DE524853T1 - SAFETY DEVICE FOR DETECTING ANALMAL TRAIN FOR A GAS BOILER WITH A SMOKE GAS CHANNEL WITH A NATURAL TRAIN. - Google Patents

SAFETY DEVICE FOR DETECTING ANALMAL TRAIN FOR A GAS BOILER WITH A SMOKE GAS CHANNEL WITH A NATURAL TRAIN.

Info

Publication number
DE524853T1
DE524853T1 DE199292401959T DE92401959T DE524853T1 DE 524853 T1 DE524853 T1 DE 524853T1 DE 199292401959 T DE199292401959 T DE 199292401959T DE 92401959 T DE92401959 T DE 92401959T DE 524853 T1 DE524853 T1 DE 524853T1
Authority
DE
Germany
Prior art keywords
boiler
safety device
draught
temperature
sensor
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.)
Pending
Application number
DE199292401959T
Other languages
German (de)
Inventor
Gerard F-93250 Villemomble Coquillaud
Maurice F-77450 Esbly Frisquet
Original Assignee
Frisquet S.A., Meaux
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9415374&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE524853(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Frisquet S.A., Meaux filed Critical Frisquet S.A., Meaux
Publication of DE524853T1 publication Critical patent/DE524853T1/en
Pending legal-status Critical Current

Links

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
    • F23N5/247—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using mechanical means
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • 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
    • F23N5/04—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The boiler comprising a damper mounted above the heating body, so as to form an additional ambient air inlet between the heating body and the damper, via which the boiler is connected to the smoke pipe, the safety device comprises a temperature detector positioned outside the boiler and facing said additional ambient air inlet, the detector thus being swept, when the boiler operates, by the ambient air which is sucked in through the damper into the smoke pipe in order to be mixed with the discharged combustion gases, this detector being designed to cut, by any suitable means such as a deformable element connected to an electric contact, the gas supply to the burner of the boiler, when the temperature detected exceeds a predetermined limit THETA 1 corresponding to an abnormal draught and to reestablish this supply only at the end of a predetermined time t when the temperature in the environment of the detector has fallen to a value THETA 2 corresponding to normal operation of the boiler and the combustion gases which may have escaped into the ambient environment have had the time to be reabsorbed into the smoke pipe in order to be discharged.

Claims (7)

