Bubble CPAP Pressure Adjustment Preventing Contamination
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Solution Overview
Problem
Conventional pressure adjusting devices for artificial respiration systems expose tubes to the ambient environment when adjusting gas pressure, leading to contamination by dust and bacteria, which can pollute the liquid and endanger patient health.
Innovation Solution
A bubble continuous positive airway pressure device with a container, inner conduit, outer conduit, rack, gear, and knob design, where the outer conduit is slidably mounted around the inner conduit within a sealed space, allowing adjustment of gas pressure without exposing the outer conduit to the ambient environment, thus preventing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the tube is moved upward to decrease gas pressure, then the gas pressure in the pipeline is reduced, but the tube surface is exposed to the ambient environment allowing dust and bacteria to enter the liquid
Solution Approach 1:
The patent employs a nested structure where the inner conduit is placed inside the outer conduit, forming a protective enclosure. The outer conduit acts as a shield that prevents ambient contaminants from reaching the liquid in the container while the inner conduit remains functional for gas delivery. This nested configuration allows the system to maintain isolation between the sterile liquid environment and the non-sterile ambient environment throughout the adjustment process.
Solution Approach 2:
The patent introduces an intermediary sealed space between the inner conduit and outer conduit. This intermediate environment serves as a buffer zone that is isolated from both the ambient environment and the liquid container. The sealed space with its breathable membrane allows pressure transmission while maintaining physical separation, preventing direct contact between ambient contaminants and the liquid, thus solving the contradiction between pressure adjustment and contamination prevention.
2Stress or pressure
If the tube is moved downward to increase gas pressure, then the gas pressure in the pipeline is increased, but the tube surface is exposed to the ambient environment allowing dust and bacteria to pollute the liquid
Solution Approach 1:
The nested configuration of inner and outer conduits ensures that regardless of the adjustment direction (upward or downward), the inner conduit remains enclosed within the outer conduit. This protective enclosure prevents ambient dust and bacteria from contacting the liquid during any phase of the adjustment process, whether increasing or decreasing pressure.
Solution Approach 2:
The sealed intermediate space acts as a continuous mediator that maintains isolation between the adjustment mechanism and the liquid environment. During downward movement to increase pressure, this intermediary space ensures that the tube surface remains protected, preventing pollution while allowing the necessary pressure increase to occur.
3Ease of manufacture
If a conventional pressure adjusting device is used, then the structure is simple and easy to manufacture, but the liquid can be contaminated by dust and bacteria from the ambient environment
Solution Approach 1:
The patent maintains ease of manufacture by using a relatively simple nested structure consisting of an outer conduit, an inner conduit, and a breathable membrane. This configuration, while more complex than a single tube, still employs straightforward components that can be manufactured and assembled with standard techniques, achieving a balance between structural simplicity and contamination prevention.
Solution Approach 2:
The patent utilizes a breathable membrane as a thin film component that allows pressure transmission while providing biological filtration. This thin film structure is easy to integrate into the existing pressure adjustment mechanism and provides effective contamination prevention without significantly complicating the manufacturing process.
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 device effectively adjusts gas pressure in the artificial respiration system while preventing dust and bacteria from entering the liquid, ensuring patient health by maintaining a sterile environment within the device.
Implementation Method 1
By adjusting the depth of the outer conduit immersed in the liquid, the gas pressure in the pipeline is adjusted
Implementation Method 2
the gear drives the rack to move downward, the outer conduit slides downward in the inner space
Data Source
AI summary
A bubble continuous positive airway pressure device has a container having an inner space, an inner conduit mounted in the inner space for conducting an airflow, an outer conduit mounted around the inner conduit, a rack longitudinally mounted on the outer conduit, a gear disposed in the inner space and meshed with the rack, and a knobt. The inner conduit has an aperture. The outer conduit is longitudinally slidable relative to the inner conduit, and has at least one through hole connected with the aperture. The knob drives the gear to rotate and the gear drives the rack, so as to drive the outer conduit to slide downward or upward in the inner space. The bubble continuous positive airway pressure device prevents dust and bacteria in the ambient environment from polluting the liquid in the container when adjusting gas pressure, so as to ensure the patients' health.