FR2897926A1 - Air distribution device for heating, ventilating and air-conditioning apparatus, has pinions connecting two flaps that are respectively mounted on two pivots, where one pivot is connected to another pivot by hook - Google Patents

Abstract

The device has a case with an air inlet channel and an air outlet channel (100), where the opening and closing of the channels are controlled by two flaps (28, 60) respectively mounted on two pivots that rotate around two axes (X1-X1`, X2-X2`). Pinions (70, 72) connect the flaps, where one pivot is connected to another pivot by a hook (118). The pinions are co-planar and disposed in distinct planes, where the flaps is of butterfly type, drum type or flag type.

Description

Air distribution device with reliable movement transmission.

  The present invention relates to heating, ventilation and / or air conditioning apparatus. More particularly, it aims to improve the drive of the distribution flaps of an air flow.

  The heating, ventilation and / or air conditioning appliances generally comprise flap assemblies intended to distribute a flow of air between various outlets. Such is the case of a dispensing device.

  Similarly, the air intake devices comprise a set of flaps for selecting the air flow entering the heating, ventilation and / or air conditioning system.

  Such arrangements generally include a plurality of air distribution flaps that interact with each other to provide the desired air distribution. They involve flap drive means to provide them with a kinematic own distribution law sought.

  The drive means are, in general, micromotors acting directly or indirectly via a cam on the flap to be controlled. It is also conceivable to use cable controls, type `Bowden ', to act on the position of the flap to control.

  In addition, the complex kinematics require several micromotors to move all the flaps according to the desired distribution law.35 In order to simplify these installations, it has been envisaged to have a centralized kinematic involving a multi-track cam controlling various components according to a predetermined law.

  Nevertheless, all of the solutions envisaged are disposed outside the installation incorporating the distribution flaps of the air flow. This has the consequence that the control forces are generated at the ends of the shutters creating distortions along the axis of the shutters. This causes a malfunction of the distribution system and the positional deviations of the shutters.

  In addition, the shutters are used to seal air ducts in which circulates a flow of air. Due to the forces generated by the control device and the arrangement of the flap supports in the casing forming the air duct, pairs are applied to the distribution flap which tends to flare or twist.

  The distance between two cooperating flaps is therefore not constant. The required sealing in defined positions is not certain and repetitive.

  Finally, the current control devices involve many intermediate parts acting as a transfer of movement between the control member and the distribution flap. This succession of transfer of motion is the source of a series of residual play making the kinematic control law random. These devices are also complex to develop and are the cause of additional costs in the price of an installation. In addition, the space required to house such devices is important.

  The object of the present invention is to overcome the aforementioned drawbacks. For this purpose, the invention proposes an air distribution device comprising a housing having at least one air inlet channel and at least one air outlet channel. The opening and closing of the air intake channel and the air outlet channel is controlled by at least a first flap mounted on a first rotary pivot about an axis (X1-X1 ') and at least a second flap mounted on a second rotatable pivot about an axis (X2-X2 ') parallel to the axis (X1, X1', the first flap (28, 30, 32) and the second flap (60, 62, 64), whose second pivot (80) is connected to the first pivot (36) by a connecting member (118), are connected by means of motion transmission.

  In addition, according to an additional feature, the motion transmission means are integral with the first component and the second component. For this purpose, the motion transmission means are reported and secured to the first component and the second component by means of fasteners or they are formed directly with the first component and the second component. Preferably, the housing consists of two half-housings. The first pivot and the second pivot are rotatably mounted in the housing. Alternatively, the connecting member comprises means for supporting the second pivot. The first flap comprises means for attaching the connecting member mounted on the first pivot. The connecting member is coupled at least to a distribution wall of a flow entering the air inlet channel and / or coupled to at least one distribution wall of an outflow in the outlet duct. 'air.

  According to an exemplary embodiment, the first pivot is coupled with a control member and in that the transmission means transfer the movement to the second pivot.

