JPH0699079A - Electric heating carrier for purification of exhaust gas - Google Patents
Electric heating carrier for purification of exhaust gasInfo
- Publication number
- JPH0699079A JPH0699079A JP4273541A JP27354192A JPH0699079A JP H0699079 A JPH0699079 A JP H0699079A JP 4273541 A JP4273541 A JP 4273541A JP 27354192 A JP27354192 A JP 27354192A JP H0699079 A JPH0699079 A JP H0699079A
- Authority
- JP
- Japan
- Prior art keywords
- electric heating
- carrier
- exhaust gas
- heating type
- present
- 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
- 238000005485 electric heating Methods 0.000 title claims abstract description 32
- 238000000746 purification Methods 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 230000020169 heat generation Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000007772 electrode material Substances 0.000 description 16
- 239000003054 catalyst Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、排気ガス浄化用に使用
される通電発熱式担体に関する。更に詳しくは、本発明
は、内燃機関のコールドスタート時の排気ガスを浄化す
るために排気ガス浄化装置のプレヒータあるいはメイン
コンバータ（主触媒）として使用される通電発熱式担体
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating carrier used for purifying exhaust gas. More specifically, the present invention relates to an electric heating type carrier used as a preheater or a main converter (main catalyst) of an exhaust gas purifying apparatus for purifying exhaust gas at the cold start of an internal combustion engine.
【０００２】[0002]
【従来の技術】従来、排気ガス浄化用触媒（例えば、P
t,Rh,Pdなど）を担持させる担持母体として、耐熱性で
かつ薄肉金属板製の平板状帯材と波板状帯材を相互に当
接するように折畳みあるいは重積してハニカム状構造と
したハニカム担体が良く知られている。この金属製ハニ
カム担体は、セラミックス材料で製作されているセラミ
ック担体よりも、耐久性や能性などの点で優れているも
のである。2. Description of the Related Art Conventionally, an exhaust gas purifying catalyst (for example, P
t, Rh, Pd, etc.) is used as a support base for supporting heat-resistant and thin metal plate flat-plate strips and corrugated strips so that they are in contact with each other or folded to form a honeycomb structure. Known honeycomb carriers are well known. This metallic honeycomb carrier is superior in durability and efficiency to a ceramic carrier made of a ceramic material.
【０００３】しかしながら、前記したメタル製ハニカム
体は、最近の強化されて来ている規制に対しては、まだ
不十分なものである。特に、最近においては、内燃機関
のコールド・スタート時に排出される排気ガスの浄化に
ついてまで規制が強化されようとして来ている。このた
め、前記メタル製ハニカム体の前にプレヒータを配設し
たり、あるいはメタル製ハニカム体それ自体を通電発熱
式にしたりする試みが多くなされている（実開昭63-676
09号、特開平2-277916号、特開平3-193141号、実開平3-
72953 号、特公表3-504405号など）。これらの提案は、
予めメタル製ハニカム体を該ハニカム体に担持された排
気ガス触媒の最適な操作温度あるいはそれに近い温度に
まで加熱しておき、内燃機関のコールド・スタート時の
排気ガスを大気中に放出する前に浄化しようとするもの
である。However, the above-mentioned metal honeycomb body is still inadequate to the regulations that have recently been strengthened. In particular, in recent years, regulations have been tightened up to the purification of exhaust gas emitted at the cold start of an internal combustion engine. For this reason, many attempts have been made to dispose a preheater in front of the metal honeycomb body, or to make the metal honeycomb body itself of an electric heating type (Actual exploitation 63-676).
09, JP-A-2-277916, JP-A-3-193141, 3-Kaihei 3-
72953, Special Publication No. 3-504405, etc.). These suggestions are
Before heating the exhaust gas at the cold start of the internal combustion engine to the atmosphere by heating the metal honeycomb body to the optimum operating temperature of the exhaust gas catalyst supported on the honeycomb body or a temperature close to the optimum operating temperature. It is the one to purify.
