WO2012130660A1

WO2012130660A1 - Discharge lamp arrangement comprising adapter and hollow coupling cylinder

Info

Publication number: WO2012130660A1
Application number: PCT/EP2012/054835
Authority: WO
Inventors: Jürg NIGG
Original assignee: Nigg Juerg
Priority date: 2011-04-01
Filing date: 2012-03-19
Publication date: 2012-10-04
Also published as: CH704765B1; CH704765A1; DE112012001533A5

Abstract

The invention relates to a discharge lamp (3) having a base (7), being mechanically clamped on an external thread (19) of an adapter (13) by means of a hollow coupling cylinder (21) having an internal thread (23). The hollow coupling cylinder (21) made of metal also reduces heating of the adapter (13) due to radiating to the environment (U).

Description

DISCHARGE LAMP ARRANGEMENT COMPRISING ADAPTER AND LIGHT CYLINDER

The present invention relates to a

A discharge lamp assembly comprising at least one discharge lamp with a base for the discharge path, wherein the base has a first surface from which protrudes the discharge path and a second, the first opposite

Surface from which a lamp plug protrudes or projects into a socket.

The Entladelampenanordnung further comprises an adapter to the one base of a connection for an electrical network is attached to the other base a

Socket for the plug part of the discharge lamp, or a plug for the socket of the discharge lamp

is appropriate. For example, the connection of the type E10, EP10, E14, E27, E40, if necessary. also be BA9, BA15 etc.

Such discharge lamp arrangements are known. By means of the adapter on the one hand, electro-mechanically, the

Connecting the discharge lamp with its plug part or optionally its socket over the mentioned

Connection to a corresponding connection of a

electric network, in particular a public

Network, e.g. with 230V, 50Hz AC voltage allows, on the other hand, electrically, in the adapter the electric

Signal of said network in a different, necessary for the operation of the discharge lamp electrical

Signal changed. In contrast to Entladelampenanordnungen on which the mentioned signal conversion takes place on the corresponding electronically equipped discharge lamp itself and are themselves provided with the mentioned connection, the provision of an adapter has the great advantage that only the latter must be replaced if the discharge lamp. The adapter will continue to be used.

The two-part design of the Entladelampenanordnung requires a detachable connection between the lamp and adapter, namely electrically and mechanically.

But if the electrical connection from adapter to

Unloading lamp first interrupted, then restored, the adapter automatically ignites the discharge lamp again. The

Lifespan of discharge lamp and adapter is determined by the

Number of experienced ignition cycles decisively determined.

Thus, if discharge lamp arrangements of the type mentioned above are mounted in environments in which they are exposed to shocks, such as, for example, in areas of roads, railways, etc., then it often results that due to the

Vibrations the discharge lamp is ignited again and again.

According to DE 198 257 81 it is therefore known to secure the lamp to the adapter by means of a union nut. For this purpose, the outer surface of the adapter, the one

Cylinder surface spans, an adpater external thread, and there is a union nut provided with internal thread, which can be screwed to the adapter external thread. The union nut is supported on the base of the lamp. Similarly, it is known from DE 20 2007 000 587 Ul to provide an external thread on the adapter. A ring with

Internal thread, matching the external thread of the adapter, which has a flange on the inside, is supported, screwed, on projections on the outside of the

Lamp sockets off.

Discharge lamps, in particular high-performance discharge lamps, e.g. Types 26W, 32W, 42W or even 57W generate a lot of heat. The life of the adapter with the built-in electronics is extremely sensitive to the operating temperature of the adapter. Heating electronic components in the adapter by 7 ° C to 10 ° C can halve the life of the adapter electronics.

Thus, there is a tradeoff between rigid and secure connection and coupling of the discharge lamp with the adapter on the one hand, namely, which amplifies the heating of the adapter by the discharge lamp, and the endeavor, the

Operating temperature of the adapter as possible

Ambient temperature.

It is an object of the present invention to provide an arrangement of the type mentioned which a longer

Lifespan has.

This is the said arrangement, in which the outer surface of the adapter spans a cylindrical surface and with a

Adapter male thread is provided, and a hollow collar cylinder is provided with internal thread, wherein the internal thread with the adapter male thread is screwed and the

Überwurfhohlzylinder itself - in assembled state - in Area of its one end supported on the base, thereby achieved that the hollow cap cylinder is made of metal.

