Pulsating Vapor Chamber Asymmetric Loop Horizontal Operation
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Solution Overview
Problem
Pulsating vapor chambers fail to operate effectively when disposed horizontally, limiting their application and requiring avoidance of tilting or turning, which restricts their use in various devices.
Innovation Solution
A pulsating vapor chamber design featuring an asymmetric loop with differently sized paths and staggered channels on opposite surfaces, allowing vaporized liquid to move between levels and maintain circulation even when horizontal, utilizing communicating holes to connect channels and ensure pressure differences for fluid oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pulsating vapor chamber uses a conventional symmetric loop design, then the structure is simple and easy to manufacture, but the chamber fails to operate effectively when disposed horizontally
Solution Approach 1:
The patent applies asymmetry by designing the loop with different path lengths and configurations on opposite sides. Specifically, one side of the loop has a longer path while the other side has a shorter path, creating asymmetric pressure distribution that enables fluid circulation even in horizontal orientation. This asymmetric structure resolves the technical contradiction by enabling horizontal operation without significantly complicating the overall manufacturing process.
Solution Approach 2:
The patent introduces vertical dimensionality by forming channels on both the first and second surfaces of the inner board, with channels on opposite surfaces communicating through holes. This three-dimensional arrangement creates multiple flow paths at different levels, enabling the vapor chamber to operate effectively in horizontal position by utilizing vertical pressure differences generated through the asymmetric loop configuration.
2Adaptability or versatility
If the pulsating vapor chamber is designed to avoid tilting or turning, then the circulation function is maintained, but the application range is restricted
Solution Approach 1:
The asymmetric loop design with different path lengths on opposite sides creates inherent pressure differences that drive fluid circulation regardless of orientation. This allows the vapor chamber to maintain reliable circulation function while being adaptable to various mounting positions and applications, resolving the contradiction between reliability and versatility.
Solution Approach 2:
The patent designs the vapor chamber with universal applicability by enabling it to function effectively in horizontal, vertical, and inclined orientations. The asymmetric loop structure with multi-level channels provides multi-functional capability, allowing the same device to be applied in diverse scenarios without requiring structural modifications or tilting/turning restrictions.
3Device complexity
If the loop is disposed horizontally, then the device structure is simplified, but the vapor chamber cannot start to oscillate or circulate
Solution Approach 1:
The asymmetric loop configuration creates unequal pressure distributions even in horizontal orientation. The longer path side generates different pressure characteristics compared to the shorter path side, which drives the oscillation and circulation of vapor and liquid phases. This maintains fluid circulation efficiency while allowing simple horizontal mounting.
Solution Approach 2:
By forming channels on both surfaces of the inner board and connecting them through holes, the patent creates vertical fluid pathways that enable oscillation and circulation in horizontal mounting. This multi-level channel structure maintains productivity by generating the necessary pressure differences through vertical dimensionality even when the overall device is mounted horizontally.
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
Enables the pulsating vapor chamber to function and circulate fluid effectively even when disposed horizontally, overcoming previous limitations and expanding its application possibilities.
Implementation Method 1
The heated portion of the heat pipe and the vapor chamber is connected to a heat source... After the working fluid in the heated portion of the heat pipe and the vapor chamber is heated by the heat source, the working fluid is changed from liquid state to gaseous state
Implementation Method 2
the vaporized working fluid moves to the cooling portion of the heat pipe and the vapor chamber and is cooled by the heat sink, so the vaporized working fluid is transferred back to the liquid state
Implementation Method 3
pressures of the vapor plugs are changed, alternately larger and smaller in every individual direct portion, so the vaporized working fluids may push the existing liquid slugs to move upward or downward, i.e. to oscillate in every individual direct portion
Data Source
AI summary
A pulsating vapor chamber has an inner board, a first outer board, a second outer board, an asymmetric loop, and a working fluid. The inner board has a first surface and a second surface. The first and second outer boards are mounted on the first surface and the second surface of the inner board respectively. The asymmetric loop is located between the first and second outer boards and has multiple channels communicating with each other in sequence. A part of the channels are formed between the first outer board and the inner board, and the remaining channels are formed between the second outer board and the inner board. With the asymmetric loop, even if the vapor chamber is disposed horizontally, pressure may be changed by different amount in the channels so that the working fluid is still able to oscillate or circulate.