FR2842249A1 - MODULE AND COOLING CIRCUIT COMPRISING SUCH A MODULE - Google Patents

Abstract

The present invention relates to a cooling circuit module for vehicles with an internal-combustion engine. <??>Module characterised in that it is formed by assembly, in the region of a connection plane (P) or assembly zones, of two parts (11 and 12) made of thermoplastic material(s) sandwiched together, with at least partial nesting in end portions (6, 6'; 8, 8') of at least two conduit segments juxtaposed to form at least one corresponding circulation line (3, 3') of the cooling circuit, at least one conduit portion (2; 2') containing a device (4, 4') for measuring or regulating the flow in the line (3; 3') concerned, and in that said module (24) incorporates at least the conduits forming the main circuit (15), conduit segments forming parts (20", 21") of the secondary circuits (20 and 21) and at least one part of the feed pump (17).

Description

DESCRIPTION

  The present invention relates to the field of design and production of multi-branch fluid circulation circuits and systems for regulating the flow of fluids in conduits or circulation lines, in particular of liquids in multi-branch hydraulic circuits having several regulatory bodies.

  The present invention relates more particularly to a central cooling circuit module and a vehicle internal combustion engine cooling circuit comprising such a module.

  In a context of reducing the size of the systems 10 on board motor vehicles, in particular under the engine hood, simplifying construction, promoting ease of assembly and reducing and simplifying maintenance operations, there is a constant demand to reduce the number of components to be assembled for the production of cooling circuits, to reduce the paths of the liquid circulation lines

  cooling and reducing the size of such circuits.

  It is also advantageous to be able to have a regulating means allowing, with a single actuator, to regulate several flows or flow rates in separate circuit branches or lines, requiring no specific fixing or support and which can be dismantled without

  require disassembly of the entire circuit or the structural unit containing it.

  The present invention aims in particular to respond to one

  at least and preferably to the requests set out above.

  To this end, it relates to a module for the cooling circuit of a vehicle with an internal combustion engine, said circuit being essentially constituted, on the one hand, by a main circuit forming a circulation loop on the means for cooling the cylinders and engine cylinder heads, integrating a circulation pump in a common circuit segment and comprising two parallel circuit segments, in series with the common segment, one of which passes through a water / oil heat exchanger and the other of which incorporates a member regulating and, on the other hand, by two secondary circuits extending in bypass on the aforementioned main circuit, each integrating a respective regulating member and passing through, one, the radiator of a main unit heater dissipating the heat recovered in the surrounding environment and, the other, the radiator of a secondary air heater intended to heat the passenger compartment of the vehicle, module characterized in that it is f formed by the assembly, at a joint plane or assembly zones, of two sandwiching parts, with at least partial interlocking in end portions of at least two segments of conduits juxtaposed to form at least one corresponding circulation line of the cooling circuit, at least one portion of conduit containing a member for measuring or regulating the flow in the line concerned, and in that said module integrates at least the conduits forming the main circuit, duct segments forming parts of the secondary circuits, at least part of the circulation pump, and the three regulating members. The invention also relates to a circuit for

  cooling of a thermal engine vehicle, essentially essentially constituted, on the one hand, by a main circuit forming a circulation loop on the means for cooling the cylinders and cylinder heads of the engine, integrating a circulation pump in a common circuit segment and comprising two parallel circuit segments, one of which passes through a water / oil heat exchanger and the other of which incorporates a regulating member, on the other hand, two secondary circuits extending in bypass on the main circuit, each integrating a respective regulating member passing through, one, the radiator of a main air heater dissipating the heat recovered in the surrounding medium and, the other, the radiator of a secondary air heater intended to heat the passenger compartment of the vehicle and , finally, a degassing and charging bypass circuit passing through a coolant tank, characterized in that it comprises rte a central structural module as described above.

