EP1126219B1 - Control circuit - Google Patents
Control circuit Download PDFInfo
- Publication number
- EP1126219B1 EP1126219B1 EP00102821A EP00102821A EP1126219B1 EP 1126219 B1 EP1126219 B1 EP 1126219B1 EP 00102821 A EP00102821 A EP 00102821A EP 00102821 A EP00102821 A EP 00102821A EP 1126219 B1 EP1126219 B1 EP 1126219B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resistor
- relay
- diode
- charging
- capacitor
- 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
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Classifications
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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
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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
- F23N5/18—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
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
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-0 855 557 B1 known.
- the control circuit according to EP-0 855 557 B1 is an advantageous one Further development of the control circuit according to EP-0 698 767 B1.
- EP-0 698 767 B1 and EP-0 855 557 B1 is expressly referred to here.
- control circuit according to EP-0 855 557 B1 is used in gas burners with fan support Application.
- control circuit according to EP-0 855 557 B1 is not Modifiable in that it is the same for atmospheric gas burners Gas burners without fan support could be used.
- the present invention is therefore based on the problem of a novel control circuit to create that both in gas burners with fan support as well atmospheric gas burners can be used, and furthermore all advantages maintains the control circuit according to EP-0 855 557 B1.
- a relay RY2 has one Changeover contact with NO2 make contact and NC2 normally closed contact, while the contact arm C2 is on an AC line L.
- the relay RY2 is with a electronic switches, e.g. a transistor Q2 connected in series, the control electrode is connected to output A of control electronics CE.
- a circuit with one Diode D1 and a resistor R2 leads from normally open contact NO2 of relay RY2 to it Excitation winding and via the electronic switch Q2 to the other mains voltage line N.
- the series connection of relay RY2 and electronic switch Q2 is on Charging capacitor C5 connected in parallel, the charging resistor R5 at a terminal L2 of the Excitation winding of the gas valve MV attacks.
- Another capacitor is according to the invention C1 provided between the normally open contact NO2 of the relay RY2 and the gas valve MV is switched. The capacitor C1 engages the other terminal L1 of the excitation winding MV gas valve.
- 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 the charging capacitor C5 via the charging resistor R5.
- the input E of the control electronics CE is at that facing away from the ground potential N. Assignment of the charging capacitor C5 connected, as well as resistor R2 and Resistor R5.
- a circuit is also off a resistor R4 and a diode D2 connected in series with the resistor R4 in parallel switched to contacts NC2 and NO2 of relay RY2.
- the circuit of resistance R4 and diode D2 leads in these exemplary embodiments according to FIGS. 1, 2, 4 and 6 Normally closed contact NC2 of relay RY2 via the circuit consisting of diode D1 and resistor R2 Excitation winding of the relay RY2 and via the electronic switch Q2 Mains voltage line N.
- the circuit is off Resistor R4 and diode D2 between make contact NO2 of relay RY2 and on the mains AC voltage line L lying contact arm C2.
- All of the exemplary embodiments furthermore have a circuit comprising one Resistor R1 and a diode D3 connected in series with resistor R1.
- resistor R1 and diode D3 between the normally closed contact NC2 of the relay RY2 and the connection L1 of the field winding of the Gas valve MV switched.
- Resistor R1 and diode D3 between the normally closed contact NC2 of the relay RY2 and the other terminal L2 of the excitation winding of the gas valve MV switched.
- At the 4 are resistor R1 and diode D3 between the at the Mains AC voltage line L lying contact arm C2 and the connection L1 of the Excitation winding of the gas valve MV switched.
- a fan FA is in the embodiments according to Figures 1 to 4 between Normally open contact NO2 and ground potential N. These embodiments are further common that between the port L2 of the gas valve MV and the Mains voltage line N a switch PS with contacts NO and C is connected.
- the gas valve MV is connected to the blower FA via the condenser C1.
- the Capacitor C1 accordingly ensures that the resistor R1 and the diode D3 flowing charging current not via the fan FA to the mains voltage line N is short-circuited, but can be used to charge the capacitor C5.
- the capacitor C1 accordingly disconnects or decouples the circuit from the resistor R1 and Diode D3 from the fan FA.
