EP1182402A1 - Control circuit - Google Patents

Control circuit Download PDF

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Publication number
EP1182402A1
EP1182402A1 EP00118473A EP00118473A EP1182402A1 EP 1182402 A1 EP1182402 A1 EP 1182402A1 EP 00118473 A EP00118473 A EP 00118473A EP 00118473 A EP00118473 A EP 00118473A EP 1182402 A1 EP1182402 A1 EP 1182402A1
Authority
EP
European Patent Office
Prior art keywords
resistor
circuit
capacitor
control circuit
comparator
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
Application number
EP00118473A
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German (de)
French (fr)
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EP1182402B1 (en
Inventor
Derk Vegter
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.)
Garrett Motion SARL
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Honeywell BV
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Publication date
Application filed by Honeywell BV filed Critical Honeywell BV
Priority to ES00118473T priority Critical patent/ES2209736T3/en
Priority to EP00118473A priority patent/EP1182402B1/en
Priority to AT00118473T priority patent/ATE259045T1/en
Priority to DE50005207T priority patent/DE50005207D1/en
Priority to PT00118473T priority patent/PT1182402E/en
Publication of EP1182402A1 publication Critical patent/EP1182402A1/en
Application granted granted Critical
Publication of EP1182402B1 publication Critical patent/EP1182402B1/en
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    • 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
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic 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
    • F23N2005/182—Air flow switch
    • 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
    • F23N2223/26—Timing network with capacitors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/32—Igniting for a predetermined number of cycles

