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

Abstract

The present invention relates to a heating, ventilation and / or air conditioning device (1) for a motor vehicle, comprising a housing (2) defining a flow channel (3) for airflow and including a first heat exchanger (4), a second heat exchanger (6), a bypass path (28) around the second heat exchanger (6), and at least one air outlet duct (12, 14, 16), the first heat exchanger (4) and the second heat exchanger (6) being arranged in a substantially orthogonal plane, the at least one air outlet duct (12, 14, 16) being configured to guide airflow, particularly toward at least one area in the passenger compartment of the vehicle. According to the invention, a mixing baffle (30) including a sliding door is arranged in the flow channel (3) to close the bypass path (28) and / or the second heat exchanger (6), and the housing (2) further includes at least one fastening device (50) for attaching the housing (2) to a wall (52) including an opening, the housing (2) being fastenable to a single face of the wall (52) and arranged on both sides of the wall (52). The invention also relates to motor vehicles including devices of the type described above.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation and / or air conditioning systems for motor vehicles, and also to motor vehicles including such systems. Background Technology

[0002] Motor vehicles are typically equipped with ventilation, heating, and / or air conditioning systems to regulate the aerodynamic thermal parameters of airflow distributed toward the interior of the vehicle's passenger compartment. These systems typically include an enclosure divided by partitions, with openings within the enclosure including at least one air inlet and at least one air outlet.

[0003] In a known manner, the enclosure houses a blower to allow airflow from an air inlet to an air outlet. The enclosure also houses heat treatment components for heating and / or cooling the airflow before it is distributed into the passenger compartment. For example, the heat treatment components may include an evaporator designed to cool and dehumidify the airflow passing through it, and a radiator that may be associated with an additional radiator designed to heat the airflow passing through it.

[0004] In these devices, an evaporator is positioned downstream of the air inlet, dehumidifying the entire airflow entering the housing. The resulting cold airflow is then allowed into the main mixing chamber and / or directed towards heating elements, particularly radiators and possibly additional radiators, to obtain a hot airflow. The main mixing chamber is used to mix one or more cold and / or hot airflows, such that airflows from the mixture with a desired setpoint temperature are distributed toward specific areas of the vehicle's passenger compartment. The main mixing chamber is provided with at least one mixing element to define the proportion of cold and hot airflows entering the main mixing chamber from the heating chamber. This element allows for the adjustment of the temperature of the mixed airflow, intended to be distributed to specific areas (one or more) of the passenger compartment, such as the front and rear areas, or the left and right sides, of the vehicle's passenger compartment.

[0005] While such heating, ventilation, and / or air conditioning units allow for ventilation management in multiple areas of a vehicle, there are many limitations in terms of their size and weight. In fact, heating, ventilation, and / or air conditioning units are typically placed below the dashboard of a motor vehicle, meaning the dashboard is raised, thus limiting the driver's visibility.

[0006] In other words, the housings of the heating, ventilation, and / or air conditioning units are installed in the passenger compartment, between the vehicle's dashboard and a wall, typically referred to as a partition or firewall, that separates the passenger compartment from the vehicle's engine compartment. However, for the comfort of the vehicle's passengers, it is desirable to have as much interior space as possible in the passenger compartment. In other words, to maintain acceptable comfort, it is desirable to reduce the volume of certain components, such as the dashboard. Such a reduction in size makes it impossible to position the heating, ventilation, and / or air conditioning equipment as known in the prior art. Summary of the Invention

[0007] The purpose of this invention is to optimize the volume of heating, ventilation and / or air conditioning units.

[0008] Therefore, the present invention provides a heating, ventilation, and / or air conditioning device for a motor vehicle, comprising a housing defining a flow channel for airflow, wherein a first heat exchanger and a second heat exchanger are arranged in the housing, the first and second heat exchangers being located in substantially orthogonal planes, a bypass path for the second heat exchanger, and at least one air outlet duct configured to guide airflow, particularly toward at least one area of ​​the vehicle's passenger compartment, and a mixing baffle including a sliding door is arranged in the flow channel to close the bypass path and / or the second heat exchanger. According to the invention, the housing further includes at least one fixing device capable of securing the housing to a wall including an opening, and the housing being capable of being fastened to a single face of the wall and being disposed on both sides of the wall.

