EP2965021B1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
EP2965021B1
EP2965021B1 EP14710207.3A EP14710207A EP2965021B1 EP 2965021 B1 EP2965021 B1 EP 2965021B1 EP 14710207 A EP14710207 A EP 14710207A EP 2965021 B1 EP2965021 B1 EP 2965021B1
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EP
European Patent Office
Prior art keywords
air
venturi
secondary air
chamber
mixing
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EP14710207.3A
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German (de)
French (fr)
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EP2965021A1 (en
Inventor
Dan Alexandru BUNIS
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Modulair SA
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Modulair SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/26—Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/022—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
    • F24F1/027—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle mounted in wall openings, e.g. in windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the present invention relates to an air conditioning device, and to a method of air conditioning air in a confined environment.
  • Air conditioning devices integrated into the ceiling of confined rooms are well known.
  • a first type relates to cold beams of the static type, in which the air passes through a cooled exchanger, the air flow being generated by simple convection.
  • a second type of cold beam relates to dynamic type cold beams in which a flow of cool air coming from outside the confined space is mixed with secondary air coming from the room to be conditioned.
  • the primary air is injected at high pressure into nozzles, inducing a suction of secondary air by the venturi effect.
  • This type of device has many advantages.
  • a first advantage is that the injection of fresh air allows renewal of the air in the confined environment.
  • the primary fresh air can also be dried so as to avoid condensation phenomena.
  • the secondary air passes through a cooled heat exchanger before mixing, which increases the cooling capacity of the complete device.
  • these dynamic cold beams have other drawbacks that the present invention will seek to reduce.
  • this type of device is generally noisy. Indeed, for optimum operation, the ratio between the primary fresh air supply and the secondary air recirculation should be around 1: 7.
  • the pressure of the primary air, and its speed in the nozzles induce noise that is difficult to bear continuously.
  • these dynamic beams generally operate with a primary air / secondary air ratio lower than the optimum, generally between 1: 2 and 1: 6. This low ratio implies a renewal of air in the medium greater than what is necessary, implying an energy consumption higher than what is strictly necessary.
  • the European patent application EP1319901 discloses a device comprising two Venturi type devices arranged in series making it possible to mix so-called primary fresh air with said secondary recirculated air. Nevertheless, the pressure at the inlet of the second Venturi device is largely insufficient, and does not allow sufficient secondary air suction to be achieved, and the ratio between secondary air and primary air is still insufficient.
  • the present invention aims to provide an air conditioning device with a dynamic cold beam, exhibiting reduced noise while offering an improved primary air / secondary (recirculated) air ratio.
  • it also aims to improve the thermal comfort associated with the use of the device of the invention.
  • the object of the invention is achieved by an air conditioning device according to claim 1.
  • the present invention relates to an air conditioning device comprising a primary air intake duct (chamber) connected to the inlet. of a first venturi-type device (inductor) the suction of which communicates with a first duct (chamber) for the admission of secondary air, the outlet of the first venturi-type device communicating with the inlet of a second control device venturi type (inductor) the suction of which is connected to a second duct (chamber) for the admission of secondary air comprising a first heat exchanger.
  • a primary air intake duct chamber
  • a first venturi-type device the suction of which communicates with a first duct (chamber) for the admission of secondary air
  • the outlet of the first venturi-type device communicating with the inlet of a second control device venturi type (inductor) the suction of which is connected to a second duct (chamber) for the admission of secondary air comprising a first heat exchanger.
  • the output of this device communicates directly or indirectly with the room to be conditioned.
  • the first device of the venturi type comprises a primary air inlet nozzle comprising a diameter restriction at its free end, said free end opening into a suction chamber communicating with the first inlet duct. secondary air, said suction chamber comprising an outlet opening facing the outlet of said inlet nozzle, said outlet opening communicating with the inlet of the second device of the venturi type.
  • the second venturi-type device comprises an intake (or mixing) chamber, the intake chamber having a cross section at least twice as large as the outlet opening of the suction chamber of the first venturi-type device.
  • the second device of the venturi type comprises a plate pierced with orifices, said plate separating the intake chamber communicating with the outlet of the first mixing device and a mixing chamber communicating with the second secondary air intake duct, said orifices producing, in use, a venturi effect drawing secondary air from the second secondary air intake duct.
  • the device of the invention comprises an adjustable valve or valve making it possible to inject primary air directly at the inlet of the second venturi type device, downstream of the first venturi device, so as to be able to regulate the ratio of total mixture between primary air and secondary air.
  • the first secondary air intake duct comprises a second heat exchanger making it possible, in use, to cool the secondary air.
  • the heat exchanger (s) comprise vertical fins, and a condensation discharge device at the bottom thereof.
  • a second aspect of the invention relates to a facade, a facade element or an element allowing access to the facade of a building comprising an air conditioning device according to any one of claims 1-5.
  • the facade of the invention comprises two walls separated by a ventilation space, the first and second secondary air intake ducts communicating with said ventilation space.
  • the second wall may be of the curtain or helioscreen type, or, preferably, the facade will be of the active facade type.
  • a third aspect of the invention relates to a method of air conditioning the air of a confined space according to claim 8.
  • the present invention relates to an air conditioning device 10 of the dynamic chilled beam type comprising a double module for inducing secondary air, making it possible, in use, to increase the ratio between the primary air flow 18,22 outside injected into the room to be conditioned, and the secondary air flow recirculated 16,17.
  • the use of two Venturi type induction modules, arranged in series, makes it possible to reduce noise, without increasing the necessary primary air pressure, while allowing the secondary air flow to be increased for an air flow. primary given.
  • venturi-type device or induction device
  • This is typically a device of the ejector or eductor type, either in the form of nozzles, diaphragms, or more complex devices comprising an inlet nozzle, a suction chamber and an outlet nozzle.
  • inlet of a venturi device is meant the inlet of the first air flow.
  • the first venturi device into which air conditioning 18 from an external air conditioning coil is injected, comprises an injection nozzle 3 comprising a restriction at its free end.
  • This nozzle opens into a suction chamber 2 communicating with a secondary air duct 9 (coming from the room to be conditioned).
  • the suction chamber 2 also comprises an outlet orifice 15 facing the outlet of the injection nozzle 3. This orifice 15 will advantageously be extended by a profiled ejection nozzle, so as to reduce turbulence and the noise generated by this turbulence.
  • the first venturi device is dimensioned such that the flow rate ratio between the primary air 18 and the air induced 17 by the first venturi device is between 0.7 and 1.5.
  • the second venturi-type device comprises an inlet chamber, the inlet chamber having a section at least twice as large as the outlet orifice of the suction chamber.
