Vapor Chamber Wick Structure for Against-Gravity Refrigerant Return
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Solution Overview
Problem
Conventional heat dissipation apparatuses, such as vapor chambers, face limitations in distributing liquefied refrigerant opposite to gravity, leading to inefficient heat dissipation and complex manufacturing processes.
Innovation Solution
A heat dissipation apparatus featuring a heat conduction panel body with a refrigerant flow space and an absorber that distributes liquefied refrigerant opposite to gravity using its absorption rate and frame retention part to maintain shape and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wick member is integrated with refrigerant flow space using sintering method to distribute liquefied refrigerant, then refrigerant distribution capability is improved, but manufacturing complexity and installation difficulty increase
Solution Approach 1:
The absorber is divided into two separate components: a wick member for refrigerant distribution and a frame member for structural support. This segmentation allows each component to be optimized independently and simplifies manufacturing and assembly processes while maintaining effective refrigerant distribution
Solution Approach 2:
The wick member and frame member are combined to form an integrated absorber assembly that functions as a complete unit. The wick member is inserted into the frame member, creating a unified structure that provides both refrigerant distribution and structural support without requiring complex integration processes
2Volume of moving object
If heating elements are arranged vertically in gravity direction, then space utilization is improved, but liquefied refrigerant distribution becomes uneven due to gravity
Solution Approach 1:
The wick member generates capillary forces that counteract gravitational effects, enabling uniform refrigerant distribution even when heating elements are arranged vertically. The capillary action in the wick pores creates upward force that balances the downward gravitational force on the liquefied refrigerant
Solution Approach 2:
The wick member is positioned at specific locations within the refrigerant flow space to create localized refrigerant distribution points. This ensures that each heating element receives adequate refrigerant supply regardless of its vertical position, addressing the gravity-induced distribution imbalance
3Reliability
If absorber material absorbs liquefied refrigerant, then refrigerant distribution is improved, but absorber shape deforms under gravity
Solution Approach 1:
The absorber is segmented into a wick member that handles refrigerant absorption and a frame member that provides structural support. This separation allows the wick member to be made of highly absorbent material without compromising shape stability, as the frame member bears the mechanical load
Solution Approach 2:
The absorber combines two different materials: a porous wick material for refrigerant absorption and a structurally sound frame material for shape maintenance. This composite structure leverages the strengths of each material while compensating for their weaknesses
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 apparatus achieves improved heat dissipation performance by enhancing gas-liquid circulation and allowing for flexible arrangement of heating elements, while maintaining productivity and reducing complexity in manufacturing.
Implementation Method 1
a wick member in which multiple pores have been formed is integrated with a space (refrigerant flow space) in which a liquefied refrigerant and a gaseous refrigerant are circulated by a sintering method and the liquefied refrigerant is distributed by using surface tension properties of liquids
Implementation Method 2
an absorber disposed in the refrigerant flow space of the heat conduction panel body and configured to distribute a liquefied refrigerant included in the refrigerant in a direction of gravity or at least in a direction opposite to the direction of gravity while absorbing and retaining the liquefied refrigerant. The absorber maintains an absorption rate for the liquefied refrigerant by a material itself
Implementation Method 3
the state of a liquefied refrigerant is changed into the state of a gaseous refrigerant at a portion closest to heating elements, that is, a target for heat dissipation
Implementation Method 4
a heat conduction panel body in which a refrigerant flow space where a liquefied refrigerant and a gaseous refrigerant are circulated while a state of a refrigerant filled therein is changed has been formed
Data Source
AI summary
The present invention relates to a heat dissipation apparatus for an electronic device. In particular, the heat dissipation apparatus comprises: a heat conduction panel body having formed therein a refrigerant flow space in which, while charged refrigerant changes in phase, gas-liquid circulation takes place; and an absorber which is disposed in the refrigerant flow space of the heat conduction panel body, and which distributes, while absorbing and holding the liquefied refrigerant of the refrigerant, the liquefied refrigerant in the direction of gravity or at least in a direction opposite to the direction of gravity, wherein, due to the material itself, the absorber prevents shape deformation in the direction of gravity even while maintaining the absorption rate for the liquefied refrigerant, and thus, provided is the advantage of greatly improving overall heat dissipation performance.