EP0405014B1 - Sicherheitseinrichtung für Kessel - Google Patents

Sicherheitseinrichtung für Kessel Download PDF

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Publication number
EP0405014B1
EP0405014B1 EP89201691A EP89201691A EP0405014B1 EP 0405014 B1 EP0405014 B1 EP 0405014B1 EP 89201691 A EP89201691 A EP 89201691A EP 89201691 A EP89201691 A EP 89201691A EP 0405014 B1 EP0405014 B1 EP 0405014B1
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EP
European Patent Office
Prior art keywords
network
burner
sensing devices
combustion chamber
temperature
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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EP89201691A
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English (en)
French (fr)
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EP0405014A1 (de
Inventor
Luigi Cerati
Pietro Arveda
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Individual
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Individual
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Publication date
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Priority to AT89201691T priority Critical patent/ATE99042T1/de
Priority to DE89201691T priority patent/DE68911677D1/de
Priority to EP89201691A priority patent/EP0405014B1/de
Publication of EP0405014A1 publication Critical patent/EP0405014A1/de
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Publication of EP0405014B1 publication Critical patent/EP0405014B1/de
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F24H9/2042—Preventing or detecting the return of combustion gases
    • F24H9/205—Closing the energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/112—Preventing or detecting blocked flues
    • F24H15/116—Disabling the heating means in response thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/254—Room temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms

