EP0803680B1 - Circuit et procédé pour surveiller un appareil chauffé au fuel - Google Patents

Circuit et procédé pour surveiller un appareil chauffé au fuel Download PDF

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Publication number
EP0803680B1
EP0803680B1 EP97105891A EP97105891A EP0803680B1 EP 0803680 B1 EP0803680 B1 EP 0803680B1 EP 97105891 A EP97105891 A EP 97105891A EP 97105891 A EP97105891 A EP 97105891A EP 0803680 B1 EP0803680 B1 EP 0803680B1
Authority
EP
European Patent Office
Prior art keywords
signal
circuit arrangement
control device
arrangement according
safety
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97105891A
Other languages
German (de)
English (en)
Other versions
EP0803680A2 (fr
EP0803680A3 (fr
Inventor
Klaus Krieger
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0803680A2 publication Critical patent/EP0803680A2/fr
Publication of EP0803680A3 publication Critical patent/EP0803680A3/fr
Application granted granted Critical
Publication of EP0803680B1 publication Critical patent/EP0803680B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/30—Representation of working time

Definitions

  • the invention relates to a method for monitoring a fuel-heated device with a control device, the at least one safety-relevant input signal is supplied, and with a safety device that a switching device for Switching off at least one valve in a fuel supply, the Shutdown depending on the safety-relevant input signal and / or one Test signal from the control device takes place.
  • the invention further relates to a circuit arrangement for monitoring a fuel-heated device with a control device, the at least one safety-relevant input signal is supplied, and a safety arrangement that a counting device supplied with a clock and a switching device for Switching off at least one valve in a fuel supply, the Shutdown depends on the safety-relevant input signal Control device and a counter reading of the counting device.
  • Such a circuit arrangement for monitoring a fuel-heated device with a control device and a safety device is from EP 315 053 A1 known.
  • the control device receives safety-relevant input signals fed.
  • the safety device has a clocked one Counting device and a switching device for switching off a valve in one Fuel supply on. The valve is switched off depending on the safety-relevant input signals from the control device and from a meter reading the counting device.
  • Another circuit arrangement for monitoring a fuel-heated device is known from DE 41 11 947 A1.
  • the device is switched off in the event of a detected fault by means of a safety circuit, which has a thermal bimetal switch. This enables a delayed switching of the valve, the delayed switching being necessary in particular in the ignition phase.
  • thermal bimetal switch is especially its high price and its sluggish Response.
  • reset of the switch after repeated switching due to the high temperature after a long time Duration possible.
  • Another device for monitoring at least a safety-relevant function of a fuel-heated Device is from DE 43 42 903 A1 known.
  • two microprocessors provided the states of the Determine device and / or error and in each case store a memory. However, the device is then turned off when a comparison match of the states stored in both memories or shows errors.
  • the present invention has for its object the functionality of a Improve the safety device of fuel-heated devices.
  • the circuit arrangement according to the invention with the characterizing features of Claim 2 has the advantage that in addition to monitoring security-relevant Input signals a check of the control device is given.
  • a linking device is particularly advantageous, which is the security relevant Input signal, that originating from the control device Test signal and one from a clock generator generated clock signal are supplied. So that is it is possible in a circuit-technically simple way, the clock signal depends on the other two signals to the downstream counting device. It is particularly advantageous, depending on Constellation of the input signal and the test signal the counting device a clock signal for incrementing or a clock signal for decrementing supply. The two preferably differ Clock signals with regard to their clock frequency.
  • a divider device which is preferably the clock frequency by one selectable divider.
  • Figure 1 shows a circuit arrangement 1, for example Part of an automatic burner control unit is. It comprises a control device 3, one with a broken line edged safety device 5 as well two solenoid valves 7.1 and 7.2 that are not on one shown gas supply line leading to a burner Act.
  • the two solenoid valves 7 are common Supply line 9 with the positive pole Power supply and with separate lines 11.1 and 11.2 connected to ground.
  • the supply line 9 is via a switch 13 and a switch 15 arranged in series therewith interruptible. Also in the two supply lines 11.1, 11.2 is a switch 17.1, respectively 17.2 arranged.
  • the voltage drop across the two solenoid valves 7 is via an amplifier 19 as a solenoid valve voltage signal via a line 21 to the Control device 3 passed.
  • this signal as one of several safety-relevant Input signals from the safety device 5 to.
  • an ionization signal which over a Line 25 of the control device 3 and a line 27 of the safety device 5 is supplied.
  • the control device 3 can be connected via a line 29 that supplied by the flame monitoring device Block signal in an amplifier 31 for testing purposes.
  • the control device receives a further input signal 3 a heat request via a line 33, which causes the burner to ignite.
  • FIG. 1 also shows that the safety device 5 from several functional units is composed.
