FR3100312A1 - Heating, ventilation and / or air conditioning device for a motor vehicle - Google Patents

Abstract

The invention relates to a device (1) for heating, ventilation and / or air conditioning for a motor vehicle, comprising a housing (2) defining a flow channel (3) for an air flow with - at least a first duct ( 52) for the flow of a first air flow (F1), defining a first air outlet, - at least a second duct (54) for the flow of a second air flow (F2) , defining a second air outlet, - at least one mixing chamber (18) communicating with the respective air outlets of said ducts (52, 54), and - at least one mixing flap (30) comprising a sliding door (30) arranged so as to control the distribution of the first (F1) and second (F2) air flow in said at least one mixing chamber (18), said at least one mixing flap (30) being arranged movably between a first extreme position closing off the first duct (52), and a second extreme position closing off the second duct (54). - at least one air outlet (12,16,18) arranged downstream with respect to the flow of the air flow from the mixing chamber (18). According to the invention the device further comprises a first distribution flap (22) comprising a second sliding door (22) arranged so as to be able to at least partially close one of said air outlet openings (12,14,16), said second sliding door (22) being movable along a curved path. Figure for the abstract: Fig. 2

Description

Heating, ventilation and/or air conditioning device for a motor vehicle

The invention relates to the field of heating, ventilation and/or air conditioning devices for motor vehicles as well as a motor vehicle comprising such a device.

A motor vehicle is commonly equipped with a ventilation, heating and/or air conditioning device to regulate the aerothermal parameters of a flow of air distributed towards the interior of the passenger compartment of the vehicle. The device generally comprises a casing delimited by partitions in which openings are made, including at least one air inlet and at least one air outlet.

In known manner, the housing houses a blower to circulate the air flow from the air inlet to the air outlet. The casing also houses heat treatment means for heating and/or cooling the flow of air prior to its distribution inside the passenger compartment. By way of example, the heat treatment means may comprise an evaporator which is intended to cool and dehumidify the flow of air passing through it, as well as a radiator, possibly associated with an additional radiator, which is intended to heat the flow of air passing through it.

It is known, in these devices, to have an evaporator arranged downstream of the air inlet, so that the entire flow of air entering inside the case is dehumidified by the evaporator. Then, the flow of cold air thus generated is admitted into a main mixing chamber and/or directed towards a heating device, in particular a radiator and possibly an additional radiator, to obtain a flow of hot air. The main mixing chamber is used to mix one or more cold and/or hot air flows so that the air flow resulting from the mixture, having the desired setpoint temperature, is distributed to specific areas of the passenger compartment of the motor vehicle. The main mixing chamber is provided with at least one mixing device in order to define the proportion of the flow of cold air and the flow of hot air coming from the heating chamber entering the main mixing chamber. This device thus makes it possible to adjust the temperature of the mixed air flow intended to be distributed in the dedicated zone(s) of the passenger compartment, such as for example the front and rear zones, or left and right in the passenger compartment of the motor vehicle.

Although such a heating, ventilation and/or air conditioning device makes it possible to achieve ventilation management for several areas of the vehicle, there are however numerous constraints in terms of volume and weight for these devices. Indeed, the heating, ventilation and/or air conditioning devices are generally arranged under the dashboard of the motor vehicle, this involves raising the dashboards, thus limiting the driver's visibility.

The present invention aims to optimize the vertical steric bulk of a heating, ventilation and/or air conditioning device.

1. au moins un premier conduit pour l’écoulement d’un premier flux d’air, définissant une première sortie d’air,
2. au moins un deuxième conduit pour l’écoulement d’un deuxième flux d’air, définissant une deuxième sortie d’air,
3. au moins une chambre de mixage communiquant avec les sorties d’air respectives desdits conduits,
4. au moins un volet de mixage comprenant une première porte coulissante agencé de façon à contrôler la répartition des premier et deuxième flux d’air dans ladite au moins une chambre de mixage, ledit au moins un volet de mixage étant agencé mobile entre une première position extrême obturant le premier conduit, et, une deuxième position extrême obturant le deuxième conduit, et
5. au moins une bouche de sortie d’air agencé en aval par rapport à l’écoulement du flux d’air de la chambre de mixage.

