JP6861332B2 - High frequency heating device - Google Patents

High frequency heating device Download PDF

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JP6861332B2
JP6861332B2 JP2016129558A JP2016129558A JP6861332B2 JP 6861332 B2 JP6861332 B2 JP 6861332B2 JP 2016129558 A JP2016129558 A JP 2016129558A JP 2016129558 A JP2016129558 A JP 2016129558A JP 6861332 B2 JP6861332 B2 JP 6861332B2
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frequency power
transmission line
wave transmission
surface wave
power supply
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岡島　利幸
利幸 岡島
大森　義治
義治 大森
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、周期構造体を用いた表面波伝送線路を備えた高周波加熱装置に関する。 The present invention relates to a high frequency heating device provided with a surface wave transmission line using a periodic structure.

従来から、周期構造体を用いた表面波伝送線路に高周波電力を給電して、食品等の被加熱物に加熱処理を施す高周波加熱装置に関する技術が開示されている。 Conventionally, a technique relating to a high-frequency heating device for supplying high-frequency power to a surface wave transmission line using a periodic structure to heat an object to be heated such as food has been disclosed.

例えば、特許文献１には、伝送線路に近い側が強く加熱される表面波の特徴を活かすべく、表面波伝送線路へ直接マイクロ波を供給することで、冷凍寿司のしゃり部を効率よく解凍もしくは加熱する高周波解凍加熱装置が開示されている。 For example, in Patent Document 1, in order to take advantage of the characteristics of surface waves in which the side close to the transmission line is strongly heated, microwaves are directly supplied to the surface wave transmission line to efficiently thaw or thaw the sushi portion of frozen sushi. A high frequency thawing heating device for heating is disclosed.

特開平８−１６６１３３号公報Japanese Unexamined Patent Publication No. 8-166133

しかしながら、前記従来の構成では、表面波伝送線路へ高周波電力であるマイクロ波を直接供給するために、表面波伝送線路の幅寸法が限定され、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約が大きくなるという課題があった。 However, in the conventional configuration, since microwaves, which are high-frequency power, are directly supplied to the surface wave transmission line, the width dimension of the surface wave transmission line is limited, and an object to be heated that can be heated by one surface wave transmission line is used. There is a problem that restrictions such as size, placement position, and quantity become large.

本発明は、上記従来の課題を解決するもので、周期構造体を用いた表面波伝送線路を備えた高周波加熱装置に於いて、表面波伝送線路へ高周波電力であるマイクロ波を直接供給すると共に、表面波伝送線路の幅が限定されず、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができる、高周波加熱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 in a high-frequency heating device provided with a surface wave transmission line using a periodic structure, it directly supplies microwaves, which are high-frequency power, to the surface wave transmission line. To provide a high-frequency heating device that does not limit the width of the surface wave transmission line and can minimize restrictions on the size, placement position, quantity, etc. of the object to be heated that can be heated by one surface wave transmission line. The purpose.

前記従来の課題を解決するため、本発明の高周波加熱装置は、被加熱物を設置する設置台と、前記設置台近傍に設置されて前記被加熱物を加熱し、表面波伝送線路で構成された加熱部と、高周波電力を発生させる高周波電力発生部と、前記加熱部に前記高周波電力発生部からの高周波電力を供給し、少なくとも一部が前記表面波伝送線路で構成された高周波電力供給部と、前記高周波電力発生部からの高周波電力を前記表面波伝送線路に導く導
波管と、を備え、前記導波管の断面の長辺寸法と、前記表面波伝送線路の前記導波管との接合部分のうち前記高周波電力発生部に最も近い接合部分の長辺寸法である幅寸法とがほぼ同じ長さで構成され、前記幅寸法とほぼ同じ長さである前記高周波電力供給部の表面波伝送線路幅から、前記加熱部の表面波伝送線路幅に向けて、徐々に前記表面波伝送線路幅の寸法を大きくしたものである。
In order to solve the above-mentioned conventional problems, the high-frequency heating device of the present invention is composed of an installation table on which an object to be heated is installed and a surface wave transmission line installed in the vicinity of the installation table to heat the object to be heated. A high-frequency power supply unit that supplies high-frequency power from the high-frequency power generation unit to the heating unit, a high-frequency power generation unit that generates high-frequency power, and a high-frequency power supply unit that is composed of at least a part of the surface wave transmission line. When the and a waveguide for guiding the high frequency power to the surface-wave transmission line from the high-frequency power generation section, the long side dimension of the cross section of the prior Kishirubeha tube, the waveguide of the surface-wave transmission line Of the joint portion with and, the width dimension which is the long side dimension of the joint portion closest to the high frequency power generation portion is configured to have substantially the same length, and the high frequency power supply portion has substantially the same length as the width dimension. from the surface-wave transmission line width, toward the surface wave transmission line width of the heating section it is gradually obtained by increasing the size of the surface-wave transmission line width.

この構成により、少なくとも１つの表面波伝送線路に於いて、高周波電力給電部の表面波伝送線路の幅寸法は、使用する高周波電力の周波数に適合した寸法にできるので、効率の良い高周波電力供給部を構成することができると共に、決められた高周波加熱装置の空間のなかで、加熱部の面積割合を大きくすることができるので、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができる。 With this configuration, in at least one surface wave transmission line, the width dimension of the surface wave transmission line of the high frequency power feeding unit can be adjusted to match the frequency of the high frequency power to be used, so that the efficient high frequency power supply unit can be used. The size and placement position of the object to be heated that can be heated by one surface wave transmission line can be increased because the area ratio of the heating unit can be increased in the specified space of the high-frequency heating device. , Quantity and other restrictions can be minimized.

