FR2932555A1 - LOCKING ATMOSPHERIC EXCHANGER - Google Patents

Abstract

Atmospheric exchanger (1) with an inlet (2) and an outlet (3) for exchanger to be connected respectively to a supply line and to a heat-transfer medium discharge pipe, comprising several unitary heat exchangers (10). -21) identical plastics which are each in the form of a panel having at least one internal tubular passage (10h-10i) in a coil for the circulation of heat transfer fluid. Said internal tubular passage (10h, 10i) in serpentine has ends connected to input (2) and output (3) structures themselves connected to input and output structures of the adjacent exchanger unit modules. Locking means ensure the connection and attachment of the unitary heat exchangers (10-21) to each other.

Description

The present invention relates to an atmospheric exchanger, and more particularly to an atmospheric exchanger for use in particular with a heat pump device for space heating or air conditioning.

Document FR 2 566 107 describes an atmospheric exchanger, with

an inlet and a heat exchanger outlet respectively connected to a supply pipe and a heat transfer fluid discharge pipe, comprising a plurality of identical unitary heat exchanger units, each of which is in the form of a panel comprising at least one tubular passageway internal coil for the circulation of heat transfer fluid, said internal tubular passage in a serpentine

having projecting end pieces sealingly connected by welding to the respective end caps of the serpentine internal tubular passages of the adjacent panels.

Atmospheric exchangers are intended to be placed outdoors. In order to better withstand the external weather conditions to which they are exposed,

the unitary heat exchangers are made of plastic, being molded by extrusion blow molding. The different unitary heat exchangers are then assembled to each other in the workshop, by welding by means of a heating mirror device.

Once assembled, the exchanger of the document FR 2 566 107 is packaged and transported to its installation site.

Such an assembled exchanger is relatively fragile and bulky, which makes its transport delicate so as not to damage it. And any damage suffered by one of the exchanger unit modules renders the exchanger inoperable in its entirety.

In addition, the adaptability and the capacity of evolution of this exchanger to the particular energetic needs of each of the sites to be equipped are very limited, the exchanger being manufactured in one piece without the possibility of subsequently varying the number of unit modules exchangers according to customer request during installation or over time.

In addition, during use, the exchanger inevitably undergoes dimensional variations by expansion and shrinkage depending on the external temperature to which it is subjected. It can then occur mechanical stress concentrations at the level of the links between the different unitary modules exchangers, causing breaks and the appearance of leaks, and making

unusable the exchanger in its entirety. In this respect, it has been found that the solder joint does not provide sufficient reliability to guarantee satisfactory operation in the long term. 401 DI P.doc 2 A first problem proposed by the invention is to design an atmospheric heat exchanger for heat transfer liquid, capable of withstanding more effectively the thermal and mechanical stresses due to the variations of the external temperature and in particular to the phenomena of expansion and retraction

successive, caused by these temperature variations, inexpensive, having a large exchange surface, easy to manufacture and transport, and which can be easily and quickly adapted to the lower energy requirements of each site to equip.

According to another aspect, the invention aims at designing a heat exchanger

atmospheric comprising a plurality of unitary modules identical exchangers assembled and connected to each other in a simple, removable and interchangeable, limiting or eliminating any risk of coolant leakage.

To achieve these objects as well as others, the invention proposes a

atmospheric exchanger, with an inlet and an exchanger outlet to be connected respectively to a supply pipe and to a heat transfer fluid discharge pipe, comprising a plurality of plastic exchanger unit modules which each have a module body in the form of a panel comprising at least one internal tubular passage in a serpentine for

the circulation of the coolant, said internal serpentine tubular passage of a unit exchanger unit having ends connected in leaktight manner to the respective ends of the internal serpentine tubular passages of the adjacent exchanger unit modules in the exchanger, with connecting means and fasteners which ensure the connection and fixing of the modules

units exchanging with each other, wherein:

each exchanger unit module comprises an input structure and an output structure each having a tubular male connection structure and a tubular female connection structure, a projecting portion of which protrudes respectively on either side of the module body,

the tubular male and female connection structures are shaped such that, in a connection position, the male tubular connection structures engage by reversible axial engagement in the tubular female connection structures of the adjacent exchanger unit modules,

the protrusions of the tubular connection structures comprise radial protrusions for locking, in the connected position, retracted and releasable locking pieces are engaged on the radial protuberances of the protruding parts of adjacent tubular connection structures for oppose their dislocation.

