佛山市顺德区雅盈电器制造有限公司 A kind of electromagnetic oven
CN108278642B (en) * 2017-12-26 2023-12-29 佛山市顺德区雅盈电器制造有限公司 Electromagnetic oven

Also Published As

Publication number Publication date
JP4193642B2 (en) 2008-12-10

Similar Documents

Publication Publication Date Title
JP6645163B2 (en) Motor core annealing equipment
JP4313775B2 (en) Induction heating method and apparatus
JP5042909B2 (en) Induction heating apparatus and induction heating method for metal plate
JP4193642B2 (en) Induction heating device
JP5297306B2 (en) Induction heating method and induction heating apparatus
JP6374571B2 (en) Heating device
JP2011023488A (en) Stationary induction apparatus
JP5920092B2 (en) Induction heating device
JP2010257891A (en) Induction heating cooker
JP2016207255A (en) Heating cooker
JP4654743B2 (en) Induction heating cooker
JP2011035159A (en) Stationary induction appliance
JP6862314B2 (en) rice cooker
JP2008171585A (en) Electromagnetic induction heating device
JP2008293905A (en) Induction heating coil and induction heating device
KR20090079421A (en) Induction Heating Apparatus using High Frequency
JP2016115614A (en) Induction heating coil unit and induction heating device
CN106489299B (en) Heating coil
JP5033370B2 (en) Induction heating device
JP4654167B2 (en) Container to be heated
JP2005304759A (en) Rice cooker
JP2008258339A (en) Static induction electrical apparatus
JP2006310198A (en) Induction heating device and its method
JP2004174085A (en) Cooking vessel
JP2018115852A (en) Super-heating stem generating apparatus

Legal Events

Date Code Title Description
RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20060703

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060704

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060810

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080218

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080226

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080403

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080902

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080915

R150 Certificate of patent or registration of utility model

Ref document number: 4193642

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111003

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121003

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131003

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term