Dashboard and motor vehicle comprising such a dashboard

Abstract

The dashboard (7) comprises: - a supporting structure (9) having a first large face (15) and a second large face (17) opposite the first large face (15); - a first deformable structure (11), delimiting at least one first duct (19, 21, 23, 25) having an open side (27), the first deformable structure (11) being fixed to the supporting structure (9), the open side (27) of the or each first duct (19, 21, 23, 25) being closed by the first large face (15) of the supporting structure (9); - a second deformable structure (13), delimiting at least one second conduit (31, 33) having an open side (35), the second deformable structure (13) being fixed to the supporting structure (9), the open side (35) of the or each second conduit (31, 33) being closed by the second large face (17) of the supporting structure (9) in which the first deformable structure (11) and / or the second deformable structure (13) are only fixed to the supporting structure (9).Figure for abstract: Fig. 2.

Description

Title of the invention: Dashboard and motor vehicle comprising such a dashboard

[0001] The present invention generally relates to a vehicle dashboard in which air ducts are integrated.

[0002] Such a dashboard may comprise a rigid structure, and air ducts composed of tubes. The tubes are inserted inside the rigid structure.

[0003] Such a dashboard has a relatively complex structure, and is expensive to manufacture.

[0004] In this context, the invention aims to provide a dashboard with a simpler structure, less expensive to manufacture.

[0005] To this end, the invention relates to a dashboard comprising:

[0006] - a supporting structure having a first large face and a second large face opposite the first large face;

[0007] - a first deformable structure, delimiting at least a first conduit having an open side, the first deformable structure being fixed to the supporting structure, the open side of the or each first conduit being closed by the first large face of the supporting structure;

[0008] - a second deformable structure, delimiting at least one second conduit having a open side, the second deformable structure being fixed to the supporting structure, the open side of the or each second conduit being closed by the second large face of the supporting structure in which the first deformable structure and / or the second deformable structure are only fixed to the supporting structure.

[0009] The first and second deformable structures are easy and inexpensive to manufacture, for example by injection molding a plastic material. The first and second conduits are open on one side, so that they can be easily obtained when manufacturing the first and second deformable structures.

[0010] The first and second conduits are closed by the first and second large faces of the supporting structure, which can be achieved in a very practical manner when fixing the first and second deformable structures to the supporting structure.

[0011] It is therefore not necessary to insert a tubular structure inside the supporting structure, which is a fairly long and complex operation.

[0012] Overall, the manufacturing of the dashboard is facilitated, and the cost of this dashboard is reduced.

[0013] The dashboard may also have one or more of the following features, considered individually or in any technically feasible combinations: possible:

[0014] - the first deformable structure and / or the second deformable structure are made of a plastic material with a thickness of less than 2 mm, for example PE or PP;

[0015] - the first deformable structure and / or the second deformable structure are made of expanded plastic;

[0016] - the first deformable structure and / or the second deformable structure are fixed to the supporting structure by welding, for example ultrasonic welding;

[0017] - the dashboard includes a trim cover covering the structure carrier, the first deformable structure and the second deformable structure, and defining a surface visible to the passengers of the vehicle;

[0018] - the at least one first conduit and the at least one second conduit are in common fluid communication with each other and together form an air duct, one of the at least one first duct and at least one second duct defining an upstream section of the air duct, the other of the at least one first duct and at least one second duct defining a downstream section of the air duct;

[0019] - the supporting structure comprises at least two air inlets, one of the air inlets being in fluid communication with the first conduit and another of the air inlets being in fluid communication with the second conduit;

[0020] - the portion of the first deformable structure defining the at least one first conduit and / or the portion of the second deformable structure defining the at least one second conduit have a substantially U-shaped cross-section.

[0021] According to a second aspect, the invention relates to a motor vehicle comprising a passenger compartment, a windshield and a dashboard having the above characteristics housed in the passenger compartment, the at least one first duct belonging to a defrosting circuit and having orifices intended to blow air towards the windshield, the at least one second duct belonging to an air conditioning circuit of the passenger compartment and supplying air to the orifices arranged to blow air into the atmosphere of the passenger compartment.

[0022] The motor vehicle may also have the following characteristic:

[0023] - the air blowing orifices supplied by the at least one second duct plug directly into a volume located at the rear of the dashboard.

