WO2006128684A1

WO2006128684A1 - Heating body

Info

Publication number: WO2006128684A1
Application number: PCT/EP2006/005178
Authority: WO
Inventors: Hans-Peter Bierbaumer
Original assignee: Hydrogen Research Aktiengesellschaft
Priority date: 2005-06-01
Filing date: 2006-05-31
Publication date: 2006-12-07
Also published as: EP1888992A1; AT501943A1; ATE427467T1; EP1888992B1; RU2007149516A; DE502006003328D1

Abstract

The invention describes a heating body (2) having at least one hollow profile (1), through which a thermal transfer medium flows and which comprises a front wall (3) and a rear wall (4) which is arranged at least partially at a spacing (10) from the former, which walls (3, 4) are connected to one another by two side walls (5, 6) with the formation of at least one channel (9), and having at least one inlet (7) and one outlet (8) for the thermal transfer medium, and optionally lamellae (12) which are arranged on the hollow profile (1) in order to improve the dissipation of heat. The maximum spacing (10) between the front wall (3) and the rear wall (4) is selected from the range having a lower limit of 1 mm and an upper limit of 5 mm.

Description

radiator

The invention relates to a radiator with at least one, of a heat transfer medium flowed through hollow profile, which consists of a front wall and at least partially spaced rear wall, which are interconnected by two side walls to form a channel, and each with at least one inlet and one Drain for the heat transfer medium.

Known radiators, which are mainly used for space heating, usually consist of a flat sheet metal housing, which is flowed through by warm water and whose heat radiates through a corrugated sheet-like corrugated wall of this panel radiator.

Such a heating element is e.g. known from DE 297 18 876 Ul. The latter has a part through which a flowing, heat-transferring medium flows and a heat-dissipating part, wherein the heat-transferring part is designed to be connectable to a pipe or the like pipe leading the flow medium. A flat profile containing a flow channels has clamping elements integrally formed on at least one outer surface for parts which can be connected to them as temperature-dissipating parts. The radiator, i. its flat profile or the lamellar inserts are made of a light metal alloy and are produced by extrusion. The flat profile consists of two spaced-apart profile walls and connecting them with the flow channels limiting, approximately parallel transverse walls. In order to create the largest possible heat-transmitting surface, short rib strips are formed on the inner surfaces within the channels of this radiator. Furthermore, depending on the required performance of the space heater several of these flat profiles can be arranged in alignment with each other.

Based on this prior art, it is the object of the present invention to further improve such a radiator to the effect that this causes at least the same heating power lower manufacturing costs.

This object of the invention is achieved in that the distance between the front wall and the rear wall of the hollow profile is selected from a range with a lower limit of 1 mm and an upper limit of 5 mm. The radiator has so much small clear width, it was surprisingly found that despite this small flow cross-section, an improved heat exchange and thus improved heating performance is obtained. The reason for this is probably to be found in the fact that due to the small flow cross-section, at least a large part of the heat transported by the heat transfer medium is transferred to the walls delimiting the flow channel, that is to say, not unnecessarily heat in the circulation, as in conventional central heating the case is being transported. Due to the reduced distance between the front and rear wall of the hollow profile, not only a more compact construction of the radiator is possible and thus a less inconspicuous installation in a room to be heated, if necessary, this radiator can even be designed as a wall panel, but it is also the To achieve an advantage that it responds very quickly and thus in a very short time, the space heating is possible. As a result of this rapid space heating, it is possible, in particular in the case of low or low energy houses, to shorten the pumping times for the circulation of the heat transfer medium, eg of the heating water, by the more efficient heat transfer or heat exchange, and consequently in the consequence To save energy. Furthermore, as a result, the heating times of the boiler or the heat-generating heat generator can be reduced, so that overall the operating times of the heating system can be shortened and thus the maintenance intervals are extended accordingly.

In order to further improve these effects, it is possible that the distance between the front wall and the rear wall of the hollow profile is selected from a range with a lower limit of 2 mm and an upper limit of 4 mm, or according to another embodiment, this variant Distance 3 mm.

Between the transverse walls of the hollow profile, the front wall can be arranged with the rear wall connecting at least one further web to form at least one further channel. Thus, a multi-channel system is created in the profile, whereby the flow cross-section of a single channel is further reduced and thus the heat transfer can be made more efficient and it is also possible through this training, with a corresponding connection of flow or return with only one hollow section a snake - or meandering flow through the radiator to produce. With the at least one web, the compressive strength of the hollow profile and thus the be improved mobility of the radiator.

This at least one web can have a wall thickness selected from a range with a lower limit of 0.35 mm and an upper limit of 1 mm. Due to this very small wall thickness of the at least one web, heat transfer into the respective laterally adjacent channels is possible, in particular in the case of meander-shaped flow guidance-in addition to the heat transfer through heat conduction into the room air-so that a homogenization of the temperature profile of the hollow profile can be achieved and thus also a correspondingly uniformed radiating surface of the radiator. This can be achieved so that the heat transfer from the "hot inlet into the" cold drain within a hollow section is made possible.

