EP3625070A1

EP3625070A1 - Air distribution device for motor vehicle

Info

Publication number: EP3625070A1
Application number: EP18722692.3A
Authority: EP
Inventors: Pascal Guigou
Original assignee: Valeo Systemes Thermiques SAS
Current assignee: Valeo Systemes Thermiques SAS
Priority date: 2017-05-17
Filing date: 2018-04-19
Publication date: 2020-03-25
Also published as: FR3066440A1; WO2018211190A1; FR3066440B1

Abstract

The invention concerns an air distribution device for a motor vehicle comprising a hollow body (10) defined by walls (210, 212, 220, 222) in which, in at least one of the walls, at least the following are provided: - an inlet opening (6) for a treated airflow originating from a ventilation, heating and/or air conditioning system to enter the hollow body, - an outlet opening (7) for an emitted airflow (70). An additional opening (8) is provided in at least one of the walls defining the hollow body and opens on said flow of the treated airflow (60), such that a flow of passenger compartment air (80) from the passenger compartment of the vehicle is sucked through the additional opening by the flow of the treated airflow into the hollow body.

Description

AIR DISTRIBUTION DEVICE FOR MOTOR VEHICLE

The present invention relates to an air distribution device for a vehicle of the automotive type. More specifically, the invention finds a particular application for the doors of a motor vehicle.

Generally, a motor vehicle is equipped with a ventilation system, heating and / or air conditioning that can heat treat the air and then send it to the passenger compartment of the vehicle. The ventilation system, heating and / or air conditioning is configured to achieve a set thermal comfort responding to a request of a user, and for example a given temperature of the air present in one area or the other of the cabin of the vehicle. For this purpose, the ventilation, heating and / or air-conditioning system draws outside air and / or air from the passenger compartment and then processes it through successive passages in heat exchangers, in particular so that it reaches temperature and / or ventilation speed conditions determined to approach the thermal comfort. The treated air is then projected into the passenger compartment by means of aerators arranged appropriately for the treated air supply of this or that area of the passenger compartment. Depending on whether the aim is a treated air supply of the front seats or rear seats, these aerators can be arranged at the dashboard, the center console or in the lateral uprights of the vehicle.

The ventilation system, heating and / or air conditioning is required to treat a significant amount of air before reaching the thermal comfort. Nowadays, users demand to reach this thermal comfort set more quickly, without altering the air quality of the cabin. Manufacturers and automotive suppliers must then offer ventilation, heating and / or air conditioning systems that meet these requirements without generating too much costs, while remaining with a compact, lightweight and easy to use. implantation.

The object of the present invention is therefore to provide a solution to improve both the distribution of air and the thermal comfort of the passenger compartment, without oversizing the ventilation system, heating and / or air conditioning.

In this context, the invention relates to an air distribution device for a motor vehicle comprising a hollow body defined by walls with at least one of the walls in which are provided at least:

an inlet mouth for admission into the hollow body of a treated air flow coming from a ventilation, heating and / or air conditioning system, and - An outlet mouth for an outlet of an air flow emitted from the hollow body, the hollow body being configured to allow a flow of treated air flow between the inlet mouth and the outlet mouth.

According to the invention, an additional mouth is formed in at least one of the walls defining the hollow body so as to lead to said flow of the treated air flow, so that a cabin air flow of the vehicle The automobile is sucked through the additional mouth by the flow of the treated air stream into the hollow body.

According to the invention, the air distribution device comprises an inlet mouth adapted to receive a flow of air that can come from an air conditioning system or any other air source.

Thus, the flow of the treated air stream in the hollow body generates a depression attracting the flow of air from the passenger compartment to cross the additional mouths or. Thus, the invention allows the air of the passenger compartment to mix with a treated air from the ventilation system, heating and / or air conditioning, which ensures a better mixing of the air of the passenger compartment thus improving the comfort of users, ensuring a renewal of the cabin air and achieving faster thermal comfort. Indeed, by increasing the amount of air stirred, the thermal mixtures between the different air flows are faster.

In addition, such a dispensing device installed in a passenger compartment of a motor vehicle makes it possible to increase the quantity of air blown into the passenger compartment without having to oversize the ventilation, heating and / or air conditioning system.

