EP1729073B1 - Radiator system with several possibilities of connection - Google Patents

Description

The present invention relates to a radiator system with a radiator comprising a plurality of interconnected members, each member having at its two ends at least two overflow openings which create a fluid connection between adjacent members. Those overflow openings, which are formed on the arranged on the outside of the radiator end members and open to the outside of the radiator system, are provided with connection fittings and serve as connection openings, where either the Heizfluidvorlauf- or return line can be connected. In addition, at least two members of the radiator at one of its ends comprise at least one further connection opening for selectively connecting the Heizfluidvorlauf- or return line. Accordingly, the radiator system normally includes six such ports, two of which are located on each side of the radiator system. The end user thus has the free choice of which side of the radiator he wants to connect the Heizfluidvorlaufleitung and on which side he Heizfluidrücklaufleitung. The radiator system can be used flexibly. Depending on the choice of the end user, it may be necessary that a certain overflow between an end member and an adjacent member must be fluid-tightly sealed in order to avoid a hydraulic short circuit during operation of the radiator system. The corresponding overflow opening is then sealed in a fluid-tight manner by the customer with a sealing system, wherein normally a sealing body of the sealing system in the overflow opening is used and is pressed sealingly against the edge surrounding the overflow opening.

Such a sealing system is for example in the EP 1 243 887 A1 described. This sealing system comprises at least one sealing body, a pressure element and a sealing pin, wherein the sealing body is designed as a sealing ring with a defined passage opening, the sealing pin has an end face and the pressure element comprises at least a flat area with an opposite the end face of the Abdichtstiftes enlarged diameter. The pressure element is arranged between the sealing ring and the sealing pin, the sealing pin is introduced through an opening opposite the overflow opening to be sealed, and an axially acting force is applied to the sealing pin in the direction of the overflow opening to be sealed. In this way, the end face of the sealing pin is pressed against the pressure element and this pressed with a flat area on the sealing ring, wherein the edges of the passage opening and the overflow are sealed medium-tight. A disadvantage of this sealing system is that it must be used in the factory due to its rather complicated structure and its large number of items in the radiator. A delivery of the radiator from stock directly to the customer is therefore not possible if the customer a connection variant is desired, which makes the insertion of such a sealing system required.

A radiator system having the features of the preamble of claim 1 is known from document DE 19818209 known.

It is therefore an object of the present invention to provide a radiator system of improved construction.

This object is achieved according to the present invention by a radiator system according to claim 1 and by a method for assembling a radiator system according to the invention according to claim 10 .

The radiator system according to the invention comprises a radiator having a plurality of interconnected members, wherein the members are preferably formed in a columnar shape. Each member has at least two overflow openings at its two ends, which create a fluid connection between adjacent members. Those overflow openings which are connected to an end member of the Radiator are formed and open to a free end of the radiator can be used as connection openings for connecting a Heizfluidvorlauf- or return line. At least two links further include at one end thereof at least one further port which may also be used to connect a heating fluid supply or return line. The radiator system according to the invention further comprises a plurality of fastening aids, which are each provided at an overflow opening between an end member and an adjacent member, and a plug member which is positionable on a mounting aid and with the aid of which the corresponding overflow is substantially fluid-tight closed. Such a closure of such overflow opening may be required to prevent a hydraulic short circuit during operation of the radiator system according to the invention, depending on which end overflow or at which connection opening the Heizfluidvorlauf- and return line to be connected. According to the invention a plurality of fastening aids are provided, which are each pre-assembled on the radiator system. The fastening aids and the plug element are designed such that the plug element can be positioned by the installer in a simple manner at the customer either on one of the overflow opening provided with a fastening aid. Due to the fact that the plug element can be optionally arranged at different overflow openings, different connection combinations for the Heizfluidvorlauf- and return line can be easily realized in which a corresponding sealing an overflow is required. Since the mounting aids are pre-assembled, the plug element can be easily used on site during installation of the radiator system at the customer of the installer in the appropriate overflow. When mounting aids are perforated discs, in which either a plug element is used substantially fluid-tight. The perforated disc in this case comprise an internal thread into which an external thread of the plug element can be screwed. During screwing of the plug element into the perforated disc, a seal is advantageously fluid-tight positioned between the plug member and perforated disc, for example, a set around the plug member sealing ring, which is then clamped fluid-tight between the perforated disc and a stopper of the plug member.