The invention is based on the following findings:

According to the invention, the discharge lamp and the adapter are now by means of the metallic hollow cylinder

schraubverspannt. As a result, on the one hand, mechanical relative movements, such as vibrations, between discharge lamp and adapter continue to be reliably prevented. On the other hand, but now heat is dissipated by the discharge lamp with its base on the metallic hollow cylinder and radiated from the latter to a substantial extent in the environment of the arrangement, so that only a reduced proportion of the lamp-generated heat to the adapter and its

Electronics is delivered.

By means of the hollow cylindrical metal cylinder, a good thermal conductive connection between the discharge lamp and adapter is created, which due to the good thermal

Conductivity virtually "short circuits" all other thermal transitions between lamp and adapter.

This virtually eliminates the entire heat flow

The lamp and adapter are routed to the mentioned hollow metal cylinder. This may seem like so far

disadvantageous, as it creates an additional good thermal connection between the discharge lamp and the adapter, from which, at first sight,

should result that at the discharge lamp

generated heat is still increasingly supplied to the adapter. However, this is not the case because the mentioned hollow cylinder on metal simultaneously and with large surface to the environment releases heat and thus a significant part of the heat flow of the

Discharge lamp is discharged to the environment and is not supplied to the adapter. Seen in the thermal equivalent image, the mounted hollow cylinder made of metal appears as a series circuit distributed thermal

Impedances between discharge lamp and adapter with, in between, thermal impedance to the environment as

Heat sink. Due to the large exposed surface of the Überwurfhohlzylinders are the

The last-mentioned thermal impedances to the environment are small, which primarily thermally coupled the lamp but also the adapter thermally with the environment as with each other.

In the context of the present description and the present claims, the "discharge path" of the discharge lamp is understood to mean that part of the discharge lamp which emits light into the environment.

By supporting the hollow collar cylinder on the base, the discharge lamp with the adapter is also tensioned when screwing the hollow collar cylinder with the adapter. The abovementioned support can, the requirement of the corresponding

Abutment of the hollow hollow cylinder on the base fulfilling constructive realized in various ways.

Basically, in addition, between capped hollow cylinder and

Lamp socket, the contact surface designed so that the best possible heat transfer from the base is guaranteed at the hollow collar cylinder.

In one embodiment of the inventive arrangement, which can be combined with all embodiments still to be explained is, the Überwurfhohlzylinder in the region of its one end a collar on which is supported on the first surface of the base. As a result, no additional formations are necessary on the base side.

In a further embodiment of the inventive

Arrangement that can be combined with all of the above-mentioned and yet to be mentioned embodiments, / the second surface of the base and / or the other base of the adapter is shaped so that, in tension of the base and adapter by means of the hollow cylinder, an air gap between at least areas of these surfaces is formed. Due to such an air gap, the heat conduction is prevented directly from the discharge lamp to the adapter significantly and performed on the hollow cap cylinder. It becomes so, parallel to the small thermal impedance of the

Cylindrical hollow cylinder made of metal, the thermal impedance between the lamp base and adapter increases what the

Increases unwanted heat flow through the hollow cylinder to the environment.

In a preferred embodiment of the latter

Embodiment with air gap, the second surface of the base on the discharge lamp and the other base on the adapter are at least approximately planar, and there are at least one of said surfaces, preferably on the adapter side, spacer projections formed. As a result, an air gap along the said surface is determined over a large area when the base and adapter are preloaded by means of the hollow hollow cylinder. In a further embodiment of the arrangement according to the invention, which can be combined with all the above-mentioned embodiments or those which are still executed, if not in contradiction, the hollow throw-over cylinder has one

Section of azimuthally distributed slots. As a result, the heat output from the discharge lamp to the environment is further improved.

Will these slots be in a section of the

An attached hollow cylinder made of metal, which with respect to the lateral surface of the adapter and / or the

Socket the latter encloses spaced encloses, then there is a ventilation of the mentioned Überwurfhohlzylinders in this section. Thus, the adapter or socket facing surfaces of the hollow collar cylinder give off heat to the environment, whereby the dissipation of heat from

Überwurfhohlzylinder to the environment is further improved.

