Concentric Flow Channels for Compact Liquid Temperature Control
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Solution Overview
Problem
Existing temperature control devices face inefficiencies in heat exchange between constant-temperature fluid and liquid chemicals, leading to slow temperature stabilization and increased system size.
Innovation Solution
A temperature control device with a liquid tank featuring a circulation passage formed by concentrically arranged screening cylinders and a heat transfer tube with spiral coils, allowing for efficient heat exchange by circulating constant-temperature fluid through the passage and around the heat transfer tube, enhancing flow rate and reducing system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a coil tube is simply immersed into the tank filled with heat exchange medium, then the device structure is simple, but heat exchange efficiency between liquid chemical and heat exchange medium is poor
Solution Approach 1:
The patent transitions from a simple linear coil tube arrangement to a multi-dimensional concentric circular channel structure with radial flow paths. The circulation passage is formed by multiple concentric circles with radial inlet and outlet passages, creating a two-dimensional flow pattern that maximizes heat exchange surface area and improves thermal efficiency while maintaining structural simplicity.
2Volume of moving object
If a container storing liquid chemical is disposed within the inner tank, then the system can be compact, but heat transfer from constant-temperature fluid to liquid chemical takes much time
Solution Approach 1:
The patent employs a pump to actively circulate the heat exchange medium through the concentric circular passages, creating forced convection flow. This hydraulic approach ensures continuous high-velocity fluid movement around the liquid chemical container, dramatically enhancing heat transfer coefficients and reducing temperature stabilization time while maintaining a compact system configuration.
Solution Approach 2:
The concentric circular channel arrangement creates multiple radial flow paths around the central liquid chemical container, utilizing two-dimensional flow patterns to maximize the heat exchange surface area. This multi-directional flow configuration intensifies heat transfer efficiency compared to single-direction flow, enabling faster temperature stabilization within a compact volume.
3Device complexity
If heat exchange is performed between liquid chemical flowing through coil tube and heat exchange medium, then the system can be simple, but heat exchange efficiency is insufficient leading to slow temperature control
Solution Approach 1:
The patent uses a pump to generate forced circulation of the heat exchange medium through the concentric circular passages at controlled flow rates. This active hydraulic system ensures high-velocity fluid flow and continuous renewal of the thermal boundary layer, significantly enhancing heat transfer coefficients and enabling rapid temperature control while maintaining relatively simple device structure.
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 enables quick and efficient temperature control of liquid chemicals by promoting effective heat exchange within a compact system, allowing for easy formation of a long circulation channel within the liquid tank.
Implementation Method 1
a heat transfer tube provided in the circulation passage, through which liquid chemical flows such that a heat exchange between the liquid chemical and the constant-temperature fluid is performed via the heat transfer tube
Implementation Method 2
a pump provided at a center position of a bottom of the liquid tank for circulating the constant-temperature fluid along the circulation passage
Data Source
AI summary
In a temperature control device, a plurality of screening cylinders each having a different diameter are concentrically arranged within a liquid tank to concentrically form a plurality of layered channels which are communicated to define a circulation passage through which constant-temperature fluid flows. A heat transfer tube through which liquid chemical flows is disposed in any one of the channels such that heat exchange between the liquid chemical and the constant-temperature fluid is performed via the heat transfer tube for controlling temperatures of the liquid chemical.