Outdoor Electrical Control Box Sealing Against Critter Ingress
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Solution Overview
Problem
Existing electrical control boxes are vulnerable to critter ingress, which causes physical damage, accelerates corrosion, and introduces moisture-related issues, with existing solutions like fencing having limited effectiveness against crawling, climbing, or flying critters.
Innovation Solution
Application of a two-part, 100% solids polyurethane or polyurea sealant with elastomeric properties, which cures to form a durable, compressible barrier that includes chemical aversion agents and anti-microbial biocides, applied through gaskets, tapes, and injectable polymers to seal gaps and protect against critter access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fencing is used around the electrical control box, then some critter access is blocked, but critters can still crawl, climb, dig or fly through the fence
Solution Approach 1:
The patent applies a flexible sealant material that forms a thin film barrier around the electrical control box, sealing gaps and crevices where critters could penetrate. This flexible membrane approach provides continuous coverage without the gaps present in rigid fencing structures.
Solution Approach 2:
The sealant combines multiple functional components into a single composite material: adhesive properties for bonding, elastomeric characteristics for flexibility and sealing, chemical aversion agents for critter deterrence, and biocides for microbial protection. This multi-functional composite resolves the limitation of single-purpose fencing.
2Ease of operation
If access doors and cable openings are provided for electrical control box operation, then maintenance and cable installation are enabled, but these openings provide ingress locations for critters
Solution Approach 1:
The sealant forms flexible sealing films around door perimeters and cable penetrations, creating barriers that block critter access while allowing the doors and cables to maintain their operational functionality. The elastomeric nature of the sealant accommodates movement and installation requirements.
Solution Approach 2:
The sealant acts as an intermediary material between the electrical control box structure and the external environment, specifically at vulnerable openings. It mediates between the need for access and the need for protection, allowing human access while blocking critter ingress.
3Object-affected harmful factors
If the electrical control box is sealed to prevent critter ingress, then critter damage is reduced, but moisture protection and corrosion resistance may be compromised
Solution Approach 1:
The sealant incorporates biocides and corrosion-resistant chemical components within its matrix, providing dual protection: physical blocking of critters and chemical protection against moisture and microbial corrosion. This composite formulation resolves the contradiction between sealing and corrosion resistance.
Solution Approach 2:
The sealant's chemical composition is designed to change from uncured to cured state, developing protective properties. The cured sealant provides enhanced corrosion resistance and moisture protection while maintaining the physical barrier against critters, transforming the material properties to meet multiple protection requirements.
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 sealant provides a robust, critter-resistant barrier that prevents ingress, protects against corrosion, and maintains enclosure integrity by sealing against moisture and critters, while being non-hazardous and environmentally friendly.
Implementation Method 1
injecting an uncured, two-part, 100% solids, mix of polyurethane or polyurea onto any of the housing, door opening, perimeter, or conduit, and allowing the mix to cure
Data Source
AI summary
An electrical control box for outdoor use that has a number of sealants provided to help prevent moisture from causing corrosion to the components inside the box, as well as providing resistance to attack of the box by critters, such as raccoons, mice, and the like. In some embodiments, a curable polyurethane is used.