EP3749535A1 - Aeraulic and acoustic treatment system for an air management system for a vehicle - Google Patents

Aeraulic and acoustic treatment system for an air management system for a vehicle

Info

Publication number
EP3749535A1
EP3749535A1 EP19704660.0A EP19704660A EP3749535A1 EP 3749535 A1 EP3749535 A1 EP 3749535A1 EP 19704660 A EP19704660 A EP 19704660A EP 3749535 A1 EP3749535 A1 EP 3749535A1
Authority
EP
European Patent Office
Prior art keywords
air
opening
management system
vehicle
duct
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.)
Withdrawn
Application number
EP19704660.0A
Other languages
German (de)
French (fr)
Inventor
Frédéric Dupuy
Sebastien LAMAUD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
PSA Automobiles SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3749535A1 publication Critical patent/EP3749535A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00664—Construction or arrangement of damper doors
    • B60H1/00671—Damper doors moved by rotation; Grilles
    • B60H1/00685—Damper doors moved by rotation; Grilles the door being a rotating disc or cylinder or part thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00514—Details of air conditioning housings
    • B60H1/0055—Details of air conditioning housings the housing or parts thereof being integrated in other devices, e.g. dashboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00557—Details of ducts or cables
    • B60H1/00564—Details of ducts or cables of air ducts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00835—Damper doors, e.g. position control
    • B60H1/00849—Damper doors, e.g. position control for selectively commanding the induction of outside or inside air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H2001/006—Noise reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/60—Structural details of dashboards or instruments
    • B60K2360/65—Features of dashboards
    • B60K2360/658—Dashboard parts used as air ducts

Definitions

  • the invention relates, in general, the field of air treatment systems in a motor vehicle.
  • the invention relates more particularly to an acoustic treatment system of an air management system, in particular operating in a recirculation mode air from the passenger compartment of the vehicle.
  • a motor vehicle generally comprises an air management system comprising a ventilation system, for activating the circulation of air in the passenger compartment of the vehicle so as to renew the ambient air. , and a heating and / or air conditioning system, allowing a user to regulate the temperature in the passenger compartment of the vehicle.
  • an air management system comprises a housing which houses a blower or a fan for taking a flow of air through at least one air inlet provided in the housing and for evacuating the flow of air taken to the outside. the passenger compartment of the vehicle through at least one air outlet also arranged in the housing.
  • such a housing is for example provided with a recirculation air inlet through which is taken a flow of air inside the passenger compartment of the vehicle and an inlet of outside air through which is guided a flow of air from outside the vehicle.
  • the implementation of the blower itself is likely to produce sound waves. These tend to propagate inside the housing until reaching the air outlets and / or the recirculation air inlet. In this case, the sound waves propagate inside the cabin and generate noise pollution resulting in a reduction in comfort for the occupants of the vehicle.
  • the general technical problem therefore concerns the management of noise propagated in an air management system while trapping this noise in "open" areas to through which a stream of air is established.
  • the problem is complicated in that it does not necessarily disturb the aerodynamic flow that guarantees the thermal performance required.
  • the principle used in the state of the art generally consists in creating baffles forcing the fluid to meander in a conduit whose walls are covered with an acoustic absorbent material thereby reducing the acoustic waves that cross it.
  • To have a good efficiency must be able to obtain the largest absorption surface and this can lead to prohibitive volumes incompatible with the dimensions of the vehicle.
  • the distribution means between an external air flow and a recirculating air stream are generally made by a pivoting recycling flap.
  • Such a flap is disposed in an air duct.
  • the shutter is movable between an open position in which it allows the collection of a flow of recirculation air in the passenger compartment of the vehicle to supply the air management system and a closed position in which the shutter prohibits the passage of the recirculation air flow to the air management system and allows the passage of the outside air flow in the pipe between the upstream and the downstream of the shutter.
  • the outside air flow feeds the air management system and, in the open position, the outside air flow is blocked and it is the flow recycling air that is taken from the cabin and injected into the air management system.
  • the pressure losses in other words the total pressure drop due to the friction experienced by the air flow, are reduced during the transition to the operating mode in which it is the flow of air recycling. which feeds the air management system, which induces an increase in the air flow and therefore an increase in noise, the noise generated by this operating mode being particularly present in high audible frequency.
  • the opening of the recycling flap promotes the diffusion in the passenger compartment of the internal noise generated by the flow of air management system, which, meanwhile, is broadband.
  • the external air intake and the recirculation air intake therefore cause a difference in noise level between the two operating modes of the air management system.
  • whistles are generated that can be heard by passengers in the passenger compartment of the vehicle. Such a situation is detrimental to the comfort of the passengers.
  • JP5770912 discloses a vehicle air conditioning apparatus in which noise reduction measures are implemented.
  • the noise attenuation means implemented in this system require a re-adaptation of the interior of the air management system housing and have an efficiency that deserves to be improved, particularly with regard to concerns noise passing through the recirculation air inlet.
  • the invention aims to overcome at least in part these disadvantages by providing a simple, economical, efficient treatment system to reduce the noise generated by an air management system, and can adapt and / or easily fit into different practical configurations of formwork.
  • the system according to the invention also allows acoustic protection against noise from a fan or a blower, on the one hand by preventing the direct diffusion of noise, and on the other hand by allowing the air flow smoothly.
  • the present invention relates to an acoustic treatment system, intended to be implemented in the air management system of a vehicle, including a motor vehicle.
  • Said acoustic treatment system is provided with a duct, for example rigid, covering the recirculation air inlet, and whose size and shape are adapted so as to obtain equivalent pressure losses between the two. modes of operation of the air management system, said operating modes respectively corresponding to an outside air intake and an air intake to the interior, without the need for significant structural modifications of the management system air.
  • “conduit” means an extension of material capable of guiding a fluid, in particular air.
  • the present invention is an air and acoustic treatment system for an air management system of a vehicle, in particular of a motor vehicle, having a passenger compartment, said air management system.
  • said air management system further comprising u a pulser, a source of noise, emitting a sound signal in the pipe, a pipe, said pipe having a first end fixed to the pipe on one side of the opening and a second free end, leaving a passage between said pipe and said pipe; opening, said passage opening into the passenger compartment, said duct having a length adapted to overhang the opening, and, beyond, a portion of the duct, so as to create a deported recycling air intake beyond opening when said pivoting recycling flap is in the open position.
  • the conduit is rigid.
  • Said duct provides a sound wave damper function provided to deport the recycled air intake and increase the pressure losses in order to approach the outside air conditions and thus minimize the gap noise between an operating mode called “outside air”, in which the outside air flow feeds the system, and a “recycled air” operating mode, in which the recirculating air flow feeds the system.
  • the length of the duct is preferably configured to induce in the recirculating air stream pressure losses equivalent to the pressure losses induced in the outside air flow by the pipe upstream of the opening.
  • the conduit is derived from material of the pipe.
  • the conduit is an insert made integral with the pipe by means of securing means, said means of fastening being constituted by at least one of the following fastening means: interlocking, gluing, broaching, clamping, clipping.
  • the conduit comprises at least one acoustically absorbent material.
  • said absorbent material is a polymeric foam or a combination of polymer foams among the following polymer foams: polyurethane foam, ethylene-propylene-diene terpolymer foam, nonwoven felt.
  • said rigid conduit is derived from material of the pipe.
  • the conduit is an insert made integral with the pipe by means of securing means, said connecting means being constituted by at least one of the following fastening means: interlocking , collage, broaching, pinching, clipping.
  • the conduit is placed in line with the opening to be treated arranged in the pipe to allow to take a stream of recirculation air in the passenger compartment.
  • the conduit overhangs the recycling flap.
  • Said duct thus performs both a screen against a direct acoustic wave and a ventilation baffle vis-à-vis an air flow.
  • the conduit is configured in front of the blower.
  • said rigid conduit is located in the upper part of the blower.
  • the conduit is preferably integral with a housing in which is housed the blower.
  • the present invention also provides an air management system for a vehicle, comprising a pipe guiding a flow of air from outside the vehicle via an outside air intake, said pipe having an opening opening in the passenger compartment, a pivoting recycling flap moving between an open position in which said pivoting recycling flap closes the outside air intake and releases the opening, said opening forming a recirculation air intake from the passenger compartment, and a closed position in which said pivoting recycling flap closes the opening and releases the outside air intake, said air management system further comprising a pulser, a source of noise, emitting a signal sound in the pipe, said air management system further comprising an air and acoustic treatment system as briefly described above.
