JP7315608B2 - heating cooker - Google Patents

heating cooker Download PDF

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JP7315608B2
JP7315608B2 JP2021044469A JP2021044469A JP7315608B2 JP 7315608 B2 JP7315608 B2 JP 7315608B2 JP 2021044469 A JP2021044469 A JP 2021044469A JP 2021044469 A JP2021044469 A JP 2021044469A JP 7315608 B2 JP7315608 B2 JP 7315608B2
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cooking chamber
heater
heating cooker
heat
contact
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JP2022143775A (en
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万由子 福岡
直樹 和田
真人 関
満 本間
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Hitachi Global Life Solutions Inc
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Hitachi Global Life Solutions Inc
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/04—Stoves or ranges heated by electric energy with heat radiated directly from the heating element

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Electric Stoves And Ranges (AREA)
  • Baking, Grill, Roasting (AREA)

Description

本発明は、グリルユニットを内蔵した加熱調理器に関する。 TECHNICAL FIELD The present invention relates to a heating cooker incorporating a grill unit.

従来の誘導加熱調理器（ＩＨクッキングヒーター）には、焼き魚等の調理時に使用するグリルユニットを内蔵したものがある。グリルユニットを使用して焼き魚等を調理すると、油煙等で調理庫内が汚れるため、調理庫内を適時清掃する必要がある。調理庫内の清掃性を高めるため、近年では、調理庫の底面を平坦にし、平坦な底面の下方に下ヒーターを配置することで、下ヒーターへの油煙等の付着を防ぎ、かつ、調理庫底面を清掃し易くした加熱調理器が提案されている。 Some conventional induction heating cookers (IH cooking heaters) incorporate a grill unit used for cooking grilled fish or the like. When grilled fish or the like is cooked using the grill unit, the inside of the cooking chamber becomes dirty with oily smoke and the like, so it is necessary to clean the inside of the cooking chamber from time to time. In order to improve the cleanability of the inside of the cooking chamber, in recent years, a heating cooker has been proposed in which the bottom surface of the cooking chamber is flattened and the lower heater is arranged below the flat bottom surface to prevent oily smoke from adhering to the lower heater and make the bottom surface of the cooking chamber easy to clean.

例えば、特許文献１の段落００３８には、「加熱調理器１内には、調理室３の底面より下方に位置するヒーター６が備えられており、ヒーター６の熱により、調理室３の底面が加熱され、さらに調理室３の底面からの熱伝導および輻射熱により受け皿４が加熱され、そこからの熱伝導により調理物２が加熱される構成となっている。」との説明があり、また、同文献の図１４には、調理室底面の下面に平面ヒーターを接触させた加熱調理器が開示されている。 For example, in paragraph 0038 of Patent Document 1, there is an explanation that ``the heating cooker 1 is provided with a heater 6 positioned below the bottom surface of the cooking chamber 3, and the bottom surface of the cooking chamber 3 is heated by the heat of the heater 6, and furthermore, the saucer 4 is heated by heat conduction and radiant heat from the bottom surface of the cooking chamber 3, and the heat conduction from there heats the food 2 to be cooked.'' A cooker is disclosed.

特開２０１２－２２０１４６号公報JP 2012-220146 A

特許文献１の図１４の加熱調理器のように、調理室底面の下面に平面ヒーターを接触させた構造にすれば、平面ヒーターの熱を効率よく調理室底面に伝達できるため、受け皿への熱伝導と輻射熱の効率を高めることができる。 As in the heating cooker in FIG. 14 of Patent Document 1, if the flat heater is in contact with the lower surface of the bottom surface of the cooking chamber, the heat of the flat heater can be efficiently transmitted to the bottom surface of the cooking chamber, so that the heat conduction to the saucer and the efficiency of radiant heat can be improved.