【０００４】前記した電気加熱式の排気ガス用触媒コン
バータは、当業界においてはＥＨＣ(Electrical Heated
catalyst,Electrically Heated Start up Catalyst)と
呼ばれているものであり、目下栄んに研究開発されてい
るものである。なお、前記ＥＨＣにおいて、排気ガスの
浄化系に二次空気を導入して浄化効果を高めようとする
提案もなされている。The above-described electrically heated catalytic converter for exhaust gas is used in the industry by EHC (Electrical Heated).
catalyst, Electrically Heated Start up Catalyst), which is currently being researched and developed. In the above EHC, there is also a proposal to introduce secondary air into the exhaust gas purification system to enhance the purification effect.
【０００５】しかしながら、これら電気加熱式触媒コン
バータ（ＥＨＣ）においても、多くの問題点をかかえて
いる。例えば、ハニカム体自体を発熱式とする場合、メ
タル製であるために電流はハニカム体内を最短距離で反
対電極に達してしまい、発熱のために十分に大きな電気
抵抗値が得られにくい。これを解消しようとして、極
力、通電距離を長くして所望の電気抵抗が得られるよう
に、ハニカム体内に電気絶縁体を配設あるいはハニカム
体に電気絶縁物質を被覆すると、ハニカム体の強度や製
造面に問題が出てくることになる。However, these electrically heated catalytic converters (EHC) also have many problems. For example, when the honeycomb body itself is of a heat generation type, since it is made of metal, the current reaches the opposite electrode in the honeycomb body at the shortest distance, and it is difficult to obtain a sufficiently large electric resistance value for heat generation. In order to solve this, as long as possible, to provide a desired electrical resistance by energizing the energization distance, by disposing an electrical insulator in the honeycomb body or coating the honeycomb body with an electrically insulating material, the strength and production of the honeycomb body can be improved. There will be problems on the surface.
【０００６】[0006]
【発明が解決しようとする問題点】本発明は、前記した
通電発熱式ハニカム体（ＥＨＣ）の欠点に鑑みなされた
ものであり、従来と全く考え方を異にするものである。
本発明者らも、従来の通電発熱式のメタル製ハニカム体
のカテゴリーに属する種々の提案をなして来たが、ハニ
カム体内部のいずれの部位をも均一に加熱することが極
めて困難であることを認識している。本発明者らは、こ
の問題を解消すべく検討している仮定で、ハニカム体内
部をより均一に加熱するには、対向する電極間に耐熱性
の所望な電気抵抗を有する金属線を植生したときは、電
極間に均一な加熱条件が形成されるのではないかと考え
るに至った。本発明は、前記考え方をベースにしたもの
であり、本発明の排気ガス浄化用の通電発熱式担体によ
り熱応答性が良好で、かつ従来の通電発熱式ハニカム体
（平板状帯材と波板状帯材などで構成されるもの。）に
はみられない効果が発現されることが見い出された。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the electric heating type honeycomb body (EHC), and is completely different from the conventional method.
The inventors of the present invention have also made various proposals belonging to the category of conventional electric heating type honeycomb bodies made of metal, but it is extremely difficult to uniformly heat any portion inside the honeycomb body. I am aware of Under the assumption that the present inventors are investigating to solve this problem, in order to heat the inside of the honeycomb body more uniformly, a metal wire having a desired heat-resistant electrical resistance was vegetated between the opposing electrodes. Then, it was thought that a uniform heating condition might be formed between the electrodes. The present invention is based on the above-mentioned concept, and has good thermal response due to the electric heating type carrier for exhaust gas purification of the present invention, and also has a conventional electric heating type honeycomb body (a flat strip and a corrugated plate). It was found that an effect not seen in the one composed of strip-shaped material etc.) is exhibited.
【０００７】[0007]
【問題点を解決するための手段】本発明を概説すれば、
本発明は、排気ガス浄化用の通電発熱式の担体におい
て、前記担体が、(i) 対向する二つの電極(E1 ,E2 ) を
有し、かつ、(ii)前記二つの電極(E1 ,E2 ) 間に通電発
熱性の金属線(W1 〜 Wn ) が配設されたもの、から成る
ことを特徴とする排気ガス浄化用の通電発熱式担体に関
するものである。The present invention will be summarized as follows.
