Partitioned Respiratory Vent Structure for Quiet CO2 Washout
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Solution Overview
Problem
Existing respiratory therapy systems face challenges such as discomfort, poor fit, noise, and reduced compliance due to noisy vents and disruptive air jets, which affect the efficacy of treatments for respiratory disorders.
Innovation Solution
A vent structure with specific partitioned slots and deflectors designed to reduce noise and minimize disruptive air jets, along with a patient interface that maintains therapeutic pressure and allows ambient breathing, enhancing comfort and compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vent is provided in the air circuit to allow exhaled gas to escape, then the vent prevents rebreathing of exhaled CO2, but the vent generates noise and disruptive air jets that reduce patient comfort and compliance
Solution Approach 1:
The vent is divided into multiple partitions that create separate slots for air flow. This segmentation allows the exhaled gas to escape through multiple smaller pathways rather than a single large opening, reducing the noise and disruptive air jets while maintaining effective CO2 washout functionality
Solution Approach 2:
Deflectors are introduced as intermediary elements within the vent structure. These deflectors modify the air flow pattern by redirecting the exhaled gas in a controlled manner, reducing the directness and disruptiveness of the air jets while maintaining the vent's primary function of preventing CO2 rebreathing
2Productivity
If the vent allows free escape of exhaled air, then CO2 washout is effective, but the air flow creates noise and disturbance that affects patient compliance
Solution Approach 1:
By segmenting the vent into multiple partitions with separate slots, the system maintains effective CO2 washout through multiple flow pathways while reducing the noise and disruption associated with single large openings, thereby improving patient compliance
Solution Approach 2:
The vent structure modifies the physical parameters of air flow by changing the flow distribution across multiple slots and using deflectors to alter flow direction. This changes the flow characteristics from high-velocity direct jets to more distributed and controlled flow patterns, reducing noise and disturbance while maintaining washout efficiency
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 vent structure significantly reduces noise and disruptive air jets, improving patient comfort and compliance with respiratory therapy, thereby enhancing the effectiveness of treatments for respiratory disorders.
Implementation Method 1
the second region is proximate to a region where flow separation is likely to occur
Data Source
AI summary
The invention relates to a vent structure for a respiratory therapy system. In one form the vent structure comprises a vent housing, and a plurality of partitions inside the vent housing forming therebetween a plurality of vent slots. The vent slots comprise a vent inlet configured to receive an air flow, and a vent outlet configured to allow the air flow to exit into the surrounding ambient air. The partitions may be formed such that each vent slot has a smaller cross-sectional area at a first region closer to the vent inlet than a second region. The vent structure may comprise a plurality of deflectors configured to deflect the air flow through each vent slot towards a part of the vent housing and/or another component in the respiratory system. The vent structure may comprise a projecting portion extending outwardly from the vent outlet to inhibit generation of flow layer instabilities.