JP2007225186A - High frequency cooking heater - Google Patents

High frequency cooking heater Download PDF

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JP2007225186A
JP2007225186A JP2006046538A JP2006046538A JP2007225186A JP 2007225186 A JP2007225186 A JP 2007225186A JP 2006046538 A JP2006046538 A JP 2006046538A JP 2006046538 A JP2006046538 A JP 2006046538A JP 2007225186 A JP2007225186 A JP 2007225186A
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heated
heating
microwaves
cooking apparatus
dish
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Yu Kawai
祐 河合
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a high frequency cooking heater for reducing dielectric heating of a heating object to the minimum and realizing almost only of direct heating by microwaves in the case of directly heating the surface of the heating object by using dielectric heating action from the inside of the heating object using microwaves and conductive heat of a heat generating material generating heat by irradiation of microwaves. <P>SOLUTION: A metallic heating object loading plate 27 equipped with an exothermic body 27b which is a wave absorber with ferrite as the main component on its bottom face, is mounted by engaging a guide 27c on a rail part 28 so as to reduce gaps between wall faces 13, 14, and 15 of a heating chamber 10 and a transparent glass 16c to the minimum. On irradiating microwaves, the microwaves are absorbed by the exothermic body 27e provided on a side face of the heating object loading plate 27 and diffraction of the microwaves to the upper side of the heating object loading plate 27 is suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、マイクロ波により発熱する被加熱物載置皿を備えた加熱調理器に関するものである。   The present invention relates to a heating cooker including a heated object placing plate that generates heat by microwaves.

従来この種の加熱調理器としては、マイクロ波を吸収して発熱する発熱層を設けたセラミック製の食品載置皿を用いて加熱調理する際は、予熱工程を設けるとともに、その初めは高出力でマグネトロンを駆動し、後半はマグネトロンの出力を低下させて駆動させることで、食品載置皿の加熱ムラ（温度ムラ）を抑制するものが提案されている（例えば、特許文献１参照）。
特開２００５−１０６３６２号公報 Conventionally, this type of cooking device is equipped with a preheating step when cooking using a ceramic food dish provided with a heating layer that absorbs microwaves and generates heat. In the latter half, the one that suppresses the heating unevenness (temperature unevenness) of the food placing pan by driving the magnetron by lowering the output of the magnetron has been proposed (for example, see Patent Document 1).
JP 2005-106362 A

しかしながら、前記従来の加熱方法では、載置皿がセラミック製であり、マイクロ波が透過する。このため載置皿上の被加熱物にマイクロ波照射され加熱される。つまり、被加熱物へのマイクロ波の照射量を制限することができない。さらに載置皿そのもののも加熱されるが、セラミック製であり熱伝導率が小さく温度ムラが生じる。   However, in the conventional heating method, the mounting dish is made of ceramic and allows microwaves to pass therethrough. For this reason, the object to be heated on the placing plate is irradiated with microwaves and heated. That is, the amount of microwave irradiation to the object to be heated cannot be limited. Furthermore, although the mounting plate itself is also heated, it is made of ceramic and has a low thermal conductivity, resulting in temperature unevenness.

また、載置皿を金属製で形成した場合は、セラミック製の場合と比較して、載置皿被加熱物へのマイクロ波の照射量はその大部分を抑制することができるが、加熱室壁面と被加熱物載置皿との間には隙間が生じており、その隙間の状態により、被加熱物へマイクロ波照射量が変化する。   In addition, when the mounting tray is made of metal, compared with the case of ceramic, the microwave irradiation amount to the mounting tray heated object can be largely suppressed, but the heating chamber A gap is formed between the wall surface and the object to be heated, and the microwave irradiation amount changes on the object to be heated depending on the state of the gap.

本発明は、前記従来の課題を解決するもので、金属製で被加熱物載置皿を形成するとともに、加熱室壁面と被加熱物載置皿の側面の間に電波吸収体を設けることで可能な限り被加熱物載置皿の上方側へのマイクロ波の回込みを抑制して、被加熱物載置皿を加熱することで、被加熱物に焦げ目をつけながら加熱調理を可能とする高周波加熱調理装置を提供することを目的とする。   The present invention solves the above-mentioned conventional problems, and is made of a metal to form a heated object placing tray, and by providing a radio wave absorber between the heating chamber wall surface and the side surface of the heated object placing plate. By suppressing the wrapping of microwaves to the upper side of the object to be heated as much as possible and heating the object to be heated, cooking can be performed while scorching the object to be heated. An object is to provide a high-frequency cooking device.

前記従来の課題を解決するために、本発明の高周波加熱調理装置は、被加熱物を載置する金属製の被加熱物載置皿と、被加熱物載置皿を係止する係止手段を有する加熱室と、係止手段に被加熱物載置台を係止した際に加熱室底面側或いは側面側より被加熱物載置皿の底面側にマイクロ波を照射するマイクロ波発生手段と、被加熱物載置皿の底面部及び側面部に電波吸収体を備えている。   In order to solve the above-described conventional problems, the high-frequency heating cooking apparatus of the present invention includes a metal heated object placing tray on which an object to be heated is placed, and a locking means for locking the heated object placing dish. A microwave generating means for irradiating microwaves to the bottom surface side of the heated object mounting plate from the bottom surface side or side surface side of the heating chamber when the heated object mounting table is locked to the locking means; A radio wave absorber is provided on the bottom surface and the side surface of the object to be heated.

