Motor support and motorised fan unit for a heating, ventilation and / or air-conditioning system of a corresponding vehicle, in particular a motor vehicle

Abstract

The invention relates to a motor support (7) for a motor for driving a fan wheel, in particular a motorised fan unit of a heating, ventilation and / or air-conditioning system of a motor vehicle, the motor support (7) having a base (70) which comprises an internal structure (71), and defining a cooling channel (73) around the internal structure (71), in which channel an air flow (F) is intended to circulate, the cooling channel (73) having at least one air inlet (74) and at least one air outlet (75). The internal structure (71) has a projection (76) which is arranged opposite the air inlet (74), the projection (76) extending from the internal structure (71) towards the air inlet (74) so as to divide the air flow (F) which is intended to come from the air inlet (74) and circulate in the cooling channel (73). The invention also relates to a motorised fan unit comprising such a motor support (7).

Description

Description Title of the invention: MOTOR SUPPORT AND MOTOR-FAN UNIT OF A HEATING, VENTILATION AND / OR AIR CONDITIONING INSTALLATION OF A VEHICLE, IN PARTICULAR A CORRESPONDING MOTOR VEHICLE

[0001] The present invention relates to the field of heating, ventilation and / or air conditioning installations for vehicles, particularly motor vehicles. The invention relates more particularly to a motor support for a fan wheel, particularly of a motor-fan unit. The invention also relates to a motor-fan unit of a heating, ventilation and / or air conditioning installation comprising such a motor support.

[0002] Vehicles, particularly motor vehicles, are commonly equipped with a heating, ventilation and / or air conditioning system, which creates an airflow in the passenger compartment. Such a system also makes it possible to manage the temperature and distribution of the airflow created within the passenger compartment. Such a heating, ventilation and / or air conditioning system comprises, among other things, a fan comprising a fan wheel driven in rotation by a drive motor, particularly an electric motor. The electric motor may in particular be electronically commutated, controlled by a control module.

[0003] An electronically commutated electric motor, or brushless direct current motor (also known as "brushless"), comprises a rotor and stator assembly, each of these components carrying electromagnetic elements whose interaction generates the movement of the rotor relative to the stator, and thus the movement of the fan wheel.

[0004] The electric motor is assembled in the heating, ventilation and / or air conditioning system by means of a motor support which includes a base with an internal structure allowing the fixing of the electric motor, more precisely the stator.

[0005] The engine and control module contain components that heat up during use; it is therefore necessary to ensure cooling of the engine and / or control module.

[0006] For this purpose, it is known to exploit the air flow circulating inside the heating, ventilation and / or air conditioning system. To do this, a fraction of the air flow generated by the motor-fan unit is sampled and routed to the engine mount. Thus, the base of the engine mount includes at least one cooling channel to channel the sampled air flow. The cooling channel is generally shaped to guide the sampled air flow to the engine or the control module.

[0007] A constant objective is to optimize the cooling performance of the engine or control module, and to increase the airflow performance of the motor-fan unit. Furthermore, the implementation of the cooling channel must not hinder easy installation of the motor-fan unit.

[0008] The aim of the present invention is to propose an engine support, in particular for a motor-fan unit of a heating, ventilation and / or air conditioning installation of a motor vehicle, which is simple to produce and optimizes cooling performance. Another aim of the present invention is to increase the overall airflow performance.

[0009] To this end, the invention relates to a motor support for a motor driving a fan wheel, in particular a motor-fan unit of a heating, ventilation and / or air conditioning installation of a motor vehicle, the motor support comprising a base, the base comprising an internal structure configured for fixing the motor, and defining a cooling channel around the internal structure and in which an air flow is intended to circulate for cooling the motor and / or a motor control module intended to be fixed to the motor support, the cooling channel having at least one air inlet and at least one air outlet.

[0010] According to the invention, the internal structure has a projection arranged opposite the air inlet, the projection extending from the internal structure towards the air inlet, so as to divide the air flow intended to come from the air inlet and to circulate in the cooling channel.

[0011] Such a base defines a specific air channel for the cooling function of the engine and / or the control module, and the projection allows the airflow intended to circulate in this channel to be separated. This projection allows turbulence to be generated and the speed of the airflow to be increased.

[0012] The engine mount may further include one or more of the following features described below, taken separately or in combination.

[0013] The projection may have an evolving form.

[0014] For example, the projection has a shape that tapers towards the air inlet.

