EP0927855B1 - Verfahren zur Steuerung eines Gasheizgerätes und Gerät zur Durchführung des Verfahrens - Google Patents

Verfahren zur Steuerung eines Gasheizgerätes und Gerät zur Durchführung des Verfahrens Download PDF

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Publication number
EP0927855B1
EP0927855B1 EP19980403122 EP98403122A EP0927855B1 EP 0927855 B1 EP0927855 B1 EP 0927855B1 EP 19980403122 EP19980403122 EP 19980403122 EP 98403122 A EP98403122 A EP 98403122A EP 0927855 B1 EP0927855 B1 EP 0927855B1
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EP
European Patent Office
Prior art keywords
duct
heating body
evacuating
combustion
combustion gases
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.)
Expired - Lifetime
Application number
EP19980403122
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English (en)
French (fr)
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EP0927855A1 (de
Inventor
Thierry Laplace
Jean-Jacques Raidelet
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.)
Engie SA
Original Assignee
Gaz de France SA
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 Gaz de France SA filed Critical Gaz de France SA
Publication of EP0927855A1 publication Critical patent/EP0927855A1/de
Application granted granted Critical
Publication of EP0927855B1 publication Critical patent/EP0927855B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23N1/00—Regulating fuel supply
    • F23N1/04—Regulating fuel supply conjointly with air supply and with draught
    • F23N1/047—Regulating fuel supply conjointly with air supply and with draught using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L11/00—Arrangements of valves or dampers after the fire
    • F23L11/02—Arrangements of valves or dampers after the fire for reducing draught by admission of air to flues

Definitions

  • the field of the invention is that of production devices for heat with mixture of combustion air and combustible gas such as boilers for individual houses or for buildings, as well as their operating process.
  • the pressure difference applied to the terminals of the device generates an air flow through the heater.
  • This depression is detected (above a certain threshold) by an air control device the device during the safety checks carried out before each start.
  • This flow is then interpreted by the device as a simulation combustion air supply to the heater, and the appliance is not allowed to start.
  • the device is therefore characterized by a threshold flow passing through the heating element when stopped (or even a vacuum prevailing inside the flue gas exhaust pipe) beyond which cannot be started.
  • the flow through the device is reduced below the flow aforementioned threshold, in particular at start-up and when a further depression of 100 Pa is applied to the exhaust duct.
  • the invention aims to provide a solution to increase the pressure drop of the combustion by creating turbulence in the exhaust gas duct combustion, while reducing the air flow through the heating body.
  • a goal is also an easy solution to implement, little binding, and which involves little or no modification of the device, being adaptable to any type of waterproof device, in particular type C5.
  • the solution of the invention provides in particular that the movable shutter member is placed inside the bypass so that in the open position it encroaches on the duct combustion gas evacuation so as to reduce its passage section.
  • the movable member preferably include a shutter and we will choose to place this shutter the inside of the bypass pipe in its part located nearby immediately of the flue gas discharge pipe. This solution reduces the acoustic phenomena of flap flap against the walls of the bypass line, and is more efficient.
  • the movable member can be opened shutter when, before step a), a certain threshold of vacuum inside the flue gas exhaust pipe.
  • a certain threshold of vacuum inside the flue gas exhaust pipe can be opened shutter when, before step a), a certain threshold of vacuum inside the flue gas exhaust pipe.
  • step a provision may be made open the movable shutter member and leave it open as long as the air depression detected inside the exhaust gas duct combustion will be greater than about 50 Pa.
  • step b) when step b) is completed (device in operation) and that the vacuum in the duct evacuation will be attenuated, the mobile shutter member of the bypass will close so that the combustion air no longer passes to the through the latter.
  • the device will operate normally once on and the movable shutter member will not interfere with this operation.