Definitions

  • the invention relates to a control circuit according to the preamble of claim 1.
  • Control circuits according to the prior art are known from EP-0 698 767 B1 and EP-0 855 755 B1 known.
  • the control circuit according to EP-0 855 755 B1 is an advantageous one Further development of the control circuit according to EP-0 698 767 B1.
  • the control circuit according to EP-0 855 755 B1 is used in gas burners with fan support Application.
  • the control circuit according to EP-0 855 755 B1 is not Modifiable in that it is the same for atmospheric gas burners Gas burners without fan support could be used. So in the EP patent application 00102821.1 proposed a control circuit, both in gas burners with blower support as well as with atmospheric gas burners can.
  • the problem underlying the present invention is that of a novel control circuit create that is inexpensive to manufacture.
  • a relay RY2 has a changeover contact with NO2 make contact and NC2 normally closed contact, while the C2 contact arm on one Mains voltage line L is.
  • the relay RY2 is equipped with an electronic switch, e.g. a transistor Q2, connected in series, the control electrode to the output A one Control electronics CE is connected.
  • a circuit with a diode D1 and a Resistor R2 leads from normally open contact NO2 of relay RY2 to its field winding and via the electronic switch Q2 to the other mains voltage line N.
  • a DC voltage supply circuit from a resistor R1, a diode D8 and a parallel connection switched from a capacitor C5 and a Zener diode Z4, the parallel connection from capacitor C5 and Zener diode Z4 with diode D8 and resistor R1 in series is switched.
  • the series connection of relay RY2 and electronic switch Q2 is on the one hand Capacitor C6 and on the other hand a Zener diode Z6 connected in parallel.
  • a charging resistor R5 for the capacitor C6 engages at a connection L2 of the excitation winding of the gas valve MV on.
  • a further capacitor C1 is provided, which is between the normally open contact NO2 of the Relay RY2 and the gas valve MV is switched.
  • the capacitor C1 intervenes on the other Connection L1 of the field winding of the gas valve MV.
  • the capacitor C1 thus leads from the normally open contact NO2 of the relay RY2 to the connection L1 the field winding of the gas valve MV and the connection L2 of the field winding of the Gas valve MV is connected to capacitor C6 via charging resistor R5.
  • the input E of the control electronics CE reaches between the relay RY2 and the electronic switch Q2. However, it is also possible that the input E of the Control electronics CE above the relay RY2 - i.e. between relay RY2 and resistor R2 - attacks.
  • a circuit from a resistor R4 and one to the resistor R4 is in Series connected diode D2 in parallel to contacts NC2 and NO2 of relay RY2 connected.
  • the circuit of resistor R4 and diode D2 leads from the normally closed contact NC2 Relay RY2 via the circuit consisting of diode D1 and resistor R2 for excitation winding of the Relay RY2 and via the electronic switch Q2 to the mains voltage line N.
  • a circuit from a resistor R3 and one to the resistor R3 is in series switched diode D3 provided.
  • Resistor R3 and diode D3 are between the Normally closed contact NC2 of relay RY2 and connection L2 of the field winding of the gas valve MV switched.
  • FIG. 1 there is a blower FA between NO2 and ground potential N. connected. Is between the connection L2 of the gas valve MV and the mains voltage line N. a switch PS with contacts NO and C switched.
  • the control electronics CE of the control circuit comprises a mono-stable Timer circuit and a bi-stable hold circuit.
  • the timer circuit is formed from: a diode D9, a capacitor C7, resistors R14, R16, R6, R12, R8, R7, R10 and R17, a comparator U1 and an electronic switch Q7.
  • the hold circuit is composed of: capacitors C2 and C4, resistors R55, R44 and R47 and one Comparator U2. As can be seen in FIG. 1, the electronic switches form Q2 and Q7 together a Darlington transistor.
  • the capacitor C7 of the timer circuit is directly connected to the capacitor via the diode D9 C6 charged.
  • the timer circuit is monostable. This will achieved in that the Zener diode Z6 connected in parallel with the capacitor C6 the most Input E of the control electronics CE limited signal present. This ensures that the signal at the plus (+) input of the comparator U1 is at the minus (-) input of the comparator U1 signal normally does not exceed.
  • the timer circuit must be activated in a different way.
  • the bi-stable hold circuit is provided to activate the timer circuit. If e.g. the output signal of the comparator U2 is high, the voltage of the plus (+) - Input of the comparator U2 through the circuit of resistors R55 and R47 and the Signal + V determined. After switching on - see the so-called "power-up" signal of the figure 2 - the capacitor C4 is discharged and the comparator U2 is automatically converted into one High impedance output mode converted.
  • the voltage of the minus (-) input of the Comparator U2 is formed by the circuit of resistors R7, R6 and R12 and the signal + V determined.
  • the minus (-) input is labeled ST in FIG.
  • the ST signal is smaller than the signal of the plus (+) - Input of the comparator U2.
  • the ST signal is larger than the signal of the plus (+) - Input of the comparator U2.
  • the output signal of the comparator U2 decreases.
  • the in Capacitor C2 stores energy through electronic switch Q7 negative impulse on its emitter. Since the electronic switch Q7 is conductive, resistor R8 will further decrease the value of the ST signal.
  • the Comparator U1 is thereby converted into a high impedance output mode which electronic switch Q7 continues to conduct, electronic switch Q2 begins to conduct.
  • the Signal present at input E of control electronics CE is reduced, relay RY2 switches on and finally the fan FA and gas valve MV are activated.
  • the bi-stable hold circuit can only be reset by the Power supply is interrupted. The entire signal flow is shown in Figure 2.
  • the control circuit described above accordingly becomes an electronic holding circuit realized.
  • the result is a volatile control circuit that supports gas burners with blowers as well as with atmospheric gas burners, i.e. gas burners without fan support, can be used.
  • a start attempt of the possible to control gas burner In the control circuit described in connection with FIG. 1, a start attempt of the possible to control gas burner.
  • the control circuit according to the invention can be simple To be expanded in such a way that two start attempts are possible.
  • Fig. 3 shows one Section of the relevant components.
  • the bi-stable hold circuit only has to be doubled.
  • the components of the bi-stable hold circuit for the second Starting attempts are: capacitors C2-1 and C4-1, resistors R55-1, R44-1 and R47-1 and a comparator U2-1.
  • the output of the comparator U2-1 is with the resistor R47 connected.
  • the resistor R55-1 is parallel to the resistors R55 and R47 switched.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electronic Switches (AREA)
  • Amplifiers (AREA)
  • Control Of Stepping Motors (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Control Of Combustion (AREA)
  • Relay Circuits (AREA)
  • Selective Calling Equipment (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

The switching device includes a relay (RY2) with contacts (NC2, NO2), a capacitor (C6) with resistance (R5), an electronic switch (Q2), and a circuit with resistance (R2) and diode (D1). The control electronics (CE) include a mono-stable timer circuit (D9, C7, R14, R16, R6, R12, R8, R7, R10, R17, U1, Q7) and at least one bi-stable holding circuit (C2, C4, R55, R44, R47, U2; C2-1, C4-1, R55-1, R44-1, R47-1, U2-1).

Description

Die Erfindung betrifft eine Steuerschaltung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a control circuit according to the preamble of claim 1.

Steuerschaltungen nach dem Stand der Technik sind aus EP-0 698 767 B1 und EP-0 855 755 B1 bekannt. Die Steuerschaltung gemäß EP-0 855 755 B1 ist eine vorteilhafte Fortentwicklung der Steuerschaltung gemäß EP-0 698 767 B1.Control circuits according to the prior art are known from EP-0 698 767 B1 and EP-0 855 755 B1 known. The control circuit according to EP-0 855 755 B1 is an advantageous one Further development of the control circuit according to EP-0 698 767 B1.