  The invention will be better understood from the following description, which relates to preferred embodiments, given by way of nonlimiting examples, and explained with reference to the appended schematic drawings, in which:

  FIG. 1 is a schematic fluid representation of an example of a cooling circuit comprising a module according to an embodiment of the invention; - 3 Figures 2 to 4 are different views from different perspectives of a cooling module according to an advantageous alternative embodiment of the invention, forming part of the circuit as shown in Figure 1; Figure 5 is a partially cutaway perspective view of the module of Figures 2 to 4; Figures 6A and 6B (Figures 6) are perspective views, in other directions, of the module of Figures 2 to 5 before assembly of the two component parts; FIGS. 7 and 8 are exploded views of the module represented in FIGS. 2 to 6, and, FIGS. 9A and 9B are schematic sectional views of a device of gate valves according to the invention according to two embodiments, integrated into a module according to the invention; Figure 10 is a perspective view of a valve valve device according to the embodiment of the invention of Figure 9A; FIGS. 11 to 14 are partial detail and perspective views, at different scales, of the areas of assembly of the two parts and of the valve valve device according to FIG. 10, forming

  together the module shown in Figures 2 to 6.

  FIG. 1 symbolically shows and FIGS. 2 to 8 show, in the form of an effective embodiment, a central module 24 for the cooling circuit 25 of a vehicle with an internal combustion engine.

  Said circuit 25 is essentially constituted, on the one hand, by a

  main circuit 15 forming a circulation loop on the means 16 for cooling the cylinders and cylinder heads of the engine, integrating a circulation pump 17 in a common circuit segment 17 'and comprising two parallel circuit segments 18 and 18', in series with the common segment 17 ′, one of which passes through a water / oil heat exchanger 19 (possibly associated with an oil filter 19 ′) and the other of which incorporates a regulating member 22 and, on the other hand, by two secondary circuits 20 and 21 extending in derivation on the aforementioned main circuit 15, each integrating a respective regulating member 4, 4 'and passing through, one, the radiator 35 20' of a main unit heater dissipating the recovered heat in the surrounding environment and, the other, the radiator 21 'of a secondary air heater intended to heat the passenger compartment of the vehicle.

  - 4 In accordance with the invention, said module 24 is characterized in that it is formed by the assembly, at a joint plane P or of assembly zones, of two pieces 11 and 12 of material ( x) thermoplastic (s) sandwiching, with at least partial interlocking in end portions 6, 6 '; 8, 8 'of at least two segments of conduits 7, 7'; 9, 9 'juxtaposed to form at least one circulation line 3; 3 'corresponding to the cooling circuit, at least a portion of duct 2; 2 'containing a member 4, 4' for measuring or regulating the flow in line 3; 3 'concerned, and in that said module 10 24 integrates at least the conduits forming the main circuit 15, segments of conduits forming parts 20 ", 21" of the secondary circuits 20 and 21, at least part of the pump circulation 17, and the three regulating organs 4, 4 ′, 22.

  Thus, the number of component parts forming the module 24, 15 and therefore the circuit 25, are limited, maintenance is facilitated (only the damaged part must be dismantled and changed) and no specific fixing, nor particular mounting support is necessary for mounting the regulating or measuring members 4, 4 '.

  As shown in the aforementioned figures, as well as in Figures 1 20 and 11 to 14, the module 24 advantageously comprises at least two portions of conduits 2, 2 'each mounted with interlocking in the facing end portions 6 and 6'; 8 and 8 'of two pairs of duct segments 7 and 7'; 9 and 9 ', each of which forms by end-to-end association, at the plane P or the assembly zones, of its two segments a circulation line 3; 3 'corresponding, each portion of conduit 2, 2' comprising a member 4, 4 for regulating or measuring the flow and said portions being optionally formed together in one piece.

  Preferably, the portion or portions of conduits 2, 2 ′ are formed in one piece with at least a portion 5 ′ of the means 5 for controlling, actuating or controlling the measurement organ (s) or regulation 4, 4 ′ and / or a 5 ″ protective housing containing these means.

  The duct segments 7 and 9 may, as shown in Figures 2 to 8, 9A and 11 to 14 attached, be combined into a single segment with a single end portion 6, 8 whose shape is adapted to receive adjusted way the nested component parts of the two portions of conduits 2, 2 'on the side concerned.

-5

  However, said duct segments 7 and 19, as well as the portions 6 and 8, can also be individualized and separated (FIG. 9B).

  The mechanical and fluidic assembly of the two parts 11 and 12 may also be carried out at the level of at least one other circuit segment, the constituent conduit of which is at least partially formed in the module. Thus, as can be seen from the appended figures, two parts 21 "of the circuit segment 18, each of which is integrated in one of the two parts 11 and 12, can be assembled by fitting or partial nesting at the level of end portions 28, 28 'of suitable shapes. In addition, as shown in FIG. 1 and partially in FIGS. 2 to 8, said module 24 will also include one of the segments of conduits forming parts 23 "of a branch circuit 23 for degassing 15 and for charging the pump 17, which is part of the

  cooling and passing through a reservoir 23 'of coolant.

