JP3631211B2 - Microwave furnace for high temperature and support used for it - Google Patents

Microwave furnace for high temperature and support used for it Download PDF

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Publication number
JP3631211B2
JP3631211B2 JP2002033992A JP2002033992A JP3631211B2 JP 3631211 B2 JP3631211 B2 JP 3631211B2 JP 2002033992 A JP2002033992 A JP 2002033992A JP 2002033992 A JP2002033992 A JP 2002033992A JP 3631211 B2 JP3631211 B2 JP 3631211B2
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Japan
Prior art keywords
heat insulating
support
insulating material
heated
microwave
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JP2002033992A
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JP2003243145A (en
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恒夫 桐山
晃彦 根岸
正人 大沢
安雄 三須
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Saint Gobain TM KK
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Saint Gobain TM KK
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Description

【0001】
【産業上の利用分野】
本発明は、高温用マイクロ波加熱炉と、それに使用する支持体および棚板部材に関する。
【0002】
【従来の技術】
マイクロ波加熱は、マイクロ波電力を誘電体の被加熱物に吸収させて誘電体の被加熱物の内部より自己発熱させる方法である。
【0003】
このため、ガス、電気抵抗等を熱源とした、熱伝導や輻射による従来の加熱方式に比べて、マイクロ波加熱は、急速加熱が可能となり、しかも熱効率が高いため短時間で加熱処理を行うことができる。
【0004】
この原理を応用して、マイクロ波加熱は、ゴムの加熱加硫装置や木材の接着乾燥装置に広く利用されている。
【0005】
また、これら低温用途の他に、高温用途としてセラミックや陶器等の焼成用のマイクロ波加熱炉が特公昭59−25937号公報に記載されている。電子レンジを利用して焼成を行う焼成炉が特開平7−318262号公報に記載されている。このような高温用途においては、被加熱物の自己発熱によって発生した熱を放散させないように、被加熱物を断熱材で囲む必要がある。
【0006】
高温用途のマイクロ波加熱炉は、主に、マイクロ波発振装置、マイクロ波の発振口である導波管、マイクロ波をなるべく均等に分散させるためのファン、マイクロ波の漏洩を防ぐ遮蔽体としてのケーシング、及び断熱材からなる。
【0007】
上記公報に示すような、これまでの高温用途のマイクロ波加熱炉は、小型であった。そのため、被加熱物を囲んで構成する閉空間(炉内)を断熱材で構築する際に、側壁、天井部分をほぼ一体に成形した単体の断熱材を用いることができた。その結果、断熱材を支持するための支持体は特に必要がなかった。即ち、一体に成形した単体の断熱材は、そのままで力学的に安定に自立することができた。
【0008】
しかし、炉を大型化する場合、炉内に広い閉空間が必要になる。この広い空間を構築するためには、複数の断熱材を組み合わせて壁や天井部分を構成する必要が生じた。その結果、複数の断熱材を支持し、固定する必要が生じた。
【0009】
一方、従来のガス、電気抵抗等を熱源とした加熱方式の大型炉においては、断熱材の固定方法としては、棒状あるいは爪状の金属製支持体を介して、外枠を兼ねた強度のある金属製ケーシングに断熱部材を固定する方法が一般的である。
【0010】
また、金属は、マイクロ波の一部を吸収して熱を発生するが、マイクロ波の大部分を反射する性質を持つ。この性質は必要に応じて使い分けられている。例えば、一般の電子調理器、またマイクロ波を熱源とした加熱炉では、マイクロ波が金属によって反射する性質を利用して、金属で調理器や炉全体を囲い、炉外ヘマイクロ波が漏れないようにして危険防止を図っている。