Die Steuerschaltung gemäß EP-0 855 755 B1 findet bei Gasbrennern mit Gebläse-Unterstützung Anwendung. Die Steuerschaltung gemäß EP-0 855 755 B1 ist jedoch nicht dahingehend modifizierbar, daß dieselbe bei atmosphärischen Gasbrennern, also bei Gasbrennern ohne Gebläse-Unterstützung, verwendet werden könnte. So wird in der EP-Patentanmeldung 00102821.1 eine Steuerschaltung vorgeschlagen, die sowohl bei Gasbrennern mit Gebläse-Unterstützung als auch bei atmosphärischen Gasbrennern zum Einsatz kommen kann.The control circuit according to EP-0 855 755 B1 is used in gas burners with fan support Application. However, the control circuit according to EP-0 855 755 B1 is not Modifiable in that it is the same for atmospheric gas burners Gas burners without fan support could be used. So in the EP patent application 00102821.1 proposed a control circuit, both in gas burners with blower support as well as with atmospheric gas burners can.

Der vorliegenden Erfindung liegt das Problem zu Grunde, eine neuartige Steuerschaltung zu schaffen, die kostengünstig herstellbar ist.The problem underlying the present invention is that of a novel control circuit create that is inexpensive to manufacture.

Dieses Problem wird durch eine Steuerschaltung gemäß den Merkmalen des Anspruchs 1 gelöst.This problem is solved by a control circuit according to the features of claim 1 solved.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung. Nachfolgend werden bevorzugte Ausführungsbeispiele der Erfindung anhand der Zeichnung näher erläutert. In der Zeichnung zeigen:

Figur 1
eine Schaltungsanordnung nach einem ersten Ausführungsbeispiel der Erfindung;
Figur 2
ein Diagramm zur Verdeutlichung der Funktionsweise der Schaltungsanordnung gemäß Fig. 1; und
Figur 3
eine Teil-Schaltungsanordnung nach einem zweiten Ausführungsbeispiel der Erfindung.
Preferred developments of the invention result from the subclaims and the description. Preferred exemplary embodiments of the invention are explained in more detail below with reference to the drawing. The drawing shows:
Figure 1
a circuit arrangement according to a first embodiment of the invention;
Figure 2
a diagram to illustrate the operation of the circuit arrangement of FIG. 1; and
Figure 3
a partial circuit arrangement according to a second embodiment of the invention.

In dem in Figur 1 gezeigtem Ausführungsbeispiel hat ein Relais RY2 einen Umschaltkontakt mit Arbeitskontakt NO2 und Ruhekontakt NC2, während der Kontaktarm C2 an einer Netzspannungsleitung L liegt. Das Relais RY2 ist mit einem elektronischen Schalter, z.B. einem Transistor Q2, in Reihe geschaltet, dessen Steuerelektrode an den Ausgang A einer Steuerelektronik CE angeschlossen ist. Ein Stromkreis mit einer Diode D1 und einem Widerstand R2 führt vom Arbeitskontakt NO2 des Relais RY2 zu dessen Erregerwicklung und über den elektronischen Schalter Q2 zur anderen Netzspannungsleitung N. Zwischen die Netzspannungsleitung L und die andere Netzspannungsleitung N ist eine Gleichspannungs-Versorgungsschaltung aus einem Widerstand R1, einer Diode D8 und einer Parallelschaltung aus einem Kondensator C5 und einer Zenerdiode Z4 geschaltet, wobei die Parallelschaltung aus Kondensator C5 und Zenerdiode Z4 mit der Diode D8 und dem Widerstand R1 in Reihe geschaltet ist.In the exemplary embodiment shown in FIG. 1, a relay RY2 has a changeover contact with NO2 make contact and NC2 normally closed contact, while the C2 contact arm on one Mains voltage line L is. The relay RY2 is equipped with an electronic switch, e.g. a transistor Q2, connected in series, the control electrode to the output A one Control electronics CE is connected. A circuit with a diode D1 and a Resistor R2 leads from normally open contact NO2 of relay RY2 to its field winding and via the electronic switch Q2 to the other mains voltage line N. Between the Mains voltage line L and the other mains voltage line N is a DC voltage supply circuit from a resistor R1, a diode D8 and a parallel connection switched from a capacitor C5 and a Zener diode Z4, the parallel connection from capacitor C5 and Zener diode Z4 with diode D8 and resistor R1 in series is switched.

