WO2007074082A1

WO2007074082A1 - Lantern for emitting a warning signal all the way round

Info

Publication number: WO2007074082A1
Application number: PCT/EP2006/069750
Authority: WO
Inventors: Klaus Kolb
Original assignee: Klaus Kolb
Priority date: 2005-12-23
Filing date: 2006-12-15
Publication date: 2007-07-05
Also published as: DE202005020110U1

Abstract

A lantern for emitting a warning signal all the way round a lantern axis (1) has a basic body (2), a belt optical means (5) and a cover (6). The basic body (2) has a bearing flange (3) and a central tube (4). The belt optical means (5) can be positioned onto the bearing flange (3), and the cover (6) can be positioned onto the belt optical means (5) and the central tube (4). The basic body (2), the belt optical means (5) and the cover (6) therefore form an accommodating area (8), which extends in annular fashion around the lantern axis (1) and in which a lighting circuit (9) is arranged. The lighting circuit (9) is thermally coupled to the bearing flange (3) and to the cover (6). When viewed in the axial direction, heat sinks (10), which have mutually spaced-apart cooling ribs (14) which protrude, when viewed in the axial direction, from the bearing flange (3) or from the cover (6), are arranged beneath the bearing flange (3) and on the cover (6). The cooling ribs (14), when viewed in the axial direction, are covered at their ends facing away from the bearing flange (3) or from the cover (6) by coverings (15, 16) extending radially inwards as far as the lantern axis (1). The bearing flange (3) and the cover (6) are annular and extend radially inwards beyond the central tube (4) as far as a connecting tube (20). The connecting tube (20) extends, when viewed in the axial direction, from the bearing flange (3) to the cover (6) and is sealed in a water-tight manner both towards the bearing flange (3) and towards the cover (6).

Description

Title: Lantern for broadcasting a warning signal

description

The present invention relates to a lantern for broadcasting a warning signal around a lantern axis, comprising a main body, a drum optical system and a lid.

Such lanterns are known for example from DE-U-203 05 625 and DE-U-20 2005 000 916 of the applicant. Both utility patents disclose that the main body has a support flange and a central tube. The belt optics can be placed on the support flange, the cover on the belt optics and the central tube. As a result, the main body, the drum optical system and the lid form an annular space extending annularly around the lantern axis, in which a lighting circuit is arranged. The lighting circuit is thermally coupled to the support flange and to the cover. In the case of the lantern known from DE-U-20 2005 000 916, heat sinks are furthermore arranged under the support flange and on the cover in the axial direction, which have spaced-apart cooling ribs which project from the support flange or from the cover in the axial direction.

The lantern of DE-U-203 05 625 mainly relates to the problem of creating a lantern which has a high mechanical reliability and robustness and, in particular, in continuous operation outstanding water resistance. The lantern of DE-U-20 2005 000 916 relates to embodiments of the optical arrangement of such a lantern, as a result of which high-performance light-emitting diodes can be used efficiently.

In lighting circuits occurs - as with other electrical consumers also - power loss. This power loss must be released to the environment. The output of the power loss is particularly critical when the lighting circuit has electronic components, since such devices are temperature sensitive. This therefore applies in particular when the lighting circuit has light-emitting diodes as lighting elements.

US-A-2002/0122309 discloses a lantern for broadcasting a warning signal about a lantern axis all around. This lantern has a base body, the - -

in turn, has an annular support flange. On the support flange a hood-like cover can be placed. The hood-like cover has a substantially cylindrical part and a lid covering the cylindrical part. The cylindrical part is transparent in its lower portion and has at its upper end ventilation slots. The cover serves to protect components arranged inside the cover. But it does not have the light path influencing properties. Within a receiving space formed by the support flange and the hood-like cover a plurality of optical modules is arranged, each model is assigned its own optics. The optical modules are thermally coupled to cooling vanes, which, starting from the optical modules, extend a little towards the lamp axis to radially inward. The cooling vanes thus form vertical cooling channels for the lantern inside parallel to the lantern axis by flowing air.