The plug member is advantageously formed substantially rod-shaped to improve the handling of the plug member during insertion into an overflow. A rod-shaped plug element can be kept easier during the insertion process through an end overflow opening in the corresponding adjacent overflow.

In addition, the plug element preferably has a portion on which an assembly tool can engage. This section has, for example, a recess into which a screwdriver can engage, leading edges for a wrench or the like.

In addition, the plug element is designed such that in the state in which it closes an overflow opening between an end member and an adjacently arranged member, it is completely retractable in the interior of the radiator system. In this way, conventional closure elements can be used to fluid-tightly close the end overflow after insertion of the plug element in the mounting aid. Such conventional closure elements can then also for closing all remaining, not yet closed end overflow, to which no Heizfluidvorlauf- or return line is connected, can be used. At a suitable location, if desired, instead of such a conventional closure element, a valve element may also be employed.

The radiator system according to the invention with the preassembled mounting aids has the advantage that with the aid of a plug element, a plurality of conventional closure elements and possibly a valve element substantially any connection variants of Heizfluidvorlauf- and return line are possible, which can be realized on site at the end user by the installer are. The number of components required for assembly can be reduced to a minimum. The sale of Radiator systems can be completely ex-warehouse, as no factory adjustment of the radiator systems to customer requirements is required.

Fig. 1

eine perspektivische Ansicht eines herkömmlichen Heizkörpers;

Fign. 2A bis 2L

Vorderansichten des in Fig. 1 dargestellten Heizkörpers, die schematisch verschiedene Anschlußmöglichkeiten der Heizfluidvorlauf- und Rücklaufleitung zeigen;

Fig. 3

eine Vorderquerschnittsansicht einer Ausführungsform eines Heizkörpers des erfindungsgemäßen Heizkörpersystems;

Fig. 4

eine Seitenquerschnittsansicht einer Ausführungsform einer Befestigungshilfe des erfindungsgemäßen Heizkörpersystems;

Fig. 5

eine teilweise gebrochene Seitenansicht einer Ausführungsform eines Stopfenelementes des erfindungsgemäßen Heizkörpersystems;

Fig. 6

eine teilweise gebrochene Seitenansicht einer Ausführungsform eines Ventilelementes des erfindungsgemäßen Heizkörpersystems;

Fig. 7

eine Seitenansicht einer Ausführungsform eines Verschlußelementes des erfindungsgemäßen Heizkörpersystems;

Fig. 8

eine Seitenansicht einer weiteren Ausführungsform eines Verschlußelementes des erfindungsgemäßen Heizkörpersystems;

Fig. 9

eine vergrößerte Teilquerschnitts des in Fig. 3 dargestellten Heizkörpers, die das in Fig. 5 dargestellte Stopfenelement in eingebautem zustand zeigt;

Fig. 10

eine vergrößerte Teilquerschnittsansicht des in Fig. 3 dargestellten Heizkörpers, der das in Fig. 6 dargestellte Ventilelement im eingebauten Zustand zeigt;

Fig. 11

eine Vorderquerschnittsansicht einer Ausführungsform des erfindungsgemäßen Heizkörpersystems, die die in Fig. 2E dargestellte Anschlußmöglichkeit realisiert;

Fig. 12

eine Vorderquerschnitt einer Ausführungsform des erfindungsgemäßen Heizkörpersystems, das die in Fig. 2I dargestellte Anschlußmöglichkeit realisiert, wobei zusätzlich noch ein Ventilelement eingebaut wurde; und

Fign. 13A bis 13L

Querschnittansichten einer Ausführungsform des erfindungsgemäßen Heizkörpersystems, die entsprechend den Fign. 2A bis 2L die verschiedenen Anschlußvarianten der Heizfluidvorlauf- und Rücklaufleitung zeigen, wobei dargestellt ist, an welcher Position Entlüftungseinrichtung, Verschlußelement und Stopfenelement montiert werden müssen.

Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. In it is / are:

Fig. 1

a perspective view of a conventional radiator;

FIGS. 2A to 2L

Front views of the in Fig. 1 radiator shown schematically different connection possibilities of Heizfluidvorlauf- and return line show;

Fig. 3

a front cross-sectional view of an embodiment of a radiator of the radiator system according to the invention;

Fig. 4

a side cross-sectional view of an embodiment of a mounting aid of the radiator system according to the invention;

Fig. 5

a partially broken side view of an embodiment of a plug element of the radiator system according to the invention;

Fig. 6

a partially broken side view of an embodiment of a valve element of the radiator system according to the invention;

Fig. 7

a side view of an embodiment of a closure element of the radiator system according to the invention;

Fig. 8

a side view of another embodiment of a closure element of the radiator system according to the invention;

Fig. 9

an enlarged partial cross section of the in Fig. 3 shown radiator, the in Fig. 5 shown plug element in the installed state shows;

Fig. 10

an enlarged partial cross-sectional view of the in Fig. 3 shown radiator, the in Fig. 6 shown valve element in the installed state shows;

Fig. 11

a front cross-sectional view of an embodiment of the radiator system according to the invention, the in Fig. 2E illustrated connection option realized;

Fig. 12

a front cross section of an embodiment of the radiator system according to the invention, the in Fig. 2I realized connection option shown, in addition, a valve element was installed; and

FIGS. 13A to 13L

Cross-sectional views of an embodiment of the radiator system according to the invention, corresponding to the FIGS. 2A to 2L show the various connection variants of the Heizfluidvorlauf- and return line, which is shown at which position venting device, closure element and plug element must be mounted.

In the following description, like reference numerals refer to like components.

Fig. 1 Fig. 16 is a front view of a conventional heater 10 belonging to the prior art. The radiator 10 comprises a plurality of members 12 which are arranged in series next to each other. Each member has two hub-like ends 14 and 16, in each of which two opposing circular overflow openings 18 are formed, which in Fig. 1 not shown. At the these overflow openings 13 defining edge regions surrounding the overflow openings, the members 12 are connected to each other liquid-tight. This can, for example, by welding, screwing or the like. By the connection of the individual members 12 remains in the connection area depending on a Übefströmöffnung 18, through which a Fluidaustauch between the individual members 12 can take place. At the end-side members 12 a and 12 b, which are arranged on the outer sides of the radiator 10, end overflow openings remain 18 a to 18 d, which point to the outside of the radiator 10 and make no fluid communication between two adjacent members 12. At these end overflow openings 18a to 18d connecting fittings 20 are arranged to which either a Heizfluidvorlauf- or return line is connected. Further, at the end-side member 12a and at that member 12, which is disposed immediately adjacent to the end-side member 12a, each at the lower end each have a further connection opening 22 is provided. At this connection openings 22 also a Heizfluidvorlauf- or return line can also be connected optionally.

The FIGS. 2A to 2L are schematic views showing the possible connection variants of a Heizfluidvorlauf- and return line to the in Fig. 1 shown radiator 10 show. In these figures, the Heizfluidvorlauf and return is shown by arrows. Those connection fittings 20 of the end-side overflow openings 18a to d of the end-side members 12a and 12b of the radiator 10 to which neither a Heizfluidvorlauf- nor a Heizfluidrücklaufleitung is connected, sealed fluid-tight with suitable closure elements, so that a corresponding Heizfluiddurchlauf can be generated by the radiator 10 , Instead of a closure element may also be a suitable valve element which regulates the flow of the heating medium through the radiator 10, or a closure element with a E: ftlüftung for venting the radiator 10 are arranged.

