Embedded LED Light Source in Potting Compound for Hazardous Areas

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Solution Overview

Problem

Lighting fixtures in explosive atmospheres, such as Class 1, Division 2 areas, face challenges in preventing electrical discharges that can ignite flammable gases, vapors, or dusts, as traditional designs may not adequately seal against these hazards.

Innovation Solution

An LED light source is embedded in an optically clear potting compound within a thermally conductive enclosure, eliminating voids and using a potting compound to seal the exterior, thereby preventing explosive atmospheres from entering and minimizing spark risks, while allowing light emission and heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional lighting fixtures are used in explosive atmospheres, then lighting function is provided, but electrical discharges may ignite flammable gases, vapors, or dusts

Engineering Contradiction:

Improvesafety in explosive atmosphereVSAvoidelectrical discharge risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent removes the traditional enclosure and sealing structures by embedding the LED light source directly in potting compound. This extraction of the conventional housing eliminates potential leakage points and electrical discharge risks while maintaining the lighting function through the optically clear potting compound medium.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The potting compound creates an inert barrier between the electrical components and the explosive atmosphere. By embedding the LED and electrical components within the potting compound, the invention isolates potential electrical discharge sources from flammable gases, vapors, or dusts, effectively creating a protective inert environment.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

2Reliability

If heavy metal and glass casings are used to seal lighting fixtures, then protection against explosive atmospheres is improved, but weight and flexibility are reduced

Engineering Contradiction:

Improvesealing effectivenessVSAvoidfixture weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent replaces rigid metal and glass casings with a flexible potting compound enclosure. The potting compound forms a flexible yet effective barrier that seals the LED light source while eliminating the need for heavy structural housing, thereby reducing weight and improving flexibility without compromising protection against explosive atmospheres.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The invention uses composite construction by embedding the LED in potting compound, combining the optical properties of the compound with the electrical properties of the LED. This composite approach eliminates the need for separate metal and glass components, reducing overall weight while maintaining sealing effectiveness.

Inventive Principle:

Principle #40Composite materials

3Reliability

If the LED is embedded in potting compound, then sealing and spark risk are minimized, but light emission and heat dissipation must be maintained

Engineering Contradiction:

Improvesealing and safetyVSAvoidlight emission efficiency

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The patent uses optically clear potting compound as an intermediary medium that serves multiple functions: it provides sealing and protection against explosive atmospheres while simultaneously allowing light transmission. The optical clarity of the compound ensures that light emission is not impeded, and its thermal properties enable heat dissipation from the embedded LED.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 minimizes the risk of electrical discharges igniting flammable substances, provides a lightweight and flexible lighting solution, and eliminates the need for heavy metal and glass casings, ensuring safety and reliability in hazardous environments.

Implementation Method 1

a potting compound covering an exterior side of said top of said enclosure and substantially sealing said enclosure

Methodology Applied

Scientific EffectSealing:

Implementation Method 2

At least one light emitting diode (LED) is deployed within said internal volume of said enclosure

Methodology Applied

Scientific EffectLight emitting diode: Light Emitting Diode

Implementation Method 3

An LED light source is embedded in an optically clear potting compound within a thermally conductive enclosure

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP2587136B1Embedded LED light source

Publication Date: 2014.12.24 DIALIGHT CORP

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AI summary

A light source is disclosed. The light source includes an enclosure forming an internal volume, the enclosure having at least one side, a top and a bottom. At least one light emitting diode (LED) is deployed within the internal volume of the enclosure. The light source also includes a potting compound covering said top of said enclosure and substantially sealing said enclosure.