  • the present invention also relates to a motor vehicle comprising an air management system as briefly described above.
  • FIG. 1 a diagram of a state-of-the-art air management system, comprising a housing in external air intake mode,
  • FIG. 2 a diagram of a state-of-the-art air management system, comprising a box in the recirculated air intake mode
  • FIG. 3 is a diagram of an air management system according to a first embodiment of the invention, in an "outside air” operating mode.
  • FIG. 4 a diagram of the air management system according to the first embodiment of the invention, in a mode of operation "recirculation air”.
  • Figure 5 a diagram of a glove box and a management system of the air, according to the state of the art, arranged under the dashboard of a motor vehicle,
  • FIG. 6A a diagram of a glove box modified to implement another embodiment of the invention
  • FIG. 6B a diagram of a glove box modified to implement an alternative embodiment of the invention.
  • FIG. 7 a diagram of a dashboard modified to implement yet another alternative embodiment of the invention.
  • an air management system in a vehicle interior ie a ventilation system, heating and / or air conditioning of a motor vehicle intended to equip a motor vehicle for ventilate the cabin of the latter, comprises a housing 1, a pivoting recycling flap 3 and a blower 5 for circulating a flow of air 4 from at least one air inlet to at least one air outlet, which both are formed through the housing 1 in a pipe 2 directing the air flow 4 in a direction of flow.
  • the air outlet allows a somehowlic communication between the housing and the cabin of the vehicle.
  • the housing 1, which houses in particular the blower 5, is provided with:
  • pivoting recycling flap 3 moves between a first position (FIG. 2), called an opening, in which said pivoting recycling flap 3 closes off the outside air inlet by allowing admission to the inside of the casing 1 of the recirculating air stream 11 coming from the passenger compartment of the vehicle and a second position (FIG. 1), said closure, in which said pivoting recycling flap 3 closes the air inlet recirculation by allowing the admission of the outside air flow 4 from the outside of the vehicle inside the housing 1.
  • the pivoting recycling flap 3 closes the opening 10 arranged in the pipe to allow the admission of the recirculation air flow 11 into the housing 1, and leaves free the pipe 2 so that the outside air flow 4 supplies the housing 1.
  • the pivoting recycling flap 3 releases the opening 10 arranged in the pipe 2, so as to allow the admission of the recirculation air stream January 1 in the housing 1, while blocking the flow of outside air 4.
  • blower 5 tends to generate sound waves that are likely to penetrate inside the passenger compartment of the vehicle, in particular by via the recirculating air inlet, and as a consequence to cause noise pollution for a user present in the passenger compartment.
  • FIGs 3 and 4 there is shown several embodiments of the present invention showing different forms of duct 7 ensuring the attenuation of acoustic waves generated by the air management system .
  • the conduit 7 is preferably rigid.
  • the conduit 7 is an insert attached to the pipe 2.
  • the conduit 7 is integrated in the glove box 8 '.
  • the duct 7 is integrated in the dashboard 9 '.
  • the conduit 7 is arranged in such a way as to overhang the swiveling recycling flap 3 to deport the recirculation air intake inside the vehicle cabin, while increasing the airflow pressure drops applied to the recirculation air stream 11 conveyed to the housing 1 .
  • the conduit 7 extends away from the pivoting recycling flap 3 being carried by the housing 1 and being attached to said housing 1 by any fastening means. According to another method of attachment, the duct 7 is molded onto the casing 1.
  • FIG. 1 shows a diagram of an air management system comprising a housing 1 representative of the state of the art
  • the pivoting recycling flap 3 is shown in FIG. opening position, in other words in "recycled air” mode, thus closing the outside air intake and causing the admission of the recirculation air stream 11 under the dashboard, causing the release of the noise 6 of the blower O in the cockpit.
  • FIG. 3 shows the use of a duct 7, in accordance with the first embodiment of the invention, overhanging the entire pivoting recycling flap 3 and deporting the recycling air intake, thus making it possible to to deport the noise 6 towards the outside of the cockpit.
  • the duct 7 has a first end fixed to the duct 2 on one side of the opening 10 and a second free end, leaving a passage between said duct 7 and said opening 10, said passage opening into the passenger compartment, said duct 7 having a length adapted to overhang the opening 10, and, beyond, a portion of the pipe 2, so as to create a remote recycling air intake beyond the opening 10 when said pivoting recycling flap 3 is in the open position.
  • at least a portion of the outer surface of the duct undergoes an acoustic treatment enabling it to absorb the sound signal corresponding to the noise 6 coming out of the pipe.
  • the presence of the duct 7 has no effect on the operating mode in which the pivoting recycling flap 3 is in the closed position, that is to say when said pivoting recycling flap 3 closes the recirculating air intake and allows admission of the outside air flow coming from the outside of the vehicle (operating mode called "outside air” of the management system of the vehicle). air).
  • operating mode called "outside air” of the management system of the vehicle. air
  • the conduit 7 makes no change.
  • the conduit 7 is a sound wave damper provided to deport the recirculation air intake.
  • the duct 7 also makes it possible to increase the pressure losses experienced by the recirculating air flow 11 in order to approach those experienced by the outside air flow 4 when it is said outside air flow 4 that feeds the air management system, so as to minimize the noise gap 6 between the "outside air” and "recirculated air” modes.
  • the air management system comprises in particular a blower 5 and is integrated in an assembly comprising a dashboard 9 and a glove box 8.
  • the pivoting recycling flap 3 is open, the recycling air intake being then under the dashboard 9.
  • the pressure losses are reduced compared to the operating mode in which the outside air flow feeds the system, which causes an increase in air velocities and therefore noise 6.
  • noise 6 is also generated by the blower 5 and released in the reasoning cavity defined by the above, by the dashboard 9 and from below, by the glove box 8, and opens directly into the passenger compartment of the motor vehicle. Noise pollution is therefore important for the passengers of the vehicle.
  • the pipe 2 is delimited by the glove box 8 'and / or the dashboard 9'.
  • the duct 7 is configured to cap the pivoting recycling flap 3 by providing a passage to the recirculating air flow 11 and the outside air flow 4.
  • the conduit 7 is molded respectively with the glove box 8 'or with the dashboard 9'.
  • the duct 7 completely overhangs the area of the pivoting recycling flap 3 so as at the same time to cap the blower 5 so as to form a screen vis-à-vis a direct acoustic wave produced by said blower 5 and an air flow baffle with respect to an air flow generated by said blower 5.
  • the configuration of the duct 7 is depending on the position of the pivoting recycling flap 3 in the upper part or at the front of the blower 5.
  • the length and / or the shape of the duct 7 are preferably configured so as to generate, with respect to the recirculation air stream 1 1, appropriate pressure losses of such that, with respect to an air flow coming from the outside and guided in the pipe to the blower 5, there is the same loss of charges.
  • the duct 7 comprises one or more acoustic absorbing materials to further reduce the acoustic waves that pass through or to contain the noise 6 may pass through the opening of the pivoting recycling flap 3.
  • the absorbent materials added are a polymeric foam such as a polyurethane foam, an ethylene-propylene-diene terpolymer foam, a non-woven felt or any other material having absorption characteristics. sound waves.
  • Such an a Vogellic and acoustic treatment system according to the invention advantageously makes it possible to guarantee a level of homogeneous noise between the mode of operation in which the outside air flow 4 supplies the vehicle's air management system and the mode of operation in which the recirculation air stream 11 supplies the vehicle's air management system.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention relates to an aeraulic and acoustic treatment system for an air management system of a vehicle, comprising a duct (2) guiding an outside air flow or a recycling air flow (11) from the interior of the vehicle via an opening (10) made in said duct (2) and opening into the interior, a pivoting recycling flap (3) moving between an opening position and a closing position, said air management system also comprising a source of noise (6) emitting a sound signal in the duct (2), and a conduit (7), said conduit (7) having a first end attached to the duct (2) on one side of the opening (10) and a second free end, leaving a passage between said conduit (7) and said opening (10), said passage opening into the interior, said conduit (7) being long enough to extend over the opening (10), and beyond, over a portion of the duct (2), in such a way as to create a recycling air intake off-centre beyond the opening (10) when said pivoting recycling flap (3) is in the opening position.

