Liquid Cooling Working Substance With Visible Two-Liquid Flow

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Solution Overview

Problem

Existing liquid cooling modules in electronic devices suffer from poor flowing visualization effects due to the small size of the cavity, which affects the visibility and efficacy of the working substance's flow, particularly when using dyes for visualization.

Innovation Solution

A working substance comprising a first medium and a second medium with a liquid-liquid interface, where the first medium has a higher heat dissipation coefficient than the second medium, and includes additives to reduce surface tension and improve infiltration, enabling significant flowing visualization and heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a dye is used to color the working substance to achieve flowing visualization, then the flowing display region has a sense of science and technology, but the flowing visualization effect is poor in electronic devices due to the small cavity size

Engineering Contradiction:
Improveflowing visualization effectVSAvoidcavity size
Core Design Contradiction:
Ease of manufactureVSVolume of moving object

Solution Approach 1:

The patent changes the physical parameters of the working substance by introducing a liquid-liquid interface between two immiscible liquids with different densities. This creates a visible interface that moves with the flow, providing visualization without requiring dye coloring. The density difference and interface visibility allow the flow to be observed clearly in small cavities typical of electronic devices.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses an intermediary substance (the second liquid) that is immiscible with the first liquid to create a visible interface. This intermediary allows the flow to be visualized through the moving boundary between the two liquids, eliminating the need for dye additives and enabling clear visualization in small electronic device cavities.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of manufacture

If the working substance is colored with dye to improve visualization, then the flowing process becomes visible, but the heat dissipation performance may be compromised

Engineering Contradiction:
Improveflowing visualizationVSAvoidheat dissipation performance
Core Design Contradiction:
Ease of manufactureVSTemperature

Solution Approach 1:

The patent changes the composition parameters by using a two-liquid system where the first liquid has superior heat dissipation properties and the second liquid provides visualization through the interface. This parameter change allows both heat dissipation and visualization functions to be optimized simultaneously without the need for dye additives that might compromise thermal performance.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent segments the working substance into two distinct liquid phases, where each phase serves a specific function: the first liquid (with higher heat dissipation coefficient) handles thermal management, while the second liquid creates the visual interface. This segmentation allows each component to optimize its primary function without interference from the other.

Inventive Principle:
Principle #1Segmentation

3Volume of moving object

If the cavity size is reduced for electronic device integration, then the device becomes more compact, but the flowing visualization effect deteriorates

Engineering Contradiction:
Improvedevice compactnessVSAvoidflowing visualization effect
Core Design Contradiction:
Volume of moving objectVSEase of manufacture

Solution Approach 1:

The patent changes the visualization mechanism from dye-based optical coloring to density-based liquid-liquid interface visualization. This parameter change in the working substance allows the flow to be visible even in the small cavities of compact electronic devices, as the interface contrast provides clear visual feedback without requiring the large cavity volumes needed for traditional dye visualization methods.

Inventive Principle:
Principle #35Parameter changes

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 achieves both effective heat dissipation and visible flowing visualization in electronic devices by ensuring the working substance's liquid-liquid interface moves relative to the cavity, enhancing user experience through improved visualization and thermal management.

Implementation Method 1

A liquid-liquid interface exists between the first medium and the second medium. When the working substance moves, the liquid-liquid interface moves relative to a cavity configured to accommodate the working substance, to generate significant flowing visualization effect.

Methodology Applied
Scientific EffectLiquid-liquid interface:

Implementation Method 2

a heat dissipation coefficient of the first medium is greater than a heat dissipation coefficient of the second medium

Methodology Applied
Scientific EffectHeat dissipation: Conduction (thermal)

Implementation Method 3

the first additive is used to reduce surface tension of the first medium. The first additive can improve infiltration performance of the working substance to the cavity, and reduce a problem of wall hanging of the first medium

Methodology Applied
Scientific EffectSurface tension reduction: Surfactant

Data Source

PatentEP4712710A1Working substance, liquid cooling module, electronic device, and preparation method for working substance
Publication Date: 2026.03.18 HUAWEI TECH CO LTD
  • EP4712710A1 patent drawingFigure 1
  • EP4712710A1 patent drawingFigure 2~3
  • EP4712710A1 patent drawingFigure 4~5

AI summary

This application discloses a working substance, a liquid cooling module, an electronic device, and a method for preparing a working substance, and relates to the field of electronic device technologies. The working substance may include a first medium and a second medium, where a liquid-liquid interface exists between the second medium and the first medium, and a heat dissipation coefficient of the first medium is greater than a heat dissipation coefficient of the second medium. The heat dissipation coefficient of the first medium is greater than the heat dissipation coefficient of the second medium, and the first medium has the larger heat dissipation coefficient, so that the working substance including the first medium has good heat dissipation performance. The liquid-liquid interface exists between the second medium and the first medium. In a moving process of the working substance, the liquid-liquid interface moves relative to a cavity configured to accommodate the working substance, to achieve significant flowing visualization effect. The working substance disclosed in this application may be used in the electronic device, so that at least a partial region of the electronic device has flowing visualization effect.