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JP2011200727A - Method for manufacturing rice cooker and warmer - Google Patents

Method for manufacturing rice cooker and warmer
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Publication number
JP2011200727A
JP2011200727AJP2011157400AJP2011157400AJP2011200727AJP 2011200727 AJP2011200727 AJP 2011200727AJP 2011157400 AJP2011157400 AJP 2011157400AJP 2011157400 AJP2011157400 AJP 2011157400AJP 2011200727 AJP2011200727 AJP 2011200727A
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aluminum
inner pot
induction heating
main body
protective frame
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Makoto Okazaki
誠 岡崎
Toshiaki Suzuki
利明 鈴木
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Hitachi Global Life Solutions Inc
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Hitachi Appliances Inc
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Abstract

Translated fromJapanese

【課題】電磁誘導加熱式のジャー炊飯器において、誘導加熱の発熱効率を高め、電磁誘導加熱性能の向上を図るとともに、安価に製造できる内釜を提供する。
【解決手段】本体1と、該本体1の内壁を構成する保護枠3と、該保護枠3内に着脱自在に収納される内釜4と、前記保護枠3の外側に配置され内釜4を誘導加熱する底面加熱コイル5と、前記本体1及び内釜4の上面開口部を塞ぐ外蓋2とを備えたジャー炊飯器の製造方法において、前記内釜4を内側がアルミニウム板7、外側がアルミメッキ鋼板10よりなるクラッド材で構成し、前記アルミメッキ鋼板の外側面に施されたアルミメッキ層にブラストショットした後のアルミメッキ層の厚さを20μ以上とした。
【選択図】 図1
In an electromagnetic induction heating type jar rice cooker, an inner pot that can be manufactured at low cost while improving the heat generation efficiency of induction heating and improving electromagnetic induction heating performance is provided.
A main body, a protective frame that constitutes an inner wall of the main body, an inner hook that is detachably housed in the protective frame, and an inner hook that is disposed outside the protective frame. In the method of manufacturing a jar rice cooker comprising a bottom surface heating coil 5 for induction heating and an outer lid 2 for closing the upper surface opening of the main body 1 and the inner pot 4, the inner pot 4 has an aluminum plate 7 on the inner side and an outer side. Is made of a clad material made of an aluminum-plated steel plate 10, and the thickness of the aluminum-plated layer after blasting the aluminum-plated layer applied to the outer surface of the aluminum-plated steel plate is 20 μm or more.
[Selection] Figure 1

Description

Translated fromJapanese

本発明は、電磁誘導加熱により内釜を発熱させて炊飯を行うジャー炊飯器の製造方法に関するものである。  The present invention relates to a method of manufacturing a jar rice cooker that cooks rice by heating an inner pot by electromagnetic induction heating.

電磁誘導加熱式のジャー炊飯器は、内釜の素材として、外側に誘導加熱コイルにより誘導加熱される磁性材料を用い、内側には誘導加熱により発熱した磁性材料からの熱が内釜内部の米に均一に伝えられるように熱伝導性の良い材料を用いることが一般的であり、それらの素材として、特許文献1に示すように、外側をステンレス板、内側をアルミニウム板としたクラッド材を内鍋形状に絞り加工したものが多く用いられている。  The electromagnetic induction heating type jar rice cooker uses a magnetic material that is induction heated by an induction heating coil on the outside as the material of the inner pot, and heat from the magnetic material generated by induction heating on the inside is the rice inside the inner pot. It is common to use materials with good thermal conductivity so that they can be evenly transmitted to them. As shown in Patent Document 1, a clad material with a stainless steel plate on the outside and an aluminum plate on the inside is used. Many are drawn into a pot shape.

また、特許文献2に示すように、内鍋形状をなす受型の底面に磁性金属材料である皿状のステンレス板等を敷き、その上に非磁性金属材料である溶融アルミニウムを注入し、その上から押型により高圧で加圧して内鍋を成形したものもある。  Moreover, as shown in Patent Document 2, a dish-shaped stainless steel plate or the like, which is a magnetic metal material, is laid on the bottom surface of a receiving mold having an inner pot shape, and molten aluminum, which is a nonmagnetic metal material, is injected thereon, There is also a type in which an inner pan is molded by pressing from above with high pressure.

