WO2023227616A1

WO2023227616A1 - Fluid circulation module having at least two pumps and cooling system having at least one such module

Info

Publication number: WO2023227616A1
Application number: PCT/EP2023/063813
Authority: WO
Inventors: Eric Colin; Nicolas JACQUET
Original assignee: Sogefi Air & Cooling
Priority date: 2022-05-25
Filing date: 2023-05-23
Publication date: 2023-11-30
Also published as: FR3136127A1

Abstract

The present invention relates to a fluid circulation module (1) having at least two electric pumps (3, 3'), each pump (3, 3') comprising a stator (4, 4') and a rotor (5, 5') rigidly attached to a turbine (6) housed in its own transfer chamber (7, 7'), which transfer chamber has at least one fluid inlet (8, 8') and at least one fluid outlet (9, 9'), the module (1) also comprising electronic power components (10) and electronic control components (11) for powering and controlling the pumps (3, 3'). The module (1) is characterised in that the at least two stators (6, 6') and the different electronic components (10 and 11) of the at least two pumps (3, 3') are jointly accommodated in a single sealed common housing (12), the rotors (5, 5') being mounted on the outside of the single housing (12).

Description

Title of the invention: Fluid circulation module with at least two pumps and cooling system comprising at least one such module

[0001] The present invention relates to the field of fluid circulation and distribution equipment, in particular in on-board circuits, in particular pump devices or similar fluid circulation and transfer devices, in particular multi-devices. pumps, and more specifically electric water or functional liquid pump devices.

[0002] In this context, the subject of the invention is a fluid circulation module with at least two pumps and a cooling system comprising at least one such module.

[0003] Such a module and such a system will find particular application in cooling systems for thermal or electric motor vehicles.

[0004] In a known manner, many vehicle cooling systems require at least two different circuits for circulating a cooling fluid, each being provided with its own hydraulic pump generating the circulation of the fluid within its circuit.

[0005] In these known cooling systems with at least two distinct and separate circuits, each pump has its own hydraulic structure, its own motor, its own control electronics and/or its own connectors: they thus constitute distinct physical units and separated, even if they can possibly be mounted on the same mounting support. More particularly, in these systems, each pump, belonging to a given circulation circuit, has its specific dedicated electrical operating elements, that is to say its own power electronics and its own management electronics, which together control its activation and its operation to allow the circulation of the fluid to be controlled.

[0006] Thus, within known cooling systems, it is currently necessary to multiply these individual operating elements, specific to each pump, and often identical, by the number of pumps present within the system.

[0007] Consequently and disadvantageously, the multiplication of individual and separate pumps increases the structural complexity of the circulation system which integrates them, generates a significant amount of space, complicates the configurations and connections of the fluidic and electrical circuits and multiplies the zones of problematic interface (watertightness, electrical insulation). In addition, the multiplication of components integrating the electrical/electronic operating elements specific to each pump generates a cost price which increases proportionally to the number of pumps present. In addition, these standard components are often underutilized when they are only assigned to the operation of a single pump.

[0008] As a result, the creation and construction of the circulation system can become very complex. Indeed, and in particular when these operating elements are at least partly housed in housings separate from the pumps themselves, it is necessary to manage both the connection of these different elements between them, as well as their positioning within the pump. system or even their space requirement, in order to guarantee the operation of the pumps distributed within the system.

[0009] From document US 2021/0254623, we know a fluid circulation module with two electric pumps, each pump comprising a stator and a rotor secured to a rotary member of the turbine or paddle wheel type, each rotary member being housed in a clean transfer chamber having at least one fluid inlet and at least one fluid outlet. These two pumps are fluidly connected to each other and can only serve a single circuit, the output of one being constructively connected to the inlet of the other. In addition, the two stators and the different electronic components of the two pumps are housed together in a single common waterproof housing, the rotors with their respectively associated rotary member also being mounted in a single hollow body, of complex shape, attached to said housing and also delimiting the transfer chambers. However, neither the arrangement nor the use of the components is optimized, and this results in a significant total footprint. [0010] The main objective of the present invention is to overcome at least the main drawbacks of the state of the art exposed above by proposing an alternative multi-pump solution allowing the circulation of a fluid in a system with at least two separate circulation circuits. It also aims to offer a fluid circulation module with at least two separate pumps, with reduced manufacturing costs, of simplified and compact design, minimizing and limiting as much as possible the number of elements, in particular electrical/electronic components, necessary to the operation of said pumps and their space requirements, while maintaining fluid circulation performance identical to separate pumps. In addition, efficient thermal regulation of the components must be ensured. In addition, the proposed solution should allow easy maintenance and/or replacement of wearing parts.

