Micro Convection Pump for Gas Particle Detection
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Solution Overview
Problem
Current methods for detecting microorganisms in gaseous samples are inefficient and lack precision, particularly in preventing thermal denaturation of samples during detection, which affects the accuracy of microorganism detection in air and bioweapon applications.
Innovation Solution
A device comprising a micro convection pump, a cooling element, and a dielectrophoretic impedance (DEPIM) sensor, with a channel and reservoir system that cools, condenses, and collects samples for simultaneous detection, using a Peltier element and DEPIM sensor to classify and quantify microorganisms without external pumps, and a heater to create a pressure difference for sample flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a heater is used to create pressure difference for sample flow, then sample flow is achieved, but thermal denaturation of microorganisms occurs
Solution Approach 1:
The device divides the heating function into two separate heaters: a first heater that heats the inlet portion to create pressure difference for sample flow, and a second heater that heats the outlet portion to prevent condensation. This segmentation allows independent control of heating zones, enabling sample flow while preventing thermal denaturation at the detection location.
Solution Approach 2:
Different regions of the device are assigned different thermal characteristics: the inlet portion is heated to generate flow, the middle section is kept at controlled temperature for detection, and the outlet portion is heated to prevent condensation. This local quality differentiation ensures that each zone serves its specific function without compromising microorganism integrity.
2Ease of operation
If external pumps are used for sample transport, then sample flow control is improved, but device complexity increases
Solution Approach 1:
The device uses thermal fields (heaters) to self-generate the pressure difference required for sample flow, eliminating the need for external mechanical pumps. The heaters create temperature gradients that drive natural convection and pressure differences, allowing the system to transport samples autonomously without additional complex components.
Solution Approach 2:
The patent replaces mechanical pump systems with a thermal field-based flow generation mechanism. Instead of using mechanical forces to drive sample flow, the device uses thermal expansion and pressure differences created by heated regions, substituting a simpler thermal system for a complex mechanical pumping system.
3Productivity
If cooling element is used to condense sample, then sample collection efficiency is improved, but detection time increases
Solution Approach 1:
The cooling element continuously cools the reservoir region to maintain sample in condensed liquid form throughout the detection process. By pre-condensing samples and maintaining them in liquid state, the system eliminates the need for time-consuming condensation steps during detection, allowing immediate analysis of collected samples.
Solution Approach 2:
The cooling element operates continuously to maintain the reservoir at a temperature that keeps samples condensed. This continuous cooling ensures that samples remain in the liquid phase from collection through detection, eliminating interruptions and reducing total detection time while maintaining high collection efficiency.
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 device effectively detects microorganisms by preventing thermal denaturation and improving detection accuracy through simultaneous sample collection and analysis, reducing detection time and eliminating the need for external pumps, enhancing the bioenvironmental monitoring of air and bioweapon detection.
Implementation Method 1
a cooling layer which cools and condenses the sample flowing in the channel
Implementation Method 2
a cooling layer which cools and condenses the sample flowing in the channel
Implementation Method 3
a heater which heats the outlet portion to produce a pressure difference between the inlet portion and the outlet portion
Implementation Method 4
a heater which heats the outlet portion to produce a pressure difference between the inlet portion and the outlet portion
Implementation Method 5
a dielectrophoretic impedance (DEPIM) sensor
Implementation Method 6
using a Peltier element and DEPIM sensor to classify and quantify microorganisms without external pumps
Implementation Method 7
micro convection pump
Data Source
AI summary
A device for detecting micro particles in gas, which comprises: an inlet through which a gaseous sample including micro particles flows in; an outlet through which the sample flows out; a channel through which the sample flows from the inlet toward the outlet; a cooling layer which cools and condenses the sample flowing in the channel; a reservoir which is positioned on the cooling layer and collects the condensed sample; a detector which is positioned in the reservoir on the cooling layer and detects the micro particles included in the collected sample; and a heater which heats the outlet portion to produce a pressure difference between the inlet portion and the outlet portion, so that the sample flows through the channel from the inlet toward the outlet. The device for detecting micro particles in gas provides the advantage that micro particles included in gaseous sample can be detected without having to use additional pump or collector, detection time can be reduced, and detection accuracy can be improved.