しかしながら、平面ヒーターの発熱量をより大きくしたい場合には、より高温となった調理室底面が熱応力で変形し、調理室底面と平面ヒーターの密着性が悪化する虞がある。調理室底面と平面ヒーターの間に隙間が生じると、隙間の近傍では平面ヒーターから調理室への熱伝導の効率が劣化し、調理室から受け皿への熱輻射の効率も劣化する。そして、このような熱伝導効率や熱輻射効率の劣化が発生すると、平面ヒーターの発熱量をより大きくしても、調理を適切に実行できない可能性があった。 However, when it is desired to increase the amount of heat generated by the planar heater, the bottom surface of the cooking chamber, which has reached a higher temperature, may be deformed by thermal stress, and the adhesion between the bottom surface of the cooking chamber and the planar heater may deteriorate. If a gap is formed between the bottom surface of the cooking chamber and the planar heater, the efficiency of heat conduction from the planar heater to the cooking chamber is degraded in the vicinity of the gap, and the efficiency of heat radiation from the cooking chamber to the tray is also degraded. When such deterioration in heat conduction efficiency and heat radiation efficiency occurs, there is a possibility that even if the heat generation amount of the flat heater is increased, it may not be possible to properly perform cooking.

そこで、本発明では、調理庫底面と下ヒーターを接触させたグリルユニット構造を採用する場合、調理庫底面の熱変形を抑制することで、調理庫底面と平面ヒータの密着性を維持し、下ヒーターから調理庫底面への熱伝導効率、および、調理庫底面から調理容器への輻射熱効率の劣化を抑制することができる加熱調理器を提供することを目的とする。 Therefore, the object of the present invention is to provide a heating cooker capable of suppressing thermal deformation of the bottom surface of the cooking chamber and maintaining close contact between the bottom surface of the cooking chamber and the flat heater when adopting a grill unit structure in which the bottom surface of the cooking chamber and the lower heater are in contact with each other, and suppressing deterioration of the efficiency of heat conduction from the lower heater to the bottom surface of the cooking chamber and the efficiency of radiant heat from the bottom surface of the cooking chamber to the cooking container.

上記課題を解決するため、本発明の加熱調理器は、被調理物を収納する調理庫と、該調理庫の前面開口を開閉するドアと、前記調理庫の底面の下面に接触配置した下ヒーターと、を具備し、前記調理庫の底面の上面には、畝状の凸部と、該凸部より低い凹部が設けられており、該凹部の下面と前記下ヒーターが接触しているものとした。 In order to solve the above-mentioned problems, the heating cooker of the present invention includes a cooking chamber for storing food to be cooked, a door for opening and closing the front opening of the cooking chamber, and a lower heater arranged in contact with the lower surface of the bottom surface of the cooking chamber.

本発明の加熱調理器によれば、調理庫底面と下ヒーターを接触させたグリルユニット構造を採用する場合、調理庫底面の熱変形を抑制し、することで、調理庫底面と平面ヒータの密着性を維持し、下ヒーターから調理庫底面への熱伝導効率、および、調理庫底面から調理容器への輻射熱効率の劣化を抑制することができる。 According to the heating cooker of the present invention, when adopting a grill unit structure in which the bottom surface of the cooking chamber and the lower heater are in contact with each other, thermal deformation of the bottom surface of the cooking chamber is suppressed, thereby maintaining the adhesion between the bottom surface of the cooking chamber and the flat heater.

一実施例の加熱調理器をシステムキッチンに組み込んだ状態を示す外観斜視図。1 is an external perspective view showing a state in which a heating cooker of one embodiment is incorporated in a system kitchen; FIG. 一実施例のグリルユニットの外観斜視図。1 is an external perspective view of a grill unit of one embodiment; FIG. 一実施例のグリルユニットの縦断面図。1 is a longitudinal sectional view of a grill unit of one embodiment; FIG. 一実施例のグリルユニットの調理庫底面を上面視した平面図。The top view which looked at the bottom of the cooking chamber of the grill unit of one Example. 図４の調理庫底面の図示を省略した透視平面図。The perspective plan view which abbreviate|omitted illustration of the cooking chamber bottom of FIG. 図４の調理庫底面への凹凸形成方法を説明するための拡大断面図。FIG. 5 is an enlarged cross-sectional view for explaining a method of forming unevenness on the bottom surface of the cooking chamber in FIG. 4 ;

以下、図１から図６を用いて、本発明の一実施例に係る加熱調理器を説明する。 A heating cooker according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG.

