EP1766647B1 - Control thermostat provided with a holding device - Google Patents

Control thermostat provided with a holding device Download PDF

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Publication number
EP1766647B1
EP1766647B1 EP05773019A EP05773019A EP1766647B1 EP 1766647 B1 EP1766647 B1 EP 1766647B1 EP 05773019 A EP05773019 A EP 05773019A EP 05773019 A EP05773019 A EP 05773019A EP 1766647 B1 EP1766647 B1 EP 1766647B1
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EP
European Patent Office
Prior art keywords
probe
slider
safety
type thermostat
thermostat according
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Not-in-force
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EP05773019A
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German (de)
French (fr)
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EP1766647A1 (en
Inventor
Bernard Roques
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Cotherm SA
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Cotherm SA
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Publication of EP1766647A1 publication Critical patent/EP1766647A1/en
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Publication of EP1766647B1 publication Critical patent/EP1766647B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/60—Means for producing snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/323—Thermally-sensitive members making use of shape memory materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/002—Thermally-actuated switches combined with protective means

Abstract

The inventive probe thermostat comprises an electromechanical temperature control system arranged in a pedestal enclosure (3) closed by a casing (13), wherein said temperature control system consists of a probe (2) provided with a high-expansion metal tube (5) inside of which a low-expansion metal rod (7) is disposed, a safety device (15) for opening safety breakers (29, 30) when the temperature is greater than a minimum thermal threshold thereof and a holding device (18, 20) for converting the low expansion movement of the safety device (15) in to a sudden movement for opening the contacts (31, 32) of the elastic blades (27, 28) of each safety breaker (29, 30). Said holding device temporarily acts on a sliding unit (17) which contacts each safety breaker(29, 30) and is connected to the safety device.

Description

La présente invention est relative à un thermostat de régulation comportant un dispositif de retenue cédant sous une force déterminée afin de créer un mouvement d'ouverture rapide et brusque du dispositif de sécurité.The present invention relates to a control thermostat comprising a retaining device yielding under a given force to create a rapid and sudden opening movement of the safety device.

On connaît d'après le brevet EP 743666 appartenant au demandeur, un thermostat de régulation constitué d'un ressort en alliage à mémoire de forme permettant, lors d'une élévation anormale de la température de l'installation, d'agir sur les rupteurs de sécurité assurant la coupure du courant électrique dans l'installation de chauffage.We know from the patent EP 743666 belonging to the applicant, a control thermostat consisting of a shape memory alloy spring allowing, during an abnormal rise in the temperature of the installation, to act on the safety breakers ensuring the cut-off of the electric current in the heating system.

On note que ce dispositif de sécurité par ressort en alliage à mémoire de forme présente une dilatation lente entraînant de fait une ouverture lente des rupteurs de sécurité.It should be noted that this spring safety device made of a shape memory alloy has a slow expansion, which in fact leads to a slow opening of the safety switches.

L'objet de la présente invention est de réaliser et de perfectionner le thermostat décrit soit dans le brevet EP 743666 , soit dans le brevet FR2 735 278 en améliorant le dispositif de sécurité afin que l'un au moins des rupteurs de sécurité s'ouvre rapidement sous l'effet d'une augmentation anormale de la température de l'installation.The object of the present invention is to achieve and perfect the thermostat described in the patent EP 743666 , either in the patent FR2 735 278 by improving the safety device so that at least one of the safety breakers opens quickly under the effect of an abnormal increase in the temperature of the installation.

Le thermostat à sonde suivant la présente invention comprend, à partir d'un socle fermé par un boîtier, un système électromécanique de régulation de la température constitué d'une sonde comportant un tube métallique à fort coefficient de dilatation, à l'intérieur duquel est positionnée une tige de métal à faible coefficient de dilatation, un dispositif de sécurité permettant, lors d'une élévation de température dépassant celle du seuil thermique minimal du dispositif de sécurité, l'ouverture des rupteurs de sécurité et un dispositif de retenue temporaire à réarmement manuel comprenant un coulisseau pourvu d'un bossage présentant sur sa face externe un profil dentelé destiné à coopérer avec un clip élastique solidaire du socle et présentant une extrémité libre en forme de bec dont le profil est complémentaire à celui dentelé du bossage afin de transformer le mouvement lent de dilatation du dispositif de sécurité en un mouvement d'ouverture brusque de l'un au moins des rupteurs de sécurité.The probe thermostat according to the present invention comprises, from a pedestal closed by a housing, an electromechanical system for regulating the temperature consisting of a probe comprising a metal tube with a high coefficient of expansion, inside which is positioned a metal rod with a low coefficient of expansion, a safety device allowing, at a temperature rise exceeding that of the minimum thermal threshold of the safety device, the opening of the safety switches and a temporary resetting device manual comprising a slider provided with a boss having on its outer face a serrated profile intended to cooperate with an elastic clip secured to the base and having a free end in the form of a beak whose profile is complementary to that serrated boss to transform the slow movement of expansion of the safety device in a sudden opening movement at least one of the safety breakers.

