EP1126218A2 - Soupape à gaz et automate à brûleur pour un brûleur à gaz - Google Patents

Soupape à gaz et automate à brûleur pour un brûleur à gaz Download PDF

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Publication number
EP1126218A2
EP1126218A2 EP00124282A EP00124282A EP1126218A2 EP 1126218 A2 EP1126218 A2 EP 1126218A2 EP 00124282 A EP00124282 A EP 00124282A EP 00124282 A EP00124282 A EP 00124282A EP 1126218 A2 EP1126218 A2 EP 1126218A2
Authority
EP
European Patent Office
Prior art keywords
valve
gas
drive device
delay time
burner
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Withdrawn
Application number
EP00124282A
Other languages
German (de)
English (en)
Other versions
EP1126218A3 (fr
Inventor
Hans-Jochen Dr. Schwarz
Claus Löw
Gerhard Waha
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.)
SCHWARZ HANS JOCHEN DR
Original Assignee
SCHWARZ HANS JOCHEN DR
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
Application filed by SCHWARZ HANS JOCHEN DR filed Critical SCHWARZ HANS JOCHEN DR
Publication of EP1126218A2 publication Critical patent/EP1126218A2/fr
Publication of EP1126218A3 publication Critical patent/EP1126218A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/22—Timing network
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/02—Fail safe using electric energy accumulators
    • 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
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details

