EP1630475A1 - Formation d' un dispositif d'illumination - Google Patents

Formation d' un dispositif d'illumination Download PDF

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Publication number
EP1630475A1
EP1630475A1 EP04396055A EP04396055A EP1630475A1 EP 1630475 A1 EP1630475 A1 EP 1630475A1 EP 04396055 A EP04396055 A EP 04396055A EP 04396055 A EP04396055 A EP 04396055A EP 1630475 A1 EP1630475 A1 EP 1630475A1
Authority
EP
European Patent Office
Prior art keywords
luminaire
illuminator
casing
protective cover
luminaire according
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.)
Ceased
Application number
EP04396055A
Other languages
German (de)
English (en)
Inventor
Vesa Mäkelä
Mika Sumuvuori
Tarmo Rintala
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.)
Centaurea Oy
Original Assignee
Centaurea Oy
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 Centaurea Oy filed Critical Centaurea Oy
Priority to EP04396055A priority Critical patent/EP1630475A1/fr
Priority to PCT/FI2005/050301 priority patent/WO2006021620A1/fr
Priority to BRPI0514657-7A priority patent/BRPI0514657A/pt
Publication of EP1630475A1 publication Critical patent/EP1630475A1/fr
Priority to NO20070601A priority patent/NO20070601L/no
Ceased 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/013—Housings, e.g. material or assembling of housing parts the housing being an extrusion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/04—Provision of filling media
    • 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 for zone 0 hazardous areas, the luminaire comprising an illumination source, and a cable for providing electric power to illuminate the illumination source.
  • Hazardous locations mean such areas in which a risk of explosions exist.
  • the risk of explosions may be due to existence of explosive materials in such areas.
  • These hazardous locations are, for example, petrochemical plants, etc.
  • such hazardous locations may exist in normally safe areas.
  • fuel containers may be stored in service buildings. It is extremely important to eliminate any risks of sparking in such areas.
  • the sparking must not be induced for electrostatics, inductivity, electric devices (e.g. luminaires), breakage of an electric device or any other reason.
  • many requirements are set for electric devices which may be used in hazardous locations. These kind of devices must be protected against sparking, the electric power supplied to the devices must be limited, warming-up of surfaces of the devices must not exceed certain limits, etc.
  • the determination that areas can be classified as hazardous locations is based on the following:
  • Zones In Europe three Zones are defined where explosive mixtures of gas or powder and air can exist. The most dangerous zone is Zone 0 in which the mixture is continuously or almost continuously present. Zone 1 is defined as a location where the mixture is likely to occur in normal operations. In Zone 2 locations the mixture is unlikely or will only exist for a short time.
  • the devices which are intended to be used in hazardous locations must be accepted by a Notified Body before the devices are allowed to be used in such locations.
  • IEC 60079-26, section 4.2.1a discloses requirements for the devices for zone 0 hazardous areas against two faults occurring independently of each other.
  • IEC 60079-26, section 4.2.3 describes general information of requirements for encapsulation as a sole means of protection.
  • IEC 60079-18 section 7.3 describes maximum limits of free space in the encapsulation for two levels of protection: 100 cm 3 for "mb" and 10 cm 3 for "ma”.
  • IEC 60079-0 section 26.8 describes requirements for resistance to impact and section 26.8 describes requirements for thermal endurance to heat.
  • One other aspect when designing explosion-protected luminaires for maintenance and service work is the size and weight of the luminaire.
  • the luminaire should be as small and light as possible. Fluorescent lamps are not very small wherein it is not easy to reduce the size of the luminaire.
  • the present invention is based on the idea that the illumination source is positioned inside a casing and the free space between the outer surface of the illumination source and the inner surface of the casing is filled with a filler material.
  • the thickness of the casing is designed so that the distance from the outer surface of the casing to the electrically active part of the illumination source is greater or equal than a predetermined minimum. This kind of structure is called as strengthened casting and some limit values are defined in IEC standards.
  • the casing is shaped so that at least the form of the inner surface of the casing follows the shape of the outer surface of the illumination source.
  • the luminaire according to the present invention is primarily characterised in that the luminaire further comprises an illumination unit comprising a body in connection with which the illuminator is attached, and a protective cover placed above the illuminator for protecting the illuminator, and that the free space of the body is filled with a filler to make the illumination unit substantially gas tight.
  • the illumination source of the explosion-protected luminaire of the present invention comprises light emitting diodes (LED) which are not very sensible to impacts and they don't induce electric spikes (voltage and/or current) if they are broken.
  • the LEDs also have the advantage that they don't generate too much heat so there is no need to arrange any cooling apparatus inside the casing where the LEDs are situated.
  • the use of LEDs also makes it possible to design smaller luminaires than if normal illumination sources, e.g. fluorescent lamps were used.
  • the illuminator according to the present invention is rather easy to manufacture.
  • the illuminator is gas tight so that no sparks which may occur inside the casing can not easily affect an explosion of gas.
  • the luminaire 1 comprises the casing 2.
  • the casing 2 has a central section 2.1 and a first 2.2 and a second end section 2.3.
  • the second end section is constructed from two parts 2.3a, 2.3b.
