FR2782379A1 - HEAT EXCHANGER - Google Patents

Abstract

The radiator-type heat exchanger for central heating installation comprises several horizontal radiant tubular elements (1) connected to a vertical water supply manifold (2) and to a vertical water collection manifold (3). One of the collectors (2) (3) consists of a first tubular duct (8) and a second tubular duct (9) hydraulically connected to each other at the top by a connector (10) . The second duct (9) is connected to the radiant elements (1) and is closed in the lower part and the first is connected from a connecting end (13) to one of the two tappings (4), (6) by the intermediate of a flexible (14), (16) with end fitting (15), (17). The other manifold consists of at least one tubular duct hydraulically connected from a connection end piece (13) in hydraulic connection with its lower end, to the other tap by means of a second flexible hose with end connection.

Description

HEAT EXCHANGER.

  The present invention relates to a heat exchanger of the radiator type for central heating installation comprising two vertical collectors to which are hydraulically connected a plurality of radiant, tubular, regularly spaced elements preferably extending between said collectors, perpendicular to the latter. The state of the art of radiators of the aforementioned type is known. Known radiators are intended by their manifolds to be connected by means of a long tap and a short tap to the hot water inlet pipe and to the water return pipe that the installation comprises. central heating. The long nozzle is connected by a suitable upper connector to the upper end of the relevant collector while the short nozzle, by an appropriate lower connector, is connected to the lower end of the other collector. In this way, the circulation of water in the radiator is established from one collector to another, schematically along a diagonal. This avoids any short circuit in the radiator and therefore any loss of efficiency. A flow adjustment valve is placed on the water circulation circuit at the upper connection. By operating this valve, it is possible to interrupt the hydraulic circuit in the radiator or to adjust the flow rate of the hot water current introduced into the radiator. Conventionally, the two tappings are made by rigid metal pipes of relatively large section to minimize pressure drops. The installation of the radiator with this type of installation poses several problems. The two nozzles determine once and for all the position of the radiator and the latter cannot be moved afterwards for, for example, a better adaptation of its position to new environmental conditions. In addition, with this type of installation, it is no longer possible after establishing the two nozzles to simply reverse the position of the regulating valve, for example, to better adapt to these new conditions. Indeed, this change of position supposes, if one wishes to keep the tap in the upstream position relative to the radiator, a change in the direction of water circulation in the latter and consequently, the replacement of the existing long tap with a short nozzle and replacement of the existing short nozzle with a long nozzle. We can therefore see that this simple change of position operation results in an intervention

particularly tedious.

  In addition, the value of the difference between the tap connections must be relatively precise to establish without difficulty the connection with the two collectors. Such precision proves to be incompatible with the nature of the work to be carried out to carry out the taps and, in most cases, the plumber is forced to deform them to make the connections. This difficulty in connection can be further amplified by a poor positioning of the radiator suspension elements on the wall. Indeed, these elements determine a second position for the radiator, which can be offset by

  compared to that determined by the nozzles.

  So we see that the installation of a radiator, which is in itself a technically simple operation, is

  found delayed by difficulties due to dimensional inaccuracies difficult to avoid.

  The aim of the present invention is to overcome the drawbacks mentioned above, not by increasing the degree of dimensional precision in the production of the tappings and in the installation of the suspension elements but by implementing a new type of radiator of a simplified installation, without the need for precise positioning on the one hand of the two nozzles relative to the other and relative to the radiator support elements, and on the other hand

  part of the suspension elements relative to each other and to the radiator.

  Another object of the invention is the implementation of a radiator whose position after

  stitching and after installation can be changed.

  Another object of the present invention is the implementation of a radiator which no longer requires for its connection to the central heating circuit, a long tap and a short tap but two short taps, technically simpler to perform and more economical, which can also be hidden by the radiator which greatly improves

  the aesthetic aspect of the installation.

  Finally, another object of the present invention is a radiator whose position of the regulating valve can be inverted without, however, requiring intervention at the level of the

two taps.

  To this end, the heat exchanger according to the invention, of the radiator type for central heating installation comprising several horizontal radiant tubular elements hydraulically connected by one of their ends to a vertical water supply manifold and by the other. to a vertical water recovery collector, the water supply collector being hydraulically connected by a supply nozzle to the hot water supply line of the installation and the recovery collector via '' a return connection to the water return line, so that the circulation of hot water through the radiant tubular elements can be established from the supply manifold to the recovery collector and the heat is transferred to the surrounding medium by thermal transfer through the wall of the radiant tubular elements and the circulation of water in the radiator being established schematically salt on a diagonal is essentially characterized in that: - one of the collectors or first collector consists of a first tubular conduit and a second tubular conduit hydraulically connected to each other in the upper part by an upper connector coming to cover the upper end of each of the conduits, - the second conduit is hydraulically connected to the radiant tubular elements and is closed at the bottom and the first conduit is intended to be hydraulically connected from a connection endpiece in hydraulic relation with its lower end , to one of the two taps via a hose with end fitting, - and the other manifold or second manifold is made up of at least one tubular conduit hydraulically connected to the radiant tubular elements, said conduit being intended to be hydraulically connected from a connection nozzle in hydraulic relation with its end

  lower, to the other connection via a second hose with terminal connection.

