Breathing Circuit Membrane Design for Condensation and Noise Control
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Solution Overview
Problem
Existing breathing gas conduits in respiratory apparatus face issues with condensation buildup due to high humidity, leading to durability concerns and unwanted noise, especially when moved or bent, and are difficult to make patient-friendly.
Innovation Solution
A breathing circuit component with a breathable membrane that allows vapor passage while preventing liquid water and gas flow, reinforced by a helical bead or rib structure, providing enhanced durability and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a thin breathable membrane is used to reduce condensation, then condensation control is improved, but durability and resistance to damage deteriorate
Solution Approach 1:
The patent employs a thin breathable membrane (35-45 micrometers) as a flexible shell that allows water vapor transmission while blocking liquid water. This thin film structure effectively prevents condensation buildup by enabling vapor to escape through the membrane, while the membrane's material properties maintain structural integrity and durability for reliable long-term use.
2Object-affected harmful factors
If a thin breathable membrane is used to reduce condensation, then condensation control is improved, but noise during movement deteriorates
Solution Approach 1:
The patent employs a thin breathable membrane (35-45 micrometers) as a flexible shell that allows water vapor transmission while blocking liquid water. This thin film structure effectively prevents condensation buildup by enabling vapor to escape through the membrane, while the membrane's material properties maintain structural integrity and durability for reliable long-term use.
Solution Approach 2:
The patent specifies a precise thickness range of 35-45 micrometers for the breathable membrane. This parameter optimization balances multiple properties: thin enough to allow effective vapor transmission for condensation control, but thick enough to reduce flexibility-induced crinkling noise during movement, and sufficient to maintain durability against damage.
3Reliability
If membrane thickness is increased to improve durability, then durability is improved, but vapor permeability deteriorates
Solution Approach 1:
The patent specifies a precise thickness range of 35-45 micrometers for the breathable membrane. This parameter optimization balances multiple properties: thin enough to allow effective vapor transmission for condensation control, but thick enough to reduce flexibility-induced crinkling noise during movement, and sufficient to maintain durability against damage.
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 effectively reduces condensation buildup and noise, enhances durability, and improves patient acceptance by ensuring comfortable and reliable use.
Implementation Method 1
a breathable material that allows the passage of water vapour from the gases passageway, without substantially allowing the passage of liquid water or respiratory gases
Implementation Method 2
Buildup of condensation on the inside wall of the breathing gas conduit is a frequent result of this high humidity
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
In one embodiment, a breathing circuit component is provided and comprises: an inlet; an outlet; and an enclosing wall defining a gases passageway between the inlet and the outlet, at least a region of the wall comprising a membrane that allows the passage of water vapour without substantially allowing the passage of liquid water or respiratory gases, wherein, said membrane has a thickness of about 35 to 45 micrometers.