[0024] Other characteristics and advantages of the invention will emerge from the detailed description thereof provided below, for information purposes only and in a non-limiting manner, with reference to the appended figures, among which:

[0025] - [Fig.l] [Fig.l] is a schematic longitudinal sectional view of a vehicle integrating a dashboard according to the invention;

[0026] - [Fig.2] [Fig.2] is an exploded perspective view of the dashboard of the [Fig.l] ; and

[0027] - [Fig.3] [Fig.3] is a perspective view of the dashboard of [Fig.2], in the state assembled.

[0028] The vehicle 1 shown in [Fig.l] comprises a passenger compartment 3, a windshield 5 and a dashboard 7 housed in the passenger compartment 3.

[0029] In the example shown, the motor vehicle is a car.

[0030] Alternatively, the motor vehicle is a truck, or a bus, or a utility vehicle, or a train, or any other motor vehicle.

[0031] In the present description, the longitudinal direction corresponds to the normal direction of movement of the motor vehicle. The vertical direction is perpendicular to the rolling plane of the vehicle, and the transverse direction is perpendicular to both the longitudinal direction and the vertical direction.

[0032] By front and rear is meant in relation to the longitudinal direction. Top and bottom, above and below, are understood in relation to the vertical direction. By right and left is meant in relation to the transverse direction.

[0033] The windshield 5 is the window delimiting the passenger compartment 3 towards the front.

[0034] The passenger compartment 3 is the interior space of the vehicle where the passengers are accommodated.

[0035] The dashboard 7 is arranged at the front of the passenger compartment 3, under the windshield 5. It extends transversely from one side to the other of the passenger compartment 3.

[0036] As is clearly visible in [Fig.2], the dashboard 7 comprises a supporting structure 9, a first deformable structure 11 and a second deformable structure 13.

[0037] The supporting structure 9 is a relatively rigid structure, giving its structural rigidity to the dashboard 7. The supporting structure 9 is a thin structure, of complex shape.

[0038] The supporting structure 9 is generally a thin shell, made of plastic material.

[0039] It is obtained by injection or thermoforming of the plastic material.

[0040] The supporting structure 9 has a significant thickness, between 1 and 10 millimeters, preferably between 1 and 5 millimeters, more preferably between 1.5 and 2.5 millimeters.

[0041] The plastic material is for example polypropylene (PP), or polyethylene (PE), or polycarbonate (PC) or even polystyrene (PS).

[0042] The plastic material is advantageously reinforced with fibers, for example with natural fibers (hemp, wood, etc.) or glass.

[0043] According to an exemplary embodiment, the supporting structure 9 is made of glass fiber reinforced polypropylene, obtained by injection, and having a thickness of 2.5 millimeters.

[0044] Alternatively, the supporting structure 9 is made of a mixture of polyethylene and thermoformed polystyrene, and has a thickness of approximately 1.5 millimeters.

[0045] The supporting structure 9 has a first large face 15 and a second large face 17 opposite the first large face 15.

[0046] The first and second large faces 15, 17 are the two opposite faces of the shell constituting the supporting structure.

[0047] The first large face 15 faces upwards. It faces towards the windshield 5.

[0048] The second large face 17 faces downwards. It faces the floor of the passenger compartment 3.

[0049] The first deformable structure 11 is fixed to the supporting structure 9. It is fixed only to the supporting structure 9, in the sense that it has no attachment to an element of the dashboard or of the vehicle other than the supporting structure 9. Thus, all the forces applied to the first deformable structure 11 are taken up by the supporting structure 9.

[0050] The first deformable structure 11 is a deformable shell, made of plastic material.

[0051] The first deformable structure 11 is obtained by thermoforming, by expansion or by injection of the plastic material.

[0052] The first deformable structure 11 is made of a deformable material.

[0053] This means that the first deformable structure 11 is made of a material that deforms without creating a crack or rupture zone in the event of interference with another structure of the dashboard or the vehicle. Such interference generally occurs during the assembly of the various components of the dashboard, or during the mounting of the dashboard on board the vehicle. It may happen that during assembly or mounting, the first deformable structure comes to rest, temporarily or permanently, against another structure, and is therefore deformed. This deformation does not cause irreparable damage to the first deformable structure 11, because the latter is made of a deformable material.

[0054] The first deformable structure 11 is for this purpose made of a plastic material with a thickness of less than 2 millimeters, for example between 0.1 and 1 millimeter, and even more preferably between 0.4 and 0.7 mm. It has for example a thickness of 0.5 millimeters.