これによって、加熱室壁面と被加熱物載置皿で形成される隙間を通過するマイクロ波量を低減され、結果として被加熱物の内部加熱が抑制される。また電波吸収体が効率よく加熱され、結果として被加熱物への伝熱量が増加し、被加熱物内部を過加熱にすることなく焦げ目を付ける調理方法が実現する。   Thereby, the amount of microwaves passing through the gap formed by the heating chamber wall surface and the object to be heated is reduced, and as a result, the internal heating of the object to be heated is suppressed. In addition, the radio wave absorber is efficiently heated, and as a result, the amount of heat transfer to the object to be heated is increased, and a cooking method for scorching without overheating the inside of the object to be heated is realized.

高周波加熱調理装置は、被加熱物載置皿の側面部に電波吸収体を備えることで、加熱室壁面とで形成する隙間を電波吸収体で補うこととなり、電波吸収体がマイクロ波を吸収し自ら発熱することで、被加熱物載置皿の周囲を通過して上方側に回り込むマイクロ波の量を低減することが出来る。さらに金属物同士があいまいな距離にならないため、スパーク
などの不具合事項の発生も抑制できる。 The high-frequency cooking device is equipped with a radio wave absorber on the side surface of the dish to be heated, so that the gap formed by the heating chamber wall surface is supplemented by the radio wave absorber, and the radio wave absorber absorbs the microwave. By generating heat by itself, it is possible to reduce the amount of microwaves that pass around the object to be heated and wrap around upward. Furthermore, since metal objects do not become ambiguous distances, occurrence of problems such as sparks can be suppressed.

第１の発明は、被加熱物載置皿の側面部に設けられた電波吸収体が自ら発熱することで、被加熱物載置皿の周囲から上方側に回り込むマイクロ波量を低減する。よって、被加熱物の内部加熱を抑制しつつ外部からの伝熱加熱を促進することが出来る。   1st invention reduces the amount of microwaves which goes around from the circumference | surroundings of a to-be-heated object mounting dish to the upper side because the electromagnetic wave absorber provided in the side part of the to-be-heated object mounting dish heat | fever-generates itself. Therefore, heat transfer heating from the outside can be promoted while suppressing internal heating of the object to be heated.

第２の発明は、グリル皿の周囲に電波を通過させるスリット孔を開閉することにより、被加熱物へのマイクロ波の照射量を調節することが出来る。   In the second invention, the amount of microwave irradiation to the object to be heated can be adjusted by opening and closing a slit hole that allows radio waves to pass around the grill pan.

第３の発明は、スリット孔の閉止手段の収納部を備えたことにより、スリット孔の閉止手段の紛失を抑制することが出来る。また、一目で分かる場所に収納部を設ければ、使用状態も判断することが出来る。   According to the third aspect of the present invention, the loss of the slit hole closing means can be suppressed by providing the slit hole closing means accommodating portion. Moreover, if a storage part is provided in a place that can be seen at a glance, the use state can also be determined.

第４の発明は、被加熱物載置皿の載置面を凹凸状とし、凹状部分には電波吸収体を設けない構成としたものであり、被加熱物から落下、離脱した脂分や油分が、重力により凹部に流れ込む構成とすることで、脂分や油分などが再加熱されることがない、このため焦げや、発煙が防止できる。また、多くの場合、被加熱物は凸部に接しており、結果として効率よく加熱させることになる。   4th invention makes the mounting surface of a to-be-heated object mounting plate uneven | corrugated shape, and was set as the structure which does not provide a radio wave absorber in a concave part, and the fat and oil which fell from the to-be-heated material, and removed However, by adopting a structure that flows into the concave portion by gravity, the fat and oil are not reheated, so that scorching and smoke generation can be prevented. In many cases, the object to be heated is in contact with the convex portion, and as a result, it is efficiently heated.

第５の発明は、給水手段により、自在に被加熱物載置皿に水を給水することができ、被加熱物に湿度を与えるあるいは蒸気を作用させることができる。よって、マイクロ波を用いて焼き、蒸しなど複数の加熱作用を行うことが出来る。   In the fifth aspect of the invention, water can be freely supplied to the object to be heated by the water supply means, and humidity can be applied to the object to be heated or steam can be applied. Therefore, a plurality of heating operations such as baking and steaming can be performed using microwaves.

第６の発明は、電波吸収体はキューリー点を有するフェライトを主成分とするゴムで形成したものであり、これにより、発熱温度を自己抑制させることが出来る。よって、キューリー点まで加熱された電波吸収体は、電波吸収力が低下し、被加熱物載皿上方側への電波回り込み量が徐々に増加させることが出来る。   In the sixth aspect of the invention, the radio wave absorber is formed of rubber mainly composed of ferrite having a Curie point, and thereby the heat generation temperature can be self-suppressed. Therefore, the radio wave absorber heated to the Curie point has a reduced radio wave absorption capability, and the amount of radio wave wrapping to the upper side of the object to be heated can be gradually increased.

