JPS6237512B2 - - Google Patents
Info
- Publication number
- JPS6237512B2 JPS6237512B2 JP54052006A JP5200679A JPS6237512B2 JP S6237512 B2 JPS6237512 B2 JP S6237512B2 JP 54052006 A JP54052006 A JP 54052006A JP 5200679 A JP5200679 A JP 5200679A JP S6237512 B2 JPS6237512 B2 JP S6237512B2
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- heating element
- particles
- furnace
- predetermined temperature
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000010954 inorganic particle Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Resistance Heating (AREA)
- Ceramic Products (AREA)
- Furnace Details (AREA)
Description
本発明は、炭素粒子を接触抵抗発熱体として用
いた電気抵抗発熱炉に関するものである。
従来の此種発熱炉は炭素粒子を電極間に充填し
て通電するものであるが、炭素粒子の抵抗値は高
温領域では急激に低減するから、電圧、電流制御
が困難であつた。
本発明はこの様な問題を一掃し得る発熱炉を提
供するものである。
以下に本発明発熱炉を添付図面につき説明する
と図中１，２は黒鉛電極で、炉体３内に対設され
ている。
上記電極１，２間には発熱体４，４………が充
填されており、又上記電極１，２は、電源回路例
えば定電力制御回路５に接続されている。
上記発熱体４は、植物を炭化した後粉砕して得
られた炭素粒子４ａと、所定の温度以下では電気
的に絶縁体である反面所定の温度を超えると半導
体又は導体となる金属化合物の無機粒子４ｂと此
等粒子４ａ，４ｂを結合する炭化バインダ４ｃと
により組成されている。
そしてこの炭化バインダ４ｃには焼結工程によ
つて炭化する接着剤、例えばポリビニルアルコー
ルを用いれば良い。
上記発熱体４の炭素粒子４ａと無機粒子４ｂと
の割合は炭素粒子の方が格段と多く、例えば４対
１や５対１に設定される。
この発熱体４を製造する方法の１例を下記に述
べる。
実施例
粒度500メツシユの炭素粒子 ５部
粒度500メツシユの硅石 １部
ポリビニルアルコール 0.5部
水 １部
上記物質を混〓して練片を作り、これを電気炉
に入れて1500℃で１時間加熱し、次いで冷却後粉
砕して0.1〜１ｍ／ｍの大きさの発熱体を得た。
この発熱体４を用いた処、表１の如き結果が得
られ、従来の炭素粒子のみの発熱体の表２に示す
結果を比較して時間経過中における電圧降下特性
及び電流増加特性が緩やかである事が確認され
た。本発明発熱炉は、この様なものであるから、
電極１，２間に電流を流すと、発熱体４，４の接
触界面から抵抗熱が発生し、この熱が発熱体４に
保熱されつつ炉内温度が上昇する。
この温度上昇による発熱体４の抵抗変化は電流
の量の変化となつて現らわれるから、定電力制御
回
The present invention relates to an electric resistance heating furnace using carbon particles as a contact resistance heating element. Conventional heat-generating furnaces of this type charge electricity by filling carbon particles between the electrodes, but the resistance value of the carbon particles decreases rapidly in high temperature regions, making it difficult to control voltage and current. The present invention provides an exothermic furnace that can eliminate such problems. The heat-generating furnace of the present invention will be described below with reference to the accompanying drawings. In the drawings, reference numerals 1 and 2 represent graphite electrodes, which are placed oppositely in the furnace body 3. Heat generating elements 4, 4, . . . are filled between the electrodes 1, 2, and the electrodes 1, 2 are connected to a power supply circuit, for example, a constant power control circuit 5. The heating element 4 is made of carbon particles 4a obtained by carbonizing and pulverizing plants, and an inorganic metal compound that is an electrical insulator below a predetermined temperature, but becomes a semiconductor or a conductor when the temperature exceeds a predetermined temperature. It is composed of particles 4b and a carbonized binder 4c that binds these particles 4a and 4b. The carbonized binder 4c may be an adhesive that is carbonized during the sintering process, such as polyvinyl alcohol. The ratio of carbon particles 4a to inorganic particles 4b in the heating element 4 is much larger for carbon particles, and is set to, for example, 4:1 or 5:1. An example of a method for manufacturing this heating element 4 will be described below. Example 5 parts of carbon particles with a particle size of 500 mesh 1 part of silica with a particle size of 500 mesh 1 part polyvinyl alcohol 0.5 parts water 1 part The above substances were mixed to make a powder, which was then heated in an electric furnace at 1500°C for 1 hour. Then, after cooling, it was pulverized to obtain a heating element with a size of 0.1 to 1 m/m. When this heating element 4 was used, the results shown in Table 1 were obtained, and when compared with the results shown in Table 2 for a conventional heating element made of only carbon particles, the voltage drop characteristics and current increase characteristics over time were found to be gradual. Something has been confirmed. Since the exothermic furnace of the present invention is as described above,
When a current is passed between the electrodes 1 and 2, resistance heat is generated from the contact interface between the heating elements 4 and 4, and while this heat is retained by the heating element 4, the temperature in the furnace increases. Since the resistance change of the heating element 4 due to this temperature rise appears as a change in the amount of current, the constant power control circuit
【表】【table】
【表】
路５によつて電流、電圧の調整がなされる。
本発明発熱炉は、発熱体４が無機粒子４ｂを含
有しているため、保熱性能を大きくして炉内温度
の上昇を促進する事が出来る利益がある他、炉内
温度が所定温度以上になると、無機粒子４ｂが固
定抵抗として作用する事になるから、発熱体４全
体の抵抗変化特性を緩やかにする事が出来、従つ
て電圧、電流制御も容易になると云う利益もあ
る。[Table] Current and voltage are adjusted by line 5. In the heat-generating furnace of the present invention, since the heating element 4 contains inorganic particles 4b, there is an advantage that the heat retention performance is increased and the rise in the temperature inside the furnace is promoted, and the temperature inside the furnace is higher than a predetermined temperature. In this case, since the inorganic particles 4b act as a fixed resistance, the resistance change characteristics of the entire heating element 4 can be made gentler, and there is also the advantage that the voltage and current can be easily controlled.
