EP0867660B1 - Vorrichtung zum Überwachen eines Brenners - Google Patents
Vorrichtung zum Überwachen eines Brenners Download PDFInfo
- Publication number
- EP0867660B1 EP0867660B1 EP98104241A EP98104241A EP0867660B1 EP 0867660 B1 EP0867660 B1 EP 0867660B1 EP 98104241 A EP98104241 A EP 98104241A EP 98104241 A EP98104241 A EP 98104241A EP 0867660 B1 EP0867660 B1 EP 0867660B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- amplifier circuit
- voltage
- resistor
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
- F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
Definitions
- the invention is based on a device for monitoring a burner according to the preamble of the independent claim.
- AU 510 294 B is a device for monitoring a Burner with a sensor for detecting a flame of the Brenners known that an amplifier circuit and a Has voltage source.
- the sensor and the amplifier circuit are supplied by the voltage source, whereby as AC source is used.
- the circuit part containing the sensor is via a complex voltage divider connected to the mains AC voltage.
- the amplifier circuit is over one Protection resistor directly on the network.
- EP 634 611 A1 Another device for monitoring a burner with a sensor for detecting a flame of the burner and with an amplifier circuit, to which the signal from the sensor is fed is known from EP 634 611 A1.
- both the sensor and the amplifier circuit from one 24 volt AC power source supplied.
- the sensor is over a capacitor and the amplifier circuit through a resistor connected to the AC voltage source.
- the invention has for its object a simplified Circuit arrangement for monitoring the flame of a burner specify which is supplied with a mains AC voltage, however, without an internal supply of a DC voltage source gets along.
- the object is achieved with the device according to the invention Monitor a burner according to the characteristic features of claim 1, wherein both the sensor and the amplifier circuit via a complex voltage divider connected to the voltage source and to the most complex Voltage dividers occurring AC are supplied. This eliminates the need to provide an internal one DC. In addition, using a complex voltage divider through targeted voltage increases achieved higher sensor currents. The sensitivity the sensor signal evaluation also improves.
- An advantageous embodiment is, for example, that between voltage source and sensor as impedance an ohmic resistor and / or a capacitance is used are. With the help of the impedance, the desired one Set the amplitude of the supply voltage for the sensor.
- FIG. 1 shows a block diagram
- FIGS. 2 and 3 Circuit arrangements of exemplary embodiments.
- a sensor 10 monitors a flame of a burner 12 is grounded. With the sensor 10 are parallel to each other switched first capacitance 24 and second resistor 26 electrically connected. Their shared potential is fed to an amplifier circuit 14. A second common potential of first capacitance 24 and second Resistor 26 forms a further input variable Amplifier circuit 14. The second common potential serves the amplifier circuit 14 as in a third Connection supplied supply. Over an impedance 20 is the second potential is connected to a first terminal L, which is supplied by a voltage source 16. A second Connection of the voltage source 16 is a second terminal N fed. Via a first resistor 18 Amplifier circuit 14 connected to the second terminal N.
- the signal from sensor 10 is transmitted via a sixth and seventh resistors 44, 46 with a first common potential of the first capacitance 24, a first Zener diode 28, the second resistor 26 and a gate connection an amplifier 30 A connected.
- On one second common potential are first capacitance 24, first zener diode 28, second resistor 26, source connection of the amplifier 30 A, second Zener diode 36, eighth Resistor 48 and electrical isolation 34.
- a fourth Resistor 40 connects a base of a bipolar transistor 32 with the drain of the amplifier 30 A.
- a third Resistor 38 is between the drain terminal of amplifier 30 A and a potential on which a second connection of the second zener diode 36 and the collector of Bipolar transistor 32 are arranged. That potential is via the first resistor 18 to the second terminal N. connected.
- the potential separation 34 gives an output signal 22 from.
- a second connection of the eighth resistor 48 is contacted with the first terminal L.