Such an atmospheric exchanger is easy to condition and to

transport to an installation site without risk of damage as it can be brought in individually packaged and protected spare parts.

In addition, such an exchanger is easily adaptable to the particular energy needs of each site to be filled, since the unitary modules exchangers can be assembled on site and their number can easily vary. he

is indeed quite possible, thanks to the presence of connection and fixing means ensuring the connection and the fixing of the unitary modules exchangers to each other, to add or remove a number of unit modules exchangers as needed of the site to be filled.

A great saving of storage costs is also achieved, a single type of exchanger unit module for making exchangers of various sizes as needed.

The plastic constitution of this exchanger makes it insensitive to the risk of rupture resulting from expansion and removal, thanks to the deformation capacity of the material.

In addition, the particular structure of the locking connection means guarantees a satisfactory seal, thanks to a sufficient resistance to internal overpressures. The experiment has proved withstand at pressures of the order of 2500 hPa, much higher than the holding of a mirror weld (of the order of 500 hPa).

When connecting two exchanger unit modules, the tubular male and female connection structures can be connected to each other by interlocking and then locked by the reported locking pieces. Such a connection method is simple, fast and easy to perform by a technician at the installation site itself.

The connection means ensure the connection and attachment of the unitary modules exchangers to each other detachably.

This facilitates the maintenance of the heat exchanger, allowing a technician to remove one or more unit modules exchangers damaged or to maintain.

According to a first embodiment, the tubular connection structures can be in one piece with the corresponding module body. 4OFD1il'.dnc 4 In this case, there is no mirror weld to assemble a module body with inserts forming the tubular connection structures. The mechanical strength of the assembly is thus satisfactory, and allows to withstand high internal pressures of the order of 3000 hPa,

without degradation.

A disadvantage may be that the module body is then of complex shape, more difficult to mold.

According to a preferred embodiment, the tubular connection structures are each constituted by a male connection element or

female plastic, with an external connection section having radial locking protrusions and forming the projecting portion of the tubular connection structure, and with an internal fixing section with anchoring asperities and overmolded in the corresponding module body.

In this case, the overmolding ensures a mechanical strength

satisfactory, without risk of separation of the connecting element, and without risk of occurrence of a leak. At the same time, the connecting elements constitute separate parts that can each be easily made by plastic molding, whereas the module body itself, of larger volume, can be produced by extrusion blow molding of plastics material.

connecting elements constituting inserts placed in the mold before extrusion of the plastic material to produce the exchanger unit module body. After constitution, the assembly can withstand without degradation the necessary mechanical stresses, in particular the internal overpressures of the order of 3000 hPa.

The embodiment of an exchanger according to this embodiment is thus simplified, and the exchanger thus obtained has all guarantees of reliability.

According to an advantageous embodiment, the male and female connection structures have easily feasible shapes that guarantee a good seal. for example

the tubular male connection structure has, in its projecting part, an annular axial protrusion protruding axially beyond the radial locking protuberances according to a protrusion DM,

the tubular female connection structure has, in its projecting part, a flat-bottomed front recess, set back from the radial protuberances by a distance DF a little smaller than said overshoot DM,

- A front annular groove provided on the front edge of the annular axial protrusion receives an annular sealing gasket. In practice, the tubular male and female connection structures comprise means for ensuring axial clamping during locking. For example :

the tubular structures of male and female connection each comprise the same number of radial excrescences able to press against each other in a bearing face in the connection position,

the radial protuberances comprise, opposite the bearing face, a locking face with clamping ramps,

the locking is ensured by a locking ring, engaged around the projecting portions of the tubular connection structures, comprising inner insertion housings able to allow, in an angular insertion position, the axial engagement of the locking ring. on the projecting portions of the tubular structures beyond the radial locking protrusions, and having interlocking interlocking housings providing, by rotation of the locking ring to an angular locking position, engagement of side walls of the locking ring behind the clamping ramps and the locking faces of the radial protuberances.

