EP3109561B1 - Radiator - Google Patents

Description

The present invention relates to a radiator according to the preamble of claim 1.

Radiators with center connection and riser are basically known, for example from the DE 102 03 313 A1 or the DE 195 39 222 C1 showing a radiator according to the preamble of claim 1.

In the EP 2 428 748 A2 is further described a serially flowed through radiator with two hot plates, with alternative inlet and return connections are provided. Here, first, the room-side heating plate and then the wall-side heating plate is flowed through by heating medium. In such a serial radiator, however, are fundamentally different flow conditions than, for example, parallel radiators flowed through and accordingly, the alternative inlet and return connections are flowed through and connected differently.

The object of the present invention is to provide a center connection radiator of the type mentioned above with higher connection variability.

This object is solved by the characterizing features of claim 1. It is provided that at least a second alternative flow connection and at least a second alternative return connection are provided, wherein the second flow connection with the center connection set is fluidly connected, so that inflowing via the second flow connection heating fluid enters the distribution set.

The radiator according to the invention accordingly has a central inflow or flow connection set. Such center connections are now standard, especially in new buildings. In addition, according to the invention, at least one further off-center lateral alternative flow connection is now also provided which, for example, is currently relevant for the replacement of radiators in old buildings.

The flow characteristic of the radiator according to the invention, in particular a multi-layer parallel-flow radiator, is fundamentally different than that of a serial radiator, in particular as that in the EP 2 428 748 A2 described radiator. While there, the inflowing via the flow heating medium is passed directly into the additional alternative flow connection and is led through a heating channel of the heating plate upwards and first only in the Distributed first room-side heating plate, the heating medium is - in the radiator according to the invention - regardless of which of the two flow connections, ie via the first flow connection or the second alternative flow connection - passed directly into the separate riser. Accordingly, this riser is not one of the heating channels of the heating plates but a defined tube which is the only connection for the heating fluid from the connection fitting to the above connectors. The heating medium can thus only and exclusively through this separate riser to the connectors and subsequently reach only in the hot plate or the heating plates.

In this way, multivariable universal connection possibilities can be realized and the required number of different models can be reduced. At the same time, preparation and planning becomes easier for installation companies, a smaller number of radiators must be kept in stock, and the radiator can be flexibly adapted to the existing connection geometries on site.

Furthermore, there is also a thermodynamically optimal heating water, since the feed water is always introduced at the highest point in the heating plate (s) and thus ensures optimum heat dissipation without power losses.

Advantageous developments of the invention are defined by the features of the dependent claims:
So it is for example advantageous if it is provided that the first flow connection and the first return port are designed as at least partially spherical segment-shaped configured, flow or return housing.

In order to obtain maximum flexibility for installation, it is advantageous if the riser pipe in the area between the flow housing of the first flow connection and the return housing of the first return connection is connected or connected constructively.

According to the invention it is provided that the second alternative flow connection via a pipe connection constructively on the return housing, in particular laterally connected to this, wherein the pipe connection passes through the return housing and is hydraulically connected to the riser. A possible example of such an embodiment can be found in the following in more detail Fig. 1 and 2 ,

Not according to the invention can also be provided that the second alternative flow connection via a pipe connection is constructively and hydraulically connected to the flow housing, in particular laterally. A possible example of such an embodiment can be found in the following in more detail Fig. 3 ,

According to a further advantageous embodiment, it can be provided that the second alternative flow connection is connected via a pipe connection structurally and hydraulically directly to the riser, in particular to the lowermost portion of the riser immediately above the connection fitting. A possible example of such an embodiment can be found in the following in more detail Fig. 4 , This is a structurally very simple solution, since the connection to the riser is mechanically simple to implement.

