EP0128793A1 - Device for connecting a gas-fired condensing water heater to a mechanically controlled ventilation duct - Google Patents

Device for connecting a gas-fired condensing water heater to a mechanically controlled ventilation duct Download PDF

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Publication number
EP0128793A1
EP0128793A1 EP84401005A EP84401005A EP0128793A1 EP 0128793 A1 EP0128793 A1 EP 0128793A1 EP 84401005 A EP84401005 A EP 84401005A EP 84401005 A EP84401005 A EP 84401005A EP 0128793 A1 EP0128793 A1 EP 0128793A1
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EP
European Patent Office
Prior art keywords
combustion products
mouth
appliance
cuff
neck
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.)
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Application number
EP84401005A
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German (de)
French (fr)
Inventor
Jean-Claude Charron
Philippe Milsant
René Granier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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Publication date
Priority claimed from FR8308700A external-priority patent/FR2546609B1/en
Priority claimed from FR8315892A external-priority patent/FR2553176B2/en
Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0128793A1 publication Critical patent/EP0128793A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation

Definitions

  • the invention relates to a device for connecting a condensing gas appliance to a controlled mechanical ventilation duct and more specifically relates to the combination of a device for controlling the rate of discharge of the combustion products outside the with the room ventilation control system.
  • the technical solution generally used for this safety function consists in controlling the overflow of the combustion products which occurs at the level of the additional air inlet of the draft draw of the appliance when the extraction flow at VMC mouth level is insufficient; this overflow is very easy to control using a simple thermal sensor (for example constituted by a bimetallic thermostat) when the device connected to the V.M.C. is a traditional device that does not use the condensation of water vapor contained in the combustion products; and since in this device the combustion products leave the exchanger at a relatively high temperature.
  • a simple thermal sensor for example constituted by a bimetallic thermostat
  • the temperature of the combustion products may at certain times not exceed the temperature of the ambient air normally sucked in by the draft cut-off and it becomes practically impossible to detect the overflow of these combustion products at the draft cut by a simple temperature sensor because the difference to be measured is too small.
  • the safety system detecting the overflow of the combustion products at the draft hood has been replaced by a pressure switch detecting any abnormal drop in vacuum in the VMC duct. It is associated with a conventional modulating mouth fixed on the VMC duct upstream of a sealed box, one side of which carries a collar on which the outlet of the combustion products of the condensing appliance is connected, and of which another side is equipped with '' a relief valve whose opening section is added to that of the flange. Said relief valve opens automatically so as to limit the depression in the box to a very low value compared to the depression which prevails in the VMC duct downstream of the modulating mouth, and this, whatever the setting value of the flow rate performed on the VMC modulating mouth.
  • the new device for connecting a gas condensing appliance to a V.M.C. duct which is the subject of the present invention avoids the drawbacks explained above.
  • the new device for connecting a condensing gas appliance to a VMC duct consists of a combination of two independent devices which make it possible to dissociate, at their level, the function of adjusting the ventilation. room, adjustment and control functions evacuation flow rate of the combustion products from the appliance, which includes safety in the event of this flow being insufficient, the evacuation of condensates being able to form in the two combined devices.
  • connection of the dissociated device ensuring the adjustment and the control of the evacuation rate of the combustion products is taken in bypass on the upstream part of the device ensuring the control of the ventilation air of the room to using a rigid or flexible cuff allowing a free choice of the respective location of the two devices, said cuff fitting, on the one hand,
  • the device which ensures the control of the evacuation flow rate of the combustion products as well as the securing of the apparatus in the event of insufficient or lacking discharge rate is consisting of a body which is characterized, by following the direction of flow from bottom to top of the combustion products, by a converging funnel-shaped inlet followed by a neck of section suitable for the discharge rate to be ensured and d 'A divergent which brings the outlet section to that of the connection sleeve, the control of the discharge rate of the combustion products being ensured by a membrane pressure switch measuring the depression prevailing at the neck of the convergent.
  • this device for controlling the discharge flow rate is fixed to the boiler above and in the vertical axis of the combustion products outlet nozzle so that an annular space is left free between the outlet section of said nozzle and the base of the inlet of the convergent, a drip tray with a diameter slightly greater than the inlet diameter of the convergent being arranged coaxially with the combustion products evacuation nozzle in order to to collect the condensation water which may form in the two devices and their connecting sleeve and discharge it down through the combustion circuit normally designed for this purpose.
  • the first device which regulates the ventilation air flow rate in the room cannot be equipped with a commercial VMC outlet allowing manual modulation of the flow rate between 0 and a preset value
  • the device for controlling the rate of discharge of the burnt gases consists of a venturi, the tubular inlet of which is fitted onto the tube for discharging the combustion products leaving the device and whose outlet is connected to the evacuation cuff to the extraction mouth.
  • the tubular inlet is further provided, upstream of the venturi, with holes for the passage of air.
  • FIG. 1 shows a manifold 1 for evacuating the burnt gases, one open end of which is equipped with a conventional evacuation mouth 2 - provided with its adjustment cone 9 - bringing the inside the collector with local air.
  • the other end of the collector engages in the orifice 3 provided on the wall 7 which puts it in communication with the V.M.C. 6.
  • This end of the manifold is further provided with a small flange 5 intended to prevent the condensation water from entering the V.M.C.
  • a connection flange 8 placed vertically under the collector 1 makes it possible to connect the latter to a flexible or rigid cuff 10, the lower end of which is itself fitted onto the outlet of a convergent-divergent body 11.
  • This body 11 is characterized by a converging inlet 28 in the form of a funnel followed by a neck 30 of smaller section than the cuff 10 and terminated by a divergent 29 which brings the outlet section to that of the cuff.
  • the control of the evacuation flow rate of the combustion products is ensured by a membrane pressure switch 15, a chamber of which is connected to the neck 30 by a vacuum connection pipe 18.
  • the pressure switch 15 is also connected to the electrical supply terminals. 16 of the condensing gas appliance 14.
  • the body 11 previously described is placed above the device and in the vertical axis of the outlet nozzle 13 of the combustion products.
  • An annular space 31 is left free between the outlet section of the nozzle 13 and the base of the converging inlet 28.
  • a drip tray 12 of diameter slightly greater than the diameter of the converging inlet 28 is arranged coaxially with the nozzle evacuation 13 of the combustion products above the air inlet orifice 17 in the appliance 14. This tray collects the condensation water which can form in the converging body 11 as well as in the collector 1 and the connecting sleeve 10 and discharge it down through the combustion circuit normally designed for this purpose.
  • connection sleeve 10 to the exhaust gas collector of the appliance 14 is fitted onto the outlet of a tube 35, the lower part of which is itself engaged in the conduit 13 for discharging the burnt gases.
  • This tube 35 is provided with a neck 30 forming a venturi, at the level of which the vacuum intake duct 18 ends.
  • the tube 35 Upstream of the neck 30, the tube 35 is provided with orifices 36 for the air intake. Upstream of these orifices, the purpose of a converging nozzle 37 is to prevent the discharge of the combustion products.
  • This bu comprises two small perforations 38 for the passage of the condensed water which flows on the wall of the tube 35
  • the adjustment cone 9 is adjusted by the installer according to the dimensions of the room and the desired ventilation.
  • the appliance 14 is operating normally, as well as the evacuation of the combustion products via the VMC duct 6, the depression created in the neck 30 of the body 11 keeps closed, thanks to the small duct 18, the contact of the membrane pressure switch 15 authorizing the operation of the device.
  • the depression attenuates at the neck 30 of the body 11 which causes the contact 15 to open, and the circuit 16 for supplying the appliance to be cut off .
  • FIGS. 2 to 4 shows an additional adjustment device to the conventional extraction mouth 2.
  • a rotating disc 19 on which is attached the conventional extraction mouth 2.
  • the cone 9 provided in the central part is held by a stirrup 32 in the maximum open position for air passage.
  • the disc 19 bearing on a guide disc 33 is provided with two brackets 22 cooperating with driving stops 23 of the movable flaps 20 of a rotary shutter assembly 21, also comprising fixed flaps 24, as seen in the FIG. 4.
  • the rotary shutter 21 is equipped in its center with a conventional spring system 36 for centering and holding the flaps 24 and 34 in position.
  • the rotating disc can be operated by the user using pullers 34 attached to two studs 27 diametrically opposite, on the disc 19.
  • V.M.C. 2 was of the preset fixed rate type.
  • the rotary shutter system 21 makes it possible to manually control the putting into service or out of service of the V.M.C. by the action of the pull tabs 35 on the rotating disc 19.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Chimneys And Flues (AREA)