According to one or more characteristics of the invention, which can be taken alone or in combination, provision may be made for:

- The treated air flow comes directly from the ventilation system, heating, and / or air conditioning.

- The additional mouth has a seal vis-à-vis the treated air flow.

- The additional mouth is arranged upstream of the flow of the treated air flow in a direction of flow followed by the flow of cabin air passing through the additional mouth.

- The additional mouth is inclined relative to the hollow body in such a way that this inclination prohibits the flow of treated air out of the hollow body by the additional mouth.

- The additional mouth includes a porous wall. The presence of the porous wall makes it possible to provide a seal with respect to the flow of treated air located inside the hollow body and thus to prevent its exit by the additional mouth. More specifically, the additional mouth can be covered with the porous wall.

- The hollow body comprises a first portion, said supply of the treated air stream, opening into a second portion of the hollow body, said upwelling, by a narrowing. The shrinkage causes a section reduction accelerating the treated air flow which then generates a vacuum capable of sucking air from the passenger compartment via the additional mouth (s).

- The additional mouth (s) opens (s) in a third portion of the hollow body located upstream of the second portion in a direction of flow of the cabin air flow passing through the additional mouths or.

The shrinkage extends all along the feed portion of the treated air stream, in a direction followed by the treated air flow into the inlet mouth.

- The feed portion of the treated air stream is in the form of a perforated conduit. In other words, the conduit comprises at least one orifice arranged to bring the air flow within the dispensing device.

- The inlet for the treated air flow has a central axis crossing perpendicular to a central axis passing through the outlet mouth.

- The additional mouth has a central axis crossing perpendicular to a central axis passing through the inlet mouth. The name "crossing axis" is understood as following the main direction followed by the flow of air passing through the given mouth.

- The additional mouth has a central axis passing parallel or perpendicular to the central axis passing through the outlet mouth. It is then understood that a first outlet mouth has a central axis crossing perpendicular to the central axis through the additional mouth and a second outlet mouth has a central axis passing parallel to the central axis through the additional mouth.

- The flow of the treated air stream is intended to follow a direction parallel to an axis of advance of said motor vehicle. For this purpose, the hollow body is arranged in such a way that the flow of the treated air stream is intended to follow a direction parallel to the axis of advance of the vehicle.

- The inlet mouth has a central axis passing in a direction parallel to an axis of advance of said motor vehicle, so that the treated air flow has, at its admission into the hollow body, a parallel path to the axis of advancement of said motor vehicle. - The hollow body comprises a perforated duct configured to drive the treated air flow, said perforated duct having an axis parallel or coincident with the central axis passing through the inlet mouth.

- The hollow body comprises a mixing zone in which the treated air flow and the air flow of the passenger compartment are intended to mix in a path perpendicular to both a central axis passing through the additional mouth and to a crossing axis of the mouth of entry. More specifically, this mixing zone is located in the upflow portion of the hollow body.

- The treated air flow and the air flow of the passenger compartment are intended to mix in a path perpendicular to an axis of advance of said motor vehicle.

- The mixing zone opens directly to the outlet mouth. The treated air flow and the air flow of the passenger compartment then form the flow of air emitted leaving the outlet mouth.

- The hollow body comprises a mixing channel extending from the inlet of the treated air stream to the outlet mouth.

- The mixing channel extends obliquely or perpendicular to the central axis through the inlet mouth.

The invention also relates to a motor vehicle door, characterized in that it comprises an air distribution device as defined above and wherein the hollow body is formed by a trim panel and a door body.

According to the invention, the door comprises an inlet mouth adapted to receive a flow of air that can come from an air conditioning system or any other air source.

It may also be provided that:

- The outlet mouth and the additional mouth are formed in the door trim panel and in that the inlet mouth is formed in the door body.

- An outlet mouth is arranged at the foot of a window fitted to the door.

- The outlet mouth disposed at the foot of the glass has a central axis crossing perpendicular to the central axis through the additional mouth.

- An outlet mouth is disposed between the foot of glass and a support arm or between the foot of glass and a half of the trim panel, along a vertical axis. - An outlet mouth is arranged in the armrest.

