Centrifuge Heating Element Decoupled From Chamber
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Solution Overview
Problem
The efficiency of temperature control in centrifuge chambers varies due to differences in rotors and samples, affecting reproducibility of environmental conditions.
Innovation Solution
A fluid heated by the heating element is directed through a feed channel into the centrifuge chamber using a blower unit, allowing for rapid heating and uniform temperature distribution, with a thermocouple for temperature control and a discharge channel for energy reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating element is installed inside the centrifuge chamber to heat the rotor and samples, then temperature control is achieved, but the efficiency varies for different rotors and samples reducing reproducibility
Solution Approach 1:
The heating element is extracted from the centrifuge chamber and placed in a separate location. Instead of directly heating the rotor and samples through conduction, the heating element heats air that is then circulated into the chamber. This extraction resolves the contradiction by eliminating the variable heat conduction paths while maintaining temperature control capability.
Solution Approach 2:
Air is introduced as an intermediary medium between the heating element and the samples. The heating element heats the air, and the circulated air serves as the mediator that uniformly transfers thermal energy to all samples in the chamber, eliminating direct contact heat conduction variations.
2Temperature
If a heating element is installed inside the centrifuge chamber, then temperature control is achieved, but heat distribution uniformity across samples is reduced
Solution Approach 1:
A blower unit is used to circulate heated air through the centrifuge chamber. This pneumatic system ensures uniform distribution of thermal energy across all samples by forcing the heated air to flow through the entire chamber, resolving the heat distribution uniformity problem.
Solution Approach 2:
The blower unit operates in cycles, continuously circulating air through the chamber. This periodic action ensures that all regions of the chamber receive heated air over time, achieving uniform temperature distribution across all samples.
3Productivity
If the heating element is placed close to the centrifuge chamber for efficient heating, then heating efficiency is improved, but heat conduction control becomes difficult
Solution Approach 1:
Air serves as an intermediary that can be easily controlled and circulated. The heating element can be positioned optimally for efficient heating, and the air circulation system provides precise control over heat distribution, resolving both heating efficiency and control difficulties.
Solution Approach 2:
The system changes the heat transfer parameter from direct conduction to convection through air circulation. This allows the heating element to be positioned for optimal efficiency while the blower unit provides control over the heat transfer rate and distribution.
4Reliability
If the centrifuge chamber is completely isolated from the outside environment, then sample contamination is prevented, but temperature control flexibility is reduced
Solution Approach 1:
Air acts as an intermediary that can be controlled to either isolate or connect the chamber to the environment. The system can circulate air through the chamber for temperature control while maintaining isolation, or allow controlled air exchange when needed, providing both protection and flexibility.
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 method enhances temperature control precision, reduces energy consumption, and improves reproducibility by decoupling the heating element from the centrifuge chamber, ensuring consistent sample heating without relying on heat conduction from the rotor.
Implementation Method 1
a fluid heated by the heating element can be guided by means of the blower unit through the feed channel into the centrifuge chamber
Implementation Method 2
The supply channel can be designed as an air supply channel. Thus, the temperature of the centrifuge chamber can be controlled, for example, by means of an air flow
Implementation Method 3
a thermocouple is formed on the centrifuge. This allows the temperature in the centrifuge chamber to be measured
Implementation Method 4
the heating element and the thermocouple are coupled to one another by a control circuit. This allows the heating element to be controlled depending on the measured temperature
Implementation Method 5
a discharge channel is formed which connects the centrifuge chamber with the heating element and/or the blower unit. This allows already heated fluid, such as air, to be fed back from the centrifuge chamber to the heating element
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
It is proposed that in a centrifuge (1) comprising a centrifuge chamber (2), a heating element (3), a blower unit (4) and a feed channel (5), a fluid heated by the heating element (3) is directed by the blower unit (4) through the feed channel (5) into the centrifuge chamber (2).