- a high rating of the resistors R1 and R5 e.g. 33k Ohm
- this charging current of the capacitor C5 can also not the relay RY2 actuate. This is also referred to as the failure mode.
- the control electronics CE switches the electronic ones Switch Q2 through.
- the relay RY2 picks up, the contact C2-NO2 is closed and that Fan FA starts to run.
- the relay RY2 via the diode D1 and the resistor R2 continuously supplied with voltage, so that the relay RY2 in tightened state can remain.
- the switch PS closed.
- the gas valve MV is then closed via the capacitor C1.
- the gas valve is MV designed as an AC voltage valve.
- the gas valve MV shown in Figures 1 to 4 replaced by a direct voltage (DC) valve can be.
- DC direct voltage
- FIG. 5 Such a gas valve MV operated with direct voltage is shown in FIG. 5 together with the required rectifier circuit from the diodes D11, D12, D13 and D14.
- the mode of operation of the circuit arrangements according to FIGS. 1 to 4 changes but not by this.
- DC direct voltage
- the relay RY2 as a relay is formed by a changeover contact with NO2 normally open contact and normally closed contact NC2 has.
- the relay RY2 can also be used as a relay with isolating switch / isolating contact be trained.
- the circuit arrangement according to FIG. 6 is used for atmospheric Gas burners that have no fan. In this respect, there is no circuit arrangement according to FIG. 6 also the one present in the circuit arrangements according to FIGS. 1 to 4 Switch PS and the fan FA. Except for these differences, however, that is correct 6 corresponds to the circuit arrangement of Figure 2. From this the following mode of operation of the circuit arrangement according to FIG. 6 results: After a heat request, the resistor R1 and the diode D3 flowing current on the mains voltage line N short-circuited. Due to the The fact that there is no fan here, the required charging current flows for Capacitor C5 through resistor R4, diodes D2 and D1 and resistor R2.
- the electronic switch Q2 in the Failure mode, the electronic switch Q2 is short-circuited, so that the Charging current is insufficient to operate relay RY2. If the capacitor C5 is charged, the control electronics CE turns on the electronic switch Q2. The Relay RY2 picks up and contact C2-NO2 is closed.
- the relay RY2 is continuously supplied with voltage via the diode D1 and the resistor R2 supplied so that the relay RY2 can remain energized.
- the gas valve MV is then closed via capacitor C1.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Magnetically Actuated Valves (AREA)
- Selective Calling Equipment (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
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-0 855 557 B1 bekannt. Die Steuerschaltung gemäß EP-0 855 557 B1 ist eine vorteilhafte Fortentwicklung der Steuerschaltung gemäß EP-0 698 767 B1. Auf EP-0 698 767 B1 und EP-0 855 557 B1 wird hier ausdrücklich Bezug genommen.Control circuits according to the prior art are known from EP-0 698 767 B1 and EP-0 855 557 B1 known. The control circuit according to EP-0 855 557 B1 is an advantageous one Further development of the control circuit according to EP-0 698 767 B1. On EP-0 698 767 B1 and EP-0 855 557 B1 is expressly referred to here.
Die Steuerschaltung gemäß EP-0 855 557 B1 findet bei Gasbrennern mit Gebläse-Unterstützung Anwendung. Die Steuerschaltung gemäß EP-0 855 557 B1 ist jedoch nicht dahingehend modifizierbar, daß dieselbe bei atmosphärischen Gasbrennern, also bei Gasbrennern ohne Gebläse-Unterstützung, verwendet werden könnte.The control circuit according to EP-0 855 557 B1 is used in gas burners with fan support Application. However, the control circuit according to EP-0 855 557 B1 is not Modifiable in that it is the same for atmospheric gas burners Gas burners without fan support could be used.
Der vorliegenden Erfindung liegt daher das Problem zu Grunde, eine neuartige Steuerschaltung zu schaffen, die sowohl bei Gasbrennern mit Gebläse-Unterstützung als auch bei atmosphärischen Gasbrennern zum Einsatz kommen kann, und die des weiteren alle Vorteile der Steuerschaltung gemäß EP-0 855 557 B1 beibehält.The present invention is therefore based on the problem of a novel control circuit to create that both in gas burners with fan support as well atmospheric gas burners can be used, and furthermore all advantages maintains the control circuit according to EP-0 855 557 B1.