[0055] The plastic material is PE, or PP, or a mixture of PE and PP.

[0056] It is advantageously made of a foam of one of these plastic materials. Alternatively, the plastic material is unexpanded, and is solid, for example made by plastic injection.

[0057] The first deformable structure 11 is of complex shape.

[0058] The first deformable structure 11 delimits at least a first conduit 19, 21, 23, 25 having an open side 27 ([Fig.l]). The open side 27 of the or each first conduit 19, 21, 23, 25 is closed by the first large face 15 of the supporting structure 9.

[0059] In the example shown, the first deformable structure 11 delimits several first conduits referenced 19, 21, 23, 25, the functions of which will be described below.

[0060] The or each first conduit 19, 21, 23, 25 has a complex shape, generally not rectilinear.

[0061] The or each first conduit 19, 21, 23, 25 has an elongated shape, and extends along a central line C ([Fig.2]). This central line C extends along a three-dimensional path in the examples shown.

[0062] The open side 27 extends substantially over the entire length of the first conduit 19, 21, 23, 25, the length being taken along the central line C. The open side 27 is located laterally with respect to the central line C. In other words, the or each first conduit 19, 21, 23, 25 is open over a part of its periphery, this periphery being considered around the central line C.

[0063] The open side 27 covers, around the central line C, an angular sector generally between 30° and 180°, preferably between 45° and 135°, more preferably between 60° and 120°.

[0064] This open side 27 is sealed by the first large face 15.

[0065] To do this, the first deformable structure 11 is placed directly against the first large face 15 of the supporting structure 9.

[0066] It is fixed to the supporting structure 9 by welds, for example by ultrasonic welding and / or vibration welding.

[0067] These welds are, for example, mirror welds.

[0068] Mirror welding is a thermal welding technique for joining thermoplastics, using a tool capable of heating from two sides at the same time. The tool is introduced between the two structures to be welded to each other, here the supporting structure 9 and the first deformable structure 11. After the structures are heated, the structures are pressed against each other.

[0069] The first deformable structure 11 is thus fixed to the supporting structure 9, and more precisely to the first large face 15, by two weld lines 29 for each first conduit 19, 21, 23, 25. These weld lines 29 extend along and on either side of the open side 27. The weld lines 29 extend over the entire length of the or each first conduit 19, 21, 23, 25, the length being understood here as being the extent of the first conduit along the central line C. The weld lines 29 join at their ends to form a closed contour, or join only at one of the two ends, or alternatively do not join. Alternatively, the first deformable structure 11 is fixed to the supporting structure 9, by separate weld points and or a portion.

[0070] In [Fig.2], only the weld lines 29 of the first conduit 19 have been re presented.

[0071] The second deformable structure 13 is of the same type as the first deformable structure 11.

[0072] The second deformable structure 13 is a thin shell, made of plastic material.

[0073] The second deformable structure 13 is obtained by injection, by expansion or by thermoforming of the plastic material.

[0074] It has a complex shape.

[0075] The second deformable structure 13 is made of a deformable material.

[0076] For this purpose, the second deformable structure 13 is made of a plastic material with a thickness of less than 2 millimeters, preferably between 0.1 and 1 millimeter, more preferably between 0.4 and 0.7 mm. It has, for example, a thickness of 0.5 millimeters.

[0077] The plastic material is PE, or PP, or a mixture of PE and PP.

[0078] It is advantageously made of a foam of one of these plastic materials. Alternatively, the plastic material is unexpanded, and is completely made for example by plastic injection.

[0079] The second deformable structure 13 is fixed to the supporting structure 9. It is fixed only to the supporting structure 9, in the sense that it does not have any point of attachment to another member of the dashboard or the vehicle. All the forces applied to the second deformable structure 13 are absorbed by the supporting structure 9.

[0080] The second deformable structure 13 delimits at least one second conduit 31, 33 having an open side 35. The open side 35 of the or each first conduit 31, 33 is closed by the first large face 17 of the supporting structure 9.

[0081] In the example shown, the second deformable structure 13 delimits two second conduits 31, 33 whose functions will be described below.

[0082] As described above, the or each second conduit 31, 33 has a complex shape, and has an elongated shape along a central line C'. This central line C' generally has a three-dimensional arrangement.

[0083] The open side 35 extends over the entire length of the or each second conduit 31, 33, this length being taken along the central line C'. It extends laterally with respect to the central line C'. In other words, the or each second conduit 31, 33 is open over a part of its circumference, this circumference being taken around the central line C'.