[0015] The projection may have an end which may be arranged opposite a central or substantially central area of ​​the air inlet.

[0016] The projection may have two concave surfaces extending on either side of the end. The concavity of these surfaces is, for example, oriented towards the cooling channel. Such concave surfaces make it possible to reduce the speed of the inlet air flow and to guide the air flow towards the inside of the cooling channel without creating turbulence, thus facilitating the flow of the air flow.

[0017] The base may have at least a partial shape of revolution around an axis. The axis of the base is, for example, intended to coincide with the axis of rotation of the motor in the assembled state of the motor-fan unit.

[0018] The projection may extend radially relative to the axis of the base.

[0019] The internal structure may have an annular shape, and the projection may extend from an outer wall of the annular shape.

[0020] The internal structure may be in the center or substantially in the center of the engine mount.

[0021] The air inlet and air outlet can be diametrically opposite.

[0022] According to another aspect, the cooling channel may have a depth along the axis of the base, decreasing between the air inlet and the air outlet. This difference in depth makes it possible to generate a venturi effect and makes it possible to improve the flow of the air flow.

[0023] The depth of the cooling channel decreases continuously, for example.

[0024] The base may have a bottom wall and a front wall opposite each other along the axis of the base. The bottom wall and the front wall may delimit the cooling channel.

[0025] The depth between the back wall and the front wall at the air inlet is greater than the depth at the air outlet. The back wall thus forms an inclined plane relative to the plane defined by the front wall.

[0026] According to another aspect of the invention, the base comprises at least one rib extending from a side of the base opposite the cooling channel and arranged at least partly opposite the air outlet. This makes it possible to guide the air flow towards the engine, and the fan wheel, without generating turbulence.

[0027] According to a particular example, the base comprises a material bridge connecting the internal structure to the front wall. The rib may extend from the material bridge, in particular towards the engine, passing through the middle or substantially the middle of the air outlet, so that the cooling channel opens on either side of the rib.

[0028] The rib may have a refined shape.

[0029] The rib may have two concave surfaces extending on either side from one end, for example rounded on the side opposite the bridge of material.

[0030] According to yet another aspect of the invention, at least one orifice is provided in the bottom wall of the base.

[0031] The base may have at least one assembly element, such as a boss, extending from a bottom wall of the base.

[0032] At least one hole may be provided in a wall, for example the bottom wall, of the base.

[0033] At least one orifice may be arranged near the assembly element.

[0034] For example, at least two orifices are provided on either side of an assembly element. The orifice or orifices near an assembly element make it possible to limit the turbulence that can be generated by these assembly elements.

[0035] The assembly elements and associated orifices next to the assembly elements may be located at the outer periphery of the cooling channel, i.e. opposite the internal structure.

[0036] At least one orifice may be provided in the wall, for example the bottom wall, of the base, near the air outlet. The orifice is for example arranged at a distance less than or equal to 20mm from the air outlet. Such an orifice makes it possible to change and in particular to reduce the speed of the air flow.

[0037] Furthermore, the motor mount may include a heat sink attached to the base extending opposite the cooling channel.

[0038] The heat sink comprises for example a housing extending from a first side of the heat sink, mounted in the internal structure of the base and configured to receive an element of the engine, and on a second side opposite the first side, a location configured to receive the control module.

[0039] The invention also relates to a motor-fan unit for a heating, ventilation and / or air conditioning installation of a vehicle, in particular a motor vehicle, comprising a fan wheel, a motor for driving the fan wheel, and a motor support as defined above.

[0040] The drive motor is notably a brushless motor.

[0041] Other advantages and characteristics of the invention will appear more clearly on reading the following description given by way of illustrative and non-limiting example, and the appended drawings among which:

[0042] [Fig. 1] shows an example of an embodiment of a motor-fan unit according to the invention.

[0043] [Fig. 2a] is a perspective view of an engine support base of the motor-fan unit of Figure 1.

[0044] [Fig. 2b] shows the base of Figure 2a on which is fixed a heat sink intended to carry a control module.

[0045] [Fig. 2c] is another perspective view of the base of Figure 2a.

[0046] [Fig. 3] is an enlarged view at a projection opposite an air inlet formed in the base.

[0047] [Fig. 4] is a perspective and bottom view of the base showing a rib at an air outlet formed in the base.

[0048] In these figures, identical elements have the same reference numbers.