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 abhängigen Ansprüchen 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 zur Verwendung bei Gasbrennern mit Gebläse-Unterstützung;
- Figur 2
- eine Schaltungsanordnung nach einem zweiten Ausführungsbeispiel der Erfindung zur Verwendung bei Gasbrennern mit Gebläse-Unterstützung;
- Figur 3
- eine Schaltungsanordnung nach einem dritten Ausführungsbeispiel der Erfindung zur Verwendung bei Gasbrennern mit Gebläse-Unterstützung;
- Figur 4
- eine Schaltungsanordnung nach einem vierten Ausführungsbeispiel der Erfindung zur Verwendung bei Gasbrennem mit Gebläse-Unterstützung;
- Figur 5
- eine Schaltungsanordnung fiir ein Gleichspannungs-(DC)-Ventil MV zur Verwendung an Stelle des in Figuren 1 bis 4 gezeigten Wechselspannungs-(AC)-Ventils MV; und
- Figur 6
- eine Schaltungsanordnung nach einem fünften Ausführungsbeispiel der Erfindung zur Verwendung bei atmosphärischen Gasbrennern.
- Figure 1
- a circuit arrangement according to a first embodiment of the invention for use in gas burners with fan support;
- Figure 2
- a circuit arrangement according to a second embodiment of the invention for use in gas burners with fan support;
- Figure 3
- a circuit arrangement according to a third embodiment of the invention for use in gas burners with fan support;
- Figure 4
- a circuit arrangement according to a fourth embodiment of the invention for use in gas burners with fan support;
- Figure 5
- a circuit arrangement for a direct voltage (DC) valve MV for use instead of the alternating voltage (AC) valve MV shown in FIGS. 1 to 4; and
- Figure 6
- a circuit arrangement according to a fifth embodiment of the invention for use in atmospheric gas burners.
In allen fünf Ausführungsbeispielen gemäß Figuren 1 bis 4 und 6 hat ein Relais RY2 einen Umschaltkontakt mit Arbeitskontakt NO2 und Ruhekontakt NC2, während der Kontaktarm C2 an einer Netzwechselspannungsleitung 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. Der Reihenschaltung von Relais RY2 und elektronischem Schalter Q2 ist ein Ladekondensator C5 parallelgeschaltet, dessen Ladewiderstand R5 an einem Anschluß L2 der Erregerwicklung des Gasventils MV angreift. Erfindungsgemäß 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. In all five exemplary embodiments according to FIGS. 1 to 4 and 6, a relay RY2 has one Changeover contact with NO2 make contact and NC2 normally closed contact, while the contact arm C2 is on an AC line L. The relay RY2 is with a electronic switches, e.g. a transistor Q2 connected in series, the control electrode is connected to output A of control electronics CE. A circuit with one Diode D1 and a resistor R2 leads from normally open contact NO2 of relay RY2 to it Excitation winding and via the electronic switch Q2 to the other mains voltage line N. The series connection of relay RY2 and electronic switch Q2 is on Charging capacitor C5 connected in parallel, the charging resistor R5 at a terminal L2 of the Excitation winding of the gas valve MV attacks. Another capacitor is according to the invention C1 provided between the normally open contact NO2 of the relay RY2 and the gas valve MV is switched. The capacitor C1 engages the other terminal L1 of the excitation winding MV gas valve.
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 Ladekondensator C5 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 the charging capacitor C5 via the charging resistor R5.
Der Eingang E der Steuerelektronik CE ist an die dem Massepotential N abgewandte Belegung des Ladekondensators C5 angeschlossen, ebenso wie Widerstand R2 und Widerstand R5.The input E of the control electronics CE is at that facing away from the ground potential N. Assignment of the charging capacitor C5 connected, as well as resistor R2 and Resistor R5.
