EP2439451B1 - Dispositif de détection de la présence d'une flamme - Google Patents

Dispositif de détection de la présence d'une flamme Download PDF

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Publication number
EP2439451B1
EP2439451B1 EP10013450.1A EP10013450A EP2439451B1 EP 2439451 B1 EP2439451 B1 EP 2439451B1 EP 10013450 A EP10013450 A EP 10013450A EP 2439451 B1 EP2439451 B1 EP 2439451B1
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European Patent Office
Prior art keywords
tubes
tube
flame
voltage
time
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EP10013450.1A
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German (de)
English (en)
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EP2439451A1 (fr
Inventor
Kurt-Henry Dr. Mindermann
Jens Michael Mindermann
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BFI Automation Mindermann GmbH
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BFI Automation Mindermann GmbH
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Priority to EP10013450.1A priority Critical patent/EP2439451B1/fr
Priority to PL10013450T priority patent/PL2439451T3/pl
Priority to ES10013450.1T priority patent/ES2446317T3/es
Priority to DK10013450.1T priority patent/DK2439451T3/da
Priority to US13/317,002 priority patent/US8618493B2/en
Publication of EP2439451A1 publication Critical patent/EP2439451A1/fr
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Publication of EP2439451B1 publication Critical patent/EP2439451B1/fr
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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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements 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
    • F23N5/24—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
    • F23N2229/00—Flame sensors
    • F23N2229/16—Flame sensors using two or more of the same types of flame sensor

