Engine support and corresponding air flow generator of a heating, ventilation and / or air conditioning installation of a vehicle, in particular an automobile

Abstract

Engine mount (22) for an air flow generator (1) of a heating, ventilation and / or air conditioning device of a motor vehicle, the engine mount (22) comprising:- a first face (22a) configured for fixing a stator (24), and- a second face (22b), opposite the first face (22a), comprising a cooling channel (73) in which an air flow is intended to circulate, said cooling channel (73) bypassing the internal structure (221), the cooling channel (73) having at least one air inlet (74) and at least one air outlet (75), the air inlet (74) comprising a first orifice (225) formed in the engine mount (22), the engine mount (22) further comprising an elastomer end piece (25) arranged at the end of the first orifice (225) opposite the cooling channel (73), said elastomer end piece (25) bordering said first orifice (225). Abstract figure: Fig 5

Description

Title of the invention: Engine support and corresponding air flow generator for a heating, ventilation and / or air conditioning installation of a vehicle, in particular an automobile

[0001] The present invention relates to the field of heating, ventilation and / or air conditioning installations for vehicles, in particular motor vehicles. The invention relates more particularly to a motor support for a fan wheel, in particular of an air flow generator. The invention also relates to an air flow generator 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 makes it possible to create an air flow in the passenger compartment. Such an installation also makes it possible to manage the temperature and distribution of the air flow 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 installation by means of a motor support which comprises a base with an internal structure allowing the fixing of the electric motor, more precisely of the stator.

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

[0006] For this purpose, it is known to exploit the air flow circulating inside the heating, ventilation and / or air conditioning installation. To do this, a fraction of the air flow generated by the air flow generator is taken and conveyed to the engine support. Thus, the base of the engine support comprises at least one cooling channel for channeling the taken air flow. The cooling channel is generally shaped to guide the taken air flow towards the engine or the control module.

[0007] A constant objective is to optimize the cooling performance of the engine or the control module, and to increase the aeraulic performance of the air flow generator. Furthermore, the implementation of the cooling channel must not hinder easy mounting of the air flow generator.

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

[0009] For this purpose, the present invention relates to an engine support for an air flow generator of a heating, ventilation and / or air conditioning device of a motor vehicle, the engine support comprising: - a first face configured for fixing a stator, and - a second face, opposite the first face, comprising a cooling channel in which an air flow is intended to circulate for cooling the stator and / or a control module of the air flow generator intended to be fixed to the engine support, said cooling channel bypassing the internal structure, the cooling channel having at least one air inlet and at least one air outlet, the air inlet comprising a first orifice provided in the engine support, the engine support further comprising an elastomer end piece arranged at the end of the first orifice opposite the cooling channel, said elastomer end piece bordering said first orifice.

[0010] According to one aspect of the invention, the elastomer tip is overmolded at the end of the first orifice.

[0011] According to another aspect of the invention, the end of the first orifice comprises a conduit projecting opposite the cooling channel, the elastomer end piece being arranged at the end of said conduit.

[0012] According to another aspect of the invention, the elastomer end piece comprises a hollow body forming a conduit extending the first orifice and a lip extending substantially perpendicular to the axis of elongation of the body around the entire periphery of the end of the body opposite the first orifice.

[0013] According to another aspect of the invention, the first orifice and the body of the elastomer tip have an oblong profile.

[0014] According to another aspect of the invention, the elastomer tip comprises at least one reinforcing rib between the body and the lip.

[0015] According to another aspect of the invention, the lip is concave.

[0016] The present invention also relates to an air flow generator comprising a engine support as described above, said air flow generator comprising a deflector at least partially covering the first face of the engine support, said deflector comprising a second orifice arranged opposite the first orifice of the engine support, the elastomer end piece being compressed between the engine support and the deflector so as to ensure sealed fluid continuity between the first and second orifices.

[0017] According to one aspect of the air flow generator according to the invention, the first face of the motor support comprises a first wall, said first wall projecting towards the portion of the deflector covering said first face, said first wall delimiting an enclosure around the stator, and in that said portion of the deflector comprises a second wall projecting towards the first face of the motor support, an elastomer sealing lip being arranged between said first and second walls.

[0018] According to another aspect of the air flow generator according to the invention, the elastomer lip is overmolded at the end of one of the first or second walls.

