JP4185438B2 - Heating element for induction cooking - Google Patents
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- JP4185438B2 JP4185438B2 JP2003374480A JP2003374480A JP4185438B2 JP 4185438 B2 JP4185438 B2 JP 4185438B2 JP 2003374480 A JP2003374480 A JP 2003374480A JP 2003374480 A JP2003374480 A JP 2003374480A JP 4185438 B2 JP4185438 B2 JP 4185438B2
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本発明は、誘導加熱を利用した誘導加熱調理器によって内容物を加熱することができる誘導加熱調理用容器に用いられる誘導加熱調理用の発熱体に関する。 The present invention relates to a heating element for induction heating cooking used for an induction heating cooking container capable of heating contents by an induction heating cooker using induction heating.
この種の誘導加熱調理用容器は電磁誘導によって発熱する発熱体を備えている。該容器を誘導加熱調理器の容器載置面に載置して該調理器の誘導加熱コイルに電流を流すと、高周波磁界が発生して発熱体に渦電流が誘起され、渦電流により発熱体が抵抗損失で発熱し、これにより容器内に入れられた内容物が温められる。 This type of induction cooking container includes a heating element that generates heat by electromagnetic induction. When the container is placed on the container mounting surface of the induction heating cooker and a current is passed through the induction heating coil of the cooker, a high-frequency magnetic field is generated and an eddy current is induced in the heating element. Generates heat due to resistance loss, thereby warming the contents placed in the container.
本発明者らは従来より、容器本体を非導電性材料から形成し、該容器本体とは別体構成の発熱体を備えた誘導加熱調理器用容器について継続的に研究開発を行っており、その開発過程において、発熱体の取り扱い性の向上や破損防止等の目的で、導電性シートからなる発熱体本体の両面に合成樹脂フィルムを積層した樹脂被覆型の発熱体を開発した。 The present inventors have conventionally conducted research and development on a container for an induction heating cooker that is formed of a non-conductive material and is provided with a heating element separate from the container body. During the development process, we developed a resin-coated heating element in which synthetic resin films were laminated on both sides of a heating element body made of a conductive sheet for the purpose of improving the handling of the heating element and preventing damage.
この樹脂被覆型の発熱体は、両面の合成樹脂フィルムによって全体の厚みが増すため取り扱い性が向上し、しかも合成樹脂フィルムによって発熱体本体が保護されるためその耐久性も向上するという利点を有している。 This resin-coated heating element has the advantage that the overall thickness is increased by the synthetic resin films on both sides, so that the handleability is improved, and the durability of the heating element body is also improved because the heating element body is protected by the synthetic resin film. is doing.
しかしながら、この発熱体は、長尺状の第１及び第２のプラスチックシートの間に長尺状の導電性シートを積層したものを、例えば略中央に丸形の貫通孔を有する円盤状等、所望の形状に合わせて打ち抜く等することにより形成していた。従って、製造された発熱体は、発熱体本体の端面、即ち、発熱体本体が貫通孔を有する場合には外側端面と内側端面、貫通孔を有しない場合には外側端面が、それぞれ外部に露出している。そのため、内容物と発熱体本体の端面とが接触して発熱体本体が腐食したり変質したり、プラスチックシートと導電性シートが剥離したりする可能性がある。 However, this heating element is obtained by laminating a long conductive sheet between the long first and second plastic sheets, for example, a disk shape having a round through hole at the center, etc. It was formed by punching in accordance with a desired shape. Therefore, the manufactured heating element has an end face of the heating element body, that is, an outer end face and an inner end face when the heating element body has a through hole, and an outer end face when the heating element body does not have a through hole. is doing. Therefore, there is a possibility that the contents and the end face of the heating element main body come into contact with each other and the heating element main body is corroded or deteriorated, or the plastic sheet and the conductive sheet are peeled off.
そこで本発明は、上記従来の問題点に鑑みてなされ、導電性シートからなる発熱体本体と内容物との接触を防止することを課題とする。 Then, this invention is made | formed in view of the said conventional problem, and makes it a subject to prevent the heat generating body main body which consists of an electroconductive sheet, and the content.