According to a further advantageous embodiment, it may be provided that a third alternative flow connection and a third alternative return connection are provided, wherein the third flow connection to the connection fitting is also fluidly connected, so that flowing over the third flow connection heating fluid enters the distribution set. In this way, both left and right forward or return ports can be provided and the connection variety is further increased. A possible example of such an embodiment can be found in the following in more detail Fig. 5 to 8 ,

In this context, it is particularly advantageous and space-saving, if it is provided that the third alternative flow connection is connected constructively via a further pipe connection to that one free flow or return housing to which the second alternative flow connection is not connected.

According to a structurally simple embodiment, it is provided that the positions at which the second alternative flow connection and the third alternative flow connection are structurally connected to the flow or return housing, in a common plane and on a common axis on opposite sides of the flow or return housing with respect to the longitudinal extent of the radiator.

In order to obtain advantageous connection flexibility for connections which are already present in old buildings, it is also possible that the second and possibly the third alternative flow connection and optionally the second and optionally the third alternative return connection are each arranged in one of the lateral, lower end regions of the radiator.

In order to further increase the connection variability and to facilitate the assembly, it is advantageously provided that the pipe connection has a releasable plug connection, via which the second, and each further, alternative flow connection and the second, and each further, alternative return connection are reversibly detachably connectable.

Furthermore, it is advantageous for design and connection reasons, if it is provided that the riser from the plane of the heating plate (s) or from the space with respect to the longitudinal extent of the heating plate (s) is centered, aligned straight and vertical.

In order to give the second alternative flow and return connection particular stability and thereby facilitate the assembly, it is provided that the second alternative flow connection and the second alternative return connection are constructively connected together to form a structural unit, in particular via a flat web. This also applies analogously to each additional flow and return connection.

An advantageous further development consists in that the second or third alternative return connection is designed as a return housing, in particular at least partially configured in the form of a spherical segment, and in each case has an end-face, laterally outwardly facing return connection connection piece. This allows additional connections for the return and the variability and connectivity is further increased.

According to an advantageous structural embodiment it is provided that the radiator is designed as a multi-layer radiator with parallel flow and has at least two mutually parallel heating plates. The flow characteristic of such a multilayer parallel-flow radiator, is fundamentally different than that of a serially flowed through radiator, in particular as that of the in the EP 2 428 748 A2 described radiator. in the Contrary to such a serial radiator with two plates, the heating medium is - regardless of which of the two flow connections, ie via the first flow connection or the second alternative flow connection - passed directly into the separate riser in the inventive parallel flow heater and from there, as previously described distributed on all plates.

A particularly advantageous embodiment provides that exactly two mutually parallel heating plates are provided, a first room-side heating plate and a second heating plate. In this embodiment, a valve for regulating the flow and for parallel distribution of the coming of the first flow connection heating fluid in both heating plates and a shut-off or sealing member to prevent the entry and flow of heating fluid in or between the / Can be used or used the two heating plates.

According to an advantageous structural embodiment it is provided that the radiator is designed as a three-layer radiator with parallel flow and three or more parallel heating plates has, a first room-side heating plate, a second closer to the wall heating plate and at least one other room-side heating plate, the is located closer to the room or even more room side than the first room-side heating plate. In this embodiment, a valve for regulating the flow as well as for parallel distribution of the coming from the first flow connection heating fluid in all heating plates and a shut-off or sealing component for preventing the entry and flow of heating fluid in or between the / used or used the heating plates.

In this context, it is structurally advantageous if the first flow connection and the first return connection and preferably also the second and each further alternative flow connection and the second and each further alternative return connection are located between the first and the second heating plate.

Furthermore, it is advantageous if the first flow connection and the first return connection are arranged in one plane eccentrically and unequally spaced from the first and second heating plate and / or if the second and each further alternative flow connection and the second and each further alternative return connection in a plane are arranged centrally and equally spaced from the first and second heating plate. This results in that the second, and everyone another alternative supply or return connection is not in the same plane between the heating plates, as the first supply and return connection. This is advantageous to obtain better compatibility, especially for old buildings.

In order to create even greater variety of connections, it can be provided in a, preferably in each, free lower end-side corner region of the radiator, a lateral connection piece is provided as a further alternative return connection.