The present invention provides a carrier of an electric heating type for purifying exhaust gas, wherein the carrier has (i) two electrodes facing each other (E 1 , E 2 ), and (ii) the two electrodes (E The present invention relates to an electric heating type carrier for purifying exhaust gas, characterized in that the electric heating exothermic metal wire (W 1 to W n ) is disposed between ( 1 , E 2 ).
【０００８】以下、本発明の技術的構成及び実施態様に
ついて、図面を参照して詳しく説明する。前記したよう
に、本発明の最大の特徴点は、従来の通電発熱式ハニカ
ム体／触媒コンバータ（ＥＨＣ）において、主要な構成
要素としてのハニカム体に代えて、該ハニカム体の機能
を対向する電極間に配設された数多くの金属線に代替さ
せている点である。従って、本発明においては、ハニカ
ム体を使用していないので通電発熱式担体という用語が
用いられる。The technical constitution and embodiments of the present invention will be described below in detail with reference to the drawings. As described above, the greatest feature of the present invention is that, in the conventional electric heating type honeycomb body / catalyst converter (EHC), instead of the honeycomb body as a main constituent element, the electrodes having the functions of the honeycomb body facing each other are provided. The point is that a large number of metal wires arranged between them are substituted. Therefore, in the present invention, since the honeycomb body is not used, the term "electric heating type carrier" is used.
【０００９】図１〜図２は、本発明の通電発熱式担体
(A) の第一実施態様を示す。その全体形状は長方体であ
り、図１は斜視図、図２は排気ガス流方向(F) からみた
断面図である。図１〜図２において、上下電極材(E1 ,E
2 ) は、正負（＋，−）極としてリード線(l1 ,l2 ) を
介して外部電極(B) に接続されるとともに、長方体状の
通電発熱式担体(A) の上部、下部を構成する。また、両
側壁(S1 ,S2 ) は、前記上下電極材(E1 ,E2 ) に電気的
に絶縁されて固着されるとともに、通電発熱式担体(A)
の強度を十分なものにする。1 and 2 show an electric heating type carrier of the present invention.
The 1st embodiment of (A) is shown. The overall shape is a rectangular parallelepiped, FIG. 1 is a perspective view, and FIG. 2 is a sectional view as seen from the exhaust gas flow direction (F). 1 and 2, the upper and lower electrode materials (E 1 , E
2 ) is connected to the external electrode (B) via the lead wires (l 1 , l 2 ) as positive and negative (+, −) poles, and is provided on the upper part of the rectangular electric heating carrier (A), Make up the lower part. Both side walls (S 1 , S 2 ) are electrically insulated and fixed to the upper and lower electrode members (E 1 , E 2 ), and an electric heating carrier (A)
Make the strength of.
【００１０】本発明の通電発熱式担体(A) の最大の特徴
点は、上下電極材(E1 ,E2 ) 間に耐熱性で所望の電気抵
抗値を有する金属線(W1 〜 Wn ，但しｎは任意の数) が
配設される点である。前記金属線(W1 〜 Wn ）として
は、例えばＮｉ−Ｃｒ，２０Ｃｒ−５Ａｌ−ＲＥＭ，２
５Ｃｒ−７Ａｌ製の断面円形のワイヤー，偏平細線（箔
状のものを含む）などが使用される。また、前記金属線
(W1 〜 Wn ）の直線状のものや、後述するようにスパイ
ラル形状のもの（始端から終端にかけてスパイラル径が
漸次、大きくなるスパイラル形状のものを含む。）など
が使用される。本発明において、前記金属線(W1 〜
Wn ）の配設密度は、断面形状や外観形状により相違す
るが、例えば外径０．７mm、直線状金属線の場合、５本
／cm2 〜２５本／cm2 の割合で配設すればよい。The greatest feature of the electric heating type carrier (A) of the present invention is that the metal wires (W 1 to W n ) having heat resistance and a desired electric resistance value are provided between the upper and lower electrode materials (E 1 , E 2 ). , Where n is an arbitrary number). Examples of the metal wires (W 1 to W n ) include Ni-Cr, 20Cr-5Al-REM, 2
A 5Cr-7Al wire having a circular cross section, a flat thin wire (including a foil-like wire), and the like are used. Also, the metal wire
A straight line (W 1 to W n ) or a spiral form (including a spiral form in which the spiral diameter gradually increases from the start end to the end) as described later is used. In the present invention, the metal wire (W 1 ~
The disposition density of W n ) varies depending on the cross-sectional shape and the external shape, but for example, in the case of an outer diameter of 0.7 mm and a straight metal wire, the disposition density should be 5 wires / cm 2 to 25 wires / cm 2. Good.