  According to an alternative embodiment, the second pivot is coupled to a control member and in that the transmission means transfer the movement to the first pivot (36).

  Preferably, the motion transmission means consist of gears.

  According to the present invention, the first and second flaps are selected from butterfly or drum or flag flaps. The first and second components (60, 62, 64) may be of different similar types.

  The air distribution device according to the present distribution may comprise at least two first components carried by the first pivot. Similarly, it may comprise at least two second components carried by the second pivot. In such arrangements, the flaps may be coplanar or arranged in separate planes.

  The present invention also relates to a heating, ventilation and / or air conditioning apparatus for a passenger compartment of a motor vehicle comprising an air distribution device having the characteristics defined above. Thanks to the invention, it is possible to simplify the coupling of shutter series in an air distribution device while ensuring reliability and endurance of operation.

  The arrangement of the flaps in the device according to the present invention makes it possible to keep the distance between the flaps and between the pivots constant. Thus, the ducts are sealed in the closed position of the ducts.

  Finally, the control of the air distribution device is by a command according to a simple law. This eliminates the games present in the kinematics. In addition, it also allows the use of a single control member acting on a single pivot. The transfer of movement is done inside the device. This has the effect of reducing transmission efforts and eliminating the potential deformations due to the command.

  Other advantages and features of the invention will appear on reading the description which follows. This description is purely illustrative and given by way of example and should be read with reference to the accompanying drawings in which: FIG. 1 shows a perspective view of an air distribution device according to the present invention, In FIG. 2, a partial perspective view of an air distribution device according to the present invention in which an element of the housing has been removed, and FIG. 3 an exploded view of the air distribution device according to the present invention. invention.

  Referring first to Figure 1 which shows a perspective view of an air distribution device according to the present invention.

  The air distribution device 1 comprises a housing 2 constituting air ducts between upstream air flows and downstream air flows. The housing 1, according to the present embodiment, consists of two half-housings 2 'and 2 "cooperating with each other in order to define the internal channels of the housing 2.

  The half-housings 2 'and 2 "comprise lateral walls 4 and 6 and intermediate walls 8 and 10. The walls 4 and 8 form an integral part of the half-casing 2' The walls 6 and 10 are constituents of the half-casing 2 '"housing. The walls 4 and 6 are interconnected by edges 14 ', 14 ", 16' and 16" extending perpendicular to the planes containing the walls 4 and 6. The edges 14 'and 16' are elements of the half-casing 2 '. The edges 14 "and 16" are integrated in the half-casing 2 ".

  When the two half-housings 2 'and 2 "are assembled to form the housing 2, the respective edges 14', 14" and 16 ', 16 "come in extension of one another to form a structure with the walls 4 and 6 defining an air outlet mouth.

  The walls 4, 6, 8 and 10 are parallel to each other and are arranged perpendicular to the edges 14 ', 14 ", 16' and 16". Thus defined, the air outlet mouth is divided into three channels 22, 24 and 26 outgoing airflow outlet F3, F4 and F5.

  The housing 2 also comprises, according to the present example, a wall 12 extending parallel to the planes containing the walls 4 and 6. The wall 12 is an additional piece mounted on the housing 2. It divides the air upstream of the housing 2 in two incoming air flows F1 and F2 entering the housing 2. Depending on the positioning of the wall 12, the incoming air flows F1 and F2 can enter the housing 2 in different amounts.

  According to the present embodiment, the wall 12 is located in a median plane to the distribution device 1 parallel to the planes containing the walls 4 and 6. The median plane containing the wall 12 therefore constitutes a plane of symmetry for the air distribution device according to the embodiment of Figure 1.

  The arrangement of the housing 2 is such that it makes it possible to distribute in three outgoing downstream air flows F3, F4 and F5 leaving the housing 2, two incoming air flows F1 and F2 entering the housing 2.

  According to alternative embodiments, the number of upstream air flows and downstream air flow is likely to vary depending, in particular, configurations to which will be adapted the air distribution device according to the present invention. More particularly, a distribution device comprising a single upstream air flow and a single downstream air flow is covered by the present invention.

