EP1327820A1 - Active sound damper for exhaust gas systems - Google Patents

Active sound damper for exhaust gas systems Download PDF

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Publication number
EP1327820A1
EP1327820A1 EP20020021003 EP02021003A EP1327820A1 EP 1327820 A1 EP1327820 A1 EP 1327820A1 EP 20020021003 EP20020021003 EP 20020021003 EP 02021003 A EP02021003 A EP 02021003A EP 1327820 A1 EP1327820 A1 EP 1327820A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
flame tube
outlet opening
characterized
combustion
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
Application number
EP20020021003
Other languages
German (de)
French (fr)
Other versions
EP1327820A8 (en
EP1327820B1 (en
Inventor
Patric Schlecht
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
Eberspaecher Climate Control Systems GmbH and Co KG
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
Family has litigation
Priority to DE2002100524 priority Critical patent/DE10200524C5/en
Priority to DE10200524 priority
Application filed by Eberspaecher Climate Control Systems GmbH and Co KG filed Critical Eberspaecher Climate Control Systems GmbH and Co KG
Publication of EP1327820A1 publication Critical patent/EP1327820A1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7711729&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1327820(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Publication of EP1327820A8 publication Critical patent/EP1327820A8/en
Publication of EP1327820B1 publication Critical patent/EP1327820B1/en
Application granted granted Critical
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D11/00Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36Details, e.g. burner cooling means, noise reduction means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D3/00Burners using capillary action
    • F23D3/40Burners using capillary action the capillary action taking place in one or more rigid porous bodies
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2900/00Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00016Preventing or reducing deposit build-up on burner parts, e.g. from carbon

Abstract

The combustion chamber assembly (12) has a housing in which is a combustion chamber (16) defined by a wall (14). The combustion chamber has an outlet opening (24) for the combustion exhaust gases to a flame pipe (26). The burner has a steering control to feed some of the exhaust gases along at least a part of the exterior face (44) of the combustion chamber wall in front of the flame tube inlet.

Description

The present invention relates to a combustor assembly, in particular for a vehicle heater, comprising a combustion chamber housing, in which through a combustion chamber outer wall a combustion chamber is limited, the combustion chamber having a combustion chamber outlet opening has to exit exhaust gases generated during combustion to a Flame tube.

Such a combustion chamber assembly, as they are used in general used in vehicle heaters or auxiliary heaters Heaters is shown in FIG. 1. This from the prior art Known assembly 10s includes a combustor housing 12s that with an approximately cylindrical outer wall 14s Combustion chamber 16s limited radially outwards. From a floor area 18s of the combustion chamber housing 12s extends coaxially to the outer wall 14s and with respect to a longitudinal axis A of the combustion chamber assembly 10s an approximately cylindrical inner wall 20s, which by a Termination area 22s is axially completed. The outer wall 14s and the inner wall 20s thus approximately define a combustion chamber 16s ring-like shape in the area of a corresponding ring-shaped Exit opening 24s axially towards the combustion chamber housing 12s subsequent flame tube 26s is open. In the inner wall Several air inlet openings 28s are provided through 20s which passes the combustion air required for combustion into the Combustion chamber 16s also under the promotional effect of a not shown Blower can get.

On an inner side 30s of the outer wall facing the combustion chamber 14s is one made, for example, of nonwoven material or other porous material Material formed liner 32s provided. Also on the inner wall 20s can be on the side facing the combustion chamber 16s Page 34s is a lining 36s formed from knitted metal for sound insulation reasons be provided. Via a fuel supply line 39s the fuel is introduced into the combustion chamber 16s, for example can be done by an atomizer nozzle, not shown, or also by introduction, for example, into the lining 30s using an evaporation effect. Also protrudes into the combustion chamber 16s an igniter, not shown, for example a glow plug, which at the beginning of an operating phase ensures that the by atomization or evaporation ignited fuel entered the combustion chamber 16s and thus the combustion begins. The burning in the Combustion chamber 16s produced exhaust gases or the combustion flame emerge from the combustion chamber housing in the region of the outlet opening 24s 12s and flow through a central one, as indicated by arrows Opening 38s in the flame tube 26s of the outlet opening 24s of the combustion chamber housing 12s opposite exhaust gas aperture 40s therethrough. Those then flowing along the flame tube 26s by combustion generated very hot exhaust gases occur in the area of a flame tube outlet opening 42s out of the flame tube and become, as by arrows also shown, by a flame tube surrounding the outside, in the Figure not shown deflected heat exchanger housing, so that it flow back the outside of the flame tube 26s and thereby the heat exchanger housing and the medium flowing in the heat exchanger housing heat. The exhaust gases that cool down flow back in the direction Combustion chamber housing 12s and then occur after they may have been along a Part of the outside facing away from the combustion chamber 16s 44s of the outer wall 14s are flown, via an exhaust pipe system to the surroundings.

