FR2476924A1 - Fuel safety cut=out appts. for gas or oil burner - has two contacts between burner control thermostat and burner to inhibit burner when flue blocked - Google Patents
Fuel safety cut=out appts. for gas or oil burner - has two contacts between burner control thermostat and burner to inhibit burner when flue blocked Download PDFInfo
- Publication number
- FR2476924A1 FR2476924A1 FR8004112A FR8004112A FR2476924A1 FR 2476924 A1 FR2476924 A1 FR 2476924A1 FR 8004112 A FR8004112 A FR 8004112A FR 8004112 A FR8004112 A FR 8004112A FR 2476924 A1 FR2476924 A1 FR 2476924A1
- Authority
- FR
- France
- Prior art keywords
- burner
- valve
- flue
- contacts
- switch
- 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.)
- Withdrawn
Links
Classifications
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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
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
- H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/10—Sequential burner running
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/16—Fail safe using melting materials or shape memory alloys
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Abstract
Description
Dans les systèmes de chauffage possèdant une chaudière à mazout ou à gaz qui travaille de fanon intermittante,il y a pendant les periodes de repos du brûleur des déperditions thermiques.Ces déperditions sont dues à l'air chaud qui passe au travers de la chaudière et s'échappe par la cheminée.On peut empocher ces déperditions par un dispositif de fermeture de l'orifice d'évacuation des produits de combustion de la chaudière.(nommé ci-dessous clapet)qui se ferme automatiquement après l'arrêt du brûleur et qui s'ouvre avant de permettre au brûleur de se remettre en marche.L'installation des systemes de chauffage dans ou proche des locaux d'habitation ou assimilés pose des exigences sévères de securité et de fiabilité pour éviter que le brûleur ne puisse fonctionner si le clapet est en position fermée.Ceci conduirait à une émanation des gaz de combustion dans les locaux. In heating systems with an oil or gas boiler that works with an intermittent dewlap, there are heat losses during the rest periods of the burner. These losses are due to the hot air which passes through the boiler and It escapes through the chimney. These losses can be prevented by a device for closing the orifice for evacuating the products of combustion from the boiler. (named below valve) which closes automatically after the burner has stopped and which opens before allowing the burner to restart. The installation of heating systems in or near residential or similar premises places severe safety and reliability requirements to prevent the burner from operating if the valve is in the closed position, which would lead to an emission of combustion gases in the premises.
Le clapet est constitue d'un tube inseré dans les tubes de raccordement entre la chaudière et la cheminee.A l'intérieur de celui-ci tourne un volet sur un axe perpendiculaire à l'axe du tube entre la position fermés et la position ouverte.A l'extérieur de celui-ci est attache un boitier de commande.Le boitier de commande contient le moteur qui tourne le olet,les interrupteurs fin de course,les relais et tous les circuits électriques nécessaires au fonctionnement du dispositif. The valve consists of a tube inserted in the connection tubes between the boiler and the chimney. Inside this one turns a flap on an axis perpendicular to the axis of the tube between the closed position and the open position .At the outside of it is attached a control box. The control box contains the motor that turns the roller, the limit switches, the relays and all the electrical circuits necessary for the operation of the device.
La commande 'electrique d'un tel clapet se fait par le signal d'un thermostat (3) qui,au lieu de mettre directement en marche le bruAleur(7) est devié pour ouvrir d'abord le clapet.Lorsque le clapet est en position ouverta ,un interrupteur fin de course(1) permet de passer du courant au brûleur(7) pour que celui-ci se mette en marcheêtc bon fonctionnement de cet interrupteur(i) est crucial du point de vue de la securité.La construction mecanique assure que la position appuyee de cet interrupteur (1) correspond avec certitude a une ouverture complèta du volet.Si l'inter- rupteur(1) est relâché mais reste electriquement ferme à cause coincement ou d'un contact soudé ferme par le courant électrique,une situation dangereuse pourrait survenir.Un second interrupteur(2) en serie ne resoud que partiellement le problème car 1 soudage d'un contact se produit à cause d'un courant excessif anormal qui risque de souder successivement les deux interrupteur en série. The electric control of such a valve is done by the signal of a thermostat (3) which, instead of directly switching on the burner (7) is deflected to first open the valve. When the valve is in open position, a limit switch (1) allows current to be passed to the burner (7) so that the latter switches on and the proper functioning of this switch (i) is crucial from the point of view of safety. mechanically ensures that the pressed position of this switch (1) corresponds with certainty to a complete opening of the shutter. If the switch (1) is released but remains electrically closed due to jamming or a welded contact closed by the current electric, a dangerous situation could arise. A second switch (2) in series solves only partially the problem because 1 welding of a contact occurs because of an abnormal excessive current which is likely to successively weld the two switch in series.