Der Reihenschaltung von Relais RY2 und elektronischem Schalter Q2 ist einerseits ein Kondensator C6 und anderseits eine Zenerdiode Z6 parallel geschaltet. Ein Ladewiderstand R5 für den Kondensator C6 greift an einem Anschluß L2 der Erregerwicklung des Gasventils MV an. Es ist ein weiterer Kondensator C1 vorgesehen, der zwischen den Arbeitskontakt NO2 des Relais RY2 und das Gasventil MV geschaltet ist. Der Kondensator C1 greift am anderen Anschluß L1 der Erregerwicklung des Gasventils MV an.The series connection of relay RY2 and electronic switch Q2 is on the one hand Capacitor C6 and on the other hand a Zener diode Z6 connected in parallel. A charging resistor R5 for the capacitor C6 engages at a connection L2 of the excitation winding of the gas valve MV on. A further capacitor C1 is provided, which is between the normally open contact NO2 of the Relay RY2 and the gas valve MV is switched. The capacitor C1 intervenes on the other Connection L1 of the field winding of the gas valve MV.

Der Kondensator C1 führt also vom Arbeitskontakt NO2 des Relais RY2 zum Anschluß L1 der Erregerwicklung des Gasventils MV und der Anschluß L2 der Erregerwicklung des Gasventils MV ist über den Ladewiderstand R5 an den Kondensator C6 angeschlossen. The capacitor C1 thus leads from the normally open contact NO2 of the relay RY2 to the connection L1 the field winding of the gas valve MV and the connection L2 of the field winding of the Gas valve MV is connected to capacitor C6 via charging resistor R5.

Der Eingang E der Steuerelektronik CE greift zwischen das Relais RY2 und den elektronischen Schalter Q2 an. Es ist jedoch auch möglich, daß der Eingang E der Steuerelektronik CE oberhalb des Relais RY2 - also zwischen Relais RY2 und Widerstand R2 ― angreift.The input E of the control electronics CE reaches between the relay RY2 and the electronic switch Q2. However, it is also possible that the input E of the Control electronics CE above the relay RY2 - i.e. between relay RY2 and resistor R2 - attacks.

Des weiteren ist ein Stromkreis aus einem Widerstand R4 und einer zum Widerstand R4 in Reihe geschalteten Diode D2 parallel zu den Kontakten NC2 und NO2 des Relais RY2 geschaltet. Der Stromkreis aus Widerstand R4 und Diode D2 führt vom Ruhekontakt NC2 des Relais RY2 über den Stromkreis aus Diode D1 und Widerstand R2 zur Erregerwicklung des Relais RY2 und über den elektronischen Schalter Q2 zur Netzspannungsleitung N.Furthermore, a circuit from a resistor R4 and one to the resistor R4 is in Series connected diode D2 in parallel to contacts NC2 and NO2 of relay RY2 connected. The circuit of resistor R4 and diode D2 leads from the normally closed contact NC2 Relay RY2 via the circuit consisting of diode D1 and resistor R2 for excitation winding of the Relay RY2 and via the electronic switch Q2 to the mains voltage line N.

Ferner ist ein Stromkreis aus einem Widerstand R3 und einer zum Widerstand R3 in Reihe geschalteten Diode D3 vorgesehen. Widerstand R3 und Diode D3 sind zwischen den Ruhekontakt NC2 des Relais RY2 und den Anschluß L2 der Erregerwicklung des Gasventils MV geschaltet.Furthermore, a circuit from a resistor R3 and one to the resistor R3 is in series switched diode D3 provided. Resistor R3 and diode D3 are between the Normally closed contact NC2 of relay RY2 and connection L2 of the field winding of the gas valve MV switched.

Gemäß Figur 1 ist ein Gebläse FA zwischen Arbeitskontakt NO2 und Massepotential N geschaltet. Zwischen den Anschluß L2 des Gasventils MV und die Netzspannungsleitung N ist ein Schalter PS mit Kontakten NO und C geschaltet.According to FIG. 1, there is a blower FA between NO2 and ground potential N. connected. Is between the connection L2 of the gas valve MV and the mains voltage line N. a switch PS with contacts NO and C switched.