  • This solution also prevents combustion gases from passing through the duct discharge to the supply line via the line bypass.
  • said organ shutter preferably include at least one flap which, in position open, may extend at least partially inside the duct flue gas outlet.
  • a boiler 1 of the waterproof type installed for example in a detached house.
  • This boiler 1 includes a heating body 10, in other words an enclosure supplied with combustion air via a fuel gas supply pipe 30 (by example via the town gas network) up to a burner 12 (a ramp for example) so as to produce flames 15 source of heat.
  • the combustion air is for example sucked in using a fan 20 placed upstream of the heating body 10 according to the direction of air circulation (arrows F1). Beyond this fan 20, the heating body 10 is connected to a flue 40 for evacuating combustion gases also connected to the outside of the house, typically opening onto its roof, but separate from duct 30 Power.
  • a bypass line 50 is arranged so as to be able to relation these conduits 30 and 40.
  • a movable flap 60 is placed inside this pipe 50 (see FIG. 2), in the part of the latter located most close to the exhaust duct 40, and completely closes it in its position closed (solid lines in Figure 2). This component can tilt according to the arrow to take the position illustrated in dotted lines. So in his state open the flap 60 is placed partly inside the duct 40 evacuation so as not to beat against the wall of the bypass and reduce the air flow through said exhaust duct 40 and the heater 10.
  • the flap 60 opens by itself because it is attracted by this depression.
  • This flap 60 must therefore be designed to begin to open as soon as this threshold flow is exceeded. For this, its shape and the distribution of its mass will be provided so that it sealingly closes the bypass pipe in the closed position, and so that it does not require additional means of movement to open.
  • the vacuum decreases (that is to say that the air flow circulating in the heating body decreases), and we can then turn on the device and start the combustion phase of the gas mixture.
  • the vacuum is greater than 50 Pa, the shutter remains open and the appliance is not switched on.
  • this ignition consists in the production of a spark close to the gas burner 12, for example using an electrode 100.
  • the apparatus 1 adopts a stable combustion regime and the combustion gases are evacuated using of the fan 20 in the exhaust duct 40 while continuing to supply the heating body 10 with a mixture of gases.
  • Part 60 returns then by itself under its own weight in its closed position, so that all the combustion air passes through the heating body and the exhaust gases combustion do not rise from the exhaust duct to the duct supply via the bypass line, thus avoiding polluting this air oxidizer
  • the fan can be placed downstream of the burner so as to suck in the combustion air and direct the combustion gases towards the exhaust duct.
  • the movable obturation member can take other forms. Through example, it can be two flaps in a pivoting semicircle, either in the same direction (so as to encroach on the exhaust pipe), either opposite direction to each other. It can also be a valve moving axially inside the bypass line and one of which part encroaches on the exhaust duct in the open position so increase pressure losses. Finally, it can be a membrane flexible with fine slits (made without removing material) which, in the normally closed state of the membrane, does not allow air to pass through, and which, when the membrane is curved by partially encroaching on the duct are open.
  • the two conduits 30 and 40 can also be arranged one inside the other, all by being separated (waterproof type design).
  • the conduct of bypass may consist of a hole drilled in the wall of the conduit internal (flue gas evacuation pipe), said orifice then being equipped with a shutter member such as a flap tilting around an axis. When the latter is open, the conduits are therefore connected and the vacuum inside the exhaust pipe decreases so that ability to turn on device.
  • the shutter member can be controlled electronically as a function of the depression P prevailing inside the conduit 40 for evacuating the combustion gases, and be open when a certain threshold flow rate Ps of depression is reached.
  • Means for detecting the vacuum P prevailing inside the evacuation duct can thus be connected to control means of said member (of the motor or lever type).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Air Supply (AREA)
  • Incineration Of Waste (AREA)