図１は、本発明の一実施例に係る加熱調理器１０を、システムキッチンに組み込んだ状態を示す外観斜視図である。なお、図１に例示する加熱調理器１０は、ビルトイン型のＩＨクッキングヒーターであるが、据え置き型のＩＨクッキングヒーターに本発明を適用しても良い。 FIG. 1 is an external perspective view showing a state in which a heating cooker 10 according to one embodiment of the present invention is incorporated in a system kitchen. The heating cooker 10 illustrated in FIG. 1 is a built-in type IH cooking heater, but the present invention may be applied to a stationary IH cooking heater.

＜加熱調理器１０＞
本実施例の加熱調理器１０は、本体１１の左前面に、焼き魚等の調理時に使用するグリルユニット２０を備えている。また、本体１１の上面には、耐熱性の高い素材、例えば、結晶化ガラスなどのトッププレート１２が載置されている。トッププレート１２の上面には、複数の鍋載置部１３（１３ａ、１３ｂ、１３ｃ）が設けられ、金属鍋等の被加熱物の載置場所を表示している。鍋載置部１３の夫々の下方には、加熱コイル１４（１４ａ、１４ｂ、１４ｃ）が設けられている。これらの加熱コイル１４は、インバータ回路からの高周波電流を印加して高周波磁界を発生させ、鍋載置部１３に載置された金属鍋等を誘導加熱する。トッププレート１２の上面手前側には、主に加熱コイル１４を制御するための上面操作部１５が設けられている。本体１１の前面右側には、主にグリルユニット２０を制御するための前面操作部１６が設けられている。 <heat cooker 10>
The heating cooker 10 of this embodiment has a grill unit 20 on the left front surface of the main body 11 for use when cooking grilled fish or the like. A top plate 12 made of a highly heat-resistant material such as crystallized glass is placed on the upper surface of the main body 11 . A plurality of pot placement portions 13 (13a, 13b, 13c) are provided on the upper surface of the top plate 12 to indicate the placement locations of objects to be heated such as metal pots. Heating coils 14 ( 14 a , 14 b , 14 c ) are provided below each of the pot rests 13 . These heating coils 14 apply a high-frequency current from an inverter circuit to generate a high-frequency magnetic field, thereby induction-heating a metal pot or the like placed on the pot mounting portion 13 . A top operation unit 15 for mainly controlling the heating coil 14 is provided on the front side of the top surface of the top plate 12 . A front operation section 16 for mainly controlling the grill unit 20 is provided on the front right side of the main body 11 .

＜グリルユニット２０＞
図２は、グリルユニット２０の構成を説明するための外観斜視図である。ここでは、構成を分かりやすく説明するため、グリルユニット２０の前面のドア２１を取り外し、さらに、内部構造物を引き出した状態を図示している。ここに示すように、グリルユニット２０は、前方が開口した箱状の調理庫２２と、魚、肉、ピザなどの食材（被調理物）を載せる深皿状のグリルパン２３と、グリルパン２３を載置する網状のグリルパンホルダ２４と、グリルパンホルダ２４を手前側に引き出したり調理庫２２内に戻したりするためのレール２５を有している。なお、このレール２５の手前側には、調理庫２２の前面開口２２ａを塞ぐためのドア２１（図１参照）が取り付けられる。 <Grill unit 20>
FIG. 2 is an external perspective view for explaining the configuration of the grill unit 20. As shown in FIG. Here, in order to explain the configuration in an easy-to-understand manner, the front door 21 of the grill unit 20 is removed and the internal structure is drawn out. As shown here, the grill unit 20 has a box-shaped cooking chamber 22 with an open front, a deep plate-like grill pan 23 on which foodstuffs (cooked items) such as fish, meat, and pizza are placed, a net-like grill pan holder 24 on which the grill pan 23 is placed, and rails 25 for pulling out the grill pan holder 24 to the front side and returning it to the cooking chamber 22. A door 21 (see FIG. 1) for closing the front opening 22a of the cooking chamber 22 is attached to the front side of the rail 25. As shown in FIG.