  According to a preferred embodiment of the invention, emerging in particular from FIGS. 1 to 9 and 11 to 14 of the appended drawings, the portions of duct 2, 2 ′ contain regulating members in the form of pivoting valves 4, 4 ′ forming part of a valve valve device 1, preferably with proportional control, intended to regulate the circulation of liquid fluid in the portions of circulation lines 3, 3 ', the flow of circulation in each portion of line 3, 3' being controlled by a corresponding pivoting valve 4, 4 ′ and the various valves 4, 4 ′ being mounted integral in rotation on the same support and control rod 4 ", the position in rotation of said rod 4" around its longitudinal axis X being determined by an actuating means 5 remote from said valves.

  In this embodiment, said valves 4 and 4 ′ are advantageously arranged in respective portions of conduits 2, 2 ′, secured to each other and with at least a part 5 ′ of the housing 5 ″ containing said actuating means 5, each portion of conduit 2; 2 'being intended to be fitted, in leaktight manner, at least partially in the end portions 6, 6'; 8, 8 'facing two segments of 35 conduits 7, 7'; 9 , 9 'forming by cooperation in axial juxtaposition the portion of circulation line 3; 3' whose flow through is controlled by the valve 4; 4 'mounted in the duct portion 2; 2' considered.

- 6

  Said device 1 is thus mounted in the portions of circulation lines 3 and 3 'by simple interlocking, as a connection insert, and without requiring an additional support or fixing means.

  Preferably, the different portions of conduit 2, 2 'and the part 5' of the housing 5 "integral with the latter are formed in one piece, for example by injection molding of thermoplastic material. As shown in Figures 9, 3 , 6 and 11 to 14 of the accompanying drawings, the end portions 6, 6 '; 7, 7' of the duct segments 7, 7 '10; 9, 9' are provided with assembly means 10 allowing contiguous juxtaposition with axial tightening of pairs 7 and 7 '; 9 and 9' of opposite duct segments intended to cooperate to each form a portion of circulation line 3; 3 ', at least said end portions 6, 6'; 8, 8 'of said duct segments 7, 7'; 9, 9 'being grouped adjacent to each other in the two structural assemblies 11 and 12,

  preferably in one piece each.

  According to an advantageous characteristic of the invention, each end portion 6, 6 ', 8, 8' of the duct segments 7, 7 '; 9, 9 'is provided with an assembly flange 10, preferably formed integrally with said end portion 6, 6', 8, 8 'concerned or with the structural assembly 11 or 12 comprising this last, and comprising sites 10 ′ for receiving assembly means (for example screw-nut assemblies) intended to connect said flange 10 with the assembly flange 10 of the end portion 6, 6 ′, 8, 8 'juxtaposed to form, by association 25 contiguous of their duct segment 7, 7', 9, 9 'respective, a portion of the corresponding circulation line 3, 3', the portions of ducts 2, 2 'forming segments of connection inserted, providing a passage without pressure loss between the segments of conduits respectively assembled together 7, 7 '; 9, 9 '.

  In order to guarantee rigid mounting and secure retention of the pipe portions 2 and 2 'in the end portions 6, 6'; 8, 8 ', it can be provided that the duct portions 2, 2' have on each of their constituent parts 2 "intended to be fitted into end portions 6, 6 '; 7, 7' corresponding segments of conduits 7, 7 '; 9, 9' 35 juxtaposed and assembled to form the line portions 3; 3 ', at least one external rib 13 and said end portions 6, 6'; 8, 8 'of said segments of conduits 7, 7 ', 9, 9' have enlarged sections relative to the current sections of said duct segments 7, 7 '; 9, 9', the depth or length of each end portion 6, 6 '; 8, 8 'being equal to the length of the corresponding constituent part 2 "of the duct portion 2, 2' intended to be fitted into it, the transverse or sectional dimensions of each end portion 6, 6 '; 8, 8 'being substantially equal, or even slightly smaller, to the peripheral dimensions of the external rib (s) 13 of the component part 2 "of said duct portion 2, 2' concerned coming into engagement and the internal section of each portion of duct 2, 2 'being identical to the 10 common internal sections of the two duct segments 7, 7'; 9, 9 'in which it is intended to be partially fitted with correspondence and continuity of the passage sections. Advantageously, each constituent part 2 "of each portion of conduit 2, 2 'has two parallel external ribs 15 13 forming between them a receiving groove 13' of an O-ring 13", some of said ribs 13 possibly extending over several constituent parts 2 ", duct segments 7 '; 9 'correspondents receiving these parts 2 "then comprising a common end portion 6', 8 'whose section is adapted to the shape and external dimensions 20 of said ribs 13 extending over several component parts 2" (see

