JPH05258840A - Ptc heating device - Google Patents
Ptc heating deviceInfo
- Publication number
- JPH05258840A JPH05258840A JP4089880A JP8988092A JPH05258840A JP H05258840 A JPH05258840 A JP H05258840A JP 4089880 A JP4089880 A JP 4089880A JP 8988092 A JP8988092 A JP 8988092A JP H05258840 A JPH05258840 A JP H05258840A
- Authority
- JP
- Japan
- Prior art keywords
- heaters
- resistance value
- ptc
- heating device
- parallel
- 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.)
- Granted
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子複写機、ファクシ
ミリ等のトナーの定着、あるいはビニール封着等の目的
に使用するＰＴＣ発熱装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PTC heating device used for the purpose of fixing toner or sealing vinyl in electronic copying machines, facsimiles and the like.
【０００２】[0002]
【従来の技術】ＰＴＣサーミスタを用いたヒータは、キ
ュリー点において、急激にその抵抗値が増大するため、
安全性が高い、立上り温度が速い、温度制御装置が不要
であるといった数々のメリットがあり、様々な分野で利
用されている。これらの特性のうち、立上り温度が速い
という長所を利用する場合、突入電流が大きくなり過ぎ
るという欠点があった。2. Description of the Related Art A heater using a PTC thermistor has a resistance value that rapidly increases at the Curie point.
It has many advantages such as high safety, fast rising temperature, and no need for temperature control device, and it is used in various fields. Among these characteristics, when utilizing the advantage that the rising temperature is fast, there is a drawback that the inrush current becomes too large.
【０００３】この欠点を解決するために、特開昭５５−
９７１４３号公報には、ＰＴＣサーミスタを負特性サー
ミスタと直列接続することが記載されている。特開昭５
４−１１５４４５号公報には、オーム性電極と非オーム
性電極を接合することが記載されている。特開昭４９−
２７９３２号公報には、キュリー点の異なる正特性サー
ミスタを組み合わせることが記載されている。また特開
昭６３−２１８１８４号公報には、位相温度制御装置を
使用することが記載されている。In order to solve this drawback, JP-A-55-
Japanese Patent Publication No. 97143 discloses that a PTC thermistor is connected in series with a negative characteristic thermistor. JP-A-5
Japanese Patent Laid-Open No. 4-115445 describes joining an ohmic electrode and a non-ohmic electrode. JP-A-49-
Japanese Patent No. 27932 describes combining positive temperature coefficient thermistors having different Curie points. Further, JP-A-63-218184 describes the use of a phase temperature control device.
【０００４】ところが、このような従来の技術では、回
路が複雑になり、工数がかかるという問題があった。特
に特開昭４９−２７９３２号公報に記載されたものの場
合、表面温度の低い所ができ、表面温度の均一性が要求
される定着装置等の用途には適さないという欠点があ
る。そのほかに、時間間隔を設けて複数の棒状ＰＴＣサ
ーミスタ素子を入電したり、出力と室温抵抗値から設定
する方法も考えられている。However, such a conventional technique has a problem that the circuit becomes complicated and the number of steps is increased. Particularly, in the case of the one described in Japanese Patent Laid-Open No. 49-27932, there is a defect that the surface temperature is low and it is not suitable for use in a fixing device or the like which requires a uniform surface temperature. Besides, a method of setting a time interval to input a plurality of rod-shaped PTC thermistor elements or setting from the output and the room temperature resistance value has been considered.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、これら
の方法によっても、立上り時間を短くし、かつ、比較的
大きな熱量と所定の表面温度を得ようとすると、使用す
る本数分だけの突入電流を避けることはできないという
欠点がある。また、前記のように１本だけ入電後、時間
間隔を設けて追加入電していく方法は、構成が複雑にな
るという欠点があった。However, even with these methods, if the rise time is shortened and a relatively large amount of heat and a predetermined surface temperature are to be obtained, an inrush current corresponding to the number of used wires is avoided. It has the drawback of not being able to. Further, as described above, the method of inputting only one power and then additionally powering at a time interval has a drawback that the configuration becomes complicated.
