Fluid Heater Distributed Element Design to Reduce Leakage Current
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Solution Overview
Problem
Medical electrical equipment faces challenges in minimizing leakage currents, which can pose physiological risks to patients, especially in fluid heating applications used for IV therapies, as existing designs often fail to meet safety standards for low leakage current while ensuring efficient and uniform fluid heating.
Innovation Solution
The development of fluid heating apparatuses with low or no leakage current, utilizing a configuration with heating elements distributed over a large surface area for efficient heat transfer, coupled with real-time temperature sensing and control systems to maintain optimal temperatures, and optionally integrated into existing fluid processing systems, ensuring compliance with medical safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If heating elements are concentrated in a small area to achieve efficient heating, then heating efficiency is improved, but leakage current increases and safety is compromised
Solution Approach 1:
The heating element is divided into multiple discrete heating zones or segments distributed across the fluid pathway. Each segment operates independently or in coordination, allowing the total heating function to be distributed over a larger surface area rather than concentrated in one location, thereby reducing leakage current while maintaining heating efficiency
Solution Approach 2:
The heating elements are arranged in a distributed pattern across the surface area of the fluid pathway rather than concentrating heat in a single point or small region. This spatial distribution across multiple dimensions reduces the current density and associated leakage risk while achieving uniform and efficient heating throughout the fluid
2Object-affected harmful factors
If heating elements are distributed over a large surface area to reduce leakage current, then safety is improved, but heating efficiency may decrease
Solution Approach 1:
Multiple distributed heating elements are combined to work in unison, with their individual heating contributions merging to achieve the required total heating effect. This allows the system to distribute elements across a large surface area for safety while maintaining overall heating efficiency through coordinated operation of all elements
Solution Approach 2:
The distributed heating elements provide continuous heating along the fluid pathway rather than localized intermittent heating. This continuous distribution ensures that heating action is maintained throughout the entire fluid path, improving efficiency while keeping each individual element at low power to minimize leakage current
3Reliability
If complex control systems are added to manage temperature and leakage current, then safety and temperature control are improved, but device complexity increases
Solution Approach 1:
Temperature sensors are positioned to detect fluid temperature at key locations, and this feedback information is used to automatically adjust the power supplied to the distributed heating elements. This closed-loop control maintains safe and effective temperatures without requiring complex manual intervention or overly sophisticated control systems
Solution Approach 2:
The heating system incorporates inherent safety features such as automatic power reduction or shutdown when temperature thresholds are exceeded, or when leakage current exceeds safe levels. The system monitors its own operation and self-regulates to maintain safety without requiring external complex control mechanisms
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
These apparatuses effectively heat fluids to desired temperatures with minimal leakage current, ensuring patient safety and compliance with medical standards, while allowing for flexible integration into various medical systems.
Implementation Method 1
a first heating element and a second heating element, each having a respective heating element surface, opposite one another with the fluid channel therebetween
Data Source
AI summary
A low leakage current fluid heater and systems and methods thereof. The fluid heater has a configuration whereby a heating element is isolated from a fluid channel so as to leak into fluid passing through the channel an allowed amount of leakage current. Fluid passing through the fluid heater can be heated to a desired temperature. A controller can provide control signals to driver the fluid heater to the desired temperature and maintain the temperature at the desired temperature.