[0009] In this way, the present invention enables heating, ventilation, and / or air conditioning units that are smaller in size than those of the prior art. In fact, the arrangement of two baffles, including sliding doors, at different locations within the heating, ventilation, and / or air conditioning unit, and the arrangement of the housing on both sides of the wall, allows for optimal limitation of the height of the equipment.

[0010] Other aspects of the invention are described below and may be used alone or in combination.

[0011] According to one aspect of the invention, the fixing device corresponds to one of two elements having complementary shapes, one arranged on the housing and the other arranged on the wall.

[0012] According to one aspect of the invention, the fixing device corresponds to one of two elements having complementary shapes, the first element being arranged on the housing and the second element being able to be arranged on the wall.

[0013] According to another aspect of the invention, the fixing device corresponds to a bolt and a lug assembly.

[0014] According to another aspect of the invention, two heat exchangers can be arranged on the same side of the wall, and the at least one air outlet duct can be arranged on the other side of the wall.

[0015] According to another aspect of the invention, a third heat exchanger corresponding to an electric radiator is arranged downstream of the second heat exchanger relative to the airflow, the third heat exchanger including a wired power supply.

[0016] According to another aspect of the invention, the first and second heat exchangers form an angle in the range of 40° to 120°.

[0017] According to another aspect of the invention, the outer casing includes a recess into which the end of the wall is accommodated and abuts against the outer casing.

[0018] According to one aspect of the invention, a second distribution baffle, including a sliding door, is arranged to at least partially close the first air outlet duct in the air outlet duct.

[0019] According to another aspect of the invention, the second distribution baffle is arranged to close the air outlet duct, which is configured to direct airflow to the ventilation nozzle.

[0020] According to another aspect of the invention, a first distribution baffle, including a flag-shaped baffle, is arranged to at least partially close the second air outlet duct in the air outlet duct.

[0021] According to another aspect of the invention, the second air outlet duct is configured to direct airflow to a nozzle designed to open into the passenger compartment at the level of the vehicle passenger's feet.

[0022] According to another aspect of the invention, a third distribution baffle, including a butterfly baffle, is arranged to at least partially close the third air outlet duct in the air outlet duct.

[0023] According to another aspect of the invention, the third air outlet duct is configured to direct airflow to the defrost nozzle.

[0024] According to another aspect of the invention, the first and second heat exchangers form an angle in the range of 40° to 120°.

[0025] According to another aspect of the invention, the air outlet duct is defined on one hand by a wall of a housing that defines the flow channel, and on the other hand by another outer wall disposed outside the flow channel.

[0026] According to another aspect of the invention, the nozzle is arranged below the first heat exchanger relative to the vertical axis Z.

[0027] According to another aspect of the invention, the housing includes an air inlet, and the air outlet duct is arranged on the portion of the housing opposite to the air inlet.

[0028] According to another aspect of the invention, the housing is elongated, and the blower, the first and second heat exchangers are aligned on the transverse axis of the housing, and the first and second heat exchangers are aligned on the longitudinal axis of the housing.

[0029] The present invention also relates to a motor vehicle including heating, ventilation and / or air conditioning devices as described above.

[0030] According to one aspect of the invention, the second heat exchanger is arranged to be substantially horizontal relative to the vehicle in the installed state, and the first heat exchanger is arranged to be substantially vertical relative to the vehicle in the installed state.