The object of the present invention is to design a lantern of the type mentioned in such a way that a high heat dissipation is made possible while maintaining the emission characteristic.

The object is achieved on the basis of a lantern of the type mentioned at the outset,

- That the cooling fins seen in the axial direction are covered at their ends facing away from the support flange or from the lid with radially inwardly extending to the lantern axis covers, - that the support flange and the lid are annular and extending radially inwardly beyond the central tube to extend to a connecting pipe and

- That the connecting tube extends in Axiahϊchtung seen from the support flange to the cover and is sealed watertight both towards the support flange and towards the lid

Due to the annular configuration of the support flange and the cover and through the connecting pipe thus a kind of chimney is created, can rise through the heated air from the support flange to the cover upwards. The covers ensure that the air flows forcibly along the cooling fins. Furthermore, it is achieved by the embodiment according to the invention that heated air rises only to an extremely small extent outside of the lantern. A flicker effect can thus be effectively avoided. The lighting circuit - usually a light emitting diode circuit - may comprise a plurality of subcircuits, wherein the subcircuits are arranged one above the other in the axial direction and may have different power losses from each other. If, in such an embodiment, two subcircuits are present, the subcircuit with the higher power loss is preferably arranged closer to the support flange than the subcircuit with the lower power loss. If at least three subcircuits are present in such an embodiment, preferably the two axially arranged outside subcircuits on power losses that are at least as large as the power loss of the axially central subcircuit.

The connecting tube is preferably attached to the support flange, the lid on the connecting pipe. But it is also possible to replace one of the two connectors by a welded joint. In this case, alternatively, the connecting tube with the support flange or welded to the lid. A particularly simple type of sealing results when the connecting tube in the region of the plug-in connections radially outwardly has a bevel, which acts in a planar manner together with a sealing element inserted in a recess of the support flange or of the cover. The sealing element is preferably formed as an O-ring.

The lantern is made particularly simple to manufacture, if under the support flange and on the lid in each case at least three heat sinks are arranged, which are identical to each other and each seen in the axial direction have a rectangular envelope contour. In each case four to eight heat sinks, which are arranged in the form of a regular polygon, are preferably present on the cover and under the support flange.

If the heat sinks are welded to the cover or to the support flange, there is a particularly good thermal contact of the heat sink to the cover or to the support flange.

If the lantern has a ventilation device for actively conveying air through the connecting pipe, the cooling power can be increased if necessary. The ventilation device preferably conveys the air from the support flange to the dekelkel. It may optionally be temperature controlled or controlled. If the ventilation device has at least two independently operable fans, it works very reliable, namely in particular even if one of the fans fails.

Preferably, the ventilation device is attached to one of the ends of the connecting tube to the connecting pipe or inserted into the connecting pipe. Because this results in a relatively simple structural design.

The cover, which covers the ventilation device, preferably has an outer element and an inner element, wherein at least the inner element is detachably arranged. Because then the ventilation device is accessible by loosening the inner element. This is particularly useful for maintenance, inspection, repair and replacement of the ventilation device. The cover, which does not cover the ventilation device, however, may be integrally formed.

The ventilation device is preferably attached to the connecting pipe at the support flange-side end of the connecting pipe or pushed into the connecting pipe. Because of this, the achievable by a ventilation device advantages come particularly strong impact.

In the event that the heat dissipation via the central tube to the support flange and / or the lid is not sufficient, it is possible to thermally couple the central tube via arranged in the space between the central tube and the connecting pipe heat conducting to the connecting pipe. The heat-conducting elements can be designed as webs, for example, which each extend axially and radially. They are preferably seen in the axial direction of the support flange and the cover spaced.

It is possible that the heat-conducting elements are releasably connected to the central tube and the connecting tube. It is also possible that the heat-conducting elements are permanently connected to the central tube and the connecting tube. Preferably, however, each of the heat-conducting elements is permanently connected to the central tube or the connecting tube and abuts the respective other tube under press fit.

