EP0924466B1 - Hot water generator with double diaphragm - Google Patents

Hot water generator with double diaphragm Download PDF

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Publication number
EP0924466B1
EP0924466B1 EP98403143A EP98403143A EP0924466B1 EP 0924466 B1 EP0924466 B1 EP 0924466B1 EP 98403143 A EP98403143 A EP 98403143A EP 98403143 A EP98403143 A EP 98403143A EP 0924466 B1 EP0924466 B1 EP 0924466B1
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EP
European Patent Office
Prior art keywords
chamber
hot water
cold
cold water
enclosure
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EP98403143A
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German (de)
French (fr)
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EP0924466A1 (en
Inventor
Jean-Michel Georges Marie Porcher
Philippe Georges Marie Varin
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Chaffoteaux et Maury SAS
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Chaffoteaux et Maury SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means

Definitions

  • the present invention relates to a hot water generator.
  • the invention relates more particularly to a water generator domestic hot water.
  • the cold room of said first enclosure is filled with water Cold.
  • the burner goes out, when the generator stops after drawing off, the water present in the heat exchanger and already heated during drawing, is superheated by the heat losses of the various constituent elements of the generator.
  • the cold water stored in the cold room during the drawing is expelled into the cold water circuit while the hot water present in the exchanger is transferred to the hot chamber of the first enclosure.
  • the hot water present in the exchanger is thus replaced by cold water.
  • said first enclosure is attached to the water circuits cold and hot water, which requires, in the event of failures, to replace it in its all, including parts that should not have been changed.
  • the hot water generator allows well to control the admission of fluid fuel to the burner to the passage of water in the exchanger, but does not reduce the overheating of the water or lower the average heat exchanger temperature.
  • the object of the present invention is to resolve the drawbacks mentioned above and to propose a hot water generator allowing to decrease the overheating of the water and lower the average temperature by the exchanger, and whose intake of combustible fluid to the burner is proportional to the quantity of hot water to be supplied during a drawing, while facilitating maintenance.
  • a hot water generator of the type mentioned above and known by FR 84 012 is characterized in that said first element movable and deudéme movable element came together to form a single double element, the two enclosures being placed side by side in a closed casing made up of two half-shells mounted opposite and separated by a joint plane at which said double element is disposed, forming a deformable membrane inside each of said enclosures, said cold chamber of said first enclosure being subjected to pressure prevailing in the cold water inlet pipe upstream of said means of restriction, so that the cold room and the upstream room are simultaneously filled while the hot chamber and the downstream chamber are simultaneously emptied and vice versa.
  • the hot water generator according to the present invention therefore allows not only to decrease the overheating of the water and to lower the temperature mean of the exchanger, but also to control the fuel intake fluid to the burner as the water passes through the exchanger while facilitating the maintenance thanks to the presence of the double element.
  • the hot water generator 1 shown in FIGS. 1 and 2 comprises, in a manner known per se, a cold water inlet pipe 2 connected to a circuit cold water 3, a hot water outlet pipe 4 connected to a water circuit hot 5, a heat exchanger 6 interposed between said cold water circuit 3 and the hot water circuit 5 and a fluid fuel burner 7 which transfers heat to the heat exchanger 6.
  • the fluid fuel used here is for example natural gas which when a user draws water hot, burns forming a flame ramp 8 whose heat is used to heat the water circulating in the heat exchanger 6 placed above the burner 7.
  • Natural gas is delivered to burner 7 according to the direction of arrows F via a power supply 10 consisting of a body 11 interposed between the burner 7 and two upper 12 and lower 13 half-shells mounted in vis-a-vis.
  • each of the two half-shells 12 and 13 are opposite the halves of a first enclosure 15 and a second enclosure 16. These two enclosures are thus placed side by side.
  • Each of the enclosures is of revolution shape, the first enclosure 15 having for example a cross section elliptical while the second enclosure 16 having a substantially rectangular cross section.
  • a double element 18 is arranged forming a deformable membrane inside each of enclosures 15 and 16.
  • the double element 18 consists of a first element 19 and of a second element 20 which each take respectively the shape of a first bowl 21 and a second bowl 22.
  • These two bowls 21 and 22 are for example mounted in opposition and are tangent according to their large diameter respective. This assembly facilitates emptying the speakers 15 and 16 during maintenance operations, but as a variant, the two bowls can be mounted in phase rather than in opposition. They are molded together in a material deformable and each have a radius allowing them to come to be applied, by deformation, against the walls upper 25 and lower 26 of the first enclosure 15 and the upper 27 and lower 28 walls of the second enclosure 16 respectively.
  • each of the bowls 21 and 22 has a radial edge 29, 30 substantially annular. These two bowls are therefore tangent to the level of their radial edges 29, 30 which are located in the same plane, for example here a substantially horizontal plane, and which constitute a seal for the two half-shells 12, 13.
  • each of the radial edges 29 and 30 has a bead 31, 32 substantially perpendicular to the plane defined by said radial edges and intended to engage in two grooves formed respectively in the half-shell 12, around the enclosures 15 and 16.
  • these restriction means 34 take the form of a Venturi 35 consisting of a convergent 36, a neck 37 and a divergent 38.
  • the first movable element 19 and the second movable element 20 respectively divide the first enclosure 15 in first 40 and second 41 rooms and the second enclosure 16 in first 42 and second 43 bedrooms.
  • the first chamber 40 of the first enclosure 15 is connected to the first chamber 42 of the second enclosure 16 by a conduit 44 formed in the two half-shells 12 and 13 at the level of the zone separating said two enclosures 15 and 16.
  • the second chamber 41 of the first enclosure 15 is connected, by a conduit 45 formed in the half-shell 13, to the hot water outlet pipe 4.
  • the first chamber 42 of the second enclosure 16 is in communication with the cold water inlet pipe 2, by a conduit 46 which opens into this conduit inlet 2 upstream of the Venturi 35.
  • the second chamber 43 of the second enclosure 16 communicates with this pipe inlet 2 by a conduit 47 which opens into the neck 37 of this Venturi.
  • Sealing means 48 have come from material with the radial edge 32 of the bowl 22. These means take the shape of a ring 49 whose internal diameter is substantially equal to the diameter of the conduit 47. This ring, located in the joint plane 17, seals between the two half-shells 12 and 13 and the duct 47. As a variant, the ring 49 is attached to the radial edge 32 instead to have come of matter with this one.
  • the first chamber 40 of the first enclosure 15 is called the cold room
  • the second room 41 of this pregnant is called hot room
  • the first chamber 42 of the second enclosure 16 is called chamber upstream
  • the second chamber 43 is called the downstream chamber.
  • the upstream chamber 42 and the cold room 40 are subjected to the pressure prevailing in the cold water inlet pipe 2.
  • the room hot 41 is subject to pressure in the line hot water outlet 4 and the downstream chamber 43 is subjected at the pressure prevailing in the neck 37 of the Venturi 35.
  • the water located at the outlet pipe 4 and discharged in the direction of the arrow F 2 has suffered a pressure drop with respect to the water entering the inlet duct 2.
  • the pressure in the hot room 41 is then lower than the pressure prevailing in the cold room 40 which is itself subjected to the cold water pressure coming from the upstream chamber 42.
  • the first displaceable element 19 is therefore subjected to a pressure difference which deforms it in the direction of the wall 26 or bottom wall of the first enclosure 15.
  • the first movable element 19 is stressed by return means 50 against the difference in pressure prevailing in the first enclosure 15, these means here taking the form of a compression spring. In drawing position, the first movable element 19 is deformed towards the wall 26 by compressing this spring 50.
  • the double element 18 has a hollowed-out lobe 51 formed integrally with the edges radials 29 and 30, at their tangency zone.
  • the lobe 51 is arranged in the vicinity of the edges radial 29 and 30, taking the form of a joint.
  • the body 11 of the power supply 10 has a base 55 in which a gas inlet 56 is arranged and at from which extends a conduit 57 supplying the 7 gas burner.
  • the base 55 is fixed to the first half-shell 12, at the second enclosure 16 in which moves the second movable member 20.
  • Sealing means 58 are arranged in the supply conduit 57. These means 58 consist of a valve 59 requested to come into abutment against a valve seat 60 by a compression spring 61, this compression spring being supported on a shoulder 62 of the conduit 57 of a part, and on the valve 59 on the other hand.
  • the base 55 of the body 11 has an axial bore 65 opening out opposite a bore 66 formed in the first half-shell 12 and opening out in the middle of the wall 27 of the downstream chamber 43 of the second enclosure 16.
  • This rod is preferably made in two parts 67a and 67b mounted end to end and with play in bores 65 and 66.
  • the rod 67 thus transmits the movement of the second element movable 20 to the valve 59.
  • this movable element 20 deforms in the direction of the wall 27, the valve 59 is raised and allows the passage of gas in the supply duct 57 and therefore to the burner.
  • the body 11 of the power supply 10 further comprises an arming button 70 and an ignition assembly 71 intended to stop or commission the generator hot water 1. These elements are not part of the invention.
  • Figure 1 shows the state of the burner during drawing hot water.
  • Cold water then enters the cold water inlet pipe 2 in the direction of the arrow F 1 .
  • the depression created by the Venturi 35 causes the displacement of the second displaceable element 20 in the direction of the wall 27 of the second enclosure 16 while the pressure drop causes the movement of the first displaceable element 19 in the direction of the wall 26 of the first enclosure 15, against the compression spring 50.
  • the water flow rate requested by the user creating more or less strong depressions in each of these enclosures, the upstream chamber 42 of the second enclosure 16 thus that the cold room 40 of the first enclosure 15 respectively have a volume equal to a fraction or to the entire volume of these speakers.
  • the hot water generator 1 When the user stops drawing water, the hot water generator 1 is in the state shown in the figure 2. The quantity of incoming cold water being zero, the Venturi 35 no longer creates depression in the second pregnant 16.
  • the valve 59 is then pushed back against its seat 60 by compression spring 61, thereby closing off the inlet gas to the burner 7.
  • the hot chamber 41 and the downstream chamber 43 respectively occupy substantially the entire volume of two enclosures 15 and 16, the movable elements 19 and 20 being respectively pushed against the upper wall 25 of the first enclosure 15 and the bottom wall 28 of the second enclosure 16.
  • This movement of the two movable elements 19 and 20 causes the expulsion of the cold water initially contained in these two enclosures. Much of this water cold then circulates in cold water circuit 3 and flushes the water present in exchanger 6 which has already been heated during burner 7 operation, just before stopping the drawing. This amount of hot water is then sent through the hot water circuit 5, in the hot chamber 41 of the first enclosure 15.
  • the average heat exchanger temperature is thus lowered and the overheating of the water is reduced while having a half-shell 13 which can be removed easily generator 1 during maintenance phases, revealing the two movable elements 19 and 20 come together together and which can therefore be so easily changed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Cookers (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Description

