EP0399134B1 - Burner automat - Google Patents

Burner automat Download PDF

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Publication number
EP0399134B1
EP0399134B1 EP90100288A EP90100288A EP0399134B1 EP 0399134 B1 EP0399134 B1 EP 0399134B1 EP 90100288 A EP90100288 A EP 90100288A EP 90100288 A EP90100288 A EP 90100288A EP 0399134 B1 EP0399134 B1 EP 0399134B1
Authority
EP
European Patent Office
Prior art keywords
arrangement according
automatic firing
burner
firing arrangement
flame
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
EP90100288A
Other languages
German (de)
French (fr)
Other versions
EP0399134A3 (en
EP0399134A2 (en
Inventor
Eric Agot
Josef Cerjak
Karl-Anton Wissler
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.)
Electrowatt Technology Innovation AG
Original Assignee
Landis and Gyr Betriebs AG
Landis and Gyr Bussiness Support AG
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Filing date
Publication date
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Publication of EP0399134A2 publication Critical patent/EP0399134A2/en
Publication of EP0399134A3 publication Critical patent/EP0399134A3/en
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Publication of EP0399134B1 publication Critical patent/EP0399134B1/en
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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
    • F23N1/005—Regulating fuel supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/206—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electrical or electromechanical means
    • 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
    • F23N2223/28—Timing network with more than one timing element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/38—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/20—Warning devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/26—Details