To further enhance this behavior, the at least one web can have a wall thickness selected from a range with a lower limit of 0.4 mm and an upper limit of 0.8 mm, or the wall thickness of the at least one web can be 0.5 mm be.

To increase the compactness of the radiator, it is advantageous if the channels are arranged directly next to one another in the hollow profile. Due to the side-by-side arrangement of the channels, these cover virtually the entire surface of the hollow profile, which is available for heat transfer and can thus be achieved with respect to this area a higher efficiency.

The number of channels in the hollow profile can be selected from a range with a lower limit of 15 and an upper limit of 40, or according to a further embodiment thereof with a lower limit of 20 and an upper limit of 30, in particular, the number of Channels in the hollow section 24 amount. By this number of channels, the response of the radiator can be further improved, in particular so that several channels can already be connected to the inlet, so that already at the inlet of the heat transfer medium in the radiator a correspondingly large area for heat transfer and thus a correspondingly high efficiency can be achieved ,

It is advantageous if the width of the channels is selected from an area with a lower limit of 1.5 mm and an upper limit of 5 mm, or if the width of the channels is selected from a range with a lower limit of 2 mm and an upper limit of 3, 5 mm and 3 mm, respectively the width of the channels is 2.2 mm, so that due to this reduced flow cross-section virtually no "core flow" is formed which flows unused through the channels of the hollow profile.

In order to further increase the efficiency of the Heizköpers, it is possible that the width of the channels in the direction of the front wall is smaller than the distance of the front wall of the rear wall, as can be obtained correspondingly favorable flow conditions.

The hollow profile may have a width selected from a range having a lower limit of 40 mm and an upper limit of 400 mm, or the width may be selected from a range having a lower limit of 80 mm and an upper limit of 250 mm , or the hollow profile may have a width of 100 mm, so that the radiator is adaptable to the desired heating power by the optional multiple arrangement of hollow sections in the radiator.

In order to facilitate the heat exchange with the ambient air, i. the room air, or in order to create the possibility to use materials that have a medium Wärmeleitfähig- (compared with aluminum materials), it is advantageous to form the front wall and / or rear wall and / or the side walls with a wall thickness, which is selected from a range with a lower limit of 0.5 mm and an upper limit of 1.5 mm.

To further enhance these possibilities, it is advantageous to select the wall thickness of the front wall and / or rear wall and / or the side walls from a range with a lower limit of 0.75 mm and an upper limit of 1, 2 mm or the wall thickness 0.9 mm.

As already mentioned, it is possible to vary the heating power to provide a plurality of hollow sections to form a channel system via manifolds fluidly connected to each other in the radiator. In this case, the flow connection can be made via the opposite open profile ends of the hollow sections, so that therefore additional Built-in hollow profile can be dispensed with. In addition, it is thus possible, as known per se, to provide only an inlet and a drain at the radiator.

The flow connection can be designed so that the heat transfer medium flows through the channel system meandering, so that this travels the longest possible path through the radiator before it leaves this again through the flow and thus a correspondingly long period for heat exchange is available.

Because the front wall and the rear wall are arranged at least approximately parallel to one another, it is possible to form the channels at least approximately with the same flow cross section.

The cross-section of the channels may be rectangular, square, round, trapezoidal, rhomboid, diamond-shaped or triangular, with mixed forms within a radiator are also possible, for example, to influence the flow behavior positively or to keep power losses due to the resulting pressure gradient as low as possible ,

The hollow profile itself can be extruded, since it can be used on a standardized method for the production of hollow sections and the manufacturing costs can be reduced by a manageable mass production. Moreover, it is with the

Extrusion process in a simple manner possible to produce the hollow profile according to the invention with the small distance of the front wall of the rear wall with a correspondingly high dimensional accuracy and without much Nachbearbeitungsaufwand. By extrusion, it is also possible to easily produce the hollow sections with virtually any length.

It is further advantageous if the hollow profile has been subjected to deformation after extrusion to reduce the distance between the front and rear walls, in particular cold working, e.g. Pressing or rolling, since this means that the extruded hollow profiles are in principle of larger flow cross-section, i. greater distance between the front and rear walls and can be produced as a result of higher dimensional accuracy.

It is also possible between the hollow profiles and the inlet and outlet each a collection provide line, said manifolds may be connected by at least one bend with the inlet and outlet, whereby the inlet or outlet in the rear region of the Heizköpers, ie invisible from the visible side of the radiator, can be arranged.

It is also advantageous if the hollow profile is formed of aluminum or an aluminum alloy, since these materials are known for their high conductivity and thus the efficiency of the radiator can be further improved.

Finally, it is also possible to provide a plurality of hollow profiles, wherein these hollow profiles are arranged in particular at least approximately perpendicular to a length of the radiator, that is substantially lamellar, whereby the efficiencies can be further increased by the resulting between the "fins" forced convection.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures, but these are not limiting representations.

Each shows in a highly schematically simplified representation:

1 shows a first embodiment of a hollow profile for a radiator according to the invention in an oblique view.

2 shows a section of a variant of the hollow profile in an oblique view with a plurality of channels.