- The outlet mouth disposed between the foot of the window and the arm rest has a central axis crossing parallel to the central axis through the additional mouth

- The inlet mouth and the additional mouth open, perpendicularly to one another, in a lower part of the door. A lower part of the door is defined as the part of the door closest to the floor of the vehicle than the roof, when the door is mounted on the motor vehicle. Thus, the stirring caused by the air flow sucked in at the bottom makes it possible to avoid excessive temperature differences between the roof of the vehicle and its floor.

- The inlet mouth is formed in a transverse wall before the bodywork.

Other features, details and advantages of the invention will emerge on reading the description given below as an indication in relation to drawings in which:

FIG. 1 is a partial schematic representation in section of a passenger compartment of a motor vehicle and a door of the vehicle comprising an air distribution device according to an example embodiment of the present invention,

FIG. 2 is a schematic representation in perspective of a part of the passenger compartment of the motor vehicle and of the door comprising the air distribution device illustrated in FIG. 1;

- Figure 3 is a schematic perspective view of a portion of the passenger compartment of the motor vehicle and the door comprising an air distribution device according to an alternative embodiment of the present invention.

It should first be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.

In the following description, the relative notions such as "internal", "external", "upper", "lower", "front" or "rear" are defined with respect to a passenger compartment of the motor vehicle and to the vehicle itself. . The notion of "internal" according to this reference means that the considered element is located or is moving towards the cockpit, while the notion of "external" according to this reference means that the element considered is located or is heading towards outside the motor vehicle, away from the passenger compartment. The notion of "superior" according to this reference means that the element considered is located or is moving towards the pavilion of the motor vehicle, while the notion "Lower" according to this mark means that the element in question is located or is moving towards the floor of the motor vehicle. A longitudinal axis L is defined as the axis in which the motor vehicle extends along its length, the longitudinal axis L being parallel to an axis of advance of the motor vehicle while driving. In the description which follows, reference will also be made to an orientation as a function of a vertical axis V defined as being the axis perpendicular to the floor of the vehicle during taxiing and of a transverse axis T defined as being the axis perpendicular to both the longitudinal axis L and the transverse axis T. It is then understood that the concepts "internal" and "external" are heard along the transverse axis T, the notions of "superior" and "lower" are heard along the vertical axis V and the concepts of "front" and "rear" refer to the longitudinal axis L, the "front" of the vehicle being defined as the part of the vehicle in front of the driver in driving condition and "the rear" being the part behind the back of the driver's seat.

FIG. 1 shows a passenger compartment 5 of a motor vehicle in which an air distribution device 1 is integrated with a door 2 whose structure and the walls form a hollow body 10. The air distribution device 1 comprises at least three mouths 6, ', 8 opening into the hollow body 10 formed by the door 2. These mouths 6, 7, 8 are arranged at different points relative to the hollow body 10 and each provide a special role which will be detailed later in the description .

Figure 1 also shows that the door 2 comprises a trim panel 21 on one side and a door body 22 on the other side. The trim panel 21 and the door body 22 form between them the hollow body 10 of the air distribution device 1. The lining 21 extends towards the passenger compartment 5 and has a first face turned towards and located in, the passenger compartment 5 as well as a second face turned towards and located in the hollow body 10. In the following description, and according to the reference previously defined, the first face arranged on the passenger side is called internal face 210 and the second face arranged on the hollow body side is called outer face 212. The door body 22 defines the motor vehicle relative to the outside of the motor vehicle and has a face exposed to the outside of the motor vehicle and a side facing the , and located in the hollow body 10. In the following description, and according to the previously defined reference, the face exposed to the outside is called external face 220 and the face in the hollow body is called internal face 222.

The trim panel 21 and the door casing 22, and more specifically the inner face 210 of the trim panel 21 and the outer face 220 of the door casing 22, are connected by walls extending transversely with respect to these faces. . More particularly, it defines a first transverse wall supporting the hinge allowing the mobility of the door 2 by relative to the vehicle, and a second transverse wall comprising a locking system of the door 2. It is then understood that the first transverse wall is located at the front of the vehicle compared to the second transverse wall which is located further back of the vehicle, according to the previously defined mark.