To optimize the removal of heat via the connecting tube, the connecting tube can have radially projecting cooling ribs. - -

Further advantages and details emerge from the following description of an exemplary embodiment in conjunction with the drawings. Show

FIG. 1 shows a side view of a lantern according to the invention,

FIG. 2 shows a section through the lantern of FIG. 1 along a line H-II in FIG. 1,

FIG. 3 shows a detail of the lantern of FIG. 1,

FIG. 4 shows a further detail of the lantern of FIG. 1,

5 shows a section through the lantern of FIG. 1 along a line V-V in FIG. 4, FIG.

FIG. 6 shows a possible embodiment of a cooling rib,

FIG. 7 shows a further detail of the lantern of FIG. 1,

FIG. 8 shows a section through the lantern of FIG. 1 along a line VIII-VIII in FIG

FIG. 7,

FIG. 9 shows a further detail of the lantern of FIG. 1,

FIG. 10 shows a further detail of the lantern of FIG. 1,

FIG. 11 shows a modification of FIG. 9,

FIG. 12 shows a modification of FIG. 10,

FIG. 13 shows a section perpendicular to the lantern axis through a part of the lantern of FIG

Figure 1 and

FIG. 14 shows a section along a line XTV-XIV in FIG. 13.

The lantern of Figures 1 and 2 is constructed rotationally symmetrical about a lantern axis 1 around. It serves to radiate an optical warning signal around the lantern axis 1 around.

Because of the rotationally symmetrical structure, the lantern axis 1 is a preferred direction. As far as the terms are used axially, radially and tangentially, they therefore refer to the lantern axis L means axially one direction parallel to the lantern axis 1, radially and tangentially mean directions in one Plane that is perpendicular to the lantern axis 1. Radial is a direction in this plane, which is directed to the lantern axis 1 to and away from her. Tangential is a direction in this

Plane around the lantern axis 1, ie perpendicular to radial.

According to FIGS. 1 and 2, the lantern has a main body 2. The base body 2 has a support flange 3 and a central tube 4. Furthermore, the lantern has a belt optical system 5 and a cover 6. The support flange 3 may be connected to the central tube 4, for example via a weld 7. However, this is not absolutely necessary. The belt optics 5 can be placed on the support flange 3. Between the drum optics 5 and the support flange 3 sealing elements 5 'are arranged, which cause a watertight seal. For example, - see schematically Figure 3 and compare also DE-U-203 05 625 - two O-rings 5 'may be provided.

The lid 6 can be placed on the belt optics 5 and the central tube 4 and clamped to the base body 2 fastened. Also between the drum optics 5 and the lid 6 are sealing elements 5 "provided, which cause a watertight closure (see again Figure 3 and DE-U-203 05 625).

The main body 2, the drum optical system 5 and the lid 6 form a Aufhahrneraurn 8, which extends around the lamp axis 1 in a ring around. In this receiving space 8, a lighting circuit 9 can be arranged.

Seen in the axial direction, heat sinks 10 are arranged below the support flange 3 and on the cover 6. The heat sinks 10 are preferably welded to the support flange 3 or to the cover 6. This can be seen in FIGS. 1 and 2 by corresponding drawn in welds 11.

As can be seen from FIGS. 4 and 5, a plurality of such heat sinks 10 are arranged on the cover 6. The heatsink 10 are formed equal to each other and have seen hi axial direction in each case a rectangular envelope contour.

According to FIGS. 4 and 5, four heat sinks 10 are provided on the cover 6. However, it would also be possible to have only three heat sinks 10 or more than four heat sinks 10, in particular 6 or 8 heat sinks 10. The heat sinks 10 are preferably arranged in the form of a regular polygon. Shock regions 12 between the heat sinks 10 are preferably sealed, z. B. by means of welds 13.

