Explosion-proof Luminaire Segmented Enclosure Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing explosion-protected luminaires face challenges in managing explosive gas mixtures within their enclosures, as filling materials used to reduce gas volume can hinder light exit and scatter light, and do not effectively mitigate pressure peaks when an ignition occurs near the light source.
Innovation Solution
An explosion-protected luminaire design featuring a translucent enclosure with a separating wall that divides the inner space into two sections: one without fill material for the light source and another with open-pored fill material, allowing gas to escape and absorb pressure peaks, thereby preventing excessive pressure buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fill material is introduced in the enclosure to reduce gas volume, then explosion risk is reduced, but light exit is hindered and light scattering occurs
Solution Approach 1:
The enclosure is divided into two separate sections by a separating wall: a first section containing the light source that remains free of fill material to ensure optimal light exit, and a second section containing the fill material to provide explosion protection. This segmentation allows each section to fulfill its specific function without compromise.
Solution Approach 2:
A separating wall acts as an intermediary structure between the light source section and the fill material section. This wall with openings allows the system to maintain both light transmission quality and explosion protection, as the fill material is confined to the second section where it cannot interfere with light exit from the first section.
2Reliability
If fill material is introduced to reduce gas volume, then explosion risk is reduced, but pressure peaks during ignition are not effectively mitigated
Solution Approach 1:
The enclosure is divided into two separate sections by a separating wall: a first section containing the light source that remains free of fill material to ensure optimal light exit, and a second section containing the fill material to provide explosion protection. This segmentation allows each section to fulfill its specific function without compromise.
Solution Approach 2:
A separating wall acts as an intermediary structure between the light source section and the fill material section. This wall with openings allows the system to maintain both light transmission quality and explosion protection, as the fill material is confined to the second section where it cannot interfere with light exit from the first section.
3Weight of moving object
If the enclosure is made thin-walled to reduce weight, then portability is improved, but pressure relief capability is reduced
Solution Approach 1:
The enclosure is divided into two separate sections by a separating wall: a first section containing the light source that remains free of fill material to ensure optimal light exit, and a second section containing the fill material to provide explosion protection. This segmentation allows each section to fulfill its specific function without compromise.
Solution Approach 2:
A separating wall acts as an intermediary structure between the light source section and the fill material section. This wall with openings allows the system to maintain both light transmission quality and explosion protection, as the fill material is confined to the second section where it cannot interfere with light exit from the first section.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces the risk of explosion and pressure peaks by allowing gas to escape into the fill material section, maintaining a clear light path and preventing pressure buildup, while maintaining a thin-walled enclosure without the need for additional pressure relief mechanisms.
Implementation Method 1
the fill material is an open pored material... an excessive pressure build-up is avoided. Due to the openings in the separating wall, gas can escape in the second section of the inner space that is provided with open pored fill material and thus cannot build up high pressure.
Implementation Method 2
an enclosure (10) with a translucent section (12a) that surrounds an inner space (15)... the first section without fill material includes a light source (19) and the first section (17) is translucent in a region proximate to the light source
Data Source
AI summary
The luminaire according to the invention comprises an inner space that is separated into a first section and a second section by a separating wall. While the first section is free and comprises at least one light source, an operating circuit for the light source and/or other components that form potential ignition sources and/or other components that may not be considered as ignition sources are arranged in the second section. The second section is provided with an open pored fill material. The separating wall comprises at least one opening that allows a flow connection between the two sections. The section of the inner space provided with fill material serves as pressure relief volume for the first section, in which the light source is arranged. The fill material can fill the section completely or partly.