  To connect the radiator to the central heating installation, two short taps are sufficient. The use of flexible hoses to connect the two manifolds to the central heating circuit now allows the radiator to change position and facilitates the realization of these tappings since no dimensional precision is required both for the position of the tappings in relation to the other than in relation to the radiator suspension elements. In addition, the use of hoses allows the connection of the collectors to the two nozzles to be easily reversed in order to change the direction of circulation of the water in the radiator. Preferably the first collector constitutes the supply collector and is connected by the connection end corresponding to the supply connection, the second collector being connected by the connection end corresponding to the return connection and

  constitutes the recovery collector.

  According to another characteristic of the invention, the two conduits of the first manifold are both connected to a hydraulic distribution valve comprising a valve body into which is bored a chamber into which open three through holes made in the valve body, the first and second drilling being in relation with the lower end of the two conduits and the other with the connection end piece, said valve comprising in the chamber a movable element movable between a first position according to which on the one hand, the communication hydraulic between the first tubular conduit and the connection nozzle is ensured and on the other hand the hydraulic communication between the second tubular conduit and the connection nozzle is interrupted, and a second position according to which, on the one hand, the communication hydraulic between the first tubular conduit and the connecting piece is interrupted and on the other hand the common hydraulic ication between the second

  tubular conduit and the connecting piece is established.

  The movable element of the valve will preferably be placed in the first position when the first collector is to be connected to the supply nozzle and therefore constitutes the supply collector. On the other hand, when this manifold is intended to be connected to the return nozzle and therefore constitute the recovery manifold, the movable element of the valve will preferably be placed in the second position to minimize the pressure losses in

  avoiding the return of water through the first conduit.

  According to another characteristic of the invention, the upper connection of the first manifold is associated with a globe valve, intended for adjusting the water flow rate between the first and the second conduit, the valve of said valve being able to be arranged in a position of interruption of

  water circulation between the first and the second conduit.

  It is sometimes necessary to reverse the position of the valve. Thus according to another characteristic of the invention, the second manifold also consists of a first tubular conduit and a second tubular conduit hydraulically connected to each other in the upper part by an upper connector coming to cap the end. upper of each of the conduits, the second conduit being hydraulically connected to the radiant tubular elements and the two conduits of the second manifold being both connected to a hydraulic distribution valve comprising a valve body in which a chamber is bored into which open three through bores formed in the valve body, the first and second bores being in relation to the lower end of the two conduits and the other with the connection end piece, said valve comprising in the chamber a movable element movable between a first position according to which on the one hand the hydraulic communication between the first conduit it tubular and the connecting piece is ensured and on the other hand the hydraulic communication between the second tubular duct and the connecting piece is interrupted, and a second position according to which on the one hand the hydraulic communication between the first tubular duct and the connection end piece is interrupted and on the other hand the hydraulic communication between the second tubular conduit and the connection end piece is established, the upper connection of each manifold being designed to receive either a globe valve or a plug

  the mouth of the globe valve housing.

  The upper connector, according to another aspect of the invention, consists of a body in which is formed a cylindrical chamber, open on one of the faces of the body, into which chamber open first and second through bores intended for be brought and kept in correspondence respectively with the first tubular conduit and the second tubular conduit of the manifold, a seat for a valve being formed in the chamber between the mouths of the two through holes, said cylindrical chamber being further provided, from its mouth on the face of the body, a thread intended to receive in screwing, according

  in this case, the threaded end of the blanking plug or the threaded part of an adjustment valve.

  Thus each collector can receive in turn according to the need of the moment either the

  adjustment valve or the shutter plug.

  Furthermore, whether or not it is fitted with a regulating valve, the collector can be connected to the supply connection, the other collector being, of course, connected to the return connection. We therefore see all the flexibility of use conferred by the previously defined provisions and in particular those of the valve. Several configurations are therefore possible, but it is desirable for optimal use that the water circuit in the radiator, whatever its direction, be established for the manifold comprising the regulating valve, first in one of its two conduits then in the other, and for the other

  manifold only in the second conduit to minimize pressure losses.

  By operating the movable element of the valve, it is useful to be able to isolate the two pipes of the manifold from the corresponding connection end piece. Thus according to another aspect of the invention, the movable element of the valve is positionable by displacement in the chamber of the valve body, in a completely closed position according to which no hydraulic communication is established between the end piece connection and the first and second holes of the valve body. Thus the two conduits of the corresponding collector are isolated from the corresponding tapping. The radiator can therefore be hydraulically isolated from the two nozzles by placing

  the movable element of each valve according to the third position.