[0011] At least the main objectives set out are achieved by the invention by proposing a fluid circulation module with at least two electric pumps, each pump comprising a stator and a rotor secured to a rotary member of the turbine or impeller type. blades, each rotary member being housed in a clean transfer chamber comprising at least one fluid inlet and at least one fluid outlet, said module also comprising electronic power components and electronic management and control components ensuring power supply and controlling the operation of the pumps, said at least two stators and the different electronic components of said at least two pumps being housed together in a single waterproof common housing, the rotors with their respectively associated rotary member being mounted externally on said single housing, module characterized in that the transfer chambers are formed by cooperation of at least one hollow body with said housing on which these hollow bodies are(are) attached, in that all of the electronic power components and electronic management and control components are mounted on a single printed circuit board, in that it comprises at least one transfer and heat dissipation bridge connecting at least the electronic power components or one or more zones of the printed circuit board carrying these components, to the transferred fluid, the heat transmission taking place at through a wall portion, the or each heat transfer and dissipation bridge comprising a plate made of a material that is a good thermal conductor, such as a metal, in that the heat transmission takes place through a portion of this plate, which is in direct contact with the flow of circulating fluid and constitutes part of the wall of the sealed housing, and, in that this plate is in direct contact, or via a thermal transfer layer or pads, with at least the electronic power components or the areas of the card carrying the latter, said plate serving where appropriate as a support for the printed circuit board.

[0012] Other characteristics and advantages of the invention will emerge from the detailed description which follows of non-limiting embodiments of the invention, with reference to the appended figures, in which:

[0013] [Fig. 1 ] is a schematic sectional profile view of a two-pump module according to the invention;

[0014] [Fig. 2A] and

[0015] [Fig. 2B] are perspective views from two opposite points of view of a practical embodiment of a module as shown schematically in Figure 1;

[0016] [Fig. 3A] and

[0017] [Fig. 3B] are identical views in elevation and in section along a plane containing the axes of rotation of the turbines of the two pumps of the module shown in Figures 2, the circulation of the fluid in the transfer chambers and around the axes of rotation and the rotors being indicated schematically in Figure 3B;

[0018] [Fig. 4] is an elevational view in section along a plane perpendicular to that of Figures 3 of one of the two pumps of the module shown in Figures 2 and 3, said cutting plane also containing the axis of rotation of the turbine of this pump;

[0019] [Fig. 5] is a sectional view similar to that of Figure 4, but in an offset parallel plane, illustrating the constitution of the housing and the transfer chamber of the pump concerned (certain functional elements having been removed from the figure for better understanding) ;

[0020] [Fig. 6A] and

[0021 ] [Fig. 6B] are perspective views from two opposing points of view of a practical embodiment of a structural and functional unit comprising a module as shown in Figures 2 to 5;

[0022] [Fig. 6C] is a partial view in elevation and in section along a plane perpendicular to the axes of rotation of the turbines of the two pumps of the module of Figures 6A and 6B, the section being made at the level of the transfer chambers;

[0023] [Fig. 7A] and [Fig. 7B] are simplified schematic representations of a set of two circulation circuits of a cooling system integrating a two-pump module of the invention, said set consisting either of two independent circuits each integrating a pump, or of a single circuit comprising the two circuits of Figure 7A and the two pumps placed in fluid series, this depending on the position of a switching member of the rotary valve type.

