EP0866270A2 - Gasheizgerät, insbesondere für Wassererhitzer - Google Patents
Gasheizgerät, insbesondere für Wassererhitzer Download PDFInfo
- Publication number
- EP0866270A2 EP0866270A2 EP97121200A EP97121200A EP0866270A2 EP 0866270 A2 EP0866270 A2 EP 0866270A2 EP 97121200 A EP97121200 A EP 97121200A EP 97121200 A EP97121200 A EP 97121200A EP 0866270 A2 EP0866270 A2 EP 0866270A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- air
- combustion
- individual
- fuel 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.)
- Granted
Links
Images
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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/045—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
-
- 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, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
- F23N2005/181—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
- F23N2225/06—Measuring pressure for determining flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/18—Groups of two or more valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/20—Membrane valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/02—Controlling two or more burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/20—Controlling one or more bypass conduits
Definitions
- the invention is based on a gas heater, in particular for water heaters, according to the genus of the main claim.
- a gas heater in particular for water heaters, according to the genus of the main claim.
- a trained Premix burner 44 46 945 A1
- This Arrangement is relatively complex and because of not inevitable allocation of air to the individual Firing zones also prone to condensation in one Heat exchanger and in the exhaust gas path.
- features of the main claim have the advantage that separate control valves in the gas individual lines omitted and due to the controlled supply of air to the individual burning zones the tendency to form condensate in the Heat exchanger and in the exhaust gas path is reduced.
- the Air supply to the non-activated burning zones remains fully maintained, creating the dew point of the exhaust gases increased and the risk of condensation largely is avoided.
- the air volume flow conveyed derived control pressure for the gas / air compound controller and thus its flawless function remain in the Partial load range of the premix burner fully preserved.
- the dependence of the gas control pressure on the gas volume flow to minimize or to switch off will continue proposed that the gas individual lines in one with the Output of the gas / air compound regulator connected pressure chamber begin and one the output pressure to a control element of the Controller leading reference line from one leads flow-free area of the pressure chamber. This ensures that only changes to the static Pressure conditions on the outlet side of the gas / air compound controller be recorded and corrected.
- the pressure chamber can in the Integrated controller or as an independent component be trained.
- a throttle device is provided in the individual gas lines Adjustment of the slope of the gas / air characteristic curve arranged.
- the gas / air composite controller can be advantageous Be adapted to the corresponding system.
- the gas heater can be used with different Gas types are operated.
- the heater has a blower 10, the combustion air over an air shaft 12 feeds a premix burner 14. over this is a combustion chamber 16 which is arranged at the top a heat exchanger 18 for in a line network 20 running water is complete.
- the premix burner 14 is divided into four burning zones 22, which the air over Individual channels 24a, b, c, d is supplied.
- the individual channels 24 are separated by partition walls 26 in the air shaft 12 divided.
- partition walls 28 Formation of chamber areas 30a, b, c, d provided with the individual channels 24 and the firing zones 22 correspond and based on the height of the burnout path.
- the fuel gas is the heater via a main line 32 and a device 34 shown in more detail in Figure 2 for Controlling and regulating the performance of the premix burner 14 and of the gas / air ratio.
- the device 34 has two safety valves 36, 38 and connected downstream a gas pressure regulator 40 of known type, the control pressure is guided by a pneumatic composite actuator 42. This detects those dependent on the air volume flow conveyed Pressure difference between measuring points 44, 46, of which the one, 44, in the air shaft 12 in front of a constriction 48 and the other, 46, downstream of the constriction in the single channel 24d is arranged.
- the compound actuator 42 acts as known on a servo control valve 50 of the gas pressure regulator 40 and is with this and with the two safety valves 36, 38, as indicated in the drawing, to a gas-air composite fitting 52 structurally summarized.
- the output of the gas pressure regulator 40 is via a line 54 connected to a pressure chamber 56, from the individual lines 58a, b, c, d to in the individual channels 24 of the air shaft 12 arranged gas nozzles 60 lead.