  It is desirable to be able to simultaneously drain the two pipes of the collector. To this end, the movable element of the valve, by displacement in the chamber of the valve body, can be positioned in a drain position according to which the first and second bores of the

  valve bodies are simultaneously hydraulically connected to the connection piece.

  The positions described above, which the movable element of the valve can occupy, are as it should be stable positions which cannot be modified by the effect of the pressure of the water in the valve. The movable element can only be changed in position by

  the action of an appropriate tool operated by the user.

  The valve, insofar as its movable element can occupy at least the first two positions, can be of any known type, but for the sake of simplification of manufacture and use the or each valve, according to another aspect of the invention is of the key type and consists of a body in which is formed a cylindrical chamber into which open a first through hole and a second through hole both in the wall of the body, the longitudinal axes of said holes being contained in the same geometric plane containing the longitudinal central geometric axis of the chamber, and said holes being positioned respectively opposite the first tubular conduit and the second tubular conduit of the associated manifold, said valve body being provided in the axis of the chamber cylindrical with a through hole in which engages the connection end-piece and the valve key consisting of an envelope tubular ppe of cylindrical shape delimiting a hollow cylindrical internal volume, said casing comprising according to one of its two ends a water passage opening arranged in relation to the connection end piece and at the other end a watertight partition, d closing the volume which it delimits, the tubular wall of the key further comprising, along a first straight section located in the axis of the first hole passing through the wall of the body and along a second straight section located in the axis of the second through-hole through the wall of the body, respectively at least a first radial through-hole and a second through-radial hole, the said first and second radial through-holes being angularly offset relative to each other by an angular value different from the value of the angular offset which may exist between the first drilling and the second drilling of the body and sufficient so that when one of the said p key holes are in partial or total communication with the corresponding through-hole in the body to ensure hydraulic communication between the corresponding tubular conduit and the connection piece, the other is completely free from the corresponding hole in the wall of the valve body to prevent any hydraulic communication between the other tubular conduit of the

  associated collector and connection end piece.

  By rotation of the key in the chamber, it is easy to cross the two positions previously mentioned and to bring said key into the third position according to which the wall

  tubular that it forms, completely closes the first and second drilling of the valve body.

  For the sake of simplification, the longitudinal axes of the first and second holes in the valve body are contained in the same geometric plane containing the geometric axis

longitudinal median of the chamber.

  To ensure the emptying of the two tubular conduits of the manifold, the valve key along the straight section containing the axis of the first radial through bore, has a third through radial bore and along the straight section containing the axis of the second through radial bore , a fourth through radial bore, the value of the angular difference between the third and fourth through bores being equal to the value of the angular difference between the first and second through bores of the valve body. In this way, the third and fourth radial through holes, by rotation of the key, can be brought simultaneously opposite the first and second through holes of the valve body. The value of the difference between the first and second through holes of the body being zero, the third and fourth through radial holes of the key will be contained, each by their median longitudinal axis, in a common geometric plane, containing the median longitudinal axis

  of the key and the median longitudinal axis of the chamber.

  For the sake of simplification of use, the four positions that the valve key can occupy are offset from one to the other by ninety degrees. Thus according to another aspect of the invention, the first and third through radial holes of the key are diametrically opposite while the second and fourth through radial holes

  are offset by ninety degrees.

  For the operation of the rotating key, the end closure wall is provided with an external imprint, which is intended to receive in form fitting for the transmission of a rotational movement, a form imprint complementary provided in

  end of an operating tool.

  According to another characteristic of the invention, the radiant tubular elements are arranged one above the other at a constant interval. Thus these tubular elements determine two by two a heat exchange channel in which the air is led to circulate and

  to warm up before being distributed in the enclosure.

  In addition, in order to increase the exchange surface, each radiant tubular element, along its straight section, is longer than wide and has, along its straight section, a large median axis in the direction of the length of its section and a minor axis. median across its width, said

  element being arranged by the long axis of its cross section parallel to the axis of the channel formed.

  To facilitate the circulation of air in the channels formed, each radiant element, according to another aspect of the invention, is positioned so that the major axis of its cross section is inclined to the horizontal. Preferably, according to another characteristic of the invention, the major axis of the cross section of each radiant element is inclined from the rear of the radiator (wall side) upwards and the front of the radiator (enclosure side). Thus the circulation of air through

  channels formed, established from the back and bottom to the front and top.

  In order to increase the exchange surface, each radiant element along that of its equatorial planes containing the major axis of its cross section has externally at least one radiant wing. In order to further increase the exchange surface, each radiant tubular element according to another aspect of the invention, comprises two radiant, external, opposite wings,

  i.e. an upper front wing and a lower rear wing.

  Each heat exchange channel is therefore defined by two rear lower wings,

  two radiant elements and two upper front wings.