  • the two supplied via lines 23 and 27 safety-relevant input signals are combined with a transmitted via a line 35 Test signal processed in a linking device 37.
  • the first clock signal is sent over a line 45 and the second clock signal via a line 47 the linking device 37 supplied.
  • the clock signals themselves are generated by a clock generator 49 generated, the clock frequency for both Clock signals reduced by a pre-divider 51 becomes.
  • the clock frequency of the second clock signal by means of a switching device 53 vary. Switching between the present Case four different frequencies is by two control lines 55.1 and 55.2 the control device 3 accomplishes.
  • the first three in the exemplary embodiment in total four outputs Q0, Q1 and Q2 of counter 43 are fed to an AND gate 57 while the fourth output signal Q3 is fed to an AND gate 59 is.
  • This AND gate 59 receives second Input signal the output signal of the AND gate 57.
  • the output signal of the second AND gate 59 then serves to control a bistable relay 61, which operates the aforementioned switch 13. There it is a bistable relay Downshifting an unlocking device 63 provided that by pressing a button 65th the relay switches back to a state in which the switch 13 is closed.
  • the output signal of the first AND gate 57 becomes via a line 67.1 and the fourth output signal Q3 of the counter 43 via a line 67.2 Control device 3 supplied.
  • the two double arrows at the ends of these two lines indicate that the control device 3 is also active can control the AND gate 59 for test purposes.
  • the output signal of the AND gate 59 of a monitoring device 69 is supplied.
  • Such watchdogs are well known and check periodically Events within a given time window, for example the periodicity of trigger pulses.
  • the mentioned time window is thereby by the clock generator 49 and the pre-divider 51 specified.
  • the test signal is generated and via the line 35 passed to the linking device 37.
  • relay 81 not as bistable, but as monostable Relay is designed. This makes it necessary to design the switch 13 as a changeover switch, either the supply line 9 or a lead 83 to the relay 81 with the The positive pole of the supply voltage connects.
  • control device 3 is a Memory chip 86, preferably an EEPROM, assigned.
  • the unlocking device 63 formed only as a button 65
  • the one Line 97 supplies a reset signal to counter 43.
  • the control device 3 an unlocking signal is supplied via a line 99.
  • the circuit arrangement 1 has two independently mutually working ways to switch off the Burner. So the solenoid valves 7 either via the switch 17 from the control device 3 or together via the switch 13 by the security device 5 close.
  • the counter 43 is provided, which after opening the valves 7 first counts up, and the relay 61 not yet triggers. Only after reaching the the AND gate 57.59 specific count the switch 13 opened.
  • the Clock generator 49 and the interconnection of the outputs of the counter 43 so designed that there is a delay time of about 10 seconds. detected the flame monitor inside this time period a flame, the corresponding one Signal from the link device 37 processed and the supply of the clock signal to Payer 43 interrupted. Rather, it is in this state the counter decrements until it gets the smallest Has reached value.
  • the safety device 5 also leads monitoring of the control device 3 by.
  • Control device 3 generated trigger pulse so is short that the relay 61 does not affect becomes.
  • the control device generates to test the watchdog 69 3 one that does not fit into the time window Trigger pulse that is used to generate a test signal and leads to the counting up of the counter 43.
  • a Functionality of the counter 43 is then present if the control device 3 first has an output signal at AND gate 57 via line 67.1 and shortly thereafter a signal at output Q3 of counter 43 detected via line 67.2.
  • the Watchdogs 69 but not one in time wrong trigger pulse, but no trigger pulse is produced. In this case too the functionality through the successively detected Signals via lines 67.1 and 67.2 approved.
  • the shutdown takes place by the safety device 5, for example only in the case of safety errors of class C, where for all other security errors the Control device 3 via the switch 17 a shutdown causes.
  • the safety device 5 for example only in the case of safety errors of class C, where for all other security errors the Control device 3 via the switch 17 a shutdown causes.
  • the safety device 5 for example only in the case of safety errors of class C, where for all other security errors the Control device 3 via the switch 17 a shutdown causes.
  • the unlocking of the bistable relay 61 according to the figure 1 takes place via the unlocking device 63 and the button 65, through which one in reverse Directed current flowing through the relay is so that the switch 13 is included in the Position switches back.
  • the unlocking device 63 it is possible to unlock only after expiration a certain time, for example two seconds, to enable.
  • a simple realization would be an RC switching element in this case.
  • the switches 17 are also unlocked via a button, not shown, or a data line, the control device 3 the command transmitted to close the switch 17.
  • the watchdog 69 and the digital one Logic part of the circuit arrangement 1 discrete with just a few CMOS logic ICs.
  • CMOS logic ICs complementary metal-oxide-semiconductor
  • the watchdog 69 and the digital one Logic part of the circuit arrangement 1 discrete with just a few CMOS logic ICs.
  • programmable logic modules semiconductor-oxide-semiconductor-semiconductor

