Phase-Change Heat Dissipation Assembly for Passive Coolant Flow
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Solution Overview
Problem
Current heat dissipation assemblies for CPUs consume power to control coolant flow, which is inefficient in terms of energy usage, especially with the increasing demand for lower power consumption in electronic devices.
Innovation Solution
A heat dissipation assembly using a phase change fluid that vaporizes and expands to move a plug between closed and open positions, controlling coolant flow without electrical power, by leveraging the phase change fluid's temperature-dependent state changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power-consuming detection elements and plugs are used to monitor and control coolant flow, then the CPU temperature can be monitored and controlled, but additional power consumption is incurred
Solution Approach 1:
The system uses the CPU's own heat to drive the phase change fluid, which automatically actuates the plug to control coolant flow. The heat from the CPU serves dual purposes: both the heat source for cooling and the actuation energy for the control mechanism, eliminating the need for external power consumption.
Solution Approach 2:
The invention employs a phase change fluid that transitions between liquid and gas states in response to CPU temperature changes. When the CPU exceeds a threshold temperature, the phase change fluid vaporizes and expands to push the plug open, allowing coolant flow. When temperature drops below the threshold, the fluid condenses and the plug closes, stopping coolant flow. This phase transition mechanism provides automatic temperature-based control without additional power consumption.
2Reliability
If coolant flow is continuously maintained to ensure adequate heat dissipation, then CPU temperature remains controlled, but energy efficiency is reduced
Solution Approach 1:
The system implements periodic coolant flow control based on CPU temperature conditions. Coolant flow is activated only when the CPU temperature exceeds the threshold (plug opens due to phase change fluid vaporization) and deactivated when temperature drops below the threshold (plug closes due to phase change fluid condensation). This periodic action ensures adequate heat dissipation while avoiding continuous coolant circulation, thereby improving energy efficiency.
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 assembly achieves energy-efficient coolant management by automatically adjusting coolant flow based on temperature changes, reducing power consumption while effectively dissipating heat.
Implementation Method 1
When the phase change fluid vaporizes into a gaseous state and expands, the plug is pushed away from the first end, causing the plug to move from the closed position to the open position
Implementation Method 2
When the phase change fluid vaporizes into a gaseous state and expands
Implementation Method 3
When the phase change fluid condenses from the gaseous state back to the liquid state, it no longer generates sufficient pressure to keep the plug open
Implementation Method 4
When the phase change fluid condenses from the gaseous state back to the liquid state
Implementation Method 5
a coolant to flow through the heat dissipation assembly to absorb heat generated by the heat source
Data Source
AI summary
A heat dissipation assembly comprises a casing, a pushed member, a plug and a phase change fluid. The casing has a first fluid space, a second fluid space and a communication channel. The first fluid space and second fluid space are in fluid communication with each other by the communication channel. A first end of the pushed member is fixed to the casing. The plug is movably disposed in the casing and has a closed position and an open position. The plug has an inner space. The phase change fluid is disposed in the inner space. A second end of the pushed member extends into the inner space and seals the phase change fluid in the inner space. When the phase change fluid is in a liquid state, the plug is in the closed position and closes the communication channel.