For this, the invention proposes a heating, ventilation and/or air conditioning device for a motor vehicle, comprising a box defining a flow channel for an air flow with

1. at least a first duct for the flow of a first air flow, defining a first air outlet,
2. at least one second duct for the flow of a second air flow, defining a second air outlet,
3. at least one mixing chamber communicating with the respective air outlets of said ducts,
4. at least one mixing flap comprising a first sliding door arranged so as to control the distribution of the first and second air flows in said at least one mixing chamber, said at least one mixing flap being arranged to move between a first extreme position closing the first duct, and, a second extreme position closing the second duct, and
5. at least one air outlet mouth arranged downstream with respect to the flow of the air flow from the mixing chamber.

According to the invention, the device further comprises a first distribution flap comprising a second sliding door arranged so as to be able to close off at least partially one of said air outlet openings, said second sliding door being movable along a curved trajectory.

In this way, the invention makes it possible to have a heating, ventilation and/or air conditioning device that is less bulky than those of the prior art. Indeed, the fact of arranging two shutters comprising sliding doors at different locations of the heating, ventilation and/or air conditioning device and in particular of having a shutter with a curved trajectory makes it possible to limit in an optimal manner the height of said device. .

By "movable in a curved path" it is meant that the sliding door is movable in a direction that is not planar. The sliding door slides in rails which are inscribed in a plurality of planes. It can also be said that the trajectory of the first distribution flap is curved, the trajectory corresponding to the curve described by the moving flap.

1. la deuxième porte coulissante est agencée de manière à pouvoir obturer la première bouche de sortie d’air configuré pour guider le flux d’air vers une buse de ventilation ;
2. un deuxième volet de distribution comprenant un volet de type drapeau est agencé de manière à pouvoir obturer au moins partiellement une deuxième desdites bouches de sortie d’air ;
3. la deuxième bouche de sortie d’air est configuré pour guider un flux d’air vers la buse de dégivrage ;
4. un troisième volet de distribution comprenant un volet de type papillon est agencé de manière à pouvoir obturer au moins partiellement une troisième desdites bouche de sortie d’air ;
5. la troisième bouche de sortie d’air est configuré pour guider un flux d’air vers la buse des pieds ;
6. la première porte coulissante est également mobile selon une trajectoire courbée ;
7. la première porte coulissante comprend un renfoncement de manière à relier fluidiquement le premier conduit d’air et le deuxième conduit d’air, lorsque ledit au moins un volet de mixage est agencé dans une position intermédiaire entre les première et deuxième positions extrêmes ;
8. un premier échangeur de chaleur, un deuxième échangeur de chaleur sont agencés au sein du dispositif,
   1. le premier conduit reliant directement le premier échangeur de chaleur à la chambre de mixage en contournant le deuxième échangeur de chaleur, permettant ainsi au flux d’air froid de s’écouler du premier échangeur de chaleur directement dans la chambre de mixage,
   2. le deuxième conduit reliant le deuxième échangeur de chaleur à la chambre de mixage, permettant ainsi au flux d’air chaud de s’écouler du deuxième échangeur de chaleur directement dans la chambre de mixage,
   3. un troisième conduit X reliant le premier échangeur de chaleur au deuxième échangeur de chaleur permettant ainsi au flux d’air froid de s’écouler du premier échangeur de chaleur vers le deuxième échangeur de chaleur ;
9. le renfoncement a une profondeur comprise dans un intervalle [3 ; 30] millimètres ; autrement dit, le renfoncement a une hauteur ou profondeur allant de 3 millimètres jusqu’à 30 millimètres inclus.
10. le dispositif comprend au moins une bouche de sortie d’air agencé en aval de la chambre de mixage, chaque bouche de sortie d’air étant configuré pour guider le flux d’air notamment vers différentes régions d’un habitacle de véhicule, et au moins un conduits de sortie d’air longeant une paroi du canal d’écoulement de manière à orienter le flux d’air dans une direction sensiblement opposée à la direction du flux d’air lorsqu’il traverse le premier échangeur de chaleur;
11. le conduit de sortie d’air est défini d’une part par une paroi du boitier définissant le canal d’écoulement et d’autre part par une autre paroi externe agencée à l’extérieur du canal d’écoulement ;
12. le boitier comprend une entrée d’air et ledit conduit de sortie d’air est agencé sur la partie du boitier opposée à ladite entrée d’air ;
13. les premier et deuxième échangeurs de chaleur forment un angle compris dans un intervalle de 40° à 120 ;
14. le boîtier est de forme allongée et dans lequel un pulseur, le premier et le deuxième échangeurs de chaleur sont alignés dans un axe transversal dudit boîtier, le premier et le deuxième échangeurs de chaleur étant alignés dans un axe longitudinal dudit boîtier.