In particular, it is advantageous and increases the connection flexibility if all lateral or frontal connections and connecting pieces of the radiator, in particular the connections of the connecting pieces, the return connection piece and / or the lateral connection piece, same dimensions, in particular the same inner diameter or thread dimensions, at least their internal thread respectively. This advantageously serves for reciprocal, interchangeable insertion of valves and / or shut-off or sealing components. The side ports have advantageously a 1/2 inch internal thread, the downwardly facing flow and return ports a 3/4 inch external thread.

In the present context, the term "serial flow" is understood to mean that the heating medium is first distributed only in one of the heating plates, usually the room-side front panel, and only then enters the second, usually wall-side, heating plate or other heating plates via a valve or other connections ,

The term "parallel flow" is understood in the present case that the coming from the flow of warm heating medium is guided substantially directly to the valve, usually via a riser, and is distributed from there into both heating plates. There, the heating medium decreases in each case and distributed over the collecting ducts and the heating channels in the two heating plates.

The term "constructively or mechanically connected or connected" is understood in the present case that a component, usually a pipe, with another component, such as a flow housing or other pipe, is firmly connected. However, this structural or mechanical connection between two components does not necessarily mean at the same time also a fluid-technical or hydraulic connection.

The term "hydraulically or fluidically or fluidically or fluidly connected or connected" is understood in the present case that two components or components are in communication with each other so that the heating medium can pass from one to the other component.

• Fig. 1a, 1b und 1c zeigen eine erste Ausführungsform der Erfindung aus verschiedenen Ansichten.
• Fig. 2a, 2b und 2c zeigen eine Variante der ersten Ausführungsform beschränkt auf die relevanten Bauteile.
• Fig. 3a und 3b zeigen eine zweite Ausführungsform.
• Fig. 4a, 4b und 4c zeigen eine dritte Ausführungsform.
• Fig. 5a und 5b zeigen eine vierte Ausführungsform.
• Fig. 6a und 6b, Fig. 7a und 7b zeigen eine Variante der vierten Ausführungsform in Schnittdarstellungen.
• Fig. 8 zeigt die relevanten Bauteile dieser Ausführungsform in einer perspektivischen Ansicht.
• Fig. 9a, 9b und 9c zeigen eine weitere Ausführungsform der Erfindung aus verschiedenen Ansichten.
• Fig. 10a, 10b und 10c zeigen eine Variante dieser Ausführungsform beschränkt auf die relevanten Bauteile.
• Fig. 11a, 11b und 11c zeigen eine weitere ähnliche Ausführungsform.
• Fig. 12a, 12b und 12c zeigen noch eine weitere Ausführungsform.
• Fig. 13a, 13b und 13c zeigen noch eine weitere Ausführungsform.
• Fig. 14 zeigt die relevanten Bauteile dieser Ausführungsform in einer perspektivischen Ansicht.
• Fig. 15a, 15b und 15c zeigen eine weitere dreilagige Ausführungsform der Erfindung aus verschiedenen Ansichten.

In the following the invention will be explained in more detail by means of exemplary and non-restrictive exemplary embodiments taking into account the following drawings, wherein the embodiments shown in FIGS. 3a, 3b, 4a, 4b, 4c, 11a, 11b, 11c, 12a, 12b and 12c do not fall within the scope of the invention:

• Fig. 1a, 1b and 1c show a first embodiment of the invention from various views.
• Fig. 2a, 2b and 2c show a variant of the first embodiment limited to the relevant components.
• Fig. 3a and 3b show a second embodiment.
• Fig. 4a, 4b and 4c show a third embodiment.
• Fig. 5a and 5b show a fourth embodiment.
• Fig. 6a and 6b . Fig. 7a and 7b show a variant of the fourth embodiment in sectional views.
• Fig. 8 shows the relevant components of this embodiment in a perspective view.
• Fig. 9a, 9b and 9c show a further embodiment of the invention from various views.
• 10a, 10b and 10c show a variant of this embodiment limited to the relevant components.
• Fig. 11a, 11b and 11c show another similar embodiment.
• Figs. 12a, 12b and 12c show yet another embodiment.
• Figs. 13a, 13b and 13c show yet another embodiment.
• Fig. 14 shows the relevant components of this embodiment in a perspective view.
• Figs. 15a, 15b and 15c show another three-layer embodiment of the invention from various views.