  • the increased section of the intake chamber allows compression of the first mixture air, which considerably improves the air induction by the second Venturi type device.
  • the temperature of the primary air 18 will preferably be between 14 and 18 ° C depending on the cooling power required. This primary air 18 will also have a controlled humidity rate so as to reduce the relative humidity of the room, so as to avoid any condensation phenomenon. Finally, the pressure of the primary air 18 will preferably be between 300 and 500 Pa, ideally around 400 Pa.
  • the pressures included in this description are of course relative pressures with respect to the ambient atmospheric pressure (pressure difference with respect to the environment).
  • the second induction device will preferably be in the form of a wall 14 (plate) separating the inlet or mixing chamber 4 into which the outlet 15 of the first venturi device emerges from a second mixing chamber 6. into which opens a second secondary air intake duct 11.
  • This second intake duct comprises a main heat exchanger 8 making it possible to effectively cool the secondary air flow 16 induced by the second venturi device.
  • the wall 14 will include orifices 5 communicating between the first mixing chamber 4 and the second mixing chamber 6. These orifices 5 will either be in the form of simple diaphragms, or in the form of nozzles inducing an increase in the speed of the air. , and by this fact, a venturi effect sucking the secondary air 16 through the main heat exchanger 8.
  • the pressure in the first mixing chamber 4 is preferably between 50 and 100 Pa, so as to reduce the noise generated by the device.
  • the flow rate ratio between the secondary air intake 16 of the second venturi device and the outlet 19 of the first induction device is preferably between 2 and 4, bringing the total ratio between primary air and air induced by the two devices. venturi to a value greater than around 4, preferably greater than 6, and even advantageously greater than 7.
  • the figure 4 represents the operation of the device when the valve 21 is in position opened.
  • a primary air flow 22 is admitted directly into the inlet chamber 4.
  • the first secondary air inlet duct will comprise a non-return device (not shown), for example in the form of a valve preventing a reverse flow of primary air.
  • a secondary heat exchanger 7 can advantageously be placed on the fluid path of the secondary air flow 17 upstream of the suction of the first venturi-type device. This secondary heat exchanger 7 makes it possible on the one hand to increase the total power of the device, and on the other hand to regulate the humidity of the mixture in the first mixing chamber 4.
  • the setpoint temperature of the heat exchangers 7,8 will be maintained at a temperature of between 14 and 20 ° C., so as to avoid condensation while providing sufficient cooling power.
  • This setpoint temperature will be adapted according to the power required and the relative humidity of the secondary air.
  • the air conditioning module (device) of the invention is integrated in the facade, above the windows, so as to induce a secondary air flow in front of the hot zone induced by the glazing of the building.
  • This hot zone could advantageously be optimized by the use of devices simulating an active facade, such as curtains or helioscreens.
  • the air conditioning module of the invention is integrated into an active facade comprising a ventilated void included between two walls, the secondary air intake ducts 9,11 being connected to said ventilated void.
  • the circulation of conditioned secondary air between the two walls makes it possible to cool the internal wall, and thereby improve the comfort of the air-conditioned room, the walls of the room having a lowered temperature, which improves the comfort.
  • the front arrangement allows the use of vertical exchangers, which allows easy collection and evacuation of any condensation on the fins of these exchangers.
  • the integration of the air conditioning module of the invention in the facade also makes it possible to reduce the bulk, the primary air and cold water pipes can easily be integrated into said facade, avoiding having to integrate the beams into the ceilings, posing installation and maintenance difficulties.
  • the device of the invention may advantageously integrate one or more carbon filters.
  • the internal surfaces of the mixing chambers and the venturis may be covered with catalytic paint comprising Ag ions or titanium oxide photocatalytic paints which, through the use of UV light sources, reduce the volatile organic compounds present in the room.
  • the primary fresh air can also be taken directly from the facade by means of a fan, the humidity is then regulated directly along the heat exchangers, by means of a condensate pan placed under the heat exchangers.
  • FIG. 1 An exemplary embodiment of a device 10 according to the invention is shown in figures 1 to 4 .
  • This device is integrated into an active facade in which the air is heated by the action of the sun in a ventilated space between 2 panes.
  • the air in the ventilated vacuum communicates with the room to be conditioned through the bottom of the active window, so as to increase the natural convection through the device, thus further improving the secondary air flow.
  • a distribution duct 12 placed on the front provides conditioned primary air.
  • the air in this duct is maintained at a pressure of 410 Pa and a temperature of about 14 ° C.
  • the humidity of this primary air is around 90%.
  • This air is conditioned by means of a first centralized battery for the entire building.
  • the energy consumption of this first battery, per air conditioning module, is around 283W for an outside temperature of 32 ° C and a relative humidity of 50%.
  • This air-conditioned primary air 18 is brought by a distribution chamber 1 to a nozzle 3 opening into the first suction chamber 2.
  • the air-conditioned primary air flow rate in each facade module is 25 m 3 / h.
  • the air-conditioned primary air flow at the outlet of the nozzle 3 draws secondary air 17 through an orifice 13.
  • This secondary air coming from the intake duct 9 passes into a heat exchanger 7 before being mixed with the primary air 18 in the suction chamber 2.
  • the temperature of the cooling water in this exchanger is 12 ° C at the inlet and 14 ° C at the outlet.
  • the power consumed by this battery is around 146W.
  • the secondary air 17 comes from an active facade, and enters the heat exchanger at a temperature of 34 ° C and 36% relative humidity.
  • the secondary air flow 17 in this first heat exchanger 7, induced by the primary air flow, is 25 m 3 / h.
  • the mixture 19 of primary 18 and secondary 17 air induced by the first venturi is injected into a chamber 4 delimited by a wall 14 pierced with orifices 5 opening onto a second suction chamber 6.
  • Secondary air 16 enters this second suction chamber 6 through a second heat exchanger 8.
  • the secondary air drawn in through the duct 11 again comes from the active facade and has the same inlet characteristics as the air admitted by the duct 9.
  • the secondary air flow induced in this second venturi is around 150m 3 / h.
  • An air flow rate of 200m 3 / h is therefore obtained at the outlet of the device, for a primary air flow rate of 25m 3 / h, ie a multiplying factor of 8 (or a ratio of 1: 7).
  • the outlet air in this example is 18 ° C, for an ambient temperature of 26 ° C. This conditioned air is ejected through port 23.
  • a valve 20, 21 allows the need to bypass the first inductor (venturi), if necessary, so as to increase and reduce the multiplicative factor of the device.
  • the primary air despite increases to 50m 3 / h, while the secondary air flow induced in the second inductor remains constant at 150m 3 / h, passing by a multiplying factor of 8 to 4.
  • Forcing the secondary air into the ventilated space of the active facade prevents an exaggerated increase in the temperature of the interior walls of the room, which improves the sensory comfort of the occupants.
  • the two heat exchangers 7,8 being contiguous, in practice, a single exchanger can be used with a wall separating the two conduits. Nevertheless, it may be advantageous to regulate these two heat exchangers separately, so as to avoid any condensation in the first mixing chamber.
  • the dimensions of the module of the example are compatible with the dimensions of windows usually used in the building, in this case, in this example, the width of the second heat exchanger is 1m, and 25cm for the first exchanger.
  • the height of the first and second heat exchangers is 29cm, while the total height of the module (including the primary air distribution duct 12) is 60cm.