Particular embodiments according to the invention propose that:

1. the second sliding door is arranged so as to be able to close off the first air outlet mouth configured to guide the flow of air towards a ventilation nozzle;
2. a second distribution flap comprising a flag-type flap is arranged so as to be able to close off at least partially a second of said air outlet vents;
3. the second air outlet mouth is configured to guide a flow of air towards the defrost nozzle;
4. a third distribution shutter comprising a butterfly-type shutter is arranged so as to be able to close off at least partially a third of said air outlet mouths;
5. the third air outlet mouth is configured to guide a flow of air towards the nozzle of the feet;
6. the first sliding door is also movable along a curved trajectory;
7. the first sliding door comprises a recess so as to fluidly connect the first air duct and the second air duct, when said at least one mixing flap is arranged in an intermediate position between the first and second extreme positions;
8. a first heat exchanger, a second heat exchanger are arranged within the device,
   1. the first duct directly connecting the first heat exchanger to the mixing chamber bypassing the second heat exchanger, thus allowing the flow of cold air to flow from the first heat exchanger directly into the mixing chamber,
   2. the second duct connecting the second heat exchanger to the mixing chamber, thus allowing the flow of hot air to flow from the second heat exchanger directly into the mixing chamber,
   3. a third duct X connecting the first heat exchanger to the second heat exchanger thus allowing the flow of cold air to flow from the first heat exchanger to the second heat exchanger;
9. the recess has a depth comprised in an interval [3; 30] millimeters; in other words, the recess has a height or depth ranging from 3 millimeters up to 30 millimeters inclusive.
10. the device comprises at least one air outlet mouth arranged downstream of the mixing chamber, each air outlet mouth being configured to guide the flow of air in particular towards different regions of a vehicle passenger compartment, and at the at least one air outlet ducts running along a wall of the flow channel so as to direct the air flow in a direction substantially opposite to the direction of the air flow as it passes through the first heat exchanger;
11. the air outlet duct is defined on the one hand by a wall of the housing defining the flow channel and on the other hand by another outer wall arranged outside the flow channel;
12. the box comprises an air inlet and said air outlet duct is arranged on the part of the box opposite to said air inlet;
13. the first and second heat exchangers form an angle within a range of 40° to 120;
14. the casing is elongated and in which a pulser, the first and the second heat exchangers are aligned in a transverse axis of said casing, the first and the second heat exchangers being aligned in a longitudinal axis of said casing.

The invention also relates to a motor vehicle comprising a heating, ventilation and/or air conditioning device as described previously.

An aspect according to the invention provides that the second heat exchanger is arranged substantially horizontally with respect to the vehicle in the mounted state and that the first heat exchanger is arranged substantially vertically with respect to the vehicle in the mounted state. mounted.

Other characteristics and advantages of the invention will become apparent on reading the following description, with reference to the appended figures, which illustrate:

There illustrates a perspective view of the heating, ventilation and/or air conditioning device according to the invention;

There illustrates a side view of part of the heating, ventilation and/or air conditioning device according to the invention;

There illustrates a perspective view of part of the heating, ventilation and/or air conditioning device.

The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference is to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

The terms "upstream" and "downstream" are always in reference to the flow of an air stream circulating within the heating, ventilation and/or air conditioning device

On the and [Fig. 2] is schematized a trihedron XYZ where a longitudinal axis X of the heating, ventilation and/or air conditioning device 1 can correspond to the front/rear longitudinal axis of the vehicle. A transverse axis Y of the heating, ventilation and/or air conditioning device 1 may correspond to the right/left transverse axis of the vehicle, and a vertical axis Z of the heating, ventilation and/or air conditioning device 1 may correspond to the axis vertical top / bottom of the vehicle, each axis being perpendicular to each other in particular when the device 1 for heating, ventilation and / or air conditioning is installed in the motor vehicle.