  Other advantages and characteristics of the invention will appear on reading the

  description of a preferred embodiment given by way of non-limiting example in se

  referring to the attached drawings in which: - Figure 1 is a schematic front view of a radiator according to the invention; - Figure 2 is a front view of a radiator according to the preferred embodiment; Figure 3 is a half sectional view of the radiator along a plane containing the longitudinal axes of the radiating elements; - Figure 4 is a sectional view of the radiator along the line AA in Figure 3; - Figure 5 is a cross section of a radiant element; - Figure 6 is a cross section of the upper radiant element; - Figure 7 is a cross section of the lower radiant element; - Figure 8 is a cross section of a manifold at the connection of one of the radiant elements; - Figure 9 is a front view of the seal interposed at the connection of each radiant element to the manifold; - Figure 10 is a longitudinal sectional view of a valve; - Figure 11 is a cross-sectional view of a valve along line BB of Figure 10; - Figure 12 is a cross-sectional view of a valve along the line CC of Figure 10; - Figure 13 is a longitudinal sectional view of an upper connector fitted with a globe valve; - Figure 14 is a longitudinal sectional view of an upper connector fitted with a plug - Figure 15A is an exploded perspective view of an adjustable support in position; - Figure 15B is a perspective view of an adjustable support in position, equipped with the end fitting of one of the hoses;

  - Figure 16 shows in section a suspension hook.

  - Figure 17 is a front view of a suspension hook.

  As shown, the radiator according to the invention for, for example, a central heating installation, is fixed by suspension hooks 46 to one of the walls of an enclosure and comprises several horizontal radiant tubular elements 1, of oblong cross section arranged one above the other at constant intervals. These elements are hydraulically connected at one end to a vertical water supply manifold 2 and at the other end to a vertical water recovery manifold 3. As can be seen in Figure 1, the water collector water supply 2 is hydraulically connected by a supply nozzle 4 to the pipe 5 for supplying hot water to the installation and the collector of

  recovery 3 by means of a return nozzle 6 to the water return pipe 7.

  Each radiant element, by the long axis of its cross section, is inclined upwards from the rear of the radiator and forms with each contiguous radiant element a channel in which air is caused to circulate from the rear end opposite the wall toward the front end facing the enclosure and to warm up. To increase the length of this channel and therefore the residence time of the air to be heated, each radiant element, according to an equatorial geometric plane containing the long axis of its cross section, is provided with a wing before the upper and a rear wing 1 b lower. Furthermore, this arrangement gives the channel a sinuous appearance.

  further conducive to increasing the residence time of the air in the channel.

  According to the preferred embodiment, the upper radiant tubular element is provided with a horizontal wing 1 c forming backwards, said horizontal wing, from its horizontal rear edge being extended downwards by a support wing ld intended to come to rest by its horizontal lower edge in the hanging hooks 46 fixed to the wall. Preferably

  the horizontal wing lc is rooted at the horizontal upper edge of the upper radiant wing la.

  Still according to the preferred embodiment, the lower radiant element comprises a substantially vertical front wing 1 e, directed downwards, coming to be connected to the upper edge.

  horizontal of the upper wing.

  Each vertical collector 2 or 3 consists of a first tubular conduit 8, and of a second tubular conduit 9 both of rectangular cross section and having a common vertical partition wall developing perpendicularly to the longitudinal axis of each radiant element. Opposite the partition wall, the conduit 9 has a transverse flat wall 9a provided with as many through holes as the radiator 1 5 comprises tubular radiant elements 1. These tubular elements 1 by their ends connect to the tubular conduits 9 through these holes. So that the hydraulic connection of each radiant element is tight, the latter, at each of its ends, receives a seal 21 formed by a sole 21 has in its center a through hole and possibly provided projecting on the central zone of its rear face, of a connection end pierced right through and coming through its drilling to extend the drilling of the sole. The connection end piece is intended to be engaged in slight tightening in the corresponding bore of the corresponding tubular conduit 9, the rear face of the sole 21 a coming to bear against the external face of the transverse plane wall 9a. The front face of the sole receives in support the end of the radiant element. The front face of the seal is provided with two lips 21 b for centering the radiant element, intended to partially surround the periphery of the end of the latter. To ensure the fixing of the seal to the radiant element, the latter comprises at each of its ends in the water passage channel that it determines, two forms of troughs. These trough shapes are parallel to the longitudinal axis of the radiant element and are arranged diametrically opposite. These forms of troughs are tapped at the end and each receive the rod

  threaded with a fixing screw engaged in a through hole in the sole 21A of the seal 21.

