(19)
(11)EP 2 369 234 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 11382077.3

(22)Date of filing:  23.03.2011
(51)Int. Cl.: 
F23N 1/00  (2006.01)
F23N 5/24  (2006.01)
F23N 5/10  (2006.01)

(54)

Thermoelectric safety actuator adapted to a gas burner of a domestic appliance

An einen Gasbrenner eines Haushaltsgeräts angepasster thermoelektrischer Sicherheitsaktuator

Actionneur de sécurité thermo-électrique adapté à un brûleur de gaz d'un appareil ménager


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 24.03.2010 ES 201030440

(43)Date of publication of application:
28.09.2011 Bulletin 2011/39

(73)Proprietor: ORKLI, S. COOP.
20240 Ordizia (Gipuzkoa) (ES)

(72)Inventors:
  • Arizmendi Zurutuza, Mikel
    20240, Ordizia (ES)
  • Díez Martínez, Ignacio
    20400, Tolosa (ES)
  • Pablo Curto, Marcos
    20120, Hernani (ES)

(74)Representative: Igartua, Ismael et al
Galbaian S. Coop. Garaia Parke Teknologikoa Goiru Kalea 1
20500 Arrasate-Mondragón
20500 Arrasate-Mondragón (ES)


(56)References cited: : 
US-A- 2 363 451
US-A- 2 624 358
US-A- 3 005 487
US-A- 3 477 641
US-A1- 2005 170 302
US-A- 2 513 705
US-A- 2 844 768
US-A- 3 469 781
US-A- 3 861 587
US-B1- 6 234 189
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] This invention relates to a thermoelectric safety actuator adapted to a gas burner of a domestic appliance, in particular of an oven, water heater or other domestic appliances that are preferably supplied with natural gas or LPG.

    PRIOR ART



    [0002] There are known domestic-appliance gas burners that include thermoelectric safety devices that close the passage of gas to the burner in the absence of flame. Thermoelectric safety devices comprise magnetic units connected to a corresponding thermocouple, with the result that as long as there is a flame in the burner, the corresponding flame thermocouple keeps the corresponding magnetic unit energised and the thermoelectric device enables the passage of gas to the burner as a result. In the absence of flame, the thermocouple cools down not being able to keep the magnetic unit supplied, with the result that the magnetic unit is de-energised, thus closing the passage of gas to the burner.

    [0003] Known magnetic units in the prior art comprise an electromagnet, a frame that closes against the electromagnet when the magnetic unit is energised, and a sealing member that closes the passage of gas to the burner when it closes against the corresponding seating, the sealing member being arranged attached to the frame by a shaft.

    [0004] From the moment the burner is lit until the thermocouple is able to keep the magnetic unit energised a period of time elapses, with the result that the thermoelectric device must comprise auxiliary means which, once the magnetic unit has been reset manually, enable the magnetic unit to be kept energised until the thermocouple is able to do so by itself.

    [0005] In ES 0420874 A1, the safety device described also comprises a control button unit, so that the user must activate the control button that acts mechanically on the magnetic unit, in particular on the sealing member of the magnetic unit, which is moved along with the frame to the open position in which it allows the passage of gas to the burner, keeping it activated until the corresponding thermocouple is able to keep the magnetic unit energised.

    [0006] In US 6,886,581 B2, the magnetic unit is arranged housed in a gas valve body, the magnetic unit being arranged substantially aligned with a shaft of the valve body, with the result that the user must activate the control member of the valve body attached to the shaft so that said shaft acts on the magnetic unit, keeping it in the open or gas-passage position until the thermocouple connected to the magnetic unit is able to keep said magnetic unit energised.

    [0007] US 6,234,189 B1 describes a gas tap or valve body that includes a rod housed inside the tap, coupling means that fix a control device of the gas tap to a casing of the gas tap and to the rod, preventing the axial movement of the control device but not the rotation of said control device, and a thermoelectric safety device that comprises a magnetic unit aligned with the rod, the magnetic unit initially being activated by means of the rod. In addition, the magnetic unit is connected to a thermocouple and a control member, with the result that once the magnetic unit has been activated mechanically and the frame of said magnetic unit is arranged in contact with the electromagnet of said magnetic unit, the control member, which is activated some way when the control device is acted upon, is able to keep the magnetic unit energised temporarily. Meanwhile, the burner is lit and the thermocouple heats up and supplies sufficient current to the electromagnet to keep the magnetic unit energised, the electric power supply being cut from the control member.