【００１１】この種の通電発熱式担体(A) の要求特性と
しては、例えば消費電流３００〜６００Ａ，発熱温度３
００〜５００℃，設定最適温度までの所要時間５〜１５
秒などが要求されているため、これらの要求が満足され
るように金属線(W1 〜 Wn ）を配設すればよい。本発明
において、第１図に示される外部電源(B) としては直流
でも交流であっても構わないことはいうまでもないこと
である。また上下電極材(E1 ,E2 ) と外部電源(B) の接
続は、担体(A) の所望の部位に取付けたセンサー（熱電
対など）により担体の温度や排気ガス温度を測定し、所
望のしきい値でオン−オフさせるようにしてもよく、そ
の接続態様に何等の制限を受けるものではない。更にま
た、本発明においては、前記対向する電極材(E1 ,E2 )
間に配設される金属線(W1 〜 Wn ）の配設態様に何等の
制限を受けるものではなく、所望の配設手段を採用すれ
ばよい。The required characteristics of this type of electric heating type carrier (A) are, for example, a consumption current of 300 to 600 A and a heating temperature of 3.
0 to 500 ° C, time required to set the optimum temperature 5 to 15
Since seconds and the like are required, the metal wires (W 1 to W n ) may be arranged so as to satisfy these requirements. In the present invention, it goes without saying that the external power source (B) shown in FIG. 1 may be DC or AC. In addition, the upper and lower electrode materials (E 1 , E 2 ) and the external power supply (B) are connected by measuring the temperature of the carrier and exhaust gas temperature with a sensor (such as a thermocouple) attached to the desired part of the carrier (A). It may be turned on / off at a desired threshold value, and the connection mode is not limited in any way. Furthermore, in the present invention, the opposing electrode materials (E 1 , E 2 )
The arrangement of the metal wires (W 1 to W n ) arranged between them is not limited in any way, and a desired arrangement means may be adopted.
【００１２】図３〜図４は、本発明の通電発熱式担体
(A) の第二実施態様を示す。その全体形状は円筒形状で
あり、図３は斜視図、図４は排気ガス流方向(F) からみ
た断面図である。FIGS. 3 to 4 show an electric heating type carrier according to the present invention.
The 2nd embodiment of (A) is shown. The overall shape is cylindrical, FIG. 3 is a perspective view, and FIG. 4 is a cross-sectional view as seen from the exhaust gas flow direction (F).
【００１３】第二実施態様のものにおいて、前記第一実
施態様のものと大きく相違する点は対向する電極材
(E1 ,E2 ) が、一方が担体(A) のケーシング(C) を兼ね
る外筒電極材(E1 ) であり、他方は円筒状担体の中心部
に配設される中心電極材(E2 ) となる点である。その他
の第二実施態様の技術的構成は第一実施態様のものと基
本的には同じである。The difference between the second embodiment and the first embodiment is that the opposite electrode materials are used.
(E 1 , E 2 ) is an outer cylinder electrode material (E 1 ), one of which also serves as the casing (C) of the carrier (A), and the other is the center electrode material (( 1 ) arranged at the center of the cylindrical carrier. E 2 ). The other technical configurations of the second embodiment are basically the same as those of the first embodiment.
【００１４】図５〜図６は、本発明の通電発熱式担体
(A) の第三実施態様を示す。その全体形状は円筒形状で
あり、図５は斜視図、図６は排気ガス流方向(F) からみ
た断面図である。FIGS. 5 to 6 show an electric heating type carrier of the present invention.
The 3rd embodiment of (A) is shown. The overall shape is cylindrical, FIG. 5 is a perspective view, and FIG. 6 is a cross-sectional view as seen from the exhaust gas flow direction (F).
