Heat Sink Channel Isolation for Two-Phase Cooling Flow
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Solution Overview
Problem
Existing 3DVC heat sinks experience reduced heat dissipation efficiency due to shear force interference between gaseous and liquid working media during the evaporation-condensation cycle, leading to poor heat dissipation performance.
Innovation Solution
A heat sink design featuring a base with an evaporation cavity, gaseous and liquid working medium ports, and an isolation portion that separates the gaseous and liquid working medium channels, preventing direct contact and interference, and includes a capillary structure to facilitate centralized evaporation and condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gaseous and liquid working media flow in opposite directions in the same channel, then the evaporation-condensation cycle can be completed, but shear force interference occurs between the two phases reducing heat dissipation efficiency
Solution Approach 1:
The patent divides the working medium flow path into separate channels: a gaseous working medium channel and a liquid working medium channel. The gaseous channel includes a gaseous working medium input channel and gaseous working medium output port, while the liquid channel includes a liquid working medium input port and liquid working medium output port. This segmentation prevents direct contact and shear force interference between gaseous and liquid phases, allowing each to flow smoothly in its designated path while maintaining the evaporation-condensation cycle for effective heat dissipation.
2Productivity
If the working medium channels are not isolated, then the structure is simpler, but the opposite flowing directions cause interference and reduce heat dissipation performance
Solution Approach 1:
The patent introduces an isolation portion as an intermediary structure that separates the gaseous working medium channel from the liquid working medium channel. The isolation portion includes a gaseous working medium input channel and a liquid working medium backflow channel, with the gaseous channel input communicating with the liquid channel output. This intermediary structure enables the two phases to flow in opposite directions without direct interference, maintaining heat dissipation performance while providing a clear structural separation that manages the complexity systematically.
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 design enhances heat dissipation efficiency by isolating gaseous and liquid working media flows, reducing interference and improving the overall heat dissipation effect.
Implementation Method 1
a working medium is heated and evaporated in an evaporation cavity to become a gaseous state
Implementation Method 2
is condensed in a condensation cavity to become a liquid state
Implementation Method 3
realizes fast heat transfer by using an evaporation-condensation cycle of a working medium in the heat sink
Data Source
AI summary
Disclosed in the embodiments of the present application are a heat sink and an electronic device. The disclosed heat sink comprises a base, a condensation portion and an isolation portion, wherein the base is provided with an evaporation cavity, and a gaseous working medium output port and a liquid working medium backflow port, which are both in communication with the evaporation cavity; the isolation portion is provided with a gaseous working medium input channel; a first end portion of the gaseous working medium input channel is in communication with the gaseous working medium output port; the isolation portion is arranged in the condensation portion; a liquid working medium backflow channel is formed between the outer surface of the isolation portion and the inner wall of the condensation portion; and the isolation portion isolates the gaseous working medium output port from the liquid working medium backflow port.