  To enable distribution according to defined commands, flaps 28, 30 and 32 are arranged in the channels 22, 24 and 26. These flaps serve to control the opening and closing of each channel 22, 24 and 26. For this purpose , the flaps 28, 30 and 32 are provided with elements ensuring perfect airtightness with the housing 2 in the closed position in which the flap comes into contact with the periphery of the air channel. These sealing elements are, for example, plastic or rubber lips.

  The flaps 28, 30 and 32 are rotatably mounted about an axis X1-X1 'perpendicular to the walls 4 and 6.

  The flap 28 is constituted by two wings 28 'and 28 "extending on either side of a shaft 28"'. The shaft 28 "'is traversed by the axis X1-X1' The wings 28 'and 28" have widths which are equal to the width of the channel 22 defined by the walls 4 and 8 with the edges 14' and 16 " .

  Similarly, the flap 30 is constituted by two wings 30 'and 30 "extending on either side of a shaft 30' '. The shaft 30 "is traversed by the axis X1-X1 'The wings 30' and 30" have widths which are equal to the width of the channel 24 defined by the walls 8 and 10 with the edges 14 ', 14 ", 16 'and 16".

  Finally, the flap 32 is constituted by two wings 32 'and 32 "extending on either side of a shaft 32"'. The shaft 32 "'is traversed by the axis X-X' The wings 32 'and 32" have widths which are equal to the width of the channel 26 defined by the walls 10 and 6 with the edges 14 "and 16" ".

  The flaps 28, 30 and 32 as described above are of the 'butterfly' type. However, it is also conceivable to employ flap or drum type flaps to control the opening and closing of the channels 22, 24 and 26 without departing from the scope of the present invention. The various components may be of similar or different types.

  The flaps 28, 30 and 32 are independent of each other. Indeed, taken separately, they are independent of each other and are not connected. According to the embodiment shown in Figure 1, the flaps 28, 30 and 32 are mounted on a common pivot 36. The common pivot 36 extends along the axis X1-X1 'and passes through the shafts 28 "', 30 "and 32" 'of the flaps 28, 30 and 32. The pivot 36 thus serves as a rotational drive to the flaps 28, 30 and 32. To do this, means for driving the flaps on the pivot 36 are provided so that the movements of the flaps are integral with the movement of the pivot 36. These drive means are, for example, fastening means or complementary shapes between the inside of the shafts 28 "', 30'" and 32 "'and the pivot 36 acting as a locking device in rotation.

  One end of the pivot 36 comprises a head 38 engaging with a control member (not shown) such as a micromotor or a `Bowden 'type cable. The rotational drive of the pivot 36 by the control member rotates the flaps 28, 30 and 32 between closing and opening positions.

  The pivot 36 is mounted in the housing 2. It is supported on bearings 40, 42, 44 and 46 disposed respectively in the walls 4, 8, 10 and 6. These bearings serve as support and materialize the axis of rotation X1- X1 'of the pivot 36 and flaps 28, 30 and 32.

  According to an alternative embodiment, the flaps 28, 30 and 32 may constitute a unitary element. Thus, the three flaps are interconnected and form a single distribution member having three sets of wings arranged on either side of a single tree. In such a configuration, the pivot connects the shafts 28 "', 30"' and 32 "'of the flaps 28, 30 and 32 and serves as a connecting shaft providing a means of motion transmission between the control member and shutters.

  In addition, according to the needs and the control laws imposed on the flaps, the angular arrangements of each flap with respect to a plane containing the axis X1-X1 'and perpendicular to the walls 4 and 6 are adaptable at will. It is thus possible to have arrangements for which the wings of each flap are coplanar. It is also conceivable to obtain air distribution devices in which the wings of the flaps form angles relative to each other.

  Referring now to Figure 2 which shows a perspective view of an air distribution device according to the present invention wherein the half-housing 2 "has been removed.