Figures 1 to 5 in particular show a fluid circulation module (1) with at least two electric pumps (3, 3'). Each pump (3, 3') comprises a stator (4, 4') and a rotor (5, 5') secured to a rotary member (6, 6') of the turbine or paddle wheel type, each rotary member ( 6, 6') being housed in a clean transfer chamber (7, 7') comprising at least one fluid inlet (8, 8') and at least one fluid outlet (9, 9'). Said module (1) also comprises electronic power components (10) and electronic management and control components (11) ensuring power supply and operational control of the pumps (3, 3'). These components are known in themselves and do not require a more detailed description. [0025] Furthermore, said at least two stators (6, 6') and the different electronic components (10 and 1 1) of said at least two pumps (3, 3') are housed together in a single common housing (12). waterproof, and the rotors (5, 5') with their respectively associated rotary member (6, 6') are mounted externally on said single housing (12).

[0026] According to the invention, the transfer chambers (7, 7') being formed by cooperation of at least one hollow body (13) with said housing (12) on which these hollow bodies are(are). ) reported.

[0027] Preferably, and as shown in Figures 1 and 2B, each pump (3, 3') has its own hollow body (13), but of course the transfer chambers of the different pumps can be defined by sealed assembly of a single hollow body (13) with the housing (12). Thus, the two separate hollow bodies (1) illustrated in Figures 2B, 3 and 6C can, alternatively, be formed in one piece. By producing the transfer chambers (7, 7'), which house the turbines (6, 6'), by assembling one or more hollow bodies (13) in the form of shells, structurally also integrating the inlets (8, 8') and the outlets (9, 9'), with the housing (12), we arrive at a simple construction, also allowing easy replacement of the turbines and rotors.

[0028] Thanks to this physical grouping of the components of the different pumps in the same constructive structure, the result is optimal use of the available space and a pooling of resources (limiting complexity, reduction in cost and easier maintenance). The electrical and fluidic interfacing is consequently also simplified. In addition, by grouping the pumps in the same housing, the printed circuit board(s) can be larger (internal volume of a single piece of the single housing greater than the volumes of several individual boxes, and use of intermediate volumes between pumps), allowing better distribution of electronic circuits (10, 1 1) grouped together and therefore better heat dissipation. Finally, the connection to the outside can possibly be combined into a single connector, simplifying electrical connections and requiring only a single clear access to the nearby environment. Of course, the different pumps (3, 3') integrated into the module (1) can have completely independent, partially independent or dependent operations, and be part of either separate and independent circuits, or of the same circuit, this depending on the connections of their inputs and outputs.

Likewise, each pump can have its own components, even when their operations are mutually dependent.

[0031] However, advantageously, and with a view to optimization in terms of exploitation of resources and limitation of costs, complexity and size, it is planned that at least certain power electronic components (10) and/or electronic management and control components (11) are functionally assigned to both, or at least two of the, pumps (3, 3'), through a mutually shared and/or alternative use of these components , for example through complementary operating time windows or through sharing of hardware and/or software resources.

Likewise, when a given component is oversized in relation to its use by a single pump, or when it has several treatment channels, it can also be shared by at least two different pumps, even if these present completely independent operations.

[0033] In accordance with the invention, all of the electronic power components (10) and the electronic management and control components (1 1) are mounted on a single printed circuit board (14), the electronic components power unit (10) advantageously comprising at least one insulated gate field effect transistor and the electronic management and control components (1 1) advantageously comprising at least one microcontroller.

[0034] This results in a compact construction with a high occupancy density of the interior volume of the housing (little wasted dead space). The overall size of the module (1) can be optimally reduced when the two pumps constituting it are arranged in a coplanar manner, preferably in a plane parallel to that of the printed circuit (14).

[0035] Preferably, the module (1) comprises two pumps (3 and 3'), identical or not, for circulating a liquid fluid (F), in particular a liquid of cooling, each pump having its own and independent inlet (8, 8') and its own and independent outlet (9, 9').

Advantageously, and as shown in the appended figures, the inlets (8, 8') and the outlets (9, 9') are configured and arranged in relation to the turbines (6, 6') in such a way that the flow of liquid (F) enters the transfer chamber (7, 7') of a pump (3, 3') in an axial direction, that is to say in the direction of the axis of rotation (6 ”) of its turbine (6, 6'), and emerges in a direction tangential to the turbine (6, 6') concerned in a plane perpendicular to this axis.

[0037] A substantially flat and overall particularly compact construction can be achieved when the pumps (3, 3') are located in the same plane and this plane is parallel to that of the printed circuit (14).