The heat sink 10 have according to Figures 4 and 5 on cooling fins 14, which are spaced apart. The cooling fins 14 are seen from the cover 6 in the axial direction. As far as necessary for the optimization of the heat dissipation, the cooling fins 14 according to FIG. 6 can also be ribbed again. At their ends facing away from the lid 6, the cooling fins 14 are covered with a lid-side cover 15. The lid-side cover 15 may alternatively be releasably or non-detachably connected to the heat sinks 10 and / or the cover 6. It extends, starting from the heat sinks 10, radially inward to the lantern axis 1. It is preferably formed in one piece. It adjoins the cooling fins 14 directly (ie without any appreciable distance). In particular, any distance of the cover-side cover 15 from the cooling fins 14 is considerably smaller (eg, at most 10 to 20%) than the distance between the cooling fins 14 from one another.

FIGS. 7 and 8 show the corresponding embodiment of the heat sink 10 under the support flange 3. This embodiment is substantially mirror-inverted to the embodiment of FIGS. 4 and 5, so that reference is made to the above explanations regarding FIGS. 4 and 5. In particular, the configuration of the individual cooling ribs 14 can be analogous to FIG. 6 here as well.

In contrast to the cover-side cover 15, a support flange-side cover 16 is formed in two pieces. It has in particular an outer element 17 and an inner element 18. Also, the support flange side cover 16 extends, starting from the heat sinks 10 radially inward to the lamp axis. 1

The outer member 17 may be releasably or permanently attached to the cooling bodies 10 and the support flange 3. The inner element 18, however, is always arranged detachably. It may be attached to the outer element 17, to the heat sinks 10 or the support flange 3. By removing the inner member 18, an inner portion 19 of the polygon, which is formed by the Auflagenflanschseitig arranged heat sink 10, easily accessible. The meaning and purpose of this embodiment will be apparent later.

According to Figure 2, the support flange 3 and the cover 6 are annular. So they each have a central recess 3 'and 6' on. In particular, they extend from radially outward over the drum optical system 5 radially inward, specifically beyond the central pipe 4 to a connecting pipe 20. The connecting pipe 20 extends in the axial direction from the bearing flange 3 to the cover 6. It is directed both towards the bearing flange 3 as well sealed to the lid 6 towards waterproof.

According to Figure 9, the connecting tube 20 is attached to the support flange 3. According to FIG. 10, the cover 6 is attached (inter alia) to the connecting tube 20. The seal between the connecting tube 20 and the support flange 3 or the de "

disgust 6 is achieved in that the support flange 3 and the lid 6 recesses 21, in each of which a sealing element 22 is inserted, for example, an O-ring 22. The connecting tube 20 has at its ends radially outside chamfers 23, which with the Seal elements 22 cooperate surface.

According to FIGS. 9 and 10, the connecting tube 20, seen in the axial direction, abuts both the support flange 3 and the cover 6. The recesses 21 and the connecting tube 20 are therefore matched to one another such that the connecting tube 20 is fixed axially free of play. Furthermore, the connecting tube 20 is also radially on the recesses 21 of the support flange 3 and the lid 6 at. Thus, there is also a radial clearance centering of the connecting tube 20th

The above-described two-sided connector of the connecting tube 20 is preferred because of their ease of solvability and ease of installation. But it would also be possible to provide only one side, so either only to Aufiageflansch 3 or only to cover 6 out a plug connection and make a weld on the other side. FIGS. 11 and 12 show such embodiments with a welded connection. FIG. 11 shows a welded connection between support flange 3 and connecting tube 20, FIG. 12 shows a welded connection between cover 6 and connecting tube 20.

In order that the power dissipated in the lighting circuit 9 is dissipated to the heat sink 10, the lighting circuit 9 must be thermally coupled to the support flange 3 and the cover 6. This can be done, for example-see schematically FIG. 3-by means of corresponding slip rings 24, which provide direct thermal coupling of the

Luminous circuit 9 to the support flange 3 and the lid 6 effect. The Beilegringe 24 preferably consist of a known heat conducting foil, which is electrically insulating, slightly elastic and good heat conducting. The Beilegringe 24 have in the axial direction typically a thickness of 0.1 to 0.3 mm, z. B. about 0.2 mm.