  The air distribution device of Figure 2 contains many elements identical to those described in relation to Figure 1. As a result, they will be identified by an identical reference.

  The housing 2 comprises the upstream channels 18 and 20 and the downstream channels 22, 24 and 26. Rear channels 100, 102 and 104 are arranged to supply additional areas of air.

  The rear channels are embodied by an air separator comprising adjoining walls 52, 54 and 56 disposed inside the half-housings 2 'and 2 ". According to the exemplary embodiment, the walls 52 and 54 are parallel to the walls 4 and 6 of the half-housings 2 'and 2 ". The wall 56 is disposed in a plane substantially perpendicular to the walls 52 and 54.

  In general, the upstream channels 18 and 20 constitute air inlet channels and the downstream channels 22, 24 and 26 and the rear channels 100, 102 and 104 constitute air outlet channels. air comprising the walls 52, 54 and 56 forms with the wall 12 a unitary piece inserted into the housing 2. Alternatively, the walls 52, 54 and 56 may be independent and mounted separately in the housing 2.

  In a similar way and according to other variants, the walls 52, 54 and 56 define an air separator independent of the wall 12.

  The channel 100 (not visible in Figure 2) is constituted by walls 50 'and 106' arranged in the half-housing 2 '. The wall 50 'extends from the edge 16' of the half-casing 2 towards the outside of the casing 2. The wall 106 'is disposed inside the half-casing 2 and extends substantially parallel to the wall 50 '. Laterally, the channel 100 is delimited by the walls 4 and 52.

  The channel 104 is constituted by walls 50 ', 50 ", 106' and 106" arranged in the half-casing 2 '. The wall 50 "extends from the edge 16" of the half-casing 2 towards the outside of the casing 2. The wall 106 "is disposed inside the half-casing 2 and extends substantially parallel to the wall 50 ". Laterally, the channel 104 is delimited by the walls 6 and 54.

  The channel 102 is constituted by walls 50 ', 50 ", 106' and 106" arranged in the half-casing 2 'and the walls 52, 54 and 56 of the air separator. Laterally, the channel 104 is delimited by the walls 6 and 54.

  The channels 100, 102 and 104 respectively provide the distribution of three outgoing air flows F6, F7 and F8.

  The distribution of the outgoing air flows F6, F7 and F8 to the channels 100, 102 and 104 is provided by flaps 60, 62 and 64 are arranged in the channels 100, 102 and 104. These flaps can control the opening and closing each channel 100, 102 and 104. For this purpose, the flaps 60, 62 and 64 are provided with elements ensuring the perfect airtightness with the housing 2 in the closed position in which the flap comes into position. contact with the periphery of the air channel. These sealing elements are, for example, plastic or rubber lips.

  The flaps 60, 62 and 64 are rotatably mounted about an axis X2-X2 'perpendicular to the walls 4 and 6. According to the arrangement shown in FIG. 2, the axes X1-X1' and X2-X2 'are parallel between them.

  The flaps 60, 62 and 64 are similar to the flaps 28, 30 and 32. Thus, the flap 60 is constituted by two wings extending on either side of a shaft traversed by the axis X2-X2 '. The wings of the flap 60 have widths that are equal to the width of the channel 100 defined by the walls 4, 52, 50 'and 106'.

  The flap 62 is also constituted by two wings extending on either side of a shaft traversed by the axis X2-X2 '. The wings of the flap 62 have widths that are equal to the width of the channel 102 defined by the walls 52, 54, 50 ', 50 ", 106' and 106".

  Finally, the flap 64 is constituted by two wings extending on either side of a shaft traversed by the axis X2-X2 '. The wings of the flap 64 have widths that are equal to the width of the channel 104 defined by the walls 6, 54, 50 "and 106".

  The flaps 60, 62 and 64 as described above are of the 'butterfly' type. However, it is also conceivable to employ flag or drum type flaps to control the opening and closing of channels 100, 102 and 104 without departing from the scope of the present invention.

  The various components may be of similar or different types.