Preference is further the mentioned slots in one

Built-in section of the hollow cylinder, bridges the socket and adapter. If there is an air gap between base and adapter, as mentioned above, an additional air circulation results through the mentioned slots and the air gap.

This can even be achieved that not only the adapter is not additionally heated by the discharge lamp, but the adapter is cooled by the amount of heat dissipated by the adapter in the environment is greater than that of the discharge lamp supplied to the adapter.

In a further embodiment are in the region of said slots between the outer surface of the base and / or the adapter and the inner surface of the

Überwurfhohlzylinders air spaces available, which, as mentioned above, in principle, the heat dissipation is improved in the environment.

In a further embodiment of the arrangement according to the invention which can be combined with all of the aforementioned embodiments and those yet to be mentioned, at least the outer surface of the hollow hollow cylinder is black and preferably surface-enlarged, preferably

roughened. As a result, the heat radiation from the

Collar hollow cylinder to the environment further improved.

In a further embodiment of the inventive arrangement which can be combined with all the aforementioned embodiments, the collar is on

Round hollow cylinder revolving. The projection can in principle be formed by corresponding staple-like projections, but is preferably circumferential, polygonal or circular, with which the thermal transition of

Collar hollow cylinder and socket is further optimized.

Furthermore, the hollow throw-over cylinder is preferably designed so that it can be used with discharge lamps of different base design. This can be realized so that the mentioned collar can be supported on differently shaped and / or dimensioned sockets. Greater flexibility with respect to use on discharge lamps with differently shaped and / or dimensioned sockets is provided by the further embodiment of the

achieved arrangement according to the invention, in which the

Hollow cylinder one of a part of the Coil hollow cylinder with the female thread dismantling fitting part comprises and the Überwurfhohlzylinder supported on the fitting on the base. These too

Embodiment is combined with all the aforementioned. It can be with a corresponding sentence of

Fit fitting parts of the hollow sleeve cylinder with a variety of discharge lamp sockets.

In one embodiment of the said fitting part, it is formed by a peripheral frame which in the assembled state of the arrangement between the part of

Collar hollow cylinder with the internal thread and base of the discharge lamp is clamped.

In addition, it was recognized that due to the metallic hollow cylindrical cylinder high frequency interference from the adapter into the environment are significantly reduced:

The metallic hollow collar cylinder additionally acts as electromagnetic shielding of the adapter electronics and the lamp base.

In a further embodiment of the

Entladelampenanordnung, with all the above

Embodiments can be combined, as well as those listed below, unless contradictory, the Überwurfhohlzylinder is on its outer surface as

Heatsink formed with projecting cooling surfaces.

This further increases the heat dissipation to the environment.

In a further embodiment of the discharge lamp arrangement according to the invention, which can be combined with all the aforementioned embodiments and those yet to be mentioned is, unless contradictory, is a heat sink, preferably an annular, on the

External surface of the hollow collar cylinder interchangeable

assembled. This creates the possibility, depending on the type of discharge lamp used and the corresponding

Heat generation, the heat dissipation from the hollow cylinder to the environment targeted to measure.

In a further embodiment of the discharge lamp arrangement according to the invention, in which a heat sink is present on the outer surface of the hollow hollow cylinder or can be mounted thereon interchangeably, the one mentioned is

Heatsink axially along the Überwurfhohlzylinders positioned at different positions.

This will achieve that along the mentioned

Überwurfhohlzylinders the heat sink selectable closer or further from the base or from the adapter can be positioned, which depending on the heat development on the discharge lamp or the adapter, the heat dissipation from the respective heat sources to the environment can be optimized.

In a further embodiment of the discharge lamp according to the invention, in which a heat sink can be mounted interchangeably on the outer surface of the hollow hollow cylinder, a plurality of different heat sinks are provided for setting the heat removal from the need

Cover hollow cylinder to the environment. Considering that, as mentioned above, the arrangement can be designed so that on an adapter with a given external shape and possibly with the same built-in electronics different discharge lamps, especially with respect to their performance and thus heat development can be used, it follows from the last-mentioned embodiment, the possibility, depending on the discharge lamp used and corresponding

Heat development, targeted to apply different heatsinks from the set of several different heatsink on the adapter and thus flexibly take into account the respective needs for heat dissipation to the environment.

