EP1947384A1 - Mechanical assistance device for evacuating gas streams, more particularly intended for a residential unit - Google Patents

Mechanical assistance device for evacuating gas streams, more particularly intended for a residential unit Download PDF

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Publication number
EP1947384A1
EP1947384A1 EP08300032A EP08300032A EP1947384A1 EP 1947384 A1 EP1947384 A1 EP 1947384A1 EP 08300032 A EP08300032 A EP 08300032A EP 08300032 A EP08300032 A EP 08300032A EP 1947384 A1 EP1947384 A1 EP 1947384A1
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EP
European Patent Office
Prior art keywords
flow
assistance device
mechanical assistance
evacuation
combustion
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.)
Granted
Application number
EP08300032A
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German (de)
French (fr)
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EP1947384B1 (en
Inventor
Michel Bodin
Guy Urvoy
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SARL MVN
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SARL MVN
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Publication date
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Priority to EP11154891.3A priority Critical patent/EP2360433B1/en
Publication of EP1947384A1 publication Critical patent/EP1947384A1/en
Application granted granted Critical
Publication of EP1947384B1 publication Critical patent/EP1947384B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 
    • F23J11/02—Devices for conducting smoke or fumes, e.g. flues  for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 
    • F23J11/12—Smoke conduit systems for factories or large buildings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/16—Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/20—Common flues for several combustion devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/30—Chimney or flue associated with building ventilation system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/70—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
    • F24F7/00—Ventilation
    • F24F2007/001—Ventilation with exhausting air ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F2007/004—Natural ventilation using convection

