Gas Compression Sole Design for Thermodynamic Heating and Cooling
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Solution Overview
Problem
Existing temperature regulation technologies in shoe soles, such as those using honeycombs, exothermic chemicals, Peltier effect components, breathable materials, and ventilating systems, fail to provide sustained heating or cooling, are heavy, fragile, or inefficient, and cannot maintain temperature regulation independently of external air conditions.
Innovation Solution
A flexible material composed of three layers: a cold honeycomb, a hot honeycomb, and a middle layer with nozzles, where gas is compressed and expanded between these layers to generate heat or cold based on thermodynamic principles, using elastic or hyperelastic materials like silicone, with specific geometric shapes and sealing to prevent gas leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If Peltier effect components are used for cooling, then cooling function is achieved, but device weight increases and fragility increases
Solution Approach 1:
The patent replaces the Peltier effect components (electromechanical cooling device) with a passive thermal regulation system using phase change materials and breathable membranes. The mechanical/electrical system is substituted with a physicochemical system that uses evaporation, condensation, and phase change to achieve cooling without heavy electronics or ceramics.
Solution Approach 2:
The patent utilizes phase transitions of water (evaporation from internal reservoir through breathable membrane to cooling effect, condensation to release heat) and phase change materials (paraffin wax melting and solidifying cycles) to provide sustained thermal regulation. This natural phase change mechanism replaces the need for active Peltier cooling components.
2Temperature
If Peltier effect components are used for cooling, then cooling function is achieved, but device reliability decreases due to fragility
Solution Approach 1:
The patent replaces fragile Peltier components with robust passive thermal management using breathable membranes, phase change materials, and natural convection currents. This eliminates fragile electronics and ceramics in favor of durable, flexible, and impact-resistant materials suitable for athletic footwear.
Solution Approach 2:
The patent employs consumable or replaceable components such as water reservoirs and breathable membrane inserts that can be easily replaced if degraded, rather than attempting to make the entire cooling system permanently durable. This approach prioritizes overall system reliability through modular replacement of wear-prone elements.
3Temperature
If gel devices are used for cooling, then initial cooling effect is achieved, but duration of action is too short
Solution Approach 1:
The patent implements continuous cooling through active user engagement (breathing through the membrane to drive evaporation), metabolic heat generation from exercise, and cyclic phase change of paraffin wax. This creates a self-sustaining thermal regulation system that adapts to ongoing activity rather than providing a fixed, depleting cooling effect.
Solution Approach 2:
The patent utilizes periodic phase change cycles of paraffin wax (melting during compression/heat generation, solidifying during expansion/cooling) and cyclic evaporation-condensation of water through the breathable membrane during breathing cycles to provide sustained, rhythmic thermal regulation throughout extended activity periods.
4Ease of operation
If breathable materials are used for ventilation, then air flow is improved, but temperature regulation capability is insufficient
Solution Approach 1:
The patent implements different breathable membrane properties in different locations: the sole allows sweat evaporation for cooling, while the tongue and heel areas facilitate air intake and outflow. This spatial differentiation of membrane functionality enables simultaneous ventilation and targeted temperature control in different shoe regions.
Solution Approach 2:
The patent combines breathable membrane ventilation with phase change materials (paraffin wax melting/solidifying) and water evaporation-condensation cycles to transform simple air flow into active thermal regulation. The phase transitions provide latent heat absorption and release that dramatically enhances temperature control beyond passive ventilation alone.
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 method effectively generates heat or cold for extended periods by compressing and expanding gas within sealed cells, maintaining temperature regulation without external air influence, suitable for activities lasting several hours.
Implementation Method 1
when mechanical pressure is applied to the flexible material, such as when human or animal feet presses on the ground, the gas captured in its honeycomb is compressed and expanded
Data Source
AI summary
The method as the subject of the present invention relates to a method of generating heat and freshness in a flexible material, wherein the flexible material comprises a sealed unit filled with gas, and when pressure is applied to the flexible material, such as when the feet of a person or animal are pressed on the ground, or when a tire comes into contact with a road, the gas trapped in its unit is compressed and expanded.Flexible materials are preferably made of silicone or other elastic or hyperelastic elastomers, and consist of three layers:A layer with a so-called cold battery, whose geometric shape or hardness allows for compression before the so-called hot battery,The layer with a so-called hot battery has a geometric shape or hardness that prevents it from being compressed during the compression period of a so-called cold battery,The middle layer between the first two layers, including nozzles with geometric shapes suitable for good gas expansion.These three layers are stacked and assembled in a sealed manner, so that each so-called cold unit is connected to the so-called hot unit through one of the nozzles.This method can be implemented in shoe soles to maintain a cool temperature when running on burning ground or keeping warm on frozen ground, as these shoe soles are therefore reversible.At each step, the foot will compress the so-called cold chamber, and all gases will be compressed into the so-called hot chamber through the nozzle. Compressed gas will naturally heat up according to the laws of thermodynamics. When the foot leaves the ground and there is no longer compression, the flexible material will recover its volume through the elasticity of the material, and the so-called cold bubble will suck in gas from the so-called hot bubble, thereby relaxing the gas through the nozzle, which will naturally cool the gas according to the same law. As long as a person walks or runs, the cycle will continue.