Description

Objet de l'inventionObject of the invention

La présente invention se rapporte à un dispositif de climatisation, et à une méthode de climatisation d'air d'un milieu confiné.The present invention relates to an air conditioning device, and to a method of air conditioning air in a confined environment.

Etat de la techniqueState of the art

Les dispositifs de climatisation intégrés au plafond de pièces confinées sont bien connus. Parmi ces dispositifs, un premier type concerne les poutres froides de type statiques, dans lesquelles l'air passe dans un échangeur refroidi, le flux d'air étant engendré par simple convection.Air conditioning devices integrated into the ceiling of confined rooms are well known. Among these devices, a first type relates to cold beams of the static type, in which the air passes through a cooled exchanger, the air flow being generated by simple convection.

Un deuxième type de poutres froides concerne des poutres froides de type dynamiques dans lesquelles un flux d'air frais provenant de l'extérieur du lieu confiné est mélangé à de l'air secondaire provenant de la pièce à climatiser. Dans ce type de dispositifs, l'air primaire est injecté à haute pression dans des buses, induisant une aspiration d'air secondaire par effet venturi. Ce type de dispositif présente de nombreux avantages. Un premier avantage est que l'injection d'air frais permet un renouvellement de l'air du milieu confiné. L'air frais primaire peut en outre être séché de façon à éviter les phénomènes de condensation. Enfin, l'air secondaire passe dans un échangeur thermique refroidi avant mélange, ce qui augmente la capacité de refroidissement du dispositif complet.A second type of cold beam relates to dynamic type cold beams in which a flow of cool air coming from outside the confined space is mixed with secondary air coming from the room to be conditioned. In this type of device, the primary air is injected at high pressure into nozzles, inducing a suction of secondary air by the venturi effect. This type of device has many advantages. A first advantage is that the injection of fresh air allows renewal of the air in the confined environment. The primary fresh air can also be dried so as to avoid condensation phenomena. Finally, the secondary air passes through a cooled heat exchanger before mixing, which increases the cooling capacity of the complete device.

Par contre, ces poutres froides dynamiques présentent d'autres inconvénients que la présente invention cherchera à réduire. Parmi ceux-ci, ce type de dispositif est généralement bruyant. En effet, pour un fonctionnement optimum, le rapport entre l'apport d'air frais primaire et la recirculation d'air secondaire devrait-être d'environs 1:7. Or, pour obtenir un tel rapport par simple effet venturi, la pression de l'air primaire, et sa vitesse dans les buses induisent un bruit difficilement supportable en continu. Aussi, ces poutres dynamiques fonctionnent-elles généralement avec un ratio air primaire/air secondaire inférieur à l'optimum, généralement compris entre 1:2 et 1:6. Ce faible ratio implique un renouvellement d'air dans le milieu supérieur à ce qui est nécessaire, impliquant une consommation énergétique supérieure à ce qui est strictement nécessaire.On the other hand, these dynamic cold beams have other drawbacks that the present invention will seek to reduce. Of these, this type of device is generally noisy. Indeed, for optimum operation, the ratio between the primary fresh air supply and the secondary air recirculation should be around 1: 7. However, to obtain such a ratio by simple venturi effect, the pressure of the primary air, and its speed in the nozzles induce noise that is difficult to bear continuously. Also, these dynamic beams generally operate with a primary air / secondary air ratio lower than the optimum, generally between 1: 2 and 1: 6. This low ratio implies a renewal of air in the medium greater than what is necessary, implying an energy consumption higher than what is strictly necessary.

La demande de brevet européen EP1319901 divulgue un dispositif comprenant deux dispositifs de type Venturi disposés en série permettant de mélanger de l'air frais dit primaire avec de l'air recirculé dit secondaire. Néanmoins, la pression à l'entrée du second Venturi de dispositif est largement insuffisante, et ne permet pas d'atteindre une aspiration suffisante d'air secondaire, et le ratio entre air secondaire et air primaire est encore insuffisant.The European patent application EP1319901 discloses a device comprising two Venturi type devices arranged in series making it possible to mix so-called primary fresh air with said secondary recirculated air. Nevertheless, the pressure at the inlet of the second Venturi device is largely insufficient, and does not allow sufficient secondary air suction to be achieved, and the ratio between secondary air and primary air is still insufficient.

But de l'inventionAim of the invention

La présente invention vise à proposer un dispositif de climatisation à poutre froide dynamique, présentant un bruit réduit tout en offrant un ratio air primaire/air secondaire (recirculé) amélioré.The present invention aims to provide an air conditioning device with a dynamic cold beam, exhibiting reduced noise while offering an improved primary air / secondary (recirculated) air ratio.

Selon certains modes préférés de l'invention, elle vise aussi à améliorer le confort thermique lié à l'utilisation du dispositif de l'invention.According to certain preferred embodiments of the invention, it also aims to improve the thermal comfort associated with the use of the device of the invention.

Résumé de l'inventionSummary of the invention

Le but de l'invention est atteint par un dispositif de climatisation selon la revendication 1. La présente invention se rapporte à un dispositif de climatisation de l'air comprenant un conduit (chambre) d'admission d'air primaire connecté à l'entrée d'un premier dispositif de type venturi (inducteur) dont l'aspiration communique avec un premier conduit (chambre) d'admission d'air secondaire, la sortie du premier dispositif de type venturi communicant avec l'entrée d'un second dispositif de type venturi (inducteur) dont l'aspiration est connectée à un second conduit (chambre) d'admission d'air secondaire comprenant un premier échangeur thermique.The object of the invention is achieved by an air conditioning device according to claim 1. The present invention relates to an air conditioning device comprising a primary air intake duct (chamber) connected to the inlet. of a first venturi-type device (inductor) the suction of which communicates with a first duct (chamber) for the admission of secondary air, the outlet of the first venturi-type device communicating with the inlet of a second control device venturi type (inductor) the suction of which is connected to a second duct (chamber) for the admission of secondary air comprising a first heat exchanger.