Description

SYSTEME DE TRAITEMENT AERAULIQUE ET ACOUSTIQUE POUR UN SYSTEME DE  AERAULIC AND ACOUSTIC PROCESSING SYSTEM FOR A SYSTEM OF
GESTION DE L’AIR DE VEHICULE  VEHICLE AIR MANAGEMENT
[0001] L'invention concerne, de façon générale, le domaine des systèmes de traitement de l’air dans un véhicule automobile. The invention relates, in general, the field of air treatment systems in a motor vehicle.
[0002] L’invention porte plus particulièrement sur un système de traitement acoustique d’un système de gestion de l’air, en particulier fonctionnant dans un mode de recyclage d’air issu de l’habitacle du véhicule. The invention relates more particularly to an acoustic treatment system of an air management system, in particular operating in a recirculation mode air from the passenger compartment of the vehicle.
[0003] De manière générale, un véhicule automobile comprend généralement un système de gestion de l’air comprenant un système de ventilation, permettant d’activer la circulation de l’air dans l’habitacle du véhicule de façon à renouveler l’air ambiant, et un système de chauffage et/ou de climatisation, permettant à un utilisateur de réguler la température dans l’habitacle du véhicule. Un tel système de gestion de l’air comprend un boîtier qui loge un pulseur ou un ventilateur pour prélever un flux d’air à travers au moins une entrée d’air aménagée dans le boîtier et pour évacuer le flux d’air prélevé vers l’habitacle du véhicule à travers au moins une sortie d’air également aménagée dans le boîtier. In general, a motor vehicle generally comprises an air management system comprising a ventilation system, for activating the circulation of air in the passenger compartment of the vehicle so as to renew the ambient air. , and a heating and / or air conditioning system, allowing a user to regulate the temperature in the passenger compartment of the vehicle. Such an air management system comprises a housing which houses a blower or a fan for taking a flow of air through at least one air inlet provided in the housing and for evacuating the flow of air taken to the outside. the passenger compartment of the vehicle through at least one air outlet also arranged in the housing.
[0004] Comme cela est connu, un tel boîtier est par exemple muni d’une entrée d’air de recyclage à travers laquelle est prélevé un flux d’air à l’intérieur de l’habitacle du véhicule et d’une entrée d’air extérieur à travers laquelle est guidé un flux d’air en provenance de l’extérieur du véhicule. As is known, such a housing is for example provided with a recirculation air inlet through which is taken a flow of air inside the passenger compartment of the vehicle and an inlet of outside air through which is guided a flow of air from outside the vehicle.
[0005] Or, d’abord, la mise en oeuvre du pulseur lui-même est susceptible de produire des ondes sonores. Ces dernières tendent à se propager à l’intérieur du boîtier jusqu’à atteindre les sorties d’air et/ou l’entrée d’air de recyclage. Dans ce cas, les ondes sonores se propagent à l’intérieur de l’habitacle et génèrent des nuisances sonores ayant pour conséquence une réduction du confort pour les occupants du véhicule. However, first, the implementation of the blower itself is likely to produce sound waves. These tend to propagate inside the housing until reaching the air outlets and / or the recirculation air inlet. In this case, the sound waves propagate inside the cabin and generate noise pollution resulting in a reduction in comfort for the occupants of the vehicle.
[0006] En outre, il est de toute évidence indispensable de laisser circuler l’air dans le système de gestion de l’air, de façon à permettre un renouvellement de l’air de l’habitacle, de sorte que l’encoffrage complet des sources acoustiques internes en vue de minimiser l’inconfort des passagers est impossible. In addition, it is obviously essential to let the air circulate in the air management system, so as to allow a renewal of the air of the passenger compartment, so that the complete formwork internal acoustic sources to minimize the discomfort of passengers is impossible.
[0007] Le problème technique général concerne donc la gestion du bruit propagé dans un système de gestion de l’air tout en piégeant ce bruit dans des zones « ouvertes » à travers lesquelles un courant d’air est établi. Le problème est rendu complexe dans la mesure où il ne faut pas pour autant perturber l’écoulement aérodynamique qui garantit les performances thermiques demandées. The general technical problem therefore concerns the management of noise propagated in an air management system while trapping this noise in "open" areas to through which a stream of air is established. The problem is complicated in that it does not necessarily disturb the aerodynamic flow that guarantees the thermal performance required.
[0008] Pour résoudre ce problème, le principe utilisé dans l’état de l’art consiste généralement à créer des chicanes obligeant le fluide à serpenter dans un conduit dont les parois sont recouvertes d’une matière absorbante acoustique permettant ainsi d’atténuer les ondes acoustiques qui le traversent. Pour avoir une bonne efficacité il faut pouvoir obtenir la plus grande surface d’absorption et cela peut conduire à des volumes rédhibitoires incompatibles avec les dimensions du véhicule. To solve this problem, the principle used in the state of the art generally consists in creating baffles forcing the fluid to meander in a conduit whose walls are covered with an acoustic absorbent material thereby reducing the acoustic waves that cross it. To have a good efficiency must be able to obtain the largest absorption surface and this can lead to prohibitive volumes incompatible with the dimensions of the vehicle.
[0009] Par ailleurs, il est également connu que les moyens de répartition entre un flux d’air extérieur et un flux d’air de recyclage sont généralement réalisés par un volet de recyclage pivotant. Furthermore, it is also known that the distribution means between an external air flow and a recirculating air stream are generally made by a pivoting recycling flap.
[0010] Un tel volet est disposé dans une canalisation d’air. Le volet est mobile entre une position d’ouverture dans laquelle il autorise le prélèvement d’un flux d’air de recyclage dans l’habitacle du véhicule pour alimenter le système de gestion de l’air et une position de fermeture dans laquelle le volet interdit le passage du flux d’air de recyclage vers le système de gestion de l’air et autorise le passage du flux d’air extérieur dans la canalisation entre l’amont et l’aval du volet. Such a flap is disposed in an air duct. The shutter is movable between an open position in which it allows the collection of a flow of recirculation air in the passenger compartment of the vehicle to supply the air management system and a closed position in which the shutter prohibits the passage of the recirculation air flow to the air management system and allows the passage of the outside air flow in the pipe between the upstream and the downstream of the shutter.
[0011] Par conséquent, dans la position de fermeture, le flux d’air extérieur alimente le système de gestion de l’air et, dans la position d’ouverture, le flux d’air extérieur est bloqué et c’est le flux d’air de recyclage qui est prélevé dans l’habitacle et injecté dans le système de gestion de l’air. Therefore, in the closed position, the outside air flow feeds the air management system and, in the open position, the outside air flow is blocked and it is the flow recycling air that is taken from the cabin and injected into the air management system.
[0012] Or, les pertes de charge, autrement dit la chute de pression totale due aux frottements subis par le flux d’air, sont réduites lors du passage dans le mode de fonctionnement dans lequel c’est le flux d’air de recyclage qui alimente le système de gestion de l’air, ce qui induit une augmentation du débit d’air et donc une augmentation du bruit, le bruit généré par ce mode de fonctionnement étant particulièrement présent en haute fréquence audible. En outre, l’ouverture du volet de recyclage favorise la diffusion dans l’habitacle du bruit interne généré par le flux système de gestion de l’air qui, quant à lui, est large bande. [0013] La prise d’air extérieur et la prise d’air de recyclage entraînent par conséquent une différence de niveau de bruit entre les deux modes de fonctionnement du système de gestion de l’air. En particulier, des sifflements sont générés qui peuvent être entendus par les passagers installés dans l’habitacle du véhicule. Une telle situation nuit au confort des passagers. A ce titre, le document JP5770912 décrit un appareil de climatisation de véhicule dans lequel des mesures de réduction du bruit sont mises en oeuvre. However, the pressure losses, in other words the total pressure drop due to the friction experienced by the air flow, are reduced during the transition to the operating mode in which it is the flow of air recycling. which feeds the air management system, which induces an increase in the air flow and therefore an increase in noise, the noise generated by this operating mode being particularly present in high audible frequency. In addition, the opening of the recycling flap promotes the diffusion in the passenger compartment of the internal noise generated by the flow of air management system, which, meanwhile, is broadband. The external air intake and the recirculation air intake therefore cause a difference in noise level between the two operating modes of the air management system. In particular, whistles are generated that can be heard by passengers in the passenger compartment of the vehicle. Such a situation is detrimental to the comfort of the passengers. As such, JP5770912 discloses a vehicle air conditioning apparatus in which noise reduction measures are implemented.