In den Ausführungsbeispielen gemäß Figuren 1, 2, und 6 ist des weiteren 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 bei diesen Ausführungsbeispielen gemäß Figuren 1, 2, 4 und 6 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. Beim Ausführungsbeispiel gemäß Figur 3 ist der Stromkreis aus Widerstand R4 und Diode D2 zwischen den Arbeitskontakt NO2 des Relais RY2 und den an der Netzwechselspannungsleitung L liegenden Kontaktarm C2 geschaltet.In the exemplary embodiments according to FIGS. 1, 2 and 6, a circuit is also off a resistor R4 and a diode D2 connected in series with the resistor R4 in parallel switched to contacts NC2 and NO2 of relay RY2. The circuit of resistance R4 and diode D2 leads in these exemplary embodiments according to FIGS. 1, 2, 4 and 6 Normally closed contact NC2 of relay RY2 via the circuit consisting of diode D1 and resistor R2 Excitation winding of the relay RY2 and via the electronic switch Q2 Mains voltage line N. In the exemplary embodiment according to FIG. 3, the circuit is off Resistor R4 and diode D2 between make contact NO2 of relay RY2 and on the mains AC voltage line L lying contact arm C2.
Alle Ausführungsbeispiele verfügen des weiteren über einen Stromkreis aus einem Widerstand R1 und einer zum Widerstand R1 in Reihe geschalteten Diode D3. Bei den Ausführungsbeispielen gemäß Figuren 1 und 3 sind Widerstand R1 und Diode D3 zwischen den Ruhekontakt NC2 des Relais RY2 und den Anschluß L1 der Erregerwicklung des Gasventils MV geschaltet. Bei den Ausführungsbeispielen gemäß Figuren 2 und 6 sind Widerstand R1 und Diode D3 hingegen zwischen den Ruhekontakt NC2 des Relais RY2 und den anderen Anschluß L2 der Erregerwicklung des Gasventils MV geschaltet. Beim Ausführungsbeispiel gemäß Figur 4 sind Widerstand R1 und Diode D3 zwischen den an der Netzwechselspannungsleitung L liegenden Kontaktarm C2 und den Anschluß L1 der Erregerwicklung des Gasventils MV geschaltet.All of the exemplary embodiments furthermore have a circuit comprising one Resistor R1 and a diode D3 connected in series with resistor R1. Both Embodiments according to Figures 1 and 3, resistor R1 and diode D3 between the normally closed contact NC2 of the relay RY2 and the connection L1 of the field winding of the Gas valve MV switched. In the exemplary embodiments according to FIGS. 2 and 6 Resistor R1 and diode D3, however, between the normally closed contact NC2 of the relay RY2 and the other terminal L2 of the excitation winding of the gas valve MV switched. At the 4 are resistor R1 and diode D3 between the at the Mains AC voltage line L lying contact arm C2 and the connection L1 of the Excitation winding of the gas valve MV switched.
In den Ausführungsbeispielen gemäß Figuren 1, 3 und 4, die bei Gasbrennern mit Gebläse-Unterstützung Verwendung finden, greift Diode D3 demnach an den Anschluß L1 des Gasventils MV an, während bei dem Ausführungsbeispiel gemäß Figur 2, das ebenfalls bei Gasbrennern mit Gebläse-Unterstützung Verwendung findet, die Diode D3 an den Anschluß L2 des Gasventils MV angreift. An der prinzipiellen Funktionsweise der Schaltungsanordnungen gemäß Figuren 1 bis 4 ändert dies jedoch nichts. Auch ist für die prinzipielle Funktionsweise ohne Bedeutung, ob Widerstand R4 (wie bei den Ausführungsbeispielen gemäß Figuren 1, 2 und 4) am Ruhekontakt NC2 angreift oder (wie bei dem Ausführungsbeispiel gemäß Figur 3) am Kontaktarm C2. Entscheidend für die prinzipielle Funktionsweise der Vorrichtung ist die erfindungsgemäße Anordnung des Kondensators C1.In the exemplary embodiments according to FIGS. 1, 3 and 4, which are used in gas burners with fan support Find use, diode D3 accordingly to the connection L1 of the Gas valve MV on, while in the embodiment according to Figure 2, also at Gas burners with fan support are used, the diode D3 to the connection L2 of the gas valve MV attacks. The principle of operation of the Circuit arrangements according to Figures 1 to 4, however, do not change anything. Is also for the Principle of operation irrelevant whether resistor R4 (as with the Embodiments according to Figures 1, 2 and 4) attacks the normally closed contact NC2 or (as in the exemplary embodiment according to FIG. 3) on the contact arm C2. Crucial for that principle of operation of the device is the arrangement of the invention Capacitor C1.