La sortie de ce dispositif communique directement ou indirectement avec la pièce à climatiser.The output of this device communicates directly or indirectly with the room to be conditioned.

Selon l'invention, le premier dispositif du type venturi comprend une tuyère d'entrée de l'air primaire comprenant une restriction de diamètre à son extrémité libre, ladite extrémité libre débouchant dans une chambre d'aspiration communiquant avec le premier conduit d'admission d'air secondaire, ladite chambre d'aspiration comprenant un orifice de sortie face à la sortie de ladite tuyère d'entrée, ledit orifice de sortie communicant avec l'entrée du second dispositif de type venturi.According to the invention, the first device of the venturi type comprises a primary air inlet nozzle comprising a diameter restriction at its free end, said free end opening into a suction chamber communicating with the first inlet duct. secondary air, said suction chamber comprising an outlet opening facing the outlet of said inlet nozzle, said outlet opening communicating with the inlet of the second device of the venturi type.

Selon l'invention, le second dispositif de type venturi comprend une chambre d'admission (ou de mélange), la chambre d'admission présentant une section au moins deux fois plus grande que l'orifice de sortie de la chambre d'aspiration du premier dispositif de type venturi.According to the invention, the second venturi-type device comprises an intake (or mixing) chamber, the intake chamber having a cross section at least twice as large as the outlet opening of the suction chamber of the first venturi-type device.

Avantageusement, le second dispositif du type venturi comprend une plaque percée d'orifices ladite plaque séparant la chambre d'admission communicant avec la sortie du premier dispositif de mélange et une chambre de mélange communiquant avec le second conduit d'admission d'air secondaire, lesdits orifices produisant, en utilisation, un effet venturi aspirant l'air secondaire depuis le second conduit d'admission d'air secondaire.Advantageously, the second device of the venturi type comprises a plate pierced with orifices, said plate separating the intake chamber communicating with the outlet of the first mixing device and a mixing chamber communicating with the second secondary air intake duct, said orifices producing, in use, a venturi effect drawing secondary air from the second secondary air intake duct.

De préférence, le dispositif de l'invention comprend un clapet ou vanne réglable permettant d'injecter de l'air primaire directement à l'entrée du second dispositif de type venturi, en aval du premier dispositif venturi, de façon à pouvoir réguler le ratio de mélange total entre l'air primaire et l'air secondaire.Preferably, the device of the invention comprises an adjustable valve or valve making it possible to inject primary air directly at the inlet of the second venturi type device, downstream of the first venturi device, so as to be able to regulate the ratio of total mixture between primary air and secondary air.

Avantageusement, le premier conduit d'admission d'air secondaire comprend un second échangeur thermique permettant en utilisation de refroidir l'air secondaire.Advantageously, the first secondary air intake duct comprises a second heat exchanger making it possible, in use, to cool the secondary air.

De préférence, le ou les échangeur(s) thermiques comprennent des ailettes verticales, et un dispositif d'évacuation de la condensation au bas de celles-ci.Preferably, the heat exchanger (s) comprise vertical fins, and a condensation discharge device at the bottom thereof.

Un second aspect de l'invention concerne une façade, un élément de façade ou un élément permettant l'accès à la façade d'un bâtiment comprenant un dispositif de climatisation selon l'une quelconque des revendications 1-5.A second aspect of the invention relates to a facade, a facade element or an element allowing access to the facade of a building comprising an air conditioning device according to any one of claims 1-5.

Avantageusement la façade de l'invention comprend deux parois séparées par un espace de ventilation, les premiers et second conduits d'admission d'air secondaire communicant avec ledit espace de ventilation.Advantageously, the facade of the invention comprises two walls separated by a ventilation space, the first and second secondary air intake ducts communicating with said ventilation space.

La seconde paroi pourra être du type rideau ou hélioscreen, ou, de préférence, la façade sera du type façade active.The second wall may be of the curtain or helioscreen type, or, preferably, the facade will be of the active facade type.

Un troisième aspect de l'invention concerne une méthode de climatisation d'air d'un lieu confiné selon la revendication 8.A third aspect of the invention relates to a method of air conditioning the air of a confined space according to claim 8.

Selon des modes préférés de l'invention, la méthode de climatisation de l'invention comprend en outre une ou une combinaison appropriée de plusieurs des caractéristiques suivantes:

  • ladite pression prédéterminée est comprise entre 100 et 1000 Pa, de préférence entre 300 et 500 Pa;
  • le rapport entre l'admission d'air primaire et d'air secondaire dans le premier dispositif de mélange est compris entre 0,7 et 2,5, de préférence entre 0,9 et 2,5, avantageusement supérieur à 1,6;
  • le rapport de débit entre l'admission du premier mélange d'air et d'air secondaire dans le second dispositif de mélange est compris entre 2 et 4;
  • la pression du premier mélange d'air à l'entrée du second dispositif venturi est comprise entre 50 et 200 Pa, de préférence entre 70 et 150Pa;
  • l'air secondaire circule dans un espace ventilé entre deux parois d'une façade active avant d'être admis dans les premières et secondes chambres de mélanges
  • l'air primaire prélevé à l'étape (a) est amené à une température prédéterminée avant d'être injecté dans ledit premier dispositif de type venturi.
According to preferred embodiments of the invention, the air conditioning method of the invention further comprises one or a suitable combination of several of the following characteristics:
  • said predetermined pressure is between 100 and 1000 Pa, preferably between 300 and 500 Pa;
  • the ratio between the admission of primary air and secondary air into the first mixing device is between 0.7 and 2.5, preferably between 0.9 and 2.5, advantageously greater than 1.6;
  • the flow rate ratio between the admission of the first mixture of air and secondary air into the second mixing device is between 2 and 4;
  • the pressure of the first air mixture at the inlet of the second venturi device is between 50 and 200 Pa, preferably between 70 and 150Pa;
  • secondary air circulates in a ventilated space between two walls of an active facade before being admitted into the first and second mixing chambers
  • the primary air taken in step (a) is brought to a predetermined temperature before being injected into said first device of the venturi type.