[0014] Cependant, les moyens d’atténuation du bruit mis en oeuvre dans ce système nécessitent une réadaptation de l’intérieur du boîtier du système de gestion de l’air et présentent une efficacité qui mérite d’être perfectionnée, notamment en ce qui concerne le bruit franchissant l’entrée d’air de recyclage. However, the noise attenuation means implemented in this system require a re-adaptation of the interior of the air management system housing and have an efficiency that deserves to be improved, particularly with regard to concerns noise passing through the recirculation air inlet.
[0015] L’invention vise donc à pallier au moins en partie ces inconvénients en proposant un système de traitement simple, économique, efficace pour réduire le bruit généré par un système de gestion de l’air, et pouvant s’adapter et/ou s’insérer facilement dans différentes configurations pratiques d’encoffrage. Le système selon l’invention permet en outre une protection acoustique vis-à-vis du bruit provenant d’un ventilateur ou d’un pulseur, d’une part en empêchant la diffusion directe du bruit, et d’autre part en permettant à l’air de s’écouler avec fluidité. The invention aims to overcome at least in part these disadvantages by providing a simple, economical, efficient treatment system to reduce the noise generated by an air management system, and can adapt and / or easily fit into different practical configurations of formwork. The system according to the invention also allows acoustic protection against noise from a fan or a blower, on the one hand by preventing the direct diffusion of noise, and on the other hand by allowing the air flow smoothly.
[0016] Pour parvenir à ce résultat, la présente invention concerne un système de traitement acoustique, destiné à être mis en oeuvre dans le système de gestion de l’air d’un véhicule, notamment d’un véhicule automobile. To achieve this result, the present invention relates to an acoustic treatment system, intended to be implemented in the air management system of a vehicle, including a motor vehicle.
[0017] Grâce à un tel système de traitement, on assure notamment un niveau de bruit homogène entre la prise d’air à l’extérieur ou la prise d’air à l’intérieur du véhicule. With such a treatment system, it ensures in particular a level of homogeneous noise between the outside air intake or the air intake inside the vehicle.
[0018] Ledit système de traitement acoustique est muni d’un conduit, par exemple rigide, coiffant l’entrée d’air de recyclage, et dont la taille et la forme sont adaptées de manière à obtenir des pertes de charges équivalentes entre les deux modes de fonctionnement du système de gestion de l’air, lesdits modes de fonctionnement correspondant respectivement à une prise d’air à l’extérieur et à une prise d’air à l’intérieure, sans nécessité de modifications structurelles conséquentes du système de gestion de l’air. Il est à noter que par « conduit », on entend une extension de matière apte à guider un fluide, en particulier de l’air. [0019] Plus précisément, la présente invention vise un système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule, notamment d’un véhicule automobile, présentant un habitacle, ledit système de gestion de l’air comprenant une canalisation guidant un flux d’air extérieur venant de l’extérieur du véhicule via une prise d’air extérieur ou un flux d’air de recyclage issu de l’habitacle via une ouverture aménagée dans ladite canalisation présentant une ouverture et débouchant dans l’habitacle, un volet de recyclage pivotant se déplaçant entre une position d’ouverture dans laquelle ledit volet de recyclage pivotant obture la prise d’air extérieur et libère l’ouverture, ladite ouverture formant une prise d’air de recyclage issu de l’habitacle, et une position de fermeture dans laquelle ledit volet de recyclage pivotant obture l’ouverture et libère la prise d’air extérieur, ledit système de gestion de l’air comprenant par ailleurs un pulseur, source de bruit, émettant un signal sonore dans la canalisation, un conduit, ledit conduit présentant une première extrémité fixée à la canalisation d’un côté de l’ouverture et une deuxième extrémité libre, laissant un passage entre ledit conduit et ladite ouverture, ledit passage débouchant dans l’habitacle, ledit conduit présentant une longueur adaptée pour surplomber l’ouverture, et, au-delà, une portion de la canalisation, de façon à créer une prise d’air de recyclage déportée au-delà de l’ouverture lorsque ledit volet de recyclage pivotant est dans la position d’ouverture. Said acoustic treatment system is provided with a duct, for example rigid, covering the recirculation air inlet, and whose size and shape are adapted so as to obtain equivalent pressure losses between the two. modes of operation of the air management system, said operating modes respectively corresponding to an outside air intake and an air intake to the interior, without the need for significant structural modifications of the management system air. It should be noted that "conduit" means an extension of material capable of guiding a fluid, in particular air. More specifically, the present invention is an air and acoustic treatment system for an air management system of a vehicle, in particular of a motor vehicle, having a passenger compartment, said air management system. comprising a pipe guiding an outside air flow coming from the outside of the vehicle via an outside air intake or a recirculating air flow coming from the passenger compartment through an opening in said pipe having an opening and opening into the passenger compartment, a pivoting recycling flap moving between an open position in which said pivoting recycling flap closes the outside air intake and releases the opening, said opening forming a recirculation air intake resulting from the cockpit, and a closed position in which said pivoting recycling flap closes the opening and releases the outside air intake, said air management system further comprising u a pulser, a source of noise, emitting a sound signal in the pipe, a pipe, said pipe having a first end fixed to the pipe on one side of the opening and a second free end, leaving a passage between said pipe and said pipe; opening, said passage opening into the passenger compartment, said duct having a length adapted to overhang the opening, and, beyond, a portion of the duct, so as to create a deported recycling air intake beyond opening when said pivoting recycling flap is in the open position.
[0020] Avantageusement, le conduit est rigide. Advantageously, the conduit is rigid.
[0021] Ledit conduit assure une fonction d’amortisseur d’ondes sonores prévu pour déporter l’entrée d’air recyclé et augmenter les pertes de charge afin de s’approcher des conditions d’air extérieur et ainsi réduire au maximum l’écart de bruit entre un mode de fonctionnement dit « air extérieur », dans lequel le flux d’air extérieur alimente le système, et un mode de fonctionnement « air recyclé », dans lequel le flux d’air de recyclage alimente le système. Said duct provides a sound wave damper function provided to deport the recycled air intake and increase the pressure losses in order to approach the outside air conditions and thus minimize the gap noise between an operating mode called "outside air", in which the outside air flow feeds the system, and a "recycled air" operating mode, in which the recirculating air flow feeds the system.
[0022] La longueur du conduit est de préférence configurée pour induire dans le flux d’air de recyclage des pertes de charge équivalentes aux pertes de charge induites dans le flux d’air extérieur par la canalisation en amont de l’ouverture. The length of the duct is preferably configured to induce in the recirculating air stream pressure losses equivalent to the pressure losses induced in the outside air flow by the pipe upstream of the opening.
[0023] Selon un mode de réalisation, le conduit est issu de matière de la canalisation. According to one embodiment, the conduit is derived from material of the pipe.
[0024] Selon un mode de réalisation, le conduit est une pièce rapportée rendu solidaire de la canalisation par l’intermédiaire de moyens de solidarisation, lesdits moyens de solidarisation étant constitués de l’un quelconque au moins des moyens de solidarisation suivants : emboîtement, collage, brochage, pinçage, clipsage. According to one embodiment, the conduit is an insert made integral with the pipe by means of securing means, said means of fastening being constituted by at least one of the following fastening means: interlocking, gluing, broaching, clamping, clipping.
[0025] Selon l’invention, le conduit comprend au moins un matériau acoustiquement absorbant. Par exemple, ledit matériau absorbant est une mousse polymère ou une combinaison de mousses de polymère parmi les mousses de polymère suivantes : une mousse de polyuréthane, une mousse de terpolymère d’éthylène-propylène-diène, un feutre non tissé. According to the invention, the conduit comprises at least one acoustically absorbent material. For example, said absorbent material is a polymeric foam or a combination of polymer foams among the following polymer foams: polyurethane foam, ethylene-propylene-diene terpolymer foam, nonwoven felt.
[0026] Selon une forme de réalisation, ledit conduit rigide est issu de matière de la canalisation. According to one embodiment, said rigid conduit is derived from material of the pipe.