[0049] The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to a single embodiment. Single features of different embodiments may also be combined or interchanged to provide other embodiments.

[0050] In the description, certain elements may be indexed, for example first element or second element. In this case, it is a simple indexing to differentiate and name close but not identical elements. This indexing does not imply a priority of one element over another and such names can easily be interchanged without departing from the scope of the present invention.

[0051] Figure 1 illustrates a side view of a motor-fan unit 1, also called a blower, in particular for a heating, ventilation and / or air conditioning installation (not shown) for a vehicle.

[0052] Conventionally, such an installation for a vehicle, particularly a motor vehicle, comprises at least one ventilation duct or circuit, and means for heating and / or means for cooling the air set in motion. The motor-fan unit 1 is arranged within the installation so as to set in motion and circulate the air in the duct of the installation in order to be distributed in the passenger compartment of the vehicle. The motor-fan unit 1 is generally intended to be mounted on a housing of the installation (not visible in the figures).

[0053] The motor-fan unit 1 (or ventilation device) comprises in particular a fan wheel 3, an electric motor 5, and a support 7 for the motor 5, hereinafter called the motor support 7. The invention relates in particular to the motor support 7 described in more detail hereinafter.

[0054] The fan wheel 3 is intended to be driven in rotation around an axis A of rotation, so as to ensure the movement of the air. The fan wheel 3 may have a substantially cylindrical general shape comprising blades or fins.

[0055] The motor 5 is intended to drive the fan wheel 3 in rotation. It may in particular be a brushless motor 5 (also known by the English name “brushless”).

[0056] The motor 5 comprises a fixed stator part and a rotor (not visible in the figures), the rotor being movable relative to the stator part and capable of driving the fan wheel 3. The rotor is for example an external rotor. The rotor may have a cup shape fixed to a motor shaft. The fan wheel 3 may be fixed directly to the motor shaft. The motor 5 and the fan wheel 3 are for example coaxial.

[0057] The rotor and the stator part may carry electromagnetic elements whose interaction generates the displacement of the rotor relative to the stator part, and the displacement of the fan wheel 3. In particular, the rotor may comprise magnets, for example fixed on an internal face of the cup. The stator part may be internal, that is to say arranged inside the rotor. The stator part comprises a stator and, for example, stator windings. The magnets of the rotor may be arranged radially outside relative to the stator windings. The term radially is understood relative to the axis A of rotation.

[0058] Furthermore, the motor 5 is intended to be controlled by a control module 13. The control module 13 generally comprises an electronic card (not visible in the figures) having a control circuit such as a printed circuit and supporting a set of electronic components for controlling the motor 5. The control module 13 may comprise a predetermined number of terminals (not visible) configured to be connected to the motor 5 to power, for example, the stator windings. The control module 13 may also comprise at least one connector electrically connected to the electronic card, in particular a control signal to the control circuit and / or to supply energy for the electrical power supply of the motor 5, when it is connected to an electrical harness, for example of the vehicle. Thus, the stator windings can create a magnetic field driving the rotation of the rotor and consequently of the fan wheel 3.

[0059] The motor support 7 can carry the control module 13 of the motor 5. In particular, the control module 13 can be carried by a support part forming for example a heat sink 15 and fixed on the motor support 7. The heat sink 15 is advantageously made of aluminum. For example, the heat sink 15 can have a recess defining a location for receiving the control module 13. The recess can be surrounded by a projecting rim. Finally, a cover 17 can be fixed on the motor support 7, in particular on the heat sink 15, so as to cover the control module 13. As illustrated in FIG. 1, the control module 13 is masked by this cover 17. The fixing can be implemented by any suitable means, for example in a non-limiting manner by screwing. The cover 17 thus defines with the recess on the heat sink 15, a housing for receiving the control module 13.

[0060] The engine support 7 is intended to allow the motor-fan unit 1 to be fixed to a structure in the vehicle, such as an installation box.

[0061] The engine support 7 comprises a base 70, visible in figures 2a to 2c. The base 70 may have at least a partial shape of revolution around an axis coinciding, for example, with the axis A of rotation of the fan wheel in the assembled state of the motor-fan unit. The base 70 may be centered around this axis A. The axis A hereinafter designates both the axis of the base 70 and the axis of rotation of the fan wheel / motor.

[0062] The base 70 can extend mainly along a plane normal to the axis A.