Brève description des figuresBrief description of the figures

  • La figure 1 représente une vue écorchée d'un exemple de dispositif de climatisation selon l'invention.The figure 1 shows a cutaway view of an example of an air conditioning device according to the invention.
  • La figure 2 représente une vue latérale en coupe suivant le plan AA" de la figure 1.The figure 2 shows a side view in section along the plane AA "of the figure 1 .
  • La figure 3 représente une vue latérale en coupe suivant le plan BB' de la figure 1.The figure 3 represents a side view in section along the plane BB 'of the figure 1 .
  • La figure 4 représente une vue latérale en coupe suivant le plan BB' de la figure 1, le dispositif comprenant un clapet de "by-pass" en position ouverte.The figure 4 represents a side view in section along the plane BB 'of the figure 1 , the device comprising a "bypass" valve in the open position.
Description détaillée de l'inventionDetailed description of the invention

La présente invention se rapporte à un dispositif de climatisation 10 du type poutre froide dynamique comprenant un double module d'induction de l'air secondaire, permettant, en utilisation, d'augmenter le rapport entre le débit d'air primaire 18,22 extérieur injecté dans la pièce à climatiser, et le débit d'air secondaire recirculé 16,17. L'utilisation de deux modules d'induction du type Venturi, disposés en série permet de réduire le bruit, sans augmenter la pression d'air primaire nécessaire, tout en permettant d'augmenter le débit d'air secondaire pour un débit d'air primaire donné.The present invention relates to an air conditioning device 10 of the dynamic chilled beam type comprising a double module for inducing secondary air, making it possible, in use, to increase the ratio between the primary air flow 18,22 outside injected into the room to be conditioned, and the secondary air flow recirculated 16,17. The use of two Venturi type induction modules, arranged in series, makes it possible to reduce noise, without increasing the necessary primary air pressure, while allowing the secondary air flow to be increased for an air flow. primary given.

Par dispositif de type venturi, ou dispositif d'induction, on entend tout type de dispositif dans lequel un premier flux d'air est accéléré par une restriction de section du chemin fluide induisant une aspiration d'un second flux d'air par effet venturi. Il s'agit typiquement de dispositif du type éjecteur ou éducteur, soit sous forme de buses, de diaphragmes, ou de dispositifs plus complexes comprenant une tuyère d'entrée, une chambre d'aspiration et une tuyère de sortie. Par entrée d'un dispositif venturi, on entend l'entrée du premier flux d'air.By venturi-type device, or induction device, is meant any type of device in which a first air flow is accelerated by a restriction of the section of the fluid path inducing suction of a second air flow by the venturi effect. . This is typically a device of the ejector or eductor type, either in the form of nozzles, diaphragms, or more complex devices comprising an inlet nozzle, a suction chamber and an outlet nozzle. By inlet of a venturi device is meant the inlet of the first air flow.

Le premier dispositif venturi, dans lequel est injecté de l'air climatisé 18 en provenance d'une batterie de climatisation externe comprend une tuyère d'injection 3 comprenant une restriction à son extrémité libre. Cette tuyère débouche dans une chambre d'aspiration 2 communiquant avec un conduit d'air secondaire 9 (en provenance de la pièce à climatiser). La chambre d'aspiration 2 comprend aussi un orifice de sortie 15 face à la sortie de la tuyère d'injection 3. Cet orifice 15 sera avantageusement prolongé par une tuyère d'éjection profilée, de façon à réduire les turbulences et le bruit généré par ces turbulences.The first venturi device, into which air conditioning 18 from an external air conditioning coil is injected, comprises an injection nozzle 3 comprising a restriction at its free end. This nozzle opens into a suction chamber 2 communicating with a secondary air duct 9 (coming from the room to be conditioned). The suction chamber 2 also comprises an outlet orifice 15 facing the outlet of the injection nozzle 3. This orifice 15 will advantageously be extended by a profiled ejection nozzle, so as to reduce turbulence and the noise generated by this turbulence.

De préférence, le premier dispositif venturi est dimensionné de façon à ce que ratio de débit entre l'air primaire 18 et l'air induit 17 par le premier dispositif venturi soit compris entre 0,7 et 1,5.Preferably, the first venturi device is dimensioned such that the flow rate ratio between the primary air 18 and the air induced 17 by the first venturi device is between 0.7 and 1.5.

Le second dispositif de type venturi comprend une chambre d'admission, la chambre d'admission présentant une section au moins deux fois plus grande que l'orifice de sortie de la chambre d'aspiration. L'augmentation de section de la chambre d'admission permet une compression du premier mélange d'air, ce qui améliore considérablement l'induction d'air par le second dispositif de type Venturi.The second venturi-type device comprises an inlet chamber, the inlet chamber having a section at least twice as large as the outlet orifice of the suction chamber. The increased section of the intake chamber allows compression of the first mixture air, which considerably improves the air induction by the second Venturi type device.

La température de l'air primaire 18 sera de préférence comprise entre 14 et 18°C en fonction de la puissance de refroidissement requise. Cet air primaire 18 aura en outre un taux d'humidité contrôlé de façon à réduire l'humidité relative de la pièce, de façon à éviter tout phénomène de condensation. Enfin, la pression de l'air primaire 18 sera de préférence comprise entre 300 et 500 Pa, idéalement environs 400 Pa.The temperature of the primary air 18 will preferably be between 14 and 18 ° C depending on the cooling power required. This primary air 18 will also have a controlled humidity rate so as to reduce the relative humidity of the room, so as to avoid any condensation phenomenon. Finally, the pressure of the primary air 18 will preferably be between 300 and 500 Pa, ideally around 400 Pa.

Les pressions reprises dans cette description sont bien entendu des pressions relatives par rapport à la pression atmosphérique ambiante (différence de pression par rapport à l'ambiance).The pressures included in this description are of course relative pressures with respect to the ambient atmospheric pressure (pressure difference with respect to the environment).

Le second dispositif d'induction se présentera de préférence sous la forme d'une paroi 14 (plaque) séparant la chambre de d'admission ou de mélange 4 dans laquelle débouche la sortie 15 du premier dispositif venturi d'une seconde chambre de mélange 6 dans laquelle débouche un second conduit d'admission d'air secondaire 11. Ce second conduit d'admission comprend un échangeur thermique principal 8 permettant de refroidir efficacement le flux d'air secondaire 16 induit par le second dispositif venturi.The second induction device will preferably be in the form of a wall 14 (plate) separating the inlet or mixing chamber 4 into which the outlet 15 of the first venturi device emerges from a second mixing chamber 6. into which opens a second secondary air intake duct 11. This second intake duct comprises a main heat exchanger 8 making it possible to effectively cool the secondary air flow 16 induced by the second venturi device.