    [0008] US2844768A, US2624358A, and US3005487A disclose a thermoelectric safety actuator adapted to a gas burner of a domestic appliance according to the preamble of claim 1.

    DISCLOSURE OF THE INVENTION



    [0009] The object of the invention is to provide a thermoelectric safety actuator adapted to a gas burner of a domestic appliance as defined in the claims.

    [0010] The thermoelectric safety actuator comprises an electromagnet that is connected to a thermocouple, a frame that is drawn against the electromagnet when said electromagnet is energised, a sealing member fixed to the frame, which in a rest position closes against a seating preventing the passage of gas to the burner, and auxiliary energising means that are connected to the electromagnet and adapted to keep said electromagnet energised until the thermocouple is able to keep said electromagnet energised.

    [0011] The thermoelectric safety actuator also comprises a swinging arm on the first end of which the frame is arranged fixed and on the second end of which the sealing member is arranged fixed, the swinging arm swinging between a rest position, wherein the passage of gas to the burner is closed and an activation position, wherein the electromagnet is energised and the passage of gas open.

    [0012] The thermoelectric safety actuator comprises a casing that includes a housing inside which the electromagnet, the swinging arm, the frame and the sealing member are housed, and a gas outlet conduit connected to the housing, the electromagnet being arranged substantially parallel to the gas inlet conduit. The housing of the casing is delimited by a bottom surface that includes an opening through which the electromagnet is fixed to the casing, and a seating against which the sealing member closes, the seating being arranged substantially parallel to the bottom surface, the casing further comprising, on the end opposite to the gas outlet conduit and the opening, a base, the base including external tabs and a recess in which a seal washer is inserted. The thermoelectric safety actuator is configured to be fixed to a valve body through the casing by means of the external tabs.

    [0013] As a result, a thermoelectric safety actuator that may initially be energised by the auxiliary energising means is obtained, there being no need for the user, either manually or by supplying an excessive electrical current, to reset the frame against the core of the electromagnet. The thermoelectric safety actuator is thus initially energised by the auxiliary energising means, and kept energised by said energising means until the thermocouple is able to keep said electromagnet energised.

    [0014] These and other advantages and characteristics of the invention will be made evident in the light of the drawings and the detailed description thereof.

    DESCRIPTION OF THE DRAWINGS



    [0015] 

    Figure 1 shows a perspective view of a valve body that comprises an inventive thermoelectric safety actuator.

    Figure 2 shows a perspective view of the thermoelectric safety actuator shown in Figure 1.

    Figure 3 is a top view of the thermoelectric safety actuator shown in Figure 1.

    Figure 4 is a longitudinal cross-section of the thermoelectric safety actuator shown in Figure 3 taken along the IV-IV line.



    [0016] Figure 5 shows a diagram of an automatic ignition system of a burner that comprises the thermoelectric safety actuator shown in Figure 1.

    DETAILED DISCLOSURE OF THE INVENTION



    [0017] Figure 1 shows a valve body 1 adapted to a burner of a domestic gas appliance, in particular ovens or heaters not shown in the figures, which comprises a drive shaft 2 adapted to connect a control device not shown in the figures, a conical regulation member not visible in Figure 1, which regulates the exit of gas to the burner, the conical regulation member being driven by the drive shaft 2, a gas outlet conduit 12, and a thermoelectric safety actuator 10 that prevents the passage of gas to the burner in the absence of flame. The valve body 1 comprises other elements known in the prior art, which are not necessary in order to understand the invention and have thus been omitted from the description.