【００１５】第三実施態様のものにおいて、前記第二実
施態様のものと大きく相違する点は、ケーシング(C) を
兼ねる外筒電極材(E1 ) と中心電極材(E2 ) の間に配設
される金属線(W1 〜 Wn ）の外観形状の点である。即
ち、前記第二実施態様のものにおいては放射状に直線状
の金属線(W1 〜 Wn）を配設しているものに対し、第三
実施態様のものはスパイラル形状の金属線(W1 〜 Wn ）
を配設している。しかも、前記スパイラル形状の金属線
(W1 〜 Wn ）として、中心電極材(E2 ) から外筒電極材
(E1 ) に至るに従って、スパイラル径が漸次、大きくな
るものを採用している。The difference between the third embodiment and the second embodiment is that between the outer cylinder electrode material (E 1 ) also serving as the casing (C) and the center electrode material (E 2 ). This is a point of the external shape of the metal wires (W 1 to W n ) to be arranged. That is, in the second embodiment, the linear metal wires (W 1 to W n ) are arranged radially, whereas in the third embodiment, the spiral metal wire (W 1 ~ W n )
Are installed. Moreover, the spiral-shaped metal wire
(W 1 to W n ) as the center electrode material (E 2 )
The spiral diameter gradually increases as it reaches (E 1 ).
【００１６】第三実施態様のものと、第二実施態様のも
のを比較すると、第三実施態様のものは前記したスパイ
ラル形状の金属線(W1 〜 Wn ）を採用しているので、中
心電極材(E2 ) を外筒電極材(E1 ) 間に該金属線を均一
に存在させることができる。一方、第二実施態様のもの
においては、中心電極材(E2 ) 側が外筒電極材(E1 )よ
り配設密度が大きくなってしまうため担体内部での排気
ガスの加熱が不均一化する傾向にある。Comparing the third embodiment and the second embodiment, the third embodiment employs the above-mentioned spiral-shaped metal wires (W 1 to W n ). The metal wire can be made to exist uniformly between the electrode material (E 2 ) and the outer cylinder electrode material (E 1 ). On the other hand, in the second embodiment, the central electrode material (E 2 ) side has a higher disposition density than the outer cylinder electrode material (E 1 ), so that the heating of the exhaust gas inside the carrier becomes uneven. There is a tendency.
【００１７】しかしながら、担体(A) が従来の平板状帯
材と波板状帯材で構成されるＥＨＣと比較して、その不
均一化はより小さいものである。これは、従来のＥＨＣ
においては、排気ガス流が、平板状帯材と波板状帯材の
当接により形成される網目状通気孔（セル）内に規制さ
れるのに対し、本発明の担体(A) においては排気ガス流
は金属線(W1 〜 Wn ）間に自由に拡散し得るからであ
る。前記した点は、本発明の担体(A) を単に加熱器とし
て使用するのでなく、該金属線(W1 〜 Wn ）の各表面に
排気ガス浄化用の触媒を担持させて加熱式の排気ガス浄
化器として使用する場合、重要な意義をもってくる。即
ち、本発明の担体(A) においては内部の加熱温度が均一
化し、均一な浄化率が達成されることになる。However, the nonuniformity is smaller than that of the EHC in which the carrier (A) is composed of the conventional flat strip and corrugated strip. This is the conventional EHC
In the carrier (A) of the present invention, the exhaust gas flow is regulated in the mesh-shaped ventilation holes (cells) formed by the contact between the flat strip and the corrugated strip. This is because the exhaust gas flow can freely diffuse between the metal wires (W 1 to W n ). The point described above is that the carrier (A) of the present invention is not simply used as a heater, but a catalyst for purifying exhaust gas is supported on each surface of the metal wire (W 1 to W n ) to heat-type exhaust gas. It has important significance when used as a gas purifier. That is, in the carrier (A) of the present invention, the internal heating temperature is made uniform and a uniform purification rate is achieved.