Ein Gebläse FA ist in den Ausführungsbeispielen gemäß Figuren 1 bis 4 zwischen Arbeitskontakt NO2 und Massepotential N geschaltet. Diesen Ausführungsbeispielen ist weiterhin gemeinsam, daß zwischen den Anschluß L2 des Gasventils MV und die Netzspannungsleitung N ein Schalter PS mit Kontakten NO und C geschaltet ist.A fan FA is in the embodiments according to Figures 1 to 4 between Normally open contact NO2 and ground potential N. These embodiments are further common that between the port L2 of the gas valve MV and the Mains voltage line N a switch PS with contacts NO and C is connected.
Bei den Schaltungsanordnungen gemäß Figuren 1 bis 4, die wie bereits erwähnt bei Gasbrennern mit Gebläse-Unterstützung zur Anwendung kommen, und die sich hinsichtlich ihrer prinzipiellen Funktionsweise nicht unterscheiden, ist der Widerstand R4 (z.B. 56k Ohm) gegenüber dem Widerstand des Gebläses FA (z.B. 200 Ohm) hoch bemessen. Nach einer Wärmeanforderung wird Spannung an die Netzwechselspannungsleitung L und an die Netzspannungsleitung N angelegt. In Folge dessen, daß der Widerstandswert von R4 hoch und der Widerstandswert des Gebläses FA gering sind, ist die am Gebläse FA anliegende Spannung klein und nicht ausreichend, um den Kondensator C5 über den Stromkreis aus Diode D1 und Widerstand R2 aufzuladen. Falls jedoch der Schalter PS geöffnet ist, wird der Kondensator C5 über den Widerstand R1, die Diode D3 und den Widerstand R5 aufgeladen. Das Gasventil MV ist über den Kondensator C1 an das Gebläse FA angeschlossen. Der Kondensator C1 sorgt demnach dafür, daß der durch den Widerstand R1 und die Diode D3 fließende Ladestrom nicht über das Gebläse FA auf die Netzspannungsleitung N kurzgeschlossen wird, sondern zur Aufladung des Kondensator C5 verwendet werden kann. Der Kondensator C1 trennt oder entkoppelt demnach den Stromkreis aus Widerstand R1 und Diode D3 vom Gebläse FA. Mit einer hohen Bemessung der Widerstände R1 und R5 (z.B. 33k Ohm) wird erreicht, daß der durch die Wicklungen des Gasventils MV strömende Ladestrom das Gasventils MV nicht öffnen kann. Falls hierbei der elektronische Schalter Q2 kurz-geschlossen ist, kann dieser Ladestrom des Kondensators C5 auch das Relais RY2 nicht betätigen. Dies wird auch als Aus-Zustand (failure-mode) bezeichnet. In the circuit arrangements according to Figures 1 to 4, which, as already mentioned at Gas burners with blower support come into play, and are concerned with their basic function does not differ, the resistor R4 (e.g. 56k Ohm) against the resistance of the fan FA (e.g. 200 Ohm) high. After a The heat demand is applied to the AC line L and to the voltage Mains voltage line N applied. As a result, the resistance value of R4 is high and the resistance value of the blower FA is low, is that applied to the blower FA Voltage small and insufficient to turn capacitor C5 out across the circuit Charge diode D1 and resistor R2. However, if the switch PS is open, the Capacitor C5 is charged via resistor R1, diode D3 and resistor R5. The gas valve MV is connected to the blower FA via the condenser C1. The Capacitor C1 accordingly ensures that the resistor R1 and the diode D3 flowing charging current not via the fan FA to the mains voltage line N is short-circuited, but can be used to charge the capacitor C5. The capacitor C1 accordingly disconnects or decouples the circuit from the resistor R1 and Diode D3 from the fan FA. With a high rating of the resistors R1 and R5 (e.g. 33k Ohm) is achieved that the flowing through the windings of the gas valve MV Charging current that gas valve MV cannot open. If the electronic switch Q2 is short-circuited, this charging current of the capacitor C5 can also not the relay RY2 actuate. This is also referred to as the failure mode.
