EP0061527B1 - Pendelleuchte - Google Patents

Pendelleuchte Download PDF

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Publication number
EP0061527B1
EP0061527B1 EP81109267A EP81109267A EP0061527B1 EP 0061527 B1 EP0061527 B1 EP 0061527B1 EP 81109267 A EP81109267 A EP 81109267A EP 81109267 A EP81109267 A EP 81109267A EP 0061527 B1 EP0061527 B1 EP 0061527B1
Authority
EP
European Patent Office
Prior art keywords
lamp
light
mirror
mirrors
fitting
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
Application number
EP81109267A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0061527A1 (de
Inventor
Joachim Dipl.-Ing. Leibig
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT81109267T priority Critical patent/ATE11693T1/de
Publication of EP0061527A1 publication Critical patent/EP0061527A1/de
Application granted granted Critical
Publication of EP0061527B1 publication Critical patent/EP0061527B1/de
Expired legal-status Critical Current

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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
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
    • 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
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the invention relates to a pendant lamp for a rod-shaped lamp arranged horizontally during operation, according to the first part of claim 1, as shown in US-A-3 158 327.
  • a lamp is characterized by very good shielding, the shielding angle - measured against the horizontal - being equal to or greater than 30 ° to 40 ° and indicating the range in which the luminance of the lamp is below 200 cd per square meter.
  • the known luminaire has a poor operating efficiency, which can be attributed to several unfavorable properties: First, an upward-looking mirror is arranged in the lower light outlet opening for longitudinal shielding, which reflects a substantial part of the luminous flux of the lamp back onto it; at the same time, a wide angular range is shadowed under the lamp.
  • the ratio of the luminous fluxes emitted upwards and downwards and their light distribution curve are decisive for the lighting efficiency of a lighting system.
  • the maxima of the upward light distribution curve are too high, since the lamp is arranged too deep in the lamp and furthermore the upper mirrors radiate steeply upwards, that is to say not crosswise.
  • the invention has for its object to improve the operating efficiency of a pendant lamp of the type mentioned with good shielding and reflecting reflectors in order to achieve a higher lighting efficiency in lighting systems and by appropriate design of the upper light distribution curve.
  • a pendant luminaire according to the invention has a luminaire operating efficiency of over 88%, which is substantially above the 70 to 72% of a comparable pendant luminaire with mirror reflectors of comparable shielding known to date.
  • a luminaire according to the invention In a luminaire according to the invention, more than 50% of the luminous flux is emitted upwards, with a very broad light distribution curve. Contrary to previous assumptions by experts, this enables lighting efficiency to be achieved that is even higher in rooms with a K value greater than 1.5 than in a system with only downward-radiating, equally shielded mirror lights.
  • the K value is a parameter of the Room dimensions and defined by the product of length times width divided by the sum of length and width multiplied by the height. In rooms with a height of 2.8 m to 3 m, the aforementioned condition for an area larger than 50 m 2 is fulfilled. In smaller rooms - common single rooms - the same lighting efficiency can still be achieved as with exclusively direct-luminaires.
  • the pendant lamp has a housing 2 with a frame 20, within which a side reflector 3 is arranged on opposite longitudinal walls; each of these side reflectors consists of a bottom mirror 32, which ends at the top in a boundary edge 30, which is then followed by an oppositely curved top mirror 31.
  • the top and bottom mirrors of opposite side reflectors are bent such that they radiate crosswise through an upper light exit opening 21 and through a lower light exit opening 22, respectively.
  • each side reflector has essentially the same course as known darklight mirrors; it is essentially a parabola with a focal length of 45 mm and a main axis inclined at 35 ° to the vertical, the focal point being at the center M of the lamp 1.
  • the lower mirror 32 ends below a horizontal tangential plane on the lamp 1.
  • the upper mirror 31 connected above it runs essentially on a circle with the radius R, the center N of which in the vertical plane and passing through the center of the lamp 1 lies in the upper light exit plane 21. This radius is about three times the diameter of the lamp, which is 26 mm.
  • the maximum of the light distribution curve generated by this top mirror is 120 °.
  • transverse slats 4 are arranged in a known form between the lower mirrors.
  • the upper light outlet voltage extends like the lower one across the entire width of the housing 2.
  • the lower part of this center mirror has a substantially V-shaped cross section and is formed by auxiliary mirrors 51, the lower edge 50 of which only extends to the transverse slats 4.
  • auxiliary mirrors runs according to a parabola with a focal length of 17 mm, the main axis of which passes through the center M of the respectively adjacent lamp 1 or 1 'and forms an angle of 20 ° with the vertical.
  • the distance A from the center M of each lamp from the plane of symmetry S and the distance B from its center from the horizontal plane passing through the lower edge 50 of the center mirror 5 are dimensioned such that the shielding angle ⁇ 'determined thereby is at least as large as that required and by the side reflectors 3 given shielding angles y.
  • the auxiliary mirror 51 ends at the top somewhat below the horizontal plane passing through the center M of the lamp.
  • Fig. 1 the free beam angle of the lamp 1 is entered; the upper free jet angle is designated a and is considerably larger than the lower free jet angle designated ⁇ .
  • a the upper free jet angle
  • ⁇ the lower free jet angle