- the amplifier circuit 14 according to FIG. 3 differs from that of Figure 2 in that as an amplifier 30 B.
- Darlington transistor is used. Whose Collector connection is immediately with the potential isolation 34 connected.
- a second capacity replaces 50 den eighth resistor 48.
- the voltage source 16 secures both the Power supply to the sensor 10 and the Amplifier circuit 14.
- the desired ones Tensions can be determined from the Impedance 20 and the first resistor 18 formed Set the voltage divider. Will be held as an impedance 20 eighth resistor 48 can use the second capacitance 50 a voltage increase can thereby be realized.
- impedance 20 and first resistor 18 can also refer to the Arrangement according to Figure 1 can be interchanged.
- the sensor 10 monitors the flame of the burner 12.
- the sensor 10 can be formed as a simple, in the flame area extending electrode, for example in the form of a Wire, be formed. If the sensor 10 with a Voltage supplied in the manner described flows in an existing ionization current against earth. The ionizing effect of the flame leaves only one Current flow in one direction. If there is no flame, the Ionization current prevented.
- the path to sensor 10 is high-resistance.
- the diode effect of the ionization path does not come with it to carry.
- the second resistor 26 serves as Base load to at very small ionization current, for example less than 0.3 ⁇ A, the input signal for to adjust the amplifier circuit 14 in such a way that at this current flow is concluded that there is no flame.
- the first capacitance 24 is loaded onto a certain tension on.
- the rectifier property of Flame prevents discharge.
- the one in the first Capacity 24 stored voltage is the Amplifier circuit 14 supplied and evaluated. That from the output signal 22 generated by the amplifier circuit 14 indicates whether there is a flame or not.
- the amplifier 30 A is as self-conducting field effect transistor, for example a Junction field effect transistor.
- Capacitance 24 If the flame of the burner 12 burns, the first one charges Capacitance 24 to a voltage. This tension lies between gate and source of the amplifier 30 A. The drain-source route becomes high impedance, so that the Current amplification for the optocoupler LED serving Bipolar transistor 32 switches. Through the optocoupler LED of the Isolation 34 then flows during each positive Half wave a current. The associated recipient of the Potential separation 34 recognizes on the basis of the pulsating DC signal that a flame is present.
- the second zener diode 36 protects potential isolation 34 and Bipolar transistor 32 from overvoltages.
- the first and eighth resistance lie in a realization 18, 48 in the order of 40 k ⁇ , third resistor 38 at 50 k ⁇ , fourth resistor 40 at 200 k ⁇ and first Capacitance 24 at 100 nF.
- a Darlington transistor serves as amplifier 30B two for reasons of higher current gain according to the Darlington circuit contains arranged transistors. On the circuit for processing the sensor signal changes nothing. If there is a flame, the first one loads Capacity 24 on. In this case, amplifier 30 switches B through so that the LED of potential isolation 34 with each positive half wave to the receiver an existing flame signaled. If there is no flame, the amplifier 30 blocks B. This is a current flow through the LED Isolation 34 prevented.
- the circuit arrangements can be advantageous in use public power supply network.
- a mix up the connections of phase L and neutral conductor N are straightforward possible.