Definitions

  • the invention relates to a device for detecting the presence of a flame and a method for detecting the presence of a flame according to the preamble of claim 1 or 13.
  • Devices for detecting the presence of a flame are used as a flame detector in the monitoring of incinerators and as a flame detector in the field of fire protection.
  • the goal of any incineration plant operator is to increase overall efficiency in terms of safety advances and optimal availability improve its combustion, reduce pollutant emissions and safely monitor the combustion process.
  • radiation detectors are provided which convert radiations into a measurable electrical quantity according to a fixed law. If a detectable threshold for the measured variable is undershot, a "flame-off" signal can be generated, whereupon the fuel supply can be switched off for safety reasons.
  • the photoelectric detectors respond to the energy quanta of a radiation and are dependent on the wavelength in their spectral sensitivity.
  • UV tubes are still used for flame monitoring as a flame sensor or flame detector, but there is basically the problem that in these components so-called "percussion” may occur. It can take place without external UV radiation, a glow discharge, which can not distinguish the electronics connected to the UV tube electronics from a normal flame signal.
  • the incident radiation is periodically interrupted by a diaphragm mechanism. If further discharges occur in the tube in this dark phase, this is detected by the electronics connected to the UV tube, that is, a flame relay is switched off.
  • a mechanically designed aperture mechanism which periodically interrupts the incoming radiation, has a limited lifetime due to wear. If the times between two successive closures of the mechanical diaphragm are lengthened, the switching complexity becomes less, to determine flashes between the two shutters of the diaphragm; the detector element should be redesigned and secure.
  • Reducing the time between two consecutive shutters of the shutter mechanism increases safety with respect to the detection of a bleeder, but also increases the mechanical wear with respect to the shutter mechanism.
  • deviations from the adjustment of the diaphragm and, for example, soiling due to abrasion can lead to failure of the flame monitoring.
  • Out DE 1 293 837 A is a device for monitoring a UV tube having a pulse generator for errors of the UV tube is known in which a threshold value at the output of the pulse generator is such that it responds only to those pulses that occur when working properly UV tube. In this case, certain signal shapes and values can be assumed, which lead to a faulty detection of fürzündern or extraneous radiation.
  • the DE 1 955 338 B which discloses the preamble of claims 1 and 13, it is known to use two UV photovoltaic cells monitoring the same flame, which are followed by relay circuits consisting of at least two relays.
  • the relay circuits only have a switching state which allows a fuel supply when the sum of the signals - a voltage drop occurring at a series resistor - of the UV photocells exceeds a certain value, and the difference between the two voltage drops falls below a certain value. It is described that a detection of fürzündens is of no importance, as long as the second UV photocell is working properly. This is disadvantageous for burners that are in operation for half a year or more, so that it can not be ruled out that both UV photocells will also ignite during this time.
  • the DE 1 955 338 B Therefore, the path is taken to design a UV flame detector with a single UV photocell and a downstream channel without the use of mechanical elements.
  • the ignition of a UV photocell can be recognized by the fact that a constant gas discharge at the series resistor generates a DC voltage, which is utilized as a signal for the faulty state of the UV photocell. This requires a (foreign) radiation.
  • the object of the invention is therefore to provide a device for detecting the presence of a flame or a method for detecting the presence of a flame, with the or the presence of a flame with little effort and a long service life is provided with constant reliability and availability.
  • a device for detecting the presence of a flame or a method for detecting the presence of a flame wherein at least two UV tubes arranged in this way are provided which have the substantially same field of vision. That is, with the UV tubes, the substantially same flame area of the flame can be monitored.
  • the UV tubes can be supplied with DC voltage via an operating resistor. Via a controller, the two UV tubes are switched on and off in succession within a predetermined time interval. That is, one of the two UV tubes is supplied in each case via the operating resistance with the DC voltage, that is turned on, while the other is turned off. After switching off the previously supplied with the DC voltage UV tube, the other of the two UV tubes is turned on.