in particular Figures 9 to 14).

  To promote the relative positioning of the parts 11 and 12, allow high force clamping between the end portions 6 and 6 '; 8 and 8 ′ and reinforce the blocking of the device 1 with flap valves between these 25 end portions, the duct portions 2, 2 ′ are provided on their external faces with radial formations 14, extending substantially perpendicular to said faces, of substantially annular shapes, and possibly in one piece with each other, providing opposite abutment surfaces 14 'to the end portions 6, 6'; 8, 8 'of the segments of 30 conduits 7, 7'; 9, 9 'juxtaposed to form the line portions 3; 3 'and being sandwiched, and if necessary clamped, between said pairs of end portions 6, 6' and 8, 8 'facing each other forming the different portions of circulation lines 3, 3'.

  By joining and merging the different radial formations 14, a plate-shaped body is obtained extending around the portions of conduits 2 and 2 ′, which provides the mutual connection of said portions and of the upper 5 ′ part of the housing 5 ″ containing the actuating means 5, in - 8

  unifying them in a single structural part, obtained for example by injection molding of thermoplastic material.

  According to a preferred embodiment of the invention, also shown in the aforementioned figures, the device 1 will comprise two portions of conduits 2, 2 'parallel, formed in one piece and each having a determined passage section, possibly different from each other , the valves 4, 4 'forming regulating members and arranged in said two portions of conduits 2, 2' having different angular orientations around the axis X of the control rod 4 ". The practical embodiment of the valves 4, 4 'of the control rod

  4 "and portions of conduits 3, 3 'forming part of the device 1 may for example correspond to one of those described in French patent application No. 00 02644 of March 1, 2000 (the longitudinal axes of the portions of conduits 3 , 3 'then not being aligned with each other), in French patent application No. 0 1 15738 of December 5, 2001 or in French patent application No. 01 16314 of December 17, 2001, all in the name of applicant.

  Preferably, the valve valve device 1 comprises, on the one hand, the regulating member 4 of an 18 ′ of the two segments 20 of circuit 18, 18 ′ in parallel with the main circuit 15 and, on the other hand, the regulating member 4 ′ of the secondary circuit 21 passing through the radiator 21 of the secondary air heater.

  According to a possible practical variant

  advantageous of the invention, represented in FIGS. 2 to 8 of the accompanying drawings, a first 11 of the two parts comprises the circulation pump 17 and its flange 17 "for mounting and fluid connection on the engine block, certain parts of the conduits forming the main circuit 15, a portion of the secondary circuit 20 passing through the radiator 20 ', as well as the end portions 6 and 8 of the segments 7 and 9.

  The second 12 of the two parts then comprises the parts

  complementary to the conduits forming the main circuit 15, other portions of the secondary circuit 20, the parts 21 "of the secondary circuit 21, the part 23" of the degassing and charging circuit 23, as well as the end portions 6 'and 8' from segments 7 'and 9'.

  Thus, said two parts 11 and 12 are assembled only at the end portions 6, 6 '; 8, 8 'of the duct segments 7, 7'; 9, 9 'by end-to-end contact with interposition of the -9 radial formations 14 of the device 1 of gate valves, thus defining an assembly plane P perpendicular to the parallel directions of circulation in the portions of circulation lines 3 and 3' forming respectively part of the parallel circuit segment 18 of the main circuit 15 and the secondary circuit 20 passing through the radiator 20 'and constituted by the juxtaposed assembly of the segments of conduits 7, 7'; 9, 9 'receiving, by partial interlocking, the corresponding constituent parts 2 "of the duct portions 2 and 2' of the device 1 of gate valves. The resulting module 24 thus has, as shown in the 10 above-mentioned figures, an elongated structure of slight width and low

  thickness extending, after assembly, along only one side of the motor.

