Portable Oxygen Concentrator Using APSA Dual-Column Pressure Cycling
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Solution Overview
Problem
Current portable oxygen concentrators are bulky, heavy, and inefficient, requiring increased power and components to achieve sufficient oxygen output, which limits their mobility and increases user cost.
Innovation Solution
A portable oxygen concentrator using Absolute Pressure Swing Adsorption (APSA) technology with dual columns and a controller, utilizing smaller zeolite particles and miniature pumps to achieve higher oxygen recovery and efficiency, allowing for a compact, lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional portable oxygen concentrators use larger components and higher power to achieve sufficient oxygen output, then oxygen delivery capability is improved, but device weight and bulkiness increase
Solution Approach 1:
The patent changes the operating parameters of the oxygen concentrator by implementing Absolute Pressure Swing Adsorption (APSA) technology, which operates at absolute pressures rather than gauge pressures. This parameter change allows for more efficient oxygen separation and recovery, achieving sufficient oxygen output with smaller, lighter components. The APSA process enables higher oxygen recovery rates by maintaining consistent pressure differentials across the adsorbent beds, thereby reducing the need for oversized pumps and components.
Solution Approach 2:
The patent employs composite adsorbent materials in the PSA columns that combine multiple functional properties. These composite materials provide both high oxygen selectivity and structural stability, allowing for compact column designs that deliver adequate oxygen output without requiring large volumes or heavy construction. The use of optimized adsorbent composites enables efficient oxygen recovery in a reduced footprint.
2Productivity
If traditional portable oxygen concentrators use larger components to achieve sufficient oxygen output, then oxygen delivery capability is improved, but device complexity increases
Solution Approach 1:
The patent divides the oxygen generation function into two independent columns operating in alternating cycles. Each column performs a simplified function (adsorption or desorption), and the system uses sequential operation rather than complex continuous processing. This segmentation allows each component to be optimized for its specific function, reducing overall system complexity while maintaining adequate oxygen output.
Solution Approach 2:
The patent implements periodic switching between two columns, where one column generates oxygen while the other regenerates. This periodic action converts a potentially complex continuous process into simpler discrete cycles, reducing the need for complex control mechanisms and enabling the use of smaller, less complex components while maintaining sufficient oxygen delivery capability.
3Productivity
If traditional portable oxygen concentrators use higher power to achieve sufficient oxygen output, then oxygen delivery capability is improved, but power consumption increases
Solution Approach 1:
The patent changes the pressure operating parameters to absolute pressure differentials, which optimizes the adsorption-desorption efficiency of the PSA process. This parameter optimization allows the system to achieve higher oxygen recovery rates with lower pump power requirements. The APSA technology maintains consistent pressure differentials that maximize oxygen separation efficiency, reducing the energy needed per unit of oxygen produced.
Solution Approach 2:
The patent ensures continuous oxygen production through alternating columns, where one column is always in the oxygen generation phase while the other regenerates. This continuity eliminates idle periods and maintains constant useful output, optimizing power utilization. The seamless transition between columns ensures that power is consistently used for productive purposes, improving overall energy efficiency while maintaining adequate oxygen delivery.
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 APSA system achieves up to 59% higher oxygen recovery and a cycle time of 9.4 seconds, enabling a compact, efficient, and cost-effective oxygen supply suitable for ambulatory and emergency use.
Implementation Method 1
portable oxygen concentrators using a pressure swing absorption process
Implementation Method 2
the first column and the second column may include an adsorbent
Data Source
AI summary
A handheld portable oxygen concentrator device is disclosed. The device may comprise a first column and a second column, a product buffer, a plurality of valves in fluidly coupling the first column, the second column, the one or more pumps, and the product buffer. The device may comprise a controller configured to cycle repeatedly through the following phases: (a) raising pressure in the first column by connecting the first column to a positive pressure pump and releasing concentrated oxygen in the first column to the product buffer, (b) equalizing the pressure in the first column and the second column by connecting the first column to the second column, (c) lowering the pressure in the first column by connecting the first column to a negative pressure pump, and (d) equalizing the pressure in the first column and the second column by connecting the first column to the second column.