[0031] According to one aspect of the invention, a vehicle includes an engine compartment and a passenger compartment separated by a partition including an opening, with a housing fixed to one side of the partition such that two heat exchangers are arranged in the engine compartment and the at least one air outlet duct is arranged in the passenger compartment. Attached Figure Description

[0032] Other features and advantages of the invention will become apparent from the accompanying drawings and the following description, in which:

[0033] Figure 1 A perspective view of a heating, ventilation and / or air conditioning unit according to the present invention is shown;

[0034] Figure 2 A side view of a portion of a heating, ventilation and / or air conditioning unit according to the present invention is shown;

[0035] Figure 3 A perspective view of a portion of a heating, ventilation, and / or air conditioning unit is shown;

[0036] Figure 4 A perspective view showing the arrangement of heating, ventilation and / or air conditioning units according to the present invention within a motor vehicle is shown. Detailed Implementation

[0037] The following embodiments are examples. Although the description relates to one or more embodiments, this does not necessarily mean that every reference relates to the same embodiment, or that a feature is applicable only to a single embodiment. Various features of different embodiments may also be combined or interchanged to provide other embodiments.

[0038] The terms “upstream” and “downstream” always refer to the flow of air circulating within a heating, ventilation and / or air conditioning unit.

[0039] [ Figure 1 ]and[ Figure 2 The diagram schematically illustrates an XYZ trihedron, wherein the longitudinal axis X of the heating, ventilation, and / or air conditioning unit 1 may correspond to the front / rear longitudinal axis of the vehicle. The lateral axis Y of the heating, ventilation, and / or air conditioning unit 1 may correspond to the right / left lateral axis of the vehicle, and the vertical axis Z of the heating, ventilation, and / or air conditioning unit 1 may correspond to the top / bottom vertical axis of the vehicle. In particular, when the heating, ventilation, and / or air conditioning unit 1 is installed in a motor vehicle, each axis is perpendicular to the others.

[0040] To obtain heating, ventilation, and / or air conditioning units with a smaller vertical space volume, such as Figure 1 As shown, the present invention provides a heating, ventilation, and / or air conditioning device 1, which includes an elongated housing 2 defining a flow channel for airflow for distribution within a passenger compartment, and devices for heat treatment of the airflow are housed within this channel. In other words, as Figure 2 As shown, the outer casing 2 defines a flow channel 3 or flow pipe through the wall 5 for conveying airflow from the air inlet to the air outlet.

[0041] The housing 2 defines the flow channel 3; in other words, no other element is combined with the housing 2 to define a portion of the flow channel 3. The flow channel 3 can also be described as a single piece. The housing can be in the form of a single block (made from a single component), or it can be made from multiple blocks or modules assembled together, each of which individually defines the flow channel 3.

[0042] The heat treatment device includes a first heat exchanger 4, such as an evaporator, which is designed to cool and dehumidify the entire airflow passing through the flow channel 3.

[0043] The heat treatment device also includes a second heat exchanger 6, such as a radiator, which is designed to heat a portion of the airflow circulating in the heating, ventilation and / or air conditioning unit 1 and is arranged downstream of the first heat exchanger 4 relative to the flow of the airflow.

[0044] According to a particular embodiment, the second heat exchanger 6 is coupled to a third heat exchanger 7, which corresponds to an additional electric radiator, such as an electric radiator with a PTC (positive temperature coefficient) rod. An HV PTC (high voltage positive temperature coefficient) heater may also be mentioned. The third heat exchanger 7 is designed to heat the airflow more quickly, especially when starting the vehicle.

[0045] For this purpose, airflow is introduced into housing 2 through at least one air inlet 10, and then guided by a blower comprising a motor and impeller. After the airflow has been heat-treated by heat exchangers 4 and 6, the blower guides the airflow from air inlet 10 to at least one outlet. Air inlet 10 corresponds to an air inlet housing and includes two openings: an external air inlet 35 and a recirculated air inlet 37, as shown below. Figure 3 As shown. A baffle may be arranged between the two openings to at least partially close each opening. The air inlet 10 is arranged at the top relative to the vertical axis Z of the heating, ventilation and / or air conditioning unit.