  By tightening the screw, the head of which is housed for example in a counterbore made in the sole from the rear face, the joint by its front face is firmly applied against the end of

the radiant element 1 Each collector 2,3, along a geometric plane parallel to the face

  transverse 9a and situated slightly in front of the latter, is provided on either side of the duct 9 with two vertical wings 22, 23 for fixing the radiant elements 1. Each radiant element, 1 by the ends of each of its wings is intended to come into abutment against the wings of the manifolds and comprises on each of its wings, along the latter, a form of trough provided at each of its ends with a thread in which is screwed the rod of a screw engaged in g a through hole made in the corresponding wing of the corresponding collector and bearing by its head against said wing. Thus by tightening the screws, the seals 21 associated with each radiant element are applied by the rear face of their sole against the transverse wall 9a and the wings la and 1b of the radiant elements are applied respectively against the wings 22 and 23 collectors. The rear wing 23 of each manifold has a right angle return 23a intended to bear against the wall. This right angle return 23a, located opposite the two collector conduits, keeps the rear end of the channels formed by the elements at a distance from the wall.

radiant 1.

  Each manifold has in the upper part an upper connection 10 in hydraulic relation with the two conduits 8, 9, this connection being able to receive either an adjustment valve 11 with a valve or a closure plug 1 Oa. In the embodiment shown in FIG. 1, the valve regulating valve 11 equips the upper connection of the supply manifold and occupies an upstream position with respect to the water circuit in the radiator, but it goes without saying that this valve, according to an alternative embodiment can be mounted in the upper connector 10 of the recovery manifold and can occupy a downstream position relative to the water circuit in the radiator. In the lower part, each collector is equipped with a valve 12 for distribution, stop and emptying, comprising a connection nozzle 13 to which is fixed by any known means, or, as the case may be, a supply hose 14 connected by a terminal connector 15 which it comprises, at the supply nozzle, or a return hose 16 connected by

  a terminal connector 17 which it comprises, at the return connection 6.

  Preferably, each manifold 2, 3 is associated with four external chutes each having end threads into which the fixing screws of the

  upper connection 10 and valve 12.

  This radiator is further provided with vertical trim pieces 18 surrounding the manifold, upper corner trim pieces 19, surrounding the upper fittings 10 and

  lower parts 20 of corner covering coming to surround the valves 12.

  According to the preferred embodiment, each vertical cladding piece has a curved cross section and comprises, projecting on its internal face, near its vertical front edge, a vertical chute shape engaging around the vertical edge. free, of the front wing 22. Furthermore, the rear vertical edge of the vertical covering part has a hook shape intended to come to cooperate in shape engagement with a hook shape formed on the return 23a. This arrangement ensures the removable fixing of the covering part.

18 on both wings 22 and 23.

  Each upper corner covering piece 19 forms a shell and is provided with a through hole facing the corresponding upper connection. This corner trim piece 19 is provided with a centering rim cooperating in form fitting with the upper part of the vertical trim piece and two centering pins engaging under the wing 1 c respectively at level of the two angles that this wing forms with the front wing la and the rear wing lc. The centering flange and the centering pins therefore ensure that the

position of this part 19.

  Each lower corner covering piece 20 also forms a shell and is projecting on its concave part with a tubular projection 20a. A cylindrical through hole is made along the median longitudinal axis of the tubular projection, this through hole opening into the convex face of the lower corner covering piece. This corner piece is provided with a centering rim intended to cooperate in form fitting with the vertical covering piece 18 and in the concavity which it delimits, with a horizontal wall 24 on which the valve 12 is fixed. According to the preferred embodiment, the wall 24 is provided with four through bores arranged respectively in the axis of the four chutes that the corresponding collector comprises and the valve body is also provided with four through bores positioned respectively in alignment through holes in the wall 24 and in alignment with the troughs. The valve is fixed to the wall 24 and to the manifold by

  screws engaged in these holes and in the end threads of the trunking.

  According to the preferred embodiment, each valve comprises a valve body 25 of parallelepipedal shape bearing by its horizontal lower face on the wall 24. By its horizontal upper face the valve body is brought against the lower end of the corresponding manifold. In the valve body from one of the vertical faces of the latter is bored along a horizontal axis, a cylindrical chamber 26 into which open three through holes made in the valve body. The first and second through holes 27, 28 occupy a radial position relative to the axis of the chamber and are formed in the valve body from the upper face of the latter. These two holes respectively come in alignment with the first and second conduit 8, 9 of the corresponding manifold 2, 3. Preferably, the median longitudinal axes of these two holes are arranged in the same geometric plane. The third through bore 29 occupies an axial position relative to the cylindrical chamber and receives the connection end piece 13. In the valve chamber is disposed a movable element 30, in the form of a key, constituted by a

  tubular casing of cylindrical shape defining a hollow internal cylindrical volume.