Depending on which of the in FIGS. 2A to L port variants shown by the customer is desired, it may be necessary that one of the overflow openings 18, which produces a fluid connection between an end member 12 a or 12 b and a correspondingly adjacent member 12, must be sealed fluid-tight, in order to influence the Heizfluidstrom through to take the radiator 10 and thus to prevent a hydraulic short circuit. This is for example in the case of FIGS. 2I to 2L illustrated connection variants of the case in which the connection of the Heizfluidvorlauf- and return line is provided immediately adjacent. In these variants, the one overflow opening must be closed accordingly, which connects the Heizfluidvorlauf and return directly, so for example in Fig. 2I the lower overflow opening, which fluidly connects the two outer left links with each other. If this overflow opening were not closed, the heating fluid would flow on the shortest path from Heizfluidvorlauf to Heizfluidrücklauf and thus not through the entire radiator, so it would be generated a hydraulic short circuit. This should be prevented accordingly.

At the in Fig. 2A On the other hand, it is not necessary to close an overflow opening, since in this connection variant no hydraulic short circuit is to be feared.

If necessary, an overflow port can be closed with various known sealing systems. However, these known sealing systems are designed such that they can be installed only at the factory, since the installation is relatively expensive. However, this has the consequence that the known radiators are not available directly from stock, as soon as the customer is selected a connection variant in which an overflow must be closed because before delivery to the customer, the appropriate sealing system must still be mounted. Accordingly, the order processing in this regard quite problematic.

Fig. 3 is a cross-sectional view of an embodiment of a radiator 30 of the radiator system according to the invention. The heater 30 has substantially the same structure as that in FIG Fig. 1 illustrated conventional radiator 10. Also, the radiator 30 according to the invention comprises a plurality of members 12 which are arranged in series next to each other and connected to each other. Each member 12 has two hub-like ends 14 and 16, in which two opposing circular overflow openings 18 are formed. About these overflow openings 18, the juxtaposed members 12 are fluidly interconnected. The connection of the individual members 12 can be done by welding, gluing, screwing or the like.

The end-side members 12a and 12b have at their hub-like ends 14 and 16 each have an overflow 18a, b, c and d, which opens to the outside of the radiator 30 and does not serve as a fluid connection between two members 12. At these end overflow openings 18a-d, a connection fitting 20 is arranged, to which a Heizfluidvorlauf- or return line is selectively connectable, which will not be explained in detail at this point. Further, the end-side member 12a and the adjacently arranged member 12 each comprise at its hub-like end 14, a further connection opening 22, to which also optionally a Heizfluidvorlauf- or return line is connected. In that regard, the radiator 30 of the invention corresponds to the in Fig. 1 illustrated conventional radiator 10th

Unlike the conventional radiator 10 is in the radiator 30 according to the invention at the two overflow openings 18, which connect the end-side member 12 a and the adjacently disposed member 12 fluidly together, in each case a mounting aid 32 pre-assembled. This attachment aid 32 is fixed to one of the two members 12a or 12, in FIG Fig. 3 attached to the end member 12a. The attachment can be done by gluing, welding, screws or the like, wherein the transition between the mounting aid 32 and the corresponding member 12 or 12a is formed fluid-tight. The fastening aids 32 are used for fastening a plug element or a valve element which is inserted during assembly of the radiator 30 at the end user by the installer through the end overflow opening 18 a or 18 b in the radiator 30 and inserted into the corresponding mounting aid 32.

Fig. 4 is a cross-sectional view, which is an enlarged view of one of in Fig. 3 shown fastening aids 32 shows. The attachment aid 32 is presently formed hole plate similar and bent along its inner diameter to form a hollow cylindrical projection 34 away. The projection 34 includes an internal thread 36 into which a corresponding external thread of a plug element or a valve element can be screwed, which is explained in more detail below.

