EP2137458A1 - Leuchte mit kühlung - Google Patents
Leuchte mit kühlungInfo
- Publication number
- EP2137458A1 EP2137458A1 EP08735062A EP08735062A EP2137458A1 EP 2137458 A1 EP2137458 A1 EP 2137458A1 EP 08735062 A EP08735062 A EP 08735062A EP 08735062 A EP08735062 A EP 08735062A EP 2137458 A1 EP2137458 A1 EP 2137458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- recessed ceiling
- light source
- luminaire
- housing
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 9
- 238000005086 pumping Methods 0.000 claims description 29
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 239000012528 membrane Substances 0.000 description 9
- 230000007704 transition Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
-
- 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
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
-
- 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
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/63—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air using electrically-powered vibrating means; using ionic wind
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- 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 present invention relates to a luminaire, in particular a recessed ceiling luminaire with a housing, a light source disposed within the housing and a device for generating a guided through the housing gas flow for cooling the light source.
- a light source of a luminaire heats up during operation of the luminaire, so that in general the problem of cooling the light source or the luminaire is given.
- the light source is a light-emitting diode (LED)
- the light flux produced by the LED will be smaller under normal conditions the warmer the LED is.
- the life of an LED is usually reduced if it is not cooled during operation.
- LEDs must be effectively cooled in order to operate at the best possible level of performance can.
- the invention is based on the object to provide a lamp whose light source can be effectively cooled, especially in the case that no free convection flow can form.
- a luminaire in particular a recessed ceiling luminaire, which has a housing, a light source arranged inside the housing, and a device for generating a gas flow guided through the housing for cooling the light source.
- the device comprises a pump.
- the gas stream may be, for example, an air stream.
- the luminaire can also be, for example, a recessed wall luminaire.
- said plane may be the ceiling plane, that is to say that plane which is defined by the underside of the ceiling which, when installed, surrounds the luminaire.
- the light source comprises at least one LED.
- the pump is a positive displacement pump, in particular a piston pump or a diaphragm pump.
- a positive displacement pump in particular a piston pump or a diaphragm pump.
- Compared to a fan, such pumps can be operated to perform slower movements. This has the advantage that a quieter operation is possible.
- such pumps generally have a longer life.
- a diaphragm pump is particularly advantageous because, in this case, seal problems between piston and cylinder can not occur in comparison with a piston pump.
- the pump comprises a pumping chamber and an outlet channel for the gas flow, wherein the outlet channel connects the pumping chamber with the space outside the luminaire.
- the term "pumping chamber” here refers to that space in the pump in which the compression of the gas takes place, which is caused by the movement of the displacement body of the pump, for example, the piston or the membrane.
- the exhaust passage may terminate at an exhaust port located in a wall of the housing of the lamp so that gas from the exhaust port may flow into the space outside the lamp.
- the outlet opening can be arranged in the above-mentioned plane, that is, for example, in the intended ceiling plane.
- the pump may comprise an inlet channel for the gas flow, which connects the outer space of the lamp with the pumping chamber.
- the inlet duct may begin at an inlet opening located in a wall of the housing of the luminaire so that gas from the space outside the luminaire can effectively flow into the pumping chamber.
- the inlet opening can be arranged in the above-mentioned plane, that is, for example, in the intended ceiling plane.
- valves for controlling the direction of the gas flow are arranged at the inlet channel and at the outlet channel.
- a particularly effective gas flow may be generated if the pump further comprises a second pumping chamber.
- the lamp has an electric motor for driving the pump, wherein preferably a device is provided, with which the rotational movement of the electric motor via a crank drive or an eccentric can be converted into a linear movement.
- the luminaire has a system for driving the pump, which comprises a magnetic coil and a submersible magnet.
- a system for driving the pump which comprises a magnetic coil and a submersible magnet.
- the coil can be operated with a low-frequency alternating voltage, preferably less than 20 Hz. This allows a particularly quiet operation.
- a break contact is provided, which preferably opens when the displacement body, so for example, the piston of the pump is in an extreme position.
- a piezoelectric actuator for example a bimorph, is provided for controlling the pump,
- a Stirling engine is provided for driving the pump.