  The envelope is provided t along one of its two ends with a water passage opening, arranged in relation to the connection end piece 13 and at the other end with a sealing partition 31 of the internal volume that it defines. The part of the key corresponding to the watertight wall projects slightly beyond the corresponding vertical face of the body and is engaged in rotation in the tubular end piece 20a. This wall has an external cavity in the form of a slot with which is intended to cooperate in form fitting for the transmission of a rotational movement, a cavity of complementary shape formed at the end of a maneuvering instrument. The tubular wall of the key comprises, along a first straight section located in the axis of the first through bore 27 of the body, a first through bore 32, radial and along a second straight section located in the axis of the second through bore 28 of the body, a second radial through hole 33. These holes are angularly offset from one another by a value equal to 90 degrees. By rotation of the key, hydraulic communication is established either between the connection endpiece 13 and the first conduit 8 of the manifold 2, 3 or between the connection endpiece 13 and the second conduit

9 of the collector.

  The key 30 of the valve 12 along the cross section containing the axis of the first drilling 32 comprises a third radial through bore 34 radial and along the straight section containing the axis of the second through radial bore 33, a fourth through radial bore 35, the longitudinal axes of these two holes 34, 35 being contained in the same radial plane containing the axis of rotation of the key 30. Thus by rotation of the key, the third and fourth radial through holes are brought simultaneously opposite the first and second through holes 27 and 28 of the valve body to ensure the communication of the two conduits 8, 9 with the connection end piece 13. Advantageously, the first 32 and third 34 through radial holes of the key are diametrically opposed while the second 33 and fourth 35 radial through holes are offset by ninety degrees. By rotation, the valve key can also be brought into the closed position of the through holes 27, 28 of the valve body. According to this position, the conduits 8, 9 of the

  corresponding manifolds are isolated from the connection piece 13.

  As said previously, the upper connector 10 fitted to each manifold 2, 3 consists of a body 36 of parallelepiped shape, in which is bored a cylindrical chamber 37 open on one of the vertical faces of this body. The upper connector is positioned on the corresponding manifold so that the opening which the chamber comprises is arranged opposite the through bore which the corresponding corner covering piece 19 comprises. In this room open a first 38 and a second 39 holes

  radial formed in the body of the fitting from the horizontal underside of the latter.

  These holes are in correspondence respectively with the first tubular conduit 8 and the second tubular conduit 9 of the manifold 2,3. Between the mouths of the two holes 38, 39 in the chamber 37 is provided a seat for a valve. In addition, the chamber 37 is provided from its mouth on the face of the body, with a tapping intended to receive, by screwing, the threaded end of a closure plug 10a or else the threaded part of the globe valve 11. This valve with valve 1 1 for the purpose of regulating the water flow between the first bore 38 and the second

  39 and consequently the water flow in the radiator.

  The front wing of the lower radiant element projecting from that of these two large internal faces to the volume defined by the radiator, a horizontal rule 41 to which are fixed in an adjustable manner in position, two horizontal supports 42 respectively receiving the two connection pieces 15, 17 of the hoses 14, 16. The possibility of adjusting the position of the connection pieces 15, 17 makes it possible to position the latter in the axis of the corresponding nozzles 4, 6, the hoses 14, 16 being to them held by pins, behind

  and opposite the front wing 1 e, to be masked by the latter.

  According to the preferred embodiment, the rule 41 is provided with a longitudinal projecting rim 43, of retention and each support piece 42 is secured by screws 44 to a stirrup in the form of an inverted U engaged by one of its wings, on the ruler behind the protruding rim and bearing on the longitudinal free edge of this wing on said ruler. By its core, the stirrup rests on the retaining rim 43. The stirrup core is provided with a through thread in which engages in screwing the threaded rod of the screw 44 also engaged in a bore crossing made in the support 42. A spring 45 with non-contiguous turns is arranged around the rod of the screw in compression between the support piece 42 and the rule. The assembly as previously described allows the positioning of the support piece along the rule, in height along the screw and in inclination relative to the slide by pivoting around the screw. As said before, the radiator is suspended from two suspension hooks 46

attached to the wall.

  According to the preferred embodiment, each suspension hook is constituted by a parallelepiped block provided from its upper face with a vertical slot 47. Under the vertical slot, perpendicular to the plane of the latter is made a through hole in which is engaged the fixing screw 48 of the hook to the wall. In the vertical slot 47 is engaged the rear wing ld of the upper radiant element 1. This wing comes to rest on the bottom of the slot. The upper parts of the slot are rounded so as to facilitate the introduction of

the wing ld.

  Finally the internal parts of the heat exchanger, i.e. those intended to be in

  contact with water receive a polyurethane coating.

  It goes without saying that the present invention can receive all arrangements and variants of the

  field of technical equivalents without departing from its scope.