図３は、ドア２１を取り外し、レール２５を収納した状態の、グリルユニット２０の縦断面図である。ここに示すように、本実施例のグリルユニット２０には、グリルパン２３を加熱するヒーターとして、調理庫２２の天面２２ｂの上面側に上平面ヒーター２６ａを設け、底面２２ｃの下面側に下平面ヒーター２６ｂを設けている。これらのヒーターは、例えば、ニクロム線等の電熱線をマイカ等の耐熱絶縁薄板で挟んだ厚さ１ｍｍ程度の平面ヒーターである。 FIG. 3 is a longitudinal sectional view of the grill unit 20 with the door 21 removed and the rail 25 stored. As shown here, in the grill unit 20 of this embodiment, as a heater for heating the grill pan 23, an upper plane heater 26a is provided on the upper surface side of the top surface 22b of the cooking chamber 22, and a lower plane heater 26b is provided on the lower surface side of the bottom surface 22c. These heaters are, for example, planar heaters having a thickness of about 1 mm, in which a heating wire such as a nichrome wire is sandwiched between heat-resistant insulating thin plates such as mica.

また、上平面ヒーター２６ａの上面を弾性のある上断熱マット２７ａ（例えば、厚さ５ｍｍ程度のガラス繊維塊）で覆い、下平面ヒーター２６ｂの下面を弾性のある下断熱マット２７ｂ（例えば、厚さ５ｍｍ程度のガラス繊維塊）で覆っている。これにより、上平面ヒーター２６ａの熱が上方に漏洩したり、下平面ヒーター２６ｂの熱が下方に漏洩したりするのを抑制している。 The upper surface of the upper plane heater 26a is covered with an elastic upper heat insulating mat 27a (for example, a glass fiber lump having a thickness of about 5 mm), and the lower surface of the lower plane heater 26b is covered with an elastic lower heat insulating mat 27b (for example, a glass fiber lump having a thickness of about 5 mm). This suppresses upward leakage of heat from the upper planar heater 26a and downward leakage of heat from the lower planar heater 26b.

さらに、上断熱マット２７ａの上面を厚さ１ｍｍ程度の金属薄板（ステンレス板等）である上抑え板２８ａで覆い、上抑え板２８ａを複数のネジ２９で天面２２ｂのネジ穴２２ｄに固定している。同様に、下断熱マット２７ｂの下面を厚さ１ｍｍ程度の金属薄板（ステンレス板等）である下抑え板２８ｂで覆い、下抑え板２８ｂを複数のネジ２９で底面２２ｃのネジ穴２２ｄに固定している。 Further, the upper surface of the upper heat insulating mat 27a is covered with an upper restraining plate 28a, which is a thin metal plate (stainless steel plate, etc.) having a thickness of about 1 mm, and the upper restraining plate 28a is fixed to the screw holes 22d of the top surface 22b with a plurality of screws 29. Similarly, the lower surface of the lower heat insulating mat 27b is covered with a lower restraining plate 28b, which is a thin metal plate (stainless steel plate, etc.) having a thickness of about 1 mm, and the lower restraining plate 28b is fixed to the screw holes 22d of the bottom surface 22c with a plurality of screws 29.

