Oxygen Concentrator Flow Restricted Canisters
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Solution Overview
Problem
Existing oxygen concentrators are bulky, heavy, and impractical for ambulatory use due to their size and weight, and they often require continuous operation regardless of the user's breathing rate, with limited sensor capabilities to detect oxygen flow issues.
Innovation Solution
The oxygen concentrator integrates injection molded plastic components with zeolite canisters, dual-pump diaphragm compressors, and advanced sensors like pressure transducers and ultrasonic sensors to adjust compressor power based on breathing rate and detect oxygen concentration, featuring a dual lumen delivery system and energy-saving two-step valve actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional oxygen concentrators use bulky compressors and canisters to ensure sufficient oxygen supply, then oxygen delivery reliability is improved, but device portability and ease of ambulatory use deteriorates
Solution Approach 1:
The oxygen concentrator is divided into separate functional modules: a lightweight compressor unit, interchangeable canister units with zeolite granules, and a delivery system. This segmentation allows the device to be more portable while maintaining reliability through modular oxygen generation and storage capabilities.
Solution Approach 2:
The system dynamically adjusts compressor operating parameters (speed, power consumption) based on real-time oxygen demand detection. The canister pressure and oxygen concentration are continuously monitored and adjusted to optimize both portability and oxygen delivery reliability under varying usage conditions.
2Reliability
If the compressor operates at high power continuously to meet peak oxygen demands, then oxygen supply reliability is improved, but energy consumption increases
Solution Approach 1:
The compressor operates dynamically rather than statically, adjusting its power output in real-time based on detected oxygen demand. During low-demand periods, the compressor reduces power consumption while maintaining readiness. During peak demand, it increases power output to ensure reliable oxygen supply, optimizing the balance between energy efficiency and reliability.
Solution Approach 2:
The system incorporates sensors that continuously monitor oxygen concentration, canister pressure, and user breathing patterns to provide feedback to the compressor control system. This feedback mechanism ensures the compressor operates at optimal power levels to meet actual oxygen demands, preventing unnecessary energy consumption while maintaining supply reliability.
3Device complexity
If the oxygen concentrator uses basic sensors to detect oxygen flow, then device complexity is reduced, but measurement precision and monitoring accuracy deteriorates
Solution Approach 1:
The sensor system is designed with multi-functionality, where a single integrated sensor array performs multiple measurements including oxygen concentration detection, flow rate monitoring, pressure sensing, and breathing pattern recognition. This universal sensor approach maintains measurement precision across multiple parameters while avoiding the need for separate specialized sensors for each function.
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 design results in a more portable, efficient oxygen delivery system that conserves energy by adjusting compressor power according to user needs and provides accurate oxygen flow monitoring, ensuring reliable supplemental oxygen supply.
Implementation Method 1
Oxygen concentrators may take advantage of pressure swing absorption. Pressure swing absorption may involve using a compressor to increase air pressure inside a canister that contains granules of a micro-porous mineral. As the pressure increases, certain air molecules may become smaller and may be absorbed into the micro-pores of the granules.
Implementation Method 2
As the pressure increases, certain air molecules may become smaller and may be absorbed into the micro-pores of the granules. An example of such a granule is found in certain volcanic ash. Synthetic granules (e.g., zeolite) may also be available in various granule and pore sizes.
Implementation Method 3
Pressure swing absorption may involve using a compressor to increase air pressure inside a canister that contains granules of a micro-porous mineral.
Implementation Method 4
A pressure transducer, coupled to the oxygen concentrator, may be used to detect a change in pressure corresponding to a start of a user's breath.
Implementation Method 5
An ultrasonic sensor may be used to measure an oxygen level or the percent oxygen in a gas mixture being delivered to a user.
Data Source
AI summary
An oxygen concentrator may rely on a pressure swing adsorption process to produce an oxygen enriched gas stream from canisters filled with granules capable of separation of oxygen from an air stream. The adsorption process uses a cyclical pressurization and venting of the canisters to generate an oxygen enriched gas stream. The oxygen concentrator system may include one or more flow restrictors to allow controlled release of oxygen enriched gas between the canisters.