JP4304853B2 - Electromagnetic cooker - Google Patents
Electromagnetic cooker Download PDFInfo
- Publication number
- JP4304853B2 JP4304853B2 JP2000283803A JP2000283803A JP4304853B2 JP 4304853 B2 JP4304853 B2 JP 4304853B2 JP 2000283803 A JP2000283803 A JP 2000283803A JP 2000283803 A JP2000283803 A JP 2000283803A JP 4304853 B2 JP4304853 B2 JP 4304853B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- heating coil
- annular frame
- coil base
- hub
- 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
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Classifications
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- 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
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
Description
【0001】
【発明の属する技術分野】
この発明は、鍋底に渦電流を生じさせて鍋の中の食材を加熱調理する電磁調理器に関し、特に加熱コイルを支持するコイルベースに関する。
【0002】
【従来の技術】
上記電磁調理器は、コイルベースに支持された渦巻形の加熱コイルの上方に、トッププレートと呼ばれる台が適宜のギャップを介して配置され、このトッププレートの上に鉄系の鍋が載置される。加熱コイルに高周波電流が通流されると、その磁力線がトッププレートを透過して鍋の底部を通り、この底部に渦電流を生じさせる。鍋はこの渦電流のジュール熱で発熱し、中の食材を加熱する。加熱コイルはリッツ線が渦巻形に巻かれ、線間が融着固化されて中空円盤状に形成されている。この加熱コイルを支持するコイルベースは耐熱樹脂から成形され、一般に加熱コイルの中空部が嵌合するハブと、加熱コイルの周縁部を支持する環状枠と、この環状枠と前記ハブとを連結する放射状のスポークとからなり、スポーク部には加熱コイルの磁束漏れを防ぐフェライトコアが装着されている。
【0003】
図6はこのようなコイルベースの従来構成を示すもので、図6の(A)は平面図、(B)は正面図である。図6において、コイルベース1は、中心部のハブ1aと、その外側の環状枠1bと、この環状枠1bとハブ1aとを連結する放射状のスポーク1cとからなっている。各スポーク1cの上面には溝が形成され、この溝に加熱コイルの磁束漏れを防ぐフェライトコア2が接着剤で固着されている環状枠1bには、一対の取付フランジが1dが設けられている。図7は、コイルベース1の上面に加熱コイル3が支持された状態の平面図である。加熱コイル3はリッツ線が渦巻形に巻かれて中空円盤状に形成され、中空部を介して円筒状のハブ1aに嵌合されている。
【0004】
【発明が解決しようとする課題】
図6に示すように、コイルベース1はフェライトコア2の装着部を除いて平板状で、厚さは数mm程度、環状体1bの外径は200mm程度である。このコイルベース1は、フェノール樹脂などから射出成形で一体成形されるが、薄い板体であるため、成形時の残留応力ひずみにより、成形後に図6(B)に2点鎖線で示すような反りが生じやすかった。コイルベース1に反りがあると、その上面に支持される加熱コイル3とその上方のトッププレートに載置される鍋との間のギャップが変わるため、加熱特性が不安定になる。従って、従来は成形後の反りの矯正に多くの工数を要し、また反りを完全に除去することは困難であった。
そこで、この発明の課題は、反りのないコイルベースを成形することにある。
【0005】
【課題を解決するための手段】
この発明は、中空円盤状の加熱コイルが耐熱樹脂からなるコイルベースに支持されるとともに、前記加熱コイルの上方に鍋を載置するトッププレートが配置され、前記コイルベースは前記加熱コイルの中空部が嵌合するハブと、前記加熱コイルの周縁部を支持する環状枠と、この環状枠と前記ハブとを連結する放射状のスポークとを備える電磁調理器において、前記コイルベースの環状枠及びスポークの横断面形状をいずれも左右対称のH形状に形成するものである(請求項1)。発明者は反りの生じないコイルベース形状について成形実験を繰り返し、部材断面を上記の通り左右対称のH形状にすることにより、反りがほとんど生じないことを見出したものである。
【0006】
【発明の実施の形態】
図1はこの発明の実施の形態を示すコイルベースの平面図、図2図1のII−II線に沿う断面図、図3は同じくIII−III線に沿う断面図である。図1において、コイルベース1は耐熱性のフェノール樹脂から射出成形により形成され、円筒状のハブ1aと、その外側の環状枠1bと、この環状枠1bとハブ1aとを連結する放射状のスポーク1cとを備えている。環状枠1bには3箇所に取付脚1dが設けられている。ハブ1aの中心には、十字状のスポークを介して鍋の温度を検出する図示しない温度センサを支持するセンサ支持部1eが設けられている。ここで、図2及び図3に示すように、環状枠1b及びスポーク1cの横断面形状は、いずれも左右対称のH形状に形成されている。各スポーク1cには、H形断面の上半部に構成される溝を利用して、短冊形のフェライトコア2が装着され、溝側壁の上縁に一体形成された弾性爪1fにより係止されている。
【0007】
図4はコイルベース1の上面に加熱コイル3が支持された状態の平面図である。渦巻形に巻かれたリッツ線からなる中空円盤上の加熱コイル3は、中空部を介してハブ1aに嵌合され、周縁部は環状枠1bに支持されている。コイルベース1には加熱コイル3を押圧保持するY字状のコイルホルダ4が係合により装着され、コイルベース1の取付脚1d(図1)と一緒に電磁調理器箱体にねじにより締め付けられる。図5は図4の拡大右側面図で、コイルホルダ4の支持突起4a上にトッププレート5が図示の通り支持され、トッププレート5の上に図示しない鍋が載置される。
【0008】
【発明の効果】
この発明によれば、コイルベースに反りが生じないため、成形後の反りの矯正作業が不要になるとともに、成形材料の収縮率や線膨張係数などの特性を落とすことができ、形状の安定したコイルベースを安価に成形することができる。
【図面の簡単な説明】
【図1】この発明の実施の形態を示すコイルベースの平面図である。
【図2】図1のII−II線に沿う断面図である。
【図3】図1のIII−III線に沿う断面図である。
【図4】図1のコイルベースの加熱コイルを支持した状態の平面図である。
【図5】図4の拡大右側面図である。
【図6】従来のコイルベースを示し、(A)は平面図、(B)は正面図である。
【図7】図6のコイルベースの加熱コイルを支持した状態の平面図である。
【符号の説明】
1 コイルベース
1a ハブ
1b 環状枠
1c スポーク
3 加熱コイル
4 コイルホルダ
5 トッププレート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic cooker that heats and cooks food in a pan by generating an eddy current in the pan bottom, and more particularly to a coil base that supports a heating coil.
