Gravity-Fed Fluid Separator for Pump Cavitation Prevention
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Solution Overview
Problem
Existing cooling and heating systems for body parts, such as the head and neck, face challenges in efficiently managing fluid flow and temperature regulation, particularly in preventing air bubbles from entering the pump and ensuring proper priming, which can lead to inefficiencies and increased energy consumption.
Innovation Solution
A system comprising a bladder, a pump, a heat exchanger, and a separator with a main reservoir, where the separator is positioned below the main reservoir to facilitate gravity-driven fluid flow and includes a volumetric space to allow air bubbles to migrate away from the pump, reducing the risk of cavitation and priming issues, and a closed circuit design that minimizes energy usage by only cooling/heating the fluid required for the bladder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pump is used to circulate cooling or heating fluid through the bladder, then fluid circulation is achieved, but air bubbles may enter the pump causing cavitation and priming issues
Solution Approach 1:
A separator is introduced as an intermediary component between the reservoir and the pump. This separator contains a volumetric space that allows air bubbles to migrate and collect away from the pump inlet, preventing them from entering the pump and causing cavitation or priming issues while maintaining fluid circulation reliability
Solution Approach 2:
The fluid path is segmented into distinct zones: the reservoir, the separator with its volumetric space for air bubble collection, and the pump inlet. This segmentation allows air bubbles to be separated from the main fluid flow path before reaching the pump, resolving the contradiction between achieving fluid circulation and preventing air bubble entry
2Ease of operation
If a reservoir is positioned above the pump to enable gravity-driven fluid flow, then pump priming is facilitated, but air bubbles may accumulate in the reservoir and enter the system
Solution Approach 1:
The separator acts as an intermediary between the reservoir and the pump, providing a volumetric space that intercepts and collects air bubbles before they can enter the pump. This maintains the beneficial gravity-driven flow from the elevated reservoir while eliminating the harmful effect of air bubble accumulation
Solution Approach 2:
The separator extracts and isolates air bubbles from the main fluid flow path. By providing a dedicated volumetric space within the separator, air bubbles are taken out of the circulation path and collected separately, preventing them from entering the pump while maintaining continuous fluid circulation
3Use of energy by moving object
If a closed circuit design is used to minimize energy consumption, then only the required fluid volume is cooled/heated, but fluid flow management becomes more complex
Solution Approach 1:
The separator is positioned at a lower elevation than the reservoir, creating a gravity-driven flow path that eliminates the need for additional pumping to overcome elevation differences. This gravity-assisted flow management simplifies the closed circuit system while maintaining energy efficiency, as the pump only needs to overcome friction losses rather than lifting fluid against gravity
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 effectively cools or heats body parts with reduced energy consumption and minimized air bubble entry into the pump, enhancing operational efficiency and reliability by using gravity-fed fluid flow and a closed circuit design.
Implementation Method 1
The separator is located below the main reservoir so as to receive fluid under the influence of gravity from the main reservoir. The separator has a volumetric space toward a top of the separator for allowing air bubbles to migrate toward the volumetric space to inhibit air from entering into the pump
Implementation Method 2
A system for cooling or heating a body part includes at least one bladder, a pump, a heat exchanger, a first fluid line in fluid communication with the heat exchanger and the at least one bladder
Implementation Method 3
The heat exchanger is in fluid communication with the pump
Data Source
AI summary
A system for cooling or heating a body part includes at least one bladder, a pump, a heat exchanger, a first fluid line in fluid communication with the heat exchanger and the at least one bladder, a second fluid line in fluid communication with the at least one bladder and the heat exchanger, a main reservoir and a separator. The heat exchanger is in fluid communication with the pump. The first fluid line is located downstream from the heat exchanger and the second fluid line is located downstream from the at least one bladder when the system is operating to cool or heat the body part. The separator is in fluid communication with the main reservoir and the pump and is located below the main reservoir to receive fluid under the influence of gravity from the main reservoir and to deliver fluid to the pump via gravity.