  • the power cable 3 is connected inside the casing 2 of the luminaire 1 through the second end section 2.2.
  • the central section 2.1 of the casing is at least partly transparent to enable the illumination generated by the illumination unit 4 to radiate from the luminaire 1.
  • the electric power is supplied to the luminaire 1 by a supply unit 5 which generates a proper voltage for the luminaire.
  • the supply unit 5 also limits the electric power so that it does not exceed a certain safety limit.
  • the supply unit 5 for zone 0 hazardous area devices has to tolerate a combination of any of two independent different faults. It should be mentioned here that the supply unit 5 need not be located into the zone 0 area but into zone 1 or zone 2 areas. The operation of the supply unit 5 is known as such so it is not necessary to describe it in more detail in this application.
  • the central section 2.1 of the casing 2 is preferably made of a polycarbonate tube 2.1 a which is treated to be antistatic when necessary.
  • the first 2.2 and the second end section 2.3 are also made of antistatic material or they are treated to be antistatic.
  • the power cable 3 is connected through the second end section 2.3 of the casing 2 and secured with an attachment unit 6 (Fig. 2) to the second end section 2.3.
  • the attachment unit 6 has a sealing plate 6.1 for sealing the cable via of the second end section 2.3.
  • the power cable 3 is ended at a circuit board 4.4 to which the illumination unit 4 is also connected.
  • the illumination unit 4 is formed of a body 4.2, illuminators 4.1 attached on the circuit board 4.4 and a protective cover 4.3 for the illuminators 4.1.
  • the illuminators 4.1 are for example soldered to the circuit board 4.4. In this embodiment there are three illuminators 4.1 in the illumination unit 4 but it is obvious that the number of illuminators 4.1 may be different in different embodiments.
  • the circuit board 4.4 contains wirings (not shown) to conduct electric power from the power cable 3 to the illuminators 4.1.
  • the illuminators 4.1 are protected by attaching a protective cover 4.3 on the illuminators 4.1.
  • the protective cover 4.3 is shaped so that the surface 4.3a of the protective cover 4.3 follows the shape of the illuminators 4.1 in order to minimise the free space between the surface of the illuminators 4.1 and the protective cover 4.3.
  • the illumination unit 4 is attached to the body 4.2 of the central section 2.1 of the luminaire 1.
  • the body 4.2 has a flat section onto which the circuit board 4.4 can be slided, for example.
  • the flat section 4.2a forms a kind of a groove in the body 4.2 for the illumination unit 4.
  • the groove is so dimensioned that the illumination unit 4 fits very tightly into the groove.
  • Fig. 3a illustrates the different parts of the illumination unit 4 and the assembling steps of them.
  • Fig. 3b illustrates the structure of the illumination unit 4 as a top view and as cross sections from different locations of the illumination unit 4.
  • Fig. 3c shows a more detailed view of the structure of the illumination unit 4 at the location of the illuminator 4.1.
  • the body 4.2 of the central section can be made of e.g. aluminium because it conducts heat quite well.
  • the heat conduction can further be increased by the flat section of the body because the circuit board 4.4 is laying on the flat section.
  • the good heat conduction induces the temperature of the illuminators 4.1 to stay at a lower level which increases the life time of the illuminators 4.1.
  • the filler 9 When the body 4.2 of the illumination unit 4 is filled with the filler 9, the filler 9 surrounds the illuminators 4.1, the circuit board 4.4, the power cable 3 and the protective cover 4.3 thus making the body 4.2 gas tight.
  • the body 4.2 can then be placed inside the tube 2.1 a of the central body 2.1. After that the first 2.2 and the second end sections 2.3 are attached with the central section 2.1 wherein the luminaire 1 according to the present invention is ready for use.
  • the filler 9 also makes the attachment of the power cable 3 to the luminaire 1 more secure and thus improves the reliability of the luminaire 1 against mechanical forces.
  • the critical dimensions of the luminaire 1 can be analysed with the help of Fig. 3c.
  • the electrically active parts of the luminaire 1 are inside the illuminators 4.1. If the illuminators 4.1 are LEDs, there is a chip (a radiating element) 4.1 a inside the casing 4.1 b of the illuminators 4.1 which emits radiation (light).
  • the casing of the illuminators 4.1 is filled with a filler which is not necessarily the same filler than the filler of the body 4.2. Usually the distance from the chip to the outer surface of the LED is about 1.5 mm ( 0.5 mm filler and 1 mm cover).
  • the thickness of the protective cover 4.3 has to be at least 1.5 mm so that the distance from the chip to the outer surface of the body 4.2 is at least 3 mm which is defined as a minimum limit for mastructures according to the standard IEC 60079-18 section 7.3. Therefore, the present invention provides a structure which fulfils inter alia the requirements of IEC 60079-18 section 7.3.
  • the thickness of the protective cover 4.3 can be varied in different embodiments so that the above mentioned condition is fulfilled.
  • the cross section of the body 4.2 and of the other parts of the luminaire 1 can also differ from the cross sections of the above described embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP04396055A 2004-08-27 2004-08-27 Formation d' un dispositif d'illumination Ceased EP1630475A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04396055A EP1630475A1 (fr) 2004-08-27 2004-08-27 Formation d' un dispositif d'illumination
PCT/FI2005/050301 WO2006021620A1 (fr) 2004-08-27 2005-08-29 Construction d'un illuminateur
BRPI0514657-7A BRPI0514657A (pt) 2004-08-27 2005-08-29 luminária para áreas perigosas
NO20070601A NO20070601L (no) 2004-08-27 2007-02-01 Lampekonstruksjon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04396055A EP1630475A1 (fr) 2004-08-27 2004-08-27 Formation d' un dispositif d'illumination

