JPH07190360A - Self-control type glow plug - Google Patents
Self-control type glow plugInfo
- Publication number
- JPH07190360A JPH07190360A JP34792793A JP34792793A JPH07190360A JP H07190360 A JPH07190360 A JP H07190360A JP 34792793 A JP34792793 A JP 34792793A JP 34792793 A JP34792793 A JP 34792793A JP H07190360 A JPH07190360 A JP H07190360A
- Authority
- JP
- Japan
- Prior art keywords
- heating
- heating wire
- heat generating
- self
- glow plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 74
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001080 W alloy Inorganic materials 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 239000010937 tungsten Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 42
- 239000000945 filler Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 238000013021 overheating Methods 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 6
- 238000010304 firing Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は液体燃料を用いるデイー
ゼル機関、燃焼器などにおける燃料の着火を助けるグロ
ープラグ、特にセラミツク材料を用いた自己制御型グロ
ープラグに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glow plug for assisting ignition of fuel in a diesel engine using a liquid fuel, a combustor, etc., and more particularly to a self-regulating glow plug using a ceramic material.
【０００２】[0002]
【従来の技術】金属発熱線の発熱部への通電電力を制御
し、発熱部の過熱を防止する自己制御型のグロープラグ
として、金属発熱線よりも正の抵抗温度係数が大きな材
料からなる抵抗線を、金属発熱線と直列に接続したう
え、セラミツク材料からなる発熱体の内部へ埋め込ん
だ、いわゆるシース型の自己制御型グロープラグが既に
提案されている。2. Description of the Related Art A self-controlled glow plug for controlling electric power supplied to a heating portion of a metal heating wire to prevent overheating of the heating portion is used as a resistor made of a material having a positive temperature coefficient of resistance higher than that of the metal heating wire. A so-called sheath type self-regulating glow plug in which a wire is connected in series with a metal heating wire and embedded inside a heating element made of a ceramic material has already been proposed.
【０００３】上述の自己制御型グロープラグでは、金属
発熱線に抵抗温度係数が小さな材料を使用し、通電電力
を制御する抵抗線に抵抗温度係数が大きな材料を使用
し、モノリシツクなセラミツク材料の内部へ埋め込んだ
構造とするために、ホツトプレス法を採用している。し
かし、ホツトプレス法では金属発熱線が二次元形状に制
約されるので、発熱体の表面温度にバラツキが生じるだ
けでなく、速熱性にも問題がある。In the above-mentioned self-regulating glow plug, a material having a small temperature coefficient of resistance is used for the metal heating wire and a material having a large temperature coefficient of resistance is used for the resistance wire for controlling the electric power to be supplied, and the inside of the monolithic ceramic material is used. The hot press method is used to make the structure embedded in. However, since the metal heating wire is restricted to a two-dimensional shape in the hot press method, not only the surface temperature of the heating element varies but also there is a problem in rapid heating.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は上述の
問題に鑑み、セラミツク材料を用いた発熱体への供給電
力を金属発熱線の温度に対応して自己制御し、発熱体の
過熱（過大な温度上昇）を防止するとともに、発熱体の
均一加熱性と速熱性を高めた、自己制御型グロープラグ
を提供することにある。In view of the above problems, the object of the present invention is to self-control the electric power supplied to a heating element using a ceramic material in accordance with the temperature of a metal heating wire, and to overheat the heating element ( It is intended to provide a self-regulating glow plug which prevents an excessive temperature rise) and enhances uniform heating property and rapid heating property of a heating element.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の構成は緻密質の窒化硅素からなる鞘状の外
殻の内部に、タングステンまたはタングステン合金から
なるコイル状の金属発熱線をセラミツク系の充填材とと
もに封入し、金属発熱線の先端のコイル状の発熱部の周
囲を覆う充填材に、金属発熱線の他の部分の周囲を覆う
充填材の熱伝導率よりも小さいものを用いたものであ
る。In order to achieve the above object, the structure of the present invention comprises a coil-shaped metal heating wire made of tungsten or a tungsten alloy inside a sheath-shaped outer shell made of dense silicon nitride. With a ceramic-based filler, and a filler that covers the periphery of the coil-shaped heat-generating part at the end of the metal heating wire and that has a smaller thermal conductivity than the filler that covers the other portions of the metal heating wire. Is used.