[0019] Other characteristics and advantages of the invention will emerge from the following description, given by way of example, without limitation, with reference to the drawings appended below.

[0020] [Fig-1] [Fig.l] shows a schematic representation in exploded perspective of a airflow generator,

[0021] [Fig.2] [Fig.2] shows a schematic perspective representation of the rear of an engine support of an air flow generator,

[0022] [Fig.3] [Fig.3] shows a schematic perspective representation of a canal of cooling of an engine mount,

[0023] [Fig.4] [Fig.4] shows a schematic representation in side view and in section of an engine mount,

[0024] [Fig.5] [Fig.5] shows a schematic perspective representation according to a front view of an elastomer tip,

[0025] [Fig.6] [Fig.6] shows a schematic perspective representation according to a rear view of the elastomer tip of [Fig.5].

[0026] In these figures, identical elements have the same reference numbers.

[0027] 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 and / or interchanged to provide other embodiments.

[0028] In the present description, certain elements or parameters may be indexed, such as first element or second element as well as first parameter and second parameter or even first criterion and second criterion, etc. In this case, it is a simple indexing to differentiate and name elements or parameters or criteria that are close, but not identical. This indexing does not imply a priority of one element, parameter or criterion over another and such names can easily be interchanged without departing from the scope of this description. This indexing also does not imply an order in time, for example, to assess this or that criterion.

[0029] [Fig. 1] illustrates an air flow generator 1 for sucking in and blowing air. The air flow generator 1 comprises a motor unit 2 and an electronic control unit 3 located in the extension of one another along a main longitudinal axis X (illustrated by a dotted line). The electronic control unit 3 is thus positioned to power the motor unit 2 while limiting the magnetic disturbances generated by its own internal elements which will be described later.

[0030] The motor unit 2 consists of a brushless electric motor, also called an electronically commutated electric motor. It is capable of driving a ventilation wheel 28 in rotation via an output shaft 260 of said motor unit 2, extending along said longitudinal axis X.

[0031] The motor unit 2 mainly comprises a stator 24 provided with an excitation winding and a rotor 26, carrying the output shaft 260 capable of driving the ventilation wheel 28. The rotor 26 is arranged around the stator 24 to be driven in rotation under the effect of magnetic fields generated by the winding and the magnets associated with the rotor 26.

[0032] The rotor 26 may in particular comprise a cup 264 symmetrical by rotation about the longitudinal axis X, in the shape of a bell. The rotor 26 also comprises magnets (not shown) fixed to an internal face of the cup 264, in particular on a cylindrical strip of the internal face of the cup 264. The cup 264 of the rotor 26 is fixed, at its center, to the output shaft 260. The output shaft 260 constitutes the output (or rotation) shaft of the electric motor 14, driving the fan wheel 12. For this purpose, the fan wheel 26 is here directly fixed on the output shaft 260.

[0033] The stator 24 may be symmetrical by rotation around the longitudinal axis X. The stator 24 may in particular comprise a barrel 240 extending mainly in the direction of the longitudinal axis X. The cup 264 of the rotor 26 in particular covers one end of the barrel 240 opposite its base (not visible).

[0034] As illustrated in [Fig.l], the barrel 240 comprises in particular a base as well as an internal channel (not visible). The internal channel passes right through the barrel 240 in the direction of the longitudinal axis X. The internal channel may be generally cylindrical. The internal channel may in particular comprise at least one housing intended to receive a bearing ring in which the shaft 260 is inserted. Preferably, two housings are formed in the internal channel of the barrel 240. Each housing is intended to receive a bearing ring, in particular a ball bearing. These housings are more particularly arranged respectively at the ends of the internal channel. The shaft 260 is received in part in the internal channel of the stator 24, free to rotate about the longitudinal axis X relative to the stator 24, by means of the bearing rings. The bearing rings may in particular be held within their respective housing by means of an internal elastic ring such as a circlip.

[0035] The barrel 240 also comprises a plurality of branches extending radially relative to the longitudinal axis X. The branches in particular project from the barrel 240.The barrel 240 and more particularly its branches 31 are made of an electrically non-conductive material, for example plastic. The barrel 240 may in particular be a single piece in that there is continuity of material between the branches and the barrel 240. An alternative not shown may also be that the branches are made on an independent part having an annular central part from which the branches protrude and fixed to the barrel 240. The barrel 240 is for example made by molding, in particular by injection molding.