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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)

Claims (15)

  1. Procédé pour le contrôle d'un montage destiné à surveiller un appareil chauffé par combustible, comprenant un dispositif de commande (3) auquel est transmis au moins un signal d'entrée intervenant pour la sécurité, et un dispositif de sécurité (5) qui comprend un dispositif de comptage (43) alimenté en cadence et un montage (13) destiné à couper au moins une vanne (7.1, 7.2) intercalée dans une arrivée de combustible, la coupure s'effectuant en fonction du signal d'entrée intervenant pour la sécurité du dispositif de commande (3) et d'un état de compteur du dispositif de comptage,
    caractérisé en ce que
    le dispositif de commande (3) surveille au moins deux sorties (67.1, 67.2) du dispositif de comptage (43), et en déduit l'absence de défaut du montage lorsque, après la génération d'un signal de contrôle, le dispositif de commande (3) détecte tout d'abord un signal à une sortie (67.1) du dispositif de comptage (43) et, juste après, un signal sur l'autre sortie (67.2) du dispositif de comptage.
  2. Montage pour la surveillance d'un appareil chauffé par combustible, comprenant un dispositif de commande (3) auquel est transmis au moins un signal d'entrée intervenant pour la sécurité et un dispositif de sécurité (5) qui présente un dispositif de comptage (43) alimenté en cadence et un dispositif de commutation (13) destiné à couper au moins une vanne (7.1, 7.2) intercalée dans une arrivée de combustible, la coupure dépendant du signal d'entrée intervenant pour la sécurité du dispositif de commande (3) et d'un état de compteur du dispositif de comptage,
    caractérisé en ce que
    le dispositif de commande (3) est relié à au moins deux sorties (67.1, 67.2) du dispositif de comptage (43) pour détecter une succession déterminée de signaux de sortie, et un signal de contrôle qui amène le dispositif de comptage (43) à compter peut être généré au moyen du dispositif de commande (3).
  3. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de commutation (13) est réalisé sous la forme d'un interrupteur à semi-conducteur, et il est prévu des moyens (91, 93) qui interrompent l'alimentation en cadence du dispositif de comptage lorsque l'interrupteur à semi-conducteur est ouvert.
  4. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de commutation est un relais (61), de préférence un relais bistable.
  5. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de commutation (13) est constitué par un interrupteur à semi-conducteur, de préférence un interrupteur à semi-conducteur Highside.
  6. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de sécurité (5) présente un dispositif de combinaison (37) auquel sont transmis le signal d'entrée intervenant pour la sécurité, le signal de contrôle et au moins un signal cadencé, le signal cadencé étant transmis au dispositif de comptage (43) en fonction du signal d'entrée et du signal de contrôle.
  7. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de comptage est construit pour compter en montant et en descendant.
  8. Montage selon la revendication 7,
    caractérisé en ce que
    le dispositif de combinaison (37) reçoit deux signaux cadencés de fréquences différentes, un signal cadencé étant utilisé pour le comptage en montant et l'autre signal cadencé pour le comptage en descendant, selon les signaux présents sur le dispositif de combinaison (37).
  9. Montage selon la revendication 2,
    caractérisé en ce que
    deux signaux d'entrée intervenant pour la sécurité sont envoyés au dispositif de sécurité (5), un signal étant produit par un dispositif de surveillance de la flamme et l'autre signal par la vanne (7).
  10. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de comptage (43) présente un dispositif diviseur (51) auquel le signal cadencé est transmis par un générateur de cadence (49) et qui transmet un ou deux signaux cadencés au dispositif de combinaison (37).
  11. Montage selon la revendication 10,
    caractérisé en ce que
    le rapport de division du dispositif diviseur (51) peut être choisi librement.
  12. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de commutation (61, 13) désactive le générateur de cadence (49) dans l'état déconnecté.
  13. Montage selon la revendication 2,
    caractérisé en ce qu'
    il est prévu un dispositif de déverrouillage (63) qui remet le dispositif de comptage (43) à zéro et qui met à l'état actif le dispositif de commutation (61, 13).
  14. Montage selon la revendication 2,
    caractérisé en ce qu'
    il est prévu un dispositif de combinaison additionnel (57, 59) auquel sont transmis les signaux de sortie du dispositif de comptage (43) et qui, en fonction de ces signaux, génère un signal de sortie et le transmet au dispositif de commutation (61).
  15. Montage selon la revendication 2,
    caractérisé en ce que
    le dispositif de sécurité (5) comprend un dispositif de contrôle (69) qui reçoit un signal, de préférence périodique, du dispositif de commande (3) et, en fonction de ce signal, produit le signal de contrôle.
EP97105891A 1996-04-23 1997-04-10 Circuit et procédé pour surveiller un appareil chauffé au fuel Expired - Lifetime EP0803680B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19616065 1996-04-23
DE19616065A DE19616065A1 (de) 1996-04-23 1996-04-23 Schaltungsanordnung zum Überwachen eines brennstoffbeheizten Gerätes

