Two-Layer Wearable Cushion With Enthalpy-Based Heat Storage
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Solution Overview
Problem
Wearable devices tend to accumulate heat, leading to discomfort during extended use due to increased temperature, which existing technologies have not adequately addressed.
Innovation Solution
A cushion for wearable devices is designed with an outer cover layer and inner cushion, where the enthalpy difference between the two layers exceeds 45 J/g, utilizing heat conducting and storage materials to dissipate heat away from the user's skin effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If heat storage materials are added to the cushion, then heat storage capacity is improved, but device complexity increases
Solution Approach 1:
The cushion employs composite materials by integrating heat storage materials (phase change materials) into the cushion structure. The outer cover layer contains a first heat storage material dispersed in a first base material, while the inner cushion contains a second heat storage material dispersed in a second base material, creating a multi-component composite structure that enhances heat storage capacity without excessive complexity
Solution Approach 2:
Different regions of the cushion have different heat storage properties. The outer cover layer has lower enthalpy (≤5 J/g) to provide initial heat absorption, while the inner cushion has higher enthalpy to provide sustained heat storage. This local differentiation of material properties optimizes the overall thermal management performance
2Temperature
If heat storage materials are added to the cushion, then temperature control is improved, but manufacturing complexity increases
Solution Approach 1:
The invention controls the enthalpy parameter of different cushion layers to achieve temperature control. The outer cover layer is designed with enthalpy ≤5 J/g, while the inner cushion has enthalpy greater than the outer cover layer by more than 45 J/g. By controlling these specific parameter ranges, the cushion achieves effective temperature management during extended wear
Solution Approach 2:
The cushion uses composite materials with heat storage properties embedded in base materials. The heat storage materials are dispersed within the base materials of both the outer cover layer and inner cushion, creating a manufacturable composite structure that maintains flexibility while providing temperature control functionality
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 enthalpy difference enhances heat storage capacity, allowing the cushion to maintain lower temperatures and improve user comfort during prolonged wear by efficiently dissipating heat.
Implementation Method 1
The outer cover layer includes a first base material, a heat conducting material, and a first heat storage material. The heat conducting material and the first heat storage material are dispersed within the first base material.
Implementation Method 2
The outer cover layer includes a first base material, a heat conducting material, and a first heat storage material. The heat conducting material and the first heat storage material are dispersed within the first base material. The enthalpy of the outer cover layer is less than or equal to 5 J/g.
Implementation Method 3
The enthalpy of the outer cover layer is less than or equal to 5 J/g. The inner cushion includes a second base material and a second heat storage material, with the second heat storage material dispersed within the second base material. The enthalpy of the inner cushion is greater than that of the outer cover layer. The difference between the enthalpy of the inner cushion and that of the outer cover layer exceeds 45 J/g.
Data Source
AI summary
A cushion for a wearable device includes an outer cover layer and an inner cushion. The outer cover layer includes a first base material, a heat conducting material and a first heat storage material. The heat conducting material and the first heat storage material are dispersed in the first base material. The enthalpy value of the outer cover layer is less than or equal to 5 J/g. The inner cushion includes a second base material and a second heat storage material. The second heat storage material is dispersed in the second base material. The enthalpy value of the inner cushion is greater than that of the outer cover layer. The difference between the enthalpy value of the inner cushion and the enthalpy value of the outer cover layer is greater than 45 J/g.