Thermal regulation device, particularly for motor vehicles

Abstract

Thermal regulation device, in particular for a motor vehicle The invention relates to a device (1) for thermal regulation of a predefined number of components (7), comprising a housing comprising at least one compartment (4) for receiving at least one component (7) and delimited at least by a housing bottom (35), and a dielectric fluid circuit comprising at least one dielectric fluid circulation channel opening onto the at least one compartment (4), so as to spray and / or immerse at least in part the at least one component (7) received in the compartment (4). The housing bottom (35) comprises at least one drain orifice (15) associated with the at least one compartment (4) so as to allow draining by gravity, the drain orifice (15) being removably closed by a plug (17). Figure for the abstract: Fig. 2

Description

Title of the invention: Thermal regulation device, in particular for a motor vehicle

[0001] The present invention relates to a thermal regulation device, in particular in the automotive field. Such a device is generally intended to receive a plurality of electrical and / or electronic components likely to release heat during their operation.

[0002] The components that may be concerned by the present invention may be electrical energy storage elements, in particular battery elements, or power electronics, for example, but not limited to, semiconductors, such as diodes or transistors. They could also be computer server components.

[0003] The invention finds an advantageous application in the field of thermal regulation of a power electronics device or module, i.e. comprising power electronic components. In operation, the temperature of such a power electronics device or module may rise, which risks damaging some of the power electronic components.

[0004] The invention also finds an advantageous application in the field of thermal regulation of electrical energy storage elements, such as battery cells or a battery pack, for example for a motor vehicle with an electric and / or hybrid engine. The electrical energy of vehicles with an electric and / or hybrid engine is supplied by one or more batteries. During their operation, the electrical energy storage elements such as the batteries are caused to heat up and thus risk being damaged. In particular, a charging technique, called rapid charging, consists of charging the energy storage elements under a high voltage and a high amperage, in a short time, in particular in a maximum time of around twenty minutes. This rapid charging involves significant heating of the electrical energy storage elements which must be treated.

[0005] In the field of motor vehicles, it is known to use a thermal regulation device, in particular for cooling, components for example for storing electrical energy, such as batteries. Such a thermal regulation device makes it possible to modify a temperature of an electrical energy storage device, for example when starting the vehicle in cold weather, by increasing its temperature for example, or whether during driving or during a recharging operation of said system, by reducing the temperature of the battery elements, which tend to heat up during their use.

[0006] According to a known solution, a cold plate inside which a cooling fluid circulates is arranged in contact with the components to be cooled. However, it has been found that such an arrangement can lead to non-uniform cooling of the components of the same device, for example for storing electrical energy, to be cooled, thus leading to a reduction in overall performance.

[0007] According to another known thermal regulation solution, the components received in a housing can be sprayed with a dielectric fluid and / or immersed at least in part in the dielectric fluid, by means of a dielectric fluid circuit comprising channels in which the dielectric fluid can flow as well as orifices or nozzles for spraying the dielectric fluid. A heat exchange can then take place between the components sprayed or immersed in the dielectric fluid. According to this solution, it is advantageous to maintain a minimum level of dielectric fluid in the bottom of the housing in order to constantly immerse at least in part the components received in this housing.

[0008] The housing may define several compartments in which the components may be arranged. In order to limit the volume of dielectric fluid required for thermal regulation of the components throughout the housing, the compartments may be supplied with dielectric fluid independently of one another. The different compartments may open onto a common discharge channel allowing the dielectric fluid to leave the thermal regulation device. The circulation of the dielectric fluid in the dielectric fluid circuit may be carried out by means of at least one pump.

[0009] The components being in direct contact with the dielectric fluid, after heat exchange between the components and the dielectric fluid, it may be necessary to empty simply and quickly at least one compartment receiving components.

[0010] Furthermore, under operating conditions, for example when the motor vehicle is in motion, the thermal regulation device installed in this vehicle may be inclined relative to the horizontal, and in particular in the event of prolonged inclination, dielectric fluid may accumulate in the lowest compartments along the vertical axis of the vehicle, for example via the common discharge channel, while the highest compartments dry out. This results in thermal regulation, for example cooling, which is not uniform in the different compartments, leading to an imbalance in the temperatures of the components. The poorly or not watered / immersed areas of the components may lead to local overheating, thus causing a risk of fire.