Alternatively or additionally, it is also possible that the lighting circuit 9 - is thermally coupled to the central tube 4, for example via a known heat conducting foil 25 and the central tube 4 in turn is thermally coupled to the support flange 3 and the cover 6. The heat-conducting foil 25 is also electrically insulating. But it has a significantly greater thickness in the radial direction than the Beilegringe 24 in the axial direction. The thermal coupling of the central tube 4 to the support flange 3 can be effected for example by the already mentioned weld 7. The thermal coupling of the central tube 4 to the lid 6 can be effected in that the lid 6 rests directly on the central tube 4 and is pressed flat against the central tube 4.

The last-described indirect thermal coupling, ie the thermal coupling of the lighting circuit 9 to the support flange 3 and the cover 6 via the central tube 4, is at least compulsory when the lighting circuit 9 - see Figure 2 - more than two sub-circuits 26 to 28 has which are arranged one above the other in the axial direction. Because in this case a sufficiently good thermal coupling at least the central subcircuit 27 can only be achieved via the central tube 4.

If the subcircuits 26 to 28 have the same power losses, the sequence of the subcircuits 26 to 28 is of course arbitrary as far as the dissipation of the power loss is concerned. If, on the other hand, subcircuits 26 to 28 have different power losses from each other, the following rules should be observed:

- The case that a sub-circuit 26 to 28 is not directly adjacent to the support flange 3 or the cover 6, can only occur if at least three sub-circuits 26 to 28 are arranged axially one above the other. In this case, there are two outer ones

Sub-circuits 26, 28 present and a central sub-circuit 27. The power loss of the two axially outer sub-circuits 26, 28 should be at least as large as the power loss of the axially middle Teilschaϊtung 27 in this case.

- If seen in AxiaMchtung two part circuits 26, 28 are present, one of which is closer to the support flange 3 and the other closer to the cover 6, in case of doubt that subcircuit 28 should have the higher power loss, which is located closer to the support flange 3.

Since the air below the support flange 3 and above the cover 6 due to the covers 15 and 16 can only flow radially, it flows forcibly along the cooling fins 14, whereby a good cooling is effected. At relatively low dissipated power losses and / or relatively low outdoor temperatures and / or at relatively high natural air movement (wind) already caused by the natural cooling may be sufficient. In this case, no further action is required.

In the event that the measures described so far are not sufficient to safely dissipate the heat generated in the lighting circuit 9, the later invention ne according to Figures 13 and 14 additionally have heat-conducting elements 31. The heat-conducting elements 31 are arranged in an annular space 32 between the central tube 4 and the connecting tube 20. In this case, the central tube 4 is thermally coupled to the connecting tube 20 via the heat-conducting elements 31. On the one hand, the dissipated heat can therefore also be conducted via the connecting tube 20 to the support flange 3 and to the cover 6. On the other hand, the heat from the connecting pipe 20 can also be delivered directly to the air flowing through the connecting pipe 20.

If required or desired, the connecting tube 20 may have cooling ribs 33 which project radially inwards from the connecting tube 20. The Kühhippen 33 may optionally be formed according to the embodiment shown in Figure 6.

According to FIGS. 13 and 14, the heat-conducting elements 31 are designed as webs 31. Each of the webs 31 extends in each case in a plane which contains the lantern axis 1. The webs 31 thus each extend radially and axially.

The number of webs 31 is basically arbitrary. At least it is 3. Usually the number ranges between 4 and 12, for example 6, 8 or 10.

The webs 31 may extend in Axiahϊchtung extent that they are seen in the axial direction abut the support flange 3 and / or on the cover 6. Preferably, however, they are spaced according to Figure 14 from the support flange 3 and the cover 6.

The heat-conducting elements 31 are preferably non-detachably connected to one of the tubes 4, 20. Thus, for example, in Figures 13 and 14 as insoluble compounds

Welds 34 located. At the respective other tube 20, 4, the heat-conducting elements 31 are preferably flat under press fit. This is indicated in FIGS. 13 and 14 by arrows 35, which are intended to symbolize the force exerted by the heat-conducting elements 31 on the respective other tube 20, 4.