    [0018] In addition, the burner 6, shown schematically in Figure 5 also comprises ignition means 3 that generate the necessary spark in the burner 6 and which are activated by auxiliary energising means 4, the ignition means 3 being arranged connected to the valve body 1, as shown in Figure 1, and a flame thermocouple 7 that is arranged connected to the thermoelectric safety actuator 10, which functions in a manner described at a later stage. The thermoelectric safety actuator 10 shown in detail in Figures 2 to 4, comprises a casing 11, a gas outlet conduit 12 built into the casing 11, an electromagnet 21 shown in detail in Figure 4, which includes a core 21b, preferably U-shaped, and a single coil 21a wound around the core 21b, a ferromagnetic frame 20 that closes against transverse free surfaces 19 of the electromagnet 21 when said electromagnet 21 is energised, a sealing member 23 attached to the frame 20, which in a rest position of the thermoelectric safety actuator 10 closes against a seating 13a of the gas outlet conduit 12, and a swinging arm 22, on the first end 22a of which the frame 20 is arranged fixed, while on the second end 22b of which the sealing member 23 is arranged fixed. The thermoelectric safety actuator 10 also comprises means 27 of returning the swinging arm 22 from an activation position, in which the electromagnet 21 is energised and the sealing member 23 separated from the seating 13a, to the rest position in which the sealing member 23 closes against the seating 13a to close the passage of gas to the burner.

    [0019] The thermoelectric safety actuator 10 also comprises a metal sleeve 17 providing an electrical connection to the mass, on which is fixed the electromagnet 21, a connection terminal 18 being arranged connected on the end opposite to the electromagnet 21, through which the thermocouple 7 and the auxiliary energising means 4, shown schematically in Figure 5, are arranged connected to said thermoelectric safety actuator 10.

    [0020] In addition, the casing 11 comprises a housing 13 inside which is tightly housed the electromagnet 21, the frame 20, the sealing member 23 and the swinging arm 22. The housing 13 is delimited by a bottom surface 13b that includes an opening 16 passed through at least partially by the sleeve 17, which acts as a seating of the electromagnet 21, and by the electromagnet 21 itself, the sleeve 17 being fixed to the casing 11 through said opening 16. Once the sleeve 17 has been fixed to the casing 11, the transverse free surfaces 19 of the core 21b against which the frame 20 is drawn project out in relation to the surface of the casing 11, which acts as a seating 13a for the sealing member 23, with the result that when the electromagnet 21 is energised the gap between said seating 13a and the sealing member 23 is sufficient to enable the passage of gas to the burner, and that in the rest position, when the sealing member 23 comes up against the seating 13a, the gap between the free surfaces 19 and the frame 20 is optimised in order to reset the electromagnet 21 by means of the auxiliary energising means 4, without needing a manual reset.

    [0021] Furthermore, on the bottom surface 13b of the housing 13 fixed supports 24 of the swinging arm 22 are arranged in a fixed manner, which are arranged connected to each other by means of a plate 25 fixed to both supports 24, arranged substantially parallel to the swinging arm 22, as shown in Figure 2. The plate 25, which is substantially rectangular, includes a projection 25b that projects out axially, on which the return means 27 are coupled.

    [0022] Finally, the swinging arm 22 comprises a projection 22f that projects out axially from a surface 22c of the swinging arm 22 that is arranged facing the plate 25, the return means 27 of the swinging arm 22 being coupled on the projection 22f. The projection 22f of the swinging arm 22, which is arranged substantially displaced in relation to one of the axes of symmetry of said swinging arm 22, determines the swing axis of said swinging arm 22. In addition, the return means 27 comprise a spring, with the result that by means of the spring 27 the swinging arm 22 is arranged coupled to the plate 25, it being capable of swinging between the rest position and the activation position.

    [0023] The thermoelectric safety actuator 10 is fixed to the valve body 1 through the casing 11, for the purposes of which the casing 11 comprises on the end opposite the gas outlet conduit 12 and the opening 16, a base 14, the base 14 including external tabs 15 by means of which it is fixed to the actuator 10 to the valve body 1, and a recess 14a in which is inserted a seal washer not shown in the figures. The thermoelectric safety actuator 10 can be fitted to the valve body 1 quickly and easily, with the thermoelectric safety actuator 10 being capable of being fitted to various valve bodies 1. Additionally, this configuration facilitates maintenance, as any element forming part of the safety actuator 1 may be easily replaced.

    [0024] Finally, Figure 5 shows an automatic ignition system adapted to a burner of a domestic gas appliance, which comprises the thermoelectric safety actuator 10, the auxiliary energising means 4, which comprise an electronic driver connected to the thermoelectric safety actuator 10 by means of the connection terminal 18, the thermocouple 7 connected to the thermoelectric safety actuator 10 by means of the connection terminal 18 and arranged close to the corresponding burner 6, and the spark-generating ignition means 3 connected to the electronic driver and arranged close to the burner 6.