Definitions

  • the invention relates to an automatic burner control according to the preamble of claim 1.
  • Such burner controls are suitable, for example, for fully automatic commissioning and monitoring of burners.
  • a burner control of the type mentioned in the preamble of claim 1 is known for example from the publication "Oil burner controls LOA21 and LOA22" (Landis & Gyr publication 7118, August 1983).
  • a suitable thermal timer for such an oil burner control is known from DE-PS 34 43 613.
  • burners are often built so compactly that the accessibility of the reset button can be difficult. This results in the desire to be able to perform remote unlocking.
  • One possibility would be to provide an electrically excitable lifting magnet which is placed on the housing and which actuates the suppressor button.
  • Such a solution usually involves space problems and is not cheap.
  • the invention has for its object to provide an automatic burner control in which the possibility of eliminating faults not only exists on the automat itself, but can also be triggered remotely.
  • the additional possibility of remote control should not increase the volume of the apparatus and the additional manufacturing costs should be as small as possible.
  • 1 means a flame relay, which acts via a first slide 2 on a contact set 3, with which various aggregates of a burner, such as ignition transformer, burner motor and fuel valves, which are not shown, are actuated according to a predetermined time sequence.
  • the flame relay 1 is in turn actuated by a flame amplifier 4 that monitors the presence of a flame.
  • the timer 5 can be, for example, a thermal timer in which a bimetal strip is deflected by an electric heater.
  • the timer 5 is by means of the slider. 6 also controls a fault contact 7, the central connection 8 of which is connected to the phase lead L of the power supply.
  • a fault contact 7 In the first position of the fault contact 7, one of the contacts of the contact set 3 serving to control the aggregates of the burner is connected to the phase feed line L, while in the second position, which corresponds to the position shown in FIG. 1, to control the aggregates of the Burner serving contacts are disconnected from the phase feed line L so that they are deactivated. This position corresponds to the fault position.
  • the fault contact 7 is designed as a toggle contact.
  • the tilt function can be implemented, for example, by a tilt spring 9. Due to the design as a toggle contact, the fault contact 7 switches over quickly even with slow actuation by the timing element 5. Intermediate positions between the two aforementioned positions are excluded.
  • the interference contact 7 can be acted on by hand using an interference-free button 10. It is thus possible to reset the fault contact 7 from the second position to the first position, that is to say to cancel the fault position.
  • An actuating web 11 also acts on the fault contact 7. This actuating web 11 is coupled to the slider 2, so that the movement of the slider 2 caused by the armature of the flame relay 1 is also transmitted to the actuating web 11.
  • connection 12 serving to connect an alarm device is connected to the phase feed line L.
  • An interference suppressor 13 is connected to the connection 12. This interference suppressor 13 can be arranged separately from the automatic firing device at any location, for example in a control panel.
  • This interference pulse generator 13 can advantageously be constructed as follows: Between the terminal 12 and a ground terminal N there are a resistor 14, a diode 15 and a resistor 16 in series, the diode 15 being poled so that a current from the phase feed line L in the direction Ground connection N can flow, but not vice versa.
  • a capacitor 17, which is advantageously an electrolytic capacitor, is connected in parallel with the resistor 16.
  • a further resistor 18 is connected to the connection point of diode 15, resistor 16 and capacitor 17 and a pushbutton switch 19 is connected to it.
  • the electrical connection of the flame relay 1 takes place on the one hand via a resistor 21 and a connection to the fault contact 7 to the phase supply line L, on the other hand via the series connection of a resistor 22 with a diode 23 to the ground supply line N.
  • connection of the pushbutton switch 19 facing away from the resistor 18 is connected to the connection point between the flame relay 1 and the resistor 21.
  • An optical indicator 25 can advantageously be connected between the connection point of resistor 18 and pushbutton switch 19 and the ground lead N via a series resistor 24.
  • the optical indicator can be a glow lamp, for example.
  • the timer 5 is started, for example, by a higher-level controller.
  • the slide 6 is moved by the timing element 5, as a result of which the individual contacts of the contact set 3 are controlled in accordance with a predetermined sequence so that the normal commissioning process for the burner runs out. If a flame appears after a predetermined period of time, the flame amplifier 4 reports this flame and actuates the flame relay 1. At the same time, the timer 5 is stopped and brought into its starting position.
  • the flame relay 1 is not actuated and the timer 5 is not stopped.
  • the slide 6 is thus moved further until the fault contact 7 finally switches from the first to the second position.
  • the various units of the burner are thus disconnected from the phase feed line L, thus de-energized and consequently switched off.
  • the potential of the phase feed line L is now at the terminal 12.
  • the capacitor 17 is now up to a peak voltage U s charged, the size of which depends largely on the two resistors 14 and 16.
  • the optical indicator 25 is thus across the resistors 18 and 24 at the peak voltage U s and is excited thereby, so that it indicates the fault position of the burner control.
  • the flame relay 1 is excited by actuating the pushbutton switch 19.
  • the movement of the slide 2 caused by the armature of the flame relay 1 now acts on the contact set 3, but this has no effect on the connected units of the burner, since the connection of the contact set 3 to the phase feed line L is interrupted.
  • the movement of the slide 2 is simultaneously transmitted via the actuating web 11 to the fault contact 7, which thereby tilts back into the first position.
  • the terminal 12 is again separated from the phase feed line L, so that the capacitor 17 is no longer charged.
  • the voltage on the capacitor 17 drops quickly and the flame relay 1 drops out again.
  • the duration of the activation of the flame relay 1 does not depend on the duration of the actuation of the key switch 19, but on the size of the electrical energy stored in the capacitor 17.
  • the actuating web 11 is coupled to the slide 2.
  • the coupling of the actuating web 11 to the slide 2 offers the advantage that only a single part, namely the slide 2, acts directly on the armature of the flame relay 1. A possibly asymmetrical loading of the armature by counter forces of different sizes of the parts to be moved by the armature is also avoided in this way.
  • the end of the actuating web 11 (FIG. 2) facing the slider 2 is advantageous to form the end of the actuating web 11 (FIG. 2) facing the slider 2 as two resilient arms 31 and on the opposite inner sides of these arms 31 and on the To provide the surface of the slide 2 locking elements 32.
  • the locking elements 32 can have the shape of teeth.
  • the locking elements 32 are shown as teeth with a triangular profile, the two flanks forming the same angle against the reference plane. Any other tooth shapes are also possible. It is particularly advantageous to design the locking elements 32 as saw teeth, the steep tooth flanks of which are arranged such that the steep tooth flanks of the connecting partners press against one another in the pressure load occurring during the movement transmission. This asymmetrical tooth shape achieves an increased self-locking effect.

Description

Die Erfindung bezieht sich auf einen Feuerungsautomaten gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an automatic burner control according to the preamble of claim 1.

Solche Feuerungsautomaten eignen sich beispielsweise zur vollautomatischen Inbetriebsetzung und Überwachung von Brennern.Such burner controls are suitable, for example, for fully automatic commissioning and monitoring of burners.