Figures 1 to 3 distinguish between the mouths 6, 8 'of the air distribution device 1 a first mouth, called inlet mouth 6, a second mouth called outlet mouth 7 and a third mouth called mouth additional 8.

The inlet mouth 6 is configured to allow the passage in the door of a thermally treated air, called treated air flow 60. More specifically, the treated air stream 60 is derived from a ventilation system, from heating and / or air conditioning (not shown) located upstream of the air distribution device 1. In order to meet a user demand on the thermal comfort of the passenger compartment 5, the temperature of the air flow treated 60 may vary, especially between hot, cold and temperate, as well as the speed of the treated air stream 60 by varying the fan speed of the ventilation system, heating and / or air conditioning.

According to the embodiments illustrated in Figures 2 and 3, the inlet mouth 6 is formed in the first transverse wall of the door 2, that is to say the front transverse wall comprising the hinge. When the door is in the closed position, the inlet mouth 6 has a central axis crossing 6l in a direction parallel to the longitudinal axis L of the vehicle, this direction being also the direction mainly followed by the treated air flow 60 passing by the inlet mouth 6 and entering the hollow body 10. In the following description, the central through axis 61 is called traversing axis. It should be noted that during its admission, the treated air stream 60 has a trajectory parallel to the longitudinal axis L of the vehicle.

According to all the examples illustrated, the inlet mouth 6 is disposed in a lower part of the door 2, according to the previously defined reference. In other words, the inlet mouth 6 is located closer to the floor 3 of the motor vehicle than the roof 4 · More precisely, according to the embodiment shown in Figure 1, the inlet mouth 6 is arranged in the lower part of the door 2 being closer to the middle of the door body 22 than the floor 3, as will be detailed below.

In order to convey the treated air flow 60 from the ventilation, heating and / or air-conditioning system to the inlet port 6, the motor vehicle comprises at least one duct 9 connecting the ventilation, heating and / or ventilation system. or air conditioning and the inlet mouth 6. More specifically, the pipe 9 extends along a front foot post of the vehicle to open into an opening on the body supporting the hinge of the door 2. The opening is arranged at the level of the inlet mouth 6 formed on the door 2, so that they are in sealed communication when the door 2 is in the closed position. According to an alternative embodiment, a hose may be provided to connect the opening and the inlet mouth 6 when the door 2 is in the open position.

Of course, without departing from the scope of the invention, the air distribution device 1 may comprise a plurality of inlet mouths 6. In this case, a network of conduits supplying several inlet mouths 6 in treated air flow 60 can be provided. The inlet mouths 6 are distributed, preferably, in the lower part of the door 2 and on the first transverse wall of this door 2.

In the door 2, the inlet mouth 6 forms an end of an air supply portion 11 that includes the hollow body 10. According to the embodiment, the air supply portion 11 comprises a perforated conduit 90. More specifically, the inlet mouth 6 and the perforated conduit 90 are coaxial. The perforated duct 90 is located here in a lower part of the door 2, according to the previously defined reference system. Preferably, the perforated duct 90 is disposed in the lower part of the door 2 being closer to the middle of the door body 22 than the floor 3 ·

The figures also make it possible to distinguish that the second mouth, called the outlet mouth 7, is intended for the passage of an emitted air flow 70 coming from the hollow body 10 to send it into the passenger compartment 5 · It should be noted that the hollow body 10, formed according to this embodiment by the door 2, is configured to allow a flow of the treated air stream 60 between the inlet mouth 6 and the outlet mouth 7 · To channel this flow, the body recess 10 may comprise ducts or baffles forming one or more passages for the flow of the treated air stream 60 between the inlet mouth 6 and the outlet mouth 7, as will be described later.

