DE4410484A1 - Heating device - Google Patents

Heating device

Info

Publication number
DE4410484A1
DE4410484A1 DE4410484A DE4410484A DE4410484A1 DE 4410484 A1 DE4410484 A1 DE 4410484A1 DE 4410484 A DE4410484 A DE 4410484A DE 4410484 A DE4410484 A DE 4410484A DE 4410484 A1 DE4410484 A1 DE 4410484A1
Authority
DE
Germany
Prior art keywords
heating device
protective tube
heating
gas
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.)
Withdrawn
Application number
DE4410484A
Other languages
German (de)
Inventor
Friedrich Schwing
Kurt Dr Jogun
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Priority to DE4410484A priority Critical patent/DE4410484A1/en
Publication of DE4410484A1 publication Critical patent/DE4410484A1/en
Withdrawn legal-status Critical Current

Links

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—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • 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
    • H05B3/0033—Heating devices using lamps
    • H05B3/0038—Heating devices using lamps for industrial applications
    • H05B3/0052—Heating devices using lamps for industrial applications for fluid treatments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

The invention relates to a heating device when used in a chemically active atmosphere, the heating device comprising an electrical heating wire, arranged in a protective tube and made from a high-melting material, and the protective tube consisting of a ceramic or metallic material, can be closed in a hermetically tight manner and having passage openings for the electrical connection of the heating wire. In order to form a generic heating device in such a manner that, in comparison to the generic prior art, a considerably improved fatigue durability (endurance) can be achieved, it is proposed according to the invention for a filling of a gas mixture of noble gas and halide gas (halogen gas) to be present in the protective tube and for the high-melting heating wire to be constantly evaporated and renewed, during operation of the heating device, by means of a circular process with the gas mixture.

Description

Die Erfindung bezieht sich auf eine Heizeinrichtung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a heating device according to the Preamble of claim 1.

Aus der DE 40 14 246 A1 ist eine Heizeinrichtung mit in einem Schutzrohr angeordneten Heizdraht aus Wolfram oder Molybdän be­ kannt, wobei das Schutzrohr aus keramischem Material besteht, hermetisch dicht verschließbar ist und Durchführungen zum elek­ trischen Anschluß des Heizdrahtes aufweist. Zur Vermeidung der Oxidation des Heizdrahtes ist das Schutzrohr mit Inertgas (z. B. Stickstoff, Argon) gefüllt.DE 40 14 246 A1 describes a heating device in one Protective tube arranged heating wire made of tungsten or molybdenum be knows, the protective tube consists of ceramic material, is hermetically sealed and bushings for elec has trical connection of the heating wire. To avoid the Oxidation of the heating wire is the protective tube with inert gas (e.g. Nitrogen, argon).

Zum allgemeinen Hintergrund wird noch auf die Druckschriften DE 14 76 485 A, US-PS 4 103 277 und US-PS 5 195 165 verwiesen.The general background is still on the publications DE 14 76 485 A, US-PS 4 103 277 and US-PS 5 195 165 referenced.

Der Erfindung liegt die Aufgabe zugrunde, eine Heizeinrichtung so auszubilden, daß diese im Vergleich zum gattungsgemäßen Stand der Technik eine wesentlich bessere Dauerhaltbarkeit aufweist.The invention has for its object a heating device to be trained so that this compared to the generic state the technology has a much better durability.

Die Aufgabe ist erfindungsgemäß durch die kennzeichnenden Merk­ male des Patentanspruchs 1 gelöst.The object is according to the invention by the characterizing note male of claim 1 solved.