本発明は、上記課題を解決すべくなされたものであり、本発明に係る誘導加熱調理用の発熱体は、非導電性材料からなる容器内で電磁誘導により発熱する誘導加熱調理用の発熱体において、電磁誘導で発熱する導電性シートからなる発熱体本体の両面には各面を覆うようにそれぞれ合成樹脂製のフィルムが積層され、発熱体本体及び両フィルムからなる積層体の端面が、射出成形により積層体に装着された合成樹脂製の射出成形体で覆われており、射出成形体は、積層体よりも厚肉であって且つ積層体の下面よりも下方に突出していることを特徴とする。 The present invention has been made to solve the above problems, and the heating element for induction heating cooking according to the present invention is a heating element for induction heating cooking that generates heat by electromagnetic induction in a container made of a non-conductive material. , A synthetic resin film is laminated on both sides of the heating element body made of a conductive sheet that generates heat by electromagnetic induction so as to cover each surface, and the end faces of the heating element body and the laminate made of both films are injected. It is covered with a synthetic resin injection molded body mounted on the laminate by molding, and the injection molded body is thicker than the laminate and protrudes downward from the lower surface of the laminate. And
該構成の発熱体にあっては、発熱体本体及び両フィルムからなる積層体の端面が合成樹脂製の射出成形体で覆われていて露出していないため、容器内において内容物を加熱する際にその内容物が発熱体本体の端面に接触しない。また、厚肉の射出成形体によって積層体が包囲されているので、薄い積層体が厚肉の射出成形体によって補強され、発熱体の強度が高まる。また、積層体の下方には射出成形体の突出分だけ隙間が発生するので、その隙間に例えば水等の内容物が浸入しやすくなり、内容物の加熱効率が向上すると共に、発熱によって発熱体の下面側に発生した気泡が排出される。このため熱によって積層体が損傷することが抑制されることとなる。 In the heating element of this configuration, the end face of the heating element main body and the laminate composed of both films are covered with a synthetic resin injection molded body and are not exposed, so when heating the contents in the container The contents do not contact the end face of the heating element body. Further, since the laminated body is surrounded by the thick injection molded body, the thin laminated body is reinforced by the thick injection molded body, and the strength of the heating element is increased. Further, since a gap is generated below the laminated body by an amount corresponding to the protrusion of the injection molded body, contents such as water can easily enter the gap, and the heating efficiency of the contents is improved, and the heating element is generated by heat generation. Bubbles generated on the lower surface side of the are discharged. For this reason, it is suppressed that a laminated body is damaged with a heat | fever.
更に、積層体はその略中央に貫通孔を有し、積層体の内側端面と外側端面にそれぞれ射出成形体が装着されていることが好ましい。この場合、内外二つの射出成形体によって積層体が補強されるので更に強度が大きくなる。しかも、略中央にも厚い射出成形体が存在するので、発熱体の上に内容物の重量が作用しても発熱体の下方への撓み、変形が抑制され、特に、下方に突出した射出成形体が突っ張りとなるので、積層体の略中央部分においても容器の底部内面との間の隙間が維持される。 Furthermore, it is preferable that the laminated body has a through-hole at substantially the center thereof, and injection molded bodies are mounted on the inner end face and the outer end face of the laminated body, respectively. In this case, since the laminate is reinforced by the two inner and outer injection molded bodies, the strength is further increased. Moreover, since there is a thick injection-molded body in the approximate center, even if the weight of the contents acts on the heating element, the downward bending and deformation of the heating element are suppressed, and in particular, the injection molding projecting downward. Since the body is stretched, a gap between the container and the inner surface of the bottom of the container is maintained even in the substantially central portion of the laminate.
また、内外両射出成形体の下面同士は略面一であり、内外両射出成形体の下面のうち少なくとも一方には該下面を内外方向に横断する溝が形成されていることが好ましい。この場合、内外両射出成形体の下面同士が略面一であるので発熱体の変形がより一層少なくなって発熱体は安定する。そして、その下面に設けられた溝を介して水等の内容物が積層体の下方の隙間に浸入することができる。 Moreover, it is preferable that the lower surfaces of the inner and outer injection molded bodies are substantially flush with each other, and at least one of the lower surfaces of the inner and outer injection molded bodies is formed with a groove that crosses the lower surface in the inner and outer directions. In this case, since the lower surfaces of both the inner and outer injection molded bodies are substantially flush with each other, deformation of the heating element is further reduced and the heating element is stabilized. And contents, such as water, can penetrate | invade into the clearance gap below a laminated body through the groove | channel provided in the lower surface.