The interference fit can be achieved by appropriate dimensioning of the tubes 4, 20 and the heat-conducting elements 31. In addition, the heat-conducting elements 31 may be fixed to the tube 20, 4, on which they rest under press seat, for example by means of one or more screws.

It is possible that all heat-conducting elements 31 are permanently connected to the central tube 4. It is also possible, as an alternative, for all the heat-conducting elements 31 to be connected to the connector. Manifold 20 are permanently connected. Furthermore, it is possible and also shown in FIGS. 13 and 14 that the heat-conducting elements 31 are connected inseparably with the central tube 4 and the connecting tube 20 alternately.

As an alternative or in addition to the measures described above in conjunction with FIGS. 13 and 14, the lantern according to the invention - see FIG. 2 - can have a ventilation device 29, by means of which air can be actively conveyed through the connecting tube 20. For reasons of reliability, the ventilation device 29 preferably has at least two independently operable fans 30. The ventilation device 29 is preferably operated in such a way that it conveys air from the support flange 3 to the cover 6, ie in the natural convection direction. If necessary, the ventilation device 29 may be regulated, for example as a function of the temperature.

As can be seen from FIGS. 2 and 8, the ventilation device 29 is attached to the connecting tube 20 at the end of the connecting tube 20 on the flange side. Alternatively, it could, as indicated by dashed lines in Figure 2, also be inserted into the connecting tube 20. Due to this arrangement, the pad flange side cover 16, the detachable inner member 18. Because of this, the ventilation device 29 is accessible when the inner element 18 has been removed. This is particularly necessary for the inspection, maintenance, repair or replacement of the ventilation device 29.

In order to effect a good heat conduction, the following elements of the lantern are preferably made of aluminum:

the support flange 3,

the central tube 4,

the cover 6, the heat sink 10,

- The cover-side cover 15 and the Auflageflanschseitige cover 16 and

- The sub-circuits 26 to 28, as far as their purely mechanical elements.

Also, the connecting pipe 20, the heat-conducting elements 31 and the cooling fins 33 may be made of aluminum. By means of the lantern according to the invention a good dissipation of the resulting power loss can be achieved. As a result, a light-emitting circuit 9 can be realized, which has a luminosity previously unattainable with light-emitting diodes, in particular of more than 10,000 candela.

LIST OF REFERENCE NUMBERS

1 lantern axis

2 main body

3 support flange

3 ', 6' central recesses

4 central tube

5 belt look

5 ', 5 ", 22 sealing elements

6 lids

7, 11, 13, 34 welds

8 recording room

9 lighting circuit

10 heatsinks

12 impact areas

14, 33 cooling fins

15, 16 covers

17 outer element

18 interior element

19 indoor area

20 connecting pipe

21 wells

23 bevels

24 slip rings

25 heat-conducting foil

26, 27, 28 subcircuits

29 ventilation device

30 fans

31 heat-conducting elements

32 space

35 arrows

Claims

claims

1. Lantern for all around emitting a warning signal around a lantern axis (1) around, with a base body (2), a belt optics (5) and a lid (6),

- Wherein the base body (2) has a support flange (3) and a central tube (4), - wherein the belt optics (5) on the support flange (3) and the cover (6) on the drum optics (5) and the central tube (4 ) can be placed, so that the base body (2), the drum optical system (5) and the cover (6) form a receiving space (8) extending in an annular manner around the lantern axis (1), in which a lighting circuit (9) is arranged, - wherein the lighting circuit (9) is thermally coupled to the support flange (3) and to the cover (6),

- Seen in the axial direction below the support flange (3) and on the cover (6) heat sink (10) are arranged, which have spaced Kühhippen (14) seen in the axial direction of the support flange (3) or from the lid (6) stand apart, characterized

- That the cooling fins (14) seen in the axial direction at their from the support flange (3) and the cover (6) facing away from ends radially inwardly to the lantern axis (1) extending covers (15, 16) are covered, - that the Support flange (3) and the cover (6) are annular and extend radially inwardly beyond the central tube (4) also up to a connecting tube (20) and

- That the connecting tube (20) extends in the axial direction of the support flange (3) to the cover (6) and both the support flange (3) and towards the lid (6) is completed watertight.

