EP0913640A2 - Brennkammer, insbesondere für Gas-Warmwasserbereiter- und Gas-Heizungsgerätebrenner - Google Patents
Brennkammer, insbesondere für Gas-Warmwasserbereiter- und Gas-Heizungsgerätebrenner Download PDFInfo
- Publication number
- EP0913640A2 EP0913640A2 EP98119352A EP98119352A EP0913640A2 EP 0913640 A2 EP0913640 A2 EP 0913640A2 EP 98119352 A EP98119352 A EP 98119352A EP 98119352 A EP98119352 A EP 98119352A EP 0913640 A2 EP0913640 A2 EP 0913640A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- chamber according
- temperature
- reflecting layer
- ceramic
- 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- Withdrawn
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
- F23M5/085—Cooling thereof; Tube walls using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2900/00—Special features of, or arrangements for combustion chambers
- F23M2900/05004—Special materials for walls or lining
Definitions
- the invention relates to a combustion chamber, in particular for Gas water heaters and gas heater burners that a at least laterally delimiting the combustion chamber Have a combustion chamber wall made of temperature-resistant material, the combustion chamber having a burner at a lower level and has a heat exchanger arranged above it.
- Such a combustion chamber is e.g. from DE 30 24 792 C2 known.
- combustion chambers are used for the combustion chamber wall Thermal insulation mostly made of ceramic fibers used, the wall thickness is about 10 mm and for Stabilization are provided with a sheet metal jacket. At full load operation of gas-fired device burners occur the outer surface of the combustion chamber wall, i.e. on the sheet metal casing Peak temperatures up to approx. 300 ° C. The average wall temperature is over 200 ° C. Thereby the combustion chamber experiences radiation losses that are common are in the range of 5-9%.
- the ceramic fiber thermal insulation panels used for the combustion chamber wall represent an inexpensive solution for the required thermal insulation of the combustion chamber wall, however have a biologically and physiologically questionable Fiber material through openings in the sheet metal jacket step out and into the lungs of a living being, especially of a human being.
- the above task is in a generic combustion chamber solved according to the invention in that the combustion chamber wall through a self-supporting high temperature resistant ceramic thermal insulation panel with low thermal conductivity is formed, which on its inner wall surface is coated with an infrared reflecting layer.
- the infrared reflecting layer improved reflective properties of the inner surface of the Combustion chamber wall, the transmission losses of the Combustion chamber reduced, the heat remains in one larger part in the combustion chamber or in the combustion gases and can be transferred to the water via the heat exchanger be fed.
- a high water efficiency can be achieved with this combustion chamber wall achieve without water cooling.
- the thickness of the infrared reflecting layer is only a few ⁇ m.
- Such a layer can be flame or Plasma spraying, vapor deposition or on chemical / electrochemical Be applied away.
- a material for this Temperature resistant metals and coating come Metal alloys and according to their emission spectrum selected ceramic materials, e.g. Alumina in question.
- Ceramic material existing coating is for the degradation of Temperature peaks and especially to avoid cracks advantageous.
- the coating eliminates temperature peaks at the Dismantled inside the combustion chamber wall. An even one The result is temperature distribution. In the self-supporting Thermal insulation board used ceramic Backing material is caused by temperature peaks thermal stresses and shrinkage cracks reduced or avoided.
- the combustion chamber wall can be opened have a sheet metal casing on their outer surface.
- This Sheet metal sheathing can be between itself and the ceramic Plate have an air gap, so that additional air through openings on the underside of the combustion chamber wall in enter this air gap and the ceramic plate of the Can cool the combustion chamber wall.
- the only drawing figure shows schematically one Cross section through a section of an inventive Embodiment of the proposed combustion chamber.
- the combustion chamber 4 shown in the figure forms one from the combustion chamber wall 1 laterally surrounded space, and a Burner 2 is in a down position and on Heat exchanger 3 at an overlying position arranged.
- the burner 2 is preferably a gas burner a gas water heater or gas heater.
- the combustion chamber wall 1 consists of a self-supporting high temperature resistant ceramic Thermal insulation plate 10 with low thermal conductivity, that on its inner wall surface 11 with a layer 12 is provided, which is primarily the infrared radiation spectrum reflected.
- This layer 12 is either through Flame or plasma spraying, by vaporization or on applied chemical / electrochemical way.
- the material of the thin infrared reflecting layer 12 on the inner wall surface of the heat-insulating ceramic Plate 10 can e.g. a temperature-resistant metal or too be a temperature-resistant metal alloy. Alternatively, you can the infrared reflecting layer from a according to his Emission spectrum selected ceramic material consist. Such a ceramic material of layer 12 can e.g. Be alumina.
- the figure shows the thickness of the layer 12 in Relative to the thickness of the ceramic plate 10 exaggerated represents.
- the thickness of the infrared reflective layer should only be a few ⁇ m.
- One for the self-supporting heat-insulating ceramic Suitable material is high temperature resistant Structural ceramics, e.g. a well-known from gas turbine construction Silicon nitride or silicon carbide material.
- the combustion chamber wall 1 does not necessarily need an additional support or casing.
- the ceramic plate 10 encasing sheet metal jacket 14 is provided be.