Definitions

  • the present invention relates to a mechanical assistance device for the evacuation of gas flow more particularly intended for a habitable assembly.
  • a ventilation device for discharging stale air including at least one mouth at a room, a ventilation circuit connecting the at least one mouth to a motorized extraction system allowing suck the stale air and drive it back out of the house.
  • a ventilation device for discharging stale air including at least one mouth at a room, a ventilation circuit connecting the at least one mouth to a motorized extraction system allowing suck the stale air and drive it back out of the house.
  • VMC controlled mechanical ventilation.
  • the extraction system must maintain in the air flow a depression of the order of or greater than 125 Pa.
  • the houses When they are equipped with heating means generating products of combustion, the houses comprise means of evacuation of the products of combustion (fumes, burned gases, %) in addition to possible ventilation devices.
  • the evacuation of the products of combustion is by natural draft, the warmer products of combustion having a tendency to rise.
  • the building usually includes at least one chimney flue extending from bottom to top into which pipes connect to the heating appliances, the combustion products being pushed back into the flue in which they rise by natural convection.
  • the chimney duct may be of the shunt type and comprise at least one partition extending over substantially the entire height of the chimney duct and the splitter in at least one duct intended for the products of combustion and at least one conduit destined for stale air.
  • the chimney flue can be connected to a VMC-type mechanical extraction system intended to extract, on the one hand, the combustion products and, on the other hand, the stale air.
  • the VMC-type mechanical extraction system operates at a regime identical to that used for the extraction of stale air, namely with a depression of the order of or greater than 125 Pa.
  • a box is attached to the upper end of the flue, said box being divided into two compartments arranged in the extension, one of the duct dedicated to combustion products and the other of the duct dedicated to stale air.
  • Each compartment is connected via a pipe equipped with a damper to the same mechanical extraction system that can suck up and discharge into the atmosphere the combustion products and exhausted air.
  • the compartment for combustion products comprises a shutter grid provided with pivoting shutters capable of occupying a first position in which the gate is closed and a second position in which the gate is open allowing the products to be removed. natural draft combustion.
  • Maneuvering means are provided for pivoting the flaps, said operating means being controlled as soon as a pressure switch placed in the vacuum circuit detects an insufficient depression corresponding to an operating anomaly of the mechanical extraction system.
  • the present invention aims to improve the extraction of combustion products when the device operates in natural draft. According to another object, the invention aims to make the device of the prior art safer and simpler.
  • the subject of the invention is a mechanical assistance device for evacuating gaseous flows, comprising a fluidic network dedicated to the products of combustion of at least one apparatus disposed in a living room comprising means for venting to occupy a first closed state and a second open state to allow the escape of the combustion products by a natural draft, the venting means comprising at least one duct channeling the gas flow may to be closed off by at least one pivoting flap about an axis extending in a direction perpendicular to the flow direction of the gas flows, characterized in that said at least one flap has a wing profile and comprises a rounded leading edge and a tapered trailing edge, the flap section increasing at the leading edge flare to gradually decrease to the trailing edge.
  • FIG. 1 and 2 there is shown a building comprising a set of dwellings with different rooms 10.
  • a building comprising a set of dwellings with different rooms 10.
  • stale air is extracted from said rooms through an extraction system 12 generally placed on the roof terrace of the room. 'building.
  • An air flow circuit is provided for connecting the parts to the extraction system 12, said circuit opening into the parts 10 via air vents 14.
  • the ventilation system comprises a substantially vertical chimney duct 16 extending from the bottom to the top of the building, ducts connecting certain rooms 10 to the chimney duct, said ducts opening into the rooms via ducts. air vents 14, a box 18 captianteant the duct substantially sealed, at least one pipe 20 connecting the casing 18 to an extraction system 12.
  • the chimney duct 16 may comprise at least one partition dividing the chimney duct into several vertical ducts 16.1, 16.2 opening in the upper part in the caisson 18 which may or may not be compartmentalized (one compartment for each vertical duct), several conduits 20 (one for each compartment) for connecting said box 18 to the extraction system 12. Balancing registers 22 may be provided at the lines 20 to balance the flow rates between the different branches of the air flow.
  • Several boxes 18 each reported on a chimney can be connected to the same extraction system 12 in order to limit the number and reduce the cost of installation.
  • the building may include a system for extracting stale air and combustion products (fumes, flue gases, ..) generated by appliances 23, including gas-fired heating appliances.
  • a ventilation circuit is provided for substantially sealing the devices 23 to the extraction system 12, that used for the extraction of stale air.
  • the airflow circuit dedicated to the products of combustion comprises at the top part of the venting means, such that a shutter grid 24 with shutters 26, which can occupy two states, a first state, illustrated on the figure 3A , in which the gate is closed corresponding to the forced extraction mode of operation and a second state, illustrated on the figure 3B , in which the gate is open corresponding to the operating mode by natural draft.
  • a shutter grid 24 with shutters 26 which can occupy two states, a first state, illustrated on the figure 3A , in which the gate is closed corresponding to the forced extraction mode of operation and a second state, illustrated on the figure 3B , in which the gate is open corresponding to the operating mode by natural draft.
  • the device for ventilating and discharging the products of combustion comprises at least one shunt-type duct 16 with at least one partition separating said chimney duct into at least one first duct 16.1 intended for stale air and at least one a second conduit 16.2 for the products of combustion.
  • Pipes are provided for connecting certain parts 10 to the first duct 16.1, said ducts opening into the rooms via ventilation openings 14. Pipes are also provided for connecting the appliances 23 generating combustion products to the second duct 16.2 dedicated to the products. of combustion.
  • the flue 16 in particular the first and second ducts, opens into a box 18 provided in the upper part, said box comprising two compartments, a 18.1 dedicated to stale air in which opens the first conduit 16.1, the other 18.2 dedicated combustion products in which the second conduit 16.2. Adequate sealing means are provided between the casing 18 and the flue.
  • the box 18 comprises a partition to split it into two compartments.
  • a pipe 20 is provided for each compartment in order to connect them to the extraction system 12.
  • Balancing dampers 22 are preferably provided at the level of the pipes 20 to balance the flow rates between the different branches of the ventilation circuit.
  • several caissons 18 can be connected to the same extraction system 12.
  • the invention could be applied to a dwelling comprising at least one room to ventilate.
  • the closing gate 24 has a section greater than that of the second conduit 16.2 in order not to generate pressure losses likely to disturb the natural draft.
  • the flaps 26 are pivotally mounted along a substantially horizontal axis. They are likely to occupy a first position in which they are contiguous corresponding to the closed state of the grid and a second position in which after pivoting, they are non-contiguous and arranged in a substantially vertical position in order to pass the combustion products. and get a vent and a natural print.
  • all the flaps 26 are connected to a linkage 28 itself connected via a link 30 to a servomotor 32.
  • the output shaft of the servomotor is integral with the box and remains fixed while the pivoting servomotor is connected to the link 30.
  • the servomotor 32 pivots around its shaft (shown by the axis 34) in the clockwise direction to occupy the position illustrated on the figure 3A , corresponding to the closed state of the grid.
  • return means tend to cause the rotation of the servomotor about the axis 34 in the anti-clockwise direction to occupy the position illustrated in FIG. figure 3B corresponding to the open state of the grid.
  • the invention is not limited to these shutter operating means.
  • other means can be envisaged for putting the ventilation circuit intended for the products of combustion in the atmosphere, in operation by natural draft, in the event of a malfunction of the forced extraction system 12.
  • a static extractor 36 can be attached to the top of the compartment 18.2 at the outlet of the closing gate.
  • the aeraulic network dedicated to the products of combustion comprises means 38 for detecting the malfunction of the extraction system 12, illustrated in detail in FIGS. Figures 5 to 7 .
  • these detection means 38 make it possible to measure the speed of the flow (or the flow rate) in the aeration circuit dedicated to the combustion products and to transmit a signal when this speed falls below a predetermined threshold.
  • the speed (or flow) in the aunterlic circuit is a function of the depression generated by the extraction system 12.
  • This trigger threshold is of the order of 2 m / s for a section of the order of 0.08 m 2 .
  • the means 38 for measuring the speed are provided at the pipe 20 in the vicinity of the box, more particularly at the outlet of the box 18.
  • the means 38 for measuring the speed comprise a paddle 40 extending across the pipe 20, in the form of an aluminum disc, supported by a finger 42 connected to a controller 44.
  • the pallet is not necessarily flat and may be curved or comprise several planes.
  • the finger 42 is pivotally mounted along a substantially horizontal axis, perpendicular to the flow and occupies a determined stable position under the effect of the weight of the pallet in the absence of flow (substantially vertical). In the presence of a flow in the pipe 20, the pallet is pushed by this flow and causes the pivoting of the finger / pallet assembly which deviates from the stable position.
  • the pallet could be mounted on a pivot axis substantially horizontal and perpendicular to the flow.
  • the detection means according to the invention simple and reliable, allow to obtain a safe operation of the combustion products evacuation system.
  • the extraction means 12 have an operating regime which makes it possible to maintain a vacuum, measured in the casing 18, between 55 and 95 Pa in order to ensure a satisfactory evacuation of combustion products and stale air.
  • This operating range makes it possible to optimize the operation of the appliances 23 and to reduce the power required for extracting the stale air and thus the energy consumption of the installation.
  • the extraction system 12 makes it possible to maintain a depression measured in the box 18, of the order of 60 to 90 Pa and advantageously of the order of 80 to 85 Pa.
  • the extraction means are in the form of a box in which is disposed a double flat-hearted fan (low pressure difference over a wide range of flow as shown in FIG. figure 8 ).
  • the air circuit dedicated to stale air comprises specific air vents 14, one of which is illustrated in detail on the figure 4 .
  • the vent has a larger passage section and or lower pressure drops for a given flow.
  • aeration vents with low pressure drops are used.
  • An air vent 14 comprises a gate 46, a regulation module 48 preferably self-adjusting, a mouth body 50 and possibly a renovation plate 52.
  • the curves of the aeraulic characteristics of air vents allowing the device of the invention to function are represented on the figure 9 .
  • the curve 54 is representative of a vent provided for a large housing while the curve 56 is representative of a vent provided for a small housing, the intermediate curves being provided for intermediate housing.
  • the airflow circuit dedicated to the combustion products comprises at the top part venting means ensuring operation by natural draft.
  • the venting means comprise at least one duct 58, disposed in the extension of the chimney duct 18.2 dedicated to combustion products, channeling the gas flows in a substantially vertical direction, which can be closed by at least one flap 60 pivoting about an axis 62 extending in a direction perpendicular to the direction of flow of the gas stream.
  • the device of the invention provides a single flap 60 whose dimensions are adapted to those of the duct 58, pivotable along an axis 62 perpendicular to the direction of flow of the gas stream. So, as illustrated on the figure 11 when the device is in the off state corresponding to a forced extraction operation, the flap 60 is arranged to close the duct 58 substantially horizontally. When the device is in the on state corresponding to a natural draft operation, the flap 60 is arranged vertically in the duct so as to let the gas flows.
  • the axis 62 is disposed in the vertical median plane of the duct so that the flap 60 splits the duct 58 into two half conduits 58.1 and 58.2 of identical sections when in the tilted position as shown in FIG. figure 10 .
  • This solution makes it possible to balance the flows on either side of the flap 60 when the device is in the on state.
  • a stop 63 makes it possible to limit the rotation of the shutter 60 about the axis 62 and to immobilize it in a vertical position.
  • a motorization 64 placed in the extension of the axis 62 in a compartment 66 joined to the duct 58, makes it possible to drive the axis 62 in rotation in order to tilt the shutter 60.
  • the flap has a wing profile and comprises, according to the direction of flow of the air, a rounded leading edge 68 and a tapered trailing edge 70, the section of the flap 60 increasing. at the level of the rounding of the leading edge 68 to gradually decrease to the trailing edge 70.
  • the shutter has a height H of the order of 270 mm, a rounded at the leading edge 68 with a radius of curvature of the order of 5 mm and a maximum thickness e of the order of 10 mm.
  • This shutter profile allows better extraction because it increases the cross section and reduces pressure losses.
  • this shutter profile makes it possible to have in the passing state two ducts 58.1 and 58.2 in the form of a venturi tube making it possible to obtain, at the level of the most important section of the shutter, an increase in the speed of extraction of the gas flow and a decrease of pressure which improves the natural draft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Architecture (AREA)
  • Ventilation (AREA)
  • Incineration Of Waste (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The device has a gas heating apparatus placed in a habitable room, where the room includes a venting unit occupying a closed state and an open state to allow exhaust of combustion products e.g. waste gas, by natural pulling. The unit includes a conduit (58) canalizing gas flow closed by a shutter (60), where the shutter pivots around an axis (62) extending perpendicular to a gas flow direction. The shutter includes a wing section, which increases at a rounded leading edge (68) and decreases at a trailing edge (70).

Description

La présente invention se rapporte à un dispositif d'assistance mécanique pour l'évacuation de flux gazeux plus particulièrement destiné à un ensemble habitable.The present invention relates to a mechanical assistance device for the evacuation of gas flow more particularly intended for a habitable assembly.

Généralement, les habitations sont équipées d'un dispositif de ventilation permettant d'évacuer l'air vicié comprenant au moins une bouche au niveau d'une pièce, un circuit aéraulique reliant ladite au moins une bouche à un système d'extraction motorisé permettant d'aspirer l'air vicié et de le refouler à l'extérieur de l'habitation. Un tel dispositif est largement répandu et connu par l'homme du métier sous l'acronyme VMC ou ventilation mécanique contrôlée. Pour assurer une ventilation satisfaisante, le système d'extraction doit maintenir dans le circuit aéraulique une dépression de l'ordre de ou supérieure à 125 Pa.Generally, homes are equipped with a ventilation device for discharging stale air including at least one mouth at a room, a ventilation circuit connecting the at least one mouth to a motorized extraction system allowing suck the stale air and drive it back out of the house. Such a device is widely used and known to those skilled in the art under the acronym VMC or controlled mechanical ventilation. To ensure satisfactory ventilation, the extraction system must maintain in the air flow a depression of the order of or greater than 125 Pa.