[0063] In addition, the base 70 may have a first face or upper face (visible in FIG. 2a) and a second face or lower face opposite the first face. The first face may be intended to carry the control module, while the second face may be intended to be arranged on the fan wheel side.

[0064] The base 70 comprises an internal structure 71 configured for fixing the motor 5. For example, the internal structure 71 has an annular shape.

[0065] The internal structure 71 may be in the center or substantially in the center of the engine support 7, in the center of the base 70. In the example illustrated, the internal structure 71 delimits a central orifice 72.

[0066] The base 70 may in particular comprise two rings, an internal ring 7A and an external ring 7B.

[0067] At least one decoupling material, for example in the form of a decoupling ring 9, may be interposed between the inner ring 7A and the outer ring 7B. It may be an elastomeric material connecting the rings 7A, 7B together. The elastomeric material is for example polystyrene-b-poly(ethylene-butylene)-b-polystyrene or SEBS. Alternatively, it could be silicone. The decoupling material helps limit the transmission of vibrations generated by the engine and / or fan wheel into the vehicle and / or external stresses to the engine and / or fan wheel.

[0068] The internal structure 71 is for example a central structure of the internal ring 7A.

[0069] The two rings 7A, 7B may be coaxial. The outer ring 7B has a side wall, for example cylindrical. The inner ring 7A has a side wall, for example cylindrical, connecting a bottom wall 7C and a front wall 7D opposite along the axis A. The front wall 7D defines for example an annular rim of the inner ring 7A on the side opposite the bottom wall 7C along the axis A of the base 70.

[0070] The inner ring 7A may be intended to be fixed to the motor, in particular to the stator. The heat sink 15 may be fixed to at least one of the rings, for example to the inner ring 7A. In particular, the heat sink 15 may be arranged opposite the bottom wall 7C of the inner ring 7A by bearing on the front wall 7D. The heat sink 15 may define a housing 16 mounted in the internal structure 71 of the base 70. The housing 16 is intended to receive an element of the motor and extends from a first side of the heat sink 15. The location for receiving the control module is provided on a second side of the heat sink 15 opposite the first side and opposite the base 70.

[0071] The outer ring 7B may be intended to be fixed, directly or indirectly, to the structure in the vehicle, such as the housing of the installation. In the example illustrated in FIG. 1, the engine support 7 comprises a peripheral air deflector 11 to which the outer ring is fixed. The base may be received in a cavity of such a deflector 11. The air deflector 11 may be intended to be fixed to the structure in the vehicle, such as the housing of the installation. When the engine mount 7 and the fan wheel 3 are assembled, the air deflector 11 forms an interface between the engine mount 7 and the fan wheel 3. The air deflector 71 makes it possible, during operation of the motor-fan unit 1, to deflect at least a portion of the air set in motion by the fan wheel 5 towards the control module 7 and / or towards the engine 5.

[0072] Referring again to Figures 2a to 2c, the base 70 further comprises at least one cooling channel 73. This cooling channel 73 is arranged around the internal structure 71.

[0073] The cooling channel 73 may be provided in the thickness of the base 70, thus forming a recess in the base 70, for example in the internal ring 7A.

[0074] An air flow F for cooling the engine and / or the control module is intended to circulate in the cooling channel 73. For this purpose, the cooling channel 73 has at least one air inlet 74 and at least one air outlet 75 between which the air flow F can circulate. The air inlet 74 and the air outlet 75 can be diametrically opposite.

[0075] The air inlet 74 can be produced by at least one opening provided in the side wall of the outer ring 7B.

[0076] The air outlet 75 can be produced by at least one opening provided in the base 70, for example in the bottom wall 7C. According to a particular example, the base 70 comprises a bridge of material 7', opposite and in particular above the air outlet 75 with reference to the orientation of FIG. 2a, which connects the internal structure 71 to the front wall 7D of the internal ring 7A.

[0077] The internal structure 71 may have a projection 76 arranged opposite the air inlet 74. This projection 76 extends from the internal structure 71 towards the air inlet 74. In particular, when the internal structure 71 has an annular shape, the projection 76 may extend from an external wall of the annular shape. In particular, the projection 76 extends radially relative to the axis A.

[0078] The projection 76 may have two opposite flanks, so that the air flow F coming from the air inlet 74 is separated into at least two fractions intended to circulate in the cooling channel 73. Each fraction of air flow F may follow a flow circuit distinct from the other fraction of air flow F.

