EP3524910B1 - Heating body and method for the production of same - Google Patents

Description

introduction

• mindestens zwei Anschlussquerschnitte,
• mindestens zwei Sammelkanäle sowie
• eine Mehrzahl von Heizkanälen,

wobei mittels der Anschlussquerschnitte der Heizkörper an einen Vorlauf und einen Rücklauf eines ein Heizmedium bereitstellenden Heizungssystems anschließbar ist, wobei sich die Heizkanäle zwischen den Sammelkanälen erstrecken und strömungstechnisch mit diesen verbunden sind, sodass das Heizmedium von einem der Sammelkanäle durch die Heizkanäle in den anderen Sammelkanal überströmen kann, wobei mindestens ein Heizkanal zumindest mittelbar in Wärme übertragender Weise mit mindestens einem Konvektorblech zusammenwirkt, wobei mindestens ein Heizkanal eine Vielzahl einzelner Konvektorbleche aufweist, die entlang einer Längsachse des Heizkanals verteilt angeordnet und mit einer Wandung des Heizkanals in Kraft übertragender Weise verbunden sind, wobei jedes der Konvektorbleche eine mit dem Heizkanal in Kontakt stehende Basis und mindestens einen Schenkel umfasst, der sich ausgehend von der Basis in eine von dem Heizkanal abgewandte Richtung erstreckt, wobei der mindestens eine Schenkel an einem der Basis abgewandten Ende einen Versteifungsabschnitt aufweist, wobei ein freies Ende des Versteifungsabschnitts auf einer der Basis abgewandten Seite des Schenkels angeordnet ist, wobei ein jeweiliges Konvektorblech von Aluminium und der Heizkanal von Stahl oder Aluminium gebildet sind.The present application relates to a radiator comprising

• at least two connection cross-sections,
• at least two collection channels as well
• a plurality of heating channels,

wherein the connection cross-sections allow the radiator to be connected to a flow and a return of a heating system providing a heating medium, with the heating ducts extending between the collecting ducts and being fluidically connected to them, so that the heating medium flows from one of the collecting ducts through the heating ducts into the other collecting duct at least one heating duct interacts at least indirectly in a heat-transferring manner with at least one convector plate, wherein at least one heating duct has a large number of individual convector plates which are distributed along a longitudinal axis of the heating duct and are connected to a wall of the heating duct in a force-transmitting manner, wherein each of the convector plates comprises a base which is in contact with the heating channel and at least one leg which extends from the base in a direction away from the heating channel, the at least one leg being attached to ei NEM end facing away from the base has a stiffening section, wherein a free end of the stiffening section is arranged on a side of the leg facing away from the base, wherein a respective convector plate is made of aluminum and the heating duct is made of steel or aluminum.

Furthermore, the present application relates to a method for producing such a heater.

A "collecting duct" is understood to mean a duct of the heating element which interacts in terms of flow with at least two other ducts. In particular, a collecting duct can interact with a large number of heating ducts, which are each connected to the collecting duct independently of one another. In other words, in such a configuration, the heating ducts are connected to the collecting duct in a manner of speaking in a parallel circuit.

A "heating duct" is understood in the sense of the present application as a duct through which the heating medium can flow, the primary function of which is to release the thermal energy stored in the heating medium to the ambient air of the radiator. Consequently, there is typically an attempt to make an effective surface of a heating channel comparatively large, so that in particular a convective heat exchange with the ambient air can take place. As a rule, a heating duct works together with a convector plate or some other device which is thermally connected to a wall of the heating duct and in this way drastically increases the surface area of the same. In the case of commercially available wall-mounted heaters, the heating channels can be incorporated, for example, in a heating plate, with the heating channels extending between two horizontally arranged collecting channels. Of course, it is also conceivable for the heating channels to have a different orientation, in particular a horizontal orientation. Tubular heating ducts are also conceivable, with flat tubes being used in particular in the case of so-called "heating walls", the width of which significantly exceeds their height.

An “at least indirect connection” between a heating duct and at least one associated convector plate means both indirect and direct connections in the context of the present application. A convector plate is typically connected directly to a wall of a respectively associated heating duct, so that heat transfer from the heating duct to the convector plate is possible in a particularly efficient manner. Nevertheless, it is also conceivable that the convector plate interacts only indirectly with the heating duct with the interposition of a connecting component.

In the context of the present application, “individual convector plates” are understood to mean convector plates that are separate from one another, at least in an assembled state in which they are not yet installed on the radiator. Furthermore, the convector plates can also be present separately and consequently independently of one another in a finished state of the radiator, in which they are connected in a force-transmitting manner to the heating duct. This mutually independent arrangement is then reflected in the fact that a direct transmission of forces from one convector plate to a respectively adjacent convector plate is not possible.

It is also conceivable that the convector plates are initially present separately before being mounted on the heating duct, are mounted on the heating duct in this state and are then coupled to one another, so that a direct exchange of forces between adjacent convector plates is made possible. Basically they are However, individual convector plates are not "in one piece" formed on a higher-level convector plate, as is known in the prior art. Instead, the convector plates continue to be “individually” within the meaning of the present application.