第７の発明は、被加熱物載置皿の温度を検知する温度センサを備え、マイクロ波供給により加熱される載置皿の温度が所定温度に到達すれば、マイクロ波の出力を低下或いは停止するようにしたものであり、これにより、短時間で被加熱物載置皿を高温化するともに一部のみでの高温化に伴う不具合を抑制することとなる。   7th invention is equipped with the temperature sensor which detects the temperature of a to-be-heated material mounting tray, and if the temperature of the mounting tray heated by microwave supply reaches predetermined temperature, it will reduce or stop the output of a microwave As a result, the temperature of the heated object placing tray is increased in a short time and, at the same time, problems associated with the increase in temperature of only a part are suppressed.

第８の発明は、所定時間マイクロ波を供給すると、マイクロ波の出力を低下させるようにしたものであり、これにより、短時間で被加熱物載置皿を高温化するともに一部のみでの高温化に伴う不具合を抑制することとなる。   According to an eighth aspect of the present invention, when microwaves are supplied for a predetermined time, the output of the microwaves is reduced. As a result, the temperature of the dish to be heated is increased in a short time, and only a part of the dish is heated. This will suppress problems associated with high temperatures.

以下、本発明の実施の形態について、図面を参照しながら説明する。尚、実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

（実施の形態１）
以下、本発明に係る高周波加熱調理装置の好適な実施の形態について、図面を参照して詳細に説明する。 (Embodiment 1)
Hereinafter, preferred embodiments of a high-frequency cooking device according to the present invention will be described in detail with reference to the drawings.

図１、図２は本発明に係る高周波加熱調理装置の断面図、図３は被加熱物載置皿の斜視図である。   1 and 2 are cross-sectional views of the high-frequency heating cooking apparatus according to the present invention, and FIG. 3 is a perspective view of the object to be heated.

図１〜図３において、加熱室１０は金属材料から構成された金属境界部である右側壁面１１、左側壁面１２、奥壁面１３、上壁面１４、底壁面１５及び被加熱物を加熱室１０内
に出し入れする開閉壁面である開閉扉１６により略直方体形状に構成され、給電された高周波をその内部に実質的に閉じ込めるように形成している。底壁面１５には断面が略四角形の絞り部１７を設け、絞り部１７の略中央部には加熱室１０内に給電する高周波の励振部１８を設けている。 1 to 3, the heating chamber 10 includes a right side wall surface 11, a left side wall surface 12, a back wall surface 13, an upper wall surface 14, a bottom wall surface 15, and an object to be heated, which are metal boundary portions made of a metal material. An open / close door 16 that is an open / close wall surface to be taken in and out is formed in a substantially rectangular parallelepiped shape, and is formed so as to substantially confine the supplied high frequency inside. The bottom wall surface 15 is provided with a throttle portion 17 having a substantially rectangular cross section, and a high frequency excitation portion 18 for supplying power into the heating chamber 10 is provided at a substantially central portion of the throttle portion 17.

また、高周波発生手段であるマグネトロン１９は加熱室１０に給電する高周波を発生し、導波管２０はマグネトロン１９が発生した高周波を励振部１８に導く。励振部１８には導波管２０内に延在し導波管２０を伝送してきた高周波と結合するアンテナ２１を設け、このアンテナ２１の一端は導波管タイプの指向性を有する放射アンテナとして電波放射手段２２と接続している。またアンテナ２１の他端は電波放射手段２２を回転駆動させる駆動手段であるモータ２３の出力軸を挿入組立てしている。   The magnetron 19 as a high frequency generating means generates a high frequency to supply power to the heating chamber 10, and the waveguide 20 guides the high frequency generated by the magnetron 19 to the excitation unit 18. The exciter 18 is provided with an antenna 21 that extends into the waveguide 20 and is coupled to a high frequency that has been transmitted through the waveguide 20. One end of the antenna 21 is a radio wave antenna having a waveguide type directivity. The radiation means 22 is connected. The other end of the antenna 21 is assembled by inserting and assembling an output shaft of a motor 23 which is a driving means for rotating the radio wave radiation means 22.

この電波放射手段２２はモータ２３を駆動することで扇型の上面が絞り部１７の底面と略平行面において回転駆動する。   The radio wave radiating means 22 is driven to rotate by driving the motor 23 so that the fan-shaped upper surface is substantially parallel to the bottom surface of the diaphragm 17.

また、絞り部１７の開口部には電波透過材料、たとえばガラス系やセラミックス系の材料からなる封口手段２４を設けている。   Further, a sealing means 24 made of a radio wave transmitting material, for example, a glass-based material or a ceramic-based material is provided in the opening portion of the diaphragm portion 17.

被加熱物を加熱する際に用いる金属製の被加熱物載置皿２７は、載置面が凹凸状に形成された皿本体２７ａと、その底面及び側面に備えられたフェライトを主成分とし、電波吸収体である発熱体２７ｂ、２７ｅと、皿本体２７ａの長手側周囲に設けられた耐熱樹脂で形成されたガイド２７ｃと、皿本体２７ａ周囲に設けられた略長方形の複数の開口部であるスリット孔２７ｄを備えている。   The metal heated object mounting tray 27 used when heating the heated object is mainly composed of a plate body 27a having a concave and convex mounting surface and ferrite provided on the bottom and side surfaces thereof. The heating elements 27b and 27e, which are radio wave absorbers, the guide 27c formed of a heat-resistant resin provided around the longitudinal side of the dish body 27a, and a plurality of substantially rectangular openings provided around the dish body 27a. A slit hole 27d is provided.