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP81109267A 1981-03-27 1981-10-29 Pendelleuchte Expired EP0061527B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109267T ATE11693T1 (de) 1981-03-27 1981-10-29 Pendelleuchte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3112253 1981-03-27
DE19813112253 DE3112253A1 (de) 1981-03-27 1981-03-27 Pendelleuchte

Publications (2)

Publication Number Publication Date
EP0061527A1 EP0061527A1 (de) 1982-10-06
EP0061527B1 true EP0061527B1 (de) 1985-02-06

Family

ID=6128526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109267A Expired EP0061527B1 (de) 1981-03-27 1981-10-29 Pendelleuchte

Country Status (3)

Country Link
EP (1) EP0061527B1 (tr)
AT (1) ATE11693T1 (tr)
DE (1) DE3112253A1 (tr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001839A1 (de) * 1990-01-23 1991-07-25 Adp Automaten Gmbh Pendelleuchte mit einem eine lichtaustrittsoeffnung aufweisenden leuchtengehaeuse

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3346786A1 (de) * 1983-12-23 1985-08-22 Maschinenfabrik Georg Kiefer Gmbh, 7000 Stuttgart Haengeleuchte
DE4413070A1 (de) * 1994-04-15 1995-10-19 Thorn Licht Gmbh Arbeitsplatzleuchte
WO2001065171A2 (de) * 2000-02-29 2001-09-07 Lt-Licht-Technik Gmbh Reflektoranordnung für eine leuchte
DE102014119616A1 (de) 2014-12-23 2016-06-23 Siteco Beleuchtungstechnik Gmbh LED-Linsenkörper zur Erzeugung eines Direkt- und Indirektlichtanteils

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2341895A (en) * 1940-07-12 1944-02-15 Morris B Beck Fluorescent tube lighting fixture
FR1074976A (fr) * 1953-02-21 1954-10-11 Dispositif d'éclairage permettant d'éviter l'éblouissement et de contrôler le flux lumineux
US3158327A (en) * 1961-09-15 1964-11-24 Herst Lighting Corp Fluorescent lighting unit
DE1963881A1 (de) * 1969-12-20 1971-06-24 Licentia Gmbh Leuchte mit Reflexschicht-Leuchtstofflampe
DE7910659U1 (de) * 1979-04-11 1979-07-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Pendelleuchte mit teilweise nach oben strahlender optik
DE3014336A1 (de) * 1980-04-15 1981-10-22 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Nach oben und unten abstrahlende leuchte

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001839A1 (de) * 1990-01-23 1991-07-25 Adp Automaten Gmbh Pendelleuchte mit einem eine lichtaustrittsoeffnung aufweisenden leuchtengehaeuse

Also Published As

Publication number Publication date
EP0061527A1 (de) 1982-10-06
ATE11693T1 (de) 1985-02-15
DE3112253A1 (de) 1982-10-28
DE3112253C2 (tr) 1987-06-04

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