Le thermostat à sonde suivant la présente invention comprend une sonde comportant, au-dessus du sertissage de la tige de métal avec le tube, une gorge périphérique formant une butée interne permettant la retenue, à l'intérieur du tube et entre ce dernier et la tige de métal, du dispositif de sécurité constitué d'un ressort en alliage à mémoire de forme.The probe thermostat according to the present invention comprises a probe having, above the crimping of the metal rod with the tube, a peripheral groove forming an internal abutment for retaining, inside the tube and between the latter and the metal rod, of the security device consisting of a shape memory alloy spring.

Le thermostat à sonde suivant la présente invention comprend une sonde comportant une entretoise cylindrique qui est disposée entre le tube et la tige de métal et dont l'une de ses extrémités vient en appui contre le ressort, tandis que l'autre extrémité est en appui contre le coulisseau en matière isolante.The probe thermostat according to the present invention comprises a probe having a cylindrical spacer which is disposed between the tube and the rod of metal and one of whose ends bears against the spring, while the other end bears against the slide of insulating material.

Le thermostat à sonde suivant la présente invention comprend un coulisseau qui comporte en son milieu un bossage présentant sur sa face externe un profil dentelé destiné à coopérer avec un clip élastique solidaire du socle afin de réaliser le dispositif de retenue temporaire dudit coulisseau.The probe thermostat according to the present invention comprises a slider which comprises in its middle a boss having on its outer face a serrated profile intended to cooperate with an elastic clip secured to the base in order to achieve the temporary retention device of said slider.

Le thermostat à sonde suivant la présente invention comprend un coulisseau comportant une aile horizontale solidaire d'un bossage présentant sur sa face externe un profil dentelé destiné à coopérer avec un clip élastique solidaire du socle afin de réaliser le dispositif de retenue temporaire dudit coulisseau.The probe thermostat according to the present invention comprises a slider having a horizontal flange integral with a boss having on its outer face a serrated profile intended to cooperate with an elastic clip secured to the base in order to achieve the temporary retention device of said slider.

Le thermostat à sonde suivant la présente invention comprend un bossage dont le profil dentelé comporte un pan inférieur qui est incliné d'un angle α compris entre 25 et 35 degrés par rapport à un axe vertical xx'.The probe thermostat according to the present invention comprises a boss whose serrated profile comprises a lower pan which is inclined at an angle α of between 25 and 35 degrees with respect to a vertical axis xx '.

Le thermostat à sonde suivant la présente invention comprend un clip élastique présentant une extrémité libre en forme de bec dont le profil est complémentaire à celui dentelé du bossage.The probe thermostat according to the present invention comprises an elastic clip having a free end shaped nozzle whose profile is complementary to that serrated boss.

Le thermostat à sonde suivant la présente invention comprend un coulisseau qui comporte à partir de son milieu et suivant des directions diamétralement opposées deux ailes solidaires chacune d'un poussoir s'étendant verticalement dans des plans parallèles à celui contenant l'axe de déplacement du coulisseau et à proximité du poussoir un doigt de réarmement qui se dirige verticalement en direction de l'extérieur du boîtier.The probe thermostat according to the present invention comprises a slide which comprises from its middle and in diametrically opposite directions two wings each secured to a pusher extending vertically in planes parallel to that containing the axis of movement of the slider and near the pusher a resetting finger which is directed vertically towards the outside of the housing.

Le thermostat à sonde suivant la présente invention comprend un dispositif de sécurité qui est constitué d'un ressort en alliage à mémoire de forme disposé dans un logement ménagé dans le socle en dessous de la lame élastique du rupteur de sécurité, ledit logement se trouvant à proximité immédiate de la sonde de manière que le dispositif de sécurité suive l'évolution de la température de l'eau avec un gradient thermique minimal.The probe thermostat according to the present invention comprises a safety device which consists of a shape memory alloy spring disposed in a housing formed in the base below the elastic blade of the safety switch, said housing being immediate proximity of the probe so that the safety device follows the evolution of the temperature of the water with a minimum thermal gradient.