[0046] Exports include Figure 2 The diagram shows multiple air outlet ducts that distribute airflow to nozzles leading to different areas of the passenger compartment. Each air outlet duct includes a nozzle corresponding to its inlet. Specifically, the outlets include a first air outlet duct 12 configured to direct airflow to defrost nozzles, thereby enabling defrosting of the windshield. The outlets also include a second air outlet duct 14 capable of directing airflow to side / center ventilation nozzles, thereby enabling cooling / heating for the vehicle's passengers. Finally, the outlets include a third air outlet duct 16 directing airflow to foot nozzles, thereby enabling cooling / heating of the feet of the front-seat passengers.

[0047] According to a specific embodiment not shown, the third air outlet duct 16 may have a specific shape, wherein the duct extends along the flow channel 3 at its lower portion relative to the vertical axis Z of the heating, ventilation, and / or air conditioning unit 1. Alternatively, the air outlet duct 16 may be arranged on the portion of the housing 2 opposite to the air inlet 10, or the air outlet duct 16 may extend along the lower or outer surface of the housing 2 of the heating, ventilation, and / or air conditioning unit 1; more precisely, the air outlet duct 16 extends along the lower surface of the wall 5 of the housing 2 that defines the flow channel 3. The wall 5 includes an inner surface defining an internal volume corresponding to the internal volume of the flow channel 3 and an outer surface disposed outside the flow channel 3, along which the air outlet duct 16 extends.

[0048] like Figure 2 As shown, each air outlet duct 12, 14, 16 extends from the mixing chamber 18, which will be described later, to a nozzle, and the nozzle corresponds to the outlet of each duct 12, 14, 16, leading to different areas of the passenger compartment.

[0049] Distributor baffles are arranged at each nozzle or inlet of air outlet ducts 12, 14, and 16. Each distributor baffle is configured to change from a configuration that completely closes the inlet of each air outlet duct to a configuration that allows airflow to pass fully within the corresponding air outlet duct. Clearly, each distributor baffle can be positioned in any intermediate location.

[0050] A first flag-shaped baffle 20 is disposed at the inlet of the first air outlet duct 12. This first flag-shaped baffle 20 corresponds to a door having a rotation axis disposed at one of its ends. A sliding second baffle 22, also referred to as a sliding door, corresponds to a sliding door on which at least one rack is disposed. To move the second baffle 22, at least one gear 24 complementary to the rack is rotated about an axis by an actuator (not shown). The rotation of the gear 24 drives the sliding door 22 to translate between two end positions. In the first end position, the second baffle 22 closes the inlet of the second air outlet duct 14. In the second end position, the second baffle 22 allows a flow of cold air from the mixing chamber 18 to enter the second air outlet duct 14. A third baffle 26, as a butterfly-shaped baffle, corresponds to a baffle having a rotation axis and one or two blades disposed on either side of the rotation axis. This third baffle 26 is disposed at the inlet of the third air outlet duct 16, and allows the third air outlet duct 16 to be optionally closed.

[0051] like Figure 2 As shown, the second distributing baffle 22 is not flat; in other words, the sliding door is curved or concave and follows a curved trajectory. Alternatively, the second sliding door 22 is tangent to multiple planes. It should be understood that the sliding door can move in non-flat directions. The second sliding door slides in tracks, and these tracks are tangent to multiple planes. Also, the trajectory of the first distributing baffle is curved, corresponding to the curve traced by the moving baffle.

[0052] The first heat exchanger 4 includes two collection chambers and a heat beam comprising a set of tubes or plates, and the heat beam is considered to define a plane E. The second heat exchanger 6 includes two collection chambers and a heat beam comprising a set of tubes or plates, and the heat beam is considered to define a plane R. The third heat exchanger 7 extends in a plane parallel to plane R so that the third heat exchanger 7 can be connected to or fixed to the second heat exchanger 6.