  The flaps 60, 62 and 64 have the same characteristics as the flaps 28, 30 and 32 as independence from each other. Thus, the flaps 60, 62 and 64 are mounted on a common pivot 80. The common pivot 80 extends along the axis X2-X2 'and passes through the shafts of the flaps 60, 62 and 64. The pivot 80 thus serves as drive in rotation to the flaps 60, 62 and 64. To do this, drive means flaps 60, 62 and 64 on the pivot 80 are provided so that the movements of the flaps are integral with the movement of the pivot 80. These means for example, fastening means or complementary forms between the inside of the shafts of the flaps 60, 62 and 64 and the pivot 80 acting as locking device in rotation.

  One end of the pivot 80 comprises a head 82 engaging with a control member (not shown) such as a micromotor or a `Bowden 'type cable. The rotational drive of the pivot 80 by the control member rotates the flaps 60, 62 and 64 between closing and opening positions.

  The pivot 80 is mounted in the housing 2. It is supported on bearings 84, 86, 88 and 90 disposed respectively in the walls 4, 52, 54 and 6. These bearings serve as a support and materialize the axis of rotation X2- X2 'of the pivot 80 and flaps 60, 62 and 64.

  According to an alternative embodiment, the flaps 60, 62 and 64 may constitute a unitary element. Thus, the three flaps are interconnected and form a single distribution member having three sets of wings arranged on either side of a single tree. In such a configuration, the pivot connects the shafts of the flaps 60, 62 and 64 and serves as a connecting shaft providing a means for transmitting movement between the control member and the flaps.

  In addition, according to the needs and the control laws imposed on the flaps, the angular arrangements of each flap with respect to a plane containing the axis X2-X2 'and perpendicular to the walls 4 and 6 are adaptable at will. It is thus possible to have arrangements for which the wings of each flap are coplanar. It is also conceivable to obtain air distribution devices in which the wings of the flaps form angles relative to each other.

  The two sets of flaps, respectively 28, 30 and 32 on the one hand and 60, 62 and 64 on the other hand, are kinematically related. Thus, rotating one of the series of flaps causes the rotation of the other series of flaps. Such an arrangement makes it possible to use a single control member acting either on the pivot 36 or on the pivot 80.

  The transmission between the flaps 28, 30 and 32, on the one hand, and the flaps 60, 62 and 64, on the other hand, is done by means of pinions 70 and 72. The pinions 70 and 72 are respectively mounted on the pivot 36 and the pivot 80. They are fixed relative to their support pivot. Thus, the control member acting on the pivot 36 or 80 transmits the angular movement integrally to the pinions 70 and 72. The pinions 70 and 72 constitute means for transmitting motion between the flaps.

  Preferably, the pinions 70 and 72 are arranged in the median plane of the distribution device 1. Thus, the transmission forces of one series of flaps on the other series of flaps do not create deformation of the pivots or the pins. internal twists flap series that are sources of games, malfunctions and dispersions in the transmission of control laws.

  The mounting of the motion transmission means on the shutter shafts ensures a suitable and sought-after movement of the various shutters according to a defined control mode. It is therefore permissible to have a reliable and durable distribution when using the air distribution device according to the present invention.

  In addition, depending on the configurations and dimensions, it is possible to alternately drive the pivot 36 or pivot 80. The transmission ratio between the two sets of flaps is defined by the diameters of the pinions 70 and 72 and / or the number of teeth present on each pinion 70 and 72.

  Sprockets 70 and 72 are preferably part of a flap. More particularly, they are integral shutters 30 and 62. They are derived from a method of obtaining by molding. They are then directly trained with the shutters. However, it is also conceivable that the pinions 70 and 72 are attached elements and secured to the flaps and 62 by fixing means such as by gluing, screwing or the like.

  According to the preferred embodiment, the gears are arranged in the median plane. It is possible, however, that the gables are deported and secured with other components.