[0079] The projection 76 may have an end 77, for example rounded, arranged opposite a median or substantially median zone of the air inlet 74. Thus, the two air flow fractions F may be in equal or substantially equal proportions.

[0080] The projection 76 may have an evolving shape. For example, the projection 76 has a shape that tapers towards the air inlet 74. The end 77 of the projection 76 is therefore tapered relative to the rest of the projection 76.

[0081] Referring also to Figure 3, the projection 76 has for example two concave surfaces 78 extending on either side of the end 77 of the projection 76. The concavity of these surfaces 78 is oriented towards the cooling channel 73. In other words, the sides of the projection 76 can be curved, rounded.

[0082] Each concave (or tapered) surface 78 may describe an arc of a circle of at least 5°. As a particular and non-limiting example, the concave surface 78 may extend over a distance of at least 10 mm.

[0083] Such concave surfaces 78 make it possible to reduce the speed of the air flow F at the inlet and make it possible to guide the air flow F towards the inside of the cooling channel 73 without creating turbulence, which thus facilitates the flow of the air flow fractions F on either side of the projection 76.

[0084] In the illustrated example, the projection 76 defines a general teardrop shape or approaching the shape of a teardrop.

[0085] The cooling channel 73 has a depth, along the axis A of the base 73, which advantageously decreases between the air inlet 74 and the air outlet 75. The depth of the cooling channel 73 decreases, for example, continuously.

[0086] In particular, the base 70 can define a bottom wall and a front wall opposite along the axis A of the base 70, delimiting the cooling channel 73. This is for example the bottom wall 7C and the front wall 7D of the internal ring 7A of the base 70.

[0087] In this case, the depth or height between the bottom wall 7C and the front wall 7D varies, in particular decreases, between the air inlet 74 and the air outlet 75. The depth hl at the air inlet 74 is greater than the depth h2 at the air outlet 75. The bottom wall 7C thus forms a plane inclined relative to the plane defined by the front wall 7D. This difference in depth generates a venturi effect and makes it possible to improve the flow of the air flow F.

[0088] Furthermore, the base 70 may comprise at least one rib 79, shown in FIG. 4. This rib 79 extends from one side of the base 70 opposite the cooling channel 73. The rib 79 may in particular extend from the bridge of material connecting the internal structure to the front wall of the internal ring.

[0089] The rib 79 is arranged at least partly opposite the air outlet 75. Thus, the cooling channel opens at the level of the rib 79. In particular, the rib 79 can pass through the middle or substantially the middle of the air outlet 75, so that the cooling channel opens on either side of the rib 75.

[0090] The rib 79 extends, for example, in a main extension direction normal to the plane defined by the bottom wall of the inner ring. The rib 79 may extend mainly along the axis A.

[0091] The rib 79 may have a refined shape. This shape may possibly be similar to the shape of the projection opposite the air inlet, previously described. For example, the rib 79 may have two concave surfaces 80 extending on either side of an end, for example rounded on the side opposite the bridge of material. Such surfaces 80 act as flow guide surfaces for the air flow F.

[0092] In the assembled state of the motor-fan unit, the rib 79 extends in particular in the direction of the motor. The air flow leaving the cooling channel can thus be guided towards the motor and the wheel, i.e. downwards with reference to the orientation of the elements in FIGS. 1 and 4, without generating turbulence.

[0093] Furthermore, in operation, the appearance of turbulence zones has been observed during the flow of the air flow in the cooling channel. Referring again to FIGS. 2a, 2b, the base 70 may have at least one assembly element 19, for example at least one boss, extending from the bottom wall 7C of the base 70. The boss(es) are for example provided for the assembly of the base 70 with another part of the engine support 7, such as the heat sink 15. Such bosses can generate at least some of the turbulence zones for the air flow F.

[0094] At least one orifice 21, 23 is advantageously provided in a wall of the base 70, for example the bottom wall 7C.

[0095] One or more orifices, hereinafter called first orifices 21, are provided so as to limit turbulence. They are advantageously placed according to the zones of turbulence. The orifices 21 can be placed at best in the center of the vortex or at a distance less than or equal to 5 mm from the center of the vortex.

[0096] For example, at least one first orifice 21 is provided near the assembly element 19 such as the boss.

[0097] In the illustrated example, at least two first orifices 21 are provided around the assembly element 19. The two first orifices 21 can be arranged symmetrically on either side of the assembly element 19.