- the network instead of the network as a voltage source 16 there is one Generation of an oscillating voltage with, for example Possible with the help of a transformer.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Fire-Detection Mechanisms (AREA)
Description
Claims (10)
- Vorrichtung zum Überwachen eines Brenners (12), mit mindestens einem Sensor (10) zum Erfassen einer Flamme des Brenners (12), mit einer Verstärkerschaltung (14), der das Signal des Sensors (10) zugeführt ist, und mit einer Spannungsquelle (16), die den Sensor (10) und die Verstärkerschaltung (14) versorgt, wobei als Spannungsquelle eine vorhandene Netz-Wechselspannung vorgesehen ist, dadurch gekennzeichnet, dass der Sensor (10) und die Verstärkerschaltung (14) über einen komplexen Spannungsteiler (20, 18) mit der Spannungsquelle (16) verbunden sind und dass sowohl der Sensor (10) als auch die Verstärkerschaltung (14) mit der am komplexen Spannungsteiler (20, 18) auftretenden Wechselspannung versorgt sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Sensor (10) und die Verstärkerschaltung (14) zwischen eine mit einem ersten Anschluß (L) der Spannungsquelle (16) verbundenen Impedanz (20) und einen mit dem zweiten Anschluß (N) der Spannungsquelle (16) verbundenen Widerstand (18) geschaltet sind.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass als Impedanz (20) ein ohmscher Widerstand (48) und/oder ein Kondensator (50) verwendet sind.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Kondensator so dimensioniert ist, dass dessen Blindwiderstand bei der Frequenz der Netz-Wechselspannung wenigstens näherungsweise so groß ist, wie der Wert des Widerstands (18).
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Verstärkerschaltung zumindest einen Transistor (30B, 32) enthält.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Transistor (30B) ein Darlington-Transistor ist.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass zwischen Impedanz (20) und Sensor (10) ein Kondensator (24) geschaltet ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Verstärkerschaltung (14) ausgangsseitig eine Potentialtrennung (34) enthält.
- Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Potentialtrennung (34) Halbwellen der Netzwechselspannung überträgt.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Potentialtrennung (34) als Opto-Koppler realisiert ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712373A DE19712373A1 (de) | 1997-03-25 | 1997-03-25 | Vorrichtung zum Überwachen eines Brenners |
DE19712373 | 1997-03-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0867660A1 EP0867660A1 (de) | 1998-09-30 |
EP0867660B1 true EP0867660B1 (de) | 2003-06-04 |
Family
ID=7824481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98104241A Expired - Lifetime EP0867660B1 (de) | 1997-03-25 | 1998-03-10 | Vorrichtung zum Überwachen eines Brenners |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0867660B1 (de) |
DE (2) | DE19712373A1 (de) |
ES (1) | ES2201353T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10027846A1 (de) * | 2000-05-25 | 2001-11-29 | Siemens Building Tech Ag | Signalgeber |
DE10125574A1 (de) * | 2001-05-25 | 2002-11-28 | Siemens Building Tech Ag | Flammenüberwachungsvorrichtung |
ITTO20090019A1 (it) * | 2009-01-14 | 2010-07-15 | Bitron Spa | Dispositivo circuitale per la rilevazione della fiamma in un bruciatore di gas |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1277402A (en) * | 1968-08-27 | 1972-06-14 | United Gas Industries Ltd | Flame detection system |
US3610789A (en) * | 1969-09-30 | 1971-10-05 | Eaton Yale & Towne | Flame rod safety control system |
AU510294B2 (en) * | 1975-11-13 | 1980-06-19 | P.I.L. | Circuit arrangement for monitoring presence of gas flames |
CH627831A5 (en) * | 1978-05-16 | 1982-01-29 | Landis & Gyr Ag | Flame monitor connected to an AC voltage |
DE3308675C2 (de) * | 1983-03-11 | 1986-02-27 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Feuerungsautomat |
CH663077A5 (de) * | 1983-12-14 | 1987-11-13 | Landis & Gyr Ag | Selbstueberwachender flammenwaechter. |
GB2156103A (en) * | 1984-03-12 | 1985-10-02 | Emerson Electric Co | Direct ignition gas burner control system |
DE4122636C2 (de) | 1991-07-09 | 1999-08-12 | Bosch Gmbh Robert | Vorrichtung und Verfahren zum Überwachen einer Flamme |