Definitions

  • the present invention refers to a safety device for boilers, in particular for domestic heating equipments, sectional boilers or the like.
  • the present invention refers to a safety device which stops the feeding of a burner in order to stop the products of the combustion expelled from the burner from invading the room housing the boiler, istead of being expelled outwards by the chimney.
  • a boiler of the above kind comprises a burner, a combustion chamber, a heat exchanger fitted with a pilot flame nozzle and located above the combustion chamber and in which, as known, part of the heat of the gases coming from said combustion chamber is transmitted to an intermediate heating fluid (water, oil and the like); a hood for a chimney, located above said heat exchanger, via which the gases having passed through the exchanger are sent to the chimney.
  • an intermediate heating fluid water, oil and the like
  • Detecting instruments which are able to detect the quality and the quantity of the usual pollutants coming from combustion such as carbon monoxide or carbon dioxide, methane and other gaseous hydrocarbons. These instruments can be portable and are not adapted to intervene directly on the feeding of the boiler. They also have the following disadvantages:
  • U.S. A - 3,537,803 refers to a safety device for a gas fired furnace, which comprises: an enclosure, a combustion chamber within said enclosure, a flue connected to said combustion chamber for conducting the exhaust gases from said combustion chamber, a first opening in said enclosure admitting air into said combustion chamber and a second opening in said enclosure serving as a draft diverter for said flue.
  • the improvement comprises: a plurality of temperature sensing devices mounted externally on said combustion chamber, one of said temperature sensing devices being mounted on said enclosure immediately above said opening serving as draft diverter; and means responsive to each of said temperature sensing devices for interrupting the fuel supply of said furnace when the temperature at any one of said sensing devices rises above a predetermined level.
  • GB - A - 2 020 794 refers to a control means for gas fired heat generators of the type comprising a heater body provided with a heat-exchanger, wherein the supply of the gas to the burner is interrupted as a result of an increase in the quantity of carbon monoxide in the products of combustion due to contamination of the heat-exchanger or an overload at the burner, said means comprising a tube adapted to open at one end into the heater body and at the other end outside the body to remove products of combustion, and a heat sensitive device mounted on said tube to react to a rise in temperature so as to interrupt the supply of gas to the burner or to actuate a warning system.
  • the device described in G.B. - A- 2 020.794 has the following disadvantages: in particular it has an irreversible effect on the supply of the burner as described in item 4 above. Furthermore the supply may be obtained by connecting the electrical conductors which control the solenoid supply valve directly; in the device described in G.B. - A- 2 020.794 these conductors form an electrical network which also comprises a thermostat constituting said heat sensitive device mounted on said tube. It is quite easy to close the electrical circuit by a by-pass conductor which cuts out the thermostat.
  • DE - A - 30 20 220 shows a safety device for a heat source which presents an inlet, a first outlet in a chimney and a second outlet in a room housing the heat source and a control transducer device which cuts out the heat source when the exhaust gases tend to invade the room housing the heat source or when the chimney is clogged.
  • Two temperature sensors are provided in said device; one of these sensors is mounted on the outlet of the chimney and the other on the outlets in the room housing the heat source; the control transducer device is responsive to the difference of the values of the temperature measured by the sensors and cuts out the heat source when the difference is less than a nominal value defined by a potentiometer.
  • the present invention is intended to remedy these drawbacks.
  • the invention solves the problem of how to create a safety device for boilers.
  • a device according to the present invention the following result is achieved: the feeding of the burner is stopped if the products of the combustion tend to invade the room housing the boiler and it is reset if the tendency is momentary.
  • the advantages offered by the device according to the present invention consist essentially of the fact that it is very simple to assembly it near the boiler, even if already installed, the assembly being also very reliable.
  • a boiler having: an enclosure, a combustion chamber within the enclosure, a chimney connected to the combustion chamber for conducting the exhaust gases from the combustion chamber, a first opening in the enclosure admitting air into the combustion chamber and a second opening in the enclosure serving as a draft diverter for the chimney; the bolier further having: a plurality of temperature sensing devices mounted externally on the combustion chamber, one of the temperature sensing devices being mounted on the enclosure immediately above the opening serving as draft diverter for the chimney; safety devices responsive to each of the temperature sensing devices, the safety devices being electrically connected to a solenoid valve to interrupt the fuel supply of a burner housed in the combustion chamber when the temperature at any one of the sensing devices rises above a predetermined level and to maintain the fuel supply when the same temperature is lower than said level; a pilot flame nozzle to reset the combustion of the burner, wherein the safety devices comprise a defining element for defining two temperature thresholds, the first threshold being higher than the second threshold and coinciding with said level; at the second threshold, measured
  • the boiler shown schematically in Fig.1 comprises a burner 1, connected to a feeding piping 2 for a gaseous fuel, fitted with a solenoid valve 3 able to permit or to stop the gas flow toward the burner 1; a combustion chamber 4 being located between the burner 1 and a heat exchanger 5.
  • a hood 6 having a cavity for a chimney 7 is located above the exchanger 5; the hood 6 has a cavity 8 open toward the room.
  • the burner is fitted with a pilot flame nozzle 9 which ensures the lighting and the stability of the combustion of burner 1 under any condition.
  • a first temperature sensor 10 is located below the burner 1 where a temperature value close to the room temperature is established when the boiler is on.
  • a second temperature sensor 11 is located near the cavity 8 in a zone which divides the inner space of said cavity 8 from the room; a temperature value close to the room temperature established in said zone when the boiler is on.
  • the first and second sensors 10 and 11 are electrically connected to a safety device 12 for boilers via a first conductor 13 and a second conductor 14, respectively.
  • the device 12 is connected to a generator 15 and to the solenoid 3 via a third conductor 16 and a fourth conductor 17, respectively.
  • the sensors 10 and 11 are connected to a first and a second safety device for boilers 12a and 12b, respectively, identical to said device 12 of Fig.1, via the conductor 13 and 14; the devices 12a and 12b are connected to a generator 15 via the conductors 15a and 15b and to the solenoid valve 3 via the conductors 16a and 16b.
  • the sensors 9 and 10 are connected to a first and a second safety device for boilers 12a and 12b, respectively, identical to said device 12 of Fig.1, via the conductors 13 and 14; the devices 12a and 12b are connected to a generator 15 via the conductors 16a and 16b and to the solenoid valve 3 via the conductors 17a and 17b. Furthermore, the devices 12a and 12b are connected to a first and to a second audio or visible signaller 18a and 18b, respectively, via conductors 19a and 19b. In this manner it is possible to identify immediately which of the two sensors 10 or 11 has emitted the signal indicating the flow of the burnt gases toward the room housing the boiler and to eliminate the obstacle which has caused this flow.