また閉止手段２５は、スリット孔２７ｄを介して電波の通り抜けを防止するためのフェライトを主成分とするゴムで形成され、スリット孔２７ｄに対し着脱自在にしており、使用しない場合は開閉扉上面に設けられた専用の収納部２６に固定できるようにしている。   The closing means 25 is made of rubber mainly composed of ferrite for preventing radio waves from passing through the slit hole 27d, and is detachable from the slit hole 27d. It can be fixed to a dedicated storage section 26 provided.

また、被加熱物載置皿２７は、加熱室１０の左右壁面１３、１４に設けられた係止手段であるレール部２８にガイド２７ｃが係止することで取り付けられる。これにより、皿本体２７ａと壁面１３、１４とは常に所定寸法の隙間が得られる。さらに、レール部２８は、被加熱物載置皿２７の設置位置を調整するために異なる高さのレールが設けられている。   The heated object placing tray 27 is attached by the guide 27c being locked to the rail portion 28 which is a locking means provided on the left and right wall surfaces 13 and 14 of the heating chamber 10. Thereby, the clearance gap of a predetermined dimension is always obtained between the plate main body 27a and the wall surfaces 13 and 14. FIG. Further, the rail portion 28 is provided with rails having different heights in order to adjust the installation position of the heated object placing tray 27.

また、加熱ヒータ２９が加熱室１０の上方に備えられ、コンベクションヒータユニット３０がその後方に設けられている。コンベクションヒータユニット３０は加熱室内１０の空気を攪拌するファン３０ａと、ファン３０ａを回転駆動するモータ３０ｂと、ファン３０ａの周囲に位置するシーズヒータ３０ｃで構成されている。尚、コンベクションヒータユニット３０は加熱室１０内の空気を吸排気するパンチング孔（図示せず）が奥壁面１３に給気と排気に分離されて多数備えている。そして、サーミスタ３１により、加熱室１０内の温度を検知する。   A heater 29 is provided above the heating chamber 10, and a convection heater unit 30 is provided behind the heater. The convection heater unit 30 includes a fan 30a that stirs the air in the heating chamber 10, a motor 30b that rotationally drives the fan 30a, and a sheathed heater 30c that is positioned around the fan 30a. The convection heater unit 30 has a number of punching holes (not shown) for sucking and exhausting the air in the heating chamber 10 separated into the back wall surface 13 for supply and exhaust. Then, the thermistor 31 detects the temperature in the heating chamber 10.

給水手段３２には、給水タンク３２ａと、給水タンク３２ａの水を加熱室１０内に搬送するポンプ３２cと、ポンプ３２ｃで搬送する水を加熱室１０内に供給する給水ノズル３２ｂが備えられている。   The water supply means 32 is provided with a water supply tank 32a, a pump 32c for conveying the water in the water supply tank 32a into the heating chamber 10, and a water supply nozzle 32b for supplying the water conveyed by the pump 32c into the heating chamber 10. .

温度センサである赤外線センサ３３により、加熱室の奥側壁面１３の上方に設けた凹部３４の孔３５を介して、被加熱物載置皿２７の表面あるいは加熱室の底面の表面を温度検出領域としている。赤外線センサ３３は、被加熱物載置皿２７の全域を温度検出領域とするためのセンサ部駆動手段（図示せず）を備えている。   By means of an infrared sensor 33 which is a temperature sensor, the surface of the object to be heated 27 or the surface of the bottom surface of the heating chamber is detected through a hole 35 in a recess 34 provided above the back side wall surface 13 of the heating chamber. It is said. The infrared sensor 33 is provided with a sensor drive means (not shown) for setting the entire area of the heated object placing tray 27 as a temperature detection area.

なお、この赤外線センサ２９は複数の検出素子（例えば４素子、８素子）で構成し、加熱室１０の前後方向に首振りして被加熱物載置皿２７の全域を温度検出領域とする構成が望ましいが、単素子構成として左右方向とそれに対する垂直方向の２軸可動とした構成にしても構わない。   The infrared sensor 29 is composed of a plurality of detection elements (for example, 4 elements, 8 elements) and swings in the front-rear direction of the heating chamber 10 so that the entire area of the heated object placing tray 27 is a temperature detection area. However, as a single element configuration, it may be configured to be biaxially movable in the left-right direction and the direction perpendicular thereto.

