EP2318756A1 - Elektrische schaltungsanordnung - Google Patents
Elektrische schaltungsanordnungInfo
- Publication number
- EP2318756A1 EP2318756A1 EP09777475A EP09777475A EP2318756A1 EP 2318756 A1 EP2318756 A1 EP 2318756A1 EP 09777475 A EP09777475 A EP 09777475A EP 09777475 A EP09777475 A EP 09777475A EP 2318756 A1 EP2318756 A1 EP 2318756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit arrangement
- electrical circuit
- housing
- arrangement according
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/12—Flameproof or explosion-proof arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to an electrical circuit arrangement, in particular electrical signal circuitry, preferably signal light, for use in potentially explosive atmospheres, with at least one arranged on a printed circuit board made of a thermally conductive material electrical component, in particular bulbs, and with a standing in thermal contact with the circuit board cooling device , -
- the addressed and arranged on the circuit board bulbs are usually one or more LEDs.
- Signal lights are commonly used to generate one or more optical signals that serve to indicate any hazards, peculiarities, etc.
- signal lights are used for reporting and warning, for example with regard to faults on machines.
- Signal lights but also escape routes can show as well or under certain circumstances indicate advertising space.
- acoustic signaling devices which are also to be qualified as electrical signal circuitry in the above sense.
- the aforementioned problem therefore generally applies to all housings of signal lights because, owing to the usually required high luminous intensity of the luminous means, an increased amount of heat loss must often be expected. This heat loss can lead to an increased temperature in the interior of the housing relative to the ambient temperature. The increased temperature inside the housing makes the use of the signal light in the example case in potentially explosive areas problematic. Because there is a risk that partial areas of the housing heat up significantly higher than other areas. As a result, so-called "hot spots" are observed on the surface of the device, which can be sources of ignition for the surrounding atmosphere in potentially explosive atmospheres.
- the invention aims to provide a total remedy.
- the technical problem underlying the invention is to further develop such an electrical circuit arrangement that design limitations are no longer observed and a cost-effective embodiment is present.
- the invention proposes in a generic electrical circuit arrangement that the cooling device is formed at least in two parts with heat sink and at least one heat pipe, wherein the heat pipe thermally connects the circuit board with the heatsink remote therefrom.
- the heat pipe thermally connects the circuit board with the heatsink remote therefrom.
- At least one heat pipe or a so-called “heat pipe” is used, which respectively thermally connects the printed circuit board with the electrical component arranged thereon to the heat sink.
- the heat sink acts as a heat sink and any heat loss of the electrical component is on the thermally conductive Material manufactured circuit board and the heat pipe finally forwarded to the hereby heat-conducting connected heat sink and distributed there usually distributed over a relatively large area to the ambient air.
- a heat exchanger which usually provides a high heat flux density available by using heat of vaporization of a heat transfer medium received in the heat pipe.
- the heat transfer medium or working medium may be water, which is received in the interior of the mostly hermetically encapsulated heat pipes.
- the heat transfer medium or working medium begins to evaporate.
- the resulting vapor flows in the direction of the heat sink or the heat sink, where it condenses because of its lower temperature.
- the previously recorded heat heat loss of the arranged on the circuit board electrical component
- the now (again) liquid working medium usually returns by gravity or in the case of a heat pipe by capillary force back to the place of heat input or distributed in the interior of the heat pipe.
- heat pipes or heat pipes are able to work in weightlessness and in particular regardless of the installation position.
- the capillaries are formed in a kind of wick inside the heat pipe, whereas the space surrounding the wick and / or inside is used for steam guidance.
- the required working fluid is introduced into the heat pipe, it is usually necessary to mechanically evacuate the heat pipe. Since in the present case the temperature range between about 0 0 C and 100 0 C is primarily covered, water is suitable as a heat transfer medium or working medium.
- copper is usually used for the production of the heat pipe or the heat pipe, since this can be easily shaped and also has a high thermal conductivity.
- Such heat pipes or heatpipes are commercially available today in various lengths.
- the heat sink ultimately representing heat sink is also formed at the same time as a mounting flange for the described electrical circuit arrangement as a whole. This provides a dual benefit as it were.
- a housing receiving the electrical circuitry is usually made of plastic, is therefore hardly suitable for immediate attachment to a wall, a ceiling a housing, etc.
- a mounting flange heat sink is used, which provides the necessary mechanical Stability for the mounting of the electrical circuit arrangement provides.
- the mounting flange or heat sink is equipped according to an advantageous embodiment with additional cooling fins, which at the same time increase its stability, but in any case increase the surface and thus enhance the heat transfer to the environment.
- the heat sink may be equipped with a cold source, which may be an example of a Peltier element. This additional source of cold is usually used when the heat dissipation through the heat sink or the heat sink in the application is not sufficient.
