Passive Cooling Face Cover for Heat-Limited Head-Wearables
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Solution Overview
Problem
Head-wearable devices face thermal management challenges due to high heat generation from internal components, which compromises performance, lifespan, and user comfort, and conventional cooling methods like fans increase power consumption, size, and noise, hindering ergonomic design.
Innovation Solution
A passive cooling solution using a hydrogel material that absorbs moisture and evaporates it to cool electronics components, integrated with a passive cooling surface cover that contacts the user's body to dissipate heat, optionally combined with active cooling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling methods like fans are used, then heat dissipation is improved, but power consumption increases
Solution Approach 1:
The patent replaces the mechanical fan-based cooling system with a passive evaporative cooling system using hydrogel material. The hydrogel absorbs moisture from the environment and evaporates it to cool the electronics components, eliminating the need for mechanical moving parts and significantly reducing power consumption while maintaining effective heat dissipation
Solution Approach 2:
The patent utilizes the phase transition of water from liquid to vapor through the hydrogel material. The hydrogel absorbs moisture and undergoes evaporative cooling, where the phase change from liquid water to water vapor absorbs heat from the electronics components, providing passive cooling without additional power consumption
2Temperature
If conventional cooling methods like fans are used, then heat dissipation is improved, but device size increases
Solution Approach 1:
The patent replaces the bulky mechanical fan assembly with a thin, flexible hydrogel layer that can be directly applied to the housing or contact surface. This substitution dramatically reduces the volume required for cooling functionality, enabling compact head-wearable device design while maintaining effective heat dissipation
Solution Approach 2:
The patent employs a thin-film hydrogel material that can be conformally applied to the device housing or contact surface. This thin-film approach provides effective cooling functionality with minimal thickness, avoiding the bulk associated with traditional fan-based cooling systems and enabling sleek, compact wearable device design
3Temperature
If conventional cooling methods like fans are used, then heat dissipation is improved, but noise increases
Solution Approach 1:
The patent eliminates the mechanical fan system entirely and replaces it with a passive evaporative cooling mechanism using hydrogel material. Since the hydrogel-based system has no moving parts, it generates no operational noise, providing a quiet cooling solution that maintains effective heat dissipation while eliminating the noise harmfully generated by conventional fans
4Volume of moving object
If device size is reduced for ergonomics, then user comfort is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent applies a thin-film hydrogel cooling layer to the device housing or contact surface, providing effective heat dissipation functionality with minimal thickness. This thin-film approach enables compact device design while maintaining adequate cooling capability, as the hydrogel material efficiently absorbs and evaporates moisture to remove heat from the electronics components
Solution Approach 2:
The patent applies cooling functionality locally at the contact surface or housing areas where heat is generated, rather than requiring a large-scale cooling system throughout the device. The hydrogel material is strategically positioned to provide targeted cooling where needed, enabling compact overall device design while maintaining effective heat dissipation at critical locations
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 solution provides effective thermal management with reduced device size, weight, and noise, enhancing user comfort and device performance by maintaining lower operating temperatures.
Implementation Method 1
evaporate a stored moisture using the heat generated by the one or more electronics components
Implementation Method 2
absorb heat generated by the one or more electronics components and transferred to the user-facing contact surface
Implementation Method 3
absorb heat generated by the one or more electronics components and transferred to the user-facing contact surface
Data Source
AI summary
A head-wearable device allowing for passive cooling at a face cover of the head-wearable device is described herein. The head-wearable device comprises a housing and a passive cooling surface cover coupled to a user-facing surface of the housing such that, when the head-wearable device is worn, the passive-cooling surface cover contacts a portion of a user's body. The housing includes one or more electronics components and the user-facing surface. The passive cooling surface cover is configured to (i) absorb heat generated by the one or more electronics components and transferred to the user-facing contact surface and (ii) evaporate a stored moisture using the heat generated by the one or more electronics components to decrease a temperature of the one or more electronics components and/or the passive cooling surface cover.