In Fig. 1a, 1b and 1c a first possible embodiment of the radiator according to the invention is shown, namely a two-layer radiator 1 with parallel flow with two heating plates 2, 3, namely a front, in the room facing the first room-side heating plate 2 and another second, wall-side heating plate 3. The two heating plates 2, 3 are arranged parallel to each other and have in a known manner in each case an upper and a lower horizontal collecting channel with these connecting vertical heating channels. In the space between the heating plates 2, 3 Konvektorbleche are usually arranged to increase the power through increased heat exchanger surface. However, these details are not shown in the schematic diagrams.

In the middle of the longitudinal extent of the two heating plates 2, 3, a connection fitting 4 designed as a center connection is provided, comprising a first flow connection 5 and a second return connection 6 for the inlet and outlet of the heating medium. The connection fitting 4 is arranged in the region between the heating plates 2, 3, wherein the first flow connection 5 and the first return connection 6 are in a common plane parallel to the heating plates 2, 3, but off-center offset and not equal distance from the heating plates 2, 3 (eg Fig. 1b ). The first flow connection 5 and the first return connection 6 are formed in the present embodiment as a ball-segment-shaped flow or return housing 15, 16.

In the area between the flow housing 15 and the return housing 16, a riser 12 is connected constructively. This riser 12 is hydraulically or fluidly or fluidically or fluidly connected exclusively to the flow connection 5. The riser 12 is located in the space between the heating plates 2, 3 and extends in relation to the longitudinal extent of the heating plates 2, 3 centrally and straight vertically upwards. As in Fig. 1c it can be seen, however, the riser 12 has a pivoting or a double bend and extends from the off-center lowermost position of the connection fitting 4 in a central position in the upper region and each of the heating plates 2, 3 equally spaced position. The riser 12 is a separate component or a separate tube, which is not part of the two heating plates 2, 3 and is connected directly to them neither mechanically nor fluidically. In particular, the riser 12 is not a vertical heating channel of a heating plate 2, 3.

The riser pipe 12 is part of a distributor set 7, wherein the riser pipe 12 has a T-junction in the uppermost region and merges into a horizontal pipe 18a, 18b to the left and right. In the lateral upper corner and end portions of the heating plate 2, 3 each designed as a connection connecting piece 8, 9 is connected. In the left connector 9, a shut-off or sealing member 11 for preventing the entry of heating fluid in the or the flow of heating fluid between the heating plates 2, 3 is used. In the opposite right connector 8 is a valve 10 for Regulation of the flow and for parallel distribution of the coming from the first flow connection 5 heating fluid in the heating plates 2, 3 used. In this way, the parallel flow through the radiator 1 is ensured accordingly. The riser 12 is thus the only fluid connection for the heating fluid from the connection fitting 4 to the two connecting pieces 8, 9th

In the Fig. 1a, 1b and 1c the radiator 1 is shown in frontal view, top view and side view, with black continuous and hatched arrows the flow characteristics of the heating medium are indicated. The flow paths marked by the black arrows are in principle the same in all other embodiments described here: The heating medium enters the flow housing 15 via the first flow connection 5 and reaches directly into the riser pipe 12. There, it rises and takes the path over the , here right, horizontal pipe 18a to the connector 8. About the valve 10 inserted therein, the flow rate of the heating medium is controlled in the heating plates 2,3 and open valve 10 enters the heating medium, as in Fig. 1c visible, both in the left room-side heating plate 2 and in the right wall-side heating plate 3. The warm heating medium distributed according to the upper horizontal collecting ducts, decreases over the vertical heating channels and distributed in this way on both heating plates 2.3 parallel. From the lower collecting channel of the wall-side heating plate 3, the heating medium passes through the central return housing 16 to the first return port 6 and can leave the radiator 1 (gray arrow in FIG Fig. 1b ).