- the light source may in this case be thermally connected to the "hot region" of the Stirling engine, thus allowing the heat generated by the light source to be used to drive the pump.
- the Stirling engine may also advantageously be a flat plate Stirling engine, the light source accordingly This form of Stirling engine already works with comparatively very small temperature differences
- FIG. 1 is a sketch of a lamp according to the invention with a driven by a Stirling engine diaphragm pump
- FIG. 2 shows a sketch of an embodiment with a piston pump
- FIG. 3 is a sketch of an embodiment with a diaphragm pump
- Fig. 6 is a sketch of a pump drive by means of a magnetic coil and a submersible magnet
- Fig. 7 is a sketch of an alternative channel guide.
- Fig. 1 shows a sketch of a lamp according to the invention.
- the luminaire may in particular be a recessed ceiling luminaire which is intended to be installed in a corresponding installation opening in a ceiling 4.
- the installation opening may, for example, be an opening which is closed at the top, so that there is generally the problem of cooling the luminaire.
- the lamp comprises a region which can be referred to as a heat sink 7 and in which a generally designated 3 pump is arranged, which is adapted to a gas flow - in the example shown, an air flow - to generate, which serves to cool the light source or the LEDs 2.
- the heat sink 7 extends at least partially above the light source 2.
- the gas flow is guided through the housing 1 or through the heat sink 7. With the help of the pump 3, therefore, an air flow can be generated which at least to a considerable extent removes the heat which is generated by the LEDs 2 during operation of the luminaire.
- the pump 3 is a diaphragm pump 3 'with a membrane 12.
- the diaphragm pump 3' further comprises a pumping chamber 5, the bottom of the membrane 12, laterally from the inner surface of a pumping cylinder 6 and top of a pump chamber ceiling 14 is limited.
- the membrane 12 moves in operation with a central region alternately up and down, as indicated by the double arrow 13 in Fig. 1 and acts in this way as a displacement of the pump 3 to the air located in the pump chamber 5.
- an inlet opening 11 is provided at the transition from the outer space AR in the housing 1, which is provided at the transition from the outer space AR in the housing 1, so that an inlet opening 11 is provided.
- the inlet opening 11 lies in a plane E, which extends horizontally and thus above the LEDs 2 through the housing 1 or the heat sink 7 when the lamp is in the proper position.
- the plane E can, for example - as sketched in FIG. 1 - coincide with that plane which is usually referred to as the ceiling plane DE, ie with the plane defined by the underside of the ceiling 4, which surrounds the luminaire in the installed state of the luminaire ,
- an outlet channel 8 which connects the interior of the pumping chamber 5 with the outer space AR, so that the gas or the air can flow from the pumping chamber 5 into the outer space AR.
- an outlet 10 is provided at the transition between the outlet channel 8 and the outer space AR.
- the pump 3 'further comprises a suction or inlet valve 21, which may be arranged for example at the transition between the inlet channel 9 and the pumping chamber 5 and allows air flow from the outer space AR into the pumping chamber 5, but blocks in the opposite direction ,
- a pressure or exhaust valve 20, which may be provided for example at the transition from the outlet channel 8 to the outer space AR, allows an air flow from the pumping chamber 5 in the outer space AR, but locks in the opposite direction.
- the heat sink 7 has a channel system formed from the inlet channel 9 and the outlet channel 8, which allows an air flow from the ceiling level DE upwards into the pumping chamber 5 on the one hand and from the pumping chamber 5 downwards via the outlet opening 10 into the outside space AR on the other hand allows.
- the arrangement is also suitable, for example, for a recessed wall luminaire, namely with a corresponding rotated by 90 ° orientation.
- an inventive lamp an effective air flow through a vertical plane from the interior of the lamp can be effected in the outer space.
- a Stirling engine for driving the diaphragm pump 3 ', in the form of a flat plate Stirling engine 30 with a lower flat plate or end plate 31 forming the "hot region" of the Stirling engine 30 and an upper one End plate 32, which forms the "cold area” of the Stirling engine 30.