Figure 2 shows that several outlets 7 opening into the hollow body 10 may be provided. Regarding the arrangement of these outlets 7 with respect to the door 2, a first outlet mouth 7 is disposed at the foot of a window 20 and a second outlet mouth 7 is disposed between the foot of the window 20 and an armrest 19 when it is present, or the middle of the trim panel 21 when the arm rest 19 is absent. Of course, all the outlets 7 or the outlet mouth 7, when the air distribution device 1 comprises a single outlet mouth 7, can be arranged at the foot of the window 20 or between the window foot 20 and an armrest 19. According to an alternative embodiment illustrated in FIG. 3, one of the outlet mouths 7 is disposed in the arm rest 19 in order to deliver an emitted airflow 70 towards the bust of a user of the vehicle. .

In general, each outlet mouth 7 is situated in an upper part of the door 2 according to the previously defined reference. In other words, each outlet mouth 7 is located closer to the roof 4 than the floor 3 of the motor vehicle. Note that the outlet mouths 7 are not coaxial with the inlet mouth 6 and that they are located at a different height of the inlet mouth 6, and the flow of the treated air stream 60 between the inlet mouth 6 and the outlet mouth 7 follows a different direction with respect to the direction followed during the admission of the treated air stream 60 into the hollow body 10.

It should be noted that the first outlet mouth 7 disposed at the foot of the window 20 has a central through axis 71 in a direction parallel to the vertical axis V. It should be noted that the central axis through 71 of the first mouth 7 is perpendicular to the traversing axis 6l of the inlet mouth 6. More specifically, the air flow emitted 70 passing through the first outlet mouth 7 follows a direction parallel to the vertical axis V. In the frame of the exemplary embodiment applied to a door 2 of the vehicle, the air flow emitted 70 is then directed to the window 20, which reduces heat losses by forming an air curtain on the window 20.

The second outlet mouth 7 disposed between the foot of the window 20 and the arm rest 19 or in the arm rest 19 has a central through axis 72 in a direction parallel to the transverse axis T and therefore follows a direction perpendicular to both the central through axis 71 of the first outlet mouth 7 and the through axis 61 of the inlet mouth 6. Thus, the emitted air flow 70 passing through the second outlet mouth 7 follows a direction parallel to the transverse axis T.

According to the invention, and as is illustrated in Figures 1 to 3, a third mouth is provided, said additional mouth 8. This additional mouth 8, opening into the hollow body 10, also opens the treated air flow 60 within the hollow body 10 between the inlet mouth 6 and at least one of the outlet mouths 7 · More specifically, the additional mouth 8 is disposed on the lining panel 21, on its inner face 210, so that an air of the passenger compartment 5 is sucked by the flow of the treated air stream 60 in the hollow body 10. The air of the aspirated cabin then forms a flow of cabin air 80 passing through the mouth additional 8 and which then mixes with the treated air stream 60 in the hollow body 10.

The principle of the suction of a flow by the flow of another flow is called flux induction, the cabin airflow 80 then forming a flow induced by a depression of the treated airflow. in the hollow body 10, which can for example be generated by the point acceleration of the treated air flow 60 during its flow in the hollow body 10. It should be noted that during its admission, the air flow d cockpit 80 has a trajectory parallel to the transverse axis T of the vehicle while the mixture of the treated airflow 60 and the cabin airflow 80 follows a path parallel to the vertical axis V of the vehicle and therefore perpendicular to the trajectory followed by the cabin airflow 80 upon admission into the hollow body 10. The treated airflow 60 and the cabin airflow 80 mixed then form the emitted air flow 70 leaving the outlet or mouths 7 ·

In order to ensure better mixing of the mixture between the treated air stream 60 and the cabin airflow 80, the hollow body 10 can be equipped with a mixing channel arranged to collect these two flows downstream of the additional mouth 8 and guide them to the outlet mouths 7, with, for example, one or more flow disturbers arranged in this mixing channel in order to optimize the mixing of the air flow treated with the flow of 60 cabin air 80 in the hollow body 10.

The additional mouth 8 is configured in terms of size, layout, or physical characteristics such that the treated air stream 60 entering the hollow body 10 can not exit through the additional mouth 8. The flow velocity treated air 60 entering the hollow body 10 can also participate in avoiding its exit through the additional mouth 8.