- This sheet metal jacket 14 can be arranged such that between the heat insulating high temperature resistant ceramic plate 10 and the sheet metal jacket 14 an air gap 13 remains, the one of the burner during operation cool air flow from the ambient air flows through, through openings on the underside of the combustion chamber wall and through other openings at the top of the same can leak. This air flow through the air gap 13 cools the ceramic plate 10 on its outside and additionally the sheet metal jacket 14.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
Claims (10)
- Brennkammer, insbesondere für Gas-Warmwasserbereiter- und Gas-Heizungsgerätebrenner, die eine die Brennkammer (4) wenigstens seitlich begrenzende Brennkammerwand (1) aus temperaturfestem Material aufweisen, wobei die Brennkammer (4) einen tieferliegenden Brenner (2) und einen darüber angeordneten Wärmeübertrager (3) aufweist,
dadurch gekennzeichnet, daß die Brennkammerwand (1) durch eine selbsttragende hochtemperaturfeste keramische Wärmeisolationsplatte (10) mit geringer Wärmeleitfähigkeit gebildet ist, welche auf ihrer Innenwandfläche (11) mit einer infrarotreflektierenden Schicht (12) beschichtet ist. - Brennkammer nach Anspruch 1, dadurch gekennzeichnet, daß die selbsttragende wärmeisolierende keramische Platte (10) aus hochtemperaturbeständiger Strukturkeramik besteht.
- Brennkammer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Dicke der infrarotreflektierenden Schicht (12) einige µm beträgt.
- Brennkammer nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die infrarotreflektierende Schicht (12) aus einem temperaturfesten Metall oder einer solchen Metallegierung besteht.
- Brennkammer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die infrarotreflektierende Schicht (12) aus einem nach seinem Emissionsspektrum ausgewählten keramischen Material besteht.
- Brennkammer nach Anspruch 5, dadurch gekennzeichnet, daß das keramische Material der infrarotreflektierenden Schicht (12) Aluminiumoxid, z.B. Korund, ist.
- Brennkammer nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die hochtemperaturbeständige keramische Wärmeisolationsplatte (10) der Brennkammerwand (1) zusätzlich auf ihrer Außenwandfläche eine Blechummantelung (14) aufweist.
- Brennkammer nach Anspruch 7, dadurch gekennzeichnet, daß die Blechummantelung unter Einhaltung eines Luftspaltes (13) die keramische Platte (10) ummantelt.
- Brennkammer nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Querschnitt der Brennkammerwand rechteckig ist.
- Brennkammer nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie in Gas-Warmwasserbereitern und Gas-Heizungsgerätebrennern einsetzbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19748260 | 1997-10-31 | ||
DE1997148260 DE19748260A1 (de) | 1997-10-31 | 1997-10-31 | Brennkammer, insbesondere für Gas-Warmwasserbereiter- und Gas-Heizungsgerätebrenner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0913640A2 true EP0913640A2 (de) | 1999-05-06 |
EP0913640A3 EP0913640A3 (de) | 2000-05-03 |
Family
ID=7847293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98119352A Withdrawn EP0913640A3 (de) | 1997-10-31 | 1998-10-14 | Brennkammer, insbesondere für Gas-Warmwasserbereiter- und Gas-Heizungsgerätebrenner |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0913640A3 (de) |
DE (1) | DE19748260A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1469096A1 (de) * | 2003-04-18 | 2004-10-20 | "System" Spolka Akcyjna | Verfahren zur Herstellung von Antikorrosionsschutzüberzügen für Kühlschirme in Feuerkammern |
CN103411311A (zh) * | 2013-07-18 | 2013-11-27 | 芜湖美的厨卫电器制造有限公司 | 燃气热水器的热交换器及燃气热水器 |
CN112747457A (zh) * | 2021-01-29 | 2021-05-04 | 中山市恒乐电器有限公司 | 一种热水器用热交换结构 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009015154B4 (de) | 2009-03-26 | 2018-06-14 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Wärmedämmschutzbauteile |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3024792C2 (de) | 1979-07-13 | 1988-09-08 | E.L.M. Leblanc, Drancy, Fr |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2505765A1 (de) * | 1975-02-12 | 1976-08-19 | Bosch Gmbh Robert | Wassererhitzer mit einem gas- oder oelbrenner |
CS197697B1 (en) * | 1977-11-22 | 1980-05-30 | Vaclav Pilous | Double course protective coat of heat stressed components |
US4630594A (en) * | 1983-03-09 | 1986-12-23 | Ellersick Russell R | Furnace wall lining composition and the use thereof |
DE4025583A1 (de) * | 1990-08-11 | 1992-02-13 | Bosch Gmbh Robert | Wassererhitzer |
AT400485B (de) * | 1992-04-07 | 1996-01-25 | Vaillant Gmbh | Ungekühlter brennkammerschacht zur führung von brenngasen eines brenners |
DE9415989U1 (de) * | 1994-10-05 | 1996-02-01 | Viessmann Werke Gmbh & Co, 35108 Allendorf | Wärmedämmformstück |
-
1997
- 1997-10-31 DE DE1997148260 patent/DE19748260A1/de not_active Withdrawn
-
1998
- 1998-10-14 EP EP98119352A patent/EP0913640A3/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3024792C2 (de) | 1979-07-13 | 1988-09-08 | E.L.M. Leblanc, Drancy, Fr |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1469096A1 (de) * | 2003-04-18 | 2004-10-20 | "System" Spolka Akcyjna | Verfahren zur Herstellung von Antikorrosionsschutzüberzügen für Kühlschirme in Feuerkammern |
CN103411311A (zh) * | 2013-07-18 | 2013-11-27 | 芜湖美的厨卫电器制造有限公司 | 燃气热水器的热交换器及燃气热水器 |
CN112747457A (zh) * | 2021-01-29 | 2021-05-04 | 中山市恒乐电器有限公司 | 一种热水器用热交换结构 |
Also Published As
Publication number | Publication date |
---|---|
DE19748260A1 (de) | 1999-08-12 |
EP0913640A3 (de) | 2000-05-03 |
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