- the light source or LEDs 2 are thermally connected to the end plate 31, which forms the hot region.
- the other end plate 32 is thermally connected to the heat sink 7.
- a cylindrical working chamber is formed, in which a porous working piston 33 of the Stirling engine 30 can move.
- the Stirling engine 30 draws its energy from the temperature difference of the two end plates 31, 32.
- the diaphragm 12 of the pump 3 is moved.
- the flow of air generated by the pump 3 cools the "cold" plate 32 of the Stirling engine 30 via the heat sink 7, thus maintaining the temperature difference not discussed in detail.
- a Stirling engine to drive the pump is advantageous because in this way the existing thermal energy in the system can be used to drive the pump.
- An external energy source for example in the form of electric current, is therefore not absolutely necessary here.
- a flat plate Stirling engine is particularly suitable because with this type of engine already a comparatively very small temperature difference to the drive is sufficient.
- a flat plate Stirling engine is relatively simple in construction and can be produced with relatively few components. Furthermore, it is possible to make the shape of the engine very flat, which is particularly advantageous for use in a lamp.
- a piston pump 3 is provided instead of a diaphragm pump 3 ', separately sketched in Fig. 3, as sketched in Fig. 2.
- a piston 15 acts as displacer on the pump chamber 5 The up and down movement of the piston 15 is indicated by a double arrow 16 in FIG.
- the pump is a piston pump 3 '', which is driven by a Stirling engine 30.
- Both diaphragm pumps and piston pumps are positive displacement pumps. Compared to a fan, a positive displacement pump can be operated so that it runs slower. This is advantageous because bearing noise is unavoidable due to the high speeds that typically occur during fan operation. A Positive displacement pump can therefore generally be operated quieter. In addition, the average life of a positive displacement pump is longer than that of a fan.
- valve flaps 27 can be formed which act as inlet and outlet valves.
- the membrane 12 and the valve technology can be realized in one part.
- the channel guide is arranged on the circumference of the pump cylinder 6.
- the inlet opening 11 and the outlet opening 12 it is generally advantageous if these two openings are clearly spaced, for example, substantially located on opposite areas on the underside of a recessed ceiling light to avoid heated air exiting the outlet opening quasi directly followed by the inlet opening to a considerable extent again.
- Pump may be provided, for example, an electric motor 22.
- the rotating movement of the electric motor 22 can be set, for example via a crank drive or an eccentric in a linear motion, which can then be used to drive the pump 3, so for example a diaphragm pump 3 'or a piston pump 3 ".
- the pump 3 also has a second pumping chamber 5 'which is connected to the inlet channel 9 via a second inlet valve 21' and to the outlet channel 8 via a second outlet valve 20 '
- a second pumping chamber 5 ' which is connected to the inlet channel 9 via a second inlet valve 21' and to the outlet channel 8 via a second outlet valve 20 '
- a corresponding two-chamber system can also be realized in the case of a piston pump.
- another possibility for driving the pump 3 is to generate the linear motion directly.
- a system with a magnetic coil 24 and a submersible magnet 26 may be provided for this purpose.
- the coil 24 is connected to the displacement of the pump 3, in the example shown so with the membrane 12.
- the solenoid 26 is firmly connected to the heat sink 7.
- the coil 24 moves in its longitudinal direction, in the example sketched in the vertical direction and thereby includes the heat sink 7 more or less deep. In this way, wear can be further reduced and further reduce noise during operation. In this case, it is particularly advantageous with regard to the noise development when the coil 24 is operated with a low-frequency alternating voltage, for example ⁇ 20 Hz.
- the pump - as outlined - again have two pumping chambers 5, 5 '.
- a variant with only one pumping chamber is possible.
- control of the pump also takes place directly, for example with a break contact, which opens when the displacement body, that is, for example, the piston is in an extreme position.
- a break contact which opens when the displacement body, that is, for example, the piston is in an extreme position.
- a return of the displacer may be provided in this case, for example, a spring.
- a bimetal 34 can serve as a further alternative for controlling the pump 3. It is also possible to use a piezoelectric actuator for this purpose, for example in the form of a bimorph.
- a luminaire which has a pump 3, wherein the pump can be in particular a diaphragm pump 3 'or a piston pump 3 "The pump can have one or two pumping chambers in both cases Examples of means that can be used for this are: Stirling engine, electric motor, system with coil solenoid, breaker contact, bimetal, piezoelectric actuator. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007019074A DE102007019074A1 (de) | 2007-04-23 | 2007-04-23 | Leuchte mit Kühlung |
| PCT/EP2008/002742 WO2008128635A1 (de) | 2007-04-23 | 2008-04-07 | Leuchte mit kühlung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2137458A1 true EP2137458A1 (de) | 2009-12-30 |
| EP2137458B1 EP2137458B1 (de) | 2013-02-27 |
Family
ID=38666867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08735062A Not-in-force EP2137458B1 (de) | 2007-04-23 | 2008-04-07 | Leuchte mit kühlung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2137458B1 (de) |
| DE (1) | DE102007019074A1 (de) |
| WO (1) | WO2008128635A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008044956B4 (de) | 2008-08-29 | 2012-03-29 | Osram Ag | Beleuchtungsvorrichtung zum Einbau in eine Platte |
| EP2480829B1 (de) * | 2009-09-23 | 2014-04-16 | Koninklijke Philips N.V. | Leuchtvorrichtung |
| AU2011204751A1 (en) * | 2010-01-11 | 2012-08-02 | Gerard Lighting Holdings Pty Ltd | Downlight |
| US8506105B2 (en) | 2010-08-25 | 2013-08-13 | Generla Electric Company | Thermal management systems for solid state lighting and other electronic systems |
| DE102010042599A1 (de) * | 2010-10-19 | 2012-04-19 | Osram Ag | Leuchtvorrichtung und Verfahren zum Kühlen einer Halbleiterlichtquelle |
| KR101227522B1 (ko) | 2011-05-25 | 2013-01-31 | 엘지전자 주식회사 | 조명 장치 |
| DE102011081369A1 (de) | 2011-08-23 | 2013-02-28 | Trilux Gmbh & Co. Kg | Leuchte, insbesondere LED-Leuchte mit passiver Kühlung |
| WO2013177797A1 (zh) * | 2012-06-01 | 2013-12-05 | 东莞华明灯具有限公司 | 一种灯具的散热装置 |
| RU2662691C2 (ru) | 2013-08-21 | 2018-07-26 | Филипс Лайтинг Холдинг Б.В. | Осветительное устройство и светильник |
| DE102019219635A1 (de) * | 2019-12-14 | 2021-06-17 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Pumpe |
| CN110906206B (zh) * | 2019-12-19 | 2021-10-22 | 德清欧尚照明科技有限公司 | 一种水下led景观灯结构 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR693696A (fr) * | 1930-04-11 | 1930-11-24 | Sperry Gyroscope Co Inc | Perfectionnements aux projecteurs de recherche |
| GB0114222D0 (en) * | 2001-06-12 | 2001-08-01 | Pulsar Light Of Cambridge Ltd | Lighting unit with improved cooling |
| DE10231258A1 (de) * | 2002-07-11 | 2004-01-22 | Philips Intellectual Property & Standards Gmbh | Entladungslampe mit Kühleinrichtung |
| JP2007514270A (ja) * | 2003-05-14 | 2007-05-31 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | ハイパワーランプの冷却プロセスを正確に制御する方法 |
| DE102004025640A1 (de) * | 2004-05-25 | 2005-12-22 | Hella Kgaa Hueck & Co. | Scheinwerfer mit am Leuchtmittel angeordnetem Wärmetauscher |
-
2007
- 2007-04-23 DE DE102007019074A patent/DE102007019074A1/de not_active Withdrawn
-
2008
- 2008-04-07 EP EP08735062A patent/EP2137458B1/de not_active Not-in-force
- 2008-04-07 WO PCT/EP2008/002742 patent/WO2008128635A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007019074A1 (de) | 2008-10-30 |
| EP2137458B1 (de) | 2013-02-27 |
| WO2008128635A1 (de) | 2008-10-30 |
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