Definitions

  • the invention relates to a gas servo valve, in particular to control gas burners operated only temporarily, as well as a corresponding burner control and a method for igniting a gas burner, especially for Instantaneous water heater.
  • Gas appliances often have burners that are used for adjustment to a fluctuating heat requirement or to an only sporadically occurring heat requirement only temporarily operate. You must therefore if heat is needed is present again and again. Need for this the gas burner is an ignition source, such as an ignition flame.
  • the pilot flame provides sufficient ignition energy to ignite a gas flame on the main burner, before large gas accumulations have formed. It it turns out, however, that the reduction in ignition energy, which is desirable for reasons of gas consumption, or the transition to electrical ignition, the even lower Ignition energies delivers, to smaller deflagrations on the Main burner.
  • Gas valves are known to operate in response to a Open and close the electrical control signal.
  • E.g. is a gas servo valve is known from EP 0665396, in which the valve actuation movement by a diaphragm actuator is generated by compressed air. To generate the compressed air serves a diaphragm pump. The control of the diaphragm drive takes place via a solenoid-operated changeover valve, regardless of gas pressure. This valve can be used for gas Channel blocked and released. On the Ignition on a burner is not affected.
  • This task is done with a gas servo valve according to claim 1, and a gas burner control according to claim 7 or a method for igniting a gas burner solved according to claim 9.
  • the gas servo valve according to the invention has a drive device to actuate its valve closure member on by an electrically controlled pilot control valve is controlled. This allows the gas servo valve opened in response to an electrical start signal and be closed.
  • the drive device of the gas servo valve now has a delay device, with the opening movement of the valve closure member slowed down at least by a given delay time becomes.
  • the design or dimensioning of the delay device influences the timing of the Valve opening movement (time control). This will make it Gas servo valve not opened abruptly, but slowly, with which the gas flow to be switched on initially only up to a small amount is gradually released.
  • the delay device does not necessarily have to be a gradual one Control the increase in gas volume, but can also first let a restricted gas flow through until one Ignition is detected or a delay time has expired and the gas flow is released completely. On in this way, the next burner becomes an ignition process only released a limited amount of gas, so that no large accumulations of ignitable mixture can form. It becomes a so-called hard ignition of the burner avoided.
  • an electrical, preferably battery powered Spark generator operating within the delay time of the Slowdown device emits multiple sparks.
  • the gas flow can pass through the decelerator initially limited to a constant low value and only fully after ignition or after a specified time be released. It is also possible to change the amount of gas ramped from a first during the firing interval Increase value to a second value. Likewise are gradual increases possible.
  • valve closure member of the gas servo valve not only for opening and closing of the gas-carrying main channel of the gas servo valve, but also used for throttling during the ignition phase.
  • separate throttle device to be provided depending on from the position of the valve stem of the gas servo valve a sensitive, gradually decreasing throttling of the Causes gas flow. After the delay time has elapsed then the gas flow is released almost suddenly in the end, so that the ignition is very quick receive. This can cause a sudden need for heat be met accordingly quickly.
  • the connection of the throttle body to the valve stem enables the entire movement path of the valve spindle, that go through when the gas servo valve is opened is, in a relatively large, by the valve stem the effect of the slowdown device passed slowly first section of the route in which throttling occurs, and a second, comparatively smaller section of the path split up in that when he's equally slow how the first section of the route is traversed, one sudden release of the already partially permeable Gas servo valve causes. It is therefore sufficient if the deceleration device influences the drive device in such a way that when you open the gas servo valve, essentially braking or decelerating independently of the path movement of the valve stem.
  • a simple and robust solution is for a differential pressure controlled Gas servo valve that the differential pressure between the upstream and downstream sides, thereby to achieve that at least one of the main channel connecting channel leading to the drive device at least one throttling means is provided.
  • Prefers will be two throttling means, which at the two ends of the Connection channel are arranged. This allows the structure the differential pressure in the drive device and the Opening movement of the valve spindle is deliberately slowed down become.
  • connection channel through the valve stem guided and opens into a throttle opening Mouth on the valve stem can also Mouth with the developing on the throttle body Flow interact. That way is an additional one Interaction achievable. Throttles the throttle body the gas flow is still relatively strong, the flow is at the Mouth of the connecting channel is also slow, which means the build-up of the differential pressure in the drive device slowly going on.