[0038] Also in accordance with the invention and with a view to securing the operation of the motor of each pump, in particular taking into account the grouping of its electronics with those of the other motor(s) in a restricted and confined space, the module comprises, as shown for example in Figures 1 and 3 to 5, at least one transfer and heat dissipation bridge (15, 16) connecting at least the power electronic components (10), preferably a majority or all different components (10 and 1 1), or one or more zones of a printed circuit board (14) carrying these components (10, 1 1), to the fluid (F) transferred, the heat transmission taking place through a wall portion (151), preferably exposed directly to the fluid flow (F).

Of course, and as shown schematically in Figure 1 (for a given type of circulation), each power component (10) in particular or each zone of the card (14) carrying the latter can be in direct contact or not (interposition of a thermal transfer layer 16 - see Figure 1 as an example) with such a wall portion. In addition, the aforementioned wall portion (151) can of course consist of a portion of the wall forming the housing (12) or one of the constituent parts of the latter (in particular a thinned zone of the wall of the housing when this the latter is made of plastic material).

[0040] In accordance with the invention and with a view to ensuring better heat transfer, and as is also apparent from the aforementioned Figures 3 to 5, the transfer bridge and heat dissipation (15, 16) comprises a plate (15) made of a material that is a good thermal conductor, such as a metal (steel sheet, aluminum plate,

a portion of which (151) is in direct contact with the circulating fluid (F) and constitutes part of the wall of the sealed housing (12), this plate (15) being in direct contact, or via a layer or thermal transfer pads (16), with at least the power electronic components (10), preferably with a majority or all of the different components (10 and 1 1), or the areas of the card (14) carrying the latter, said plate serving where appropriate as a support for the printed circuit board (14). In the latter case, it also participates in the structural reinforcement of the module.

[0041] As shown in Figures 3 and 4 in particular, the axes or rotation shafts (6”) of the rotary members (turbines 6, 6') and the rotors (5, 5') are each mounted in a recessed housing (25) of the housing (12) extending into the winding of the corresponding stator (4, 4') and traversed by the fluid (this housing being in fluid communication with the associated transfer chamber). The wall portion (151) forming part of the corresponding thermal bridge (15, 16) constitutes the bottom of this housing (25), which it closes in a watertight manner (seal 26) and the shaft or axis of rotation (6”) considered having a hollow structure allowing loop circulation of the fluid flow (F) in this housing (see Figure 3B as an example of direction of circulation). The circulation of the fluid between said axis of rotation (6”) and the side wall of the housing (25) which receives it can optionally be directed in guiding structures such as channels or similar guiding structures (25’).

[0042] Thus, the power components (10), common to the two pumps (3, 3'), are cooled by a secondary flow of fluid (F), derived from the main flow passing through the two transfer chambers (7 , 7'), and this via two wall/plate portions (151) directly in contact with the fluid. As shown by the arrows in Figures 1 and 3B, the secondary flow impacting the wall portions (151) of the thermal bridges (15, 16) also licks the walls of the housings (25) of the housing (12) behind which are arranged the stator coils (4, 4').

[0043] In order to allow control of the circulation of fluid, integrated at the module level and adapted management of the pumps, said module (1) can comprise at at least one sensor (17) for measuring a physical quantity linked to the fluid (F), in particular a temperature sensor, a pressure sensor, a flow sensor and/or a level sensor, at least the electronic part of the or each of said sensors (17) being mounted on the or a printed circuit board also carrying the electronic power components (10) and the electronic management and control components (1 1).

[0044] By integrating a certain number of control and security functions into the module (1), we arrive at a so-called “intelligent” module that can operate autonomously, at least partially.

[0045] This at least partial functional independence of the module (1) also facilitates its connection with the outside.

[0046] Thus, it can comprise (Figures 2A and 6A) at least one connector, preferably a single connector (18), comprising power supply pins and bidirectional signal transmission pins, the latter being preferably configured to form a local interconnected network bus according to ISO 17987 or LIN bus.