Le thermostat à sonde suivant la présente invention comprend un coulisseau comportant dans le prolongement du ressort un poussoir qui vient en contact avec la lame élastique du rupteur, ledit coulisseau étant solidaire d'une aile s'étendant horizontalement et comportant à son extrémité libre un second poussoir dirigé verticalement afin de coopérer avec un dispositif de réarmement.The probe thermostat according to the present invention comprises a slider comprising in the extension of the spring a pusher which comes into contact with the resilient blade of the switch, said slider being integral with a wing extending horizontally and having at its free end a second pusher directed vertically to cooperate with a rearming device.

La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Figure 1 est une vue en perspective éclatée montrant un thermostat à régulation unipolaire et à sécurité bipolaire pourvu d'un dispositif de retenue suivant la présente invention.
  • Figure 2 et 3 sont des vues en coupe illustrant le thermostat à régulation unipolaire et à sécurité bipolaire pourvu d'un dispositif de retenue suivant la présente invention.
  • Figure 4 est une vue en perspective représentant le thermostat à régulation unipolaire et à sécurité bipolaire et son dispositif de sécurité en position fermée.
  • Figure 5 est une vue en perspective illustrant le thermostat à régulation unipolaire et à sécurité bipolaire et son dispositif de sécurité en position ouverte.
  • Figures 6 et 7 sont des vues en coupe représentant en détail le dispositif de retenue du thermostat à régulation unipolaire et à sécurité bipolaire suivant la présente invention.
  • Figures 8 à 10 sont des vues montrant un thermostat à régulation unipolaire et à sécurité unipolaire pourvu d'un dispositif de retenue suivant la présente invention.
The following description with reference to the accompanying drawings, given by way of non-limiting examples, will provide a better understanding of the invention, the characteristics that it presents and the advantages that it is likely to provide:
  • Figure 1 is an exploded perspective view showing a bipolar unipolar regulated thermostat provided with a retaining device according to the present invention.
  • Figure 2 and 3 are cross-sectional views illustrating the unipolar, bipolar safety thermostat provided with a retainer according to the present invention.
  • Figure 4 is a perspective view showing the unipolar and bipolar safety thermostat and its safety device in the closed position.
  • Figure 5 is a perspective view illustrating the unipolar and bipolar safety thermostat and its safety device in the open position.
  • Figures 6 and 7 are cross-sectional views showing in detail the unipolar and bipolar safety thermostat retaining device according to the present invention.
  • Figures 8 to 10 are views showing a unipolar and unipolar safety thermostat provided with a retaining device according to the present invention.

On a montré en figures 1 à 7 un thermostat à régulation unipolaire-et à sécurité bipolaire 1 comportant une sonde 2, un socle 3 en matière plastique sur lequel vient se fixer un boîtier 13 afin de renfermer un mécanisme de commande 4 du circuit d'alimentation d'un système de chauffage d'un chauffe eau électrique.We have shown in Figures 1 to 7 a unipolar-and bipolar-safety thermostat 1 comprising a probe 2, a plastic base 3 on which a housing 13 is fixed to enclose a control mechanism 4 of the supply circuit of a heating system; an electric water heater.

La sonde 2 comporte un tube 5 à fort coefficient de dilatation qui est assujetti au socle 3 à l'intérieur d'un alésage 6 débouchant au niveau du mécanisme de commande 4.The probe 2 comprises a tube 5 with a high coefficient of expansion which is secured to the base 3 inside a bore 6 opening at the level of the control mechanism 4.

A l'intérieur du tube 5 est disposée une tige de métal 7 à faible coefficient de dilatation dont l'une des extrémités 8 est sertie au tube 5, tandis que l'autre extrémité 9 coopère avec un organe de réglage 10 constitué d'un écrou 11 et d'un cache écrou 12 encliqueté sur le boîtier 13.Inside the tube 5 is disposed a metal rod 7 with a low coefficient of expansion, one of the ends 8 of which is crimped to the tube 5, while the other end 9 cooperates with an adjustment member 10 consisting of a nut 11 and a nut cover 12 snapped onto the housing 13.

La sonde 2 comporte au-dessus du sertissage de l'extrémité 8 de la tige de métal 7 avec le tube 5 un rétrécissement du diamètre externe de ce dernier constituant une gorge périphérique 14.The probe 2 comprises above the crimping of the end 8 of the metal rod 7 with the tube 5 a narrowing of the external diameter of the latter constituting a peripheral groove 14.

Cette dernière forme une butée interne permettant la retenue à l'intérieur du tube 5 et entre ce dernier et la tige de métal 7 d'un dispositif de sécurité constitué d'un ressort 15 en alliage à mémoire de forme, d'une entretoise cylindrique 16 et d'un coulisseau 17. Le ressort 15 comporte une série de spirales venant autour de la tige de métal 7.The latter forms an internal abutment for retaining inside the tube 5 and between the latter and the metal rod 7 of a security device consisting of a shape memory alloy spring 15, a cylindrical spacer 16 and a slider 17. The spring 15 has a series of spirals coming around the metal rod 7.