Fig. 5 is a partially sectioned front view of an embodiment of a plug element 38 of the radiator system according to the invention. The plug member 38 is substantially rod-shaped and has a circular cross-section. The one end, with which the plug member 38 is insertable into the mounting aid 32, has a chamfer 40, which facilitates the insertion of the plug member 38 into the cylindrical opening of the mounting aid 32. At the other end of the plug member 38, a slot 42 is provided for receiving a screwdriver. Adjacent to the chamfer 40, the plug member 38 includes an external thread 44 that can be brought into engagement with the internal thread 36 of the mounting aid 32. To the external thread 44, a shoulder 46 connects, which serves as a stop when inserting the plug member 38 in the mounting aid 32. The shoulder 46 includes an annular recess 48 in which a sealing ring can be arranged to fluid-tightly close the transition between the plug member 38 and the mounting aid 32.

Fig. 6 is a partially sectioned front view of an embodiment of a valve element of the radiator system according to the present invention. The valve element 50 does not differ in its function from conventional valve elements, which is why will not be discussed in detail below. The valve element 50 is substantially rod-shaped and has a circular cross-section. Around the outer periphery of a free end 52 of the valve element 50, a hollow cylindrical seal 54 is arranged, which projects beyond the free end 52 of the valve element 50 on one side. The other end of the hollow cylindrical seal 54 abuts a shoulder-shaped stop 56 which prevents movement of the hollow cylindrical seal 54 in the direction of the other free end 58 of the valve element 50. The hollow cylindrical seal 54 is in the state in which the valve element 50 is inserted into the heating element 30 according to the invention, pressed under the action of an axial force against a mounting aid 32, whereby a fluid-tight press connection between the valve element 50 and the mounting aid 32 is generated. To generate the axial force, the valve element 50 comprises an external thread 60 which can be screwed into a corresponding internal thread of a connection fitting 20 of the radiator 30 according to the invention. For sealing the valve element 50 relative to the connection fitting 20th the valve member 50 includes near its free end 58 a shoulder 62 which has an annular recess 64 in the direction of the free end 52 of the valve element 50 into which a sealing ring 66 can be inserted.

Fig. 7 is a side view and shows an embodiment of a closure element 70 of the radiator system according to the invention. The closure member 70 is substantially cylindrical and comprises at one end a helical portion 72 on which a wrench can attack, next to a stop 74 in the form of a paragraph and a subsequent to the stop 74 and to the other end of the closure element 70th extending external thread 76 which is screwed into a corresponding internal thread of a connection fitting 20 of the radiator 30 according to the invention.

Fig. 7 is a side view of another embodiment of a closure element 80 with integrated vent. As well as the closure member 70, the closure member 80 comprises a helical portion 72, a stop 74 and an external thread 76. In addition, the closure member 80 comprises a venting device 82, the structure and function of which are already known in the art and are therefore not further explained.

The in the FIGS. 3 to 8 illustrated embodiment of the radiator system according to the invention thus comprises, briefly summarized, the radiator 30 according to the invention, at the end overflow openings 18a to d and at the connection openings 22 each connection fittings 20 and arranged at the overflow openings 18 which the fluid connection between the end-side member 12a and the corresponding produce adjacent member 12, according to the invention mounting aids 32 are pre-assembled. Furthermore, this embodiment of the radiator system according to the invention comprises a plug element 38 and a valve element 50, which can be used in each case in one of the preassembled mounting aids 32, wherein the transition between the plug member 38 and between the valve member 50 and the mounting aid 32 is closed fluid-tight in the inserted state , Finally, closure elements 70 and / or closure elements 80 provided with which the connection fittings 20 are optionally closed fluid-tight.