Falls der Kondensators C5 aufgeladen ist, schaltet die Steuerelektronik CE den elektronischen Schalter Q2 durch. Das Relais RY2 zieht an, der Kontakt C2-NO2 wird geschlossen und das Gebläse FA beginnt zu laufen. Darüber hinaus wird das Relais RY2 über die Diode D1 und den Widerstand R2 kontinuierlich mit Spannung versorgt, so daß das Relais RY2 im angezogenen Zustand verbleiben kann.If the capacitor C5 is charged, the control electronics CE switches the electronic ones Switch Q2 through. The relay RY2 picks up, the contact C2-NO2 is closed and that Fan FA starts to run. In addition, the relay RY2 via the diode D1 and the resistor R2 continuously supplied with voltage, so that the relay RY2 in tightened state can remain.
Nachdem ein ausreichender Luftstrom nachgewiesen wurde, wird der Schalter PS geschlossen. Das Gasventil MV wird dann über den Kondensator C1 geschlossen.After a sufficient air flow has been verified, the switch PS closed. The gas valve MV is then closed via the capacitor C1.
Bei den oben beschriebenen Schaltungsanordnungen gemäß Figuren 1 bis 4 ist das Gasventil MV als ein Wechselspannungs-(AC)-Ventil ausgestaltet. An dieser Stelle sei angemerkt, daß das in Figuren 1 bis 4 gezeigte Gasventil MV durch ein Gleichspannungs-(DC)-Ventil ersetzt werden kann. Ein solches mit Gleichspannung betriebenes Gasventil MV zeigt Figur 5 zusammen mit der erforderlichen Gleichrichterschaltung aus den Dioden D11, D12, D13 und D14. Die Arbeitsweise der Schaltungsanordnungen gemäß Figuren 1 bis 4 ändert sich hierdurch jedoch nicht. Bei Verwendung eines Gleichspannungs-(DC)-Ventils kann des weiteren Diode D3 auch direkt an Diode D14 angreifen, ohne daß sich die prinzipielle Arbeitsweise der Schaltungsanordnung ändert.In the circuit arrangements according to FIGS. 1 to 4 described above, the gas valve is MV designed as an AC voltage valve. At this point it should be noted that the gas valve MV shown in Figures 1 to 4 replaced by a direct voltage (DC) valve can be. Such a gas valve MV operated with direct voltage is shown in FIG. 5 together with the required rectifier circuit from the diodes D11, D12, D13 and D14. The mode of operation of the circuit arrangements according to FIGS. 1 to 4 changes but not by this. When using a direct voltage (DC) valve, the attack further diode D3 directly on diode D14, without the principle Operation of the circuit arrangement changes.
Ferner sei angemerkt, daß in den Ausführungsbeispielen das Relais RY2 als Relais ausgebildet ist, das über einen Umschaltkontakt mit Arbeitskontakt NO2 und Ruhekontakt NC2 verfügt. Das Relais RY2 kann aber auch als Relais mit Trennschalter/Trennkontakt ausgebildet sein.Furthermore, it should be noted that in the exemplary embodiments, the relay RY2 as a relay is formed by a changeover contact with NO2 normally open contact and normally closed contact NC2 has. The relay RY2 can also be used as a relay with isolating switch / isolating contact be trained.