さらに、誘導加熱の高効率化を図るために、特許文献3に示すように、アルミニウム板を絞り加工した内釜の外側底面部に電磁誘導加熱効率の最も良い鉄を溶射し、さらに、鉄溶射面の錆びを防止するために、鉄溶射面を覆うようにアルミニウムを溶射したものもある。  Furthermore, in order to increase the efficiency of induction heating, as shown in Patent Document 3, iron having the best electromagnetic induction heating efficiency is thermally sprayed on the outer bottom surface portion of the inner pot in which an aluminum plate is drawn, and further, iron spraying is performed. In order to prevent rusting of the surface, there is also one in which aluminum is sprayed so as to cover the iron sprayed surface.

特開平5−199934号公報JP-A-5-199934特開平8−24123号公報JP-A-8-24123特開2003−290022号公報JP 2003-290022 A

上記した電磁誘導加熱式のジャー炊飯器においては、内釜の発熱部に発熱効率の最も良い鉄を用いるのが理想であるが、内釜は常に水周りで使用されるため、防錆上の課題があり、上記したように、特許文献1,2,3等に示すように内側に非磁性材料を用い、外側に磁性材料を用いている。  In the above-mentioned electromagnetic induction heating type jar rice cooker, it is ideal to use the iron with the best heat generation efficiency for the heat generating part of the inner pot, but since the inner pot is always used around water, There is a problem, and as described above, a nonmagnetic material is used on the inner side and a magnetic material is used on the outer side as shown in Patent Documents 1, 2, 3, and the like.

それらの中で、現在主流となっている特許文献1に示すものは、外側をステンレス板、内側をアルミニウム板としたクラッド材を用いて内鍋形状に絞り加工するだけであるため、内釜の加工費が安いという利点はあるが、磁性体であるステンレス板の発熱効率が78%程度と、強磁性体である鉄の84%程度に比べて低いという欠点がある。  Among them, what is shown in Patent Document 1, which is currently mainstream, is only drawn into an inner pot shape using a clad material with a stainless steel plate on the outside and an aluminum plate on the inside. Although there is an advantage that the processing cost is low, there is a drawback that the heat generation efficiency of the stainless steel plate, which is a magnetic material, is about 78%, which is lower than about 84% of iron, which is a ferromagnetic material.

また、特許文献2に示すものは、実際に製造するに当っては、磁性金属材料が高圧溶融鍛造に耐える強度が必要であるため、強い磁性体である鉄が使用できず、ステンレス板に限定されてしまい、このため上記特許文献1と同様発熱効率が悪いという欠点がある。  In addition, in the actual production of the one shown in Patent Document 2, since the magnetic metal material needs to have a strength that can withstand high-pressure melt forging, iron that is a strong magnetic material cannot be used, and is limited to a stainless steel plate. For this reason, there is a drawback that the heat generation efficiency is poor as in the above-mentioned Patent Document 1.

また、内鍋の形状によっては、皿状のステンレス板がアルミニウム材から剥がれる心配があり、さらに高圧溶融鍛造であるため、生産コストが多大で安価に消費者に提供できないという欠点がある。  Further, depending on the shape of the inner pot, there is a concern that the dish-shaped stainless steel plate may be peeled off from the aluminum material, and further, since it is high-pressure melt forging, there is a disadvantage that the production cost is great and cannot be provided to consumers at low cost.

さらに、特許文献3に示すものは、鉄溶射後の溶射面に無数の粗い凹凸が形成されるため、そのままの状態ではシンク等を傷つける恐れがあり、鉄溶射した後研磨し、その上にアルミニウムを溶射し、さらに溶射後、その溶射面を研磨する必要があり、クラッド材に比べて加工費がアップする欠点がある。  Furthermore, in the one shown in Patent Document 3, innumerable rough irregularities are formed on the sprayed surface after iron spraying, so there is a risk of damaging the sink or the like as it is. After spraying, it is necessary to polish the sprayed surface, and there is a drawback that the processing cost is increased as compared with the clad material.