Ein Feuerungsautomat der im Oberbegriff des Anspruchs 1 genannten Art ist beispielsweise aus der Druckschrift "Oelfeuerungsautomaten LOA21 und LOA22" (Landis & Gyr-Druckschrift 7118, August 1983) bekannt. Ein für einen solchen Ölfeuerungsautomaten geeignetes thermisches Zeitglied ist aus der DE-PS 34 43 613 bekannt.A burner control of the type mentioned in the preamble of claim 1 is known for example from the publication "Oil burner controls LOA21 and LOA22" (Landis & Gyr publication 7118, August 1983). A suitable thermal timer for such an oil burner control is known from DE-PS 34 43 613.

Wenn der Feuerungsautomat beispielsweise durch Ausbleiben der Flammenbildung auf Störung schaltet, dann werden dabei alle mit den Aggregaten des Brenners verbundenen Kontaktsätze vom Netz getrennt. Gleichzeitig erscheint an einem zusätzlichen Kontakt ein Spannungssignal, mit dem eine Alarmeinrichtung aktiviert werden kann. Zur Wiederinbetriebnahme ist es dann erforderlich, die Störungsursache zu beseitigen und anschließend den Feuerungsautomaten zu entstören. Dazu ist ein Entstörknopf vorhanden, der mechanisch auf den zusätzlichen Kontakt wirkt. Die Alarmeinrichtung wird damit wieder spannungslos gemacht und die mit den Aggregaten des Brenners verbundenen Kontaktsätze erhalten wieder Spannung.If, for example, the burner control unit switches to malfunction due to the absence of flame formation, all contact sets connected to the burner units are disconnected from the mains. At the same time, a voltage signal appears on an additional contact with which an alarm device can be activated. To restart, it is then necessary to eliminate the cause of the fault and then to suppress the burner control. There is an interference suppressor button that acts mechanically on the additional contact. The alarm device is thus de-energized again and the contact sets connected to the units of the burner are energized again.

Durch die zunehmende Miniaturisierung sind Brenner oftmals so kompakt gebaut, daß die Zugänglichkeit des Entstörknopfes erschwert sein kann. Daraus resultiert der Wunsch, eine Fernentriegelung vornehmen zu können. Eine Möglichkeit wäre, einen auf das Gehäuse aufgesetzten elektrisch erregbaren Hubmagneten vorzusehen, der den Entstörknopf betätigt. Eine solche Lösung beinhaltet jedoch meist Raumbedarfsprobleme und ist nicht billig.Due to the increasing miniaturization, burners are often built so compactly that the accessibility of the reset button can be difficult. This results in the desire to be able to perform remote unlocking. One possibility would be to provide an electrically excitable lifting magnet which is placed on the housing and which actuates the suppressor button. However, such a solution usually involves space problems and is not cheap.

Der Erfindung liegt die Aufgabe zugrunde, einen Feuerungsautomaten zu schaffen, bei dem die Möglichkeit der Störungsbeseitigung nicht nur am Automaten selbst besteht, sondern auch ferngesteuert ausgelöst werden kann. Durch die zusätzliche Möglichkeit der Fernsteuerung soll sich das Apparatevolumen nicht vergrößern und die zusätzlichen Herstellungskosten sollen möglichst klein sein.The invention has for its object to provide an automatic burner control in which the possibility of eliminating faults not only exists on the automat itself, but can also be triggered remotely. The additional possibility of remote control should not increase the volume of the apparatus and the additional manufacturing costs should be as small as possible.

Die genannte Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.According to the invention, the stated object is achieved by the features of claim 1. Advantageous refinements result from the subclaims.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to the drawing.

Es zeigen:

Fig. 1
ein Schema eines Feuerungsautomaten,
Fig. 2
einen justierbar mit einem Schieber verbundenen Betätigungssteg,
Fig. 3a und 3b
Aufsicht und Seitenansicht eines Schiebers und
Fig. 4a und 4b
Aufsicht und Seitenansicht eines Betätigungsstegs.
Show it:
Fig. 1
a schematic of a burner control,
Fig. 2
an actuating web, which can be adjusted with a slide,
3a and 3b
Top view and side view of a slide and
4a and 4b
Top and side view of an actuating bridge.