Fig. 3 is a hollow profile in plan view with diamond-shaped channels;

Fig. 4 shows the arrangement of four hollow sections in a radiator;

5 shows a hollow profile in plan view with lamellae arranged thereon for heat transfer;

Fig. 6 the detail of a hollow profile with lateral collecting channel cut in side view; Figure 7 shows the integration of several hollow sections in a manifold.

8 shows an embodiment variant for the integration of the hollow profiles into a collecting line;

9 shows a further embodiment variant for incorporating the hollow profiles in a collecting line;

10 shows a further embodiment variant for incorporating the hollow profiles into a collecting line;

11 shows an embodiment variant of the radiator with a schematically illustrated meander-shaped flow pattern of the heat transfer medium;

12 shows a variant of the hollow profile in front view;

FIG. 13 an embodiment variant of the hollow profile in front view; FIG.

Fig. 14 shows a variant of the hollow profile in front view.

By way of introduction, it should be noted that the location information chosen in the description, such as the top, bottom, side, etc. related to the immediately described and illustrated figure and to be transferred to a new position analogously to the new situation. Furthermore, individual features or combinations of features from the various exemplary embodiments shown and described can also represent separate, inventive or inventive solutions.

1 shows a hollow profile 1 for a radiator 2 (see, for example, Fig. 7), which comprises a front wall 3, a rear wall 4 and two side walls 5, 6. In this embodiment variant of the hollow profile 1, the front wall 3 and the rear wall 4 are of planar design and at least approximately parallel to one another. Likewise, the two side walls 5, 6 are formed at least approximately parallel to each other and planar.

In the two side walls 5, 6 is in each case a connection for an inlet 7 and a Ab- run 8 provided for a heat transfer medium. Of course, the inlet 7 and the outlet 8 can be arranged in only one of the side wall 5, 6 or it is also possible to arrange this inlet 7 and / or outlet 8 in the front wall 3 and / or rear wall 4 as needed.

The hollow profile 1 is provided with only one channel 9, in which the heat transfer medium of this hollow profile 1 flows through, while the heat, which in a heat source, e.g. a burner boiler according to the prior art, is transmitted to the front wall 3 and / or rear wall 4 and / or the side walls 5,6,

The hollow profile 1 is preferably made of a material, in particular metal, formed with high thermal conductivity, in particular it consists of aluminum or an aluminum alloy. The hollow profile can thus be made very light, for example, have a weight which is selected from a range with a lower limit of 0.5 kg / m and an upper limit of 0.75 kg / m, for example, the weight 0.66 kg / m.

By using an aluminum material for the radiator 2, this is relatively easy. In addition, it has a fast response, so that after a short time a correspondingly large amount of heat has been transferred to the room air. Furthermore, it is possible with the radiator 2 according to the invention, in particular since its clear width, so the flow cross-section, is relatively low to heat the heat transfer medium to a higher temperature, since the registered heat is transferred very quickly into the aluminum material and thus introduced into the room air , Due to this rapid response, it is possible to dispense with conventional lamellae known from the prior art for enlarging the heat-transferring surface, although these can of course be arranged.

According to the invention, it is provided that a distance 10, ie in this case the clear width of the channel 9, is relatively small, in particular selected from a range with a lower limit of 1 mm and an upper limit of 5 mm. It is thus achieved a very small flow cross-section for the heat transfer medium, so that its heat evenly on the channel 9 surrounding the front wall 3, rear wall 4 and sides walls 5, 6 transmits and in the heat transfer medium itself substantially inside no central Flow is formed, in which the heat is practically unused by the heat transfer medium in circulation. To avoid this, theoretically there is the possibility of making the radiator 2 over a large area, so that therefore a long flow path through the channels 9 of the radiator 2 must be covered and thus the heat can be transferred from these central areas to the corresponding walls. In the case of the radiator 2 according to the invention, this is not necessary, so that this radiator 2 can be made relatively compact and thus at least approximately constant heating power compared to radiators from the prior art, the formation of a radiator 2 is possible in a room practically in the background occurs.

Preferably, this hollow section 1 is produced by extrusion of aluminum or an aluminum alloy. This has the advantage that it can be used to produce a hollow profile 1 with very thin walls, so that in turn the heat transfer, i. the heat exchange from the heat transfer medium to the ambient air surrounding the radiator 2, is made possible. Preferably, the front wall 3 and / or rear wall 4 and / or the two side walls 5, 6 has a wall thickness 11, which is selected from a range with a lower limit of 0.5 mm and an upper limit of 1, 5 mm.

To further improve the heat transfer, this wall thickness 11 can be further reduced, in particular be selected from a range with a lower limit of 0.75 mm and an upper limit of 1, 2 mm. The wall thickness 11 for the front wall 3 and / or the rear wall 4 and / or the two side walls 5, 6 preferably has a wall thickness of 0.9 mm.