[0036] A stack of metal sheets is arranged on the branches of the barrel 240. The stator 24 also includes an insulator covering the stack of metal sheets. The stack of metal sheets is thus held and sandwiched between the branches of the barrel 240 and the insulator. The insulator is also made of an electrically non-conductive material.

[0037] The branches form a winding support around which at least one winding 242 is wound. Each winding 242 corresponds to a phase of the electric motor. A three-phase electric motor thus comprises a multiple of three series of windings 242, for example twelve. The windings 242 are made by windings of a metal wire, generally copper, surrounding the branches of the stator 24. These windings are made so as to be in contact only with the branches of the barrel 240 and so as not to be in electrical contact with the stack of metal sheets.

[0038] The stator 24, more particularly the base of the barrel 240, is in particular fixed to a motor support 22, for example by means of screws. This motor support 22 is also made of an electrically non-conductive material. The motor support 22 may also be symmetrical by rotation around the longitudinal axis X and have a central opening above which the barrel 240 is fixed. The rotor 26 and in particular the external edges of the cup 264 may in particular pass directly above said support 16.

[0039] Opposite a first face 22a of the engine support 22 from which the stator 24, a control module 34 is fixed on a second face 22b of the motor support 22, for example by means of screws. The control module 34 comprises in particular a printed circuit, electrical and electronic components in order to control the air flow generator 1 and to ensure the electrical supply of the windings 242 of the stator 24. Each winding 242 is electrically connected to the control module 34 and to their electrical supply.

[0040] As illustrated in Figures 2 and 3, the motor support 22 comprises an internal structure 221. This internal structure 221 is in particular arranged directly above the stator 24 and allows the fixing of said stator 24 on the motor support 22. Within this internal structure 221, the motor support 22 comprises in particular a central orifice through which the shaft 260 passes. Still within the internal structure 221, the second face 22b of the motor support 22 also comprises a circular housing 222 around its central orifice. This housing 222 is in particular intended to receive a bearing arranged at the end of the shaft 260. The internal structure 221 also comprises orifices through which tabs 224 projecting from the stator 24 can pass so as to allow the electrical connection between the windings 242 of the stator 24 with the control module 34 and their electrical power supply.

[0041] Returning to [Fig.l], a metal plate 32 is arranged between the control module 34 and the motor support 22. The metal plate 32 is connected to the electrical ground. The electrical connections of the windings 242 pass through the metal plate 32 without electrical contact through orifices (not shown). This metal plate 32 plays different roles, in particular grounding, heat sink and protection against electromagnetic waves.

[0042] The metal plate 32 and the control module 34 are advantageously covered by a cover 36. When the electronic control unit 3 is assembled, the control module 34, the metal plate 32 and the cover 36 are held together by means of through-fixing means (not shown), for example, screws.

[0043] The air flow generator 1 also comprises a cover or deflector 23 symmetrical by rotation around the longitudinal axis X arranged between the motor support 22 and the external edges of the fan wheel 28. This deflector 23 comprises in particular a central opening 231 through which the stator 24 and the rotor 26 pass.

[0044] In the example illustrated in [Fig.l], the deflector 23 is a single piece and more particularly comprises a so-called internal portion 23a partially covering the first face 22a of the motor support 22 and a second so-called external portion 22b surrounding the edge of the motor support 22. The internal portion 23a of the deflector 23 comprises in particular the orifice 231 through which the stator 24 and the rotor 26 pass. deflector 23 can in particular be fixed to the engine support 22 by means of elastic buffers 233. More particularly, these elastic buffers 233 are arranged on the edge of the engine support 22 and the external portion 23b of the deflector 23 is fixed to said elastic buffers 233.

[0045] The deflector 23, more particularly its external portion 23b, is in particular intended to be fixed to a stable structure, for example in a structural housing of a heating, ventilation and / or air conditioning device (not shown) within a motor vehicle.

[0046] The elastic buffers 233 have a shock absorber role in order to absorb the vibrations and relative movements of the engine support 22 and the engine block 2 with respect to the deflector 23. Indeed, the engine block 2 undergoes vibrations linked to the rotation of the rotor 26 and the ventilation wheel 28 with respect to the deflector 23 fixed to a stable structure of the motor vehicle. This thus makes it possible to limit the vibrations on the one hand but also to limit the noise of the air flow generator 1.