A problem with such combustion chamber assemblies or those that identify them Heaters is a comparatively strong one in the axial direction There is a temperature gradient. The temperature in the area of the flame tube is comparatively high, while the temperature in the range of Combustion chamber housing is comparatively small. Even the one on the outside of the flue gas, if any, returned exhaust gases are already ready cooled that they cause substantial heating of the combustion chamber housing can no longer contribute. This results in coking problems in the area of the linings 32s, 36s, the combustion air inlet openings 28s and the ignition device, not shown. In particular is exploited when introducing the fuel over porous materials fuel evaporation, especially at very low outside temperatures the start phase, i.e. the phase until the required Rated power, be very long.

It is the object of the present invention, a generic combustion chamber assembly to develop in such a way that the low temperatures Problems occurring in the area of the combustion chamber housing Essentially be eliminated.

According to the present invention, this object is achieved by a Combustion chamber assembly, in particular for a vehicle heater, comprising a combustion chamber housing in which through a combustion chamber outer wall a combustion chamber is limited, the combustion chamber being a Combustion chamber outlet opening has the outlet for combustion generated exhaust gases to a flame tube. This combustor assembly is characterized by a deflection arrangement for deflecting at least a partial flow of the exhaust gases leaving the combustion chamber to flow along at least a portion of that facing away from the combustion chamber lying outside of the combustion chamber outer wall in front of the Entry into the flame tube.

The present invention thus uses at least part of the combustion generated and therefore very hot exhaust gases to these immediately when leaving the combustion chamber housing and before entering to lead the flame tube into an area in which they are essential Heating of the combustion chamber housing can contribute. this leads to a significant reduction in the amount of soot produced during combustion and accordingly also a significant reduction in the Deposits occurring in the combustion chamber. By warming the Combustion chamber assembly is also ensured that the Starting phase can be shortened, because from the beginning the focus on the combustion spreading entire combustion chamber at higher temperature will expire.

For example, it can be provided that the deflection arrangement is one of the Combustion chamber outlet opening opposite baffle. In order for a safe deflection of the exhaust gases leaving the combustion chamber to worry, it is suggested that the baffle plate be fitted with a Panel outer wall of the combustion chamber housing at least in some areas overlaps.

The heating of the combustion chamber housing produced according to the present invention generally does not require that the whole at Exhaust gases produced by combustion are used to transfer heat to get to the combustion chamber housing. It is therefore suggested that the baffle in a diaphragm front wall has a passage opening which faces the combustion chamber outlet opening is positioned horizontally and preferably has a smaller dimension, than the combustion chamber outlet. That way ensures that only a partial flow of the combustion chamber outlet opening outflowing exhaust gases redirected to utilize their heat is, while another part of the incineration Exhaust gases flow directly into the flame tube.

By dividing it into two partial streams, namely one directly into the flame tube inflowing main stream and a redirected for heating and only subsequently introduced into the flame tube, is a created working according to the injector principle, in which a negative pressure due to the partial flow flowing directly into the flame tube is generated, which is essentially responsible for the fact that a Part of the gases or exhaust gases leaving the combustion chamber through the deflector in a defined manner to flow around the combustion chamber housing is deflected on its outside.

A particularly advantageous embodiment in terms of flow technology provides that the baffle with a truncated cone Form is formed and that the combustion chamber housing in the deflector intervenes. It can further be provided that between the deflector and the flame tube in the direction of the deflected exhaust gas flow a flow channel region leading a flame tube outlet opening is. This flow channel area has a throttle function, so that by specifying the flow cross section in this area too taking into account the previously described and by the in the flame tube direct mainstream generated negative pressure Flow rate of those contributing to the combustion chamber heating Exhaust gases can be adjusted.