The axial clamping ensures a good sealing of the connection after mounting, by compressing the annular sealing gasket, which makes it possible to hold the internal overpressures that can occur during use, without the appearance of leaks.

During assembly, the exchanger unit modules must be held together, away from the ground or support plane. In practice, it can advantageously be provided that the exchanger comprises support means comprising two support posts with feet and on which rests at least one spar on which are threaded and rest several connected exchange unit modules. One advantage is that the same support means can receive a variable number of exchanger unit modules, which facilitates the modularity.

For the conduction of fluids, it is necessary to close some end ports. For this, one can advantageously provide a shutter with radial protuberances, adapted to close the orifice of a male connection structure being locked by the locking piece reported.

Similarly, to facilitate the connection to external pipes, it is advantageous to provide a connection piece with radial protrusions, adapted to be locked on a tubular male connection structure being locked by a locking piece reported. 4DFDEP.dca 6 According to another aspect of the invention, there is provided a unit exchanger unit to form an exchanger as defined above, the exchanger unit module comprising:

a module body, of plastic material, in the form of a panel, with two internal tubular passages and with an input structure and an output structure,

the input structure comprising a tubular female connection structure and a tubular male connection structure opposite to each other and a protruding portion of which extends respectively over a first panel face and a second panel face,

- The output structure comprising a female connection tubular structure and a tubular male connecting structure opposite to each other and a protruding portion projecting respectively on the first panel face and the second panel face.

Likewise, according to another aspect of the invention, there is provided a locking ring for constituting an exchanger as defined above, the locking ring comprising a ring body with insertion recesses and interlocking interiors. .

The added character of the female or male tubular connection elements makes it possible to simplify the molds, allowing the extrusion-blow molding of the unitary heat exchanger units, avoiding forms with complicated undercuts to be made.

Preferably, it can be provided that the annular sealing gasket engaged between the tubular inserts male and female connection is preferably an O-ring. The latter can be housed in a front groove of the tubular insert element female connection, or in a front groove of the tubular insert male connection element.

Other objects, features and advantages of the present invention will become apparent from the following description of particular embodiments, with reference to the accompanying figures, in which:

FIG. 1 is a perspective view of an atmospheric exchanger according to one embodiment of the invention;