【０００６】そこで本発明が解決すべき課題は、付加的
回路や素子を用いることなく、ＰＴＣサーミスタ自体で
突入電流を抑制しながら、なおかつ立上りが速く、熱容
量の大きな発熱装置を提供することにある。[0006] Therefore, the problem to be solved by the present invention is to provide a heat generating device having a large heat capacity while suppressing the inrush current by the PTC thermistor itself without using an additional circuit or element and having a fast rise. ..
【０００７】[0007]
【課題を解決するための手段】この課題を解決するた
め、本発明は、ＰＴＣ素子を用いた棒状のヒータを（ｎ
＋１）本、並列接続して形成したＰＴＣ発熱装置におい
て、必要とする総合抵抗値をｘΩとし、そのうち１本の
抵抗値を（ｘ＋ｚ）Ω、残りｎ本の抵抗値をｙΩ以上と
したとき、 ｙ＝ｎｘ（ｘ／ｚ＋１）Ω（但し、０＜ｚ＜ｘ）・・・・・・・（１） を満たすように各抵抗値を設定した。好適には、複数本
のヒータの周辺に断熱材を介在させたものとする。In order to solve this problem, the present invention provides a rod-shaped heater (n) using a PTC element.
+1) In a PTC heating device formed by connecting in parallel, when the required total resistance value is xΩ, one of them has a resistance value of (x + z) Ω, and the remaining n resistance values are yΩ or more, Each resistance value was set so that y = nx (x / z + 1) Ω (where 0 <z <x) ... (1). It is preferable that a heat insulating material is provided around a plurality of heaters.
【０００８】また、複数本のヒータの周辺にシリコン樹
脂、エポキシ樹脂およびフッ素樹脂等により放熱板部分
以外の部分を固定する。Further, a portion other than the heat radiating plate portion is fixed around the plurality of heaters with a silicone resin, an epoxy resin, a fluorine resin or the like.
【０００９】（１）式は、図２の抵抗回路によって求め
ることができる。１つの抵抗の抵抗値をｘ＋ｚ、残りの
ｎ本の抵抗の抵抗値をｙ、並列接続回路全体の抵抗値を
ｘとすると、次の式が成り立つ。 １／ｘ＝１／（ｘ＋ｚ）＋ｎ×（１／ｙ） 移項して、 １／ｘ−１／（ｘ＋ｚ）＝ｎ／ｙ 通分して、 ｚ／ｘ（ｘ＋ｚ）＝ｎ／ｙ これから、 ｙ＝ｎｘ（ｘ＋ｚ）／ｚ＝ｎｘ（ｘ／ｚ＋１） として、（１）式が得られる。The equation (1) can be obtained by the resistance circuit shown in FIG. When the resistance value of one resistor is x + z, the resistance value of the remaining n resistors is y, and the resistance value of the entire parallel connection circuit is x, the following equation is established. 1 / x = 1 / (x + z) + n × (1 / y) Transferring, 1 / x−1 / (x + z) = n / y, and dividing z / x (x + z) = n / y Equation (1) is obtained with y = nx (x + z) / z = nx (x / z + 1).
【００１０】以上は抵抗値の関係を規制するものである
が、立上り特性を考慮して、（１）式の但し書きの条件
を付ける。すなわち、ｚをｘより小さいと規定した理由
は、ｘとｚが同じ値をとった場合には、例えば総計２本
としたとき、ｙ＝１・ｘ・（１＋１）＝２ｘとなり、そ
れぞれのヒータの抵抗値は２ｘとなって同じ値になる。
このような抵抗値の２本のヒータに通電した場合、両方
に同じ電流が同じ時間で流れるため、昇温速度が著しく
遅くなる。よってｚはｘより小さい値をとる必要があ
り、より速く昇温させようとする場合にはｚは０に近い
値の方がよい。The above is to regulate the relationship of the resistance value, but in consideration of the rising characteristic, the condition of the proviso of the equation (1) is added. That is, the reason why z is defined to be smaller than x is that when x and z have the same value, for example, when the total number is two, y = 1.x. (1 + 1) = 2x, and each heater is Has a resistance value of 2x, which is the same value.
When two heaters having such a resistance value are energized, the same current flows in both heaters at the same time, so that the temperature rising rate is remarkably slowed. Therefore, z needs to take a value smaller than x, and z is preferably close to 0 in order to raise the temperature faster.