  The casing of the pump 17 is advantageously formed by the assembly by vibration welding of two complementary parts of thermoplastic material and located at the end of the part 11 opposite the

end portions 6 and 8.

  The electric motor 26 for driving the pump 17 will preferably be mounted in the continuity of the longitudinal direction of the module 24, following the casing of this pump 17.

  As shown in Figures 2 to 8 of the accompanying drawings, and more particularly Figure 5, the part 12 may also be formed by the assembly by vibration welding of two component parts from injection molding (the cutaway of the Figure 5 shows one of the two parts, as well as the parting line).

  Furthermore, the internal circuit of the water / oil heat exchanger 25, associated with an oil filter, and in the form of a module with the latter, will be connected to the circuit segment 18 by two inlet / outlet nozzles, in being integrated into the general shape of the module 24, and a temperature sensor 27 could be provided near the passage interface of the means 16 for cooling the engine and the cylinder heads towards the

main circuit 15.

  The regulating member 22 may consist of a proportional control valve with an actuating motor 22 'mounted radially on the module 24.

  This regulating member 22 could for example be produced in the form of a flap valve as described in the requests for

  French patents mentioned above.

  Finally, the subject of the invention is also, as shown in particular in FIG. 1 of the accompanying drawings, a cooling circuit 25 of a thermal engine vehicle, essentially essentially constituted, on the one hand, by a main circuit 15 forming a circulation loop on the means 16 for cooling the cylinders and cylinder heads of the engine, integrating a circulation pump 17 in a common circuit segment 17 ′ and comprising two circuit segments 18 and 18 ′ in parallel, one of which crosses a water / oil heat exchanger 19 and the other 18 'of which incorporates a regulating member 22, on the other hand, two secondary circuits 20 and 21 10 extending in bypass on the main circuit 15, each integrating a respective regulating member 4, 4 'and passing through, one, the radiator of a main air heater dissipating the heat recovered in the surrounding environment and, the other, the radiator 21' of a secondary air heater intended to heat the passenger compartment of the vehicle and, finally, a degassing and charging branch circuit 23 passing through a reservoir 23 ′ of coolant, characterized in that it comprises a central structural module 24 as described above. In FIGS. 1 to 8, the references A to H make it possible to identify the points or zones of interfacing (entry / exit openings) between the module

  24 and the other components of the cooling circuit 25.

  Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without leaving for

  as much of the scope of protection of the invention.

- He

Claims (14)