To obtain a heating, ventilation and/or air conditioning device with a small vertical steric bulk, the invention as illustrated in , the invention proposes a heating, ventilation and/or air conditioning device 1 comprising a housing 2 of elongated shape defining a flow channel for an air flow intended to be distributed in the passenger compartment in which heat treatment means are housed of the airflow. In other words, as illustrated in [Fig. 2], the casing 2 defines, thanks to the walls 5, a flow channel 3, or a flow duct, for conveying a flow of air from an air inlet to an air outlet.

The heat treatment means comprise a first heat exchanger 4, for example an evaporator, intended to cool and dehumidify the entire flow of air circulating in the flow channel 3.

The heat treatment means also comprise a second heat exchanger 6, for example a radiator, intended to heat part of the flow of air circulating in the device 1 for heating, ventilation and/or air conditioning, and is arranged downstream, with respect to to the flow of the air flow, from the first heat exchanger 4. The second heat exchanger 6 can optionally be coupled to an additional electric heater intended to heat the air flow more quickly, in particular when starting the vehicle.

The air flow is introduced into the casing 2 via at least one air inlet 10 then is directed via a blower which for this purpose comprises a motor and a blade wheel. The blower conveys the flow of air from the air inlet 10 to at least one outlet, after having been heat treated by the heat exchangers 4, 6. The air inlet 10 corresponds to an air inlet box comprising two openings, an exterior air inlet 35 and a recycling air inlet 37 as illustrated in . A shutter can be arranged between the two openings to at least partially close each one. The air inlet 10 is arranged on the upper part with respect to the vertical axis Z of the device 1 for heating, ventilation and/or air conditioning.

The flow of air entering the box is conveyed from the air inlet 10 through a volute corresponding to a spiral part of the box. The volute has an air inlet corresponding to an orifice present within the case, also called casing, in a spiral. The volute presents a radial evolution starting from a point N called the nose of the volute, over an angle range that can go from 0° to 360°. The volute then has a volute outlet in the shape of a straight duct so that the airflow exiting the volute follows this same shape. The air flow then emerges in a part called the divergent which corresponds to a part of the rectilinear flow channel 3 having an enlargement in height along the axis Z. The air flow flows through the divergent until to the first heat exchanger 4.

Once the air flow has been cooled by the first heat exchanger 4, the device 1 comprises a third duct 50 (the first two ducts are described below) fluidically connecting the first heat exchanger 4 to the second heat exchanger. heat 6. Thus, the air flow allowing the cold air flow can flow from the first heat exchanger 4 to the second heat exchanger 6.

According to the embodiment illustrated in FIG. 2, to guarantee that the flow of cold air, coming from the first heat exchanger 4, is not thermally contaminated by the second heat exchanger 6, the device 1 comprises a first duct 52 bypassing the second heat exchanger 6. Thus, the flow of cold air, having passed through the first heat exchanger 4, circulates either through the second heat exchanger 6 via the third duct 50 to be reheated, or bypasses the second heat exchanger 6 via the first duct 52 to maintain its low temperature. The flow of air heated by the second heat exchanger 6 flows downstream of the latter within a second conduit 54.

The conduits 50,52,54 correspond to portions of the flow channel 3 and are separated from each other by internal partitions 56, or deflectors, or even by the heat exchanger 6 arranged between the third conduit 50 and the second conduit 54.

The flow of hot air and the flow of cold air circulating respectively in the second duct 54 and in the first duct 52 are then oriented to a mixing zone 18 to be mixed there and distributed to the outlet vents of air 12,14,16 at set temperatures. To produce this mixture in variable proportions, the device 1 comprises a mixing flap 30 making it possible to regulate the proportion of hot air flow from the second duct 54 and the proportion of cold air flow from the first duct 52.