  • the operating voltage returns to its original value, which is above the ignition voltage, with a re-ignition starts when UV radiation occurs.
  • This process is repeated rapidly in succession, so that pulses per period, in which the UV tube is turned on, arise, the number of which is dependent on the intensity of the UV radiation.
  • These pulses are recorded for each of the two UV tubes and compared with each other.
  • the anode of the respective UV tube is grounded to extract an ionization in the discharge area.
  • the anode of the switched-off UV tube is set to ground potential. If differences of the signals contained by each UV tube are detected, they can be used for any necessary alarm messages or shutdowns of the burner.
  • the controller is designed for the programmable definition of turn-on and turn-off, so that even strong influences due to the aging of the tubes are detected due to Glühzünditch. Sudden ionization clouds, which lead to pulse ignition, can initiate the recordable ignitions. Again, this would be recognized within a short time.
  • the self-test according to the invention even if there is no flame, leads, for example, to better availability in the case of stand-by gas blocks in power plants. Even if the gas blocks are not fired, the self-test takes place. Even before the gas block is to be fired, it can be seen that the device is defective or occur in the UV tubes. The device can then be replaced immediately. In previously known methods and devices takes place only shortly before firing a (Vorbelichtungs-) control, which can lead to the fact that the burner or the gas block can not be put into operation, since previously the device must be replaced. Since the exchange is made on request for firing the gas block, the availability has been reduced so far.
  • the device and the method are used as a flame detector.
  • the required high voltage generation for the UV tubes via a Villard cascade circuit is generated with a charge pump for the frequency, wherein a control voltage in the low voltage range is present at one to five volts DC.
  • the Villard cascade circuit can be operated with a supply voltage of 24 V DC as in the usual and common switchgear.
  • the amount of DC voltage can be preselected by the controller to operate the UV tube with a predetermined sensitivity setting and to undergo a self or self-test.
  • a pre-selectable time applicable to the respective UV tube DC voltage for operation of the UV tube can be automatically changed to a predetermined value, for example, an increase of about 15% according to EN 298 or TÜV regulation of for example, be provided 236 volts to 271 volts.
  • the overall sensitivity and number of pulses in UV irradiation is strongly dependent on the DC voltage. The number of pulses increases sharply with the increase of the DC voltage. An increase of about 10% of the DC voltage will increase the relative sensitivity by about 50%.
  • the sensitivities change with an increase the DC voltage from about -10% to about + 10% by about 100%. If the expected or pre-calculable number of pulses is not determined as part of the increase in the operating voltage, the UV tube is defective. With the operating voltage change of the UV tube thus takes place a self-examination by the controller. The greater the increase in the operating voltage is selected, the more sensitive is the setting with regard to a self-test of the UV tube.
  • the increase of the DC voltage for each UV tube is periodically, wherein in particular with a successive switching on of the two UV tubes does not take place at the same time in both an increase in the DC voltage during operation of the UV tube.
  • the UV tubes are rotatable about a rotatable latchable unit to the flame.
  • the alignment of the tubes can be made very precisely rotatable and lockable on a housing. It is possible that the UV radiation radiates axially or radially to the unit with the UV tubes. With a radial irradiation on the unit, a small longitudinal extent in the direction perpendicular to the monitoring flame or a sudden flame is possible.
  • the UV tubes in the housing or the unit via plug connections with secured locking in the unit can be fastened, so that in case of service, the tubes are easily interchangeable in the block.
  • the replacement can be done by replacing a complete unit or a unit separable section, which simplifies maintenance and / or repair.
  • the control is preferably in the form of an SMD, that is to say a surface-mounted component or flat component.
  • the permissible ambient temperature can be increased to a maximum of 120 ° C depending on the data of the selected UV tubes.
