Explosion proof luminaire

Patent metadata

Field	Value
Publication number	US-11022287-B2
Application number	US-201916415114-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	Sep 12, 2018
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

The present disclosure envisages a luminaire (100). The luminaire (100) comprises at least an array of light-emitting diodes (10), a driver (20) for driving the array of light-emitting diodes (10), a first compartment (30), a second compartment (40), a perforated wall (50), an array of fins (60) and a lid (70). The first compartment (30) houses the array of light-emitting diodes (10). The second compartment houses the driver (20). The second compartment (40) is separated from the first compartment (30) by a perforated wall (50). The array of fins (60) is disposed on an operative external wall surface surrounding the first compartment (30) and/or the second compartment (40) of the luminaire (100). The lid (70) is removably fitted on an operative end of the first compartment (30). The luminaire (100) has an explosion-proof construction, dissipates heat efficiently, is less expensive and is easy to assemble.

First claim

We claim:

1. An explosion proof luminaire ( 100 ) comprising:
at least one array of light-emitting diodes ( 10 );
a driver ( 20 ) for driving said array of light-emitting diodes ( 10 );
a first compartment ( 30 ) housing said array of light-emitting diodes ( 10 );
a second compartment ( 40 ) housing said driver, wherein said second compartment ( 40 ) is separated from said first compartment ( 30 ) by a perforated wall ( 50 );
wherein the first compartment is attached to the second compartment with an explosion proof connection such that the luminaire is explosion proof;
wherein the explosion proof connection between the first compartment and second compartment is provided by a threaded engagement between the first and second compartments;
wherein the perforated wall has a plurality of perforations to reduce pressure piling in the event of an explosion within the luminaire, which provides for gas pressure distribution and balancing;
wherein at least one perforation ( 52 ) of said perforated wall ( 50 ) facilitates passage of an electrical conductor which connects said array of light-emitting diodes ( 10 ) and said driver ( 20 );
wherein the minimum value of the ratio of an area of said plurality of perforations ( 52 ) to an area of said perforated wall ( 50 ) is at least 0.13; and
a lid ( 70 ) removably fitted on an end of said first compartment ( 30 ).

2. The luminaire ( 100 ) as claimed in claim 1 , wherein said lid ( 70 ) includes:
an opening;
a transparent sheet ( 72 ) disposed in said opening,
a peripheral surface; and
a set of helical threads ( 74 ) provided on said peripheral surface, said threads ( 74 ) facilitating removably fitting said lid ( 70 ) on said first compartment ( 30 ).

3. The luminaire ( 100 ) as claimed in claim 2 , wherein a thickness of said transparent sheet ( 72 ) ranges from 8 mm to 15 mm.

4. The luminaire ( 100 ) as claimed in claim 2 , wherein said transparent sheet ( 72 ) is spaced apart from said array of light-emitting diodes ( 10 ) by a predetermined distance.

5. The luminaire ( 100 ) as claimed in claim 4 , wherein said predetermined distance is in the range of 8 mm to 25 mm.

6. The luminaire ( 100 ) as claimed in claim 1 , wherein said array of light-emitting diodes ( 10 ) is encapsulated.

7. The luminaire ( 100 ) as claimed in claim 1 , wherein there is a first array of fins ( 60 ) disposed on an external wall surface surrounding said first compartment ( 30 ) and a second array of fins ( 60 ) disposed on an external wall surface surrounding said second compartment ( 40 ) of said luminaire ( 100 ).

8. An explosion proof luminaire ( 100 ) comprising:
at least one array of light-emitting diodes ( 10 );
a driver ( 20 ) for driving said array of light-emitting diodes ( 10 );
a first compartment ( 30 ) housing said array of light-emitting diodes ( 10 );
a second compartment ( 40 ) housing said driver, wherein said second compartment ( 40 ) is separated from said first compartment ( 30 ) by a perforated wall ( 50 );
wherein the first compartment is attached to the second compartment with an explosion proof connection such that the luminaire is explosion proof;
wherein the explosion proof connection between the first compartment and second compartment is provided by a threaded engagement between the first and second compartments;
wherein the perforated wall has a plurality of perforations to reduce pressure piling the event of an explosion within the luminaire, which provides for gas pressure distribution and balancing;
wherein at least one perforation ( 52 ) of said perforated wall ( 50 ) facilitates passage of an electrical conductor which connects said array of light-emitting diodes ( 10 ) and said driver ( 20 );
a lid ( 70 ) removably fitted on an end of said first compartment ( 30 ); and wherein the plurality of perforations on the perforated wall are evenly distributed around an outer portion of the perforated wall.

Assignees

• Appleton Grp Llc

Inventors

• Leber William
• Dube Tejas D
• Mandlekar Karan C
• Muchandi Sagar R

Classifications

• F21V23/007 Primary

  enclosed in a casing · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• H05B45/00

  Circuit arrangements for operating light-emitting diodes [LED] · CPC title

• F21V23/008

  the casing being outside the housing of the lighting device · CPC title

• F21V29/773 Primary

  the planes containing the fins or blades having the direction of the light emitting axis · CPC title