[0027] Selon une autre forme de réalisation, le conduit est une pièce rapportée rendu solidaire de la canalisation par l’intermédiaire de moyens de solidarisation, lesdits moyens de solidarisation étant constitués de l’un quelconque au moins des moyens de solidarisation suivants : emboîtement, collage, brochage, pinçage, clipsage. According to another embodiment, the conduit is an insert made integral with the pipe by means of securing means, said connecting means being constituted by at least one of the following fastening means: interlocking , collage, broaching, pinching, clipping.
[0028] Le conduit est placé à l’aplomb de l’ouverture à traiter aménagée dans la canalisation pour permettre de prélever un flux d’air de recyclage dans l’habitacle. Autrement dit, le conduit surplombe le volet de recyclage. Ledit conduit réalise ainsi à la fois un paravent vis-à-vis d’une onde acoustique directe et une chicane aéraulique vis-à- vis d’un écoulement d’air. The conduit is placed in line with the opening to be treated arranged in the pipe to allow to take a stream of recirculation air in the passenger compartment. In other words, the conduit overhangs the recycling flap. Said duct thus performs both a screen against a direct acoustic wave and a ventilation baffle vis-à-vis an air flow.
[0029] Selon une variante de réalisation, le conduit est configuré à l’avant du pulseur. Selon une autre variante de réalisation, ledit conduit rigide est situé en partie supérieure du pulseur. Le conduit fait de préférence partie intégrante d’un boîtier dans lequel est logé le pulseur. According to an alternative embodiment, the conduit is configured in front of the blower. According to another embodiment, said rigid conduit is located in the upper part of the blower. The conduit is preferably integral with a housing in which is housed the blower.
[0030] La présente invention vise aussi un système de gestion de l’air pour un véhicule, comprenant une canalisation guidant un flux d’air venant de l’extérieur du véhicule via une prise d’air extérieur, ladite canalisation présentant une ouverture débouchant dans l’habitacle, un volet de recyclage pivotant se déplaçant entre une position d’ouverture dans laquelle ledit volet de recyclage pivotant obture la prise d’air extérieur et libère l’ouverture, ladite ouverture formant une prise d’air de recyclage issu de l’habitacle, et une position de fermeture dans laquelle ledit volet de recyclage pivotant obture l’ouverture et libère la prise d’air extérieur, ledit système de gestion de l’air comprenant par ailleurs un pulseur, source de bruit, émettant un signal sonore dans la canalisation, ledit système de gestion de l’air comprenant par ailleurs un système de traitement aéraulique et acoustique tel que brièvement décrit ci-dessus. The present invention also provides an air management system for a vehicle, comprising a pipe guiding a flow of air from outside the vehicle via an outside air intake, said pipe having an opening opening in the passenger compartment, a pivoting recycling flap moving between an open position in which said pivoting recycling flap closes the outside air intake and releases the opening, said opening forming a recirculation air intake from the passenger compartment, and a closed position in which said pivoting recycling flap closes the opening and releases the outside air intake, said air management system further comprising a pulser, a source of noise, emitting a signal sound in the pipe, said air management system further comprising an air and acoustic treatment system as briefly described above.
[0031] La présente invention vise également un véhicule automobile comprenant un système de gestion de l’air tel que brièvement décrit ci-dessus. The present invention also relates to a motor vehicle comprising an air management system as briefly described above.
[0032] D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée des modes de réalisation de l'invention, données à titre d'exemple uniquement, et en référence aux dessins qui montrent : Other features and advantages of the invention will appear on reading the detailed description of the embodiments of the invention, given by way of example only, and with reference to the drawings which show:
• la figure 1 , un schéma d’un système de gestion de l’air selon l’état de l’art, comprenant un boîtier en mode prise d’air extérieur, FIG. 1, a diagram of a state-of-the-art air management system, comprising a housing in external air intake mode,
• la figure 2, un schéma d’un système de gestion de l’air selon l’état de l’art, comprenant un boîtier en mode prise d’air recyclé, FIG. 2, a diagram of a state-of-the-art air management system, comprising a box in the recirculated air intake mode,
• la figure 3, un schéma d’un système de gestion de l’air selon un premier mode de réalisation de l’invention, dans un mode de fonctionnement « air extérieur » FIG. 3 is a diagram of an air management system according to a first embodiment of the invention, in an "outside air" operating mode.
• la figure 4, un schéma du système de gestion de l’air selon le premier mode de réalisation de l’invention, dans un mode de fonctionnement « air de recyclage ». • Figure 4, a diagram of the air management system according to the first embodiment of the invention, in a mode of operation "recirculation air".
• la figure 5, un schéma d’une boîte à gants et d’un système de gestion de l’air, selon l’état de l’art, disposés sous la planche de bord d’un véhicule automobile, • Figure 5, a diagram of a glove box and a management system of the air, according to the state of the art, arranged under the dashboard of a motor vehicle,
• la figure 6A, un schéma d’une boîte à gants modifiée pour mettre en oeuvre une autre forme de réalisation de l’invention, FIG. 6A, a diagram of a glove box modified to implement another embodiment of the invention,
• la figure 6B, un schéma d’une boîte à gants modifiée pour mettre en oeuvre une forme de réalisation alternative de l’invention, et FIG. 6B, a diagram of a glove box modified to implement an alternative embodiment of the invention, and
• la figure 7, un schéma d’une planche de bord modifiée pour mettre en oeuvre encore une autre forme de réalisation alternative de l’invention. • Figure 7, a diagram of a dashboard modified to implement yet another alternative embodiment of the invention.
[0033] Dans ce qui va suivre, les modes de réalisation décrits s’attachent plus particulièrement à une mise en oeuvre d’un système de traitement aéraulique et acoustique selon l’invention au sein d’un véhicule automobile. Cependant, toute mise en oeuvre dans un contexte différent, en particulier dans tout type de véhicule, est également visée par la présente invention. [0034] En référence à la figure 1 , un système de gestion de l’air dans un habitacle de véhicule, autrement dit un système de ventilation, de chauffage et/ou de climatisation d’un véhicule automobile destiné à équiper un véhicule automobile pour aérer l’habitacle de ce dernier, comprend un boîtier 1 , un volet de recyclage pivotant 3 et un pulseur 5 pour faire circuler un flux d’air 4 depuis au moins une entrée d’air vers au moins une sortie d’air, qui sont l’une et l’autre ménagées à travers le boîtier 1 dans une canalisation 2 dirigeant le flux d’air 4 selon une direction d’écoulement. La sortie d’air permet une communication aéraulique entre le boîtier et l’habitacle du véhicule. In what follows, the described embodiments focus more particularly on an implementation of a ventilation and acoustic treatment system according to the invention within a motor vehicle. However, any implementation in a different context, in particular in any type of vehicle, is also covered by the present invention. Referring to Figure 1, an air management system in a vehicle interior, ie a ventilation system, heating and / or air conditioning of a motor vehicle intended to equip a motor vehicle for ventilate the cabin of the latter, comprises a housing 1, a pivoting recycling flap 3 and a blower 5 for circulating a flow of air 4 from at least one air inlet to at least one air outlet, which both are formed through the housing 1 in a pipe 2 directing the air flow 4 in a direction of flow. The air outlet allows aeraulic communication between the housing and the cabin of the vehicle.
[0035] Plus particulièrement, le boîtier 1 , qui loge notamment le pulseur 5, est muni : More particularly, the housing 1, which houses in particular the blower 5, is provided with:
- d’une entrée d’air extérieur à travers laquelle un flux d’air extérieur 4 en provenance de l’extérieur du véhicule est susceptible d’être admis à l’intérieur du boîtier 1 , an outside air inlet through which an outside air flow 4 coming from the outside of the vehicle can be admitted inside the housing 1,
- d’une entrée d’air de recyclage à travers laquelle un flux d’air de recyclage 11 en provenance de l’habitacle du véhicule est susceptible d’être admis à l’intérieur du boîtier 1. - A recycling air inlet through which a flow of recirculation air 11 from the passenger compartment of the vehicle is likely to be admitted inside the housing 1.