  • the time interval is in the range of one second and the time that the UV tubes are on, in the range of a few hundred milliseconds.
  • the time that the UV tubes are each set to ground potential is in the range of a few milliseconds, so that an error in the range of within one second is recognized immediately. Safe monitoring is guaranteed. A timely shutdown or error message, especially during continuous operation and long unattended operation of the burner over 72 hours, is thus guaranteed as well as the readiness at standstill.
  • Fig. 1 shows UV tubes 1, 2 of a device according to the invention.
  • the device has at least the two UV tubes 1, 2, which can be supplied via an operating resistor with a DC voltage.
  • the two UV tubes 1, 2 have substantially the same field of view, so that they capture the same flame area of a flame.
  • the two UV tubes 1, 2 are arranged close to one another and can be exposed in the direction of a flame to be monitored or possibly occurring.
  • a unit 4 is provided, on which the two UV tubes 1, 2 are arranged or attached.
  • the two UV tubes 1, 2 are releasably secured by means of plug connections with secured locking in a cylindrical portion 20 of the unit 4.
  • the cylindrical portion 20 of the unit 4 has a radially aligned window 21, which exposes the UV tubes 1, 2 with its front region relative to the flame, so that the two UV tubes 1, 2 in particular to the flame root to be monitored or . are aligned with a possibly occurring flame.
  • the unit 4 is securely held in a mounting bracket 3.
  • the cylindrical portion 20 of the unit 4 has an external toothing 22.
  • the mounting bracket 3 has a recess into which the cylindrical portion 20 can be inserted and which in turn has one of the external teeth 22 corresponding or complementary teeth 23.
  • Fig. 1 is the mounting bracket 3 as from two mounting bracket sections 3a, 3b configured receptacle for the unit 4 shown.
  • the two mounting bracket sections 3a, 3b receive the cylindrical unit 20 with its external teeth 22 in the recess with the toothing 23.
  • the mounting bracket 3 is pivotally mounted so that the arranged in the cylindrical portion 20 of the unit 4 UV tubes 1, 2 can be aligned with the flame to be monitored or a possibly occurring flame.
  • the unit 4 is locked in the mounting bracket 3 with a balance.
  • the two UV tubes 1, 2 are aligned with the flame root, since there the UV content is highest.
  • the UV tubes 1, 2 each capture half the flame root, that is, one of the two UV tubes 1, 2 detects the "right” and the other of the two UV tubes 1, 2 the "left” area of the flame root.
  • optimal alignment and at identical behavior of the two UV tubes 1, 2 is measured at an existing flame an identical number of pulses at the same time unit.
  • By a possibly set different DC voltage for the operation of the UV tubes 1, 2 different detected pulse counts of the two UV tubes 1, 2 can be compensated for a balance.
  • Fig. 2 is the device according to the invention according to Fig. 1 shown in front of a combustion chamber of a burner arranged as a flame detector.
  • Two flame guards are provided, which are aligned with the flame root (the area of the flame designated w).
  • the units 4 are locked in the mounting brackets 3.
  • the area of the flame designated m is the combustion zone.
  • Below the flame the pressure is indicated relative to the burner center axis, which represents the x-axis.
  • the frequency, the amplitude and the wavelength can be evaluated.
  • a sensor 24 see. Fig. 1
  • a sensor 24 be provided as he, for example, in EP 2105669 A1 is disclosed.
  • a control is provided which may be present as an SMD.
  • the controller for operating the UV tubes 1, 2 can also control the sensor 24 and evaluate the detected signals.
  • Fig. 3 schematically shows the control with other elements.
  • the controller has a microcontroller or microprocessor 5 which is connected to the UV tubes 1, 2 via a high voltage switching and tube discharge unit 6. With the microprocessor 5, the controller also controls a cascade circuit 7, which is designed as a Villard cascade circuit.
  • the cascade circuit 7 and the high voltage switching and tube discharge unit 6 may be implemented as part of the controller.
  • the cascade circuit 7 can the Hochstructsumscens- and tube discharge unit 6 with Supply voltage.
  • the microprocessor 5 and the cascade circuit 7 are connected bidirectionally. As a result, a regulation of the high voltage is possible.
  • the cascade circuit 7 shown schematically as a Villard cascade circuit has a charge pump, which adjusts the high voltage via a frequency, wherein the control voltage is in the low voltage range.
  • the cascade voltage can be operated with a DC voltage, in particular 24 V DC.
