JPH1055877A

JPH1055877A - Electric heater

Info

Publication number: JPH1055877A
Application number: JP24246496A
Authority: JP
Inventors: Atsushi Ehata; 篤士江幡
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-10
Filing date: 1996-08-10
Publication date: 1998-02-24

Abstract

PROBLEM TO BE SOLVED: To enable the use of carbon fiber as an electric heater by using a chemically stabilized ceramic so as to separate and protect the carbon fiber from the oxidizing environment. SOLUTION: A carbon fiber as a high-temperature electric heater is isolated from an oxidizing environment by a ceramic having the strong oxidization resistance, and mechanical strength of the ceramic, which is generally weak, is reinforced by the carbon fiber. The carbon fiber and the ceramic raw material are mixed and burned for molding, or a cloth and a bundle of carbon fiber is put in the ceramic raw material and burned for molding. Molding and burning are designed in response to the purpose of a heater. With this structure, a radiation type electric heater having the excellent mechanical strength, which can be easily controlled from a low temperature to a high temperature in the liquid phase or gaseous phase oxidizing environment, can be obtained.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】（発明の属する技術分野）セラミックを高
温においても強度を維持する炭素繊維により補強すると
ともに酸化環境下では高温に耐えられない炭素繊維をセ
ラミックにより酸化環境から保護することで実現される
電気ヒーター。(Technical field to which the invention belongs) Electricity realized by reinforcing ceramics with carbon fibers that maintain strength even at high temperatures and protecting carbon fibers that cannot withstand high temperatures in an oxidizing environment from the oxidizing environment with ceramics. heater.

【０００２】（従来の技術）従来のセラミックヒーター
は金属電熱線もしくは火によりセラミックを熱すること
で赤外線／遠赤外線を輻射させていた。また、炭素は大
気中等の酸化環境下では電気ヒーターとして利用されて
いない。(Prior Art) A conventional ceramic heater emits infrared rays / far infrared rays by heating ceramic with a metal heating wire or a fire. Further, carbon is not used as an electric heater in an oxidizing environment such as in the air.

【０００３】（発明が解決しようとする課題）従来のセ
ラミックヒーターでは金属発熱体の高温における機械的
特性上あるいは熱エネルギーの伝達の限界により温度を
十分に上げることができなかった。また、通常のセラミ
ック自体は機械的に脆く使用環境に制限があった。一
方、炭素繊維はそれ自体が良好な電気発熱体でありしか
も高温においてもその機械強度は極めて高く高温時の電
気発熱体としての特性を備えているが、大気中あるいは
水中等の酸化環境下においては酸化消耗し電気ヒーター
としては利用されていなかった。(Problems to be Solved by the Invention) In the conventional ceramic heater, the temperature cannot be sufficiently increased due to the mechanical characteristics of the metal heating element at a high temperature or the limit of heat energy transmission. In addition, ordinary ceramics themselves are mechanically brittle and have a limited use environment. On the other hand, carbon fiber itself is a good electric heating element, and its mechanical strength is extremely high even at high temperatures, and it has the characteristics of an electric heating element at high temperatures. Was consumed by oxidation and was not used as an electric heater.

【０００４】（課題を解決するための手段）高温電気発
熱体である炭素繊維を耐酸化性の強いセラミックにより
酸化環境から隔離するとともに、一般的に脆い性質を有
するセラミックの機械強度を炭素繊維により補強する。(Means for Solving the Problems) Carbon fiber, which is a high-temperature electric heating element, is isolated from an oxidizing environment by a ceramic having a high oxidation resistance, and the mechanical strength of a generally brittle ceramic is enhanced by the carbon fiber. Reinforce.

【０００５】（発明の実施の形態）炭素繊維とセラミッ
ク原料を混合して成形焼成するかあるいはセラミック原
料の中に炭素繊維の布、束等を置いて成型焼成する。成
形と焼成は発熱体の目的に応じて設計する。(Embodiment of the Invention) Carbon fiber and a ceramic raw material are mixed and molded or fired, or a carbon fiber cloth, a bundle or the like is placed in the ceramic raw material and molded and fired. The molding and firing are designed according to the purpose of the heating element.

【０００６】（実施例）１．輻射熱を利用した調理器具として２．高温域の研究用輻射熱源として３．高温域までの温度管理を必要とする製品製造設備と
して４．電磁波吸収型の熱源として５．その他高温域まで輻射エネルギーを使用する設備の
熱源／光源として(Embodiment) 1. Cooking utensils using radiant heat 2. As a radiant heat source for research at high temperatures. 3. As a product manufacturing facility that requires temperature control up to the high temperature range. 4. As an electromagnetic wave absorption type heat source Other heat sources / light sources for equipment that uses radiant energy up to high temperatures

【０００７】（発明の効果）液相あるいは気相の酸化環
境下において低温から高温まで容易に制御でき、かつ機
械強度に優れた輻射型電気ヒーターを提供する。炭素繊
維の量と形状を調整することによりヒーターの特性およ
び形状は自由に設計できる。(Effect of the Invention) A radiant electric heater which can be easily controlled from a low temperature to a high temperature in a liquid or gas phase oxidizing environment and has excellent mechanical strength is provided. By adjusting the amount and shape of the carbon fiber, the characteristics and shape of the heater can be freely designed.

【図面の簡単な説明】[Brief description of the drawings]

（図１）は本発明において炭素繊維をセラミック原料に
混入し成形焼成した場合のヒーター例の斜視図である。
（図２）は炭素繊維の平板をセラミックで保護したヒー
ター例の斜視図である。（図３）は（図２）で示したヒ
ーター例の要部断面図である。FIG. 1 is a perspective view of an example of a heater in a case where carbon fibers are mixed into a ceramic raw material and molded and fired in the present invention.
FIG. 2 is a perspective view of an example of a heater in which a flat plate of carbon fiber is protected by ceramic. FIG. 3 is a cross-sectional view of a main part of the example of the heater shown in FIG.

【符号の説明】[Explanation of symbols]

（図１）１ヒーター発熱部２電極部３電極端子４電線（図２）および（図３）１平面ヒーター発熱部（外面保護セラミック〕２電極部３電極端子４電線５保護セラミック (Fig. 1) 1 Heater heating section 2 Electrode section 3 Electrode terminal 4 Electric wire (Fig. 2) and (Fig. 3) 1 Flat heater heating section (external protective ceramic) 2 Electrode section 3 Electrode terminal 4 Electric wire 5 Protective ceramic

Claims

【特許請求の範囲】[Claims]

【請求項１】赤外線遠赤外線輻射体であるセラミッ
クを炭素繊維により補強するとともに炭素繊維そのもの
を電気により発熱させることを原理とした電気ヒータ
ー。1. An electric heater based on the principle that ceramics, which are infrared far-infrared radiators, are reinforced with carbon fibers and the carbon fibers themselves are heated by electricity.