Abstract

The device for connecting a gas-fired condensing water heater (14) to a mechanically controlled ventilation (M.C.V.) duct (6) consists of a combination of two devices, one for the adjustment of the ventilation of the room, which is ensured by an air extraction opening (2) mounted on a collector (1), itself connected to the M.C.V. duct (6), the other for the control of the rate of evacuation of the combustion products by virtue of a converging member (11) mounted above the heater (14), the neck (30) of which is connected to a pressure switch (15) which responds to variations in pressure in the direction of the cutoff of the electric supply (16). Application in condensing water heaters connected to an M.C.V. duct. <IMAGE>

Description

L'invention se rapporte a un dispositif de raccordement d'un appareil à gaz à condensation sur un conduit de ventilation mécanique contrôlée et concerne plus précisément l'association d'un dispositif de contrôle du débit d'évacuation des produits de combustion hors de l'appareil avec le système de réglage de la ventilation du local.The invention relates to a device for connecting a condensing gas appliance to a controlled mechanical ventilation duct and more specifically relates to the combination of a device for controlling the rate of discharge of the combustion products outside the with the room ventilation control system.

On sait que le raccordement d'un appareil d'utilisation du gaz du type chauffe-eau ou chaudière à condensation sur un conduit de ventilation mécanique contrôlée dit V.M.C. pose un certain nombre de problèmes techniques mal résolus actuellement. Plusieurs causes sont a l'origine de ces problèmes :

  • - D'abord l'apparition de nouvelles réglementations qui tendent vers une diminution des débits de renouvellement d'air des logements, dans le but de réduire les déperditions calorifiques représentées par le réchauffement du volume d'air renouvelé ; dans le même temps, ces mêmes réglementations introduisent une nouvelle notion qui est la possibilité de pouvoir moduler le débit de ventilation entre deux limites fixées en fonction des caractéristiques du logement.
  • - Puis l'apparition des appareils à gaz dits à condensation dont le rendement nettement plus élevé signifie un abaissement très important de la température moyenne des produits de combustion évacués par ces appareils. Du fait de la relativement basse température des produits de combustion à évacuer, il y a formation de condensat sur toutes les parois froides des dispositifs de raccordement au conduit VMC et des dispositions nouvelles doivent être imaginées et réalisées pour assurer l'évacuation de ces condensats.
It is known that the connection of a gas utilization device of the water heater or condensing boiler type to a controlled mechanical ventilation duct known as VMC poses a number of technical problems which are currently poorly resolved. Several causes are behind these problems:
  • - Firstly, the appearance of new regulations which tend towards a reduction in the air renewal rates of the dwellings, with the aim of reducing the heat losses represented by the heating of the volume of air renewed; at the same time, these same regulations introduce a new concept which is the possibility of being able to modulate the ventilation rate between two limits fixed according to the characteristics of the dwelling.
  • - Then the appearance of so-called condensing gas appliances, whose significantly higher efficiency means a very significant reduction in the average temperature of the combustion products evacuated by these appliances. Due to the relatively low temperature of the combustion products to be evacuated, there is formation of condensate on all the cold walls of the devices for connection to the VMC duct and new arrangements must be devised and implemented to ensure the evacuation of these condensates.

