Looped Thermal Module With Unidirectional Valve

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Solution Overview

Problem

Current thermal modules for electronic devices lack sufficient thermal transport capabilities, particularly in high heat generation scenarios where space constraints limit the use of conventional thermal modules with comparable thermal transport capacity.

Innovation Solution

The implementation of thermal modules with flow barriers that function as a unidirectional valve, allowing refrigerant to flow uniformly in one direction while restricting flow in the opposite direction, enhancing thermal transport capacity by promoting a pressure differential and using capillary wicking to facilitate a two-phase cooling loop.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional thermal modules are used, then device complexity is reduced, but thermal transport capacity is insufficient

Engineering Contradiction:
Improvethermal transport capacityVSAvoidmodule structure complexity
Core Design Contradiction:
PowerVSDevice complexity

Solution Approach 1:

The thermal module is divided into distinct functional sections: evaporator section, condensation section, and intermediate section with flow barriers. This segmentation allows each region to perform its specific thermal function efficiently while maintaining an organized, manageable structure that increases capacity without proportionally increasing overall complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Flow barriers are strategically positioned at specific locations within the intermediate section to create unidirectional flow paths. This local modification optimizes refrigerant flow directionality in critical areas, enhancing thermal transport capacity in the heat dissipation region without requiring complex modifications throughout the entire module.

Inventive Principle:
Principle #3Local quality

2Power

If thermal module size is reduced for space constraints, then device compactness is improved, but thermal transport capacity decreases

Engineering Contradiction:
Improvethermal transport capacityVSAvoidmodule volume
Core Design Contradiction:
PowerVSVolume of moving object

Solution Approach 1:

The flow barriers are integrated within the existing module structure, nesting the unidirectional flow control functionality within the intermediate section boundaries. This allows the module to achieve enhanced thermal transport capacity through optimized internal flow paths without requiring additional external space, effectively utilizing the available volume.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The flow barriers create three-dimensional flow paths with varying heights and directions within the intermediate section. By utilizing vertical and lateral dimensions for flow control rather than simply extending the module horizontally, the design achieves high thermal transport capacity within a compact footprint, optimizing space utilization.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 solution significantly increases thermal transport capacity, allowing for more effective heat dissipation in electronic devices with high heat generation and space constraints, achieving several times greater thermal transport capacity than traditional modules.

Implementation Method 1

allowing refrigerant to flow uniformly in one direction while restricting flow in the opposite direction, enhancing thermal transport capacity by promoting a pressure differential

Methodology Applied
Scientific EffectPressure differential: Pressure Gradient

Implementation Method 2

using capillary wicking to facilitate a two-phase cooling loop

Methodology Applied
Scientific EffectCapillary wicking: Capillary Action

Implementation Method 3

a first section configured to convert a refrigerant to a first state

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 4

convert a refrigerant to a first state; convert the refrigerant to a second state different from the first state

Methodology Applied
Scientific EffectPhase change: Phase Change

Implementation Method 5

a second section configured to convert the refrigerant to a second state different from the first state

Methodology Applied
Scientific EffectCondensation: Condensation

Data Source

PatentUS20240397665A1Electronic devices with a looped thermal module having a unidirectional valve
Publication Date: 2024.11.28 APPLE INC
  • US20240397665A1 patent drawing
  • US20240397665A1 patent drawing
  • US20240397665A1 patent drawing

AI summary

A thermal module may include a valve used to promote unidirectional flow. The valve may be formed from several flow barriers designed to provide minimal resistance to a refrigerant while flowing in one direction, but provide significant resistance to flow in the opposite direction. The thermal module may include a void. The refrigerant may flow or circulate in a loop around the void. Using the valve for unidirectional flow, a thermal module may provide enhanced thermal transport capabilities.