EP1486727A1 - Gasmischvorrichtung für einen Gasbrenner - Google Patents
Gasmischvorrichtung für einen Gasbrenner Download PDFInfo
- Publication number
- EP1486727A1 EP1486727A1 EP04013066A EP04013066A EP1486727A1 EP 1486727 A1 EP1486727 A1 EP 1486727A1 EP 04013066 A EP04013066 A EP 04013066A EP 04013066 A EP04013066 A EP 04013066A EP 1486727 A1 EP1486727 A1 EP 1486727A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- linearization
- air
- flow
- inlet opening
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details
- F23D14/60—Devices for simultaneous control of gas and combustion air
Definitions
- the invention relates to a gas mixing device for a gas burner, consisting from a gas fitting, which is connected via a gas supply line to a mixing room is, which has at least one air inlet opening, and a fan, which is in communication with the input side of the air inlet opening or which with the output side of the mixing chamber and a burner is connected.
- the invention also relates to a method for operating a mixing device for a gas burner with a mixing chamber, which has a fan with the burner connected.
- Such gas mixing devices serve the preparation of the gas-air mixture for example, for condensing appliances.
- the volume flows of fuel gas and combustion air in the mixing space and merged by means of Blower supplied to the burner.
- the burner output is determined by the blower amount of delivered air determined. This creates by a bottleneck at the Air inlet opening in the mixing chamber a negative pressure that is exploited to to regulate the volume flow of the fuel gas, that this by means of a Pressure regulator is kept in the gas valve to ambient pressure and then a appropriately sized bottleneck happens.
- the ratio of pressure difference and flow at a bottleneck has one parabolic course.
- Pressure difference can be varied by a factor of 100. This makes high demands the gas mixing device, which entail high costs.
- the object is achieved in that in the gas supply line a linearization element is arranged and at the mixing room at least another Linearization element is arranged for the air supply. This will achieve that the ratio of pressure difference and volume flow is linear and therefore the occurring pressure differences vary much less than when using Narrows to determine the volume flows.
- the components of Gas mixing device must therefore meet lower requirements and can be carried out inexpensively.
- the linearization element in the gas supply line as a laminar flow element formed is a linear over a large range of the differential pressure Connection to the volume flow achieved.
- a low susceptibility to contamination from the ambient air is achieved by the linearization element as an air inlet opening with it behind attached control is formed.
- control is as, permanently elastic tongue formed by means of a spacer in the mixing chamber in the direction of Air flow is arranged behind the air inlet opening.
- a good resistance to changes in the gas-air mixture by Aging of components of the gas mixing device is achieved by the Control of thin sheet metal, preferably made of spring steel is formed.
- a development of the embodiment according to the invention provides that the Control is in operative connection with an active component. hereby The mixing ratio of the gas-air mixture can be adjusted specifically.
- variable gas mixing device A particularly easy-to-control embodiment of the variable gas mixing device is provided by that to the control a permanent magnet is mounted, which is in operative connection with an electromagnet.
- the object of the invention relating to the method is achieved in that the Ratio of pressure and flow in the gas supply by a Linearization is linearized and the air flow through the mixing chamber another linearization element is linearized. This ensures that in at an enlarged modulation range of the volume flow, the pressure differences stay in a technically easier realizable area.
- a particularly large modulation ratio with constant mixture preparation is achieved by linearizing the ratio of pressure and pressure Volume flow at the linearization element on the linearization of the ratio of pressure and flow on the linearization element in the gas supply line in such a way It is agreed that a constant ratio of gas quantity to air volume in the mixing room is reached.
- the force of the electromagnet on the Permanent magnet set such that by the change in cross section of the Air inlet opening the ratio of gas quantity and air volume changed specifically is, the mixing ratio of the gas-air mixture in wide ranges be set.
- An automatic control of the gas-air mixture is achieved by the Gas mixing device with a sensor for determining the air ratio (lambda) is provided, the output signal of the sensor fed to a control element and the output signal of the control element is supplied to the electromagnet.
- Fig. 1 shows a simplified embodiment of a gas mixing device 1 for a Burner 50, as currently used for example for mixing gas and air for a Condensing boilers are used.