[0047] The motor support 22, the stator, 24 the rotor 26 as well as the deflector 23 are coaxial around a longitudinal axis X.

[0048] It is nevertheless entirely possible to imagine other embodiments of the air flow generator 1, in particular in which the deflector 23 is in one piece and secured to the motor support 22 by elastic buffers.

[0049] Referring to Figures 2 and 3, the engine support 22 further comprises at least one cooling channel 73 arranged on the second face 22b of the engine support 22, bypassing the internal structure 221.

[0050] The cooling channel 73 can be arranged in the thickness of the engine support 22, thus forming a recess in the second face 22b of the engine support 22. In the example illustrated in FIGS. 2 and 3, the cooling channel 73 has a general “U” shape and comprises two branches 73a, 73b passing on either side of the internal structure 221. The cooling channel 73 is thus delimited by an internal wall formed by the internal structure 221 on the one hand and on the other hand an external wall projecting from the second face 22b of the engine support 22.

[0051] An air flow for cooling the engine and / or the control module 34 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 can circulate. The air inlet 74 and the air outlet 75 may in particular be arranged at opposite ends of the cooling channel 73.

[0052] As illustrated in [Fig.4], the air inlet 74 is produced by at least one first orifice 225 provided in the engine support 22. More particularly, this first orifice 225 can be provided in the edge of the engine support 22 and open laterally. The air inlet 74 can also extend and pass through the deflector 23. For this, the deflector 23 also comprises a second orifice 235 arranged opposite the first orifice 225. This second orifice 235 can in particular be produced in the external portion 23b of the deflector 23.

[0053] As visible in Figures 4 to 6, the engine support 22 further comprises an elastomer end piece 25 arranged at the end of the first orifice 225 opposite the cooling channel 73. This elastomer end piece 25 borders the first orifice 225 and allows sealed fluid communication between the first orifice 225 of the engine support 22 and the second orifice 235 of the deflector 23. The fact that the fluid communication is sealed makes it possible in particular to avoid air leaks and therefore to limit possible air noise and whistling. This elastomer end piece, due to its elastic nature, also allows vibration absorption.

[0054] The elastomer tip 25 may have a length of between 2.5mm and 4mm, preferably between 3mm and 3.5mm, corresponding in particular to the distance between the engine support 22 and the deflector 23. This length allows good absorption of vibrations between these 2 parts.

[0055] The elastomer end piece 25 is more particularly compressed between the motor support 22 and the deflector 23 so as to ensure a sealed fluid continuity between the first 225 and the second 235 orifice without an additional glue or seal being necessary.

[0056] The elastomer tip 25 may in particular be overmolded at the end of the first orifice 225. The elastomer tip 25 may in particular be made of polystyrene-b-poly(ethylene-butylene)-b-polystyrene (SEBS).

[0057] The end of the first orifice 225 may also comprise a conduit 226 projecting opposite the cooling channel 73. The elastomer end piece 25 is then arranged at the end of said conduit 226.

[0058] The elastomer end piece 25 may more particularly comprise a hollow body 251 forming a conduit extending the first orifice 225 and a lip 252 extending substantially perpendicular to the axis of elongation of the body 251. This lip 252 is in particular continuous and extends over the entire periphery of the end of the body 251 opposite the first orifice 225. This lip 252 in particular makes it possible to have a sufficiently large contact surface with the deflector 23 in order to ensure sealing.

[0059] The lip 252 may for example have a thickness of between 0.5mm and 1.5mm, preferably 1mm. The lip may also have a height of between 2.5mm and 4mm, preferably between 3mm and 3.5mm. This height as well as the thickness of the lip 252 may of course vary depending on the overall size of the air flow generator 1.

[0060] As illustrated in [Fig.5], the first orifice 225 and the body 251 of the elastomer end piece 25 may in particular have an oblong profile.

[0061] The elastomer tip 25 may also comprise at least one reinforcing rib 253 (visible in [Fig. 6]) between the body 251 and the lip 252. In the example illustrated in [Fig. 6], with an oblong elastomer tip 25, the latter comprises three reinforcing ribs 253 on its long edges. The short edges of the oblong elastomer tip 25 may also comprise a reinforcing rib 253 depending on the size of the elastomer tip 25.