また、マグネトロン１９を駆動するインバータ駆動電源部３６、装置全体の動作を制御する制御手段３７を備えている。赤外線センサ３３が検出した信号は制御手段３７に入力させている。制御手段３７は、操作部（図示せず）から入力された情報、赤外線センサ２９および回転位置識別手段２５からの信号に基づいて、インバータ駆動電源部３６の動作および電波放射手段２２を回転駆動するモータ２３の動作を制御して加熱室１０内に収納された被加熱物を誘電加熱するなど、上記した構成部品の制御を司っている。   In addition, an inverter drive power supply unit 36 for driving the magnetron 19 and a control means 37 for controlling the operation of the entire apparatus are provided. A signal detected by the infrared sensor 33 is input to the control means 37. The control means 37 rotationally drives the operation of the inverter drive power supply section 36 and the radio wave radiation means 22 based on information input from the operation section (not shown) and signals from the infrared sensor 29 and the rotational position identification means 25. It controls the above-described components, such as controlling the operation of the motor 23 to dielectrically heat an object to be heated housed in the heating chamber 10.

次に以上の構成からなる本発明の高周波加熱調理装置の動作と作用について説明する。   Next, operation | movement and an effect | action of the high frequency heating cooking apparatus of this invention which consist of the above structure are demonstrated.

加熱室１０内に被加熱物載置皿２７のスリット孔２７ｄに閉止手段２５を取り付けた状態で、被加熱物を載置した被加熱物載置皿２７をレール部２８に係止し、開閉扉１６を閉めた状態で、所定の指示操作を行うと、制御手段３７によりインバータ駆動電源部３６、マグネトロン１９などが動作、マイクロ波を発生し、導波管２１、励振部１８を経て、電波放出手段２２から、セラミックなどで形成された封口手段２４を通過して加熱室１０内部に照射するようになる。   With the closing means 25 attached to the slit hole 27d of the heated object placing tray 27 in the heating chamber 10, the heated object placing plate 27 on which the heated object is placed is locked to the rail portion 28, and opened and closed. When a predetermined instruction operation is performed with the door 16 closed, the control means 37 operates the inverter drive power supply unit 36, the magnetron 19 and the like, generates microwaves, passes through the waveguide 21 and the excitation unit 18, and passes through the radio wave. From the discharge means 22, the inside of the heating chamber 10 is irradiated through the sealing means 24 made of ceramic or the like.

このため、発生した電波は被加熱物載置皿２７の電波吸収体である発熱体２７ｂに吸収され、自ら発熱することで、皿本体２７ｂを加熱する。これにより、被加熱物に伝熱された熱エネルギで被加熱物底面が加熱されるようになる。   For this reason, the generated radio wave is absorbed by the heating element 27b, which is a radio wave absorber of the heated object mounting tray 27, and heats itself to heat the dish body 27b. As a result, the bottom surface of the heated object is heated by the heat energy transferred to the heated object.

ところで、被加熱物載置皿２７の右側壁面１３および左側壁面１４に設けられたレール部２８に皿本体２７ａがガイド２７ｃを介して係止されているが、奥側壁面１３にはレール部２８は設けられていない。しかし、ガイド２７ｃが取り付けられた部分以外の側面には、電波吸収体である発熱体２７ｅが設けられており、発熱体２７ｅを介して、右側壁面１３、左側壁面１４、奥壁面１５、開閉手段１６にほぼ接触するように規制している。   By the way, although the plate body 27a is locked to the rail portion 28 provided on the right side wall surface 13 and the left wall surface 14 of the article to be heated 27 via the guide 27c, the rail portion 28 is attached to the back side wall surface 13. Is not provided. However, a heating element 27e, which is a radio wave absorber, is provided on a side surface other than the portion where the guide 27c is attached, and the right side wall surface 13, the left side wall surface 14, the back wall surface 15 and the opening / closing means are provided via the heating element 27e. 16 is regulated so as to be almost in contact.

また、開閉扉１６は外側に配置された透視ガラス１６ａと、加熱室１０内に入れた被加熱物の調理状態を確認するためにパンチング孔が設けられ、その周囲に電波シール機構（チョーク）を備えた電波漏洩防止板である金属体１６ｂと、内側の透視ガラス１６ｃとからなり、所定の隙間を有するように設けられている。   Moreover, the opening / closing door 16 is provided with a see-through glass 16a disposed outside and a punching hole for confirming the cooking state of the object to be heated placed in the heating chamber 10, and a radio wave sealing mechanism (choke) is provided around it. It consists of a metal body 16b, which is a radio wave leakage prevention plate, and an inner see-through glass 16c, and is provided so as to have a predetermined gap.

これにより、皿本体２７と、左右・奥壁面・透視ガラス１６ｃとは限りなく物理的に小さな隙間に規制されているのみならず、電波の通り道としても規制されている。   As a result, the plate body 27 and the left / right / back wall / transparent glass 16c are not only physically restricted to small gaps but also restricted as paths for radio waves.

透視ガラス１６ａ内部及び、透視ガラスと金属体１６ｂとの隙間をマイクロ波が通過し、被加熱物載置皿２７の上方側に、回り込むマイクロ波量が残るが極力低減させ、電波吸収体である発熱体２７ｂ及び発熱体２７ｅへの電波照射量が多くなるようにしている。   The microwave passes through the inside of the see-through glass 16a and the gap between the see-through glass and the metal body 16b, and the amount of microwave that wraps around remains on the upper side of the object-to-be-heated object placing tray 27. The amount of radio wave irradiation to the heating element 27b and the heating element 27e is increased.

