JPH0311072B2 - - Google Patents
Info
- Publication number
- JPH0311072B2 JPH0311072B2 JP58107044A JP10704483A JPH0311072B2 JP H0311072 B2 JPH0311072 B2 JP H0311072B2 JP 58107044 A JP58107044 A JP 58107044A JP 10704483 A JP10704483 A JP 10704483A JP H0311072 B2 JPH0311072 B2 JP H0311072B2
- Authority
- JP
- Japan
- Prior art keywords
- far
- metal pipe
- infrared
- heater
- heating wire
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 23
- 230000005855 radiation Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 9
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000005422 blasting Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 229910000423 chromium oxide Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910001293 incoloy Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
産業上の利用分野
本発明は、暖房器、調理器、乾燥機器などの熱
源として、使用されるもので、遠赤外線を効率的
に放射する遠赤外線ヒータの製造方法に関する。
従来例の構成とその問題点
従来、遠赤外線を放射する遠赤外線ヒータとし
ては、
(i) 赤外線ランプ
(ii) セラミツクスの中に発熱線を埋め込み一体焼
成したもの
(iii) シーズヒータの表面に遠赤外線放射層を形成
したもの
などがあるが、放射特性、機械的強度、寿命、な
どの観点からシーズヒータタイプが多く製造され
ている。
一般に、シーズヒータは第１図に示すように両
端に端子棒１を備えたコイル状の電熱線２を金属
パイプ３に挿入し、この金属パイプ３に電融マグ
ネシア等の電気絶縁粉末４を充填してなり、必要
に応じて、金属パイプ３の両端をガラス５や耐熱
性樹脂６で封口したものである。
一方、遠赤外線ヒータとしては第２図に示すよ
うにシーズヒータの表面に遠赤外線放射層７を形
成したものがある。
遠赤外線放射層７としては、ジルコンを60％以
上とし、これにFe2O3、CoO、NiO、Cr2O3、
MnO2などの酸化物および粘土を加えたものから
なる混合物を焼成したもの、あるいは、元素周期
律表第２族の元素と第３族の元素との複合化合
物、および珪酸ジルコニウム群から選ばれた複合
酸化物を30重量％以上含有したものなどが知られ
ている。
しかし、ジルコンを主体としたものは、一種の
磁器であるため機械的に弱く、500℃以上の冷熱
サイクルにおいてクラツクが生じてしまうもので
あつた。
一方、遠赤外線放射物質を金属パイプ３の表面
に、被膜する方法として、主に溶射法が用いられ
るため、製造コストが非常に高くつくものであつ
た。
このように、従来の遠赤外線ヒータは、
(i) 500℃以上の高温流域で使用できない、
(ii) ランニングコストを含め製造コストが高い、
などいろいろな欠点がある。
このため、NCF800（JISG4920）の金属パイプ
をブラスト処理し、パイプ表面を粗面化させたの
ち、アルゴン、ヘリウム等の不活性雰囲気中で熱
処理し、こののちさらに、高温の酸化雰囲気中で
熱処理し、酸化クロムを主成分とする酸化被膜を
形成させる方法などが、提案されているが、この
方法においても、二度の熱処理が必要であるとと
もに、形成された被膜は、多孔質であるため使用
温度によつては冷熱サイクルにより剥離するもの
であつた。
また、酸化クロムを主成分とする遠赤外線放射
層は、放射率はあまり高くなく、さらに、食塩な
どの腐食性の強い物質により６価クロムが生成さ
れるなど、あまり好ましいものではなかつた。
発明の目的
本発明は、かかる従来の欠点を解決し、遠赤外
線領域の放射率が大きく、500℃以上の高温領域
で使用できる製造コストの安い遠赤外線ヒータの
製造方法を提供することを目的とするものであ
る。
発明の構成
上記目的を達成するため本発明は金属パイプ内
に配した電熱線と、この電熱線と金属パイプの空
間に充填した電気絶縁粉末とを備え、前記金属パ
イプはブラスト処理され、800℃以上の還元性雰
囲気中で熱処理し、金属パイプ中に含まれるニツ
ケルをその表面で酸化させて酸化ニツケルを主成
分とする遠赤外線放射層を形成したもので、金属
パイプの酸化現象を利用して遠赤外線放射率が大
きく緻密で密着性の良い遠赤外線放射層を形成す
ることができるものである。
800℃以上の還元性雰囲気で熱処理するのは800
℃以下では、酸化ニツケルを主成分とする酸化ス
ケールの形成が不充分となり、また還元性雰囲気
で処理するのは、形成される酸化スケールの密着
性が中性または、酸化性雰囲気では、低下するた
めである。
実施例の説明
以下、本発明の実施例について第３図および第
４図を参照して説明する。なお従来のものと同一
の部材には同一の符号を付しその説明は省略す
る。
１１は金属パイプで、長さ413mm、外径８mm、
肉厚0.4mmのSUS304、SUS321のステンレス鋼お
よびNCF800（商品名インコロイ800）の鉄基合金
をそれぞれ用いた。
電熱線１２として、線径0.29mmのニクロム線第
一種を用い、これを巻径２mmのコイル状とし両端
に端子棒１３を接続した。
それぞれの金属パイプ１１に上記端子棒１３を
両端に接続した電熱線１２を挿入し、金属パイプ
１１に電気絶縁粉末１４として、電融マグネシア
粉末を充填し、圧延減径、焼鈍の各工程を経て、
金属パイプ１１を長さ500mm、外径6.6mmとした。
こののち、それぞれの金属パイプ１１の表面を
コランダム（＃60）の研削剤でブラスト処理し、
次表に示す各温度で30分間熱処理し、金属パイプ
１１の表面に遠赤外線放射層１５を形成させるこ
とにより、試料番号４〜28の遠赤外線ヒータをそ
れぞれ完成した。
一方、比較のために、ブラスト処理および熱処
理のない従来の圧延減径、焼鈍のみの工程で製造
したシーズヒータも同時に完成し、試料番号１、
２、３とした。
完成した試料番号１〜28のそれぞれのヒータの
全放射率を測定し表に示した。