2. Lantern according to claim 1, characterized in that the lighting circuit (9) has at least two seen in the axial direction superimposed sub-circuits (26, 28), one of which has a higher power dissipation than the other sub-circuit (26) and that the higher power dissipation send sub-circuit (28) closer to the support flange (3) is arranged as the other sub-circuit (26).

3. Lantern according to claim 1 or 2, characterized in that the lighting circuit (9) has at least three seen in the axial direction superimposed subcircuits (26, 27, 28) and that the power losses of the two axially outer subcircuits (26, 28) at least as are large as the power loss of the axially middle subcircuit (27).

4. Lantern according to claim 1, 2 or 3, d a d u r c h e c e n e c e s in that the connecting tube (20) on the supporting flange (3) and the lid (6) are fitted on the connecting tube (20).

5. Lantern according to claim 1, 2 or 3, d a d u r c h e c e n e c e s in that the connecting tube (20) to the support flange (3) is welded and that the lid (6) is attached to the connecting tube (20).

6. Lantern according to claim 1, 2 or 3, d a d u r c h e c e n e c e s in that the connecting tube (20) with the lid (6) is welded and that the connecting tube (20) is mounted on the support flange (3).

7. Lantern according to claim 4, 5 or 6, characterized in that the connecting tube (20) in the region of the connectors radially outwardly a chamfer (23) having with a in a recess (21) of the support flange (3) and the lid (6) inserted sealing element (22) interacts flat.

8. Lantern according to one of the above claims, characterized in that under the support flange (3) and on the cover (6) each have at least three cooling body (10) are arranged, that the heat sink (10) are formed equal to each other and that the Heatsink (10) seen in Axiahϊchtung each having a rectangular envelope contour. - -

9. Lantern according to one of the above claims, characterized in that the heat sink (10) to the cover (6) or to the support flange (3) are welded.

10. Lantern according to one of the above claims, characterized in that it has a ventilation device (29) for actively conveying air through the connecting tube (20)

11. Lantern according to claim 10, characterized in that the ventilation device (29) has at least two independently operable fans (30).

12. Lantern according to claim 10 or 11, d a d u r c h e c e n e c e s in that the ventilation device (29) at one of the ends of the connecting tube (20) attached to the connecting tube (20) or inserted into the connecting tube (20).

13. Lantern according to claim 12, characterized in that the cover (16) which covers the ventilation device (29) with an outer element (17) and an inner element (18) and that at least the inner element (18) is detachably arranged.

14. Lantern according to claim 12 or 13, d a d u r c h e c e n e c e s in that the cover (15) which does not cover the ventilation device (29), is integrally formed.

15. Lantern according to claim 12, 13 or 14, characterized in that the ventilation device (29) at the support flange side end of the connecting tube (20) attached to the connecting tube (20) or inserted into the connecting tube (20). - -

16. Lantern according to one of the above claims, characterized in that the central tube (4) via in the space (32) between the ZentraLrohr (4) and the connecting tube (20) arranged thermally conductive elements (31) thermally coupled to the connecting pipe (20) is.

17. Lantern according to claim 16, in which a heat-conducting element (31) is formed as webs (31) which extend axially and radially in each case.

18. Lantern according to claim 17, characterized in that the webs (31) in the axial direction seen from the support flange (3) and the cover (6) are spaced apart.

19. The lantern according to claim 16, 17 or 18, characterized in that each of the heat-conducting elements (31) with the central tube (4) or the connecting tube (20) is permanently connected and on the other tube (20, 4) press-fitted flat.

20. Lantern according to one of claims 16 to 19, characterized in that the connecting tube (20) has radially inwardly projecting cooling ribs (33).