La paroi 14 comprendra des orifices 5 communiquant entre la première chambre de mélange 4 et la seconde chambre de mélange 6. Ces orifices 5 seront soit sous la forme de simples diaphragmes, soit sous forme de buses induisant une augmentation de la vitesse de l'air, et par ce fait, un effet venturi aspirant l'air secondaire 16 au travers de l'échangeur thermique principal 8.The wall 14 will include orifices 5 communicating between the first mixing chamber 4 and the second mixing chamber 6. These orifices 5 will either be in the form of simple diaphragms, or in the form of nozzles inducing an increase in the speed of the air. , and by this fact, a venturi effect sucking the secondary air 16 through the main heat exchanger 8.

La pression dans la première chambre de mélange 4 est de préférence comprise entre 50 et 100 Pa, de façon à réduire le bruit généré par le dispositif.The pressure in the first mixing chamber 4 is preferably between 50 and 100 Pa, so as to reduce the noise generated by the device.

Le ratio de débit entre l'admission d'air secondaire 16 du deuxième dispositif venturi et la sortie 19 du premier dispositif d'induction est de préférence compris entre 2 et 4, portant le ratio total entre air primaire et air induit par les deux dispositifs venturi à une valeur supérieure à environs 4, de préférence supérieur à 6, et même avantageusement supérieur à 7.The flow rate ratio between the secondary air intake 16 of the second venturi device and the outlet 19 of the first induction device is preferably between 2 and 4, bringing the total ratio between primary air and air induced by the two devices. venturi to a value greater than around 4, preferably greater than 6, and even advantageously greater than 7.

Avantageusement, une vanne de "by-pass" 20,21 entre une conduite de distribution d'air primaire 12 et la première chambre de mélange 4, de façon à pouvoir augmenter l'injection d'air primaire 22 (ratio air primaire/air secondaire), par exemple lorsque qu'un nombre inhabituel d'occupants se trouvent dans la pièce. La figure 4 représente le fonctionnement du dispositif lorsque la vanne 21 est en position ouverte. Dans ce cas, un flux d'air primaire 22 est admis directement dans la chambre d'entrée 4. Dans ce cas, de préférence, le premier conduit d'admission d'air secondaire comprendra un dispositif anti-retour (non représenté), par exemple sous forme d'un clapet empêchant un flux inverse d'air primaire.Advantageously, a "by-pass" valve 20, 21 between a primary air distribution pipe 12 and the first mixing chamber 4, so as to be able to increase the injection of primary air 22 (primary air / air ratio secondary), for example when an unusual number of occupants are in the room. The figure 4 represents the operation of the device when the valve 21 is in position opened. In this case, a primary air flow 22 is admitted directly into the inlet chamber 4. In this case, preferably, the first secondary air inlet duct will comprise a non-return device (not shown), for example in the form of a valve preventing a reverse flow of primary air.

Un échangeur thermique secondaire 7 peut avantageusement être placé sur le chemin fluide du flux d'air secondaire 17 en amont de l'aspiration du premier dispositif de type venturi. Cet échangeur thermique secondaire 7 permet d'une part d'augmenter la puissance totale du dispositif, et d'autre part de réguler l'humidité du mélange dans la première chambre de mélange 4.A secondary heat exchanger 7 can advantageously be placed on the fluid path of the secondary air flow 17 upstream of the suction of the first venturi-type device. This secondary heat exchanger 7 makes it possible on the one hand to increase the total power of the device, and on the other hand to regulate the humidity of the mixture in the first mixing chamber 4.

De préférence, la température de consigne des échangeurs thermiques 7,8 sera maintenue à une température comprise entre 14 et 20°C, de façon à éviter la condensation tout en offrant une puissance de refroidissement suffisante. Cette température de consigne sera adaptée en fonction de la puissance nécessaire et de l'humidité relative de l'air secondaire.Preferably, the setpoint temperature of the heat exchangers 7,8 will be maintained at a temperature of between 14 and 20 ° C., so as to avoid condensation while providing sufficient cooling power. This setpoint temperature will be adapted according to the power required and the relative humidity of the secondary air.

De préférence, le module (dispositif) de climatisation de l'invention est intégré en façade, au-dessus des fenêtres, de façon à induire un flux d'air secondaire devant la zone chaude induite par le vitrage du bâtiment. Cette zone chaude pourra avantageusement être optimisée par l'utilisation de dispositifs simulant une façade active, tel que des rideaux ou des hélioscreens.Preferably, the air conditioning module (device) of the invention is integrated in the facade, above the windows, so as to induce a secondary air flow in front of the hot zone induced by the glazing of the building. This hot zone could advantageously be optimized by the use of devices simulating an active facade, such as curtains or helioscreens.

Avantageusement, le module de climatisation de l'invention est intégré à une façade active comprenant un vide ventilé compris entre deux parois, les conduits d'admission 9,11 d'air secondaire étant connectés audit vide ventilé. Dans ce cas, la circulation d'air secondaire climatisé entre les deux parois permet de refroidir la paroi interne, et par là, d'améliorer le confort de la pièce climatisée, les parois de la pièce présentant une température abaissée, ce qui améliore le confort.Advantageously, the air conditioning module of the invention is integrated into an active facade comprising a ventilated void included between two walls, the secondary air intake ducts 9,11 being connected to said ventilated void. In this case, the circulation of conditioned secondary air between the two walls makes it possible to cool the internal wall, and thereby improve the comfort of the air-conditioned room, the walls of the room having a lowered temperature, which improves the comfort.

La disposition en façade permet d'utiliser des échangeurs verticaux, ce qui permet une collecte et une évacuation aisée de l'éventuelle condensation sur les ailettes de ces échangeurs.The front arrangement allows the use of vertical exchangers, which allows easy collection and evacuation of any condensation on the fins of these exchangers.

L'intégration du module de climatisation de l'invention en façade permet aussi de réduire l'encombrement, les canalisations d'air primaire et d'eau froide pouvant aisément être intégrées à ladite façade, évitant de devoir intégrer les poutres dans les plafonds, posant des difficultés d'installation et de maintenance.The integration of the air conditioning module of the invention in the facade also makes it possible to reduce the bulk, the primary air and cold water pipes can easily be integrated into said facade, avoiding having to integrate the beams into the ceilings, posing installation and maintenance difficulties.