  • the signaller 18a begins working, it means that the signal comes from sensor 10 and therefore the exchanger 5 must be cleaned; if the signaller 18b begins working, it means that the signal comes from sensor 11 and that the chimney must be cleaned.
  • the sensors 10 and 11 may be both thermocouples and thermistors; the latter may be both P.T.C. and N.T.C.
  • a safety device fitted with temperature sensor made of thermocouples is shown in Fig.5.
  • a sensor 10 or 11 is connected to a proportional amplifier 20 having an electric parameters gain which is very high and which has no distorsions in output signal.
  • the amplifier 20 sends electrical pulses, proportional to the pulses received from the sensor 10 or 11, to an hysteresis network 21, which defines two intervention thresholds T1 and T2 of the device on the solenoid valve 3, T1 being greater than T2.
  • the hysteresis network 21 sends output signals to an extinguishing network 22 connected to a power stage 23, fed by a rectifier transformer group 24.
  • a diode 25 is opportunely located.
  • the stage 23 is connected to a solenoid 26 of the solenoid valve 3 which is earthed via a resistence 27.
  • a diode 28 earths a first node 29 to void overcurrents linked to solenoid 26.
  • a second node 30 is connected to stage 23 via solenoid 26 and to a delay network 31, whose output signal is sent to a chopper network 32, which contains a reference signal of the current intensity I ref and whose output signal is sent to the stage 23.
  • a lamp 33 connected to node 30 and earthed, lights up when the solenoid is energized.
  • the hysteresis network 21 When the temperature detected by one of the sensors 10 or 11 is above a value T1, the hysteresis network 21 sends a signal to the stage 23 to act on the solenoid 26 so that the solenoid valve 3 stops the fuel feeding the burner 1; at the same time lamp 33 lights up. When, vice- versa, the temperature detected by one of the sensors 10 or 11 is below a value T2, the hysteresis network 21 sends a signal to the stage 23 to act on the solenoid 26 so that the solenoid valve 3 opens the fuel feeding the burner 1 and at the same time lamp 33 goes off.
  • Fig.6 shows an electric network which controls a safety device according to the present invention in which the sensors 10 and 11 consist of thermistors both P.C.T. or N.T.C.
  • the network consists of a mesh having four resistence sides R1, R2, R3, R4; between nodes A and B the rectifier transformer group 24, shown in Fig.5, is inserted to generate a low tension e.m.f. Between nodes C and D a safety device 12 is inserted which is fed by the group 24 and which is connected to solenoid 3.
  • Sensors 10 or 11 are represented by the variable resistence R4, which is arranged in series with a rheostat R5.
  • A1 R4+R5 R3x(R1/R2)
  • the rheostat R5 serves to determine the value of the temperature T2, for which nodes C and D are at the same potential.
  • the conductor 35 located between nodes C and D, would be crossed by a current I n directed toward the direction of arrow F2 which could damage the device 12. For this reason the conductor 35 is fitted with a diode 34 which voids the passage of the current I m , directed toward the direction of the arrow F1; for a temperature value T M greater than T2, the current I m established in the conductor 35.
  • the current I m enables the device 12 to send an electrical signal to the solenoid valve 3 to stop the feeding to burner 1.
  • sensors 10 and 11 are not located near the device 12, one must take into account the problems caused by the variations of the resistence of the conductors necessary for electrical connection between the sensors and the device.
  • the structure shown in Fig.7 is used; in said figure, the electrical feeding of the solenoid valve 3 is accomplished by connecting electrically the solenoid valve 3 to the high distribution network 36, while the regulation of said feeding is carried out in low tension. This expedient allows a decrease in the fall of pressure along the feeding conductors.
  • the rectifier transformer group 24 is fitted with an inlet I R connected to the distribution network 36 and with three outlets U1, U2, U3, connected to a first operating network 37, to a second operating network 38 and to the power stage 23, respectively; said networks 37 and 38 being identical.
  • the power stage 23 is connected to the solenoid valve 3 to determine the opening and the closing states thereof.
  • the sensor 10 is connected, via a conductor 41, at one end to the terminal 39 of the first operating network 37 and at the other end to earth 40.
  • Two calibration rheostats 42 and 43 are arranged in series in the conductor 41.
  • the outlet of the network 37 is connected to the inlet of a shielding network 44, one of the functions of which is to negate the effects of the high tension which acts on a light signaller 45, connected to network 44 and to earth 40.
  • the outlet of network 44 is connected to a first inlet of the power stage 23.
  • the network 37 contains a current or tension reference signal R ref .
  • R ref a current or tension reference signal
  • the network 37 sends a first signal to network 44 enabling it to light the signaller 45 and to send a signal to the power stage 23 for which the stage 23 keeps the solenoid valve 3 open; vice-versa, when the current I a is greater than R ref , the network 37 sends to network 44 a second signal which enables it to turn off the signaller 45 and to send a signal to the power stage 23 for which the power stage 23 closes the solenoid valve 3.
  • the variation of the current or of the tension in the network 37 depends on the value of the resistence of the sensors, the value being a function of the temperature to which the sensors are subjected and on the calibration which the rheostats 40 and 41 have undergone.
  • the sensor 11 is connected via a conductor 46 at one end to the terminal of the second operating network 38 and at the other end to the earth.
  • Two calibration rheostats 48 and 49 are arranged in series in relation to the conductor 41.
  • the outlet of the network 38 is connected to the inlet of a shielding network 50 which is able, amongst other things, to negate the effects of the high tension acting on the light signaller 51 connected to network 50 and to earth 40.
  • the outlet 50 is connected to a second inlet of the power stage 23.
  • the network 38 contains a current or tension reference signal R ref .
  • R ref a current or tension reference signal
  • the network 38 sends a first signal to network 50 enabling it to light the signaller 51 and to send a signal to power stage 23, as a result of which the power stage 23 keeps the solenoid valve 3 open; vice-versa, when the current I a is greater than R ref , the network 38 sends a signal to network 50 enabling it to turn off the signaller 51 and to send a power signal to the power stage 23, as a result of which the power stage 23 closes the solenoid valve 3.
  • the current or tension variation inside the network 38 depends on the value of the resistence of the sensor 11; the value being a function of the temperature to which the sensor 11 undergoes and of the calibrations which the rheostats 48 and 49 have undergone.
  • the closure of the solenoid valve 3, upon overheating of one of the sensor 10 and 11, may be caused by the closing of the exchanger 5 or of the chimney 7.
  • the signallers 45 and 51 indicate which of the sensors is involved in the failure of the boiler so that the failure may be removed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Combustion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Claims (4)