[0036] Par ailleurs, le volet de recyclage pivotant 3 se déplace entre une première position (figure 2), dite d’ouverture, dans laquelle ledit volet de recyclage pivotant 3 obture l’entrée d’air extérieur en autorisant l’admission à l’intérieur du boîtier 1 du flux d’air de recyclage 11 en provenance de l’habitacle du véhicule et une deuxième position (figure 1 ), dite de fermeture, dans laquelle ledit volet de recyclage pivotant 3 obture l’entrée d’air de recyclage en autorisant l’admission du flux d’air extérieur 4 en provenance de l’extérieur du véhicule à l’intérieur du boîtier 1. Furthermore, the pivoting recycling flap 3 moves between a first position (FIG. 2), called an opening, in which said pivoting recycling flap 3 closes off the outside air inlet by allowing admission to the inside of the casing 1 of the recirculating air stream 11 coming from the passenger compartment of the vehicle and a second position (FIG. 1), said closure, in which said pivoting recycling flap 3 closes the air inlet recirculation by allowing the admission of the outside air flow 4 from the outside of the vehicle inside the housing 1.
[0037] Autrement dit, dans la position de fermeture, le volet de recyclage pivotant 3 obture l’ouverture 10 aménagée dans la canalisation pour permettre l’admission du flux d’air de recyclage 11 dans le boîtier 1 , et laisse libre la canalisation 2 de sorte que le flux d’air extérieur 4 alimente le boîtier 1. In other words, in the closed position, the pivoting recycling flap 3 closes the opening 10 arranged in the pipe to allow the admission of the recirculation air flow 11 into the housing 1, and leaves free the pipe 2 so that the outside air flow 4 supplies the housing 1.
[0038] Dans la position d’ouverture, le volet de recyclage pivotant 3 libère l’ouverture 10 aménagée dans la canalisation 2, de façon à permettre l’admission du flux d’air de recyclage 1 1 dans le boîtier 1 , tout en bloquant le flux d’air extérieur 4. In the open position, the pivoting recycling flap 3 releases the opening 10 arranged in the pipe 2, so as to allow the admission of the recirculation air stream January 1 in the housing 1, while blocking the flow of outside air 4.
[0039] La mise en oeuvre du pulseur 5 tend à générer des ondes sonores qui sont susceptibles de pénétrer à l’intérieur de l’habitacle du véhicule, notamment par l’intermédiaire de l’entrée d’air de recyclage, et en conséquence de provoquer des nuisances sonores pour un utilisateur présent dans l’habitacle. The implementation of the blower 5 tends to generate sound waves that are likely to penetrate inside the passenger compartment of the vehicle, in particular by via the recirculating air inlet, and as a consequence to cause noise pollution for a user present in the passenger compartment.
[0040] Sur les figures 3, 4, 6A, 6B et 7, il est représenté plusieurs modes de réalisation de la présente invention montrant différentes formes de conduit 7 assurant l’atténuation des ondes acoustiques générées par le système de gestion de l’air. Le conduit 7 est de préférence rigide. Sur les figures 3 et 4, le conduit 7 est une pièce rapportée fixée à la canalisation 2. Sur les figures 6A, 6B le conduit 7 est intégré à la boîte à gants 8’. Sur la figure 7, le conduit 7 est intégré à la planche de bord 9’. In Figures 3, 4, 6A, 6B and 7, there is shown several embodiments of the present invention showing different forms of duct 7 ensuring the attenuation of acoustic waves generated by the air management system . The conduit 7 is preferably rigid. In Figures 3 and 4, the conduit 7 is an insert attached to the pipe 2. In Figures 6A, 6B the conduit 7 is integrated in the glove box 8 '. In Figure 7, the duct 7 is integrated in the dashboard 9 '.
[0041] Selon des variantes de réalisation de la présente invention respectivement illustrées d’une part sur les figures 3 et 4, sur les figures 6A et 6B, et d’autre part sur la figure 7, le conduit 7 est agencé de façon à surplomber le volet de recyclage pivotant 3 pour déporter la prise d’air de recyclage à l’intérieur de l’habitacle du véhicule, tout en augmentant les pertes de charge aérauliques appliquées au flux d’air de recyclage 11 acheminé jusqu’au boîtier 1. According to alternative embodiments of the present invention respectively illustrated on the one hand in FIGS. 3 and 4, in FIGS. 6A and 6B, and on the other hand in FIG. 7, the conduit 7 is arranged in such a way as to overhang the swiveling recycling flap 3 to deport the recirculation air intake inside the vehicle cabin, while increasing the airflow pressure drops applied to the recirculation air stream 11 conveyed to the housing 1 .
[0042] Le conduit 7 s’étend à distance du volet de recyclage pivotant 3 en étant porté par le boîtier 1 et en étant attaché audit boîtier 1 par tout moyen de fixation. Selon un autre mode de fixation, le conduit 7 est rapporté par moulage sur le boîtier 1. The conduit 7 extends away from the pivoting recycling flap 3 being carried by the housing 1 and being attached to said housing 1 by any fastening means. According to another method of attachment, the duct 7 is molded onto the casing 1.
[0043] A contrario, en référence à la figure 2, qui montre un schéma d’un système de gestion de l’air comprenant un boîtier 1 représentatif de l’état de l’art, le volet de recyclage pivotant 3 est représenté en position d’ouverture, autrement dit en mode « air recyclé », obturant ainsi l’entrée d’air extérieur et entraînant l’admission du flux d’air de recyclage 11 sous la planche de bord, provoquant la libération du bruit 6 du pulseur ô dans l’habitacle. Conversely, with reference to Figure 2, which shows a diagram of an air management system comprising a housing 1 representative of the state of the art, the pivoting recycling flap 3 is shown in FIG. opening position, in other words in "recycled air" mode, thus closing the outside air intake and causing the admission of the recirculation air stream 11 under the dashboard, causing the release of the noise 6 of the blower O in the cockpit.
[0044] La figure 3 montre la mise en oeuvre d’un conduit 7, conformément au premier mode de réalisation de l’invention, surplombant la totalité du volet de recyclage pivotant 3 et déportant la prise d’air de recyclage, permettant ainsi de déporter le bruit 6 vers l’extérieur de l’habitacle. Le conduit 7 présente une première extrémité fixée à la canalisation 2 d’un côté de l’ouverture 10 et une deuxième extrémité libre, laissant un passage entre ledit conduit 7 et ladite ouverture 10, ledit passage débouchant dans l’habitacle, ledit conduit 7 présentant une longueur adaptée pour surplomber l’ouverture 10, et, au-delà, une portion de la canalisation 2, de façon à créer une prise d’air de recyclage déportée au-delà de l’ouverture 10 lorsque ledit volet de recyclage pivotant 3 est dans la position d’ouverture. [0045] En outre, selon un mode de réalisation, une portion au moins de la surface extérieure du conduit subit un traitement acoustique lui permettant d’absorber le signal sonore correspondant au bruit 6 sortant de la canalisation. FIG. 3 shows the use of a duct 7, in accordance with the first embodiment of the invention, overhanging the entire pivoting recycling flap 3 and deporting the recycling air intake, thus making it possible to to deport the noise 6 towards the outside of the cockpit. The duct 7 has a first end fixed to the duct 2 on one side of the opening 10 and a second free end, leaving a passage between said duct 7 and said opening 10, said passage opening into the passenger compartment, said duct 7 having a length adapted to overhang the opening 10, and, beyond, a portion of the pipe 2, so as to create a remote recycling air intake beyond the opening 10 when said pivoting recycling flap 3 is in the open position. In addition, according to one embodiment, at least a portion of the outer surface of the duct undergoes an acoustic treatment enabling it to absorb the sound signal corresponding to the noise 6 coming out of the pipe.
[0046] Toujours en référence à la figure 3, la présence du conduit 7 n’a pas d’effet sur le mode de fonctionnement dans lequel le volet de recyclage pivotant 3 est en position de fermeture, c’est-à-dire lorsque ledit volet de recyclage pivotant 3 obture l’entrée d’air de recyclage et autorise l’admission du flux d’air extérieur en provenance de l’extérieur du véhicule (mode de fonctionnement dit « air extérieur » du système de gestion de l’air). Dans ce mode de fonctionnement, le conduit 7 n’apporte aucun changement. Still with reference to Figure 3, the presence of the duct 7 has no effect on the operating mode in which the pivoting recycling flap 3 is in the closed position, that is to say when said pivoting recycling flap 3 closes the recirculating air intake and allows admission of the outside air flow coming from the outside of the vehicle (operating mode called "outside air" of the management system of the vehicle). air). In this operating mode, the conduit 7 makes no change.