[0053] To improve height, the second heat exchanger 6 is tangent to plane R, which is orthogonal to the plane of the air inlet of the volute. Referring to the vehicle, the plane E of the first heat exchanger 4 substantially corresponds to plane YZ defined by the vehicle's transverse and vertical axes, while the plane R of the second heat exchanger 6 substantially corresponds to plane XY defined by the vehicle's longitudinal and transverse axes. In other words, once installed, the second heat exchanger 6 is arranged substantially horizontally relative to the heating, ventilation, and / or air conditioning unit 1, or even relative to the vehicle itself. Therefore, this allows for a considerable improvement in height.

[0054] To further constrain the space, the angle between the plane E of the first heat exchanger 4 and the plane R of the second heat exchanger 6 is included in the range of 40° to 120°. According to a particular embodiment, the first and second heat exchangers 4 and 6 are located in substantially orthogonal planes, more specifically, in orthogonal planes.

[0055] According to the invention, the device 1 includes a discharge pipe that allows condensate to be directed to the outside of the housing 2. To reduce the height of the device, the discharge pipe is flat and extends in a direction substantially parallel to the plane R of the second heat exchanger 6. In other words, the discharge pipe has a flow channel with a circular-rectangular cross-section or any other cross-section with a width exceeding its height, such as an ellipse or rectangle.

[0056] The airflow entering the casing is conveyed from air inlet 10 through a volute corresponding to a portion of the spiral casing. The volute has an air inlet corresponding to an orifice present within the spiral casing (also called the housing). The volute expands radially from point N, called the volute nose, in an angular range from 0° to 360°. Thus, the volute has a volute outlet with a straight pipe shape, such that the airflow exiting the volute follows the same shape. The airflow then terminates at a section called the diffuser, which corresponds to the portion where the height of the straight flow channel 3 increases along the axis Z. The airflow flows upwards directly through the diffuser to the first heat exchanger 4.

[0057] Once the airflow has been cooled by the first heat exchanger 4, it is guided to the second heat exchanger 6 within the flow channel 3. According to... Figure 2 In the illustrated embodiment, to ensure that the cold airflow from the first heat exchanger 4 is not thermally contaminated by the second heat exchanger 6, the device 1 includes a bypass path 28 for the second heat exchanger 6. Therefore, the cold airflow that has passed through the first heat exchanger 4 flows through the second heat exchanger 6 to be heated, or bypasses the second heat exchanger 6 via the bypass path 28 to maintain its low temperature.

[0058] The hot and cold air streams are then directed toward the mixing zone 18, where they are mixed and distributed at a set temperature to the nozzles or inlets of the outlet pipes 12, 14, and 16. To achieve this mixing in a variable ratio, the device 1 includes a mixing baffle 30, which allows adjustment of the ratio of the cold air stream passing through the second heat exchanger 6 to the ratio of the cold air stream passing through the bypass path 28.

[0059] The mixing baffle 30 corresponds to a sliding baffle, that is, it includes a sliding door on which at least one rack is arranged. To move the mixing baffle 30, at least one gear 32, complementary to the rack, rotates about an axis via an actuator (not shown). The rotation of the gear 32 drives the sliding door 30 to translate between two end positions. In the first end position, the mixing baffle completely closes the bypass path 28 of the second heat exchanger 6. In the second end position, the mixing baffle 30 closes the air passage downstream of the second heat exchanger 6, preventing airflow that has already passed through the second heat exchanger 6 from entering the mixing chamber 18.

[0060] Figure 2 The mixing baffle 30 shown is arranged downstream of the second heat exchanger 6; however, it can be arranged between the first and second heat exchangers 4 and 6.

[0061] The sliding door of the mixing baffle 30 may include a recess, in other words, a cavity or indentation. Alternatively, the first sliding door 30 may have an omega-shaped profile (or the sliding door may have an omega-shaped profile), or the sliding door may have four elbows or four bends. The height of the recess is in the range of 3-30 mm relative to the size of the baffle; a depth between 3 and 30 mm may also be mentioned. Such a depth ensures sufficient cold air flow from the first cold air duct corresponding to the portion of the flow channel 3 at the bypass path 28 to the hot air duct corresponding to the portion of the flow channel 3 downstream of the second and third heat exchangers, and thus ensures satisfactory premixing to limit stratification.