La sonde 2 comporte une entretoise cylindrique 16 qui-est disposée entre le tube 5 et la tige de métal 7 dont l'une de ses extrémités vient en appui contre le ressort 15, tandis que l'autre extrémité débouche à l'intérieur de l'espace délimité par l'alésage 6 permettant la fixation du tube 5 sur le socle 3.The probe 2 comprises a cylindrical spacer 16 which is arranged between the tube 5 and the metal rod 7, one of its ends abuts against the spring 15, while the other end opens into the inside of the tube. space defined by the bore 6 for fixing the tube 5 on the base 3.

Au-dessus et en appui contre l'entretoise cylindrique 16 est prévu un coulisseau 17 en matière isolante telle que du plastique. Le coulisseau 17 est traversé par la tige en métal 7 et peut se déplacer en va et vient vertical à l'intérieur de l'alésage 6 du socle 3.Above and in abutment against the cylindrical spacer 16 is provided a slide 17 of insulating material such as plastic. The slider 17 is crossed by the metal rod 7 and can move back and forth vertically inside the bore 6 of the base 3.

Le coulisseau 17 comporte en son milieu un dispositif de retenue qui est constitué d'un bossage 18 présentant sur sa face externe un profil dentelé 19 destiné à coopérer avec un clip élastique 20 solidaire du socle 3 afin de réaliser un dispositif de retenue temporaire du dispositif de sécurité. Le clip élastique 20 présente une extrémité libre en forme de bec 21 dont le profil est complémentaire à celui dentelé 19 du bossage 18.The slider 17 comprises in its middle a retaining device which consists of a boss 18 having on its outer face a serrated profile 19 intended to cooperate with an elastic clip 20 integral with the base 3 in order to provide a device for temporarily retaining the device of security. The elastic clip 20 has a free end shaped spout 21 whose profile is complementary to that serrated 19 of the boss 18.

Le profil dentelé 19 présente un pan inférieur 45 qui est incliné d'un angle α par rapport à un axe vertical xx' parallèle ou confondu à celui du tube 5 à l'intérieur du quel est disposée la tige de métal 7. L'angle d'inclinaison a du pan inférieur 45 est compris entre 25 et 35 degrés (figures 6 et 7).The serrated profile 19 has a lower flange 45 which is inclined at an angle α with respect to a vertical axis xx 'parallel to or coincident with that of the tube 5 inside which the metal rod 7 is disposed. The angle The inclination angle of the lower pan 45 is between 25 and 35 degrees ( Figures 6 and 7 ).

Le dispositif de retenue permet de bloquer temporairement le coulisseau 17 dans ses déplacements verticaux. En effet, le dispositif de retenue est prévu pour céder sous force prédéterminée et maîtrisée lors de la fabrication du thermostat.The retaining device makes it possible to temporarily block the slide 17 in its vertical displacements. Indeed, the retaining device is provided to yield under predetermined force and controlled during the manufacture of the thermostat.

Le coulisseau 17 comporte, à partir de son milieu et suivant des directions diamétralement opposées, deux ailes 22, 23 solidaires chacune d'un poussoir 24, 25 s'étendant verticalement dans des plans parallèles à celui contenant l'axe de déplacement du coulisseau 17. L'une au moins des ailes 22, 23 et plus particulièrement 23 comporte à proximité de son poussoir 25 un doigt de réarmement 26 qui se dirige verticalement en direction de l'extérieur du boîtier 13.The slide 17 comprises, from its middle and in diametrically opposed directions, two wings 22, 23 each integral with a pusher 24, 25 extending vertically in planes parallel to that containing the axis of movement of the slide 17 At least one of the wings 22, 23 and more particularly 23 comprises, near its pusher 25, a resetting finger 26 which is directed vertically towards the outside of the casing 13.

Le thermostat 1 comporte au-dessus des poussoirs 24, 25 du coulisseau 17 des lames élastiques et métalliques 27, 28 appartenant respectivement aux rupteurs de sécurité 29, 30 du mécanisme de commande 4 du circuit d'alimentation.The thermostat 1 comprises above the pushers 24, 25 of the slide 17 elastic and metal blades 27, 28 respectively belonging to the safety switches 29, 30 of the control mechanism 4 of the power supply circuit.