In der Fig. 1 bedeutet 1 ein Flammenrelais, das über einen ersten Schieber 2 auf einen Kontaktsatz 3 wirkt, mit dem verschiedene nicht dargestellte Aggregate eines Brenners, wie Zündtransformator, Brennermotor und Brennstoffventile, gemäß einer vorgegebenen Zeitfolge angesteuert werden. Das Flammenrelais 1 wird seinerseits von einem das Vorhandensein einer Flamme überwachenden Flammenverstärker 4 betätigt. Ein Zeitglied 5, das bei der Inbetriebsetzung durch einen nicht darstellten Regler gestartet wird, wirkt mittels eines zweiten Schiebers 6 ebenfalls auf den Kontaktsatz 3 ein. Das Zeitglied 5 kann beispielsweise ein thermisches Zeitglied sein, bei dem durch eine elektrische Heizung ein Bimetallstreifen ausgelenkt wird.In FIG. 1, 1 means a flame relay, which acts via a first slide 2 on a contact set 3, with which various aggregates of a burner, such as ignition transformer, burner motor and fuel valves, which are not shown, are actuated according to a predetermined time sequence. The flame relay 1 is in turn actuated by a flame amplifier 4 that monitors the presence of a flame. A timer 5, which is started during commissioning by a controller (not shown), also acts on the contact set 3 by means of a second slide 6. The timer 5 can be, for example, a thermal timer in which a bimetal strip is deflected by an electric heater.

Vom Zeitglied 5 wird mittels des Schiebers. 6 auch ein Störungskontakt 7 gesteuert, dessen mittlerer Anschluß 8 mit der Phasenzuleitung L der Stromversorgung verbunden ist. In der ersten Lage des Störungskontaktes 7 ist einer der der Ansteuerung der Aggregate des Brenners dienenden Kontakte des Kontaktsatzes 3 mit der Phasenzuleitung L verbunden, während in der zweiten Lage, die der in der Fig. 1 dargestellten Position entspricht, die der Ansteuerung der Aggregate des Brenners dienenden Kontakte von der Phasenzuleitung L abgetrennt sind, so daß sie außer Betrieb gesetzt sind. Diese Position entspricht der Störstellung.The timer 5 is by means of the slider. 6 also controls a fault contact 7, the central connection 8 of which is connected to the phase lead L of the power supply. In the first position of the fault contact 7, one of the contacts of the contact set 3 serving to control the aggregates of the burner is connected to the phase feed line L, while in the second position, which corresponds to the position shown in FIG. 1, to control the aggregates of the Burner serving contacts are disconnected from the phase feed line L so that they are deactivated. This position corresponds to the fault position.

Der Störungskontakt 7 ist als Kippkontakt ausgebildet. Die Kippfunktion kann beispielsweise durch eine Kippfeder 9 verwirklicht sein. Durch die Ausführung als Kippkontakt schaltet der Störungskontakt 7 auch bei langsamer Betätigung durch das Zeitglied 5 rasch um. Zwischenstellungen zwischen den beiden vorgenannten Lagen sind dadurch ausgeschlossen.The fault contact 7 is designed as a toggle contact. The tilt function can be implemented, for example, by a tilt spring 9. Due to the design as a toggle contact, the fault contact 7 switches over quickly even with slow actuation by the timing element 5. Intermediate positions between the two aforementioned positions are excluded.

Auf den Störungskontakt 7 kann mittels eines Entstörknopfes 10 von Hand eingewirkt werden. Damit ist es möglich, den Störungskontakt 7 von der zweiten Lage in die erste Lage zurückzusetzen, also die Störstellung aufzuheben.The interference contact 7 can be acted on by hand using an interference-free button 10. It is thus possible to reset the fault contact 7 from the second position to the first position, that is to say to cancel the fault position.

Auf den Störungskontakt 7 wirkt außerdem ein Betätigungssteg 11 ein. Dieser Betätigungsteg 11 ist mit dem Schieber 2 gekoppelt, so daß die durch den Anker des Flammenrelais 1 verursachte Bewegung des Schiebers 2 auch auf den Betätigungssteg 11 übertragen wird.An actuating web 11 also acts on the fault contact 7. This actuating web 11 is coupled to the slider 2, so that the movement of the slider 2 caused by the armature of the flame relay 1 is also transmitted to the actuating web 11.