  1) Module for a cooling circuit of an internal combustion engine vehicle, said circuit being essentially constituted, on the one hand, by a main circuit forming a circulation loop on the means for cooling the cylinders and cylinder heads of the engine, integrating a circulation pump in a common circuit segment and comprising two parallel circuit segments, in series with the common segment, one of which passes through a water / oil heat exchanger and the other of which incorporates a regulating member and, on the other part, by two secondary circuits extending in derivation on the aforementioned main circuit, each integrating a respective regulating member and passing through, one, the radiator of a main air heater dissipating the heat recovered in the surrounding medium and, l other, the radiator of a secondary air heater intended to heat the passenger compartment of the vehicle, module characterized in that it is formed by the assembly, at the level water of a joint plane (P) or of assembly zones, of two pieces (11 and 12) of thermoplastic material (s) sandwiching, with at least partial interlockings in end portions (6,6 '; 8, 8 ') of at least two segments of ducts (7, 7'; 9, 9 ') juxtaposed to form at least one corresponding circulation line (3; 3') of the cooling circuit, at least a portion of 20 conduit (2; 2 ') containing a member (4, 4') for measuring or regulating the flow in the line (3; 3 ') concerned, and in that said module (24) integrates at least the conduits forming the main circuit (15), segments of conduits forming parts (20 ", 21") of the secondary circuits (20 and 21), at least part of the circulation pump (17), and the three organs of regulation (4, 4 ', 22).   2) Module according to claim 1, characterized in that it comprises at least two portions of conduits (2, 2 ') mounted with interlocking each in the facing end portions (6 and 6'; 8 and 8 ') of two pairs of duct segments (7 and 7 '; 9 and 9') each of which 30 forms by end-to-end association, at the plane (P) or the assembly areas, of its two segments a circulation line (3; 3 ') corresponding, each portion of conduit (2, 2') comprising a member (4, 4) for regulating or measuring the flow and said portions being optionally formed together in one piece. - 12   3) Module according to any one of claims 1 and 2, characterized in that the portion or portions of conduits (2, 2 ') are formed integrally with at least part of the control means (5), actuation or control of the measuring organ (s) or   regulation (4, 4 ') and / or a protective box (5 ") containing these means.   4) Module according to any one of claims 1 to 3, characterized in that it also comprises segments of conduits forming parts (23 ") of a branch circuit (23) for degassing and charging of the pump (17), part of the cooling circuit   and passing through a reservoir (23 ') of coolant.   ) Module according to any one of claims 1 to 4, characterized in that the duct portions (2, 2 ') contain regulating members in the form of pivoting valves (4, 4') forming part of a device (1) of gate valves, preferably with proportional control, intended to regulate the circulation of liquid fluid in the portions of circulation lines (3, 3 '), the flow of circulation in each portion of line (3, 3') being controlled by a corresponding pivoting valve (4, 4 ′) and the various valves (4, 4 ′) being rotatably mounted on the same support and control rod (4 "), the position in rotation of said rod ( 4 ") around its longitudinal axis (X) being determined by an actuating means (5) offset relative to said valves.   6) Module according to claim 5, characterized in that said 25 valves (4, 4 ') are arranged in respective portions of conduits (2, 2'), integral with each other and with at least one part (5 ') of the housing (5 ") enclosing said actuating means (5), each portion of conduit (2; 2 ') being intended to be fitted, in a sealed manner, at least partially in the end portions (6, 6'; 8, 8 ') facing two 30 segments of conduits (7, 7'; 9, 9 ') forming by cooperation in axial juxtaposition the portion of circulation line (3; 3') whose through flow is controlled by the valve (4; 4 ') mounted in the portion of conduit (2; 2') considered.   7) Module according to claim 5 or 6, characterized in that the different pipe portions (2, 2 ') and the part (5') of the housing (5 ") integral with the latter are formed in one piece , for example by injection molding of thermoplastic material. - 13   8) Module according to any one of claims 1 and 2, characterized in that the end portions (6, 6 '; 7, 7') of the duct segments (7, 7 '; 9, 9') are provided with assembly means (10) allowing contiguous juxtaposition with axial clamping of the pairs (7 and 7 ';   9 and 9 ') of opposite duct segments intended to cooperate to each form a portion of circulation line (3; 3'), at least said end portions (6, 6 '; 8, 8') of said segments of conduits (7, 7 '; 9, 9') being grouped adjacent to each other in the two structural assemblies (11 and 12), preferably in one piece each.   9) Module according to any one of claims 1 to 8,   characterized in that the duct portions (2, 2 ') have, on each of their constituent parts (2 ") intended to be fitted into corresponding end portions (6, 6'; 7, 7 '), segments of conduits (7, 7 '; 9, 9') juxtaposed and assembled to form the line portions (3; 15 3 '), at least one external rib (13) and in that said end portions (6, 6 '; 8, 8') of said duct segments (7, 7 ', 9, 9') have enlarged sections compared to the current sections of said duct segments (7, 7 '; 9, 9'), the depth or length of each end portion (6, 6 '; 8, 8') being equal to the length of the corresponding component part 20 (2 ") of the portion of conduit (2, 2 ') intended to be fitted into it , the transverse or sectional dimensions of each end portion (6, 6 '; 8, 8') being substantially equal, or even slightly smaller, to the peripheral dimensions of the rib (s) other external   (13) of the constitutive part (2 ") of said duct portion (2, 2 ') 25 involved in interlocking and the internal section of each duct portion (2, 2') being identical to the current internal sections of the two duct segments (7, 7 '; 9, 9') in which it is intended to be partially fitted with correspondence and continuity of the passage sections.   