INDUSTRIAL APPLICATION FIELD The present invention relates to a method for manufacturing a far-infrared heater that is used as a heat source for space heaters, cookers, drying equipment, etc., and that efficiently radiates far-infrared rays. Conventional configurations and their problems Conventional far-infrared heaters that emit far-infrared rays include (i) infrared lamps, (ii) ceramics with heating wire embedded in them and integrally fired, and (iii) far-infrared heaters that radiate far-infrared rays on the surface of the sheathed heater. There are some types that have an infrared radiation layer, but many types of sheathed heaters are manufactured from the viewpoints of radiation characteristics, mechanical strength, lifespan, etc. Generally, as shown in Fig. 1, a sheathed heater has a coiled heating wire 2 with terminal rods 1 at both ends inserted into a metal pipe 3, and this metal pipe 3 is filled with an electrically insulating powder 4 such as fused magnesia. Both ends of the metal pipe 3 are sealed with glass 5 or heat-resistant resin 6, if necessary. On the other hand, as a far-infrared heater, there is one in which a far-infrared radiation layer 7 is formed on the surface of a sheathed heater, as shown in FIG. The far-infrared emitting layer 7 is made of zircon at 60% or more, and contains Fe 2 O 3 , CoO, NiO, Cr 2 O 3 ,
Fired mixtures of oxides such as MnO 2 and clay added, or composite compounds of elements from group 2 and group 3 of the periodic table, and zirconium silicate group. Products containing 30% by weight or more of composite oxide are known. However, since zircon-based materials are a type of porcelain, they are mechanically weak and cracks occur during cooling and heating cycles of 500°C or higher. On the other hand, since a thermal spraying method is mainly used to coat the surface of the metal pipe 3 with the far-infrared emitting material, the manufacturing cost is extremely high. As described above, conventional far-infrared heaters have various drawbacks, such as (i) they cannot be used in high-temperature regions of 500℃ or higher, and (ii) manufacturing costs, including running costs, are high. For this reason, NCF800 (JISG4920) metal pipes are blasted to roughen the pipe surface, then heat treated in an inert atmosphere such as argon or helium, and then further heat treated in a high temperature oxidizing atmosphere. , a method of forming an oxide film containing chromium oxide as the main component has been proposed, but this method also requires two heat treatments and the formed film is porous, making it difficult to use. Depending on the temperature, it would peel off due to cooling/heating cycles. Further, the far-infrared radiation layer containing chromium oxide as a main component has not very high emissivity, and furthermore, hexavalent chromium is generated by highly corrosive substances such as common salt, so it is not very desirable. Purpose of the Invention The purpose of the present invention is to solve such conventional drawbacks and provide a method for manufacturing a far-infrared heater with a high emissivity in the far-infrared region and a low manufacturing cost that can be used in a high-temperature region of 500°C or higher. It is something to do. Structure of the Invention In order to achieve the above object, the present invention includes a heating wire disposed inside a metal pipe, and electrical insulating powder filled in a space between the heating wire and the metal pipe, and the metal pipe is blasted to a temperature of 800°C. The metal pipe is heat-treated in the above-mentioned reducing atmosphere to oxidize the nickel contained in the metal pipe on its surface to form a far-infrared radiation layer mainly composed of nickel oxide. It has a high far-infrared emissivity and can form a dense far-infrared radiation layer with good adhesion. 800 is heat treated in a reducing atmosphere of 800℃ or higher.