[0062] In order to match the shape of the deflector 23 onto which it is compressed and thus have equivalent contact around the entire periphery of the elastomer end piece 25, the lip 252 may in particular be concave.

[0063] Returning to [Fig. 4], the first face 22a of the motor support 22 may further comprise a first wall 227 projecting towards the portion of the deflector 23 covering said first face 22a. This first wall 227 delimits an enclosure around the stator 24. Additionally, this portion of the deflector 23 may comprise a second wall 237 projecting towards the first face 22a of the motor support 22. An elastomer sealing lip 27 is arranged between said first 227 and second 237 walls in order to limit the risks of dust and / or water reaching the electronic control unit 3.

[0064] This elastomer lip 27 may in particular be overmolded at the end of one of the first 227 or second 237 walls. The elastomer lip 27 may be made of polystyrene-b-poly(ethylene-butylene)-b-polystyrene (SEBS). In the example illustrated in [Fig.4], the elastomer lip 27 is made at the end of the first wall 227 of the engine support 22.

[0065] Returning to Figures 2 and 3, the at least one air outlet 75 of the cooling channel 73 can be produced by at least one opening provided in the engine support 22 and opening onto the first face 23a. The air flow F is thus expelled between the deflector 23 and the first face 22a of the engine support 22.

[0066] The cooling channel 73 is further covered by the metal plate 32 in a sealed manner so that the air flow only circulates between the at least one air inlet 74 and the at least one air outlet 75.

[0067] In the example illustrated in Figures 2 and 3, the cooling channel 73 thus comprises an air inlet 74 arranged on the base of the “U” and an air outlet 75 at the end of each of the branches 73a, 73b.

[0068] As illustrated in Figures 2 and 3, the internal structure 221 may have a projection 76 arranged opposite the air inlet 74. This projection 76 extends from the internal structure 221 in the direction of the air inlet 74. In particular, the projection 76 extends radially relative to the longitudinal axis X.

[0069] The projection 76 may have two opposite sides, so that the air flow F coming from the air inlet 74 is separated into at least two fractions intended to circulate in each branch 73a, 73b of the cooling channel 73. Each fraction of air flow can thus follow a flow circuit distinct from the other fraction of air flow.

[0070] 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 distributed in the two branches 73a, 73b in equal or substantially equal proportions.

[0071] 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.

[0072] Also referring to [Fig. 3], the projection 76 has for example two lateral surfaces 78 extending on either side of the end 77 of the projection 76 and each oriented towards a branch 73a, 73b of the cooling channel 73. These lateral surfaces 78 may in particular be concave. The concavity of these surfaces 78 is oriented towards the branch 73a, 73b of the cooling channel 73 towards which it is oriented. In other words, the sides of the projection 76 may be curved, rounded.

[0073] Each concave (or tapered) lateral surface 78 may describe an arc of a circle of at least 5°. As a particular and non-limiting example, the concave lateral surface 78 may extend over a distance of at least 10 mm.

[0074] Such lateral surfaces 78 make it possible to reduce the speed of the inlet air flow and make it possible to guide the air flow 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.

[0075] In the example illustrated in Figures 2 and 3, the projection 76 defines a general shape of a water drop or approaching the shape of a water drop.

[0076] 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.

[0077] In this case, the depth of the recess forming the cooling channel 73 varies, in particular decreases, between the air inlet 74 and the air outlet 75. The depth at the air inlet 74 is greater than the depth at the air outlet 75. The bottom of the cooling channel 73 thus forms a plane inclined relative to the plane defined by the engine support 22. This difference in depth generates a venturi effect and makes it possible to improve the flow of the air flow F.

[0078] Furthermore, in operation, the appearance of turbulence zones has been observed during the flow of the air flow in the cooling channel 73. Referring again to FIGS. 2 and 3, the engine support 22 may have at least one assembly element 19, for example at least one boss, extending from the bottom wall of the engine support 22. The boss(es) are for example provided for the assembly of the engine support 22 with another part of the air flow generator 1, such as the metal plate 32. Such bosses can generate at least some of the turbulence zones for the air flow F.

[0079] At least one orifice 71, 72 is advantageously provided in the bottom of the cooling channel 73 so as to pass through and to open onto the first face 22a of the engine support 22.