La présente invention est relative à un générateur d'eau chaude.The present invention relates to a hot water generator.

L'invention se rapporte plus particulièrement à un générateur d'eau chaude sanitaire.The invention relates more particularly to a water generator domestic hot water.

FR 2 609 162 décrit un tel générateur comprenant :

  • une conduite d'entrée d'eau froide reliée à un circuit eau froide ;
  • une conduite de sortie d'eau chaude reliée à un circuit eau chaude ;
  • un échangeur de chaleur interposé entre le circuit eau froide et le circuit eau chaude ;
  • un brûleur à combustible fluide transférant de la chaleur vers l'échangeur de chaleur ; et
  • une première enceinte divisée, par un premier élément déplaçable, en une chambre froide et une chambre chaude, la chambre froide étant soumise à la pression régnant dans la conduite d'entrée d'eau froide et la chambre chaude étant soumise à la pression régnant dans la conduite de sortie d'eau chaude, ledit premier élément étant déplaçable sous la différence de pression existant entre les deux chambres froide et chaude.
FR 2 609 162 describes such a generator comprising:
  • a cold water inlet pipe connected to a cold water circuit;
  • a hot water outlet pipe connected to a hot water circuit;
  • a heat exchanger interposed between the cold water circuit and the hot water circuit;
  • a fluid fuel burner transferring heat to the heat exchanger; and
  • a first enclosure divided, by a first movable element, into a cold room and a hot room, the cold room being subjected to the pressure prevailing in the cold water inlet pipe and the hot chamber being subjected to the pressure prevailing in the hot water outlet pipe, said first element being displaceable under the pressure difference existing between the two cold and hot chambers.

Lorsqu'un utilisateur puise de l'eau chaude chauffée par le générateur du type précité, la chambre froide de ladite première enceinte se remplit d'eau froide. A l'extinction du brûleur, lors de l'arrêt du générateur après puisage, l'eau présente dans l'échangeur de chaleur et déjà chauffée lors du puisage, est surchauffée par les pertes thermiques des divers éléments constitutifs du générateur.When a user draws hot water heated by the generator of the aforementioned type, the cold room of said first enclosure is filled with water Cold. When the burner goes out, when the generator stops after drawing off, the water present in the heat exchanger and already heated during drawing, is superheated by the heat losses of the various constituent elements of the generator.

Afin d'abaisser la température moyenne de l'eau présente dans l'échangeur, lors des phases d'arrêt, ainsi que de diminuer la surchauffe de l'eau, l'eau froide emmagasinée dans la chambre froide pendant le puisage est expulsée dans le circuit d'eau froide tandis que l'eau chaude présente dans l'échangeur est transférée dans la chambre chaude de la première enceinte. L'eau chaude présente dans l'échangeur est ainsi remplacée par de l'eau froide. In order to lower the average temperature of the water present in the exchanger, during the shutdown phases, as well as reducing the overheating of the water, the cold water stored in the cold room during the drawing is expelled into the cold water circuit while the hot water present in the exchanger is transferred to the hot chamber of the first enclosure. The hot water present in the exchanger is thus replaced by cold water.

Toutefois, ladite première enceinte est rapportée sur les circuits eau froide et eau chaude, ce qui impose, lors de défaillances, de la remplacer dans sa totalité, y compris des pièces qu'il n'aurait pas fallu changer.However, said first enclosure is attached to the water circuits cold and hot water, which requires, in the event of failures, to replace it in its all, including parts that should not have been changed.