  Transmission by sprockets is a preferred embodiment. It is also conceivable to ensure the transfer of motion by any other mechanical transmission means such as a belt, a cam track cooperating with an index. FIG. 3 shows an exploded view of the air distribution device according to the present invention. All the elements described above in relation to FIGS. 1 and 2 are repeated and will be identified by an identical reference.

  According to the present invention, the pinion 70 has an extension 110 having an edge 112. The extension 110 serves as a stop when the flaps are in an extreme position. Generally, these extreme positions correspond, on the one hand, to a complete opening of the channel controlled by the shutter for which the flow of air passes completely through the channel and, on the other hand, to a tight closure of the channel controlled by the shutter for which no flow of air passes through the channel.

  Alternatively or in addition, the extension 110 serves to close a passage made in the wall 12 for mounting the flap 30 through the wall 30.

  The shutter 30 comprises, in addition to the pinion 70, a clipping notch located between the pinion 70 and the guide rib 121. The notch 120 cooperates with a catch 118 carried by the air separator formed by the walls 52, 54 and 56. The hook 118 embodies a point of the axis X1-X1 '.

  The notch 120 constitutes fastening means of the catch 118 on the flap 30.

  In operating position, the series of flaps 28, 30 and 32 is mounted on the pivot 36 axis Xl-Xl '. The bearings 40, 42, 44 and 46 are respectively mounted in the walls 4, 8, 10 and 6. A first subassembly comprising the two half-housings 2 and 2 'and the series of flaps 28, 30 and 32 consists of in solidarity.

  The series of flaps 60, 62 and 64 is assembled on the pivot 80 passing through the axis X2-X2 '. The bearings 86 and 88 of the flaps 60, 62 and 64 are mounted in the walls 52 and 54 via bores 114 and 116. The bores 114 and 116 are means for supporting the pivot 80. A second subassembly comprising the air separator formed walls 52, 54 and 56, the catch 118 and the wall 12 is assembled integrally.

  The final assembly is done by the combination of the two subassemblies. To do this, the catch 118 is mounted in the notch 120 of the flap 30. The bearings 84 and 90 cooperate respectively with the walls 4 and 6.

  Thus associated, the pivots 36 and 80 are arranged held parallel to each other. The catch 118 creates an additional support in the central portion of the pivot 36 and the bores 114 and 116 also maintain the pivot 80. The catch 118 being integral with the air separator formed walls 52, 54 and 56, the distance separating the axis X1-X1 'and X2-X2' is defined by the distance separating the catch 118 and the bores 114 and 116 respectively. The configuration of FIG. 3 is such that the catch 118, the bores 114 and 116 form an isosceles triangle whose hook 118 is the main vertex.

  The hook 118 thus constitutes a connecting member between the pivots 36 and 80 and therefore between the flaps 28, 30 and 32, on the one hand, and the flaps 60, 62 and 64, on the other hand. The connection created between the pivots 36 and 80 via the catcher 118 is, in the example described, made by clipping the catcher 118 into the notch 120 of the flap 30. However, it is possible to produce the same connection by any connecting means ensuring the rotation of the pivot 30. According to the embodiment described, the notch 120 is formed in the flap 30. For reasons specific to the internal arrangement of the distribution device, the notch clipping can be performed on another component while ensuring the same function of connection between the shutters.

  This arrangement therefore makes it possible to propose a firm assembly and the perfect transmission of the movement coming from a control member. Indeed, the additional supports constituted by the bores 114 and 116 coupled to the hook 118 provide supports reducing the deformations of the flaps. In addition, the direct connection of the shutter series simplifies the mounting of the air distribution device. Such an assembly also allows transmission in the absence of residual games. The kinematic control laws between the shutters are perfectly ensured and made reliable throughout the rotation of the shutters.

  The present invention finds particular application in heating, ventilation and / or air conditioning systems of motor vehicles as described above. Nevertheless, the device according to the present invention can be applied to any type of installation involving flaps in order to channel and distribute air flows between input channels and output channels.