この構成により、少なくとも１つの表面波伝送線路に於いて、高周波電力供給部の表面波伝送線路の幅寸法は、使用する高周波電力の周波数に適合する寸法にできるので、効率の良い高周波電力供給部を構成することができると共に、決められた高周波加熱装置の空間のなかで、加熱部の面積割合を大きくすることができるので、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができる。 With this configuration, in at least one surface wave transmission line, the width dimension of the surface wave transmission line of the high frequency power supply unit can be adjusted to match the frequency of the high frequency power used, so that the high frequency power supply unit is efficient. The size and placement position of the object to be heated that can be heated by one surface wave transmission line can be increased because the area ratio of the heating unit can be increased in the specified space of the high-frequency heating device. , Quantity and other restrictions can be minimized.

実施の形態１の高周波加熱装置の基本構成を示すブロック図Block diagram showing the basic configuration of the high frequency heating device of the first embodiment 実施の形態１の表面波伝送線路の形状を示す図The figure which shows the shape of the surface wave transmission line of Embodiment 1. （ａ）高周波電力供給部の構成を示す平面視ブロック図（ｂ）高周波電力供給部の構成を示す側面視ブロック図(A) Plane-view block diagram showing the configuration of the high-frequency power supply unit (b) Side-view block diagram showing the configuration of the high-frequency power supply unit 実施の形態２の高周波加熱装置の基本構成を示すブロック図Block diagram showing the basic configuration of the high frequency heating device of the second embodiment 実施の形態２の表面波伝送線路の形状を示す図The figure which shows the shape of the surface wave transmission line of Embodiment 2.

第１の発明は、被加熱物を設置する設置台と、前記設置台近傍に設置されて前記被加熱物を加熱し、表面波伝送線路で構成された加熱部と、高周波電力を発生させる高周波電力発生部と、前記加熱部に前記高周波電力発生部からの高周波電力を供給し、少なくとも一部が前記表面波伝送線路で構成された高周波電力供給部と、前記高周波電力発生部からの高周波電力を前記表面波伝送線路に導く導波管と、を備え、前記導波管の断面の長辺寸法と、前記表面波伝送線路の前記導波管との接合部分のうち前記高周波電力発生部に最も近い接合部分の長辺寸法である幅寸法とがほぼ同じ長さで構成され、前記幅寸法とほぼ同じ長さである前記高周波電力供給部の表面波伝送線路幅から、前記加熱部の表面波伝送線路幅に向けて、徐々に前記表面波伝送線路幅の寸法を大きくしたので、少なくとも１つの表面波伝送線路に於いて、高周波電力給電部の表面波伝送線路の幅寸法は、使用する高周波電力の周波数に適合した寸法にできるので、効率の良い高周波電力供給部を構成することができると共に、決められた高周波加熱装置の空間のなかで、加熱部の面積割合を大きくすることができるので、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができる。 The first invention is an installation table on which an object to be heated is installed, a heating unit installed near the installation table to heat the object to be heated, and a heating unit composed of a surface wave transmission line, and a high frequency wave for generating high frequency power. High-frequency power from the high-frequency power generation unit that supplies high-frequency power from the high-frequency power generation unit to the power generation unit and the heating unit, and at least a part of the high-frequency power supply unit is composed of the surface wave transmission line. the and a waveguide leading to the surface-wave transmission line, before the long side dimension of the cross section of Kishirubeha tube, the high frequency power generation section of the connecting portion between the waveguide of the surface-wave transmission line The width dimension, which is the long side dimension of the joint portion closest to the above, is configured to have substantially the same length, and the surface wave transmission line width of the high frequency power supply section, which is approximately the same length as the width dimension, is determined from the width of the heating portion. Since the size of the surface wave transmission line width is gradually increased toward the surface wave transmission line width, the width dimension of the surface wave transmission line of the high frequency power feeding unit is used in at least one surface wave transmission line. Since the dimensions can be adjusted to match the frequency of the high-frequency power to be used, an efficient high-frequency power supply unit can be configured, and the area ratio of the heating unit can be increased in the specified space of the high-frequency heating device. Therefore, restrictions such as the size, placement position, and quantity of the object to be heated that can be heated by one surface wave transmission line can be minimized.

第２の発明は、特に第１の発明において、前記高周波電力供給部を複数設置し、前記加熱部の複数方向から高周波電力を供給するので、１つの表面波伝送線路の加熱部の面積を大きくすることができると共に、加熱ムラの抑制や加熱領域の制御が可能となる。 In the second invention, particularly in the first invention, since a plurality of the high frequency power supply units are installed and high frequency power is supplied from a plurality of directions of the heating unit, the area of the heating unit of one surface wave transmission line is increased. At the same time, it is possible to suppress uneven heating and control the heating area.

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。なお、この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 this embodiment.

（実施の形態１）
図１は、本発明の実施の形態１における、高周波加熱装置１００を上方からみたときの基本構成を示すブロック図である。 (Embodiment 1)
FIG. 1 is a block diagram showing a basic configuration when the high frequency heating device 100 is viewed from above in the first embodiment of the present invention.