[0002]
[Prior art]
In the above-described electromagnetic cooker, a table called a top plate is disposed above a spiral heating coil supported by a coil base via an appropriate gap, and an iron pan is placed on the top plate. The When a high-frequency current is passed through the heating coil, the lines of magnetic force pass through the top plate and pass through the bottom of the pan, creating an eddy current at the bottom. The pan generates heat due to the Joule heat of this eddy current and heats the ingredients inside. The heating coil is formed in a hollow disk shape by litz wire wound in a spiral shape and the wires are fused and solidified. A coil base that supports the heating coil is molded from a heat-resistant resin, and generally a hub in which a hollow portion of the heating coil is fitted, an annular frame that supports a peripheral portion of the heating coil, and the annular frame and the hub are connected to each other. It consists of radial spokes, and a ferrite core that prevents magnetic flux leakage of the heating coil is attached to the spokes.
[0003]
FIG. 6 shows a conventional configuration of such a coil base. FIG. 6A is a plan view and FIG. 6B is a front view. In FIG. 6, the
[0004]
[Problems to be solved by the invention]
As shown in FIG. 6, the
Therefore, an object of the present invention is to form a coil base without warping.
[0005]
[Means for Solving the Problems]
According to the present invention, a hollow disk-shaped heating coil is supported by a coil base made of a heat-resistant resin, and a top plate on which a pan is placed is disposed above the heating coil, and the coil base is a hollow portion of the heating coil. In an electromagnetic cooker comprising: a hub to which the coil is fitted; an annular frame that supports a peripheral portion of the heating coil; and a radial spoke that connects the annular frame and the hub. All of the cross-sectional shapes are formed in a symmetrical H shape (Claim 1). The inventor has repeatedly conducted a molding experiment on a coil base shape that does not warp, and found that the warp hardly occurs by making the cross-section of the member a symmetrical H shape as described above.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 is a plan view of a coil base showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III. In FIG. 1, a
[0007]
FIG. 4 is a plan view showing a state in which the
[0008]
【The invention's effect】
According to the present invention, since the coil base does not warp, correction work for warping after molding becomes unnecessary, and characteristics such as the shrinkage rate and linear expansion coefficient of the molding material can be reduced, and the shape is stable. The coil base can be formed at low cost.
[Brief description of the drawings]
FIG. 1 is a plan view of a coil base showing an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a plan view showing a state in which the coil-based heating coil of FIG. 1 is supported. FIG.
5 is an enlarged right side view of FIG. 4. FIG.
6A and 6B show a conventional coil base, in which FIG. 6A is a plan view and FIG. 6B is a front view.
7 is a plan view of a state in which the coil-based heating coil of FIG. 6 is supported. FIG.
[Explanation of symbols]
1 Coil
Claims (1)
前記コイルベースの環状枠及びスポークの横断面形状をいずれも左右対称のH形状に形成したことを特徴とする電磁調理器。A hollow disk-shaped heating coil is supported by a coil base made of a heat-resistant resin, and a top plate for placing a pan is disposed above the heating coil. The coil base is fitted with a hollow portion of the heating coil. In an electromagnetic cooker comprising a hub, an annular frame that supports a peripheral edge of the heating coil, and radial spokes that connect the annular frame and the hub,
An electromagnetic cooker characterized in that both the annular frame of the coil base and the cross-sectional shape of the spoke are formed in a symmetrical H shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2000283803A JP4304853B2 (en) | 2000-09-19 | 2000-09-19 | Electromagnetic cooker |
Applications Claiming Priority (1)
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JP2000283803A JP4304853B2 (en) | 2000-09-19 | 2000-09-19 | Electromagnetic cooker |
Publications (2)
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JP2002093557A JP2002093557A (en) | 2002-03-29 |
JP4304853B2 true JP4304853B2 (en) | 2009-07-29 |
Family
ID=18768111
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JP2000283803A Expired - Lifetime JP4304853B2 (en) | 2000-09-19 | 2000-09-19 | Electromagnetic cooker |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5662736B2 (en) * | 2010-08-20 | 2015-02-04 | 株式会社ダイヘン | Heating coil unit of electromagnetic induction heating cooker |
JP5683687B2 (en) * | 2011-04-15 | 2015-03-11 | 三菱電機株式会社 | Induction heating coil and induction heating cooker using this induction heating coil |
KR101531215B1 (en) * | 2014-12-04 | 2015-06-24 | (주)피스월드 | Coil base |
-
2000
- 2000-09-19 JP JP2000283803A patent/JP4304853B2/en not_active Expired - Lifetime
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