Publications (1)

Publication Number Publication Date
EP1630475A1 true EP1630475A1 (fr) 2006-03-01

Family

ID=34932025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04396055A Ceased EP1630475A1 (fr) 2004-08-27 2004-08-27 Formation d' un dispositif d'illumination

Country Status (4)

Country Link
EP (1) EP1630475A1 (fr)
BR (1) BRPI0514657A (fr)
NO (1) NO20070601L (fr)
WO (1) WO2006021620A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2939492A1 (fr) * 2008-12-08 2010-06-11 Jwr Dispositif d'eclairage impermeable a base de diodes electroluminescentes (led).
WO2011157635A1 (fr) * 2010-06-18 2011-12-22 R. Stahl Schaltgeräte GmbH Moyen d'éclairage à l'épreuve des explosions
BE1019215A3 (fr) * 2009-12-31 2012-04-03 Unistar Opto Corp Dispositif d'eclairage sans tube base sur des diodes electroluminescentes.
KR20140002022A (ko) * 2011-04-15 2014-01-07 쿠퍼 크로우즈-하인드즈 게엠베하 방폭 led 모듈
DE102013104240A1 (de) * 2013-04-26 2014-10-30 R. Stahl Schaltgeräte GmbH Explosionsgeschützte Anordnung elektrischer und/oder elektronischer Bauelemente