Lorsqu'elles sont équipées de moyens de chauffage générant des produits de combustion, les habitations comprennent des moyens d'évacuation des produits de combustion (fumées, gaz brûlés,...) en plus des éventuels dispositifs de ventilation.When they are equipped with heating means generating products of combustion, the houses comprise means of evacuation of the products of combustion (fumes, burned gases, ...) in addition to possible ventilation devices.

Selon un mode de fonctionnement, l'évacuation des produits de combustion se fait par tirage naturel, les produits de combustion plus chauds ayant tendance à s'élever. Dans le cas d'un immeuble, ce dernier comprend généralement au moins un conduit de cheminée s'étendant de bas en haut dans lequel débouchent des canalisations reliées aux appareils de chauffage, les produits de combustion étant refoulés dans le conduit de cheminée dans lequel ils s'élèvent par convection naturelle.According to one mode of operation, the evacuation of the products of combustion is by natural draft, the warmer products of combustion having a tendency to rise. In the case of a building, the building usually includes at least one chimney flue extending from bottom to top into which pipes connect to the heating appliances, the combustion products being pushed back into the flue in which they rise by natural convection.

Selon un mode de réalisation, le conduit de cheminée peut être de type shunt et comprendre au moins une cloison s'étendant sur sensiblement toute la hauteur du conduit de cheminée et le scindant en au moins un conduit destiné aux produits de combustion et au moins un conduit destiné à l'air vicié.According to one embodiment, the chimney duct may be of the shunt type and comprise at least one partition extending over substantially the entire height of the chimney duct and the splitter in at least one duct intended for the products of combustion and at least one conduit destined for stale air.

Selon certaines réalisations, le conduit de cheminée peut être relié à un système d'extraction mécanique de type VMC visant à extraire d'une part les produits de combustion, et d'autre part, l'air vicié. Dans ce cas, le système d'extraction mécanique de type VMC fonctionne à un régime identique à celui utilisé pour l'extraction de l'air vicié à savoir avec une dépression de l'ordre de ou supérieure à 125 Pa.According to some embodiments, the chimney flue can be connected to a VMC-type mechanical extraction system intended to extract, on the one hand, the combustion products and, on the other hand, the stale air. In this case, the VMC-type mechanical extraction system operates at a regime identical to that used for the extraction of stale air, namely with a depression of the order of or greater than 125 Pa.

Dans ce cas et conformément à la législation, en cas de panne du système d'extraction, le fonctionnement des appareils à combustion doit être automatiquement arrêté.In this case and according to the legislation, in case of failure of the extraction system, the operation of the combustion devices must be automatically stopped.

Pour éviter un tel arrêt général et automatique, tout en procédant à une extraction forcée des produits de combustion, une solution a été développée et décrite dans le document FR-2.785.977 .To avoid such a general and automatic shutdown, while carrying out a forced extraction of the products of combustion, a solution has been developed and described in the document FR-2785977 .

Selon ce document, un caisson est rapporté à l'extrémité supérieure du conduit de cheminée, ledit caisson étant divisé en deux compartiments disposés dans le prolongement, l'un du conduit dédié aux produits de combustion et l'autre du conduit dédié à l'air vicié. Chaque compartiment est raccordé par l'intermédiaire d'une conduite équipée d'un registre au même système d'extraction mécanique susceptible d'aspirer et de rejeter dans l'atmosphère les produits de combustion et l'air vicié aspirés. Le compartiment dédié aux produits de combustion comprend une grille d'obturation munie de volets pivotants susceptibles d'occuper une première position dans laquelle la grille est obturée et une seconde position dans laquelle la grille est ouverte permettant d'évacuer les produits de combustion par tirage naturel. Des moyens de manoeuvre sont prévus pour pivoter les volets, lesdits moyens de manoeuvre étant commandés dès qu'un pressostat placé dans le circuit de dépression détecte une dépression insuffisante correspondant à une anomalie de fonctionnement du système d'extraction mécanique.According to this document, a box is attached to the upper end of the flue, said box being divided into two compartments arranged in the extension, one of the duct dedicated to combustion products and the other of the duct dedicated to stale air. Each compartment is connected via a pipe equipped with a damper to the same mechanical extraction system that can suck up and discharge into the atmosphere the combustion products and exhausted air. The compartment for combustion products comprises a shutter grid provided with pivoting shutters capable of occupying a first position in which the gate is closed and a second position in which the gate is open allowing the products to be removed. natural draft combustion. Maneuvering means are provided for pivoting the flaps, said operating means being controlled as soon as a pressure switch placed in the vacuum circuit detects an insufficient depression corresponding to an operating anomaly of the mechanical extraction system.

Ainsi, il n'est plus nécessaire d'arrêter les appareils à combustion lorsque le système d'extraction mécanique ne fonctionne plus de manière satisfaisante. En effet, dès que la pression mesurée par le pressostat descend en dessous d'un certain seuil, les volets sont manoeuvrés afin de mettre à l'atmosphère le conduit dédié aux produits de combustion et obtenir un tirage naturel.Thus, it is no longer necessary to stop the combustion apparatus when the mechanical extraction system is no longer functioning satisfactorily. Indeed, as soon as the pressure measured by the pressure switch falls below a certain threshold, the flaps are operated in order to vent the duct dedicated to combustion products and obtain a natural draft.

La présente invention vise à améliorer l'extraction des produits de combustion lorsque le dispositif fonctionne en tirage naturel. Selon un autre objectif, l'invention vise à rendre le dispositif de l'art antérieur plus sûr et plus simple.The present invention aims to improve the extraction of combustion products when the device operates in natural draft. According to another object, the invention aims to make the device of the prior art safer and simpler.

A cet effet, l'invention a pour objet un dispositif d'assistance mécanique pour l'évacuation de flux gazeux, comprenant un réseau fluidique dédié aux produits de combustion d'au moins un appareil disposé dans une pièce d'habitation comprenant des moyens de mise à l'atmosphère susceptible d'occuper un premier état fermé et un second état ouvert pour permettre l'échappement des produits de combustion par un tirage naturel, les moyens de mise à l'atmosphère comprenant au moins un conduit canalisant les flux gazeux susceptible d'être obturé par au moins un volet pivotant autour d'un axe s'étendant selon une direction perpendiculaire à la direction d'écoulement des flux gazeux, caractérisé en ce que ledit au moins un volet a un profil d'aile et comprend un bord d'attaque arrondi et un bord de fuite effilé, la section du volet augmentant au niveau de l'arrondi du bord d'attaque pour diminuer progressivement jusqu'au bord de fuite.For this purpose, the subject of the invention is a mechanical assistance device for evacuating gaseous flows, comprising a fluidic network dedicated to the products of combustion of at least one apparatus disposed in a living room comprising means for venting to occupy a first closed state and a second open state to allow the escape of the combustion products by a natural draft, the venting means comprising at least one duct channeling the gas flow may to be closed off by at least one pivoting flap about an axis extending in a direction perpendicular to the flow direction of the gas flows, characterized in that said at least one flap has a wing profile and comprises a rounded leading edge and a tapered trailing edge, the flap section increasing at the leading edge flare to gradually decrease to the trailing edge.

