UV Lamp Filament Current Control for Amalgam Temperature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ultraviolet radiation lamps for fluid treatment systems face inefficiencies due to temperature variations in the mercury reservoir, requiring additional components for heat management, which complicates maintaining optimal mercury vapor pressure and affects treatment efficacy.
Innovation Solution
The ultraviolet radiation lamp employs active temperature control by modulating the current applied to the filament to maintain optimal amalgam/mercury temperature, eliminating the need for external heating or cooling elements and allowing operation at optimal efficiency across varying power levels and fluid temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive heat absorbing elements are used to maintain cold portion temperature, then UV radiation efficiency is improved, but device complexity increases due to additional external components
Solution Approach 1:
The patent merges the filament's primary function (electron emission) with a secondary function (heating the amalgam) by controlling the current through the filament. This eliminates the need for separate heating elements and integrates temperature control into the existing filament structure, thereby reducing device complexity while maintaining UV radiation efficiency
Solution Approach 2:
The filament is designed to serve multiple purposes: generating electrons for UV radiation and simultaneously heating the amalgam to maintain optimal temperature. This multi-functionality removes the need for dedicated heating components, simplifying the overall device structure
2Temperature
If external heaters or coolers are used to control amalgam temperature, then temperature control precision is improved, but device complexity and power requirements increase
Solution Approach 1:
The system uses the filament's own current to heat the amalgam, making the heating function self-contained within the existing electrical circuit. No external heaters or coolers are needed, and the current control simultaneously manages both electron emission and temperature regulation
Solution Approach 2:
By adjusting the current parameter through the filament, the system dynamically controls the amalgam temperature. This single parameter change achieves both electron emission control and thermal management, eliminating the need for separate temperature control mechanisms
3Temperature
If current through filament is increased to heat amalgam, then amalgam temperature is improved, but filament life decreases due to overheating
Solution Approach 1:
The system incorporates temperature sensing (via thermocouple or RTD) that provides feedback on amalgam temperature. This feedback loop allows the control system to adjust the filament current to maintain optimal amalgam temperature without exceeding thresholds that would damage the filament, thereby extending filament life while maintaining effective heating
Solution Approach 2:
The filament current is dynamically adjusted based on real-time temperature conditions rather than being fixed. This dynamic control allows the system to optimize heating efficiency while preventing excessive temperature that would reduce filament lifespan
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 approach optimizes mercury pressure and lamp efficiency, reduces operational costs, and maintains performance independently of fluid temperature and power settings, enhancing the reliability and cost-effectiveness of UV disinfection systems.
Implementation Method 1
modulating a current through the filament to apply heat to the mercury-containing material
Implementation Method 2
employ an ultraviolet radiation lamp to emit radiation of a particular wavelength or range of wavelengths (usually between 185 and 400 nm) to effect bacterial kill or other treatment of the fluid being treated
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to an ultraviolet radiation lamp. The lamp comprises a substantially sealed cavity comprising a mercury-containing material; a filament disposed in the sealed cavity; and an electrical control element in contact with the filament, the electrical control element configured to adjust or maintain a temperature of the mercury-containing material with respect to a prescribed temperature. Such a constructions allows the present ultraviolet radiation lamp to be operated at optimal efficiency without the need to use additional components to add heat to and/or remove heat from the mercury-containing material.