このように本発明に係る発熱体にあっては、積層体の端面あるいは発熱体本体が射出成形体によって覆われているので発熱体本体と内容物との接触が防止される。 As described above, in the heating element according to the present invention, since the end face of the laminated body or the heating element body is covered with the injection molded body, the contact between the heating element body and the contents is prevented.
以下、本発明の誘導加熱調理用の発熱体の一実施形態について図面を参酌しつつ説明する。
本実施形態における発熱体１は、図１及び図２に示すように略中央に丸形の貫通孔４を有する円盤状である。該発熱体１は、導電性シートからなる発熱体本体２と該発熱体本体２の上下両面に各々積層された合成樹脂製のフィルム３とからなる積層体５を備えている。該積層体５は、その略中央に貫通孔が形成されたループ状（ドーナツ状）であるが、その内縁部と外縁部には射出成形体６，７が一体的に装着されている。該射出成形体６，７は幅略一定のリング状であって周方向の厚みも略一定である。そして、両射出成形体６，７は、共に積層体５よりも厚肉に形成され、積層体５の上下両面から上方、下方共に突出している。また、両射出成形体６，７の厚みは略同じであって、その下面６ａ，７ａ同士も略面一である。より詳細には、内外両射出成形体６，７は、図２のように共に断面視略コの字状に形成され、積層体５の内側端面５ａと外側端面５ｂが露出しないようにそれぞれ覆うと共に、積層体５の上面周縁部と下面周縁部を所定幅に亘ってそれぞれ覆っている。また、両射出成形体６，７の下面６ａ，７ａには、それぞれ内外方向（径方向）に横断するように溝８，９が形成されている。該溝８，９は、周方向に間隔をおいて複数形成されている。尚、図１において、射出成形体６，７の下面６ａ，７ａのうち、溝８，９以外の領域にはハッチングを施している。尚、溝８，９の深さや幅は適宜設定すればよく、複数の溝において深さや幅等が異なっていても無論よい。
Hereinafter, an embodiment of a heating element for induction heating cooking of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the heating element 1 in the present embodiment has a disk shape having a round through-hole 4 at substantially the center. The heating element 1 includes a laminate 5 composed of a heating element body 2 made of a conductive sheet and a synthetic resin film 3 laminated on both upper and lower surfaces of the heating element body 2. The laminated body 5 has a loop shape (doughnut shape) in which a through-hole is formed at substantially the center thereof, and injection molded bodies 6 and 7 are integrally attached to the inner edge portion and the outer edge portion thereof. The injection-molded bodies 6 and 7 are ring-shaped with a substantially constant width, and the thickness in the circumferential direction is also substantially constant. Both the injection molded bodies 6 and 7 are formed thicker than the laminated body 5, and project upward and downward from both the upper and lower surfaces of the laminated body 5. Moreover, the thickness of both the injection molded bodies 6 and 7 is substantially the same, The lower surfaces 6a and 7a are also substantially flush. More specifically, both the inner and outer injection molded bodies 6 and 7 are formed in a substantially U shape in cross section as shown in FIG. 2 and cover the inner end face 5a and the outer end face 5b of the laminate 5 so as not to be exposed. At the same time, the upper peripheral edge and the lower peripheral edge of the laminate 5 are respectively covered over a predetermined width. Grooves 8 and 9 are formed on the lower surfaces 6a and 7a of the injection molded bodies 6 and 7 so as to cross inward and outward (radial direction), respectively. A plurality of the grooves 8 and 9 are formed at intervals in the circumferential direction. In FIG. 1, areas other than the grooves 8 and 9 are hatched on the lower surfaces 6 a and 7 a of the injection molded bodies 6 and 7. It should be noted that the depth and width of the grooves 8 and 9 may be set as appropriate, and it goes without saying that the depth and width of the plurality of grooves are different.