【００１８】[0018]
【発明の効果】本発明の多数の金属線(W1 〜 Wn ）を対
向する電極材(E1 ,E2 ) 間に配設した構造の排気ガス浄
化用の通電発熱式担体(A) は、従来の波板状帯材あるい
は該波板状帯材と平板状帯材で構成したハニカムタイプ
のものよりも下記に示すような優れた効果を奏するもの
である。EFFECT OF THE INVENTION An electric heating type carrier (A) for purifying exhaust gas having a structure in which a large number of metal wires (W 1 to W n ) of the present invention are arranged between opposing electrode materials (E 1 , E 2 ). Has the following excellent effects as compared with the conventional corrugated plate-shaped strip or a honeycomb type composed of the corrugated strip-shaped strip and the flat plate-shaped strip.
【００１９】(i) 本発明においては、加熱媒体が一定の
小断面積と一定の長さの通電ワイヤーで構成されている
ため、高い電気抵抗値が得られ、かつ局部的な加熱がな
い。そのため担体内部を均一に、かつ応答性良く所望の
加熱条件に加熱することができる。 (ii)排気系統、例えば自動車下部の排気系統において、
担体の配設のための空間に制約があっても、十分に対応
することができる。即ち、従来のものと比較して、設計
の自由度があり、断面形状が矩形状、円形状、三角形状
など所望のものが製作しやすい。 (iii)従来のハニカムタイプのものは、内部の加熱温度
の不均一に基づいて熱応力が不均一化し、特に中心部に
スコーピング（中心部位が外側へ飛び出す現像）が発生
したり、該熱応力のために構成部材（帯材）が離体、亀
裂、破損したりするが、本発明においてはこのような欠
点が解消される。 (iv)本発明の担体(A) に適用される金属線は、従来のハ
ニカムタイプの構成部材である帯材（帯材とした高価な
耐熱性の箔材を使用している。）より安価であるため、
経済的な担体(A) を提供することができる。なお、本発
明において担体(A) の金属線に排気ガス浄化用触媒を担
持させた場合、単なるヒータ（加熱器）としてではなく
触媒付きのプレヒータ（プレキャタライザー，助触媒）
やメインコンバーター（排気ガス浄化用の主触媒）とし
ても使用されるので、経済的なプレキャタライザーやメ
インコンバータを提供することができる。(I) In the present invention, since the heating medium is composed of a conducting wire having a constant small cross-sectional area and a constant length, a high electric resistance value can be obtained and no local heating is performed. Therefore, the inside of the carrier can be uniformly and responsively heated to desired heating conditions. (ii) In the exhaust system, for example, the exhaust system at the bottom of the vehicle,
Even if there is a restriction on the space for disposing the carrier, it can be sufficiently dealt with. That is, compared with the conventional one, there is a degree of freedom in design, and it is easy to manufacture a desired cross-sectional shape such as a rectangular shape, a circular shape, or a triangular shape. (iii) In the conventional honeycomb type, the thermal stress becomes non-uniform due to the non-uniformity of the internal heating temperature, and in particular, scoping (development in which the central portion jumps to the outside) occurs in the center, The component member (strip material) may be detached, cracked, or damaged due to the stress, but such a defect is eliminated in the present invention. (iv) The metal wire applied to the carrier (A) of the present invention is cheaper than a strip material (an expensive heat-resistant foil material is used as the strip material) which is a conventional honeycomb type constituent member. Because
An economical carrier (A) can be provided. In addition, in the present invention, when an exhaust gas purifying catalyst is carried on the metal wire of the carrier (A), a preheater (precatalyzer, cocatalyst) with a catalyst is used instead of a simple heater (heater).
Since it is also used as a main converter (main catalyst for exhaust gas purification), it is possible to provide an economical precatalyzer and main converter.
【図１】 本発明の通電加熱式担体の第一実施態様の斜
視図である。FIG. 1 is a perspective view of a first embodiment of an electric heating type carrier of the present invention.
【図２】 本発明の通電加熱式担体の第一実施態様の断
面図である。FIG. 2 is a cross-sectional view of a first embodiment of an electric heating type carrier of the present invention.
【図３】 本発明の通電加熱式担体の第二実施態様の斜
視図である。FIG. 3 is a perspective view of a second embodiment of the electrically heated carrier of the present invention.