State of the art

Radiators of the type described above are already known in the prior art. In this regard, reference is made in particular to the following documents: DE 10 2009 055 177 A1 , DE 32 27 146 A1 and DE 199 21 144 B4 .

The known radiators each comprise a convector plate which is provided with a large number of convector sections. In other words, such a convector plate has a specific, repetitive shape, which is typically wavy or meandering, with each of the periodically repeating sections of the convector plate forming a convector section which, when mounted on the radiator, then together with the heating ducts forms a Convector channel forms. Convector sheets of this type are manufactured cyclically or continuously and cut to a specific length as required, so that the convector sheet can be connected to the heating ducts of the respective radiator. The convector plate is typically welded to the heating channels.

The disadvantage of the known radiators is that it is not possible to influence the number of convector channels formed on the heating channels, since this is determined solely by the shape of the convector plate. Thus, it is particularly conceivable that to ensure a certain heat output of a radiator there is a need to use a specific convector plate, but that this automatically results in a large number of convection ducts for the intended requirement is nevertheless superfluous. Although this is of course not detrimental to the intended heat output of the respective radiator, the arrangement of a convector plate in the radiator is always accompanied by an increase in the weight of the radiator and additional costs for its manufacture.

From the patent AT 256388B a process for the production of a radiator emerges, which is characterized by two process steps. In a first process step, individual convector sheets are welded onto a flat sheet. The convector plates each have a base, which is welded to the respective heating duct, and a leg, the latter extending in a direction away from the heating duct. In a second process step, the sheet metal with the welded convector sheets is bent into the desired shape of the heating channel.

The Japanese patent application JP 2002-168 470A describes an air conditioner which is provided with a plurality of convector plates consisting of a base and two legs. The convector plates are arranged in a heat-transferring manner via the bases on a heating duct of the air conditioning system and are bent at the end sections facing away from the heating duct, which form the legs of the convector plates.

Furthermore, from the FR 2 292 206 A1 a radiator with convector plates is known, the convector plates being plugged or pushed onto the heating ducts of the radiator

task

The present invention was based on the object of further developing a known radiator with regard to the stability of the same.

solution

Starting from the radiator of the type described above, the underlying object is achieved according to the invention in that each of the convector plates has a Z-shape, with each convector plate having a single, flat base with which it is in contact with the heating duct, the at least a leg has at least one stiffener, preferably a plurality of stiffeners, which extends or extend in a vertical direction of the leg, wherein the at least one stiffener protrudes or protrudes from the leg to the base and in this way creates a kink between the base and the leg stiffen or stiffened.

In the context of the present application, a “free end” is understood to mean an end of the convector plate that is not connected. In particular, there is no coupling of the convector plate to another object at this free end. The free end of the stiffening section is determined by that region of the stiffening section which faces away from the leg and is at the greatest distance from the leg.

The introduction of stiffening sections at the end of the convector plate facing away from the base leads in particular to improved stability of the same. In comparison to the prior art, the convector plates do not have a free end which extends in a direction away from the heating duct and is therefore freely accessible to a user. The introduction of stiffening sections thus causes also a reduced risk of injury. Furthermore, the stiffening sections are also particularly advantageous with regard to the optical design.

According to the invention it is provided that the at least one leg of a respective convector plate is equipped with at least one reinforcement, preferably a plurality of reinforcements. These stiffeners extend in the vertical direction of the leg, preferably starting from the base. Such stiffening can be present in particular in the form of embossing, which is introduced into the convector plate when the material is cold.

An advantageous embodiment of the radiator provides that the convector plate has a kink in a transition area between the leg and the stiffening section, with an angle between the leg and the stiffening section in a range between 0° and 179°, preferably in a range between 10° and 120°. With regard to the overlapping of the convector plates, it is particularly advantageous if the leg and the stiffening section are arranged at an angle of approximately 90° to one another, in order to achieve a scale-like arrangement of the convector plates.

Alternatively, it is also conceivable that a cross section of the stiffening section is formed in the shape of a circular arc. In contrast to a kink, the transition between the leg and the stiffening section is softer. A design above is particularly advantageous, particularly with regard to the action of force, which is necessary to deform the material.

The distribution of the convector plates along the longitudinal axis of the heating duct can be both regular and irregular. In other words, a distribution is conceivable in which the distances between adjacent convector plates are consistently the same. Alternatively, however, it is also conceivable that a distance between at least two adjacent convector plates differs from the distance between at least two other adjacent convector plates. Furthermore, a distribution both in the longitudinal and in the transverse direction in relation to the longitudinal axis of the respective heating channel is conceivable. In other words, it can be advantageous to align the bases of the convector plates of a respective heating duct perpendicularly or parallel to the longitudinal axis of the heating duct. This depends primarily on the orientation of the heating channels themselves, it being understood that warm air performs an upward movement and the convector plates together form appropriately oriented channels through which the air can flow.