また、溶射は膜厚管理が難しく、膜厚管理の代わりに溶射の重量管理を行うと、目標値に対して約1割の重量バラツキが発生し、電磁誘導加熱の発熱量、即ち製品の消費電力に誤差が生じやすくなる。  In addition, it is difficult to manage the film thickness by spraying, and if weight management of spraying is performed instead of film thickness management, a weight variation of about 10% of the target value occurs, and the heat generation amount of electromagnetic induction heating, that is, product consumption. An error is likely to occur in the power.

さらに、近年は、米の均一加熱性を高めるため内釜の側面部にも誘導加熱コイルを設けることもあり、内釜の側面まで鉄溶射をするとさらに加工費がアップしてしまう。  Further, in recent years, in order to improve the uniform heating property of rice, an induction heating coil is sometimes provided on the side portion of the inner pot, and if the thermal spraying is performed to the side surface of the inner pot, the processing cost is further increased.

本発明は上記の課題を解決するためになされたものであり、請求項1では、本体と、該本体の内壁を構成する保護枠と、該保護枠内に着脱自在に収納される内釜と、前記保護枠の外側に配置され内釜を誘導加熱する誘導加熱コイルと、前記本体及び内釜の上面開口部を塞ぐ外蓋とを備えたジャー炊飯器の製造方法であって、前記内釜は、アルミニウム板とアルミメッキ鋼板をクラッドし、そのクラッド材を前記アルミニウム板が内側に位置し、アルミメッキ鋼板が外側に位置するように内釜形状に絞り加工し、その後、内釜の内面をブラストショット処理し、その表面にプライマーを塗装し、プライマーの上にフッ素樹脂を塗装し、その後、内釜の外側面にブラストショットしてその表面に防錆力のある耐熱塗料を塗装したものであり、前記アルミメッキ鋼板の外側面に施されたアルミメッキ層にブラストショットした後の前記アルミメッキ鋼板のアルミメッキ層の厚さは20μ以上であるものである。  The present invention has been made to solve the above-mentioned problems. In claim 1, the main body, a protective frame constituting the inner wall of the main body, and an inner hook removably accommodated in the protective frame, A method for producing a jar rice cooker, comprising: an induction heating coil disposed outside the protective frame for induction heating of the inner pot; and an outer lid for closing the upper surface opening of the main body and the inner pot. Is clad between an aluminum plate and an aluminum-plated steel plate, and the clad material is drawn into an inner hook shape so that the aluminum plate is located on the inner side and the aluminum-plated steel plate is located on the outer side. Blast shot treatment, primer is coated on the surface, fluororesin is coated on the primer, then blast shot is applied to the outer surface of the inner pot, and the surface is coated with heat-resistant paint with anti-corrosive power. Yes, said The thickness of the aluminized layer of the aluminum-plated steel sheet after the blasting shot aluminized layer applied on the outer surface of the Rumimekki steel sheet is not more than 20 [mu].

本発明の請求項1によれば、内釜を内側のアルミニウム板と外側のアルミメッキ鋼板のクラッド材とすることにより、アルミメッキ鋼板が強磁性体であるため、誘導加熱の発熱効率が高く、電磁誘導加熱性能の向上が図れるものである。  According to claim 1 of the present invention, since the inner pot is a clad material of the inner aluminum plate and the outer aluminum plated steel plate, the aluminum plated steel plate is a ferromagnetic material, so the heat generation efficiency of induction heating is high, The electromagnetic induction heating performance can be improved.

また、加工コストも従来のアルミニウム板とステンレス板のクラッド材と同等であり、安価に製造できるものである。  Further, the processing cost is equivalent to that of a conventional clad material made of an aluminum plate and a stainless steel plate, and can be manufactured at low cost.