Die Schaltungsanordnung nach Figur 6 kommt zur Verwendung bei atmosphärischen Gasbrennern, die kein Gebläse aufweisen. Insofern entfällt bei der Schaltungsanordnung gemäß Figur 6 auch der bei den Schaltungsanordnungen gemäß Figuren 1 bis 4 vorhandene Schalter PS sowie das Gebläse FA. Bis auf diese Unterschiede stimmt jedoch die Schaltungsanordnung der Figur 6 mit der Schaltungsanordnung nach Figur 2 überein. Hieraus ergibt sich folgende Arbeitsweise der Schaltungsanordnung gemäß Figur 6: Nach einer Wärmeanforderung wird der durch den Widerstand R1 und die Diode D3 fließende Strom auf die Netzspannungsleitung N kurz-geschlossen. Bedingt durch den Umstand, daß hier kein Gebläse vorhanden ist, fließt der benötigte Ladestrom für Kondensator C5 durch Widerstand R4, die Dioden D2 und D1 sowie den Widerstand R2. Im sogenannten failure-mode ist der elektronische Schalter Q2 kurz-geschlossen, so daß der Ladestrom nicht ausreicht, um das Relais RY2 zu betätigen. Falls der Kondensator C5 aufgeladen ist, schaltet die Steuerelektronik CE den elektronische Schalter Q2 durch. Das Relais RY2 zieht an und der Kontakt C2-NO2 wird geschlossen.The circuit arrangement according to FIG. 6 is used for atmospheric Gas burners that have no fan. In this respect, there is no circuit arrangement according to FIG. 6 also the one present in the circuit arrangements according to FIGS. 1 to 4 Switch PS and the fan FA. Except for these differences, however, that is correct 6 corresponds to the circuit arrangement of Figure 2. From this the following mode of operation of the circuit arrangement according to FIG. 6 results: After a heat request, the resistor R1 and the diode D3 flowing current on the mains voltage line N short-circuited. Due to the The fact that there is no fan here, the required charging current flows for Capacitor C5 through resistor R4, diodes D2 and D1 and resistor R2. in the Failure mode, the electronic switch Q2 is short-circuited, so that the Charging current is insufficient to operate relay RY2. If the capacitor C5 is charged, the control electronics CE turns on the electronic switch Q2. The Relay RY2 picks up and contact C2-NO2 is closed.
Das Relais RY2 wird über die Diode D1 und den Widerstand R2 kontinuierlich mit Spannung versorgt, so daß das Relais RY2 im angezogenen Zustand verbleiben kann. Das Gasventil MV wird dann über den Kondensator C1 geschlossen.The relay RY2 is continuously supplied with voltage via the diode D1 and the resistor R2 supplied so that the relay RY2 can remain energized. The gas valve MV is then closed via capacitor C1.
Die erfindungsgemäßen Schaltungsanordnungen nach den Ausführungsbeispielen gemäß Figuren 1 bis 4 und 6 verfügen also über zwei Lade-Schaltkreise für den Ladekondensator C5:The circuit arrangements according to the invention according to the embodiments Figures 1 to 4 and 6 thus have two charging circuits for the charging capacitor C5:
Erstens von der Netzwechselspannungsleitung L über Widerstand R1 und Diode D3 sowie Widerstand R5 auf Ladekondensator C5.First, from the AC line L through resistor R1 and diode D3 as well Resistor R5 on charging capacitor C5.
Zweitens von der Netzwechselspannungsleitung L über Widerstand R4 und Diode D2 sowie Diode D1 und Widerstand R2 auf Ladekondensator C5.Second, from the AC line L through resistor R4 and diode D2 as well Diode D1 and resistor R2 on charging capacitor C5.
Claims (7)
- , Control circuit for a gas valve with:a) a relay (RY2), the relay (RY2) having a changeover contact with actuating arm (C2), normally open contact (NO2) and normally closed contact (NO2), the actuating arm (C2) being connected to the one power-supply line (L),b) a charging capacitor (C5) together with charging resistor (R5),c) an electronic switch (Q2) connected in series to the relay (RY2), this series connection (RY2, Q2) being connected in parallel with the charging capacitor (C5), and the charging capacitor (C5) being connected by a contact remote from the charging resistor (R5) to the other power-supply line (N),d) a first electric circuit consisting of a resistor (R2) and a diode (D1) connected in series to the resistor (R2) for the relay (RY2),e) a control electronics (CE), a control electrode of the electronic switch (Q2) being connected to the output (A) of the control electronics (CE) and the input (E) of the control electronics (CE) being connected to an exciting winding of the relay (RY2),f) an additional capacitor (C1) connected between a contact (NO2) of the relay (RY2) and a first terminal (L1) of the exciting winding of the gas valve (MV), and by two charging circuits (R1, D3, R5; R4, D2, D1, R2) for the charging capacitor (C5).
