Explosion-proof luminaire

Patent metadata

Field	Value
Publication number	US-10317063-B2
Application number	US-201314911417-A
Country	US
Kind code	B2
Filing date	Aug 13, 2013
Priority date	Aug 13, 2013
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

The invention relates to an explosion-proof luminaire (1) comprising a luminaire housing (2), at least one light source (3) arranged in the luminaire housing (2), a reflective device (4) assigned to the light source (3) for deflecting light emitted by the light source (3) in the direction of a light exit opening (5) in the luminaire housing (2) and a cooling device (6) assigned to the light source (3) and/or the luminaire housing (2). In particular, an inner side (7) of the luminaire housing (2) is formed, at least pointwise, as a reflective device (4) and/or the cooling device (6) is formed in one piece with the luminaire housing (2).

First claim

The invention claimed is:

1. An explosion-proof lamp comprising:
a lamp housing that defines a light outlet opening and comprises an inner side, said inner side of the lamp housing defining a housing interior;
at least one light source arranged in said lamp housing;
a reflection device associated with said at least one light source for deflecting light emitted by said at least one light source in a direction of said light outlet opening of said lamp housing;
a cooling device associated with said lamp housing,
wherein said inner side of said lamp housing is formed, at least in some locations, as said reflection device,
wherein said cooling device and said reflection device are integral with and formed in one piece with said lamp housing, and
wherein said light outlet opening is covered by a cover plate that is translucent or transparent;

a cover plate holder that is assigned to said light outlet opening, said cover plate holder coupled to said lamp housing to fasten said cover plate to said lamp housing such that said coupling of said cover plate holder and said cover plate with said lamp housing is compliant with ignition protection class Ex-d,
wherein said cover plate holder comprises:
a placement flange that defines and adjoins a holder opening, wherein said cover plate is placed on and supported by said placement flange such that at least a portion of said cover plate covers said holder opening, and
an insertion flange that protrudes from a lateral end of said placement flange, wherein the insertion flange extends in a direction toward said housing interior and connects to said inner side of said lamp housing when said cover plate holder is coupled to the lamp housing; and

a printed circuit board ring having a first surface and a second surface that is opposite to said first surface,
wherein said at least one light source is disposed on said first surface of said printed circuit board ring, and
wherein when the cover plate holder is coupled to the lamp housing, said printed circuit board ring is clamped between an upper end of said insertion flange and a stepped shoulder formed on said inner side of said lamp housing such that said second surface of said printed circuit board ring engages said upper end of said insertion flange and said first surface of said printed circuit board ring engages said stepped shoulder.

2. The explosion-proof lamp according to claim 1 , characterized in that said reflection device is formed as a coating of said inner side.

3. The explosion-proof lamp according to claim 1 , characterized in that said lamp housing is formed to be a substantially semi-cylindrical or hemispherical casing, where said reflection device is formed along a curved portion of said casing on said inner side.

4. The explosion-proof lamp according to claim 1 , characterized in that said cooling device is formed on an outer side of said lamp housing that is opposite said inner side.

5. The explosion-proof lamp according to claim 1 , characterized in that said cooling device comprises a number of cooling fins protruding outwardly from an outer side of said lamp housing that is opposite said inner side.

6. The explosion-proof lamp according to claim 5 , characterized in that said cooling fins have a same height and/or length.

7. The explosion-proof lamp according to claim 1 , characterized in that openings at oppositely disposed longitudinal ends of said lamp housing are covered by end cover plates that are detachably fastened to said lamp housing.

8. The explosion-proof lamp according to claim 7 , characterized in that support flanges protrude on either of said longitudinal ends from an outer side of said lamp housing, through which fastening screws can be passed for detachably fastening said oppositely disposed end cover plates.

9. The explosion-proof lamp according to claim 1 , characterized in that said at least one light source is disposed on said inner side of said lamp housing.

10. The explosion-proof lamp according to claim 1 , characterized in that a connection between said cover plate and said placement flange is configured in compliance with ignition protection class Ex-d.

11. The explosion-proof lamp according to claim 10 , characterized in that the connection between said cover plate and said placement flange is formed by adhesive bonding.

12. The explosion-proof lamp according to claim 1 , characterized in that said connection between said insertion flange and said inner side of said lamp housing is formed in compliance with ignition protection class Ex-d.

13. The explosion-proof lamp according to claim 1 , characterized in that said insertion flange is formed as a screw-in ring, where a screw connection between said inner side of said lamp housing and an outer side of said screw-in ring is affected by an Ex-d thread.

14. The explosion-proof lamp according to claim 13 , characterized in that said printed circuit board ring is mounted on said screw-in ring.

15. The explosion-proof lamp according to claim 13 , wherein said screw-in ring is screwed into said lamp housing.

16. The explosion-proof lamp according to claim 1 , characterized in that said cooling device is formed by an outer side of said lamp housing.

17. An explosion-proof lamp comprising:
a lamp housing that defines a light outlet opening and comprising an inner side and an outer side that is opposite to the inner side, said inner side of the lamp housing defining a housing interior;
at least one light source arranged in said lamp housing, wherein said inner side of said lamp housing comprises a bearing flange protruding into said housing interior, and wherein said bearing flange is configured to detachably fasten said at least one light source to the lamp housing;
a reflection device defined by the inner side and associated with said at least one light source for deflecting light emitted by said at least one light source in a direction of said light outlet opening of said lamp housing;
a cooling device defined by said outer side,
wherein said cooling device and said reflective device are integrally formed with said lamp housing such that said reflective device, said cooling device, and said lamp housing are one piece, and

a cover plate holder that is separate from said lamp housing and assigned to said light outlet opening, said cover plate holder coupled to said lamp housing to couple a cover plate to said lamp housing such that:
(a) said coupling of said cover plate holder and said cover plate with said lamp housing is compliant with ignition protection class Ex-d, and
(b) at least a portion of said cover plate covers the light outlet opening, and
wherein said cover plate holder comprises a placement flange that defines and adjoins a holder opening,
wherein said cover plate is placed on and supported by said placement flange such that at least a portion of said cover plate covers said holder opening, and
wherein said cover plate holder comprises an abutment flange facing outwardly from said placement flange and abutting from beneath against said bearing flange while forming a connection that is in compliance with ignition protection class Ex-d.

18. The explosion-proof lamp according to claim 17 , wherein said bearing flange extends along said light outlet opening.

19. The explosion-proof lamp according to claim 17 , wherein a separation rib is disposed between said placement flange and said abutment flange, wherein the separation rib protrudes substantially perpendicular from said cover plate holder, and wherein the separation rib ex

Assignees

• Eaton Protection Systems Ip Gmbh & Co Kg
• Eaton Intelligent Power Ltd

Inventors

• Ott Toni
• Burmeister Jens

Classifications

• F21V29/77

  with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section · CPC title

• F21V31/005

  Sealing arrangements therefor · CPC title

• F21V29/507

  of means for protecting lighting devices from damage, e.g. housings · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V25/12 Primary

  Flameproof or explosion-proof arrangements · CPC title