The mixing flap 30 corresponds to a sliding door type flap, that is to say it comprises a first sliding door 30 on which is arranged at least one rack. In order to set the mixing flap 30 in motion, at least one gear 32 complementary to the rack is rotated around an axis by an actuator (not shown). The rotation of the gear 32 causes the movement of the first sliding door 30 between two extreme positions, a first extreme position where the mixing flap completely closes the first duct 52 so that the flow of cold air cannot access the mixing chamber 18 and a second extreme position where the mixing flap 30 closes off the second air duct 54 so that the air flow having passed through the second heat exchanger 6 cannot access the mixing chamber. mixing 18. The first sliding door 30 is configured to adopt any intermediate configuration.

In other words, the device 1 comprises at least a first conduit 52 for the flow of a first flow of air F1 corresponding to a flow of cold air, defining a first air outlet. The device comprises at least one second conduit 54 for the flow of a second air flow F2 corresponds to a flow of hot air, defining a second air outlet. The device 1 comprises at least one mixing chamber 18 communicating with the respective air outlets of said conduits 52,54. The device 1 further comprises at least one mixing flap 30 comprising the first sliding door 30 arranged so as to control the distribution of the first F1 and second F2 airflows in said at least one mixing chamber 18, said at least one mixing flap 30 being arranged to move between a first extreme position blocking the first air outlet of the first duct 52, and a second extreme position blocking the second air outlet of the second duct 54, and is movable between any intermediate position. According to the invention, said first sliding door 30 has at least one recess 33, so as to fluidly connect the first air duct 52 and the second air duct 54, when said at least one mixing flap 30 is arranged in an intermediate position between the first and the second extreme position.

The first sliding door 30 according to the invention comprises a recess 33, in other words a recess or recess. It can also be said that the first sliding door 30 has an omega profile section (or the sliding door has an omega profile), or that the sliding door has 4 bends, or 4 folds. This recess 33 has a height, relative to the dimensions of the flap, located in an interval between [3; 30] millimeters, we can also speak of depth between 3 and 30 millimeters. Such a depth guarantees that a sufficient flow rate of cold air flow can go from the first duct 52 to the second duct 54 and ensure satisfactory pre-mixing to limit stratification phenomena.

The mixing flap 30 can also be described as comprising a first sliding door made up of three substantially planar parts with a central part located between the two other end parts each being located at a longitudinal end of the mixing flap 30. The central part is connected at each end part by a section inclined or perpendicular to each substantially planar part so that the central part is offset vertically with respect to the two end parts. In other words, the end parts are arranged in the same plane while the central part is arranged in a separate plane and parallel to the plane of the end parts. The height, or depth, of the axial offset between the end parts and the central part corresponds to the recess 33.

The first sliding door 30 and more specifically the recess 33 makes it possible to define an additional channel 35 to convey part of the air flow F1 flowing within the first duct 52 through said at least one mixing flap 30 and within of the second conduit 54. In other words, the recess 33, or recess, makes it possible to define an additional channel 35 connecting the first conduit 52 and the second conduit 54, this when the mixing flap 30 is in an intermediate position between the first and second extreme position.

When the mixing flap 30 is in one of the two extreme positions, the two ducts 52,54 are no longer in fluid communication and either the cold air flow F1 or the hot air flow F2 enters the mixing chamber. 18. The first sliding door 30 may include seals to ensure a better seal.

The additional channel 35 is defined on the one hand by the first sliding door 33 and on the other hand by an internal partition 56 of the box. Thus, part of the first flow of air F1 corresponding to the flow of cold air circulating in the first conduit 52 can be conveyed in the second conduit 54 in which flows the second flow of air F2 corresponding to the flow of air hot. This makes it possible to have a pre-mix before the mixing chamber 18 and thus limits the phenomena of stratification. As illustrated in FIG. 2, it is thus ensured that the flow of air leaving through the air outlet vents 14 and 16 is not too hot since it has been previously mixed with part of the flow of cold F1 air.

As illustrated in FIG. 2, the device comprises a housing 60 in which the mixing flap is partially retracted when the latter is in an extreme position.

As illustrated in FIG. 2, the mixing flap 30 is slightly curved and adopts a curved trajectory. Of course, the mixing flap can be flat and adopt a flat trajectory.