【００１１】[0011]
【作用】本発明においては、電気的に複数本並列接続し
た発熱装置のヒータの抵抗値が（１）式を満たすのであ
れば、使用機器がどんな物でも許容される電流値を超え
ることがない。そのため、同時に複数本のヒータを入電
しても、最も抵抗値の低いヒータに大きな電流が流れ、
所定の温度に達すると同時に、他の高い抵抗値のヒータ
にも電流が流れていくため、突入電流をあまり大きくせ
ずに、立上りが速く、所定の温度に到達して、なおか
つ、全体の熱容量も大きな特性の発熱装置を得ることが
できる。In the present invention, as long as the resistance value of the heater of the heat generating device electrically connected in parallel satisfies the expression (1), the current value of any equipment used will not exceed the allowable current value. .. Therefore, even if multiple heaters are energized at the same time, a large current flows through the heater with the lowest resistance,
At the same time as reaching the specified temperature, the current also flows to the other heaters with high resistance value, so the inrush current does not increase too much, the rise is fast, the specified temperature is reached, and the total heat capacity is It is possible to obtain a heat generating device having great characteristics.
【００１２】[0012]
【実施例】以下、本発明を実施例に基づいて具体的に説
明する。 〔実施例〕図３（ａ）に示すように、キュリー点が２２
０℃の５ｍｍ幅×１０ｍｍ長さ×２．５ｍｍ厚のチタン
酸バリウムよりなるＰＴＣ素子１の相対する表面にＮｉ
メッキで電極膜２，２を形成した後、図３（ｂ）に示す
ように０．３ｍｍのアルミニウム電極板３，３間にＰＴ
Ｃ素子１を５個並列に接着してＰＴＣヒータ４を得て、
抵抗値を測定したところ、８０Ωであった。さらに熱容
量を増すために同様に抵抗値の大きなＰＴＣ素子を使用
して、抵抗値の総計が９０Ω以下になるように、（１）
式のｚに３を入れて算出し、ＰＴＣヒータ５を２本得
た。これらの抵抗値は５．５ＫΩと５．６ＫΩであっ
た。これらのＰＴＣヒータ４，５を図４に示すように３
本並列接続し、各々のヒータの間には断熱材を介在さ
せ、図１に示すようにシリコーン樹脂６により固定し
た。こうして得られた発熱素子に１００Ｖを印加したと
ころ、８秒以内で表面温度は２１０℃に到達し、最大突
入電流は３．５Ａであった。EXAMPLES The present invention will be specifically described below based on examples. Example As shown in FIG. 3A, the Curie point is 22.
Ni on the opposite surfaces of the PTC element 1 made of barium titanate having a width of 5 mm, a length of 10 mm and a thickness of 2.5 mm at 0 °
After forming the electrode films 2 and 2 by plating, as shown in FIG. 3B, the PT is formed between the 0.3 mm aluminum electrode plates 3 and 3.
Five C elements 1 are bonded in parallel to obtain a PTC heater 4,
When the resistance value was measured, it was 80Ω. In order to further increase the heat capacity, a PTC element having a large resistance value is also used so that the total resistance value is 90Ω or less. (1)
3 was put into z of the formula to calculate, and two PTC heaters 5 were obtained. These resistance values were 5.5 KΩ and 5.6 KΩ. As shown in FIG. 4, these PTC heaters 4 and 5 are
Mainly connected in parallel, a heat insulating material was interposed between the heaters, and the heaters were fixed with silicone resin 6 as shown in FIG. When 100 V was applied to the heating element thus obtained, the surface temperature reached 210 ° C. within 8 seconds and the maximum inrush current was 3.5 A.
【００１３】〔比較例１〕実施例と同様の操作により、
３本のＰＴＣヒータ４，５，５の抵抗値をそれぞれ２７
０Ω，２６０Ω，２７５Ωにして発熱装置を組み立て、
１００Ｖを印加したところ、最大突入電流は３．６Ａと
実施例と変わらなかったが、表面温度が２１０℃に到達
するまで２０秒近くかかった。これは、ヒータに流れる
電流が３本に均一に流れたためである。Comparative Example 1 By the same operation as in Example,
Set the resistance of each of the three PTC heaters 4, 5, and 27 to 27.