- the printed circuit board made of a thermally conductive material is usually carried by a housing insert, in turn, with the already addressed housing is mechanically connected.
- the housing is made in the present case of plastic and is usually filled with a potting compound to provide the required explosion-proof design available.
- the potting compound prevents exposed contacts from causing an ignitable mixture to explode or from sparking.
- the potting compound is, as usual, an insulating plastic, which is filled into the housing usually in overhead division in (tough) liquid state and then cured.
- the housing is regularly formed at least in two parts with an opaque base body and a transparent signal hood.
- the potting compound in the area of the signal hood is designed to be regularly transparent, whereas otherwise a cloudy or opaque potting compound is used.
- the signal hood and the main body are usually united together only by a plug connection.
- the potting compound is filled into the housing in the overhead position and cured, it ensures that the two housing parts (main body and signal hood) are captively coupled together.
- To further stability also contributes to the fact that the housing insert carrying the circuit board is regularly connected to the housing and of course then with the cured potting compound.
- the invention is also a structural unit, which is composed of an electrical circuit arrangement of the type described and is additionally equipped with an adapter.
- This adapter ensures or ensures that via a common supply line and the adapter not only an electrical circuit, but for example, two or even more can be supplied. So it is conceivable to combine a signal light with a signal speaker or two signal lights each other respectively two signal speakers. That depends on the importance of the attention signal in the warning area to be equipped.
- an electrical circuit arrangement and a structural unit of the electrical circuit arrangement and the adapter are made available, which first of all by the almost unlimited variety of design of the housing and in particular the arrangement of the light source or of the printed circuit board carried by the electrical component and the Distinguish the associated cooling device.
- This heat sink is advantageously arranged in a housing recess, thus in thermal contact with the environment. This also applies and in particular for the case that the housing is made entirely or predominantly of plastic. Because the heat sink also represents the mounting flange for the circuit as a whole, a practical dual benefit is provided.
- a base can be used as an additional heat sink to which the heat sink or mounting flange is fixed.
- this base area or base may be a (metal) machine housing or the like.
- For an additional increase in surface area of the heat sink or mounting flange may provide additional cooling fins or an optional source of cold.
- the described electrical circuit arrangement of the shape of the housing can be arbitrarily designed, especially since the housing is usually designed as a low-priced plastic injection molded part. Nevertheless, the required explosion-proof equipment is provided, which not only ensures the reliable dissipation of the resulting heat loss inside, but also the fact that the interior of the housing is filled with a potting compound.
- This potting compound also has a dual function. It not only ensures that electrical cables or the electrical component accommodated on the printed circuit board are hermetically sealed, but at the same time ensures that the two housing parts (main body and signal hood) are perfectly connected to each other, without additional fastening means at this point would be required.
- main benefits are the main benefits.
- Fig. 3 shows a structural unit of a modified electrical circuit arrangement and an associated adapter.
- an electrical circuit arrangement is shown, which is used for use in potentially explosive areas.
- the electrical circuit arrangement is a signal circuit arrangement, in the present case a signal light.
- the basic structure of the circuit arrangement or signal light includes one or more electrical components 1, each of which is LED 1. These components 1 and LED's 1 are received on a printed circuit board 2 made of a thermally conductive material.
- the circuit board 2 is made in the embodiment of a metal, in particular aluminum.
- the LEDs 1 are SMD LEDs L
- the LEDs or lighting means 1 are arranged in a circle in comparison to a central axis A of a housing 3. Opposite this axis A, the housing 3 is rotationally symmetrical. In this way, the light emitted by the LEDs or light sources 1 is emitted in all spatial directions, so that an all-round light emission is ensured.
- the respective printed circuit board 2 is supported by a housing insert 4, which in turn is mechanically connected to the housing 3.
- the housing insert 4 is composed of an insert foot 4a and an insert head 4b, wherein the insert head 4b is equipped in cross-section as a polygon with side surfaces 4c, which each carry a printed circuit board 2.
- the respective printed circuit board 2 is connected to the insert head 4b by means of or by resorting to a plurality of screws 5.
- this cooling device 6, 7 is composed of a heat pipe 6 and a heat sink 7.
- the heat pipe 6 thermally connects the respective printed circuit board 2 to the cooling body 7 arranged spatially remote therefrom.
- the heat pipe 6 is centrally accommodated in the operating head 4b of the housing insert 4 in the exemplary embodiment.
- the insert head 4b in question is solid and made of metal (aluminum) and equipped with a hollow bore 8 which receives one end of the heat pipe 6 in its interior. About this hollow bore 8 takes place at the beginning already described heat input into the heat pipe 6.
- the heat sink 7 is equipped with a hollow bore 9, wherein the hollow bore 9 in conjunction with the heat sink 7 is the previously described heat sink. Consequently flows from the LEDs 1 produced heat loss via the insert head 4b, the heat pipe 6 finally to the heat sink 7, which acts as a heat sink.