The invention will be further explained, for example, with reference to figures.

Show it:

Fig. 1 shows an embodiment of the inventive

Arrangement, partially cut

Side view;

Fig. 2 simplified, the thermal equivalent circuit diagram of the inventive Entladelampenanordnung, and

Fig. 3 in a simplified representation, a side view of an inventive Entladelampenanordnung in a further embodiment.

The discharge lamp arrangement according to the invention in the embodiment according to FIG. 1 comprises a discharge lamp 3 with

Discharge path 5 and preferably substantially cylindrical base 7. From one surface 7 _{0 of} the base 7 protrudes the discharge gap 5, while from the second, the first opposing surface 7 _U a usually cubic plug part 9 protrudes with metallic pins 11. An adapter 13, substantially cylindrical, has a base surface 13 _u from which a standard Connection 15, for example, a screw connection for electrical network, for example, a public network protrudes. On another base surface 13 _{Q of} the adapter 13, which is a surface 13u opposite, as shown schematically at 17, a socket for the plug part 9 with the

Terminal pins 11 of the discharge lamp 3 is provided. in the

Adapter 13, as shown only schematically at 20, electronics installed by means of which the terminal 15 supplied electrical signal, eg. From a 230V / 50Hz network, in the for the operation of the discharge lamp. 3

necessary operating signal is converted.

The adapter 13 has on its cylindrical outer surface an adapter external thread 19, according to the figure in FIG

Section A. A Überwurfhohlzylinder 21 made of metal, for example. Aluminum, has an internal thread 23, according to the figure along a portion B of its cylindrical inner wall. The cap hollow cylinder 21 is supported at its one end 21 ₀ on the base 7 of the discharge lamp 3, such that when the hollow collar 21 is screwed with its internal thread 23 on the adapter external thread 19, the discharge lamp is firmly clamped to the adapter 13.

According to the embodiment of FIG. 1, the cap hollow cylinder 21 is braced with a projection 25 on the first surface 7 _{Q of} the base 7. The projection 25 is preferably circumferential, and biases the clear opening 26, polygonal or circular.

The second surface 7 _{U of} the base 7 and the other, the surface 7 _U opposite base 13 _{D of} the adapter 13 are formed in the embodiment shown so that if by means of the throw-over hollow cylinder 21 discharge lamp 3 and adapter 13 are braced, at least in one

Section between socket 7 and adapter 13 an air gap remains. In the embodiment according to the figure, this is achieved in that on the surface 13 _{G of} the adapter spacer projections 27 are formed in shape

towering pimples.

The Überwurfhohlzylinder 21 has further in the illustrated embodiment in a section azimuthally distributed slots 29, which in the assembled state of the arrangement, in a socket 7 and the adapter 13 bridging portion of the hollow hollow cylinder 21st

are incorporated.

In this case, the wall of the Überwurfhohlzylinders 21st

at least in those sections in which the azimuthally distributed slots 29 are provided, spaced from the outer surface of the base 7 and / or from the outer surface of the adapter 13 so that therebetween

Air gap exists. This makes it possible for the air of the surroundings U to come into contact both with outer surfaces and with inner surfaces of the hollow hollow cylinder 21.

Furthermore, at least the outer surface 21a of the

Cover hollow cylinder black and preferably

surface enlarged, preferably roughened.

By the arrangement shown is by means of the

Überwurfhohlzylinders 21 on the one hand the discharge lamp 3 clamped mechanically immovable on the adapter 13, by tightening the hollow collar cylinder 21 on the external thread 19th of the adapter 13. This prevents vibrations for a short time the electrical connection, how about the

Contact pins 11, between the discharge lamp 3 and adapter 13 can interrupt, which would lead to repeated ignition of the discharge lamp 3 through the adapter and so significantly the lifetime of the particular

Would reduce adapter electronics.

On the other hand, however, the heat generated at the discharge lamp 3 is now largely dissipated to the hollow jacking cylinder 21 and radiated from it to the environment. The preferably provided air space 28

between base 7 and adapter 13 forms a heat insulation between the base 7 and adapter, which enhances the dissipation of heat through the hollow cylinder 21. The slots 29 cause, in particular in a portion of the

ÜberwurfZylinders 21 arranged the base 7 and adapter 13 bridged, another, the base 7 cooling air supply with circulation in the air gap 28. This results in not only a heat dissipation from the discharge lamp 3 towards the adapter 13 is substantially prevented, but also results a heat dissipation from the adapter 13 to the environment U, which may be greater than the heat supply from the

Discharge lamp 3 to the adapter 13. It results that while the adapter 13 is additionally cooled.

