Oxygen Concentrator Timing Cycle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional oxygen concentrators face issues with compressor load at low oxygen flow rates, reduced oxygen purity at varying flow rates, and inefficiencies due to fixed cycle times that are not optimized for ambient conditions like temperature and pressure.
Innovation Solution
A control circuit with a microprocessor that adjusts the timing cycle of an oxygen concentrator based on user-adjustable flow rate, ambient temperature, and pressure, using sensors to optimize the adsorption process in sieve beds, thereby reducing compressor load and improving oxygen purity across all flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional control schemes use high pressure in molecular sieve beds at low oxygen flow rates, then oxygen production is maintained, but compressor load increases and service life decreases
Solution Approach 1:
The patent applies dynamics by transitioning from fixed preset cycle times to dynamically adjusted cycle times based on actual flow rate demands. The control system continuously monitors the required oxygen flow rate and adjusts the PSA cycle timing accordingly, allowing the system to adapt its operating parameters in real-time rather than following rigid predetermined cycles
Solution Approach 2:
The patent implements parameter changes by modifying the PSA cycle timing parameters (cycle time, pressurization time, depressurization time) based on the selected flow rate. The system uses different timing parameters for different flow rate ranges, optimizing the balance between oxygen production and compressor loading for each operating condition
2Ease of operation
If fixed preset cycle times are used for oxygen production, then control simplicity is maintained, but oxygen purity decreases at varying flow rates
Solution Approach 1:
The system maintains control simplicity through automated dynamic adjustment. Rather than requiring manual intervention or complex user input, the control system automatically selects and applies appropriate timing parameters based on the flow rate demand, achieving both simplicity and precision through intelligent automation
Solution Approach 2:
The patent employs feedback mechanisms where the control system monitors the actual flow rate requirements and uses this information to adjust the PSA cycle timing. This closed-loop approach ensures that the system maintains optimal oxygen purity by continuously adapting to changing operational conditions while keeping the user interface simple
3Device complexity
If fixed cycle times are used across all flow rates, then device complexity is reduced, but performance optimization at extreme flow rates deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the flow rate operating range into multiple segments or ranges, each with its own optimized timing parameters. This allows the system to use simpler fixed parameters within each segment while achieving overall optimization across the full range through the segmented approach
Solution Approach 2:
The control system achieves universality by implementing a single multi-functional controller that handles all flow rate ranges and ambient conditions. Rather than requiring separate control mechanisms for different operating conditions, one intelligent controller adapts to all scenarios, balancing complexity reduction with performance optimization
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 solution enhances oxygen purity, particularly at high and low flow rates, extends compressor reliability, and reduces maintenance costs by optimizing the cycling process for varying ambient conditions.
Implementation Method 1
one or more molecular sieve beds for concentrating oxygen
Implementation Method 2
A control circuit includes a microprocessor of a pressure-swing adsorption device that enriches a flow of a gas drawn from a mixture of gases
Data Source
AI summary
A control circuit of an oxygen concentrator maintains pressure within a compressor of the oxygen concentrator. The control circuit includes a microprocessor that controls functioning of a controller based on two or more of: a user-adjustable flow rate of oxygen delivered by the oxygen concentrator to a user, an ambient temperature, and an ambient pressure. The functioning of the controller further controls the adsorption of various gases by sieve beds of the oxygen concentrator to produce oxygen enriched gas.