The radiator according to the invention has many advantages. As can already be seen from the above description, there is a significant advantage in that the radiator can be equipped with any number of convector plates individually and in particular as required. The convector plates designed in the manner according to the invention each take up only a limited space on the associated heating duct, so that there is great freedom for the desired positioning of the convector plates. In particular, the convector plates can be arranged unevenly along the heating duct, whereby, for example, an increased concentration of convector plates can be made in a side area of the radiator, in which a convective heat exchange between the radiator and the environment is then also concentrated. It is also conceivable with vertically oriented heating channels, as they are typical with so-called "heating walls", that the convector plates are distributed differently over the height of the radiator, corresponding to a temperature distribution to be dissipated.

In comparison to the prior art, there is consequently no unconditional commitment to a predetermined number of evenly distributed convector channels with the radiator according to the invention, which must be formed with the choice of a respective convector plate on the radiator. By means of the individual equipment of a respective radiator with a desired number of convector plates, the mass of the later finished radiator can also be limited to a minimum. This is advantageous for effortless handling of the radiator during the installation of the same.

For this purpose, it is particularly advantageous if at least one heating duct equipped with convector plates, preferably all heating ducts, and the associated convector plates are made of aluminum as such. Aluminum has particularly good heat-conducting properties with a low specific mass.

As already indicated above, such a heater can also be advantageous in which two different pairs of convector plates, each formed by two adjacent convector plates, have different distances between their convector plates. For example, it is conceivable that there is a distance of 3 cm between a first and a second convector plate and then a distance of 5 cm between the second and an adjoining third convector plate. It goes without saying that the distances between adjacent convector plates can be selected as desired, since the convector plates are present individually according to the invention and are connected to the heating duct independently of one another—and can therefore be positioned individually.

A further particular advantage can result from a heater according to the invention, in which at least two heating ducts each have a large number of convector plates which are independent of one another. The advantage can be given by the fact that distances between adjacent convector plates on one heating duct differ from distances between adjacent convector plates on the other heating duct. In other words, different heating ducts can each be formed with a different number of convector plates, so that to a certain extent a “convector plate density” turns out to be different at different heating ducts. Such an embodiment can be useful, for example, when, due to the flow, different heating channels are flowed through with heating medium of different temperatures. It goes without saying that the heating duct that is subjected to a higher temperature can provide a higher energy output and should therefore be provided with a higher density of convector plates. Conversely, analogously, a heating duct through which comparatively cool heating medium flows can be provided with a smaller number of convector plates. Here, too, there is the advantage that only as many convector plates are formed on the radiator as are necessary for optimal energy exchange between the radiator and the room to be heated. As a result, both the use of materials and the mass of the finished radiator are reduced to the bare minimum.

In a particularly advantageous embodiment of the heater according to the invention, at least one convector plate, preferably all the convector plates, has only a single leg which extends from an edge of the base in the direction away from the heating duct. Preferably, the leg extends relative to the base at an angle of between 80° and 90°, with an angle approaching 90° preferably an angle of exactly 90° being optimal. An orientation of the leg that deviates from a strictly vertical arrangement of the leg relative to the base has the particular advantage that an assembly tool, by means of which the base of the convector plate is connected to the heating duct in a force-transmitting manner, has additional space on the side of the base facing away from the heating duct is available because the leg deviates sideways to a certain extent.

This is particularly significant when the respective convector plate is advantageously arranged on the heating channel by means of ultrasonic welding, since in this case a sonotrode of an ultrasonic welding device requires a certain amount of space. The connection of a respective convector plate with the heating duct by means of ultrasonic welding has the particular advantage that it is comparatively quick is possible, can be automated and, in addition, no significant temperature input takes place in the heating channel, which could otherwise lead to undesirable internal stresses in the material of the heating channel.

Basically, but especially with regard to a possible connection of the convector plates with a respective heating duct by means of ultrasonic welding, a material combination is advantageous in which a respective convector plate is made of aluminum and the heating duct is made of steel. The choice of aluminum for the convector sheets has the advantage of aluminum's particularly pronounced thermal conductivity properties and its low density. It goes without saying that other material combinations are of course also conceivable, in particular a construction of both the heating ducts and the convector plates each from aluminum.

In order to reduce the mass of the individual convector plates and thus the mass of the finished radiator to a minimum, it is also advantageous if each individual convector plate is made particularly thin, in particular a thickness of less than 0.2 mm, preferably less than 0 ,1mm. Such a material thickness is readily sufficient for the heat exchange function with the environment to be heated. However, the small thickness of the convector sheets can affect their stability.

In addition to the introduction of reinforcements, it can also be advantageous for the purpose of increasing the stability of a respective convector plate if the reinforcement section has at least one bend, preferably a plurality of bends, at a free end.

