Pressure Compensating Device Diaphragm Flow Control
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Solution Overview
Problem
Existing IV therapy administration systems face challenges in maintaining a consistent flow rate due to variations in fluid pressure, which are unpredictable and difficult to manage, leading to unwanted changes in the delivery rate of IV solutions.
Innovation Solution
A pressure compensating device is introduced, comprising a housing and a compensating disc with a diaphragm that flexes in response to changes in fluid pressure, adjusting the outlet port size to maintain a predetermined flow rate by aligning the flex point with the central axis of the outlet port, thus compensating for variations in fluid head pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pinch valve or roller clamp is used to control IV solution flow rate, then the flow rate can be adjusted, but substantial deviations in flow rate occur due to pressure variations
Solution Approach 1:
The compensating disc is designed to dynamically adjust the outlet port opening size in response to changing fluid pressure conditions. As pressure varies during IV therapy, the flexible disc automatically modulates the flow passage area, maintaining consistent flow rate without requiring manual adjustment of a fixed valve mechanism.
Solution Approach 2:
The invention changes the physical state of the outlet port by using a flexible compensating disc that varies its deformation state based on pressure conditions. The disc transitions between different degrees of flexing, thereby continuously adjusting the effective opening area to compensate for pressure-driven flow rate variations.
2Duration of action of moving object
If the IV bag volume is reduced during therapy, then the treatment progresses, but the head pressure decreases causing flow rate to slow
Solution Approach 1:
The compensating disc acts as a passive feedback mechanism that automatically responds to pressure changes resulting from volume reduction. As the IV bag empties and pressure drops, the disc flexes to increase the outlet opening, creating a self-regulating system that maintains flow rate throughout the entire duration of therapy without external intervention.
Solution Approach 2:
The device performs flow rate compensation automatically based on inherent pressure changes during therapy progression. The compensating disc self-adjusts the outlet port opening in response to the natural pressure decay that occurs as IV solution volume decreases, eliminating the need for manual valve adjustments by healthcare providers.
3Adaptability or versatility
If the IV bag elevation changes or patient limb moves, then positioning flexibility is improved, but flow rate becomes unpredictable due to pressure head variations
Solution Approach 1:
The invention dynamically changes the outlet port geometric parameters through disc flexing in response to pressure variations caused by elevation changes or patient movement. This automatic parameter adjustment compensates for Bernoulli effect-induced flow rate changes, maintaining predictable delivery rates regardless of positioning flexibility.
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 stabilizes the flow rate of IV solutions by flexing the diaphragm in response to pressure changes, ensuring a consistent delivery despite reductions in IV solution volume or changes in elevation, thereby maintaining a predetermined flow rate throughout IV therapy.
Implementation Method 1
a compensating disc with a diaphragm that flexes in response to changes in fluid pressure
Data Source
AI summary
A pressure compensating device includes a compensating disc located within an internal chamber of a housing. The compensating disc has a diaphragm over which fluid passes after entering the internal chamber. The diaphragm deflects in response to a pressure differential between fluid entering the internal chamber and fluid exiting the internal chamber to maintain the set flow rate of the fluid.