Cette dernière cause se rapportant à l'abaissement important des produits de combustion a une incidence sur les solutions techniques qui doivent être utilisées pour la réalisation du dispositif de sécurité qui doit comme on sait entraîner l'arrêt de l'appareil en cas d'insuffisance du débit de ventilation dû par exemple à une panne ou même une baisse de régime du ventilateur de l'installation V.M.C.This last cause relating to the significant lowering of the combustion products has an impact on the technical solutions which must be used for the realization of the safety device which must as we know entail shutting down the appliance in the event of insufficiency ventilation flow rate due for example to a breakdown or even a drop in speed of the fan of the VMC installation

En effet, la solution technique généralement utilisée pour cette fonction de sécurité, consiste à contrôler le débordement des produits de combustion qui se produit au niveau de l'entrée d'air additionnel du coupe tirage de l'appareil lorsque le débit d'extraction au niveau de la bouche V.M.C. est insuffisant ; ce débordement est très facile à contrôler à l'aide d'un capteur thermique simple(par exemple constitué par un thermostat à bilame) lorsque l'appareil raccordé à la V.M.C. est un appareil traditionnel ne mettant pas en oeuvre la condensation de la vapeur d'eau contenue dans les produits de combustion ; et puisque dans cet appareil les produits de combustion sortent de l'échangeur à température relativement élevée.Indeed, the technical solution generally used for this safety function, consists in controlling the overflow of the combustion products which occurs at the level of the additional air inlet of the draft draw of the appliance when the extraction flow at VMC mouth level is insufficient; this overflow is very easy to control using a simple thermal sensor (for example constituted by a bimetallic thermostat) when the device connected to the V.M.C. is a traditional device that does not use the condensation of water vapor contained in the combustion products; and since in this device the combustion products leave the exchanger at a relatively high temperature.

Par contre, lorsqu'il s'agit d'un appareil à condensation, la température des produits de combustion peut à certains moments ne pas dépasser la température de l'air ambiant aspiré normalement par le coupe tirage et il devient pratiquement impossible de déceler le débordement de ces produits de combustion au niveau du coupe tirage par un simple capteur de température car l'écart à mesurer est trop faible.On the other hand, in the case of a condensing appliance, the temperature of the combustion products may at certain times not exceed the temperature of the ambient air normally sucked in by the draft cut-off and it becomes practically impossible to detect the overflow of these combustion products at the draft cut by a simple temperature sensor because the difference to be measured is too small.

En outre pratiquement tous les appareils à gaz à condensation utilisent un ventilateur électrique pour assurer l'alimentation en air de combustion car cette alimentation ne saurait être réalisée par simple tirage thermique en raison des pertes de charge très élevées des échangeurs à haut rendement nécessaires à la condensation et, sur ces appareils, le coupe tirage, qui n'a plus sa raison d'être, est généralement supprimé.In addition, practically all condensing gas appliances use an electric fan to supply combustion air because this supply cannot be achieved by simple thermal draft due to the very high pressure drops of the high-efficiency exchangers necessary for the condensation and, on these devices, the draft hood, which no longer has its raison d'être, is generally eliminated.

Une autre difficulté apparaît également lorsqu'on doit raccorder un appareil à condendation sur un conduit V.M.C. prévoyant la modulation du débit d'extraction entre deux limites assez éloignées ; en effet pour obtenir les hauts rendements des appareils à condensation, la combustion du gaz se fait avec un taux d'excès d'air aussi faible que possible, c'est-à-dire juste nécessaire à la combustion complète du gaz, ce qui veut dire que le débit d'air passant dans l'appareil doit à tout moment être respecté de façon assez précise car une augmentation du débit d'air fait rapidement perdre sur le rendement et une diminution entraine immédiatement une mauvaise combustion. Or, comme on désire pouvoir moduler le débit d'air d'extraction entre deux valeurs très éloignées (par exemple entre 20 et 75 m3/h dans le cas d'une cuisine de studio) il faudra faire en sorte que cette variation soit sans influence sensible sur le débit d'air de combustion traversant l'appareil.Another difficulty also appears when it is necessary to connect a condensing device to a VMC conduit providing for the modulation of the extraction flow rate between two fairly distant limits; indeed to obtain the high yields of condensing appliances, the combustion of the gas is done with a rate of excess air as low as possible, that is to say just necessary for the complete combustion of the gas, which means that the air flow rate passing through the appliance must be respected fairly precisely at all times because an increase in the air flow quickly causes a loss in efficiency and a reduction immediately causes poor combustion. However, as we wish to be able to modulate the extraction air flow between two very distant values (for example between 20 and 75 m 3 / h in the case of a studio kitchen) it will be necessary to ensure that this variation is without appreciable influence on the flow of combustion air passing through the appliance.

Connaissant ces problèmes on a déjà imaginé différentes façons de les résoudre. En particulier, dans certains dispositifs on a remplacé le système de sécurité détectant le débordement des produits de combustion au coupe-tirage par un manocontact détectant toute baisse anormale de la dépression dans le conduit VMC. On lui associe une bouche modulante classique fixée sur le conduit VMC en amont d'une boite étanche dont une face porte une collerette sur laquelle on raccorde la sortie des produits de combustion de l'appareil à condensation, et dont une autre face est équipée d'un clapet de décharge dont la section d'ouverture vient s'ajouter à celle de la collerette. Ledit clapet de décharge s'ouvre automatiquement de manière à limiter la dépression dans la boite à une valeur très faible comparativement à la dépression qui règne dans le conduit VMC en aval de la bouche modulante, et cela, quelle que soit la valeur de réglage du débit effectué sur la bouche modulante VMC.Knowing these problems, we have already imagined different ways to solve them. In particular, in certain devices, the safety system detecting the overflow of the combustion products at the draft hood has been replaced by a pressure switch detecting any abnormal drop in vacuum in the VMC duct. It is associated with a conventional modulating mouth fixed on the VMC duct upstream of a sealed box, one side of which carries a collar on which the outlet of the combustion products of the condensing appliance is connected, and of which another side is equipped with '' a relief valve whose opening section is added to that of the flange. Said relief valve opens automatically so as to limit the depression in the box to a very low value compared to the depression which prevails in the VMC duct downstream of the modulating mouth, and this, whatever the setting value of the flow rate performed on the VMC modulating mouth.