- Control circuit according to Claim 1, characterized in that a second terminal (L2) of the exciting winding of the gas valve is connected via the charging resistor (R5) to the charging capacitor (C5).
- Control circuit according to Claim 1 or Claim 2, characterised in that the capacitor (C1) acts upon the normally open contact (NO2), the actuating arm (C2) of the changeover contact being connected to the one power-supply line (L), and the normally open contact (NO2) of the relay (RY2) feeding the circuit (D1, R2).
- Control circuit according to one or more of Claims 1 to 3, characterized by a further electric circuit consisting of a resistor (R4) and a diode (D2) connected in series to the resistor (R4) to form the first charging circuit (R4, D2, D1, R2), the diode (D2) connecting to the additional capacitor (C1) and to the first circuit (D1, R2), and the resistor (R4) leading either to the normally closed contact (NC2) or to the actuating arm (C2) of the changeover contact
- Control circuit according to one or more of Claims 1 to 4, characterized by a third electric circuit consisting of a resistor (R1) and a diode (D3) connected in series to the resistor (R1) to form the second charging circuit (R1, D3, R5), the resistor (R1) leading either to the normally closed contact (NC2) or to the actuating arm (C2) of the changeover contact.
- Control circuit according to Claim 5, characterized in that the diode (D3) acts either together with the capacitor (C1) on the first terminal (L1) of the exciting winding of the gas valve (MV) or on the second terminal (L2) of the exciting winding of the gas valve (MV).
- Control circuit according to Claim 5, characterized in that the diode (D3) acts on a diode (D14) of a rectifier circuit (D11, D12, D13, D14) associated with the gas valve (MV).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00102821A EP1126219B1 (en) | 2000-02-11 | 2000-02-11 | Control circuit |
DE50000553T DE50000553D1 (en) | 2000-02-11 | 2000-02-11 | control circuit |
AT00102821T ATE225017T1 (en) | 2000-02-11 | 2000-02-11 | CONTROL CIRCUIT |
CZ200111662U CZ11545U1 (en) | 2000-02-11 | 2001-02-09 | Control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00102821A EP1126219B1 (en) | 2000-02-11 | 2000-02-11 | Control circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1126219A1 EP1126219A1 (en) | 2001-08-22 |
EP1126219B1 true EP1126219B1 (en) | 2002-09-25 |
Family
ID=8167825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00102821A Expired - Lifetime EP1126219B1 (en) | 2000-02-11 | 2000-02-11 | Control circuit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1126219B1 (en) |
AT (1) | ATE225017T1 (en) |
CZ (1) | CZ11545U1 (en) |
DE (1) | DE50000553D1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2220313T3 (en) * | 2000-10-06 | 2004-12-16 | Honeywell B.V. | CONTROL CIRCUIT. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59400955D1 (en) | 1994-08-24 | 1996-12-05 | Honeywell Bv | Gas burner control circuit with monitoring of the combustion air supply |
DE59700550D1 (en) * | 1997-01-22 | 1999-11-18 | Honeywell Bv | Control circuit for gas valve with monitoring of the combustion air supply |
JP3013798B2 (en) | 1997-01-23 | 2000-02-28 | 株式会社村田製作所 | Crossing track |
-
2000
- 2000-02-11 DE DE50000553T patent/DE50000553D1/en not_active Expired - Lifetime
- 2000-02-11 EP EP00102821A patent/EP1126219B1/en not_active Expired - Lifetime
- 2000-02-11 AT AT00102821T patent/ATE225017T1/en not_active IP Right Cessation
-
2001
- 2001-02-09 CZ CZ200111662U patent/CZ11545U1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CZ11545U1 (en) | 2001-09-25 |
EP1126219A1 (en) | 2001-08-22 |
DE50000553D1 (en) | 2002-10-31 |
ATE225017T1 (en) | 2002-10-15 |
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