The outlet includes several air outlet vents shown in distributing the air flows to nozzles opening into different regions of the passenger compartment. The first air outlet vent 14 is capable of bringing the flow of air towards the side/central ventilation nozzles, thus making it possible to cool/heat the passengers of the vehicle. The second air outlet vent 12 is configured to lead the air flow towards the de-icing nozzle, thus making it possible to demist the windshield. Finally, the third air outlet vent 16 directs the air flow towards the foot nozzle allowing the feet of the front passengers of the vehicle to be cooled/heated. Each air outlet vent can be associated with an air duct to convey the air flow to the corresponding nozzle.

The third air outlet mouth 16 called feet is associated with an air outlet duct 17 17 running along the flow channel 3, and more precisely the third duct 50, in the lower part, with respect to the vertical axis Z of device 1 for heating, ventilation and/or air conditioning. It can also be said that the so-called "feet" air outlet duct 17 is arranged on the part of the box 2 opposite the air inlet 10, or that the "feet" air outlet duct 17 runs along the lower or outer surface of the casing 2 of the heating, ventilation and/or air conditioning device 1, more precisely the "feet" air outlet duct 17 runs along the lower surface of the wall 5 of the casing 2 defining the flow 3. The wall 5 comprises an internal surface defining an internal volume corresponding to the flow channel 3 and an external surface arranged outside the flow channel 3, the air outlet duct 17 runs along the external surface of said wall 5. As illustrated in , the “feet” air outlet duct 17 extends from the mixing chamber 18 to a nozzle opening into the foot area of the passenger compartment. In other words, the foot air outlet duct 17 comprises an inlet corresponding to said third mouth 16 and then extends along the walls 5 of the box 2 as far as a foot nozzle. It can also be said that the air outlet duct 17 is juxtaposed, or secured, to the wall 5 of the box 2 so as to convey the flow of air in a direction substantially opposite to the direction of the flow of air passing through the first heat exchanger 4. It can also be said that the “feet” air outlet duct 17 directs the flow of air from the mixing chamber 18 to the apron, or the firewall, of the vehicle. It is thus understood that the air outlet duct 17 is defined on the one hand by a wall 5 of the box 2 defining the flow channel 3 and on the other hand by another outer wall 33 arranged outside the channel flow 3. For this, the conduit 17 air outlet "feet" includes at least one bend. Obviously, the invention is not limited to this specific embodiment.

A distribution flap is arranged at each air outlet mouth 12,14,16. Each distribution flap is configured to pass from a configuration where it completely blocks each air outlet vent to a configuration where it allows the air flow to circulate completely within the corresponding air outlet duct. Of course, each distribution flap is capable of adopting any intermediate position.

A first distribution shutter 22 of the sliding door type (better known by the English term "sliding door"), corresponding to a second sliding door 22 sliding within rails and on which is arranged at least one rack. In order to set the first distribution flap 22 in motion, at least one gear 24 complementary to the rack is rotated around an axis by an actuator (not shown). The rotation of the gear 24 causes the movement of the second sliding door 22 between two extreme positions, a first extreme position where the first distribution shutter 22 closes the first air outlet mouth 14 and a second extreme position where the first distribution flap 22 allows the air flow from the mixing chamber 18 to flow through the first air outlet vent 14.

As illustrated in Figure 2, the first distribution flap 22 is not flat, in other words the second sliding door 22 is curved, or concave in shape, and adopts a curved trajectory. We can also say that the second sliding door 22 is part of a plurality of planes. It is understood that the sliding door is movable in a direction which is not planar. The second sliding door slides in rails and these rails are inscribed in a plurality of planes. It can also be said that the trajectory of the first distribution flap is curved, the trajectory corresponding to the curve described by the moving flap.

In summary, the first sliding door 30 is arranged upstream of the mixing chamber 18 and the second sliding door 22 is arranged downstream of the mixing chamber 18, this with respect to the flow of the air flow.