Die Steuerelektronik CE der erfindungsgemäßen Steuerschaltung umfaßt einen mono-stabilen Timer-Schaltkreis und einen bi-stabilen Halteschaltkreis. Der Timer-Schaltkreis wird gebildet aus: einer Diode D9, einem Kondensator C7, Widerständen R14, R16, R6, R12, R8, R7, R10 und R17, einem Komparator U1 und einem elektronischen Schalter Q7. Der Halteschaltkreis wird gebildet aus: Kondensatoren C2 und C4, Widerständen R55, R44 und R47 sowie einem Komparator U2. Wie Figur 1 entnommen werden kann, bilden die elektronischen Schalter Q2 und Q7 zusammen einen Darlington-Transistor.The control electronics CE of the control circuit according to the invention comprises a mono-stable Timer circuit and a bi-stable hold circuit. The timer circuit is formed from: a diode D9, a capacitor C7, resistors R14, R16, R6, R12, R8, R7, R10 and R17, a comparator U1 and an electronic switch Q7. The hold circuit is composed of: capacitors C2 and C4, resistors R55, R44 and R47 and one Comparator U2. As can be seen in FIG. 1, the electronic switches form Q2 and Q7 together a Darlington transistor.

Der Kondensator C7 des Timer-Schaltkreises wird über die Diode D9 direkt vom Kondensator C6 aufgeladen. Erfindungsgemäß ist der Timer-Schaltkreis mono-stabil ausgebildet. Dies wird dadurch erzielt, daß die parallel zum Kondensator C6 geschaltete Zenerdiode Z6 das am Eingang E der Steuerelektronik CE anliegende Signal beschränkt. Hierdurch ist gewährleistet, daß das am Plus (+) - Eingang des Komparators U1 anliegende Signal das am Minus (-)-Eingang des Komparators U1 anliegende Signal normalerweise nicht überschreitet. Der Timer-Schaltkreis muß auf andere Art und Weise aktiviert werden.The capacitor C7 of the timer circuit is directly connected to the capacitor via the diode D9 C6 charged. According to the invention, the timer circuit is monostable. this will achieved in that the Zener diode Z6 connected in parallel with the capacitor C6 the most Input E of the control electronics CE limited signal present. This ensures that the signal at the plus (+) input of the comparator U1 is at the minus (-) input of the comparator U1 signal normally does not exceed. The timer circuit must be activated in a different way.

Zur Aktivierung des Timer-Schaltkreises ist der bi-stabile Halteschaltkreis vorgesehen. Falls z.B. das Ausgangssignal des Komparators U2 hoch ist, so wird die Spannung des Plus (+) - Eingangs des Komparators U2 durch die Schaltung aus Widerständen R55 und R47 und dem Signal +V bestimmt. Nach einem Einschalten ― siehe sogenanntes "Power-up"-Signal der Figur 2 ― ist der Kondensator C4 entladen und der Komparator U2 wird automatisch in einen Ausgangsmodus hoher Impedanz überführt. Die Spannung des Minus (-) - Eingangs des Komparators U2 wird durch die Schaltung aus Widerständen R7, R6 und R12 und dem Signal +V bestimmt. Der Minus (-) ― Eingang ist in Figur 1 mit ST bezeichnet.The bi-stable hold circuit is provided to activate the timer circuit. If e.g. the output signal of the comparator U2 is high, the voltage of the plus (+) - Input of the comparator U2 through the circuit of resistors R55 and R47 and the Signal + V determined. After switching on - see the so-called "power-up" signal of the figure 2 - the capacitor C4 is discharged and the comparator U2 is automatically converted into one High impedance output mode converted. The voltage of the minus (-) input of the Comparator U2 is formed by the circuit of resistors R7, R6 and R12 and the signal + V determined. The minus (-) input is labeled ST in FIG.

Falls der Kondensator C6 entladen ist, ist das ST-Signal kleiner als das Signal des Plus (+) - Eingangs des Komparators U2.If the capacitor C6 is discharged, the ST signal is smaller than the signal of the plus (+) - Input of the comparator U2.

Falls der Kondensator C6 geladen ist, ist das ST-Signal größer als das Signal des Plus (+) - Eingangs des Komparators U2. Das Ausgangssignal des Komparators U2 nimmt ab. Die im Kondensator C2 gespeicherte Energie macht den elektronischen Schalter Q7 durch einen negativen Impuls auf den Emitter desselben leitend. Da nun der elektronische Schalter Q7 leitend ist, wird der Widerstand R8 den Wert des ST-Signals weiter verringern. Der Komparator U1 wird dadurch in einen Ausgangsmodus hoher Impedanz überführt, der elektronische Schalter Q7 leitet weiterhin, der elektronische Schalter Q2 beginnt zu leiten,. Das am Eingang E der Steuerelektronik CE anliegende Signal verringert sich, das Relais RY2 schaltet ein und letztendlich werden Gebläse FA und Gasventil MV aktiviert.If the capacitor C6 is charged, the ST signal is larger than the signal of the plus (+) - Input of the comparator U2. The output signal of the comparator U2 decreases. The in Capacitor C2 stores energy through electronic switch Q7 negative impulse on its emitter. Since the electronic switch Q7 is conductive, resistor R8 will further decrease the value of the ST signal. The Comparator U1 is thereby converted into a high impedance output mode which electronic switch Q7 continues to conduct, electronic switch Q2 begins to conduct. The Signal present at input E of control electronics CE is reduced, relay RY2 switches on and finally the fan FA and gas valve MV are activated.