同図に示す高周波加熱装置１００は、設置台１０１に設置された被加熱物１０２を加熱処理する高周波加熱装置であって、加熱部１１０と、高周波電力発生部１２０と、高周波電力供給部１３０を備えている。加熱部１１０は、表面波伝送線路１１１の一部分で構成されている。なお、図１において、高周波加熱装置１００は、１つの表面波伝送線路と、１つの高周波電力発生部と、１つの高周波電力供給部を有しているが、表面波伝送線路、高周波電力発生部および高周波電力供給部の数はこれに限定されるものではない。 The high-frequency heating device 100 shown in the figure is a high-frequency heating device that heat-treats the object to be heated 102 installed on the installation table 101, and includes a heating unit 110, a high-frequency power generation unit 120, and a high-frequency power supply unit 130. I have. The heating unit 110 is composed of a part of the surface wave transmission line 111. In FIG. 1, the high-frequency heating device 100 has one surface wave transmission line, one high-frequency power generation unit, and one high-frequency power supply unit. However, the surface wave transmission line and the high-frequency power generation unit And the number of high frequency power supply units is not limited to this.

高周波電力発生部１２０で発生された高周波電力は、高周波電力供給部１３０を介して、加熱部１１０を構成する表面波伝送線路１１１へ供給される。 The high-frequency power generated by the high-frequency power generation unit 120 is supplied to the surface wave transmission line 111 constituting the heating unit 110 via the high-frequency power supply unit 130.

高周波電力発生部１２０は、被加熱物１０２を加熱処理するのに適した周波数（例えば、マイクロ波）とパワーを有する高周波電力を出力する高周波発信器である。したがって、例えば高周波電力発生部１２０は、マグネトロンとインバータ電源回路で構成してもよいし、固体発振器と電力増幅器で構成してもよい。 The high-frequency power generator 120 is a high-frequency transmitter that outputs high-frequency power having a frequency (for example, microwave) and power suitable for heat-treating the object to be heated 102. Therefore, for example, the high-frequency power generation unit 120 may be composed of a magnetron and an inverter power supply circuit, or may be composed of a solid-state oscillator and a power amplifier.

マグネトロンは、電波の一種である強力なノンコヒーレントマイクロ波を発生する発振用真空管の一種で、レーダーや電子レンジなどの数百ワット〜数キロワットの高出力用途に多く使われている。マグネトロンの駆動には数キロボルトの高電圧が必要である為、マ
グネトロンの駆動電源には一般的にインバータ電源が用いられる。インバータ電源は整流機能を有するコンバーター回路と、昇圧（もしくは降圧）機能と出力周波数変換機能を有するインバータ回路で構成された電源回路であり、照明装置やモーター制御に広く用いられている技術である。 A magnetron is a type of oscillating vacuum tube that generates strong non-coherent microwaves, which is a type of radio wave, and is often used in high-power applications of hundreds to several kilowatts such as radars and microwave ovens. Since a high voltage of several kilovolts is required to drive the magnetron, an inverter power supply is generally used as the drive power source for the magnetron. The inverter power supply is a power supply circuit composed of a converter circuit having a rectifying function and an inverter circuit having a step-up (or step-down) function and an output frequency conversion function, and is a technology widely used for lighting devices and motor control.

一方、固体発振器はトランジスタと、コンデンサ、インダクタ、抵抗器等の高周波電子部品で帰還回路を構成した半導体発振回路であり、通信機器等の小電力出力用途の発振器に広く用いられている技術である。固体発振器から出力される高周波電力は、近年では５０ワット程度の高出力のモノもあるが、一般的には数十ミリワット〜数百ミリワット程度であり、加熱処理用途に用いる為には数百ワットの出力パワーが必要であるので、一般的には、固体発振器から出力された高周波電力をトランジスタなどの電力増幅器で増幅する。 On the other hand, a solid-state oscillator is a semiconductor oscillator circuit in which a feedback circuit is composed of transistors and high-frequency electronic components such as capacitors, inductors, and resistors, and is a technology widely used in oscillators for low-power output applications such as communication equipment. .. In recent years, the high-frequency power output from a solid-state oscillator is about 50 watts, but it is generally about several tens of milliwatts to several hundreds of milliwatts, and it is several hundreds of watts for use in heat treatment applications. Since the output power of is required, generally, the high frequency power output from the solid-state oscillator is amplified by a power amplifier such as a transistor.

高周波電力供給部１３０は、高周波電力発生部１２０で発生された高周波電力を、表面波伝送線路１１１に給電する電力接続部に相当する。高周波電力供給部１３０の構成については後述する。 The high-frequency power supply unit 130 corresponds to a power connection unit that supplies high-frequency power generated by the high-frequency power generation unit 120 to the surface wave transmission line 111. The configuration of the high frequency power supply unit 130 will be described later.