According to the invention, it is now provided that at least one second alternative flow connection 13 and a second alternative return connection 14 are provided. In the embodiment according to Fig. 1 these are arranged in the lower right area, wherein the second alternative flow connection 13 is fluidly connected to the connection fitting 4, so that heating fluid, which - instead of the flow connection 5 - now flows through the second alternative flow connection 13, also passes into the distribution set 7. In the embodiment of Fig. 1 this is solved so that the second alternative flow connection 13 is laterally connected via a pipe connection 17 to the return housing 16. Hydraulically, however, the second alternative flow connection 13 is not connected to the return, but only to the first flow connection 5, since the pipe connection 17 completely penetrates the return housing 16 in the center and opens into the area of the flow housing 15. The flow path over the alternative flow connection 13 is indicated by a dashed arrow. The via the second alternative flow connection 13th inflowing heating medium thus also passes to the riser 12 and distributed from there in the distributor set 7. For the flow thus makes no difference, whether the heating medium via the first flow connection 5 or the second alternative flow connection 13 enters the radiator 1.

In addition to the second alternative flow connection 13, a second alternative return connection 14 is also provided. The second alternative flow connection 13 is connected to the second alternative return connection 14 to form a constructional structural unit, namely via a flat web 20. The second alternative return connection 14 is designed as a return flow housing 21 designed as a spherical section. The heating medium can leave the radiator 1 - via the first return port 6 - via this alternative return port 14, via the two lower collecting channels of the heating plates 2, 3 in the lower right corner area. The second alternative return port 14 is formed as a T-piece component and has a cross-connection to the first heating plate 2 and the second heating plate 3. In addition, it has an end, laterally outwardly facing return connection pipe 23, which can serve as an alternative return connection and otherwise is closed by a locking member.

It is thus possible during assembly or depending on the situation provided by the customer to choose whether the heating medium flows into the radiator 1 via the first flow connection 5 or the second alternative flow connection 13. Likewise, it can be selected whether the heating medium leaves the radiator 1 via the first return connection 6 or the second alternative return connection 14. This already results in four different connection variants.

A further flexibility of the connection geometries can be brought about by the fact that the shut-off or sealing components 11 and the valves 10 used in the connecting pieces 8, 9 can be interchanged. This is achieved by the fact that the connecting pieces 8, 9 are of identical design or that at least the internal threads are identical and equal dimensions in order to ensure an interchangeability of the valves 10 with the shut-off 11.

An additional increase in flexibility is ensured by the fact that even in the still free lower end of the radiator 1, here in Fig. 1 in the lower right corner area, a lateral connection piece 22 are provided. This serves as another alternative return connection. Also this connection 22 - and everyone further connecting pieces 22 - is ideally identical in construction to the upper connecting pieces 8, 9, but at least these connecting pieces 22 have identical dimensions and dimensions of the internal threads in order to be able to use shut-off components 11 there as well. This further increases the flexibility of the connection possibilities and the variability.

In Fig. 2a, 2b and 2c a very similar embodiment is shown, which in many parts of the embodiment of Fig. 1 equivalent. The only difference is in principle the shortened pipe connection 17.

In Fig. 3a and 3b a further embodiment is shown, in which the alternative second flow connection 13 is arranged in the left lower end region of the radiator 1. In this embodiment, the second alternative flow connection 13 via the pipe connection 17 is structurally not connected to the return housing 16, but both structurally and hydraulically laterally to the flow housing 15 and the heating medium can in this way either via the first flow connection 5 or via the second alternative flow connection 13 get into the riser 12. The further course of flow is analogous to that at Fig. 1 or 2.