Publications (3)

Publication Number Publication Date
EP0803680A2 EP0803680A2 (fr) 1997-10-29
EP0803680A3 EP0803680A3 (fr) 1999-07-21
EP0803680B1 true EP0803680B1 (fr) 2003-07-09

Family

ID=7792132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105891A Expired - Lifetime EP0803680B1 (fr) 1996-04-23 1997-04-10 Circuit et procédé pour surveiller un appareil chauffé au fuel

Country Status (2)

Country Link
EP (1) EP0803680B1 (fr)
DE (2) DE19616065A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009036423A1 (de) * 2009-08-06 2011-02-17 Robert Bosch Gmbh Verbrennungssystem, Gasfeuerungsautomat, sowie Vorrichtung und Verfahren zur Unterbrechung einer Brennstoffzufuhr hierfür

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19825846A1 (de) * 1998-06-10 1999-12-16 Agt Gas Technology Gmbh Vorrichtung zum Sichern einer Gasbrennstelle
ES2155404B1 (es) * 1999-07-23 2001-12-01 Fagor S Coop Circuito de control para encimeras de gas con sistema de seguridad ante doble fallo.
DE10028989A1 (de) * 2000-06-16 2001-12-20 Siemens Building Tech Ag Eingangsschaltung für einen Brenner
JP3419752B2 (ja) * 2000-10-19 2003-06-23 アール・ビー・コントロールズ株式会社 燃焼制御装置
EP1571395A1 (fr) * 2004-03-02 2005-09-07 Riello S.p.a. Dispositif de contrôle de flamme de brûleur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2247918C3 (de) * 1972-09-29 1979-03-22 Otto Dold, Temperaturmess- Und Regelgeraete, 7012 Schmiden Sicherheitsschaltung fur Feuerungsautomaten in Gas- und ölfeuerungsanlagen
US4695246A (en) * 1984-08-30 1987-09-22 Lennox Industries, Inc. Ignition control system for a gas appliance
EP0315053B1 (fr) * 1987-11-06 1994-02-09 Joh. Vaillant GmbH u. Co. Automate de brûleur
CH681039A5 (fr) * 1990-03-23 1992-12-31 Landis & Gyr Betriebs Ag
DE4111947A1 (de) * 1991-04-12 1992-10-15 Bosch Gmbh Robert Schaltungsanordnung und verfahren zum ueberwachen eines brennstoffbeheizten geraetes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009036423A1 (de) * 2009-08-06 2011-02-17 Robert Bosch Gmbh Verbrennungssystem, Gasfeuerungsautomat, sowie Vorrichtung und Verfahren zur Unterbrechung einer Brennstoffzufuhr hierfür
DE102009036423B4 (de) * 2009-08-06 2013-03-28 Robert Bosch Gmbh Verfahren und Vorrichtung zur Unterbrechung einer Brennstoffzufuhr sowie deren Verwendung
DE102009036423C5 (de) 2009-08-06 2023-03-02 Robert Bosch Gmbh Verfahren und Vorrichtung zur Unterbrechung einer Brennstoffzufuhr sowie deren Verwendung

Also Published As

Publication number Publication date
EP0803680A2 (fr) 1997-10-29
EP0803680A3 (fr) 1999-07-21
DE19616065A1 (de) 1997-11-06
DE59710396D1 (de) 2003-08-14

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