By providing the aforementioned hollow hollow cylinder made of metal thus on the one hand the discharge lamp. 3

mechanically firmly clamped to the adapter and on the other hand, a heating of the adapter 13, also by the

Discharge lamp, reduced. As already mentioned, it is advantageous if one and the same hollow hollow cylinder 21 with a large variety as possible differently shaped and / or

different sized socket 7 can be used. On the one hand, this can be achieved by dimensioning the projection 25 and thus the clear opening 26 in such a way that differently dimensioned and / or shaped bases 7 are overmolded.

A particularly high application flexibility in this respect is achieved, however, in that the cap hollow cylinder 21 comprises a part of the cap hollow cylinder 21 with internal thread 23 demountable metallic adapter part, as shown in phantom in the figure at 25 _a . As a result, one and the same hollow hollow cylinder 21 can be flexibly adapted to differently dimensioned and / or shaped lamp sockets 7, and their large-area contacting by the hollow hollow cylinder can also be ensured in equal measure. By providing a set of such fitting parts 25 _a becomes high

Flexibility achieved by appropriate assembly of Überwurfhohlzylinders 21 to use a variety of different lamp socket 7 can.

The Anpassteil 25 _a is in the embodiment according to the figure frame-shaped, polygonal or

annular and is in accordance with said

Embodiment between the part of the hollow collar cylinder with the internal thread 23 and the base 7 tightened.

The expert opens up many possibilities, the clear opening 26 of the hollow hollow cylinder 21 by means Adjust fitting parts according to 25a to the respective needs with respect to socket 7 and arrangement of the discharge section 5.

In Fig. 2 is schematically and simplified, the equivalent thermal circuit diagram of the inventive

Entladelampenanordnung shown. Between base 7 and adapter 13 there is a first heat conduction connection, with reference to FIG. 1, via the air gap 28 defined by means of the distance projections 27 and via the connection pins 11. In FIG. 2 this is due to the thermal impedance or the thermal resistance Z ₇ i ₃ shown. Of the

Überwurfhohlzylxnder 21 thermally connects the base 7 with the adapter 13 via a thermally well conductive

Metal compound, shown in Fig. 2 by the

distributed thermal impedances or resistors Z ₂ i _a - Z ₂ i _d - socket 7 and adapter 13 act depending on

Temperature level as heat sinks or heat sources.

The throw-over hollow cylinder 21 is further thermally conductive with the environment U, usually acting as a heat sink,

connected, as shown in Fig. 2 on the distributed thermal impedances or resistors Z _Ua ... Z _0c . It is readily apparent that due to the high

Thermal conductivity of the Überwurfhohlzylinders 21 and

corresponding to low thermal resistances Z ₂ i _a - Z ₂ i _d thermally the heat conduction via Z ₇ i _{3 is} negligible. The low thermal resistances corresponding to Z _0a - Z _Uz from the surface of the hollow hollow cylinder 21 to the environment ensure that at least a large part of the heat dissipated by the base 7 and / or adapter 13 is dissipated to the heat sink of the environment U.

By appropriate design of the _{hollow collar cylinder} with the mentioned slots or its surface design, the mentioned thermal resistances according to Z _üa ... Z _{üc are} kept as low as possible in sections or as a whole.

Now it may be good, the mentioned thermal resistances Z _0a ... Z _Uc in sections along the axial extent of the hollow cap cylinder 21 to further reduce, for example, depending on the discharge lamp used and their performance or heat generation. According to FIG. 3, for this purpose, a heat sink 30 is applied on the outer surface of the hollow hollow cylinder 21 with large protruding, free from the environment cooling surfaces. The heat sink 30 can be fixedly mounted on the hollow collar cylinder 21 or formed integrally with the latter, but will

preferably exchangeable on the outer surface of the

Überwurfhohlzylinders 21 applied as needed. This can be done by screwing, clamped mounting, hanging, etc., while maintaining the condition that the largest possible heat connection surfaces between the heat sink 30 on the one hand and the surface of the hollow cap cylinder 21 are formed. Looking back on the substitute image of Fig. 2, it will be appreciated that by providing such

