WO2000063619A1 - Combustion chamber of a heating device - Google Patents
Combustion chamber of a heating device Download PDFInfo
- Publication number
- WO2000063619A1 WO2000063619A1 PCT/EP2000/003053 EP0003053W WO0063619A1 WO 2000063619 A1 WO2000063619 A1 WO 2000063619A1 EP 0003053 W EP0003053 W EP 0003053W WO 0063619 A1 WO0063619 A1 WO 0063619A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fine structure
- combustion chamber
- inner tube
- openings
- chamber according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D3/00—Burners using capillary action
- F23D3/40—Burners using capillary action the capillary action taking place in one or more rigid porous bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D3/00—Burners using capillary action
- F23D3/02—Wick burners
- F23D3/18—Details of wick burners
Definitions
- the invention relates to the combustion chamber of a heater, in particular for motor vehicles, with an annular mixing and burning zone between an outside flame tube and an inner tube arranged concentrically therein, which is provided for introducing combustion air into the mixing and burning zone, and a jacket provided with openings for this purpose having.
- the inner pipe is formed as so-called slotted tube, the jacket of the inner tube that has elongate axial slots through which excreted with swirl in the in ⁇ nenrohr introduced combustion air from the inner tube into the mixing and combustion zone.
- slotted tube the jacket of the inner tube that has elongate axial slots through which excreted with swirl in the in ⁇ nenrohr introduced combustion air from the inner tube into the mixing and combustion zone.
- the object of the invention is to ensure a particularly low level of noise during heating operation.
- the invention is based on the general idea of dividing the total cross section of the openings in the jacket of the inner tube into a large number of very small, closely adjacent openings, so that relatively large porous or lattice-like zones are formed in the jacket of the inner tube.
- the temperature conditions on the outside of the inner tube are also stabilized by the porous or grid-like wall. This is because the material forming the fine structures leads to a reduction in possible temperature fluctuations, so that the formation of turbulence directly on the outside of the inner tube and thus the possibility of turbulence kicking back into the inner tube is also counteracted in this way.
- the fine structure is catalytically coated, so that any fuel particles deposited or adhering there are quickly broken down and quickly fed to combustion in the mixing and combustion zone by the combustion air penetrating the fine structure.
- the openings of the inner tube are only partially provided with the porous fine structure.
- the fine structures in the front opening part are therefore each at a smaller distance from the center of the inner tube than the fine structures in the rear opening part.
- Appropriate recesses on the inner and outer circumference of the inner tube can be used to ensure that the inner surface of the inner fine structure lies in the same plane as the rest of the inner wall of the inner tube, while the outside of the outer fine structure is flush with the outer circumference of the inner tube.
- Fig. 1 is a highly schematic sectional view of a heater with a combustion chamber designed according to the invention
- Fig. 2 is a sectional view of an inner tube.
- the air heater shown in FIG. 1 has a mixing and burning zone 1, which is designed as an annular space between an inner tube 2 and a flame tube 3 concentrically enveloping the inner tube 2.
- the inner tube 2 has a closed end on the right in the drawing and an opposite open end into which combustion air conveyed by a fan wheel 5 is blown into the inner tube 2 with a swirl via a diffuser 4. This combustion air enters the mixing and combustion zone 1 via openings 6 formed in the jacket of the inner tube 2, the construction of which is explained below.
- the mixing and firing zone 1 is closed off by an end wall.
- a diaphragm 7 is arranged, through the central opening of which the mixing and combustion zone 1 is connected to the interior of a heat exchanger 8.
- the inner wall of the part of the flame tube 3 facing the fan wheel or wall regions thereof are covered by a wire fleece, which absorbs fuel supplied in the manner of a wick, the fuel evaporating from this wire fleece then supplying combustion air via the inner tube 2 in the mixing and Burning zone 1 burns off automatically.
- a radial sack space 9 is arranged on the side of the mixing and firing zone 1 and receives a glow plug, not shown, by means of which the aforementioned fuel, which is supplied via a fuel line 10, can be ignited.
- the combustion gases formed during the combustion are deflected upon passage into the heat exchanger 8 and led to an exhaust pipe 11 which is arranged laterally on the heat exchanger 8 at the left end in the drawing.
- the heat of the combustion gases is transferred to the inner wall and inner fins 12 of the heat exchanger 8.
- the outside of the heat exchanger 8 is surrounded by air, which is blown by a further fan wheel 13 through a housing 14 which surrounds the heat exchanger 8 at a distance and an outside rib 15 of the heat exchanger 8 and from the outlet of the housing 14 into an interior of a motor vehicle or the like to be heated . is directed.
- the fan wheel 5 for the combustion air and the fan wheel 13 for the heating air are jointly operated by an electric motor 16 or the like. driven.
- the heat exchanger 8 can also be surrounded by a water jacket, the water being able to be guided helically from an entrance to an exit and not flowing through a guide webs on the outside of the heat exchanger and flowing in a circuit which flows via an or leads several radiators, not shown, and / or via the cooling circuit of a motor vehicle engine.
- the special feature of the invention now lies in the formation of the openings 6 in the jacket of the inner tube 2.
- the jacket of the inner tube has 2 zones with a porous fine structure.
- This fine structure can be formed, for example, by a “close-knit” wire mesh, which is arranged on or in openings in the jacket of the inner tube 2 and covers all or part of it.
- 2 axial slots can be arranged in the jacket of the inner tube, which are covered on the outside and / or inside of the jacket by the aforementioned metal mesh, the metal mesh possibly covering the entire outer and / or inner circumference of the inner tube.
- openings with a different shape for example openings distributed like a grid, for example circular openings, can also be provided, which in turn are covered on the outside and / or inside with the wire mesh.