Le dispositif de l'invention pourra avantageusement intégrer un ou des filtres à charbons. En outre, les surfaces internes des chambres de mélanges et des venturis pourront être couvertes de peinture catalytiques comprenant des ions Ag ou des peintures photocatalytiques à l'oxyde de titane permettant par l'utilisation de sources de lumières UV de réduire les composés organiques volatiles présent dans la pièce.The device of the invention may advantageously integrate one or more carbon filters. In addition, the internal surfaces of the mixing chambers and the venturis may be covered with catalytic paint comprising Ag ions or titanium oxide photocatalytic paints which, through the use of UV light sources, reduce the volatile organic compounds present in the room.

L'air frais primaire peut aussi être prélevé directement en façade au moyen de ventilateur, la régulation de l'humidité se faisant alors directement le long des échangeurs thermiques, au moyen de bac de condensat placé sous les échangeurs thermiques.The primary fresh air can also be taken directly from the facade by means of a fan, the humidity is then regulated directly along the heat exchangers, by means of a condensate pan placed under the heat exchangers.

ExempleExample

Un exemple de réalisation d'un dispositif 10 selon l'invention est représenté aux figures 1 à 4. Ce dispositif est intégré dans une façade active dans laquelle l'air est réchauffé par l'action du soleil dans un vide ventilé compris entre 2 vitrages. L'air dans le vide ventilé communique avec la pièce à climatiser par le bas de la fenêtre active, de façon à augmenter la convection naturelle au travers du dispositif, améliorant ainsi encore le débit d'air secondaire.An exemplary embodiment of a device 10 according to the invention is shown in figures 1 to 4 . This device is integrated into an active facade in which the air is heated by the action of the sun in a ventilated space between 2 panes. The air in the ventilated vacuum communicates with the room to be conditioned through the bottom of the active window, so as to increase the natural convection through the device, thus further improving the secondary air flow.

Dans ce dispositif, un conduit de distribution 12 placé en façade, apporte de l'air primaire conditionné. L'air dans ce conduit est maintenu à une pression de 410 Pa et une température d'environs 14°C. L'humidité de cet air primaire est d'environ 90%. Cet air est conditionné au moyen d'une première batterie centralisée pour l'ensemble du bâtiment. La consommation énergétique de cette première batterie, par module de climatisation est d'environs 283W pour une température extérieur de 32°C et une humidité relative de 50%.In this device, a distribution duct 12 placed on the front provides conditioned primary air. The air in this duct is maintained at a pressure of 410 Pa and a temperature of about 14 ° C. The humidity of this primary air is around 90%. This air is conditioned by means of a first centralized battery for the entire building. The energy consumption of this first battery, per air conditioning module, is around 283W for an outside temperature of 32 ° C and a relative humidity of 50%.

Cet air primaire climatisé 18 est amené par une chambre de distribution 1 à une tuyère 3 débouchant dans la première chambre d'aspiration 2. Le débit d'air primaire climatisé dans chaque module de façade est de 25m3/h.This air-conditioned primary air 18 is brought by a distribution chamber 1 to a nozzle 3 opening into the first suction chamber 2. The air-conditioned primary air flow rate in each facade module is 25 m 3 / h.

Le débit d'air primaire climatisé en sortie de la tuyère 3 aspire au travers d'un orifice 13 de l'air secondaire 17. Cet air secondaire provenant du conduit d'admission 9 passe dans un échangeur thermique 7 avant d'être mélangé à l'air primaire 18 dans la chambre d'aspiration 2. La température de l'eau de refroidissement dans cet échangeur est de 12°C en entrée et 14°C en sortie. La puissance consommée par cette batterie est d'environs 146W. L'air secondaire 17 provient d'une façade active, et entre dans l'échangeur thermique à une température de 34°C et 36% d'humidité relative. Le débit d'air secondaire 17 dans ce premier échangeur thermique 7, induit par le flux d'air primaire est de 25m3/h.The air-conditioned primary air flow at the outlet of the nozzle 3 draws secondary air 17 through an orifice 13. This secondary air coming from the intake duct 9 passes into a heat exchanger 7 before being mixed with the primary air 18 in the suction chamber 2. The temperature of the cooling water in this exchanger is 12 ° C at the inlet and 14 ° C at the outlet. The power consumed by this battery is around 146W. The secondary air 17 comes from an active facade, and enters the heat exchanger at a temperature of 34 ° C and 36% relative humidity. The secondary air flow 17 in this first heat exchanger 7, induced by the primary air flow, is 25 m 3 / h.

Le mélange 19 d'air primaire 18 et secondaire 17 induit par le premier venturi, est injecté dans une chambre 4 délimitée par une paroi 14 percée d'orifices 5 débouchant sur une seconde chambre d'aspiration 6. De l'air secondaire 16 entre dans cette seconde chambre d'aspiration 6 au travers d'un second échangeur thermique 8. L'air secondaire aspiré par le conduit 11 provient à nouveau de la façade active et présente les mêmes caractéristiques d'entrée que l'air admis par le conduit 9. Le débit d'air secondaire induit dans ce second venturi est d'environs 150m3/h.The mixture 19 of primary 18 and secondary 17 air induced by the first venturi, is injected into a chamber 4 delimited by a wall 14 pierced with orifices 5 opening onto a second suction chamber 6. Secondary air 16 enters this second suction chamber 6 through a second heat exchanger 8. The secondary air drawn in through the duct 11 again comes from the active facade and has the same inlet characteristics as the air admitted by the duct 9. The secondary air flow induced in this second venturi is around 150m 3 / h.

On obtient donc en sortie du dispositif un débit d'air de 200m3/h, pour un débit d'air primaire de 25m3/h, soit un facteur multiplicatif de 8 (ou un ratio 1:7). L'air en sortie dans cet exemple est de 18°C, pour une température ambiante de 26°C. Cet air climatisé est éjecté par l'orifice 23. An air flow rate of 200m 3 / h is therefore obtained at the outlet of the device, for a primary air flow rate of 25m 3 / h, ie a multiplying factor of 8 (or a ratio of 1: 7). The outlet air in this example is 18 ° C, for an ambient temperature of 26 ° C. This conditioned air is ejected through port 23.

Un clapet 20, 21 permet au besoin de by-passer le premier inducteur (venturi), de façon à augmenter le réduire le facteur multiplicatif du dispositif. En fonctionnement avec le clapet ouvert 21, le dépit d'air primaire passe à 50m3/h, tandis que le débit d'air secondaire induit dans le second inducteur reste constant à 150m3/h, passant d'un facteur multiplicatif de 8 à 4.A valve 20, 21 allows the need to bypass the first inductor (venturi), if necessary, so as to increase and reduce the multiplicative factor of the device. In operation with the open valve 21, the primary air despite increases to 50m 3 / h, while the secondary air flow induced in the second inductor remains constant at 150m 3 / h, passing by a multiplying factor of 8 to 4.