In Fig. 4a, 4b and 4c a further embodiment is shown in which the second alternative flow connection 13 does not flow directly into the connection fitting 4, but is connected via a pipe connection 17 structurally and hydraulically directly to the riser 12. The pipe connection 17 accordingly opens just above the connection fitting 4 in the lowermost portion of the riser 12 and the heating medium flows in this way directly into the riser 12. The further flow is analogous here to the other embodiments.

In Fig. 5a and 5b Yet another embodiment is described in which in each case in the left and in the lower right corner region of the radiator 1 each alternate flow and return ports 13, 13 ', 14, 14' are provided. In principle, these are the embodiments of Fig. 2 and Fig. 3 provided at the same time. The second alternative flow connection 13 is structurally connected to the return housing 16, the third alternative flow connection 13 'via a further pipe connections 17' constructive to the flow housing 15. Hydraulically, both flow connections 13, 13 'connected to the riser 12. In this way, there is still a greater variety and variability and it can in this embodiment, three different Flow connections 5, 13, 13 'and three different return connections 6, 14, 14' are selected and combined with each other.

In the Fig. 6 . 7 and 8th an alternative variant of this embodiment is shown. In Fig. 6a and Fig. 7b are also sectional views through the connecting fitting 4 and through all flow ports 5, 13 'and 13 and return ports 6, 14, 14' shown. It can also be seen here how the pipe connection 17, via which the second alternative flow connection 13 is connected to the connection fitting 4, traverses the return flow housing 16 transversely and in this way represents the hydraulic connection to the flow or the riser pipe 12.

In this embodiment, the pipe connection 17 or 17 'respectively represents the mechanical and hydraulic connection between the second, or each further, alternative flow connection 13, 13' with the central connection fitting 4. The pipe connection 17, 17 'is here in two parts or Each has a releasable plug connection 19, 19 'or alternatively a fixed Bülstverschweißung, via which the connection can take place.

In the Fig. 9 to 14 further alternative radiators 1 are described. These each have only a single first room-side heating plate 2. With regard to their structural design and operation according to this radiator 1 of Fig. 9 to 14 largely the previously in the Fig. 1 to 8 radiators described 1. Fig. 9 corresponds approximately Fig. 1 . Fig. 10 corresponds to Fig. 2 . Fig. 11 corresponds to Fig. 3 . Fig. 12 corresponds to Fig. 4 . Fig. 13 corresponds to Fig. 5 and Fig. 14 corresponds to Fig. 8 , The reference numerals and the explanations are therefore adopted analogously and it will be discussed below only the differences:
So is in the single-layer embodiment according to the Fig. 9 to 14 formed the riser 12 as a straight, vertically upwardly extending pipe and not pivoted as in a two-layer radiator 1.

Furthermore, all the first and further flow connections 5, 13, 13 'and return connections 6, 14, 14' lie in a common plane parallel to the first heating plate 2. All these connections are equidistant from this heating plate 2.

Furthermore, the connecting pieces 8, 9, the lateral connecting pieces 22 and the first and further return connections 6, 14, 14 'are not as in the embodiments the Fig. 1 to 8 designed as T-shaped components with cross connections to both heating plates 2 and 3, but each have only one connection to the first heating plate 2.

Another difference is in the constructive leadership of the pipe joint 17, 17 '. This is in the radiators 1 of Fig. 1 to 8 Seen from above, it pivots laterally, and in contrast, it is in the radiator in Fig. 9 to 14 in a plan view from above straight and runs parallel to the heating plate. 2

The flow through these radiators 1 is analogous and although the heating medium flows through the first flow connection 5 or an alternative flow connection 13, 13 'to the distributor set 7 and from there via the connecting piece 8 with the valve 10 in the first heating plate 2. There, the heating medium distributed via the heating plate 2, decreases over the heating channels and leaves the radiator 1 via one of the return connections. For this purpose, the first return port 6, each further return port 14, 14 'or alternatively the lateral connecting port 22 or the end-side return port 23 are optionally available.