Ces dispositifs présentent dans leur conception certains inconvénients. En particulier, un inconvénient résulte du fait que le contrôle du débit aspiré par le conduit V.M.C. à travers la bouche modulante est obtenu indirectement par le contrôle de la dépression qui règne dans le conduit d'aspiration du conduit V.M.C. en amont du dispositif. Par conséquent si à la longue il y a encrassement de la bouche modulante, il y a diminution progressive du débit aspiré sans qu'il y ait, à aucun moment, possibilité de détecter cette diminution de débit.These devices have certain drawbacks in their design. In particular, a drawback results from the fact that the control of the flow aspirated by the VMC conduit through the modulating mouth is obtained indirectly by control of the vacuum prevailing in the suction duct of the VMC duct upstream of the device. Consequently, if in the long term there is fouling of the modulating mouth, there is a progressive reduction in the suction flow rate without there being, at any time, the possibility of detecting this reduction in flow rate.

En outre, en cas d'incident pouvant résulter d'une non détection d'un manque de débit d'extraction à travers le dispositif, le partage ou l'attribution des responsabilités entre l'installateur du dispositif de raccordement V.M.C. et le fabricant de l'appareil à gaz est presque impossible à établir, car le débit d'extraction des produits de combustion à travers l'appareil à gaz va dépendre non seulement du réglage du débit minimum de la bouche modulante, qui peut par suite d'encrassement se réduire dans le temps, mais va dépendre également de la dépression très faible qui règne dans le bottier du dispositif en aval du raccordement de la buse d'évacuation des produits de combustion de l'appareil à gaz ainsi que la perte de charge propre à ce raccordement. Egalement, lorsque la bouche modulante est réglée à son débit maximum il y a risque d'apparition d'un balayage d'air permanent à travers l'échangeur de l'appareil et d'une baisse de rendement d'exploitation ou obligation de munir l'appareil à gaz d'un coupe tirage très largement dimensionné d'où un coût et un encombrement supplémentaire.In addition, in the event of an incident that may result from a failure to detect a lack of extraction flow through the device, the sharing or allocation of responsibilities between the installer of the V.M.C. and the manufacturer of the gas appliance is almost impossible to establish, since the rate of extraction of the products of combustion through the gas appliance will depend not only on the adjustment of the minimum flow rate of the modulating mouth, which can consequently fouling will reduce over time, but will also depend on the very low vacuum prevailing in the housing of the device downstream of the connection of the combustion product discharge nozzle of the gas appliance as well as the loss of load specific to this connection. Also, when the modulating mouth is set to its maximum flow rate, there is a risk of a permanent air sweeping through the exchanger of the device and a decrease in operating efficiency or obligation to provide the gas appliance with a very broadly dimensioned draft cut, resulting in additional cost and bulk.

Le nouveau dispositif de raccordement d'un appareil gaz à condensation à un conduit V.M.C., objet de la présente invention évite les inconvénients exposés ci-avant.The new device for connecting a gas condensing appliance to a V.M.C. duct, which is the subject of the present invention avoids the drawbacks explained above.

Suivant une caractéristique principale de l'invention, le nouveau dispositif de raccordement d'un appareil à gaz à condensation sur un conduit V.M.C. consiste en une combinaison de deux dispositifs indépendants qui permettent de dissocier, à leur niveau, la fonction de réglage de la ventilation du local, des fonction de réglage et de contrôle du débit d'évacuation des produits de combustion de l'appareil, ce qui inclue la sécurité en cas d'insuffisance de ce débit, l'évacuation des condensats pouvant se former dans les deux dispositifs combinés.According to a main characteristic of the invention, the new device for connecting a condensing gas appliance to a VMC duct consists of a combination of two independent devices which make it possible to dissociate, at their level, the function of adjusting the ventilation. room, adjustment and control functions evacuation flow rate of the combustion products from the appliance, which includes safety in the event of this flow being insufficient, the evacuation of condensates being able to form in the two combined devices.

Ces deux dispositifs combinés sont tous les deux raccordés par leur côté aval par rapport au sens d'écoulement des produits de combustion sur le conduit d'aspiration V.M.C. c'est-à-dire connectés tous les deux sur la dépression régnant dans le conduit V.M.C.These two combined devices are both connected by their downstream side with respect to the direction of flow of the combustion products on the V.M.C. that is to say both connected to the vacuum prevailing in the V.M.C.

Suivant une autre caractéristique de la présente invention le raccordement du dispositif dissocié assurant le réglage et le contrôle du débit d'évacuation des produits de combustion est pris en dérivation sur la partie amont du dispositif assurant le contrôle de l'air de ventilation du local à l'aide d'une manchette rigide ou souple permettant un libre choix de l'emplacement respectif des deux dispositifs, ladite manchette venant s'emboîter, d'une part,According to another characteristic of the present invention, the connection of the dissociated device ensuring the adjustment and the control of the evacuation rate of the combustion products is taken in bypass on the upstream part of the device ensuring the control of the ventilation air of the room to using a rigid or flexible cuff allowing a free choice of the respective location of the two devices, said cuff fitting, on the one hand,

sur une collerette verticale de dérivation placée sous la partie amont du dispositif de réglage d'air de ventilation du local et, d'autre part, sur une collerette verticale placée sur le dessus de la partie aval du dispositif de contrôle du débit d'évacuation des produits de combustion de l'appareil.on a vertical bypass flange placed under the upstream part of the room ventilation air adjustment device and, on the other hand, on a vertical flange placed on top of the downstream part of the exhaust flow control device combustion products from the appliance.