Fig. 9 is an enlarged partial cross-sectional view of the in Fig. 3 illustrated embodiment of the radiator 30 according to the invention, the in Fig. 5 shown plug element 38 in the installed state shows. The plug element 38 is arranged as follows: The plug element 38 is guided through the end overflow opening 18b of the radiator 30 and inserted with the chamfer 40 ahead through the hollow cylindrical projection 34 of the mounting aid 32 until the external thread 44 of the plug member 38 with the internal thread 36 of the mounting aid 32 comes into engagement. Subsequently, a screwdriver is attached to the slot 42 of the plug element 38 and the external thread 44 of the plug member 38 is screwed into the internal thread 36 of the mounting aid 32, wherein during the threaded engagement an annular seal 86 which is arranged in the annular recess 48 of the plug member 38, between the Paragraph 46 of the plug member 38 and the mounting aid 32 is compressed to produce in this way a fluid-tight connection between the mounting aid 32 and the plug member 38. After insertion of the plug member 38 in the mounting aid 32, the external thread 76 of the closure element 70 is screwed into the corresponding internal thread of the connection fitting 20 and thus the end-side overflow 18b closed fluid-tight.

Fig. 10 is an enlarged partial cross-sectional view of the in Fig. 3 shown heater 30 according to the invention, the in Fig. 6 shown valve element 50 in the installed state shows, wherein the positioning process is described below. First, the valve element 50 is guided with its free end 52 ahead through the opening of the connection fitting 20 until the external thread 60 of the valve element 50 engages with the corresponding internal thread of the connection fitting 20. The valve member 50 is further threaded into the port fitting 20 creating an axial force which, supported by the stop 56, presses the hollow cylindrical seal 54 of the valve member 50 against the mounting aid 32 creating a fluid tight connection between the mounting aid 32 and the valve member 50. Via the sealing ring 66, which in the annular recess 64 of the valve element 50th is inserted, also a fluid-tight connection between the valve element 50 and the connection fitting 20 is generated during the screwing.

Fig. 11 is a front cross-sectional view of the radiator system according to the invention, showing a particular connection variant. The radiator 30 according to the invention is as in Fig. 3 shown pre-assembled supplied to the end user, in which the radiator system according to the invention to be installed. At the request of the end user, a connection variant is now to be realized in which Heizfluidvor- and return line to be made on opposite sides of the radiator 30 according to the invention at the same height, in Fig. 11 So lower left and lower right, which is represented by the corresponding arrows. In order to prevent the heating fluid from flowing directly from the end-side overflow opening 18b through the lower hub-like ends 14 to the end-side overflow opening 18d, ie to prevent a hydraulic short circuit, the lower overflow opening 18 must be closed in a fluid-tight manner between the two connection openings 22. Accordingly, in this overflow 18, as in Fig. 9 is shown, the plug member 38 is inserted. Furthermore, the two connection openings 22 and the end-side overflow opening 18a are closed fluid-tight with corresponding closure elements 70 by the closure elements are screwed into the respective connection fittings 20. In the connection fitting 20, which is arranged at the end overflow opening 18 c, a closure element 80 is provided with integrated vent. Due to the arrangement of the plug member 38, the heating element 30 according to the invention is uniformly flowed through by the heating fluid, which is shown schematically by the arrows.

Fig. 12 is a cross-sectional view of the radiator system according to the invention, showing a further connection variant. According to Fig. 12 the Heizfluidvor- and return line are realized side by side at the connection openings 22. In order to avoid a hydraulic short circuit, the plug element 38 is again inserted into the lower fastening aid 32 between the two connection openings 22. Further, a valve element 50 is as in FIG Fig. 10 is shown attached to the upper mounting aid 32. The connection fittings 20 at the end-side overflow openings 18b and 16d are fluid-tight with closure elements 70 locked. On the connection fitting 20 of the end-side overflow opening 18c, in turn, a closure element 80 is provided with integrated vent. By choosing the appropriate arrangement of the plug element 38, the valve element 50, the closure elements 70 and the closure element 80 of the in Fig. 12 Heating fluid flow represented by the arrows produced by the radiator 30 according to the invention.

