EP1087196A2 - Radiator - Google Patents

Abstract

The radiator (1) comprises vertically arranged tubes (2) having concentric double walls between which electrically, or centrally heated water or oil is circulated and ambient air is drawn through the center by convection and heated.

Description

The invention relates to a radiator with a radiator tube and one that can be circulated in the radiator tube. Heating medium, such as water or oil.

Such radiators are known, for example, floor-resistant or hanging radiators in a home heating network, which is heated by the radiator tube Water circulates and the outside of the radiator pipe passing air is heated. Furthermore, electric heaters are known, in which the circulating heating medium is preferably oil. This is done by means of an electrical cartridge in the form of a Resistance heating heats and flows through the radiator pipes due to gravity circulation. Such Electric radiators are available as both standing and known as a mobile radiator.

In view of the prior art described above becomes a technical problem of the invention seen in it a radiator the one in question Kind of improved design.

This problem is first and foremost with Subject matter of claim 1 solved, based on it is that the radiator tube is double-walled is, with the heating medium between the walls flows and the inner wall is open at each end Limited airspace. As a result of this configuration a radiator with a particularly high heat output specified. Due to the double wall of the radiator pipe the air is not heated only, as is known in the prior art, in Area of the pipe outer wall, but also beyond in a central area of the pipe along the pipe inner wall. In addition, it is due to the double wall formed air interior of the radiator tube through includes the inner wall of the double tube, making a targeted Warming of the flowing through the interior Air is reached. In a preferred arrangement provided that the double-walled radiator tube perpendicular is aligned, whereby when the Radiator in the air-flowed interior of the radiator pipe sets a chimney effect. This leads to an increased warm air distribution in the to be heated Room. However, there are also others, for example inclined ones Alignments of the radiator tube conceivable. About that there is also the possibility of an inventive Align the shaped radiator tube horizontally and on one side at the end of the open air space to provide a blower. In a preferred embodiment the subject of the invention is provided that the double wall through two concentric tubes is reached. As a result of this configuration is between an annular space for passage through the two concentric tubes of the heating medium. For example, that the tubes are steel tubes, further e.g. an outer tube about 2 inches in diameter and an inner tube 1.5 inches in diameter having. With training in the form of steel tubes can be welded to each other at the end be so that there is a central end on both sides open airspace and between the tubes Heating medium annulus closed at both ends results. Especially with a preferred vertical Arrangement of the radiator tube can be in one embodiment of tubes as steel tubes in particular upper air outlet area of the central airspace by means of a loosely placed sieve or the like be covered, which for cleaning the radiator tube is designed to be removable. In a preferred one The tubes are designed as aluminum tubes. In this regard, it is further proposed that the tubes integral in the form of a drawn or extruded Profile are trained. As a result of this Design is the double-walled according to the invention Radiator pipe in manufacturing technology advantageous Way to make. This also makes individual Radiator pipe lengths can be produced, for example radiator pipes with a length or a radiator height of for example 4 m. Around the heating medium annulus on both sides To close at the end is particularly one Formation of the tubes in the form of an integral profile provided that the double walls of the radiator tube each end sealingly connected to each other are. In this regard, it can be provided that the connection is given by a cap. Therefore is on both ends of the radiator tube a closure cap is arranged for sealing of the heating medium annulus. In an advantageous further training the subject of the invention is provided that the closure cap is circular in shape, with possibly bridging the further inner circle, Struts leaving air passage openings, to form a in the area of the air passage opening sieve-like cap. It is also proposed that the cap with the double walls connected with the interposition of an elastomer seal is. This can be, for example, an EPDM rubber seal act, which is preferably the face of the double-walled radiator tube, the two tubes bridging between the double walls and the circular, closed portion of the cap is arranged, this is further preferred circular plan shape. The attached cap can then - even without one of the above Seals - directly with the radiator pipe be soldered, especially in the case of a configuration of the tubes as aluminum tubes. Regarding the Soldering can also be done in such a way that with the Ends of the concentric tubes, the annulus covering between the tubes, an aluminum ring soldered becomes; and then soldered the cap, welded or otherwise attached to the tubes. In addition, there is also the possibility of the cap to be welded to the pipe. The aforementioned Elastomer seals