[0084] As previously, the open side 35 covers, around the central line C', an angular sector between 30° and 180°, preferably between 45° and 135°, and even more preferably between 60° and 120°.

[0085] The second deformable structure 13 is directly fixed to the supporting structure 9, and more precisely to the second large face 17.

[0086] It is generally fixed by welds to the supporting structure 9, for example by ultrasonic or vibration welds.

[0087] As before, these welds are generally mirror welds.

[0088] The open side 35 of the or each second conduit 31, 33 is sealed by the second large face 17.

[0089] For this purpose, the second deformable structure 13 is fixed to the supporting structure 9 by weld lines 39 which extend on either side of the or each open side 35. The weld lines 39 extend over the entire length of the or each second conduit 31, 33, this length being taken along the central line C'. Alternatively, the second deformable structure 113 is fixed to the supporting structure 9, by separate weld points and or a portion.

[0090] The weld lines 39 join at both ends of the or each second conduit 31, 33, thus forming a line with a closed contour. Alternatively, they join at only one end as shown in [Fig.2], or they do not join.

[0091] Thus, the first deformable structure 11 is pressed against the first large face 15, and the second deformable structure 13 is pressed against the second large face 17. The first deformable structure 11 is thus located above the supporting structure 9, and the second deformable structure 13 is placed under the supporting structure 9.

[0092] The motor vehicle 1 comprises an air conditioning device 4L. This air conditioning device 41 comprises an air conditioning unit 43, connected by an upstream conduit 45 to an air inlet 47 opening out of the vehicle.

[0093] The air conditioning unit 43 is designed to control the temperature of the air blown by the conditioning device 41 inside the passenger compartment 3.

[0094] It comprises at least one heater, designed to heat the air sucked in through the air inlet 47. It also generally comprises a cooler, configured to cool the air sucked in through the air inlet 47.

[0095] The at least one first conduit 19, 21, 23, 25 and the at least one second conduit 31, 33 are integrated into the air conditioning device 4L

[0096] At least one first conduit belongs to a defrosting circuit 48, and comprises orifices 49 intended to blow air towards the windshield windows 5 and / or door.

[0097] At least one second conduit belongs to an air conditioning circuit 51 of the com- passenger compartment 3 and supplies air to the orifices 53 arranged to blow air into the atmosphere of the passenger compartment. The orifices 53 may be equipped with a vent intended to control the directionality of the air flow.

[0098] In the example shown, one of the first ducts, namely the first duct 19, is integrated into the defrosting circuit 48. The other first ducts, here the first ducts 21, 23 and 25, are integrated into the air conditioning circuit 51 of the passenger compartment. The second ducts 31, 33 are all integrated into the air conditioning circuit 51 of the passenger compartment.

[0099] The air conditioning circuit 51 of the passenger compartment has the sole function of regulating the air temperature inside the passenger compartment 3, and does not have the function of defrosting the vehicle windows, or any other additional technical function.

[0100] The air blowing orifices 53 supplied by the or each second duct 31, 33 open directly into a volume located at the rear of the dashboard. They open into the volume located between the dashboard 7 and the front seats of the vehicle.

[0101] The air conditioning circuit 51 of the passenger compartment also includes other air blowing orifices which will be described later.

[0102] The air conditioning unit 43 has a first air conditioning outlet 55, fluidically connected to the first conduit 19. This connection is not shown in the figures.

[0103] For this purpose, the supporting structure 9 comprises two air inlets 57 fluidly connected to the first duct 19. The air inlets 57 are orifices cut out in the supporting structure 9. They are fluidly connected to the first air-conditioned air outlet 55. They open directly into the first duct 19.

[0104] The first duct 19 extends transversely over the greater part of the transverse width of the dashboard. It has a slightly arched central line C, running along the windshield 5.

[0105] The air conditioning unit 43 further comprises a second air conditioning outlet 59, fluidically connected to the air conditioning circuit 51 of the passenger compartment. The air outlet 59 may be equipped with a vent intended to control the directivity of the air flow.

[0106] For this purpose, the supporting structure 9 comprises an air inlet 61 communicating fluidly with at least one second conduit 31, 33.

[0107] The air inlet 61 is fluidically connected to the air-conditioned air outlet 59 by a conduit not shown. It consists of an orifice cut into the supporting structure 9.