[0011] In addition, depending on the inclination, one or more channels of the fluid circuit di The electric motor can partially empty, depriming the pump, so that the circulation of the dielectric fluid is stopped and consequently the thermal regulation.

[0012] The present invention aims to at least partially overcome one or more of the aforementioned drawbacks by proposing a thermal regulation device allowing homogeneous thermal contact of the components with the dielectric fluid, to avoid an imbalance in the thermal regulation, such as the cooling, of the components, whatever the installation of the device to be thermally regulated, in particular even when the thermal regulation device is tilted relative to the horizontal.

[0013] For this purpose, the invention relates to a device for thermal regulation of a predefined number of electronic and / or electrical components, in particular for a motor vehicle, said device comprising a housing comprising at least one compartment configured to receive at least one electronic and / or electrical component, the at least one compartment being delimited at least by a housing bottom, and a dielectric fluid circuit comprising at least one channel for circulation of the dielectric fluid opening onto the at least one compartment, so as to spray and / or immerse at least in part the at least one electronic and / or electrical component with dielectric fluid when it is received in the compartment.

[0014] According to the invention, the housing bottom comprises at least one drain orifice associated with the at least one compartment so as to allow draining by gravity, the drain orifice being removably closed by a plug.

[0015] Thus, at least partial emptying can be carried out in a simple manner, for a given compartment or each compartment individually from one another.

[0016] The thermal regulation device may further comprise one or more of the following characteristics described below, taken separately or in combination.

[0017] The plug may comprise a non-return member arranged so as to allow the flow of the dielectric fluid in a first direction, and to block the flow of the dielectric fluid in a second opposite direction.

[0018] By implanting for a respective compartment, a non-return member in the plug closing a drain orifice, a minimum of dielectric fluid can be kept in all the compartments and channels of the dielectric fluid circuit. Indeed, this non-return member makes it possible in particular to prevent the dielectric fluid from unintentionally pouring into another compartment while allowing the circulation of the dielectric fluid for example towards the pump for evacuation outside the thermal regulation device.

[0019] The non-return member can be removably mounted on the cap.

[0020] The case back may include a support configured to carry the number predefined arrangement of electronic and / or electrical components, assembled to a closing wall, delimiting at least one channel for collecting the dielectric fluid between the support and the closing wall.

[0021] The plug comprising the non-return member can be arranged in the collection channel.

[0022] The non-return member may comprise at least one movable element, for example pivoting.

[0023] The non-return member may comprise a flap configured to be pivotally moved by the flow of the dielectric fluid in the first direction from a position for closing the collection channel to a position for releasing the collection channel.

[0024] The flap of the non-return member extends, for example, mainly in a longitudinal direction.

[0025] The flap of the non-return member may comprise at least one rib extending transversely to the longitudinal direction of the flap.

[0026] According to one example, the shutter has a slope inclined relative to the support and descending towards the closing wall, when the shutter is in the closed position.

[0027] The stopper may comprise a holding structure cooperating by complementarity of shape with a base of the non-return member.

[0028] The base of the non-return member may be sandwiched between the holding structure and the support.

[0029] The base of the non-return member comprises, for example, a lip compressed against the support.

[0030] The cap may include a seal disposed around the holding structure.

[0031] The invention may also relate to a battery pack forming a thermal regulation assembly as defined previously. The battery pack may comprise a predefined number of modules / rows of several cells connected together.

[0032] 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:

[0033] [Fig-1] is a perspective view of a thermal regulation device comprising a box receiving components to be thermally regulated.

[0034] [Fig.2] shows a partial sectional view of the device of [Fig.l].

[0035] [Fig.3] is a sectional view at the level of a fluid distribution crosspiece di electrical of the device of [Fig.l].

[0036] [Fig.4] is a partial perspective view of an integrated dielectric fluid circuit in a housing bottom of the device of [Fig.l].

[0037] [Fig.5] is a bottom view of the device of [Fig.l] on which a wall of case closure is removed.

[0038] [Fig.6] shows a perspective view of a plug for closing an orifice of associated drain in the bottom of the housing, fitted with a non-return device.

[0039] [Fig.7] is another sectional view of the device of [Fig.l] at a plug fitted with a non-return device and closing an associated drain hole in the bottom of the housing.

[0040] In these figures, identical elements have the same reference numbers.