また、上記のようにクラッド材とすることにより、鉄溶射に比べて重量バラツキが抑えられ、電磁誘導加熱の発熱量、即ち、消費電力の誤差がなくなり、消費電力の管理も容易となるものである。  In addition, by using the clad material as described above, variation in weight can be suppressed as compared with iron spraying, and the amount of heat generated by electromagnetic induction heating, that is, power consumption error can be eliminated, and power consumption can be easily managed. is there.

さらに、内釜の外側面はアルミメッキ層で覆われているため、鉄錆の心配もない。  Furthermore, since the outer surface of the inner pot is covered with an aluminum plating layer, there is no fear of iron rust.

また、内釜の外側面全体が鉄板で覆われているため、側面加熱も十分にでき、米の均一加熱が図れる。  Moreover, since the entire outer surface of the inner pot is covered with an iron plate, the side surface can be heated sufficiently, and the rice can be heated uniformly.

本発明のジャー炊飯器の縦断面図である。It is a longitudinal cross-sectional view of the jar rice cooker of this invention.

以下本発明の一実施例を図1により説明する。  An embodiment of the present invention will be described below with reference to FIG.

図1において、ジャー炊飯器の本体1の内側には上面が開口した保護枠3が設けられ、その保護枠3内には内釜4が着脱自在に収納されている。  In FIG. 1, a protective frame 3 having an open upper surface is provided inside a main body 1 of a jar rice cooker, and an inner pot 4 is detachably accommodated in the protective frame 3.

本体1の上面には、外蓋2が開閉自在に取付けられ、本体1と内釜4の上面開口部を塞いでいる。  An outer lid 2 is attached to the upper surface of the main body 1 so as to be openable and closable, and closes the upper surface openings of the main body 1 and the inner hook 4.

前記保護枠3の外側底面部と外側側面部には、内釜4の底面部を誘導加熱する底面加熱コイル5と側面部を誘導加熱する側面加熱コイル6が設けられている。  A bottom heating coil 5 for induction heating the bottom surface of the inner pot 4 and a side heating coil 6 for induction heating the side surface are provided on the outer bottom surface and the outer side surface of the protective frame 3.

前記内釜4は、厚さ1.8mmのアルミニウム板7と、厚さ0.5mmの鉄板8の両面に少なくとも30μ以上の厚さでアルミメッキ層9を施したアルミメッキ鋼板10をクラッドし、そのクラッド材を前記アルミニウム板7が内釜4の内側に位置し、アルミメッキ鋼板10が外側に位置するように内釜形状に絞り加工し、その後、内釜4の内面をブラストショット処理し、その表面にプライマー11を塗装し、プライマー11の上にフッ素樹脂12を塗装する。その後、内釜4の外側面にブラストショットしてその表面にシリコン樹脂等の防錆力のある耐熱塗料13を塗装する。  The inner hook 4 is clad with an aluminum platedsteel plate 10 having an aluminum plating layer 9 applied to both surfaces of an aluminum plate 7 having a thickness of 1.8 mm and an iron plate 8 having a thickness of 0.5 mm. The clad material is drawn into an inner hook shape so that the aluminum plate 7 is positioned inside the inner pot 4 and the aluminum-platedsteel plate 10 is positioned outside, and then the inner surface of the inner pot 4 is blast shot processed, Primer 11 is coated on the surface, and fluororesin 12 is coated on primer 11. Thereafter, a blast shot is performed on the outer surface of the inner pot 4 and a heat-resistant paint 13 having a rust-proofing power such as silicon resin is applied to the surface.

上記構成からなる本実施例の作用について説明する。  The operation of this embodiment having the above configuration will be described.

図1において、まず、使用者が内釜4内に適量の米と水を入れ、本体1内に収納して外蓋2を閉じる。  In FIG. 1, first, the user puts an appropriate amount of rice and water into the inner pot 4, accommodates the main body 1, and closes the outer lid 2.