FIG. 2 is a perspective view of a unitary exchanger module according to a first face; FIG. 3 is a perspective view of the unitary exchanger module of FIG. 2, viewed along its opposite face; FIG. 4 is a front view of a male connecting member for constituting a tubular male connection structure according to one embodiment of the present invention; FIG. 5 is a side view of FIG. male connection element according to Figure 4; - Figure 6 is a sectional view AA of Figure 4; - Figures 7 and 8 illustrate, in perspective, the two faces of the male connecting element of Figures 4 to 6; FIG. 9 is a front view of a female connection element intended to constitute a tubular female connection structure according to one embodiment of the present invention; FIG. 10 is a side view of the female connection element; according to Figure 9; - Figure 11 is a sectional view B-B of Figure 9; - Figures 12 and 13 illustrate in perspective the two faces of the female connecting member of Figures 9 to 11; FIG. 14 is a front view of a locking ring according to an embodiment of the present invention; FIG. 15 is a C-C section of the ring of FIG. 14; FIG. 16 is a D-D section of the ring of FIG. 14; FIG. 17 is a section E-E of the ring of FIG. 15; FIG. 18 is a perspective view of the ring of the preceding figures; - Figures 19 and 20 illustrate in perspective the two main faces of a shutter according to an embodiment of the present invention; - Figures 21 and 22 illustrate in perspective a connecting end according to one embodiment of the invention; and FIG. 23 is a perspective view of an atmospheric exchanger according to an embodiment with end flanges. In the embodiment illustrated in FIG. 1, an atmospheric exchanger 1 is formed of the assembly of several exchanger unit modules, designated respectively by the references 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 and 21, stacked one after the other, and hydraulically connected to each other between an inlet 2 and an outlet 3. The inlet 2 is intended to be connected to an inlet supply pipe , while the outlet 3 is intended to be connected to a discharge pipe. The "input" and "output" designations are only intended to distinguish the two fluid passage structures from one another. In fact, during use, 4OFD1iP.dac 8 may, depending on the needs, introduce the heat transfer fluid either through the inlet 2 or through the outlet 3. In the embodiment illustrated, the unitary heat exchangers 10-21 are identical and each have a module body 111 in the form of a panel as illustrated in FIGS. 2 and 3 in relation to the exchanger unit module 11. FIG. 2 illustrates a first face 11a of the exchanger unit module 11, while FIG. 3 illustrates the second face 11b of this same unitary exchanger module 11. The exchanger unit module 11 is a generally rectangular panel, with its large dimension intended to be positioned vertically. The unitary heat exchanger unit 11 comprises a module body 111, with an input structure Il c arranged substantially in the middle of the small upper side, and with an output structure 11d disposed along the lower short side and in a position slightly offset relative to in the middle of the small side.

Vertical stiffening reinforcements 11e, 11e and 11g are made along the long vertical sides and in the middle position, on both faces 11a and 11b. According to one possibility, the stiffening reinforcements are made by blowing the plastic material to give it a tubular shape. According to another possibility, this aluminum tubular reinforcing tube is engaged in this tubular plastic structure, conferring greater rectitude and rigidity on the unitary exchanger module 11. The input structure Il c and the output structure 1 ld are hydraulically connected to one another by two internal tubular passages in parallel, namely a first internal tubular passage Il h and a second internal tubular passage 11i, both formed in coils on either side of the vertical stiffening reinforcement 11f. An assembly light 11j, with a square section, is arranged in a median position below the input structure 11c, and allows the passage of a spar 87 (FIG. 1) making it possible to support all the unitary modules. exchangers 10-21 for forming the exchanger 1. The inlet structure 11 c is formed of two tubular connection structures, respectively 111 c in Figure 2 and 211c in Figure 3, placed in opposition to one of the other, hydraulically connected to each other and to the two internal tubular passages 11h and 11i, and each having a projecting portion protruding from one or other of the faces 11a and 11b. Similarly, the outlet structure 11 d is formed of two tubular connection structures, respectively 11d and 211d, placed in opposition 4ofDEP.doc 9 of each other, hydraulically connected to each other and to the two internal tubular passages 11 h and 11 i, and each having a projecting portion protruding from one or the other of the faces 11 a and 11 b of the panel.

The two tubular connecting structures 111c and 111d which

partially exceed the first face 11a of the panel are female type connection structures, while the two connecting tubular structures 211c and 211d which partially extend beyond the second face 11b of the panel are tubular connection structures of the male type .

Preferably, all the exchanger unit modules 10-21 have the

same form. For example, in FIG. 1, it is understood that the first visible panel 10 comprises reinforcing reinforcements, and two internal tubular passages 10h and 10i

FIGS. 4 to 8, which illustrate a male connection element 30 for constituting the male connection structures 211c and 211d, are now considered.

The male connecting element 30, illustrated in the figures, is a generally tubular element with a central passage 31 passing along an axis 1-1 for the passage of the coolant, and with a peripheral structure for fixing and connecting -locking. In FIGS. 5 and 6, there is a distinction

of the axis 1-1, an external connection section 32 and an internal fixing section 33.

