EP0638776B1 - Anordnung zur Verringerung der Geruchs - und Schadstoffemission bei Heizgeräten für Fahrzeuge - Google Patents
Anordnung zur Verringerung der Geruchs - und Schadstoffemission bei Heizgeräten für Fahrzeuge Download PDFInfo
- Publication number
- EP0638776B1 EP0638776B1 EP94110636A EP94110636A EP0638776B1 EP 0638776 B1 EP0638776 B1 EP 0638776B1 EP 94110636 A EP94110636 A EP 94110636A EP 94110636 A EP94110636 A EP 94110636A EP 0638776 B1 EP0638776 B1 EP 0638776B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- exhaust
- flame tube
- catalytically active
- exhaust gas
- 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 - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
- F24H1/0045—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel with catalytic combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
Definitions
- the invention relates to an arrangement for reducing the Odor and pollutant emissions with catalytically effective Exhaust gas flow section during operation of a liquid fuel operated engine independent heater for vehicles with combustion chamber and subordinate Flame tube and concentric with the combustion chamber and the flame tube arranged heat exchanger, in which the exhaust gas after the Outlet deflected from the flame tube and through the heat exchanger is led to the exhaust outlet.
- Heaters are known for heating the vehicle interior and for defrosting windows, for driving safety and to improve driving comfort just in time until the Engine of the vehicle has sufficient heat to heat the Gives up vehicle interior and during the time in which the Engine of the vehicle does not generate sufficient heat, e.g. at extremely low outside temperatures. Beyond that such heaters also used around the vehicle engine preheat so that it starts easier. Under vehicle not only cars, but also commercial vehicles and construction machinery and understood ships that have a propulsion engine and one intended for the stay of the operator Cabin or a cargo hold to be heated.
- This Heaters are of the type used for combustion for heating purposes used liquid fuel in "gasoline” and “Diesel devices” divided and each of the two types again after the heat transfer medium in "air” and “water devices”.
- a heater that uses air as a heat transfer medium shows DE 38 08 061 C2, one with a liquid Heat transfer medium working heater the DE 39 43 335 A1.
- Both with petrol and with with diesel fuel operated heaters Combustion after appropriate preparation in a Combustion chamber and a subsequent flame tube, and the hot ones Exhaust gases are passed along a heat exchanger (heating heat exchanger) led to heat transfer to the heat transfer medium.
- the exhaust gas then leaves the heater via an exhaust outlet connection and a generally short one Exhaust pipe. This is the way that the exhaust gas up to Leaving outside, very short compared to the Exhaust pipes of a vehicle engine with several silencers.
- a heater in which effective sound absorption through sound absorption inserts or conditions are caused inside the heater should.
- sound absorbing pads and / or inserts inside the combustion chamber in a flameless area arranged.
- These layers or inserts can be porous or perforated and from a catalytic effective material, with layers of sound-absorbing material and those made of catalytic material also distributed within the fire tubes of the flame tube should be arranged.
- this arrangement has the Disadvantage that the cleaning effect is very low and with increasing clogging of the pores by e.g. Soot particles the soundproofing deteriorates and that the Flow conditions in the combustion chamber, e.g. through openings in the combustion chamber inner lining, deteriorated become.
- the object of the invention is to provide a heater arrangement of the type mentioned, which is compact and with which with other simple measures nevertheless effective exhaust gas cleaning is achieved.
- the essence of the invention is that in a portion of the exhaust gas flow path between the combustion chamber / flame tube outer wall and the heat exchanger inner wall is a catalytically coated, metallic knitted fabric is arranged.
- Such knitted fabrics are known from exhaust gas purification technology and can easily that specified by the fins of the heat exchanger Contour to be adjusted. It has proven to be beneficial proven if the knitted fabrics are metallic and this version is adapted to the contour of the heat exchanger. This creates a ring-shaped element that is smooth on the inside is designed so that it is placed on the flame tube can be, while the outer contour of that of the heat exchanger and its ribs.
- This element can be according to a continuation with an elastic layer be so that between the metallic frame of the knitted fabric and the heat exchanger an elastic intermediate layer arises.
- an elastic layer be so that between the metallic frame of the knitted fabric and the heat exchanger an elastic intermediate layer arises.
- a continuation of the Invention consist of source material, so that with increasing Temperature an increasing, tighter fit of the element in the room offered to him.