are used in particular if, as further suggested, the cap with the double walls is screwed. In this regard preferred that the screw connection by self-tapping Screws is executed. The latter are more advantageous Way sunk in the cap. It proves to be particularly advantageous that the double-walled radiator pipe with a heating medium distributor pipe is connected, one for the heating medium Flow path from the manifold into the double wall Tube and vice versa. As a result the medium annulus of the double-walled radiator pipe supplied by a heating medium manifold, whereby in this regard, it is further proposed that the manifold itself with its longitudinal axis transverse to the longitudinal axis of the double-walled radiator pipe extends. So is with a preferred vertical alignment of the radiator tube the manifold is aligned horizontally. To form the flow path between the distributor pipe and radiator pipe are assigned accordingly Openings in the pipes, for example in the form of Holes, provided. Radiator tubes are preferred and manifold connected to each other in this area, more preferably welded or soldered. For Formation of a multi-rib radiator is provided that the manifold with a plurality of double-walled Radiator pipes with a view to each Inflow or outflow of heating medium is connected. You can use several double-walled radiator pipes one-sided or also opposite on both sides be connected to the distributor pipe, this with even The radiator pipes are spaced apart. So can radiators according to the invention with five, eight, ten or fifteen radiator tubes in one or two layers be educated. In addition, the invention Design radiator with, for example, 30-50 Radiator pipes can be produced in a side-by-side arrangement, this with a construction height, d. H. Radiator tube length of for example 4 m. Regardless of the number of radiator pipes and the plies are all radiator pipes served by the same manifold. In a further embodiment The subject matter of the invention is further in this regard provided that a double-walled radiator tube is connected to two distribution pipes, so one preferred vertical alignment of the radiator pipes with an upper manifold and a lower manifold, so that a heat cycle is formed. Prefers becomes an arrangement in which the connection between a manifold and a double wall Radiator pipe one end of the double-walled Radiator pipe is assigned. The one described above Radiator according to the invention is different usable, for example in such a way that the radiator as Mobile electric radiator is formed, wherein Oil is preferably used here as the heating medium. This Heating medium is further preferred in a manifold by means of an electrical resistance heater in Art of an inserted electric heating element. Here can use heating rods with 300, 500, 1,000, 1,500, 2,000 or 2,500 watts with a voltage of 230 volts Find. Every heating element is equipped with a thermostat, so that the temperature is individual depending on the room can be adjusted. The arrangement is preferably carried out resistance heating with vertical arrangement the radiator pipes in a lower manifold. Furthermore, the radiator is in shape when trained a mobile electric radiator with two rollers and a support on the sliding side and with one, preferred the handle assigned to the upper distributor pipe. Due to the double-walled design according to the invention the radiator tube is preferred in one vertical orientation of the same at the bottom air sucked in by thermal buoyancy and on the top given warmed up. To increase the heating output each individual radiator tube is according to the invention provided that the open airspace from one in Longitudinal direction of the double-walled radiator pipe extending air guide element is penetrated. Prefers is that the air guide element as a spiral body is trained. The latter can be in the form of a central airspace of the radiator tube to be inserted Be formed sheet metal strip, which, for example extends almost over the entire length of the pipe. Prefers the air guide element has a length which is approximately Corresponds to 95% of the radiator pipe length. For education of the spiral body is the air guiding element in the form of a Sheet metal strip three to six times, preferably four to twisted five times, this with one, the airspace diameter corresponding air baffle width. As a result, the air guide element corresponds to one Vortex that accelerates the air buoyancy and thus increases the heating power of the radiator pipe. Finally, alternatively to the formation of the radiator be provided as a mobile electric radiator, that this for integration into a home heating network is formed, with corresponding on a manifold Connections are formed. With such a Application is a single-row design of the radiator prefers. One end of each manifold appropriate connections are formed, so preferably in the form of 3/4 inch female thread fittings. Furthermore, as with conventional wall radiators known in house treatment networks, a distribution pipe, especially the upper manifold, a thermostat be assigned. As a result of those previously described Design according to the invention result in a Construction height of 600 mm heating outputs of, for example, 100 watts each Radiator tube, so that with an arrangement of two times five radiator tubes with a heat output of 1 KW is achieved. The distribution pipes can be the same Radiator pipes made of both steel and aluminum be made.

