Metal Panel Heat Distribution for Fluidic Sample Test Apparatus
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Solution Overview
Problem
Existing fluidic sample test apparatuses face challenges in maintaining uniform temperature conditions during biochemical reactions, which can lead to denatured reactants and unreliable analysis results due to non-uniform heat distribution.
Innovation Solution
The apparatus features a metal panel with bent portions that contact a printed circuit board (PCB) to ensure uniform heat transmission to the sample cartridge, using metallic materials like copper or aluminum for efficient heat conduction and distribution, allowing for rapid temperature increase and maintenance of optimal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional heating arrangement is used in the mounting part, then the heating function is provided, but the temperature distribution across the sample cartridge becomes non-uniform
Solution Approach 1:
The heating function is segmented between two separate components: a heating member on the PCB providing bottom heating, and a metal panel providing top heating. This segmentation allows independent optimization of each heating source to achieve uniform temperature distribution across the sample cartridge, resolving the contradiction between heating effectiveness and temperature uniformity.
Solution Approach 2:
The metal panel acts as an intermediary heat transfer component. It receives heat from the heating member and distributes it uniformly across the top surface of the sample cartridge through its high thermal conductivity. This intermediary structure enables controlled heat distribution that directly improves temperature uniformity while maintaining heating efficiency.
2Area of stationary object
If the metal panel and PCB are placed close together for compact design, then the device size is reduced, but heat transmission efficiency to the sample cartridge decreases
Solution Approach 1:
The design transitions from a single-plane compact arrangement to a three-dimensional stacked configuration. The metal panel is positioned above the sample cartridge while the PCB with heating member is below it, utilizing the vertical dimension to accommodate both components within a small footprint. This dimensional change allows close proximity for compactness while maintaining adequate heat transmission paths through the sample cartridge.
3Loss of time
If heating is applied rapidly to achieve quick temperature increase, then the analysis time is reduced, but temperature uniformity across the sample cartridge deteriorates
Solution Approach 1:
The metal panel is pre-positioned in direct contact with the top surface of the sample cartridge before heating begins. This preliminary arrangement ensures that heat distribution pathways are established in advance, allowing rapid heating to proceed uniformly from both top and bottom surfaces simultaneously, thus achieving quick temperature stabilization without sacrificing uniformity.
Solution Approach 2:
The heating system provides localized heating from both the top (via metal panel) and bottom (via PCB heating member) surfaces of the sample cartridge. This dual-directional local heating approach ensures that each region of the sample cartridge receives appropriate heat flux, enabling rapid and uniform temperature increase across the entire sample area.
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 configuration ensures uniform temperature distribution across the sample cartridge, enhancing the reliability of analysis results by rapidly achieving and maintaining the necessary temperature for biochemical reactions.
Implementation Method 1
a metal panel with bent portions that contact a printed circuit board (PCB) to ensure uniform heat transmission to the sample cartridge, using metallic materials like copper or aluminum for efficient heat conduction and distribution
Data Source
AI summary
A fluidic sample test apparatus has a mounting part such that the temperature of a fluidic sample, which is inserted into the mounting part, is uniformly maintained. The fluidic sample test apparatus includes a main body having a mounting part into which a sample cartridge is inserted, a metal panel disposed on one surface of the mounting part, and a printed circuit board (PCB) disposed on another surface of the mounting part facing the one surface. One side of the metal panel is in contact with the PCB.