10) Module according to claim 9, characterized in that each constituent part (2 ") of each duct portion (2, 2 ') has two parallel external ribs (13) forming between them a receiving groove (13') d 'an O-ring (13 "), some of said ribs (13) possibly extending over several constituent parts 35 (2"), the corresponding duct segments (7'; 9 ') receiving these parts (2 ") then comprising a common end portion (6 ', 8') of which the - 14   section is adapted to the shape and external dimensions of said ribs (13) extending over several constituent parts (2 ").   11) Module according to any one of claims 1 to 10, characterized in that the conduit portions (2, 2 ') are provided on their   external faces of radial formations (14), extending substantially perpendicular to said faces, of substantially annular shapes, and possibly in one piece with one another, providing opposite abutment surfaces (14 ′) to the end portions (6, 6 '; 8, 8') segments of conduits (7, 7 '; 9, 9') juxtaposed to form the line portions (3; 10 3 ') and being sandwiched, and if necessary clamped by pinching , between said pairs of end portions (6, 6 'and 8, 8') facing each other forming the different portions of circulation lines (3, 3 ').   12) Module according to any one of claims 1 to 11, characterized in that each end portion (6, 6 ', 8, 8') of the segments of conduits (7, 7 '; 9, 9') is provided with an assembly flange (10), preferably formed integrally with said end portion (6, 6 ', 8, 8') concerned or with the structural assembly (11 or 12) comprising the latter, and comprising sites (10 ') for receiving assembly means intended to connect said flange (10) with the assembly flange (10) of the end portion (6, 6', 8, 8 ') juxtaposed to form, by contiguous association of their respective duct segment (7, 7', 9, 9 '), a corresponding portion of circulation line (3, 3'), the portions of ducts (2, 2 ') forming inserted connecting segments, providing a pressure-free passage between the duct segments   respectively assembled together (7, 7 '; 9, 9').   13) Module according to any one of claims 1 to 12, characterized in that it comprises two portions of conduits (2, 2 ') parallel, formed in one piece and each having a determined passage section, possibly different between them, the valves (4, 4 ′) 30 forming regulating members and arranged in said two portions of conduits (2, 2 ′) having different angular orientations around the axis (X) of the control rod (4 ").   14) Module according to any one of claims 5 to 13, characterized in that the device (1) of gate valves comprises, on the one hand, the regulating member (4) of a (18 ') two circuit segments (18, 18 ') in parallel with the main circuit (15) and, on the other hand, the - 15   regulation (4 ') of the secondary circuit (21) passing through the radiator (21) of the secondary air heater.   ) Module according to any one of claims 4 to 14, characterized in that a first (11) of the two parts comprises the pump   flow (17) and its flange (17 ") for mounting and fluid connection on the engine block, certain parts of the conduits forming the main circuit (15), a portion of the secondary circuit (20) passing through the radiator (20 ') , as well as the end portions (6 and 8) of the segments (7 and 9), and in that the second (12) of the two parts comprises the complementary parts 10 of the conduits forming the main circuit (15), other parts of the secondary circuit (20), the parts (21 ") of the secondary circuit   (21), the part (23 ") of the degassing and charging circuit (23), as well as the end portions (6 'and 8') of the segments (7 'and 9'), said two pieces (11 and 12) being assembled only at the end portions 15 (6, 6 '; 8, 8') of the duct segments (7, 7 '; 9, 9') by end-to-end contact with interposition of the radial formations (14) of the valve valve device (1), thereby defying an assembly plane (P) perpendicular to the parallel directions of circulation in the portions of circulation lines (3 and 3 ') forming respectively part of the segment of 20 parallel circuit (18) of the main circuit (15) and the secondary circuit (20) passing through the radiator (20 ') and constituted by the juxtaposed assembly of the segments of conduits (7, 7'; 9, 9 ') receiving by partial interlocking the corresponding component parts (2 ") of the conduit portions (2 and 2 ') of the device (1) of gate valves.   16) Cooling circuit of a thermal engine vehicle, essentially essentially constituted, on the one hand, by a main circuit forming a circulation loop on the means for cooling the cylinders and cylinder heads of the engine, integrating a circulation pump in a segment of a common circuit and comprising two segments of circuit 30 in parallel, one of which passes through a water / oil heat exchanger and the other of which incorporates a regulating member, on the other hand, two secondary circuits extending in bypass on the circuit main, each integrating a respective regulating member and passing through, one, the radiator of a main air heater dissipating the heat recovered in the surrounding medium and, the other, the radiator of a secondary air heater intended to heat the passenger compartment of the vehicle and, finally, a degassing and charging branch circuit passing through a liquid reservoir of - 16   cooling, characterized in that it comprises a central structural module according to any one of claims 1 to 15.