Respiratory Vent Curved Flow Path Noise Reduction
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Solution Overview
Problem
Current respiratory therapy devices, particularly masks, are often uncomfortable, difficult to use, and aesthetically unappealing, leading to reduced patient compliance due to issues with fit, noise, and ease of cleaning, which can impact the effectiveness of treatments for respiratory disorders like Obstructive Sleep Apnea and Chronic Obstructive Pulmonary Disease.
Innovation Solution
A respiratory therapy system with a vent structure that includes a curved turning region in the flow path to reduce noise and improve airflow, combined with a patient interface that maintains therapeutic pressure and allows for easy cleaning, designed to enhance comfort and usability, particularly for use during sleep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vent structure with curved turning region is added to reduce noise, then noise level is reduced, but device complexity increases
Solution Approach 1:
The vent structure incorporates a curved turning region instead of sharp angles, creating a smooth flow path that reduces turbulence and noise. The curved geometry allows air to change direction gradually, minimizing eddy formation and acoustic disturbances while maintaining a relatively simple overall vent design.
2Reliability
If the flow path width is optimized to prevent water droplet blocking, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The flow path width is specifically optimized to a minimum of 0.85mm, which is sufficiently large to prevent water droplet blocking while remaining manufacturable. This parameter optimization balances reliability (preventing blockages) with manufacturing feasibility, avoiding excessively tight tolerances that would increase production complexity and cost.
3Reliability
If a seal-forming structure is used to maintain therapeutic pressure, then treatment effectiveness is improved, but ease of cleaning deteriorates
Solution Approach 1:
The patient interface is divided into separable components, including the seal-forming structure that can be removed for cleaning. This segmentation allows the seal-forming structure to maintain therapeutic pressure when assembled while being easily detachable for washing, thus resolving the contradiction between pressure maintenance and cleaning ease.
4Object-affected harmful factors
If the vent flow path is lengthened to reduce noise, then noise level is reduced, but loss of time for air flow increases
Solution Approach 1:
The curved turning region provides an extended flow path that reduces noise through gradual direction changes and turbulence minimization. The curved geometry efficiently manages air flow velocity and direction, reducing noise without creating excessive flow resistance or time delays that would significantly impact breathing cycle timing.
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 system improves patient compliance by reducing noise and discomfort, maintaining therapeutic pressure, and facilitating easier cleaning, thereby enhancing the effectiveness of respiratory therapies.
Implementation Method 1
the flow path comprises a curved turning region in which the flow path changes direction
Data Source
AI summary
This invention relates to a vent structure for a respiratory therapy system. In one form the vent structure comprises a vent housing. The vent housing may define a flow path for a flow of air being vented from the respiratory therapy system, a vent inlet configured to allow the flow of air to enter the flow path, and a vent outlet configured to allow the flow of air to exit the flow path into the surrounding ambient air. The vent housing may be configured so that the flow path comprises a curved turning region in which the flow path changes direction by at least 90°. The vent housing may comprise an inner path surface on an inner side of the flow path and an outer path surface on an outer side of the flow path. The width of the flow path at the turning region and at a region downstream of the turning region may be at least substantially 0.85 mm. An opening angle between the inner path surface of the vent housing at the vent outlet and the outer path surface of the vent housing at the vent outlet may be substantially 7° or less.