Without departing from the scope of the invention, several additional mouths 8 can be provided, as will be described with reference to FIG. 3 · It should be noted that the additional mouth (s) 8 are located in a lower part of the door 2 In other words, each additional mouth 8 is located closer to the floor 3 than to the roof 4 of the motor vehicle. More precisely, the additional mouth (s) 8 are situated closer to the lower face of the door 2 than is the air intake portion 11. Thus, according to the reference previously defined, the additional mouth (s) 8 are disposed below the perforated duct 90, and below the inlet mouth 6, along the vertical axis V.

The additional mouth (s) 8 each have a central axis 81 passing through a direction parallel to the transverse axis T. Thus, each additional mouth 8 has a central axis 81 passing through perpendicular to the axis 6l passing through the inlet mouth 6 Next, the outlet mouth 7 considered, that located on the foot of the window 20 or that located between the foot of the window and the arm rest 19, each additional mouth 8 has a central axis through 8l respectively perpendicular or parallel to the central axis passing through the first or second outlet mouth 7

The operation of the exemplary embodiments illustrated in FIGS. 1 to 3 will now be described in more detail.

According to the exemplary embodiment illustrated in FIGS. 1 and 2, the hollow body 10 comprises a first part, also called an air supply part 11, in which the treated air stream 60 circulates from the inlet mouth 6 in a direction parallel to the longitudinal axis L. This air supply portion 11 here corresponds to the perforated duct 90. The air supply portion 11 is here located in the lower part of the door 2 and in this case, located closer to the middle of the door body 22 than the floor 3 of the vehicle. The hollow body 10 comprises a second part, called upwelling 13, in which the treated air stream 60 circulates in a direction parallel to the vertical axis V and towards the outlet mouth (s) 7 · The additional mouth 8, covered according to this embodiment of a porous wall 85, is arranged in such a way that it opens into a third portion 14 of the hollow body 10. The third portion 14 of the hollow body is situated upstream of the air upflow portion 13 of the hollow body 10, in a direction of the flow followed by the cabin airflow 80. It can also be said that the third portion 14 of the hollow body 10 opens into the upwind portion 13 in the vicinity of the inlet of the treated airflow 60 in the upwind portion 13. It should be noted that the upwind portion 13 is located downstream of the air supply portion 11, in the direction of flow of the treated air stream 60 from the inlet mouth 6 to the outlet mouths 7 ·

A narrowing 12 is provided between the air supply portion 11 and the upwelling portion 13. This narrowing 12 makes it possible to increase the speed of the treated air flow 60 in the second upwelling portion. 13 generating in its path a vacuum causing the aspiration of the cabin airflow 80 through the additional mouth 8. It is then understood that the additional mouth 8 is located near the narrowing 12. More specifically, the third part 14 opens into the depression zone located downstream of the constriction 12, according to the air flow treated 60.

The narrowing 12 corresponds, according to this embodiment, to the diameters of the holes formed on the perforated duct 90. The narrowing 12 could also correspond to an opening formed along the air supply portion 11, along the axis longitudinal L. Of course, the narrowing 12 could be punctual by extending only on a portion of the air supply portion 11, the other part being closed.

The perforated duct 90 then forms the air supply portion 11 of the hollow body 10, in which the treated air stream 60 admitted from the inlet mouth 6 circulates in a direction parallel to the longitudinal axis L. pits or holes, more or less large are provided on the conduit 90 to form the constriction 12 generating an acceleration of the treated air stream 60 at the outlet of the perforated conduit 90. In a particular embodiment, the perforated conduit 90 includes punctures or holes only on its upper face, that is to say the face of the duct 90 located closer to the roof 4 than the floor 3 · The upstream portion 13 of the hollow body 10 extends from the perforated duct 90 to to outlets 7 ·

The presence of the porous wall 85 allows the treated air flow 60 admitted into the hollow body 10 not to exit through the additional mouth 8 and to circulate towards the outlet mouth or mouths 7 · In addition, the porous wall 85 has small pores ensuring an acceleration of the cabin airflow 80 as soon as it enters the hollow body 10. Of course, the porous wall 85 could be formed inside the additional mouth 8 or be attached to the outer wall 212 of the trim panel 21.

