Heat Pipe Soldering with Slotted Extension Flanges

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Solution Overview

Problem

Conventional heat dissipation devices with heat pipes face reduced heat exchange efficiency due to trapped rosin content from thermal medium materials between metal fins and heat pipes, as there are no channels for discharge during soldering.

Innovation Solution

The heat dissipation device features metal fins with apertures and extension flanges that include slits, allowing rosin content from the thermal medium to be released during soldering, enhancing the connection between heat pipes and metal fins.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the heat pipe is soldered to the metal fins using thermal medium material containing rosin flux, then the joint quality between heat pipe and metal fins is improved, but the rosin content becomes trapped between the heat pipe and metal fins, reducing heat exchange efficiency

Engineering Contradiction:

Improvejoint qualityVSAvoidheat exchange efficiency

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The extension flange is segmented by forming multiple slits that divide the flange structure into multiple sections. These slits create discharge channels that allow rosin flux to escape during the soldering process, preventing trapped rosin from interfering with heat exchange while maintaining the structural integrity of the joint.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The slits in the extension flange serve as intermediary channels that facilitate the discharge of rosin flux from the soldering interface. These channels act as a mediator between the soldering process and the external environment, allowing harmful byproducts to escape without compromising the joint quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If the extension flanges are aligned to form a hermetically sealed cylinder, then the structural integrity and alignment of heat pipes with metal fins is improved, but no channels are available for discharge of rosin content during soldering

Engineering Contradiction:

Improvealignment precisionVSAvoidtrapped rosin content

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The slits are strategically positioned in specific locations on the extension flange to create localized discharge channels. This allows the majority of the flange structure to remain hermetically sealed for structural integrity, while specific local regions provide pathways for rosin discharge.

Inventive Principle:

Principle #3Local quality

3Strength

If rosin flux is used to remove oxidized layers and contaminants during soldering, then the bonding between heat pipe and metal fins is improved, but the rosin residue affects heat exchange efficiency

Engineering Contradiction:

Improvebonding strengthVSAvoidheat exchange efficiency

Core Design Contradiction:

StrengthVSLoss of energy

Solution Approach 1:

The slits in the extension flange provide channels for extracting and removing rosin flux and its residues from the soldering interface during the soldering process. This extraction mechanism eliminates the harmful byproducts while retaining the beneficial bonding effects of the flux.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The slits transform the potentially harmful trapped rosin into a beneficial discharge process. The rosin flux still performs its useful function of removing oxidized layers and contaminants, but the slits ensure that the harmful residues are discharged rather than trapped, converting a harmful situation into a beneficial one.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 ensures effective removal of rosin content, improving the thermal connection and heat exchange efficiency between heat pipes and metal fins, thereby enhancing the overall performance of the heat dissipation device.

Implementation Method 1

at least one heat pipe and a plurality of metal fins thermally connected to the heat pipe

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

The heat pipe is received in the aligned apertures and soldered by a thermally conductive material to the metal fins via the aligned extension flanges

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS7254026B2Heat dissipation device with heat pipe

Publication Date: 2007.08.07 CHAMP TECH OPTICAL (FOSHAN) CORP

AI summary

A heat dissipation device (40) includes at least a heat pipe (45) and a plurality of metal fins (43) thermally connected to the heat pipe. Each of the metal fins defines therein an aperture (431). An extension flange (433) extends outwardly from the metal fin and surrounds the aperture. The extension flange defines therein a plurality of slits (435). The apertures and extension flanges of the metal fins are aligned together. The heat pipe is received in the aligned apertures and soldered by a thermal medium material to the metal fins via the aligned extension flanges. During the soldering process, rosin content contained in the thermal medium material can be discharged away via the slits formed in the extension flange.