表面波伝送線路１１１は、金属板で周期的にインピーダンス素子を配列した金属周期構造体や、誘電体板で形成される。例えば、金属周期構造体では、金属平板上に複数の金属平板を一定間隔で被加熱物に向けて立てる方向に並べたスタブ型表面波伝送線路や、金属平板を交叉指状に打ち抜いたインターデジタル型表面波伝送線路を用いることができ、誘電体板では、アルミナ板やベークライト板を用いることができる。 The surface wave transmission line 111 is formed of a metal periodic structure in which impedance elements are periodically arranged on a metal plate, or a dielectric plate. For example, in a metal periodic structure, a stub-type surface wave transmission line in which a plurality of metal flat plates are arranged on a metal flat plate in a direction of standing toward an object to be heated at regular intervals, or an interdigital in which metal flat plates are punched in a crossed finger shape A type surface wave transmission line can be used, and an alumina plate or a bakelite plate can be used as the dielectric plate.

表面波伝送線路１１１は、高周波電力供給部１３０を介して高周波電力発生部１２０より供給された高周波電力をその表面付近に集中させて伝送することができる。これにより、設置台１０１の近傍に表面波伝送線路１１１を設け、設置台１０１の上に被加熱物１０２を設置することにより、表面波伝送線路１１１によって表面付近に集中している高周波電力により、被加熱物１０２が加熱される。なお、本実施の形態においては、表面波伝送線路１１１を設置台１０１の下方に設けているが、設置台１０１の側方や上方に設けてもよい。 The surface wave transmission line 111 can concentrate the high-frequency power supplied from the high-frequency power generation unit 120 via the high-frequency power supply unit 130 and transmit it in the vicinity of the surface thereof. As a result, the surface wave transmission line 111 is provided in the vicinity of the installation table 101, and the object to be heated 102 is installed on the installation table 101. The object to be heated 102 is heated. In the present embodiment, the surface wave transmission line 111 is provided below the installation table 101, but it may be provided on the side or above the installation table 101.

ここで、本実施の形態に於ける表面波伝送線路１１１の形状について図を用いて説明する。 Here, the shape of the surface wave transmission line 111 in the present embodiment will be described with reference to the drawings.

図２は、本実施の形態に於ける表面波伝送線路１１１の形状を示した図である。 FIG. 2 is a diagram showing the shape of the surface wave transmission line 111 in the present embodiment.

本実施の形態に於ける表面波伝送線路１１１は、高周波電力供給部１３０に対応する線路幅寸法（Ｗｓ）に対して、加熱部１１０に対応する線路幅寸法（Ｗｈ）が大きくなっている。なお、高周波電力供給部１３０に対応する線路幅寸法（Ｗｓ）から、加熱部１１０に対応する線路幅寸法（Ｗｈ）に至る過程で、図面上では傾斜を設けて徐々に幅寸法を広げるように構成している。 In the surface wave transmission line 111 in the present embodiment, the line width dimension (Wh) corresponding to the heating unit 110 is larger than the line width dimension (Ws) corresponding to the high frequency power supply unit 130. In the process from the line width dimension (Ws) corresponding to the high frequency power supply unit 130 to the line width dimension (Wh) corresponding to the heating unit 110, an inclination is provided on the drawing so that the width dimension is gradually widened. It is configured.

図３は、高周波電力供給部１３０の構成の一例を示すブロック図である。 FIG. 3 is a block diagram showing an example of the configuration of the high frequency power supply unit 130.

図３（ａ）は上方（平面視）、図３（ｂ）は側方（側面視）から見た様子をそれぞれ示している。 FIG. 3A shows a view from above (planar view), and FIG. 3B shows a view from the side (side view).

同図では、図１で示した高周波電力発生部１２０としてマグネトロン１２１を用い、マグネトロン１２１で発生した高周波電力を方形導波管１３１を用いて高周波電力供給部１３０へ導いた場合の構成を示している。また、説明を簡易にするため、本実施の形態に於
いては、加熱に使用する高周波電力の周波数を、一般的に電子レンジなどで用いられている２４００ＭＨｚ〜２５００ＭＨｚとする。 FIG. 6 shows a configuration in which a magnetron 121 is used as the high-frequency power generation unit 120 shown in FIG. 1 and the high-frequency power generated by the magnetron 121 is guided to the high-frequency power supply unit 130 by using a rectangular waveguide 131. There is. Further, in order to simplify the explanation, in the present embodiment, the frequency of the high frequency power used for heating is set to 2400 MHz to 2500 MHz, which is generally used in a microwave oven or the like.

方形導波管１３１は、最も一般的な導波管であり、断面形状が方形（一般的には長方形）である金属製の管で、主にマイクロ波の伝送に用いられる中空導波管である。電磁波は、管の中に、その形状や寸法、波長もしくは周波数に応じた電磁界を形成しながら管の中を伝播する。 The square waveguide 131 is the most common waveguide, a metal tube having a rectangular (generally rectangular) cross-sectional shape, and is a hollow waveguide mainly used for microwave transmission. is there. Electromagnetic waves propagate in a tube while forming an electromagnetic field according to its shape, size, wavelength or frequency.

方形導波管１３１の断面の長辺寸法（Ｗｄ）で、導波管の中を伝播する電磁波の波長もしくは周波数が決まる。一般的には、ＪＩＳ（日本工業規格）やＥＩＡＪ（日本電子機械工業会）で、周波数に対応する方形導波管の寸法が規格化されており、２４００ＭＨｚ〜２５００ＭＨｚの周波数に対応する、方形導波管１３１の断面の長辺寸法（Ｗｄ）は１０９．２２ｍｍとされている。ここでは高周波電力供給部１３０は、方形導波管１３１の一部と表面波伝送線路１１１の一部とで構成されている。 The long side dimension (Wd) of the cross section of the rectangular waveguide 131 determines the wavelength or frequency of the electromagnetic wave propagating in the waveguide. Generally, JIS (Japanese Industrial Standards) and EIAJ (Japan Electronics and Information Technology Industries Association) standardize the dimensions of rectangular waveguides that correspond to frequencies, and square guides that correspond to frequencies of 2400 MHz to 2500 MHz. The long side dimension (Wd) of the cross section of the waveguide 131 is 109.22 mm. Here, the high-frequency power supply unit 130 is composed of a part of the rectangular waveguide 131 and a part of the surface wave transmission line 111.