Since the hollow profile 1 should be self-supporting, that is to say should have a certain strength, a reduction of the wall thickness 11 below 0.5 mm is not provided. However, should the strength of the hollow section 1 to this extent not be required, for example, when the hollow section 1, a kind of cage, for example in the form of a grid, constructed, which takes on a strength by the carrying function and on the other hand, the hollow section 1 against the outside Shock and thus deformation of the same protects, of course, in the context of the invention, the wall thickness 11 be less than 0.5 mm.

Also with regard to the clear width of the channel 9, ie the maximum distance of the front wall 3 of the rear wall 4 of the hollow section 1, a further improvement of the heating capacity, ie the heat transfer, to achieve by further reducing this distance 10, in particular takes a value from a range with a lower limit of 2 mm and a upper limit of 4 mm. Preferably, this distance 10 between the front wall 3 and the rear wall 4 3 mm.

In principle, it is possible to produce the hollow profile 1 with a greater distance between the front wall 3 and the rear wall 4 than 5 mm. In this case, or to further reduce the distance 10, it is possible, the hollow profile 1 after the extrusion of a deformation, in particular a cold deformation, e.g. by pressing or rolling, to submit.

Since, of course, the flow resistance for the heat carrier increases as the distance between the front wall 3 and the rear wall 4 decreases, it is preferable that the minimum distance is 1 mm. Below lying distances, ie clear widths of the hollow section 1, however, can be used when the pump power for the circulation of the heat carrier is correspondingly high.

The metal from which the hollow profile 1 is produced is preferably made of an aluminum material, ie aluminum or an aluminum alloy. These materials are particularly suitable for producing hollow sections 1 by extrusion or cold forming. In addition, aluminum has the advantage of being more cost effective and substantially more corrosion resistant to iron than copper, which is commonly used in radiator construction.

hi Fig. 2 shows a variant of the hollow profile 1 is shown. In this embodiment variant, the channel 9 of the hollow profile 1 according to FIG. 1 is divided into a plurality of individual channels 9, so that therefore at least two channels 9 are present in the hollow profile 1. This is achieved by extending between the side walls 5, 6 in the direction of these side walls 5, 6 and connecting the front wall 3 with the rear wall 4, at least one web 12 is arranged. Preferably, this web 12 is also produced simultaneously with the hollow section 1 by extrusion. Since the at least one web 12 has only a limited support function, it is possible to perform this with a smaller wall thickness 13, which may be selected from a Range with a lower limit of 0.35 mm and an upper limit of 1 mm. Preferably, this wall thickness 13 is selected from a range with a lower limit of 0.4 mm and an upper limit of 0.8 mm or this wall thickness can be 0.5 mm.

The arrangement of this at least one web 12, it is possible to divide the heat carrier to a plurality of channels 9, so that the flow cross-section is further reduced and thus heat transfer via these webs 12, which are connected to the front wall 3 and rear wall 4 and thus to initiate this heat in these channels 9, to allow. However, it is thus also possible, within only one hollow profile 1, to conduct the heat transfer medium, that is to say the heating water, serpentine or meandering, so that, for example, a first channel 9 for the upward flow of the heat transfer medium and a further channel 9 for the downward flow the heat transfer medium is used. This extends the flow path of the heat transfer medium in the hollow profile 1 and is therefore also a longer period of time for the heat exchange available. The webs 12 thus increase the heat transfer surfaces and thus improve the efficiency. For this it is thus possible to give the hollow section 1 a higher pressure resistance and the radiator 2 with a higher operating pressure, which can reach up to several bar operate.

From Fig. 2 it is also apparent that the two side walls 5, 6 need not be flat, but for example, may also have a curvature. Likewise, of course, the front wall 3 and / or the rear wall 4 have such a curvature, so that, for example, the maximum distance of 5 mm between the front wall 3 and the rear wall 4 is achieved only in the central region of the hollow section 1 and in the two side areas of the two side walls 5, 6, the channels 9 lower light

Have width. In order to form the channels 9 with a constant flow cross-section, it is possible to vary the webs 12 in their mutual distance. On the other hand, an increase in the flow cross-section in the center region of the hollow profile 1 can be deliberately formed in order to vary, for example, the flow resistance within the hollow profile 1 or to design the flow profile such that the flow resistance over the hollow profile 1 is at least approximately constant within narrow limits.

The variation of the size of the flow cross-section within a hollow section 1 or the Radiator 2 is generally for all embodiments of the invention, a way to influence the flow resistance.

On the other hand, instead of a convex bulge of the hollow profile 1 at least in the central region, it is also possible to make the front wall 3 and / or the rear wall 4 and / or the two side walls 5, 6 concave, so that a flow cross section in the center region of the hollow profile 1 is smaller , as in the flow cross-section in the two edge regions.

Also in this case, of course, the adaptation of the flow cross sections by varying the distances of the webs 12 to each other is possible.