【０００６】[0006]
【作用】本発明は発熱体を、熱伝導率の大きなセラミツ
クからなる外殻の内部に金属発熱線を、三次元形状、具
体的にはコイル状にした発熱部が外殻の内周面に接する
ように収容し、外殻の内空部の金属発熱線の発熱部を覆
う先端ないし底部に、熱伝導率の小さいセラミツク材料
を充填し、これにより発熱部の内側を熱遮蔽した二重構
造にする。外殻の内空部の金属発熱線の発熱部以外の部
分には、先端発熱部を覆うセラミツクよりも熱伝導率が
大きいセラミツク材料を充填・焼結する。According to the present invention, the heating element is a metal heating wire inside the outer shell made of ceramic having a large thermal conductivity, and a three-dimensional, specifically coiled heating portion is provided on the inner peripheral surface of the outer shell. Double structure in which the inside of the heat generating part is thermally shielded by filling the tip or bottom part of the metal heating wire in the inner space of the outer shell that covers the heat generating part with the ceramic material with low thermal conductivity. To A ceramic material having a thermal conductivity higher than that of the ceramic covering the tip heating portion is filled and sintered in a portion other than the heating portion of the metal heating wire in the inner space of the outer shell.
【０００７】発熱体におけるコイル状の発熱部は内側
を、熱伝導率が小さい内殻で熱遮蔽され、コイル状の発
熱部が接する外殻は外表面へ熱伝達を促すようになつて
いるので、外殻の外表面の温度が迅速かつ均一に上昇す
る。発熱体の温度は、温度上昇に伴い抵抗値が増加する
特性を有する金属発熱線により自己制御される。The inside of the coil-shaped heat generating portion of the heating element is shielded by the inner shell having a small thermal conductivity, and the outer shell in contact with the coil-shaped heating portion promotes heat transfer to the outer surface. , The temperature of the outer surface of the outer shell rises quickly and uniformly. The temperature of the heating element is self-controlled by a metal heating wire having a characteristic that the resistance value increases as the temperature rises.
【０００８】[0008]
【実施例】図１は本発明に係る自己制御型グロープラグ
の正面断面図である。本発明による自己制御型グロープ
ラグは、下端ないし先端が閉鎖された鞘状の外殻３１に
より発熱体３０を構成される。外殻３１はセラミツクと
して緻密型の窒化硅素（ＳｉＮ）から成形されかつ焼結
され、金属保護管３に嵌合され、かつ嵌合部３ａを例え
ばメタライズ法により一体に結合される。図示してない
が、金属保護管３は燃焼室壁に螺合される金属本体に嵌
合され、かつろう付けなどにより結合される。1 is a front sectional view of a self-regulating glow plug according to the present invention. In the self-regulating glow plug according to the present invention, the heating element 30 is composed of a sheath-shaped outer shell 31 whose lower end or tip is closed. The outer shell 31 is molded from dense silicon nitride (SiN) as ceramics, is sintered, is fitted to the metal protective tube 3, and the fitting portion 3a is integrally joined by, for example, a metallizing method. Although not shown, the metal protection tube 3 is fitted to a metal body screwed to the wall of the combustion chamber and is joined by brazing or the like.
【０００９】本発明による発熱体３０は予め焼結された
外殻３１の内部に、タングステン、タングステン合金な
どからなる金属発熱線１７を挿入される。金属発熱線１
７の一端側のリード部１８は外殻３１の軸心に配され、
途中の金属保護管３の内部に位置する部分を、螺旋状な
いしコイル状に巻いて電力制御部２０を形成される。金
属発熱線１７はリード部１８ａを経て外殻３１の先端部
でコイル状に巻いて発熱部２０ａを形成される。金属発
熱線１７の他端側は発熱部２０ａから上方へ折り返して
リード部１９を形成される。In the heating element 30 according to the present invention, a metal heating wire 17 made of tungsten, a tungsten alloy or the like is inserted inside a pre-sintered outer shell 31. Metal heating wire 1
The lead portion 18 on the one end side of 7 is arranged at the axial center of the outer shell 31,
The power control unit 20 is formed by winding a portion located inside the metal protection tube 3 on the way in a spiral shape or a coil shape. The metal heating wire 17 is wound in a coil shape at the tip of the outer shell 31 via the lead portion 18a to form a heating portion 20a. The other end of the metal heating wire 17 is bent upward from the heating portion 20a to form a lead portion 19.