US5439374A (en) * | 1993-07-16 | 1995-08-08 | Johnson Service Company | Multi-level flame curent sensing circuit |
-
1997
- 1997-03-25 DE DE19712373A patent/DE19712373A1/de not_active Ceased
-
1998
- 1998-03-10 DE DE59808564T patent/DE59808564D1/de not_active Expired - Lifetime
- 1998-03-10 EP EP98104241A patent/EP0867660B1/de not_active Expired - Lifetime
- 1998-03-10 ES ES98104241T patent/ES2201353T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0867660A1 (de) | 1998-09-30 |
DE59808564D1 (de) | 2003-07-10 |
ES2201353T3 (es) | 2004-03-16 |
DE19712373A1 (de) | 1998-10-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE4123725C2 (de) | Vorrichtung zum Prüfen der Isolierung eines elektrischen Leiters auf Fehlerstellen | |
DE102006054354B4 (de) | Selbstschützende Crowbar | |
DE102006008292B4 (de) | Überlastschutz für steuerbare Stromverbraucher | |
DE2232625C3 (de) | Geregelter Gleichspannungswandler | |
DE2730874A1 (de) | Strommessystem, insbesondere zur verwendung als fehlerstrom-detektionssystem und mit einem solchen system ausgeruestete funktionelle vorrichtung, z.b. fehlerstromschutzschalter | |
DE3535864C2 (de) | ||
EP0867660B1 (de) | Vorrichtung zum Überwachen eines Brenners | |
DE2700274A1 (de) | Stromversorgungseinrichtung fuer bildverstaerker | |
EP0622902B1 (de) | Halbleiterrelais | |
DE3043053C1 (de) | Schaltungsanordnung zur Auswertung von Signalen | |
DE4033856C2 (de) | ||
DE3506744A1 (de) | Ueberspannungsschutzschaltung fuer breitbandige digitale leitungssysteme | |
EP0107133B1 (de) | Schaltungsanordnung zum Speisen einer eine konstante Betriebsspannung liefernden Stromversorgungseinrichtung | |
DE3125105C2 (de) | Schaltung in einem Fernsprechapparat zum Speisen eines Tastenwahlblocks | |
DE4013490C2 (de) | Prüfgerät mit einer Gleichstromquelle | |
DE2516853A1 (de) | Steuereinrichtung fuer messchaltungen fuer die spannung an kraftleitungen | |
DE4444345A1 (de) | Sicherheitsbarriere für hohe Datenraten | |
DE2935528C2 (de) | Einrichtung zum Messen und/oder Anzeigen eines elektrischen Widerstandswerts | |
DE3707973C2 (de) | ||
DE3505634A1 (de) | Schaltungsanordnung zur speisung von zusatzeinrichtungen eines fernsprechapparates aus dem schleifenstrom | |
DE19627730B4 (de) | Testeinrichtung zur Überprüfung der Funktionsweise eines Hochfrequenz-Erdungsmeßgerätes | |
DE2525632B2 (de) | Ueberspannungsschutzschaltungsanordnung fuer eine halbleiterschaltung, insbesondere fuer mos-transistorschaltung, aus dioden und widerstaenden | |
DE1588775C (de) | Schaltungsanordnung zur selektiven Aus regelung von Pegelschwankungen einer Ein gangswechselspannung | |
DE2842634A1 (de) | Leitungs-stromversorgungsschaltung | |
DE2847022A1 (de) | Durchgangspruefer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT NL |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 19990330 |
|
AKX | Designation fees paid |
Free format text: DE ES FR GB IT NL |
|
17Q | First examination report despatched |
Effective date: 20000515 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): DE ES FR GB IT NL |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 59808564 Country of ref document: DE Date of ref document: 20030710 Kind code of ref document: P |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2201353 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20040305 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 59808564 Country of ref document: DE Effective date: 20121205 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20170323 Year of fee payment: 20 Ref country code: NL Payment date: 20170323 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20170327 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20170529 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20170323 Year of fee payment: 20 Ref country code: ES Payment date: 20170323 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59808564 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MK Effective date: 20180309 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20180309 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20180309 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20200805 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20180311 |