In order to significantly increase the static resistance of the individual convector plates, it is also conceivable for a length of the stiffening section, which is measured starting from the upper end of the leg facing away from the heating duct and parallel to the heating duct, to exceed a distance of the associated convector plate from the respective adjacent convector plate , so that the stiffening section of the convector sheet overlaps with the adjacent convector sheet. In this way, adjacent convector plates can be brought into direct contact with one another despite their isolated shape.

For a direct exchange of forces between adjacent convector plates, it is then still of particular advantage in this configuration if the convector plates are directly connected to one another. Such a connection is particularly conceivable when the individual convector plates across are aligned with the longitudinal axis of the heating duct, i.e. the bases of the convector sheets extend perpendicularly to the longitudinal axis of the heating duct. In particular, it is conceivable that the overlapping areas of the adjacent convector plates are coupled to one another in a materially, non-positively or form-fitting manner. In particular, the formation of a form fit is conceivable in that the respective adjacent convector plates are pressed together in an overlapping area.

If the bases of the convector plates are aligned parallel to the longitudinal axis of the respective heating duct, at least two convector plates of the heating duct, viewed in the width direction (or in the transverse direction) of the heating duct, are preferably arranged in such a way that they at least partially overlap, preferably are arranged completely next to each other. The arrangement of the convector plates parallel to the longitudinal axis on the heating duct is to be preferred, particularly in the case of vertically oriented heating ducts. The arrangement of several convector plates next to each other on the heating duct helps to significantly increase the convection surface created by the convector plates. Consequently, the convective heat exchange between the heating fluid and the air of the space to be heated can be increased.

In terms of process technology, the underlying object is achieved according to the invention in that at least two adjacent convector plates, preferably a plurality of respectively adjacent convector plates, are connected to one another in a force-transmitting manner after they have been individually connected to a respective heating duct, in particular with the formation of a form fit.

Advantageously, the convector plates are aligned relative to a mounting direction in such a way that the leg of a respective convector plate extends from an edge of the base facing the starting area of the heating duct. In other words, each convector plate to be connected to the heating duct is aligned prior to its connection to the heating duct in such a way that the leg faces the preceding convector plate already connected to the heating duct. Alternatively, it is also conceivable that the legs of the convector plates are aligned parallel to the longitudinal axis or parallel to the installation direction of the respective heating duct.

Using the procedure according to the invention, the convector plates can be arranged individually on the respective heating channel in a particularly simple and automated manner. In particular, the leg of a respective convector plate is subject to a further movement of an assembly tool in the assembly direction itself not in the way. This applies both to the alignment of the convector plates parallel to the longitudinal axis and to the alignment perpendicular to the longitudinal axis. More can be seen particularly well from the exemplary embodiments below.

In an advantageous embodiment of the method according to the invention, convector plates of two pairs of convector plates are each arranged at different distances from one another. In this way, a higher concentration of convector plates can be set at certain points in the respective heating duct as required; a consistently uniform distribution of convector plates is not absolutely necessary according to the invention.

exemplary embodiments

Fig. 1:

Eine perspektivische Ansicht einer Vorderseite eines Heizkörpers,

Fig. 2:

Eine perspektivische Ansicht einer Rückseite des Heizkörpers gemäß Figur 1,

Fig. 3:

Ein Detail eines Konvektorblechs für einen erfindungsgemäßen Heizkörper,

Fig. 4:

Einen Querschnitt durch einen Heizkanal im Moment der Verbindung eines Konvektorblechs gemäß Figur 3 mit dem Heizkanal,

Fig. 5:

Eine perspektivische Ansicht des mit einem Konvektorblechs ausgestatteten Heizkanals gemäß Figur 4,

Fig. 6:

Einen Querschnitt durch den Heizkanal gemäß Figur 4 im Moment der Verbindung eines zweiten Konvektorblechs mit dem Heizkanal,

Fig. 7:

Eine perspektivische Ansicht des mit zwei Konvektorblechen ausgestatteten Heizkanals gemäß Figur 6,

Fig. 8:

Einen Querschnitt durch den Heizkanal gemäß Figur 7 im Moment der Verbindung eines dritten Konvektorblechs mit dem Heizkanal,

Fig. 9:

Eine perspektivische Ansicht eines vollständig mit einer Vielzahl von Konvektorblechen ausgestatteten Heizkanals,

Fig. 10:

Einen Querschnitt durch einen Heizkanal im Moment der Verbindung eines dritten, alternativ ausgebildeten Konvektorblechs mit dem Heizkanal,

Fig. 11:

Eine perspektivische Ansicht eines Ausschnitts des Heizkanals gemäß Figur 10,

Fig. 12:

Einen Querschnitt durch ein Werkzeug im Moment der Verbindung zweier Versteifungsabschnitte benachbarter Konvektorbleche mittels Verpressen,

Fig. 13:

Eine perspektivische Ansicht eines mit einer Mehrzahl von alternativ ausgebildeten Konvektorblechen verbundenen Heizkanals,

Fig. 14:

Einen Querschnitt durch einen Heizkanal, der mit längsachsparallel ausgerichteten Konvektorblechen ausgestattet ist,

Fig. 15:

Eine perspektivische Ansicht des Heizkanals gemäß Figur 14,

Fig. 16:

Einen Querschnitt durch einen weiteren Heizkanal, der mit längsachsparallel ausgerichteten Konvektorblechen ausgestattet ist und

Fig. 17:

Eine perspektivische Ansicht des Heizkanals gemäß Figur 16.