Of particular importance is an electrical operation, also self-sufficient electrical operation, for the vertical pipes of selected diameter ratios, this is then combined with the flow through of the inner tube, which in turn are essential also regarding the flow conditions the cap or caps depends.

In this connection it is preferred that the outside diameter of the inner tube about 50 to 75% of the inner diameter of the outer tube. At central Arrangement of the pipes, i.e. with matching central axes, so there is an annulus that on the one hand is advantageous with regard to the desired natural circulation, on the other hand, however, more common when choosing Wall thicknesses, sufficient flow space for leaves the air to be heated through the inner tube. In this respect, the inner diameter of the inner tube can preferably about 1.5 to 2.5 times the difference of Inner diameter of the outer tube to the outer diameter of the inner tube.

With regard to the caps 14 it is provided that the percentage of holes 20 to 70% of the free circular area of the Inner tube is based on this circular area. It is particularly preferred that the proportion of holes be about 30 up to 55% of this area.

Fig. 1

einen erfindungsgemäßen Heizkörper in Ansicht, eine erste Ausführungsform in Art eines fahrbaren Elektro-Heizkörpers betreffend;

Fig. 2

die Draufsicht hierzu;

Fig. 3

eine Stirnansicht hierzu;

Fig. 4

den vergrößerten Schnitt gemäß der Linie IV-IV in Fig. 2, bei Ausbildung von Heizkörper-Rohren aus Stahl;

Fig. 5

vergrößert einen Bereich des Heizkörpers in Draufsicht, eine weitere Ausführungsform betreffend;

Fig. 6

einen Querschnitt durch zwei gegenüberliegend angeordnete Heizkörper-Rohr aus Aluminium und einem diese versorgenden Verteilerrohr, gemäß der Ausführungsform in Fig. 5;

Fig. 7

den Schnitt gemäß der Linie VII-VII in Fig. 6;

Fig. 8

eine der Fig. 6 entsprechende Darstellung, jedoch eine weitere Ausführungsform betreffend, bei Anordnung eines Luftleitelementes in jedem Heizkörper-Rohr;

Fig. 9

den erfindungsgemäßen Heizkörper in einer weiteren Ausführungsform als Elektro-Wandheizkörper;

Fig. 10

die Draufsicht zu Fig. 9;

Fig. 11

eine der Fig. 9 entsprechende Ansicht, den Heizkörper in einer weiteren Ausführungsform darstellend, bei Ausbildung zur Integration in ein Hausheizungsnetz;

Fig. 12

die Draufsicht hierzu; und

Fig. 13

eine Darstellung gemäß Fig. 6, jedoch mit demgegenüber unterschiedlichen Durchmesserverhältnissen der Rohre und nicht im Querschnittsbereich miteinander verbundenen Rohren.

The invention is explained in more detail below with reference to the accompanying drawing, which only shows several exemplary embodiments. It shows:

Fig. 1

a radiator according to the invention in view, relating to a first embodiment in the manner of a mobile electric radiator;

Fig. 2

the top view of this;

Fig. 3

a front view of this;

Fig. 4

the enlarged section along the line IV-IV in Figure 2, when forming radiator tubes made of steel.

Fig. 5

enlarges an area of the radiator in plan view, relating to a further embodiment;

Fig. 6

a cross section through two oppositely arranged radiator tube made of aluminum and a supply pipe supplying this, according to the embodiment in Fig. 5;

Fig. 7

the section along the line VII-VII in Fig. 6;

Fig. 8

a representation corresponding to FIG. 6, but relating to a further embodiment, when an air guiding element is arranged in each radiator tube;

Fig. 9

the radiator according to the invention in a further embodiment as an electric wall radiator;

Fig. 10

the top view of Fig. 9;

Fig. 11

a view corresponding to FIG. 9, showing the radiator in a further embodiment, in the case of training for integration into a house heating network;

Fig. 12

the top view of this; and

Fig. 13

a representation according to FIG. 6, but with different diameter ratios of the pipes and pipes not connected to one another in the cross-sectional area.