- the heat pipe 6 is equipped as a copper pipe with a heat transfer medium, in particular water, enclosed in an encapsulation, the heat pipe 6 can be easily bent and easily adapted to the topological conditions in the interior of the housing 3. Any heat loss of the LEDs 1 is received via the associated circuit board 2, because the electrical component or the LED 1 is mounted in the example on the circuit board 2 with the interposition of a thermal paste or the like. From the circuit board 2, the heat is transmitted to the insert head 4b of the housing insert 4, which is also made of a thermally conductive material (metal). With the insert head 4b is one end of the heat pipe 6 in thermal contact.
- a thermally conductive material metal
- the resulting heat loss is now converted into latent heat and transported to the heat sink in the form of the heat sink 7. Since the heat sink 7 is at the same time designed as a mounting flange 7 for the circuit arrangement or the housing 3 as a whole, the heat thus transported is distributed over a large area. This applies even more in the event that the heat sink 7 is equipped with supplementary and not explicitly shown cooling fins. Also, an additional source of cold in the form of a Peltier element can be used here, but this is also not shown.
- the heat sink 7 is placed in a housing recess 10. As a result, the heat sink 7 is directly in thermal contact with the ambient atmosphere. This is of particular importance, as the housing 3 is made of plastic in the exemplary embodiment, thus has a poor thermal conductivity. In any case, the heat loss from the LED's 1 ultimately over that in the housing opening 10th placed heat sink 7 delivered to the ambient air respectively ambient atmosphere.
- the housing 3 is formed essentially in two parts and cylindrically with an opaque main body 3a and a transparent signal hood 3b.
- the transparent signal hood 3b As a result of the transparent signal hood 3b, the light emitted by the LEDs 1 light can be radiated all around easily and provides the desired signal effect.
- the circumstance contributes to the fact that the housing 3 is filled with a potting compound 11a, 11b in the interior.
- This casting compound 11a, 11b is filled in a viscous state in the overhead division of the housing 3 and, of course, when the housing insert 4 is mounted, LED's 1 mounted thereon and likewise realized cooling device 6, 7.
- the opaque main body 3a and the transparent signal cap 3b have been coupled to each other via respective snap-in connections 12 or enter into a mutual plug connection.
- the potting compound 11a, 11b hardens, the transparent signal cap 3b and the base body 3a are captively coupled together.
- the potting compound 11 a is a transparent potting compound which fills the interior of the housing 3 in the region of the signal hood 3 b. Below the filled with the aid of the transparent potting compound 11 a space is the cloudy or opaque further potting compound 11 b. Both potting compounds 11a, 11b are successively filled into the housing 3, first the transparent potting compound 11a and then the opaque potting compound 11b.
- Fig. 3 shows a structural unit of the already described electrical circuitry respectively the signal light and an adapter 13.
- This adapter 13 is equipped with a flange 14, to which a further signal light or a signal speaker can be arranged.
- a further signal light or a signal speaker can be arranged.
- the adapter 13 are both electrical Circuit arrangements supplied together with the required electrical energy. It can be seen that the two electrical circuit arrangements are arranged at right angles to each other in the embodiment, which of course is not a mandatory feature.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Structure Of Printed Boards (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202008010175U DE202008010175U1 (de) | 2008-07-30 | 2008-07-30 | Elektrische Schaltungsanordnung |
PCT/EP2009/005442 WO2010012443A1 (de) | 2008-07-30 | 2009-07-28 | Elektrische schaltungsanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2318756A1 true EP2318756A1 (de) | 2011-05-11 |
EP2318756B1 EP2318756B1 (de) | 2011-12-21 |
Family
ID=39942546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09777475A Not-in-force EP2318756B1 (de) | 2008-07-30 | 2009-07-28 | Elektrische schaltungsanordnung |
Country Status (6)
Country | Link |
---|---|
US (1) | US8740419B2 (de) |
EP (1) | EP2318756B1 (de) |