ここで、発熱体本体２を構成する導電性材料としては、例えば、銅、チタン、真鍮、アルミニウム、マグネシウム合金、銀、ニッケル、鉄、ステンレス、クロム等の金属材料や、カーボン等の非金属材料があり、金メッキ、銀メッキやニッケルメッキ等も使用できるが、アルミニウム、ステンレス、銅、鉄が好ましく、特に、アルミニウムが最も好ましい。また、発熱体本体２の厚さは、例えばアルミニウムの場合には５乃至１００μｍ程度であり、特に１０乃至３０μｍのものが発熱効率と取り扱い性とを両立させることができるため好ましい。 Here, examples of the conductive material constituting the heating element body 2 include metal materials such as copper, titanium, brass, aluminum, magnesium alloy, silver, nickel, iron, stainless steel, and chromium, and non-metallic materials such as carbon. Although gold plating, silver plating, nickel plating, etc. can be used, aluminum, stainless steel, copper, and iron are preferable, and aluminum is most preferable. Further, the thickness of the heat generating body 2 is, for example, about 5 to 100 μm in the case of aluminum, and particularly preferably 10 to 30 μm because both heat generation efficiency and handleability can be achieved.
また、上下のフィルム３は、発熱体本体２に接着されているが、このフィルム３としては、例えばポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリアミド（ＰＡ）等の耐熱性樹脂からなるフィルム３が使用され、特に、ポリエステルフィルム３が好ましく、厚さは数十μｍ程度である。尚、１０乃至５０μｍの二軸延伸ＰＥＴフィルム３が特に好ましい。 The upper and lower films 3 are bonded to the heating element body 2, and the film 3 is made of a heat-resistant resin such as polybutylene terephthalate (PBT), polyethylene terephthalate (PET), or polyamide (PA). A film 3 is used, in particular, a polyester film 3 is preferable, and the thickness is about several tens of μm. A biaxially stretched PET film 3 of 10 to 50 μm is particularly preferable.
そして、略中央に貫通孔を有する円盤状の積層体５は、例えば、長尺状の導電性シートの両面にフィルム３を積層したものを所定形状に打ち抜く等することにより形成される。そして、形成された積層体５を金型に入れて射出成形することで両射出成形体６，７を積層体５に一体的に装着する。いわゆるインサート成形である。この射出成形体６，７に使用される合成樹脂としては、例えば、ポリプロピレン系樹脂が使用される。尚、射出成形体６，７に使用される合成樹脂よりもフィルム３の方が耐熱性が高い。射出成形体６，７の厚さは数ｍｍ程度である。 And the disk-shaped laminated body 5 which has a through-hole in the approximate center is formed by punching what laminated | stacked the film 3 on both surfaces of the elongate electroconductive sheet, for example to a predetermined shape. Then, the formed laminate 5 is put into a mold and injection molded, so that both the injection molded bodies 6 and 7 are integrally attached to the laminate 5. This is so-called insert molding. As a synthetic resin used for the injection molded bodies 6 and 7, for example, a polypropylene resin is used. The film 3 has higher heat resistance than the synthetic resin used for the injection molded bodies 6 and 7. The thickness of the injection molded bodies 6 and 7 is about several mm.
以上のように構成された発熱体１は、例えば図３のように合成樹脂等の非導電性材料からなる容器１０に入れられて使用される。
該容器１０は、例えば、熱可塑性樹脂の射出成形や熱可塑性樹脂シートを真空、圧空で成形することにより形成され、該熱可塑性樹脂としては、例えば、ポリプロピレン、高密度ポリエチレン、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリカーボネート、ポリアミド、ポリスチレン等が使用される。特に、プロピレンエチレン共重合体等のポリプロピレン系樹脂が、軽く適度な機械的強度を有し、比較的安価で成形性も良く、適度な耐熱温度及び熱変形温度を有し総合的に優れているため、好ましいものである。但し、合成樹脂以外にも、例えば紙等の非導電性材料を使用できる。合成樹脂や紙等から容器１０を形成すれば、軽いうえに焼却廃棄も比較的容易であるため、使い捨て容器として好ましい。また、容器１０の胴部の外側に筒状のシュリンクラベル等のラベルを装着してもよい。
The heating element 1 configured as described above is used in a container 10 made of a non-conductive material such as a synthetic resin as shown in FIG.