Dieser Prozeß stoppt nachdem das Signal ― also die Spannung ― am Plus (+) - Eingangs des Komparators U1 unter das Signal am Minus (-) - Eingangs des Komparators abfällt. Die elektronischen Schalter Q2 und Q7 sind dann nicht mehr leitend, das Relais RY2 schaltet aus und letztendlich werden Gebläse FA und Gasventil MV deaktiviert.This process stops after the signal - the voltage - at the plus (+) input of the Comparator U1 drops below the signal at the minus (-) input of the comparator. The Electronic switches Q2 and Q7 are then no longer conductive, the relay RY2 switches off and finally the fan FA and gas valve MV are deactivated.

Der bi-stabile Halteschaltkreis kann nur dadurch zurückgesetzt werde, indem die Spannungversorgung unterbrochen wird. Der gesamte Signalfluß ist in Figur 2 gezeigt. The bi-stable hold circuit can only be reset by the Power supply is interrupted. The entire signal flow is shown in Figure 2.

Mit der oben beschriebenen Steuerschaltung wird demnach ein elektronischer Halteschaltkreis realisiert. Es ergibt sich eine flüchtige Steuerschaltung, die bei Gasbrennern mit Gebläse-Unterstützung als auch bei atmosphärischen Gasbrennern, also bei Gasbrennern ohne Gebläse-Unterstützung, verwendet werden kann.The control circuit described above accordingly becomes an electronic holding circuit realized. The result is a volatile control circuit that supports gas burners with blowers as well as with atmospheric gas burners, i.e. gas burners without fan support, can be used.

Bei der im Zusammenhang mit Figur 1 beschriebenen Steuerschaltung ist ein Startversuch des zu steuernden Gasbrenners möglich. Die erfindungsgemäße Steuerschaltung kann auf einfache Weise dahingehend erweitert werden, daß zwei Startversuche möglich sind. Fig. 3 zeigt eine Ausschnitt der hierfür relevanten Bauelemente. Der bi-stabile Halteschaltkreis muß lediglich verdoppelt werden. Die Bauelemente des bi-stabilen Halteschaltkreises für den zweiten Startversuch sind: Kondensatoren C2-1 und C4-1, Widerstände R55-1, R44-1 und R47-1 sowie ein Komparator U2-1. Der Ausgang des Komparators U2-1 ist mit dem Widerstand R47 verbunden. Gemäß Figur 3 ist der Widerstand R55-1 parallel zu den Widerständen R55 und R47 geschaltet.In the control circuit described in connection with FIG. 1, a start attempt of the possible to control gas burner. The control circuit according to the invention can be simple To be expanded in such a way that two start attempts are possible. Fig. 3 shows one Section of the relevant components. The bi-stable hold circuit only has to be doubled. The components of the bi-stable hold circuit for the second Starting attempts are: capacitors C2-1 and C4-1, resistors R55-1, R44-1 and R47-1 and a comparator U2-1. The output of the comparator U2-1 is with the resistor R47 connected. According to Figure 3, the resistor R55-1 is parallel to the resistors R55 and R47 switched.

Es ist selbstverständlich, daß der bi-stabile Halteschaltkreis nach dem obigen Prinzip so oft vervielfacht werden kann, wie Startversuch gewährleistet sein sollen.It goes without saying that the bi-stable hold circuit operates so often according to the above principle can be multiplied how start attempts should be guaranteed.

