Portable Oxygen Concentrator Airflow Layout for Compact Cooling
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Solution Overview
Problem
Portable oxygen concentrators for personal use require a balance between compact size, efficiency, reliability, and affordability, with existing designs often compromising on one or more of these attributes.
Innovation Solution
The integration of sensor/accumulator assemblies, new muffler designs, and improved airflow and internal gas connectivity, including a pressure-sensitive gas valve with a porous housing and a compliant gas connection system, results in a compact, lightweight, and cost-effective portable oxygen concentrator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the concentrator size is reduced to make it portable, then portability is improved, but cooling efficiency deteriorates due to insufficient air intake
Solution Approach 1:
The air intake system is segmented into multiple pathways: a first air intake pathway dedicated to cooling the compressor and a second air intake pathway for the air mover, allowing independent optimization of each cooling zone within the compact housing
Solution Approach 2:
The exhaust airflow is utilized in a secondary cooling function by directing it through a heat exchanger to cool the compressor, creating a multi-dimensional cooling approach that maximizes thermal management within limited space
2Volume of moving object
If the concentrator is made compact, then portability is improved, but noise control becomes more difficult
Solution Approach 1:
The muffler is integrated within the exhaust housing structure, with the pressure-sensitive valve and porous material nested inside the exhaust pathway, allowing noise control functionality to be embedded within the compact exhaust system without increasing overall device volume
Solution Approach 2:
A pressure-sensitive valve dynamically adjusts the exhaust flow path based on operating conditions, directing flow through porous muffling material when needed while maintaining open pathways for optimal performance, enabling adaptive noise control in the compact design
3Ease of manufacture
If simpler components are used to reduce cost, then affordability is improved, but reliability deteriorates
Solution Approach 1:
The pressure-sensitive valve automatically regulates exhaust flow based on system pressure conditions without requiring external control systems, and the integrated sensor/accumulator assemblies perform multiple monitoring functions independently, reducing the need for additional active components while maintaining reliable operation
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 solution enables the creation of a reliable, efficient, and affordable portable oxygen concentrator that is easy to assemble, minimizing noise and vibration while providing effective oxygen delivery, thus addressing the need for a practical and user-friendly device for therapeutic oxygen supply.
Implementation Method 1
a housing made from a porous material holding the valve; wherein in the open position gas flow is substantially through an open portion of the valve, and in the closed position gas flow is directed substantially through the porous housing, muffling the sound produced by the flowing gas
Implementation Method 2
The air is moved through the system by at least one fan or blower; the discharge air of the air mover is directed over at least one air compressor element
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
Portable oxygen concentrator with a cooling system by air convection in which the ambient air intake is ducted to the exterior of the concentrator; the air is moved through the system by at least one fan or blower; the discharge air of the air mover is directed over at least one air compressor element; the discharge air of the air mover is directed to the intake port of at least one air compressor intake gas connection system; and, the cooling air discharge vent is integrated into at least one housing panel.