Ein Vorteil der erfindungsgemäßen Heizeinrichtung liegt darin, daß sie nach dem Prinzip einer Halogenlampe arbeitet, also das Schutzrohr mit einem Edelgas/Halogenid-Gasgemisch gefüllt ist und ein hochschmelzender Heizdraht verwendet wird, der im Be­ trieb des Heizelements durch einen Kreisprozeß mit dem Gasge­ misch ständig verdampft und erneuert wird, wodurch die Lebens­ dauer der Heizeinrichtung im Vergleich zu bekannten Heizeinrich­ tungen wesentlich erhöht wird. An advantage of the heating device according to the invention is that that it works on the principle of a halogen lamp, that is Protective tube is filled with a noble gas / halide gas mixture and a high-melting heating wire is used, which in Be driven the heating element through a cycle with the gas mix is constantly evaporated and renewed, making life duration of the heating device compared to known heating device tion is significantly increased.  

Weitere Vorteile und Ausgestaltungen der Erfindung gehen aus den übrigen Unteransprüchen und der Beschreibung hervor.Further advantages and refinements of the invention result from the other subclaims and the description.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbei­ spieles näher erläutert. Sie zeigt eine schematisch dargestellte Abgasnachbehandlungseinrichtung 1 mit einem Hauptkatalysator 2 und einem Startkatalysator 3, die in einer Abgasleitung 4 einer nicht dargestellten Brennkraftmaschine in prinzipiell bekannter Weise angeordnet ist. Im Wabenkörper 5 des Startkatalysators 3 sind, zwecks dessen schneller Aufheizung, erfindungsgemäße Heiz­ einrichtungen 6 und 7 angeordnet, die zur Verbesserung der Wär­ meübertragung in direktem Kontakt mit dem Katalysator-Wabenkör­ per 5 stehen. Jede der Heizeinrichtungen 6 und 7 umfaßt ein Schutzrohr 8 aus keramischem oder metallischem Material, in dem ein elektrischer Heizdraht 9 aus hochschmelzendem Wolfram ange­ ordnet ist. Wegen der chemisch aktiven Atmosphäre im Startkata­ lysator 5 ist das Schutzrohr 8 hermetisch dicht gegen seine Um­ gebung verschließbar. Des weiteren umfaßt das Schutzrohr 8 Durchführungen 10 und 11 zum elektrischen Anschluß des Heizdrah­ tes 9. Zudem befindet sich im Schutzrohr 8 eine unter Überdruck stehende Gasfüllung aus einem Edelgas/Halogenid-Gasgemisch, wo­ bei der Heizdraht 9 im Betrieb der Heizeinrichtungen 6, 7 durch einen Kreisprozeß mit dem Edelgas/Halogenid-Gasgemisch ständig verdampft und erneuert wird. Somit arbeitet jede der Heizein­ richtungen 6, 7 nach dem Prinzip einer Halogenlampe, jedoch mit dem Unterschied, daß wegen der bei hohen Temperaturen und che­ misch aktiver Atmosphäre (hier Abgas) bei Quarzglas auftretenden Entglasung anstelle einer Quarzglasbirne das Keramik-Schutzrohr 8 verwendet wird.In the drawing, the invention is explained in more detail based on a game Ausführungsbei. It shows a schematically illustrated exhaust gas aftertreatment device 1 with a main catalytic converter 2 and a starting catalytic converter 3 , which is arranged in an exhaust pipe 4 of an internal combustion engine (not shown) in a manner known in principle. In the honeycomb body 5 of the starting catalytic converter 3 , for the sake of its faster heating, heating devices 6 and 7 according to the invention are arranged which are in direct contact with the catalyst honeycomb body 5 to improve the heat transfer. Each of the heating devices 6 and 7 comprises a protective tube 8 made of ceramic or metallic material, in which an electric heating wire 9 made of high-melting tungsten is arranged. Because of the chemically active atmosphere in the start catalyst 5 , the protective tube 8 is hermetically sealed against its environment. Furthermore, the protective tube 8 bushings 10 and 11 for electrical connection of the Heizdrah tes 9th In addition, there is a pressurized gas filling made of a noble gas / halide gas mixture in the protective tube 8 , where the heating wire 9 in the operation of the heating devices 6 , 7 is continuously evaporated and renewed by a circular process with the noble gas / halide gas mixture. Thus each of the Heizein devices 6 , 7 works on the principle of a halogen lamp, but with the difference that the ceramic protective tube 8 is used instead of a quartz glass bulb because of the devitrification occurring in quartz glass at high temperatures and chemically active atmosphere (here exhaust gas).