Is shown and described initially with reference to Fig. 1 shows a radiator 1, which in particular from a Plurality of radiator tubes 2 and two perpendicular to these arranged distribution pipes 3, 4.

As can be seen from the sectional view in FIG. 4, each radiator tube 2 is double-walled, this double wall by two concentric Tubes 5, 6 is reached. These two tubes 5, 6 form an annular space 7 between them, through which a heating medium 8, such as water or oil, flows. The Inner wall 9 of the inner tube 6 delimits one on both sides open air space 10 at the end for the passage of the warming air 11.

The tubes 5 and 6 are essentially in cross section circularly shaped, which is also a in cross section an essentially circular disk-shaped Airspace 10 results.

In the formation of the tubes 5, 6 in the form of steel tubes are these for the sealing closure of the heating medium annulus 7 retracted each other and with each other welded. This results in the end face the radiator tube 2 thus formed an axial Ring collar 12.

As can further be seen from FIG. 4, the air outlet area is 13 with a sieve-like cap 14 covered, which lies loosely, or, as shown, is clamped on the ring collar 12. This Cap 14 is for cleaning the tubular Airspace 10 removable.

As shown, that is in the embodiment air inlet area 15 located at the bottom is open. However, this can also be done with a corresponding sieve-like cap 14 may be provided.

As shown in particular in Fig. 2, the inventive Radiator 1 from two sides of the manifolds 3, 4 arranged, several radiator tubes 2 showing layers consist here of two times ten Radiator pipes 2. There are also more or fewer radiator tubes 2 in one or two layers Arrangement with appropriate length of the distribution pipes 3, 4 can be arranged. Also the height shown - here, for example. 60 cm - is variable. So can radiator pipe lengths of up to 4 m.

It is essential here that the in its longitudinal axis x transverse to the longitudinal axis y of the double-walled radiator pipes 2 extending manifolds 3, 4 flow connected are with the radiator pipes 2. Here are the distribution pipes 3, 4 each an end region assigned to the double-walled radiator pipes 2.

To form the flow path, each radiator tube has 2 a bore passing through the outer tube 5 16, which are positioned accordingly Bore 17 of the distributor pipe 3 or 4 corresponds. In the area of the flow path formed thereby between distributor pipe 3 or 4 and radiator pipe 2 these tubes are sealingly connected to one another, preferred welded.

When the radiator 1 is designed according to FIG. 1 to 3 in the manner of an electric radiator Heating of the in the distribution pipes 3, 4 and in the Radiator tubes 2 circulating heating medium 8 by means of an electrical resistance heater 18, which in the illustrated embodiment of an end side of lower manifold 4 is assigned. This one Resistance heater 18 opposite end of the lower manifold 4 and both ends of the upper manifold 3 are sealed. On the diagonally opposite the resistance heater 18 Side of the upper distributor pipe 3 is a handle 19 arranged to relocate the mobile radiator 1.

On both sides of the lower distributor pipe 4, assigned to that having the resistance heater 18 End area, wheels 20 arranged. On this one Wheels 20 opposite end portion of the lower A support 21 is provided on the underside of the distributor pipe 4.

The resistance heater 18 on the lower distributor pipe 4 causes the heating medium 8 to circulate under the force of gravity. The standing in the air space 10 of each radiator tube 2 Air column is by means of the surrounding by it Annulus 7 applied heat jacket in optimal Way heated, creating a chimney effect. The resulting air buoyancy creates a good one Distribution of the warmed air 11 in the room. Conditionally through this chimney effect, the air 11 is always in Air inlet area 15 sucked in.

The area is also warmed up the outer wall 22 of the outer tube 5 in the manner of a conventional one Radiator radiator (see dash-dotted arrows 11 ').

5 to 7 is the radiator according to the invention 1 shown in a further embodiment. opposite the previously described embodiment, at which both the radiator tubes 2 and the Distribution pipes 3, 4 are made of steel, are in this Embodiment formed from aluminum.