The present invention further relates to a heater, especially for a Vehicle, in which heater a combustion chamber assembly according to the invention is provided.

The combustion chamber assembly according to the invention is described below with reference to the accompanying drawings. In these drawings:

Fig. 1
a longitudinal sectional view of a combustion chamber assembly known from the prior art;
Fig. 2
a longitudinal sectional view of a combustor assembly according to the invention.

The combustion chamber assembly 10 according to the invention shown in FIG. 2 corresponds to the preceding in terms of essential design features already discussed in detail with reference to FIG. 1 and from the Combustion chamber assembly known in the art. So does the Combustion chamber assembly 10 according to the invention a combustion chamber housing 12 with an outer wall 14 and an inner wall 20, the define an approximately annular combustion chamber 16 between them. This is axially open via the combustion chamber outlet opening 24. At the the inside of the outer wall 14 facing the combustion chamber 16 the liner 32 is provided. In a corresponding way is also on the Inner wall 20 in turn has the lining 36.

The exhaust gas orifice 40 forms in the combustion chamber assembly according to the invention 10 shows a deflection arrangement, generally designated 50. you recognizes that also with this exhaust diaphragm 40 a central, to the longitudinal axis A approximately concentric opening 38 is present, the Outside dimension, for example diameter, is smaller than that corresponding outer dimension of the combustion chamber 16, this outer dimension is essentially predetermined by the outer wall 14 or the lining 32. The exhaust diaphragm 40 has a radially outer side adjacent to its end wall opposite the outlet opening 24 52 an outer wall 54. The outer wall 54 and the End wall 52 together form essentially a truncated cone Pot shape, whereby, as can be seen in Fig. 2, at least in one Partial area, the outer wall 54 is dimensioned such that it is larger Dimension, for example again diameter, than that Outer wall 14 of the combustion chamber housing 12. The exhaust orifice 40 is positioned such that they axially partially surround the combustion chamber housing 12 overlaps. As a result, between the outer wall 14 of the Combustion chamber housing 12 and the outer wall 54 of the exhaust panel 40 an annular flow space 56 is formed, through which at least a part of the striking the end wall 52 and thus through this End wall 52 and also the outer wall 54 deflected exhaust gases will flow. These exhaust gases flow along the outer side 44 of the Outer wall 14 of the combustion chamber housing 12 and transfer it Heat on the combustion chamber housing 12. After the very high Exhaust gases having temperature flowed along this outer side 44 are, they are by the combustion chamber housing 12 radially outside surrounding further housing 58 deflected again, and now arrive into a further flow channel area 60, which is between the outer wall 54 of the exhaust orifice 40 and one accordingly Shape of the outer wall 54 of the exhaust orifice 40 expanding conically Section 62 of the flame tube 26 is formed. After flowing through this area 62 reaches the one which has previously been axially deflected twice Exhaust gas flow in that area of the flame tube 26 in which the emerged directly from the outlet opening 24 and through the through opening 38 of the exhaust orifice 40 passed partial exhaust gas flow flows. The directly through the passage opening 38 in the flame tube 26 entering partial flow of gases or exhaust gases generated in such Arrangement therefore a negative pressure in the radially outer area, i.e. also in the area in which the flow channel area 60 then in the remaining part of the flame tube 26 opens. This negative pressure is in the Also largely responsible for ensuring that the exhaust gas orifice 40 impinging gases at least partially redirected radially outwards and thus into the spatial area 56 on the outside 44 of the outer wall 14 reach. The exhaust gas orifice 40 therefore has the essential function of Flow path for the deflected and above all due to negative pressure to specify extracted exhaust gases and thus to ensure that the outside 44 flows around the outer wall 14 to the desired extent and is therefore heated.

The configuration of the combustion chamber assembly 10 according to the invention is achieved that part of the combustion chamber with very high temperature 16 leaving exhaust gases immediately, ie before entering the flame tube 26, used to at least part of the combustion generated heat to the combustion chamber housing 12 itself transfer. Tests have shown that this increases the temperature of the combustion chamber housing 12, in particular in the area of the floor 18 can be obtained at around 280 ° C, so the temperature in this Range reached values between 400 ° C and 500 ° C very quickly. It in addition to quickly reaching high temperatures achieves significantly more uniform temperature distribution, which has the consequence that the start phase when igniting and until ramping up to the required Rated power can be significantly reduced. The principle of the invention is furthermore essentially independent of the fuel used, since the temperatures generated in the combustion chamber area above the boiling temperatures the one for such combustion chambers or these Fuels used, e.g. Diesel or heating oil. In addition to a significantly more efficient operation, a clear one can also Reduction of the soot generated during combustion and the in the area of the walls delimiting the combustion chamber Deposits can be reached.