In the second extreme position the dispensing flap 22 is arranged in a retracted housing 25 in which the door 22 is partially retracted. The recess 25 has dimensions (length, width) greater than or equal to those of the first air outlet mouth 14 so as not to hinder the flow of the air flow. The device 1 can include a second recess 25 in order to partially retract the second sliding door 22 in the other extreme position. This improves the seal compared to a sliding door only abutting against a wall since the recess 25 creates a labyrinth for the air flow.

A second distribution flap 20 of the flag type, corresponding to a door with a rotation shaft arranged at one of the ends of the door, is arranged at the level of the second air outlet mouth 12.

A third distribution shutter 26 of the butterfly type, corresponding to a shutter with a rotation shaft and one or two blades arranged on either side of the rotation shaft, is arranged at the level of the third outlet mouth of air 16 and makes it possible to close or not the air outlet duct 17 called "feet".

The first distribution flap 22, the second distribution flap 20 and the third distribution flap 26 are of different type, or of different nature, namely a sliding door, a flag flap and a butterfly flap. In other words, the first distribution flap 22 is of a different type from the second distribution flap 20 and from the third distribution flap 26, the second and third distribution flaps also being of a different type.

The first distribution flap 22, the second distribution flap 20 and the third distribution flap 26 are all arranged downstream of the mixing chamber 18 with respect to the flow of the air flow.

The first heat exchanger 4 comprises two collecting chambers and a heat bundle comprising a set of tubes or plates and it is considered here that the heat bundle defines a plane. The second heat exchanger 6 comprises two collecting chambers and a thermal beam comprising a set of tubes or plates and it is considered here that the thermal beam defines a plane, the two heat exchangers 4.6 are inscribed in substantially orthogonal planes this allows considerable gain in height.

In order to limit the steric constraints even more, the angle between the plane of the first heat exchanger 4 and the plane of the second heat exchanger 6 is included in an interval ranging from [40° to 120°].

According to the invention, the device 1 comprises an evacuation duct making it possible to guide the condensates towards the outside of the box 2.

Claims (9)

Device (1) for heating, ventilation and/or air conditioning for a motor vehicle, comprising a casing (2) defining a flow channel (3) for an air flow with

1. at least a first duct (52) for the flow of a first air flow (F1), defining a first air outlet,
2. at least one second duct (54) for the flow of a second air flow (F2), defining a second air outlet,
3. at least one mixing chamber (18) communicating with the respective air outlets of said ducts (52, 54), and
4. at least one mixing flap (30) comprising a first sliding door (30) arranged so as to control the distribution of the first (F1) and second (F2) air flows in said at least one mixing chamber (18), said at least one mixing flap (30) being arranged to move between a first extreme position closing the first duct (52), and a second extreme position closing the second duct (54),
5. at least one air outlet mouth (12,16,18) arranged downstream with respect to the flow of the air flow from the mixing chamber (18) characterized in that
6. the device further comprises a first distribution shutter (22) comprising a second sliding door (22) arranged so as to be able to close off at least partially one of said air outlet mouths (12,14,16), said second door slider (22) being movable along a curved trajectory.

Device (1) according to Claim 1, in which the second sliding door (22) is arranged so as to be able to close off the first air outlet mouth (14) configured to guide the flow of air towards a ventilation nozzle. Device (1) according to one of Claims 1 or 2, in which a second distribution flap (20) comprising a flag-type flap is arranged so as to be able to close off at least partially a second of the said air outlet openings ( 12). Device (1) according to claim 4 wherein the second air outlet mouth (12) is configured to guide a flow of air towards the defrost nozzle. Device (1) according to one of Claims 1 to 3, in which a third distribution flap (26) comprising a butterfly-type flap is arranged so as to be able to close off at least partially a third of the said air outlet mouths ( 16). Device (1) according to claim 5, wherein the third air outlet mouth (16) is configured to guide a flow of air towards the foot nozzle. Device (1) according to one of the preceding claims, in which the first sliding door (30) is also movable along a curved path. Device (1) according to one of the preceding claims, in which the first sliding door (30) comprises a recess (33) so as to fluidically connect the first air duct (52) and the second air duct (54 ), when said at least one mixing flap (30) is arranged in an intermediate position between the first and second extreme positions. Motor vehicle characterized in that it comprises a device (1) for heating, ventilation and/or air conditioning according to one of the preceding claims