The hollow profile 1 provided for a radiator 2, in particular a flat radiator, preferably has a width 14 selected from a range with a lower limit of 40 mm and an upper limit of 400 mm. This makes it possible to provide a plurality of channels 9 in the hollow section 1 - if equal to this width 14 of the hollow section 1 is also appropriate if only one channel 9 is provided in this - so as to pretend a corresponding flow of the heat transfer medium in the hollow section 1. However, this width 14 may be further selected from a range having a lower limit of 80 mm and an upper limit of 250 mm and 100 mm, respectively. Larger widths 14 are preferably used only when the hollow profile 1 is arranged at least approximately parallel to a longitudinal extension of the radiator 2 running in this, smaller widths, however, are particularly preferably used when the hollow sections 1 are aligned perpendicular to a longitudinal extent of the radiator 2 , like this eg is shown in Fig. 8. It is thus possible, while still low depth of the radiator 1, to increase the heat transfer area accordingly.

In principle, only one channel 9 can be formed in the hollow profile 1. Preferably, the number of channels, which are arranged in the hollow profile 1, in particular immediately adjacent to each other, so only separated by the webs 12, selected from a range having a lower limit of 15 and an upper limit 40, in particular with a lower limit of 20 and an upper limit of 30, preferably 24 channels 9 are arranged in the hollow profile 1. It is thus possible, the heat transfer surface according to the Heizbe- may vary or is thus to achieve a variation of the structural dimensions of the radiator 2.

The adjacent channels 9 cover virtually the entire radiator surface or Hohlprofϊlfläche. This is a very high efficiency of the radiator 2 can be achieved.

Optionally, it is possible by switching on or off of individual channels 9 and / or individual hollow sections 1, for example in the radiator 2 for this purpose flaps for closing these individual channels 9 and / or hollow sections 1 are provided, the heating power in addition to a thermostat controller conventionally used accordingly to vary.

In the embodiment of Hohlprofϊls 1 as a multi-channel profile, it is advantageous if a width 15 of the channels 9, so the lateral distance between the webs 12 is selected, from a range with a lower limit of 1.5 mm and an upper limit of , 5 mm. By this cross-sectional limitation, an improved efficiency can be achieved, namely in which the ratio of the cross-sectional area of the channel 9 in relation to the heat transfer surface on the front wall 3, the rear wall 4 and the two side walls 5, 6 and the webs 12 is correspondingly low adjustable ,

To further improve the efficiency, it is advantageous to select the width 15 of the channels 9 from a range with a lower limit of 2 mm and an upper limit of 3 mm and the width 15 of the channels 9 on the order of 2.2 mm choose.

It is furthermore advantageous, since in particular ultimately the heat radiating surfaces, either the front wall 3 or the rear wall 4 or the side walls 5, 6, ie those walls which communicate with the ambient air, are when the width 15 of the channels 9 is smaller is, as the distance 10 of the front wall 3 of the rear wall 4, since ultimately the transmitted heat in the webs 12 must also be forwarded in these outer walls.

In principle, the cross-section of the channels 12 can be chosen arbitrarily, that is, for example, rectangular, square, round, trapezoidal, rhomboid, diamond-shaped or triangular and is to this end in Fig. 3, to illustrate this, hinted another embodiment of the hollow section 1 in plan view. This hollow profile 1 consists essentially of a Sequence of erected squares, in particular squares, wherein the connection of the individual squares takes place via the corners, so that therefore the cross section of the channels 9 is also quadrangular or square. In this embodiment variant of the hollow profile 1, the front wall 3 and the rear wall 4 are not formed by planar walls, but instead have a zig-zag-shaped profile when viewed in cross-section. As a result, the distance 10 of the front wall 3 of the rear wall 4 of that distance 10, which is formed between two opposite corners. This distance is reduced after the channels 9 are connected to each other via the corners to zero and then increase again to the maximum value. In this sense, the definition of this distance 10 is to be understood in the context of the invention.

Dashed line is indicated in Fig. 3 that also in this variant of the hollow profile 1, the channels just described 9 outside of a front wall 3, a rear wall 4 and the side walls 5, 6 may be limited, in the context of the embodiment of FIG. 1. Vorzugs - Here are the previously described the distance 10 as defining described opposing vertices connected to these walls. For example, this structure can also be produced by extrusion. It is also conceivable that these corners are connected via, for example, welds with the individual walls. It is thus possible, in addition to these square or diamond-shaped channels 9 in the edge regions of the hollow profile 1, to form further channels 9 with a triangular cross section, so that this hollow profile 1 has a large number of individual channels. It should thus be made clear that it is entirely possible within the scope of the invention to combine different cross-sectional shapes for the channels 9 with each other within a hollow profile 1. This combination is of course also possible if several hollow sections 1 are used for a radiator 2, wherein in a hollow profile 1, only a cross-sectional shape of the channels 9 is present.

With this design of the combined channels of FIG. 3 can be achieved that, for example, in the inner quadrangular channels 9, the still relatively hot heat transfer medium flows in one direction and in the outer channels 9 with triangular

Cross-sections already cooled heat transfer medium the still hot heat transfer medium flows counter, so that in turn a snake-shaped or meandering flow within a hollow section 1 is achieved. Thus the heat transfer takes place gear from the hot heat transfer medium on the one hand in the walls of the hollow section 1 and on the other hand in the already cooled heat transfer medium in the triangular channels 9, so that heat can still be delivered to the environment via this detour. This cross-sectional shape has a particularly high stability and is therefore also suitable for higher operating pressures of a heating system.