- Such a gas mixing device 1 consists of a gas fitting 30, which with a Gas line 40 is connected, which is connected to a mixing chamber 10, which is in turn connected via a blower 20 with a burner 50.
- the gas valve 30 consists of two safety valves 32, 33 and a pressure regulator 31.
- Der Mixing chamber 10 has at least one air inlet opening 12 over which Combustion air can flow into the mixing chamber 10.
- the mixing chamber 10 is one-sided with the Blower 20 is connected, which has an impeller 21 and a motor 22. The gas-air mixture is sucked in by means of the blower 20 and via a Gas mixture line 23 fed to the burner 50.
- the one Pressure regulator 31 contains the gas pressure in the gas fitting 30 on the value of the Environmental pressure holds.
- the gas mixing device 1 consists of a Gas fitting 30, which is connected to a gas line 40 which communicates with a mixing chamber 10 is connected, which in turn is connected to a burner 50.
- the Gas fitting 30 consists of two safety valves 32, 33 and a pressure regulator 31.
- the gas supply line 40 By the gas supply line 40, a bottleneck 42 between the gas fitting 30 and Having mixing chamber 10, the fuel gas can flow into the mixing chamber 10, the for example, in the form of a mixing tube can be executed.
- the mixing room 10 has at least one air inlet opening 12, via the combustion air in can flow in the mixing chamber 10.
- the air inlet opening is provided with a fan 20 connected, which has an impeller 21 and a motor 22.
- Of the Pressure regulator 31 is by means of a pressure line 34 with the air supply behind the Blower 20 and connected in front of the air inlet opening 12.
- Fig. 3 is a simplified gas mixing device 1 in the inventive Execution shown.
- the gas supply line 40 instead of the constriction 42 a linearization element 41, for example, a laminar Flow element on.
- This element consists of numerous channels with low Cross section through which gas can flow. Characteristic of such laminar Flow elements is that the ratio of volume flow and pressure drop up to a certain volume flow is almost linear.
- the inventive embodiment of the gas mixing device 1 at the Mixing space 10 at least one linearization element 11, which is a linear Ratio of volume flow and pressure drop of the air flowing through has.
- This linearization element 11 consists of an air inlet opening 12, a Control 13 and a spacer 14, wherein the control 13th within the mixing chamber 10 in the direction of the air flow behind the Air inlet opening 12 is arranged.
- Fig. 4 is a gas mixing device 1 in the inventive embodiment represented, in which the pressure regulator 31 as in Fig. 2 via the pressure line 34 with the Air supply is connected in front of the air inlet opening 12 and the gas pressure regulates the existing value of the Heilruckes.
- the fan 20 in the gas flow direction in front of the mixing chamber 10.
- Fig. 5 shows the linearization element 11 in an enlarged view.
- the control element 13 is within the mixing chamber 10 via a Air inlet opening 12 by means of a spacer 14 mounted such that at rest or at minimum flow a minimum Forms cross-sectional area for the incoming air, which in particular by the Height of the spacer 14 can be adjusted.
- the control 13 closes the air inlet opening 12 almost. With increasing volume flow, this bends Control 13 in the flow direction, thus increasing the cross-sectional area for the incoming air and reduces the pressure drop. With this control 13 is achieved that the pressure drop in dependence on the flow on the Air inlet opening 12 is nearly linearized.
- the control element 13 can in the simplest case as permanently elastic tongue be formed, and for example from a formed of thin sheet metal Spring exist.
- the tongue of spring steel or plastic consist.
- a laminar flow element in the region of the at least one air inlet opening 12 also a laminar flow element are used, but with the disadvantage that this is added comparatively quickly with dust from the ambient air.
- control element 13 may take the form of a Exhaust flap be provided. In this embodiment, on the Spacers are dispensed with.
- two are in the gas mixing device 1 different methods for linearizing the patterns of pressure drop of the air and used the gas flow.
- the ratio of pressure and Volume flow in the gas supply line 40 by a linearization element 41 for example, by a laminar flow element, and the ratio of pressure and Volume flow of the combustion air by means of a second linearization element 11 set.