[0041] 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, without departing from the scope of the invention, as defined by the claims.

[0042] With reference to [Fig.l], the invention relates to a thermal regulation device 1 which may be intended to equip a vehicle, in particular a motor vehicle.

[0043] The thermal regulation device 1 may comprise a housing 3, for example of generally parallelepiped shape.

[0044] In the remainder of the description, the longitudinal axis L, the vertical axis V and the transverse axis T indicated in [Fig.l] by the trihedron (L, V, T) are adopted without limitation. The longitudinal axis L corresponds to the main extension direction of the housing 3. The transverse axis T corresponds to the width direction of the housing 3. The vertical axis V and the transverse axis T are perpendicular to the longitudinal axis L and perpendicular to each other. The vertical axis V corresponds to a vertical axis of a vehicle for example when the regulation assembly 1 is installed in the operating position in this vehicle.

[0045] The housing 3 may comprise a container 31 open on at least one side and a cover 33 which closes the housing 3 when it is assembled to the container 31. The housing 3, in particular the container 31, comprises a housing bottom 35 opposite the cover 33 when the housing 3 is closed. The housing bottom 35 and the cover 33 are opposite along the vertical axis V.

[0046] Better visible in [Fig.2], the housing bottom 35 can be formed of a support 37 and a closing wall 39 assembled to each other, for example by welding.

[0047] The housing 3 has an internal volume which can define a compartment 4 or be divided into several compartments 4. Each compartment 4 is delimited among other things by the housing bottom 35, in particular by the support 37.

[0048] The housing 3 may further comprise a predefined number of crosspieces 5 ([Fig.3]), for example produced by extrusion.

[0049] Such crosspieces 5 extend from the support 35, for example perpendicular to the support 35. Each crosspiece 5 can extend along the vertical axis V. The crosspieces 5 extend, for example, from the support 35 in the direction of the cover 33 when the housing 3 is closed.

[0050] The crosspieces 5 may have a longitudinal shape. In addition, the crosspieces 5 may extend in the length direction of the parallelepiped housing 3, i.e. along the longitudinal axis L. In particular, the crosspieces 5 may extend over the entire length of the housing 3. Alternatively, the crosspieces 5 may extend in the width direction of the parallelepiped housing 3, i.e. along the transverse axis T. In particular, the crosspieces 5 may extend over the entire width of the housing 3.

[0051] The thermal regulation device 1, and more precisely the housing 3, is intended to receive one or more electronic and / or electrical components 7 within the or each compartment 4. These are in particular components 7 whose temperature must be regulated, for example reduced. According to one option, the thermal regulation device 1 can receive one or more modules comprising the electronic and / or electrical component(s) 7. A module can also be defined as a container or housing comprising one or more electronic and / or electrical components 7.

[0052] The component(s) 7 or module(s) are carried by the support 37 of the housing base 35.

[0053] By way of non-limiting example, the thermal regulation device 1 may be a battery pack comprising a plurality of energy storage cells, the temperature of which must be regulated. A component 7 may be an energy storage cell. The thermal regulation device 1 may comprise modules comprising several energy storage cells. Each module may be formed by a group of cells connected to each other.

[0054] In the illustrated examples, the components 7 or modules are represented schematically with a general parallelepiped shape. Of course, any other shape can be envisaged.

[0055] The components 7 or modules may be arranged in one row or in several rows. These rows are advantageously arranged parallel to each other. One or more rows may be arranged in each compartment 4. A crosspiece 5 may extend opposite an entire row of components 7. When the assembly 1 comprises several rows of components 7 or modules, a crosspiece 5, in particular a fluid distribution crosspiece 5, may be arranged between two consecutive rows of components 7 or modules.

[0056] The temperature of the component(s) 7 or module(s) may be intended to be thermally regulated by spraying dielectric fluid onto one or more surfaces of the components 7 or modules. Alternatively, the thermal regulation may be carried out by at least partial immersion of the components 7 or modules in a bath of dielectric fluid. The dielectric fluid may be single-phase or two-phase. The latter is, for example, chosen according to its phase change temperatures.

[0057] In the case of a two-phase dielectric fluid, when it is sprayed in liquid phase, it tends to evaporate on contact with the components 7 or modules which have for example heated up during their operation. The vapor can possibly subsequently be cooled by a cooling circuit.