If the temperature is below ℃, the formation of oxide scale mainly composed of nickel oxide will be insufficient, and if treated in a reducing atmosphere, the adhesion of the oxide scale formed will be reduced in a neutral or oxidizing atmosphere. It's for a reason. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 and 4. Note that the same members as in the conventional one are given the same reference numerals, and the explanation thereof will be omitted. 11 is a metal pipe, length 413mm, outer diameter 8mm,
Stainless steel SUS304 and SUS321 with a wall thickness of 0.4 mm and iron-based alloy NCF800 (trade name Incoloy 800) were used. As the heating wire 12, a first class nichrome wire with a wire diameter of 0.29 mm was used, which was formed into a coil shape with a winding diameter of 2 mm, and terminal rods 13 were connected to both ends. A heating wire 12 with the terminal rod 13 connected to both ends is inserted into each metal pipe 11, and the metal pipe 11 is filled with fused magnesia powder as an electrical insulating powder 14, and then subjected to the steps of rolling, diameter reduction, and annealing. ,
The metal pipe 11 had a length of 500 mm and an outer diameter of 6.6 mm. After this, the surface of each metal pipe 11 is blasted with corundum (#60) abrasive,
Far-infrared heaters of sample numbers 4 to 28 were completed by heat-treating for 30 minutes at each temperature shown in the following table to form a far-infrared radiation layer 15 on the surface of the metal pipe 11. On the other hand, for comparison, sheathed heaters manufactured using the conventional process of rolling diameter reduction and annealing without blasting or heat treatment were also completed at the same time.
I gave it 2 or 3. The total emissivity of each heater of completed sample numbers 1 to 28 was measured and shown in the table.
【表】【table】
【表】
また、この表にはパイプ温度を600℃に設定し、
20分on−10分offを１サイクルとして通電した時
の、パイプ表面上の酸化スケールの剥離テストを
行い、1000サイクル後の剥離度合を同様に示し
た。
なお、○印は剥離がないことを、×印は剥離が
生じたことを示す。
さらに、試料番号３、24、27の各ヒータについ
て、パイプ表面温度を600℃に設定した時の各波
長における放射率を測定し、結果を第４図に示し
た。第４図において、ａは試料番号３の、ｂは試
料番号24の、ｃは試料番号27の各ヒータの測定結
果を示す。
表より明らかなように、ブラスト処理後、800
℃以上の還元性雰囲気で熱処理した本発明の遠赤
外線ヒータである試料番号８、11、14、19、22、
23、25、26、27、28の各ヒータは、従来のシーズ
ヒータの製造工程で完成した試料番号１、２、３
のものと比較して、金属パイプ１１の材質にかか
わらず全放射率は高く、また600℃で使用しても
剥離は生じなかつた。
熱処理温度が800℃以下である試料番号４、５、
17、24のヒータおよび、中性または酸化性雰囲気
で処理した試料番号６、７、９、10、12、13、
15、16、18、20、21のヒータは全放射率が低い
か、または、酸化スケールの剥離が生じ、好まし
い結果を得ることはできなかつた。
また、第４図より明らかなように、ブラスト処
理し、熱処理することにより、各波長において放
射率は高くなつた。特に、熱処理温度において
は、高いほうがよく、放射率は各波長において高
くなつた。
金属パイプ１１の材料であるSUS304、
SUS321等のステンレス鋼、およびNCF800の鉄
基合金は、いずれも、ニツケルを成分元素として
８％〜35％含有している。これらニツケルを含有
する金属パイプ１１をブラスト処理すると、表面
のごく薄い酸化クロムを主成分とする不働態被膜
が除去され、800℃以上の還元性雰囲気で熱処理
すると、酸化ニツケルまたは、酸化ニツケル・ク
ロムを主成分とする酸化被膜が形成される。
このようにして得られた酸化被膜よりなる遠赤
外線放射層１５は、従来のシーズヒータの製造方
法による焼鈍での熱処理工程で形成される酸化被
膜と異なる。
また、特開昭54−112034の熱処理工程で得られ
る酸化被膜とも異なり、非常に緻密であり、ま
た、被膜層も厚く、酸化ニツケル成分の含有量の
多いものとなる。
このように、遠赤外線放射率の優れた酸化ニツ
ケルを主成分とする遠赤外線放射層１５が形成さ
れるため、従来のものに比較して、遠赤外線放射
特性が大きい。
さらに、金属パイプ１１の酸化という現象を利
用すると共に、形成された酸化ニツケルを主成分
とする被膜の熱膨張係数が下地の金属パイプ１１
に近いため、600℃以上の高温で使用しても、金
属パイプ１１との密着性に優れ、剥離することが
ない。
また、従来のシーズヒータタイプの遠赤外線ヒ
ータは、各種遠赤外線放射物質を溶射による方法
で、被膜処理するため、製造コストが非常に高く
なるが、本発明の遠赤外線ヒータは、従来の製造
設備と、ランニングコストの安いブラスト設備だ
けで製造することができるため、製造コストは安
くなる。
なお、本発明は実施例に限定されるものではな
く、圧延後、すぐにブラスト処理し、熱処理して
もよい。
さらに、種々の形状に曲げ加工する場合は、圧
延減径、焼鈍後曲げ加工しブラスト熱処理する方
法では、ブラスト処理が困難となるため、上述し
たように、圧延後ブラスト処理し、熱処理後曲げ
加工する方法がよい。しかし、この場合の熱処理
は、少なくとも1050℃以上の温度が必要である。
発明の効果
本発明は、内部に充填材を介して電熱線を配し
た金属パイプをブラストおよび800℃以上の還元
性雰囲気中で熱処理し、酸化ニツケルを主成分と
する遠赤外線放射層を金属パイプの表面に形成さ
せることにより、放射率が大きく500℃以上の高
温領域で使用できる製造コストの安い遠赤外線ヒ
ータを提供することができるものである。[Table] Also, in this table, the pipe temperature is set to 600℃,
A peeling test was conducted on the oxide scale on the pipe surface when electricity was applied with one cycle of 20 minutes on and 10 minutes off, and the degree of peeling after 1000 cycles was similarly shown. Note that the mark ◯ indicates that there is no peeling, and the mark x indicates that peeling has occurred. Furthermore, for each heater of sample numbers 3, 24, and 27, the emissivity at each wavelength was measured when the pipe surface temperature was set at 600°C, and the results are shown in FIG. In FIG. 4, a shows the measurement results of each heater for sample number 3, b for sample number 24, and c for sample number 27. As is clear from the table, after blasting, 800