Claims (7)

  1. Verfahren für den Betrieb eines Gerätes (1) zur Erzeugung von Wärme unter Verwendung eines brennbaren und eines die Verbrennung bewirkenden Gases, wie z.B. eines Kessels, wobei das Gerät hierfür eine Zuführleitung (30) für die Verbrennung bewirkende Luft, eine Entleerungsleitung (40) für Verbrennungsprodukte, die von der Zuführleitung getrennt ist und im Abstand von dieser angeordnet ist, und einen Heizkörper (10) aufweist, wobei das Verfahren die folgenden Schritte aufweist:
    a) vor dem Beschicken des Heizkörpers (10) mit die Verbrennung bewirkender Luft und während das Gerät (1) zur Erzeugung von Wärme noch nicht in Betrieb ist, bringt man die Zuführleitung (30) mit für Verbrennung bewirkende Luft und die Entleerungsleitung (40) für Verbrennungsgase mittels einer Umgehungsleitung (50) in Verbindung und bringt in diese Leitung (50) eine bewegliche Verschlußeinrichtung (60) an, die sich öffnet, um einen Teil der die Verbrennung bewirkenden Luft der Zuführleitung (30) zu der Entleerungsleitung (40) hin passieren zu lassen,
    b) man beschickt den Heizkörper (10) mittels der Zuführleitung (30) mit die Verbrennung bewirkender Luft und mit brennbarem Gas,
    c) man realisiert die Zündung der gemischten Gase im Inneren des Heizkörpers (10), um sich das Gasgemisch derart entzünden zu lassen, daß die Verbrennungsphase beginnt,
    d) man setzt die Verbrennungsphase des Gemisches im Inneren des Heizkörpers (10) derart fort, daß Wärme erzeugt wird, wobei man die Verbrennungsgase durch die Entleerungsleitung (40) austreten läßt und man zugleich damit fortfährt, den Heizkörper (10) mit Gasgemisch zu beschicken,
       dadurch gekennzeichnet, daß man die bewegliche Verschlußeinrichtung (60) im Inneren der Umgehungsleitung (50) derart anbringt, daß sie in offener Position in die Entleerungsleitung (40) für die Verbrennungsgase derart eingreift, daß ihr Durchgangsquerschnitt verringert wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die bewegliche Einrichtung (60) mindestens eine Klappe (60) aufweist, wobei man diese Klappe (60) im Inneren der Umgehungsleitung (50) in ihrem Teil anbringt, der in unmittelbarer Nähe der Entleerungsleitung (40) für die Verbrennungsgase liegt.
  3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man zum Zünden des Gerätes (1) in dem Schritt a) die bewegliche Verschlußeinrichtung (60) öffnet, wenn man vor dem Schritt a) eine bestimmte Stufe Ps an Unterdruck P im Inneren der Entleerungsleitung (40) für die Verbrennungsgase überschreitet.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß man mindestens vor dem Schritt
    a) die bewegliche Verschlußeinrichtung (60) öffnet und sie geöffnet läßt, solange der Unterdruck P, den man im Inneren der Entleerungsleitung (40) für Verbrennungsgase erfaßt, größer als etwa 50 Pa ist.
  5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man, wenn der Schritt b) beendet ist, die bewegliche Verschlußeinrichtung (60) der Umgehungsleitung (50) derart wieder schließt, daß die Verbrennung bewirkende Luft nicht mehr durch diese letztere hindurchgeht.
  6. Gerät (1) zur Erzeugung von Wärme unter Verwendung eines brennbaren und eines die Verbrennung bewirkenden Gases, mit:
    einer Zuführleitung (30) für die Verbrennung bewirkende Luft,
    einer Entleerungsleitung (40) für Verbrennungsprodukte, die von der Zuführleitung getrennt und im Abstand von dieser angeordnet ist,
    einem Heizkörper (10),
    Zündungsmitteln (100) für die gemischten Gase im Inneren des Heizkörpers (10), um sich dieses Gemisch entzünden zu lassen,
    Erfassungsmitteln (90) der Flamme im Inneren des Heizkörpers (10),
    einer Umgehungsleitung (50), welche es erlaubt, die Zuführleitung (30) und die Entleerungsleitung (40) in Verbindung zu bringen,
    und einer beweglichen Verschlußeinrichtung (60) der Leitung (50), die in Ruhe geschlossen und geöffnet werden kann,
       dadurch gekennzeichnet, daß sich die Verschlußeinrichtung mindestens teilweise in das Innere der Entleerungsleitung (40) für Verbrennungsgase erstreckt, wenn sie sich in geöffneter Position befindet, um ihren Durchgangsquerschnitt zu verringern.
  7. Gerät nach Anspruch 6, dadurch gekennzeichnet, daß die Verschlußeinrichtung (60) mindestens eine Klappe (60) aufweist, die im Inneren der Umgehungsleitung (50) in dem Teil derselben angeordnet ist, welcher der Entleerungsleitung (40) für die Verbrennungsgase am nächsten liegt.
EP19980403122 1998-01-05 1998-12-10 Verfahren zur Steuerung eines Gasheizgerätes und Gerät zur Durchführung des Verfahrens Expired - Lifetime EP0927855B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9800021A FR2773389B1 (fr) 1998-01-05 1998-01-05 Procede de fonctionnement d'un appareil de production de chaleur a melange de gaz, et appareil pour la mise en oeuvre de ce procede
FR9800021 1998-01-05

Publications (2)

Publication Number Publication Date
EP0927855A1 EP0927855A1 (de) 1999-07-07
EP0927855B1 true EP0927855B1 (de) 2003-03-19

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EP19980403122 Expired - Lifetime EP0927855B1 (de) 1998-01-05 1998-12-10 Verfahren zur Steuerung eines Gasheizgerätes und Gerät zur Durchführung des Verfahrens

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EP (1) EP0927855B1 (de)
ES (1) ES2194289T3 (de)
FR (1) FR2773389B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1021174C2 (nl) * 2002-07-29 2004-01-30 Itho B V Luchtbehandelings- en verwarmingsinstallatie.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5012793A (en) * 1989-10-05 1991-05-07 The Field Controls Company Power vented direct vent system
AT400621B (de) * 1993-02-08 1996-02-26 Vaillant Gmbh Heizgerät
NL9400908A (nl) * 1994-06-03 1996-01-02 Muelink & Grol Bv Systeem van luchttoevoerkanaal en verbrandingsluchtafvoerkanaal in combinatie met een verbrandingshaard van het in hoofdzaak gesloten type.

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Publication number Publication date
FR2773389B1 (fr) 2000-02-11
EP0927855A1 (de) 1999-07-07
ES2194289T3 (es) 2003-11-16
FR2773389A1 (fr) 1999-07-09

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