D'autres caractéristiques et avantages ressortiront de la description qui va suivre de l'invention, description donnée à titre d'exemple uniquement, en regard des dessins annexés sur lesquels :

  • la figure 1 est une représentation schématique d'un dispositif d'assistance mécanique pour l'extraction de flux gazeux appliqué à la ventilation d'un immeuble,
  • la figure 2 est une représentation schématique d'un dispositif d'assistance mécanique pour l'extraction de flux gazeux appliqué à la ventilation et à l'extraction des produits de combustion d'un immeuble,
  • la figure 3A est une coupe d'un caisson selon l'invention, rapporté à l'extrémité supérieure d'un conduit, illustrant le fonctionnement par extraction forcée,
  • la figure 3B est une coupe d'un caisson selon l'invention, rapporté à l'extrémité supérieure d'un conduit, illustrant le fonctionnement par tirage naturel,
  • la figure 4 est une représentation d'une bouche d'aération plus particulièrement adaptée pour le dispositif de l'invention,
  • la figure 5 est une vue illustrant de manière éclatée des moyens de détection d'un dysfonctionnement permettant de déclencher la mise à l'atmosphère et obtenir un fonctionnement par tirage naturel,
  • la figure 6 est une vue de face illustrant les moyens de détection de la figure 5,
  • la figure 7 est une vue latérale illustrant les moyens de détection de la figure 5,
  • la figure 8 représente des courbes de caractéristiques aérauliques d'un système d'extraction,
  • la figure 9 représente des courbes de caractéristiques aérauliques de différentes bouches d'aération,
  • - la figure 10 est une vue illustrant une variante de réalisation d'un caisson chapeautant un conduit d'évacuation des produits de combustion à l'état passant correspondant à l'extraction par tirage naturel, et
  • La figure 11 est une vue du caisson de la figure 10 à l'état non passant correspondant à l'extraction forcée.
Other features and advantages will become apparent from the following description of the invention, a description given by way of example only, with reference to the appended drawings in which:
  • the figure 1 is a schematic representation of a mechanical assistance device for the extraction of gaseous flow applied to the ventilation of a building,
  • the figure 2 is a schematic representation of a mechanical assistance device for the extraction of gas flow applied to the ventilation and extraction of the combustion products of a building,
  • the figure 3A is a section of a box according to the invention, attached to the upper end of a duct, illustrating the operation by forced extraction,
  • the figure 3B is a section of a box according to the invention, attached to the upper end of a pipe, illustrating the operation by natural draft,
  • the figure 4 is a representation of a ventilation opening more particularly adapted for the device of the invention,
  • the figure 5 is a view exploding exploded means of detecting a malfunction to trigger the venting and obtain operation by natural draft,
  • the figure 6 is a front view illustrating the detection means of the figure 5 ,
  • the figure 7 is a side view illustrating the detection means of the figure 5 ,
  • the figure 8 represents airflow characteristic curves of an extraction system,
  • the figure 9 represents aeraulic characteristic curves of different air vents,
  • - the figure 10 is a view illustrating an alternative embodiment of a box captaining an exhaust duct of the combustion products in the on state corresponding to the extraction by natural draft, and
  • The figure 11 is a view of the caisson of the figure 10 in the off state corresponding to the forced extraction.

Sur les figures 1 et 2, on a représenté un immeuble comprenant un ensemble d'habitations avec différentes pièces 10. Pour favoriser la ventilation de certaines pièces, l'air vicié est extrait desdites pièces grâce à un système d'extraction 12 placé généralement sur le toit en terrasse de l'immeuble. Un circuit aéraulique est prévu pour relier les pièces au système d'extraction 12, ledit circuit débouchant dans les pièces 10 via des bouches d'aération 14.On the Figures 1 and 2 , there is shown a building comprising a set of dwellings with different rooms 10. To promote the ventilation of certain rooms, stale air is extracted from said rooms through an extraction system 12 generally placed on the roof terrace of the room. 'building. An air flow circuit is provided for connecting the parts to the extraction system 12, said circuit opening into the parts 10 via air vents 14.

Selon un mode de réalisation, le système de ventilation comprend un conduit de cheminée 16 sensiblement vertical, s'étendant de bas en haut de l'immeuble, des conduites reliant certaines pièces 10 au conduit de cheminée, lesdites conduites débouchant dans les pièces via des bouches d'aération 14, un caisson 18 chapeautant le conduit de cheminée de manière sensiblement étanche, au moins une conduite 20 reliant le caisson 18 à un système d'extraction 12.According to one embodiment, the ventilation system comprises a substantially vertical chimney duct 16 extending from the bottom to the top of the building, ducts connecting certain rooms 10 to the chimney duct, said ducts opening into the rooms via ducts. air vents 14, a box 18 captianteant the duct substantially sealed, at least one pipe 20 connecting the casing 18 to an extraction system 12.

En variante, le conduit de cheminée 16 peut comprendre au moins une cloison scindant le conduit de cheminée en plusieurs conduits 16.1, 16.2 verticaux débouchant en partie supérieure dans le caisson 18 qui peut être ou non compartimenté (un compartiment pour chaque conduit vertical), plusieurs conduites 20 (une pour chaque compartiment ) permettant de relier ledit caisson 18 au système d'extraction 12. Des registres d'équilibrage 22 peuvent être prévus au niveau des conduites 20 pour équilibrer les débits entre les différentes branches du circuit aéraulique. Plusieurs caissons 18 rapportés chacun sur un conduit de cheminée, peuvent être reliés au même système d'extraction 12 afin d'en limiter le nombre et réduire le coût de l'installation.Alternatively, the chimney duct 16 may comprise at least one partition dividing the chimney duct into several vertical ducts 16.1, 16.2 opening in the upper part in the caisson 18 which may or may not be compartmentalized (one compartment for each vertical duct), several conduits 20 (one for each compartment) for connecting said box 18 to the extraction system 12. Balancing registers 22 may be provided at the lines 20 to balance the flow rates between the different branches of the air flow. Several boxes 18 each reported on a chimney, can be connected to the same extraction system 12 in order to limit the number and reduce the cost of installation.

Selon d'autres installations dont une est représentée sur la figure 2, l'immeuble peut comprendre un système pour l'extraction de l'air vicié et des produits de combustion (fumées, gaz brûlés,..) générés par des appareils 23, notamment des appareils de chauffage fonctionnant au gaz. Ainsi, un circuit aéraulique est prévu pour relier de manière sensiblement étanche les appareils 23 au système d'extraction 12, celui utilisé pour l'extraction de l'air vicié. Pour empêcher l'arrêt automatique des appareils générant des produits de combustion, notamment lors d'un dysfonctionnement du système d'extraction 12, le circuit aéraulique dédié aux produits de combustion comprend en partie haute des moyens de mise à l'atmosphère, telle qu'une grille d'obturation 24 avec des volets 26, susceptibles d'occuper deux états, un premier état, illustré sur la figure 3A, dans lequel la grille est fermée correspondant au mode de fonctionnement par extraction forcée et un second état, illustré sur la figure 3B, dans lequel la grille est ouverte correspondant au mode de fonctionnement par tirage naturel. Ainsi, il n'est plus nécessaire d'arrêter de manière automatique tous les appareils 23 générant des produits de combustion. En effet, en cas de dysfonctionnement du système d'extraction 12, l'ouverture de la grille 24 permet d'obtenir une évacuation des produits de combustion par tirage naturel.According to other facilities, one of which is represented on the figure 2 , the building may include a system for extracting stale air and combustion products (fumes, flue gases, ..) generated by appliances 23, including gas-fired heating appliances. Thus, a ventilation circuit is provided for substantially sealing the devices 23 to the extraction system 12, that used for the extraction of stale air. To prevent the automatic shutdown of the apparatus generating combustion products, in particular during a malfunction of the extraction system 12, the airflow circuit dedicated to the products of combustion comprises at the top part of the venting means, such that a shutter grid 24 with shutters 26, which can occupy two states, a first state, illustrated on the figure 3A , in which the gate is closed corresponding to the forced extraction mode of operation and a second state, illustrated on the figure 3B , in which the gate is open corresponding to the operating mode by natural draft. Thus, it is no longer necessary to automatically stop all devices 23 generating combustion products. Indeed, in case of malfunction of the extraction system 12, the opening of the gate 24 provides for evacuation of combustion products by natural draft.