CN (1) | CN102112808A (de) |
AT (1) | ATE538345T1 (de) |
DE (1) | DE202008010175U1 (de) |
WO (1) | WO2010012443A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008017960U1 (de) * | 2008-12-17 | 2011-02-10 | Poly-Tech Service Gmbh | LED-basiertes Beleuchtungssystem |
DE102010017460B4 (de) * | 2010-06-18 | 2013-05-08 | R. Stahl Schaltgeräte GmbH | Explosionsgeschütztes Leuchtmittel |
EP2416064B1 (de) * | 2010-08-06 | 2012-12-19 | FHF Funke + Huster Fernsig GmbH | Elektrische Signal-Schaltungsanordnung, vorzugsweise elektrische Signal-Leuchtenanordnung |
EP2672166B1 (de) * | 2010-11-04 | 2019-10-30 | Panasonic Intellectual Property Management Co., Ltd. | Glühlampenförmige Lampe und Beleuchtungsvorrichtung |
DE102011005701A1 (de) * | 2011-03-17 | 2012-09-20 | Osram Ag | Beleuchtungseinrichtung und Fahrzeugscheinwerfer mit Beleuchtungseinrichtung |
DE102011017162A1 (de) | 2011-04-15 | 2012-10-18 | Cooper Crouse-Hinds Gmbh | Explosionsgeschütztes LED-Modul |
WO2015024846A1 (en) * | 2013-08-22 | 2015-02-26 | Koninklijke Philips N.V. | Lighting device |
EP4202296A1 (de) | 2021-12-22 | 2023-06-28 | Richter Lighting Technologies GmbH | Kühlvorrichtung für eine wärmequelle und wärmequellenanordnung |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5256436A (en) | 1975-10-31 | 1977-05-09 | Tokico Ltd | Manufacturing process of heat-pipe unit |
EP0202335B1 (de) * | 1984-11-15 | 1989-10-25 | Japan Traffic Management Technology Association | Signallichteinheit mit wärmeabfuhr |
US4871251A (en) | 1987-04-27 | 1989-10-03 | Preikschat F K | Apparatus and method for particle analysis |
US6000819A (en) * | 1997-03-26 | 1999-12-14 | Woodhead Industries, Inc. | Wide area light fixture for hazardous locations |
US6866394B1 (en) * | 1999-10-04 | 2005-03-15 | Nicholas D. Hutchins | Modules for elongated lighting system |
DE20204003U1 (de) * | 2002-03-13 | 2003-07-17 | Bartec Componenten und Systeme GmbH, 97980 Bad Mergentheim | Meldeleuchte |
US7258464B2 (en) * | 2002-12-18 | 2007-08-21 | General Electric Company | Integral ballast lamp thermal management method and apparatus |
NL1029583C2 (nl) | 2005-07-21 | 2007-01-25 | Imt B V | Explosieveilig armatuur. |
WO2007067932A2 (en) | 2005-12-06 | 2007-06-14 | Dialight Corporation | Method and apparatus for providing an led light for use in hazardous locations |
WO2007131123A2 (en) * | 2006-05-03 | 2007-11-15 | Dialight Corporation | Embedded led light source |
US7824075B2 (en) * | 2006-06-08 | 2010-11-02 | Lighting Science Group Corporation | Method and apparatus for cooling a lightbulb |
US7604380B2 (en) | 2006-06-30 | 2009-10-20 | Dialight Corporation | Apparatus for using heat pipes in controlling temperature of an LED light unit |
TWI307750B (en) * | 2006-11-22 | 2009-03-21 | Neobulb Technologies Inc | Outdoor high power light-emitting diode illuminating equipment |
DE102006056236B4 (de) | 2006-11-27 | 2009-04-09 | Haschert, René | Gehäuse für Beleuchtungskörper sowie Leuchte, umfassend dieses Gehäuse, und deren Verwendung als Straßenlampe und Flutlichtvorrichtung |
US7581856B2 (en) * | 2007-04-11 | 2009-09-01 | Tamkang University | High power LED lighting assembly incorporated with a heat dissipation module with heat pipe |
CN101349412A (zh) * | 2007-07-18 | 2009-01-21 | 富准精密工业(深圳)有限公司 | 发光二极管灯具 |
US8317358B2 (en) * | 2007-09-25 | 2012-11-27 | Enertron, Inc. | Method and apparatus for providing an omni-directional lamp having a light emitting diode light engine |
US7755901B2 (en) * | 2008-01-08 | 2010-07-13 | Asia Vital Components Co., Ltd. | Heat dissipating structure for light emitting diodes |
US7682055B2 (en) * | 2008-08-01 | 2010-03-23 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | LED lamp |
-
2008
- 2008-07-30 DE DE202008010175U patent/DE202008010175U1/de not_active Expired - Lifetime
-
2009
- 2009-07-28 CN CN2009801300049A patent/CN102112808A/zh active Pending
- 2009-07-28 WO PCT/EP2009/005442 patent/WO2010012443A1/de active Application Filing
- 2009-07-28 AT AT09777475T patent/ATE538345T1/de active
- 2009-07-28 EP EP09777475A patent/EP2318756B1/de not_active Not-in-force
- 2009-07-28 US US13/054,148 patent/US8740419B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US8740419B2 (en) | 2014-06-03 |
WO2010012443A1 (de) | 2010-02-04 |
CN102112808A (zh) | 2011-06-29 |
US20110176317A1 (en) | 2011-07-21 |
DE202008010175U1 (de) | 2008-11-06 |
EP2318756B1 (de) | 2011-12-21 |
ATE538345T1 (de) | 2012-01-15 |
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