[0058] In the case of a single-phase dielectric fluid, once projected, in particular in the liquid phase, the dielectric fluid can possibly be re-aspirated by a pump, for example, in order to be cooled before being reintroduced.

[0059] A dielectric fluid circuit 8, partly visible in Figures 4 and 5, is provided for this purpose. This circuit 8 comprises at least one circulation channel 9 for the dielectric fluid opening onto compartment 4 or an associated compartment.

[0060] A main supply channel 10 may be in fluid communication with one or more circulation channels 9 which may be in bypass. At least some of the circulation channels 9 may extend in parallel.

[0061] Advantageously, at least one of the channels 9, 10 can be integrated into the housing 3, in particular at the level of the housing bottom 35, more precisely between the support 37 and the closing wall 39.

[0062] A dielectric fluid inlet mouth configured to bring the dielectric fluid into the dielectric fluid circuit 8 may be provided. The housing 3, and in particular the housing bottom 35 or other wall of the container 31, integrating the channels 9, 10 may comprise this inlet mouth. The main supply channel 10 is in fluid communication with the inlet mouth.

[0063] The circulation channel(s) 9 make it possible to convey the dielectric fluid so as to spray or immerse at least partially one or more components received in an associated compartment 4.

[0064] These circulation channels 9 may be in fluid communication with at least some of the crosspieces 5 which may be configured to allow distribution of dielectric fluid within the housing 3. Such crosspieces are then called fluid distribution crosspieces 5. The circulation channels 9, in particular outside the main supply channel 10, may have at least one bent portion to end under a fluid distribution crosspiece 5.

[0065] According to an exemplary embodiment, the fluid distribution crosspieces 5 comprise at least one dielectric fluid inlet 51, at least one dielectric fluid distribution orifice 53, and at least one dielectric fluid conveying conduit 55.

[0066] The dielectric fluid inlet 51 is in fluid communication with a channel of traffic 9.

[0067] The dielectric fluid distribution orifice 53 is arranged at one end of the fluid distribution crosspiece 5 opposite the support 37. A distribution orifice 53 may be provided for spraying dielectric fluid onto one or more components 7 or modules.

[0068] The dielectric fluid conveying conduit 55 places the dielectric fluid inlet 51 and the dielectric fluid distribution orifice 53 in fluid communication, and is shaped to direct the dielectric fluid towards the distribution orifice 53. The fluid distribution crosspieces 5 are in this example used to convey the dielectric fluid arriving from the circulation channels 9 and which rises through the conveying conduit(s) 55 to the distribution orifices 53.

[0069] The dielectric fluid circuit 8 further comprises at least one collection channel 11 for the dielectric fluid arranged in the housing bottom 35, more precisely between the support 37 and the closing wall 39.

[0070] A main discharge channel 12 may be in fluid communication with one or more collection channels 11 which may be branched off. At least some of the collection channels 11 may extend in parallel. The collection channels 11 may be arranged between two consecutive crosspieces 5.

[0071] The collection channels 11 make it possible to recover the dielectric fluid after spraying or immersing at least part of the component(s) 7 received in the respective compartments 4 and to discharge into the discharge channel 12.

[0072] A dielectric fluid outlet mouth configured to discharge the dielectric fluid to the outside of the housing 3 may be provided. Such an outlet mouth may be formed in the housing 3, in particular in the housing bottom 35 or other wall of the container 31. The main discharge channel 12 is in fluid communication with this outlet mouth.

[0073] The dielectric fluid circuit 8 comprises for example a distribution ramp 13 at the end of a respective crosspiece 5, opposite the support 37. The distribution orifices 53 may possibly open into a cavity of this distribution ramp which makes it possible to distribute the dielectric fluid in an associated compartment 4.

[0074] The dielectric fluid circuit 8 may further comprise a predefined number of nozzles (not shown) for spraying dielectric fluid, also called jets. Such nozzles may be arranged so as to project and spray dielectric fluid onto at least one surface of at least one component or module 7. In operation, these nozzles may be supplied with dielectric fluid via the supply channels. The nozzles may each comprise one or more orifices for projecting the dielectric fluid. electric. When provided, the nozzles may for example be arranged in fluid communication with at least one distribution orifice 53 of an associated fluid distribution crossmember 5 and / or with a distribution ramp at the end of a crossmember 5.