  • the speed at the End of the valve stem, at which the mouth of the connecting channel can increase in such a way that the Accelerated build-up of the differential pressure in the drive device and the gas servo valve opens quickly, i.e. the speed of movement of the valve spindle on the last part of their stroke, which is no longer throttling, but the full release of the valve is assigned to increase significantly.
  • Throttle means prevented, especially in the Release of the connection channel to initiate the gradual Opening the gas servo valve, a sudden drop in pressure in the drive device and thus one too quick opening.
  • valve plate of the throttle body can then be a Have central opening on a conical section the valve stem is seated.
  • the annular gap thus formed forms a throttle point, the width of the annular gap from the Relative position of the valve plate of the throttle element in Is dependent on the valve stem.
  • valve stem instead of the conical end the valve stem also other forms, such as graded, sections cylindrical and other shapes application Find.
  • spark generation begins preferably with time or as required also shortly before the gas servo valve starts to open, that, as mentioned, initially takes place slowly goes.
  • Gas valve let the gas volume below a limit limited. Within this delay time, the initially severe throttling is gradually reduced, so that the amount of gas let through from its initial value within the delay time about double or triples in value. This value is preferred still much smaller than the maximum gas flow with completely released valve. It is preferably located below 1/4 to 1/5 of the maximum value.
  • FIG 1 is a water heater in schematic form 1 illustrates the water in one Heating coil 2 is heated by means of a burner 3.
  • the burner 3 is ignited and controlled by an automatic burner control 4, to which at least one gas servo valve 5, a Water switch 6, a control unit 7, an ignition generator 8 and an ignition electrode 9 and an ionization sensor 10 belong to flame monitoring.
  • the gas servo valve 5 has a pilot control valve 12 by an electromagnetic Drive 14 is actuated. This is over a line 15 with a corresponding output 16 of the Control unit connected.
  • the output provides a digital signal, i.e. a signal that has two states - valve on, Valve closed - differentiates (switching signal).
  • the drive 14 can excite two states, de-energized - assume and two positions of the pilot control valve Specify 12.
  • This is a directional valve to Control (alternate release) of two channels 17, 18, which are used to control a diaphragm drive 19.
  • This in turn forms a drive device for actuation, i.e. for controlled opening and closing of a Throttle valve 20.
  • the diaphragm drive 19 has a housing 21 which divided by a membrane 22 into two working chambers 23, 24 is.
  • a valve spindle 25 connected, which, as can be seen from Figures 2 and 3, on their one end of the membrane 22 with a rubber seal provided valve plate 26 as a valve closure member and a second, on the valve stem 25 axially slidably mounted valve plate 27 as a throttle element wearing.
  • the valve plates 27, 28 act with corresponding Valve seats 29, 30 together which have a valve opening 31 surround.
  • the valve opening 31 is in an intermediate wall formed a valve housing 32 through which a main channel 33 leads. This leads to the burner 3 ( Figure 1) and supplies it with gas when the throttle valve 20 is open.
  • connection channel 34 leads from the pilot control valve 12 a connecting channel 34 in the main channel 33.
  • the connecting channel 34 leads through the valve spindle 25 to an orifice 35, which refers to a through Arrows P indicated flow direction on the outflow side of the throttle valve 20 is arranged.
  • a constriction 36 formed as a throttling means serves.
  • a nozzle 37 with a further constriction 38 is inserted, which serves as another throttling device.
  • the connection channel 34 has the pilot control valve 12 a rocker 39 on one end carries a sealing cap 41.
  • the rocker 39 is by means of a spring 42 biased to a rest position, in the the sealing cap 41 closes the nozzle 37 and thus shuts off the connecting channel 34.
  • the rocker 39 carries a second one Sealing cap 43, which has a nozzle 44 with a large passage width assigned. This belongs to an overflow channel 45, which, when it comes from the sealing cap 43 is released, the working chambers 23, 24 with each other connects.
  • the working chamber 24 is also one Pressurizing channel 46 with the inflow side of the Through channel 33 connected.
  • the pressurization channel 46 can by a surrounding the valve stem 25 Through connection should be formed.
  • this is from the valve plate 26 formed valve closure member by a Compression spring 48 biased towards its closed position.
  • the compression spring 48 surrounds the valve stem and is supported on an inner annular shoulder 49, which is in a through hole 51 of a tubular neck 52 is formed is that of a double-shell structure shown in FIG. 2 or 4 Housing 21 of the diaphragm drive 19 belongs. With the other end of the compression spring 48 is supported on the Valve plate 26 from.
  • the valve spindle 25 extends through the valve plate 26 with an extension 54 through which the connecting channel 34 leads and the constriction 36 is arranged.
  • the extension 54 is conical on its outside at least in sections, with cylindrical sections being present in particular at the beginning and at the end.
  • the extension protrudes 54 a central opening 55 of the valve plate 27, which is preferably hat-shaped. Its hat-shaped inner part defines an interior 56 in which the mouth 35 of the connecting channel 34 is located.