The FIGS. 13A to 13L are cross-sectional views of the radiator system according to the invention, showing the possible connection variants. The in this Fign. shown connection options correspond to those connection options that in Fig. 2 are shown for a conventional radiator. The main advantage of the radiator system according to the invention is that all of the in the FIGS. 13A to 13L port variants shown by the installer in the assembly of the radiator system according to the invention can be realized at the end user, without a workshop-side adjustment of the heating system in relation to the customer is required. Furthermore, the radiator system according to the invention comprises only a few components, namely the radiator 30 with the preassembled connection fittings 20, connection openings 22 and fastening aids 32, a plug element 38, a valve element 50 as desired, a corresponding number of closure elements 70 and, if desired, a closure element 80.

In the FIGS. 13A to L no valve elements 50 are shown. It should be understood, however, that a closure member 70 may be replaced with a corresponding valve member 50 as desired.

It should also be noted that in the FIGS. 2 to 13 illustrated embodiment of the radiator system according to the invention only serves as an example and does not limit the scope of the present invention, which is defined by the appended claims.

In particular, the heating element 30, the connection fittings 20, the connection opening 22, the mounting aid 32, the plug element 38, the Valve element 50, the closure element 70 and the closure element 80 be configured differently than it is in the Fign. is shown. <U> REFERENCE LIST: </ u> 10 radiator 80 closure element 12 element 82 vent 12a, b, c, d end member 86 poetry 14 hub-like finish 16 hub-like finish 18 overflow 18a, b, c, d end overflow opening 20 connection fitting 22 connecting opening 30 radiator 32 mounting aid 34 head Start 36 inner thread 38 plug member 40 chamfer 42 slot 44 external thread 46 paragraph 48 deepening 50 valve element 52 free end 54 poetry 56 attack 58 free end 60 external thread 62 paragraph 64 recess 66 seal 70 closure element 72 section 74 attack 76 external thread

Claims (3)

1. A radiator system comprising:

   - a radiator (30) which comprises several links (12) which are connected to each other, wherein each link (12) is provided at its two ends (14, 16) with at least two overflow orifices (18) which create a fluidic connection between respectively adjacent links (12), and at least two links (12) comprise at least one connection opening (22) at one of their ends,

   - a plus element (38),

   - a valve element (50) which is bar-shaped with a circular cross section, wherein a shoulder-shaped stop is situated at one end of the valve element, on which stop a hollow cylindrical gasket (54) sits closely, as well as

   - several fastening devices (32) which are respectively pre-mounted at an overflow orifice (18) between an end link (12a, 12b) situated at a free end of the radiator (30) and an adjacent link (12),

   characterized in that
   optionally either the plug element (38) or the valve element (50) can be positioned at the fastening devices (32) and thus the corresponding overflow orifice (18) can be essentially closed in a fluid-tight manner,
   wherein the fastening devices (32) are perforated discs which comprise an inner thread,
   wherein in the state in which the valve element (50) is inserted into the radiator (30) the hollow cylindrical gasket (54) can be pressed against the respective fastening device (32) under the effect of an axial force supported by the stop (56) and
   wherein the plug element (38) can be screwed with an outer thread (44) into the inner thread (36) of the respective perforated disc (32),
   wherein the fastening devices (32) and the plug element (38) are designed such that the fitter who is at the customer's place can position the plug element (38) optionally at one of the overflow orifices (18) provided with a fastening device (32) and that in the state in which the plug element (38) closes an overflow orifice (18) between an end link (12a, 12b) and an adjacent link (12), the plug element (38) can be completely introduced into the interior space of the radiator (30).
2. A radiator system according to one of the preceding claims, wherein the plug element (38) comprises a gasket (86).
3. A radiator system according to one of the preceding claims, which furthermore comprises closing elements (70, 80) by means of which the overflow orifices (18a-d) at the ends and/or the connection openings (22) can be closed in a fluid-tight manner.

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