この状態を継続され、所定時間（Ｔ１）が経過すると、マグネトロンの出力が低下するように制御される。   This state is continued, and when a predetermined time (T1) elapses, the output of the magnetron is controlled to decrease.

この様に、出力が低下するようになることで、発熱体２７ｂ、２７ｅのマグネトロンの電波吸収量が低下し、結果として発熱量も低減する。これにより短時間での発熱体の温度上昇を確保しつつ、急激な温度上昇を防止できる。   As described above, since the output decreases, the amount of electromagnetic wave absorbed by the magnetrons of the heating elements 27b and 27e decreases, and as a result, the amount of generated heat also decreases. As a result, it is possible to prevent a rapid temperature rise while securing a temperature rise of the heating element in a short time.

その後、所定時間（Ｔ２）が経過すると、マグネトロン１９の動作が停止され、加熱ヒータ２９を動作させ、輻射熱により被加熱物の上方側を加熱する。   Thereafter, when a predetermined time (T2) elapses, the operation of the magnetron 19 is stopped, the heater 29 is operated, and the upper side of the object to be heated is heated by radiant heat.

またあるタイミングで、給水手段３２を動作させるようにプログラムしておくと、給水タンク３２ａの水がポンプ３２ｃにより、皿本体２７ａに供給することで加湿することもできる。また、皿本体の温度、給水量によっても異なるが、被加熱物表面から凝縮熱が被加熱物に作用させることも可能となる。   If the water supply means 32 is programmed to operate at a certain timing, the water in the water supply tank 32a can be humidified by being supplied to the dish body 27a by the pump 32c. Moreover, although it changes also with the temperature of a dish main body, and the amount of water supply, it also becomes possible for condensation heat to act on a to-be-heated object from the to-be-heated object surface.

また、時間制御によりマイクロ波を停止させるようにしたが、被加熱物の温度を温度検知センサで検知して制御することも可能である。   Although the microwave is stopped by time control, it is also possible to detect and control the temperature of the object to be heated by the temperature detection sensor.

なお、閉止手段２５をスリット孔２７ｄに取り付けずに動作させることも可能である。   It is also possible to operate the closing means 25 without attaching it to the slit hole 27d.

図４は被加熱物として水２００ｃｃを入れた樹脂容器を載置した被加熱物載置皿２７をレール部２８に係止し、マグネトロン１９を駆動した場合の、被加熱物載置皿２７上方側へのマイクロ波の回り込み量（水に入るエネルギー量）を示すものである。Ａは被加熱物載置皿周囲に発熱体２７ｅを有するものでスリット孔２７ｄに閉止手段２５も設けたもの。Ｂは被加熱物載置皿周囲に発熱体２７ｅを有するものでスリット孔２７ｄに閉止手段２５を取り付けないの、Ｃは被加熱物載置皿周囲に発熱体２７ｅを有さないものをそれぞれ示す。なお、図の縦軸は有さない場合を１とした。   FIG. 4 shows the upper side of the heated object placing tray 27 when the heated object placing tray 27 on which a resin container containing 200 cc of water is placed as the heated object is locked to the rail portion 28 and the magnetron 19 is driven. It shows the amount of microwave wraparound to the side (the amount of energy entering the water). A has a heating element 27e around the object to be heated and is provided with a closing means 25 in the slit hole 27d. B has a heating element 27e around the object to be heated, and the closing means 25 is not attached to the slit hole 27d, and C has no heating element 27e around the object to be heated. . In addition, the case where there is no vertical axis in the figure is 1.

同図より、発熱体２７ｅを保有することで、被加熱物載置皿２７上に載せた被加熱物へのマイクロ波の照射量を低減することができるうえ、閉止手段２５の着脱によりマイクロ波の照射量を可変調整することが出来る。例えば、被加熱物の負荷量の大きい場合は閉止手段２５を取り付けずに加熱することで内部から効率的に加熱できるし、焦げ目を多くつけたい場合は、閉止手段２５を取り付けて加熱するようにもできる。   As shown in the figure, by holding the heating element 27e, it is possible to reduce the amount of microwave irradiation to the heated object placed on the heated object mounting tray 27, and to attach and detach the microwaves by attaching and detaching the closing means 25. Can be variably adjusted. For example, when the load of the object to be heated is large, heating can be efficiently performed from the inside by heating without attaching the closing means 25, and when it is desired to increase the number of burns, the closing means 25 is attached and heated. You can also.

次に、被加熱物載置皿２７をあらかじめ加熱して利用する場合の予熱動作について記載する。   Next, the preheating operation in the case of heating and using the heated object placing tray 27 in advance will be described.

加熱室１０内に被加熱物を載置しない状態で、被加熱物載置皿２７をレール部２８に係止し、開閉扉１６を閉めた状態で、所定の操作を行うと、マイクロ波が加熱室１０内に供給される。発生したマイクロ波は、被加熱物載置皿２７の電波吸収体である発熱体２７ｂ、２７ｅに吸収され、自ら発熱することで、皿本体２７ｂを加熱する。   When a predetermined operation is performed with the heated object placing tray 27 locked to the rail portion 28 and the open / close door 16 closed with no heated object placed in the heating chamber 10, microwaves are generated. It is supplied into the heating chamber 10. The generated microwave is absorbed by the heating elements 27b and 27e, which are radio wave absorbers of the object-to-be-heated object placing tray 27, and heats itself to heat the dish body 27b.