第１図は本発明発熱炉の略解側面図、第２図は
同上発熱炉に使用する発熱体の略解断面図であ
る。図中１，２は電極、３は炉体、４は発熱体、
５は電源回路としての定電力制御回路を示す。
FIG. 1 is a schematic side view of the heat-generating furnace of the present invention, and FIG. 2 is a schematic cross-sectional view of a heating element used in the heat-generating furnace. In the figure, 1 and 2 are electrodes, 3 is a furnace body, 4 is a heating element,
5 shows a constant power control circuit as a power supply circuit.
Claims (1)
上記電極間に充填された多数の発熱体と、上記電
極間に電流を供給する電源回路とを備え、上記発
熱体は植物の炭素粒子と無機粒子と此等粒子を接
着する炭化バインダから成り、上記無機粒子は所
定温度以下では電気的に絶縁体である反面、所定
温度を超えると導体又は半導体となる特性を有し
ている事を特徴とした電気抵抗発熱炉。1. A furnace body in which at least one pair of electrodes are arranged facing each other,
It comprises a large number of heating elements filled between the electrodes, and a power supply circuit that supplies current between the electrodes, the heating element is made of carbon particles of plants, inorganic particles, and a carbonized binder that adheres these particles, An electric resistance heating furnace characterized in that the inorganic particles are electrically insulating at temperatures below a predetermined temperature, but become conductors or semiconductors when the temperature exceeds a predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5200679A JPS55163790A (en) | 1979-04-28 | 1979-04-28 | Electric resistance heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5200679A JPS55163790A (en) | 1979-04-28 | 1979-04-28 | Electric resistance heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55163790A JPS55163790A (en) | 1980-12-20 |
| JPS6237512B2 true JPS6237512B2 (en) | 1987-08-12 |
Family
ID=12902728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5200679A Granted JPS55163790A (en) | 1979-04-28 | 1979-04-28 | Electric resistance heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55163790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0338212U (en) * | 1989-08-25 | 1991-04-12 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63143936A (en) * | 1986-12-06 | 1988-06-16 | Kokusai Sounetsu Kaihatsu Kk | Manufacture of various materials by electric resistance heating furnace |
-
1979
- 1979-04-28 JP JP5200679A patent/JPS55163790A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0338212U (en) * | 1989-08-25 | 1991-04-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55163790A (en) | 1980-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2371211A (en) | Electrical resistance element | |
| JPH0359558B2 (en) | ||
| US2933586A (en) | Electrical heating appliances | |
| US1127281A (en) | Resistance-wire for electric heaters. | |
| US2459282A (en) | Resistor and spabk plug embodying | |
| US4292505A (en) | Furnace for generating heat by electrical resistance | |
| US3027529A (en) | Resistor with high positive temperature coefficient | |
| JPS6237512B2 (en) | ||
| US2296045A (en) | Spark plug electrode | |
| US3450570A (en) | Method of producing semi-conductive electronegative element of a battery | |
| US1989736A (en) | Method of manufacturing heating elements | |
| EP0062356A1 (en) | Inductive heating device and method utilizing a heat insulator and workpieces heated thereby | |
| US3050833A (en) | Method of making electrically insulated heating units | |
| JPS6237511B2 (en) | ||
| US4676996A (en) | Method of producing a foamed multiple thermocouple | |
| WO1981003238A1 (en) | Resistant heat generating element and method of manufacturing same | |
| US1192457A (en) | Resistance-wire for electric heaters. | |
| US3116253A (en) | Composition of matter | |
| JPS6024552B2 (en) | Sea heater | |
| US1452954A (en) | Pack for electrical heating elements | |
| SU608271A1 (en) | Method of manufacturing current-conducting material for heaters | |
| JP2586486B2 (en) | Positive resistance temperature coefficient heating element | |
| US998067A (en) | Terminal for incandescing conductors. | |
| JPH0235436B2 (en) | ||
| JPH07118068A (en) | Carbon-boron carbide sintered compact for thermoelectric element and thermoelectric element using the same |