[0062] According to the invention, the housing 2 further includes at least one fixing device 50 for fixing to a wall including an opening, the housing 2 being capable of being fastened to a single surface of the wall and being capable of being arranged on both sides of the wall. In other words, the housing 2 is fixed to the wall 52 only on one side of the wall 52, however, the housing extends on both sides of the wall 52, the wall 52 including an opening, such that the housing 2 can be arranged through the wall 52, partly on one side of the wall 52 and partly on the other side of the wall 52.

[0063] Wall 52, for example, corresponds to the vehicle partition that separates the engine compartment M from the passenger compartment H. Figure 3 and Figure 4 As shown, the heat exchange section, including air inlet 10 and three heat exchangers 4, 6, 7, is arranged on one side or one face of wall 52, particularly on the side of engine compartment M, while the distribution section, including air outlet ducts 12, 14, 16, is arranged on the other side or face of wall 52. In other words, to allow for greater exchange between the exchangers as needed, it is preferable that the three heat exchangers 4, 6, 7 are arranged on the same side of wall 52, particularly on the engine compartment side.

[0064] According to a specific embodiment, the second exchanger 6, the third exchanger 7, and the mixing chamber 18 may be partially arranged on both sides of the wall 52, such as... Figure 2 As shown, in this configuration, 90% of the two heat exchangers 6 and 7 are arranged on one side of the engine compartment M, and 10% are arranged on the side of the passenger compartment H. For this purpose, preferably, the third heat exchanger 7 has a wired power supply, that is, a remote power supply with wires supplying power to the electric radiator. The power supply, in other words, the connection of the wires to the support frame of the PTC stone, is arranged on one side of the engine compartment M, although according to another embodiment it can be located on the side of the passenger compartment H.

[0065] The housing 2 according to the invention includes a fastening device 50 for securing the housing 2 to a wall 52. The fastening device 50 corresponds to two elements having complementary shapes, one arranged on the housing 2 and the other on the wall 52. For example, a bolt / lug assembly can be used, wherein the bolt is arranged on the wall 52 and the lug is located on the housing 2. Alternatively, the wall 52 may have an opening or a recess, and the housing 2 may have one or more hooks or any other elements protruding from the housing 2 having a shape complementary to the opening. The invention is not limited in terms of the nature of the fastening between the wall 52 and the housing 2.

[0066] The housing 2 preferably includes at least one protrusion 54 abutting against the side of the wall 52, and a foam or polymer seal can be feasiblely arranged between the wall 52 and the housing 2 at the level of the protrusion 54 abutting against the wall 52. The protrusion 54, and therefore the seal 54, extends around or around the opening in the wall 52. A fastening device 50 can be arranged on the protrusion 54. The protrusion 54 can correspond to a connecting tab or a connecting side.

[0067] The protruding portion 54 can be arranged on the outer shell 2 so as to abut against the wall 52 on the passenger compartment H side or the engine M side.

[0068] According to another embodiment, the housing 2 may include a recess or groove, the end of the wall 52 being received in the recess or groove and abutting against the housing. A seal may be arranged between the two elements.

[0069] according to Figure 4 In the illustrated embodiment, the air inlet 10, particularly the external air inlet 35 and the recirculating air inlet 37, is arranged at the bottom or lower part of the housing 2 relative to the vertical axis Z. In other words, the external air inlet 35 and the recirculating air inlet 37 are arranged on the side of the housing 2 opposite to the first air outlet duct 12 leading to the defrosting nozzle. Alternatively, the external air inlet 35 and the recirculating air inlet 37 are arranged on the same side of the housing 2 as the third air outlet duct 16 leading to the foot nozzle.

[0070] To allow recirculated air to enter the recirculated air inlet 37, the partition 52 also includes a second opening.