  • the DC voltage generated by the cascade circuit 7 can be fed to the UV tubes 1, 2 for the operation of the UV tubes 1, 2 via the high voltage switching and tube discharge unit 6.
  • the DC voltage used for the operation of the UV tubes 1, 2 can be preselected.
  • the operating voltage of the UV tubes 1, 2 can be selected via the control.
  • Exemplary DC voltages for the operation of the UV tubes 1, 2 are 325 volts, 345 volts, 365 volts and 385 volts.
  • the signal to the UV tubes 1, 2 in the form of pulses due to a detected existing flame is supplied to both the microprocessor 5 of the controller and a safety-related monitor channel 8.
  • the output of the monitor channel 8 is connected to an input of a safety-related relay drive 9, the is also bidirectionally coupled to the microprocessor 5 of the controller. This also allows monitoring of the relay stage or relay control 9.
  • the monitor channel 8 checks for the presence of a gap in the pulsating UV tube signal.
  • the periodically occurring gap arises when switching the UV tube voltage between the UV tubes 1, 2 and is checked for compliance with their characteristic values.
  • the characteristic values are the minimum and maximum width of the gap as well as their minimum and maximum distance.
  • Fig. 4 is a block diagram of the monitor channel 8 with the two UV tubes 1, 2 shown.
  • the first flip-flop 14 detects the actual signal gap in the flame signal, which is assumed to be at least 50 ms.
  • the second flip-flop 15 detects the minimum period of occurrence of the signal gap in the signal, which is assumed to be about 800 ms.
  • a downstream high-pass filter 16 filters fewer and more frequent gaps, such as a flame that is too weak or a defective tube if there is no flame.
  • a high pass 16 downstream rectifier 17 finally generates a sawtooth-shaped analog signal, which is checked by the subsequent safety-related relay stage 9 for compliance with a voltage window.
  • the monitor channel 8 operates only with dynamic signals of a specific timing, so that an occurrence of a static signal inevitably leads to a (safety-related) shutdown.
  • the timing of the monitor channel 8 can be designed so that here a flame break leads within a second to shutdown.
  • the microprocessor 5 of the controller carries out a signal evaluation of the signals detected by the UV tubes 1, 2 for flame monitoring, which allows a test of the UV tubes 1, 2 with reliable detection of a non-existing flame. If, as described below, a weak flame or a flame break is detected, the fuel supply is interrupted via the safety-related relay control 9. It is also possible, in addition to the safety-related channel to control a evaluation relay 10 by the microprocessor 5 of the controller.
  • a current driver 12 is provided for small currents in the range of 4 to 20 milli-ampere, which can be controlled by the microprocessor 5; the current driver 12 may provide a signal representative of the qualitative flame evaluation in the form of a current.
  • the circuit according to Fig. 2 is operated with the voltage or the current of the power supply 13.
  • Fig. 5 is the inventive process of switching on and off of the two UV tubes 1, 2 with the detection of pulses to the UV tubes 1, 2 with existing flame and correctly operating UV tubes 1, 2 shown.
  • the time t is plotted on the x-axis.
  • the topmost curve in Fig. 5 indicates the voltage applied to the UV tube 1 voltage.
  • the middle curve indicates the voltage applied to the UV tube 2.
  • the voltage applied to the UV tubes 1, 2 varies between the voltage levels 0 volts, 325 volts and 380 volts.
  • the controller switches the two UV tubes 1, 2 on and off in succession at a distance of a predetermined time.
  • the switching on and off of the two UV tubes 1, 2 takes place successively within a predetermined time interval, wherein the two UV tubes 1, 2 are turned on for a predeterminable period of time.
  • the values of the predetermined time interval and the predetermined time interval as well as the distance are stored in the variable memory of the microprocessor 5.
  • the time period for each UV tube 1, 2 stored in the memory of the microprocessor 5 is the same as the distance between the direct succession switching one and the same UV tube 1, 2.
  • the following comparison and the self-examination of the UV tubes 1, 2 and the consistency check against each other is simplified when the time of operation for both UV tubes 1, 2 is identical. Furthermore, the distance between the adjacent switching one and the same UV tube 1, 2 for both UV tubes also be the same.
  • Fig. 5 results in the predetermined time interval between the indicated times t 1 and t. 5
  • the distance between turning off the UV tube 1 and turning on the UV tube 2 is determined by the in Fig. 4 defined times t 2 and t 3 defined.