方形導波管１３１により、マグネトロン１２１から伝播された高周波電力を表面波伝送線路１１１に供給するためには、方形導波管１３１の断面の長辺寸法（Ｗｄ）と、表面波伝送線路１１１の接合部分の長辺寸法である幅寸法（Ｗｓ）を略同寸法にすることで、最も接合部での反射が小さくなり、効率が最も大きくなる。従って、使用する高周波電力の周波数を２４００ＭＨｚ〜２５００ＭＨｚとして、標準規格の方形導波管を用いて高周波電力を高周波電力供給部１３０に導いた場合、方形導波管１３１の断面の長辺寸法（Ｗｄ）は１０９．２２ｍｍであるので、表面波伝送線路１１１の接合部分の幅寸法もほぼ１０９．２２ｍｍにするのが、高周波電力の表面波伝送線路１１１への供給効率が最も大きくなる。 In order to supply the high frequency power propagated from the magnetron 121 to the surface wave transmission line 111 by the square waveguide 131, the long side dimension (Wd) of the cross section of the square waveguide 131 and the surface wave transmission line 111 By making the width dimension (Ws), which is the long side dimension of the joint portion, substantially the same, the reflection at the joint portion is minimized and the efficiency is maximized. Therefore, when the frequency of the high-frequency power to be used is 2400 MHz to 2500 MHz and the high-frequency power is guided to the high-frequency power supply unit 130 using the standard square waveguide, the long side dimension (Wd) of the cross section of the square waveguide 131. ) Is 109.22 mm, so that the width dimension of the junction portion of the surface wave transmission line 111 is also approximately 109.22 mm, which maximizes the efficiency of supplying high-frequency power to the surface wave transmission line 111.

以上のような構成により、本実施の形態に係る高周波加熱装置１００は、高周波電力発生部１２０で発生された高周波電力を、高周波電力供給部１３０を介して、加熱部１１０を構成する表面波伝送線路１１１に供給することにより、加熱部１１０を構成する、表面波伝送線路１１１の近傍に設けた設置台１０１の上に設置された被加熱物１０２に加熱処理を施すことができる。 With the above configuration, the high-frequency heating device 100 according to the present embodiment transmits the high-frequency power generated by the high-frequency power generation unit 120 to the surface wave transmission of the heating unit 110 via the high-frequency power supply unit 130. By supplying the power to the line 111, it is possible to heat the object to be heated 102 installed on the installation table 101 provided in the vicinity of the surface wave transmission line 111, which constitutes the heating unit 110.

また、表面波伝送線路１１１は、高周波電力供給部１３０に対応する線路幅寸法（Ｗｓ）に対して、加熱部１１０に対応する線路幅寸法（Ｗｈ）が大きくなっているので、高周波電力供給部１３０に対応する線路幅寸法（Ｗｓ）が独立に決定することができ、効率の良い高周波電力供給部を構成することができると共に、１つの表面波伝送線路の加熱部の面積を大きくすることができるので、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができる。なお、図２のとおり、高周波電力供給部１３０に対応する線路幅寸法（Ｗｓ）の線路幅方向と、高周波電力供給部１３０に対応する線路幅寸法（Ｗｓ）の線路幅方向は同方向である。 Further, since the surface wave transmission line 111 has a larger line width dimension (Wh) corresponding to the heating unit 110 than the line width dimension (Ws) corresponding to the high frequency power supply unit 130, the high frequency power supply unit The line width dimension (Ws) corresponding to 130 can be determined independently, an efficient high frequency power supply unit can be configured, and the area of the heating unit of one surface wave transmission line can be increased. Therefore, restrictions such as the size, placement position, and quantity of the object to be heated that can be heated by one surface wave transmission line can be minimized. As shown in FIG. 2, the line width direction of the line width dimension (Ws) corresponding to the high frequency power supply unit 130 and the line width direction of the line width dimension (Ws) corresponding to the high frequency power supply unit 130 are the same direction. ..

また、図１における高周波加熱装置１００は、一般的な調理用の電子レンジと同様の基本構成としてもよい。すなわち、略直方体状の筐体内部に被加熱物を加熱する加熱室を設け、加熱室内に高周波電力を供給するマグネトロンなどで構成される高周波電力発生部を筐体下部や筐体側部に設け、高周波電力発生部のマイクロ波が加熱室内に供給される導波管をさらに設け、加熱室の下部や背部あるいは上部に加熱部を設け、さらには加熱室を開閉するためのドアを筐体前面に設置し、ドアの周囲に電磁波漏れを防止するためのドアチョーク溝を設けるといった全体構造としてもよい。 Further, the high-frequency heating device 100 in FIG. 1 may have the same basic configuration as a general cooking microwave oven. That is, a heating chamber for heating the object to be heated is provided inside the substantially rectangular housing, and a high-frequency power generating portion composed of a magnetron or the like for supplying high-frequency power to the heating chamber is provided at the lower part of the housing or the side of the housing. A waveguide for supplying microwaves from the high-frequency power generator to the heating chamber is further provided, a heating portion is provided at the lower part, the back or the upper part of the heating chamber, and a door for opening and closing the heating chamber is provided on the front surface of the housing. It may be installed and the overall structure may be such that a door choke groove for preventing electromagnetic wave leakage is provided around the door.