被加熱物載置皿２７は、温度検知手段である赤外線センサ３３により温度検知しており、所定温度（ＴＨ１）以上になれば、インバータ駆動電源部３６により、マグネトロン１９の動作出力を低下させ、加熱室１０内に供給されるマイクロ波の量を減少させる。マグネトロン１９の出力を低下させる。これにより、電波吸収体である発熱体２７ｂ、２７ｅへのマイクロ波の照射量が減少し、発熱量も低下する。さらに皿本体２７ｂから放熱する熱エネルギーは皿温度に起因するためほぼ同一であり、皿本体２７ｂの温度上昇が鈍るとともに、皿本体２７内部での伝熱により、皿本体２７ｂの温度が均一になる。   The to-be-heated object mounting tray 27 is temperature-detected by an infrared sensor 33 that is a temperature detecting means. The amount of microwaves supplied into the heating chamber 10 is reduced. The output of the magnetron 19 is reduced. As a result, the amount of microwave irradiation to the heating elements 27b and 27e, which are radio wave absorbers, is reduced, and the heating value is also reduced. Further, the heat energy radiated from the dish main body 27b is substantially the same because it is caused by the dish temperature. The temperature rise of the dish main body 27b is dull, and the temperature of the dish main body 27b becomes uniform due to heat transfer inside the dish main body 27. .

これにより、被加熱物載置皿２７の異常発熱を防止することが出来る。   Thereby, abnormal heat generation of the heated object placing tray 27 can be prevented.

（実施の形態２）
以下、本発明に係る高周波加熱調理装置の好適な実施の形態について、図面を参照して詳細に説明する。 (Embodiment 2)
Hereinafter, preferred embodiments of a high-frequency cooking device according to the present invention will be described in detail with reference to the drawings.

図５、図６は被加熱物載置皿の斜視図及び断面図である。   5 and 6 are a perspective view and a cross-sectional view of the article to be heated.

図５、図６において、金属製の被加熱物載置皿３８は、載置面が凹凸状に形成された皿本体３８ａと、その底面の凸部及び側面に備えられたフェライトを主成分とし、電波吸収体である発熱体３８ｂ、３８ｅと、皿本体３８ａの長手側周囲に設けられた耐熱樹脂で形成されたガイド３８ｃと、皿本体３８ａ周囲に設けられた略長方形の複数の開口部であるスリット孔３８ｄを備えている。   5 and 6, the metal heated object mounting tray 38 is mainly composed of a plate body 38 a having a mounting surface formed in a concavo-convex shape, and ferrite provided on the convex portions and side surfaces of the bottom surface. A heating element 38b, 38e, which is a radio wave absorber, a guide 38c formed of a heat-resistant resin provided around the longitudinal side of the dish body 38a, and a plurality of substantially rectangular openings provided around the dish body 38a. A slit hole 38d is provided.

この被加熱物載置皿３８を加熱室１０内に設置し、マイクロ波を照射させると、凸部に備えられた発熱体３８ｂで発生した熱はその上側の金属部３８ｆに伝熱され、さらに金属部３８ｆから横側の凹部上側の金属部３８ｇに熱伝導される。   When this heated object mounting tray 38 is installed in the heating chamber 10 and irradiated with microwaves, the heat generated by the heating element 38b provided on the convex portion is transferred to the upper metal portion 38f, and further Thermal conduction is performed from the metal part 38f to the metal part 38g above the lateral recess.

例えば、肉などを調理すると、脂が落下し凹部に溜まるが、凹部そのものは直接加熱されないため、脂の温度が上昇しにくく、発煙や脂の飛散が低減できる。これにより、加熱室１０内の汚れを低減できる。なお、その他については実施の形態２と同様である。   For example, when cooking meat or the like, the fat falls and accumulates in the recesses, but the recesses themselves are not directly heated, so that the temperature of the fat is unlikely to rise, and smoke and fat scattering can be reduced. Thereby, the dirt in the heating chamber 10 can be reduced. Others are the same as in the second embodiment.

以上のように本発明にかかる高周波加熱調理装置は、発熱体を有する金属製の被加熱物載置皿の下方側からマイクロ波を照射することで載置皿を加熱して、被加熱物を熱伝導により加熱するとともに、被加熱物載置皿の周囲に発熱体を設け、電波遮蔽（吸収）性を活かすことで、載置皿の上方側へのマイクロ波の照射量を制御することができる。単なる調理分野のみでなく、被加熱物の乾燥や焼成などの用途にも適用できる。   As described above, the high-frequency heating cooking apparatus according to the present invention heats the placing dish by irradiating the microwave from the lower side of the metal to-be-heated article placing dish having a heating element, and It is possible to control the amount of microwave irradiation to the upper side of the mounting tray by heating by heat conduction and providing a heating element around the object mounting tray to make use of radio wave shielding (absorption). it can. The present invention can be applied not only to the cooking field but also to uses such as drying and baking of an object to be heated.