[0047] En revanche, en référence à la figure 4, lorsque le volet de recyclage pivotant 3 est en position d’ouverture, c’est-à-dire lorsque ledit volet de recyclage pivotant 3 obture l’entrée d’air extérieur et autorise l’admission du flux d’air de recyclage 11 en provenance de l’habitacle du véhicule dans le boîtier 1 (mode de fonctionnement dit « air recyclé » du système de gestion de l’air), la prise d’air de recyclage est déportée vers l’extrémité libre du conduit 7. However, with reference to Figure 4, when the pivoting recycling flap 3 is in the open position, that is to say when said pivoting recycling flap 3 closes the outside air inlet and authorizes the admission of the recirculation air stream 11 from the passenger compartment of the vehicle into the housing 1 ("recycled air" mode of operation of the air management system), the recycling air intake is deported towards the free end of the duct 7.
[0048] Le conduit 7 constitue un amortisseur d’ondes sonores prévu pour déporter l’entrée d’air de recyclage. Le conduit 7 permet aussi d’augmenter les pertes de charge subies par le flux d’air de recyclage 11 afin de s’approcher de celles subies par le flux d’air extérieur 4 lorsque c’est ledit flux d’air extérieur 4 qui alimente le système de gestion de l’air, de façon à réduire au maximum l’écart de bruit 6 entre les modes « air extérieur » et « air recyclé ». The conduit 7 is a sound wave damper provided to deport the recirculation air intake. The duct 7 also makes it possible to increase the pressure losses experienced by the recirculating air flow 11 in order to approach those experienced by the outside air flow 4 when it is said outside air flow 4 that feeds the air management system, so as to minimize the noise gap 6 between the "outside air" and "recirculated air" modes.
[0049] Sur la figure 5, conforme à l’état de l’art, le système de gestion de l’air comprend notamment un pulseur 5 et est intégré dans un ensemble comportant une planche de bord 9 et une boîte à gants 8. Dans le mode de fonctionnement dans lequel le flux d’air de recyclage 11 alimente le système, le volet de recyclage pivotant 3 est ouvert, la prise d’air de recyclage se trouvant alors sous la planche de bord 9. Les pertes de charges sont réduites par rapport au mode de fonctionnement dans lequel le flux d’air extérieur alimente le système, ce qui entraîne une augmentation des vitesses d’air et donc du bruit 6. De plus, du bruit 6 est également généré par le pulseur 5 et libéré dans la cavité raisonnante délimitée, par le dessus, par la planche de bord 9 et, par le dessous, par la boîte à gants 8, et débouche directement dans l’habitacle du véhicule automobile. Les nuisances sonores sont donc importantes pour les passagers du véhicule. [0050] Dans un tel contexte, en référence aux figures 6A, 6B, 7, il est représenté différentes variantes de réalisation de l’invention. Sur ces figures, la canalisation 2 est délimitée par la boîte à gants 8’ et/ou la planche de bord 9’. In FIG. 5, according to the state of the art, the air management system comprises in particular a blower 5 and is integrated in an assembly comprising a dashboard 9 and a glove box 8. In the operating mode in which the recirculation air flow 11 feeds the system, the pivoting recycling flap 3 is open, the recycling air intake being then under the dashboard 9. The pressure losses are reduced compared to the operating mode in which the outside air flow feeds the system, which causes an increase in air velocities and therefore noise 6. In addition, noise 6 is also generated by the blower 5 and released in the reasoning cavity defined by the above, by the dashboard 9 and from below, by the glove box 8, and opens directly into the passenger compartment of the motor vehicle. Noise pollution is therefore important for the passengers of the vehicle. In such a context, with reference to Figures 6A, 6B, 7, there is shown different embodiments of the invention. In these figures, the pipe 2 is delimited by the glove box 8 'and / or the dashboard 9'.
[0051] Conformément à l’invention, le conduit 7 est configuré pour coiffer le volet de recyclage pivotant 3 en ménageant un passage au flux d’air de recyclage 11 et au flux d’air extérieur 4. According to the invention, the duct 7 is configured to cap the pivoting recycling flap 3 by providing a passage to the recirculating air flow 11 and the outside air flow 4.
[0052] Selon les variantes de réalisation représentées sur les figures 6A, 6B et 7, le conduit 7 est moulé respectivement avec la boîte à gants 8’ ou avec la planche de bord 9’. Selon ces variantes, le conduit 7 surplombe totalement la zone du volet de recyclage pivotant 3 de façon à venir en même temps coiffer le pulseur 5 pour ainsi former un paravent vis-à-vis d’une onde acoustique directe produite par ledit pulseur 5 et une chicane aéraulique vis-à-vis d’un écoulement d’air généré par ledit pulseur 5. Comme représenté sur les figures 6A, 6B, dans le cas où le système comprend la boîte à gants 8’, la configuration du conduit 7 est fonction de la position du volet de recyclage pivotant 3 en partie supérieure ou à l’avant du pulseur 5. According to the embodiments shown in Figures 6A, 6B and 7, the conduit 7 is molded respectively with the glove box 8 'or with the dashboard 9'. According to these variants, the duct 7 completely overhangs the area of the pivoting recycling flap 3 so as at the same time to cap the blower 5 so as to form a screen vis-à-vis a direct acoustic wave produced by said blower 5 and an air flow baffle with respect to an air flow generated by said blower 5. As shown in FIGS. 6A, 6B, in the case where the system comprises the glove box 8 ', the configuration of the duct 7 is depending on the position of the pivoting recycling flap 3 in the upper part or at the front of the blower 5.
[0053] Pour l’ensemble des modes de réalisation, la longueur et/ou la forme du conduit 7 sont de préférence configurées de manière à générer vis-à-vis du flux d’air de recyclage 1 1 des pertes de charge adaptées de telle sorte que, par rapport à un flux d’air issu de l’extérieur et guidé dans la canalisation jusqu’au pulseur 5, on ait les mêmes pertes de charges. For all the embodiments, the length and / or the shape of the duct 7 are preferably configured so as to generate, with respect to the recirculation air stream 1 1, appropriate pressure losses of such that, with respect to an air flow coming from the outside and guided in the pipe to the blower 5, there is the same loss of charges.
[0054] Selon une variante de réalisation, le conduit 7 comprend un ou plusieurs matériaux absorbants acoustique afin de réduire encore davantage les ondes acoustiques qui le traversent ou de contenir le bruit 6 susceptible de traverser l’ouverture du volet de recyclage pivotant 3. A titre d’exemples non limitatifs, les matériaux absorbants ajoutés sont une mousse polymère telle qu’une mousse de polyuréthane, une mousse de terpolymère d’éthylène-propylène-diène, un feutre non tissé ou tout autre matériau présentant des caractéristiques d’absorption des ondes sonores. According to an alternative embodiment, the duct 7 comprises one or more acoustic absorbing materials to further reduce the acoustic waves that pass through or to contain the noise 6 may pass through the opening of the pivoting recycling flap 3. A As non-limiting examples, the absorbent materials added are a polymeric foam such as a polyurethane foam, an ethylene-propylene-diene terpolymer foam, a non-woven felt or any other material having absorption characteristics. sound waves.
[0055] Un tel système de traitement aéraulique et acoustique selon l’invention permet avantageusement de garantir un niveau de bruit homogène entre le mode de fonctionnement dans lequel le flux d’air extérieur 4 alimente le système de gestion de l’air du véhicule et le mode de fonctionnement dans lequel le flux d’air de recyclage 11 alimente le système de gestion de l’air du véhicule. Such an aeraulic and acoustic treatment system according to the invention advantageously makes it possible to guarantee a level of homogeneous noise between the mode of operation in which the outside air flow 4 supplies the vehicle's air management system and the mode of operation in which the recirculation air stream 11 supplies the vehicle's air management system.