  • the diameter of the central opening 55 is slightly larger than the largest diameter of the extension 54.
  • An annular gap 57 is thus defined between the outer surface of the extension 54 and the central opening 55, the gap width of which depends on the axial position of the extension 54.
  • the valve disk 27 is biased towards its end position by a compression spring 58 which is comparatively softer in relation to the compression spring 48, in which it is pressed against a stop means located directly in the vicinity of the mouth 35, for example a retaining ring.
  • the compression spring 58 is supported at one end on the valve plate 27 and at the other end on the valve plate 26.
  • the following dimensions for determining the gas starting quantity have proven to be expedient dimensions: Central aperture diameter 55 2.9mm (liquid gas) 3.3mm (natural gas) Outside diameter of the extension 54 at the front 2.8mm Annular gap width 0.05mm (liquid gas) 0.25mm (natural gas) Diameter of throat 38 0.3mm Narrow 36 diameter 0.7mm
  • the ignition generator 4 also includes the ignition generator 8, which is connected via a line 61 to an output 62 the control unit 7 is connected.
  • the ignition generator 8 are electrical at the ignition electrode 9, for sparking leading impulses when it is on line 61 a corresponding control signal from the control unit 7 receives.
  • the control unit 7 is also via a line 63 connected to the ionization sensor 10 to the presence or the absence of a flame on the burner 3 to be able to record.
  • the control unit 7 receives at its input 64 a line 65 a signal from the water switch 6, the indicates whether the water flow in a water pipe 66, which leads to the heating coil 2, exceeded a limit has or not.
  • a tap connected downstream of the heating coil 2 is now opened, a water flow suddenly begins, as illustrated in FIG. 5 starting at t 0 .
  • the sudden increase in the water flow reaches a threshold value S after a very short time and exceeds it at a time t 1 .
  • the water switch 6 responds, ie the signal emitted by the water switch suddenly changes its value, as can be seen from FIG. 5.
  • the control unit 7 now carries out a system check, in particular a check of the functionality of the ionization sensor and that in the associated circuit part, this check being completed at a point in time A. At this time A, a corresponding activation signal is given via line 61 to the ignition generator 8, which begins to output ignition pulses Z.
  • the working chambers 23, 24 have been connected to one another by the overflow channel 45 and have been pressurized via the pressurizing channel 46 with the same pressure that is present on the inflow side of the closed gas servo valve 5.
  • gas can now flow from the working chamber 23 through the throttle formed by the constriction 38 into the connecting channel 34, which is under the lower pressure on the outflow side of the gas servo valve 5.
  • the valve plate 27, which, as can be seen in FIG.
  • valve plate 27 thus still blocks the through-channel 33, although the valve plate 26 has already lifted off its valve seat 29. However (now (at the end of t 2 )) a small amount of gas can flow through the annular gap in the through opening of the valve plate 27.
  • FIG. 5 the conditions that are now established are indicated by a differential pressure curve.
  • This shows the differential pressure on a measuring orifice and is therefore proportional to the square of the gas flow.
  • t 2 curve I
  • the pressure in the working chamber 23 can now be gradually reduced to the downstream pressure of the gas servo valve 5, throttled by the constrictions 38, 36.
  • the pressure difference between the working chambers 23, 24 increases, whereby the valve spindle 25, slowed by the throttles formed by the narrow spaces 38, 36, moves away from the valve seats 30, 31.
  • the annular gap between the extension 54 and the valve plate 27 still resting on the valve seat 30 thus becomes increasingly larger, as a result of which the gas flow is gradually increased. This is indicated in Figure 5 by curve section II.
  • the control unit 7 can be a function of one Ionization signal of the ionization sensor 10 or time-controlled turn off the ignition generator 8. Besides, can they close the gas servo valve 5 immediately if none Flame is detected. When closing the gas servo valve 5, the connecting channel 34 is closed and the Overflow channel 45 released. This contains no throttling agent, so the pressure equalization between the working chambers 23, 24 takes place almost instantaneously. The Gas servo valve 5 closes very quickly.
  • a gas servo valve 5 for an automatic burner control 4 has a pilot control valve 12. This controls you Connection channel 34 for actuating a diaphragm drive 12. This causes a slow opening movement and a rapid closing movement of the gas servo valve 5.
  • the valve spindle 25 of the gas servo valve 5 carries a valve closure member 26 and a throttle body 27, the gas flow through the main channel 33 of the gas servo valve 5 at one slow opening movement of the valve spindle 25 initially from a first limited value to a second larger one, however, still gradually increasing in value releases and only after passing this throttle path fully releases the gas flow. It becomes an ignition a burner 3 with low gas flow and yet a rapid increase in the power of the ignited flame from its initial value to the target value.
EP00124282A 2000-02-15 2000-11-14 Soupape à gaz et automate à brûleur pour un brûleur à gaz Withdrawn EP1126218A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10006600 2000-02-15
DE10006600A DE10006600B4 (de) 2000-02-15 2000-02-15 Gasventil und Verfahren zum Betrieb eines Gasventils