4, the arrangement of four hollow sections 1 for forming a radiator 2. These hollow sections 1, seen in plan view, arranged in the form of a rectangle, with two opposing hollow sections 1, which form the longitudinal sides of the radiator 2, with several Channels 9 are provided and in turn each two opposite hollow sections 1, which form the transverse sides of the radiator 2, each equipped with a channel 9. The individual channels 9 are in fluid communication with each other, wherein the individual hollow sections 1 can be connected to each other, for example via pipes 16. Of course, it is possible that the two broad sides forming hollow sections 1 have more than one channel 9 or conversely, it is also possible that the longitudinal sides forming hollow sections 1, i. at least one of which has only one channel 9.

On at least one of the hollow sections 1, in turn, the inlet 7 and the outlet 8 is arranged for the heat transfer medium. Preferably, these are located on the rear wall of the radiator 2, so as to allow an externally at least approximately invisible supply line of the heat transfer medium.

With this arrangement of hollow profiles 1, it is of course also possible to allow the heat transfer medium to flow through the individual channels 9 in serpentine or meandering fashion. Corresponding shut-offs, etc. between individual channels 9, so that an overflow is made possible only between two adjacent channels 9, can be arranged here.

This arrangement of several hollow profiles 1 according to FIG. 4 represents only one of the possible embodiments and can also be arranged more than four or less than four hollow sections 1 in the radiator 2. In extreme cases, the radiator 2 may comprise only a hollow profile 1. 5 is merely intended to illustrate that, of course, in the case of the hollow profile 1 according to the invention, ie a radiator 2 formed therefrom, according to the state of the art, so-called lamellae 17 for enlarging the heat-emitting surface on one of the walls of the hollow profile 1 , so for example, the rear wall 4 to arrange. It is also a centric arrangement of the hollow section 1 in the radiator 2 is possible, so that therefore the hollow section 1 viewed in cross-section is surrounded on all sides by such fins 17. In this case, it is advantageous if the radiator 2 has at least one outer lining element in order to avoid direct inspection of the inner structure, in particular the lamellae 17, provided that they have a visually disturbing effect.

As shown in FIG. 6, it is possible to provide at one of the two end regions of the hollow profile 1 a collecting line 18, for example with a rectangular cross-section. This bus 18, i. the cross-sectional widening in this area can be produced in such a way that one of the two opposing walls, that is to say, for example, the rear wall 4, is produced with a greater length than the front wall 3. As a result, over the front wall 3 protruding part of the rear wall 4 can be bent several times, so that not only the channel 9 and the channels 9 thereof are covered, but laterally even this bus 18 is formed. The end portions of the two walls, i. the front wall 3 and the rear wall 4, can be welded together to produce the necessary tightness, as indicated in Fig. 6. In this way, therefore, manifolds 18, which connect individual channels with each other, are generated, in which, for example, the heat transfer medium is supplied or which are also used in a serpentine or meandering course of the heat transfer medium within a hollow section 1, the corresponding Überertrittsmöglichkeiten of to create a channel 9 in another channel 9. The feed 7 or the outlet 8 of the heat transfer medium (not shown in FIG. 6) can also be provided on these collecting lines 18. The manifolds 18 may be formed extending transversely to the channels 9.

Of course, other cross sections for the manifold 18 are also possible here, for example, in which they are no longer bent and unbent, but for example, are produced by a simple rounding, as indicated by dashed lines in Fig. 6. FIGS. 7 to 10 show a wide variety of possible connections of a plurality of hollow profiles 1 in a supply line 19 and discharge line 20 for the heat transfer medium.

Thus, for example, according to FIG. 7, it is possible to provide corresponding slot-shaped recesses in the feed line 19 and the discharge line 20 into which or to which the hollow sections 1 are connected, for example welded to them, in order to establish the flow connection. The hollow sections 1 are aligned at least approximately parallel to the feed line 19 and the discharge line 20.

On the other hand, it is possible, as FIG. 8 shows, to equip the open ends of the hollow profile 1 with additional connecting devices 21, which may be hood-shaped, for example. These connecting devices 21 can in turn be welded to the hollow profiles 1 on the one hand and to the collecting line 18 or the supply line 19 on the other hand. In this case, the execution of a radiator 2 of Fig. 8, the hollow sections 1 - although only three hollow sections 1 are shown, it is of course possible to arrange more or less of these hollow sections 1 in the radiator 2 - in contrast to the embodiment of FIG. 7 not aligned at least approximately parallel to the feed line 19 and the drain line 20, but at least approximately perpendicular thereto. A distance 22 between the individual hollow profiles 1 can be chosen so that between the hollow profiles 1 a kind of forced convection is formed, so which these hollow sections 1 are flowed around by the surrounding room air and thus a better heat transfer through the inflowing from below cooler air and thus An increase in the efficiency is possible.

Optionally, it is possible, these hollow sections 1 rotatable in the supply line 19 and

To arrange drain line 20 so that these hollow sections 1 can be rotated in the manner of a slat curtain from an approximately parallel orientation in an approximately vertical orientation and thus the convection between the hollow sections 1 can be varied accordingly.