Claims

Revendications : Claims:
1. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule, notamment d’un véhicule automobile présentant un habitacle, ledit système de gestion de l’air comprenant une canalisation (2) guidant un flux d’air extérieur (4) venant de l’extérieur du véhicule via une prise d’air extérieur ou un flux d’air de recyclage (11 ) issu de l’habitacle via une ouverture (10) aménagée dans ladite canalisation (2) et débouchant dans l’habitacle, un volet de recyclage pivotant (3) se déplaçant entre une position d’ouverture dans laquelle ledit volet de recyclage pivotant (3) obture la prise d’air extérieur et libère l’ouverture (10), ladite ouverture (10) formant une prise d’air de recyclage issu de l’habitacle, et une position de fermeture dans laquelle ledit volet de recyclage pivotant (3) obture l’ouverture (10) et libère la prise d’air extérieur, ledit système de gestion de l’air comprenant par ailleurs une source de bruit (6) émettant un signal sonore dans la canalisation (2), 1. Air and acoustic treatment system for a vehicle air management system, especially a motor vehicle having a passenger compartment, said air management system comprising a pipe (2) guiding a flow of air outside air (4) coming from the outside of the vehicle via an outside air intake or a recirculating air flow (11) coming from the passenger compartment via an opening (10) arranged in said duct (2) and opening into the passenger compartment, a pivoting recycling flap (3) moving between an open position in which said pivoting recycling flap (3) closes the outside air intake and releases the opening (10), said opening (10) forming a recirculation air intake from the passenger compartment, and a closed position in which said pivoting recycling flap (3) closes the opening (10) and releases the outside air intake, said system of air management including by air rs a noise source (6) emitting a sound signal in the pipe (2),
caractérisé en ce qu’il comprend un conduit (7), ledit conduit (7) présentant une première extrémité fixée à la canalisation (2) d’un côté de l’ouverture (10) et une deuxième extrémité libre, laissant un passage entre ledit conduit (7) et ladite ouverture (10), ledit passage débouchant dans l’habitacle, ledit conduit (7) présentant une longueur adaptée pour surplomber l’ouverture (10), et, au-delà, une portion de la canalisation (2), de façon à créer une prise d’air de recyclage déportée au-delà de l’ouverture (10) lorsque ledit volet de recyclage pivotant (3) est dans la position d’ouverture.  characterized in that it comprises a conduit (7), said conduit (7) having a first end attached to the pipe (2) on one side of the opening (10) and a second free end, leaving a passage between said duct (7) and said opening (10), said passage opening into the passenger compartment, said duct (7) having a length adapted to overhang the opening (10), and, beyond, a portion of the duct ( 2), so as to create a remote recirculation air intake past the opening (10) when said pivoting recycle flap (3) is in the open position.
2. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule selon la revendication 1 , caractérisé en ce que le conduit (7) est rigide. 2. Aeraulic and acoustic treatment system for a vehicle air management system according to claim 1, characterized in that the conduit (7) is rigid.
3. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule selon l’une des revendications précédentes, caractérisée en ce que la longueur du conduit (7) est configurée pour induire dans le flux d’air de recyclage (11 ) des pertes de charge équivalentes aux pertes de charge induites dans le flux d’air extérieur (4) par la canalisation (2) en amont de l’ouverture (10). Air and acoustic treatment system for a vehicle air management system according to one of the preceding claims, characterized in that the length of the duct (7) is configured to induce in the air flow. recycling (11) pressure losses equivalent to the pressure losses induced in the outside air flow (4) through the pipe (2) upstream of the opening (10).
4. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule selon l’une des revendications précédentes, caractérisé en ce que le conduit (7) est issu de matière de la canalisation (2). 4. Aeraulic and acoustic treatment system for a vehicle air management system according to one of the preceding claims, characterized in that the conduit (7) is derived from material of the pipe (2).
5. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule selon l’une des revendications précédentes, caractérisé en ce que le conduit (7) est une pièce rapportée rendu solidaire de la canalisation (2) par l’intermédiaire de moyens de solidarisation, lesdits moyens de solidarisation étant constitués de l’un quelconque au moins des moyens de solidarisation suivants : emboîtement, collage, brochage, pinçage, clipsage. 5. Aeraulic and acoustic treatment system for a vehicle air management system according to one of the preceding claims, characterized in that the duct (7) is an insert made integral with the pipe (2). by means of securing means, said securing means being constituted by at least one of the following fastening means: interlocking, gluing, broaching, clamping, clipping.
6. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule selon l’une des revendications précédentes, caractérisé en ce que le conduit (7) comprend au moins un matériau acoustiquement absorbant. 6. Aeraulic and acoustic treatment system for a vehicle air management system according to one of the preceding claims, characterized in that the conduit (7) comprises at least one acoustically absorbent material.
7. Système de traitement aéraulique et acoustique pour un système de gestion de l’air d’un véhicule selon la revendication précédente, ledit matériau acoustiquement absorbant étant une mousse de polymère ou une combinaison de mousses de polymère parmi les mousses de polymère suivantes : une mousse de polyuréthane, une mousse de terpolymère d’éthylène-propylène-diène, un feutre non tissé. An air and acoustic treatment system for a vehicle air management system according to the preceding claim, said acoustically absorbent material being a polymer foam or a combination of polymer foams among the following polymer foams: a polyurethane foam, an ethylene-propylene-diene terpolymer foam, a non-woven felt.
8. Système de gestion de l’air pour un véhicule, comprenant une canalisation (2) guidant un flux d’air extérieur (4) venant de l’extérieur du véhicule via une prise d’air extérieur, ladite canalisation présentant une ouverture (10) débouchant dans l’habitacle, un volet de recyclage pivotant (3) se déplaçant entre une position d’ouverture dans laquelle ledit volet de recyclage pivotant (3) obture la prise d’air extérieur et libère l’ouverture (10), ladite ouverture (10) formant une prise d’air de recyclage issu de l’habitacle, et une position de fermeture dans laquelle ledit volet de recyclage pivotant (3) obture l’ouverture (10) et libère la prise d’air extérieur, ledit système de gestion de l’air comprenant par ailleurs un pulseur (5), source de bruit, émettant un signal sonore dans la canalisation (2), ledit système de gestion de l’air comprenant par ailleurs un système de traitement aéraulique et acoustique selon l’une des revendications précédentes. An air management system for a vehicle, comprising a duct (2) guiding an outside air flow (4) from outside the vehicle via an outside air intake, said duct having an opening ( 10) opening into the passenger compartment, a pivoting recycling flap (3) moving between an open position in which said pivoting recycling flap (3) closes the outside air intake and releases the opening (10), said opening (10) forming a recirculating air intake from the passenger compartment, and a closed position in which said pivoting recycling flap (3) closes the opening (10) and releases the outside air intake, said air management system further comprising a pulser (5), a source of noise, emitting a sound signal in the pipe (2), said air management system further comprising an air and acoustic treatment system according to one of the claims previous ones.
9. Véhicule (1 ) automobile comprenant un système de gestion de l’air selon la revendication précédente. 9. Vehicle (1) automobile comprising an air management system according to the preceding claim.
EP19704660.0A 2018-02-08 2019-01-18 Aeraulic and acoustic treatment system for an air management system for a vehicle Withdrawn EP3749535A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1851038A FR3077529B1 (en) 2018-02-08 2018-02-08 AERAULIC AND ACOUSTIC TREATMENT SYSTEM FOR A VEHICLE AIR MANAGEMENT SYSTEM
PCT/FR2019/050111 WO2019155135A1 (en) 2018-02-08 2019-01-18 Aeraulic and acoustic treatment system for an air management system for a vehicle

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FR (1) FR3077529B1 (en)
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Publication number Priority date Publication date Assignee Title
JP2000168334A (en) * 1998-12-01 2000-06-20 Sanden Corp Intake unit of air conditioner for vehicle
DE10231803B4 (en) * 2002-07-15 2010-10-07 Volkswagen Ag Air conditioner for a vehicle
FR2920044B1 (en) * 2007-08-16 2015-07-17 Valeo Systemes Thermiques BOX COMPRISING A VENTILATION, HEATING AND / OR AIR CONDITIONING INSTALLATION PROVIDED WITH SOUND WAVE ACOUSTICAL MITIGATION MEANS AND INSTALLATION COMPRISING SUCH A BOX
FR2934815B1 (en) * 2008-08-07 2010-09-03 Valeo Systemes Thermiques AIR INTAKE BOX COMPRISING MEANS FOR ATTENUATING ACOUSTIC NUISANCES
JP5770912B1 (en) 2014-11-18 2015-08-26 株式会社ヴァレオジャパン Air conditioner for vehicles

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MA51736A (en) 2021-05-12
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FR3077529B1 (en) 2020-08-28

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