  1. Ein Kessel weist folgende Glieder auf: einen Mantel, eine Verbrennungskammer (4), die innerhalb des Mantels gelagert ist, einen mit der Verbrennungskammer (4) angeschlossenen Kamin (7), der für den Auslaß der Abgase aus der Verbrennungskammer (4) dient; eine erste Öffnung im Mantel für den Luftzutritt in die Verbrennungskammer (4) und eine zweite Öffnung im Mantel, die zum Ableiten der Abgase in Richtung des Kamins (7) dient; außerdem umfaßt der Kessel folgende Vorrichtungen: mehrere Temperaturfühler (10,11), die sich in der Außenseite der Verbrennungskammer (4) befinden, wobei einer der Temperaturfühler (10,11) an dem Mantel unmittelbar über der Öffnung, die zum Ableiten der Abgase in Richtung des Kamins (7) dient, angeordnet ist; Sicherheitsvorrichtungen (12) mit einem Rückmeldungssystem, das auf die Temperaturfühler (10,11) reagiert, wobei die Sicherheitsvorrichtungen (12) an einem Elektroventil (3) angeschlossen sind, damit die Kraftstoffspeisung eines Brenners (1) der Verbrennungskammer (4) ausgeschaltet wird, wenn die Temperatur, die durch einen der Temperaturfühler (10,11) abgemessen wird, über einen vorbestimmten Wert steigt und die Kraftstoffspeisung ermöglicht, wenn die Temperatur niedriger als der obige Wert ist; eine Steuerflammedüse (9), die zur erneuten Anzündung des Brenners (1) dient, dadurch gekennzeichnet, daß die Sicherheitsvorrichtung (12) mit einem Regulierungsglied (21) ausgestattet ist, welches zwei Temperaturstufen (T₁,T₂) definiert, wobei die erste höher als die zweite ist, un mit dem genannten Wert übereinstimmt; auf der zweiten Stufe (T₂), die von den Temperaturfühlern (10,11) aufgezeigt wird, aktiviert das Regulierungsglied (21) das Elektroventil (3) zur erneuten Anzündung des Brenners (1); wobei elektrische Vorrichtungen zur Vermeidung solcher Probleme dienen, die mit Wiederstandsschwankungen der elektrischen Leitungen, die zur Verbindung unter den Fühler (10,11) und der Sicherheitsvorrichtung (12) dienen, zusammenhängen.
  2. Kessel nach Anspruch 1, dadurch gekennzeichnet, daß das Regulierungsglied (21) aus einem Hysteresenetz besteht, welches die Temperturstufen (T₁,T₂) definert.
  3. Kessel nach Anspruch 1, dadurch gekennzeichnet, daß das Hystersenetz (21) zu einem Kreis mit einem proportionellen Verstärker (20) gehört, der einen hohen Gewinn an elektrischen Parametern bewirkt und die Abweichungen des Ausgangssignals vermeidet; der Verstärker (20) sendet elektrische Signale zum Hysteresenetz (21), die zu den elektrischen Signalen, die aus den Fühlern (10,11) kommen, proportionell sind; das Hystersenetz (21) sendet Ausgangssignale zu einem Löschungsnetz (22), das mit einer durch eine Transformator-Gleichrichter-Einheit (24) gespeisten Leistungsstufe (23) verbunden ist, wobei eine Diode zwischen der Transformator-Gleichrichter-Einheit (24) und der Leistungsstufe (23) angeordnet ist; die Leistungsstufe (23) ist mit einem Solenoid (26) des Elektroventils (3) verbunden, das die Speisung des Brenners (1) kontrolliert; der Solenoid ist durch einen Wiederstand (27) geerdet; eine Diode (28) erdet einen ersten Knoten (29), um zu vermeiden, daß sich Exstrastrom bildet, der an den Solenoid (26) verkettet ist; ein zweiter Knoten (30), der mit der Leistungsstufe (23) durch den Solenoid (26) verbunden ist, wie auch an ein Verpätungsnetz (31), dessen Ausgangssignal an ein Chopper-Netz (32) gesendet wird, das Bezugswerte (IRef,RRef) enthält und dessen Ausgangssignal an die Leistungsstufe (23) gesendet wird.
  4. Kessel nach Anspruch 1, dadurch gekennzeichnet, daß die elektrische Vorrichtungen, die zur Vermeidung solcher Probleme dienen, die Transformator-Gleichrichter-Einheit (24) umfaßen, die einen Eingang (IRef) hat, der mit einem Ferteilungsnetz (36) verbunden ist, und hat außerdem drei Ausgänge (U₁,U₂,U₃), die jeweils mit einem ersten Operationsnetz und an die Leistungsstufe (23) Verbunden sind; die Leistungsstufe (23) is mit dem Elektroventil (3) verbunden, um das Öffnen und Schließen des Ventils (3) zu bewirken; einer der Temperaturfühler (10,11) ist durch eine Leitung (41,46) an einem Ende einer Klemmer (39,47) des Operationsnetzes (37,38) und an anderen Ende an die Erde (40) angeschloßen; zwei Eichrheostate (42,43,48,49) sind mit mit der Leitung (41,46) hintereinandergeschaltet; der Ausgang des Netzes (37,38) ist mit dem Eingang eines Schutznetzes (44,50) verbunden, das unter anderem dazu dient, die Auswirkungen der Hochspannung zu vermeiden, welche ein mit Netz (44,50) und Erde (40) verbundenes Lichtsignal (45,51) betätigt; der Ausgang des Netzes (44,50) ist mit einem ersten Eingang der Leistungsstufe (23) verbunden; zu dem Netz (37,38) gehört ein Bezugsignal (IRef) in Strom oder Spannung.
EP89201691A 1989-06-27 1989-06-27 Sicherheitseinrichtung für Kessel Expired - Lifetime EP0405014B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT89201691T ATE99042T1 (de) 1989-06-27 1989-06-27 Sicherheitseinrichtung fuer kessel.
DE89201691T DE68911677D1 (de) 1989-06-27 1989-06-27 Sicherheitseinrichtung für Kessel.
EP89201691A EP0405014B1 (de) 1989-06-27 1989-06-27 Sicherheitseinrichtung für Kessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89201691A EP0405014B1 (de) 1989-06-27 1989-06-27 Sicherheitseinrichtung für Kessel