[0071] Due to the arrangement of the heat exchanger and the use of sliding doors, the heating, ventilation, and / or air conditioning unit according to the invention has a reduced dimension in height or the Z direction, thus making it sufficiently flat to pass through the opening in the partition. In practice, this opening is limited to a precise size, typically 180 to 220 mm, resulting in conventional heating, ventilation, and / or air conditioning units larger than 300 mm being divided into two modules (separate HVAC), where the partition forms part of the flow channel, or is not simply arranged in the passenger compartment H under the dashboard. The housing 2 according to the invention allows its height to be limited to approximately 200-210 mm, resulting in a portion of the housing 2 being able to pass through the opening in the wall 52, and allowing one portion, the hot section, to be located in the engine compartment M, which in particular includes noise-generating elements such as the motor of the motor fan unit (blower), while the other portion, the distribution section, is located in the passenger compartment H.

[0072] The invention described above is not limited to the devices and configurations specifically described for particular embodiments, but also applies to all combinations of such devices or configurations, as well as equivalents and any combination of such devices or configurations with equivalents.

Claims

1. A heating, ventilation and / or air conditioning device (1) for a motor vehicle, comprising a housing (2) defining a flow channel (3) for airflow, wherein a blower, a first heat exchanger (4), a second heat exchanger (6), a bypass path (28) of the second heat exchanger (6), and at least one air outlet duct (12, 14, 16) are arranged therein, the first heat exchanger (4) and the second heat exchanger (6) being located in substantially orthogonal planes, the at least one air outlet duct (12, 14, 16) being configured to direct airflow to at least one area of ​​the vehicle passenger compartment, and a mixing baffle (30) including a sliding door being arranged in the flow channel (3) to be able to close the bypass path (28) and / or the second heat exchanger (6), characterized in that, The housing (2) further includes at least one fixing device (50) capable of fixing the housing (2) to a wall (52) including an opening, wherein the housing (2) is capable of being fastened to a single face of the wall (52) and arranged on both sides of the wall (52) separating the engine compartment from the passenger compartment, wherein the first heat exchanger (4) and the second heat exchanger (6) are arranged on the same side of the wall (52), the same side being the engine compartment side, and the at least one air outlet duct (12, 14, 16) is arranged on the other side of the wall (52), the blower, the first heat exchanger (4) and the second heat exchanger (6) are aligned on the transverse axis (Y) of the housing (2), and the first heat exchanger (4) and the second heat exchanger (6) are aligned on the longitudinal axis (X) of the housing.

2. The apparatus (1) according to claim 1, wherein, The fixing device (50) corresponds to a dual element having complementary shapes, the first element being arranged on the housing (2) and the second element being able to be arranged on the wall (52).

3. The apparatus (1) according to claim 2, wherein, The fixing device (50) corresponds to the bolt and lug assembly.

4. The apparatus (1) according to any one of claims 1 to 3, wherein, A third heat exchanger (7) corresponding to an electric radiator is arranged downstream of the second heat exchanger (6) relative to the airflow, and the third heat exchanger (7) includes a wired power supply.

5. The apparatus (1) according to any one of claims 1 to 3, wherein, The first heat exchanger (4) and the second heat exchanger (6) form an angle in the range of 40° to 120°.

6. The apparatus according to any one of claims 1 to 3, wherein, The outer casing (2) includes a recess, and the end of the wall (52) is accommodated in the recess and abuts against the outer casing (2).

7. A motor vehicle, characterized in that, The motor vehicle includes a heating, ventilation and / or air conditioning unit (1) according to any one of the preceding claims.

8. The motor vehicle according to claim 7, wherein, The vehicle includes an engine compartment (M) and a passenger compartment (H) separated by a partition including an opening, the outer shell (2) being fixed to one side of the partition such that the first heat exchanger (4) and the second heat exchanger (6) are at least partially arranged in the engine compartment (M), and the at least one air outlet duct (12, 14, 16) is arranged in the passenger compartment (H).

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