- the linearization element 11 consists of the air inlet opening 12, the control 13 and the spacer 14.
- both linearization methods are coordinated such that a constant ratio of gas quantity to air volume over a relatively large Modulation area is achieved in the mixing chamber 10. This can be a simple and inexpensive gas mixing device 1 can be provided.
- the characteristic of the linearization element 11 can be determined by the geometry of the tongue, their stiffness, influenced by material and thickness, as well as by the height of the Spacer 14 can be adjusted.
- the gas mixing device 1 can also as be executed adjustable device. It is the control 13 with active components in operative connection.
- Fig. 6 shows an embodiment in which formed on the spring Sheet metal strip of the control 13, a permanent magnet 16 is mounted. In In the immediate vicinity of an electromagnet 15 is arranged, of a control current is flowed through. Depending on the height of the control current can be a different Force exerted on the permanent magnet 16. This force affects the Position of the control element 13, whereby the cross-sectional area at the Air inlet opening 12 can be changed. This allows the targeted Mixing ratio of gas and air can be adjusted.
- the active component for example, the electromagnet 15 can also with the Control 13 and be connected to a passive element,
- the permanent magnet 16 are in operative connection.
- a Air ratio control are established by the output signal of the sensor Control element is supplied and the output signal of the control element of the active components, for example, the electromagnet 15 is supplied.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
Description
- Fig. 1
- eine vereinfachte Ausführung der Gasmischvorrichtung für einen Gasbrenner gemäß dem Stand der Technik
- Fig. 2
- eine Gasmischvorrichtung für einen Gasbrenner gemäß dem Stand der Technik
- Fig. 3
- eine vereinfachte Ausführung der Gasmischvorrichtung für einen Gasbrenner gemäß der Erfindung
- Fig. 4
- eine Gasmischvorrichtung für einen Gasbrenner gemäß der Erfindung
- Fig. 5
- in schematischer Darstellung ein Linearisierungselement
- Fig. 6
- in schematischer Darstellung das Linearisierungselement in einer verstellbaren Ausführungsvariante
Claims (13)
- Gasmischvorrichtung (1) für einen Gasbrenner (50), bestehend aus einer Gasarmatur (30), die über eine Gaszuleitung (40) mit einem Mischraum (10) verbunden ist, welcher mindestens eine Lufteintrittsöffnung (12) aufweist, und ein Gebläse (20), welches mit der Eingangsseite der Lufteintrittsöffnung (12) in Verbindung steht oder welches mit der Ausgangsseite des Mischraumes (10) und einem Brenner (50) verbunden ist,
dadurch gekennzeichnet, dass in der Gaszuleitung (40) ein Linearisierungselement (41) angeordnet ist und an dem Mischraum (10) ein mindestens weiteres Linearisierungselement (11) für die Luftzufuhr angeordnet ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass das Linearisierungselement (41) als laminares Flow-Element ausgebildet ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass das Linearisierungselement (11) als Lufteintrittsöffnung (12) mit dahinter angebrachtem Steuerelement (13) ausgebildet ist. - Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, dass das Steuerelement (13) als dauerelastische Zunge ausgebildet ist, die mittels eines Abstandhalters (14) in dem Mischraum (10) in Richtung der Luftströmung hinter der Lufteintrittsöffnung (12) angeordnet ist. - Vorrichtung nach einem der Ansprüche 3 oder 4,