[0108] The first duct 25 directly supplies air to the air blowing orifices 63 opening into the atmosphere of the passenger compartment. The orifices 63 are placed in the center of the dashboard, while the orifices 53 are placed transversely to the left and right of the dashboard.

[0109] The first conduit 25 fluidly connects the air inlet 61 to the air blowing orifices 63.

[0110] In the example shown, the air inlet 61 does not open directly into the second conduits 31, 33.

[0111] As seen in [Fig.2], the second conduits 31, 33 are arranged transversely to the left and right of the dashboard.

[0112] The supporting structure 9 has passage orifices 65, cut out in this structure. The second conduit 31 connects one of the passage orifices 65 to one of the blowing orifices 53. The other second conduit 33 connects the other passage orifice 65 to the other blowing orifice 53.

[0113] Furthermore, the first conduits 21 and 23 are arranged so as to place the first conduit 25 in fluid communication with the two orifices 65.

[0114] Thus, the first ducts 25 and 21 and the second duct 33 together define an air duct, the first ducts 21 and 25 defining an upstream section of the air duct and the second duct 33 defining a downstream section of the air duct.

[0115] Similarly, the first ducts 25 and 23 and the second duct 31 together define another ventilation duct. The first ducts 25 and 23 define an upstream section of the ventilation duct and the second duct 31 defines a downstream section of the ventilation duct.

[0116] It should be noted that the first deformable structure 11 contains portions other than those used to define the at least one first conduit 19, 21, 23, 25.

[0117] These portions are intended to be attached to the supporting structure 9, or for other technical functions which will not be described here.

[0118] In the same way, the second deformable structure 13 comprises portions in addition to those defining the at least one second conduit 31, 33. These portions are for example intended to fix the second deformable structure 13 to the supporting structure 9.

[0119] As seen in [Fig. 1], the dashboard comprises a trim 67 covering the supporting structure 9, the first deformable structure 11 and the second deformable structure 13. This trim 67 defines a surface 69 visible to the passengers of the vehicle.

[0120] The trim 67 is generally called the dashboard cover. It conceals the functional parts of the dashboard, in particular the supporting structure 9, the first deformable structure 11 and the second deformable structure 13.

[0121] The dashboard and vehicle described above have multiple advantages.

[0122] Because the first deformable structure and / or the second deformable structure are only fixed to the supporting structure, the installation of the dashboard in the vehicle is particularly simple.

[0123] Since the first deformable structure and / or the second deformable structure formable are made of a deformable material, it is possible to tolerate interference between the first deformable structure and / or the second deformable structure and other elements of the dashboard or vehicle. First of all, this makes the dashboard more compact. There is no need to maintain a minimum distance between the first deformable structure and / or the second deformable structure and the structures surrounding them. The risk of generating unwanted noise by vibrations propagating in the dashboard is also reduced.

[0124] When the first deformable structure and / or the second deformable structure are made of a plastic material with a thickness of less than 2 millimeters and / or of a plastic foam, it is possible to easily obtain deformable structures.

[0125] Attaching the first deformable structure and / or the second deformable structure to the supporting structure by welds is particularly practical. The design of the dashboard is particularly suitable for attachment by welding. It is composed of several thin shells, attached to each other by weld lines which are particularly easy to obtain. The risk of generating scrap during welding is reduced.

[0126] The fact that the dashboard comprises a trim covering the supporting structure, the first deformable structure and the second deformable structure and defining the surface visible to the passengers of the vehicle makes it possible to easily improve the appearance of the dashboard.

[0127] When at least one first duct and at least one second duct are in fluid communication with each other, and together form an air duct, at least one first duct defining an upstream section of the air duct and at least one second duct defining a downstream section of the air duct, it is possible to obtain air ducts of complex shapes in the dashboard.

[0128] In addition, the supporting structure may include several air inlets, making it possible to organize the circulation of air in the air ducts according to needs.

[0129] When at least a first duct belongs to a defrosting circuit and has air blowing orifices towards the windshield, and at least a second duct belongs to a passenger compartment air conditioning circuit supplying air to orifices blowing air into the atmosphere of the passenger compartment, it is possible to easily integrate into the dashboard both the defrosting circuit and the passenger compartment air conditioning circuit. These circuits can be made using three deformable structures. These circuits are made in a simple and robust manner.

[0130] The dashboard and the vehicle may have several variations.