[0047] In accordance with a preferred embodiment of the invention, the module (1) comprises two pumps, identical or not, for circulating a liquid fluid (F), in particular a cooling liquid, each defining through its respective transfer chamber (7, 7'), a circulation path between its entrance(s) and its exit(s). As shown in Figures 1, 2B, 3B, 4 and 6C, the inlets (8, 8') and outlets (9, 9') are arranged and configured in such a way that the liquid flow enters the transfer chamber of a pump in an axial direction (in the direction of the axis of rotation 6” of the corresponding turbine 6, 6') and emerges in a tangential direction in a plane perpendicular to this axis.

[0048] In order to be able to create in particular a safety or default operating mode, or simply to be able to ensure two alternative modes of circulation, the module (1) can also comprise, or be associated with, at least one control unit. switching (19), such as a rotary or slide multi-way valve, making it possible to move from a configuration of separate traffic lanes arranged in parallel (FIG. 7A) to a configuration of traffic lanes interconnected and arranged in series (Figure 7B). The electronic management and control components (11) advantageously comprise a microcontroller, in particular configured to control the state of this organ (19), for example following the evaluation of a signal coming from a sensor (17) of measurement of a physical quantity linked to the fluid (F). The symbolic representations of Figures 7A and 7B show how the switching member (19), here a two-way rotary valve, makes it possible to switch from a configuration to two separate circuits, arranged in parallel with respect to the module (1) and each integrating only one of the two pumps (3, 3') - figure 7A -, in a single circuit configuration integrating the two pumps (3 and 3') fluidly arranged in series - figure 7B

[0049] Typically, the body of the housing (12) can be made up of two constituent parts (12', 12”) of thermoplastic material, assembled together at a single joint plane (PJ), said body possibly integrating fixing sites (22) of the module (1). The watertight assembly of these two constituent parts can be carried out by welding, riveting, screwing, gluing or clipping, for example. A second joint plane (PJ’) exists between the housing (12) and the or each hollow body (13).

[0050] The invention also provides a multi-pump module whose mobile components are easily interchangeable.

[0051] The invention also relates, as shown schematically in Figure 6, to a cooling system (20) of a vehicle, in particular of a thermal or electric motor vehicle, comprising at least two circuits (21, 21 ') for circulating a cooling liquid (F), arranged in parallel, each circuit (21, 21 ') comprising a pump (3, 3') intended for the circulation of said cooling liquid (F) in the circuit considered.

[0052] According to the invention, this system is characterized in that the at least two pumps (3 and 3') form an integral part of a fluid circulation module (1) as mentioned above.

[0053] This system can further comprise, preferably located near the pumps (3, 3'), and possibly integrated into the fluid circulation module (1), at least one switching member (19) arranged to be crossed by the fluid flows (F) of the two circulation circuits (21 and 21 ') and configured to allow said system (20) to move selectively from a first configuration with a parallel and separate arrangement of the circulation circuits (21, 21 ') to a second configuration with a series and interconnected arrangement of the latter, and vice versa.

[0054] In accordance with an even more integrated embodiment variant, illustrated by way of example in Figure 6, a multi-channel distribution part (23), preferably in the form of a plate and integrating parts of conduits (24) constituting portions of the circulation circuits (21, 21 '), is attached to the circulation module (1) on the side of the hollow body(s) (13) of said module to form with it a structural and functional unit, said conduit parts (24) being tightly connected to the fluid inlets and outlets (8, 8', 9, 9') of the transfer chambers (7, 7'). We thus constitute a structural and functional unit which can, if necessary, incorporate the switching member (19) in said distribution part (23). Some of the fixing sites (22) of the module (1) can then be used for its assembly with said part (23). And said part (23) can include its own fixing sites (22') for mounting the unit (1, 23) in the installation environment (space under the hood of a vehicle for example).

[0055] As also shown in Figures 6, and depending on the desired or imposed connection configuration, the openings of the conduit parts (24) of the multi-channel distribution part (23) not connected to the fluid inlets and outlets ( 8, 8', 9, 9') open out, at least for some of them, at the edge of the plate formed by the multi-channel distribution part (23).

