EP0543075A1 - Elément chauffant électrique pour un filtre à suie - Google Patents

Elément chauffant électrique pour un filtre à suie Download PDF

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Publication number
EP0543075A1
EP0543075A1 EP92101593A EP92101593A EP0543075A1 EP 0543075 A1 EP0543075 A1 EP 0543075A1 EP 92101593 A EP92101593 A EP 92101593A EP 92101593 A EP92101593 A EP 92101593A EP 0543075 A1 EP0543075 A1 EP 0543075A1
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EP
European Patent Office
Prior art keywords
heating element
rows
openings
row
sheet
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.)
Withdrawn
Application number
EP92101593A
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German (de)
English (en)
Inventor
Hubert Klöck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kanthal GmbH
Original Assignee
Kanthal GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kanthal GmbH filed Critical Kanthal GmbH
Publication of EP0543075A1 publication Critical patent/EP0543075A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an electric heating element of a soot filter for the exhaust gases of a diesel engine with a filter body, to which the heating element can be applied in order to heat the filter body through which exhaust gases flow for regeneration to a temperature at which soot particles of the exhaust gas burn,
  • the heating element essentially is formed cylindrically from sheet metal, with openings in the sheet extending along a main opening direction being aligned in rows in the opening direction and being offset from row to row, and wherein the heating element has at least two spaced-apart power connection elements, each extending in a connection direction, which in the are oriented essentially parallel to each other.
  • connection direction of the power connection elements is understood to mean the main direction in which these power connection elements extend, that is to say, in the case of the strip-shaped connection elements known in particular, the longitudinal direction of the strips.
  • the transition of the current paths between such a power connection element and the sheet metal of the heating element is approximately at right angles to the connection direction defined above.
  • Known electrical heating elements of this type are intended to heat the associated filter body on which they are arranged uniformly and high enough so that the soot particles that have accumulated in the filter body are as safe as possible at any point on the filter body, in particular also in the vicinity of its outlet end burn.
  • the temperature of the heating element should not be too high at any point because this quickly destroys the heating element and possibly also the surface areas of the filter body Consequence, which are applied to the heating element.
  • heating elements which consist of an expanded metal or a perforated plate, apart from other constructions made of wires (EP 0 275 372 B1).
  • these known heating elements can be designed as closed cylinders or open cylinders along the jacket.
  • the casing consists of a perforated plate, the holes are round and therefore do not have any particular opening direction. They are arranged in the sheet so that each hole is at the same distance from the holes adjacent to it. In this respect, too, no preferred direction is defined.
  • the individual current paths when this is connected to a voltage, are approximately triangular and relatively short. The current paths are very uneven in cross section, which results in a higher temperature in some areas.
  • the relatively short current paths correspond to a relatively low specific surface resistance, from which the requirement for a relatively thin sheet is derived in order to adapt the electrical resistance to the on-board voltage and the required power of the heating element.
  • the lifespan is therefore not as long as is desirable in many cases.
  • the present invention has for its object to provide an electrical heating element with which a relatively high specific surface resistance is achieved, so that the material thickness can be selected relatively large to achieve a long life of the heating element.
  • the heating element should be designed so that uniform heating by Joule heat occurs, which is also conducive to a long service life with good soot combustion over the entire area of the heating element.
  • This object is achieved in that the openings arranged in rows in the heating element are oriented essentially parallel to the connection direction. This results in a current distribution with approximately sinusoidal current paths, which are relatively long, as a result of the known offset of the openings of adjacent rows. This means a high specific surface resistance, which enables the use of thick sheet metal for the heating element, which therefore also has a long service life.
  • the power connection elements and the openings arranged in rows which are oriented in the main opening direction and are offset from one another from row to row, can be arranged in the circumferential direction of the heating element.
  • the power connection elements preferably enclose the ends of the heating elements, which are designed as closed cylinders could be. With the usual main dimensions of the heating element - length greater than diameter times ⁇ - the greatest surface resistances can be achieved.
  • the power connection elements and the openings arranged in rows which in turn are oriented in the main opening direction, can be oriented in the axial direction of the heating element.
  • the axial direction here means a direction parallel to the main axis of the cylindrical heating element.
  • These heating elements have an open cylindrical shape, which therefore has a non-electrically conductive recess in the axial direction, the power connection elements being arranged parallel to the recess at the adjacent material ends.
  • both of the above-mentioned variants can be carried out both with a perforated plate, the perforated plate having elongated holes as openings which extend in the main opening direction, as well as with rows of approximately diamond-shaped openings which also extend with their main opening direction in the direction of a row.
  • the version with diamond-shaped openings which can consist in particular of expanded material, does not have a quite as favorable specific surface resistance as the version with a perforated plate from which elongated holes are punched out of approximately constant width.
  • the stamped sheet metal design i.e. Perforated plate has the additional advantage that no connection strip needs to be soldered on.
  • the electrical heating element can be dimensioned particularly advantageously according to claim 5 so that webs in the sheet of the heating element are arranged between two in a row Openings are approximately twice as long as a width of material between the rows of openings. This results in an almost uniform current density over the effective area of the perforated plate, with the result of soot combustion at all points and a long service life.
  • the width of the current paths between the adjacent openings of a row and in the material from row to row with respect to the inside width of the holes can be varied so that the desired total resistance of the electrical heating element is achieved with given dimensions of the filter, and also a required dimension of the passage area of the exhaust gas can be taken into account.
  • connection elements 3 which are connected to the perforated plate in an electrically conductive manner.
  • the connection elements extend in connection directions (arrows) 5 and 6 along the cylinder circumference.
  • the perforated plate 2 also has elongated holes oriented in the circumferential direction, e.g. 7, which are arranged in parallel rows 8-11, the illustration in the drawing being incomplete.
  • the entire perforated plate between the connections 3 and 4 is provided with such elongated holes.
  • the rows of elongated holes are also oriented in the main opening direction, one of which is designated by 12 (arrow). It is essential that the main opening direction, the direction of the rows of holes and the connection directions of the connection elements 4 and 5 run parallel to one another. It is also important for the desired current profile that the elongated holes of the successive rows of holes are offset from one another in the circumferential direction, as can be seen from the illustration of the rows of holes 8-11.
  • Current paths 13, 14 then appear, which are indicated by broken lines. The current paths run approximately sinusoidally and are particularly long compared to the extent of the heating element 1 in the axial direction.
  • FIG. 1 shows sizes for a preferred dimensioning of the rows of elongated holes in the perforated plate, although the perforated plate shown is not designed according to the preferred dimensioning.
  • a dimensioning is preferred that webs, for example web 15, between two openings arranged in a row have a length a which is approximately twice as large as a width b2 of the material of the heating element between two successive rows of holes, here rows of holes 9 and 10.
  • the paths of the current paths for example 13, 14, have approximately the same electrical resistance everywhere, so that a uniform development of Joule heat occurs when a voltage is applied to the connections 3 and 4 .
  • the length 1 of the elongated holes also goes into the dimensioning of the heating element with regard to its total resistance given the external dimensions of the heating element. The latter also influences the passage area of the filter, not shown in the rest, of which the heating element is a part, for exhaust gases flowing through.
  • the thickness of the perforated plate is not shown, but it is relatively large because of the large specific surface resistance of the perforated plate, which ensures a long service life.
  • the heating element is generally designated 16. It consists of a perforated plate 17 shaped as an open cylinder, which is therefore not closed in the region of a recess 18. Parallel to the recess in connection directions 19, 20, the heating element has long connection elements 21, 22 which are parallel to one another.
  • the elongated holes, e.g. 24, are arranged offset in rows parallel to one another, the rows extending in the main opening direction being designated by 25, 26. The further rows of elongated holes are not shown in FIG. 2.
  • webs which are not designated here, can also exist between elongated holes in a row with respect to a width of the material which lies between two adjacent ones Row of holes stands, be dimensioned so that the same electrical resistances are set along current paths not shown here.
  • the current paths are long compared to the circumference of the non-closed cylinder, which is formed by the perforated plate 17.
  • FIGS. 3 and 4 show heating elements 27, 28 with diamond-shaped openings, here made of expanded metal 29, 30. Openings, e.g. 31, 32 of the expanded metal are arranged offset in adjacent rows, in such a way that main opening directions 33, 34 in turn run parallel to connection directions 35, 36 of strip-shaped connection elements 37, 38 and 39, 40, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Pipe Accessories (AREA)
  • Surface Heating Bodies (AREA)
  • Chimneys And Flues (AREA)
  • Resistance Heating (AREA)
EP92101593A 1991-11-22 1992-01-31 Elément chauffant électrique pour un filtre à suie Withdrawn EP0543075A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914138426 DE4138426A1 (de) 1991-11-22 1991-11-22 Elektrisches heizelement eines russfilters
DE4138426 1991-11-22