Claims (7)

  1. Combustion chamber assembly (12), in particular for a vehicle heater, comprising a combustion chamber housing in which a combustion chamber (16) is delimited by a combustion chamber outer wall (14), the combustion chamber (16) having a combustion chamber outlet opening (24) for the exit of exhaust gases generated during combustion a flame tube (26),
    characterized by a deflection arrangement (50) for deflecting at least a partial flow of the exhaust gases leaving the combustion chamber (16) for flowing along at least a portion of the outside (44) of the combustion chamber outer wall (14) facing away from the combustion chamber (16) before entering the flame tube (26).
  2. Combustion chamber assembly according to claim 1,
    characterized in that the baffle arrangement (50) comprises a baffle (40) opposite the combustion chamber outlet opening (24).
  3. Combustion chamber assembly according to claim 2,
    characterized in that the deflecting diaphragm (40) overlaps the combustion chamber housing (12) at least in regions with an outer diaphragm wall (54).
  4. Combustion chamber assembly according to claim 2 or 3,
    characterized in that the deflecting diaphragm (40) has a passage opening (38) in a diaphragm end wall (52) which is positioned opposite the combustion chamber outlet opening (24) and preferably has a smaller dimension than the combustion chamber outlet opening (24).
  5. Combustion chamber assembly according to claim 3 and claim 4,
    characterized in that the baffle (40) is formed with a frustoconical shape and that the combustion chamber housing (12) engages in the baffle (40).
  6. Combustion chamber assembly according to one of claims 2 to 5,
    characterized in that a flow channel region (60) guiding the deflected exhaust gas flow in the direction of a flame tube outlet opening (42) is formed between the deflector (40) and the flame tube (26).
  7. Heating device, in particular for a vehicle, comprising a combustion chamber assembly (10) according to one of the preceding claims.
EP20020021003 2002-01-09 2002-09-20 Combustor, especially a combustor for vehicle heating Not-in-force EP1327820B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2002100524 DE10200524C5 (en) 2002-01-09 2002-01-09 Combustor assembly, in particular for a vehicle heater
DE10200524 2002-01-09

Publications (3)

Publication Number Publication Date
EP1327820A1 true EP1327820A1 (en) 2003-07-16
EP1327820A8 EP1327820A8 (en) 2003-11-12
EP1327820B1 EP1327820B1 (en) 2005-07-20

Family

ID=7711729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020021003 Not-in-force EP1327820B1 (en) 2002-01-09 2002-09-20 Combustor, especially a combustor for vehicle heating

Country Status (5)

Country Link
US (1) US6811395B2 (en)
EP (1) EP1327820B1 (en)
JP (1) JP2003240211A (en)
AT (1) AT300016T (en)
DE (1) DE10200524C5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106133444A (en) * 2014-03-20 2016-11-16 韦巴斯托股份公司 For utilizing the vaporizing combustor of the portable heating unit of liquid fuel operation

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314836A1 (en) * 2003-04-01 2004-10-28 J. Eberspächer GmbH & Co. KG Burner arrangement for a heater and heater, in particular vehicle heater
DE10343282B3 (en) * 2003-09-18 2005-04-21 J. Eberspächer GmbH & Co. KG Burner arrangement, in particular for a vehicle heater
DE102004002246A1 (en) * 2004-01-15 2005-08-11 J. Eberspächer GmbH & Co. KG Device for producing an air / hydrocarbon mixture
DE102006024221A1 (en) * 2006-05-23 2007-11-29 J. Eberspächer GmbH & Co. KG Evaporator assembly, in particular for a vehicle heater or a reformer assembly of a fuel cell system
GB0902221D0 (en) * 2009-02-11 2009-03-25 Edwards Ltd Pilot
DE102013214387A1 (en) * 2013-07-23 2015-01-29 Eberspächer Climate Control Systems GmbH & Co. KG Inflow, in particular for a combustion air flow path in the vehicle heater
DE102014103813A1 (en) 2014-03-20 2015-09-24 Webasto SE Evaporator burner assembly for a mobile liquid fueled heater
DE102014103812A1 (en) 2014-03-20 2015-09-24 Webasto SE Evaporator burner for a mobile liquid fueled heater
DE102014103815B4 (en) 2014-03-20 2018-07-19 Webasto SE Evaporative burner
DE102018131253A1 (en) 2018-12-07 2020-06-10 Eberspächer Climate Control Systems GmbH & Co. KG Combustion chamber assembly