In the Fig. 15 a, b and c Another alternative radiator 1 is described. This radiator 1 is configured as a three-layer radiator 1 with parallel flow and has three mutually parallel heating plates (2,3,30): a first room-side heating plate 2, a second wall-side heating plate 3 and a third even closer to the room as the first heating plate. 2 With regard to its structural design and the mode of operation, this radiator 1 corresponds in principle to the radiators 1 described above, in particular the two-layer embodiments according to FIGS Fig. 1 to 8 , The reference numerals and the explanations are therefore assumed analogously. The third heating plate 30 is fluidically and structurally connected to the first heating plate 2 via pipes 24. These tubes 24 are arranged in the upper and lower corner regions and aligned with the transverse tubes of the connecting pieces 8, 9, the lateral connecting piece 22 and the return connection piece 23, 23 'aligned. The entire connection set 4 and the entire distributor set 7 are located between the first heating plate 2 and the second heating plate 3. The first flow port 5 and the first return port 6 and the second, and also each other, alternative flow port 13, 13 'and the second, and Each additional, alternative return connection 14, 14 'are likewise located between the heating plates 2, 3.

Claims (20)

1. A radiator (1) comprising at least one heating plate (2, 3, 30), preferably with a first room-side heating plate (2) facing the room to be heated, wherein a connection fitting (4) configured as a central port is provided with a first supply port (5) and a first return port (6), wherein the first supply port (5) and the first return port (6) are configured as supply and return housings (15, 16),
   wherein in each case a connecting piece (8, 9) configured as a connection point is connected in the lateral, upper end regions of the radiator (1) or of the heating plate (2, 3, 30), into which connecting piece a valve (10) for regulating the flow of the heating fluid coming from the first supply port (5) into the heating plate (2, 3, 30) and a shut-off or sealing component (11) for preventing the entry of heating fluid into the heating plate (2, 3, 30) and for preventing the flow of the heating fluid can be inserted or is inserted,
   wherein a distributor fitting (7) is provided with a defined riser pipe (12) which establishes a direct, in particular the only, connection for the heating fluid from the connection fitting (4) to the connecting pieces (8, 9),
   characterised in that
   at least a second alternative supply port (13) and at least a second alternative return port (14) are provided, wherein the second supply port (13) is connected in a fluid conducting manner to the connection fitting (4), so that heating fluid flowing in via the second supply port (13) enters the distributor fitting (7),
   and in that the second alternative supply port (13) is structurally connected via a pipe connection (17) on the return housing (16) of the first return port (6), in particular laterally connected thereto, wherein the pipe connection (17) passes through the return housing (16) of the first return port (6) and is hydraulically connected to the riser pipe (12).
2. The radiator according to claim 1, characterised in that supply or return housing (15, 16) are configured, designed at least partially in the form of a spherical section.
3. The radiator according to one of claims 1 or 2, characterised in that the riser pipe (12) is structurally connected in the region between the supply housing (15) of the first supply port (5) and the return housing (16) of the first return port (6).
4. The radiator according to one of claims 1 to 3, characterised in that the second alternative supply port (13) is structurally and hydraulically connected via a pipe connection (17) to the supply housing (15), in particular laterally in each case.
5. The radiator according to one of claims 1 to 4, characterised in that the second alternative supply port (13) is structurally and hydraulically connected via a pipe connection (17) directly to the riser pipe (12), in particular directly to the lowermost portion of the riser pipe (12) via the connection fitting (4).
6. The radiator according to one of claims 1 to 5, characterised in that a third alternative supply port (13') and a third alternative return port (14') are provided, wherein the third supply port (13') is also fluidically connected to the connection fitting (4), so that inflowing heating fluid enters the distributor fitting (7) via the third supply port (13').
7. The radiator according to claim 6, characterised in that the third alternative supply port (13') is structurally connected via a further pipe connection (17') to that free supply or return housing (15, 16) to which the second alternative supply port (13) is not connected.
