Entangled Wire Heat Transfer Medium with High Poisson Ratio
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Solution Overview
Problem
Current heat transfer technologies face challenges in achieving high heat transfer rates efficiently and economically, particularly in devices that require effective heat management due to miniaturization and integration, leading to increased energy consumption and costs.
Innovation Solution
A heat transfer device utilizing a heat transfer medium with a Poisson's ratio close to 1, formed by entangling a single wire, which changes its heat transfer path upon contact with a user's body, increasing the area and reducing thickness to enhance heat transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional heat transfer materials are used, then heat transfer rate is maintained at basic level, but energy efficiency is low and economic cost is high
Solution Approach 1:
The patent applies parameter changes by utilizing a material with Poisson's ratio close to 1, which fundamentally changes the material's mechanical response to compression. When compressed by user body weight, the material's thickness decreases significantly while its contact area increases, thereby enhancing heat transfer rate and energy efficiency without requiring structural changes to the heating device
Solution Approach 2:
The heat transfer medium is designed to dynamically change its physical structure in response to external compression. The material transitions from an uncompressed state with larger thickness to a compressed state with reduced thickness and expanded contact area, enabling adaptive heat transfer optimization based on user contact pressure
2Area of stationary object
If heat transfer medium is compressed by user body contact, then contact area increases and thickness decreases improving heat transfer, but structural complexity increases
Solution Approach 1:
The heat transfer medium performs self-service by automatically adjusting its own structure in response to compression. The material inherently changes its thickness and contact area based on the applied pressure from user body contact, eliminating the need for external control mechanisms, actuators, or complex structural designs to achieve optimal heat transfer contact
3Productivity
If material structure is changed to enhance heat transfer, then heat transfer efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes parameter changes by selecting a material with Poisson's ratio close to 1, which is a fundamental material property rather than a complex structural design. This approach simplifies manufacturing because the enhanced heat transfer efficiency is achieved through the material's inherent mechanical response to compression rather than through complicated geometric structures or assembly processes
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 allows for rapid heat transfer to a user's body without requiring structural changes in the heat generating device, improving energy efficiency by altering the material's structure in contact with the user, thereby reducing thermal resistance and maintaining heat storage.
Implementation Method 1
a heat transfer medium provided between the heat generating device and the cover to transfer the heat generated by the heat generating device
Implementation Method 2
the heat transfer medium is a structure that is compressed in an axial direction when being in contact with the body of the user and thus has a Poisson's ratio of 0.5 or higher
Data Source
AI summary
An embodiment relates to a heat transfer device including a heat generating device configured to generate heat having predetermined intensity by a user, a cover in contact with a body of the user while covering the heat generating device, and a heat transfer medium provided between the heat generating device and the cover to transfer the heat generated by the heat generating device, wherein the heat transfer medium is a structure that is formed by entangling a single wire having a predetermined length and has a predetermined width and a predetermined height, and is a structure that is compressed in an axial direction when being in contact with the body of the user and thus has a Poisson's ratio of 0.5 or higher. Thus, a structural change in the heat generating device is not required and only a material in contact with the heat generating device is changed, so that generated heat may more rapidly reach the body of the user.