【0011】
【発明が解決しようとする課題】
高温のマイクロ波加熱を行うためには、次のことが必要である。
【0012】
a)被加熱物を断熱材で覆い、断熱材の外側にマイクロ波発振器及び導波管を配置しなければならない。つまり、断熱材の使用により、被加熱物自身から発生する熱を、断熱材の内側に閉じこめて、被加熱物を高温に保つと共に、断熱材の外側を低温に保ち、被加熱物から発生する熱でマイクロ波発振器及び導波管が損傷しないようにするためである。従って内側より、被加熱物、断熱材、発振器及び導波管の順で設けることが必要となる。
【0013】
b)産業界では、現在、炉の大型化の要請があるが、炉の大型化に伴って、従来のように大型の断熱材を成形段階で一体に成形するのは困難である。分割またはモジュール化した多数の小さな断熱材をそれぞれ自立させるか、または安定的に支持して固定する構造が求められる。
【0014】
c)一方、マイクロ波は発振器から導波管を通して発振され、断熱材を透過して、効率よく被加熱物に達する必要がある。従って、少なくとも導波管と被加熱物の間には、それを妨げるような部材を配置することは避ける必要がある。また、自身が溶損などして本来の機能を失うような部材を配置することは避ける必要がある。例えば、金属製の板、支持体等はそのままでは配置すべきではない。
【0015】
d)断熱材は、マイクロ波による被加熱物の発熱を妨げないような材質、つまり、マイクロ波に対して透過性の優れた材質であることが必要である。
【0016】
e)人体に対して安全性を高めるため、マイクロ波が炉の外側に漏れ出ることは防止しなければならない。即ち、少なくとも断熱材の外側を覆い、閉空間を作る金属製ケーシングが必要である。
【0017】
本発明の課題は、マイクロ波を熱源とし、高温かつ大型にすることができる高温用マイクロ波加熱炉と、それに使用する支持体を提供することある。
【0018】
【課題を解決するための手段】
本発明の解決手段を例示すると、各請求項に記載の高温用マイクロ波加熱炉とそれに使用する支持体である。
【0019】
【発明の実施の形態】
本発明は、マイクロ波を加熱源として用いる高温用マイクロ波加熱炉を改良したものである。内側より順に、被加熱物、断熱材、金属製ケーシングが配置される。断熱材は被加熱物を囲うように設けられる。断熱材は、断熱部材(好ましくは複数個の断熱部材)で構成される。支持体は、非金属かつ無機質材料からなる。
【0020】
支持体は、導波管よりも内側に安全に配する。マイクロ波透過性及び耐熱性に優れ、高温での強度があり、成形や加工が容易な支持体とする。この支持体の材料として、非金属かつ無機質材料を選択する。
【0021】
好ましくは、高温用マイクロ波加熱炉用の支持体および棚板部材は、誘電損失が被加熱物と同じか、または被加熱物よりも小さいものにする。さらに、支持体は、アルミナ質、ムライト質、ステアタイト質、ジルコン質、コーディエライト質、シリカ質、石英、炭化ケイ素、窒化ケイ素等の材料のうち1種以上を選択したものからなる耐火物で作るのが好ましい。
【0022】
本発明における断熱材用の支持体の材料としては、マイクロ波透過性及び耐熱性に優れ、高温での強度があり、加工が容易である、非金属かつ無機質の材料が適している。さらに、マイクロ波の透過、反射、吸収を考えた場合、マイクロ波の透過性に優れた材料は、言い換えればマイクロ波を反射、吸収しにくい性質を持っているものである。その性質を表すひとつの要素として誘電損失がある。誘電損失が大きい材料は、マイクロ波を吸収しやすく、その結果、材料の発熱量が多くなる。従って高温用のマイクロ波加熱炉においては、被加熱物よりも誘電損失の大きい材料は、被加熱物よりも発熱しやすく、従って被加熱物よりも高温になってしまい、高温で必要な強度を維持できなくなり、また、変形しやすくなる。つまり、炉の最高使用温度を低下させることになる。また、このような支持体が被加熱物の近くにあれば、支持体からの熱の影響を受け、被加熱物の正確な温度制御が困難となる。さらに、マイクロ波が、被加熱物に届く前に支持体に吸収されてしまい、被加熱物の発熱効率が悪くなるため好ましくない。つまり、高温用のマイクロ波加熱炉においては、断熱材を支持する支持体は、その誘電損失が被加熱物と同じか、または被加熱物よりも小さいことが好ましい。例えば、被加熱物がムライトである場合は、支持体は、ムライトまたはアルミナが好ましい材料であり、被加熱物がアルミナである場合には、支持体は、アルミナで作るのが好ましい。
【0023】
支持体は、断面の形状、断面の幅、径等は任意のものでよい。ただし、幅、径が小さすぎると、支持体としての強度が不足し、大きすぎると、支持体にマイクロ波が吸収される量が多くなり、被加熱物を効率よく加熱できなくなる。支持体は、材料の入手のしやすさ、価格、加工性、施工性を考慮することが好ましい。支持体の形としては、チューブ状が最も好ましいものとして採用できる。
【0024】