Le fait d'injecter l'air secondaire de façon forcée dans le vide ventilé de la façade active permet d'éviter une augmentation exagérée de la température des parois intérieures du local, ce qui améliore le confort sensitif des occupants.Forcing the secondary air into the ventilated space of the active facade prevents an exaggerated increase in the temperature of the interior walls of the room, which improves the sensory comfort of the occupants.

Les deux échangeurs thermiques 7,8 étant contigus, en pratique, on pourra utiliser un seul échangeur avec une paroi séparant les deux conduits. Néanmoins, il peut être intéressant de réguler ces deux échangeurs thermiques de façon distincte, de manière à éviter toute condensation dans la première chambre de mélange.The two heat exchangers 7,8 being contiguous, in practice, a single exchanger can be used with a wall separating the two conduits. Nevertheless, it may be advantageous to regulate these two heat exchangers separately, so as to avoid any condensation in the first mixing chamber.

Les dimensions du module de l'exemple sont compatibles avec les dimensions de fenêtres habituellement utilisées dans le bâtiment, en l'occurrence, dans cet exemple, la largeur du second échangeur thermique est de 1m, et de 25cm pour le premier échangeur. La hauteur des premier et second échangeurs thermiques est de 29cm, tandis que la hauteur totale du module (y compris le conduit de distribution 12 de l'air primaire) est de 60cm.The dimensions of the module of the example are compatible with the dimensions of windows usually used in the building, in this case, in this example, the width of the second heat exchanger is 1m, and 25cm for the first exchanger. The height of the first and second heat exchangers is 29cm, while the total height of the module (including the primary air distribution duct 12) is 60cm.

Claims (14)

  1. Air conditioning unit (10) comprising a primary air intake pipe (1) connected to the inlet of a first venturi-type device, the suction of which communicates with a first secondary air intake pipe (9), the outlet of the first venturi-type device communicating with the inlet of a second venturi-type device whereof the suction is connected to a second secondary air intake pipe (11) comprising a main heat exchanger (8), the first venturi-type device comprising a primary air inlet nozzle (3) comprising a diameter restriction at its free end, said free end opening into a suction chamber (2) communicating with the first secondary air intake pipe (9), said suction chamber (2) comprising an outlet orifice (15) opposite the outlet of said inlet nozzle, said outlet orifice (15) communicating with the inlet of the second venturi-type device, characterized in that the second venturi-type device comprises an intake chamber (4), said intake chamber (4) having a section at least twice as large as the outlet orifice (15) of the suction chamber (2).
  2. Air conditioning device (10) according to claim 1, wherein the second venturi-type device comprises a plate (14) pierced with orifices (5), said plate separating the intake chamber (4) communicating with the outlet (15) of the first mixing device and a mixing chamber (6) communicating with the second secondary air intake pipe (11), said orifices (5) producing, during use, a venturi effect suctioning the secondary air.
  3. Air conditioning device (10) according to any one of the preceding claims, wherein the first secondary air intake pipe (9) comprises a secondary heat exchanger (7).
  4. Air conditioning device (10) according to any one of the preceding claims, wherein the heat exchanger(s) comprise(s) vertical fins, and a device for discharging condensation at the bottom thereof.
  5. Air conditioning device (10) according to any one of the preceding claims, wherein an adjustable valve makes it possible to inject primary air directly at the inlet of the second venturi-type device, downstream from the first venturi device, so as to be able to adjust the total mixing ratio between the primary air and the secondary air.
  6. Façade comprising an air conditioning device (10) according to any one of the preceding claims.
  7. Façade according to claim 6, comprising two walls separated by a ventilation space, the first and second secondary air intake pipes being connected to said ventilation space.
  8. Method for air conditioning a confined place comprising the following steps:
    a. sampling outside air (18), called primary air, and bringing it to a predetermined pressure;
    b. injecting said primary air (18) into a venturi-type device, suctioning from a suction chamber (2) and mixing air from the confined place, called secondary air (17), with the primary air, the secondary air passing, before mixing, in a first heat exchanger (7) adjusted to a setpoint temperature, thus obtaining a first mixture of air (19);
    c. injecting the first mixture of air (19) into a second venturi-type device suctioning and mixing secondary air (16) with said first mixture of air (19), the secondary air passing, before mixing, in a second heat exchanger (8) adjusted to a setpoint temperature;
    d. reinjecting the obtained mixture of air into the confined place;
    characterized in that the first mixture of air (19) is compressed in an intake chamber (4) communicating with the outlet orifice (15) of the suction chamber (2), said intake chamber (4) having a section at least twice as large as the outlet orifice (15) of the suction chamber (2), so as to cause a compression of the first mixture of air (19).
  9. Method according to claim 8, wherein said predetermined pressure is between 100 and 1000 Pa.
  10. Method according to any one of claims 8 or 9, wherein the ratio between the intake of primary air and of secondary air in the first mixing device is between 0.7 and 2.5.
  11. Method according to any one of claims 8 to 10, wherein the flow rate ratio between the intake of the first mixture of air and of secondary air in the second mixing device is between 2 and 4.
  12. Method according to any one of claims 8 to 11, wherein the pressure of the first mixture of air at the inlet of the second venturi device is between 50 and 100 Pa.
  13. Method according to any one of claims 8 to 12, wherein the secondary air circulates in a ventilated space between two walls of an active façade before being suctioned through heat exchangers (7, 8).
  14. Method according to any one of claims 8 to 13, wherein the primary air sampled in step (a) is brought to a predetermined temperature before being injected into said first venturi-type device.
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ZA201507299B (en) 2017-02-22
BE1021395B1 (en) 2015-11-16
EA201591633A1 (en) 2016-02-29
US20160018128A1 (en) 2016-01-21
EP2965021A1 (en) 2016-01-13
CA2903915A1 (en) 2014-09-12
JP2016509195A (en) 2016-03-24
WO2014135406A1 (en) 2014-09-12
JP6521869B2 (en) 2019-05-29
CN105026850A (en) 2015-11-04
CN105026850B (en) 2019-02-12
SG11201507095YA (en) 2015-10-29
IN2015DN09035A (en) 2015-10-23
PH12015501923A1 (en) 2016-01-04

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