Suivant également une autre caractéristique de l'invention, le dispositif qui assure le contrôle du débit d'évacuation des produits de combustion ainsi que la mise en sécurité de l'appareil en cas d'insuffisance ou de manque de débit d'écavuation, est constitué par un corps qui est caractérisé, en suivant le sens d'écoulement de bas en haut des produits de combustion, par une entrée convergente en forme d'entonnoir suivie d'un col de section appropriée au débit d'évacuation à assurer et d'un divergent qui ramène la section de sortie a celle de la manchette de raccordement, le contrôle du débit d'évacuation des produits de combustion étant assuré par un manocontact à membrane mesurant 1a dépression régnant au col du convergent.According to another characteristic of the invention, the device which ensures the control of the evacuation flow rate of the combustion products as well as the securing of the apparatus in the event of insufficient or lacking discharge rate, is consisting of a body which is characterized, by following the direction of flow from bottom to top of the combustion products, by a converging funnel-shaped inlet followed by a neck of section suitable for the discharge rate to be ensured and d 'A divergent which brings the outlet section to that of the connection sleeve, the control of the discharge rate of the combustion products being ensured by a membrane pressure switch measuring the depression prevailing at the neck of the convergent.

Suivant une autre caractéristique complémentaire de l'invention ce dispositif de contrôle du débit d'évacuation est fixé sur la chaudière au-dessus et dans l'axe vertical de la buse de sortie des produits de combustion de manière telle qu'un espace annulaire soit laissé libre entre la section de sortie de ladite buse et la base de l'entrée du convergent, un plateau récolte-gouttes de diamètre légèrement supérieur au diamètre d'entrée du convergent étant disposé coaxialement à la buse d'évacuation des produits de combustion afin de recueillir l'eau de condensation pouvant se former dans les deux dispositifs et leur manchette de liaison et l'évacuer vers le bas à travers le circuit de combustion conçu normalement à cet effet.According to another additional characteristic of the invention, this device for controlling the discharge flow rate is fixed to the boiler above and in the vertical axis of the combustion products outlet nozzle so that an annular space is left free between the outlet section of said nozzle and the base of the inlet of the convergent, a drip tray with a diameter slightly greater than the inlet diameter of the convergent being arranged coaxially with the combustion products evacuation nozzle in order to to collect the condensation water which may form in the two devices and their connecting sleeve and discharge it down through the combustion circuit normally designed for this purpose.

Suivant une autre caractéristique de l'invention, si le premier dispositif qui assure le réglage du débit d'air de ventilation du local ne peut être équipé d'une bouche V.M.C. du commerce permettant une modulation manuelle du débit entre 0 et une valeur préréglée, on prévoit de dispo- ser dans ce premier dispositif, en amont de la dérivation du raccordement vers le deuxième dispositif, un registre ou un obturateur rotatif qui permettra de commander manuellement la mise "en" ou "hors" service de la bouche V.M.C. du commerce qui sera alors du type préréglée pour un débit fixe, des moyens étant prévus pour que l'ouverture ou la fermeture de l'obturateur rotatif se fasse par rotation manuelle de la collerette extérieure recevant par embolte- ment la bouche V.M.C. à réglage fixe du commerce.According to another characteristic of the invention, if the first device which regulates the ventilation air flow rate in the room cannot be equipped with a commercial VMC outlet allowing manual modulation of the flow rate between 0 and a preset value, provision is made to have in this first device, upstream of the branching of the connection to the second device, a register or a rotary shutter which will allow manual control of the setting "in" or "out" of the VMC mouth of the trade which will then be of the preset type for a fixed flow, means being provided so that the opening or closing of the rotary shutter is done by manual rotation of the external collar receiving by embolement the VMC mouth with fixed adjustment of the trade.

Selon enfin une variante de l'invention, le dispositif de contrôle du débit d'évacuation des gaz brûlés est constitué d'un venturi dont l'entrée tubulaire vient s'emmancher sur le tube d'évacuation des produits de combustion sortant de l'appareil et dont la sortie est reliée à la manchette-d'évacuation vers la bouche d'extraction. L'entrée tubulaire est en outre munie, en amont du venturi, d'orifices pour le passage d'air.Finally, according to a variant of the invention, the device for controlling the rate of discharge of the burnt gases consists of a venturi, the tubular inlet of which is fitted onto the tube for discharging the combustion products leaving the device and whose outlet is connected to the evacuation cuff to the extraction mouth. The tubular inlet is further provided, upstream of the venturi, with holes for the passage of air.

Les avantages de l'invention ressortiront de la description ,qui va suivre d'exemples de réalisations en référence aux dessins annexés qui représentent :

  • - figure 1 : une vue schématique en coupe du dispositif de reccordement,
  • - figure 2 : une vue partielle en coupe d'une variante de réalisation du dispositif de réglage du débit d'air de ventilation du local,
  • - figure 3 : une vue de face du dispositif selon AA' de la figure 2,
  • - figure 4 : une vue en coupe selon BB' de la figure 2.
  • - figure 5 : une vue partielle en coupe d'une variante du dispositif de raccordement.
The advantages of the invention will emerge from the description, which will follow from examples of embodiments with reference to the appended drawings which represent:
  • - Figure 1: a schematic sectional view of the reccording device,
  • FIG. 2: a partial sectional view of an alternative embodiment of the device for adjusting the ventilation air flow rate in the room,
  • FIG. 3: a front view of the device along AA ′ in FIG. 2,
  • - Figure 4: a sectional view along BB 'of Figure 2.
  • - Figure 5: a partial sectional view of a variant of the connection device.