In der Störstellung des Störungskontaktes 7 ist ein dem Anschluß einer Alarmeinrichtung dienender Anschluß 12 mit der Phasenzuleitung L verbunden. Damit kann die Störung des Feuerungsautomaten nach außen signalisiert werden. An den Anschluß 12 ist ein Entstörimpulsgeber 13 angeschlossen. Dieser Entstörimpulsgeber 13 kann getrennt vom Feuerungsautomaten an einem beliebigen Ort angeordnet werden, beispielsweise in einer Schalttafel.In the fault position of the fault contact 7, a connection 12 serving to connect an alarm device is connected to the phase feed line L. This means that the fault in the burner control can be signaled to the outside. An interference suppressor 13 is connected to the connection 12. This interference suppressor 13 can be arranged separately from the automatic firing device at any location, for example in a control panel.

Dieser Entstörimpulsgeber 13 kann vorteilhaft wie folgt aufgebaut sein: Zwischen dem Anschluß 12 und einem Massenanschluß N liegen ein Widerstand 14, eine Diode 15 und ein Widerstand 16 in Reihe, wobei die Diode 15 so gepolt ist, daß ein Strom von der Phasenzuleitung L in Richtung Massenanschluß N fließen kann, aber nicht umgekehrt. Parallel zum Widerstand 16 liegt ein Kondensator 17, der vorteilhaft ein Elektrolytkondensator ist. An den Verbindungspunkt von Diode 15, Widerstand 16 und Kondensator 17 ist ein weiterer Widerstand 18 angeschlossen und daran ein Tastschalter 19.This interference pulse generator 13 can advantageously be constructed as follows: Between the terminal 12 and a ground terminal N there are a resistor 14, a diode 15 and a resistor 16 in series, the diode 15 being poled so that a current from the phase feed line L in the direction Ground connection N can flow, but not vice versa. A capacitor 17, which is advantageously an electrolytic capacitor, is connected in parallel with the resistor 16. A further resistor 18 is connected to the connection point of diode 15, resistor 16 and capacitor 17 and a pushbutton switch 19 is connected to it.

Der elektrische Anschluß des Flammenrelais 1 erfolgt einerseits über einen Widerstand 21 und eine Verbindung zum Störungskontakt 7 an die Phasenzuleitung L, andererseits über die Serieschaltung eines Widerstands 22 mit einer Diode 23 an die Massenzuleitung N.The electrical connection of the flame relay 1 takes place on the one hand via a resistor 21 and a connection to the fault contact 7 to the phase supply line L, on the other hand via the series connection of a resistor 22 with a diode 23 to the ground supply line N.

Der dem Widerstand 18 abgewandte Anschluß des Tastschalters 19 ist mit dem Verbindungspunkt zwischen dem Flammenrelais 1 und dem Widerstand 21 verbunden.The connection of the pushbutton switch 19 facing away from the resistor 18 is connected to the connection point between the flame relay 1 and the resistor 21.

Zwischen den Verbindungspunkt von Widerstand 18 und Tastschalter 19 und der Massenzuleitung N kann vorteilhaft über einen Vorwiderstand 24 ein optischer Indikator 25 angeschlossen sein. Der optische Indikator kann beispielsweise eine Glimmlampe sein.An optical indicator 25 can advantageously be connected between the connection point of resistor 18 and pushbutton switch 19 and the ground lead N via a series resistor 24. The optical indicator can be a glow lamp, for example.

Nachfolgend wird die Funktion der beschriebenen Vorrichtung erläutert. Wenn der an den Feuerungsautomaten angeschlossene Brenner gestartet wird, so wird beispielsweise von einem übergeordneten Regler das Zeitglied 5 gestartet. Durch das Zeitglied 5 wird der Schieber 6 bewegt, wodurch die einzelnen Kontakte des Kontaktsatzes 3 gemäß einem vorgegebenen Ablauf so gesteuert werden, daß der normale Inbetriebsetzungsvorgang für den Brenner abläuft. Erscheint nach einer vorgegebenen Zeitspanne eine Flamme, so meldet der Flammenverstärker 4 diese Flamme und betätigt das Flammenrelais 1. Gleichzeitig wird das Zeitglied 5 gestoppt und in seine Ausgangslage gebracht.The function of the device described is explained below. When the burner connected to the burner control is started, the timer 5 is started, for example, by a higher-level controller. The slide 6 is moved by the timing element 5, as a result of which the individual contacts of the contact set 3 are controlled in accordance with a predetermined sequence so that the normal commissioning process for the burner runs out. If a flame appears after a predetermined period of time, the flame amplifier 4 reports this flame and actuates the flame relay 1. At the same time, the timer 5 is stopped and brought into its starting position.

