Humidifier Partitioning for Pressure Support Therapy
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Solution Overview
Problem
Conventional pressure support systems face challenges in increasing liquid capacity, which leads to higher power consumption, longer initialization times, and reduced adjustability in humidity levels due to the need to heat larger water volumes in humidifiers.
Innovation Solution
A humidifier design with a holding chamber, a humidification chamber, and a partition that allows for controlled heating of liquid within the humidification chamber without significantly heating the holding chamber, enabling efficient humidification and reducing liquid levels in the humidification chamber through pressurization, allowing for enhanced liquid storage while minimizing power consumption and initialization time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the liquid capacity in the humidifier is increased, then the convenience and duration of therapy is improved, but the power consumption increases and the initialization time increases
Solution Approach 1:
The humidifier is divided into two separate chambers: a holding chamber for storing liquid and a humidification chamber for active humidification. This segmentation allows the system to maintain a large total liquid capacity in the holding chamber while only heating a small volume in the humidification chamber, thus resolving the contradiction between large liquid capacity and low power consumption
Solution Approach 2:
A partition with an opening acts as an intermediary structure between the holding chamber and humidification chamber. This partition enables liquid to be transferred from the holding chamber to the humidification chamber while maintaining thermal isolation, allowing the system to benefit from both large storage capacity and efficient heating of small volumes
2Quantity of substance
If the liquid capacity in the humidifier is increased, then the convenience and duration of therapy is improved, but the initialization time increases
Solution Approach 1:
By segmenting the humidifier into holding and humidification chambers, the system can store large amounts of liquid in advance without requiring all of it to be heated during initialization. Only the small volume in the humidification chamber needs to reach operating temperature quickly, while the holding chamber serves as a pre-filled reservoir
Solution Approach 2:
The holding chamber is designed to be pre-filled with liquid before therapy begins. This preliminary action ensures that when therapy starts, liquid is already available in the holding chamber and can be quickly transferred to the humidification chamber, reducing initialization time while maintaining large total capacity
3Quantity of substance
If the liquid capacity in the humidifier is increased, then the convenience and duration of therapy is improved, but the adjustability of humidity levels is reduced
Solution Approach 1:
The segmentation into holding and humidification chambers allows independent control of liquid supply (holding chamber) and humidification process (humidification chamber). The partition with its controlled opening enables regulation of liquid flow from holding to humidification chamber, providing adjustability despite large total capacity
Solution Approach 2:
The system incorporates dynamic control capabilities where the partition opening and liquid transfer between chambers can be adjusted during therapy. This allows the system to adapt humidity levels dynamically while maintaining a large total liquid capacity for extended therapy duration
4Productivity
If the heating element heats the liquid in the humidification chamber, then the humidification efficiency is improved, but the temperature of the holding chamber liquid increases reducing energy efficiency
Solution Approach 1:
The heating function is extracted and localized to only the humidification chamber, separate from the holding chamber. The partition with its opening allows liquid transfer but prevents significant thermal energy transfer, so heating the humidification chamber liquid does not substantially heat the holding chamber liquid, eliminating wasted energy heating
Solution Approach 2:
The partition acts as a thermal intermediary that separates the heated humidification chamber from the unheated holding chamber. This intermediary structure allows liquid to pass through while blocking thermal energy transfer, enabling efficient heating of only the required liquid volume without wasting energy heating the entire liquid supply
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
This design allows for a larger liquid capacity while reducing power consumption and initialization time, maintaining efficient humidity control and adjustability, thus overcoming the limitations of conventional systems.
Implementation Method 1
The heating element is configured to controllably elevate the temperature of fluid within the humidification chamber to heat liquid within the humidification chamber
Implementation Method 2
the partition and liquid held in the humidification chamber isolate the flow path formed by humidification chamber from the holding chamber causing the flow of gas through the humidification chamber to result in pressurization of the humidification chamber that reduces the level of liquid within the humidification chamber
Implementation Method 3
such that the gas flowing through the humidification chamber from the gas inlet to the gas outlet is humidified by the heated liquid
Data Source
Figure 1
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Figure 4
AI summary
A pressure support system configured to provide pressure support therapy includes a humidifier that holds an enhanced amount of liquid while enhancing the power consumption of the pressure support system and enabling relatively rapid adjustments to humidity level. The humidifier includes a humidification chamber and a holding chamber, and a partition that divides the holding chamber from the humidification chamber such that liquid from the holding chamber replenishes liquid held in the humidification chamber. The partition, however, also provides a level of thermal isolation for the humidification chamber from the holding chamber.