Claims (18)

  1 / Heat exchanger of the radiator type for central heating installation comprising several horizontal radiant tubular elements (1) hydraulically connected by one of their ends to a vertical collector (2) for water supply and by the other end to a collector vertical (3) water recovery, the water supply manifold (2) being hydraulically connected by a supply nozzle (4) to the hot water supply line (5) of the installation and the recovery manifold (3) by means of a return connection (6) to the water return pipe (7), so that the circulation of hot water through the radiant tubular elements (1 ) can be established from the supply collector (2) to the recovery collector (3) and the heat transferred to the surrounding medium by thermal transfer through the wall of the radiant tubular elements (1) and the circulation of water in the radiator settled down nt schematically along a diagonal, characterized in that: - one of the collectors or first collector (2) (3) consists of a first tubular conduit (8) and a second tubular conduit (9) hydraulically connected l 'to each other in the upper part by an upper connector (10) covering the upper end of each of the conduits (8), (9), - the second conduit (9) is hydraulically connected to the radiant tubular elements (1 ) and is closed in the lower part and the first is intended to be hydraulically connected from a connection end piece (13) in hydraulic relation with its lower end, to one of the two nozzles (4), (6) via a flexible (14), (16) with end fitting (15), (17), - and the other manifold or second manifold (2), (3) consists of at least one tubular conduit hydraulically connected to the radiant tubular elements (1), said duct being intended to be hydraulically connected ment from a connection end piece (13) in hydraulic relation with its lower end, to the other connection (4), (6) by means of a second hose (14), (16) with terminal connection (15), (17).   2 / heat exchanger according to claim 1, characterized in that the two conduits (8), (9) of the first manifold are both connected to a hydraulic valve (12) for distribution comprising a valve body (25) in which is bored a chamber (26) into which open three through holes drilled in the valve body, the first (27) and the second (28) holes being in connection with the lower end of the two conduits (8) (9) and the other with the connecting piece (13), said valve (12) comprising in the chamber a mobile element (30) movable between a first position according to which on the one hand the hydraulic communication between the first tubular conduit (8) and the connection end piece (13) is ensured and on the other hand the hydraulic communication between the second tubular conduit (9) and the connection end piece (13) is interrupted, and a second position in which on the one hand the hydraulic communication between the first tubular conduit (8) and the connecting piece (13) is interrupted and on the other hand the hydraulic communication between the second   tubular conduit (9) and the connecting piece is established (13).   3 / Heat exchanger according to any one of the preceding claims,   characterized in that the upper connection (10) of the first manifold (2), (3) is associated with a globe valve (11), intended for adjusting the water flow rate between the first (8) and the second conduit (9), the valve of said tap (11) being able to be arranged in an interrupted position   water circulation between the first (8) and the second (9) tubular conduit.   4 / heat exchanger according to any one of the preceding claims,   characterized in that the second manifold (2), (3) also consists of a first tubular conduit (8) and a second tubular conduit (9) hydraulically connected to each other in the upper part (10 ) by an upper connector covering the upper end of each of the conduits, the second conduit being hydraulically connected to the radiant tubular elements (1) and the two conduits of the second manifold (2), (3) being both connected to a valve hydraulic (12) distribution comprising a valve body (25) in which is bored a chamber (26) into which open three through bores made in the valve body, the first (27) and the second (28) bores being relationship with the lower end of the two conduits (8), (9) and the other with the connection end piece (13), said valve (12) comprising in the chamber (26) a movable element (30) movable between a first position according to which of e the hydraulic communication between the first tubular conduit (8) and the connection end piece (13) is ensured and on the other hand the hydraulic communication between the second tubular duct (9) and the connection end piece (13) is ensured interrupted, and a second position according to which on the one hand the hydraulic communication between the first tubular conduit (8) and the connecting piece (13) is interrupted and on the other hand the hydraulic communication between the second tubular conduit (9) and the connection end piece (13) is established, the upper connection (10) of each manifold being designed to receive either a globe valve   (11) or a sealing plug (10a).   / Heat exchanger according to claim 4, characterized in that the movable element (30) of the or each valve can be positioned in the chamber (26) of the valve body (25), in a completely closed position according to which no hydraulic communication is established between the connection end piece (13) and the first (27) and second (28) holes of the valve body.   6 / heat exchanger according to claim 4 or claim 5, characterized in that the movable element (30) of the valve (12), by displacement in the chamber of the valve body, is positionable in a drain position according which the first (27) and second (28) bores of the valve body are simultaneously hydraulically connected to the end piece connection (13).   