- This element offers various options on. In the simplest case, a corresponding paragraph provided on the flame tube against which the element rests. The axial loading of this ring only takes place from one side, and through the ribbing is a radial Fixation given, so that a simple safeguard against axial displacement is sufficient.
- This arrangement of the Elementes also has the great advantage of being present with it Retrofitted heaters without any special effort can be and that this component at any time in a very simple Way can be replaced.
- Such a metallic one Knitted fabric is also suitable to be used with diesel fuel Retain soot particles occurring in heaters. A free burning of the element is at the given Temperatures in the heater can be achieved without additional effort.
- the catalytically active element can not only be a metal-knitted, but also a ceramic monolith be, as is customary in exhaust gas cleaning is used, or a metallic corrugated body, such as he in automotive engineering, e.g. for pre-catalysts, is used.
- a metallic corrugated body such as he in automotive engineering, e.g. for pre-catalysts.
- such an element must be a have sufficient length, otherwise the dwell time of the exhaust gas in the element as it flows through is too low. This is especially true if the item should also act as a soot filter.
- the ceramic body can a configuration can also be selected that is particularly suitable is to retain soot particles.
- Such Ceramic bodies have a variety of continuous Channels on the checkerboard side on the entrance or exit are closed, so that the exhaust gas in each case open channels then enters through the ceramic body passes through the adjacent channels and from there the exhaust gas treatment body leaves. That in the passage through soot particles deposited on this exhaust gas treatment body then at the given temperature conditions in the Remove the flame tube easily by burning it out.
- the heater shown in longitudinal section in Fig. 1 differs differs from that shown in cross section in FIG Heater only by the different guidance of the Heat transfer medium, the air in the example of FIG. 1 is and in the example of FIG. 2 is a liquid. thats why 1 on both sides with fins, Inner and outer ribs, provided, and the supply and discharge of the heat transfer medium takes place differently from each other.
- combustion chamber 1 has a combustion chamber 1 in which Fuel supplied via the spark plug socket 2, the via the combustion air supply nozzle 3 via a combustion air blower 4 sucked air gets mixed and thus an ignitable Mixture forms, which ignites by means of the ignition device 4 will be burned.
- a flame shield 6 Connects to the combustion chamber 1 a flame shield 6 and acting as a flame holder Flame tube 7 on.
- a blower motor 8 arranged with the hot air blower 9, over the air as a heat transfer medium from the air intake 10 sucked in and inside the housing 11 via the heat exchanger 12 is performed before the heater over the outlet port 13 leaves to directly or through a heating heat exchanger to heat up the vehicle cabin and defrost the windshield.
- the ignition of the ignitable Fuel / air mixture takes place in the embodiment in an antechamber 14.
- the combustion takes place in the combustion chamber 1 instead.
- the flame reaches into that Flame tube 7, and the hot exhaust gases leave the flame tube 7 and hit the curved wall of the heat exchanger 12 and are deflected there and flow into the annular space 15 the exhaust outlet 16 and leave the heater there.
- the temperature in the combustion chamber 1 is approximately 800 ° C and that at outlet 16 is about 200 to 300 ° C.
- the heat exchanger 12 has an outer rib 12.1 in the annular space 19 between the housing 11 and the heat exchanger wall 12 to guide the heat transfer medium air and around a Improvement of the heat transfer from the hot exhaust gas to reach the heat transfer medium. Furthermore, the Heat exchanger 12 inner fins 12.2, which in known Way also serve to improve heat transfer. These inner ribs 12.2 protrude into the annular space 15 the flame tube 7 and the wall of the heat exchanger 12. In the heater according to FIG. 2, the heat exchanger 12 no outer ribs, and the position of the nozzle 10, 12, 16 is different from the heater of FIG. 1, because in the case 2 is a liquid heat transfer medium is used. Both heaters are known and have been used even under extreme conditions proven.
- the combustion can be optimal can be set, but still - if anch in very small amounts - contain pollutant in the exhaust gas is.
- the odorants contained in the exhaust gas are disruptive, partly as aromatic hydrocarbons, partially appear as hydrogen sulfide.
- the arrangement offers itself to remove substances from the exhaust gas of catalysts, such as those used for exhaust gas purification liquid fuel powered engines is known.
- the arrangement of such catalysts in the exhaust pipe from Heaters require a relatively large installation space, which is not available under normal installation conditions.
- Element 21 in the annular space 15 between the flame tube 7 and the heat exchanger 12 can be arranged.