側壁を構成する断熱部材に対しては、対向面に位置する金属製ケーシング側面の一方の側から、対向する他方の側面に支持体を渡して、断熱材を支持体により支持する。さらに、支持体は、金属製ケーシングと接した部分で支持されて固定される。この場合、支持体は、少なくとも、上述のケーシングの側面間の距離を渡すことのできる長尺の支持体が適している。長尺支持体は、少なくともその一部で断熱部材の外側または表面を支持すれば良い。また、支持体で断熱部材を貫通して支持しても良い。
【0025】
さらに、複数の断熱部材は、支持体貫通した形で一体とした断熱材の形にすることができる。この場合、支持体は、短くてよく、たとえば少なくとも隣り合う断熱部材を支持して一体とすることができる程度の長さの短尺支持体が適している。支持体の長さは、一体としたい断熱部材の大きさや数量に応じて決めることができる。
【0026】
天井部分に配置する断熱材は、複数個の断熱部材で構成したアーチの端部を、側壁断熱材の上端で支持する構造が適している。複数個の断熱部材をせり合わせてアーチ構造とし、アーチの両端を、側壁断熱材の上端部分で支持することで、この場合、支持体なしで天井部分の断熱材(天井部分の炉壁)を構成できる。
【0027】
また、天井部分の断熱材は、アーチ構造とせず、断熱部材を長尺支持体で貫通し、長尺支持体を金属製ケーシングで固定する方法でも良い。
【0028】
また、側壁断熱材の外側と導波管の間には空間を設け、空気流の自然対流によって、支持体を自然冷却することが好ましい。
【0029】
断熱材は、側壁と天井のいずれにおいても、多数の断熱部材を組み合わせて組立てたものとするのが好ましい。断熱部材は、種々のものを採用できる。
【0030】
【実施例】
アルミナ繊維、無機粉体、結合材を水で分散させたスラリーを作り、そのスラリーをモールドを用いて真空成形して、厚さ75mmのボード状の断熱部材1を得る。それらの断熱部材1を断熱部材の厚さ方向に積層し、その積層方向が床と平行な方向になるようにして、側壁断熱材を構成する。側壁断熱材の外側の面に接するように、支持体として、外径35mmのアルミナチューブ2を側壁断熱材の積層方向と同方向に配して、それらのアルミナチューブ2により側壁断熱材を支持した。
【0031】
アルミナチューブ2は、金属製ケーシング3の一方の側から、対向する他方の側面に渡した。アルミナチューブ2の端部は、金属製ケーシング3に開けた穴に差し込んで固定した。金属製ケーシング3は、金属製台座4の部分を除き、6面について側壁の断熱材1と、天井部分の断熱材1を囲むように配した。
【0032】
天井部分の断熱材1は、ボード状の断熱部材1を、加工後にせり合わせてアーチ状としたものを使用し、断熱部材1の厚さ方向に積層し、その方向が床と平行となるようにして天井部分の断熱材1を構成した。このとき、アーチ状天井部分の両端部は側壁断熱材1の上端によって支持されている構造とした。断熱材1で囲む閉空間(炉内)は、幅1140mm、長さ1140mm、有効高さ375mmであった。
【0033】
炉の床部分は、金属製台座4の上にボード状断熱部材1とアルミナ耐火物5を敷き、金属製台座4は昇降する構造とした。この昇降構造は従来のものを採用できる。さらに、側壁断熱材1及び天井部分の断熱材1と、金属製ケーシング3との間は、約200mmの間隔を設け、空気流の自然対流で冷却できる構造とした。
【0034】
炉内には、3×200×200mmのアルミナ板状の棚板部材10と、外径35mm、高さ50mmのアルミナチューブ状棚板部材11を組み合わせて使用し、棚板部材として構成して配置した。
【0035】
図示例のマイクロ波加熱炉で、被加熱物として陶磁器材料を1300℃で加熱したところ、陶磁器材料に歪みや割れを生じることなく加熱できた。また、支持体は、断熱材を安全に支持して固定できた。棚板部材は、被加熱物を安定的に支持することができた。
【0036】
【発明の効果】
本発明によれば、非金属かつ無機質材料からなる支持体を使用するので、支持体は、マイクロ波透過性及び耐熱性に優れ、高温での強度があり、加工が容易である。
【0037】
高温用マイクロ波加熱炉において、このような支持体を導波管よりも内側に配して、複数の断熱部材を組み合わせて支持体により支持すると、断熱材を安全に支持して、固定でき、高温用マイクロ波加熱炉を大型化することが容易である。
【図面の簡単な説明】
【図1】本発明による高温用マイクロ波加熱炉の一例を示す概略説明図。
【符号の説明】
1 断熱材(断熱部材)
2 アルミナチューブ
3 金属製ケーシング
4 金属製台座
5 アルミナ耐火物
6 被加熱物
7 マイクロ波発振器
8 導波管
9 高温用マイクロ波加熱炉
10 アルミナ板状の棚板部材
11 アルミナチューブ状の棚板部材
[0001]
[Industrial application fields]
The present invention relates to a high-temperature microwave heating furnace, and a support and a shelf member used therefor.