Erscheint innerhalb der vorgegebenen Zeitspanne die Flamme jedoch nicht, so wird das Flammenrelais 1 nicht betätigt und das Zeitglied 5 nicht gestoppt. Damit wird der Schieber 6 weiter bewegt, bis schließlich der Störungskontakt 7 von der ersten in die zweite Lage umschaltet. Die verschiedenen Aggregate des Brenners sind damit von der Phasenzuleitung L getrennt, somit spannungslos und folglich abgeschaltet.However, if the flame does not appear within the specified period of time, the flame relay 1 is not actuated and the timer 5 is not stopped. The slide 6 is thus moved further until the fault contact 7 finally switches from the first to the second position. The various units of the burner are thus disconnected from the phase feed line L, thus de-energized and consequently switched off.

Durch das Umschalten des Störungskontaktes in die in der Fig. 1 dargestellte zweite Lage, die der Störstellung entspricht, liegt nun am Anschluß 12 das Potential der Phasenzuleitung L. Über den Widerstand 14 und die Diode 15 wird nun der Kondensator 17 bis auf eine Scheitelspannung Us aufgeladen, deren Größe wesentlich von den beiden Widerständen 14 und 16 abhängt.By switching the fault contact into the second position shown in FIG. 1, which corresponds to the fault position, the potential of the phase feed line L is now at the terminal 12. Via the resistor 14 and the diode 15, the capacitor 17 is now up to a peak voltage U s charged, the size of which depends largely on the two resistors 14 and 16.

Der optische Indikator 25 liegt damit über die Widerstände 18 und 24 an der Scheitelspannung Us und wird dadurch erregt, so daß er die Störstellung des Feuerungsautomaten anzeigt.The optical indicator 25 is thus across the resistors 18 and 24 at the peak voltage U s and is excited thereby, so that it indicates the fault position of the burner control.

Durch eine Betätigung des Tastschalters 19 wird das Flammenrelais 1 erregt. Die durch den Anker des Flamenrelais 1 bewirkte Bewegung des Schiebers 2 wirkt nun zwar auf den Kontaktsatz 3 ein, jedoch bleibt das auf die angeschlossenen Aggregate des Brenners ohne Wirkung, da die Verbindung des Kontaktsatzes 3 mit der Phasenzuleitung L unterbrochen ist. Die Bewegung des Schiebers 2 wird gleichzeitig über den Betätigungssteg 11 auf den Störungskontakt 7 übertragen, der dadurch in die erste Lage zurückkippt. Durch dieses Zurückkippen wird der Anschluß 12 wieder von der Phasenzuleitung L getrennt, so daß der Kondensator 17 nicht mehr geladen wird. Durch die Entladung des Kondensators 17 über den Widerstand 18 und die Wicklung des Flammenrelais 1 und außerdem über den Widerstand 24 und den optischen Indikator 25 sinkt die Spannung am Kondensator 17 schnell ab und das Flammenrelais 1 fällt wieder ab. Die Dauer des Anziehens des Flammenrelais 1 hängt dabei nicht von der Dauer der Betätigung des Tastschalters 19 ab, sondern von der Größe der im Kondensator 17 gespeicherten elektrischen Energie.The flame relay 1 is excited by actuating the pushbutton switch 19. The movement of the slide 2 caused by the armature of the flame relay 1 now acts on the contact set 3, but this has no effect on the connected units of the burner, since the connection of the contact set 3 to the phase feed line L is interrupted. The movement of the slide 2 is simultaneously transmitted via the actuating web 11 to the fault contact 7, which thereby tilts back into the first position. As a result of this tilting back, the terminal 12 is again separated from the phase feed line L, so that the capacitor 17 is no longer charged. By discharging the capacitor 17 via the resistor 18 and the winding of the flame relay 1 and also via the resistor 24 and the optical indicator 25, the voltage on the capacitor 17 drops quickly and the flame relay 1 drops out again. The duration of the activation of the flame relay 1 does not depend on the duration of the actuation of the key switch 19, but on the size of the electrical energy stored in the capacitor 17.