The radiator according to the invention and the method according to the invention are explained in more detail below with reference to exemplary embodiments which are illustrated in the figures. It shows:

Figure 1:

A perspective view of a front of a radiator,

Figure 2:

A perspective view of a rear side of the radiator according to FIG figure 1 ,

Figure 3:

A detail of a convector plate for a radiator according to the invention,

Figure 4:

A cross-section through a heating duct at the moment of connecting a convector sheet according to figure 3 with the heating channel,

Figure 5:

A perspective view of the heating duct equipped with a convector sheet according to figure 4 ,

Figure 6:

A cross section through the heating channel according to figure 4 at the moment of connecting a second convector sheet to the heating duct,

Figure 7:

A perspective view of the heating duct equipped with two convector sheets according to figure 6 ,

Figure 8:

A cross section through the heating channel according to figure 7 at the moment of connecting a third convector sheet to the heating duct,

Figure 9:

A perspective view of a heating duct fully equipped with a large number of convector sheets,

Figure 10:

A cross section through a heating duct at the moment of connection of a third, alternatively designed convector plate with the heating duct,

Figure 11:

A perspective view of a section of the heating channel according to FIG figure 10 ,

Figure 12:

A cross section through a tool at the moment of connecting two stiffening sections of adjacent convector sheets by means of pressing,

Figure 13:

A perspective view of a heating channel connected to a plurality of alternatively designed convector plates,

Figure 14:

A cross-section through a heating duct equipped with convector plates aligned parallel to the longitudinal axis,

Figure 15:

A perspective view of the heating channel according to FIG figure 14 ,

Figure 16:

A cross section through another heating duct, which is equipped with convector plates aligned parallel to the longitudinal axis and

Figure 17:

A perspective view of the heating channel according to FIG figure 16 .

First is in the figures 1 and 2 a radiator 1 known in the prior art is shown, which is suitable, for example, for use with convector plates 8 . Such a heating element 1 comprises two connection cross-sections 2 , three collecting channels 3 , 4 and a large number of horizontally oriented heating channels 5 . The connection cross-sections 2 are arranged here together on a connection set 39 at a lower end of the radiator 1 and are used to connect the radiator 1 to a flow 6 and a return 7 of a heating system, not shown. It goes without saying that one of the connection cross-sections 2 can interact with the flow 6 and the other with the return 7 . In the example shown, the connection fitting 39 interacts with a lower, horizontally extending collecting channel 4 . This collecting duct 4 has a blocking element (not shown) in its middle region, which prevents the heating medium from directly overflowing from the flow 6 to the return 7 or a short circuit between the connection cross sections 2 .

The collecting channel 4 is fluidically connected to a vertical collecting channel 3 in its section associated with the flow 6 . The heating medium provided via the flow 6 thus flows, starting from the flow 6 , into the lower collecting duct 4 and then into the vertical collecting duct 3 , in which it rises. Starting from the collecting duct 3 , the heating medium flows into the heating ducts 5 , which are each individually fluidically connected to the collecting duct 3 . In other words, the heating channels 5 are connected in parallel to a certain extent. The heating medium then flows through the individual heating channels 5 in the direction of an opposite collecting channel 3 which also extends vertically. In this collecting channel 3 flows the heating medium then back to the lower collecting channel 4 or its section associated with the return 7 . Finally, the heating medium is fed to the return line 7 and thus back to the heating system via the lower collecting channel 4 . It goes without saying that the temperature of the heating medium is continuously reduced as it flows through the heating element 1 since the thermal energy of the heating medium is given off to the environment in particular by means of the heating channels 5 . The energy input into the environment takes place mainly by means of thermal radiation and convection.

A heater 1 of this type—of course, but also any other conceivable heater—in one embodiment according to the invention comprises a multiplicity of convector plates 8 . A single convector sheet 8 is, for example, in figure 3 shown. It comprises a lower base 9 associated with a respective heating channel 5 , a leg 10 extending from the base 9 , and a stiffening portion 40 disposed at an upper end 17 of the leg applied to the base 9 . A longitudinal axis 37 of the base 9 is oriented here perpendicularly to a longitudinal axis 22 of the associated heating channel 5 or parallel to a width direction 38 of the heating channel 5 . In the example shown, the leg 10 extends from an edge 13 of the base, the convector plate 8 being provided with a kink 24 at the edge 13 . Starting from the base 9 , the leg 10 extends in a direction away from the heating channel 5 . In the example shown, the leg 10 and the base 9 together enclose an angle 14 which is approximately 80° here. The purpose of this design, which deviates from a vertical configuration of the angle 14 , becomes clear in connection with the following explanation figure 4 .