本実施例の上平面ヒーター２６ａや下平面ヒーター２６ｂは、発熱中に膨張する特性を有しているため、単に天面２２ｂや底面２２ｃと接触配置しただけでは、膨張により天面２２ｂや底面２２ｃから剥離する虞がある。そこで、本実施例では、剛体の上抑え板２８ａと弾性体の上断熱マット２７ａで上平面ヒーター２６ａの全体を天面２２ｂの上面に押し付け、剛体の下抑え板２８ｂと弾性体の下断熱マット２７ｂで下平面ヒーター２６ｂの全体を底面２２ｃの下面に押し付けている。これにより、上平面ヒーター２６ａや下平面ヒーター２６ｂが発熱により膨張した場合であっても、天面２２ｂや底面２２ｃとの密着を維持できるので、上平面ヒーター２６ａや下平面ヒーター２６ｂから調理庫２２への伝熱効率を高め、調理庫２２からグリルパン２３への輻射熱を高めることができる。 Since the upper plane heater 26a and the lower plane heater 26b of this embodiment have the characteristic of expanding during heat generation, there is a risk that they will separate from the top face 22b or the bottom face 22c due to expansion if they are simply placed in contact with the top face 22b or the bottom face 22c. Therefore, in this embodiment, the entire upper flat heater 26a is pressed against the upper surface of the top surface 22b by the rigid upper pressing plate 28a and the elastic upper insulating mat 27a, and the entire lower planar heater 26b is pressed against the lower surface of the bottom surface 22c by the rigid lower pressing plate 28b and the elastic lower insulating mat 27b. As a result, even when the upper plane heater 26a and the lower plane heater 26b expand due to heat generation, the close contact with the top surface 22b and the bottom plane 22c can be maintained, so that the heat transfer efficiency from the upper plane heater 26a and the lower plane heater 26b to the cooking chamber 22 can be increased, and the radiant heat from the cooking chamber 22 to the grill pan 23 can be increased.

なお、ドア２１の閉鎖時には、グリルパン２３の後端部底面は、調理庫２２の底面２２ｃから突出する温度センサ３０と接触している。従って、グリルユニット２０による調理中には、温度センサ３０が測定したグリルパン２３の温度に基づいて、上平面ヒーター２６ａや下平面ヒーター２６ｂを制御することができる。 When the door 21 is closed, the rear end bottom surface of the grill pan 23 is in contact with the temperature sensor 30 projecting from the bottom surface 22c of the cooking chamber 22. As shown in FIG. Therefore, during cooking by the grill unit 20, the upper plane heater 26a and the lower plane heater 26b can be controlled based on the temperature of the grill pan 23 measured by the temperature sensor 30. FIG.

図４は、調理庫２２の底面２２ｃを上面視した平面図である。ここに示すように、底面２２ｃの上面には、前後方向または左右方向に延びる複数の畝状の凸部と、凸部より２ｍｍ程度低く、かつ、凸部より上面視面積の広い凹部が形成されている。また、底面２２ｃの凹部には、下抑え板２８ｂを固定するための複数のネジ穴２２ｄが設けられている。 FIG. 4 is a top plan view of the bottom surface 22c of the cooking chamber 22. As shown in FIG. As shown here, the upper surface of the bottom surface 22c is formed with a plurality of ridge-shaped protrusions extending in the front-rear direction or the left-right direction, and recesses that are about 2 mm lower than the protrusions and have a larger top view area than the protrusions. Further, a plurality of screw holes 22d for fixing the lower pressing plate 28b are provided in the concave portion of the bottom surface 22c.

調理庫２２の底面２２ｃは、厚さ１ｍｍ程度の金属薄板（ステンレス板等）であるため、凹凸のない平面であれば十分な剛性を確保できず熱応力により変形する虞があるが、図４のように複数の畝状の凸部を設けることで底面２２ｃの剛性が強化されるので、下平面ヒーター２６ｂの使用中の熱応力による底面２２ｃの変形を抑制することができる。なお、底板２２ｃに凹凸を設けると、平坦底面を用いる場合に比べ清掃性が悪化するが、底板２２ｃの凹凸は２ｍｍ程度の小さなものであるため、清掃性が大きく損なわれることはない。 Since the bottom surface 22c of the cooking chamber 22 is a thin metal plate (stainless steel plate, etc.) with a thickness of about 1 mm, if it is a plane surface without unevenness, sufficient rigidity cannot be ensured, and there is a risk of deformation due to thermal stress. However, as shown in FIG. If the bottom plate 22c is roughened, the cleanability is worse than when a flat bottom surface is used.