Publications (1)

Publication Number Publication Date
EP0543075A1 true EP0543075A1 (fr) 1993-05-26

Family

ID=6445350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101593A Withdrawn EP0543075A1 (fr) 1991-11-22 1992-01-31 Elément chauffant électrique pour un filtre à suie

Country Status (3)

Country Link
EP (1) EP0543075A1 (fr)
JP (1) JPH05296026A (fr)
DE (1) DE4138426A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637984A1 (fr) * 1992-04-20 1995-02-15 Donaldson Company, Inc. Cartouche filtrante pour dispositif purgeur
US5409669A (en) * 1993-01-25 1995-04-25 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
US5656048A (en) * 1994-04-06 1997-08-12 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
EP0838578A1 (fr) * 1996-10-22 1998-04-29 Sumitomo Electric Industries, Ltd. Piège à particules et élément chauffant
US8526801B2 (en) 2007-04-26 2013-09-03 Voss Automotive Gmbh Line connector for media lines
CN101606014B (zh) * 2007-04-26 2013-12-11 福士汽车配套部件责任有限公司 用于介质导管的导管连接器
ES2524013R1 (es) * 2013-01-19 2015-03-03 Technokontrol Cat Global Sl Cuerpo de las aleaciones en formato laminar u otros, supresores de todo tipo de vaporizaciones y emisiones.
ES2543225A1 (es) * 2014-02-17 2015-08-17 Technokontrol-Cat Global, Sl Sistema de filtro supresor de partículas contaminantes y no contaminantes, en o sin suspensión atmosférica, gaseosa o líquida
US9651185B2 (en) 2008-03-19 2017-05-16 Voss Automotive Gmbh Line connector for media lines
WO2017212079A1 (fr) * 2016-06-07 2017-12-14 Technokontrol Global, Ltd Corps d'alliages sous forme lamellaire ou analogues, suppresseurs de tout type de vaporisations et d'émissions
DE102021207621A1 (de) 2021-07-16 2023-01-19 centrotherm international AG Heizelement