[0080] One or more orifices, hereinafter called first orifices 71, are provided so as to limit turbulence. They are advantageously placed according to the turbulence zones. The orifices 71 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. For example, at least one first orifice 71 is provided near the assembly element 19 such as the boss.

[0081] In the illustrated example, at least two first orifices 71 are provided around the assembly element 19. The two first orifices 71 can be arranged symmetrically on either side of the assembly element 19.

[0082] The assembly elements 19 such as the bosses and the first associated orifices 71 may be located on the external periphery of the cooling channel 73, that is to say opposite the internal structure 221.

[0083] In addition or as an alternative, at least one orifice 72 may be provided in the bottom of the cooling channel 73, close to the air outlet 75. In order to differentiate it from the first orifices 71 previously described, this orifice is hereinafter called the second orifice 72. Such a second orifice 72 may possibly be provided in the absence of first orifices 71. The second orifice 72 makes it possible to change and in particular to reduce the speed of the air flow passing through the cooling channel 73.

[0084] The second orifice(s) 72 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.

[0085] Thus, the motor support 22 as described previously makes it possible to improve the overall cooling performance, in particular of the metal plate 32 and therefore of the control module 34 and the electrical power supply.

[0086] Indeed, the engine support 22 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. 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.

Claims

Claims

1. Engine mount (22) for an air flow generator (1) of a heating, ventilation and / or air conditioning device of a motor vehicle, the engine mount (22) comprising: - a first face (22a) configured for fixing a stator (24), and - a second face (22b), opposite the first face (22a), comprising a cooling channel (73) in which an air flow is intended to circulate for cooling the stator (24) and / or a control module (34) of the air flow generator (1) intended to be fixed to the engine mount (22), said cooling channel (73) bypassing the internal structure (221), the cooling channel (73) having at least one air inlet (74) and at least one air outlet (75), the air inlet (74) comprising a first orifice (225) formed in the engine mount (22),characterized in that the engine support (22) further comprises an elastomer end piece (25) arranged at the end of the first orifice (225) opposite the cooling channel (73), said elastomer end piece (25) bordering said first orifice (225).,

2. Motor support (22) for air flow generator (1) according to the preceding claim, characterized in that the elastomer end piece (25) is overmolded at the end of the first orifice (225).

3. Motor support (22) for air flow generator (1) according to any one of the preceding claims, characterized in that the end of the first orifice (225) comprises a conduit (226) projecting opposite the cooling channel (73), the elastomer end piece (25) being arranged at the end of said conduit (226).

4. Motor support (22) for air flow generator (1) according to any one of the preceding claims, characterized in that the elastomer end piece (25) comprises a hollow body (251) forming a conduit extending the first orifice (225) and a lip (252) extending substantially perpendicular to the axis of elongation of the body (251) around the entire periphery of the end of the body (251) opposite the first orifice (225).

5. Motor support (22) for air flow generator (1) according to the preceding claim, characterized in that the first orifice (225) and the body (251) of the elastomer end piece (25) have an oblong profile.

6. Motor support (22) for air flow generator (1) according to any one of claims 4 or 5, characterized in that the elastomer end piece (25) comprises at least one reinforcing rib (253) between the body (251) and the lip (252).

7. Motor support (22) for air flow generator (1) according to any one of claims 4 to 6, characterized in that the lip (252) is concave.

8. Air flow generator (1) comprising a motor support (22) according to any one of the preceding claims, said air flow generator (1) comprising a deflector (23) at least partially covering the first face (22a) of the motor support (22), said deflector (23) comprising a second orifice (235) arranged opposite the first orifice (225) of the motor support (22), the elastomer end piece (25) being compressed between the motor support (22) and the deflector (23) so as to ensure sealed fluid continuity between the first (225) and the second (235) orifice.

9. Air flow generator (1) according to the preceding claim, characterized in that the first face (22a) of the motor support (22) comprises a first wall (227), said first wall (227) projecting towards the portion of the deflector (23) covering said first face (22a), said first wall (227) delimiting an enclosure around the stator (24), and in that said portion of the deflector (23) comprises a second wall (237) projecting towards the first face (22a) of the motor support (22), an elastomeric sealing lip (27) being arranged between said first (227) and second (237) walls.

10. Air flow generator (1) according to the preceding claim, characterized in that the elastomer lip (27) is overmolded at the end of one of the first (227) or second (237) walls.

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