次に、操作手段(図示せず)を操作して炊飯を開始すると、底面加熱コイル5及び側面加熱コイル6に電流が流れ、交番磁界が発生して該加熱コイル5,6と対面したアルミメッキ鋼板10の鉄板8に渦電流が流れ、その渦電流によるジュール熱で電磁誘導加熱が起こる。そして、鉄板8で発生した熱は熱伝導の良いアルミニウム板7を介して内釜4内部の米と水に伝えられ炊飯が行われる。  Next, when rice is cooked by operating the operating means (not shown), an electric current flows through the bottom surface heating coil 5 and the side surface heating coil 6, an alternating magnetic field is generated, and the aluminum plating facing the heating coils 5, 6 An eddy current flows through the iron plate 8 of thesteel plate 10, and electromagnetic induction heating occurs due to Joule heat generated by the eddy current. And the heat which generate | occur | produced in the iron plate 8 is transmitted to the rice and water inside the inner pot 4 through the aluminum plate 7 with good heat conduction, and rice cooking is performed.

やがて、米が水を吸って内釜4内の水がなくなると、内釜4の底部の温度が急上昇し、それを温度検知手段(図示せず)が検知して底面加熱コイル5及び側面加熱コイル6への通電を停止し、加熱が終了する。その後、一定時間蒸らしを行って炊飯が終了する。  Eventually, when the rice sucks water and the water in the inner pot 4 runs out, the temperature at the bottom of the inner pot 4 suddenly rises, and this is detected by a temperature detecting means (not shown), and the bottom heating coil 5 and the side surface heating. The energization to the coil 6 is stopped and the heating is finished. After that, steaming is performed for a certain period of time, and cooking is completed.

そして、上記炊飯器において、本発明では、内釜4をアルミニウム板7と鉄板8の両面にアルミメッキ層9を施したアルミメッキ鋼板10のクラッド材を用いることにより、内釜4の全面に強磁性体で最も誘導加熱の発熱効率が良い鉄層が形成されることになり、これによって、電磁誘導加熱の発熱効率が向上し、電磁誘導加熱性能の向上が図れるものである。  In the rice cooker, in the present invention, the inner pot 4 is made strong on the entire surface of the inner pot 4 by using the clad material of the aluminum-platedsteel sheet 10 in which the aluminum plating layer 9 is provided on both surfaces of the aluminum plate 7 and the iron plate 8. An iron layer having the highest heat generation efficiency of induction heating is formed of a magnetic material, and this improves the heat generation efficiency of electromagnetic induction heating and improves the electromagnetic induction heating performance.

また、内釜4の底面部を誘導加熱する底面加熱コイル5と側面部を誘導加熱する側面加熱コイル6の両方に対しても対応できるため、米の均一加熱性の向上が図れるものである。  Moreover, since it can respond also to both the bottom face heating coil 5 which induction-heats the bottom face part of the inner pot 4, and the side surface heating coil 6 which induction heats a side part, the improvement of the uniform heating property of rice can be aimed at.

さらに、鉄板8は蓄熱性があり、全周面に鉄層を設けることにより、保温時の放熱量も少なく、省エネ効果にもつながるものである。  Furthermore, the iron plate 8 has heat storage properties, and by providing an iron layer on the entire circumferential surface, the amount of heat released during heat retention is small, leading to an energy saving effect.

また、アルミメッキ層9が施されている内釜4の外側面の見栄えをさらに良くするために、その外側面に塗装を施す場合には、塗装前に塗装の密着性をあげるため外側面をブラストショットして粗くした後、塗装を施すものであるが、ブラストショットの粗さは5〜10μ程度であり、本発明ではアルミメッキ層は30μ以上確保されており、ブラストショットしても20μ以上のアルミメッキ層が確保されるため、鉄錆の心配もない。  In addition, in order to improve the appearance of the outer surface of the inner pot 4 on which the aluminum plating layer 9 is applied, when the outer surface is coated, the outer surface is used to increase the adhesion of the coating before coating. The blast shot is roughened and then coated, but the roughness of the blast shot is about 5 to 10 μm. In the present invention, the aluminum plating layer is secured to 30 μm or more, and even when blast shot is performed, 20 μm or more Because there is no aluminum plating layer, there is no worry about iron rust.

