Electrolytic Cell Inverted Siphon Flashback Protection
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Solution Overview
Problem
Existing electrolytic cells for hydrogen production in motor vehicles face challenges such as mechanical stress, space constraints, and inefficiency across varying temperatures, requiring a flexible, compact design with few components that can reliably operate in these conditions.
Innovation Solution
The electrolytic cell design features a partitioned housing with separate electrode chambers, an inverted gas siphon for gas separation, and open or closed loop control to maintain electrolyte liquid levels, ensuring efficient hydrogen and oxygen production with separate gas outlets above the liquid level, eliminating the need for external gas scrubbers and reducing mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external gas scrubber vessel is used to protect against flashback, then safety is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent integrates the flashback protection function directly into the electrolytic cell housing by forming a gas bubble barrier within the electrolyte liquid, eliminating the need for a separate external gas scrubber vessel. The housing itself serves as the containment structure while the electrolyte provides the protective gas barrier, merging multiple functions into a single integrated system.
Solution Approach 2:
The patent removes the external gas scrubber vessel from the system and replaces it with an internal gas bubble barrier formed within the electrolyte liquid. This extraction of the external component simplifies the overall device structure while maintaining the essential flashback protection function through the inverted siphon mechanism that creates the gas barrier.
2Productivity
If liquid level is maintained below electrode housings, then gas separation efficiency is improved, but risk of flashback increases
Solution Approach 1:
The patent introduces an inverted siphon as an intermediary mechanism that extends the gas outlet below the electrolyte liquid level. This intermediary structure allows gas to be separated and removed efficiently while maintaining a liquid barrier that prevents flashback, resolving the contradiction between gas separation efficiency and flashback protection.
Solution Approach 2:
The patent inverts the traditional siphon configuration to create an inverted siphon where the outlet is positioned below the liquid level rather than above it. This inversion allows the gas outlet to extend into the electrolyte liquid, creating a gas bubble barrier that prevents flashback while maintaining efficient gas separation through the inverted siphon mechanism.
3Reliability
If electrolyte liquid level is maintained high, then flashback protection is improved, but gas separation efficiency decreases
Solution Approach 1:
The patent resolves the contradiction by transitioning from a two-dimensional liquid level control problem to a three-dimensional solution using the inverted siphon. The siphon extends vertically below the electrolyte level, creating a gas outlet path that maintains high liquid levels for flashback protection while enabling efficient gas separation through the extended outlet configuration.
4Volume of moving object
If compact design with few components is used, then space requirements are reduced, but adaptability to mechanical stresses and temperature variations worsens
Solution Approach 1:
The patent incorporates dynamic elements including a diaphragm that can move to accommodate pressure changes and thermal expansion, allowing the compact cell to adapt to mechanical stresses and temperature variations. The flexible diaphragm design enables the compact structure to respond dynamically to environmental conditions while maintaining its space-efficient configuration.
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 enhances the reliability and efficiency of hydrogen production in motor vehicles by maintaining electrolyte liquid levels, preventing flashback, and reducing component count, while ensuring compactness and adaptability to mechanical stresses and temperature variations.
Implementation Method 1
at least the first electrode housing is coupled at its uppermost portion to an inverted gas siphon having an outlet opening; where the open or closed loop control device is configured to regulate the amount of electrolyte liquid in the electrolytic cell housing so that the outlet opening of the inverted gas siphon is held completely below the liquid level of the electrolyte liquid
Implementation Method 2
electrolytic cells for electrolytic decomposition of water into gaseous hydrogen and oxygen
Data Source
AI summary
Electrolytic cells for electrolysis of water, the electrolytic cells including two sub-cells, one containing the anode, the other the cathode. The electrolytic cells are configured so that at least the hydrogen formed due to electrolysis is passed through a deflection tube and into an electrolyte outside of the electrolytic sub-cell. This configuration serves as a security measure to prevent a flashback of a combustion reaction, and makes the presence of a separate bubbler superfluous.