    [0025] When the user activates a control switch 5 to light the corresponding burner 6, the control switch 5 sends the corresponding command to the electronic driver so that it provides the necessary electric power to the electromagnet 21 in order to energise it, attracting the frame 20 without the need for the user to act directly on the electromagnet 21 and position the frame 20 against the electromagnet 21 manually. The electronic driver provides the necessary electric power to attract the frame 20 to the electromagnet 21, and keep it energised for a certain period of time at the same time as it acts on the ignition means 3 so that they generate the necessary sparks.

    [0026] If the flame has been lit, the thermocouple 7 heats up and also generates electric power with which the electromagnet 21 is supplied so that it can continue to be energised without consuming energy. The ignition system may thus be supplied initially by standard batteries.

    [0027] Following an initial preset time, the electronic driver cuts the supply of electric power to the actuator 10, with the result that if there is no flame or if it is too weak to enable the thermocouple 7 to generate sufficient electric power to keep the electromagnet 21 energised, the swinging arm 22 of the actuator 10 is situated in the rest position, closing the passage of gas to the burner.

    [0028] In the event that the flame has gone out, the electronic driver activates the ignition means 3 again so that they generate more sparks and relight the flame. If the flame does not light up again, the actuator 10 closes the passage of gas because the thermocouple 7 has cooled and de-energises the electromagnet 21 as a result.


    Claims

    1. Thermoelectric safety actuator for a gas burner of a domestic appliance that comprises an electromagnet (21) connectable to a thermocouple (7) and to auxiliary energising means (4) adapted to keep said electromagnet (21) energised until the thermocouple (7) is able to keep said electromagnet (21) energised, a frame (20) that closes against the electromagnet (21) when said electromagnet (21) is energised, and a sealing member (23) fixed to the frame (20), which in a rest position closes against a seating (13a) preventing the passage of gas to the burner, the thermoelectric safety actuator (10) also comprising a swinging arm (22) on the first end (22a) of which the frame (20) is arranged fixed and on the second end (22b) of which the sealing member (23) is arranged fixed, the swinging arm (22) swinging between a rest position wherein the passage of gas to the burner is closed and an activation position, wherein the electromagnet (21) is energised and the passage of gas open, the electromagnet (21) initially being energised by the auxiliary energising means (4) and kept energised by said energising means (4) until the thermocouple (7) is able to keep said electromagnet energised (21), characterised in that the thermoelectric safety actuator (10) comprises a casing (11) that includes a housing (13) inside which the electromagnet (21), the swinging arm (22), the frame (20) and the sealing member (23) are housed, and a gas outlet conduit (12) connected to the housing (13), the electromagnet (21) being arranged substantially parallel to the gas outlet conduit (12), the housing (13) being delimited by a bottom surface (13b) that includes an opening (16) through which the electromagnet (21) is fixed to the casing (11), and the seating (13a) against which the sealing member (23) closes, the seating (13a) being arranged substantially parallel to the bottom surface (13b), the casing (11) further comprising, on the end opposite to the gas outlet conduit (12) and the opening (16), a base (14), the base (14) including external tabs (15) and a recess (14a) in which a seal washer is inserted, the thermoelectric safety actuator (10) being configured to be fixed to a valve body (1) through the casing (11) by means of the external tabs (15).
     
    2. Thermoelectric safety actuator according to the preceding claim, wherein the electromagnet (21) comprises a substantially U-shaped core (21b), and a single coil (21a) wound around the core (21b), the coil (21a) being arranged connected to the thermocouple (7) and the auxiliary energising means (4) by means of a connection terminal (18).
     
    3. Thermoelectric safety actuator according to any of the preceding claims, comprising means (27) of returning the swinging arm (22) to the rest position, the swinging arm (22) being arranged coupled to a fixed support (24) by the return means (27).
     
    4. Thermoelectric safety actuator according to the preceding claim, comprising a plate (25) arranged substantially parallel to the swinging arm (22), through which said swinging arm (22) is coupled to the fixed support (24), the plate (25) including a projection (25b) on which the return means (27) are coupled substantially concentrically.
     
