Thermosiphon Radiator Capillary Structure for Larger Condensation Space
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Solution Overview
Problem
Conventional thermosiphon radiators have limited performance due to the liquid phase-change working medium occupying space that could be used as a condensation area, as its level is higher than the heat source interface, restricting the condensation space and overall efficiency.
Innovation Solution
A heat dissipation element comprising a substrate, cover plate, and capillary layer is integrated into the thermosiphon radiator, allowing the liquid phase-change working medium level to be positioned below or equal to the heat source interface, with a steam channel for efficient phase-change heat transfer and condensation, utilizing capillary forces to optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the liquid level of liquid phase-change working medium is positioned higher than the upper interface of the heat source, then the heat source heat can be fully absorbed through phase change heat transfer, but the condensation area space is occupied and limited
Solution Approach 1:
The patent introduces a capillary layer that extends vertically beyond the heat source interface, creating a new spatial dimension for phase change heat transfer. This allows the liquid level to be positioned below the heat source interface while still achieving full heat absorption through the capillary action and phase change mechanism in the extended capillary structure.
Solution Approach 2:
The capillary layer is constructed using porous materials with controlled pore sizes that enable capillary action. The porous structure allows the liquid phase-change working medium to be drawn upward against gravity into the capillary channels, maintaining liquid level below the heat source interface while ensuring sufficient heat transfer surface area.
2Area of stationary object
If the liquid level of liquid phase-change working medium is positioned lower than the upper interface of the heat source, then the condensation area is fully utilized, but the heat source heat cannot be fully absorbed through phase change
Solution Approach 1:
The capillary layer utilizes porous materials with specific pore size distributions to create capillary pressure that draws the liquid phase-change working medium upward. This capillary pressure mechanism enables the liquid level to remain below the heat source interface while still providing sufficient liquid to the heat source for full heat absorption through phase change.
Solution Approach 2:
The patent replaces the traditional gravity-driven liquid level mechanism with a capillary action-based liquid transport mechanism. The capillary forces generated by the porous structure substitute for gravitational effects, allowing liquid to be supplied to the heat source from below the interface level without relying on gravity to maintain liquid level above the heat source.
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 solution enhances the condensation space and improves the thermosiphon radiator's performance by ensuring the liquid phase-change working medium does not occupy condensation area, allowing full utilization and efficient heat transfer.
Implementation Method 1
The capillary layer is configured to suck the liquid phase-change working medium to perform phase-change heat transfer with the heat source
Implementation Method 2
a liquid level of a liquid phase-change working medium inside the thermosiphon radiator is higher than an upper interface of a heat source in a vertical direction, to allow the heat of the heat source to be fully absorbed through heat transfer of phase change
Implementation Method 3
A phase-change working medium inside a thermosiphon radiator circulates entirely by gravity
Data Source
AI summary
A heat dissipation element and a thermosiphon radiator are provided. The heat dissipation element includes a substrate and a cover plate connected to each other to form an accommodation cavity, and a capillary layer arranged in the accommodation cavity. The substrate has a first plate surface and a second plate surface opposite to each other, and a projection of a liquid level of a liquid phase-change working medium accommodated in the accommodation cavity on a plane extending along a direction of gravity is not higher than a top of a projection of a heat source mounted on the second plate surface on the plane. A steam channel is provided on the capillary layer and is configured to discharge a gaseous phase-change working medium generated by phase change from the capillary layer.