  • the period of time, the two UV tubes 1, 2 are turned on, resulting from the in Fig. 4 indicated times t 2 and t 1 for UV tube 1 and t 4 and t 3 for UV tube 2.
  • the anode of the respective UV tube 1, 2 on Ground potential placed for the extraction of ionization in the discharge area, ie the UV tube 1 is placed between t 2 and t 5 and the UV tube 2 between t 4 and t 7 to ground potential.
  • a periodic switching on and off of the two UV tubes 1, 2 is ensured, in which the two UV tubes 1, 2 are driven with the same periodicity, which is the control and comparison of the number of pulses obtained, as subsequently is described simplified.
  • the lower curve represents the number of pulses detected by each of the two UV tubes 1, 2 during their operation by the microprocessor 5.
  • the two UV tubes 1, 2 have the same field of view on the flame, the number of pulses counted relative to a unit of time and at the same operating voltage is equal or within a tolerance range of approximately 5% -10%. Therefore results in correctly functioning flame detector and existing flame that each of the quotient of number of pulses and pre-definable period of time, the UV tubes 1, 2 are turned on, ie here t 6 -t 5 or t 4 -t 3 , is equal to or within the tolerance is equal for the same operating voltage. If this is not the case, it is possible to draw conclusions about an error or a defective or aged UV tube 1, 2. This will be with reference to Fig. 6 explained.
  • the number of pulses detectable on the UV tube 1, 2 also varies.
  • the two UV tubes 1, 2 at two different operating voltages, namely 325 volts and 380 volts, operated. At higher operating voltage more pulses from the microprocessor to the UV tubes 1, 2 are counted. If this is not the case or if the expected number of pulses does not result, it is possible to draw conclusions about an error or a defective or aged UV tube 1, 2. This is in relation to Fig. 6 explained.
  • the increase of the operating voltage for the two UV tubes 1, 2 from 325 volts to 380 volts to an increase in the number of pulses from 1000 to 2000, in the considered embodiment, the difference between t 5 and t 1 , ie the predetermined Time interval is one second.
  • a self-consistency test is performed for each of the UV tubes 1, 2.
  • the detected number of pulses must be higher at elevated operating voltage than at the lower operating voltage at incident UV radiation or existing flame.
  • the detected number of pulses must be in a predictable range.
  • the detected pulses of a UV tube 1, 2 are compared against each other.
  • the detected pulse counts for the two UV tubes 1, 2 are compared with each other. Identical UV tubes 1, 2 must provide the same or within a tolerance range equal pulse counts at the same operating voltage.
  • threshold values can be stored in the memory of the microprocessor 5, which form a lower limit and an upper limit for the value of the number of pulses at the respective operating voltage of the UV tube 1, 2. These thresholds may also be used for testing the UV tube 1, 2.
  • Fig. 6 shows the in Fig. 5 According to the invention, the process of switching on and off the two UV tubes 1, 2 with the detection of pulses to the UV tubes 1, 2 in the explanation of assumed defective UV tube 2. There are two different cases in the period a and Period b in Fig. 6 shown.
  • a flame exists in the period a and there is no flame in the period b.
  • the time t is plotted on the x-axis.
  • the uppermost curve indicates the voltage applied to the UV tube 1.
  • the middle curve indicates the voltage applied to the UV tube 2.
  • the voltage applied to the UV tubes 1, 2 varies between the voltage levels 0 volts, 325 volts and 380 volts.
  • the defect of the UV tube 2 in the time interval a is recognized by the fact that the number of pulses detected for the UV tube 2 is compared with the number of pulses detected for the UV tube 1.
  • the number of pulses determined by the UV tube 2 is increased with respect to the number of pulses detected by UV tube 1 at the same operating voltage.
  • the UV tube 2 is identified as defective.
  • a self-examination of the flame guard also takes place when there is no flame, ie in the idle mode of the burner, as are detected even in the absence of flame igniter, since the presence of two UV tubes 1, 2 allows each of the two UV tubes. 1 To compare 2 determined pulse numbers. If only one of the two UV tubes 1, 2 shows pulses, then it is possible to conclude that there is a defect or a puncture in the UV tube 1, 2 detecting the pulses. As described also due to Deviations in the number of pulses in the presence of a flame, that is detected in the operating mode of the burner, the fuse.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Control Of Combustion (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Claims (15)