FR 84 012 (addition au brevet FR 1 317 247) décrit un générateur d'eau chaude comprenant :

  • une conduite d'entrée d'eau froide reliée à un circuit eau froide,
  • une conduite de sortie d'eau chaude reliée à un circuit eau chaude,
  • un échangeur de chaleur interposé entre le circuit eau froide et le circuit eau chaude,
  • un brûleur à combustible fluide transférant de la chaleur vers l'échangeur de chaleur,
  • des moyens de restriction de la conduite d'entrée d'eau froide provoquant, lors du passage d'eau froide, une différence de pression entre l'amont et l'aval des moyens de restriction dans la conduite d'entrée d'eau froide,
  • une première enceinte divisée, par un premier élément déplaçable, en une chambre froide et une chambre chaude, la chambre froide étant reliée à la conduite d'entrée d'eau froide, et la chambre chaude étant soumise à la pression régnant dans la conduite de sortie d'eau chaude, ledit premier élément étant déplaçable sous la différence de pression existant entre les deux chambres froide et chaude,
  • une deuxième enceinte divisée, par un deuxième élément déplaçable, en une chambre amont et une chambre aval, la chambre amont étant soumise à la pression régnant dans la conduite d'entrée d'eau froide, en amont desdits moyens de restriction, et la chambre aval étant soumise à la pression régnant dans la conduite d'entrée d'eau froide, en aval desdits moyens de restriction, ledit deuxième élément étant déplaçable sous la différence de pression existant entre lesdites deux chambres amont et aval, et
  • une alimentation en combustible fluide qui délivre une quantité de combustible asservie au passage d'eau froide dans la conduite d'eau froide par l'intermédiaire des déplacements dudit deuxième élément déplaçable.
FR 84 012 (addition to patent FR 1 317 247) describes a hot water generator comprising:
  • a cold water inlet pipe connected to a cold water circuit,
  • a hot water outlet pipe connected to a hot water circuit,
  • a heat exchanger interposed between the cold water circuit and the hot water circuit,
  • a fluid fuel burner transferring heat to the heat exchanger,
  • means for restricting the cold water inlet pipe causing, during the passage of cold water, a pressure difference between upstream and downstream of the restriction means in the cold water inlet pipe ,
  • a first enclosure divided, by a first movable element, into a cold room and a hot room, the cold room being connected to the cold water inlet pipe, and the hot room being subjected to the pressure prevailing in the pipe hot water outlet, said first element being displaceable under the pressure difference existing between the two cold and hot chambers,
  • a second enclosure divided, by a second displaceable element, into an upstream chamber and a downstream chamber, the upstream chamber being subjected to the pressure prevailing in the cold water inlet pipe, upstream of said restriction means, and the chamber downstream being subjected to the pressure prevailing in the cold water inlet pipe, downstream of said restriction means, said second element being displaceable under the pressure difference existing between said two upstream and downstream chambers, and
  • a fluid fuel supply which delivers a quantity of fuel subject to the passage of cold water in the cold water pipe by means of the movements of said second movable element.

Dans FR 84 012, comme la chambre froide et la chambre aval sont une seule et même chambre reliée à la conduite d'entrée d'eau froide en aval des moyens de restriction de cette demière, le générateur d'eau chaude permet bien d'asservir l'admission de combustible fluide au brûleur au passage de l'eau dans l'échangeur, mais ne permet pas de diminuer la surchauffe de l'eau ni d'abaisser la température moyenne de l'échangeur.In FR 84 012, as the cold room and the downstream room are one and the same chamber connected to the cold water inlet pipe downstream of the means of restriction of this last, the hot water generator allows well to control the admission of fluid fuel to the burner to the passage of water in the exchanger, but does not reduce the overheating of the water or lower the average heat exchanger temperature.

La présente invention a pour but de résoudre les inconvénients mentionnés ci-dessus et de proposer un générateur d'eau chaude permettant de diminuer la surchauffe de l'eau et d'abaisser la température moyenne de l'échangeur, et dont l'admission de fluide combustible au brûleur soit proportionnelle à la quantité d'eau chaude à fournir lors d'un puisage, tout en facilitant la maintenance.The object of the present invention is to resolve the drawbacks mentioned above and to propose a hot water generator allowing to decrease the overheating of the water and lower the average temperature by the exchanger, and whose intake of combustible fluid to the burner is proportional to the quantity of hot water to be supplied during a drawing, while facilitating maintenance.

A cet effet, selon l'invention, un générateur d'eau chaude du type précité et connu par FR 84 012, est caractérisé en ce que lesdits premier élément déplaçable et deudéme élément déplaçable sont venus de matière ensemble pour former un seul élément double, les deux enceintes étant placées côte-à-côte dans un carter fermé constitué de deux demi-coques montées en vis-à-vis et séparées par un plan de joint au niveau duquel est disposé ledit élément double, formant une membrane déformable à l'intérieur de chacune desdites enceintes, ladite chambre froide de ladite première enceinte étant soumise à la pression régnant dans la conduite d'entrée d'eau froide en amont desdits moyens de restriction, de sorte que la chambre froide et la chambre amont sont simultanément remplies tandis que la chambre chaude et la chambre aval sont simultanément vidées et inversement.To this end, according to the invention, a hot water generator of the type mentioned above and known by FR 84 012, is characterized in that said first element movable and deudéme movable element came together to form a single double element, the two enclosures being placed side by side in a closed casing made up of two half-shells mounted opposite and separated by a joint plane at which said double element is disposed, forming a deformable membrane inside each of said enclosures, said cold chamber of said first enclosure being subjected to pressure prevailing in the cold water inlet pipe upstream of said means of restriction, so that the cold room and the upstream room are simultaneously filled while the hot chamber and the downstream chamber are simultaneously emptied and vice versa.

Le générateur d'eau chaude selon la présente invention permet donc non seulement de diminuer la surchauffe de l'eau et d'abaisser la température moyenne de l'échangeur, mais également d'asservir l'admission de combustible fluide au brûleur au passage de l'eau dans l'échangeur tout en facilitant la maintenance grâce à la présence de l'élément double.The hot water generator according to the present invention therefore allows not only to decrease the overheating of the water and to lower the temperature mean of the exchanger, but also to control the fuel intake fluid to the burner as the water passes through the exchanger while facilitating the maintenance thanks to the presence of the double element.