dadurch gekennzeichnet, dass das Steuerelement (13) aus dünnem Blech, vorzugsweise aus Federstahl ausgebildet ist. - Vorrichtung nach einem der Ansprüche 3 bis 5,
dadurch gekennzeichnet, dass das Steuerelement (13) mit einer aktiven Komponente in Wirkverbindung steht. - Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet, dass an das Steuerelement (13) ein Dauermagnet (16) angebracht ist, der in Wirkverbindung mit einem Elektromagneten (15) steht. - Verfahren zum Betrieb einer Mischvorrichtung für einen Gasbrenner mit einem Mischraum (10), die über ein Gebläse (20) mit dem Brenner (50) verbunden ist,
dadurch gekennzeichnet, dass das Verhältnis von Druck und Volumenstrom in der Gaszuleitung (40) durch ein Linearisierungselement (41) linearisiert wird und der Luftstrom in den Mischraum (10) durch mindestens ein Linearisierungselement (11) linearisiert wird. - Verfahren nach Anspruch 8,
dadurch gekennzeichnet, dass die Linearisierung des Verhältnisses von Druck und Volumenstrom am Linearisierungselement (11) erfolgt, indem sich das Steuerelement (13) bei zunehmender Strömung derart biegt, dass sich der Querschnitt der Lufteintrittsöffnung (12) vergrößert. - Verfahren nach Anspruch 8 oder 9,
dadurch gekennzeichnet, dass die Linearisierung des Verhältnisses von Druck und Volumenstrom am Linearisierungselement (11) auf die Linearisierung des Verhältnisses von Druck und Volumenstrom am Linearisierungselement (41) in der Gaszuleitung (40) derart abgestimmt wird, dass ein konstantes Verhältnis von Gasmenge zu Luftmenge in dem Mischraum (10) erreicht wird. - Verfahren nach mindestens einem der Ansprüche 8 bis 10,
dadurch gekennzeichnet, dass mittels eines Steuerstromes die Kraft des Elektromagneten (15) auf den Dauermagneten (16) derart eingestellt wird, dass durch die Querschnittsänderung der Lufteintrittsöffnung (12) das Verhältnis von Gasmenge und Luftmenge gezielt verändert wird. - Verfahren nach Anspruch 11,
dadurch gekennzeichnet, dass die Gasmischvorrichtung (1) einen Sensor zur Bestimmung der Luftzahl (Lambda) aufweist und das Ausgangssignal des Sensors einem Regelelement zugeführt und das Ausgangssignal des Regelelementes dem Elektromagneten (15) zugeführt wird. - Verfahren nach Anspruch 11 oder 12,
dadurch gekennzeichnet, dass die durch die Induktionswirkung des Dauermagneten (16) in der Magnetspule des Elektromagneten (15) induzierte Spannung zur Dämpfung von Schwingungen des Steuerelementes (13) benutzt wird oder Brennerschwingungen detektiert werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10326267 | 2003-06-11 | ||
| DE2003126267 DE10326267B4 (de) | 2003-06-11 | 2003-06-11 | Gasmischvorrichtung für einen Gasbrenner und Verfahren zum Betreiben derselben |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1486727A1 true EP1486727A1 (de) | 2004-12-15 |
| EP1486727B1 EP1486727B1 (de) | 2011-12-07 |
Family
ID=33185739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040013066 Expired - Lifetime EP1486727B1 (de) | 2003-06-11 | 2004-06-03 | Gasmischvorrichtung für einen Gasbrenner |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1486727B1 (de) |
| DE (1) | DE10326267B4 (de) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058640A1 (en) * | 2006-11-14 | 2008-05-22 | Sit La Precisa S.P.A. | Method for controlling the delivery of a combustible air-gas mixture to a burner device |
| WO2008135030A3 (de) * | 2007-05-08 | 2009-11-12 | Saia-Burgess Dresden Gmbh | Kombinierte lüfter-/gasventileinheit |
| EP2824390A4 (de) * | 2012-03-05 | 2015-04-01 | Kyungdong Navien Co Ltd | Gas-luftmischvorrichtung für verbrennungsvorrichtung |
| ES2717144A1 (es) * | 2017-12-19 | 2019-06-19 | Villaverde David Diaz | Dispositivo optimizador de la combustion de un gas |