    5. Thermoelectric safety actuator according to claims 3 or 4, wherein the swinging arm (22) comprises a projection (22f) on which the return means (27) are coupled substantially concentrically.
     
    6. Thermoelectric safety actuator according to any of the preceding claims, wherein the electromagnet (21) includes free surfaces (19) against which the frame (20) comes into contact, the electromagnet (21) being arranged inside the housing (13) of the casing (11) with the result that the free surfaces (19) project out in relation to the seating (13a).
     
    7. Valve body that comprises a thermoelectric safety actuator (10) according to any of the preceding claims.
     
    8. Automatic ignition system adapted to a burner of a domestic appliance, comprising the thermoelectric safety actuator (10) according to any of the claims 1 to 6, the thermocouple (7) that is connected to the thermoelectric safety actuator (10), and the auxiliary energising means (4) that are connected to the thermoelectric safety actuator (10).
     
    9. Automatic ignition system according to the preceding claim, wherein the auxiliary energising means (4) comprise an electronic driver that, when controlled by a control switch (5), provides the electromagnet (21) with the necessary electric power to reset said electromagnet (21).
     


    Ansprüche

    1. Thermoelektrischer Sicherheitsaktuator für einen Gasbrenner eines Haushaltsgeräts, welcher einen Elektromagnet (21), welcher an einem Thermoelement (7) und an Hilfserregungsmitteln (4) angeschlossen werden kann, welche Hilfserregungsmittel (4) dazu angepasst sind, den genannten Elektromagnet (21) erregt zu halten, bis das Thermoelement (7) in der Lage ist, den genannten Elektromagnet (21) erregt zu halten, einen Rahmen (20), welcher gegen den Elektromagnet (21) schließt, wenn der genannte Elektromagnet (21) erregt wird, und ein Dichtungsglied (23), welches am Rahmen (20) fixiert ist und welches in einer Ruhestellung gegen einen Sitz (13a) schließt, sodass der Durchgang von Gas zum Brenner verhindert wird, umfasst, wobei der thermoelektrische Sicherheitsaktuator (10) auch einen Schwenkarm (22) umfasst, auf dessen ersten Ende (22a) der Rahmen (20) fixiert angeordnet ist und auf dessen zweiten Ende (22b) das Dichtungsglied (23) fixiert angeordnet ist, wobei der Schwenkarm (22) zwischen einer Ruhestellung, in welcher der Durchgang von gas zum Brenner geschlossen ist, und einer Aktivierungsstellung, in welcher der Elektromagnet (21) erregt wird und der Durchgang von gas offen ist, schwenk, wobei der Elektromagnet (21) anfänglich von den Hilfserregungsmitteln (4) erregt wird und von den genannten Erregungsmitteln (4) erregt gehalten wird, bis das Thermoelement (7) in der Lage ist, den genannten Elektromagnet (21) erregt zu halten, dadurch gekennzeichnet, dass der thermoelektrische Sicherheitsaktuator (10) ein Gehäuse (11), welches eine Aufnahme (13) beinhaltet, innerhalb welcher der Elektromagnet (21), der Schwenkarm (22), der Rahmen (20) und das Dichtungsglied (23) aufgenommen sind, und eine Gasaustrittsleitung (12), welche an der Aufnahme (13) angeschlossen ist, umfasst, wobei der Elektromagnet (21) im Wesentlichen parallel zur Gasaustrittsleitung (12) angeordnet ist, wobei die Aufnahme (13) durch eine untere Oberfläche (13b), welche eine Öffnung (16) beinhaltet, durch welche der Elektromagnet (21) am Gehäuse (11) fixiert ist, und den Sitz (13a), gegen welchen das Dichtungsglied (23) schließt, begrenzt wird, wobei der Sitz (13a) im Wesentlichen parallel zur unteren Oberfläche (13b) angeordnet ist, wobei das Gehäuse (11) zusätzlich, auf dem zur Gasaustrittsleitung (12) und zur Öffnung (16) gegenüberliegenden Ende, eine Basis (14) umfasst, wobei die Basis (14) äußere Laschen (15) und eine Aussparung (14a) beinhaltet, in welche eine Dichtungsscheibe eingeführt wird, wobei der thermoelektrische Sicherheitsaktuator (10) dazu ausgebildet ist, am Ventilkörper (1) durch das Gehäuse (11) mittels der äußeren Laschen (15) fixiert zu werden.
     