図５は、図４の底面２２ｃの図示を省略した透視平面図である。ここに示すように、底面２２ｃの下方には、底面２２ｃの凹部下面の全域と接触する形状の下平面ヒーター２６ｂが配置されている。また、下平面ヒーター２６ｂと下断熱マット２７ｂには、底面２２ｃのネジ穴２２ｄと対向する部分にネジ２９を通すための切り欠き部を設けている。従って、下方から下抑え板２８ｂのネジ穴と下平面ヒーター２６ｂ等の切り欠き部を通したネジ２９を、底面２２ｃのネジ穴２２ｄに固定することで、下抑え板２８ｂと底面２２ｃの間に下断熱マット２７ｂと下平面ヒーター２６ｂを挟み込んで固定することができる。 FIG. 5 is a perspective plan view in which illustration of the bottom surface 22c of FIG. 4 is omitted. As shown here, below the bottom surface 22c, a lower plane heater 26b having a shape that contacts the entire lower surface of the concave portion of the bottom surface 22c is arranged. In addition, the lower plane heater 26b and the lower heat insulating mat 27b are provided with notches for passing the screws 29 in portions facing the screw holes 22d of the bottom surface 22c. Therefore, by fixing the screw 29 passing through the screw hole of the lower restraining plate 28b and the notch of the lower planar heater 26b from below to the screw hole 22d of the bottom surface 22c, the lower insulating mat 27b and the lower planar heater 26b can be sandwiched and fixed between the lower restraining plate 28b and the bottom surface 22c.

図３から図５で説明した構成により、下平面ヒーター２６ｂの全面を底面２２ｃの下面に押し付けながら発熱させると、面積の広い凹部下面を介して効率よく底面２２ｃを熱することができる。このとき、発生した熱応力によって底面２２ｃが変形しようとするが、本実施例の底面２２ｃは、図４に示す複数の畝状の凸部により前後方向および左右方向の剛性が高まっているので、熱応力による変形が抑制される。従って、下平面ヒーター２６ｂの発熱中であっても、底面２２ｃと下平面ヒーター２６ｂの密着性は劣化せず、グリルパン２３を正常に加熱することができる。 3 to 5, the bottom surface 22c can be efficiently heated through the wide bottom surface of the concave portion by generating heat while pressing the entire surface of the bottom surface heater 26b against the bottom surface of the bottom surface 22c. At this time, the bottom surface 22c tends to deform due to the generated thermal stress, but since the bottom surface 22c of this embodiment has increased rigidity in the front-back direction and the left-right direction due to the plurality of ridge-shaped protrusions shown in FIG. 4, deformation due to the thermal stress is suppressed. Therefore, even when the lower plane heater 26b is generating heat, the adhesion between the bottom surface 22c and the lower plane heater 26b does not deteriorate, and the grill pan 23 can be heated normally.

一方、図３から図５で説明した構成により、下平面ヒーター２６ｂの全面を底面２２ｃの下面に押し付けても、下平面ヒーター２６ｂは、底面２２ｃの凹部下面より２ｍｍ程度高い凸部下面には到達しないため、凸部下方には下平面ヒーター２６ｂにより閉鎖される密閉空間が形成される。従って、グリルユニット２０の調理庫２２の下方に冷却風を流す構成を採用した場合には、底面２２ｃの凸部下方空間に冷却風が流れ込むことがなく、冷却風の影響により調理庫２２の加熱効率が劣化することはない。 3 to 5, even if the entire surface of the lower plane heater 26b is pressed against the lower surface of the bottom surface 22c, the lower plane heater 26b does not reach the lower surface of the convex portion that is about 2 mm higher than the lower surface of the concave portion of the bottom surface 22c. Therefore, when the cooling air is flown below the cooking chamber 22 of the grill unit 20, the cooling air does not flow into the space below the convex portion of the bottom surface 22c, and the heating efficiency of the cooking chamber 22 is not deteriorated due to the influence of the cooling air.