[0002]
[Prior art]
Microwave heating is a method in which microwave power is absorbed by a dielectric object to be heated and self-heated from inside the dielectric object.
[0003]
For this reason, compared to conventional heating methods using heat conduction or radiation using gas, electrical resistance, etc. as a heat source, microwave heating enables rapid heating, and heat treatment is performed in a short time due to high thermal efficiency. Can do.
[0004]
By applying this principle, microwave heating is widely used in rubber heating vulcanization equipment and wood adhesion drying equipment.
[0005]
In addition to these low temperature applications, Japanese Patent Publication No. 59-25937 discloses a microwave heating furnace for firing ceramics and earthenware as a high temperature application. A firing furnace that performs firing using a microwave oven is described in Japanese Patent Application Laid-Open No. 7-318262. In such a high temperature application, it is necessary to surround the heated object with a heat insulating material so as not to dissipate the heat generated by the self-heating of the heated object.
[0006]
Microwave furnaces for high-temperature applications are mainly used as microwave oscillators, waveguides that serve as microwave oscillation ports, fans for dispersing microwaves as evenly as possible, and shields that prevent leakage of microwaves. It consists of a casing and a heat insulating material.
[0007]
Conventional microwave heating furnaces for high temperature applications as shown in the above publication have been small. Therefore, when a closed space (inside the furnace) that surrounds the object to be heated is constructed with a heat insulating material, a single heat insulating material in which the side wall and the ceiling portion are formed almost integrally can be used. As a result, a support for supporting the heat insulating material was not particularly necessary. In other words, the single heat insulating material formed integrally could stand up mechanically and stably.
[0008]
However, when the furnace is increased in size, a large closed space is required in the furnace. In order to construct this wide space, it is necessary to construct a wall or a ceiling portion by combining a plurality of heat insulating materials. As a result, it was necessary to support and fix a plurality of heat insulating materials.
[0009]
On the other hand, in a large heating furnace using a conventional gas, electrical resistance or the like as a heat source, the fixing method of the heat insulating material is strong enough to serve as an outer frame via a rod-like or nail-like metal support. A method of fixing a heat insulating member to a metal casing is common.
[0010]
Further, metal absorbs a part of the microwave and generates heat, but has a property of reflecting most of the microwave. This property is properly used as needed. For example, in a general electronic cooker and a heating furnace using microwaves as a heat source, the microwave is reflected by the metal so that the entire cooker and the furnace are surrounded by metal so that the microwave does not leak outside the furnace. To prevent danger.
[0011]
[Problems to be solved by the invention]
In order to perform high-temperature microwave heating, the following is necessary.
[0012]
a) The object to be heated must be covered with a heat insulating material, and a microwave oscillator and a waveguide must be arranged outside the heat insulating material. In other words, by using the heat insulating material, the heat generated from the object to be heated is confined inside the heat insulating material to keep the object to be heated at a high temperature, and the outside of the heat insulating material is kept at a low temperature to be generated from the object to be heated. This is to prevent the microwave oscillator and the waveguide from being damaged by heat. Therefore, it is necessary to provide an object to be heated, a heat insulating material, an oscillator, and a waveguide in this order from the inside.
[0013]
b) In the industrial world, there is a demand for an increase in the size of the furnace. However, as the size of the furnace increases, it is difficult to integrally form a large-sized heat insulating material at the forming stage as in the past. There is a demand for a structure in which a large number of divided or modular heat-insulating materials are self-supported or stably supported and fixed.
