Integral Heat Pipe Heatsink for Uniform Cooling in Restricted Spaces
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Solution Overview
Problem
In electronic devices, the increasing heat generation due to high-density component mounting and limited installation space for heatsinks leads to inadequate cooling performance, especially when forbidden regions are present, resulting in uneven heat distribution and potential dry-out of the heat receiving portion.
Innovation Solution
A heatsink design featuring a heat transport member with an integral internal space filled with a working fluid, a wick structure extending from the heat receiving to the radiating portion, and strategically placed step portions to facilitate even heat input and prevent dry-out, while allowing for efficient heat transfer to a radiating fin group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a heat pipe group with many heat pipes is arranged in parallel to improve cooling performance, then heat transport capacity is improved, but heat reception becomes uneven and dry-out occurs in the heat receiving portion
Solution Approach 1:
Multiple heat pipes are merged into a single heat transport member with an integral internal space filled with working fluid. This combines the heat transport functions of multiple individual heat pipes into one unified structure, ensuring uniform heat distribution across the heat receiving portion while maintaining high cooling capacity.
Solution Approach 2:
The heat transport member serves multiple functions simultaneously: it acts as both the heat pipe group for heat transport and the containment structure for the working fluid. The integral internal space design ensures that the working fluid distributes heat uniformly across the entire heat receiving portion, preventing dry-out while maintaining high cooling performance.
2Adaptability or versatility
If the heat insulating portion and heat radiating portion are transferred away from the substrate to avoid forbidden regions, then adaptability to forbidden regions is improved, but heat radiation performance deteriorates in narrow spaces
Solution Approach 1:
The heat radiating portion is extended in the vertical direction (away from the substrate) to navigate around forbidden regions on the substrate plane. This dimensional transition allows the heat radiating fins to be positioned above forbidden regions while still maintaining effective heat radiation surface area and performance.
Solution Approach 2:
Different portions of the heat transport member have different spatial positions: the heat receiving portion remains close to the substrate for efficient heat absorption, while the heat radiating portion extends vertically to avoid forbidden regions. This localized spatial differentiation allows the structure to adapt to forbidden regions without compromising heat radiation performance.
3Adaptability or versatility
If the heat radiating portion is positioned below the heat receiving portion (top heat position), then adaptability to forbidden regions is improved, but working fluid reflux is blocked and dry-out occurs
Solution Approach 1:
The heat transport member is designed with the heat radiating portion positioned above the heat receiving portion, creating a gravitational potential gradient that facilitates natural convection and reflux of the working fluid. This positioning ensures that condensed liquid working fluid can naturally flow back to the heat receiving portion without being blocked by gravity, maintaining reliable working fluid circulation.
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 enhances heat radiation performance, equalizes heat input, reduces thermal resistance, and prevents dry-out, even in environments with limited installation space and forbidden regions, ensuring uniform cooling of the heating element.
Implementation Method 1
a heat transport member having a heat receiving portion thermally connected to a heating element; and a heat radiating fin group which is connected to a heat radiating portion of the heat transport member
Implementation Method 2
heat of a heating element is transported by a heat transport member from a heat receiving portion of the heat transport member to a heat radiating portion of the heat transport member
Implementation Method 3
a wick structure extended from the heat receiving portion to the heat radiating portion is housed in the internal space of the heat transport member
Implementation Method 4
a heat radiating fin group which is connected to a heat radiating portion of the heat transport member and in which a plurality of heat radiating fins is arranged
Implementation Method 5
heat radiation performance of the heat radiating fins is not sufficiently acquired
Data Source
AI summary
The present disclosure is to provide a heatsink that can improve heat radiation performance of a heat radiating fin while preventing dry-out of a heat receiving portion and that can equalize a heat input in the heat receiving portion in an environment in which an installation space of the heatsink is limited even when a forbidden region exists in the installation space.A heatsink including: a heat transport member having a heat receiving portion thermally connected to a heating element; and a heat radiating fin group which is connected to a heat radiating portion of the heat transport member and in which a plurality of heat radiating fins is arranged, wherein the heat transport member has an integral internal space that communicates from the heat receiving portion to the heat radiating portion and that is filled with a working fluid, a wick structure extended from the heat receiving portion to the heat radiating portion is housed in the internal space of the heat transport member, and the heat transport member has a heat radiating-side step portion, in which a step is provided in a direction that is not a direction parallel to a heat transport direction of the heat transport member, between a heat insulating portion placed between the heat receiving portion and the heat radiating portion and the heat radiating portion, the heat radiating portion being placed on a side of an installation surface of the heatsink compared to the heat insulating portion.