The double wall of the radiator tubes 2 is also reached here by two concentric tubes 5, 6, these being integrally extruded in the form of a Profile are trained. As a result, they are internal Tube 6 and the outer tube 5 through two opposite Radial webs 23 connected to each other.

In the connection area to these radial webs 23 is in Cross-section of essentially circular inner tube 6 flattened. The transition area from this flattened section of the inner tube 6 to the associated Radial webs 23 is thickened and with an in Axial direction of the tube, in cross section in provided substantially circular longitudinal recess 24.

The arrangement of the radiator tubes 2 thus formed the distributor pipes 3, 4 are carried out in the same way as in the previously described embodiment, wherein here the bore 16 of the radiator tube 2 for formation the flow path to the distributor pipe 3, 4 is provided in this way is that its axis is roughly in a radial web 23 formed level runs. As a result the radiator tube 2 arranged so that the annulus 7 dividing radial webs 23 in half a cross section of FIG. 6 transverse to the manifold 3, 4 run. The bore 16 can do so be made that the facing in this area Radial web 23 is omitted.

It is essential that the two through the radial webs 23 separate annulus sections in the area of formed flow paths (bores 16 and 17) connected are for uniform media supply via the Manifolds 3, 4.

As can be seen in particular from FIG. 7, the annular space is 7 of each radiator tube 2 on both ends through one on the respective end of the radiator tube 2 attached cap 14 closed, this with the interposition of an elastomer seal 25th

The closure cap 14 has in this embodiment an annular closure portion 26 to close the associated annulus opening of the radiator tube 2. The essentially the cross section of the air space 10 adapted circular interior 27 the cap 14 is interspersed with air passage openings 28 leaving struts 29. How 5 can be seen, which are radial to the tube axis y extending struts 29 arranged so that between these six air passage openings 28th are trained. Contrary to the illustrated embodiment can the cap 14 in the area of Circular interior can also be designed, for example, in a sieve shape.

The cap 14 thus formed can be in the simplest Way on the radiator tube 2, in particular on the outer tube 5, be welded or soldered. However, one as shown in FIG. 7 is preferred Attachment with self-tapping screws 30, which through appropriately arranged holes in the cap 14 kick in the area of the closure portion 26 and in the already mentioned recesses 24 of the thickened Hold the area of the inner tube 6. At such a screw connection is mentioned Elastomer seal 25 interposed, which one in has an essential circular plan.

To increase the heating output of every radiator tube 2 can according to the embodiment in Fig. 8 in Area of the air space 10 in the longitudinal direction of the same extending air guide element 31 in the form of a Helical body may be provided. This in the airspace 10 used and here preferably on the inner wall 9 the inner tube 6 attached air guide 31 extends about 95% of the total length of the radiator pipe and is four to five times that length Pipe longitudinal axis y twisted, with the cross section measured width of the air guide 31 always the Cross section of the free air space 10 adapted accordingly is.

As a result of this air guiding element 31 is the one of the Bottom air drawn in by thermal buoyancy due to the air guiding element forming a vortex 31 accelerates, with which the heating power of each radiator pipe 2 is increased.

9 to 12 show further exemplary embodiments of the radiator according to the invention 1. So 9 and 10, a single-layer, stationary wall radiator 1 shown. This is also as Electric radiator 1 formed with a thermostat having resistance heating 18. The arrangement this radiator 1 on a wall 32 takes place over usual wall brackets 33.

11 and 12 is such a wall radiator 1 shown for integration into a house heating network, each manifold 3, 4 on one end each have a corresponding connection 34, for example in the form of 3/4 inch female thread fittings. In The usual way is in the area of the inlet - here in the area of connection 34 of the upper distributor pipe 3 - a thermostat 35 is provided.