Selon un mode de réalisation illustré sur la figure 2, le dispositif de ventilation et d'évacuation des produits de combustion comprend au moins un conduit de cheminée 16 de type shunt avec au moins une cloison scindant ledit conduit de cheminée en au moins un premier conduit 16.1 destiné à l'air vicié et au moins un second conduit 16.2 destiné aux produits de combustion.According to an embodiment illustrated on the figure 2 the device for ventilating and discharging the products of combustion comprises at least one shunt-type duct 16 with at least one partition separating said chimney duct into at least one first duct 16.1 intended for stale air and at least one a second conduit 16.2 for the products of combustion.

Des conduites sont prévues pour relier certaines pièces 10 au premier conduit 16.1, lesdites conduites débouchant dans les pièces via des bouches d'aération 14. Des conduites sont également prévues pour relier les appareils 23 générant des produits de combustion au second conduit 16.2 dédié aux produits de combustion.Pipes are provided for connecting certain parts 10 to the first duct 16.1, said ducts opening into the rooms via ventilation openings 14. Pipes are also provided for connecting the appliances 23 generating combustion products to the second duct 16.2 dedicated to the products. of combustion.

Le conduit de cheminée 16, notamment les premier et second conduits, débouche dans un caisson 18 prévu en partie supérieure, ledit caisson comprenant deux compartiments, un 18.1 dédié à l'air vicié dans lequel débouche le premier conduit 16.1, l'autre 18.2 dédié aux produits de combustion dans lequel débouche le second conduit 16.2. Des moyens d'étanchéité adéquats sont prévus entre le caisson 18 et le conduit de cheminée.The flue 16, in particular the first and second ducts, opens into a box 18 provided in the upper part, said box comprising two compartments, a 18.1 dedicated to stale air in which opens the first conduit 16.1, the other 18.2 dedicated combustion products in which the second conduit 16.2. Adequate sealing means are provided between the casing 18 and the flue.

Selon un mode de réalisation, le caisson 18 comprend une cloison pour le scinder en deux compartiments. Une conduite 20 est prévue pour chaque compartiment afin de les relier au système d'extraction 12. Des registres d'équilibrage 22 sont de préférence prévus au niveau des conduites 20 pour équilibrer les débits entre les différentes branches du circuit aéraulique. Selon les besoins, plusieurs caissons 18 peuvent être reliés au même système d'extraction 12.According to one embodiment, the box 18 comprises a partition to split it into two compartments. A pipe 20 is provided for each compartment in order to connect them to the extraction system 12. Balancing dampers 22 are preferably provided at the level of the pipes 20 to balance the flow rates between the different branches of the ventilation circuit. Depending on the needs, several caissons 18 can be connected to the same extraction system 12.

Bien que décrite appliquée à un ensemble d'habitations, l'invention pourrait être appliquée à une habitation comprenant au moins une pièce à ventiler.Although described applied to a set of dwellings, the invention could be applied to a dwelling comprising at least one room to ventilate.

Selon un mode de réalisation illustré sur les figures 3A et 3B, la grille d'obturation 24 a une section supérieure à celle du second conduit 16.2 afin de ne pas générer de pertes de charge susceptibles de perturber le tirage naturel.According to an embodiment illustrated on the Figures 3A and 3B , the closing gate 24 has a section greater than that of the second conduit 16.2 in order not to generate pressure losses likely to disturb the natural draft.

Elle est disposée en partie supérieure du compartiment 18.2. Les volets 26 sont montés pivotant selon un axe sensiblement horizontal. Ils sont susceptibles d'occuper une première position dans laquelle ils sont jointifs correspondant à l'état fermé de la grille et une seconde position dans laquelle après pivotement, ils sont non jointifs et disposés en position sensiblement verticale afin de laisser passer les produits de combustion et obtenir une mise à l'atmosphère et un tirage naturel.It is arranged in the upper part of the compartment 18.2. The flaps 26 are pivotally mounted along a substantially horizontal axis. They are likely to occupy a first position in which they are contiguous corresponding to the closed state of the grid and a second position in which after pivoting, they are non-contiguous and arranged in a substantially vertical position in order to pass the combustion products. and get a vent and a natural print.

Des moyens de manoeuvre sont prévus pour commander le pivotement des volets. Afin de rendre le déclenchement de l'ouverture plus sûr, des moyens de rappel tel qu'un ressort, tendent à maintenir les volets pivotés correspondant à l'état ouvert de la grille, un servomoteur tendant à s'opposer aux moyens de rappel et à maintenir les volets jointifs correspondant à l'état fermé de la grille lorsqu'il est soumis à une tension.Maneuvering means are provided to control the pivoting of the flaps. In order to make the initiation of the opening safer, return means such as a spring, tend to maintain the pivoted flaps corresponding to the open state of the gate, a servomotor tending to oppose the return means and at maintain the flaps corresponding to the closed state of the grid when subjected to tension.

Selon un mode de réalisation, illustré sur les figures 3A et 3B, tous les volets 26 sont reliés à une tringlerie 28 elle-même reliée par l'intermédiaire d'une biellette 30 à un servomoteur 32. Avantageusement, l'arbre de sortie du servomoteur est solidaire du caisson et reste fixe alors que le servomoteur pivotant est relié à la biellette 30. Ainsi, lorsque le servomoteur 32 est soumis à une tension électrique, il pivote autour de son arbre (matérialisé par l'axe 34) selon le sens horaire pour occuper la position illustrée sur la figure 3A, correspondant à l'état fermé de la grille. Lorsqu'il n'est pas soumis à une tension, des moyens de rappel tendent à provoquer la rotation du servomoteur autour de l'axe 34 dans le sens anti horaire pour occuper la position illustrée sur la figure 3B correspondant à l'état ouvert de la grille.According to one embodiment, illustrated on the Figures 3A and 3B , all the flaps 26 are connected to a linkage 28 itself connected via a link 30 to a servomotor 32. Advantageously, the output shaft of the servomotor is integral with the box and remains fixed while the pivoting servomotor is connected to the link 30. Thus, when the servomotor 32 is subjected to an electrical voltage, it pivots around its shaft (shown by the axis 34) in the clockwise direction to occupy the position illustrated on the figure 3A , corresponding to the closed state of the grid. When not subjected to a voltage, return means tend to cause the rotation of the servomotor about the axis 34 in the anti-clockwise direction to occupy the position illustrated in FIG. figure 3B corresponding to the open state of the grid.

Cependant, l'invention n'est pas limitée à ces moyens de manoeuvre des volets. De même, d'autres moyens peuvent être envisagés pour mettre le circuit aéraulique destiné aux produits de combustion à l'atmosphère, en fonctionnement par tirage naturel, en cas de dysfonctionnement du système d'extraction forcée 12.However, the invention is not limited to these shutter operating means. Likewise, other means can be envisaged for putting the ventilation circuit intended for the products of combustion in the atmosphere, in operation by natural draft, in the event of a malfunction of the forced extraction system 12.

Comme illustré sur les figures, un extracteur statique 36 peut être rapporté au dessus du compartiment 18.2 en sortie de la grille d'obturation.As illustrated in the figures, a static extractor 36 can be attached to the top of the compartment 18.2 at the outlet of the closing gate.

Selon l'invention, le réseau aéraulique dédié aux produits de combustion comprend des moyens 38 pour détecter le dysfonctionnement du système d'extraction 12, illustrés en détails sur les figures 5 à 7.According to the invention, the aeraulic network dedicated to the products of combustion comprises means 38 for detecting the malfunction of the extraction system 12, illustrated in detail in FIGS. Figures 5 to 7 .