[0014]
c) On the other hand, the microwave is oscillated from the oscillator through the waveguide, passes through the heat insulating material, and needs to reach the object to be heated efficiently. Therefore, it is necessary to avoid disposing a member that obstructs at least between the waveguide and the object to be heated. Moreover, it is necessary to avoid disposing a member that loses its original function due to melting or the like. For example, metal plates, supports and the like should not be placed as they are.
[0015]
d) The heat insulating material needs to be a material that does not hinder the heat generation of the object to be heated by the microwave, that is, a material that is excellent in microwave permeability.
[0016]
e) In order to increase safety for the human body, leakage of microwaves to the outside of the furnace must be prevented. That is, a metal casing that covers at least the outside of the heat insulating material and creates a closed space is required.
[0017]
An object of the present invention is to provide a microwave as a heat source, and a high temperature microwave oven which can be heated to a high temperature and large, the support used therewith.
[0018]
[Means for Solving the Problems]
Examples of the solution of the present invention are the high-temperature microwave heating furnace described in the claims and the support used therefor.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is an improvement of a high-temperature microwave heating furnace that uses microwaves as a heating source. In order from the inside, an object to be heated, a heat insulating material, and a metal casing are arranged. The heat insulating material is provided so as to surround the object to be heated. The heat insulating material is formed of a heat insulating member (preferably a plurality of heat insulating members). The support is made of a non-metallic and inorganic material.
[0020]
The support is safely disposed inside the waveguide. The support is excellent in microwave permeability and heat resistance, has strength at high temperatures, and is easy to mold and process. A non-metallic and inorganic material is selected as the material for the support.
[0021]
Preferably, the support and the shelf member for the high-temperature microwave heating furnace have a dielectric loss equal to or smaller than that of the object to be heated. Furthermore, the support is a refractory material comprising at least one selected from materials such as alumina, mullite, steatite, zircon, cordierite, siliceous, quartz, silicon carbide, and silicon nitride. It is preferable to make.
[0022]
As the material for the support for a heat insulating material in the present invention, a non-metallic and inorganic material that is excellent in microwave permeability and heat resistance, has strength at high temperature, and is easy to process is suitable. Furthermore, when considering transmission, reflection, and absorption of microwaves, a material excellent in microwave transmission is, in other words, a property that hardly reflects and absorbs microwaves. One factor that expresses this property is dielectric loss. A material with a large dielectric loss is likely to absorb microwaves, and as a result, the amount of heat generated by the material increases. Therefore, in a microwave heating furnace for high temperature, a material having a dielectric loss larger than that of the object to be heated is more likely to generate heat than the object to be heated, and thus becomes higher in temperature than the object to be heated. It becomes impossible to maintain, and it becomes easy to deform. That is, the maximum operating temperature of the furnace is lowered. In addition, if such a support is near the object to be heated, it is affected by the heat from the support and it becomes difficult to accurately control the temperature of the object to be heated. Furthermore, microwaves are absorbed by the support before reaching the object to be heated, and the heat generation efficiency of the object to be heated is deteriorated. That is, in the microwave oven for high temperature, the support for supporting the insulation, the dielectric loss or the same as the object to be heated, or is preferably smaller than the object to be heated. For example, when the object to be heated is mullite, the support is preferably mullite or alumina. When the object to be heated is alumina, the support is preferably made of alumina.
[0023]
The support may have any cross-sectional shape, cross-sectional width, diameter, etc. However, if the width and diameter are too small, the strength as a support is insufficient, and if it is too large, the amount of microwaves absorbed by the support increases and the object to be heated cannot be efficiently heated. It is preferable to consider the availability of materials, cost, workability, and workability for the support. As the shape of the support, a tube shape is most preferable.
[0024]
For the heat insulating member constituting the side wall, the support is passed from one side of the side surface of the metal casing located on the opposite surface to the other side surface, and the heat insulating material is supported by the support. Further, the support is supported and fixed at a portion in contact with the metal casing. In this case, a long support capable of passing at least the distance between the side surfaces of the casing is suitable as the support. The elongate support body should just support the outer side or surface of a heat insulation member by at least one part. Further, the heat insulating member may be penetrated and supported by the support.
[0025]
Further, a plurality of heat-insulating member may be in the form of a heat insulating material which is integral with through-shaped support. In this case, the support may be short, and for example, a short support having a length that can support and integrate at least adjacent heat insulating members is suitable. The length of the support can be determined according to the size and quantity of the heat insulating members that are desired to be integrated.