Publications (2)

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EP1126218A2 true EP1126218A2 (fr) 2001-08-22
EP1126218A3 EP1126218A3 (fr) 2003-09-24

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EP00124282A Withdrawn EP1126218A3 (fr) 2000-02-15 2000-11-14 Soupape à gaz et automate à brûleur pour un brûleur à gaz

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EP (1) EP1126218A3 (fr)
DE (1) DE10006600B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1715229A3 (fr) * 2005-04-22 2007-06-20 Karl Dungs GmbH & Co.KG Dispositif de soupape
EP2014979A3 (fr) * 2007-07-12 2014-03-05 Karl Dungs GmbH & Co.KG Dispositif de fonctionnement pour un brûleur de surface haute performance et son procédé de fonctionnement
CN116498799A (zh) * 2023-06-25 2023-07-28 成都川力智能流体设备股份有限公司 一种户用智能全效安全装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10200273A1 (de) * 2002-01-07 2003-07-24 Dungs Karl Gmbh & Co Kg Elektrisch gesteuertes Gasventil
DE102022101002A1 (de) 2022-01-17 2023-07-20 Ebm-Papst Landshut Gmbh Hauptmengenventil zur zweistufigen Einstellung einer Hauptmenge eines zu einem Brenner strömenden Gases
DE102022102753A1 (de) 2022-02-07 2023-08-10 Vaillant Gmbh Verfahren zur Inbetriebnahme eines Heizgerätes, Computerprogramm, Regel- und Steuergerät, Heizgerät und Verwendung einer Drosseleinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665396A1 (fr) 1994-01-29 1995-08-02 Karl Dungs GmbH & Co. Soupape à commande pneumatique avec alimentation indépendante d'air comprimé

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US4060370A (en) * 1975-10-02 1977-11-29 Emerson Electric Co. Manifold gas valve with stepped flow operation
DE2917584A1 (de) * 1978-05-31 1979-12-13 Main Gas Appliances Ltd Automatischer gasbrenner
DE2906044C2 (de) * 1979-02-14 1983-08-25 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gasdruckregler für eine gasbeheizte Wärmequelle
DE3234296A1 (de) * 1982-09-16 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Gasarmatur, insbesondere fuer heizoefen und heizkessel
US4850530A (en) * 1987-12-15 1989-07-25 Johnson Service Company Gas valve using modular construction
DE3906312C1 (fr) * 1989-02-28 1989-12-21 Man Nutzfahrzeuge Ag, 8000 Muenchen, De
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FR2730794B1 (fr) * 1995-02-21 1997-04-25 Sdecc Mecanisme gaz pour chauffe-bains a gaz sans veilleuse permanente a commande electronique
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Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0665396A1 (fr) 1994-01-29 1995-08-02 Karl Dungs GmbH & Co. Soupape à commande pneumatique avec alimentation indépendante d'air comprimé

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1715229A3 (fr) * 2005-04-22 2007-06-20 Karl Dungs GmbH & Co.KG Dispositif de soupape
CN100472109C (zh) * 2005-04-22 2009-03-25 卡尔·邓格斯有限责任两合公司 带有压电控制机构的阀装置
US7520487B2 (en) 2005-04-22 2009-04-21 Karl Dungs Gmbh & Co. Kg Valve arrangement with piezoelectric control
EP2113696A3 (fr) * 2005-04-22 2010-06-02 Karl Dungs GmbH & Co.KG Dispositif de soupape
EP2014979A3 (fr) * 2007-07-12 2014-03-05 Karl Dungs GmbH & Co.KG Dispositif de fonctionnement pour un brûleur de surface haute performance et son procédé de fonctionnement
CN116498799A (zh) * 2023-06-25 2023-07-28 成都川力智能流体设备股份有限公司 一种户用智能全效安全装置
CN116498799B (zh) * 2023-06-25 2023-08-29 成都川力智能流体设备股份有限公司 一种户用智能全效安全装置

Also Published As

Publication number Publication date
EP1126218A3 (fr) 2003-09-24
DE10006600B4 (de) 2004-02-26
DE10006600A1 (de) 2001-08-23

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