Water-Cooling Device Stator Immersion Heat Dissipation

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Solution Overview

Problem

Conventional water-cooling devices suffer from poor heat dissipation efficiency due to a small heat exchange area between the heat sink and cooling fluid, leading to overheating of the stator assembly and reduced operational efficiency of the pump unit, which shortens the device's lifetime.

Innovation Solution

The water-cooling device incorporates a main body with a pump chamber and a heat exchange chamber separated by a partitioning board, allowing the stator assembly to be immersed in the cooling fluid, reducing the distance between the rotor and stator assemblies, and enhancing heat dissipation through a heat transfer unit with a heat absorption and dissipation face.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the stator assembly is positioned outside the water-cooling module to protect it from cooling fluid contact, then the stator assembly is protected from damage, but the distance between the rotor assembly and stator assembly increases, reducing pump unit operation efficiency

Engineering Contradiction:

Improveprotection of stator assemblyVSAvoidoperation efficiency of pump unit

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies a waterproof coating or thin protective film on the stator assembly, allowing it to be immersed in cooling fluid while preventing direct contact damage. This thin film barrier enables the stator to be positioned inside the water-cooling module close to the rotor assembly, maintaining magnetic coupling efficiency while providing protection against cooling fluid exposure.

Inventive Principle:

Principle #30Flexible shells and thin films

2Area of stationary object

If multiple column bodies or flow ways are disposed on the heat sink to enlarge heat exchange area, then the heat exchange area between heat sink and cooling fluid is increased, but the heat dissipation performance is only slightly enhanced and the effect remains poor

Engineering Contradiction:

Improveheat exchange areaVSAvoidheat dissipation performance

Core Design Contradiction:

Area of stationary objectVSProductivity

Solution Approach 1:

The patent transitions from a conventional fin-based heat exchange surface to a three-dimensional water room structure with partitioning boards creating multiple chambers. This spatial reconfiguration allows cooling fluid to flow through vertical and horizontal pathways, dramatically increasing the heat exchange volume and surface area between the heat sink and cooling fluid, thereby significantly improving heat dissipation performance.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The heat sink is divided into multiple heat exchange chambers by water room partitioning boards, creating segmented flow paths for the cooling fluid. This segmentation increases the contact area between the cooling fluid and heat sink surfaces, allowing more efficient heat transfer throughout the entire heat sink structure rather than relying on limited external fin surfaces.

Inventive Principle:

Principle #1Segmentation

3Reliability

If the stator assembly is air-cooled to dissipate heat, then the stator assembly is isolated from cooling fluid, but the cooling effect is poor and the stator assembly often burns out due to overheating

Engineering Contradiction:

Improveisolation from cooling fluidVSAvoidstator assembly temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

A waterproof coating or thin protective film is applied to the stator assembly, enabling it to be immersed in cooling fluid while preventing direct contact damage. This allows the stator to be water-cooled instead of air-cooled, dramatically improving heat dissipation and preventing overheating while maintaining protection through the thin film barrier.

Inventive Principle:

Principle #30Flexible shells and thin films

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

This design significantly improves heat dissipation performance, prevents overheating of the stator assembly, and increases the operational efficiency of the pump unit, resulting in a longer device lifetime and reduced magnetic losses.

Implementation Method 1

The other side of the heat sink transfers the heat to a cooling fluid in the water-cooling thermal module

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 2

a heat sink made of copper or aluminum with good thermal conductivity. One side of the heat sink is directly attached to a heat generation component such as a central processor for absorbing the heat generated by the central processor

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS9772142B2Water-cooling device with stator and rotor pumping unit

Publication Date: 2017.09.26 ASIA VITAL COMPONENTS CO LTD

AI summary

A water-cooling device includes a main body having a pump chamber and a heat exchange chamber, which are partitioned from each other by a water room partitioning board. The water room partitioning board has a communication section for communicating the pump chamber with the heat exchange chamber. A pump unit is disposed in the pump chamber. A heat transfer unit is disposed in the heat exchange chamber. A cooling fluid is filled up in the pump chamber and the heat exchange chamber. The water-cooling device has greatly enhanced heat dissipation performance. Moreover, the water-cooling device is free from the problem of overheating of the stator assembly in operation.