[0075] Furthermore, the housing bottom 35 further comprises at least one drain orifice 15. A drain orifice 15 can be associated with each compartment 4. The drain orifice 15 can be removably closed by a plug 17, and when this plug 17 is removed, emptying of the respective compartment 4 takes place by gravity.

[0076] The plug 17 is therefore arranged below the support 37, or more precisely below a respective compartment 4 of the thermal regulation device 1, along the vertical axis V.

[0077] This stopper 17 can be made of a plastic material.

[0078] The plug 17, better visible in figures 6 and 7, further comprises a member non-return 19. The non-return member 19 may be made of a more flexible plastic material than the plastic material used for the stopper 17.

[0079] The non-return member 19 may be made by a flap for example, or even a valve. The non-return member 19 is arranged so as to allow the flow of the dielectric fluid in a first direction A, and to block the flow of the dielectric fluid in a second direction opposite to the first direction A.

[0080] When the thermal regulation device 1, and more precisely the housing 3, comprises at least two compartments 4 which are distinct and advantageously sealed from each other, at least one plug 17 comprising a non-return member 19 can be associated with each compartment 4, so that the non-return member(s) 19 associated with a compartment 4, which is for example lower than other compartment(s) 4 along the vertical axis V when the vehicle is moving, make it possible to prevent dielectric fluid coming from at least one other compartment 4 which would be higher along the vertical axis V, from flowing back towards the lower compartment 4.

[0081] According to the illustrated embodiment, the plug 17 comprising the non-return member 19 is arranged in an associated collection channel 11. For each compartment 4, at least one collection channel 11 can be provided, and for each collection channel 11 at least one drain orifice 15 and a corresponding plug 17 are provided.

[0082] The plug 17 has in particular a structure 171 which is inserted into the drain orifice 15 by extending through the collection channel 11. This plug 17 also comprises a closure surface 172, for example a closure plate, making it possible to close the drain orifice 15. The structure 171 comprises for example partitions or walls, for example two opposite partitions extending from the closure surface 172 towards the support 37, when the plug 17 closes the drain hole 15. The two partitions can be connected at least on one side by a beam.

[0083] According to one example, the non-return member 19 comprises at least one movable element. It may be a membrane or a movable flap 21, for example by pivoting. The non-return member 19 may comprise a base 23 from which this flap 21 may extend.

[0084] The flap 21 of the non-return member 19 can be moved in pivoting, as shown diagrammatically by the arrow B, around a pivoting axis materialized by the base 23. The pivoting can be caused by the flow of the dielectric fluid in the first direction A from a position of closing the collection channel 11 to a position of releasing the collection channel 11. The flap 21 in the closing position is shown in broken lines in [Fig.7], while the flap 21 in the releasing position is shown in solid lines. The flap 21 can of course take any intermediate position.

[0085] The flap 21 of the non-return member 19 extends mainly in a longitudinal direction C. The width of the flap 21 extends in this example in a transverse direction which is parallel to the pivot axis.

[0086] When the flap 21 is in the closed position (in broken lines), the flap 21 has for example a slope inclined relative to the support 37. This slope is downwards towards the closing wall 39, or towards the surface or closing plate 172 of the plug 17. On the contrary, in the released position, the flap 21 can extend parallel or substantially parallel to the support 37.

[0087] The flap 21 may comprise at least one rib 25 extending transversely to the longitudinal direction C of the flap 21, i.e. in the width direction. The rib 25 may be continuous over the entire width of the flap 21. Several ribs 25 may be provided, possibly being regularly spaced along the longitudinal direction C.

[0088] Advantageously, the non-return member 19 is removably mounted on the plug 17. This makes it possible, for example, to be able to replace or change this non-return member 19 independently of the plug 17, without having to change the plug 17 in its entirety, for example.

[0089] The structure 171 of the plug 17 may act as or comprise a holding structure for the non-return member 19. This holding structure 171 may cooperate by complementarity of shape with the base 23 of the non-return member 19. The base 23 may in particular have a “C” shape in cross section. The base 23 then has a central portion connecting two lateral wings. This base 23 may be mounted or fitted onto an edge of the holding structure 171, for example on an edge of the beam connecting the two partitions forming at least part of the structure 171 maintenance.

[0090] The base 23 of the non-return member 19 then has a part, in particular the central portion of the “C” shape, which is sandwiched between the support 37 and the holding structure 171.