Chaque rupteur de sécurité 29, 30 est monté sur la phase d'alimentation correspondante en courant électrique de la résistance d'un chauffe eau ou d'un appareil analogue non représenté.Each safety switch 29, 30 is mounted on the corresponding supply phase electrical current of the resistance of a water heater or similar device not shown.

Les extrémités de chaque lame élastique 27,28 portent un contact 31, 32 propres à coopérer avec un contact fixe 33, 34 solidaire respectivement des bornes de connexion 35, 36 du thermostat 1 (figures 4 et 5).The ends of each elastic blade 27, 28 carry a contact 31, 32 adapted to cooperate with a fixed contact 33, 34 integral respectively with the connection terminals 35, 36 of the thermostat 1 ( figures 4 and 5 ).

Le thermostat 1 comporte un levier amplificateur isolant 37 se prolongeant par un doigt isolant 38 propre à coopérer avec un contact mobile et élastique 39 coopérant avec une autre borne de connexion, non représentée, du thermostat 1.The thermostat 1 comprises an insulating amplifier lever 37 extending by an insulating finger 38 adapted to cooperate with a movable and elastic contact 39 cooperating with another connection terminal, not shown, of the thermostat 1.

Le levier amplificateur 37 est traversé par la tige en métal 7 à faible-coefficient de dilatation.The amplifier lever 37 is traversed by the metal rod 7 with a low coefficient of expansion.

On note que le contact mobile et élastique 39 est commandé par le levier amplificateur 37 en fonction de la dilatation relative du tube 5 par rapport à la tige 7 afin d'assurer une ouverture brusque des rupteurs de sécurité 29, 30.Note that the movable and elastic contact 39 is controlled by the amplifier lever 37 as a function of the relative expansion of the tube 5 relative to the rod 7 to ensure a sudden opening of the safety switches 29, 30.

On a montré en figures 8 à 10 un thermostat à régulation unipolaire et à sécurité unipolaire 100 comportant comme décrit précédemment pour le thermostat 1 une sonde 2, un socle 3 en matière plastique sur lequel vient se fixer un boîtier 13 afin de renfermer un mécanisme de commande 4 du circuit d'alimentation d'un système de chauffage d'un chauffe eau électrique.We have shown in Figures 8 to 10 a unipolar and unipolar safety thermostat 100 comprising, as previously described for the thermostat 1, a probe 2, a base 3 made of plastic on which a housing 13 is fixed to enclose a control mechanism 4 of the supply circuit a heating system of an electric water heater.

Le thermostat 100 se distingue de celui décrit précédemment en ce qu'il comporte un seul rupteur de sécurité 29 comprenant une lame élastique et métallique 27 solidaire d'un contact 31 destiné à coopérer avec un contact fixe 33 solidaire d'une borne de connexion du thermostat 100.The thermostat 100 differs from that described above in that it comprises a single safety switch 29 comprising an elastic and metal plate 27 integral with a contact 31 intended to cooperate with a fixed contact 33 integral with a connection terminal of the thermostat 100.

Egalement, le thermostat 100 se distingue de celui décrit précédemment en ce que le dispositif de sécurité est constitué d'un ressort 15 en alliage à mémoire de forme disposé dans un logement 40 ménagé dans le socle 3 en dessous de la lame élastique 27 du rupteur de sécurité 29.Also, the thermostat 100 differs from that described above in that the safety device consists of a spring 15 of shape memory alloy disposed in a housing 40 formed in the base 3 below the elastic blade 27 of the breaker security 29.

Le logement 40 se trouve à proximité immédiate de la sonde 2 de manière que le dispositif de sécurité 15 suive l'évolution de la température de l'eau avec un gradient thermique minimal.The housing 40 is in the immediate vicinity of the probe 2 so that the safety device 15 follows the evolution of the temperature of the water with a minimum thermal gradient.

Le logement 40 est prévu suivant une direction verticale et parallèle à l'alésage 6 dans lequel est assujetti le tube 5 à fort coefficient de dilatation de la sonde 2. Le logement 40 peut éventuellement communiquer avec l'alésage 6.The housing 40 is provided in a vertical direction and parallel to the bore 6 in which the tube 5 is subjected to a high coefficient of expansion of the probe 2. The housing 40 may optionally communicate with the bore 6.

Le dispositif de sécurité du thermostat 100 comporte un coulisseau 41 en matière isolante telle que du plastique qui est guidé dans ses déplacements de va et vient vertical à l'intérieur du socle 3.The safety device of the thermostat 100 comprises a slider 41 of insulating material such as plastic which is guided in its movements back and forth vertically inside the base 3.