PatentansprüchePatent claims Eine Anomalie des Zugs detektierende Sicherheitseinrichtung für einen Kessel für Gasbetrieb, der mit einer Rauchgasleitung mit natürlichem Zug arbeitet, welcher Kessel einen Heizkörper, einen am Unterteil des Heizkörpers angeordneten Brenner, ein in der Gaszuführungsleitung des Brenners angeordnetes Magnetventil, einen oberhalb des Heizkörpers so angebrachten Zugbegrenzer, daß ein Einlaß für zusätzliche Umgebungsluft zwischen dem Heizkörper und dem Zugbegrenzer gebildet wird, durch den der Kessel mit das Rauchgasleitung der Räumlichkeit verbunden ist, in der er installiert ist, einen Temperaturfühler aufweist, der außerhalb des Kessels und gegenüber dem Einlaß der zusätzlichen Umgebungsluft angeordnet ist, wobei der Fühler, wenn der Kessel arbeitet, so durch die Umgebungsluft umspült wird, die durch den Zugbegrenzer in die Rauchgasleitung aufgrund des darin herrschenden Unterdrucks angesogen wird, um mit den abziehenden Verbrennungsgasen vermischt zu werden, wobei der Fühler so konstruiert ist, die Gaszufuhr des Brenners des Kessels zu unterbrechen, wenn die detektierte Temperatur einen vorgegebenen Grenzwert &THgr;.. übersteigt, der für den betreffenden Kessel einer Anomalie des Zugs entspricht und von dem ab in der Umgebung eine Abgabe von kohlendioxidhaltigern Verbrennungsgas in Höhe des Zugbegrenzers möglich ist, dadurch gekennzeichnet, daß \ der Fühler so ausgebildet ist, daß er die erneute Zufuhr von Gas erst am Ende eines vorbestimmten Zeitraums t bewirkt, wenn die Temperatur in der Umgebung des Fühlers auf einen Wert 9j gefallen ist, der einer normalenA safety device for detecting a draught anomaly in a gas-fired boiler operating with a flue gas line with natural draught, which boiler comprises a heating element, a burner arranged at the bottom of the heating element, a solenoid valve arranged in the gas supply line of the burner, a draught restrictor arranged above the heating element so as to form an inlet for additional ambient air between the heating element and the draught restrictor, by means of which the boiler is connected to the flue gas line of the room in which it is installed, a temperature sensor arranged outside the boiler and opposite the inlet for the additional ambient air, the sensor being, when the boiler is operating, washed by the ambient air which is sucked into the flue gas line by the draught restrictor due to the negative pressure prevailing therein in order to be mixed with the exhausted combustion gases, the sensor being designed to interrupt the gas supply to the burner of the boiler when the detected temperature exceeds a predetermined limit value &THgr;.. which corresponds to a draught anomaly for the boiler in question and from which onwards a discharge of combustion gas containing carbon dioxide is possible in the environment at the level of the draught limiter, characterized in that \ the sensor is designed in such a way that it causes the renewed supply of gas only at the end of a predetermined period of time t when the temperature in the environment of the sensor has fallen to a value 9j corresponding to a normal Funktionsweise des Kessels entspricht, und daß die möglicherweise in die Umgebung entwichenen Verbrennungsgase genügend Zeit gehabt haben, wieder in der Rauchgasleitung aufgenommen zu werden, um abgezogen zu werden.operation of the boiler and that any combustion gases that may have escaped into the environment have had sufficient time to be reabsorbed in the flue gas line and removed. 2. Sicherheitseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Temperaturfühler ein verformbares gekrümmtes Element vom federnden Typ, das plötzlich von einer konkaven Form in eine konvexe Form übergehen kann, und einen elektrisch mit dem Magnetventil verbundenen Kontakt aufweist, der in der Nähe des Elements angeordnet ist, und daß dieses, wenn seine Krümmung ihre Richtung unter der Wärmeeinwirkung bei einer Temperatur plötzlich ändert, die für das betreffende Element vorbestimmt und gleich der Temperatur &THgr;. ist, tätig wird, wobei der betätigte Kontakt auf das Magnetventil wirkt, um die Zufuhr von Gas zum Brenner zu unterbrechen, und wobei das verformbare Element eine solche Hysterese-Charakteristik aufweist, daß es während des ganzen genannten durch die Normen vorgegebenen Sicherheits-Zeitraums t verformt bleibt, am Ende welchen Zeitraums es wieder seine ursprüngliche Form einnimmt, wobei seine Krümmung wiederum plötzlich ihre Richtung ändert, es aufhört, den Kontakt zu betätigen und es als Ergebnis hiervon die erneute Zufuhr von Gas zum Brenner ermöglicht, wobei die detektierte Temperatur auf den Wert &thgr;2 abgesunken ist.2. Safety device according to claim 1, characterized in that the temperature sensor comprises a deformable curved element of the spring type which can suddenly change from a concave shape to a convex shape, and a contact electrically connected to the solenoid valve arranged in the vicinity of the element, and in that the latter, when its curvature suddenly changes direction under the action of heat at a temperature predetermined for the element in question and equal to the temperature &THgr;. is activated, the actuated contact acting on the solenoid valve to interrupt the supply of gas to the burner, and the deformable element having a hysteresis characteristic such that it remains deformed throughout the said safety period t specified by the standards, at the end of which period it returns to its original shape, its curvature again suddenly changing direction, it ceases to actuate the contact and, as a result, it allows the renewed supply of gas to the burner, the detected temperature having dropped to the value θ 2 . 3. Sicherheitseinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das verformbare Element die Form eines Schälchens hat.3. Safety device according to claim 2, characterized in that the deformable element has the shape of a bowl. 4. Sicherheitseinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Schälchen aus Metall ist.4. Safety device according to claim 3, characterized in that the bowl is made of metal. 5. Sicherheitseinrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das verformbare Element und5. Safety device according to one of claims 2 to 4, characterized in that the deformable element and der Kontakt in einer elektrisch und thermisch isolierenden Umhüllung angeordnet sind.the contact is arranged in an electrically and thermally insulating casing. 6. Sicherheitseinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Baueinheit des verformbaren Element und des Kontakts, die in einer Umhüllung angeordnet sind, auf dem Zugbegrenzer mit Hilfe einer Ringabstützung und eines mit dem Ring verbundenen Befestigungsteils befestigt ist.6. Safety device according to claim 5, characterized in that the assembly of the deformable element and the contact, which are arranged in a casing, is fixed to the draft limiter by means of a ring support and a fastening part connected to the ring. 7. Sicherheitseinrichtung nach einem der Ansprüche 2 bis 6,
dadurch gekennzeichnet, daß der Temperaturfühler außerdem einen Wärmeaufnehmer aufweist, der ein metallisches
Plättchen ist, das vor dem verformbaren Element angeordnet ist.7. Safety device according to one of claims 2 to 6,
characterized in that the temperature sensor also comprises a heat sensor which comprises a metallic
plate that is arranged in front of the deformable element.
DE199292401959T 1991-07-22 1992-07-08 SAFETY DEVICE FOR DETECTING ANALMAL TRAIN FOR A GAS BOILER WITH A SMOKE GAS CHANNEL WITH A NATURAL TRAIN. Pending DE524853T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9109225A FR2679627B1 (en) 1991-07-22 1991-07-22 SAFETY DEVICE DETECTING A DRAFT ABNORMALITY FOR A GAS BOILER OPERATING ON A NATURAL DRAFT SMOKE DUCT.