（実施の形態２）
以下、本発明の実施の形態２を、図面を参照しながら説明する。 (Embodiment 2)
Hereinafter, Embodiment 2 of the present invention will be described with reference to the drawings.

なお、本実施の形態２の説明において、前述の実施の形態１と同じ機能を有する構成要素には同じ参照符号を付し、説明を省略する。また、前述の実施の形態１と同じ作用を有する内容についても、説明を省略する。 In the description of the second embodiment, the same reference numerals are given to the components having the same functions as those of the first embodiment, and the description thereof will be omitted. Further, the description of the content having the same function as that of the first embodiment will be omitted.

図４は、本発明の実施の形態２に係る、高周波加熱装置２００の構成を示すブロック図である。 FIG. 4 is a block diagram showing the configuration of the high frequency heating device 200 according to the second embodiment of the present invention.

同図に示す高周波加熱装置２００は、図１に示した実施の形態１に係る高周波加熱装置１００と比較して、加熱部１１０に代わり加熱部２１０を備え、表面波伝送線路１１１に代わり表面波伝送線路２１１を備え、高周波電力発生部１２０に代わり第１の高周波電力発生部２２０ａおよび第２の高周波電力発生部２２０ｂを略対称位置に備え、高周波電力供給部１３０に代わり第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂを略対称位置に備える。 Compared with the high frequency heating device 100 according to the first embodiment shown in FIG. 1, the high frequency heating device 200 shown in the figure includes a heating unit 210 instead of the heating unit 110, and has a surface wave instead of the surface wave transmission line 111. A transmission line 211 is provided, a first high-frequency power generation unit 220a and a second high-frequency power generation unit 220b are provided at substantially symmetrical positions in place of the high-frequency power generation unit 120, and a first high-frequency power supply is provided in place of the high-frequency power supply unit 130. The unit 230a and the second high-frequency power supply unit 230b are provided at substantially symmetrical positions.

すなわち、図４において、第１の高周波電力発生部２２０ａおよび第２の高周波電力発生部２２０ｂ、第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂは、高周波電力発生部から加熱部に高周波電力が流れる方向（図４での水平方向）と垂直の方向に対し、略対称位置に配置されている。したがって、第１の高周波電力発生部２２０ａから加熱部２１０へ流れる高周波電力の方向と、第２の高周波電力発生部２２０ｂから加熱部２１０へ流れる高周波電力の方向とは、逆方向すなわち高周波電力の方向は複数方向となる。 That is, in FIG. 4, the first high-frequency power generation unit 220a and the second high-frequency power generation unit 220b, the first high-frequency power supply unit 230a and the second high-frequency power supply unit 230b are from the high-frequency power generation unit to the heating unit. It is arranged at a position substantially symmetrical with respect to the direction perpendicular to the direction in which high-frequency power flows (horizontal direction in FIG. 4). Therefore, the direction of the high frequency power flowing from the first high frequency power generating unit 220a to the heating unit 210 and the direction of the high frequency power flowing from the second high frequency power generating unit 220b to the heating unit 210 are opposite directions, that is, the direction of the high frequency power. Is in multiple directions.

なお、図４において、高周波加熱装置２００は、１つの表面波伝送線路と、２つの高周波電力発生部と、２つの高周波電力供給部を有しているが、表面波伝送線路、高周波電力発生部および高周波電力供給部の数はこれに限定されるものではない。 In FIG. 4, the high-frequency heating device 200 has one surface wave transmission line, two high-frequency power generation units, and two high-frequency power supply units. However, the surface wave transmission line and the high-frequency power generation unit And the number of high frequency power supply units is not limited to this.

第１の高周波電力発生部２２０ａで発生された高周波電力は、第１の高周波電力供給部２３０ａを介して、第２の高周波電力発生部２２０ｂで発生された高周波電力は、第２の高周波電力供給部２３０ｂを介して、加熱部２１０を構成する表面波伝送線路２１１へそれぞれ供給される。即ち、表面波伝送線路２１１に２つの高周波電力が供給される。なお、第１の高周波電力発生部２２０ａおよび第２の高周波電力発生部２２０ｂと、第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂの構成は、前述した実施の形態１で説明した、高周波電力発生部１２０と高周波電力供給部１３０の構成と同一であるので、説明は省略する。 The high-frequency power generated by the first high-frequency power generation unit 220a is supplied via the first high-frequency power supply unit 230a, and the high-frequency power generated by the second high-frequency power generation unit 220b is supplied by the second high-frequency power supply unit 220b. It is supplied to the surface wave transmission line 211 constituting the heating unit 210 via the unit 230b. That is, two high-frequency powers are supplied to the surface wave transmission line 211. The configurations of the first high-frequency power generation unit 220a and the second high-frequency power generation unit 220b, and the first high-frequency power supply unit 230a and the second high-frequency power supply unit 230b will be described in the above-described first embodiment. Since the configuration is the same as that of the high-frequency power generation unit 120 and the high-frequency power supply unit 130, the description thereof will be omitted.