On se réfère d'abord à la figure 1 qui montre un collecteur 1 d'évacuation des gaz brûlés dont une extrémité ouverte est équipée d'une bouche d'évacuation classique 2 -munie de son cône de réglage 9- mettant en communication l'intérieur du collecteur avec l'air du local. L'autre extrémité du collecteur s'engage dans l'orifice 3 prévu sur le mur 7 qui le met en communication avec le conduit V.M.C. 6. Cette extrémité du collecteur est en outre munie d'un petit rebord 5 ayant pour objet d'empêcher l'eau de condensation de pénétrer dans le conduit V.M.C. Une collerette de raccordement 8 placée verticalement sous le collecteur 1 permet de relier ce dernier à une manchette souple ou rigide 10 dont l'extrémité inférieure est elle-même emboîtée sur la sortie d'un corps convergent-divergent 11. Ce corps 11 est caractérisé par une entrée convergente 28 en forme d'entonnoir suivi d'un col 30 de plus faible section que la manchette 10 et terminé par un divergent 29 qui ramène la section de sortie à celle de la manchette. Le contrôle du débit d'évacuation des produits de combustion est assuré par un mano-contact à membrane 15 dont une chambre est raccordée au col 30 par un conduit de prise de dépression 18. Le manocontact 15 est également relié aux bornes d'alimentation électrique 16 de l'appareil à gaz à condensation 14.Reference is first made to FIG. 1 which shows a manifold 1 for evacuating the burnt gases, one open end of which is equipped with a conventional evacuation mouth 2 - provided with its adjustment cone 9 - bringing the inside the collector with local air. The other end of the collector engages in the orifice 3 provided on the wall 7 which puts it in communication with the V.M.C. 6. This end of the manifold is further provided with a small flange 5 intended to prevent the condensation water from entering the V.M.C. A connection flange 8 placed vertically under the collector 1 makes it possible to connect the latter to a flexible or rigid cuff 10, the lower end of which is itself fitted onto the outlet of a convergent-divergent body 11. This body 11 is characterized by a converging inlet 28 in the form of a funnel followed by a neck 30 of smaller section than the cuff 10 and terminated by a divergent 29 which brings the outlet section to that of the cuff. The control of the evacuation flow rate of the combustion products is ensured by a membrane pressure switch 15, a chamber of which is connected to the neck 30 by a vacuum connection pipe 18. The pressure switch 15 is also connected to the electrical supply terminals. 16 of the condensing gas appliance 14.

Le corps 11 précédemment décrit est placé au-dessus de l'appareil et dans l'axe vertical de la buse de sortie 13 des produits de combustion. Un espace annulaire 31 est laissé libre entre la section de sortie de la buse 13 et la base de l'entrée convergente 28. Un plateau récolte-gouttes 12 de diamètre légèrement supérieur au diamètre de l'entrée convergente 28 est disposé coaxialement à la buse d'évacuation 13 des produits de combustion au-dessus de l'orifice d'entrée d'air 17 dans l'appareil 14. Ce plateau recueille l'eau de condensation pouvant se former dans le corps convergent 11 ainsi que dans le collecteur 1 et la manchette de liaison 10 et l'évacuer vers le bas à travers le circuit de combustion conçu normalement à cet effet.The body 11 previously described is placed above the device and in the vertical axis of the outlet nozzle 13 of the combustion products. An annular space 31 is left free between the outlet section of the nozzle 13 and the base of the converging inlet 28. A drip tray 12 of diameter slightly greater than the diameter of the converging inlet 28 is arranged coaxially with the nozzle evacuation 13 of the combustion products above the air inlet orifice 17 in the appliance 14. This tray collects the condensation water which can form in the converging body 11 as well as in the collector 1 and the connecting sleeve 10 and discharge it down through the combustion circuit normally designed for this purpose.

Selon la variante de réalisation illustrée à la figure 5, la manchette de raccordement 10 au collecteur d'évacuation des gaz brûlés de l'appareil 14 est emboîtée sur la sortie d'un tube 35 dont la partie inférieure est elle-même engagée dans le conduit 13 d'évacuation des gaz brûlés.According to the variant embodiment illustrated in FIG. 5, the connection sleeve 10 to the exhaust gas collector of the appliance 14 is fitted onto the outlet of a tube 35, the lower part of which is itself engaged in the conduit 13 for discharging the burnt gases.

Ce tube 35 est muni d'un col 30 formant venturi, au niveau duquel aboutit le conduit de prise de dépression 18 .This tube 35 is provided with a neck 30 forming a venturi, at the level of which the vacuum intake duct 18 ends.

En amont du col 30, le tube 35 est muni d'orifices 36 pour l'entrée d'air. En amont de ces orifices, une buse convergente 37 a pour but d'éviter le refoulement des produits de combustion. Cette bu comporte deux petites perforations 38 pour le passage de l'eau de condensation qui ruisselle sur la paroi du tube 35Upstream of the neck 30, the tube 35 is provided with orifices 36 for the air intake. Upstream of these orifices, the purpose of a converging nozzle 37 is to prevent the discharge of the combustion products. This bu comprises two small perforations 38 for the passage of the condensed water which flows on the wall of the tube 35

On voit à la figure 1 que le cône de réglage 9 est réglé par l'installateur en fonction des dimensions du local et de l'aération recherchée. Quand l'appareil 14 fonctionne normalement, ainsi que l'évacuation des produits de combustion par le conduit V.M.C. 6, la dépression crééeau col 30 du corps 11 maintient fermé grâce au petit conduit 18, le contact du manocontact à membrane 15 autorisant le fonctionnement de l'appareil. Par contre dès qu'il y a une anomalie au niveau de l'extraction V.M.C., qui se répercute par une diminution de la vitesse d'évacuation des produits de combustion par la manchette 10, la dépression s'atténue au col 30 du corps 11 ce qui entraine l'ouverture du contact 15, et la coupure du circuit 16 d'alimentation de l'appareil.We see in Figure 1 that the adjustment cone 9 is adjusted by the installer according to the dimensions of the room and the desired ventilation. When the appliance 14 is operating normally, as well as the evacuation of the combustion products via the VMC duct 6, the depression created in the neck 30 of the body 11 keeps closed, thanks to the small duct 18, the contact of the membrane pressure switch 15 authorizing the operation of the device. On the other hand, as soon as there is an anomaly in the VMC extraction, which is reflected by a reduction in the speed of evacuation of the combustion products through the cuff 10, the depression attenuates at the neck 30 of the body 11 which causes the contact 15 to open, and the circuit 16 for supplying the appliance to be cut off .