Citations (5)

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Publication number Priority date Publication date Assignee Title
US3543742A (en) * 1967-07-07 1970-12-01 Sueddeutsche Kuehler Behr Heater for burning liquid fuel,primarily benzine,especially extraneous heater for motor vehicles
US4471754A (en) * 1981-09-16 1984-09-18 Webasto-Werk W. Baier Gmbh Vehicle heater
US4623310A (en) * 1985-04-24 1986-11-18 Mikuni Kogyo Kabushiki Kaisha Vaporized liquid fuel combustion apparatus
DE19529994A1 (en) * 1994-11-10 1996-05-15 Eberspaecher J Evaporator burner for a heater
US5947717A (en) * 1995-07-14 1999-09-07 J. Eberspacher Gmbh & Co. Vaporizing combustion chamber for a heater running on liquid fuel

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DE1257396B (en) * 1962-10-04 1967-12-28 Eberspaecher J With liquid fuel-powered atomizer burner, particularly for heaters
WO1987000605A1 (en) * 1985-07-18 1987-01-29 Alain Guerin Thermal reactor for improving the combustion efficiency of a burner
FR2643136B1 (en) * 1989-02-14 1991-06-14 Lavorel Henri Thermal reactor in particular for boiler and fuel generator
DE4111915C3 (en) * 1991-04-12 1998-08-13 Froeling Kessel App Boiler for the combustion of liquid or gaseous fuels
CH682765A5 (en) * 1992-07-02 1993-11-15 Rudolf Mueller Burner with toroidal, cyclonic gas guide.
DE4304057A1 (en) * 1993-02-11 1994-08-18 Froeling Kessel App Heating boiler for low-pollutant combustion
DE19645180A1 (en) * 1996-11-02 1998-05-07 Eberspaecher J Gmbh & Co Pressure atomizer burner for an engine-independent vehicle heater
JP3773152B2 (en) * 1997-12-09 2006-05-10 株式会社ミクニアデック Evaporative combustion heater for vehicles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543742A (en) * 1967-07-07 1970-12-01 Sueddeutsche Kuehler Behr Heater for burning liquid fuel,primarily benzine,especially extraneous heater for motor vehicles
US4471754A (en) * 1981-09-16 1984-09-18 Webasto-Werk W. Baier Gmbh Vehicle heater
US4623310A (en) * 1985-04-24 1986-11-18 Mikuni Kogyo Kabushiki Kaisha Vaporized liquid fuel combustion apparatus
DE19529994A1 (en) * 1994-11-10 1996-05-15 Eberspaecher J Evaporator burner for a heater
US6027334A (en) * 1994-11-10 2000-02-22 J. Eberspacher Gmbh & Co. Evaporation burner for a heater
US5947717A (en) * 1995-07-14 1999-09-07 J. Eberspacher Gmbh & Co. Vaporizing combustion chamber for a heater running on liquid fuel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106133444A (en) * 2014-03-20 2016-11-16 韦巴斯托股份公司 For utilizing the vaporizing combustor of the portable heating unit of liquid fuel operation
CN106133444B (en) * 2014-03-20 2018-06-22 韦巴斯托股份公司 For utilizing the vaporizing combustor of the mobile heating unit of liquid fuel operation

Also Published As

Publication number Publication date
US6811395B2 (en) 2004-11-02
EP1327820B1 (en) 2005-07-20
JP2003240211A (en) 2003-08-27
DE10200524C1 (en) 2003-06-12
DE10200524C5 (en) 2008-07-17
AT300016T (en) 2005-08-15
US20030138751A1 (en) 2003-07-24
EP1327820A8 (en) 2003-11-12

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