The porous wall 85, covering the additional mouth 8, is formed by a textile covering covering partially or completely the trim panel 21. Of course, any other example of a porous wall 85 may be admitted to cover the additional mouth 8 in the purpose of participating in the induction of the flow of air from the passenger compartment 80. Of course, several additional mouths 8 could be provided and would, according to this embodiment, all covered by one or more porous walls.

Once the cabin airflow 80 is admitted into the upwind portion 13, it forms, with the treated airflow 60, the emitted airflow 70 coming out of the hollow body through the mouth (s). output 7 directing this air flow emitted 70 to the passenger compartment 5 · According to the illustrated example, two outlets 7 are provided in the upper part of the door 2.

The mixture of the treated air stream 60 and the cabin air flow 80 in the hollow body 10 forms the emitted air flow 70 and the emitted air flow temperature results from the mixing of the treated air flow. 60 and cabin airflow 80 each having a predetermined temperature. Obtaining a target temperature corresponding to a desired thermal comfort is then a function of the temperature obtained from the treated air flow 60 relative to that found of the cabin airflow 80. Furthermore, the invention allows the cabin air flow 80 to mix with the treated air stream 60 from the ventilation system, heating and / or air conditioning, which ensures a better mixing of the air of the passenger compartment thus improving the comfort of users.

According to the embodiment illustrated in the figures, the pipe 9 extends into the hollow body 10 through the perforated duct 90 allowing the treated air flow 60 to be distributed in the hollow body 10 and to be brought up to the rear end of the hollow body 10. The perforated duct 90, driving the treated air flow 60, extends in the hollow body 10 from the inlet mouth 6 to an opposite end of the hollow body 10, according to the longitudinal axis L. In order to supply the rear doors of the motor vehicle with treated air flow 60, other ducts and ducts may be provided in the center pillar of the vehicle, between the doors on the same side of the vehicle, these conduits and conduits that can be arranged either in the extension of the perforated duct 90, or directly connected to the heating, ventilation and / or air conditioning system.

The air distribution device 1, according to the embodiment of Figures 1 and 2, comprises a single additional mouth 8, represented by dashes, covered by the porous wall 85. The treated air flow 60 and the cabin air flow 80 then mix in the upflow portion 13 of the hollow body 10, to form the air flow emitted 70 discharged through the outlets 7 · According to this embodiment, the additional mouth 8 is disposed below the perforated duct 90, along the vertical axis V and can be in the form of a large opening opening in the vicinity of the narrowing 12 of the supply portion of FIG. 11. More specifically, the additional mouth 8 has a length, measured along the longitudinal axis L, greater than 20% of a length of a lower edge of the trim panel 21, also measured along the longitudinal axis. L. Preferably, the length of the additional mouth is between 30% and 70% of the length of the lower edge of the trim panel 21. The height of the additional mouth 8, measured along the vertical axis V, is less than 50% of a height of a vertical front edge of the trim panel 21, also measured along the vertical axis V. Preferably, the height of the additional mouth 8 is between 10% and 30% of the height of the edge vertical front of the ga panel 21. Of course, in case of plurality of additional mouths 8, the sum of the lengths and / or heights of the different mouths 8 may have the same dimensions.

According to a third exemplary embodiment illustrated in FIG. 3, the air distribution device 1 comprises a hollow body 10 comprising channels 91a, 91b and the air supplying portion 11 as previously described, which extends from the inlet mouth 6 to an opposite end of the door 2, along the longitudinal axis L. The channels 91a, 9lb extend from the air supply portion 11 to the outlets 7 · Two outlets 7 are provided and each of the two channels 91a, 9lb is dedicated to a specific outlet mouth 7. It is then understood that the number of channels 91a, 91b is equal to the number of outlets 7 · Thus, a first channel 91a feeds the outlet mouth 7 located at the bottom of the window 20 and a second channel 9lb feeds the outlet mouth 7 located here in the arm rest 19.

According to this embodiment, two additional mouths 8 open on a vacuum zone located between the air supply portion 11 and one of the channels 91a, 9lb. The additional mouths 8 are arranged in such a way that the treated air flow 60 flowing in the air intake portion 11 can not exit through these additional mouths 8.