- a wire mesh instead of a wire mesh, a wire mesh or a fine-mesh wire mesh can also be provided.
- the openings can also be formed by sintered or fiber metal or metal foam.
- porous ceramics can also be used. If necessary, the entire jacket of the inner tube can consist of sintered or fiber metal, metal foam or ceramic.
- the combustion air passing through the openings 6 from the interior of the inner tube 2 into the mixing and combustion zone 1 forms a relatively stable boundary layer on the outside of the inner tube 2, which protects the inner tube 2 and in particular the interior thereof from turbulence shields the mixing and firing zone 1 during firing operation and thus prevents the generation of unpleasant noises.
- Can structures by a catalytic coating of the porous fine structural ⁇ the formation of deposits from fuel residues and the like can be prevented particularly effectively. This ensures, even under the most unfavorable operating conditions, that the combustion air can penetrate the openings 6 or the fine structure forming these openings in the desired manner.
- a particular advantage of the invention is that the desired noise reduction is made possible without any other structural changes to the heater.
- the openings 6 of the inner tube 2 are only provided with fine structures 17 and 18 in some areas.
- the inner fine structure 17 forms a cylinder-like part which, on the one hand, at the left end of the inner tube in FIG. 2, where the combustion air enters the inner tube 2, covers the inner wall of the inner tube and a portion of the openings 6.
- a recess or material removal is provided in the inner circumference of the inner tube such that the inner circumferential side of the fine structure 17 is aligned with the inner circumferential wall of the inner tube which adjoins axially to the right in FIG. 2.
- the outer fine structure 18 also forms a cylinder-like part, which, however, has a larger diameter than the fine structure 17 and is arranged on the outside of the inner tube 2 with partial covering of the openings 6.
- a deposit or material removal on the outer circumferential side of the inner tube 2 ensures that the outer circumferential side of the fine structure 18 is flush with the other outer circumferential side of the inner tube 2.
- the fine structures 17 and 18 not only reduce the effective cross section of the openings 6. Rather, they also form areas of increased roughness on the inside or outside of the inner tube 2, with the result that the combustion air flowing through or flowing around the inner tube has a boundary fluidized bed generates increased thickness and thus the free cross section available for the flow of the combustion air inside and outside the inner tube is narrowed by fluid dynamics effects and the flow velocity of the combustion air is increased in the remaining cross section.
- the fine structure 17 and / or 18 each have a radial distance from the wall of the inner tube 2.
- Each fine structure can in turn be designed as a cylinder part and can be held by cam-like projections which are arranged or formed on the wall of the inner tube 2. Such an arrangement is also possible if only a single cylindrical fine structure is provided which, if necessary, can also completely cover the openings 6.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Air Supply (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10081024T DE10081024D2 (en) | 1999-04-15 | 2000-04-06 | Combustion chamber of a heater |
JP2000612673A JP2002542446A (en) | 1999-04-15 | 2000-04-06 | Combustion chamber of heating device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19916968 | 1999-04-15 | ||
DE19950894.1 | 1999-10-22 | ||
DE19916968.3 | 1999-10-22 | ||
DE19950894A DE19950894A1 (en) | 1999-04-15 | 1999-10-22 | Combustion chamber, for heater in motor vehicle, for example, has openings in inner jacket of forming completely or partially a porous fine structure, and end of inner pipe protruding into flame tube has closed end face base |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000063619A1 true WO2000063619A1 (en) | 2000-10-26 |
Family
ID=26052912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/003053 WO2000063619A1 (en) | 1999-04-15 | 2000-04-06 | Combustion chamber of a heating device |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2002542446A (en) |
CZ (1) | CZ20013703A3 (en) |
DE (1) | DE10081024D2 (en) |
WO (1) | WO2000063619A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013200016A1 (en) * | 2013-01-02 | 2014-07-03 | Eberspächer Climate Control Systems GmbH & Co. KG | Catalytic burner, in particular for vehicle heating |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0622587A2 (en) * | 1992-04-30 | 1994-11-02 | Poretti-Gaggini Sa | Method for burning gases and combustion chamber for carrying out this method |
DE19504180A1 (en) * | 1995-02-09 | 1996-08-14 | Eberspaecher J | Heater for vehicles in particular |
WO1997040315A1 (en) * | 1996-04-20 | 1997-10-30 | Joh. Vaillant Gmbh U. Co. | COMBUSTION DEVICE AND METHOD FOR OPERATING A COMBUSTION DEVICE FOR LOW-NOx AND LOW-CO COMBUSTION |
-
2000
- 2000-04-06 WO PCT/EP2000/003053 patent/WO2000063619A1/en active Application Filing
- 2000-04-06 JP JP2000612673A patent/JP2002542446A/en not_active Withdrawn
- 2000-04-06 DE DE10081024T patent/DE10081024D2/en not_active Ceased
- 2000-04-06 CZ CZ20013703A patent/CZ20013703A3/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0622587A2 (en) * | 1992-04-30 | 1994-11-02 | Poretti-Gaggini Sa | Method for burning gases and combustion chamber for carrying out this method |
DE19504180A1 (en) * | 1995-02-09 | 1996-08-14 | Eberspaecher J | Heater for vehicles in particular |
WO1997040315A1 (en) * | 1996-04-20 | 1997-10-30 | Joh. Vaillant Gmbh U. Co. | COMBUSTION DEVICE AND METHOD FOR OPERATING A COMBUSTION DEVICE FOR LOW-NOx AND LOW-CO COMBUSTION |
Also Published As
Publication number | Publication date |
---|---|
DE10081024D2 (en) | 2001-12-13 |
CZ20013703A3 (en) | 2003-01-15 |
JP2002542446A (en) | 2002-12-10 |
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