【００１０】上述のように、金属発熱線１７はコイル状
の発熱部２０ａが外殻３１の内周面に直接接触するよう
に配設し、外殻３１の内空部の下端部で発熱部２０ａを
内殻２７ａにより覆われ、発熱部２０ａの上方部と電力
制御部２０を内殻２７により覆われる。すなわち、内殻
２７ａは外殻３１の下端部に熱伝導率が小さいアルミナ
・フアイバを疎に充填して構成され、内殻２７は発熱部
２０ａの上方部に、加圧しなくても焼成可能であり、か
つ焼成により若干膨張する窒化硅素・窒化チタニウム
（ＳｉＮ−ＴｉＮ）系のセラミツク粉末を充填して構成
される。こうして、外殻３１の内部に金属発熱線１７と
２種のセラミツク充填材を充填したものを、所定の温度
（約１４００℃）で焼成すれば、セラミツク充填材が固
化し、内殻２７が外殻３１と一体的に結合される。As described above, the metal heating wire 17 is arranged so that the coil-shaped heating portion 20a is in direct contact with the inner peripheral surface of the outer shell 31, and the heating portion is formed at the lower end of the inner hollow portion of the outer shell 31. 20 a is covered with an inner shell 27 a, and the upper portion of the heat generating portion 20 a and the power control unit 20 are covered with the inner shell 27. That is, the inner shell 27a is formed by sparsely filling the lower end of the outer shell 31 with alumina fiber having a small thermal conductivity, and the inner shell 27 can be fired above the heat generating portion 20a without applying pressure. It is formed by filling a silicon nitride / titanium nitride (SiN—TiN) -based ceramic powder that is present and slightly expands by firing. In this way, when the metal shell 17 and the two ceramic fillers filled in the outer shell 31 are fired at a predetermined temperature (about 1400 ° C.), the ceramic filler is solidified and the inner shell 27 is removed. It is integrally connected to the shell 31.
【００１１】金属発熱線１７のリード部１８は環状の金
属端子２３へ結合し、リード部１９は金属端子２３の中
心の絶縁体２４を経て、絶縁体からなる環状体２１の中
心に結合した金属端子２２へ結合される。金属端子２３
は金属保護管３に接続され、金属端子２２は公知の電極
棒８に接続される。The lead portion 18 of the metal heating wire 17 is joined to the annular metal terminal 23, and the lead portion 19 is joined to the center of the annular body 21 made of an insulator through the insulator 24 at the center of the metal terminal 23. It is coupled to the terminal 22. Metal terminal 23
Is connected to the metal protection tube 3, and the metal terminal 22 is connected to the well-known electrode rod 8.
【００１２】本発明は上述のように、金属発熱線１７が
発熱部２０ａで三次元の形状すなわちコイル状に形成さ
れ、かつ外殻３１の内周面に直接接触し、熱伝導率の小
さい内殻２７ａが外殻３１の内部に配設された構造にな
つているので、通電後は発熱部２０ａの熱は、内殻２７
ａへは伝わりにくく、外殻３１へ伝わるので、発熱体３
０の外表面が迅速かつ周方向に均一に加熱され、燃焼室
の燃料を気化し着火させる。換言すれば、発熱体３０に
おける発熱部２０ａは内側を、熱伝導率が小さい内殻２
７ａで熱遮蔽され、外殻３１の外表面へ熱伝達を促すよ
うになつているので、外殻３１の外表面の温度が迅速に
上昇する。According to the present invention, as described above, the metal heating wire 17 is formed in the heating portion 20a in a three-dimensional shape, that is, in the shape of a coil, and is in direct contact with the inner peripheral surface of the outer shell 31 to have a small thermal conductivity. Since the shell 27a has a structure arranged inside the outer shell 31, the heat of the heat generating portion 20a is not changed after the power is turned on.
It is difficult to reach a and is transmitted to the outer shell 31.
The outer surface of No. 0 is rapidly and uniformly heated in the circumferential direction to vaporize and ignite the fuel in the combustion chamber. In other words, the heat generating portion 20a of the heat generating element 30 is located on the inner side, and
Since the heat is shielded by 7a and the heat transfer is promoted to the outer surface of the outer shell 31, the temperature of the outer surface of the outer shell 31 rapidly rises.