Le générateur suivant l'invention peut éventuellement comporter en outre une ou plusieurs des caractéristiques suivantes :

  • les deux enceintes sont de révolution et l'élément double comporte deux cuvettes tangentes selon leur grand diamètre ;
  • les deux cuvettes comportent des bords radiaux fixés à mi-hauteur de chaque enceinte et ont chacune un rayon adapté aux dimensions de l'enceinte dans laquelle elles sont respectivement placées pour venir au voisinage des parois desdites enceintes ;
  • les deux cuvettes sont montées en opposition, ce qui permet de faciliter la vidange ;
  • les grands diamètres des deux cuvettes sont dans un même plan ;
  • la cuvette de la première enceinte est sollicitée par des moyens de rappel à l'encontre de la pression régnant dans la conduite d'entrée d'eau froide ;
  • la chambre froide est reliée à la chambre amont et la chambre chaude est reliée à la conduite de sortie d'eau chaude ;
  • le générateur foumit de l'eau chaude sanitaire, le combustible fluide est du gaz et l'alimentation en gaz est asservie au passage d'eau froide au moyen d'une tige dont une première extrémité est solidaire de moyens d'obturation dé l'alimentation en gaz et dont l'autre extrémité est solidaire dudit deuxième élément déplaçable ;
  • dans les deux demi-coques sont respectivement ménagées sensiblement les moitiés des première et deuxième enceintes, les bords radiaux des deux cuvettes formant joint d'étanchéité entre les deux demi-coques et un lobe évidé est venu de matière au voisinage de la zone de tangence des bords radiaux des deux enceintes afin d'assurer l'étanchéité d'un passage mettant en communication la chambre froide avec la chambre amont, les bords radiaux comprenant en outre un bourrelet destiné à pénétrer dans une gorge ménagée dans l'une des demi-coques ; et
  • des moyens d'étanchéité sont venus de matière avec le bord radial et/ou le bourrelet de l'une des deux cuvettes afin d'assurer l'étanchéité d'un passage mettant en communication fluidique la chambre aval avec les moyens de restriction.
The generator according to the invention may optionally further include one or more of the following characteristics:
  • the two enclosures are of revolution and the double element comprises two tangent cuvettes according to their large diameter;
  • the two bowls have radial edges fixed at mid-height of each enclosure and each have a radius adapted to the dimensions of the enclosure in which they are respectively placed to come in the vicinity of the walls of said enclosures;
  • the two bowls are mounted in opposition, which facilitates emptying;
  • the large diameters of the two bowls are in the same plane;
  • the bowl of the first enclosure is urged by return means against the pressure prevailing in the cold water inlet pipe;
  • the cold room is connected to the upstream room and the hot room is connected to the hot water outlet pipe;
  • the generator provides domestic hot water, the fluid fuel is gas and the gas supply is controlled by the passage of cold water by means of a rod, a first end of which is secured to means for closing off the gas supply and the other end of which is integral with said second movable element;
  • in the two half-shells are respectively formed substantially the halves of the first and second enclosures, the radial edges of the two bowls forming a seal between the two half-shells and a hollowed out lobe has come in the material in the vicinity of the tangency zone radial edges of the two enclosures in order to seal a passage connecting the cold room with the upstream chamber, the radial edges further comprising a bead intended to penetrate a groove formed in one of the half hulls; and
  • sealing means came integrally with the radial edge and / or the bead of one of the two bowls in order to seal a passage putting the downstream chamber in fluid communication with the restriction means.

Un exemple de réalisation de l'invention va maintenant être décrit en regard des dessins annexés, sur lesquels :

  • la figure 1 est une vue en coupe longitudinale d'un générateur d'eau chaude selon la présente invention en position de puisage d'eau chaude ;
  • la figure 2 est une vue en coupe longitudinale du générateur d'eau chaude de la figure 1 représenté en position arrêt juste après puisage ; et
  • la figure 3 est une vue en perspective de l'élément double intégré au générateur représenté aux figures 1 et 2.
An embodiment of the invention will now be described with reference to the accompanying drawings, in which:
  • Figure 1 is a longitudinal sectional view of a hot water generator according to the present invention in the hot water drawing position;
  • Figure 2 is a longitudinal sectional view of the hot water generator of Figure 1 shown in the off position just after drawing; and
  • FIG. 3 is a perspective view of the double element integrated into the generator shown in FIGS. 1 and 2.

Le générateur d'eau chaude 1 représenté aux figures 1 et 2 comprend, de manière connue en soi, une conduite d'entrée d'eau froide 2 reliée à un circuit d'eau froide 3, une conduite de sortie d'eau chaude 4 reliée à un circuit d'eau chaude 5, un échangeur de chaleur 6 interposé entre ledit circuit d'eau froide 3 et le circuit d'eau chaude 5 et un brûleur 7 à combustible fluide qui transfère de la chaleur vers l'échangeur de chaleur 6.The hot water generator 1 shown in FIGS. 1 and 2 comprises, in a manner known per se, a cold water inlet pipe 2 connected to a circuit cold water 3, a hot water outlet pipe 4 connected to a water circuit hot 5, a heat exchanger 6 interposed between said cold water circuit 3 and the hot water circuit 5 and a fluid fuel burner 7 which transfers heat to the heat exchanger 6.

Le combustible fluide utilisé ici est par exemple du gaz naturel qui, lorsqu'un utilisateur puise de l'eau chaude, brûle en formant une rampe de flammes 8 dont la chaleur est utilisée pour chauffer l'eau circulant dans l'échangeur de chaleur 6 placé au-dessus du brûleur 7.The fluid fuel used here is for example natural gas which when a user draws water hot, burns forming a flame ramp 8 whose heat is used to heat the water circulating in the heat exchanger 6 placed above the burner 7.

Le gaz naturel est délivré au brûleur 7 selon le sens des flèches F par l'intermédiaire d'une alimentation 10 constituée d'un corps 11 interposé entre le brûleur 7 et deux demi-coques supérieure 12 et inférieure 13 montées en vis-à-vis.Natural gas is delivered to burner 7 according to the direction of arrows F via a power supply 10 consisting of a body 11 interposed between the burner 7 and two upper 12 and lower 13 half-shells mounted in vis-a-vis.

Ces deux demi-coques constituent un carter fermé. Dans la demi-coque inférieure 13 sont ménagées les conduites d'entrée d'eau froide 2 à partir de laquelle s'étend le circuit d'eau froide 3 d'une part, et la conduite de sortie d'eau chaude 4 qui est reliée au circuit d'eau chaude 5 d'autre part.These two half-shells constitute a closed casing. In the lower half-shell 13 are formed the pipes cold water inlet 2 from which the cold water circuit 3 on the one hand, and the outlet pipe hot water 4 which is connected to the hot water circuit 5 on the other hand.

Dans chacune des deux demi-coques 12 et 13 sont ménagées en vis-à-vis les moitiés d'une première enceinte 15 et d'une deuxième enceinte 16. Ces deux enceintes sont ainsi placées côte à côte.In each of the two half-shells 12 and 13 are opposite the halves of a first enclosure 15 and a second enclosure 16. These two enclosures are thus placed side by side.

Chacune des enceintes est de forme de révolution, la première enceinte 15 ayant par exemple une section transversale en forme d'ellipse tandis que la deuxième enceinte 16 ayant une section transversale sensiblement rectangulaire.Each of the enclosures is of revolution shape, the first enclosure 15 having for example a cross section elliptical while the second enclosure 16 having a substantially rectangular cross section.

Au niveau d'un plan de joint 17 séparant les deux demi-coques 12 et 13, est disposé un élément double 18 formant une membrane déformable à l'intérieur de chacune des enceintes 15 et 16.At a joint plane 17 separating the two half-shells 12 and 13, a double element 18 is arranged forming a deformable membrane inside each of enclosures 15 and 16.