Publications (1)

Publication Number Publication Date
DE524853T1 true DE524853T1 (en) 1993-06-09

Family

ID=9415374

Family Applications (2)

Application Number Title Priority Date Filing Date
DE69209580T Expired - Fee Related DE69209580T2 (en) 1991-07-22 1992-07-08 Safety device for detecting abnormal draft for a gas boiler with a flue gas duct with natural draft
DE199292401959T Pending DE524853T1 (en) 1991-07-22 1992-07-08 SAFETY DEVICE FOR DETECTING ANALMAL TRAIN FOR A GAS BOILER WITH A SMOKE GAS CHANNEL WITH A NATURAL TRAIN.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE69209580T Expired - Fee Related DE69209580T2 (en) 1991-07-22 1992-07-08 Safety device for detecting abnormal draft for a gas boiler with a flue gas duct with natural draft

Country Status (5)

Country Link
EP (1) EP0524853B1 (en)
AT (1) ATE136353T1 (en)
DE (2) DE69209580T2 (en)
ES (1) ES2036994T3 (en)
FR (1) FR2679627B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1509085A (en) * 1966-10-17 1968-01-12 Saunier Duval Safety device making it possible to cut off the gas supply to the burner of a gas appliance in the event of insufficient draft from the flue to which the appliance is connected or in the event of discharge through said conduit
FR2064749A6 (en) * 1969-10-29 1971-07-23 Saunier Duval
FR2118345A5 (en) * 1970-12-18 1972-07-28 Leblanc Sa
FR2257878A1 (en) * 1974-01-10 1975-08-08 Saunier Duval Safety unit for gas flow heater - has hot gas probe connected to gas-controlling temp.-sensitive element via insulated mass
FR2425614A1 (en) * 1978-05-12 1979-12-07 Leblanc Sa E L M IMPROVEMENTS BROUGHT TO CALORIE GENERATORS USING GAS, ESPECIALLY TO WATER HEATERS
US4856982A (en) * 1987-07-13 1989-08-15 Tjernlund Products, Inc. Apparatus for exhausting combustion gases from a gas water heater

Also Published As

Publication number Publication date
EP0524853A1 (en) 1993-01-27
DE69209580T2 (en) 1996-09-19
FR2679627A1 (en) 1993-01-29
FR2679627B1 (en) 1997-06-27
ES2036994T3 (en) 1996-05-16
ES2036994T1 (en) 1993-06-16
DE69209580D1 (en) 1996-05-09
EP0524853B1 (en) 1996-04-03
ATE136353T1 (en) 1996-04-15

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