[0056] According to a preferred constructive variant, the cooling system (20) comprises two separate circulation circuits (21 and 21'), the module (1) comprises two pumps (3 and 3') and said switching member (19). ) is actuated, in particular to switch said system (20) from a parallel configuration to a series configuration, in the event of a malfunction or failure of one or the other of the two pumps (3, 3') each integrated in one of the two circulation circuits (21 and 21 ') of cooling liquid (F), for example detected by a sensor (17) for measuring a physical quantity linked to the fluid (F) in the circulation circuit (21 or 21') of the pump (3 or 3') faulty. [0057] Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

[Claim 1] Module (1) for circulating fluid with at least two electric pumps (3, 3'), each pump (3, 3') comprising a stator (4, 4') and a rotor (5, 5' ) integral with a rotary member (6, 6') of the turbine or paddle wheel type, each rotary member (6, 6') being housed in a clean transfer chamber (7, 7') comprising at least one inlet of fluid (8, 8') and at least one fluid outlet (9, 9'), said module (1) also comprising electronic power components (10) and electronic management and control components (1 1) ensuring power supply and operation control of the pumps (3, 3'), module (1) in which said at least two stators (6, 6') and the different electronic components (10 and 1 1) of said at least two pumps (3, 3') are housed together in a single common waterproof housing (12), the rotors (5, 5') with their respectively associated rotary member (6, 6') being mounted externally on said single module housing (12). (1) characterized in that the transfer chambers (7, 7') are formed by cooperation of at least one hollow body (13) with said housing (12) on which this hollow body(s) is(are) attached (s), in that all of the electronic power components (10) and the electronic management and control components (1 1) are mounted on a single printed circuit board (14), in that it comprises at least one transfer and heat dissipation bridge (15, 16) connecting at least the power electronic components (10) or one or more zones of the printed circuit board (14) carrying these components (10, 1 1), to the fluid (F) transferred, the or each transfer and heat dissipation bridge (15, 16) comprising a plate (15) made of a material that is a good thermal conductor, such as a metal, in that the heat transmission takes place through a portion (151) of this plate (15), which is in direct contact with the flow of fluid (F) circulating and constitutes part of the wall of the sealed housing (12), and, in that this plate ( 15) is in direct contact, or via a thermal transfer layer or pads (16), with at least the power electronic components (10) or the areas of the card (14) carrying the latter, said plate (15) serving where appropriate as a support for the printed circuit board (14).

[Claim 2] Fluid circulation module (1) according to claim 1, characterized in that at least certain electronic power components (10) and/or electronic management and control components (1 1) are functionally assigned to the two, or at least two of, pumps (3,

3’), this through mutually shared and/or alternative use of these components, for example through complementary operating time windows or through sharing of hardware and/or software resources.

[Claims] Module (1) for fluid circulation according to claim 1 or 2, characterized in that the electronic power components (10) comprise at least one insulated gate field effect transistor and the electronic management components and control (11) comprise at least one microcontroller.

[Claim 4] Fluid circulation module (1) according to any one of claims 1 to 3, characterized in that the axes or rotation shafts (6”) of the rotary members (6, 6') and the rotors ( 5, 5') are each mounted in a recessed housing (25) of the housing (12), which extends into the winding of the corresponding stator (4, 4') and is traversed by the fluid, this housing being in fluid communication with the associated transfer chamber (7, 7').

[Claim 5] Fluid circulation module (1), according to the preceding claim, characterized in that the wall portion (151) forming part of the or each thermal bridge (15, 16) constitutes the bottom of the housing (25) respectively corresponding, that it closes in a watertight manner and in that the rotation shaft (6”) considered has a hollow structure allowing loop circulation of the fluid flow (F) in this housing (25).

[Claim 6] Fluid circulation module (1), according to any one of claims 1 to 5, characterized in that it comprises at least one sensor (17) for measuring a physical quantity linked to the fluid (F ), in particular a temperature sensor, a pressure sensor, a flow sensor and/or a level sensor, at least the electronic part of or each of said sensors (17) being mounted on the or a printed circuit board also carrying the electronic power components (10) and the electronic management and control components (1 1).

[Claim 7] Fluid circulation module (1), according to any one of the preceding claims, characterized in that it comprises at least one connector, preferably a single connector (18), comprising power supply pins and bidirectional signal transmission pins, the latter being preferably configured to form a local interconnected network bus according to the ISO 17987 standard or LIN bus.