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204510A1 (de) * 2011-11-18 2013-05-23 Tridonic Jennersdorf Gmbh Rohrförmige LED-Lampe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2531968A1 (de) * 1975-07-17 1977-02-03 Stahl Niederlassung Kuenzelsau Explosionsgeschuetzte leuchte
WO1998057527A1 (fr) * 1997-06-09 1998-12-17 Centaurea Oy Procede de traitement d'un article
US6069447A (en) * 1996-08-06 2000-05-30 Egs Electrical Group Llc Thermal insulating and impact resistant indicator light apparatus
EP1156272A2 (fr) * 2000-05-19 2001-11-21 R. Stahl Schaltgeräte GmbH Source lumineuse
EP1308670A1 (fr) * 2001-10-30 2003-05-07 Centaurea Oy Luminaire anti-déflagrant
WO2003091623A1 (fr) * 2002-04-23 2003-11-06 Keith Lewis Appareil d'eclairage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO176415C (no) * 1992-10-16 1995-03-29 Technor As Lyslist for nivåglass

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2531968A1 (de) * 1975-07-17 1977-02-03 Stahl Niederlassung Kuenzelsau Explosionsgeschuetzte leuchte
US6069447A (en) * 1996-08-06 2000-05-30 Egs Electrical Group Llc Thermal insulating and impact resistant indicator light apparatus
WO1998057527A1 (fr) * 1997-06-09 1998-12-17 Centaurea Oy Procede de traitement d'un article
EP1156272A2 (fr) * 2000-05-19 2001-11-21 R. Stahl Schaltgeräte GmbH Source lumineuse
EP1308670A1 (fr) * 2001-10-30 2003-05-07 Centaurea Oy Luminaire anti-déflagrant
WO2003091623A1 (fr) * 2002-04-23 2003-11-06 Keith Lewis Appareil d'eclairage

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2939492A1 (fr) * 2008-12-08 2010-06-11 Jwr Dispositif d'eclairage impermeable a base de diodes electroluminescentes (led).
BE1019215A3 (fr) * 2009-12-31 2012-04-03 Unistar Opto Corp Dispositif d'eclairage sans tube base sur des diodes electroluminescentes.
WO2011157635A1 (fr) * 2010-06-18 2011-12-22 R. Stahl Schaltgeräte GmbH Moyen d'éclairage à l'épreuve des explosions
KR20140002022A (ko) * 2011-04-15 2014-01-07 쿠퍼 크로우즈-하인드즈 게엠베하 방폭 led 모듈
CN103562630A (zh) * 2011-04-15 2014-02-05 库珀·克劳斯-海因兹有限责任公司 防爆led模块
JP2014515191A (ja) * 2011-04-15 2014-06-26 クーパー クロス−ハインズ ゲゼルシャフト ミット ベシュレンクテル ハフツング 防爆性ｌｅｄモジュール
JP2015222832A (ja) * 2011-04-15 2015-12-10 クーパー クロス−ハインズ ゲゼルシャフト ミット ベシュレンクテルハフツング 防爆性ｌｅｄモジュール
CN103562630B (zh) * 2011-04-15 2016-03-30 库珀·克劳斯-海因兹有限责任公司 防爆led模块
US9541272B2 (en) 2011-04-15 2017-01-10 Cooper Crouse-Hinds Gmbh Explosion-proof LED module
DE102013104240A1 (de) * 2013-04-26 2014-10-30 R. Stahl Schaltgeräte GmbH Explosionsgeschützte Anordnung elektrischer und/oder elektronischer Bauelemente
DE102013104240B4 (de) * 2013-04-26 2015-10-22 R. Stahl Schaltgeräte GmbH Explosionsgeschützte Anordnung elektrischer und/oder elektronischer Bauelemente

Also Published As

Publication number Publication date
WO2006021620A1 (fr) 2006-03-02
NO20070601L (no) 2007-05-08
BRPI0514657A (pt) 2008-06-24

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