Sample numbers 8, 11, 14, 19, 22, far infrared heaters of the present invention heat-treated in a reducing atmosphere at temperatures above ℃
Heaters 23, 25, 26, 27, and 28 are sample numbers 1, 2, and 3 completed using the conventional sheathed heater manufacturing process.
The total emissivity was higher regardless of the material of the metal pipe 11, and no peeling occurred even when used at 600°C. Sample numbers 4, 5, where the heat treatment temperature is 800℃ or less,
Sample numbers 6, 7, 9, 10, 12, 13, treated with heaters 17 and 24 and a neutral or oxidizing atmosphere.
Heaters Nos. 15, 16, 18, 20, and 21 had low total emissivity or peeled off oxide scale, and it was not possible to obtain favorable results. Furthermore, as is clear from FIG. 4, the emissivity was increased at each wavelength by blasting and heat treatment. In particular, the higher the heat treatment temperature, the better, and the emissivity increased at each wavelength. SUS304, the material of metal pipe 11,
Stainless steel such as SUS321 and iron-based alloy NCF800 both contain 8% to 35% of nickel as a constituent element. When these nickel-containing metal pipes 11 are blasted, the very thin passive coating on the surface mainly composed of chromium oxide is removed, and when heat treated in a reducing atmosphere of 800°C or higher, nickel oxide or nickel/chromium oxide is removed. An oxide film containing as the main component is formed. The far-infrared radiation layer 15 made of the oxide film thus obtained is different from the oxide film formed in the annealing heat treatment step in the conventional sheathed heater manufacturing method. Further, unlike the oxide film obtained by the heat treatment process of JP-A-54-112034, it is very dense, the film layer is thick, and the content of the nickel oxide component is high. In this way, the far-infrared radiation layer 15 mainly composed of nickel oxide with excellent far-infrared emissivity is formed, so that the far-infrared radiation characteristic is greater than that of the conventional layer. Further, by utilizing the phenomenon of oxidation of the metal pipe 11, the coefficient of thermal expansion of the formed coating mainly composed of nickel oxide is
, so it has excellent adhesion to the metal pipe 11 and will not peel off even when used at high temperatures of 600° C. or higher. In addition, conventional sheathed heater type far infrared heaters are coated with various far infrared emitting substances by thermal spraying, which increases manufacturing costs.However, the far infrared heater of the present invention can be manufactured using conventional manufacturing equipment. Since it can be manufactured using only blasting equipment with low running costs, manufacturing costs are low. Note that the present invention is not limited to the embodiments, and blasting and heat treatment may be performed immediately after rolling. Furthermore, when bending into various shapes, blasting becomes difficult with the method of rolling diameter reduction, annealing, bending, and blasting heat treatment. It is better to do this. However, the heat treatment in this case requires a temperature of at least 1050°C or higher. Effects of the Invention The present invention involves blasting and heat-treating a metal pipe with heating wires arranged inside it through a filler in a reducing atmosphere of 800°C or higher, and applying a far-infrared radiation layer mainly composed of nickel oxide to the metal pipe. By forming it on the surface of the infrared rays, it is possible to provide a far-infrared heater that has a high emissivity and can be used in a high temperature region of 500° C. or higher and is inexpensive to manufacture.