Le circuit suivant (voir figure) évite ce problème du fait que le deuxième interrupteur(2) en série est actionné avant que le volet du clapet soit dans une position comlètement ouvertc.Comme cela ce deuxièmè interrupteur(2) est toujours actionné sans courant et sans risque.de soudure aussi longtemps que le premier est en bon etat.Si le premier(1) reste électriquement fermé pour une raison quelconque bien qu'il soit relâché lorsque le clapet se ferme,le deuxième interrupteur(2) va s'ouvrir et connecter le brûleur(7) à la tensin d'alimentation(6) a travers un fusible(5) pour faible courant.Ceci fait sauter le fusible(5) et empoche le moteur(4) de continuer sa course.Une remise en marche est
impossible sans la correction de ce défaut.Cette solution a l'avantage d'être très bon marche comparée a' d'autres solations.The following circuit (see figure) avoids this problem because the second switch (2) in series is actuated before the flap of the valve is in a fully open position. Thus this second switch (2) is always actuated without current and without risk of welding as long as the first is in good condition. If the first (1) remains electrically closed for any reason although it is released when the valve closes, the second switch (2) will open and connect the burner (7) to the supply voltage (6) through a fuse (5) for low current. This blows the fuse (5) and pockets the motor (4) to continue its stroke. east walk
impossible without correcting this defect. This solution has the advantage of being very cheap compared to other solations.
Ce circuit peut être utilisé dans les dispositifs de fermeture de l'orifice d'evacuation des produits de combustion de chaudières travaillant par intermittance ou dans d'autres organes de fermeture au contrôle asservi qui posent des problèmes semblables. This circuit can be used in the closing devices of the orifice for the evacuation of combustion products from boilers working intermittently or in other closing devices with automatic control which pose similar problems.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8004112A FR2476924A1 (en) | 1980-02-25 | 1980-02-25 | Fuel safety cut=out appts. for gas or oil burner - has two contacts between burner control thermostat and burner to inhibit burner when flue blocked |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8004112A FR2476924A1 (en) | 1980-02-25 | 1980-02-25 | Fuel safety cut=out appts. for gas or oil burner - has two contacts between burner control thermostat and burner to inhibit burner when flue blocked |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2476924A1 true FR2476924A1 (en) | 1981-08-28 |
Family
ID=9238932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8004112A Withdrawn FR2476924A1 (en) | 1980-02-25 | 1980-02-25 | Fuel safety cut=out appts. for gas or oil burner - has two contacts between burner control thermostat and burner to inhibit burner when flue blocked |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2476924A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0116987A1 (en) * | 1983-02-03 | 1984-08-29 | Koninklijke Philips Electronics N.V. | Irradiation device |
WO1995028729A1 (en) * | 1994-04-13 | 1995-10-26 | Putzmeister-Werk Maschinenfabrik Gmbh | Remote control device especially for conveying, spraying and distributing machines for concrete and mortar |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2291692A7 (en) * | 1974-11-12 | 1976-06-11 | Verslype Claude | Oil fired boiler flue damper - has motorised drive with high reduction gear and operates mercury switch for burner power supply |
-
1980
- 1980-02-25 FR FR8004112A patent/FR2476924A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2291692A7 (en) * | 1974-11-12 | 1976-06-11 | Verslype Claude | Oil fired boiler flue damper - has motorised drive with high reduction gear and operates mercury switch for burner power supply |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0116987A1 (en) * | 1983-02-03 | 1984-08-29 | Koninklijke Philips Electronics N.V. | Irradiation device |
WO1995028729A1 (en) * | 1994-04-13 | 1995-10-26 | Putzmeister-Werk Maschinenfabrik Gmbh | Remote control device especially for conveying, spraying and distributing machines for concrete and mortar |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |