Differential Scanning Calorimeter Cooling Block Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Differential scanning calorimeters face limitations in cooling efficiency and measurement accuracy due to heat inflow from the cooling head to the thermal resistor, which affects the heat conduction balance and stability, particularly when using external cooling devices like gas or electric cooling systems.
Innovation Solution
The design includes a cooling block with a side wall that fits into the cooling head's inner hole, positioning the thermal resistor away from direct contact with the cooling head, and using a protruding portion and annular groove to enhance heat conduction through specific contact areas, reducing thermal resistance and heat conduction loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the cooling head is positioned close to the thermal resistor to improve cooling efficiency, then cooling speed increases, but heat inflow from the cooling head to the thermal resistor occurs causing measurement instability
Solution Approach 1:
The patent introduces a cooling block as an intermediary component between the cooling head and the thermal resistor. The cooling block receives cooling from the cooling head and then conducts heat away from the thermal resistor through its own thermal pathways, preventing direct heat inflow to the thermal resistor while maintaining cooling efficiency. This mediator structure resolves the contradiction by decoupling the cooling function from the measurement function.
Solution Approach 2:
The patent segments the cooling system into distinct functional zones: the cooling head for generating cooling, the cooling block for heat distribution and isolation, and the thermal resistor for controlled heat flow to the heat sink. This segmentation allows each component to perform its specific function without interfering with others, particularly preventing the cooling head from directly heating the thermal resistor.
2Temperature
If gas cooling device is used to achieve wide temperature range, then temperature range expands, but running cost increases due to complicated coolant supplementation
Solution Approach 1:
The cooling block is designed to work with multiple types of cooling devices (gas cooling, electric cooling, or other external cooling systems). By creating a universal cooling interface and heat distribution structure, the patent allows the same apparatus to achieve wide temperature ranges using different cooling methods, reducing dependency on expensive gas cooling systems while maintaining the ability to access low temperature ranges when needed.
3Reliability
If cooling head is separated from thermal resistor to eliminate heat inflow, then measurement stability improves, but thermal resistance occurs in cooling block reducing cooling efficiency
Solution Approach 1:
The cooling block serves as an efficient thermal intermediary that maintains strong thermal coupling between the cooling head and the heat sink while isolating the thermal resistor from direct cooling influence. The cooling block's high thermal conductivity ensures minimal thermal resistance in the cooling pathway, while its structure prevents heat flow from the cooling head to the thermal resistor, thus maintaining both cooling efficiency and measurement stability.
4Volume of moving object
If cooling head is inserted at deviated position to fit completely in cooling block, then cooling head is fully housed, but uniform cooling of cooling block cannot be ensured
Solution Approach 1:
The cooling block is designed with an asymmetric internal structure that accommodates the cylindrical cooling head while ensuring optimal thermal contact and heat distribution. The cooling block may include asymmetric heat pathways, varying wall thicknesses, or strategic thermal conductivity variations that compensate for the deviated positioning of the cooling head, ensuring uniform cooling across the entire cooling block volume despite the offset configuration.
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 improves cooling speed, measurement accuracy, and overall cooling efficiency by minimizing heat inflow and thermal resistance, allowing for more precise temperature control and enhanced performance across a wider temperature range.
Implementation Method 1
a thermal resistor, which is connected between the heat sink and the cooling block, and forms a heat flow path therebetween
Implementation Method 2
a cooling head, which is provided with an inner hole for allowing the cooling head to be detachably fitted to the cooling block, and is cooled by an external cooling device
Implementation Method 3
the cooling block has a side wall, which is formed on an outside of a connected portion connected to the thermal resistor, and is fitted to the inner hole
Data Source
AI summary
The differential scanning calorimeter includes: a heat sink, which stores a measuring sample and a reference material; a heater, which heats the heat sink; a cooling block, which is separated away from the heat sink, and positioned below the heat sink; a thermal resistor, which is connected between the heat sink and the cooling block, and forms a heat flow path therebetween; a cooling head, which is detachably fitted to the cooling block, and is cooled by an external cooling device; and differential heat flow detectors, which output a temperature difference between the measuring sample and the reference material as a heat-flow-difference signal, in which: the cooling block forms a side wall to fit the bore of the cooling head outward from the joint of the thermal resistance body; the top surface of the cooling head is lower than the joint.