Heat sink 30 one or more of the distributed

Heat conduction resistances according to Z _Ua ... Z _Uc authoritative

be reduced. Depending on the case-by-case heat development of the discharge lamp, 30 different heat sinks 30 can be mounted in the case of interchangeable heat sinks. As with the Double arrow V shown in Fig. 3, it may also be good, one and the same heat sink 30, in the axial direction of the arrangement, according to the direction of the double arrow V on

to position various positions on Überwurfhohlzylinder 21. This makes it possible, with reference to FIG. 2, to optimally adjust the heat flow or the total heat flow conditions, including those to the surroundings U, on a heat flow divider and, as shown by the adjusting arrow on the thermal _resistances Z or Z _Uc .

Claims

claims

Discharge lamp assembly comprising:

• at least one discharge lamp (3) with a base

(7) for the discharge path (5), wherein the base (7) has a first surface (7 ₀ ), from which the

Discharge path (5) protrudes and a second (7 _U ), the first (70) opposite surface from which protrudes a male part (9) or in which a female connector protrudes;

• an adapter (13), at one base

(13 _u ) a connection (15) for an electrical network is attached to the other base (13 ₀ ) has a female connector (17) for the plug part (9) of the discharge lamp (13) or a plug for the socket of the discharge lamp is mounted .

characterized in that the outer surface of the adapter (13) spans a cylindrical surface with an adapter external thread (19), and a

Metallic hollow cylinder (21) with

Internal thread (23) is provided, that the internal thread (23) with the adapter external thread (19) can be screwed and the cap hollow cylinder (21) in the region of its one end (21 _G ) on the base (7) is supported. Arrangement according to claim 1, characterized in that the cap hollow cylinder (21) in the region of its one end (21 _Q ) has a collar (25) which is supported on the first surface (7 ₀ ) of the base (7).

Arrangement according to one of claims 1 or 2, characterized in that the second surface (7 _U ) of the

Base (7) and / or the other base surface (13 ₀ ) of the adapter (13) is / are formed so that when clamping of the base (7) and adapter (13) by means of

An annular hollow cylinder (21) an air gap (28) between at least areas of these surfaces (7 _U , 13 ₀ ) is formed, that preferably the other base surface (13 _D ) and the second surface are at least approximately planar and on at least one of these surfaces (13 _Q ) Abstandshalte- projections (27) are present.

Arrangement according to one of claims 1 to 4, characterized in that in a portion of the

Überwurfhohlzylinder (21) azimuthally distributed slots (29) are incorporated, preferably in one

Section, the socket (7) and adapter (13) bridged.

Arrangement according to claim 5, characterized in that in areas of the slots (29) between the

External surface of the base (7) and / or the adapter

(13) and the inner surface of the hollow collar cylinder

(21) air spaces (28) are present.

6. Arrangement according to one of claims 1 to 5, characterized in that at least the outer surface (21a) of the hollow cap cylinder (21) is black and

preferably surface-enlarged, further

preferably roughened.

7. Arrangement according to one of claims 1 to 6, characterized in that the Einkragung (25) is circumferential.

8. Arrangement according to one of claims 1 to 7, characterized in that the capping hollow cylinder (21) one of a part of the hollow cap cylinder with the

Internal thread dismountable fitting part (25a) and the Überwurfhohlzylinder (21) via this fitting part (25a) on the base (7) is supported.

9. Arrangement according to claim 8, characterized

in that the fitting part (25a) forms a peripheral frame.

10. Arrangement according to one of claims 1 to 9, characterized in that the hollow transfer cylinder is formed on its outer surface as a heat sink with projecting flanks.

11. Arrangement according to one of claims 1 to 10, characterized in that a preferably annular heat sink on the outer surface of the

Cover hollow cylinder is mounted interchangeable.

12. Arrangement according to claim 10 or 11, characterized in that the cooling body can be positioned axially along the hollow cap cylinder at different positions.

13. Arrangement according to one of claims 11 or 12, characterized in that several different

Heat sinks are provided as needed

Adjustment of heat dissipation from the hollow cylinder to the environment.