Publications (2)

Publication Number Publication Date
EP0405014A1 EP0405014A1 (de) 1991-01-02
EP0405014B1 true EP0405014B1 (de) 1993-12-22

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ID=8202418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89201691A Expired - Lifetime EP0405014B1 (de) 1989-06-27 1989-06-27 Sicherheitseinrichtung für Kessel

Country Status (3)

Country Link
EP (1) EP0405014B1 (de)
AT (1) ATE99042T1 (de)
DE (1) DE68911677D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6880493B2 (en) * 1992-03-23 2005-04-19 Todd W. Clifford Gas water heater and method of operation
GB201011293D0 (en) * 2010-07-06 2010-08-18 Macphail Nicholas J J Means of oil supply shut off in case of leak
EP2447609B1 (de) * 2010-11-02 2013-09-25 Honeywell Technologies Sarl Verfahren zum Betreiben eines gebläseunterstützten, atmosphärischen Gasbrenners

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537803A (en) * 1969-10-29 1970-11-03 Joseph N Ignazio Safety device for gas-fired furnaces and the like
FR2425614A1 (fr) * 1978-05-12 1979-12-07 Leblanc Sa E L M Perfectionnements apportes aux generateurs de calories fonctionnant au gaz, notamment aux chauffe-eau
DE3020228C2 (de) * 1980-05-24 1984-08-09 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Sicherheitseinrichtung für brennstoffbeheizte Geräte

Also Published As

Publication number Publication date
ATE99042T1 (de) 1994-01-15
EP0405014A1 (de) 1991-01-02
DE68911677D1 (de) 1994-02-03

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