  1. Dispositif de reconnaissance de présence de flamme par tube UV, alimentable avec une tension continue au travers d'une résistance opérationnelle, dans lequel sont prévus, au moins deux dits tubes UV (1 ; 2) agencés de façon à couvrir sensiblement le même champ visuel, et une régulation, caractérisé en ce que ladite régulation est configurée de façon à pouvoir allumer et éteindre lesdits tubes UV (1 ; 2) l'un après l'autre avec un intervalle de durée prédéterminée à l'intérieur d'un intervalle de temps pré-alloué, de façon à ce que lesdits tubes UV (1 ; 2) soient enclenchés pour un laps de temps pré-réglable, et où le nombre des impulsions reçues de chaque dit tube UV (1 ; 2) est mesurable et comparable de l'un à l'autre, et où, entre l'extinction et l'allumage desdits tubes UV (1 ; 2), l'anode desdits tubes UV (1 ; 2) respectifs peut être mise à la masse, pour le pompage d'une ionisation dans le domaine de décharge.
  2. Dispositif selon la revendication 1, caractérisé en ce que ledit laps de temps pré-réglable est le même pour chacun desdits deux tubes UV (1 ; 2).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que ledit intervalle de temps pré-alloué est de 1 seconde.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que ladite tension continue est une haute tension, qui peut être obtenue par un circuit en cascade (7), en particulier par un circuit multiplicateur en cascade de Villard, avec une pompe de suralimentation.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la valeur de ladite tension continue pour le fonctionnement desdits tubes UV (1 ; 2) est pré-programmable par ladite régulation pour une auto-vérification desdits tubes UV (1 ; 2) correspondants.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que ladite tension continue pour le fonctionnement desdits tubes UV (1 ; 2) pour desdits laps de temps pré-réglables est augmentée pour obtenir une augmentation de la sensibilité d'une auto-vérification dudit tube UV (1 ; 2) concerné.
  7. Dispositif selon la revendication 6, caractérisé en ce que un intervalle de temps avec tension continue augmentée pour le fonctionnement d'un dit tube UV (1 ; 2) est suivi d'un laps de temps avec une tension continue non augmentée pour le fonctionnement de l'autre dit tube UV (2 ; 1).
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que lesdits laps de temps à tension continue augmentée sont périodiques pour un dit tube UV (1 ; 2).
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que lesdits tubes UV (1 ; 2) sont montés orientables sur une unité clipable (4) pivotante vers la naissance de flamme de ladite flamme à surveiller.
  10. Dispositif selon la revendication 9, caractérisé en ce que lesdits tubes UV (1 ; 2) sont fixables dans ladite unité (4) par des prises embrochables avec arrêt sécurisé.
  11. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que ladite régulation est en technologie CMS.
  12. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce que le temps où lesdits tubes UV (1 ; 2) sont respectivement allumés, est dans un domaine de quelques millisecondes, et en ce que ledit intervalle de temps est d'environ 1 seconde..
  13. Procédé de reconnaissance de présence de flamme par tube UV, alimentable avec une tension continue au travers d'une résistance opérationnelle, dans lequel on utilise, au moins deux dits tubes UV (1 ; 2) agencés de façon à couvrir sensiblement le même champ visuel, caractérisé en ce qu'on allume et éteint lesdits tubes UV (1 ; 2) l'un après l'autre avec un intervalle de durée prédéterminée à l'intérieur d'un intervalle de temps pré-alloué, de façon à ce que lesdits tubes UV (1 ; 2) soient enclenchés pour un laps de temps pré-réglable, et où on mesure le nombre des impulsions reçues de chaque dit tube UV (1 ; 2) et on les compare l'un à l'autre, et où, entre l'extinction et l'allumage desdits tubes UV (1 ; 2), on met l'anode desdits tubes UV (1 ; 2) respectifs à la masse, pour le pompage d'une ionisation dans le domaine de décharge.
  14. Procédé selon la revendication 13, caractérisé en ce qu'on effectue de façon périodique et continue ledit enclenchement desdits tubes UV (1 ; 2), ledit décompte et ladite comparaison des impulsions, tout comme ladite mise de ladite anode à la terre.
  15. Procédé selon la revendication 13 ou 14, caractérisé en ce qu'on met en oeuvre ledit procédé de façon ininterrompue.
EP10013450.1A 2010-10-08 2010-10-08 Dispositif de détection de la présence d'une flamme Active EP2439451B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10013450.1A EP2439451B1 (fr) 2010-10-08 2010-10-08 Dispositif de détection de la présence d'une flamme
PL10013450T PL2439451T3 (pl) 2010-10-08 2010-10-08 Urządzenie do wykrywania obecności płomienia
ES10013450.1T ES2446317T3 (es) 2010-10-08 2010-10-08 Dispositivo para detectar la presencia de una llama
DK10013450.1T DK2439451T3 (da) 2010-10-08 2010-10-08 Apparat til erkendelse af tilstedeværelsen af en flamme
US13/317,002 US8618493B2 (en) 2010-10-08 2011-10-06 Apparatus and method for detecting the presence of a flame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10013450.1A EP2439451B1 (fr) 2010-10-08 2010-10-08 Dispositif de détection de la présence d'une flamme