La variante de réalisation illustrée aux figures 2 à 4 montre un dispositif de réglage additionnel à la bouche d'extraction classique 2. A l'extrémité du collecteur 1 d'évacuation des gaz brûlés, du côté de l'intérieur du local est monté un disque tournant 19 sur lequel est rapportée la bouche d'extraction classique 2. Le cône 9 prévu à la partie centrale est maintenu par un étrier 32 en position d'ouverture maxima de passage d'air. Le disque 19 en appui sur un disque de guidage 33 est muni de deux potences 22 coopérant avec des butées d'entrainement 23 des volets mobiles 20 d'un ensemble obturateur rotatif 21, comprenant aussi des volets fixes 24, comme on le voit à la figure 4. L'obturateur rotatif 21 est équipé en son centre d'un système classique à ressort 36 pour le centrage et le maintien en position des volets 24 et 34.The variant embodiment illustrated in FIGS. 2 to 4 shows an additional adjustment device to the conventional extraction mouth 2. At the end of the manifold 1 for evacuating the burnt gases, on the interior side of the room is mounted a rotating disc 19 on which is attached the conventional extraction mouth 2. The cone 9 provided in the central part is held by a stirrup 32 in the maximum open position for air passage. The disc 19 bearing on a guide disc 33 is provided with two brackets 22 cooperating with driving stops 23 of the movable flaps 20 of a rotary shutter assembly 21, also comprising fixed flaps 24, as seen in the FIG. 4. The rotary shutter 21 is equipped in its center with a conventional spring system 36 for centering and holding the flaps 24 and 34 in position.

On voit à la figure 3 que le disque tournant peut être manoeuvré par l'utilisateur à l'aide de tirettes 34 accrochées à deux plots 27 diamétralement opposés, sur le disque 19.It can be seen in FIG. 3 that the rotating disc can be operated by the user using pullers 34 attached to two studs 27 diametrically opposite, on the disc 19.

On a indiqué précédemment que la bouche V.M.C. 2 était du type préréglé a débit fixe. Le système à obturateur rotatif 21 permet de commander manuellement la mise "en service" ou "hors service" de la bouche V.M.C. par l'action des tirettes 35 sur le disque tournant 19.It was previously indicated that the V.M.C. 2 was of the preset fixed rate type. The rotary shutter system 21 makes it possible to manually control the putting into service or out of service of the V.M.C. by the action of the pull tabs 35 on the rotating disc 19.

Ceci est intéressant particulièrement quand on veut pouvoir moduler le débit d'extraction entre deux valeurs très éloignées par exemple entre 20 et 75 m3/h dans le cas d'une cuisine de studio.This is particularly interesting when you want to be able to modulate the extraction rate between two very distant values, for example between 20 and 75 m 3 / h in the case of a studio kitchen.

Claims (8)

