Helmet Head Pad Cooling Layers for Heat Buildup Relief
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Solution Overview
Problem
Existing head protection pads for helmets do not effectively provide an advantageous cooling effect, leading to reduced wearing comfort due to heat buildup.
Innovation Solution
A head protection pad design featuring a textile outer layer with integrated cooling medium, a spacer layer for enhanced cooling, and a textile inner layer, with a spacer layer thickness of 4.5 mm to 7 mm, providing improved temperature balance and sweat absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a traditional single-layer textile cover is used, then the structure is simple, but the cooling effect is insufficient leading to heat buildup
Solution Approach 1:
The cover is divided into multiple functional layers: an outer layer with cooling medium for heat absorption, a spacer layer for air circulation and insulation, and an inner layer for moisture management. This segmentation allows each layer to perform its specific function optimally, achieving effective cooling while maintaining structural organization
Solution Approach 2:
The cover combines different materials with complementary properties: phase change material (paraffin) for thermal regulation, textile fabrics for structural support and moisture absorption, and spacer materials for air flow. This composite structure integrates multiple functions into a single component system
2Temperature
If the outer layer directly contacts the inner layer, then the structure is compact, but the cooling effect and sweat absorption are reduced
Solution Approach 1:
The spacer layer acts as an intermediary between the cooling layer and the inner fabric layer. It maintains optimal spacing to allow heat transfer from the head to the cooling medium while permitting air circulation, and prevents direct contact that would reduce thermal regulation efficiency
Solution Approach 2:
The spacer layer introduces a dimensional separation in the z-direction (thickness direction), creating air gaps that enable thermal convection and radiation pathways. This dimensional approach allows heat to dissipate through multiple modes rather than direct conduction
3Temperature
If the spacer layer is too thin, then the structure is compact, but the cooling effect and drying performance are insufficient
Solution Approach 1:
The spacer layer thickness is optimized within a specific range (4.5-7 mm) to balance cooling performance and structural compactness. This parameter optimization ensures sufficient air gap for thermal convection while maintaining wearability and comfort
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 design achieves greater wearing comfort by maintaining a temperature balance between the inner fabric layer and the scalp, enhancing cooling and drying effects.
Implementation Method 1
The cooling medium is a so-called pcm (phase change material) that can absorb body heat, changing its state of matter at least partially from solid to liquid
Implementation Method 2
The paraffin changes its state from solid to liquid, thereby absorbing excess heat from the head
Implementation Method 3
The spacer layer and the resulting air cushion improve the cooling effect of the outer layer. Furthermore, it improves the drying of the outer layer and thus also its sweat absorption
Data Source
Figure 1~2b
Figure 3a~4
AI summary
The invention relates to a head guard pad (1) for inserting into a helmet (8), comprising a main part (2) made of a cushion material and a sleeve (3) which at least partly surrounds the main part (2), wherein the sleeve (3) has an outer layer (4) and at least one inner layer (5), and the outer layer (4) is designed as a cooling layer and has a cooling medium (4.1) which is integrated into the outer layer (4).