なお、下平面ヒーター２６ｂで発生した熱の一部は、下断熱マット２７ｂを超えて下抑え板２８ｂにも伝わるため、下平面ヒーター２６ｂの使用中に下抑え板２８ｂが熱変形する虞がある。そこで、下抑え板２８ｂにも底面２２ｃと同等の畝状の凸部を形成し、下抑え板２８ｂの剛性を高め、下抑え板２８ｂの熱変形を抑制できるようにしても良い。 Since part of the heat generated by the lower heater 26b is transferred to the lower pressing plate 28b over the lower heat insulating mat 27b, the lower pressing plate 28b may be thermally deformed during use of the lower heater 26b. Therefore, the lower restraining plate 28b may also be formed with a ridge-like projection similar to that of the bottom surface 22c to increase the rigidity of the lower restraining plate 28b and suppress thermal deformation of the lower restraining plate 28b.

図６は、調理庫２２の底面２２ｃへの凹凸の形成方法を説明する拡大断面図である。図６（ａ）は、底面２２ｃの基準面の下側に凹部を形成するプレス加工を利用して凹凸を形成した構造を例示しており、図６（ｂ）は、底面２２ｃの基準面の上側に凸部を形成するプレス加工を利用して凹凸を形成した構造を例示している。底面２２ｃに凹凸を形成する際には、どちらの方法を採用しても良いが、図６（ｂ）の凹凸形成方法を採用すれば、下平面ヒーター２６ｂをより上方に配置できるので、グリルパン２３の加熱効率をより高めることができる。 FIG. 6 is an enlarged cross-sectional view illustrating a method of forming unevenness on the bottom surface 22c of the cooking chamber 22. As shown in FIG. FIG. 6(a) exemplifies a structure in which unevenness is formed using press work to form recesses below the reference surface of the bottom surface 22c, and FIG. 6(b) illustrates a structure in which unevenness is formed using press work to form protrusions above the reference surface of the bottom surface 22c. Either method can be used to form unevenness on the bottom surface 22c, but if the unevenness forming method shown in FIG.

以上で説明したように、本実施例の加熱調理器によれば、調理庫底面と下ヒーターを接触させたグリルユニット構造を採用する場合、調理庫底面の熱変形を抑制し、することで、調理庫底面と平面ヒータの密着性を維持し、下ヒーターから調理庫底面への熱伝導効率、および、調理庫底面から調理容器への輻射熱効率の劣化を抑制することができる。 As described above, according to the heating cooker of the present embodiment, when adopting the grill unit structure in which the bottom surface of the cooking chamber and the lower heater are in contact with each other, the thermal deformation of the bottom surface of the cooking chamber is suppressed, thereby maintaining the adhesion between the bottom surface of the cooking chamber and the flat heater, and suppressing deterioration of the efficiency of heat conduction from the lower heater to the bottom surface of the cooking chamber and the efficiency of radiant heat from the bottom surface of the cooking chamber to the cooking container.

１０ 加熱調理器
１１ 本体
１２ トッププレート
１３ 鍋載置部
１４ 加熱コイル
１５ 上面操作部
１６ 前面操作部
２０ グリルユニット
２１ ドア
２２ 調理庫
２２ａ 前面開口
２２ｂ 天面
２２ｃ 底面
２２ｄ ネジ穴
２３ グリルパン
２４ グリルパンホルダ
２５ レール
２６ａ 上平面ヒーター
２６ｂ 下平面ヒーター
２７ａ 上断熱マット
２７ｂ 下断熱マット
２８ａ 上抑え板
２８ｂ 下抑え板
２９ ネジ
３０ 温度センサ 10 heating cooker 11 main body 12 top plate 13 pot placing portion 14 heating coil 15 upper operation portion 16 front operation portion 20 grill unit 21 door 22 cooking chamber 22a front opening 22b top surface 22c bottom surface 22d screw hole 23 grill pan 24 grill pan holder 25 rail 26a upper plane heater 26b lower plane heater 27 a upper heat insulating mat 27b lower heat insulating mat 28a upper restraining plate 28b lower restraining plate 29 screw 30 temperature sensor