Le coulisseau 41 est disposé entre la lame élastique 27 du rupteur électrique 29 et le ressort 15. Le coulisseau 41 comporte dans le prolongement du ressort 15 un poussoir 42 qui vient en contact avec la lame élastique 27.The slider 41 is disposed between the elastic blade 27 of the electric switch 29 and the spring 15. The slider 41 comprises, in the extension of the spring 15, a pusher 42 which comes into contact with the elastic blade 27.

Le coulisseau 41 est solidaire d'une aile 43 s'étendant horizontalement et comportant à son extrémité libre un second poussoir 44 dirigé verticalement afin de coopérer avec un dispositif de réarmement 50.The slider 41 is integral with a wing 43 extending horizontally and having at its free end a second pusher 44 directed vertically in order to cooperate with a rearming device 50.

L'aile horizontale 43 du coulisseau 41 est solidaire suivant une direction verticale et opposée à celle du second poussoir 44 d'un dispositif de retenue qui est constitué d'un bossage 18 présentant sur sa face externe un profil dentelé 19 destiné à coopérer avec un clip élastique 20 solidaire du socle 3 afin de réaliser un dispositif de retenue temporaire du dispositif de sécurité.The horizontal flange 43 of the slider 41 is secured in a vertical direction and opposite to that of the second pusher 44 of a retaining device which consists of a boss 18 having on its outer face a serrated profile 19 intended to cooperate with a elastic clip 20 secured to the base 3 to provide a temporary retention device of the safety device.

Le clip élastique 20 présente une extrémité libre en forme de bec 21 dont le profil est complémentaire à celui dentelé 19 du bossage 18.The elastic clip 20 has a free end shaped spout 21 whose profile is complementary to that serrated 19 of the boss 18.

Le profil dentelé 19 présente un pan inférieur 45 qui est incliné d'un angle α par rapport à un axe vertical xx' parallèle ou confondu à celui du tube 5 à l'intérieur duquel est disposée la tige de métal 7. L'angle d'inclinaison a du pan inférieur 45 est compris entre 25 et 35 degrés (figures 7, 8).The serrated profile 19 has a lower panel 45 which is inclined at an angle α with respect to a vertical axis xx 'parallel to or coincident with that of the tube 5 inside which the metal rod 7 is arranged. inclination of the lower pan 45 is between 25 and 35 degrees ( figures 7 , 8 ).

Le dispositif de retenue permet de bloquer temporairement le coulisseau 41 dans ses déplacements verticaux. En effet, le dispositif de retenue est prévu pour céder sous force prédéterminée et maîtrisée lors de la fabrication du thermostat.The retaining device makes it possible to temporarily block the slide 41 in its vertical displacements. Indeed, the retaining device is provided to yield under predetermined force and controlled during the manufacture of the thermostat.

Le fonctionnement du thermostat 1 à régulation unipolaire et à sécurité bipolaire ou du thermostat 100 à régulation unipolaire et à sécurité unipolaire résulte de la description et des explications qui précèdent au regard des figures 1 à 10.The operation of the thermostat 1 with unipolar and bipolar safety regulation or the thermostat 100 with unipolar regulation and unipolar safety is the result of the description and explanations which precede the Figures 1 to 10 .

Si pour une raison quelconque la température de l'installation vient à s'élever anormalement, en dépassant celle du seuil thermique minimal du ressort 15, ce dernier se dilate pour déplacer verticalement, le coulisseau 17, 41 de chaque thermostat 1, 100.If for any reason the temperature of the installation is raised abnormally, exceeding that of the minimum thermal threshold of the spring 15, the latter expands to move vertically, the slide 17, 41 of each thermostat 1, 100.

En ce qui concerne le thermostat 1, on constate que le ressort 15 assure le déplacement vertical de l'entretoise 16 entraînant dans la même direction le coulisseau 17.With regard to the thermostat 1, it is found that the spring 15 ensures the vertical displacement of the spacer 16 driving in the same direction the slide 17.

On constate que le coulisseau 17, 41 de chaque thermostat 1, 100est bloqué par le dispositif de retenue et plus particulièrement par son bossage 18 dont le profil dentelé 19 coopère avec le bec 21 du clip élastique 20.It can be seen that the slider 17, 41 of each thermostat 1, 100 is blocked by the retaining device and more particularly by its boss 18 whose serrated profile 19 cooperates with the spout 21 of the elastic clip 20.

Le blocage temporaire du coulisseau 17, 41 permet de comprimer le ressort 15 jusqu'à atteindre la force prédéterminée de rupture du clip élastique 20 requise au dégagement dudit coulisseau.The temporary blocking of the slider 17, 41 compresses the spring 15 until it reaches the predetermined breaking force of the elastic clip 20 required to disengage said slider.