- a Reference line 62 At one Flow-reduced area of the pressure chamber 56 is one Reference line 62 connected, which the static Pressure ratios at the controller outlet in a control chamber of the Servo control valve 50 transmits.
- the individual lines 58 is an electromagnetically operated open / close valve 64 installed and each individual line 58 leads via a adjustable throttle device 66, its function below using the characteristic curve image according to FIG. 3 is explained.
- the ordinate shows the difference between the regulated gas pressure p BR and the pressure p 2 at the measuring point 46, that is to say the excess pressure with which the gas reaches the respective individual channel 24 forming the mixing chamber.
- the operating behavior according to line a results when the gas flows unthrottled through the throttle device 66. By narrowing the through opening in the throttle device 66, the dashed lines b, c and d result, the distance e representing the possible range of the ratio setting.
- the pressure chamber 56, the on / off valves 64 and optionally throttle devices 66 could also be used with the Gas / air composite fitting 52 structurally summarized or in these be integrated.
- the individual combustion zones 22 both the air and the gas are fed separately, whereby a good one in the individual channels 24 of the air shaft 12 Mixing of the two combustion components takes place.
- the individual channels 24 have the function of premixing chambers, the combustion zones 22 of the premix burner 14 individually assigned. While the firing zone 22d is permanently activated, the remaining firing zones 22a, b, c either individually or in groups via the on / off valves 64 can be switched on. It is also about the individual air channels not pressurized 24 conveyed air mixes with the exhaust gases downstream of the heat exchanger 18 and raises their dew point.
- the partitions 28 in the Combustion chamber 16 prevent mixed areas of air with a gas mixture that has not yet completely burned.
- the power or Control range of the heater can be expanded because also in lower performance range due to the air admixture Tendency to form condensate is largely avoided.
- a Extending the control range is also facilitated or enabled because the detected between the measuring points 44, 46 Control pressure regardless of the number of activated Firing zones 22, i.e. decisive for all performance levels of the Premix burner 14 is.
- Switching individual on and off Firing zones 22 with unchanged air volume can the do not change the amount of gas supplied to active combustion zones 22, because only changes in the static in the pressure chamber 56 Pressures are detected and regulated by the gas pressure regulator 40.
- the throttle devices 66 can be used for each one Firing zone 22 fine tunes the gas / air ratio made with changing air delivery of the fan 10 will.
Landscapes
- 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)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
Claims (4)
- Gas-Heizgerät, insbesondere für Wassererhitzer, mit einem Vormischbrenner, der zum Zweck der Leistungsstufung in einzeln aktivierbare Brennzonen aufgeteilt ist, denen die Verbrennungsluft gemeinsam durch ein Gebläse und das Brenngas geregelt über je eine Einzelleitung zugeführt sind, gekennzeichnet durch folgende Merkmale:a) die Verbrennungsluft ist wie das Brenngas jeder Brennzone (22a, b, c, d) über einen Einzelkanal (24a, b, d, d) zugeführt,b) in einer alle Brenngas-Einzelleitungen (58a, b, c, d) speisenden Hauptleitung (32) ist ein vom Luftvolumenstrom gesteuerter Gas/Luft-Verbundregler (52) eingebaut,c) zum Zu- und Abschalten der Gaszufuhr zu einzelnen Brennzonen (22a, b, c, d) sind in den betreffenden Brenngas-Einzelleitungen (58a, b, c, d) Auf/Zu-Ventile (64) vorgesehen.
- Heizgerät nach Anspruch 1, dadurch gekennzeichnet, daß auch in der Brennkammer (16) Einzelkanäle (30a, b, c, d) gebildet sind, die mit den Einzelkanälen (24a, b, c, d) im Luftschacht (12), bzw. mit den Brennzonen (22 a, b, c, d) korrespondieren und deren Höhe sich an der Ausbrandstrecke orientiert.
- Heizgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Brenngas-Einzelleitungen (58 a, b, c, d) in einer mit dem Ausgang des Gas/Luft-Verbundreglers (52) verbundenen Druckkammer (56) beginnen und eine den Ausgangsdruck an ein Steuerglied (50) des Reglers leitende Referenzleitung (62) aus einem strömungsberuhigten Bereich der Druckkammer (56) herausführt.
- Heizgerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in jeder Brenngas-Einzelleitung (58a, b, c, d) eine Drosseleinrichtung (66) zur Einstellung der Steigung der Gas/Luft-Kennlinie angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19711151 | 1997-03-18 | ||
DE19711151A DE19711151A1 (de) | 1997-03-18 | 1997-03-18 | Gasheizgerät, insbesondere für Wassererhitzer |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0866270A2 true EP0866270A2 (de) | 1998-09-23 |
EP0866270A3 EP0866270A3 (de) | 1999-08-18 |
EP0866270B1 EP0866270B1 (de) | 2003-05-28 |
Family
ID=7823716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97121200A Expired - Lifetime EP0866270B1 (de) | 1997-03-18 | 1997-12-03 | Gasheizgerät, insbesondere für Wassererhitzer |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0866270B1 (de) |
DE (2) | DE19711151A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000063616A2 (en) * | 1999-04-19 | 2000-10-26 | North American Manufacturing Company | Premix burner with firing rate control |
EP1083386A1 (de) * | 1999-09-09 | 2001-03-14 | Giorgio Scanferla | Brennerbaueinheit und Brennerkopf zur Gasmischungsverbrennung |
WO2002095294A1 (en) | 2001-05-18 | 2002-11-28 | Furigas Assen B.V. | Non condensing premix gas burners |
US7494337B2 (en) * | 2004-04-22 | 2009-02-24 | Thomas & Betts International, Inc. | Apparatus and method for providing multiple stages of fuel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4446945A1 (de) | 1994-12-28 | 1996-07-04 | Abb Management Ag | Gasbetriebener Vormischbrenner |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE910585C (de) * | 1951-08-01 | 1954-05-03 | Richard Huelzer | Gasbeheizter Fluessigkeits-Durchlauferhitzer |
JPS58182031A (ja) * | 1982-04-16 | 1983-10-24 | Matsushita Electric Ind Co Ltd | 燃焼制御装置 |
JP3060730B2 (ja) * | 1992-06-30 | 2000-07-10 | 株式会社ノーリツ | 燃焼装置 |
JPH09264526A (ja) * | 1996-03-26 | 1997-10-07 | Tokyo Gas Co Ltd | 交番燃焼システム |
-
1997
- 1997-03-18 DE DE19711151A patent/DE19711151A1/de not_active Withdrawn
- 1997-12-03 DE DE59710173T patent/DE59710173D1/de not_active Expired - Fee Related
- 1997-12-03 EP EP97121200A patent/EP0866270B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4446945A1 (de) | 1994-12-28 | 1996-07-04 | Abb Management Ag | Gasbetriebener Vormischbrenner |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000063616A2 (en) * | 1999-04-19 | 2000-10-26 | North American Manufacturing Company | Premix burner with firing rate control |
WO2000063616A3 (en) * | 1999-04-19 | 2001-02-22 | North American Mfg | Premix burner with firing rate control |
US6312250B1 (en) | 1999-04-19 | 2001-11-06 | North American Manufacturing Company | Premix burner with firing rate control |
EP1083386A1 (de) * | 1999-09-09 | 2001-03-14 | Giorgio Scanferla | Brennerbaueinheit und Brennerkopf zur Gasmischungsverbrennung |
WO2002095294A1 (en) | 2001-05-18 | 2002-11-28 | Furigas Assen B.V. | Non condensing premix gas burners |
US7494337B2 (en) * | 2004-04-22 | 2009-02-24 | Thomas & Betts International, Inc. | Apparatus and method for providing multiple stages of fuel |
Also Published As
Publication number | Publication date |
---|---|
DE19711151A1 (de) | 1998-09-24 |
EP0866270B1 (de) | 2003-05-28 |
EP0866270A3 (de) | 1999-08-18 |
DE59710173D1 (de) | 2003-07-03 |
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