Assemble the heating device to 0Ω, 260Ω, 275Ω,
When a voltage of 100 V was applied, the maximum rush current was 3.6 A, which was similar to that in the example, but it took nearly 20 seconds until the surface temperature reached 210 ° C. This is because the current flowing through the heater was evenly distributed among the three heaters.
【００１４】〔比較例２〕実施例と同様の操作により、
３本のＰＴＣヒータ４，５，５の抵抗値をそれぞれ９３
Ω，９０Ω，９１Ωにして発熱装置を組み立て、１００
Ｖを印加したところ、１０秒以内で表面温度は２１０℃
に到達したが、最大突入電流は１０．１Ａであった。こ
れは、ヒータ全体の抵抗値が低くなったためである。[Comparative Example 2] By the same operation as in Example,
The resistance value of each of the three PTC heaters 4, 5 and 5 is set to 93.
Assemble the heating device to Ω, 90Ω, 91Ω,
When V is applied, the surface temperature is 210 ° C within 10 seconds.
However, the maximum inrush current was 10.1A. This is because the resistance value of the entire heater has decreased.
【００１５】〔比較例３〕実施例と同様の操作により、
３本のＰＴＣヒータ４，５，５の抵抗値をそれぞれ１８
０Ω，３６２Ω，３６０Ω（ｘ＝ｚの例）にして発熱装
置を組み立て、１００Ｖを印加したところ、最大突入電
流は３．７Ａであったが、表面温度が２１０℃に到達す
るまで１７秒近くかかった。これは、ヒータに流れる電
流が３本に分散したためである。Comparative Example 3 By the same operation as in Example,
Set the resistance value of each of the three PTC heaters 4, 5 and 5 to 18
When a heating device was assembled with 0Ω, 362Ω and 360Ω (x = z example) and 100V was applied, the maximum inrush current was 3.7A, but it took nearly 17 seconds until the surface temperature reached 210 ° C. It was This is because the current flowing through the heater was dispersed into three.
【００１６】〔比較例４〕実施例と同様の操作により、
３本のＰＴＣヒータ４，５，５の抵抗値をそれぞれ８０
Ω，５．６ＫΩ，５．９ＫΩにして、ヒータ間に間隔を
設けず、接近させて発熱装置を組み立て、１００Ｖを印
加したところ、最大突入電流は３．６Ａであったが、表
面温度が２１０℃に到達するまで２５秒近くかかった。
これは、速く立ち上がったヒータの熱が他の２本に拡散
したためである。[Comparative Example 4] By the same operation as in Example,
Set the resistance values of the three PTC heaters 4, 5 and 5 to 80
Ω, 5.6 KΩ, and 5.9 KΩ, the heaters were assembled close to each other without providing a space between the heaters, and 100 V was applied. The maximum inrush current was 3.6 A, but the surface temperature was 210. It took nearly 25 seconds to reach 0 ° C.
This is because the heat of the heater that rises quickly diffuses to the other two.
【００１７】以上の実施例と比較例とを対比してわかる
ように、（１）式により規定された抵抗値をもつＰＴＣ
ヒータを互いに熱的に絶縁して並列接続することによ
り、突入電流が抑えられるとともに、立上りが速い発熱
装置を得ることができた。As can be seen by comparing the above examples and comparative examples, the PTC having the resistance value defined by the equation (1).
By thermally insulating the heaters from each other and connecting them in parallel, it is possible to obtain a heat generating device that suppresses the inrush current and has a quick start-up.
【００１８】[0018]
【発明の効果】以上に説明したように、本発明によれば
下記の効果を奏する。 （１）式を満たす抵抗値のヒータを単に並列接続す
るという簡単な構成により、突入電流を抑えながら、な
おかつ立上りが速く、熱容量の大きな発熱装置を得るこ
とができる。 （１）式のｚの値を変化させることにより、任意に
立上りまでの時間、突入電流を抑制することができる。As described above, the present invention has the following effects. With a simple configuration in which heaters having resistance values that satisfy the expression (1) are simply connected in parallel, it is possible to obtain a heat generating device that suppresses the inrush current, has a fast rise, and has a large heat capacity. By changing the value of z in the equation (1), it is possible to arbitrarily suppress the time until the rise and the inrush current.