- This element is 21 formed as a ring, the outer contour 21.1 of the corresponds to the ribbed part of the heat exchanger 12, while the inner contour 21.2 corresponding to the flame tube 7 smooth is.
- the outer contour 21.1 and the inner contour 21.2 a casing for a catalytically coated Wire mesh 21.3.
- the inlet and the outlet in this Element 21 is through a corresponding perforated plate 21.4 or 21.5 in Fig.
- the element 21 can additionally with a thin Swell mat should be surrounded so that it increases with temperature and load more firmly in the contour of the annulus 15 fits and also secured against axial displacement is. Usually, however, this is not necessary because slightly in the direction of action behind the element 21 Stop can be arranged.
- a ceramic, catalytically coated monolith with a variety of Passages for the exhaust gas or one with a variety of Catalytic coated SiC block be used.
- This can be a catalytically active monolith or an SiC body with a corresponding coating.
- the bracket takes place in a known manner via a wire mesh or / and a swelling mat.
- the axial change in position can through a stop, a constriction or an inserted Ring take place in the flame tube 7, the axial position fixing in the flow direction behind the element 23 he follows.
- the element 21 as a soot filter in be known manner.
- Such soot filters exist from a catalytically effective coated body with parallel, continuous channels that and accordingly checkerboard-like on the outlet side are closed, so that the exhaust gas in the outlet side sealed channel and then through the Monoliths in the other channel open on the outlet side occurs, the soot particles in the passage through the body deposit.
- This element 21 is in the direction of flow behind the combustion chamber 1 and the flame tube 7 in the area arranged after the flow deflection of the exhaust gas. Temperatures still prevail there, which means that the Allow element 21 of the accumulated soot particles.
- the element 21 can also be formed from SiC be.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Air-Conditioning For Vehicles (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Incineration Of Waste (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Description
- Fig. 1
- einen Längsschnitt durch ein Heizgerät mit Luft als Wärmeübertragungsmedium;
- Fig. 2
- einen Querschnitt durch den brennerseitigen Teil eines Heizgerätes mit einem flüssigen Wärmeübertragungsmittel bei sonst gleichem Aufbau wie das Heizgerät nach Fig. 1.
Claims (6)
- Anordnung zur Verringerung der Geruchs- und Schadstoffemission mit katalytisch wirksamem Abgasdurchströmungsabschnitt bei einem Betrieb eines mit flüssigem Brennstoff betriebenen motorunabhängigen Heizgerätes für Fahrzeuge, mit Brennkammer (1) und nachgeordnetem Flammrohr (7) sowie konzentrisch zur Brennkammer und zum Flammrohr angeordnetem Wärmetauscher (12), bei dem das Abgas nach dem Austritt aus dem Flammrohr (7) umgelenkt und durch den Wärmetauscher (12) zum Abgasauslaßstutzen (16) geführt wird,
dadurch gekennzeichnet,
daß in einem Abschnitt des Abgasströmungsweges zwischen der Brennkammer-/Flammrohr-Außenwand und der Wärmetauscher-Innenwand ein katalytisch beschichtetes, metallisches Gestrick (21.3) angeordnet ist. - Anordnung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Gestrick (21.3) metallisch gefaßt und der Kontur (21.2) des Wärmetauschers (12) angepaßt ist. - Anordnung nach Anspruch 2,
dadurch gekennzeichnet,
daß zwischen der metallischen Fassung des Gestrickes (21.3) und dem Wärmetauscher (12) eine elastische Zwischenschicht angeordnet ist. - Anordnung nach Anspruch 3,
dadurch gekennzeichnet,
daß die Zwischenschicht aus Quellmattenmaterial besteht. - Anordnung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß im katalytisch wirksamen Abschnitt des Abgasströmungsweges ein keramischer Monolith vorgesehen ist. - Anordnung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß im katalytisch wirksamen Abschnitt des Abgasströmungsweges ein SiC-Körper mit entsprechender Beschichtung vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4327139 | 1993-08-12 | ||