本発明の実施の形態１における高周波加熱調理装置の正面断面構成図Front cross-section block diagram of the high frequency heating cooking apparatus in Embodiment 1 of this invention 同装置の横断面構成図Cross-sectional configuration diagram of the device 同装置の被加熱物載置皿の斜視図The perspective view of the to-be-heated material mounting tray of the apparatus 同装置の被加熱物載置皿上方への電波回り込み量を示す図The figure which shows the amount of electric wave wrapping around the heated object mounting tray of the same device 本発明の実施の形態２における同装置の被加熱物載置皿の斜視図The perspective view of the to-be-heated material mounting tray of the apparatus in Embodiment 2 of this invention 同装置の被加熱物載置皿の断面構成図Cross-sectional configuration diagram of a heated object placing tray of the apparatus

符号の説明Explanation of symbols

１０ 加熱室
１９ マグネトロン
２５ 閉止手段
２６ 収納部
２７ 被加熱載置皿
２７ａ 皿本体
２７ｂ 発熱体
２７ｄ スリット孔
２７ｅ 発熱体
２８ レール部
３２ 給水手段
３２ａ 給水タンク
３２ｂ 給水ノズル
３２c ポンプ
３３ 赤外線センサ
３８ 被加熱物載置皿
３８ｂ 発熱体
３８ｅ 発熱体
３８ｆ 金属部（凸部）
３８ｇ 金属部（凹部）


DESCRIPTION OF SYMBOLS 10 Heating chamber 19 Magnetron 25 Closing means 26 Storage part 27 Heated mounting tray 27a Dish main body 27b Heat generating element 27d Slit hole 27e Heating element 28 Rail part 32 Water supplying means 32a Water supply tank 32b Water supply nozzle 32c Pump 33 Infrared sensor 38 Placement plate 38b Heating element 38e Heating element 38f Metal part (convex part)
38g Metal part (recess)


Claims (8)

被加熱物を載置する金属製の被加熱物載置皿と、前記被加熱物載置皿を係止する係止手段を有する加熱室と、前記係止手段に前記被加熱物載置台を係止した際に前記加熱室底面側或いは側面側より前記被加熱物載置皿の底面側にマイクロ波を照射するマイクロ波発生手段と、前記被加熱物載置皿の底面部及び側面部に電波吸収体を備えた高周波加熱調理装置。 A metal heated object placing tray for placing an object to be heated, a heating chamber having a locking means for locking the heated object mounting dish, and the heated object mounting table on the locking means Microwave generation means for irradiating microwaves to the bottom surface side of the object to be heated tray from the bottom surface side or side surface side of the heating chamber when locked, and the bottom surface portion and the side surface portion of the object to be heated object tray A high-frequency cooking device equipped with an electromagnetic wave absorber. 被加熱物載置皿の周囲に、マイクロ波を通過させるスリット孔と、前記スリット孔を閉止する着脱自在の閉止手段を備えた請求項１記載の高周波加熱調理装置。 The high-frequency cooking apparatus according to claim 1, further comprising a slit hole through which microwaves pass and a detachable closing unit that closes the slit hole around the dish to be heated. スリット孔の閉止手段の収納部を備えた請求項２記載の高周波加熱調理装置。 The high frequency cooking apparatus according to claim 2, further comprising a storage portion for closing means for the slit hole. 被加熱物載置皿の載置面を凹凸状とし、凹状部分には電波吸収体を設けない構成とした請求項１〜３のいずれか１項に記載の高周波加熱調理装置。 The high-frequency heating cooking apparatus according to any one of claims 1 to 3, wherein the placing surface of the dish to be heated is uneven, and the concave portion is not provided with a radio wave absorber. 被加熱物載置皿に水を給水する給水手段を備えた請求項１〜４のいずれか１項に記載の高周波加熱調理装置。 The high frequency heating cooking apparatus of any one of Claims 1-4 provided with the water supply means which supplies water to a to-be-heated material mounting tray. 電波吸収体はキューリー点を有するフェライトを主成分とするゴムで形成した請求項１〜５のいずれか１項に記載の高周波加熱調理装置。 The high-frequency heating cooking apparatus according to any one of claims 1 to 5, wherein the radio wave absorber is formed of a rubber mainly composed of ferrite having a Curie point. 被加熱物載置皿の温度を検知する温度センサを備え、マイクロ波供給により加熱される載置皿の温度が所定温度に到達すれば、マイクロ波の出力を低下或いは停止するようにした請求項１から６のいずれか１項記載の高周波加熱調理装置。 A temperature sensor for detecting the temperature of the article to be heated is provided, and the microwave output is reduced or stopped when the temperature of the dish heated by the microwave supply reaches a predetermined temperature. The high frequency cooking apparatus according to any one of 1 to 6. 所定時間マイクロ波を供給すると、マイクロ波の出力を低下させるようにした請求項１から７のいずれか１項記載の高周波加熱調理装置。


The high-frequency cooking apparatus according to any one of claims 1 to 7, wherein when microwaves are supplied for a predetermined time, the output of the microwaves is reduced.


JP2006046538A 2006-02-23 2006-02-23 High frequency cooking heater Pending JP2007225186A (en)

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