Of course, the invention is not limited to the embodiments described above and provided solely by way of example and encompasses other embodiments that may be considered by those skilled in the art within the scope of the claims.

Claims (22)

claims   An air distribution device (1) comprising a housing (2) having at least one air inlet channel (18, 20) and at least one air outlet channel (22, 24, 26, 100, 102, 104), the opening and closing of the air inlet channel and the air outlet channel being controlled by at least a first flap (28, 30, 32) mounted on a first pivot ( 36) rotatable about an axis (X1-X1 ') and at least one second flap (60, 62, 64) mounted on a second pivot (80) rotatable about an axis (X2-X2') parallel to the axis (X1, X1 ') characterized in that movement transmission means (70, 72) connect the first flap (28, 30, 32) and the second flap (60, 62, 64), the second pivot ( 80) is connected to the first pivot (36) by a connecting member (118).   2. Air distribution device according to claim 1, characterized in that the motion transmission means (70, 72) are integral with the first component (28, 30, 32) and the second component (60, 62, 64). ).   3. Air distribution device according to claim 1 or 2, characterized in that the motion transmission means (70, 72) are attached and secured to the first flap (28, 30, 32) and the second flap ( 60, 62, 64) by fixing means.   4. Air distribution device according to one of the preceding claims, characterized in that the 19 motion transmission means (70, 72) are formed directly with the first component (28, 30, 32) and the second component (60, 62, 64).   5. Air distribution device according to one of claims 1 to 4, wherein the housing (2) consists of two half-housings (2 ', 2 ").   6. Air distribution device according to one of the preceding claims, wherein the first pivot (36) and the second pivot (80) are rotatably mounted in the housing (2).   7. Air distribution device according to one of claims 1 to 6, wherein the connecting member (118) comprises support means (114, 116) of the second pivot (80).   8. Air distribution device according to one of the preceding claims, wherein the first flap (28, 30, 32) comprises fastening means (120) of the connecting member (118) mounted on the first pivot (36).   9. Air distribution device according to one of the preceding claims, wherein the connecting member (118) is coupled at least to a distribution wall (12) of a flow entering the inlet channel of air (18, 20).   10. Air distribution device according to one of the preceding claims, wherein the connecting member (118) is coupled at least to a distribution wall (52, 54, 56) of an outgoing flow in the channel air outlet (60, 62, 64, 100, 102, 104).   11. Air distribution device according to one of the preceding claims, wherein the first pivot (36) is coupled with a control member and in that the transmission means (70, 72) transfer the movement to the second pivot (80).   Air distribution device according to one of claims 1 to 10, wherein the second pivot (80) is coupled with a control member and in that the transmission means (70, 72) transfer the movement to first pivot (36).   13. Air distribution device according to one of the preceding claims, wherein the motion transmission means (70, 72) are constituted by sprockets.   14. Air distribution device according to one of the preceding claims characterized in that the first flap (28, 30, 32) and the second flap (60, 62, 64) are selected from the butterfly type flaps or 'drum' or 'flag'.   15. Air distribution device according to claim 11, characterized in that the first flap (28, 30, 32) and the second flap (60, 62, 64) are of different types.   16. Air distribution device according to one of the preceding claims, characterized in that the first pivot (36) carries at least two first flaps (28, 30, 32).   17. Air distribution device according to claim 16, characterized in that the first two flaps (28, 30, 32) are coplanar. 10   18. Air distribution device according to claim 16, characterized in that the first two flaps (28, 30, 32) are arranged in separate planes.   19. Air distribution device according to one of the preceding claims, characterized in that the second pivot (80) carries at least two second flaps (60, 62, 64).   20. Air distribution device according to claim 16, characterized in that the two second flaps (60, 62, 64) are coplanar.   21. Air distribution device according to claim 16, characterized in that the second flaps (60, 62, 64) are arranged in separate planes.   22. Heating, ventilation and / or air conditioning apparatus for a passenger compartment of a motor vehicle comprising an air distribution device according to one of the preceding claims.