| EP3608591A1 (de) * | 2014-02-12 | 2020-02-12 | C.I.B. Unigas S.p.A. | Brenner |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4443052A1 (de) | 2023-04-03 | 2024-10-09 | Vaillant GmbH | Heizgerät und verwendung eines verbindungselementes |
| DE102023109211A1 (de) * | 2023-04-03 | 2024-10-10 | Vaillant Gmbh | Heizgerät und Verwendung eines Verbindungselementes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0616169A1 (de) * | 1993-03-19 | 1994-09-21 | Körting Hannover Ag | Luftdrosselungseinrichtung für Gebläsebrenner, insbesondere für mehrstufige Brenner |
| DE19749510A1 (de) | 1997-11-08 | 1999-05-12 | Buderus Heiztechnik Gmbh | Mischeinrichtung |
| DE19918901C1 (de) * | 1999-04-26 | 2001-05-03 | Franz Durst | Vorrichtung zur Einstellung des Oxydationsmittel/Brennstoffgemisches in der Zuleitung eines Brenners |
| EP1099906A1 (de) * | 1999-11-11 | 2001-05-16 | Robert Bosch Gmbh | Heizgerät mit einem durch ein Brennstoff-Luftgemisch gespeisten Brenner |
| DE10011707A1 (de) | 2000-03-10 | 2001-10-11 | Bosch Gmbh Robert | Gas-Therme mit einer Gas/Luft-Verbundregelung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4039676C1 (en) * | 1990-10-22 | 1992-01-30 | Kutzner + Weber Gmbh, 8031 Maisach, De | Draught control flap for flue - incorporates counterbalance weight and brake to prevent sudden movements |
| DE19921045B4 (de) * | 1998-07-16 | 2008-02-14 | Dreizler, Ulrich, Dipl.-Ing. | Brenner zur Verbrennung von flüssigen und/oder gasförmigen Brennstoffen in Feuerungsanlagen |
-
2003
- 2003-06-11 DE DE2003126267 patent/DE10326267B4/de not_active Expired - Fee Related
-
2004
- 2004-06-03 EP EP20040013066 patent/EP1486727B1/de not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0616169A1 (de) * | 1993-03-19 | 1994-09-21 | Körting Hannover Ag | Luftdrosselungseinrichtung für Gebläsebrenner, insbesondere für mehrstufige Brenner |
| DE19749510A1 (de) | 1997-11-08 | 1999-05-12 | Buderus Heiztechnik Gmbh | Mischeinrichtung |
| DE19918901C1 (de) * | 1999-04-26 | 2001-05-03 | Franz Durst | Vorrichtung zur Einstellung des Oxydationsmittel/Brennstoffgemisches in der Zuleitung eines Brenners |
| EP1099906A1 (de) * | 1999-11-11 | 2001-05-16 | Robert Bosch Gmbh | Heizgerät mit einem durch ein Brennstoff-Luftgemisch gespeisten Brenner |
| DE10011707A1 (de) | 2000-03-10 | 2001-10-11 | Bosch Gmbh Robert | Gas-Therme mit einer Gas/Luft-Verbundregelung |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058640A1 (en) * | 2006-11-14 | 2008-05-22 | Sit La Precisa S.P.A. | Method for controlling the delivery of a combustible air-gas mixture to a burner device |
| WO2008135030A3 (de) * | 2007-05-08 | 2009-11-12 | Saia-Burgess Dresden Gmbh | Kombinierte lüfter-/gasventileinheit |
| US20100314469A1 (en) * | 2007-05-08 | 2010-12-16 | Thomas Roschke | Combined ventilator/gas valve unit |
| CN101680656B (zh) * | 2007-05-08 | 2012-11-14 | 斯博德累斯顿有限公司 | 组合的通风机/气阀设备 |
| EP2824390A4 (de) * | 2012-03-05 | 2015-04-01 | Kyungdong Navien Co Ltd | Gas-luftmischvorrichtung für verbrennungsvorrichtung |
| EP3608591A1 (de) * | 2014-02-12 | 2020-02-12 | C.I.B. Unigas S.p.A. | Brenner |
| CN110894955A (zh) * | 2014-02-12 | 2020-03-20 | C.I.B.优尼瓦斯股份公司 | 燃烧器 |
| CN110894955B (zh) * | 2014-02-12 | 2022-05-10 | C.I.B.优尼瓦斯股份公司 | 燃烧器 |
| ES2717144A1 (es) * | 2017-12-19 | 2019-06-19 | Villaverde David Diaz | Dispositivo optimizador de la combustion de un gas |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10326267A1 (de) | 2005-01-20 |
| DE10326267B4 (de) | 2005-05-04 |
| EP1486727B1 (de) | 2011-12-07 |
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