La retenue temporaire du coulisseau 17, 41 permet une accumulation d'énergie transformant le mouvement lent de dilatation du ressort 15 en un mouvement d'ouverture brusque d'au moins un des rupteurs de sécurité 29, 30 comportant chacun des lames élastiques 27, 28 solidaires de contacts 31, 32.The temporary retention of the slide 17, 41 allows an accumulation of energy transforming the slow movement of expansion of the spring 15 into a sudden opening movement of at least one of the safety breakers 29, 30 each having resilient blades 27, 28 secured to contacts 31, 32.

En effet, le clip élastique 20 du dispositif de retenue cède sous l'effort du ressort 15 pour créer un mouvement d'ouverture rapide et brusque d'au moins l'un des contacts 31, 32 en fonction des caractéristiques du thermostat 1, 100Indeed, the elastic clip 20 of the retaining device yields under the force of the spring 15 to create a fast and abrupt opening movement of at least one of the contacts 31, 32 according to the characteristics of the thermostat 1, 100

Dans ces conditions, le système de retenue temporaire, constitué par le bossage 18 du coulisseau 17, 41 dont le profil dentelé 19 coopère avec le bec 21 du clip élastique 20, permet de couper franchement l'alimentation électrique du thermostat 1,100 même dans le cas d'une faible inertie thermique.Under these conditions, the temporary retention system, consisting of the boss 18 of the slider 17, 41 whose serrated profile 19 cooperates with the spout 21 of the elastic clip 20, allows to cut frankly the power supply of the thermostat 1,100 even in the case a low thermal inertia.

Egalement, le système de retenue temporaire constitué par le bossage 18 du coulisseau 17, 41 dont le profil dentelé 19 coopère avec le bec 21 du clip élastique 20, permet d'empêcher le ressort 15 de se rétracter sous la pression de la ou les lames élastiques 27, 28 lors de la diminution de la température de l'installation.Also, the temporary retention system consisting of the boss 18 of the slide 17, 41 whose serrated profile 19 cooperates with the spout 21 of the elastic clip 20, prevents the spring 15 from retracting under the pressure of the blade or blades resilient 27, 28 when decreasing the temperature of the installation.

En effet, l'inclinaison du pan inférieur 45 du profil denté 19 sur lequel vient prendre appui la face supérieure du bec 21 du clip élastique 20 permet de retenir et de maintenir la ou les lames élastiques 27, 28 lors de la diminution de la température de l'installation.Indeed, the inclination of the lower pan 45 of the toothed profile 19 on which bears on the upper face of the spout 21 of the elastic clip 20 makes it possible to retain and maintain the elastic blade (s) 27, 28 during the decrease of the temperature of the installation.

Ainsi, le ou les rupteurs de sécurité 29, 30 restent ouvert(s), ce qui oblige l'utilisateur à réarmer manuellement le thermostat 1, 100 en appuyant sur le doigt de réarmement 26, 50 pour contraindre le ressort 15 dans sa position initiale pour permettre à la ou les lames élastiques 27, 28 du ou des rupteurs de sécurité 29, 30 de venir en contact afin d'alimenter à nouveau la résistance de chauffage.Thus, the safety breaker (s) 29, 30 remain open (s), which forces the user to manually reset the thermostat 1, 100 by pressing the resetting finger 26, 50 to force the spring 15 to its initial position. to allow the elastic blade (s) 27, 28 of the safety cut-out (s) 29, 30 to come into contact in order to supply the heating resistor again.

Claims (10)