Selon l'invention, ces moyens de détection 38 permettent de mesurer la vitesse de l'écoulement (ou le débit) dans le circuit aéraulique dédié aux produits de combustion et de transmettre un signal lorsque cette vitesse descend en dessous d'un seuil prédéterminé. En effet, la vitesse (ou le débit) dans le circuit aéraulique est fonction de la dépression générée par le système d'extraction 12. Ainsi, lorsque la dépression générée dans le circuit aéraulique n'est pas suffisante pour évacuer les produits de combustion, la vitesse (ou le débit) mesurée par les moyens de détection descend en dessous d'un seuil prédéterminé. Ce seuil de déclenchement est de l'ordre de 2 m/s pour une section de l'ordre de 0,08 m2.According to the invention, these detection means 38 make it possible to measure the speed of the flow (or the flow rate) in the aeration circuit dedicated to the combustion products and to transmit a signal when this speed falls below a predetermined threshold. Indeed, the speed (or flow) in the aeraulic circuit is a function of the depression generated by the extraction system 12. Thus, when the depression generated in the ventilation circuit is not sufficient to evacuate the products of combustion, the speed (or flow) measured by the detection means falls below a predetermined threshold. This trigger threshold is of the order of 2 m / s for a section of the order of 0.08 m 2 .

De préférence, les moyens 38 de mesure de la vitesse sont prévus au niveau de la conduite 20 à proximité du caisson, plus particulièrement en sortie du caisson 18. Les moyens 38 de mesure de la vitesse comprennent une palette 40 s'étendant en travers de la conduite 20, sous forme d'un disque d'aluminium, supportée par un doigt 42 relié à un contrôleur 44. La palette n'est pas forcément plane et peut être courbe ou comprendre plusieurs plans.Preferably, the means 38 for measuring the speed are provided at the pipe 20 in the vicinity of the box, more particularly at the outlet of the box 18. The means 38 for measuring the speed comprise a paddle 40 extending across the pipe 20, in the form of an aluminum disc, supported by a finger 42 connected to a controller 44. The pallet is not necessarily flat and may be curved or comprise several planes.

Le doigt 42 est monté pivotant selon un axe sensiblement horizontal, perpendiculaire à l'écoulement et occupe une position déterminée stable sous l'effet du poids de la palette en l'absence d'écoulement (sensiblement verticale). En présence d'un écoulement dans la conduite 20, la palette est poussée par cet écoulement et provoque le pivotement de l'ensemble doigt/palette qui s'écarte de la position stable. En variante, la palette pourrait être montée sur un axe de pivotement sensiblement horizontal et perpendiculaire à l'écoulement.The finger 42 is pivotally mounted along a substantially horizontal axis, perpendicular to the flow and occupies a determined stable position under the effect of the weight of the pallet in the absence of flow (substantially vertical). In the presence of a flow in the pipe 20, the pallet is pushed by this flow and causes the pivoting of the finger / pallet assembly which deviates from the stable position. Alternatively, the pallet could be mounted on a pivot axis substantially horizontal and perpendicular to the flow.

Le fonctionnement des moyens de détection est maintenant décrit. En fonctionnement «normal» lorsque le système d'extraction génère une dépression suffisante, l'écoulement dans la conduite 20 maintient la palette 40 en position pivotée à l'encontre de son propre poids. Lorsque le débit ou la vitesse de l'écoulement dans la conduite 20 descend en dessous d'un certain seuil, notamment lorsque la dépression générée par le système d'extraction 12 n'est pas suffisante pour évacuer les produits de combustion, alors la palette se rapproche de la position stable (correspondant à l'absence d'écoulement). Ainsi, lorsque l'écart angulaire entre la position occupée par la palette et la position stable est inférieur à un seuil déterminé (correspondant à une vitesse d'écoulement de l'ordre de 2 m/s pour une section de l'ordre de 0,08 m2), le contrôleur 44 transmet un signal qui déclenche la mise à l'atmosphère et dans le cas présent l'ouverture de la grille 24.The operation of the detection means is now described. In "normal" operation when the extraction system generates a sufficient vacuum, the flow in the pipe 20 keeps the pallet 40 in the rotated position against its own weight. When the flow rate or the speed of the flow in the pipe 20 falls below a certain threshold, especially when the depression generated by the extraction system 12 is not sufficient to evacuate the products of combustion, then the pallet is close to the stable position (corresponding to the absence of flow). Thus, when the angular difference between the position occupied by the pallet and the stable position is less than a determined threshold (corresponding to a flow rate of the order of 2 m / s for a section of the order of 0 , 08 m 2 ), the controller 44 transmits a signal that triggers the venting and in this case the opening of the gate 24.

Les moyens de détection selon l'invention, simples et fiables, permettent d'obtenir un fonctionnement sûr du système d'évacuation des produits de combustion.The detection means according to the invention, simple and reliable, allow to obtain a safe operation of the combustion products evacuation system.

Selon une caractéristique importante de l'invention, les moyens d'extraction 12 ont un régime de fonctionnement permettant de maintenir dans le circuit aéraulique une dépression, mesurée dans le caisson 18, comprise entre 55 et 95 Pa afin d'assurer une évacuation satisfaisante des produits de combustion et de l'air vicié. Cette plage de fonctionnement permet d'optimiser le fonctionnement des appareils 23 et de réduire la puissance nécessaire pour l'extraction de l'air vicié et donc la consommation énergétique de l'installation.According to an important characteristic of the invention, the extraction means 12 have an operating regime which makes it possible to maintain a vacuum, measured in the casing 18, between 55 and 95 Pa in order to ensure a satisfactory evacuation of combustion products and stale air. This operating range makes it possible to optimize the operation of the appliances 23 and to reduce the power required for extracting the stale air and thus the energy consumption of the installation.

Même en l'absence de produits de combustion à évacuer comme illustré sur la figure 1, on utilise un régime de fonctionnement sensiblement identique afin de rendre le dispositif polyvalent.Even in the absence of combustion products to evacuate as shown on the figure 1 , a substantially identical operating regime is used to make the device versatile.

De préférence, le système d'extraction 12 permet de maintenir une dépression mesurée dans le caisson 18, de l'ordre de 60 à 90 Pa et avantageusement de l'ordre de 80 à 85 Pa.Preferably, the extraction system 12 makes it possible to maintain a depression measured in the box 18, of the order of 60 to 90 Pa and advantageously of the order of 80 to 85 Pa.

Selon un mode de réalisation préféré, les moyens d'extraction se présentent sous la forme d'un caisson dans lequel est disposé un ventilateur double ouïe à courbe plate (faible différence de pression sur une plage large de débit comme illustré sur la figure 8).According to a preferred embodiment, the extraction means are in the form of a box in which is disposed a double flat-hearted fan (low pressure difference over a wide range of flow as shown in FIG. figure 8 ).

Pour obtenir un fonctionnement satisfaisant de la ventilation, le circuit aéraulique dédié à l'air vicié comprend des bouches d'aération 14 spécifiques dont une est illustrée en détails sur la figure 4. Selon l'invention, par rapport aux bouches de l'art antérieur, la bouche d'aération a une section de passage plus importante et ou des pertes de charge inférieures pour un débit donné. De préférence, on utilise des bouches d'aération à faibles pertes de charge.To obtain a satisfactory operation of the ventilation, the air circuit dedicated to stale air comprises specific air vents 14, one of which is illustrated in detail on the figure 4 . According to the invention, compared to the mouths of the prior art, the vent has a larger passage section and or lower pressure drops for a given flow. Preferably, aeration vents with low pressure drops are used.

Une bouche d'aération 14 comprend une grille 46, un module de régulation 48 de préférence auto-réglable, un corps de bouche 50 et éventuellement une platine de rénovation 52.An air vent 14 comprises a gate 46, a regulation module 48 preferably self-adjusting, a mouth body 50 and possibly a renovation plate 52.

