Junction Box Weather Barrier With Flange Seal Against Moisture Ingress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing weatherproof barriers for junction boxes on exterior building walls often fail to provide a comprehensive seal, allowing moisture to penetrate and compromising the building's weatherproof integrity.
Innovation Solution
A weatherproof enclosure system comprising a junction box with a sidewall and a cover plate, surrounded by a non-permeable sheet with a flange that forms a seal with a deformable material, and an interior seal to prevent fluid entry, ensuring a secure and watertight connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a weatherproof barrier is provided around the junction box, then moisture protection is improved, but the seal reliability deteriorates due to inadequate sealing at the interface between the cover plate and junction box
Solution Approach 1:
A flexible seal member comprising a radially extending flange and an axially extending leg is provided. The flange seals between the cover plate and junction box, while the leg extends into the junction box to seal against the interior surface of the sidewall. This flexible membrane structure provides comprehensive sealing that prevents moisture penetration at both the interface and interior surfaces.
Solution Approach 2:
The weatherproof barrier integrates multiple sealing components including a flange, leg, and seal member formed as an integrated unit. This composite structure combines different geometric features (radial flange and axial leg) to address multiple sealing surfaces simultaneously, ensuring reliable moisture protection.
2Object-affected harmful factors
If the weatherproof barrier is made from non-permeable material, then moisture resistance is improved, but the installation complexity increases due to the need for precise sealing integration
Solution Approach 1:
The flange, leg, and seal member are formed as an integrated unit from a single non-permeable material sheet. This merging of components eliminates the need for separate sealing elements and simplifies installation, as the entire sealing assembly can be installed as one piece while maintaining effective moisture resistance.
Solution Approach 2:
The integrated seal assembly performs multiple sealing functions simultaneously: the flange seals the interface between the cover plate and junction box, while the leg seals the interior surface of the sidewall. This multi-functional design reduces installation complexity by providing comprehensive sealing through a single component.
3Reliability
If the flange extends past the open end of the junction box, then the seal coverage is improved, but the device complexity increases due to the deformable material requirement
Solution Approach 1:
The flange is formed from a flexible non-permeable material that can be deformed during installation to extend past the open end of the junction box. This flexibility allows the flange to conform to the junction box opening and create an effective seal without requiring complex rigid structures or additional components.
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
The system effectively prevents moisture ingress, maintaining the building's weatherproof integrity by forming a reliable seal around the junction box and its associated cables, even under varying environmental conditions.
Implementation Method 1
the flange may be made from a deformable material that deforms when the cover plate is installed on the junction box
Implementation Method 2
a weather barrier, comprising a sheet made from non-permeable material
Implementation Method 3
the cover plate may carry a sealing material that seals against the top peripheral edge of the flange
Data Source
AI summary
A combination of a junction box, a cover plate, and a weather barrier is provided. The junction box has a sidewall, an open end, and a closed end. The cover plate is removably connected to the junction box, and is sized to cover the open end of the junction box. The weather barrier has a non-permeable sheet with a wall cover portion that surrounds a flange that defines a junction box receiving area. The flange protrudes from a first face of the wall cover portion and terminates in a top peripheral edge. The junction box is positioned within the junction box receiving area, the flange surrounds the junction box, and the top peripheral edge extends toward the open end of the junction box. The cover plate engages and forms a seal with the top peripheral edge of the flange when the cover plate is connected to the junction box.