[0026]
The structure which supports the edge part of the arch comprised with the several heat insulation member with the upper end of a side wall heat insulating material is suitable for the heat insulating material arrange | positioned in a ceiling part. A plurality of heat insulating members are combined to form an arch structure, and both ends of the arch are supported by the upper end portion of the side wall heat insulating material. In this case, the heat insulating material of the ceiling portion (furnace wall of the ceiling portion) is provided without a support. Can be configured.
[0027]
Moreover, the heat insulating material of a ceiling part may not be made into an arch structure, but the method of penetrating a heat insulating member with a long support body and fixing the long support body with a metal casing may be used.
[0028]
Further, it is preferable that a space is provided between the outside of the side wall heat insulating material and the waveguide, and the support is naturally cooled by natural convection of an air flow.
[0029]
It is preferable that the heat insulating material is assembled by combining a large number of heat insulating members on both the side wall and the ceiling. Various heat insulating members can be employed.
[0030]
【Example】
A slurry in which alumina fibers, inorganic powder, and a binder are dispersed with water is prepared, and the slurry is vacuum-formed using a mold to obtain a board-like heat insulating member 1 having a thickness of 75 mm. These heat insulating members 1 are laminated in the thickness direction of the heat insulating members, and the side wall heat insulating material is configured so that the lamination direction is parallel to the floor. An alumina tube 2 having an outer diameter of 35 mm was disposed as a support in the same direction as the side wall heat insulating material so as to contact the outer surface of the side wall heat insulating material, and the side wall heat insulating material was supported by the alumina tube 2. .
[0031]
The alumina tube 2 was passed from one side of the metal casing 3 to the opposite side surface. The end of the alumina tube 2 was fixed by being inserted into a hole formed in the metal casing 3. The metal casing 3 is arranged so as to surround the heat insulating material 1 on the side wall and the heat insulating material 1 on the ceiling portion on the six surfaces except for the metal pedestal 4.
[0032]
As the heat insulating material 1 for the ceiling portion, a board-shaped heat insulating member 1 is used which is formed into an arch shape after processing, and is laminated in the thickness direction of the heat insulating member 1 so that the direction is parallel to the floor. Thus, the heat insulating material 1 for the ceiling portion was constructed. At this time, both ends of the arched ceiling portion were supported by the upper end of the side wall heat insulating material 1. The closed space (inside the furnace) surrounded by the heat insulating material 1 had a width of 1140 mm, a length of 1140 mm, and an effective height of 375 mm.
[0033]
The floor portion of the furnace has a structure in which the board-like heat insulating member 1 and the alumina refractory 5 are laid on the metal pedestal 4, and the metal pedestal 4 is raised and lowered. A conventional structure can be adopted as this lifting structure. Furthermore, a space of about 200 mm is provided between the side wall heat insulating material 1 and the heat insulating material 1 of the ceiling portion, and the metal casing 3 so that the structure can be cooled by natural convection of an air flow.
[0034]
In the furnace, a 3 × 200 × 200 mm alumina plate-like shelf member 10 and an alumina tube-like shelf member 11 having an outer diameter of 35 mm and a height of 50 mm are used in combination and arranged as a shelf member. did.
[0035]
When the ceramic material was heated as an object to be heated at 1300 ° C. in the illustrated microwave heating furnace, the ceramic material could be heated without causing distortion or cracking. Moreover, the support body was able to safely support and fix the heat insulating material. The shelf board member was able to stably support the object to be heated.
[0036]
【The invention's effect】
According to the present invention, since a support made of a non-metallic and inorganic material is used, the support is excellent in microwave permeability and heat resistance, has strength at high temperature, and is easy to process.
[0037]
In a microwave heating furnace for high temperature, such a support body is arranged on the inner side of the waveguide, and when a plurality of heat insulating members are combined and supported by the support body, the heat insulating material can be safely supported and fixed, It is easy to increase the size of the high-temperature microwave heating furnace.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an example of a high-temperature microwave heating furnace according to the present invention.