A titre d'exemple, les courbes des caractéristiques aérauliques de bouches d'aération permettant au dispositif de l'invention de fonctionner sont représentées sur la figure 9. La courbe 54 est représentative d'une bouche d'aération prévue pour un grand logement alors que la courbe 56 est représentative d'une bouche d'aération prévue pour un petit logement, les courbes intermédiaires étant prévues pour des logements intermédiaires.By way of example, the curves of the aeraulic characteristics of air vents allowing the device of the invention to function are represented on the figure 9 . The curve 54 is representative of a vent provided for a large housing while the curve 56 is representative of a vent provided for a small housing, the intermediate curves being provided for intermediate housing.

Lorsque le dispositif est prévu pour des produits de combustion, le circuit aéraulique dédié aux produits de combustion comprend en partie haute des moyens de mise à l'atmosphère assurant un fonctionnement par tirage naturel.When the device is intended for combustion products, the airflow circuit dedicated to the combustion products comprises at the top part venting means ensuring operation by natural draft.

Selon un mode de réalisation illustré sur les figures 10 et 11, les moyens de mise à l'atmosphère comprennent au moins un conduit 58, disposé dans le prolongement du conduit de cheminée 18.2 dédié aux produits de combustion, canalisant les flux gazeux selon une direction sensiblement verticale, susceptible d'être obturé par au moins un volet 60 pivotant autour d'un axe 62 s'étendant selon une direction perpendiculaire à la direction d'écoulement des flux gazeux.According to an embodiment illustrated on the Figures 10 and 11 , the venting means comprise at least one duct 58, disposed in the extension of the chimney duct 18.2 dedicated to combustion products, channeling the gas flows in a substantially vertical direction, which can be closed by at least one flap 60 pivoting about an axis 62 extending in a direction perpendicular to the direction of flow of the gas stream.

De préférence, le dispositif de l'invention prévoit un seul volet 60 dont les dimensions sont adaptées à celles du conduit 58, susceptible de pivoter selon un axe 62 perpendiculaire à la direction d'écoulement des flux gazeux. Ainsi, comme illustré sur la figure 11, lorsque le dispositif est à l'état non passant correspondant à un fonctionnement par extraction forcée, le volet 60 est disposé de manière à obturer le conduit 58, sensiblement à l'horizontale. Lorsque le dispositif est à l'état passant correspondant à un fonctionnement par tirage naturel, le volet 60 est disposé verticalement dans le conduit de manière à laisser passer les flux gazeux. De préférence, l'axe 62 est disposé dans le plan médian vertical du conduit afin que le volet 60 scinde le conduit 58 en deux demi conduits 58.1 et 58.2 de sections identiques lorsqu'il est en position basculée comme illustré sur la figure 10. Cette solution permet d'équilibrer les flux de part et d'autre du volet 60 lorsque le dispositif est à l'état passant.Preferably, the device of the invention provides a single flap 60 whose dimensions are adapted to those of the duct 58, pivotable along an axis 62 perpendicular to the direction of flow of the gas stream. So, as illustrated on the figure 11 when the device is in the off state corresponding to a forced extraction operation, the flap 60 is arranged to close the duct 58 substantially horizontally. When the device is in the on state corresponding to a natural draft operation, the flap 60 is arranged vertically in the duct so as to let the gas flows. Preferably, the axis 62 is disposed in the vertical median plane of the duct so that the flap 60 splits the duct 58 into two half conduits 58.1 and 58.2 of identical sections when in the tilted position as shown in FIG. figure 10 . This solution makes it possible to balance the flows on either side of the flap 60 when the device is in the on state.

Avantageusement, une butée 63 permet de limiter la rotation du volet 60 autour de l'axe 62 et de l'immobiliser en position verticale.Advantageously, a stop 63 makes it possible to limit the rotation of the shutter 60 about the axis 62 and to immobilize it in a vertical position.

Une motorisation 64, placée dans le prolongement de l'axe 62 dans un compartiment 66 accolé au conduit 58, permet d'entrainer en rotation l'axe 62 pour basculer le volet 60.A motorization 64, placed in the extension of the axis 62 in a compartment 66 joined to the duct 58, makes it possible to drive the axis 62 in rotation in order to tilt the shutter 60.

Selon une caractéristique importante de l'invention, le volet a un profil d'aile et comprend selon le sens d'écoulement de l'air un bord d'attaque 68 arrondi et un bord de fuite 70 effilé, la section du volet 60 augmentant au niveau de l'arrondi du bord d'attaque 68 pour diminuer progressivement jusqu'au bord de fuite 70.According to an important characteristic of the invention, the flap has a wing profile and comprises, according to the direction of flow of the air, a rounded leading edge 68 and a tapered trailing edge 70, the section of the flap 60 increasing. at the level of the rounding of the leading edge 68 to gradually decrease to the trailing edge 70.

A titre d'exemple, le volet a une hauteur H de l'ordre de 270 mm, un arrondi au niveau du bord d'attaque 68 avec un rayon de courbure de l'ordre de 5 mm et une épaisseur maximale e de l'ordre de 10 mm.For example, the shutter has a height H of the order of 270 mm, a rounded at the leading edge 68 with a radius of curvature of the order of 5 mm and a maximum thickness e of the order of 10 mm.

Ce profil de volet permet une meilleure extraction car elle augmente la section de passage et permet de réduire les pertes de charge.This shutter profile allows better extraction because it increases the cross section and reduces pressure losses.

Selon un autre avantage, ce profil de volet permet d'avoir à l'état passant deux conduits 58.1 et 58.2 en forme de tube de venturi permettant d'obtenir au niveau de la section la plus importante du volet une augmentation de la vitesse d'extraction du flux gazeux et une diminution de pression qui améliore le tirage naturel.According to another advantage, this shutter profile makes it possible to have in the passing state two ducts 58.1 and 58.2 in the form of a venturi tube making it possible to obtain, at the level of the most important section of the shutter, an increase in the speed of extraction of the gas flow and a decrease of pressure which improves the natural draft.

Claims (7)