ここで、本実施形態に於ける表面波伝送線路２１１の形状について図を用いて説明する。 Here, the shape of the surface wave transmission line 211 in the present embodiment will be described with reference to the drawings.

図５は、本実施形態に於ける表面波伝送線路２１１の形状を示した図である。 FIG. 5 is a diagram showing the shape of the surface wave transmission line 211 in the present embodiment.

本実施の形態に於ける表面波伝送線路２１１は、第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂに対応する線路幅寸法（Ｗｓ）に対して、加熱部２１０に対応する線路幅寸法（Ｗｈ）が大きくなっている。 The surface wave transmission line 211 in the present embodiment corresponds to the heating unit 210 with respect to the line width dimension (Ws) corresponding to the first high frequency power supply unit 230a and the second high frequency power supply unit 230b. The line width dimension (Wh) is large.

なお、高周波電力供給部２３０ａに対応する線路幅寸法（Ｗｓ）から、加熱部２１０に対応する線路幅寸法（Ｗｈ）に至る過程で、図面上では傾斜を設けて徐々に幅寸法を広げるように構成している。同様に、高周波電力供給部２３０ｂに対応する線路幅寸法（Ｗｓ）から、加熱部２１０に対応する線路幅寸法（Ｗｈ）に至る過程で、図面上では傾斜を設けて徐々に幅寸法を広げるように構成している。 In the process from the line width dimension (Ws) corresponding to the high frequency power supply unit 230a to the line width dimension (Wh) corresponding to the heating unit 210, an inclination is provided on the drawing so that the width dimension is gradually widened. It is configured. Similarly, in the process from the line width dimension (Ws) corresponding to the high-frequency power supply unit 230b to the line width dimension (Wh) corresponding to the heating unit 210, an inclination is provided on the drawing to gradually increase the width dimension. It is configured in.

以上のような構成により、本実施形態に係る高周波加熱装置２００は、第１の高周波電力発生部２２０ａおよび第２の高周波電力発生部２２０ｂで発生された高周波電力を、第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂを介して、加熱部２１０を構成する表面波伝送線路２１１にそれぞれ供給することにより、加熱部２１０を構成する、表面波伝送線路２１１の近傍に設けた設置台１０１の上に設置された被加熱物１０２に加熱処理を施すことができる。 With the above configuration, the high-frequency heating device 200 according to the present embodiment uses the high-frequency power generated by the first high-frequency power generation unit 220a and the second high-frequency power generation unit 220b as the first high-frequency power supply unit. Installation provided in the vicinity of the surface wave transmission line 211 constituting the heating unit 210 by supplying the surface wave transmission line 211 constituting the heating unit 210 via the 230a and the second high frequency power supply unit 230b, respectively. The object to be heated 102 installed on the table 101 can be heat-treated.

また、表面波伝送線路２１１は、第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂに対応する線路幅寸法（Ｗｓ）に対して、加熱部１１０に対応する線路幅寸法（Ｗｈ）が大きくなっているので、第１の高周波電力供給部２３０ａおよび第２の高周波電力供給部２３０ｂに対応する線路幅寸法（Ｗｓ）は独立に決定でき、効率の良い高周波電力供給部を構成することができると共に、１つの表面波伝送線路の加熱部の面積を大きくすることができるので、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができる。 Further, the surface wave transmission line 211 has a line width dimension (Wh) corresponding to the heating unit 110 with respect to a line width dimension (Ws) corresponding to the first high frequency power supply unit 230a and the second high frequency power supply unit 230b. ) Is large, so that the line width dimension (Ws) corresponding to the first high frequency power supply unit 230a and the second high frequency power supply unit 230b can be independently determined, and constitutes an efficient high frequency power supply unit. Since the area of the heating part of one surface wave transmission line can be increased, restrictions such as the size, placement position, and quantity of the object to be heated that can be heated by one surface wave transmission line can be minimized. be able to.

さらに、表面波伝送線路２１１は、２つの高周波電力供給部２３０ａおよび２３０ｂを備え、２つの高周波電力を供給することができるので、加熱ムラの抑制や加熱領域の制御が可能となり、加熱仕上がり品質を向上することができる。 Further, since the surface wave transmission line 211 is provided with two high-frequency power supply units 230a and 230b and can supply two high-frequency power, it is possible to suppress uneven heating and control the heating region, and to improve the quality of the heated finish. Can be improved.

ここで、図４の高周波加熱装置２００では、表面波伝送線路２１１に対して、２つの高周波電力供給部２３０ａおよび２３０ｂを対向する端面に略対称に配置するよう記載しているが、表面波伝送線路に対する高周波電力供給部の位置はその他の位置でも構わない。 Here, in the high-frequency heating device 200 of FIG. 4, it is described that the two high-frequency power supply units 230a and 230b are arranged substantially symmetrically on the opposite end faces with respect to the surface wave transmission line 211, but the surface wave transmission The position of the high-frequency power supply unit with respect to the line may be any other position.