【００１３】図２に実線で示すように、本発明による発
熱体３０は、破線で示す従来のものに比べて、外殻３１
の外表面の温度が迅速に上昇する。As shown by the solid line in FIG. 2, the heating element 30 according to the present invention has an outer shell 31 as compared with the conventional one shown by the broken line.
The temperature of the outer surface rises quickly.
【００１４】図３に示すように、実験結果によれば、内
殻２７ａの熱伝導率が大きいと、発熱部２０ａの熱が内
殻２７ａで吸収され、外殻３１へ効果的に伝達されな
い。内殻２７ａの熱伝導率が小さいほど、外殻３１の外
表面の速熱効果は優れたものになる。As shown in FIG. 3, according to the experimental results, when the thermal conductivity of the inner shell 27a is large, the heat of the heat generating portion 20a is absorbed by the inner shell 27a and is not effectively transferred to the outer shell 31. The smaller the thermal conductivity of the inner shell 27a, the better the effect of rapid heating of the outer surface of the outer shell 31.
【００１５】金属発熱線１７の発熱部２０ａが所定の温
度（９００〜１０００℃）に達すると、電力制御部２０
の抵抗値が大きくなり、発熱部２０ａへの通電電力が自
ら減じ、発熱部２０ａの過大な温度上昇が抑えられ、金
属発熱線１７の焼損や発熱体３０の熱破壊が防止され
る。When the heat generating portion 20a of the metal heat generating wire 17 reaches a predetermined temperature (900 to 1000 ° C.), the power control portion 20.
Of the heating element 20a is reduced, the electric power supplied to the heating portion 20a is reduced, an excessive temperature rise of the heating portion 20a is suppressed, and burnout of the metal heating wire 17 and thermal destruction of the heating element 30 are prevented.
【００１６】なお、図４に示すように、本発明は金属発
熱線１７に電力制御部２０を特別に設けなくても、内殻
２７ａの熱伝導率が内殻２７のそれよりも小さいことか
ら、発熱部自体の温度上昇による抵抗値の増加に伴い、
通電電力が制御され、発熱体３０の過熱を防止できる。As shown in FIG. 4, according to the present invention, the heat conductivity of the inner shell 27a is smaller than that of the inner shell 27, even if the power control unit 20 is not specially provided on the metal heating wire 17. , As the resistance value increases due to the temperature rise of the heat generating part itself,
The supplied electric power is controlled, and overheating of the heating element 30 can be prevented.
【００１７】[0017]
【発明の効果】本発明は上述のように、発熱体における
コイル状の発熱部は内側を、熱伝導率が小さい内殻で熱
遮蔽され、コイル状の発熱部が接する外殻は、外表面へ
熱伝達を促すようになつているので、外殻の外表面の温
度が迅速かつ均一に上昇する。As described above, according to the present invention, the inside of the coil-shaped heating portion of the heating element is thermally shielded by the inner shell having a small thermal conductivity, and the outer shell of the coil-shaped heating portion is in contact with the outer surface. The temperature of the outer surface of the outer shell rises quickly and uniformly because it promotes heat transfer to the outer shell.
【００１８】発熱体の温度は、温度上昇に伴い抵抗値が
増加する特性を有する金属発熱線により自己制御され
る。The temperature of the heating element is self-controlled by the metal heating wire having the characteristic that the resistance value increases as the temperature rises.
【００１９】金属発熱線の発熱部を覆う内殻にアルミナ
・フアイバを用いたことにより、内殻の熱伝導率を外殻
のそれよりも小さくできる。By using alumina fiber for the inner shell that covers the heat generating portion of the metal heating wire, the thermal conductivity of the inner shell can be made smaller than that of the outer shell.
【００２０】電力制御部を覆う内殻に硅素、チタニウ
ム、酸素、窒素の内の少くも１つの元素を含むセラミツ
ク、例えば窒化硅素・窒化チタニウム系セラミツクを用
いることにより、焼成時の熱膨張が殆どないので、焼成
中に外殻が熱破損する恐れはない。By using a ceramic containing at least one element of silicon, titanium, oxygen, and nitrogen, for example, a silicon nitride / titanium nitride-based ceramic in the inner shell covering the power control unit, thermal expansion during firing is almost eliminated. Since it does not exist, there is no risk of heat damage to the outer shell during firing.
【図１】本発明に係る自己制御型グロープラグの正面断
面図である。FIG. 1 is a front sectional view of a self-regulating glow plug according to the present invention.