【図１】 本発明の実施例を示す発熱装置の斜視図であ
る。FIG. 1 is a perspective view of a heat generating device according to an embodiment of the present invention.
【図２】 （１）式を導き出すための並列回路の回路図
である。FIG. 2 is a circuit diagram of a parallel circuit for deriving equation (1).
【図３】 本発明の実施例のヒータの構成を示す説明図
である。FIG. 3 is an explanatory diagram showing a configuration of a heater according to an embodiment of the present invention.
【図４】 実施例および比較例のＰＴＣヒータの接続回
路図である。FIG. 4 is a connection circuit diagram of PTC heaters of Examples and Comparative Examples.
１ ＰＴＣ素子、２ 電極膜、３ 電極板、４，５ Ｐ
ＴＣヒータ、６ シリコーン樹脂1 PTC element, 2 electrode film, 3 electrode plate, 4,5 P
TC heater, 6 silicone resin
Claims (3)
＋１）本、並列接続して形成したＰＴＣ発熱装置におい
て、必要とする総合抵抗値をｘΩとし、そのうち１本の
抵抗値を（ｘ＋ｚ）Ω、残りｎ本の抵抗値をｙΩ以上と
したとき、ｙ＝ｎｘ（ｘ／ｚ＋１）Ω（但し、０＜ｚ＜
ｘ）の式を満たすように各抵抗値を設定したことを特徴
とするＰＴＣ発熱装置。1. A rod-shaped heater using a PTC element (n
+1) In a PTC heating device formed by connecting in parallel, when the required total resistance value is xΩ, one of them has a resistance value of (x + z) Ω, and the remaining n resistance values are yΩ or more, y = nx (x / z + 1) Ω (where 0 <z <
A PTC heating device, wherein each resistance value is set so as to satisfy the expression (x).
せたことを特徴とする請求項１記載のＰＴＣ発熱装置。2. The PTC heating device according to claim 1, wherein a heat insulating material is provided around a plurality of heaters.
エポキシ樹脂およびフッ素樹脂のいずれかにより放熱板
部分以外の部分を固定したことを特徴とする請求項１記
載のＰＴＣ発熱装置。3. A silicon resin around a plurality of heaters,
The PTC heat generating device according to claim 1, wherein a portion other than the heat radiating plate portion is fixed by either an epoxy resin or a fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08988092A JP3283898B2 (en) | 1992-03-13 | 1992-03-13 | PTC heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08988092A JP3283898B2 (en) | 1992-03-13 | 1992-03-13 | PTC heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05258840A true JPH05258840A (en) | 1993-10-08 |
| JP3283898B2 JP3283898B2 (en) | 2002-05-20 |
Family
ID=13983087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08988092A Expired - Fee Related JP3283898B2 (en) | 1992-03-13 | 1992-03-13 | PTC heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3283898B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6736490B2 (en) | 2002-03-29 | 2004-05-18 | Canon Kabushiki Kaisha | Ink jet recording head and non-linear electrical element |
| JP2010132055A (en) * | 2008-12-03 | 2010-06-17 | Panasonic Corp | Vehicle heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927932A (en) * | 1972-07-12 | 1974-03-12 | ||
| JPH0350421A (en) * | 1989-07-18 | 1991-03-05 | Sanyo Electric Co Ltd | Heating structure in heating and cooking device |
-
1992
- 1992-03-13 JP JP08988092A patent/JP3283898B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927932A (en) * | 1972-07-12 | 1974-03-12 | ||
| JPH0350421A (en) * | 1989-07-18 | 1991-03-05 | Sanyo Electric Co Ltd | Heating structure in heating and cooking device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6736490B2 (en) | 2002-03-29 | 2004-05-18 | Canon Kabushiki Kaisha | Ink jet recording head and non-linear electrical element |
| JP2010132055A (en) * | 2008-12-03 | 2010-06-17 | Panasonic Corp | Vehicle heater |
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| Publication number | Publication date |
|---|---|
| JP3283898B2 (en) | 2002-05-20 |
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