The container 10 is formed by, for example, injection molding of a thermoplastic resin or molding a thermoplastic resin sheet by vacuum or pressure air. Examples of the thermoplastic resin include polypropylene, high-density polyethylene, polyethylene terephthalate, and polybutylene. Terephthalate, polycarbonate, polyamide, polystyrene or the like is used. In particular, polypropylene-based resins such as propylene-ethylene copolymers are light and have moderate mechanical strength, are relatively inexpensive and have good moldability, have moderate heat resistance and heat distortion temperatures, and are excellent overall. Therefore, it is preferable. However, non-conductive materials such as paper can be used in addition to the synthetic resin. Forming the container 10 from synthetic resin, paper, or the like is preferable as a disposable container because it is light and incineration disposal is relatively easy. Further, a label such as a cylindrical shrink label may be attached to the outside of the body portion of the container 10.
そして、この容器１０に発熱体１が入れられるのであるが、該発熱体１は加熱調理に際して容器１０に入れられたり、あるいは、予め容器１０に発熱体１が入れられた構造としたり、または、内容物も予め入れられて蓋によって密封された使い捨て長期保存型のものとしても使用できる。
何れにしても、積層体５の両端面５ａ，５ｂが射出成形体６，７によって覆われていて露出していないので、その端面５ａ，５ｂと内容物Ｗとが接触することがない。即ち、発熱体本体２が内容物に接触することが防止される。上述したように、内容物Ｗを入れた保存型のものにおいては、特にこの内容物Ｗが発熱体本体２に接触しないことの効果が大きい。しかも、発熱体本体２にフィルム３を接着する際の接着剤が内容物Ｗに溶出することも防止できる。また、内外両射出成形体６，７によって積層体５が補強されて発熱体１の強度が高まるので、積層体５単体に比して取り扱い性も大幅に向上する。
Then, the heating element 1 is put in the container 10, and the heating element 1 is put in the container 10 during cooking, or the heating element 1 is put in the container 10 in advance, or The contents can also be used as a disposable long-term storage type that is pre-filled and sealed with a lid.
In any case, since both end surfaces 5a and 5b of the laminate 5 are covered with the injection molded bodies 6 and 7 and are not exposed, the end surfaces 5a and 5b do not come into contact with the contents W. That is, the heating element body 2 is prevented from contacting the contents. As described above, in the case of a storage type containing the contents W, the effect that the contents W do not contact the heating element body 2 is particularly great. Moreover, it is possible to prevent the adhesive when the film 3 is bonded to the heating element body 2 from being eluted into the contents W. Moreover, since the laminated body 5 is reinforced by the inner and outer injection molded bodies 6 and 7 and the strength of the heating element 1 is increased, the handleability is greatly improved as compared with the laminated body 5 alone.
一方、図３に示す容器１０は、有底円筒状のものであって、その底部内面１０ａはフラットである。従って、発熱体１は、内外両射出成形体６，７の下面６ａ，７ａのみが容器１０の底部内面１０ａと接触し、積層体５は容器１０の底部内面１０ａよりも上方に位置する。即ち、容器１０の底部内面１０ａと積層体５との間には所定の隙間が生じる。また、射出成形体６，７の下面６ａ，７ａには溝８，９が形成されているので、その溝８，９を介して隙間に水等の内容物Ｗが浸入する。従って、内容物Ｗの加熱効率が高まるうえに、積層体５が過剰に温度上昇することも防止され、過加熱による積層体５の熱損傷が防止される。 On the other hand, the container 10 shown in FIG. 3 has a bottomed cylindrical shape, and its bottom inner surface 10a is flat. Accordingly, in the heating element 1, only the lower surfaces 6 a and 7 a of the inner and outer injection molded bodies 6 and 7 are in contact with the bottom inner surface 10 a of the container 10, and the laminate 5 is positioned above the bottom inner surface 10 a of the container 10. That is, a predetermined gap is generated between the bottom inner surface 10 a of the container 10 and the stacked body 5. Further, since the grooves 8 and 9 are formed in the lower surfaces 6a and 7a of the injection molded bodies 6 and 7, the content W such as water enters the gap through the grooves 8 and 9. Therefore, the heating efficiency of the contents W is increased and the temperature of the laminated body 5 is prevented from rising excessively, and thermal damage to the laminated body 5 due to overheating is prevented.