Claims (4)

被調理物を収納する調理庫と、
該調理庫の前面開口を開閉するドアと、
前記調理庫の底面の下面に接触配置した下ヒーターと、
を具備した加熱調理器であって、
前記調理庫の底面の上面には、畝状の凸部と、該凸部より低い凹部が設けられており、
該凹部の下面と前記下ヒーターが接触しており、
前記下ヒーターは、平面ヒーターであり、
前記凸部の下面と前記平面ヒーターの間に密閉空間が形成されていることを特徴とする加熱調理器。 a cooking chamber for storing food to be cooked;
a door that opens and closes the front opening of the cooking chamber;
a lower heater disposed in contact with the lower surface of the bottom surface of the cooking chamber;
A heating cooker comprising
The upper surface of the bottom surface of the cooking chamber is provided with a ridge-shaped protrusion and a recess lower than the protrusion,
The lower surface of the recess and the lower heater are in contact,
The lower heater is a planar heater,
A heating cooker, wherein a closed space is formed between the lower surface of the projection and the planar heater. 被調理物を収納する調理庫と、
該調理庫の前面開口を開閉するドアと、
前記調理庫の底面の下面に接触配置した下ヒーターと、
を具備した加熱調理器であって、
前記調理庫の底面の上面には、畝状の凸部と、該凸部より低い凹部が設けられており、
該凹部の下面と前記下ヒーターが接触しており、
前記下ヒーターは、平面ヒーターであり、
前記平面ヒーターの下方を弾性体の断熱部材で覆い、
該断熱部材の下方を剛体の抑え部材で覆い、
該抑え部材を前記調理庫の底面に固定することで、前記下ヒーターを前記調理庫の底面に押し付けることを特徴とする加熱調理器。 a cooking chamber for storing food to be cooked;
a door that opens and closes the front opening of the cooking chamber;
a lower heater disposed in contact with the lower surface of the bottom surface of the cooking chamber;
A heating cooker comprising
The upper surface of the bottom surface of the cooking chamber is provided with a ridge-shaped protrusion and a recess lower than the protrusion,
The lower surface of the recess and the lower heater are in contact,
The lower heater is a planar heater,
Covering the lower part of the planar heater with an elastic heat insulating member,
Covering the lower part of the heat insulating member with a rigid holding member,
A heating cooker characterized in that the lower heater is pressed against the bottom surface of the cooking chamber by fixing the holding member to the bottom surface of the cooking chamber. 請求項２に記載の加熱調理器において、
前記平面ヒーターには、前記抑え部材を前記調理庫の底面に固定するためのネジを通す切り欠き部を設けたことを特徴とする加熱調理器。 In the heating cooker according to claim 2,
A heating cooker, wherein the planar heater is provided with a notch portion through which a screw for fixing the holding member to the bottom surface of the cooking chamber is passed. 請求項１から請求項３の何れか一項に記載の加熱調理器において、
前記平面ヒーターは、電熱線を耐熱絶縁薄板で挟んだ平面ヒーターであることを特徴とする加熱調理器。 In the heating cooker according to any one of claims 1 to 3,
A heating cooker, wherein the flat heater is a flat heater in which a heating wire is sandwiched between heat-resistant insulating thin plates.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012237465A (en) 2011-05-10 2012-12-06 Panasonic Corp Heating cooker
JP2012247073A (en) 2011-05-25 2012-12-13 Panasonic Corp Heating cooker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178490A (en) * 1987-01-20 1988-07-22 松下電器産業株式会社 Radio frequency heater with electric heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012237465A (en) 2011-05-10 2012-12-06 Panasonic Corp Heating cooker
JP2012247073A (en) 2011-05-25 2012-12-13 Panasonic Corp Heating cooker

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