Comme le montre plus particulièrement la figure 3, l'élément double 18 est constitué d'un premier élément 19 et d'un deuxième élément 20 qui prennent chacun respectivement la forme d'une première cuvette 21 et d'une deuxième cuvette 22.As shown more particularly in Figure 3, the double element 18 consists of a first element 19 and of a second element 20 which each take respectively the shape of a first bowl 21 and a second bowl 22.

Ces deux cuvettes 21 et 22 sont par exemple montées en opposition et sont tangentes selon leur grand diamètre respectif. Ce montage facilite la vidange des enceintes 15 et 16 lors des opérations de maintenance, mais en variante, les deux cuvettes peuvent être montées en phase plutôt qu'en opposition. Elles sont moulées ensemble en une matière déformable et possèdent chacune un rayon leur permettant de venir s'appliquer, par déformation, contre les parois supérieure 25 et inférieure 26 de la première enceinte 15 et les parois supérieure 27 et inférieure 28 de la deuxième enceinte 16 respectivement.These two bowls 21 and 22 are for example mounted in opposition and are tangent according to their large diameter respective. This assembly facilitates emptying the speakers 15 and 16 during maintenance operations, but as a variant, the two bowls can be mounted in phase rather than in opposition. They are molded together in a material deformable and each have a radius allowing them to come to be applied, by deformation, against the walls upper 25 and lower 26 of the first enclosure 15 and the upper 27 and lower 28 walls of the second enclosure 16 respectively.

Au niveau de leur grand diamètre, chacune des cuvettes 21 et 22 possède un bord radial 29, 30 sensiblement annulaire. Ces deux cuvettes sont donc tangentes au niveau de leurs bords radiaux 29, 30 qui sont situés dans un même plan, par exemple ici un plan sensiblement horizontal, et qui constituent un joint d'étanchéite pour les deux demi-coques 12, 13.In terms of their large diameter, each of the bowls 21 and 22 has a radial edge 29, 30 substantially annular. These two bowls are therefore tangent to the level of their radial edges 29, 30 which are located in the same plane, for example here a substantially horizontal plane, and which constitute a seal for the two half-shells 12, 13.

Afin d'améliorer encore l'étanchéité de l'ensemble, chacun des bords radiaux 29 et 30 possède un bourrelet 31, 32 sensiblement perpendiculaire au plan défini par lesdits bords radiaux et destiné à s'engager dans deux gorges ménagées respectivement dans la demi-coque 12, autour des enceintes 15 et 16.In order to further improve the tightness of the assembly, each of the radial edges 29 and 30 has a bead 31, 32 substantially perpendicular to the plane defined by said radial edges and intended to engage in two grooves formed respectively in the half-shell 12, around the enclosures 15 and 16.

Dans la conduite d'entrée d'eau froide 2 sont disposés des moyens de restriction 34 de la section de cette conduite destinés à provoquer, lors du passage d'eau froide pendant le puisage, une chute de pression. Par exemple, ces moyens de restriction 34 prennent la forme d'un Venturi 35 constitué d'un convergent 36, d'un col 37 et d'un divergent 38.In the cold water inlet pipe 2 are disposed of the restriction means 34 of the section of this pipe intended to cause, during the passage of cold water during the drawing, a pressure drop. For example, these restriction means 34 take the form of a Venturi 35 consisting of a convergent 36, a neck 37 and a divergent 38.

Le premier élément déplaçable 19 et le deuxième élément déplaçable 20 divisent respectivement la première enceinte 15 en des première 40 et deuxième 41 chambres et la deuxième enceinte 16 en des première 42 et deuxième 43 chambres.The first movable element 19 and the second movable element 20 respectively divide the first enclosure 15 in first 40 and second 41 rooms and the second enclosure 16 in first 42 and second 43 bedrooms.

La première chambre 40 de la première enceinte 15 est reliée à la première chambre 42 de la deuxième enceinte 16 par un conduit 44 ménagé dans les deux demi-coques 12 et 13 au niveau de la zone séparant lesdites deux enceintes 15 et 16. La deuxième chambre 41 de la première enceinte 15 est reliée, par un conduit 45 ménagé dans la demi-coque 13, à la conduite de sortie d'eau chaude 4.The first chamber 40 of the first enclosure 15 is connected to the first chamber 42 of the second enclosure 16 by a conduit 44 formed in the two half-shells 12 and 13 at the level of the zone separating said two enclosures 15 and 16. The second chamber 41 of the first enclosure 15 is connected, by a conduit 45 formed in the half-shell 13, to the hot water outlet pipe 4.

La première chambre 42 de la deuxième enceinte 16 est en communication avec la conduite d'entrée d'eau froide 2, par un conduit 46 qui débouche dans cette conduite d'entrée 2 en amont du Venturi 35. La deuxième chambre 43 de la deuxième enceinte 16 communique avec cette conduite d'entrée 2 par un conduit 47 qui débouche dans le col 37 de ce Venturi.The first chamber 42 of the second enclosure 16 is in communication with the cold water inlet pipe 2, by a conduit 46 which opens into this conduit inlet 2 upstream of the Venturi 35. The second chamber 43 of the second enclosure 16 communicates with this pipe inlet 2 by a conduit 47 which opens into the neck 37 of this Venturi.

Des moyens d'étanchéité 48 sont venus de matière avec le bord radial 32 de la cuvette 22. Ces moyens prennent la forme d'un anneau 49 dont le diamètre intérieur est sensiblement égal au diamètre du conduit 47. Cet anneau, situé dans le plan de joint 17, assure l'étanchéité entre les deux demi-coques 12 et 13 et le conduit 47. En variante, l'anneau 49 est rapporté sur le bord radial 32 au lieu d'être venu de matière avec celui-ci.Sealing means 48 have come from material with the radial edge 32 of the bowl 22. These means take the shape of a ring 49 whose internal diameter is substantially equal to the diameter of the conduit 47. This ring, located in the joint plane 17, seals between the two half-shells 12 and 13 and the duct 47. As a variant, the ring 49 is attached to the radial edge 32 instead to have come of matter with this one.

La première chambre 40 de la première enceinte 15 est appelée chambre froide, la deuxième chambre 41 de cette enceinte est appelée chambre chaude tandis que la première chambre 42 de la deuxième enceinte 16 est appelée chambre amont et la deuxième chambre 43 est appelée chambre aval.The first chamber 40 of the first enclosure 15 is called the cold room, the second room 41 of this pregnant is called hot room while the first chamber 42 of the second enclosure 16 is called chamber upstream and the second chamber 43 is called the downstream chamber.

On comprend donc que la chambre amont 42 et la chambre froide 40 sont soumises à la pression régnant dans la conduite d'entrée d'eau froide 2. De même, la chambre chaude 41 est soumise à la pression régnant dans la conduite de sortie d'eau chaude 4 et la chambre aval 43 est soumise à la pression régnant dans le col 37 du Venturi 35.It is therefore understood that the upstream chamber 42 and the cold room 40 are subjected to the pressure prevailing in the cold water inlet pipe 2. Similarly, the room hot 41 is subject to pressure in the line hot water outlet 4 and the downstream chamber 43 is subjected at the pressure prevailing in the neck 37 of the Venturi 35.