また、図４の高周波加熱装置２００では、２つの高周波電力供給部２３０ａおよび２３０ｂのそれぞれに対応した２つの高周波電力発生部２２０ａおよび２２０ｂを備えるよう記載しているが、図示はしないが、１つの高周波電力発生部の出力をウィルキンソンカップラーやハイブリッドカップラーなどの電力分配器により分配して、２つの高周波電力供給部２３０ａおよび２３０ｂを介して表面波伝送線路２１１に供給してもよい。 Further, the high-frequency heating device 200 of FIG. 4 is described to include two high-frequency power generating units 220a and 220b corresponding to the two high-frequency power supply units 230a and 230b, respectively, but one is not shown. The output of the high frequency power generation unit may be distributed by a power distributor such as a Wilkinson coupler or a hybrid coupler and supplied to the surface wave transmission line 211 via the two high frequency power supply units 230a and 230b.

以上、本発明に係る高周波加熱装置について、各実施形態に基づき説明したが、本発明はこの実施形態に限定されるものではない。本発明の趣旨を逸脱しない限り、当業者が思いつく各種変形を当該実施形態に施したものや、異なる実施の形態における構成要素を組み合わせて構築される形態も、本発明の範囲内に含まれる。 The high-frequency heating device according to the present invention has been described above based on each embodiment, but the present invention is not limited to this embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the embodiment, and a form constructed by combining components in different embodiments is also included in the scope of the present invention.

本発明は、表面波伝送線路に高周波電力を供給することにより被加熱物を加熱処理する高周波加熱装置において、効率の良い高周波電力供給部を構成することができると共に、１つの表面波伝送線路の加熱部の面積を大きくすることができ、１つの表面波伝送線路で加熱できる被加熱物の大きさや置き位置、数量等の制約を極力小さくすることができるため、マイクロ波加熱機などの調理家電等として有用である。 INDUSTRIAL APPLICABILITY According to the present invention, in a high-frequency heating device that heat-treats an object to be heated by supplying high-frequency power to a surface wave transmission line, an efficient high-frequency power supply unit can be configured, and one surface wave transmission line can be provided. Since the area of the heating part can be increased and the restrictions on the size, placement position, quantity, etc. of the object to be heated that can be heated by one surface wave transmission line can be minimized, cooking appliances such as microwave heaters can be used. It is useful as such.

１００、２００ 高周波加熱装置
１０１ 設置台
１０２ 被加熱物
１１０，２１０ 加熱部
１１１，２１１ 表面波伝送線路
１２０，２２０ａ，２２０ｂ 高周波電力発生部
１２１ マグネトロン
１３０，２３０ａ，２３０ｂ 高周波電力供給部
１３１ 方形導波管 100, 200 High-frequency heating device 101 Installation stand 102 Heated object 110,210 Heating unit 111,211 Surface wave transmission line 120, 220a, 220b High-frequency power generation unit 121 Magnetron 130, 230a, 230b High-frequency power supply unit 131 Square waveguide

Claims (2)

被加熱物を設置する設置台と、
前記設置台近傍に設置されて前記被加熱物を加熱し、表面波伝送線路で構成された加熱部と、
高周波電力を発生させる高周波電力発生部と、
前記加熱部に前記高周波電力発生部からの高周波電力を供給し、少なくとも一部が前記表面波伝送線路で構成された高周波電力供給部と、
前記高周波電力発生部からの高周波電力を前記表面波伝送線路に導く導波管と、を備え、
前記導波管の断面の長辺寸法と、前記表面波伝送線路の前記導波管との接合部分のうち前記高周波電力発生部に最も近い接合部分の長辺寸法である幅寸法とがほぼ同じ長さで構成され、
前記幅寸法とほぼ同じ長さである前記高周波電力供給部の表面波伝送線路幅から、前記加熱部の表面波伝送線路幅に向けて、徐々に前記表面波伝送線路幅の寸法を大きくした、高周波加熱装置。 An installation stand for installing the object to be heated and
A heating unit that is installed near the installation table and heats the object to be heated, and is composed of a surface wave transmission line.
A high-frequency power generator that generates high-frequency power,
A high-frequency power supply unit that supplies high-frequency power from the high-frequency power generation unit to the heating unit and is composed of at least a part of the surface wave transmission line.
A waveguide that guides high-frequency power from the high-frequency power generation unit to the surface wave transmission line is provided.
Almost a long side dimension of the cross section of the prior Kishirubeha tube, and a width dimension that is long side dimension nearest junction to said high-frequency power generation section of the connecting portion between the waveguide of the surface-wave transmission line Consists of the same length,
The size of the surface wave transmission line width was gradually increased from the surface wave transmission line width of the high frequency power supply unit to the surface wave transmission line width of the heating unit, which is substantially the same length as the width dimension. High frequency heating device. 前記高周波電力供給部を複数設置し、前記加熱部の複数方向から高周波電力を供給する、請求項１に記載の高周波加熱装置。
The high-frequency heating device according to claim 1, wherein a plurality of the high-frequency power supply units are installed and high-frequency power is supplied from a plurality of directions of the heating units.
JP2016129558A 2016-06-30 2016-06-30 High frequency heating device Active JP6861332B2 (en)

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JPS5112443A (en) * 1974-07-22 1976-01-31 Matsushita Electric Ind Co Ltd KOSHUHAKANETSUKI
JPH08166133A (en) * 1994-12-12 1996-06-25 New Japan Radio Co Ltd High frequency thawing heater
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