The inner fixing section 33 is shaped to ensure a mechanically resistant attachment to the body of the corresponding exchanger unit module. In the embodiment illustrated, the internal fastening section 33

comprises an intermediate flap 34, an annular groove 35, and a retaining flange 36 intended to be overmoulded in the material forming the module body 111. The retaining flange 36 preferably has a diameter little smaller than the diameter of the intermediate flange 34, and it is ribbed on its front face to facilitate the realization of the male connecting member 30 and to achieve a

anti-rotation anchorage in the material of the module body 111.

In the external connection-locking section 32, four radial protuberances 37a, 37b, 37c and 37d are uniformly distributed at the periphery of the external connection-locking section 32, and developing radially as illustrated in the figures.

Between the intermediate flange 34 and the radial protuberances 37a-37d, the connecting element 30 comprises an annular groove 38, with stiffening ribs for stiffening the radial protuberances 37a-37d. 4OFDEP.doc 10 As seen in FIGS. 5 and 6, the male connection element 30 has, in its external connection-locking section 32, an annular axial protrusion 39 which protrudes axially beyond the radial locking protuberances 37a-37d according to a DM overflow.

In addition, the annular axial protrusion 39 includes a front annular groove 39a on its front edge to receive an annular seal 130.

FIGS. 9 to 13, which illustrate a female connection element 40 for producing the female connection structures 111c and 111d, are now considered.

The female connection element 40 has a generally tubular shape with an axial passage 41. Its external structure is similar to that of the male connection element 30, and there is again an external connection-locking section 42, an inner fixing section 43, a flange

Intermediate 44, a retaining flange 46 and an annular groove 45.

The inner fixing section 43 is intended to be overmoulded in the material constituting the body of the exchanger unit module, ensuring a mechanically resistant attachment.

The external connection-locking section 42 has

Radial locking projections 47a, 47b, 47c and 47d, shaped to correspond to the radial locking protrusions 37a-37d of the male connecting element 30.

The female connection element 40 has, in its external connection-locking section 42, a flat-bottomed front recess 49,

Removing the radial protuberances 47a-47d by a distance DF slightly less than the overflow DM.

The radial protuberances 37a-37d of the male connecting element and the radial protuberances 47a-47d of the female connection element have substantially the same shapes, with respective bearing end faces.

30 generally flat and bearing against each other in the assembly position, and each having, opposite the bearing face, a locking face with clamping ramps.

In this respect, for example, the radial protuberances 37b and 47b in FIGS. 5 and 10, where the support surface 137b or 147b is distinguished from the

Opposite locking face 237b or 247b with side clamping ramps 337b and 437b, or respectively 347b and 447b. 5401, I] EP.doc are now considered Figures 14 to 18, which illustrate a locking ring 50 to ensure the locking of tubular male and female connection structures, two by two. The locking ring 50 is intended to be engaged around the projecting portions 37a-37d and 47-47d of two coupled tubular connection structures, and for this purpose includes insertion recesses 51a, 51b, 51c and 51d able to allow, in an angular position of introduction of the locking ring 50, the axial engagement of the locking ring 50 on the projecting portions of the tubular connection structures, beyond the radial locking protrusions 37a-37d or 47a-47d. In other words, the housings 51a-51d are shaped so as to allow the passage of the radial locking protrusions 37a-37d and 47a-47d during the axial displacement of the locking ring 50 on one or the other of the tubular structures of FIG. male or female connection. The locking ring 50 further comprises interlocking interlocking inner housing 52a, 52b, 52c and 52d shaped to allow rotation of the locking ring 50 about the radial locking protrusions 37a-37d or 47a-47d. , which enter dwellings 52a-52d. When the locking ring 50 is in the locking angular position, the radial locking protuberances 37a-37d or 47a-47d are engaged in the locking housings 52a-52d, the side walls of which bear against the locking faces of said protuberances radial locking. If we consider for example the housing 52b in Figure 18, it comprises two side walls 152b and 252b, the axial spacing is chosen substantially equal to the cumulative thickness of a radial protrusion element locking male connection and a radial protrusion locking a female element. In this way, when a male connection element and a female connection element are pressed against each other with a locking ring 50 engaged, the lateral faces 152b and 252b force the corresponding radial locking protuberances to bear against each other. against each other, to ensure a mechanically resistant maintenance of the two tubular male and female connection structures. The locking is obtained simply by a pivoting of the locking ring 50 in the direction illustrated by the arrow 53 (FIG. 18), whereas the unlocking can be obtained by a reverse rotation of the locking ring 50. a tubular structure of male connection can be obtained by the adaptation of a shutter 60 as illustrated in Figures 19 and 20. 4OFDEP.dnc 12 The shutter 60 is a solid flange, with four radial protrusions lock 67a 67d, shaped to cooperate with corresponding radial protuberances of the tubular male connection structure and with a locking ring 50.