The leg 10 has a kink 18 at an upper end 17 thereof. The stiffening section 40 of the convector plate 8 then extends from this upper end 17 , at the end of which facing away from the leg 10 the convector plate 8 has a free end 11 . In the example shown, the leg 10 and the stiffening section 40 together enclose an angle 41 which is approximately 90° here. The stiffening section 40 ensures that the leg 10 is not twisted relative to the base 9 unintentionally.

In the example shown, the convector sheet 8 is formed from an aluminum sheet that has a thickness of approximately 0.1 mm. In the example shown, the heating channels 5 are made of steel. It goes without saying that the convector plate 8 as such has a comparatively low stability due to its particularly thin design. In order to increase this, the convector plate 8 has a plurality of reinforcements 15 , 23 , which are the legs 10 are introduced. In the example shown, the reinforcements 15 , 23 extend parallel to a vertical direction 16 of the leg 10 . The reinforcements 23 protrude from the leg 10 to the base 9 and in this way reinforce the kink 24 between the base 9 and the leg 10 . This also ensures that the leg 10 does not twist unintentionally relative to the base 9 .

The convector plate 8 formed in this way can be arranged on a heating duct 5 in a particularly simple manner. As an example, a connection is made here by means of ultrasonic welding, which in particular consists of figure 4 results. For this purpose, the convector plate 8 according to figure 3 positioned with its base 9 on a respective heating channel 5 and then its base 9 is welded to the heating channel 5 at a total of two welding points 26 by means of a sonotrode 25 . In this way, a large number of convector plates 8 can be connected individually to the heating channel 5 without further ado. Alternatively, for example, a linear weld seam is also conceivable, which can be produced with a disk-shaped or plate-shaped sonotrode. According to the illustration figure 4 the technical purpose of the angle 14 of less than 90° now also arises: by means of the oblique orientation of the leg 10 relative to the base 9 , a free space facing the base 9 is created in which the sonotrode 25 finds sufficient space to connect of the convector plate 8 to be used with the heating channel 5 . A state of the convector plate 8 connected to the heating duct 5 can be seen particularly well from the perspective illustration according to FIG figure 5 . This representation shows that the convector plate 8 is welded to the heating duct 5 by means of two weld points 26 . In the example shown, the heating channel 5 is designed in the form of a flat tube, through the inner cavity 27 of which the heating medium can flow. Due to the direct connection of the convector plate 8 to the heating duct 5 , a particularly efficient heat transfer from the heating medium to the convector plate 8 and finally by convection to the environment to be heated can finally take place. If a sonotrode is used whose dimensions are small enough, an embodiment of the angle 14 of 90° is generally to be preferred.

In the course of equipping the heating duct 5 with a large number of convector plates 8 , a further convector plate 8 is welded to the heating duct 5 in a subsequent processing step. This is particularly evident from figure 6 . For this purpose, another convector plate 8 is arranged on a side facing away from the leg 10 of the first convector plate 8 and then again connected to the heating channel 5 at two welding points 26 by means of the sonotrode 25 . Here, the second convector sheet 8 positioned at a distance 12 from the first convector plate 8 . This distance 12 is selected to be smaller here than a length 33 of the stiffening section 40 of the convector plates 8 measured parallel to the longitudinal axis 22 of the heating duct 5 . Since the length 33 therefore exceeds the distance 12 , there is an overlapping area 28 in which the stiffening section 40 of the second convector plate 8 intersects with the stiffening section 40 of the first convector plate 8 . In this overlapping area 28 , if required, the convector plates 8 , which are basically present individually, can be coupled to one another in a force-transmitting manner, in order to thus produce mutual reinforcement. This is explained separately below.

After the second convector sheet 8 has been welded to the heating duct 5 , the latter finally comprises two convector sheets 8 . This is particularly evident from the representation according to FIG figure 7 . From now on, the heating channel 5 can be provided with any number of convector plates 8 in the same way, with distances between adjacent convector plates 8 being freely selectable. The arrangement of the individual convector plates 8 takes place in a mounting direction that extends from a starting area 19 of the heating duct 5 in the direction of an opposite end area 20 . The assembly direction is therefore oriented parallel to the longitudinal axis 22 of the heating channel 5 . The setting of a third convector plate 8 - again at a distance 12 to the preceding second convector plate 8 - is an example in figure 8 shown. As a result of a complete processing of a heating channel 5 , the same is equipped with a large number of convector sheets 8 . Such a finished heating channel 5 is shown in the illustration according to FIG figure 9 . There it is likewise illustrated by way of example that between two centrally arranged, adjacent convector plates 34 there is a distance 21 which clearly exceeds the distances 12 chosen between the convector plates 8 in other respects. In the example shown, two packs of convector plates 8 are formed on the heating duct 5 , so to speak. In this context, it should be pointed out again that the distances between adjacent convector plates 8 can in principle be freely selected, since each convector plate 8 is set individually.