【図４】 本発明の通電加熱式担体の第二実施態様の断
面図である。FIG. 4 is a sectional view of a second embodiment of the electrically heated carrier of the present invention.
【図５】 本発明の通電加熱式担体の第三実施態様の斜
視図である。FIG. 5 is a perspective view of a third embodiment of the electrically heated carrier of the present invention.
【図６】 本発明の通電加熱式担体の第三実施態様の断
面図である。FIG. 6 is a sectional view of a third embodiment of the electrically heated carrier of the present invention.
Ａ……………………通電加熱式担体 Ｅ1 ，Ｅ2 …………対向電極材 Ｗ1 〜Ｗn …………金属線 ｌ1 ，ｌ2 …………リード線 Ｓ1 ，Ｓ2 …………側壁部 Ｂ……………………外部電源 Ｃ……………………ケーシングA …………………… Electric heating type carrier E 1 , E 2 ………… Counter electrode material W 1 to W n ………… Metal wire l 1 , l 2 ………… Lead wire S 1 , S 2 ………… Side wall B …………………… External power supply C …………………… Casing
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０５Ｂ 3/00 ３３０ Ｚ 8918−3Ｋ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H05B 3/00 330 Z Z 8918-3K
Claims (6)
いて、前記担体が、 (i) 対向する二つの電極(E1 ,E2 ) を有し、かつ、 (ii)前記二つの電極(E1 ,E2 ) 間に通電発熱性の金属線
(W1 〜 Wn ) が配設されたもの、から成ることを特徴と
する排気ガス浄化用の通電発熱式担体。1. A carrier of an electric heating type for purifying exhaust gas, wherein the carrier has (i) two electrodes (E 1 , E 2 ) facing each other, and (ii) the two electrodes ( Metal wire with heat generation and energization between E 1 and E 2 )
An electrically-heated carrier for exhaust gas purification, comprising: (W 1 to W n ).
して、対向する二つの電極(E1 ,E2 ) が面電極である請
求項１に記載の通電発熱式担体。2. The electric heating type carrier according to claim 1 , wherein the two opposing electrodes (E 1 , E 2 ) are plane electrodes corresponding to the rectangular sectional shape of the carrier.
して、対向する二つの電極(E1 ,E2 ) の一方が円筒状の
外筒電極、他方が任意形状の中心電極である請求項１に
記載の通電発熱式担体。3. Corresponding to the circular cross-sectional shape of the carrier, one of the two opposing electrodes (E 1 , E 2 ) is a cylindrical outer cylinder electrode and the other is a center electrode of arbitrary shape. An electric heating type carrier according to claim 1.
である請求項１に記載の通電発熱式担体。4. The electric heating type carrier according to claim 1, wherein the metal wires (W 1 to W n ) have a circular cross section.
請求項１に記載の通電発熱式担体。5. The electric heating type carrier according to claim 1, wherein the metal wires (W 1 to W n ) are flat thin wires.
スパイラル形状のものである請求項１に記載の通電発熱
式担体。6. The electric heating type carrier according to claim 1, wherein the metal wires (W 1 to W n ) are linear or spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4273541A JPH0699079A (en) | 1992-09-18 | 1992-09-18 | Electric heating carrier for purification of exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4273541A JPH0699079A (en) | 1992-09-18 | 1992-09-18 | Electric heating carrier for purification of exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0699079A true JPH0699079A (en) | 1994-04-12 |
Family
ID=17529271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4273541A Pending JPH0699079A (en) | 1992-09-18 | 1992-09-18 | Electric heating carrier for purification of exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699079A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3954881A1 (en) * | 2020-08-14 | 2022-02-16 | Purem GmbH | Exhaust gas heating arrangement |
-
1992
- 1992-09-18 JP JP4273541A patent/JPH0699079A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3954881A1 (en) * | 2020-08-14 | 2022-02-16 | Purem GmbH | Exhaust gas heating arrangement |
| US11572817B2 (en) | 2020-08-14 | 2023-02-07 | Purem GmbH | Exhaust gas heating arrangement |
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