As can be seen in the figures, positioning pins 70 are also provided on the shutter 60, which protrude axially from the end face of the connection part to engage in a corresponding recess of the opposite connecting element and block the axial rotations of the shutter 60 during locking.

The male and female connection members 40 may advantageously be made by molding high density polyethylene, preferably with a fiberglass load. The module body 111 can, for its part, be produced by polyethylene injection blow molding, guaranteeing compatibility with the material of the connecting elements 30 and 40 to achieve a good weld. The locking ring can be made by molding a plastic material such as polyoxymethylene, guaranteeing good mechanical properties and good sliding capacity. Alternatively, one can consider using other plastics, chosen according to their molding properties, extrusion blow molding, deformability, resistance to mechanical stresses and external aggression. It is understood that the assembly of an exchanger 1 according to the invention does not require any particular tool, the drive of the locking ring can be provided by hand or with a claw key.

Globally, the heat exchanger 1 may comprise support means comprising two carrying uprights 81 and 82, each having a foot 83 or 84, and connected by a spar 87 with a square section on which the unitary heat exchangers 10-21 are threaded. , the spar crossing the lights square section 11j.

As shown in FIG. 23, the heat exchanger 1 may also comprise the end caps 85 and 86, attached to the respective uprights 81 and 82, and which obscure the main external faces of the unitary heat exchanger units 10 and 21 with flaps. respectively 85a, 85b, 86a and 86b. The locking means may also be adapted for fixing a connecting piece 90 as illustrated in FIGS. 21 and 22: the connecting piece 90 comprises an outer tubular part 91 and a connecting part 92 with radial protuberances 92a-92d. The portion 401, DEP.doc 13 connection is shaped like that of the male connection elements 30, and can thus cooperate with the female connection elements and with a locking ring 50 for its attachment. The outer connecting portion 91 is suitably shaped to receive an inlet or outlet pipe. The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof within the scope of the claims below.

Claims (1)