As already indicated above, there is the possibility of producing a connection in the overlapping area 28 of the stiffening sections 40 of adjacent convector plates 8 , so that a direct transmission of forces between the adjacent convector plates 8 is possible. For this purpose, it is conceivable, for example, to press the stiffening sections 40 together using a tool 29 so that a form-fitting connection is established. This is an example in figure 10 shown. To produce the form-fitting connection, a stamp 35 is pushed in the direction of the in figure 10 shown arrow 30 pressed in the overlapping area 28 against the stiffening sections 40 of the adjacent convector plates 8 . Since the material of the convector plates 8 in the area of the stamp pressure is prevented laterally by cheeks 36 from deflecting in an uncontrolled manner, a dedicated form-fitting point 31 is formed in the stiffening sections 40 . As the stamp 35 is pressed onto the stiffening sections 40 , the cheeks 36 are moved laterally away from one another in the direction of the arrows 32 in order to give the material of the stiffening sections 40 room to deform.

In a second embodiment, in the Figures 11 to 13 is shown, a modified type of convector plates 8 is used as an alternative to the convector plates 8 according to the above description, the stiffening sections 40 of which are not elongated in the same way, but are brought into a U-shape by means of a further kink 18 . This is particularly good based on the representation according to figure 11 recognizable. The different design of the stiffening section 40 means that adjacent convector plates 8 do not form an overlapping area 28 and consequently cannot be connected directly to one another. The introduction of the further kink 18 has the advantage that the respective convector plate 8 is additionally reinforced in the area of its stiffening section 40 .

As alternative embodiments show the Figures 14 to 17 Heating ducts 5 , which are also equipped with a plurality of convector plates 8 . In contrast to the above embodiments, however, the convector plates 8 are oriented parallel to the longitudinal axes 22 of the heating channels 5 here. Such an embodiment is particularly advantageous when the respective heating channel 5 is oriented vertically, so that a convective air flow can rise along the heating channel 5 .

In the one embodiment shown in the figures 14 and 15 is shown, the individual convector plates 8 are arranged one behind the other along the heating channel 5 . An assembly of the convector plates 8 is comparable to the assembly of the convector plates 8 according to the above-described embodiments according to FIG Figures 1 to 13 away. Thus, the convector plates 8 are each connected individually to a wall of the heating duct 5 , in particular by means of ultrasonic welding at points or in a line. The sonotrode or sonotrodes move from convector plate 8 to convector plate 8 relative to the heating channel 5 parallel to its longitudinal axis 22 .

In the in the figures 16 and 17 In the exemplary embodiment shown, two mutually parallel rows of convector plates 8 are arranged next to one another on a heating duct 5 in a width direction 38 of the heating duct 5 extending perpendicularly to the longitudinal axis 22 of the heating duct 5 . By means of such an arrangement, a heat transfer from the heating fluid to the air in the room to be heated can take place more effectively, since a convectively effective heat transfer surface formed by convector plates 8 compared to, for example, the design according to the figures 14 and 15 is significantly enlarged.

In principle, and independently of any other design of a heating element 1 according to the invention, it is conceivable to combine differently designed convector plates 8 on one and the same heating duct 5 . Furthermore, the formation of elongated convector plates 8 is conceivable, the length of which clearly exceeds the width of a heating channel 5 . Such convector plates 8 can extend perpendicularly to the longitudinal axis 22 of the respective heating duct 5 and thus bridge a free space between adjacent heating ducts 5 . In this way, the convector plates 8 can be connected to a plurality of heating ducts 5 arranged next to one another or one above the other. The advantage according to the invention of a free choice of distance between adjacent convector plates 8 remains unchanged as a result.

Reference List

1

radiator

2

connection cross-section

3

collection channel

4

collection channel

5

heating channel

6

leader

7

return

8th

convector sheet

9

Base

10

leg

11

free end

12

Distance

13

edge

14

angle

15

stiffening

16

vertical direction

17

End

18

kink

19

initial range

20

end area

21

Distance

22

longitudinal axis

23

stiffening

24

kink

25

sonotrode

26

spot weld

27

cavity

28

overlap area

29

Tool

30

Arrow

31

Form closure point

32

Arrow

33

length

34

convector sheet

35

Rubber stamp

36

cheek

37

longitudinal axis

38

latitude direction

39

connection set

40

stiffening section

41

angle

Claims (14)

