Ohmic Fluid Heater With Irregular Electrode Array
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Solution Overview
Problem
Existing ohmic fluid heaters face challenges in controlling heating rates effectively across varying conditions, such as fluid conductivity, flow rates, and temperatures, due to limited adjustable resistance settings and the complexity of mechanical or electrode-based solutions, which are costly and prone to damage in industrial applications.
Innovation Solution
A compact ohmic fluid heater design featuring an irregular two-dimensional array of rod-like electrodes with power switches that allow for a wide range of specific resistances by varying electrode connections, enabling flexible heating rate control without moving parts and simplifying construction for customized applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical moving parts are used to vary electrode spacing for controlling heating rate, then heating rate control is achieved, but device complexity increases and reliability decreases due to moving parts exposed to fluid
Solution Approach 1:
The patent replaces mechanical moving parts with an electrical switching system. Instead of mechanically moving electrodes to change spacing, the invention uses power switches to selectively connect different electrodes to power supply poles, thereby controlling heating rate through electrical configuration rather than mechanical adjustment. This eliminates moving parts exposed to fluid while maintaining heating rate control capability.
Solution Approach 2:
The patent implements dynamic control of heating rate through electrical switching rather than mechanical movement. The system can rapidly reconfigure electrode connections to poles, enabling quick response to changing conditions without the inertia and wear associated with mechanical systems. This allows the heating rate to be dynamically adjusted by changing the electrical circuit configuration.
2Adaptability or versatility
If a substantial number of electrodes with multiple connection schemes are used to provide variable heating rates, then heating rate control range increases, but device complexity and cost increase
Solution Approach 1:
The patent divides the heating element into multiple discrete electrodes that can be independently connected to power supply poles. This segmentation allows different combinations of electrodes to be activated, creating multiple connection schemes that provide a range of heating rates. The segmented electrode structure enables flexible control while keeping each individual electrode simple in design.
Solution Approach 2:
The patent uses dynamic electrical switching to create multiple connection schemes from a fixed electrode array. Power switches selectively connect electrodes to poles based on desired heating rate, providing adaptability without requiring physical reconfiguration of the electrode structure. This dynamic electrical control achieves versatility while maintaining structural simplicity.
3Ease of operation
If electrodes are mechanically moved closer to vary electrical resistance for heating rate control, then heating rate adjustment is achieved, but response speed decreases due to mechanical inertia
Solution Approach 1:
The patent replaces mechanical electrode movement with electrical switching. Instead of physically moving electrodes to change resistance, the system uses power switches to rapidly reconfigure electrical connections between electrodes and power supply poles. This electrical reconfiguration occurs much faster than mechanical movement, enabling rapid response to changing heating requirements without mechanical inertia.
4Volume of moving object
If a compact design with irregular two-dimensional electrode array is used, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses a segmented array of discrete rod-like electrodes arranged in an irregular two-dimensional pattern. This segmentation allows the electrodes to be positioned at specific locations to create the desired irregular pattern, and the modular nature of individual rod electrodes simplifies manufacturing compared to continuous complex structures. The segmented approach enables compact packaging while managing positioning requirements through standardized electrode components.
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 solution provides a wide range of heating rates in a compact, cost-effective, and durable design, suitable for industrial use, by creating numerous distinct specific resistances through the irregular electrode array and control circuitry, ensuring efficient temperature regulation under diverse conditions.
Implementation Method 1
Electricity passes between the electrodes through the fluid at least one space between the electrodes, and electrical energy is converted to heat by the electrical resistance of the fluid.
Implementation Method 2
vary the heating rate by mechanically moving electrodes closer relative to one another, thereby varying the electrical resistance between the electrodes
Data Source
Figure 1~2
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Figure 5
AI summary
A heater for heating a conductive liquid includes a two-dimensional array of rod-like electrodes (22, 122, 322, 422, 522) extending parallel to one another, an electrical power supply having a plurality of poles, and power switches to connect different ones of the electrodes to different poles so that current flows between the poles through the liquid. The array desirably includes outer electrodes defining the boundary (24, 424) of the array and inner electrodes disposed within this boundary. The array may have regular or irregular spacings between the electrodes. The array can provide numerous different connection schemes to vary the electrical resistance between the poles and thus vary the heating rate. The array can be arranged to provide substantially equal currents through three poles of a three-phase power supply.