Wie bereits erwähnt, ist der Betätigungssteg 11 mit dem Schieber 2 gekoppelt. Die Kopplung des Betätigungsstegs 11 an den Schieber 2 bietet den Vorteil, daß am Anker des Flammenrelais 1 nur ein einziges Teil, nämlich der Schieber 2, direkt angreift. Eine möglicherweise asymmetrische Belastung des Ankers durch unterschiedlich große Gegenkräfte der vom Anker zu bewegenden Teile wird so ebenfalls vermieden.As already mentioned, the actuating web 11 is coupled to the slide 2. The coupling of the actuating web 11 to the slide 2 offers the advantage that only a single part, namely the slide 2, acts directly on the armature of the flame relay 1. A possibly asymmetrical loading of the armature by counter forces of different sizes of the parts to be moved by the armature is also avoided in this way.

Es ist vorteilhaft, die Koppelung so auszugestalten, daß der Betätigungssteg 11 gegenüber dem Schieber 2 justierbar ist. An die Stelle der heiklen Justage des Kippsystems für den Störungskontakt 7 tritt damit die einfach auszuführende Justage der Koppelung.It is advantageous to design the coupling so that the actuating web 11 is adjustable relative to the slide 2. Instead of the delicate adjustment of the tilting system for the fault contact 7, the simple adjustment of the coupling thus takes place.

Um die Verbindung von Betätigungssteg 11 und Schieber 2 justierbar zu gestalten, ist es vorteilhaft, das dem Schieber 2 zugewandte Ende des Betätigungsstegs 11 (Fig. 2) als zwei federnde Arme 31 auszubilden und an den sich gegenüber liegenden Innenseiten dieser Arme 31 und auf der Oberfläche des Schiebers 2 Rastelemente 32 vorzusehen. Die Rastelemente 32 können die Form von Zähnen haben.In order to make the connection of the actuating web 11 and slider 2 adjustable, it is advantageous to form the end of the actuating web 11 (FIG. 2) facing the slider 2 as two resilient arms 31 and on the opposite inner sides of these arms 31 and on the To provide the surface of the slide 2 locking elements 32. The locking elements 32 can have the shape of teeth.

Um eine Justage in feinen Schritten vornehmen zu können, ist es vorteilhaft, auf beiden Oberflächen des Schiebers 2 (Fig. 3a und 3b) je zwei Reihen 33a und 33b bzw. 33c und 33d von Rastelementen 32 vorzusehen, wobei die einzelnen Reihen um jeweils ein Viertel der Teilung T gegeneinander versetzt sind, und das dem Schieber 2 zugewandte Ende des Betätigungsstegs 11 (Fig. 4) so auszubilden, daß zwei Paare von federnden Armen 31 vorhanden sind, deren gegenüber liegende Innenseiten ebensolche Reihen von Rastelementen 32 tragen, die aber gegeneinander nicht versetzt sind. Beispielsweise ist am Schieber 2 die zweite Reihe 33b gegenüber der ersten Reihe 33a um T/4 versetzt, die dritte Reihe 33c gegenüber der ersten Reihe 33a um T/2 und die vierte Reihe 33d gegenüber der dritten Reihe 33c wiederum um T/4. Durch eine solche Anordnung sind Justageschritte von einem Viertel der Teilung T möglich.In order to be able to carry out an adjustment in fine steps, it is advantageous to provide two rows 33a and 33b or 33c and 33d of latching elements 32 on both surfaces of the slide 2 (FIGS. 3a and 3b), the individual rows being one at a time Quarter of the pitch T are offset from one another, and the slide 2 facing the end of the actuating web 11 (Fig. 4) so that there are two pairs of resilient arms 31, the opposite inner sides of which also carry such rows of locking elements 32, but against each other are not offset. For example, on slide 2, second row 33b is offset by T / 4 from first row 33a, the third Row 33c compared to the first row 33a by T / 2 and the fourth row 33d compared to the third row 33c again by T / 4. With such an arrangement, adjustment steps of a quarter of the pitch T are possible.