1. A radiator (1), comprising

   - at least two connection cross-sections (2),

   - at least two collection channels (3, 4), and

   - a plurality of heating channels (5),

   wherein by means of the connection cross-sections (2), the radiator (1) can be connected to a flow (6) and a return (7) of a heating system providing a heating medium,

   wherein the heating channels (5) are fluidically connected to the collection channels (3) so that the heating medium can flow from one of the collection channels (3) through the heating channels (5) into the other collection channel (3),

   wherein at least one heating channel (5) cooperates at least indirectly in a heat-transferring manner with at least one convector plate (8),

   wherein at least one heating duct (5) comprises a multiplicity of individual convector plates (8) which are arranged distributed along a longitudinal axis (22) of the heating channel (5) and are connected to a wall of the heating channel (5) in a force-transmitting manner,

   wherein each of the convector plates (8) comprises a base (9) in contact with the heating channel (5) and at least one leg (10) which, starting from the base (9), extends in a direction away from the heating channel (5),

   wherein the at least one leg (10) has a stiffening portion (40) at an end facing away from the base (9), wherein a free end (11) of the stiffening portion (40) is arranged on a side of the leg (10) facing away from the base (9), wherein a respective convector plate is formed from aluminum and the heating channel is formed from steel or aluminum,

   characterized in that each of the convector plates (8) has a Z-shape, wherein each convector plate (8) has a single, planar base (9) with which it is in contact with the heating channel (5), wherein the at least one leg (10) has at least one stiffener (15, 23), preferably a multiplicity of stiffeners (15, 23), which extends or extend in a vertical direction (16) of the leg (10), wherein the at least one stiffener (23), starting from the leg (10), projects or project to the base (9) and stiffens or stiffen in this manner a kink (24) between the base (9) and the leg (10).
2. The radiator (1) according to claim 1, wherein the convector plate (8) has a kink in a transition region between the leg (10) and the stiffening portion (40), wherein an angle (41) between the leg (10) and the stiffening portion (40) lies in a range between 0° and 179°, preferably in a range between 10° and 120°.
3. The radiator (1) according to claim 1 or 2, wherein longitudinal axes (37) of the bases (9) of the convector plates (8) of a respective heating channel (5) are aligned perpendicular or parallel to the longitudinal axis (22) of the associated heating channel (5).
4. The radiator (1) according to any one of the claims 1 to 3, wherein distances (12) measured parallel to the longitudinal axis (22) of the respective heating channel (5) between edges (13) of adjacent convector plates (8) of at least two convector plate pairs each formed by two adjacent convector plates (8) are different.
5. The radiator (1) according to any one of claims 1 to 4, wherein at least two heating channels (5) each have a multiplicity of the convector plates (8) that are independent of each other, wherein distances (12) measured parallel to the longitudinal axis (22) of the respective heating channel (5) between edges (13) of adjacent convector plates (8) of one heating channel (5) differ from distances (12) between edges (13) of adjacent convector plates (8) of the other heating channel (5).
6. The radiator (1) according to any one of claims 1 to 5, wherein at a free end (11), the stiffening portion (40) has at least one kink (18), preferably a plurality of kinks (18).
7. The radiator (1) according to any one of the claims 1 to 6, wherein longitudinal axes (37) of the bases (9) of the convector plates (8) are each aligned perpendicular to the longitudinal axis (22) of the respective heating channel (5), wherein a length (33) of the stiffening section (40), which is measured starting from the upper end (17) of the leg (10) facing away from the heating channel (5) and parallel to the heating channel (5), exceeds a distance (12) of the associated convector plate (8) from the respective adjacent convector plate (8), so that the stiffening portion (40) of the convector plate (8) overlaps with the adjacent convector plate (8).
8. The radiator (1) according to any one of claims 1 to 7, wherein the convector plates (8) cooperating with a respective heating channel (5) are directly connected to each other.
9. The radiator (1) according to any one of claims 1 to 8, wherein the bases (9) of the convector plates (8) are aligned parallel to the longitudinal axis (22) of the respective heating channel (5), wherein at least two convector plates (8) of the heating channel (5), viewed in a width direction (38) of the heating channel (5) extending perpendicular to the longitudinal axis (22), at least partially overlap, are preferably arranged completely next to each other.
10. A method for producing a radiator (1) according to any one of claims 1 to 9, wherein starting from a starting region (19) of the heating channel (5), a multiplicity of individual convector plates (8) of a heating duct (5) are successively connected to a wall of the heating channel (5) in an assembly direction towards an end region (20) opposite the starting region (19) characterized in that
    at least two adjacent convector plates (8), preferably a plurality of convector plates (8) which are adjacent in each case, are connected to one another in a force-transmitting manner after their individual connection to a respective heating channel (5), in particular by forming a form fit.
11. The method according to claim 10, wherein the connection is made by means of a forming process, wherein preferably at least one stiffening portion (40) of a convector plate (8) is pressed together with stiffening portion (40) of an adjacent convector plate (8).
12. The method according to claim 10 or 11, wherein the longitudinal axes (37) of the bases (9) of the convector plates (8) are aligned perpendicular or parallel to the longitudinal axis (22) of the respective heating channel (5).
13. The method according to any one of claims 10 to 12, wherein adjacent convector plates (8) of at least two convector plate pairs, each comprising two adjacent convector plates (8), are connected to the heating channel (5) at distances (12, 21) differing from one another.
14. The method according to any one of claims 10 to 13, wherein the convector plates (8) are connected to the respective heating channel (5) by means of ultrasonic welding.

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