尚、図３に示すように、容器１０の内周面には発熱体１を係止するための突起１１が形成されている。該突起１１は全周に亘って形成しても、あるいは、周方向に間隔をおいて複数形成してもよい。また、図３のように外側の射出成形体７を突起１１で係止する構成ではなくて内側の射出成形体６を係止する構成でもよい。例えば、図４（イ）のように、容器１０の底部内面１０ａの略中央に柱部１２を上方に向けて突設し、その柱部１２の上端に径方向外側に向けて突起１３を突設し、その突起１３で内側の射出成形体６を係止してもよい。この場合も、突起１３は全周に形成しても、あるいは、図４（ロ）のように周方向に間隔をおいて複数形成してもよい。更には、図５のような係止構造を採用してもよい。即ち、柱部１２の上端に突起１４を周設し、該突起１４の周縁部に凹部１５を設ける一方、内側の射出成形体６には、その凹部１５に対応した凸部１６を中心に向けて突設し、凹部１５に凸部１６が係合するようにして発熱体１を容器１０の底部内面１０ａ上に載置した後に、その発熱体１を所定角度（例えば略９０度）回転させることで柱部１２の突起１４によって発熱体１を上方に抜けないように係止するようにしてもよい。何れにしても、発熱体１を係止する場合には、強度の大きい射出成形体６，７を係止することができるので、積層体５の損傷を防止しつつも発熱体１を確実に位置決めすることができる。
また、このように発熱体１を係止する構成の他にも、例えば、上述したような柱部１２に発熱体１の射出成形体６を螺着する構成としてもよい。
As shown in FIG. 3, a protrusion 11 for locking the heating element 1 is formed on the inner peripheral surface of the container 10. The protrusions 11 may be formed over the entire circumference, or a plurality of protrusions 11 may be formed at intervals in the circumferential direction. Moreover, the structure which latches the inner side injection molded body 6 instead of the structure which latches the outer side injection molded body 7 with the protrusion 11 like FIG. 3 may be sufficient. For example, as shown in FIG. 4 (a), a column portion 12 is projected upward at the approximate center of the bottom inner surface 10a of the container 10, and a projection 13 is projected radially outward at the upper end of the column portion 12. And the inner injection molded body 6 may be locked by the protrusion 13. Also in this case, the protrusions 13 may be formed on the entire circumference, or a plurality of protrusions 13 may be formed at intervals in the circumferential direction as shown in FIG. Furthermore, a locking structure as shown in FIG. 5 may be adopted. That is, a protrusion 14 is provided around the upper end of the column part 12 and a recess 15 is provided on the peripheral edge of the protrusion 14. After the heating element 1 is placed on the bottom inner surface 10a of the container 10 so that the protrusion 16 is engaged with the recess 15, the heating element 1 is rotated by a predetermined angle (for example, approximately 90 degrees). Thus, the heating element 1 may be locked by the protrusions 14 of the column portion 12 so as not to be pulled out upward. In any case, when the heating element 1 is locked, the injection molded bodies 6 and 7 having high strength can be locked, so that the heating element 1 can be reliably secured while preventing the laminated body 5 from being damaged. Can be positioned.
In addition to the configuration in which the heating element 1 is locked in this way, for example, the injection molded body 6 of the heating element 1 may be screwed to the column portion 12 as described above.
尚、上記実施形態では、内外両射出成形体６，７の下面６ａ，７ａにそれぞれ溝８，９を形成したが、少なくとも一方に溝を形成すれば、積層体５の下方の隙間に水等の内容物（液体）が浸入できる。また、両射出成形体６，７の下面６ａ，７ａ同士を略面一に形成したが、一方が他方よりも上方に位置するようにしてもよい。例えば、内側の射出成形体６の下面６ａが外側のそれよりも高い場合には内側から、また逆に、外側の射出成形体７の下面７ａを高くすれば外側から、それぞれ積層体５の下方に水等が浸入できる。但し、下面６ａ，７ａ同士を略面一にすると、発熱体１が安定しやすいうえに、発熱体１の変形や撓み等もより一層抑制される。
このように射出成形体６，７の構成は種々のものが採用可能であり、また、積層体５が貫通孔を有していない場合には、外側の射出成形体７のみとなる。
In the above-described embodiment, the grooves 8 and 9 are formed on the lower surfaces 6a and 7a of the inner and outer injection molded bodies 6 and 7, respectively. However, if grooves are formed on at least one side, water or the like is formed in the gap below the laminated body 5. The contents (liquid) of can penetrate. Moreover, although the lower surfaces 6a and 7a of both the injection-molded bodies 6 and 7 are formed to be substantially flush with each other, one may be positioned above the other. For example, when the lower surface 6a of the inner injection-molded body 6 is higher than that of the outer side, conversely, if the lower surface 7a of the outer injection-molded body 7 is made higher, the lower side of the laminated body 5 is lowered from the outer side. Water can enter. However, when the lower surfaces 6a and 7a are substantially flush with each other, the heating element 1 is easily stabilized and deformation and bending of the heating element 1 are further suppressed.