[0098] The assembly elements 19 such as the bosses and the associated first orifices 21 may be located on the external periphery of the cooling channel 73, that is to say opposite the internal structure 71.

[0099] In addition or as an alternative, at least one orifice 23 may be provided in a wall of the base 70, for example the bottom wall 7C of the base 70, near the air outlet 75. In order to differentiate it from the first orifices 21 previously described, this orifice is hereinafter called the second orifice 23. Such a second orifice 23 may possibly be provided in the absence of first orifices 21. The second orifice 23 makes it possible to change and in particular to reduce the speed of the air flow F.

[0100] In the illustrated example, at least two second orifices 23 are provided near the air outlet 75. The two second orifices 23 can be arranged symmetrically on either side of the air outlet 75.

[0101] The second orifice(s) 23 may be placed at most 20 mm from the air outlet 75. They may be placed on the external / internal periphery of the cooling channel 73 or in the center in order to best assist in guiding the air flow F.

[0102] Thus, the engine support 7 as described previously makes it possible to improve the overall cooling performance, in particular of the control module 13 and / or the engine 5.

[0103] Indeed, the base 70 defines a specific air channel 73 for the cooling function and the projection 76 at the inlet makes it possible to separate the air flow F intended to circulate in this channel. This projection 76 makes it possible to generate turbulence and to increase the speed of the air flow F. This can ensure that the fractions of the air flow F in inlet come to hit the external edge delimiting the cooling channel 73 before being brought back to the middle and towards the inside.

[0104] In addition, the inclined bottom of the cooling channel 73 makes it possible to improve the flow of the air flow F from the air inlet 74 to the air outlet 75.

[0105] One or more first and / or second orifices 21, 23 provided in the bottom of the base 70 make it possible to limit turbulence and / or slow down the air flow F.

[0106] Finally, the sides of the rib 79 opposite the cooling channel 73 make it possible to better guide the air flow F towards the engine 5.

Claims

Claims

1. Engine mount (7) for a motor (5) for driving a fan wheel (3), in particular a motor-fan unit (1) of a heating, ventilation and / or air conditioning installation of a motor vehicle, the engine mount (7) comprising a base (70): comprising an internal structure (71) configured for fixing the engine (5), and defining a cooling channel (73) around the internal structure (71), and in which an air flow (F) is intended to circulate for cooling the engine (5) and / or a control module (13) of the engine (5) intended to be fixed to the engine mount (7), the cooling channel (73) having at least one air inlet (74) and at least one air outlet (75), characterized in that the internal structure (71) has a projection (76) arranged opposite the air inlet (74), the projection (76) extending from the internal structure (71) towards the air inlet (74),so as to divide the air flow (F) intended to come from the air inlet (74) and to circulate in the cooling channel (73).,

2. Engine mount (7) according to the preceding claim, in which the projection (76) has a shape that tapers towards the air inlet (74).

3. Engine mount (7) according to the preceding claim, in which the projection (76) has two concave surfaces (78) extending on either side of one end (77) of the projection (76).

4. Engine support (7) according to one of the preceding claims, in which the base (70) has a shape of revolution around an axis (A), and the projection (76) extends radially relative to the axis (A).

5. Engine support (7) according to the preceding claim, in which the cooling channel (73) has a depth (hl-h2), along the axis (A) of the base (70), decreasing between the air inlet (74) and the air outlet (75).

6. Engine mount (7) according to one of the preceding claims, in which the base (70) comprises at least one rib (79) extending from a side of the base opposite the cooling channel (73) and arranged at least partly opposite the air outlet (75).

7. Engine support (7) according to one of the preceding claims, in which at least one orifice (21, 23) is provided in a wall (7C) of the base (70).

8. Engine mount (7) according to the preceding claim, in which at least one orifice (23) is arranged at a distance less than or equal to 20 mm from the air outlet (75).

9. Engine support (7) according to one of the preceding claims, comprising a heat sink (15) fixed to the base (70) extending opposite the cooling channel (73), the heat sink (15) comprising: a housing (16) extending from a first side of the heat sink (15), mounted in the internal structure (71) of the base (70) and configured to receive an element of the engine (5), and on a second side opposite the first side, a location configured to receive the control module (13).

10. Motor-fan unit of a heating, ventilation and / or air conditioning installation of a vehicle, in particular a motor vehicle, comprising: a fan wheel, a motor for driving the fan wheel, characterized in that it comprises a motor support (7) according to one of the preceding claims.

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