Compact Water Electrolyzer with Air Dilution for Safe Hydrogen Generation
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Solution Overview
Problem
Conventional water electrolysis devices are bulky, making it difficult to inhale hydrogen gas during daily activities, and pose risks due to high temperatures and electrolyte contamination, with potential for gas explosions if cooling fails.
Innovation Solution
A compact water electrolysis device with an ion-exchange membrane electrolyzer that outputs hydrogen and oxygen gases from the same side, incorporating an air pump to dilute hydrogen concentration, a hydrogen concentration detector for safety, and a design that allows for efficient space use and low noise operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional water electrolysis devices are used, then hydrogen gas can be generated, but the device volume is large making it difficult to use during daily activities
Solution Approach 1:
The device is divided into separate functional modules: electrolyzer unit, water tank, air pump, and control system. This segmentation allows for compact arrangement of components while maintaining efficient hydrogen production capability.
Solution Approach 2:
The air pump is integrated within the housing structure, and the water tank is positioned to optimize space utilization. Components are nested arrangement to minimize overall device volume while preserving functional performance.
2Reliability
If traditional hydrogen-oxygen electrolyzer is used, then hydrogen gas can be generated, but high temperature causes gas explosion risk
Solution Approach 1:
An ion-exchange membrane is introduced as an intermediary between the anode and cathode compartments. This membrane selectively transports ions while preventing direct contact between hydrogen and oxygen gases, eliminating explosion risk even at elevated temperatures.
Solution Approach 2:
The harmful factor (direct mixing of hydrogen and oxygen) is extracted from the system by using separate compartments divided by the ion-exchange membrane, allowing safe operation at higher temperatures.
3Reliability
If air pump is added to dilute hydrogen concentration, then safety is improved, but device complexity increases
Solution Approach 1:
The air pump serves multiple functions: it supplies air to dilute hydrogen concentration for safe inhalation, and simultaneously provides cooling air to the electrolyzer. This multi-functionality reduces overall device complexity despite the addition of the air pump.
Solution Approach 2:
The air supply function and cooling function are merged into a single air pump system, reducing the number of components and simplifying the device structure while achieving both safety and thermal management.
4Productivity
If electrolyte is used in electrolysis process, then hydrogen gas can be generated, but electrolyte contamination makes gas unsuitable for inhalation
Solution Approach 1:
The ion-exchange membrane acts as an intermediary that allows ion transport for electrolysis while blocking electrolyte contamination from reaching the gas collection chamber, producing clean hydrogen suitable for inhalation.
Solution Approach 2:
The electrolyte is extracted from the gas generation pathway by using separate compartments, allowing hydrogen to be generated in one compartment while the other compartment receives clean air for dilution, eliminating contamination.
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 device achieves efficient hydrogen production in a small volume, ensuring safety by controlling hydrogen concentration and reducing noise, allowing for safe and convenient use, including during sleep.
Implementation Method 1
The electrolyzer includes a cathode. The cathode generates the hydrogen gas while the electrolyzer electrolyzes water.
Implementation Method 2
The air pump draws air and is connected with the air supplying tube through an air supplying interface to dilute a hydrogen concentration in the air supplying tube.
Implementation Method 3
A lead angle is formed on a connecting position between the air supplying interface and the air supplying tube to guide the air from the duct into the air supplying tube.
Data Source
AI summary
A water electrolysis device includes a membrane electrolyzer, an air supplying tube, and an air pump. The electrolyzer includes an ion-exchange membrane and a cathode chamber. A cathode electrode is configured in the cathode chamber. The cathode generates hydrogen gas while the electrolyzer electrolyzes water. The air pump draws air and is connected with the air supplying tube by a duct. A lead angle is formed between the duct and the air supplying tube for guiding the air from the duct into the air supplying tube to dilute the hydrogen concentration in the air supplying tube. The volume of the water electrolysis device is 8.5 liters, and the hydrogen gas generating rate of the water electrolysis device is located in a range between 120 ml/min and 600 ml/min.