[Explanation of symbols]
1 Insulation material (insulation material)
2 Alumina tube 3 Metal casing 4 Metal base 5 Alumina refractory 6 Heated object 7 Microwave oscillator 8 Waveguide 9 High-temperature microwave heating furnace 10 Alumina plate-like shelf member 11 Alumina tube-like shelf member

Claims (7)

マイクロ波が加熱源として用いられ、内側より順に、被加熱物、断熱材、金属製ケーシングが配置され、断熱材は被加熱物を囲うように設けられ、断熱材が、複数本の長尺の支持体で支持され、長尺の支持体が、金属製ケーシングの側面の一方の側から、対向する他方の側面に渡されていて、断熱材を支持しており、各支持体は、非金属かつ無機質材料からなることを特徴とする高温用マイクロ波加熱炉。A microwave is used as a heating source, and an object to be heated, a heat insulating material, and a metal casing are arranged in order from the inside, the heat insulating material is provided so as to surround the object to be heated, and the heat insulating material has a plurality of long lengths. It is supported by a support, and a long support is passed from one side of the side surface of the metal casing to the opposite side surface to support the heat insulating material. A high-temperature microwave heating furnace comprising an inorganic material. 支持体がチューブ状であることを特徴とする請求項1に記載の高温用マイクロ波加熱炉。The high-temperature microwave heating furnace according to claim 1, wherein the support has a tube shape. マイクロ波が加熱源として用いられ、内側より順に、被加熱物、断熱材、金属製ケーシングが配置され、断熱材は被加熱物を囲うように設けられ、支持体を断熱材に貫通した形で、断熱材が支持体により支持されており、長尺の支持体が、金属製ケーシングの側面の一方の側から、対向する他方の側面に渡されていて、断熱材を支持しており、支持体が非金属かつ無機質材料からなることを特徴とする高温用マイクロ波加熱炉。Microwave is used as a heating source, and the object to be heated, the heat insulating material, and the metal casing are arranged in order from the inside, the heat insulating material is provided so as to surround the object to be heated, and the support is penetrated through the heat insulating material. The heat insulating material is supported by the support body, and the long support body is passed from one side of the side surface of the metal casing to the opposite side surface to support the heat insulating material. A microwave furnace for high temperature, characterized in that the body is made of a non-metallic and inorganic material. 複数の断熱部材に支持体を貫通して、一体として断熱材を構成していることを特徴とする請求項に記載の高温用マイクロ波加熱炉。The microwave heating furnace for high temperature according to claim 3 , wherein a heat insulating material is integrally formed by penetrating a support body through a plurality of heat insulating members. マイクロ波が加熱源として用いられ、内側より順に、被加熱物、断熱材、金属製ケーシングが配置され、断熱材は被加熱物を囲うように設けられ、支持体を断熱材に貫通した形で、断熱材が支持体により支持されており、支持体が非金属かつ無機質材料からなり、複数の断熱部材に支持体を貫通して、一体として断熱材を構成していることを特徴とする高温用マイクロ波加熱炉。Microwave is used as a heating source, and the object to be heated, the heat insulating material, and the metal casing are arranged in order from the inside, the heat insulating material is provided so as to surround the object to be heated, and the support is penetrated through the heat insulating material. The high temperature is characterized in that the heat insulating material is supported by the support, the support is made of a non-metallic and inorganic material, penetrates the support through a plurality of heat insulating members, and constitutes the heat insulating material integrally. Microwave heating furnace. 請求項1〜5のいずれか1項に記載の高温用マイクロ波加熱炉に使用される支持体であって、支持体の誘電損失が被加熱物と同じか、または被加熱物よりも小さいことを特徴とする高温用マイクロ波加熱炉用支持体。It is a support body used for the microwave heating furnace for high temperature of any one of Claims 1-5, Comprising: The dielectric loss of a support body is the same as a to-be-heated object, or is smaller than a to-be-heated object. A support for a microwave heating furnace for high temperature. 支持体が、アルミナ質、ムライト質、ステアタイト質、ジルコン質、コーディエライト質、シリカ質、石英、炭化ケイ素、窒化ケイ素の1種以上からなる耐火物で作られていることを特徴とする請求項6に記載の高温用マイクロ波加熱炉用支持体。The support is made of a refractory composed of one or more of alumina, mullite, steatite, zircon, cordierite, siliceous, quartz, silicon carbide, and silicon nitride. The high temperature microwave heating furnace support according to claim 6.
JP2002033992A 2002-02-12 2002-02-12 Microwave furnace for high temperature and support used for it Expired - Fee Related JP3631211B2 (en)

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