Atmospheric Plasma Generator Electrode Cooling via Vortex Tube
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Solution Overview
Problem
Atmospheric pressure plasma generators face rapid electrode wear due to the high temperature of the processing gas during plasma generation, leading to shortened electrode lifespan.
Innovation Solution
The plasma generator incorporates a vortex tube to cool and heat the processing gas, using a vortex effect to efficiently manage the temperature of the plasma generating electrodes, preventing excessive heat generation and maintaining a stable temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high voltage electricity is applied to plasmarize processing gas, then plasma generation is achieved, but electrode wear increases and usage life shortens
Solution Approach 1:
The patent applies preliminary cooling action by introducing cooling gas through cooling gas supply holes in the electrode before plasma generation occurs. This pre-cooling prevents the electrode from reaching damaging temperatures during plasma operation, thereby extending electrode lifespan while maintaining plasma generation capability.
Solution Approach 2:
The patent introduces cooling gas as an intermediary substance that mediates between the high-temperature plasma environment and the electrode. The cooling gas flows through the electrode structure, absorbing heat and preventing direct thermal damage to the electrode material, thus resolving the contradiction between plasma generation and electrode durability.
2Temperature
If processing gas temperature is increased during plasma generation, then plasma effectiveness improves, but electrode temperature increases causing rapid wear
Solution Approach 1:
The patent segments the gas flow paths into separate channels: one for processing gas to maintain plasma temperature and another for cooling gas to protect the electrode. The cooling gas supply holes are distributed throughout the electrode structure, creating multiple localized cooling zones that effectively manage heat without interfering with plasma generation.
Solution Approach 2:
The patent applies local cooling quality by introducing cooling gas specifically at the electrode regions where heat generation occurs. The cooling gas supply holes are positioned to provide targeted cooling at the plasma generation site, maintaining local thermal balance without affecting the overall processing gas temperature needed for effective plasma.
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 solution effectively reduces electrode wear by maintaining a stable plasma temperature, thereby extending the usage life of the electrodes and ensuring consistent plasma processing.
Implementation Method 1
The plasma generator incorporates a vortex tube to cool and heat the processing gas, using a vortex effect to efficiently manage the temperature of the plasma generating electrodes
Implementation Method 2
The plasma generator incorporates a vortex tube to cool and heat the processing gas, using a vortex effect to efficiently manage the temperature of the plasma generating electrodes
Data Source
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AI summary
An atmospheric pressure plasma generator including: a housing; a first region provided in the housing; a gas heater that causes a heated first processing gas to flow into the first region; a second region provided in the housing adjacent to the first region; a gas cooler that causes a cooled second processing gas to flow into the second region; a plasma generating electrode provided in the second region; a plasma generator that plasmarizes the first processing gas present in the first region using the plasma generating electrode; and an outlet through which plasma gas plasmarized by the plasma generator is ejected.