  1. Probe-type thermostat of the kind comprising, built on a base (3) enclosed by a housing (13), an electromechanical temperature-regulating system consisting of a probe (2) comprising, in a vertical direction XX', a metal tube (5) with a high coefficient of expansion inside which there is positioned a metal rod (7) with a low coefficient of expansion and a safety device (15) which, in the event of a temperature increase that crosses the minimum thermal threshold of the safety device, opens at least one safety breaker switch (29, 30), characterized in that it comprises a temporary-retention device with manual reset comprising a slider (17, 41) provided with a boss (18) which on its external face has a toothed profile (19) intended to engage with an elastic clip (20) secured to the base (3) and having a beaked free end (21) the profile of which complements the toothed profile (19) of the boss (18) so as to convert the slow expansion movement of the safety device (15) into a sudden opening movement of at least one of the safety breaker switches (29, 30) .
  2. Probe-type thermostat according to Claim 1, characterized in that the probe (2) comprises, above where the metal rod (7) is crimped to the tube (5), a peripheral groove (14) that forms an internal stop that retains the safety device (15) that consists of a shape-memory alloy spring inside the tube (5) and between the latter and the metal rod (7).
  3. Probe-type thermostat according to Claim 1, characterized in that the probe (2) comprises a cylindrical spacer piece (16) which is positioned between the tube (5) and the metal rod (7) and one of the ends of which bears against the spring (15) while the other end bears against the slider (17) made of insulating material.
  4. Probe-type thermostat according to Claim 1, characterized in that the slider (17) has at its middle a boss (18) which, on its external face, has a toothed profile (19) intended to collaborate with an elastic clip (20) secured to the base (3) so as to produce the temporary-retention device that temporarily retains said slider.
  5. Probe-type thermostat according to Claim 1, characterized in that the slider (41) comprises a horizontal wing (43) secured to a boss (18) which on its external face has a toothed profile (19) intended to engage with an elastic clip (20) secured to the base (3) so as to produce the temporary-retention device that temporarily retains the said slider.
  6. Probe-type thermostat according to either one of Claims 4 and 5, characterized in that the toothed profile (19) of the boss (18) has a lower surface (45) which is inclined by an angle α of between 25 and 35 degrees with respect to a vertical axis xx'.
  7. Probe-type thermostat according to Claim 1, characterized in that the retaining device is, on the one hand, in contact with at least one of the safety breaker switches (29, 30) and, on the other hand, connected with the safety device (15).
  8. Probe-type thermostat according to Claim 1, characterized in that the slider (17) has, extending from its middle and in diametrically opposite directions, two wings (22, 23) each secured to a pusher (24, 25) extending vertically in planes parallel to the one containing the axis of movement of the slider (17) and, near the pusher (25), a reset finger (26) directed vertically toward the outside of the housing (13).
  9. Probe-type thermostat according to Claim 1, characterized in that the safety device consists of a shape-memory allow spring (15) positioned in a housing (40) formed in the base (3) underneath the elastic blade (27) of the safety breaker switch (29), the said housing (40) lying in immediate proximity to the probe (2) so that the safety device (15) monitors the change in water temperature with a minimal thermal gradient.
  10. Probe-type thermostat according to Claim 1, characterized in that the slider (41) comprises, in the continuation of the spring (15), a pusher (42) which comes into contact with the elastic blade (27) of the breaker switch (29), the said slider (41) being secured to a wing (43) extending horizontally and at its free end having a second pusher (44) directed vertically so as to engage with a reset device (50).
EP05773019A 2004-05-26 2005-05-26 Control thermostat provided with a holding device Not-in-force EP1766647B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0405670A FR2870985B1 (en) 2004-05-26 2004-05-26 REGULATION THERMOSTAT WITH RETENTION DEVICE
PCT/FR2005/001300 WO2005119720A1 (en) 2004-05-26 2005-05-26 Control thermostat provided with a holding device

Publications (2)

Publication Number Publication Date
EP1766647A1 EP1766647A1 (en) 2007-03-28
EP1766647B1 true EP1766647B1 (en) 2008-08-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05773019A Not-in-force EP1766647B1 (en) 2004-05-26 2005-05-26 Control thermostat provided with a holding device

Country Status (5)

Country Link
EP (1) EP1766647B1 (en)
AT (1) ATE405941T1 (en)
DE (1) DE602005009193D1 (en)
FR (1) FR2870985B1 (en)
WO (1) WO2005119720A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2951861B1 (en) * 2009-10-27 2011-11-25 Cotherm Sa HYBRID THERMOSTAT FOR ELECTRIC WATER HEATER
EP4303903A1 (en) 2022-07-04 2024-01-10 Termoregolatori Campini Corel S.p.A. Rod thermostat with safety

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH112032A (en) * 1924-08-29 1925-10-16 Zbinden Emil Contact device on an electrical temperature regulating device.
FR898738A (en) * 1943-06-07 1945-05-04 Electro App Device for controlling electrical contacts by thermo-sensitive elements
FR2734400B1 (en) * 1995-05-19 1997-07-25 Cotherm Sa REGULATION THERMOSTAT COMPRISING A SAFETY DEVICE IN THE PROBE
FR2735278B1 (en) * 1995-06-12 1997-08-29 Cotherm Sa PROBE THERMOSTAT COMPRISING A SHAPE MEMORY ALLOY SPRING IN THE BASE

Also Published As

Publication number Publication date
WO2005119720A1 (en) 2005-12-15
FR2870985A1 (en) 2005-12-02
DE602005009193D1 (en) 2008-10-02
ATE405941T1 (en) 2008-09-15
FR2870985B1 (en) 2007-05-18
EP1766647A1 (en) 2007-03-28

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