8. The radiator according to one of claims 1 to 7, characterised in that the positions at which the second alternative supply port (13) and the third alternative supply port (13') are structurally connected to the supply or return housing (15, 16), lie in a common plane and on a common axis on opposite sides of the supply or return housing (15, 16) with respect to the longitudinal extent of the radiator (1).
9. The radiator according to one of claims 1 to 8, characterised in that the second and optionally the third alternative supply port (13, 13') and optionally the second and optionally the third alternative return port (14, 14') are respectively arranged in one of the lateral, lower end regions of the radiator (1).
10. The radiator according to one of claims 1 to 9, characterised in that the pipe connection (17, 17') comprises a detachable plug connection (19, 19') via which the second, and each further, alternative supply port (13, 13') and the second, and each further, alternative return port (14, 14') can be connected in a reversible detachable manner.
11. The radiator according to any of claims 1 to 10, characterised in that the riser pipe (12), viewed from the plane of the heating plate (2, 3, 30), is aligned centred, straight and vertical with respect to the longitudinal extent of the heating plate (2, 3, 30).
12. The radiator according to one of claims 1 to 11, characterised in that the second or third alternative supply port (13, 13') and the second or third alternative return port (14, 14') are structurally connected together to form a structural unit, in particular via a flat crosspiece (20).
13. The radiator according to one of the claims 1 to 12, characterised in that the second or third alternative return port (14, 14') is configured as a return housing (21), in particular designed at least partially in the form of a spherical section, and in each case has a front-side return port connector (23, 23') pointing laterally outwards.
14. The radiator according to one of claims 1 to 13, characterised in that the radiator (1) is designed as a two-layer radiator (1) with parallel flow and comprises exactly two, preferably mutually parallel, heating plates (2, 3), a first room-side heating plate (2) and a second wall-side heating plate (3), wherein optionally in each case a valve (10) can be inserted or is inserted in the connecting piece (8, 9) for regulating the flow and for parallel distribution of the heating fluid coming from the first supply port (5) into the two heating plates (2, 3), and a shut-off or sealing component (11) for preventing the entry of heating fluid into the two heating plates (2, 3) and/or the flow between the two heating plates (2, 3).
15. Radiator according to one of claims 1 to 13, characterised in that the radiator (1) is designed as a multilayer radiator (1) with parallel flow and comprises at least three, preferably exactly three, preferably mutually parallel, heating plates (2, 3, 30), a first room-side heating plate (2), a second wall-side heating plate (3) and a third heating plate (30) further towards the room side, wherein optionally in each case a valve (10) can be inserted or is inserted in the connecting piece (8, 9) for regulating the flow and for parallel distribution of the heating fluid coming from the first supply port (5) into the heating plates (2, 3, 30), and a shut-off or sealing component (11) for preventing the entry of heating fluid into the heating plates (2, 3, 30) and/or the flow between the heating plates (2, 3, 30).
16. The radiator according to claim 14 or 15, characterised in that the first supply port (5) and the first return port (6), and preferably also the second and each further alternative supply port (13, 13') and the second and each further alternative return port (14, 14'), and/or the entire connection fitting (4), and/or the distributor fitting (7), lie between the first and the second heating plate (2, 3).
17. The radiator according to one of claims 14 to 16, characterised in that the first supply port (5) and the first return port (6) are arranged in a plane eccentrically and unequally spaced from the first and second heating plate (2, 3).
18. The radiator according to one of claims 14 to 17, characterised in that the second and each further alternative supply port (13, 13') and the second and each further alternative return port (14, 14') are arranged in a plane, centrally and equidistant from the first and second heating plate (2, 3).
19. The radiator according to one of claims 1 to 18, characterised in that in one, preferably in each, free lower front-side corner region of the radiator (1), a lateral port connector (22) is provided as a further alternative return port.
20. The radiator according to one of claims 1 to 19, characterised in that all lateral or front-side ports and port connectors of the radiator (1), in particular the ports of the connecting pieces (8, 9), the lateral port connectors (22) and/or the return port connectors (23, 23') have the same dimensions, in particular the same inner diameter or thread dimensions, for the mutual, interchangeable insertion of valves (10) and/or shut-off or sealing components (11).

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