Planar Heating Element for Sample Concentrator Tube
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Solution Overview
Problem
Existing sample concentration devices face challenges in rapidly and uniformly raising the temperature of a sorbent to a desorption temperature, which is essential for efficient analysis of trace gas samples. Additionally, these devices often suffer from thermal degradation of the sorbent and increased chemical noise due to non-uniform temperature control.
Innovation Solution
A sample concentrator tube with a heat-resistant planar heating element adhered to its outer surface, which allows for rapid and precise temperature control. The heating element is composed of a carbon nanotube or carbon nanotube-metal complex with a silicone adhesive, providing efficient heat transfer and minimizing temperature differences across the sorbent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a heating wire is wound on the outer surface of the tube for heating, then heating function is provided, but the heating wire linearly expands during heating causing decreased adhesion with the tube and inability to precisely control sample temperature
Solution Approach 1:
The patent replaces the mechanical winding structure of heating wires with a planar heating element that is adhered to the tube surface. This substitution eliminates the linear expansion problem of wound wires while maintaining heating capability, enabling precise temperature control for sample desorption.
Solution Approach 2:
The patent changes the physical form of the heating element from a three-dimensional wound wire structure to a two-dimensional planar structure. This parameter change allows the heating element to maintain stable contact with the tube surface during thermal expansion, preventing adhesion loss and ensuring accurate temperature control.
2Productivity
If high heating rate is applied to rapidly raise temperature to desorption temperature, then analysis efficiency is improved, but thermal shock causes degradation of the sorbent and adsorbed material
Solution Approach 1:
The planar heating element provides uniform heat distribution across the tube surface, creating consistent local heating conditions. This prevents localized thermal shock that would otherwise degrade the sorbent, while still achieving the required high heating rate for efficient analysis.
Solution Approach 2:
The heating system enables dynamic temperature control with rapid response capability. The planar heating element can quickly adjust temperature profiles to optimize desorption efficiency while preventing excessive thermal stress on the sorbent material.
3Productivity
If heating is applied to desorb volatile material from sorbent, then sample concentration is achieved, but non-uniform temperature distribution causes thermal degradation and increases chemical noise
Solution Approach 1:
The planar heating element ensures uniform temperature distribution across the entire sorbent bed, eliminating hot spots that would cause localized thermal degradation. This uniform heating reduces chemical noise while maintaining efficient desorption of volatile materials.
Solution Approach 2:
The planar heating element creates a consistent temperature profile that accurately replicates the desired heating pattern across the sorbent. This uniform thermal field prevents irregular desorption and minimizes chemical noise generation.
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 enables precise control of the sorbent temperature, preventing thermal degradation and minimizing chemical noise. It allows for rapid heating and efficient thermal desorption of samples, improving analysis reproducibility and energy efficiency.
Implementation Method 1
a heating layer 200 including a heat-resistant planar heating element adhered to an outer peripheral surface of the tube 100
Implementation Method 2
The heating element is composed of a carbon nanotube or carbon nanotube-metal complex with a silicone adhesive, providing efficient heat transfer
Implementation Method 3
an adsorptive material layer formed on the electrical heating substrate to contact the fluid channel for adsorbing moisture or volatile organic compounds in a gas flow
Data Source
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Figure 5
AI summary
A sample concentrator tube having a heat-resistant planar heating element adhered thereto, an analysis device comprising the same, and an analysis method using the same, according to the present invention, have an effect capable of precisely controlling the temperature by uniformly and rapidly heating the sample concentrator tube to a target temperature for desorption, and capable of almost simultaneously desorbing an adsorbed sample in any part of an adsorbent by minimizing a local temperature difference of the adsorbent in the tube. In addition, it is possible to minimize chemical noise by preventing thermal denaturation of the adsorbent caused by over-heating, and there is an advantage of excellent reproducibility as well as an effect of being inexpensive, economical, and excellent in energy efficiency.