9 shows a variant in which, in contrast to the preceding FIGS. 7 and 8, the feed line 19 and the discharge line 20 are arranged on the same side of the hollow sections 1, for example at the top. The hollow profiles 1 can be used for additional sam- Mels 18 to the flow connection in the supply line 19 and the drain line 20 to be integrated. For this purpose, this manifold 18 can be arranged at the open end of each hollow section 1, wherein preferably the integration into the drain line 20 via a pipe bend, not shown, which predetermines the flow direction of the heat transfer medium.

Such a pipe bend can also be provided in the region of the feed line 19.

The other open ends of the hollow profile 1 must of course be closed in this embodiment. This is done for example by welding with a cover element. However, in order to enable the return of the heat transfer medium in the discharge line 20 of this embodiment, a manifold 18 should also be provided in the lower area. Also in this case, a meandering flow pattern of the heat transfer medium within a hollow profile 1 is achieved.

Fig. 10 shows a variant in which the integration of the hollow sections 1 in the supply line 19 and the drain line 20 of the radiator 2 via simple pipe connections according to the prior art is performed.

Also in this variant, both the supply lines 19 and the drain line 20 on the same side of the radiator. 2

Finally, FIG. 11 shows an alternative embodiment of the radiator 2, again with several hollow profiles 1. These are flowed through in a serpentine manner according to arrow 23, wherein within the hollow profile 1 the heat transfer medium in the channels 9 (not shown) has the same flow direction. In this embodiment variant, both the inlet 7 and the outlet 8 are provided in the lower region of the radiator 2, so that in other words, the radiator 2 stands on the inlet 7 or outlet 8.

To increase the heat-transmitting surface or to produce a turbulent flow, if this does not arise anyway, it is possible at least on the inner surfaces of the walls or the webs 12 of the hollow profile 1 ribs or the like. Provide, as in DE 297 18 876 Ul are described, the content of this disclosure to the Content of this description counts.

Fig. 12 shows a variant of the hollow profile 1 in front view. In this case, the rear wall 4 is made flat, whereas the front wall 3 is formed corrugated in the manner of a sawtooth. The corrugation extends into the channels 9, so that they have a substantially pentagonal cross-section.

As shown in FIG. 13, however, the corrugation can be formed exclusively on the outer surface of the front wall 3, so that the channels 9 again have a substantially quadrangular cross section.

Finally, FIG. 14 also shows an alternative embodiment of the hollow profile 1, in which both the front wall 3 and the rear wall 4 have this corrugation, in which case the corrugation does not extend into the channels 9, ie they have a substantially quadrangular cross section , However, it is also possible in this variant to form the corrugation according to FIG. 12, wherein the front wall 3 and / or the rear wall 4 can be provided with it. The front wall 3 and the rear wall 4 may also have a different corrugation or, in general, a different surface structuring.

The corrugation in these variants can also be designed so that not in the region of each web 12 a wave crest is arranged, but that the wave troughs extend over at least two adjacent channels.

On the other hand, it is possible that the corrugation is not provided with curves, but that the wave crests are connected with straight lines, or are hybrids of curves and straight lines possible. The radius of the rounding can also be adapted to the respective requirements, or a rounding can have several different radii.

The width 14 of the hollow profile 1 according to FIG. 12 is, for example, 120 mm. The width 15 is 4.3 mm. The wave crests can, for example, rise by 1.4 mm over the wave troughs, whereby a variation of wave height in the range between 0.75 mm and 3 mm is possible here. The exemplary embodiments show possible embodiments of the radiator 2 according to the invention or of the hollow profile 1 according to the invention, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching on technical action by objective invention lies in the ability of those skilled in this technical field. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.

For the sake of the order, it should finally be pointed out that for a better understanding of the construction of the radiator 2, this or its components have been shown partly unevenly and / or enlarged and / or reduced in size.

The problem underlying the independent inventive solutions can be taken from the description.

Above all, the individual in Figs. 1; 2; 3; 4; 5; 6; 7; 8th; 9; 10; 11; 12; 13; 14 embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

REFERENCE NUMBERS

1 hollow profile

2 radiators

3 front wall

4 rear wall

5 sidewall

6 side wall

7 inlet

8 expiration

9 channel

10 distance

11 wall thickness

12 footbridge

13 wall thickness

14 width

15 width

16 pipeline

17 lamella

18 manifold

19 supply line

20 drain line

21 connection device

22 distance

23 arrow

Claims

Patent claims

1. Radiator (2) with at least one, of a heat transfer medium through-flowed hollow profile (1) consisting of a front wall (3) and a thereto at least partially at a distance (10) arranged rear wall (4), which by two side walls (5 , 6) with formation of at least one channel (9) are interconnected, and each with at least one inlet (7) and a drain (8) for the heat transfer medium and possibly on the hollow profile (1) arranged slats (12) to improve the heat dissipation , characterized in that the maximum distance (10) between the front wall (3) and the rear wall (4) is selected from a range with a lower limit of 1 mm and an upper limit of 5 mm.