[Claim 8] Fluid circulation module (1), according to any one of claims 1 to 7, characterized in that it comprises two pumps (3 and 3'), identical or not, for circulating a fluid (F) liquid, in particular a cooling liquid, each defining, through its respective transfer chamber (7, 7'), a circulation path between its inlet(s) and its outlet(s) ).

[Claim 9] Fluid circulation module (1), according to any one of claims 1 to 8, characterized in that it comprises two pumps (3 and 3'), identical or not, for circulating a fluid (F) liquid, in particular a cooling liquid, each pump having its own and independent inlet (8, 8') and its own and independent outlet (9, 9').

[Claim 10] Fluid circulation module (1), according to any one of claims 1 to 9, characterized in that the inlets (8, 8') and the outlets (9, 9') are configured and arranged by relative to the turbines (6, 6') in such a way that the flow of liquid (F) enters the transfer chamber (7, 7') of a pump (3, 3') in an axial direction, c 'that is to say according to the direction of the axis of rotation (6”) of its turbine (6, 6'), and emerges in a direction tangential to the turbine (6, 6') concerned in a plane perpendicular to this axis.

[Claim 1 1] Fluid circulation module (1), according to any one of claims 8 to 10, characterized in that it comprises, or is associated with, at least one switching member (19), such as 'a rotary or slide multi-way valve, making it possible to move from a configuration of separate traffic lanes arranged in parallel to a configuration of traffic lanes interconnected and arranged in series, the electronic management and control components (1 1) advantageously comprising a microcontroller, in particular configured to control the state of this organ (19), for example following the evaluation of a signal coming from a sensor (17) for measuring a physical quantity linked to the fluid (F).

[Claim 12] Fluid circulation module (1), according to any one of claims 1 to 11, characterized in that the body of the housing (12) consists of two constituent parts of thermoplastic material, assembled together at the level of a single joint plane, said body possibly integrating fixing sites (22) of the module (1).

[Claim 13] Cooling system (20) of a vehicle, in particular of a thermal or electric motor vehicle, comprising at least two circuits (21, 21 ') for circulating a cooling liquid (F), arranged in parallel, each circuit (21, 21 ') comprising a pump (3, 3') intended for the circulation of said cooling liquid (F) in the circuit considered, system characterized in that the at least two pumps (3 and 3' ) are an integral part of a fluid circulation module (1) according to any one of claims 1 to 12.

[Claim 14] Cooling system (20) according to the preceding claim, characterized in that it comprises, preferably located near the pumps (3, 3'), and possibly integrated into the fluid circulation module (1), at least one switching member (19) arranged to be crossed by the fluid flows (F) of the two circulation circuits (21 and 21 ') and configured to allow said system (20) to selectively switch from a first configuration with a parallel and separate arrangement of the circulation circuits (21, 21 ') to a second configuration with a series and interconnected arrangement of the latter, and vice versa.

[Claim 15] Cooling system (20) according to any one of claims 13 or 14, characterized in that a multi-channel distribution part (23), preferably in the form of a plate and integrating parts of conduits (24) constituting portions of the circulation circuits (21, 21 '), are attached to the circulation module (1) on the side of the hollow body(s) (13) of said module to form with it a structural and functional unit, said conduit parts (24) being tightly connected to the fluid inlets and outlets (8, 8', 9, 9') of the transfer chambers (7, 7').

[Claim 16] Cooling system (20) according to claim 15, characterized in that the openings of the conduit parts (24) of the multi-channel distribution part (23) not connected to the fluid inlets and outlets (8, 8' , 9, 9') open out, at least for some of them, at the edge of the plate formed by the multi-channel distribution part (23).

[Claim 17] Cooling system (20) according to any one of claims 13 to 16, characterized in that it comprises two distinct circulation circuits (21 and 21 '), in that the module (1) comprises two pumps (3 and 3') and in that said switching member (19) is actuated, in particular to switch said system (20) from a parallel configuration to a series configuration, in the event of a malfunction or failure of the 'one or the other of the two pumps (3, 3') each integrated in one of the two circulation circuits (21 and 21') of coolant (F), for example detected by a sensor ( 17) for measuring a physical quantity linked to the fluid (F) in the circulation circuit (21 or 21 ') of the faulty pump (3 or 3').