Lors d'un puisage d'eau chaude, de l'eau froide pénètre dans la conduite d'entrée 2 selon le sens de la flèche F1. La présence du Venturi 35 provoque une différence de pression entre les conduits 46 et 47 menant respectivement à la chambre amont 42 et à la chambre aval 43 de la deuxième enceinte 16. Cette différence de pression provoque une déformation du deuxième élément déplaçable 20 en direction de la paroi 27 ou paroi supérieure de cette enceinte. De l'eau froide remplit donc la majeure partie du volume de l'enceinte 16.When drawing hot water, cold water enters the inlet pipe 2 in the direction of the arrow F 1 . The presence of the Venturi 35 causes a pressure difference between the conduits 46 and 47 leading respectively to the upstream chamber 42 and to the downstream chamber 43 of the second enclosure 16. This pressure difference causes a deformation of the second movable element 20 in the direction of the wall 27 or upper wall of this enclosure. Cold water therefore fills most of the volume of enclosure 16.

Après avoir circulé dans le circuit d'eau froide 3, dans l'échangeur de chaleur 6 et dans le circuit d'eau chaude 5, l'eau située au niveau de la conduite de sortie 4 et évacuée selon le sens de la flèche F2 a subi une perte de charge par rapport à l'eau entrant dans le conduit d'entrée 2. La pression dans la chambre chaude 41 est alors plus faible que la pression régnant dans la chambre froide 40 qui est, elle, soumise à la pression de l'eau froide venant de la chambre amont 42. Le premier élément déplaçable 19 est donc soumis à une différence de pression qui le déforme en direction de la paroi 26 ou paroi inférieure de la première enceinte 15.After having circulated in the cold water circuit 3, in the heat exchanger 6 and in the hot water circuit 5, the water located at the outlet pipe 4 and discharged in the direction of the arrow F 2 has suffered a pressure drop with respect to the water entering the inlet duct 2. The pressure in the hot room 41 is then lower than the pressure prevailing in the cold room 40 which is itself subjected to the cold water pressure coming from the upstream chamber 42. The first displaceable element 19 is therefore subjected to a pressure difference which deforms it in the direction of the wall 26 or bottom wall of the first enclosure 15.

Le premier élément déplaçable 19 est sollicité par des moyens de rappel 50 à l'encontre de la différence de pression régnant dans la première enceinte 15, ces moyens prenant ici la forme d'un ressort de compression. En position de puisage, le premier élément déplaçable 19 est déformé en direction de la paroi 26 en comprimant ce ressort 50.The first movable element 19 is stressed by return means 50 against the difference in pressure prevailing in the first enclosure 15, these means here taking the form of a compression spring. In drawing position, the first movable element 19 is deformed towards the wall 26 by compressing this spring 50.

Afin d'assurer l'étanchéité entre les deux demi-coques 12 et 13 au niveau de la zone de séparation entre les première 15 et deuxième 16 enceintes, l'élément double 18 possède un lobe évidé 51 venu de matière avec les bords radiaux 29 et 30, au niveau de leur zone de tangence. En variante, le lobe 51 est disposé au voisinage des bords radiaux 29 et 30, en prenant la forme d'un joint.To seal between the two half-shells 12 and 13 at the level of the separation zone between the first 15 and second 16 enclosures, the double element 18 has a hollowed-out lobe 51 formed integrally with the edges radials 29 and 30, at their tangency zone. In variant, the lobe 51 is arranged in the vicinity of the edges radial 29 and 30, taking the form of a joint.

Le corps 11 de l'alimentation 10 comporte une embase 55 dans laquelle est ménagée une arrivée de gaz 56 et à partir de laquelle s'étend un conduit 57 d'alimentation du brûleur 7 en gaz.The body 11 of the power supply 10 has a base 55 in which a gas inlet 56 is arranged and at from which extends a conduit 57 supplying the 7 gas burner.

L'embase 55 est fixée sur la première demi-coque 12, au niveau de la deuxième enceinte 16 dans laquelle se déplace le deuxième élément déplaçable 20.The base 55 is fixed to the first half-shell 12, at the second enclosure 16 in which moves the second movable member 20.

Des moyens d'obturation 58 sont disposés dans le conduit d'amenée 57. Ces moyens 58 consistent en un clapet 59 sollicité pour venir en appui contre un siège de clapet 60 par un ressort de compression 61, ce ressort de compression étant en appui sur un épaulement 62 du conduit 57 d'une part, et sur le clapet 59 d'autre part.Sealing means 58 are arranged in the supply conduit 57. These means 58 consist of a valve 59 requested to come into abutment against a valve seat 60 by a compression spring 61, this compression spring being supported on a shoulder 62 of the conduit 57 of a part, and on the valve 59 on the other hand.

L'embase 55 du corps 11 comporte un alésage axial 65 débouchant en vis-à-vis d'un alésage 66 ménagé dans la première demi-coque 12 et débouchant au milieu de la paroi 27 de la chambre aval 43 de la deuxième enceinte 16.The base 55 of the body 11 has an axial bore 65 opening out opposite a bore 66 formed in the first half-shell 12 and opening out in the middle of the wall 27 of the downstream chamber 43 of the second enclosure 16.

Dans ces alésages 65 et 66 est montée mobile une tige 67 dont une première extrémité 68 est fixée au clapet 59 et dont une deuxième extrémité 69 est fixée au deuxième élément déplaçable 20 ou en appui sur cet élément. Cette tige est de préférence réalisée en deux parties 67a et 67b montées bout à bout et avec jeu dans les alésages 65 et 66. La tige 67 transmet ainsi le mouvement du deuxième élément déplaçable 20 au clapet 59. Lorsque cet élément déplaçable 20 se déforme en direction de la paroi 27, le clapet 59 est soulevé et permet le passage du gaz dans le conduit d'amenée 57 et donc au brûleur. A l'opposé, lorsque l'élément déplaçable 20 est déformé en direction de la paroi 28 de la deuxième enceinte 16, la tige 67 amène le clapet en butée sur son siège 60, assistée par la poussée du ressort de compression 61. L'alimentation en gaz du brûleur 7 est alors totalement arrêtée. Entre les deux positions totalement ouverte et totalement fermée, le clapet occupe toutes les positions intermédiaires permettant de réguler la quantité de gaz arrivant au brûleur 7.In these bores 65 and 66 is movably mounted a rod 67 of which a first end 68 is fixed to the valve 59 and of which a second end 69 is fixed to the second movable element 20 or supported on this element. This rod is preferably made in two parts 67a and 67b mounted end to end and with play in bores 65 and 66. The rod 67 thus transmits the movement of the second element movable 20 to the valve 59. When this movable element 20 deforms in the direction of the wall 27, the valve 59 is raised and allows the passage of gas in the supply duct 57 and therefore to the burner. In contrast, when the element displaceable 20 is deformed in the direction of the wall 28 of the second enclosure 16, the rod 67 brings the valve into abutment on its seat 60, assisted by the thrust of the spring of compression 61. The gas supply to the burner 7 is then totally stopped. Between the two positions totally open and fully closed, the valve occupies all intermediate positions to regulate the quantity gas arriving at the burner 7.