As described above, various configurations of the injection-molded bodies 6 and 7 can be employed, and when the laminate 5 does not have a through hole, only the outer injection-molded body 7 is provided.
また、以上の説明では、発熱体本体２をフィルム３と射出成形体６，７の双方で覆う構成であったが、発熱体本体２の全体を射出成形体によって覆う構成としてもよい。例えば、図６のように、略中央に貫通孔を有する発熱体本体２の全面を射出成形体２０によって覆う。この射出成形体２０も上述したのと同様に射出成形により発熱体本体２と一体化されている。尚、この発熱体１にあっては、その射出成形体２０の下面２０ａの周縁部に下方に向けて周壁部２１を突設させており、これにより、発熱体１の下方に隙間が発生するようにしている。
また更に、発熱体１の形状も円盤状に限られず角形の板状であってもよく、容器１０の底部内面１０ａの形状に合わせることが好ましい。
In the above description, the heating element body 2 is covered with both the film 3 and the injection molded bodies 6 and 7. However, the entire heating element body 2 may be covered with the injection molding body. For example, as shown in FIG. 6, the entire surface of the heating element body 2 having a through hole at the substantially center is covered with the injection molded body 20. This injection molded body 20 is also integrated with the heat generating body main body 2 by injection molding as described above. In addition, in this heat generating body 1, the peripheral wall part 21 is protruded and provided in the peripheral part of the lower surface 20a of the injection molding body 20 below, and, thereby, a clearance gap generate | occur | produces under the heat generating body 1. I am doing so.
Furthermore, the shape of the heating element 1 is not limited to a disk shape but may be a square plate shape, and is preferably matched to the shape of the bottom inner surface 10 a of the container 10.
１…発熱体、２…発熱体本体、３…フィルム、４…貫通孔、５…積層体、６，７…射出成形体、８，９…溝、２０…射出成形体 DESCRIPTION OF SYMBOLS 1 ... Heat generating body, 2 ... Heat generating body main body, 3 ... Film, 4 ... Through-hole, 5 ... Laminated body, 6, 7 ... Injection molded object, 8, 9 ... Groove, 20 ... Injection molded object
Claims (3)
電磁誘導で発熱する導電性シートからなる発熱体本体の両面には各面を覆うようにそれぞれ合成樹脂製のフィルムが積層され、
発熱体本体及び両フィルムからなる積層体の端面が、射出成形により積層体に装着された合成樹脂製の射出成形体で覆われており、
射出成形体は、積層体よりも厚肉であって且つ積層体の下面よりも下方に突出していることを特徴とする誘導加熱調理用の発熱体。 In a heating element for induction heating cooking that generates heat by electromagnetic induction in a container made of a non-conductive material,
Synthetic resin films are laminated on both sides of the heating element body consisting of a conductive sheet that generates heat by electromagnetic induction so as to cover each surface.
The heating element body and the end face of the laminate composed of both films are covered with an injection-molded product made of synthetic resin attached to the laminate by injection molding ,
The heating element for induction heating cooking, wherein the injection-molded body is thicker than the laminate and protrudes downward from the lower surface of the laminate .
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| JP2007020488A (en) * | 2005-07-19 | 2007-02-01 | Toyo Seikan Kaisha Ltd | Method for producing aseptic packaged boiled rice |
| JP2007135883A (en) * | 2005-11-18 | 2007-06-07 | Matsushita Electric Ind Co Ltd | Rice cooker |
| WO2007071568A1 (en) * | 2005-12-20 | 2007-06-28 | Arcelik Anonim Sirketi | A cooking container for induction heaters |
| WO2010080901A2 (en) * | 2009-01-07 | 2010-07-15 | MNML, Inc. | Induction heating apparatus with suspended induction plate |
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