Claims (8)

Steuerschaltung für ein Gasventil mit: a) einem Relais (RY2) mit Kontakten (NC2, N02), b) einem Kondensator (C6) samt Ladewiderstand (R5), c) einem mit dem Relais (RY2) in Reihe geschalteten elektronischen Schalter (Q2), wobei diese Reihenschaltung (RY2, Q2) dem Kondensator (C6) parallel geschaltet ist, d) einem ersten Stromkreis aus einem Widerstand (R2) und einer zu dem Widerstand (R2) in Reihe geschalteten Diode (D1) für das Relais (RY2), e) einer Steuerelektronik (CE),
dadurch gekennzeichnet, daß f) die Steuerelektronik (CE) einen mono-stabilen Timer-Schaltkreis (D9, C7, R14, R16, R6, R12, R8, R7, R10, R17, U1, Q7) und mindestens einen bi-stabilen Halteschaltkreis (C2, C4, R55, R44, R47, U2; C2-1, C4-1, R55-1, R44-1, R47-1, U2-1) aufweist. Control circuit for a gas valve with: a) a relay (RY2) with contacts (NC2, N02), b) a capacitor (C6) with charging resistor (R5), c) an electronic switch (Q2) connected in series with the relay (RY2), this series connection (RY2, Q2) being connected in parallel with the capacitor (C6), d) a first circuit comprising a resistor (R2) and a diode (D1) for the relay (RY2) connected in series with the resistor (R2), e) control electronics (CE),
characterized in that f) the control electronics (CE) a mono-stable timer circuit (D9, C7, R14, R16, R6, R12, R8, R7, R10, R17, U1, Q7) and at least one bi-stable holding circuit (C2, C4 , R55, R44, R47, U2; C2-1, C4-1, R55-1, R44-1, R47-1, U2-1). Steuerschaltung nach Anspruch 1, gekennzeichnet durch eine Zenerdiode (Z6), die einerseits parallel zu der Reihenschaltung aus Relais (RY2) und elektronischem Schalter (Q2) und andererseits parallel zum Kondensator (C6) geschaltet ist.Control circuit according to Claim 1, characterized by a zener diode (Z6) which is connected on the one hand in parallel to the series circuit comprising a relay (RY2) and electronic switch (Q2) and on the other hand in parallel to the capacitor (C6). Steuerschaltung nach Anspruch 2, dadurch gekennzeichnet, daß die Zenerdiode (Z6) das am Eingang (E) der Steuerelektronik (CE) anliegende Signal beschränkt.Control circuit according to Claim 2, characterized in that the zener diode (Z6) limits the signal present at the input (E) of the control electronics (CE). Steuerschaltung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der oder jeder bi-stabile Halteschaltkreis einen Komparator (U2; U2-1) mit zwei Eingängen und einem Ausgang aufweist, wobei zwischen den Ausgang und einen ersten Eingang, insbesondere einen Plus (+) ― Eingang, des Komparators (U2; U2-1) ein erster Widerstand (R44; R44-1) und parallel zum erstem Widerstand (R44; R44-1) eine Reihenschaltung aus einem Kondensator (C4; C4-1) und einem zweiten Widerstand (R55; R55-1) geschaltet ist. Control circuit according to one or more of claims 1 to 3, characterized in that the or each bi-stable holding circuit has a comparator (U2; U2-1) with two inputs and one output, with between the output and a first input, in particular one Plus (+) - input, the comparator (U2; U2-1) a first resistor (R44; R44-1) and in parallel to the first resistor (R44; R44-1) a series connection of a capacitor (C4; C4-1) and a second resistor (R55; R55-1) is connected. Steuerschaltung nach Anspruch 4, dadurch gekennzeichnet, daß an den Ausgang des Komparators (U2; U2-1) ein dritter Widerstand (R47; R47-1) und ein Kondensator (C2; C2-1) geschaltet ist, wobei der Kondensator (C2; C2-1) an den Angang (A) der Steuerelektronik (CE) angreift.Control circuit according to Claim 4, characterized in that a third resistor (R47; R47-1) and a capacitor (C2; C2-1) is connected to the output of the comparator (U2; U2-1), the capacitor (C2; C2-1) on the connector (A) of the control electronics (CE). Steuerschaltung nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zur Gewährleistung mehrerer Startversuche entsprechend der Anzahl der gewünschten Startversuche bi-stabile Halteschaltkreise vorhanden sind, insbesondere sind zur Gewährleistung von zwei Startversuchen sind zwei bi-stabile Halteschaltkreise (C2, C4, R55, R44, R47, U2; C2-1, C4-1, R55-1, R44-1, R47-1, U2-1) vorhanden.Control circuit according to one or more of claims 1 to 5, characterized in that bi-stable holding circuits are provided to ensure a plurality of start attempts corresponding to the number of desired start attempts, in particular there are two bi-stable hold circuits (C2, C4, R55, R44, R47, U2; C2-1, C4-1, R55-1, R44-1, R47-1, U2-1) available. Steuerschaltung nach Anspruch 6, dadurch gekennzeichnet, daß die bi-stabilen Halteschaltkreise derart miteinander verschaltet sind, daß der dritte Widerstand (R47) eines ersten bi-stabilen Halteschaltkreises einerseits an den Ausgang des Komparators (U2) des ersten bi-stabilen Halteschaltkreises (C2, C4, R55, R44, R47, U2) und andererseits an den Ausgang des Komparators (U2-1) eines zweiten bi-stabilen Halteschaltkreises (C2-1, C4-1, R55-1, R44-1, R47-1, U2-1) angeschlossen ist.Control circuit according to Claim 6, characterized in that the bi-stable holding circuits are connected to one another in such a way that the third resistor (R47) of a first bi-stable holding circuit on the one hand to the output of the comparator (U2) of the first bi-stable holding circuit (C2, C4, R55, R44, R47, U2) and on the other hand to the output of the comparator (U2-1) of a second bi-stable holding circuit (C2-1, C4-1, R55-1, R44-1, R47-1, U2 -1) is connected. Steuerschaltung nach Anspruch 7, dadurch gekennzeichnet, daß der zweite Widerstand (R55-1) des zweiten bi-stabilen Halteschaltkreises (C2-1, C4-1, R55-1, R44-1, R47-1, U2-1) parallel zu den Widerständen (R55, R47) des ersten bi-stabilen Halteschaltkreises (C2, C4, R55, R44, R47, U2) geschaltet ist.Control circuit according to claim 7, characterized in that the second resistor (R55-1) of the second bi-stable hold circuit (C2-1, C4-1, R55-1, R44-1, R47-1, U2-1) in parallel the resistors (R55, R47) of the first bi-stable holding circuit (C2, C4, R55, R44, R47, U2) is connected.
EP00118473A 2000-08-25 2000-08-25 Control circuit Expired - Lifetime EP1182402B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES00118473T ES2209736T3 (en) 2000-08-25 2000-08-25 CONTROL CIRCUIT.
EP00118473A EP1182402B1 (en) 2000-08-25 2000-08-25 Control circuit
AT00118473T ATE259045T1 (en) 2000-08-25 2000-08-25 CONTROL CIRCUIT
DE50005207T DE50005207D1 (en) 2000-08-25 2000-08-25 control circuit
PT00118473T PT1182402E (en) 2000-08-25 2000-08-25 COMMAND CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00118473A EP1182402B1 (en) 2000-08-25 2000-08-25 Control circuit