DE4327139A DE4327139A1 (de) | 1993-08-12 | 1993-08-12 | Verfahren zur Verringerung der Geruchs- und Schadstoffemissionen bei Heizgeräten für Fahrzeuge und Anordnung zur Durchführung des Verfahrens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0638776A1 EP0638776A1 (de) | 1995-02-15 |
EP0638776B1 true EP0638776B1 (de) | 1999-12-29 |
Family
ID=6495055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94110636A Expired - Lifetime EP0638776B1 (de) | 1993-08-12 | 1994-07-08 | Anordnung zur Verringerung der Geruchs - und Schadstoffemission bei Heizgeräten für Fahrzeuge |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0638776B1 (de) |
AT (1) | ATE188288T1 (de) |
DE (2) | DE4327139A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10143462A1 (de) * | 2001-09-05 | 2003-07-03 | Webasto Thermosysteme Gmbh | Zusatzheizgerätanordnung mit einem Schalldämpfer |
DE102016117408B4 (de) * | 2016-09-15 | 2020-11-26 | Eberspächer Climate Control Systems GmbH | Brennkammerbaugruppe für ein brennstoffbetriebenes Fahrzeugheizgerät |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19606135C2 (de) * | 1996-02-20 | 1999-01-14 | Erc Emissions Reduzierungs Con | Katalysatoranordnung, insbesondere für einen Dreizugkessel |
DE10004508A1 (de) * | 2000-02-02 | 2001-08-09 | Eberspaecher J Gmbh & Co | Brennkammeranordnung, insbesondere für ein Heizgerät |
DE10156962A1 (de) * | 2001-11-20 | 2003-06-26 | Eberspaecher J Gmbh & Co | Heizgerät, insbesondere Standheizung und/oder Zuheizer eines Kraftfahrzeugs |
DE10200962A1 (de) * | 2002-01-12 | 2003-07-31 | Eberspaecher J Gmbh & Co | Heizgerät und Gehäuse für ein Heizgerät |
DE102008002956A1 (de) * | 2008-07-22 | 2010-02-04 | Webasto Ag | Mobiles Heizgerät |
DE102017100430A1 (de) * | 2017-01-11 | 2018-07-12 | Eberspächer Climate Control Systems GmbH & Co. KG | Brennkammerbaugruppe |
CN108534135B (zh) * | 2018-06-08 | 2024-06-04 | 中山劲牛科技有限公司 | 封堵头 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3425259C2 (de) * | 1984-07-10 | 1986-10-23 | Wolfgang 5063 Overath Schmitter | Wärmeerzeuger |
DE3713476A1 (de) * | 1987-04-22 | 1988-11-10 | Webasto Ag Fahrzeugtechnik | Heizgeraet, insbesondere fahrzeugzusatzheizgeraet |
DE3808061A1 (de) * | 1988-03-11 | 1989-09-21 | Eberspaecher J | Anordnung zur absenkung der abgastemperatur bei heizeinrichtungen |
DE3838507A1 (de) * | 1988-11-12 | 1990-05-17 | Ernst Roehner | Kombi-heizungskessel |
DE3905775A1 (de) * | 1989-02-24 | 1990-08-30 | Kat Tec Ges Fuer Katalysatorte | Verfahren und vorrichtung zur reduzierung von schadstoffen eines verbrennungsverfahrens mit oxidations-wabenkatalysatoren und katalysatoren mit entschwefelungseigenschaften und abgasrueckfuehrung |
DE3943335A1 (de) * | 1989-12-29 | 1991-07-04 | Eberspaecher J | Fahrzeugheizung |
-
1993
- 1993-08-12 DE DE4327139A patent/DE4327139A1/de not_active Ceased
-
1994
- 1994-07-08 EP EP94110636A patent/EP0638776B1/de not_active Expired - Lifetime
- 1994-07-08 DE DE59409031T patent/DE59409031D1/de not_active Expired - Fee Related
- 1994-07-08 AT AT94110636T patent/ATE188288T1/de not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10143462A1 (de) * | 2001-09-05 | 2003-07-03 | Webasto Thermosysteme Gmbh | Zusatzheizgerätanordnung mit einem Schalldämpfer |
US7011179B2 (en) | 2001-09-05 | 2006-03-14 | Webasto Thermosysteme Internatonal Gmbh | Auxiliary heater arrangement with a muffler |
DE102016117408B4 (de) * | 2016-09-15 | 2020-11-26 | Eberspächer Climate Control Systems GmbH | Brennkammerbaugruppe für ein brennstoffbetriebenes Fahrzeugheizgerät |
Also Published As
Publication number | Publication date |
---|---|
ATE188288T1 (de) | 2000-01-15 |
DE59409031D1 (de) | 2000-02-03 |
EP0638776A1 (de) | 1995-02-15 |
DE4327139A1 (de) | 1995-02-16 |
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