[0091] Furthermore, the base 23 of the non-return member 19 may comprise a lip 27 which is compressed against the support 37, when the plug 17 closes the drain orifice 15 and the base 23 of the non-return member 19 is sandwiched between the support 37 and the holding structure 171.

[0092] Finally, the plug 17 advantageously comprises a sealing joint 29 arranged around the structure 171 forming a holding structure, in particular around the partitions defining the structure 171.

[0093] The thermal regulation device 1 may also comprise one or more elements or members necessary for the operation of the dielectric fluid circuit and the circulation of the dielectric fluid, not described in more detail, such as at least one pump, a heat exchanger.

[0094] Thus, for a respective compartment 4, the plug 17 can be removed so as to empty at least the dielectric fluid in the compartment 4 and in one or more of the channels in fluid communication with this compartment 4. The plug(s) 17 can also allow the emptying of the entire dielectric fluid circuit 8 and of all the compartments 4.

[0095] The cap 17 is accessible from the outside, in particular from below the thermal regulation device 1, and can be removed simply without any disassembly other than its own fixings.

[0096] This plug 17 can form a support plug integrating a non-return member 19, which facilitates the insertion of the latter, at a strategic location, in the dielectric fluid circuit 8.

[0097] The non-return member 19 makes it possible to maintain a minimum of dielectric fluid in all the compartments and channels of the dielectric fluid circuit, even in the event of inclination of the thermal regulation device 1, by preventing the dielectric fluid from accumulating in certain compartments, for example the lowest ones relative to the vertical.

[0098] Furthermore, the non-return member 19 can be easily replaced, for example in the event of wear or deterioration over time, without having to change the entire plug 17 if the rest of the plug 17 is still functional.

Claims

Claims

1. Device (1) for thermal regulation of a predefined number of electronic and / or electrical components (7), in particular for a motor vehicle, said device comprising: - a housing (3) comprising at least one compartment (4) configured to receive at least one electronic and / or electrical component (7), the at least one compartment (4) being delimited at least by a housing bottom (35), and - a dielectric fluid circuit (8) comprising at least one circulation channel (9) for the dielectric fluid opening onto the at least one compartment (4), so as to spray and / or immerse at least in part the at least one electronic and / or electrical component (7) with dielectric fluid when it is received in the compartment (4), - characterized in that the housing bottom (35) comprises at least one drain orifice (15) associated with the at least one compartment (4) so as to allow draining by gravity,the drain orifice (15) being removably closed by a plug (17).,

2. Device (1) according to the preceding claim, in which the plug (17) comprises a non-return member (19) arranged so as to allow the flow of the dielectric fluid in a first direction (A), and to block the flow of the dielectric fluid in a second opposite direction.

3. Device (1) according to the preceding claim, in which the non-return member (19) is removably mounted on the stopper (17).

4. Device (1) according to one of claims 2 or 3, in which the housing base (35) comprises a support (37) configured to carry the predefined number of electronic and / or electrical components (7), assembled to a closing wall (39), by delimiting at least one collection channel (11) of the dielectric fluid between the support (37) and the closing wall (39), and in which the plug (17) comprising the non-return member (19) is arranged in the collection channel (11).

5. Device (1) according to the preceding claim, in which the non-return member (19) comprises a flap (21) configured to be moved in pivoting by the flow of the dielectric fluid in the first direction (A) from a position of closing the collection channel (11) to a position of releasing the collection channel (11).

6. Device (1) according to the preceding claim, in which the flap (21) of the non-return member (19) extends mainly in a longitudinal direction (C) and comprises at least one rib (25) extending transversely to the longitudinal direction (C) of the flap (21).

7. Device (1) according to one of claims 5 or 6, in which the flap (21) has a slope inclined relative to the support (37) and descending towards the closing wall (39), when the flap (21) is in the closing position.

8. Device (1) according to one of claims 4 to 7, in which the stopper (17) comprises a holding structure (171) cooperating by complementary shape with a base (23) of the non-return member (19), the base (23) of the non-return member (19) being sandwiched between the holding structure (171) and the support (37).

9. Device (1) according to the preceding claim, in which the base (23) of the non-return member (19) comprises a lip (27) compressed against the support (37).

10. Device (1) according to one of claims 8 or 9, in which the stopper (17) comprises a sealing gasket (29) arranged around the holding structure (171).

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