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224172C2 (de) * 1992-07-22 1997-11-20 Bernhard Nibbrig Gasreinigungsvorrichtung
WO2016123738A1 (fr) * 2015-02-02 2016-08-11 深圳麦克韦尔股份有限公司 Appareil de chauffage de cigarette et ensemble de chauffage associé
CN104720109B (zh) * 2015-02-02 2018-07-20 深圳麦克韦尔股份有限公司 卷烟加热器及其加热组件
CN106108117B (zh) * 2016-08-09 2019-04-05 朱晓春 一种电子烟
CA3021841C (fr) * 2017-10-27 2021-03-16 Shenzhen First Union Technology Co., Ltd. Vaporisateur de cuisson basse temperature et ensemble de fumoir four basse temperature
WO2023286194A1 (fr) * 2021-07-14 2023-01-19 日本たばこ産業株式会社 Inhalateur d'arôme et procédé de fabrication d'un dispositif chauffant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1216381A (fr) * 1957-11-18 1960-04-25 Fabrication de dispositifs électriques chauffants et conducteurs
US3099540A (en) * 1958-01-07 1963-07-30 Eisler Paul Electric foil resistance drier
FR2517163A1 (fr) * 1981-11-23 1983-05-27 Metal Deploye Resistance electrique en tole raidie
EP0275372A1 (fr) * 1987-01-17 1988-07-27 Kanthal GmbH Filtre à suie pour moteur diesel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1216381A (fr) * 1957-11-18 1960-04-25 Fabrication de dispositifs électriques chauffants et conducteurs
US3099540A (en) * 1958-01-07 1963-07-30 Eisler Paul Electric foil resistance drier
FR2517163A1 (fr) * 1981-11-23 1983-05-27 Metal Deploye Resistance electrique en tole raidie
EP0275372A1 (fr) * 1987-01-17 1988-07-27 Kanthal GmbH Filtre à suie pour moteur diesel

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637984A1 (fr) * 1992-04-20 1995-02-15 Donaldson Company, Inc. Cartouche filtrante pour dispositif purgeur
EP0637984A4 (fr) * 1992-04-20 1995-07-19 Donaldson Co Inc Cartouche filtrante pour dispositif purgeur.
US5409669A (en) * 1993-01-25 1995-04-25 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
US5656048A (en) * 1994-04-06 1997-08-12 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
EP0838578A1 (fr) * 1996-10-22 1998-04-29 Sumitomo Electric Industries, Ltd. Piège à particules et élément chauffant
US5958095A (en) * 1996-10-22 1999-09-28 Sumitomo Electric Industries, Ltd. Regenerative heater of diesel engine particulate trap and diesel engine particulate trap using the same heater
US8526801B2 (en) 2007-04-26 2013-09-03 Voss Automotive Gmbh Line connector for media lines
CN101606014B (zh) * 2007-04-26 2013-12-11 福士汽车配套部件责任有限公司 用于介质导管的导管连接器
CN103644421A (zh) * 2007-04-26 2014-03-19 福士汽车配套部件责任有限公司 用于介质导管的导管连接器
US9429259B2 (en) 2007-04-26 2016-08-30 Voss Automotive Gmbh Line connector for media lines
US9651185B2 (en) 2008-03-19 2017-05-16 Voss Automotive Gmbh Line connector for media lines
ES2524013R1 (es) * 2013-01-19 2015-03-03 Technokontrol Cat Global Sl Cuerpo de las aleaciones en formato laminar u otros, supresores de todo tipo de vaporizaciones y emisiones.
ES2543225A1 (es) * 2014-02-17 2015-08-17 Technokontrol-Cat Global, Sl Sistema de filtro supresor de partículas contaminantes y no contaminantes, en o sin suspensión atmosférica, gaseosa o líquida
WO2017212079A1 (fr) * 2016-06-07 2017-12-14 Technokontrol Global, Ltd Corps d'alliages sous forme lamellaire ou analogues, suppresseurs de tout type de vaporisations et d'émissions
DE102021207621A1 (de) 2021-07-16 2023-01-19 centrotherm international AG Heizelement

Also Published As

Publication number Publication date
DE4138426A1 (de) 1993-05-27
JPH05296026A (ja) 1993-11-09

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