【図２】本発明による自己制御型グロープラグの速熱性
を、従来のものと比較して表す線図である。FIG. 2 is a diagram showing a rapid heating property of a self-regulating glow plug according to the present invention, as compared with a conventional one.
【図３】発熱体の内殻の熱伝導率と速熱性との関係を表
す線図である。FIG. 3 is a diagram showing the relationship between the thermal conductivity of the inner shell of the heating element and the rapid heating property.
【図４】本発明の変更実施例に係る自己制御型グロープ
ラグの正面断面図である。FIG. 4 is a front sectional view of a self-regulating glow plug according to a modified embodiment of the present invention.
３：金属保護管 １７：金属発熱線 ２０：弾力制御部
２０ａ：発熱部 ２７，２７ａ：内殻 ３０：発熱部
体 ３１：外殻3: Metal protective tube 17: Metal heating wire 20: Elasticity control part 20a: Heating part 27, 27a: Inner shell 30: Heating part body 31: Outer shell
Claims (3)
部に、タングステンまたはタングステン合金からなるコ
イル状の金属発熱線をセラミツク系の充填材とともに封
入し、金属発熱線の先端のコイル状の発熱部の周囲を覆
う充填材に、金属発熱線の他の部分の周囲を覆う充填材
の熱伝導率よりも小さいものを用いたことを特徴とす
る、自己制御型グロープラグ。1. A coil-shaped metal heating wire made of tungsten or a tungsten alloy is enclosed with a ceramic-based filler in a sheath-like outer shell made of dense silicon nitride, and a coil at the tip of the metal heating wire is enclosed. A self-regulating glow plug, characterized in that a filler having a lower thermal conductivity than the filler covering the other portions of the metal heating wire is used as the filler covering the periphery of the heat generating portion.
ル状の発熱部以外の周囲を覆う充填材は、少くとも硅
素、チタニウム、酸素、窒素の内の１つの元素を含む、
請求項１に記載の自己制御型グロープラグ。2. The filler covering the periphery of the filler other than the coil-shaped heat generating portion at the end of the metal heating wire contains at least one element selected from the group consisting of silicon, titanium, oxygen and nitrogen.
The self-regulating glow plug according to claim 1.
ル状の発熱部の周囲を覆う充填材は、熱伝導率が３Ｗ／
ｍ・Ｋ以下である、請求項１，２に記載の自己制御型グ
ロープラグ。3. The filler which covers the periphery of the coil-shaped heat generating portion at the tip of the metal heating wire in the filler has a thermal conductivity of 3 W /.
The self-regulating glow plug according to claim 1, wherein the glow plug has a m · K or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34792793A JPH07190360A (en) | 1993-12-25 | 1993-12-25 | Self-control type glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34792793A JPH07190360A (en) | 1993-12-25 | 1993-12-25 | Self-control type glow plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07190360A true JPH07190360A (en) | 1995-07-28 |
Family
ID=18393558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34792793A Pending JPH07190360A (en) | 1993-12-25 | 1993-12-25 | Self-control type glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07190360A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018129211A (en) * | 2017-02-09 | 2018-08-16 | 日本特殊陶業株式会社 | Ceramic heater and glow plug |
| WO2020054554A1 (en) * | 2018-09-11 | 2020-03-19 | 京セラ株式会社 | Heater and tobacco heating tool equipped with same |
-
1993
- 1993-12-25 JP JP34792793A patent/JPH07190360A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018129211A (en) * | 2017-02-09 | 2018-08-16 | 日本特殊陶業株式会社 | Ceramic heater and glow plug |
| WO2020054554A1 (en) * | 2018-09-11 | 2020-03-19 | 京セラ株式会社 | Heater and tobacco heating tool equipped with same |
| KR20210008526A (en) * | 2018-09-11 | 2021-01-22 | 교세라 가부시키가이샤 | Heater and heating device for cigarette equipped with it |
| CN112335334A (en) * | 2018-09-11 | 2021-02-05 | 京瓷株式会社 | Heater and cigarette heating device provided with the same |
| JPWO2020054554A1 (en) * | 2018-09-11 | 2021-08-30 | 京セラ株式会社 | A heater and a tobacco heater equipped with it |
| CN112335334B (en) * | 2018-09-11 | 2022-12-09 | 京瓷株式会社 | Heater and heating appliance equipped with the heater |
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