The representations only show exemplary embodiments. Different configurations are possible, so single and double row radiators, which are mobile or stationary and both as an electric radiator can also be used as a radiator in a home heating network are. In addition, there is also the number of radiator pipes 2 variable. For example, radiators 1 with two times five to two times fifteen pipes in the mold according to the invention can be produced. The height of the radiator 1, d. H. with normal vertical alignment of the Radiator pipes 2 whose length moves in usual Radiator dimensions, for example between 30 and 100 cm. About that however, higher radiators 1 and longer radiator tubes 2 conceivable. E.g. are heights producible from 3 to 4 m, this with a single layer Design with, for example, 40 radiator tubes 2.

13 shows a representation comparable to that of FIG Representation of Fig. 6. In contrast to this however in the embodiment of FIG. 13 two circular, not in the cross-sectional area shown interconnected pipes are provided. Here are the diameter ratios and especially the diameter of the outer tube 5 also chosen so that itself with an imaginary continuous wall of the outer tube 5 in the area of the bore 17, this wall is not in the Inside the manifold 3, 4 enters. The wall the inner tube 6 remains a multiple of the wall thickness even from the imaginary penetration line away.

This leads to an overall advantageous influence or inflow behavior, also combined with a advantageous large outer surface 22 of the outer tube 5. Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Tubes 5, 6 are steel tubes.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Tubes 5, 6 are aluminum tubes.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Tubes 5, 6 integral in the form of a drawn or extruded profile are formed.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Tubes 5, 6 are soldered to one another at the ends or are welded.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Cap 14 with the double walls with an intermediate layer an elastomer seal 25 is connected.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Cap 14 screwed to the double walls is.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Self-tapping screws 30 is executed.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Cap 14 soldered to the double walls or is welded.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Distribution pipe 3, 4 with its longitudinal axis x transversely to the longitudinal axis y of the double-walled radiator pipe 2 extends.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator where the manifold 3, 4 with a plurality of double-walled Radiator pipes 2 each with a view to an input or Outflow of heating medium 8 is connected.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator, in which a double-walled radiator pipe 2 with two manifolds 3, 4 is connected.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Connection between a distributor pipe 3, 4 and a double-walled radiator tube 2 one end of the double-walled radiator tube 2 is assigned.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Heating medium 8 in a distributor pipe 3, 4 by means of a electrical resistance heater 18 is heated.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Air guiding element 31 is designed as a spiral body.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Radiator 1 for integration into a home heating network is formed, with 3.4 corresponding to a distributor pipe Connections 34 are formed.

Subject of the invention, alone or in combination with one of the above-mentioned items of importance is also a radiator in which the Percentage of a cap 14 about 20 to 70% of covered free flow area of the inner tube is.

All the features disclosed are essential to the invention. The disclosure of the application is hereby also Disclosure content of the associated / attached priority documents (Copy of the pre-registration) in full included, also for the purpose, characteristics of this Documents in claims of the present registration with to record.

Claims (10)

Radiator (1) with a radiator tube (2) and a heating medium that can be circulated in the radiator tube (2) (8), such as water or oil, characterized in that that the radiator tube (2) is double-walled with the heating medium (8) between the walls flows and the inner wall (9) one end each open air space (10) limited. Radiator according to claim 1 or in particular according thereto, characterized in that the double wall by two concentric tubes (5, 6) is reached. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the double walls of the radiator tube (2) sealingly connected to one another at the ends are. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the connection through a cap (14) is given. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the closure cap (14) is annular is formed, possibly with the further interior of the circle (27) bridging, air passage openings (28) left struts (29). Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the double-walled radiator tube (2) with a heating medium distributor pipe (3, 4) is connected, wherein for the heating medium (8) a flow path from the Distribution pipe (3, 4) in the double-walled pipe (2) and is reversed. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the radiator (1) as a mobile electric radiator (1) is formed. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the open air space (10) of one in the longitudinal direction of the double-walled radiator pipe (2) extending air guide element (31) is penetrated. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the outside diameter of the inside of the concentric tubes (5, 6) about 50 to 75% of the inner diameter the outer of the concentric tubes (5, 6) is. Radiator according to one or more of the preceding Claims or in particular according thereto, characterized in that that the inside diameter of the inside of the Tubes (5, 6) 1.5 to 2.5 times the difference of Inside diameter of the outside of the tubes (5, 6) to the Outside diameter of the interior of the tubes (5, 6) is.

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