Micro Heating Device With Oil Chamber For PCR Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current micro heating devices for bio-MEMS systems face challenges in providing a quick and efficient gene amplification process, particularly in achieving precise temperature control for PCR, while minimizing power consumption and thermal mass for portable and real-time DNA diagnosis.
Innovation Solution
A micro heating device comprising a support part with heating elements, an oil chamber, a specimen chamber with a temperature sensor, and a drive part, where the control unit manages the movement of the specimen chamber within the oil chamber to maintain preset temperatures for denaturation, annealing, and extension reactions, utilizing mineral oil with a low melting point for thermal isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a micro heating device is designed for PCR with small thermal mass for portable use, then power consumption is reduced and portability is improved, but temperature control precision and thermal isolation become more difficult to achieve
Solution Approach 1:
The heating device is segmented into distinct functional zones: a heating part with heating elements, an oil chamber for thermal isolation, and a specimen chamber for reactions. This segmentation allows each part to be optimized independently - the heating part for efficient energy use, the oil chamber for thermal isolation, and the specimen chamber for precise temperature control during PCR cycles.
Solution Approach 2:
Mineral oil is introduced as an intermediary thermal medium between the heating part and the specimen chamber. The oil chamber filled with mineral oil acts as a thermal buffer that isolates the specimen chamber from direct heating, enabling more precise temperature control and reducing power consumption by eliminating heat loss to surrounding structures.
2Productivity
If the specimen chamber is made small for quick heating and real-time diagnosis, then response time is reduced, but thermal isolation and temperature uniformity become more challenging
Solution Approach 1:
The mineral oil in the oil chamber serves as a thermal intermediary that distributes heat uniformly to the specimen chamber. The oil's high specific heat capacity and thermal conductivity ensure even heat distribution throughout the small specimen chamber, maintaining temperature uniformity while enabling rapid heating for quick PCR reactions.
Solution Approach 2:
The mineral oil undergoes phase transition from solid to liquid at a specific temperature, which is utilized to provide thermal buffering. During the phase transition, the oil absorbs and releases latent heat, helping to maintain stable and uniform temperatures in the specimen chamber during the heating and cooling cycles of PCR.
3Use of energy by stationary object
If thermal isolation is enhanced for portable battery operation, then power consumption decreases, but device complexity increases
Solution Approach 1:
The mineral oil chamber serves as a passive thermal intermediary that provides effective thermal isolation without requiring active control mechanisms. The oil physically isolates the specimen chamber from the heating part and external environment, reducing power consumption for portable operation while adding minimal structural complexity compared to active thermal management systems.
Solution Approach 2:
The design changes the thermal parameters of the system by introducing mineral oil with specific thermal properties (high specific heat capacity, appropriate viscosity, low melting point). These parameter changes enable effective thermal isolation and temperature control without complex active control systems, making the device suitable for portable battery operation.
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
Enables accurate and uniform temperature control, efficient gene amplification in a short time with minimal power consumption, suitable for portable and on-site DNA diagnosis, and allows for mass manufacturing with low costs.
Implementation Method 1
a support part having at least one or more heating part
Implementation Method 2
utilizing mineral oil with a low melting point for thermal isolation
Data Source
AI summary
A micro heating device according to an embodiment of the inventive concept comprises a support part having at least one or more heating part, an oil chamber positioned over the support part and filled with oil therein, a specimen chamber having a reaction space into which a specimen is loaded and which is provided so as to be dipped into the oil, and a drive part configured to move the specimen chamber in the oil. The specimen chamber includes a temperature sensor for measuring a temperature of the specimen chamber.