第１図は、従来のシーズヒータの断面図、第２
図は従来の遠赤外線ヒータの断面図、第３図は、
本発明の実施例における遠赤外線ヒータの断面
図、第４図は各ヒータの波長に対する放射率を示
すグラフである。
１１……金属パイプ、１２……電熱線、１４…
…電気絶縁粉末、１５……遠赤外線放射層。
Figure 1 is a sectional view of a conventional sheathed heater, and Figure 2 is a sectional view of a conventional sheathed heater.
The figure is a cross-sectional view of a conventional far-infrared heater, and Figure 3 is
FIG. 4, which is a cross-sectional view of a far-infrared heater in an embodiment of the present invention, is a graph showing the emissivity of each heater with respect to wavelength. 11...Metal pipe, 12...Heating wire, 14...
...Electrical insulating powder, 15...Far infrared radiation layer.
Claims (1)
と金属パイプの空間に充填した電気絶縁粉末とを
備え、前記金属パイプはブラスト処理され800℃
以上の還元性雰囲気中で熱処理し金属パイプ中に
含まれるニツケルをその表面で酸化させて酸化ニ
ツケルを主成分とする遠赤外線放射層を形成する
遠赤外線ヒータの製造方法。1. A heating wire arranged inside a metal pipe, and electrical insulating powder filled in the space between the heating wire and the metal pipe, and the metal pipe is blasted and heated to 800°C.
A method for manufacturing a far-infrared heater, which comprises performing heat treatment in the above-described reducing atmosphere to oxidize nickel contained in a metal pipe on its surface to form a far-infrared radiation layer containing nickel oxide as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10704483A JPS6087A (en) | 1983-06-15 | 1983-06-15 | Far infrared ray heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10704483A JPS6087A (en) | 1983-06-15 | 1983-06-15 | Far infrared ray heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6087A JPS6087A (en) | 1985-01-05 |
| JPH0311072B2 true JPH0311072B2 (en) | 1991-02-15 |
Family
ID=14449093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10704483A Granted JPS6087A (en) | 1983-06-15 | 1983-06-15 | Far infrared ray heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6087A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419754Y2 (en) * | 1985-05-20 | 1992-05-06 | ||
| US4872180A (en) * | 1989-06-16 | 1989-10-03 | Gte Laboratories Incorporated | Method for reducing facet reflectivities of semiconductor light sources and device thereof |
| JP2582699B2 (en) * | 1992-01-10 | 1997-02-19 | 川崎製鉄株式会社 | Electromagnetic filter |
| JP2009259730A (en) * | 2008-04-21 | 2009-11-05 | Okazaki Mfg Co Ltd | Heater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5272339A (en) * | 1975-12-12 | 1977-06-16 | Tokyo Shibaura Electric Co | Heat radia tion material |
| JPS54112034A (en) * | 1978-02-22 | 1979-09-01 | Hitachi Heating Appliance Co Ltd | Infrared radiant heater |
| JPS5755085A (en) * | 1980-09-19 | 1982-04-01 | Ngk Spark Plug Co | Infrared ray radiation type ceramic heater and method of producing same |
-
1983
- 1983-06-15 JP JP10704483A patent/JPS6087A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5272339A (en) * | 1975-12-12 | 1977-06-16 | Tokyo Shibaura Electric Co | Heat radia tion material |
| JPS54112034A (en) * | 1978-02-22 | 1979-09-01 | Hitachi Heating Appliance Co Ltd | Infrared radiant heater |
| JPS5755085A (en) * | 1980-09-19 | 1982-04-01 | Ngk Spark Plug Co | Infrared ray radiation type ceramic heater and method of producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6087A (en) | 1985-01-05 |
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