Water-Resistant Extruded Housing for Emergency Lighting
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Solution Overview
Problem
Emergency lighting systems in wet environments face challenges due to the inability of contemporary housings to protect against water ingress, maintain water resistance, and provide access to features like test switches while meeting water-resistant ratings and accessibility requirements.
Innovation Solution
An improved water-resistant housing with an endcap design that forms a sealed cavity for emergency lighting components, using extruded materials to create a continuous surface that sheds water and eliminates seams, allowing for various component installations and connections while maintaining water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed luminaire is used to protect against water ingress, then water resistance is improved, but accessibility to features like test switches deteriorates
Solution Approach 1:
The housing is divided into multiple segments including a main body and an extended portion, creating distinct functional zones. The extended portion houses accessible features like test switches while the main sealed body protects lighting components, resolving the contradiction between sealing and accessibility.
Solution Approach 2:
A conduit body acts as an intermediary element connecting the sealed luminaire to external components. This intermediary provides a transition zone where wires and connections can access the sealed environment without compromising the seal, enabling both protection and accessibility.
2Duration of action of moving object
If additional components like power supply are added externally to fulfill emergency lighting requirements, then emergency lighting characteristics are improved, but susceptibility to water damage deteriorates
Solution Approach 1:
The housing structure merges multiple functions into a single integrated unit. The extended portion of the housing accommodates both the emergency lighting component and additional components like power supplies, creating a unified sealed environment that protects all components from water while maintaining emergency lighting capabilities.
Solution Approach 2:
The housing is designed as a multi-functional enclosure that can accommodate various components (luminaire, power supply, control devices) within its sealed structure. This universal design allows different component configurations while maintaining water resistance, enabling extended emergency lighting duration without exposing components to water damage.
3Adaptability or versatility
If connections between sealed luminaire and additional components are made, then functionality and connectivity are improved, but points of water intrusion are introduced
Solution Approach 1:
The conduit body is nested within or integrated with the sealed housing structure, creating a hierarchical arrangement where the conduit provides a protected pathway for connections. This nested design allows wires and connectors to pass through the sealed boundary without creating direct exposure points, maintaining water resistance while enabling connectivity.
Data Source
AI summary
A housing and an endcap may provide a water-resistant enclosure for an emergency lighting component. An upper side of the housing may include a curved surface extending above a vertical side of the housing. The vertical side may include an inclined surface and an extended edge that provide a first concave opening below the curved surface. A base side of the housing may include a curved surface extending partially below the vertical side. The vertical side may include an additional extended edge and a curved surface that provide a second concave opening where the vertical side joins the base side. The endcap may include a rim that overlaps a portion of the housing. The first or second concave openings may receive fasteners to attach the endcap. Mounting brackets may attach to the first or second concave openings, such as to attach the housing to a surface.