Publications (2)

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EP2439451A1 EP2439451A1 (fr) 2012-04-11
EP2439451B1 true EP2439451B1 (fr) 2013-12-11

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EP10013450.1A Active EP2439451B1 (fr) 2010-10-08 2010-10-08 Dispositif de détection de la présence d'une flamme

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US (1) US8618493B2 (fr)
EP (1) EP2439451B1 (fr)
DK (1) DK2439451T3 (fr)
ES (1) ES2446317T3 (fr)
PL (1) PL2439451T3 (fr)

Cited By (1)

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DE102021130911A1 (de) 2021-11-25 2023-05-25 Bfi Automation Mindermann Gmbh Steueranordnung zur erkennung des vorhandenseins einer flamme mit flammenwächtern für einen brenner und flammenwächtersystem

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Publication number Priority date Publication date Assignee Title
US20140287369A1 (en) * 2013-03-20 2014-09-25 Bruce George Yates Dual/Redundant Self Check Ultraviolet Flame Sensor and Combustion Safeguard Control
PL3045816T3 (pl) * 2015-01-19 2019-07-31 Siemens Aktiengesellschaft Urządzenie do regulacji instalacji palnikowej
US9417124B1 (en) * 2015-05-13 2016-08-16 Honeywell International Inc. Utilizing a quench time to deionize an ultraviolet (UV) sensor tube
US10648857B2 (en) 2018-04-10 2020-05-12 Honeywell International Inc. Ultraviolet flame sensor with programmable sensitivity offset
US11473973B2 (en) 2018-11-30 2022-10-18 Carrier Corporation Ultraviolet flame detector
US10739192B1 (en) 2019-04-02 2020-08-11 Honeywell International Inc. Ultraviolet flame sensor with dynamic excitation voltage generation
EP4397907A1 (fr) 2023-01-04 2024-07-10 Siemens Aktiengesellschaft Commande de capteur de combustion

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FR1211844A (fr) * 1958-10-17 1960-03-18 Dispositif de sécurité pour l'alimentation d'un brûleur à combustible liquide ou gazeux
DE1256828B (de) 1964-07-17 1967-12-21 Philips Patentverwaltung Betriebsueberwachungsschaltung fuer Gas- oder OElfeuerungsanlagen
DE1293837B (de) 1966-07-23 1969-04-30 Sylvania Vakuumtechnik Gmbh Einrichtung zur UEberwachung eines eine UV-Roehre aufweisenden Impulsgebers auf Fehler der UV-Roehre
DE1955338C2 (de) 1969-11-04 1971-09-30 Durag Appbau Gmbh Uv flammenwaechter
CH587449A5 (fr) 1975-07-08 1977-04-29 Brupel Ag
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CH672949A5 (fr) * 1987-06-22 1990-01-15 Landis & Gyr Ag
WO2000065281A1 (fr) * 1999-04-26 2000-11-02 Satronic Ag Dispositif de surveillance de flammes
DE10055831C2 (de) * 2000-11-11 2002-11-21 Bfi Automation Gmbh Flammenwächter für einen mit Öl oder Gas betriebenen Brenner
JP4521153B2 (ja) * 2002-05-07 2010-08-11 株式会社山武 紫外線検出装置
DK2105669T3 (da) 2008-03-26 2016-04-11 Bfi Automation Mindermann Gmbh Flammeovervågnings- og vurderingsindretning

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021130911A1 (de) 2021-11-25 2023-05-25 Bfi Automation Mindermann Gmbh Steueranordnung zur erkennung des vorhandenseins einer flamme mit flammenwächtern für einen brenner und flammenwächtersystem
DE102021130911B4 (de) 2021-11-25 2024-08-29 Bfi Automation Mindermann Gmbh Steueranordnung zur Erkennung des Vorhandenseins einer Flamme mit Flammenwächtern für einen Brenner und Flammenwächtersystem

Also Published As

Publication number Publication date
EP2439451A1 (fr) 2012-04-11
US20120138809A1 (en) 2012-06-07
US8618493B2 (en) 2013-12-31
ES2446317T3 (es) 2014-03-07
DK2439451T3 (da) 2014-03-10
PL2439451T3 (pl) 2014-06-30

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