Dispositif d'assistance mécanique pour l'évacuation de flux gazeux, comprenant un réseau fluidique dédié aux produits de combustion d'au moins un appareil (23) disposé dans une pièce d'habitation comprenant des moyens de mise à l'atmosphère susceptibles d'occuper un premier état fermé et un second état ouvert pour permettre l'échappement des produits de combustion par un tirage naturel, les moyens de mise à l'atmosphère comprenant au moins un conduit (58) canalisant les flux gazeux susceptible d'être obturé par au moins un volet (60) pivotant autour d'un axe (62) s'étendant selon une direction perpendiculaire à la direction d'écoulement des flux gazeux, caractérisé en ce que ledit au moins un volet (60) a un profil d'aile et comprend un bord d'attaque (68) arrondi et un bord de fuite (70) effilé, la section du volet (60) augmentant au niveau de l'arrondi du bord d'attaque (68) pour diminuer progressivement jusqu'au bord de fuite (70).Mechanical assistance device for the evacuation of gas flows, comprising a fluidic network dedicated to the products of combustion of at least one apparatus (23) arranged in a living room comprising means of venting likely to occupying a first closed state and a second open state to allow the escape of the combustion products by a natural draft, the venting means comprising at least one conduit (58) channeling the gas flow can be closed by at least one flap (60) pivoting about an axis (62) extending in a direction perpendicular to the direction of flow of the gas flows, characterized in that said at least one flap (60) has a profile of wing and comprises a rounded leading edge (68) and a tapered trailing edge (70), the section of the flap (60) increasing at the rounded edge of the leading edge (68) to gradually decrease to trailing edge (70). Dispositif d'assistance mécanique pour l'évacuation de flux gazeux selon la revendication 1, caractérisé en ce que les moyens de mise à l'atmosphère comprennent un seul volet (60) pivotant autour d'un axe (62) disposé dans le plan médian vertical du conduit (58).Mechanical assistance device for the evacuation of gas flow according to claim 1, characterized in that the venting means comprise a single flap (60) pivoting about an axis (62) arranged in the median plane vertical duct (58). Dispositif d'assistance mécanique pour l'évacuation de flux gazeux selon la revendication 2, caractérisé en ce que le volet a un arrondi au niveau du bord d'attaque (68) avec un rayon de courbure de l'ordre de 5 mm et une épaisseur maximale e de l'ordre de 10 mm.Mechanical assistance device for the evacuation of gas flow according to claim 2, characterized in that the flap has a rounded at the leading edge (68) with a radius of curvature of the order of 5 mm and a maximum thickness e of the order of 10 mm. Dispositif d'assistance mécanique pour l'évacuation de flux gazeux selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comprend des moyens de détection (38) comportant des moyens pour mesurer la vitesse de l'écoulement (ou le débit) dans le circuit aéraulique dédié aux produits de combustion et transmettre un signal lorsque cette vitesse descend en dessous d'un seuil prédéterminé.Mechanical assistance device for the evacuation of gas flow according to any one of claims 1 to 3, characterized in that it comprises detection means (38) comprising means for measuring the flow velocity (or the flow) in the ventilation circuit dedicated to the products of combustion and transmit a signal when this speed falls below a predetermined threshold. Dispositif d'assistance mécanique pour l'évacuation de flux gazeux selon la revendication 4, caractérisé en ce que les moyens de détection (38) comprennent une palette (40) s'étendant en travers d'un conduit du circuit aéraulique susceptible de pivoter selon un axe sensiblement horizontal, perpendiculaire à l'écoulement, la palette étant susceptible d'occuper une position déterminée stable sous l'effet de son propre poids en l'absence d'écoulement, et une position écartée après pivotement, en présence d'un écoulement, ainsi que des moyens (44) transmettant un signal lorsque l'écart angulaire entre la position stable et la position occupée par la palette est inférieur à un seuil déterminé.Mechanical assistance device for the evacuation of gas flow according to claim 4, characterized in that the detection means (38) comprise a pallet (40) extending across a duct of the air flow circuit capable of pivoting according to a substantially horizontal axis, perpendicular to the flow, the pallet being capable of occupying a determined stable position under the effect of its own weight in the absence of flow, and a postponed position after pivoting, in the presence of a flow, and means (44) transmitting a signal when the angular difference between the stable position and the position occupied by the pallet is less than a determined threshold. Dispositif d'assistance mécanique pour l'évacuation de flux gazeux selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comprend un système d'extraction (12) relié au réseau fluidique dédié aux produits de combustion, fonctionnant à un régime permettant de maintenir dans le circuit aéraulique une dépression comprise entre 55 et 95 Pa au niveau d'un caisson prévu sous les moyens de mise à l'atmosphère.Mechanical assistance device for the evacuation of gas flow according to any one of claims 1 to 5, characterized in that it comprises an extraction system (12) connected to the fluid network dedicated to the combustion products, operating at a regime for maintaining in the air flow a depression between 55 and 95 Pa at a box provided under the venting means. Dispositif d'assistance mécanique pour l'évacuation de flux gazeux selon la revendication 6, caractérisé en ce que le système d'extraction (12) fonctionne à un régime permettant de maintenir dans le circuit aéraulique une dépression comprise entre 80 à 85 Pa au niveau d'un caisson prévu sous les moyens de mise à l'atmosphère.Mechanical assistance device for evacuating gaseous flow according to claim 6, characterized in that the extraction system (12) operates at a speed which makes it possible to maintain a vacuum in the air-flow circuit of between 80 and 85 Pa a box provided under the venting means.
EP08300032.3A 2007-01-19 2008-01-14 Mechanical assistance device for evacuating gas streams, more particularly intended for a residential unit Active EP1947384B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11154891.3A EP2360433B1 (en) 2007-01-19 2008-01-14 Mechanical assistance device for evacuating gas streams, more particularly intended for a residential unit and method of evacuating exhaust air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0752755A FR2911671B1 (en) 2007-01-19 2007-01-19 DEVICE FOR MECHANICAL ASSISTANCE FOR THE EVACUATION OF GAS FLOWS PARTICULARLY FOR A HABITABLE ASSEMBLY

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EP11154891.3A Division-Into EP2360433B1 (en) 2007-01-19 2008-01-14 Mechanical assistance device for evacuating gas streams, more particularly intended for a residential unit and method of evacuating exhaust air
EP11154891.3A Division EP2360433B1 (en) 2007-01-19 2008-01-14 Mechanical assistance device for evacuating gas streams, more particularly intended for a residential unit and method of evacuating exhaust air

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EP1947384A1 true EP1947384A1 (en) 2008-07-23
EP1947384B1 EP1947384B1 (en) 2017-10-11

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
FR2950414A1 (en) * 2009-09-22 2011-03-25 Gdf Suez IMPROVED GAS FLOW CIRCULATION SYSTEM FOR A HABITABLE ASSEMBLY
FR2951809A1 (en) * 2009-10-23 2011-04-29 Poujoulat Equipment for assuring passage of smoke evacuation pipe connected to e.g. mural condensation boiler in collective dwelling, has ventilation structure provided with passage for circulating air towards chimney flue liner
BE1019913A5 (en) * 2011-04-21 2013-02-05 Renson Ventilation Nv VENTILATION SYSTEM.
FR3007824A1 (en) * 2013-06-27 2015-01-02 Andre Amphoux CONDUIT SHUNT EXHAUST / AERATION.

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
FR3066234B1 (en) * 2017-05-11 2019-11-22 Vti LOW PRESSURE AIR EXTRACTION DEVICE.
FR3129462B1 (en) * 2021-11-19 2023-12-08 Vti Fixing support for a turret for extracting a fluid flow, system for extracting a fluid flow and regulation method

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FR2782781B1 (en) * 1998-09-02 2000-09-29 Andre Amphoux SAFETY DEVICE FOR GAS EVACUATION SYSTEMS
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FR2466824A1 (en) * 1979-10-05 1981-04-10 Fiat Ricerche SEASON-TYPE HEATING TYPE VENTING COMPONENT
FR2550318A1 (en) * 1983-08-04 1985-02-08 Gaz De France Condesation gas boiler connected to a controlled mechanical ventilation installation and with controlled delivery.
JPS61235633A (en) * 1985-04-11 1986-10-20 Matsushita Electric Ind Co Ltd Controller of flowing direction
BE1001876A3 (en) * 1988-12-13 1990-04-03 Sprl Bureau Tech De Ventilatio Ventilation grid
FR2785977A1 (en) 1998-11-16 2000-05-19 Michel Bodin Shunt duct for heater chimney has ventilation pipes with casing having flow control shutters operated dependent on blower pressure
JP2000193301A (en) * 1998-12-25 2000-07-14 Funai Electric Co Ltd Wind direction regulator for air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2950414A1 (en) * 2009-09-22 2011-03-25 Gdf Suez IMPROVED GAS FLOW CIRCULATION SYSTEM FOR A HABITABLE ASSEMBLY
EP2302301A1 (en) * 2009-09-22 2011-03-30 Gdf Suez Improved system for the circulation of gases for a residential building
FR2951809A1 (en) * 2009-10-23 2011-04-29 Poujoulat Equipment for assuring passage of smoke evacuation pipe connected to e.g. mural condensation boiler in collective dwelling, has ventilation structure provided with passage for circulating air towards chimney flue liner
BE1019913A5 (en) * 2011-04-21 2013-02-05 Renson Ventilation Nv VENTILATION SYSTEM.
FR3007824A1 (en) * 2013-06-27 2015-01-02 Andre Amphoux CONDUIT SHUNT EXHAUST / AERATION.

Also Published As

Publication number Publication date
FR2911671A1 (en) 2008-07-25
EP1947384B1 (en) 2017-10-11
FR2911671B1 (en) 2010-06-18
EP2360433A1 (en) 2011-08-24
EP2360433B1 (en) 2019-06-05

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