    2. Thermoelektrischer Sicherheitsaktuator nach dem vorhergehenden Anspruch, wobei der Elektromagnet (21) einen im Wesentlichen U-förmigen Kern (21b) und eine Einfachspule (21a), welche um den Kern (21b) herum gewickelt ist, umfasst, wobei die Spule (21a) derart angeordnet ist, dass sie am Thermoelement (7) und an den Hilfserregungsmitteln (4) mittels einer Anschlussklemme (18) angeschlossen ist.
     
    3. Thermoelektrischer Sicherheitsaktuator nach einem der vorhergehenden Ansprüche, umfassend Mittel (27) zur Rückkehr des Schwenkarms (22) zur Ruhestellung, wobei der Schwenkarm (22) mit einem fixierten Halter (24) mittels der Rückkehrmittel (27) gekoppelt angeordnet ist.
     
    4. Thermoelektrischer Sicherheitsaktuator nach dem vorhergehenden Anspruch, umfassend eine Platte (25), welche im Wesentlichen parallel zum Schwenkarm (22) angeordnet ist, durch welche der genannte Schwenkarm (22) mit dem fixierten Halter support (24) gekoppelt ist, wobei die Platte (25) einen Vorsprung (25b) beinhaltet, auf welchem die Rückkehrmittel (27) im Wesentlichen konzentrisch gekoppelt sind.
     
    5. Thermoelektrischer Sicherheitsaktuator nach den Ansprüchen 3 oder 4, wobei der Schwenkarm (22) einen Vorsprung (22f) umfasst, auf welche die Rückkehrmittel (27) im Wesentlichen konzentrisch gekoppelt sind.
     
    6. Thermoelektrischer Sicherheitsaktuator nach einem der vorhergehenden Ansprüche, wobei der Elektromagnet (21) freie Oberflächen (19) beinhaltet, mit welchen der Rahmen (20) in Kontakt kommt, wobei der Elektromagnet (21) innerhalb der Aufnahme (13) des Gehäuses (11) angeordnet ist, mit dem Ergebnis, dass die freien Oberflächen (19) bezüglich des Sitzes (13a) hervorstehen.
     
    7. Ventilkörper, welcher einen thermoelektrischem Sicherheitsaktuator (10) nach einem der vorhergehenden Ansprüche umfasst.
     
    8. Automatisches Zündsystem, welches an einen Brenner eines Haushaltsgeräts angepasst ist, umfassend den thermoelektrischen Sicherheitsaktuator (10) nach einem der Ansprüche 1 bis 6, das Thermoelement (7), welches am thermoelektrischen Sicherheitsaktuator (10) angeschlossen ist, und die Hilfserregungsmittel (4), welche am thermoelektrischen Sicherheitsaktuator (10) angeschlossen sind.
     
    9. Automatisches Zündsystem nach dem vorhergehenden Anspruch, wobei die Hilfserregungsmittel (4) einen elektronischen Antrieb umfassen, welcher, wenn er von einem Steuerschalter (5) gesteuert wird, dem Elektromagneten (21) die nötige elektrische Energie bereitstellt, um den genannten Elektromagnet (21) rückzusetzen.
     