In einer weiteren Ausführung der Erfindung ist in dem Schutzrohr 8 eine gegenüber dessen Umgebung hermetisch abgeschlossene Halo­ genlampe angeordnet. Des weiteren ist die erfindungsgemäße Heiz­ einrichtung auch in Rußabbrennfiltern oder Unterboden-Katalysa­ toren einsetzbar und selbstverständlich ist die Anordnung der einzelnen Heizeinrichtungen in der Abgasnachbehandlungseinrich­ tung beliebig variierbar.In a further embodiment of the invention, a halo lamp which is hermetically sealed from its surroundings is arranged in the protective tube 8 . Furthermore, the heating device according to the invention can also be used in soot burn-off filters or underbody catalysts and of course the arrangement of the individual heating devices in the exhaust gas aftertreatment device can be varied as desired.

Claims (4)

1. Heizeinrichtung zur Anwendung in chemisch aktiver Atmosphäre, wobei die Heizeinrichtung einen in einem Schutzrohr angeordneten elektrischen Heizdraht aus hochschmelzendem Material umfaßt und wobei das Schutzrohr aus keramischem oder metallischem Material besteht, hermetisch dicht verschließbar ist und Durchführungen zum elektrischen Anschluß des Heizdrahtes aufweist, dadurch gekennzeichnet, daß sich in dem Schutzrohr (8) eine Gasfüllung aus einem Edel­ gas/Halogenid-Gasgemisch befindet und der hochschmelzende Heiz­ draht (9) im Betrieb der Heizeinrichtung (6, 7) durch einen Kreisprozeß mit dem Gasgemisch ständig verdampft und erneuert wird.1. Heating device for use in a chemically active atmosphere, wherein the heating device comprises an electrical heating wire arranged in a protective tube made of high-melting material and wherein the protective tube consists of ceramic or metallic material, is hermetically sealed and has bushings for electrical connection of the heating wire, characterized that a gas filling of an inert gas / is halide gas mixture in the protective tube (8) and the refractory heating wire (9) during operation of the heating device (6, 7) is constantly evaporated by a cyclic process with the gas mixture and renewed. 2. Heizeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in dem Schutzrohr (8) eine Halogenlampe angeordnet ist, die gegenüber der Umgebung des Schutzrohres hermetisch dicht ver­ schlossen ist.2. Heating device according to claim 1, characterized in that in the protective tube ( 8 ) a halogen lamp is arranged, which is hermetically sealed ver from the surroundings of the protective tube. 3. Heizeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Heizeinrichtung in einer Abgasnachbehandlungseinrichtung (1, 3, 4) einer Brennkraftmaschine angeordnet ist.3. Heating device according to claim 1 or 2, characterized in that the heating device is arranged in an exhaust gas aftertreatment device ( 1 , 3 , 4 ) of an internal combustion engine. 4. Heizeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Schutzrohr (8) zur Verbesserung der Wärmeübertragung in direktem Kontakt mit einem Katalysator-Wabenkörper (5) steht.4. Heating device according to claim 3, characterized in that the protective tube ( 8 ) for improving the heat transfer is in direct contact with a catalyst honeycomb body ( 5 ).
DE4410484A 1994-03-25 1994-03-25 Heating device Withdrawn DE4410484A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4410484A DE4410484A1 (en) 1994-03-25 1994-03-25 Heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4410484A DE4410484A1 (en) 1994-03-25 1994-03-25 Heating device

Publications (1)