7 / heat exchanger according to any one of claims 2 to 6, characterized in   that the or each valve (12) is of the key type and consists of a body in which is formed a cylindrical chamber (26) into which open a first through bore (27) and a second bore (28) all two in the wall of the body, the longitudinal axes of said holes being contained in the same geometric plane containing the longitudinal median geometric axis of the chamber (26), and said holes being positioned respectively opposite the first tubular conduit (8) and the second tubular conduit (9) of the manifold (2), (3) associated, said valve body (25) being provided in the axis of the cylindrical chamber, with a through hole in which engages the end piece connection (13) and the key (30) of the valve being constituted by a tubular casing of cylindrical shape delimiting a hollow, cylindrical internal volume, said casing comprising at one of its two ends a water passage opening, di sposed in relation to the connection end piece (13) and at the other end a watertight partition (31), for closing off the volume which it delimits, the tubular wall of the key (30) further comprising, according to a first straight section located in the axis of the first through bore (27) of the body wall (25) and along a second straight section located in the axis of the second through bore (28) of the body wall (25), respectively a first radial through hole (32) and a second radial through hole (33), said first and second radial through holes (32), (33) being angularly offset from each other by an angular value different from the value of the angular offset that may exist between the first hole (27) and the second hole (28) of the body (25) and sufficient so that when one of the said holes (32, 33) of the key (30) is in partial or total communication with the corresponding through hole (27, 28) of the body to ensure hydraulic communication between the corresponding tubular conduit (8, 9) and the connection end piece (13), the other is completely disengaged from the corresponding hole in the wall of the valve body to prevent any hydraulic communication between the other tubular conduit (8, 9) of the   associated collector and connection end piece (13).   8 / heat exchanger according to claim 7, characterized in that the longitudinal axes of the first (27) and second (28) holes in the valve body are contained in a   same geometrical plane containing the longitudinal median geometrical axis of the chamber (26).   9 / A heat exchanger according to claim 7 or claim 8, characterized in that the valve key (30), along the cross section containing the axis of the first radial through bore (32), comprises a third through radial bore radial (34) and along the cross section containing the axis of the second radial through-hole (33), a fourth radial through-hole (35), the value of the angular difference between the third (34) and fourth (35) holes through holes being equal to the value of the angular difference between the first (27) and second (28) through holes of the valve body, so that by rotation of the key (30), the third (34) and fourth (35 ) radial through holes are brought simultaneously opposite the   first (27) and second (28) through holes in the valve body.   / Heat exchanger according to claim 9, characterized in that the first (32) and third (34) through radial holes of the key (30) are diametrically opposed while the second (33) and fourth (35) through radial holes are offset by ninety degrees.   11 / Heat exchanger according to any one of claims 7 to 10, characterized   in that the end closure wall (31) that comprises the key (30) has an external imprint with which is intended to cooperate in form fitting, for the purpose of transmitting a rotational movement, an imprint of complementary form provided in   end of an operating tool.   12 / Heat exchanger according to any one of the preceding claims   characterized in that the or each upper connector (10) consists of a body (36) into which is formed a cylindrical chamber (37) open on one of the faces of the body (36) of the connector, into which chamber open out a first (38) and a second (39) through holes, intended to be brought in and kept in correspondence, respectively with the first tubular conduit (8) and the second tubular conduit (9) of the manifold (2, 3), a seat (40) for a valve being formed in the chamber (37) between the mouths of the two through holes (38, 39), said cylindrical chamber (37) being moreover provided from its mouth on the face of the body, with a tapping intended to receive the threaded end of the   blanking plug (1 Oa) or the threaded part of a valve tap (11).   13 / Heat exchanger according to any one of the preceding claims,   characterized in that the radiant tubular elements (1) are arranged one above the other at constant intervals and determine two by two of the heat exchange channels in which circulates the air.   14 / heat exchanger according to claim 13, characterized in that each radiant tubular element (1), along its cross section, is longer than wide and has along its cross section a large median axis in the direction of the length of its section and a small median axis in the direction of its width, the said element being arranged by the major axis of its section   straight parallel to the axis of the form channel.   / Heat exchanger according to claim 1,4 characterized in that each radiant tubular element (1) is positioned so that the major axis of its cross section is tilted horizontally.   16 / Heat exchanger according to claim 15, characterized in that each radiant tubular element is positioned so that the major axis of its cross section is inclined   from the rear of the radiator to the top and towards the front of the radiator.   17 / Heat exchanger according to any one of claims 13 to 16,   characterized in that each radiant tubular element (1) has an oblong cross section,   the major axis of the straight section being inclined to the horizontal.   18 / Heat exchanger according to any one of the preceding claims,   characterized in that each radiant element (1) according to that of its equatorial planes containing   the long axis of its cross section has externally at least one radiant wing.   19 / Heat exchanger according to claim 18 characterized in that each radiant element comprises two opposite external radiant wings, namely an upper wing   front (la) and a rear lower wing (lb).   / Heat exchanger according to any one of the preceding claims,   characterized in that the upper radiant tubular element (1) is provided with a horizontal wing (lc) forming backwards, said horizontal wing (lc), from its horizontal rear edge being extended downwards by a wing support (ld) intended to come to rest by its edge   lower horizontal in suspension hooks (46) fixed to the wall.   21 / Heat exchanger according to claim 19 and claim 20, characterized in that the horizontal wing (1lc) is rooted at the horizontal upper edge of the radiant wing superior.   22 / heat exchanger according to any one of the preceding claims,   characterized in that the lower radiant element comprises a substantially vertical front wing (the) directed downwards, projecting on that of these two large faces, internal to the volume defined by the radiator, a horizontal rule (41) at which are fixed in an adjustable manner in position, two horizontal supports respectively receiving the two pieces of connection (15), (17) of the hoses.