[0131] The supporting structure, the first deformable structure and the second deformable structure can have all kinds of shapes, different from the shapes shown in the figures.

[0132] The first deformable structure may delimit a single first conduit or alternatively two first conduits, three first conduits or more than three first conduits as in the example shown.

[0133] Similarly, the second deformable structure may delimit a single second conduit, or two second conduits, or more than two second conduits.

[0134] In the above example, it has been described that the defrosting circuit comprises an air duct defined by a single first duct. Alternatively, the air duct of the defrosting circuit may comprise several first ducts, or one or more first ducts arranged in series with one or more second ducts, or even comprise one or more second ducts.

[0135] Similarly, it has been described above that the air conditioning circuit of the passenger compartment comprises an air duct made of a single first duct, and two other air ducts made of a first duct and a second duct in series one behind the other.

[0136] Alternatively, the air conditioning circuit of the passenger compartment comprises fewer or more than three air ducts. Each air duct is defined solely by a first duct, or solely by a second duct, or even by one or more first ducts arranged in series with one or more second ducts.

[0137] The number of air inlet ports or air passage ports provided in the supporting structure may be different from what is shown in the figures. It depends on the design of the air ducts.

Claims

Claims

1. 1 Dashboard (7), comprising: - a supporting structure (9) having a first large face (15) and a second large face (17) opposite the first large face (15); - a first deformable structure (11), delimiting at least one first duct (19, 21, 23, 25) having an open side (27), the first deformable structure (11) being fixed to the supporting structure (9), the open side (27) of the or each first duct (19, 21, 23, 25) being closed by the first large face (15) of the supporting structure (9);- a second deformable structure (13), delimiting at least one second conduit (31, 33) having an open side (35), the second deformable structure (13) being fixed to the supporting structure (9), the open side (35) of the or each second conduit (31, 33) being closed by the second large face (17) of the supporting structure (9) in which the first deformable structure (11) and / or the second deformable structure (13) are only fixed to the supporting structure (9).;

2. 2 Dashboard according to any one of the preceding claims, wherein the first deformable structure (11) and / or the second deformable structure (13) are made of a plastic material with a thickness of less than 2 mm, for example PE or PP,

3. 3 Dashboard according to any one of the preceding claims, wherein the first deformable structure (11) and / or the second deformable structure (13) are made of an expanded plastic.

4. 4 Dashboard according to any one of the preceding claims, wherein the first deformable structure (11) and / or the second deformable structure (13) are fixed to the supporting structure (9) by welds, for example ultrasonic welds.

5. 5 A dashboard according to any preceding claim, wherein the dashboard (7) comprises a trim cover (67) covering the supporting structure (9), the first deformable structure (11) and the second deformable structure (13), and defining a visible surface (69) for passengers of the vehicle.

6. 6 A dashboard according to any preceding claim, wherein the at least one first duct (21, 23, 25) and the at least one second duct (31, 33) are in fluid communication with each other and together form an air duct, one of the at least one first duct (21, 23, 25) and at least one second duct (31, 33) de- terminating an upstream section of the air duct, the other of the at least one first duct (21, 23, 25) and at least one second duct (31, 33) defining a downstream section of the air duct.

7. 7 Dashboard according to any one of the preceding claims, in which the supporting structure (9) comprises at least two air inlets (57, 59, 61), one of the air inlets (57, 59) being in fluid communication with the first duct (19) and another of the air inlets (61) being in fluid communication with the second duct (31, 33).

8. 8 Dashboard according to any one of the preceding claims, wherein the portion of the first deformable structure defining the at least one first duct (21, 23, 25) and / or the portion of the second deformable structure defining the at least one second duct (31, 33) have a substantially U-shaped cross-section.

9. 9 Motor vehicle (1) comprising a passenger compartment (3), a windshield (5) and a dashboard (7) according to any one of the preceding claims housed in the passenger compartment (3), the at least one first duct (19, 21, 23, 25) belonging to a defrosting circuit (48) and having orifices (49) intended to blow air towards the windshield (5), the at least one second duct (31, 33) belonging to an air conditioning circuit (51) of the passenger compartment (3) and supplying air to orifices (53) arranged to blow air into the atmosphere of the passenger compartment (3).

10. 10 Motor vehicle according to claim 9, where the air blowing orifices (53) supplied by at least one second conduit (31, 33) open directly into a volume located at the rear of the dashboard (7).

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