Publications (2)

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EP1182402A1 true EP1182402A1 (en) 2002-02-27
EP1182402B1 EP1182402B1 (en) 2004-02-04

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ID=8169655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00118473A Expired - Lifetime EP1182402B1 (en) 2000-08-25 2000-08-25 Control circuit

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EP (1) EP1182402B1 (en)
AT (1) ATE259045T1 (en)
DE (1) DE50005207D1 (en)
ES (1) ES2209736T3 (en)
PT (1) PT1182402E (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0440872A2 (en) * 1990-02-06 1991-08-14 Honeywell B.V. Ignition and safety circuit for gas burners
EP0698767A1 (en) * 1994-08-24 1996-02-28 Honeywell B.V. Control circuit for a gas burner with monitoring of the combustion air supply
EP0855557A1 (en) * 1997-01-22 1998-07-29 Honeywell B.V. Control circuit for a gas valve with monitoring of the combustion air supply
EP0855755B1 (en) 1997-01-23 2003-07-23 Murata Manufacturing Co., Ltd. Dielectric line intersection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0440872A2 (en) * 1990-02-06 1991-08-14 Honeywell B.V. Ignition and safety circuit for gas burners
EP0698767A1 (en) * 1994-08-24 1996-02-28 Honeywell B.V. Control circuit for a gas burner with monitoring of the combustion air supply
EP0698767B1 (en) 1994-08-24 1996-10-30 Honeywell B.V. Control circuit for a gas burner with monitoring of the combustion air supply
EP0855557A1 (en) * 1997-01-22 1998-07-29 Honeywell B.V. Control circuit for a gas valve with monitoring of the combustion air supply
EP0855755B1 (en) 1997-01-23 2003-07-23 Murata Manufacturing Co., Ltd. Dielectric line intersection

Also Published As

Publication number Publication date
PT1182402E (en) 2004-06-30
ES2209736T3 (en) 2004-07-01
EP1182402B1 (en) 2004-02-04
DE50005207D1 (en) 2004-03-11
ATE259045T1 (en) 2004-02-15

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