2. Radiator (2) according to claim 1, characterized in that the distance (10) between the front wall (3) and the rear wall (4) is selected from a range with a lower limit of 2 mm and an upper limit of 4 mm ,

3. radiator (2) according to claim 1, characterized in that the distance (10) between the front wall (3) and the rear wall (4) is 3 mm.

4. radiator (2) according to any one of the preceding claims, characterized in that between the side walls (5, 6) the front wall (3) with the rear wall (4) connecting at least one web (12) to form at least one further channel (9 ) is arranged.

5. radiator (2) according to claim 4, characterized in that the at least one web (12) has a wall thickness (13) selected from a range with a lower limit of 0.35 mm and an upper limit of 1.0 mm ,

6. radiator (2) according to claim 4, characterized in that the at least one web (12) has a wall thickness (13), selected from a range with a lower limit of 0.4 mm and an upper limit of 0.8 mm ,

7. radiator (2) according to claim 4, characterized in that the wall thickness (13) of the at least one web (12) is 0.5 mm.

8. radiator (2) according to one of claims 4 to 7, characterized in that the channels (9) in the hollow profile (1) are arranged directly adjacent to each other.

9. radiator (2) according to any one of the preceding claims, characterized in that the number of channels (9) in the hollow profile (1) is selected from a range having a lower limit of 15 and an upper limit of 40.

10. radiator (2) according to one of claims 1 to 8, characterized in that the number of channels (9) in the hollow profile (1) is selected from a range having a lower limit of 20 and an upper limit of 30.

11. radiator (2) according to one of claims 1 to 8, characterized in that number of channels (9) in the hollow profile (1) 24 is.

12. radiator (2) according to any one of the preceding claims, characterized in that a width (15) of the channels (9) is selected from a range with a lower limit of 1.5 mm and an upper limit of 5 mm.

Radiator (2) according to one of claims 1 to 11, characterized in that the width (15) of the channels (9) is selected from a range with a lower limit of 2 mm and an upper limit of 3 mm.

14. radiator (2) according to one of claims 1 to 11, characterized in that the width (15) of the channels (9) is 2.2 mm.

15. radiator (2) according to any one of the preceding claims, characterized in that a width (15) of the channels (9) in the direction of the front wall (3) is smaller than the distance (10) of the front wall (3) from the rear wall ( 4).

16. radiator (2) according to any one of the preceding claims, characterized in that the hollow profile (1) has a width (15), selected from a range with a lower limit of 40 mm and an upper limit of 400 mm.

17. Radiator (2) according to one of claims 1 to 15, characterized in that the hollow profile (1) has a width (15), selected from a range with a lower limit of 80 mm and an upper limit of 250 mm.

18. radiator (2) according to one of claims 1 to 15, characterized in that the hollow profile (1) has a width (15) of 100 mm.

19. Radiator (2) according to one of the preceding claims, characterized in that the front wall (3) and / or the rear wall (4) and / or the side walls (5, 6) have a wall thickness (11) selected from a range with a lower limit of 0.5 mm and an upper limit of 1.5 mm.

20. radiator (2) according to one of claims 1 to 18, characterized in that the front wall (3) and / or the rear wall (4) and / or the side walls (5, 6) have a wall thickness (11), selected from a range with a lower limit of 0.75 mm and an upper limit of 1, 2 mm.

21. Radiator (2) according to one of claims 1 to 18, characterized in that the front wall (3) and / or the rear wall (4) and / or the side walls (5, 6) has a wall thickness (11) of 0.9 mm have.

22. Radiator (2) according to one of the preceding claims, characterized in that a plurality of hollow profiles (1) to form a channel system via manifolds (18) are fluidly connected to each other.

23. Radiator (2) according to claim 22, characterized in that the flow connection via opposing open profile ends of the hollow profiles (1) is made.

24. Radiator (2) according to claim 22 or 23, characterized in that the hollow profiles - Ie (1) are flow-connected to one another in such a way that the heat transfer medium flows meandering fδrmig through the channel system.

25. Radiator (2) according to one of the preceding claims, characterized the front wall (3) and the rear wall (4) are arranged at least approximately parallel to one another.

26. Radiator (2) according to one of the preceding claims, characterized in that the channels (9) have a rectangular, square, round, trapezoidal, rhomboid or triangular cross-section.

27. Radiator (2) according to one of the preceding claims, characterized in that the hollow profile (1) is extruded.

28. radiator (2) according to claim 27, characterized in that the Hohlprofϊl (1) after extrusion to reduce the distance (10) between the front wall (3) and the rear wall (4) has been subjected to a deformation.

29. Radiator (2) according to any one of claims 22 to 28, characterized in that a respective manifolds (18) is connected via at least one bend with the inlet or the drain.

30. radiator (2) according to any one of the preceding claims, characterized in that the hollow profile (1) made of aluminum or an aluminum alloy is formed.

31. Radiator (2) according to one of the preceding claims, characterized in that at least individual hollow sections (1) are arranged at least approximately perpendicular to a front side of the radiator (2).