In den Fig. 2 bis 4 sind die Rastelemente 32 als Zähne mit einem dreieckigen Profil dargestellt, wobei die beiden Flanken gleiche Winkel gegen die Bezugsebene bilden. Daneben sind beliebige andere Zahnformen möglich. Besonders vorteilhaft ist die Ausbildung der Rastelemente 32 als Sägezähne, deren steile Zahnflanken so angeordnet sind, daß bei der bei der Bewegungsübertragung auftretenden Druckbelastung jeweils die steilen Zahnflanken der Verbindungspartner gegeneinander drücken. Durch diese asymmetrische Zahnform wird ein verstärkter Selbsthemmungseffekt erreicht.2 to 4, the locking elements 32 are shown as teeth with a triangular profile, the two flanks forming the same angle against the reference plane. Any other tooth shapes are also possible. It is particularly advantageous to design the locking elements 32 as saw teeth, the steep tooth flanks of which are arranged such that the steep tooth flanks of the connecting partners press against one another in the pressure load occurring during the movement transmission. This asymmetrical tooth shape achieves an increased self-locking effect.

Claims (7)

  1. An automatic firing arrangement having a flame relay (1) actuable by the appearance of a flame and a timing member (5) which controls the time sequence of closure of individual contacts (3) with which units of a burner are controlled, wherein in the event of a sequence which is not in accordance with the timing program a fault contact (7) switches from a first into a second position, wherein in the first position the contacts which serve to control the units of the burner are connected to voltage while in the second position they are voltage-less and in said second position voltage is applied to a terminal (12) for an alarm device, characterised in that connected to the terminal (12) is a fault clearing pulse generator (13) which manually actuated can produce a pulse, that the flame relay (1) is excitable by means of said pulse, whereby the flame relay (1) is temporarily operated, and that there is an actuating leg (11) which is actuated by the armature of the flame relay (1) and which switches the fault contact (7) from the second position into the first position.
  2. An automatic firing arrangement according to claim 1 characterised in that the fault clearing pulse generator (13) substantially comprises a chargeable capacitor (17) and a push-button switch (19).
  3. An automatic firing arrangement according to claim 1 or claim 2 characterised in that the actuating leg (11) is coupled to a slider (2) of the flame relay (1).
  4. An automatic firing arrangement according to claim 3 characterised in that the position of the actuating leg (11) relative to the slider (2) is adjustable.
  5. An automatic firing arrangement according to claim 4 characterised in that detent elements (32) are provided on arms (31) of the actuating leg (11) and on surface portions of the slider (2).
  6. An automatic firing arrangement according to claim 5 characterised in that the detent elements (32) are in the form of teeth.
  7. An automatic firing arrangement according to claim 6 characterised in that the tooth flanks of the detent elements (32) are asymmetrical, wherein the steeper tooth flank faces towards the other co-operating member of the connection.
EP90100288A 1989-05-24 1990-01-08 Burner automat Expired - Lifetime EP0399134B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1946/89 1989-05-24
CH194689 1989-05-24

Publications (3)

Publication Number Publication Date
EP0399134A2 EP0399134A2 (en) 1990-11-28
EP0399134A3 EP0399134A3 (en) 1991-01-30
EP0399134B1 true EP0399134B1 (en) 1993-05-26

Family

ID=4222292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100288A Expired - Lifetime EP0399134B1 (en) 1989-05-24 1990-01-08 Burner automat

Country Status (3)

Country Link
EP (1) EP0399134B1 (en)
DE (1) DE59001538D1 (en)
DK (1) DK0399134T3 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB858149A (en) * 1958-03-19 1961-01-04 Rheostatic Co Ltd Improvements in fuel control means
US3923445A (en) * 1974-04-10 1975-12-02 Robertshaw Controls Co Burner ignition system having safety switch with remote reset
CH604085A5 (en) * 1976-07-27 1978-08-31 Landis & Gyr Ag
FR2385985A1 (en) * 1977-03-30 1978-10-27 Euroflex Gas burner flame failure control system - includes relay controlling gas supply valve, flame monitor, timer, ionisation element and alarm

Also Published As

Publication number Publication date
DE59001538D1 (en) 1993-07-01
EP0399134A3 (en) 1991-01-30
DK0399134T3 (en) 1993-10-04
EP0399134A2 (en) 1990-11-28

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