Le corps 11 de l'alimentation 10 comprend en outre un bouton d'armement 70 et un ensemble d'allumage 71 destinés à arrêter ou à mettre en service le générateur d'eau chaude 1. Ces éléments ne font pas partie ici de l'invention. The body 11 of the power supply 10 further comprises an arming button 70 and an ignition assembly 71 intended to stop or commission the generator hot water 1. These elements are not part of the invention.

Le fonctionnement du générateur 1 va maintenant être expliqué en regard des figures 1 et 2.The operation of generator 1 will now be explained with reference to Figures 1 and 2.

La figure 1 représente l'état du brûleur en cours de puisage d'eau chaude.Figure 1 shows the state of the burner during drawing hot water.

De l'eau froide pénètre alors dans la conduite d'entrée d'eau froide 2 selon le sens de la flèche F1. La dépression créée par le Venturi 35 (comme expliqué précédemment) provoque le déplacement du deuxième élément déplaçable 20 en direction de la paroi 27 de la deuxième enceinte 16 tandis que la perte de charge provoque le mouvement du premier élément déplaçable 19 en direction de la paroi 26 de la première enceinte 15, à l'encontre du ressort de compression 50. Le débit d'eau demandé par l'utilisateur créant des dépressions plus ou moins fortes dans chacune de ces enceintes, la chambre amont 42 de la deuxième enceinte 16 ainsi que la chambre froide 40 de la première enceinte 15 possèdent respectivement un volume égal à une fraction ou à la totalité du volume de ces enceintes.Cold water then enters the cold water inlet pipe 2 in the direction of the arrow F 1 . The depression created by the Venturi 35 (as explained above) causes the displacement of the second displaceable element 20 in the direction of the wall 27 of the second enclosure 16 while the pressure drop causes the movement of the first displaceable element 19 in the direction of the wall 26 of the first enclosure 15, against the compression spring 50. The water flow rate requested by the user creating more or less strong depressions in each of these enclosures, the upstream chamber 42 of the second enclosure 16 thus that the cold room 40 of the first enclosure 15 respectively have a volume equal to a fraction or to the entire volume of these speakers.

Plus la quantité d'eau froide entrante est importante, plus la dépression créée par le Venturi dans la deuxième enceinte 16 est forte et donc plus le deuxième élément déplaçable 20 se déplace en direction de la paroi 27 de la chambre aval 43 de cette enceinte. Ceci provoque un déplacement d'autant plus important de la tige 67 et donc une ouverture du clapet 59 d'autant plus importante. Inversement, une dépression plus faible liée à une quantité d'eau froide entrante plus faible provoque un déplacement du deuxième élément déplaçable 20 moins important et donc une ouverture du clapet 59 plus faible. La quantité de gaz délivré au brûleur 7 est donc asservie à la quantité d'eau froide traversant le circuit d'eau froide 3 par l'intermédiaire des mouvements du deuxième élément déplaçable 20.The greater the quantity of incoming cold water, plus the depression created by the Venturi in the second enclosure 16 is strong and therefore no longer the second element movable 20 moves towards the wall 27 of the downstream chamber 43 of this enclosure. This causes displacement all the more important of the rod 67 and therefore a valve 59 opens all the more important. Conversely, a lower depression linked to an amount of water lower incoming cold causes displacement of the second smaller movable element 20 and therefore a valve 59 opening lower. The amount of gas delivered to burner 7 is therefore subject to the amount of water cold through cold water circuit 3 via movements of the second movable element 20.

Lorsque l'utilisateur arrête de puiser de l'eau, le générateur d'eau chaude 1 est dans l'état représenté à la figure 2. La quantité d'eau froide entrante étant nulle, le Venturi 35 ne crée plus de dépression dans la deuxième enceinte 16.When the user stops drawing water, the hot water generator 1 is in the state shown in the figure 2. The quantity of incoming cold water being zero, the Venturi 35 no longer creates depression in the second pregnant 16.

Le clapet 59 est alors repoussé contre son siège 60 par le ressort de compression 61, obturant ainsi l'arrivée de gaz au brûleur 7. La chambre chaude 41 et la chambre aval 43 occupent respectivement sensiblement tout le volume des deux enceintes 15 et 16, les éléments déplaçables 19 et 20 étant respectivement repoussés contre la paroi supérieure 25 de la première enceinte 15 et la paroi inférieure 28 de la deuxième enceinte 16.The valve 59 is then pushed back against its seat 60 by compression spring 61, thereby closing off the inlet gas to the burner 7. The hot chamber 41 and the downstream chamber 43 respectively occupy substantially the entire volume of two enclosures 15 and 16, the movable elements 19 and 20 being respectively pushed against the upper wall 25 of the first enclosure 15 and the bottom wall 28 of the second enclosure 16.

Ce mouvement des deux éléments déplaçables 19 et 20 entraíne l'expulsion de l'eau froide contenue initialement dans ces deux enceintes. Une grande partie de cette eau froide circule alors dans le circuit d'eau froide 3 et chasse l'eau présente dans l'échangeur 6 qui a déjà été chauffée lors du fonctionnement du brûleur 7, juste avant l'arrêt du puisage. Cette quantité d'eau chaude est alors envoyée au travers du circuit d'eau chaude 5, dans la chambre chaude 41 de la première enceinte 15.This movement of the two movable elements 19 and 20 causes the expulsion of the cold water initially contained in these two enclosures. Much of this water cold then circulates in cold water circuit 3 and flushes the water present in exchanger 6 which has already been heated during burner 7 operation, just before stopping the drawing. This amount of hot water is then sent through the hot water circuit 5, in the hot chamber 41 of the first enclosure 15.

La température moyenne de l'échangeur est ainsi abaissée et la surchauffe de l'eau est diminuée tout en disposant d'une demi-coque 13 qui peut être retirée facilement du générateur 1 lors des phases de maintenance, laissant apparaítre les deux éléments déplaçables 19 et 20 venus de matière ensemble et qui peuvent donc être ainsi facilement changés.The average heat exchanger temperature is thus lowered and the overheating of the water is reduced while having a half-shell 13 which can be removed easily generator 1 during maintenance phases, revealing the two movable elements 19 and 20 come together together and which can therefore be so easily changed.