1°/ Dispositif de raccordement d'un appareil a gaz à condensation sur un conduit de ventilation mécanique contrôlée V.M.C. utilisant une bouche d'extrac--tion d'air montée sur un orifice du conduit V.M.C. caractérisé par le fait que dans un collecteur (1) intercalé entre l'orifice(3)du conduit V M C et la bouche (2) aboutit une manchette (10) d'évacuation des produits de combustion de l'appareil et que sur cette manchette est monté à proximité de l'appareil un dispositif -indépendant du dispositif de réglage de ventilation assuré par la bouche -qui permet d'assurer le réglage et le contrôle du débit d'évacuation des produits de combustion, ainsi que la sécurité en cas d'insuffisance de ce débit.1 ° / Device for connecting a condensing gas appliance to a mechanical ventilation duct controlled by V.M.C. using an air extraction outlet mounted on an orifice of the V.M.C. characterized in that in a manifold (1) interposed between the orifice (3) of the VMC duct and the mouth (2) terminates a cuff (10) for evacuating combustion products from the appliance and that on this cuff is mounted near the appliance a device -independent from the ventilation adjustment device provided by the mouth -which makes it possible to ensure the adjustment and control of the discharge rate of combustion products, as well as safety in the event of 'insufficient flow. 2°/ Dispositif de raccordement selon la revendication 1 caractérisé par le fait que le dispositif qui assure le réglage et le contrôle du débit d'évacuation des produits de combustion ainsi que la sécurité en cas d'insuffisance de ce débit est constitué,-par un corps (11) ayant une entrée convergente (28) en forme d'entonnoir suivi d'un col (30) de plus faible section que la manchette (10) et terminé par un divergent (29) en amont de ladite manchette, et par un manocontact (15) réagissant grâce au conduit (18) aux variations de dépression au niveau du col.2 ° / connection device according to claim 1 characterized in that the device which provides adjustment and control of the discharge rate of the combustion products as well as security in the event of insufficient flow is constituted, -by a body (11) having a converging inlet (28) in the form of a funnel followed by a neck (30) of smaller cross section than the cuff (10) and terminated by a diverging portion (29) upstream of said cuff, and by a pressure switch (15) reacting through the conduit (18) to variations in depression at the neck. 3°/ Dispositif de raccordement selon la revendication 1 caractérisé par le fait que le dispositif qui assure le réglage et le contrôle du débit d'évacuation des produits de combustion ainsi que la sécurité en cas d'insuffisance de ce débit est constitué d'un tube (35) emmanché d'un côté sur la manchette (10) de raccordement à la bouche d'extraction et d'un autre côté sur la conduite (13) de sortie des gaz brûlés de l'appareil, lequel tube étant muni d'un col (30) de plus faible section, étant pourvu d'orifices (36) d'entrée d'air en amont de ce col et renfermant au niveau de ces orifices une buse convergente (37).3 ° / Connection device according to claim 1 characterized in that the device which provides adjustment and control of the discharge rate of the combustion products as well as security in the event of insufficient flow consists of a tube (35) fitted on one side to the cuff (10) for connection to the extraction mouth and on the other side to the pipe (13) for the discharge of burnt gases from the appliance, which tube being provided with 'A neck (30) of smaller cross section, being provided with air inlet openings (36) upstream of this neck and containing at these openings a converging nozzle (37). 4°/ Dispositif de raccordement selon les revendications 1 et 2 caractérisé par le fait que la manchette (10) d'évacuation des produits de combustion s'emboîte d'un côté sur une collerette de raccordement (8) placée verticalement sous le collecteur (1) en aval de la bouche d'extraction (2) et de l'autre côté sur le divergent (29) du dispositif de contrôle du débit d'évacuation des produits de combustion de l'appareil (14).4 ° / connection device according to claims 1 and 2 characterized in that the sleeve (10) for evacuation of the combustion products fits on one side on a connection flange (8) placed vertically under the collector ( 1) downstream of the extraction mouth (2) and on the other side on the diverging part (29) of the device for controlling the rate of evacuation of the combustion products from the appliance (14). 5°/ Dispositif de raccordement selon la revendication 2 caractérisé par le fait que le corps (11) est maintenu au-dessus de l'appareil (14) dans l'axe de la buse (13) de sortie des produits de combustion, et qu'il laisse un espace annulaire libre (31) entre la section de sortie de ladite buse et la base de l'entrée convergente (28).5 ° / connecting device according to claim 2 characterized in that the body (11) is held above the device (14) in the axis of the nozzle (13) for the outlet of the combustion products, and that it leaves a free annular space (31) between the outlet section of said nozzle and the base of the converging inlet (28). 6°/ Dispositif de raccordement selon les revendications 2 et 5 caractérisé par le fait qu'un plateau récolte-gouttes (12) de diamètre légèrement supérieur au diamètre de l'entrée convergente (28) est disposé coaxialement à la buse (13) de sortie des produits de combustion.6 ° / Connection device according to claims 2 and 5 characterized in that a drip tray (12) of diameter slightly greater than the diameter of the converging inlet (28) is arranged coaxially with the nozzle (13) of exit of combustion products. 7°/ Dispositif de raccordement selon la revendication 1 caractérisé par le fait qu'on associe au dispositif de réglage de ventilation assuré par la bouche un obturateur rotatif (21) manoeuvrable manuellement qui permet la mise "hors service" ou "en service" de ladite bouche alors préréglée pour un débit fixe.7 ° / Connection device according to claim 1 characterized in that associated with the ventilation adjustment device provided by the mouth a rotary shutter (21) manually operable which allows the setting "out of service" or "in service" said mouth then preset for a fixed flow. 8°/ Dispositif de raccordement selon la revendication 7 caractérisé par le fait qu'un disque tournant (19) sur lequel est rapportée la bouche d'extraction classique (2) est monté à l'extérieur du collecteur (1) et est rattaché par des potences (22) au volets mobiles (20) de l'obturateur rotatif (21).8 ° / Connection device according to claim 7 characterized in that a rotating disc (19) on which is attached the conventional extraction mouth (2) is mounted outside the collector (1) and is attached by brackets (22) to the movable flaps (20) of the rotary shutter (21).
EP84401005A 1983-05-26 1984-05-17 Device for connecting a gas-fired condensing water heater to a mechanically controlled ventilation duct Withdrawn EP0128793A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8308700 1983-05-26
FR8308700A FR2546609B1 (en) 1983-05-26 1983-05-26 DEVICE FOR CONNECTING A CONDENSING GAS APPLIANCE TO A CONTROLLED MECHANICAL VENTILATION CIRCUIT
FR8315892A FR2553176B2 (en) 1983-10-06 1983-10-06 DEVICE FOR CONNECTING A CONDENSING GAS APPARATUS TO A CONTROLLED MECHANICAL VENTILATION DUCT
FR8315892 1983-10-06

Publications (1)

Publication Number Publication Date
EP0128793A1 true EP0128793A1 (en) 1984-12-19

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EP84401005A Withdrawn EP0128793A1 (en) 1983-05-26 1984-05-17 Device for connecting a gas-fired condensing water heater to a mechanically controlled ventilation duct

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ES (1) ES532737A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837581A1 (en) * 1987-11-09 1989-05-18 Vaillant Joh Gmbh & Co Flow safety device for a boiler heated by a burner
FR2638821A1 (en) * 1988-11-09 1990-05-11 Gaz De France Method and device for improving the safety on a monitored mechanical ventilation installation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB138168A (en) * 1919-02-05 1920-02-05 John James Augustus Roe Improvements in or relating to ventilators
US2019246A (en) * 1932-09-30 1935-10-29 Bissonnette Francois Olivier Ventilator
FR2057566A5 (en) * 1969-08-28 1971-05-21 Saunier Duval
FR2409460A1 (en) * 1977-11-21 1979-06-15 Saunier Duval Safety gas-fired water heater - has electromagnetic valve for gas supply which responds to variations in combustion gases drawn off by fan
GB2056044A (en) * 1979-07-12 1981-03-11 Honeywell Inc Heating system with exhaust stack

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB138168A (en) * 1919-02-05 1920-02-05 John James Augustus Roe Improvements in or relating to ventilators
US2019246A (en) * 1932-09-30 1935-10-29 Bissonnette Francois Olivier Ventilator
FR2057566A5 (en) * 1969-08-28 1971-05-21 Saunier Duval
FR2409460A1 (en) * 1977-11-21 1979-06-15 Saunier Duval Safety gas-fired water heater - has electromagnetic valve for gas supply which responds to variations in combustion gases drawn off by fan
GB2056044A (en) * 1979-07-12 1981-03-11 Honeywell Inc Heating system with exhaust stack

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837581A1 (en) * 1987-11-09 1989-05-18 Vaillant Joh Gmbh & Co Flow safety device for a boiler heated by a burner
FR2638821A1 (en) * 1988-11-09 1990-05-11 Gaz De France Method and device for improving the safety on a monitored mechanical ventilation installation

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Publication number Publication date
ES8502533A1 (en) 1985-01-16
ES532737A0 (en) 1985-01-16

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