Publication Number Publication Date
DE4410484A1 true DE4410484A1 (en) 1995-05-04

Family

ID=6513898

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4410484A Withdrawn DE4410484A1 (en) 1994-03-25 1994-03-25 Heating device

Country Status (1)

Country Link
DE (1) DE4410484A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602287A1 (en) * 1995-02-02 1996-08-08 Nissan Motor Low cost, less complex, exhaust gas catalyst with rapid electrical heating
DE19959303A1 (en) * 1999-12-09 2001-06-21 Bosch Gmbh Robert Device for exhaust gas treatment of an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1476485A1 (en) * 1965-07-10 1969-08-14 Heinz Berger Device for the catalytic oxidation of exhaust gases from internal combustion engines
US4103277A (en) * 1976-12-17 1978-07-25 Gte Sylvania Incorporated Ceramic enveloped electrical heating element
DE8802042U1 (en) * 1988-02-17 1988-04-07 Blv Licht- Und Vakuumtechnik Gmbh, 8019 Steinhoering, De
US5195165A (en) * 1989-05-18 1993-03-16 Matsushita Electric Industrial Co., Ltd. Quartz tube heat generator with catalytic coating

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1476485A1 (en) * 1965-07-10 1969-08-14 Heinz Berger Device for the catalytic oxidation of exhaust gases from internal combustion engines
US4103277A (en) * 1976-12-17 1978-07-25 Gte Sylvania Incorporated Ceramic enveloped electrical heating element
DE8802042U1 (en) * 1988-02-17 1988-04-07 Blv Licht- Und Vakuumtechnik Gmbh, 8019 Steinhoering, De
US5195165A (en) * 1989-05-18 1993-03-16 Matsushita Electric Industrial Co., Ltd. Quartz tube heat generator with catalytic coating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602287A1 (en) * 1995-02-02 1996-08-08 Nissan Motor Low cost, less complex, exhaust gas catalyst with rapid electrical heating
DE19602287C2 (en) * 1995-02-02 2000-05-18 Nissan Motor Catalytic converter for internal combustion engines
DE19959303A1 (en) * 1999-12-09 2001-06-21 Bosch Gmbh Robert Device for exhaust gas treatment of an internal combustion engine

Similar Documents

Publication Publication Date Title
EP1967712B1 (en) Electrically heated honeycomb and method for its operation
EP0783621B1 (en) Electrically heatable catalyser
EP0605479B1 (en) Exhaust gas catalytic converter
EP1814362A1 (en) Heating element for a hot air device
EP0395840A1 (en) Exhaust gas purifying soot filter for an internal combustion engine
EP0774055B1 (en) Catalytic converter
DE2321709C3 (en) Electric spotlights, in particular for use as vehicle headlights, and method for their production
DE69920995T2 (en) Heating device for an exhaust gas purification catalyst
DE4410484A1 (en) Heating device
DE2732060C2 (en) Electric fluorescent lamp
EP0456907B1 (en) High-pressure discharge lamp
EP0718869A1 (en) Low pressure discharge lamp
EP0279249B1 (en) High-pressure discharge lamp
DE102019209298A1 (en) Ring catalyst with heating element
DD147391A5 (en) ELECTRIC GLUE CANDLE FOR INTERNAL COMBUSTION ENGINES
WO2020260337A1 (en) Exhaust gas aftertreatment device
DE2705488A1 (en) CONTROLLED ELECTRIC HIGH VOLTAGE SWITCHING DEVICE
DE202008013657U1 (en) electrode assembly
EP0555755B1 (en) High pressure discharge lamp
DE327634C (en) Electric vibration tubes
DE102018101771B3 (en) Apparatus for exhaust aftertreatment of an internal combustion engine and method for heating an exhaust aftertreatment component
DE1213669B (en) Glow plug with an electrical resistance heating element made of silicon carbide
DE633186C (en) Directly heated glow cathode for gas-filled discharge vessels
DE175128C (en)
DE842952C (en) Inert gas furnace with ceramic heating elements

Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal