EP0446423B1 - Leuchte - Google Patents

Leuchte Download PDF

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Publication number
EP0446423B1
EP0446423B1 EP90121178A EP90121178A EP0446423B1 EP 0446423 B1 EP0446423 B1 EP 0446423B1 EP 90121178 A EP90121178 A EP 90121178A EP 90121178 A EP90121178 A EP 90121178A EP 0446423 B1 EP0446423 B1 EP 0446423B1
Authority
EP
European Patent Office
Prior art keywords
reflector
lamp
housing
cold light
light source
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.)
Expired - Lifetime
Application number
EP90121178A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0446423A1 (de
Inventor
Tetsuhiro Kano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nafa Light Kurt Maurer
Original Assignee
Nafa Light Kurt Maurer
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nafa Light Kurt Maurer filed Critical Nafa Light Kurt Maurer
Publication of EP0446423A1 publication Critical patent/EP0446423A1/de
Application granted granted Critical
Publication of EP0446423B1 publication Critical patent/EP0446423B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation
    • 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
    • F21V29/15—Thermal insulation
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • 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
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material

Definitions

  • the invention relates to a lamp with the features of the preamble of patent claim 1.
  • Such a lamp is known from FR-A-1 454 845.
  • a housing described with an upper wall, a bottom, side walls and a rear wall.
  • the lamp has a front opening.
  • a light source is provided with an elongated filament.
  • Another reflector is arranged behind the reflector of the light source and reflects infrared radiation from the light source to the housing. No opening for the passage of air is arranged between the infrared reflector and the housing wall. Rather, the infrared reflector is connected directly to the housing. As a result, ventilation and cooling of the lamp is only possible to a very limited extent.
  • Cold light reflectors known as such reflect light in the visible region of the electromagnetic spectrum, in particular at higher wavelengths, but allow infrared radiation to pass through. Such cold light reflectors are used in luminaires for technical and aesthetic reasons. A cold light reflector generates luminaire radiation from which infrared (and possibly also red) radiation components have been removed. This creates a certain aesthetic effect. Technically, the use of cold light reflectors has the effect that the radiation generated by the lamp does not cause undesired heating of the illuminated object due to the lack of infrared components.
  • incandescent lamps such as halogen incandescent lamps
  • infrared radiation Plant's emitter
  • a luminaire equipped with a cold light reflector only reflects visible ones Radiation forward in the direction of radiation of the luminaire, while infrared rays are transmitted to the rear by the cold light reflector.
  • the cold light reflector is installed in a housing, the infrared rays are emitted into the housing. Problems arise in the housing due to undesirable heat development.
  • the temperature at the neck of the incandescent lamp should remain below a predetermined limit. If the temperature exceeds certain limit values, the luminaire only has a short lifespan. For example, a limit value of 350 ° C applies to an incandescent lamp with an average lifespan of 2000 hours.
  • the use of a cold light reflector in a luminaire can lead to an increase in the temperatures in the housing of the luminaire, since infrared rays pass through the cold light reflector to the rear.
  • the problem of excessive heating inside the housing arises in particular when the incandescent lamp has a power consumption of more than 50 W.
  • the problem of heat development is particularly critical when the incandescent lamp is used in a hanging position (vertical). In this case, the neck is directly above the light bulb.
  • a cold light reflector not only lets the infrared rays through, but also a visible part of the electromagnetic spectrum (especially in the red range). This light is emitted to the outside through the openings mentioned and has a disruptive effect. The appearance of the lamp is also not very appealing due to the openings.
  • the object of the invention is to improve a lamp of the type mentioned in such a way that in the interior of the lamp housing and in particular at the so-called pinching point of the incandescent lamp there is a relatively low temperature, the lamp should also be aesthetically pleasing overall .
  • the socket of the light source is attached to the further reflector. Since the further reflector is only effective inside the luminaire housing, i.e. radiation reflected by it does not come out of the housing of the lamp, it can also be referred to as an "internal reflector".
  • the lamp according to the invention does not require any slots or holes in the housing wall.
  • the further reflector (inner reflector) is in heat-conducting connection with the housing wall.
  • This heat-conducting connection is preferably realized by means of one or more webs which connect the inner reflector to the housing wall in a heat-conducting manner and at the same time support it.
  • the light source or a part connected to it projects freely through a central opening in the cold light reflector. This creates a further flow path for air, which causes heat to be dissipated.
  • one or more openings or a circumferential free space is provided between the further reflector and the housing wall, through which air can pass.
  • the housing is provided with openings at the front and rear, which are preferably in the edge region of the lamp, i.e. are arranged near the cylindrical housing outer wall, so that air outside the cold light reflector can enter the interior of the housing near the outer housing wall, sweep past the housing wall and then exit from the interior of the housing in the rear region of the lamp.
  • the reflection surface of the further reflector (inner reflector) has an angle of inclination with respect to the axis of the luminaire that is less than 85 °.
  • the lamp 10 shown in the figures has a housing 12 with a housing wall 14.
  • the front of the lamp 10 is provided with the reference number 16, i.e. the direction of radiation of the lamp 10 points in the direction of the arrow S. This results in the terms “front” and “rear” used in the claims.
  • a cold light reflector 18 is fastened in the housing 12.
  • the cold light reflector is known as such and reflects light in the visible region of the electromagnetic spectrum, while infrared radiation (and possibly also red components of the radiation) are let through by the cold light reflector 18.
  • the infrared rays are indicated in FIG. 1 by dashed lines and identified by the reference symbol R.
  • a light source 20 with a filament 22 and a glass bulb 24 is arranged such that the filament 22 is positioned approximately at the focal point of the cold light reflector 18.
  • the light source 20 has a tapered neck 26 which can be fastened to a socket 30 by means of two plugs 28.
  • the two plugs 28 are pushed into holes 38 according to FIG. 1.
  • a further reflector 32 is arranged behind the cold light reflector 18.
  • the term "behind” refers to the direction of radiation S of the lamp, which points forward.
  • the further reflector 32 is described in more detail below.
  • the holder 30 is attached to it, so that the light source 20 and in particular its tapered neck 26 is not in contact with the cold light reflector 18 or another component of the lamp.
  • the reflector 32 is mechanically and thermally conductively connected to the housing wall 14 via two diametrically opposite webs 34.
  • an opening 36 which is rotationally symmetrical with respect to the optical axis A of the lamp 10, is formed in the neck of the cold light reflector 18, through which the neck 26 of the light source 20 projects in the center.
  • the reflection surface 40 of the infrared reflector 32 is inclined with respect to the optical axis A of the lamp in such a way that infrared radiation R incident with high efficiency is directed to the inner surface 14 'of the housing wall 14.
  • the infrared radiation generated by the light source 20 is thus largely introduced into the housing wall 14, which thus absorbs the majority of the heat generated by infrared radiation. This heat is dissipated by convection.
  • an opening 42 (which is only interrupted by the webs 34) is provided between the infrared reflector 32 and the housing wall 14, essentially around the entire circumference of the lamp.
  • a plurality of openings 44 are also provided on the front 16 of the lamp 10 adjacent to the housing wall 14 in the front wall, so that air can enter the interior of the housing in the direction of arrows P 1 and flows past the housing wall 14 near the inside 14 ' to continue flowing through the openings 42 to the rear.
  • Corresponding openings are provided in the rear section of the lamp (ie at the end of the lamp opposite the radiation direction S according to FIG. 1, which is not shown in detail in the figure), so that the heated air emerges from the housing 12 in the direction of the arrows P 1 can. Due to the shape of the reflector 32 shown in more detail in FIG. 1, the draft is conveyed through the housing 12.
  • the infrared reflector 32 acts not only as a mechanical socket for the light source 20, but also as a cooling device for the so-called pinching point of the light source 20.
  • the temperature in the critical neck region of the light source remains at relatively low values, although the side walls of the lamp 10 have no openings.
  • the infrared reflector 32 is shaped such that the portions of the infrared radiation reflected on it do not return to the light source, but are essentially directed onto the housing wall 14 of the lamp. Overall, the light source is not heated unnecessarily.
  • relatively cool air causes an effective cooling in the critical area of the neck 26 of the light source 20 when passing through the opening 36, which acts like a nozzle at this point due to the reduced opening cross section.
  • the warm air rises in the direction of the arrows P 2 over the reflection surface 40 and passes through the openings 42 to the side of the infrared reflector 32.
  • the infrared reflector 32 absorbs only a small part of the thermal energy and also dissipates it directly to the housing wall 14 via the webs 34, which have good heat-conducting properties.
  • the housing wall 14 is cooled not only by heat being given off to the outside air, but in particular also by the air flow flowing along the wall in the direction of the arrows P 1 and P 2.
  • the infrared reflector 32 Since the infrared reflector 32 remains relatively cold, as described, there is a considerable temperature gradient from the light source 20 to the infrared reflector 32 the light source 20 also dissipates heat with high efficiency into the infrared reflector 32, which in turn dissipates this heat via the bow-shaped webs 34 into the housing wall 14, which, as described, is cooled in particular by convection.
  • a transformer (not shown) can be installed in the lamp. This is arranged behind the infrared reflector 32 and can in particular be attached to the webs 34.
  • the infrared reflector 32 is dimensioned so large that the transformer cannot be seen from below (according to FIG. 1), or only to a small extent, even when the cold light reflector 18 is removed. As a result, the infrared rays cannot reach the transformer and the heated air flows through the openings 42 past the transformer without being able to heat it up disadvantageously.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Lasers (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP90121178A 1990-03-14 1990-11-06 Leuchte Expired - Lifetime EP0446423B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008124A DE4008124A1 (de) 1990-03-14 1990-03-14 Leuchte
DE4008124 1990-03-14

Publications (2)

Publication Number Publication Date
EP0446423A1 EP0446423A1 (de) 1991-09-18
EP0446423B1 true EP0446423B1 (de) 1994-07-27

Family

ID=6402169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121178A Expired - Lifetime EP0446423B1 (de) 1990-03-14 1990-11-06 Leuchte

Country Status (6)

Country Link
US (1) US5138541A (da)
EP (1) EP0446423B1 (da)
AT (1) ATE109267T1 (da)
DE (2) DE4008124A1 (da)
DK (1) DK0446423T3 (da)
ES (1) ES2057330T3 (da)

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DE4334882A1 (de) * 1993-10-08 1995-06-29 Abke Hermann Elektro Kg Möbeleinbauleuchte
US5434765A (en) * 1994-03-10 1995-07-18 Holophane Corporation Luminaire assembly
DE4434124A1 (de) * 1994-09-23 1996-03-28 Walter Holzer Reflektor für Leuchtstofflampen
US5626416A (en) * 1994-11-29 1997-05-06 Romano; Richard J. Lamp module apparatus
US5515254A (en) * 1995-03-07 1996-05-07 High End Systems, Inc. Automated color mixing wash luminaire
DE29509375U1 (de) * 1995-06-08 1995-08-24 Clausen, Rüdiger, 33649 Bielefeld Unterwasserleuchte mit Wärmeableitmantel
DE19533849C2 (de) * 1995-09-13 2000-11-09 Hoffbauer Herner Glas Leuchte
US5947592A (en) * 1996-06-19 1999-09-07 Mikohn Gaming Corporation Incandescent visual display system
US6095668A (en) * 1996-06-19 2000-08-01 Radiant Imaging, Inc. Incandescent visual display system having a shaped reflector
US5873650A (en) * 1996-11-19 1999-02-23 Luk; John F. Modular heat sink adapter for lamp bases
JPH10171362A (ja) * 1996-12-06 1998-06-26 Hitachi Ltd 液晶プロジェクタ
GB2335027B (en) * 1998-03-02 2001-09-26 Pag Ltd Lamp assembly
US6604845B2 (en) 2001-05-15 2003-08-12 General Electric Company Display lamp with optically curved heat shield
US6511209B1 (en) 2001-10-02 2003-01-28 Albert C. L. Chiang Lighting fixture
DE20202558U1 (de) * 2002-02-19 2003-07-03 Zumtobel Staff GmbH & Co. KG, 32657 Lemgo Konvektionsreflektor
EP2484962B1 (en) * 2003-05-05 2019-07-03 GE Lighting Solutions, LLC Led-based light bulb
US7654709B2 (en) * 2007-03-30 2010-02-02 Sportlite, Inc. Compact fluorescent lamp high bay luminaire
US7798684B2 (en) * 2007-04-06 2010-09-21 Genlyte Thomas Group Llc Luminaire system with thermal chimney effect
US7972036B1 (en) 2008-04-30 2011-07-05 Genlyte Thomas Group Llc Modular bollard luminaire louver
US7985004B1 (en) 2008-04-30 2011-07-26 Genlyte Thomas Group Llc Luminaire
US8231243B1 (en) 2008-08-19 2012-07-31 Philips Koninklijke Electronics N.V. Vertical luminaire
US8070328B1 (en) 2009-01-13 2011-12-06 Koninkliljke Philips Electronics N.V. LED downlight
US8197091B1 (en) 2009-05-15 2012-06-12 Koninklijke Philips Electronics N.V. LED unit for installation in a post-top luminaire
US8123378B1 (en) 2009-05-15 2012-02-28 Koninklijke Philips Electronics N.V. Heatsink for cooling at least one LED
US9713211B2 (en) 2009-09-24 2017-07-18 Cree, Inc. Solid state lighting apparatus with controllable bypass circuits and methods of operation thereof
US10264637B2 (en) 2009-09-24 2019-04-16 Cree, Inc. Solid state lighting apparatus with compensation bypass circuits and methods of operation thereof
US8901845B2 (en) 2009-09-24 2014-12-02 Cree, Inc. Temperature responsive control for lighting apparatus including light emitting devices providing different chromaticities and related methods
US9285103B2 (en) 2009-09-25 2016-03-15 Cree, Inc. Light engines for lighting devices
US8602579B2 (en) 2009-09-25 2013-12-10 Cree, Inc. Lighting devices including thermally conductive housings and related structures
US8777449B2 (en) 2009-09-25 2014-07-15 Cree, Inc. Lighting devices comprising solid state light emitters
US9068719B2 (en) 2009-09-25 2015-06-30 Cree, Inc. Light engines for lighting devices
US8506127B2 (en) * 2009-12-11 2013-08-13 Koninklijke Philips N.V. Lens frame with a LED support surface and heat dissipating structure
US8476836B2 (en) 2010-05-07 2013-07-02 Cree, Inc. AC driven solid state lighting apparatus with LED string including switched segments
CN102588756B (zh) * 2011-01-13 2014-05-07 光宝电子(广州)有限公司 灯具装置
US8585238B2 (en) 2011-05-13 2013-11-19 Lsi Industries, Inc. Dual zone lighting apparatus
USD657087S1 (en) 2011-05-13 2012-04-03 Lsi Industries, Inc. Lighting
US9839083B2 (en) 2011-06-03 2017-12-05 Cree, Inc. Solid state lighting apparatus and circuits including LED segments configured for targeted spectral power distribution and methods of operating the same
US8742671B2 (en) 2011-07-28 2014-06-03 Cree, Inc. Solid state lighting apparatus and methods using integrated driver circuitry
CN104728638A (zh) * 2015-03-23 2015-06-24 安徽兆利光电科技有限公司 一种带有恒温装置的led灯
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Also Published As

Publication number Publication date
DK0446423T3 (da) 1994-10-31
DE59006621D1 (de) 1994-09-01
US5138541A (en) 1992-08-11
ATE109267T1 (de) 1994-08-15
ES2057330T3 (es) 1994-10-16
DE4008124A1 (de) 1991-09-19
EP0446423A1 (de) 1991-09-18

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