CLAIMS1 - Atmospheric exchanger (1), with an inlet (2) and an outlet (3) for exchanger to be connected respectively to a supply line and a heat transfer fluid discharge pipe, comprising several unitary modules plastic exchangers (10-21) each having a module body (111) in the form of a panel having at least one internal tubular passage (11 h, 11i) in a serpentine for the circulation of the coolant, said tubular passage internal coil (11 h, 11 i) of a unit exchanger unit (11) having ends sealingly connected to the respective ends of the internal tubular serpentine passages of the adjacent exchanger unit modules (10, 12) in the exchanger (1); ), with connection and fixing means which connect and fix the unitary heat exchangers (10-21) to each other, characterized in that - each unitary heat exchanger module (10-21) comprises an inlet structure (11c) and an outlet structure (11d) each having a tubular male connection structure (211c, 211d) and a tubular female connection structure (111c, 111d), one of which protruding portion protruding respectively on either side of the module body (111), - the male (211c, 211d) and female (111c, 111d) tubular connection structures are shaped so that, in a connection position, the male tubular connection structures (211c, 211d) engage by reversible axial engagement in the tubular female connection structures (111c, 111d) of the adjacent exchanger unit modules, - the projecting portions of the tubular connection structures (111c, 211c, 111d). , 211 d) comprise radial locking protrusions (37a-37d; 47a-47d), - in the connection position, releasable and releasable locking pieces (50) engage the radial protuberances (37a-37d; 47a-47d) of the projecting portions of adjacent tubular connection structures to oppose each other. to their dislocation. 2 - exchanger (1) according to claim 1, characterized in that the tubular connection structures (111c, 1 i 1 d, 211c, 211d) are in one piece with the corresponding module body (111). 3 - exchanger (1) according to claim 1, characterized in that the tubular connection structures (111c, 111d, 211c, 211d) each consist of a male connection element (30) or female (40) plastic with an outer connecting section (32, 42) having radial locking profiles (37a-37d; 47a-47d) and forming the projecting portion of the tubular connecting structure (111c, 111d, 211c, 211d) , and with an internal fastening section (33, 43) with anchoring asperities and overmolded in the corresponding module body (111). 4 - exchanger (1) according to any one of claims 1 to 3, characterized in that: the male connection tubular structure (211c, 211d) has, in its projecting part, an annular axial protrusion (39) protruding axially beyond the radial locking protuberances (37a-37d) according to a protrusion (DM), the tubular female connection structure (111c, 111d) has, in its projecting part, a flat-bottomed front recess (49), recessed from radial protuberances (47a-47d) by a distance (DF) slightly less than said overshoot (DM), - a front annular groove (39a) provided on the front edge of the annular axial protrusion (39) receives a joint annular seal (130). 5 - exchanger (1) according to any one of claims 1 to 4, characterized in that: - the tubular male connection structures (211c, 211d) and female (111c, 111 d) each comprise the same number of excrescences radial plates (37a-37d, 47a-47d) adapted to be pressed against each other in a bearing face (137b) in the connecting position, the radial projections (37a-37d; 47a-47d) comprise, opposite the bearing face (137b), a locking face (2376) with clamping ramps (337b, 437b), the locking is ensured by a locking ring (50) engaged around the projecting parts of the structures tubular connection, having inner insertion housings (51a-51d) adapted to allow, in an angular insertion position, the axial engagement of the locking ring (50) on the projecting portions of the tubular structures beyond radial protrusions locking, and comprising int housing locking rings (52a-52d) ensuring, by rotation of the locking ring (50) to an angular locking position, the engagement of side walls (152b, 252b) of the locking ring (50) behind the ramps; clamping and the locking faces (237b) of the radial protuberances (37a-37d; 47a-47d). 6. - exchanger according to any one of claims 1 to 5, characterized in that it comprises support means comprising two support posts (81, 82) feet and on which rests at least one spar 4DEF.DOC 16 (87) on which are threaded and rest several interconnected unit modules (10-21) connected. 7 - exchanger according to any one of claims 1 to 6, characterized in that it comprises a shutter (60) with radial protuberances (67a-67d), able to close the orifice of a tubular male connection structure ( 211c, 211d) being locked by the insert locking member (50). 8 - exchanger according to any one of claims 1 to 7, characterized in that it comprises a connecting piece (90) with radial excrescences (92a-92d), adapted to be locked on a tubular male connection structure (211c 211d) being locked by an insert locking member (50). 9 - unit exchanger unit for forming an exchanger (1) according to any one of claims 1 to 8, characterized in that it comprises: - a module body (111), in plastic material, in the form of a panel, with two internal tubular passages (11h, 11i) and with an input structure (11c) and an output structure (11d), - the input structure (11c) comprising a tubular female connection structure (111c) and a male connecting tubular structure (211c) opposed to each other and having a protruding portion protruding respectively on a first panel face (11a) and a second panel face (11b), - the structure of outlet (11d) having a tubular female connecting structure (111d) and a tubular male connecting structure (211d) opposite to each other and having a projection protruding respectively on the first panel face (11a) and on the second panel face (11b). Locking ring (50) for constituting an exchanger according to any one of claims 1 to 8, characterized in that it comprises a ring body with insertion recesses (51a-51d) and inner housings of lock (52a-52d).