    Revendications

    1. Actionneur de sécurité thermoélectrique pour un brûleur de gaz d'un appareil ménager qui comprend un électro-aimant (21) connectable à un thermocouple (7) et à des moyens d'alimentation auxiliaires (4) adaptés pour maintenir ledit électro-aimant (21) alimenté jusqu'à ce que le thermocouple (7) est apte à maintenir ledit électro-aimant (21) alimenté, un châssis (20) qui se ferme contre l'électro-aimant (21) lorsque ledit électro-aimant (21) est alimenté, et un élément d'étanchéité (23) fixé au châssis (20), qui dans une position de repos se ferme contre un siège (13a) empêchant le passage de gaz vers le brûleur, l'actionneur de sécurité thermoélectrique (10), l'actionneur de sécurité thermoélectrique (10) comprenant également un bras oscillant (22) sur la première extrémité (22a) duquel le châssis (20) est fixé et sur la seconde extrémité (22) duquel l'élément d'étanchéité (23) est fixé, le bras oscillant (22) oscillant entre une position de repos dans laquelle le passage de gaz vers le brûleur est fermé et une position d'activation, dans laquelle l'électro-aimant (21) est alimenté et le passage de gaz est ouvert, l'électro-aimant (21) étant initialement alimenté par les moyens d'alimentation auxiliaires (4) et maintenu alimenté par lesdits moyens d'alimentation (4) jusqu'à ce que le thermocouple (7) est apte à maintenir ledit électro-aimant (21) alimenté, caractérisé en ce que l'actionneur de sécurité thermoélectrique (10) comprend un boîtier (11) qui comporte un logement (13) à l'intérieur duquel sont logés l'électro-aimant (21), le bras oscillant (22), le châssis (20) et l'élément d'étanchéité (23), et un conduit de sortie de gaz (12) connecté au logement (13), l'électro-aimant (21) étant aménagé de manière essentiellement parallèle au conduit de sortie de gaz (12), le logement (13) étant délimité par une surface de fond (13b) qui comporte une ouverture (16) à travers laquelle l'électro-aimant (21) est fixé au boîtier (11) et le siège (13a) contre lequel se ferme l'élément d'étanchéité (23), le siège (13a) étant aménagé de manière essentiellement parallèle à la surface de fond (13b), le boîtier (11) comprenant en outre, sur l'extrémité opposée au conduit de sortie de gaz (12) et l'ouverture (16), une base (14), la base (14) comportant des languettes extérieures (15) et un évidement (14a) dans lequel est insérée une rondelle d'étanchéité, l'actionneur de sécurité thermoélectrique (10) étant configuré pour être fixé à un corps de vanne (11) à travers le boîtier (11) par le biais des languettes extérieures (15).
     
    2. Actionneur de sécurité thermoélectrique selon la revendication précédente, dans lequel l'électro-aimant (21) comprend un noyau essentiellement en forme de U (21b) une bobine simple (21a) enroulée autour du noyau (21b), la bobine (21a) étant connectée au thermocouple (7) et les moyens d'alimentation auxiliaires (4) par le biais d'une borne de raccordement (18).
     
    3. Actionneur de sécurité thermoélectrique selon l'une quelconque des revendications précédentes, comprenant des moyens (27) pour retourner le bras oscillant (22) à la position de repos, le bras oscillant (22) étant couplé à un support fixe (24) par les moyens de retour (27).
     
    4. Actionneur de sécurité thermoélectrique selon la revendication précédente, comprenant une plaque (25) aménagée de manière essentiellement parallèle au bras oscillant (22), à travers laquelle ledit bras oscillant (22) est couplé au support fixe (24), la plaque (25) comportant une saillie (25b) sur laquelle les moyens de retour (27) sont couplés de manière essentiellement concentrique.
     
    5. Actionneur de sécurité thermoélectrique selon les revendications 3 ou 4, dans lequel le bras oscillant (22) comprend une saillie (22f) sur laquelle les moyens de retour (27) sont couplés de manière essentiellement concentrique.
     
    6. Actionneur de sécurité thermoélectrique selon l'une quelconque des revendications précédentes, dans lequel l'électro-aimant (21) comporte des surfaces libres (19) contre lesquelles entre en contact le châssis (20), l'électro-aimant (21) étant aménagé à l'intérieur du logement (13) du boîtier (11) en ayant comme résultat que les surfaces libres (19) dépassent par rapport au siège (13a).
     
    7. Corps de vanne qui comprend un actionneur de sécurité thermoélectrique (10) selon l'une quelconque des revendications précédentes.
     
    8. Système d'allumage automatique adapté à un brûleur d'un appareil ménager, comprenant l'actionneur de sécurité thermoélectrique (10) selon l'une quelconque des revendications 1 à 6, le thermocouple (7) qui est connecté à l'actionneur de sécurité thermoélectrique (10), et les moyens d'alimentation auxiliaires (4) qui sont connectés à l'actionneur de sécurité thermoélectrique (10).
     
    9. Système d'allumage automatique selon la revendication précédente, dans lequel les moyens d'alimentation auxiliaires (4) comprennent une commande électronique qui, lorsqu'elle est contrôlée par un commutateur de contrôle (5), elle fournit à l'électro-aimant (21) l'énergie électrique nécessaire pour la réinitialisation dudit électro-aimant (21).
     




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    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description