LED Lighting Device with Inert Gas Chamber for Hazardous Areas
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Solution Overview
Problem
Existing lighting devices, particularly those using LEDs, lack operational safety and reliability, especially in environments prone to fire and explosion risks, and require enhancement in functionality and safety features.
Innovation Solution
A lighting device design featuring a base element and a light-guiding element with a chamber filled with inert gas, equipped with a sealing cap and a sensor for monitoring gas parameters, which ensures operational safety by preventing ignition and maintaining a controlled gas environment, and includes a metal-reinforced base element for improved heat dissipation and structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lighting device uses LED components in environments prone to fire and explosion risks, then the lighting functionality is provided, but the operational safety and reliability are insufficient due to potential ignition risks from electrical components
Solution Approach 1:
The patent applies the inert atmosphere principle by filling the chamber containing electrical components with inert gas (such as nitrogen, argon, or carbon dioxide). This creates a non-flammable environment that prevents ignition of any potential fuel sources, thereby eliminating the harmful ignition risk while maintaining LED lighting functionality in hazardous areas
Solution Approach 2:
The lighting device is segmented into a sealed chamber that isolates electrical components from the external environment. This segmentation creates a separate protected space where inert gas can be maintained, physically separating the potential ignition sources from the hazardous atmosphere outside the device
2Reliability
If a sealed chamber with inert gas is introduced to improve safety, then ignition risks are prevented, but the device complexity increases due to additional components like sealing caps and valves
Solution Approach 1:
The sealing cap serves multiple functions: it seals the chamber to maintain inert gas pressure, provides mounting points for electrical components, and includes integrated valves for gas pressure regulation. By combining multiple functions into a single component, the design reduces overall device complexity while maintaining safety requirements
3Reliability
If the chamber is sealed to maintain inert gas environment, then safety is improved, but the heat dissipation capability may be reduced due to restricted airflow
Solution Approach 1:
The patent uses forced convection through controlled gas flow within the sealed chamber. Fans or blowers circulate the inert gas to enhance heat transfer from LED components to heat sinks, while the pressure regulation valves maintain optimal gas pressure for efficient thermal management. This pneumatic system enables effective heat dissipation without compromising the sealed inert atmosphere
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 solution enhances operational safety and functionality by preventing ignition risks, maintaining a controlled gas environment, and effectively dissipating heat, making the lighting device suitable for use in hazardous areas.
Implementation Method 1
The concentration of the inert gas can be selected in such a way that the proportion of oxygen in the chamber, which originates from the air when the chamber of the lighting device is still open during construction, is very low. An oxygen concentration in the range from 0.01 to 0.5% by volume is preferred here.
Implementation Method 2
The above-mentioned inert gases are particularly advantageously suitable for extinguishing an ignition spark or arc that can emanate from the electrical components of the lighting device due to a malfunction of the lighting device
Implementation Method 3
The base element wall, which at least partially has a metal reinforcement, is particularly advantageously suitable for absorbing, forwarding and dissipating heat generated by the light-emitting diodes of the lighting device during operation.
Data Source
Figure 1
Figure 2~3
AI summary
The present invention relates to a lighting device (10) with a base element (11) and a light-guiding element (18) connected to the base element (18), wherein the lighting device (10) has at least one light-emitting diode (13), wherein at least one region (20) of the wall (19) of the light-guiding element (18) is transparent with an inner surface (21) facing the light-emitting diode (13), wherein at least one chamber (17', 17", 17'') is formed in the lighting device (10), wherein the at least one chamber (17', 17", 17'') is at least partially bounded by a base element wall (14), and wherein the at least one chamber (17', 17", 17'") contains an inert gas (40).