Claims (10)

  1. Hot water generator comprising :
    a cold water inlet pipe (2) connected to a cold water circuit (3) ;
    a hot water outlet pipe (4) connected to a hot water circuit (5) ;
    a heat exchanger (6) interposed between the cold water circuit (3) and the hot water circuit (5) ;
    a fluid-fuel burner (7) transferring heat to the heat exchanger (6) ;
    means of restriction (34) of the cold water inlet pipe (2) causing, during the passage of cold water, a pressure difference between positions upstream and downstream of the means of restriction (34) in the cold water inlet pipe (2) ;
    a first enclosure (15) divided, by a first displaceable element (19), into a cold chamber (40) and a hot chamber (41), the cold chamber (40) being connected to the cold water inlet pipe (2) and the hot chamber (41) being subjected to the pressure prevailing in the hot water outlet pipe (4), said first element (19) being displaceable under the pressure difference existing between the two chambers, cold (40) and hot (41),
    a second enclosure (16) divided, by a second displaceable element (20), into an upstream chamber (42) and a downstream chamber (43), the upstream chamber (42) being subjected to the pressure prevailing in the cold water inlet pipe (2), upstream of said means of restriction (34), and the downstream chamber (43) being subjected to the pressure prevailing in the cold water inlet pipe (2), downstream of said means of restriction (34), said second element (20) being displaceable under the pressure difference existing between said two chambers, upstream (42) and downstream (43); and
    a fluid-fuel feed (10) which delivers a quantity of fuel which is slaved to the passage of cold water through the cold water pipe (2) by way of the displacements of said second displaceable element (20),
    characterized in that said first displaceable element (19) and second displaceable element (20) are made as a one-piece assembly so as to form a single double element (18), the two enclosures (15, 16) being placed side by side in a closed casing made of two half-shells (12, 13) mounted facing one another and separated by a sealing plane (17) at the level of which there is disposed said double element (18) forming a deformable membrane inside each of said enclosures (15, 16), said cold chamber (40) of said first enclosure (15) being subjected to the pressure prevailing in the cold water inlet pipe (2), upstream of said means of restriction (34), so that the cold chamber (40) and the upstream chamber (42) are simultaneously filled whilst the hot chamber (41) and the downstream chamber (43) are simultaneously emptied and vice versa.
  2. Hot water generator according to Claim 1, characterized in that the two enclosures (15, 16) are axisymmetric and the double element (18) comprises two dishes (21, 22) tangential along their large diameter.
  3. Hot water generator according to Claim 2, characterized in that the two dishes (21, 22) comprise radial edges (29, 30) fixed mid-way up the height of each enclosure (15, 16) and each have a radius adapted to the dimensions of the enclosure (15, 16) in which they are respectively placed so as to be located in the vicinity of the walls (25, 26, 27, 28) of said enclosures (15, 16).
  4. Hot water generator according to Claim 2 or 3, characterized in that the two dishes (21, 22) are mounted in opposition.
  5. Hot water generator according to any one of Claims 2 to 4,
    characterized in that the large diameters of the two dishes (21, 22) are in the same plane.
  6. Hot water generator according to any one of Claims 2 to 5,
    characterized in that the dish (21) of the first enclosure (15) is impelled by restoring means (50) acting against the pressure prevailing in the cold water inlet pipe (2).
  7. Hot water generator according to any one of Claims 1 to 6,
    characterized in that the cold chamber (40) is connected to the upstream chamber (42) and the hot chamber (41) is connected to the hot water outlet pipe (4).
  8. Hot water generator according to any one of Claims 1 to 7,
    characterized in that it provides sanitary hot water, the fluid fuel is gas and in that the gas feed (10) is slaved to the passage of cold water by means of a rod (67), a first end (68) of which is secured to means (58) for shutting off the gas feed (10) and the other end (69) of which is secured to said second displaceable element (20).
  9. Hot water generator according to any one of Claims 2 to 6,
    characterized in that substantially the halves of the first and second enclosures (15, 16) are respectively made in the two half-shells (12, 13), the radial edges (29, 30) of the two dishes (21, 22) forming a leaktight seal between the two half-shells (12, 13), and in that a recessed lobe (51) is made as one piece in the vicinity of the zone of tangency of the radial edges (29, 30) of the two enclosures (15, 16) so as to ensure the leaktighness of a passage (44) placing the cold chamber (40) in communication with the upstream chamber (42), the radial edges (29, 30) furthermore comprising a bead (31, 32) intended to enter a groove made in one (12) of the half-shells (12, 13).
  10. Hot water generator according to Claim 9, characterized in that leaktight means (48) are made in one piece with the radial edge (30) and/or the bead (32) of one (22) of the two dishes (21, 22) so as to ensure the leaktightness of a passage (47) placing the downstream chamber (43) in fluid communication with the means of restriction (34).
EP98403143A 1997-12-16 1998-12-14 Hot water generator with double diaphragm Expired - Lifetime EP0924466B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9715944A FR2772466B1 (en) 1997-12-16 1997-12-16 HOT WATER GENERATOR WITH DOUBLE MEMBRANE
FR9715944 1997-12-16

Publications (2)

Publication Number Publication Date
EP0924466A1 EP0924466A1 (en) 1999-06-23
EP0924466B1 true EP0924466B1 (en) 2002-02-13

Family

ID=9514675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98403143A Expired - Lifetime EP0924466B1 (en) 1997-12-16 1998-12-14 Hot water generator with double diaphragm

Country Status (14)

Country Link
EP (1) EP0924466B1 (en)
CN (1) CN1110657C (en)
AR (1) AR017432A1 (en)
BR (1) BR9805792A (en)
DE (1) DE69803829T2 (en)
DZ (1) DZ2672A1 (en)
ES (1) ES2172868T3 (en)
FR (1) FR2772466B1 (en)
HK (1) HK1019633A1 (en)
MA (1) MA24713A1 (en)
PT (1) PT924466E (en)
TN (1) TNSN98226A1 (en)
TR (1) TR199802600A3 (en)
TW (1) TW397914B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3691414B2 (en) * 2001-07-05 2005-09-07 リンナイ株式会社 Hot water system
CN100436906C (en) * 2006-05-25 2008-11-26 张卫民 Starting water valve at normal and ultra-low pressure for gas water heater

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609162A1 (en) * 1986-12-24 1988-07-01 Commissariat Energie Atomique SUPERHEAT AND INCREASE CONTROL DEVICE FOR A HEATING APPARATUS FOR A FLUID AND APPARATUS EQUIPPED WITH SUCH A DEVICE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR84012E (en) * 1963-04-19 1964-11-13 Chaffoteaux Et Maury Improvements to hot water heating systems
FR1588501A (en) * 1968-06-28 1970-04-17
JPS60138353A (en) * 1983-12-26 1985-07-23 Paloma Ind Ltd Source stop type instantaneous gas water heater
US5447287A (en) * 1994-06-24 1995-09-05 Robertshaw Controls Company Fuel control device and methods of making the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609162A1 (en) * 1986-12-24 1988-07-01 Commissariat Energie Atomique SUPERHEAT AND INCREASE CONTROL DEVICE FOR A HEATING APPARATUS FOR A FLUID AND APPARATUS EQUIPPED WITH SUCH A DEVICE

Also Published As

Publication number Publication date
TW397914B (en) 2000-07-11
DE69803829D1 (en) 2002-03-21
CN1224142A (en) 1999-07-28
HK1019633A1 (en) 2000-02-18
TR199802600A2 (en) 1999-07-21
DZ2672A1 (en) 2003-03-22
DE69803829T2 (en) 2002-10-10
CN1110657C (en) 2003-06-04
BR9805792A (en) 1999-12-21
ES2172868T3 (en) 2002-10-01
TR199802600A3 (en) 1999-07-21
TNSN98226A1 (en) 2000-12-29
FR2772466B1 (en) 2000-02-18
MA24713A1 (en) 1999-07-01
EP0924466A1 (en) 1999-06-23
FR2772466A1 (en) 1999-06-18
AR017432A1 (en) 2001-09-05
PT924466E (en) 2002-07-31

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