Rotatable Leakage Valve Housing for Stable Ventilation Flow
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Solution Overview
Problem
Existing leakage valves in ventilation systems experience fluctuations in leakage quantity due to mechanical impairments and torsional loads, which can lead to unwanted ventilation impairments, particularly in sensitive cases like newborn ventilation.
Innovation Solution
The leakage valve design allows the two housing parts to rotate relative to each other, featuring gap clearances and radially extending webs to facilitate easy rotation without mechanical stress, ensuring a stable leakage flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the two housing parts are rigidly connected to prevent rotation, then mechanical stability is improved, but the valve becomes sensitive to torsional loads and mechanical impairments causing fluctuations in leakage quantity
Solution Approach 1:
The housing parts are designed with relative rotatability, allowing the valve to dynamically adapt to torsional loads rather than resisting them rigidly. This dynamic design prevents mechanical impairments while maintaining mechanical stability through the controlled rotational movement capability.
2Stability of the object's composition
If the housing parts are designed with tight tolerances to prevent rotation, then connection stability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of using tight tolerances to prevent rotation, the invention deliberately designs the housing parts with clearance that allows controlled rotation. This approach significantly reduces manufacturing tolerance requirements while maintaining connection stability through the snap connection mechanism and overall structural design.
3Reliability
If the housing parts are designed to rotate relative to each other, then resistance to mechanical impairments is improved, but connection stability may be compromised
Solution Approach 1:
The housing parts are designed with relative rotatability through clearance between connection elements, allowing the valve to accommodate torsional loads and mechanical impairments. The snap connection mechanism maintains overall connection stability while permitting this controlled rotational movement, resolving the contradiction between stability and mechanical resilience.
Data Source
AI summary
A leakage valve in a patient ventilation system has a valve housing constructed from a first and second housing parts. The housing parts form a fluid channel with a circular cross-section. The valve housing has first and second connection pieces on the corresponding housing parts. A housing region between the connection pieces projects radially outward. An opening is at the height of the outwardly projecting housing region and enables fluid to pass as a leakage flow. A leakage channel for flow from the leakage valve circulates around part of the valve housing is formed by both housing parts. A catch mechanism includes catch lugs with an end-side detent follow the connection piece and axially engage an outer side of the connection piece. Wall regions between the catch lugs curve along and contact the connection piece inner surface. The housing parts rotate relative to one another in an engaged state.