More specifically, downstream of the inlet mouth 6, the treated air flow 60 flows in the air supply portion 11 of the hollow body 10 and the air upflow portion 13 of the hollow body 10 begins as soon as possible. the outlet of the air supply portion 11 to each of the two channels 91a, 9lb to the outlet mouths 7, in the direction of flow of the treated air stream 60.

In order to generate a vacuum to suck up the cabin air flow 80, the treated air stream 60 is accelerated at the outlet of the air supply portion 11. For this, the constriction 12 formed between the air intake part The air supply 11 and the channels 91a, 91b are sized according to the magnitude of the depression that is desired. To accentuate the depression, the ventilation, heating and / or air conditioning system may be configured to deliver a high pressure treated air stream 60, or Well the duct 9 upstream may have a reduced section, or even a section reduction of a portion of the air supply portion 11 may be provided. The flow of air 80 and the treated air stream 60 then mix in each of the channels 91a, 9lb corresponding to the upwind portion 13, so as to form the air flow emitted 70 by the mouth of the mouth 7 ·

The additional boucbes 8 according to this embodiment may also have an étancbité with respect to the treated air stream 60 being for example provided with a porous wall.

The invention as just described can not be limited to the means and configurations exclusively described for a particular embodiment, and also applies to any combination of these means or configurations, as well as the equivalents and any combination of such means or configurations with the equivalents. Indeed, if the invention has been described and illustrated according to different embodiments in the context of a vee door, it is obvious that other elements forming hollow bodies in the house can be envisaged without this adversely affecting the invention. Similarly, if the invention has been described here according to alternative embodiments implementing separately a type of flow induction technique, it is obvious that the presented techniques can be combined without affecting the invention. .

Claims

An air distribution device (1) for a motor vehicle comprising a hollow body (10) defined by walls (210, 212, 220, 222) with at least one of the walls (210, 212, 220, 222) in which are at least:

- an inlet mouth (6) for admission into the hollow body (ΐθ) of a treated air stream (6θ) from a ventilation, heating and / or air conditioning system, and

an outlet mouth (7) intended for an outlet of an emitted air flow (70) from the hollow body (lo),

the hollow body (lo) being configured to allow a flow of the treated air stream (6o) between the inlet mouth (6) and the outlet mouth (7),

characterized in that an additional mouth (8) formed in at least one of the walls (210, 212, 220, 222) defining the hollow body (lo) opens on said flow of the treated air stream (6o), so as to a cabin air flow (8o) of the motor vehicle is sucked through the additional mouth (8) by the flow of the treated air stream (6o) in the hollow body (lo).

Dispensing device according to claim 1, characterized in that the additional mouth (8) comprises a porous wall (85).

Dispensing device according to claim 1 or 2, characterized in that the hollow body (lo) comprises a first part, said supplying the treated air stream (6o), opening into a second part of the hollow body (lo) , said air lift (13), by a narrowing (12).

Dispensing device according to the preceding claim, characterized in that the or the additional mouths (8) open into a third portion (14) of the hollow body (lo) located upstream of the second portion (13) in a direction of flow cabin airflow (8o) passing through the additional mouth (s).

Dispensing device according to claim 3 or 4, characterized in that the constriction (12) extends along the feed portion (11) of the treated air stream (6o) in a direction followed by the treated air flow (6o) in the inlet mouth (6).

Dispensing device according to claim 3 or 4, characterized in that the feed portion (11) of the treated air stream (6o) is in the form of a perforated duct (90). Dispensing device according to any one of the preceding claims, characterized in that the additional mouth (8) has a central through axis (8l) perpendicular to a central through axis (6l) of the inlet mouth (6).

Dispensing device according to the preceding claim, characterized in that the additional mouth (8) has a central through axis (8l) parallel or perpendicular to the central axis through (71, 72) of the mouthpiece output (7).

Car door (2), characterized in that it comprises an air distribution device as defined in any one of the preceding claims and wherein the hollow body (lo) is formed by a trim panel ( 2l) and a door body (22) together forming the door (2).

Motor vehicle door according to the preceding claim, characterized in that the outlet mouth (7) and the additional mouth (8) are formed in the door trim panel (2l) and in that the inlet mouthpiece (6) ) is formed in the door body (22).