さらに、内釜4は、アルミニウム板7と鉄板8の両面にアルミメッキ層9を施したアルミメッキ鋼板10のクラッド材を内釜形状に絞り、その後、内釜4の内側面と外側面の塗装工程となるので、従来の溶射内釜のように加工工程数が増加したり、高圧溶融鍛造釜のように、生産コストが多大となることがない。  Further, the inner hook 4 is made of a clad material made of an aluminum-platedsteel plate 10 having an aluminum plating layer 9 on both sides of an aluminum plate 7 and an iron plate 8, and then the inner hook and the outer side of the inner pot 4 are painted. Therefore, the number of processing steps does not increase as in the conventional sprayed inner pot, and the production cost does not increase as in the high pressure fusion forging pot.

なお、上記実施例では、内釜4のクラッド材として、厚さ1.8mmのアルミニウム板7と、厚さ0.5mmの鉄板8を用いたが、これは内釜4の絞り加工や重量等を考慮した一実施例であり、必ずしもこの板厚に限定されるものではなく、適宜選定することができる。  In the above-described embodiment, the aluminum plate 7 having a thickness of 1.8 mm and the iron plate 8 having a thickness of 0.5 mm are used as the clad material of the inner hook 4. In consideration of the above, it is not necessarily limited to the plate thickness, and can be appropriately selected.

1 本体
2 外蓋
3 保護枠
4 内釜
5 底面加熱コイル
6 側面加熱コイル
7 アルミニウム板
8 鉄板
9 アルミメッキ層
10 アルミメッキ鋼板
11 プライマー
12 フッ素樹脂
13 耐熱塗料
DESCRIPTION OF SYMBOLS 1 Main body 2 Outer lid 3 Protective frame 4 Inner hook 5 Bottom heating coil 6 Side heating coil 7 Aluminum plate 8 Iron plate 9Aluminum plating layer 10 Aluminum plating steel plate 11 Primer 12 Fluoro resin 13 Heat resistant paint

Claims (1)

Translated fromJapanese
本体と、該本体の内壁を構成する保護枠と、該保護枠内に着脱自在に収納される内釜と、前記保護枠の外側に配置され内釜を誘導加熱する誘導加熱コイルと、前記本体及び内釜の上面開口部を塞ぐ外蓋とを備えたジャー炊飯器の製造方法であって、
前記内釜は、アルミニウム板とアルミメッキ鋼板をクラッドし、そのクラッド材を前記アルミニウム板が内側に位置し、アルミメッキ鋼板が外側に位置するように内釜形状に絞り加工し、その後、内釜の内面をブラストショット処理し、その表面にプライマーを塗装し、プライマーの上にフッ素樹脂を塗装し、その後、内釜の外側面にブラストショットしてその表面に防錆力のある耐熱塗料を塗装したものであり、
前記アルミメッキ鋼板の外側面に施されたアルミメッキ層にブラストショットした後の前記アルミメッキ層の厚さは20μ以上であることを特徴とするジャー炊飯器の製造方法。
A main body, a protective frame that constitutes an inner wall of the main body, an inner hook that is detachably housed in the protective frame, an induction heating coil that is disposed outside the protective frame and induction-heats the inner hook, and the main body And a method of manufacturing a jar rice cooker comprising an outer lid that closes the upper surface opening of the inner pot,
The inner pot is clad between an aluminum plate and an aluminum plated steel plate, and the clad material is drawn into an inner pot shape so that the aluminum plate is located on the inner side and the aluminum plated steel plate is located on the outer side. The inner surface of the blast is shot, the primer is painted on the surface, the fluororesin is painted on the primer, and then the outer surface of the inner pot is blast-shot and the surface is coated with a heat-resistant paint with anti-corrosive power. And
The method of manufacturing a jar rice cooker, wherein the thickness of the aluminum plating layer after blasting the aluminum plating layer applied to the outer surface of the aluminum plating steel sheet is 20 μm or more.
JP2011157400A2011-07-192011-07-19Method for manufacturing rice cooker and warmerPendingJP2011200727A (en)

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