Movement-Driven Body Ventilation Pump for Extreme Heat
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Solution Overview
Problem
Current body-worn cooling technologies, such as breathable textiles and passive ventilation systems, are insufficient for managing heat buildup and sweat under protective clothing in extreme conditions, particularly in military and rescue operations, due to limitations in energy supply, noise, complexity, and restricted mobility.
Innovation Solution
An active ventilation device that uses movement-induced changes in distance between fastening points on the body and clothing to generate airflow without the need for manual or electrical actuation, employing an air pump principle with a piston and cylinder mechanism, which is compact, low-maintenance, and effective across various locomotion modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If passive ventilation principles (breathable membranes, filters) are used, then the device structure remains simple, but the cooling efficiency is insufficient under extreme temperature conditions
Solution Approach 1:
The patent employs a dynamic ventilation system where the distance between the first and second fastening means changes with user movement, automatically modulating the air flow generation mechanism. This dynamic approach allows the system to adapt ventilation intensity to actual activity levels, achieving efficient cooling under extreme conditions while maintaining relatively simple device structure through movement-driven operation rather than complex electronic controls
Solution Approach 2:
The ventilation device utilizes the user's own body movements to drive the air flow generation. The relative movement between the fastening means attached to clothing and those attached to the body automatically actuates the ventilation mechanism without requiring external power sources or complex control systems, thereby improving cooling efficiency while keeping the device structure simple
2Temperature
If battery-operated fans are used for active ventilation, then cooling efficiency improves, but the device becomes sensitive and noisy with limited energy supply
Solution Approach 1:
The patent replaces battery-operated electric fans with a mechanically-driven air flow generation system. The movement between fastening means directly actuates a mechanical pump or bellows mechanism to generate air flow, eliminating motors, batteries, and electronic controls. This substitution removes the sources of noise and sensitivity while maintaining active ventilation capability, and eliminates energy supply limitations
Solution Approach 2:
The system uses the user's body movement itself as the power source for ventilation, converting kinetic energy from natural locomotion into mechanical work that drives air flow. This self-powered approach eliminates the need for external energy sources, removing battery limitations and the associated noise and sensitivity problems while maintaining effective cooling
3Duration of action of moving object
If manually operated pumps are used, then energy supply is extended, but freedom of movement is restricted and ventilation only occurs when actuated
Solution Approach 1:
The ventilation device automatically utilizes the user's existing body movements to drive air flow generation. The relative motion between clothing-mounted and body-mounted fastening means directly actuates the pump mechanism during normal activities like walking, running, or climbing. This eliminates the need for separate manual operation while ensuring continuous ventilation during movement, extending operational duration without restricting freedom of movement
Solution Approach 2:
The system is designed to be dynamically activated by movement itself. The distance change between fastening means during natural body motion automatically triggers and sustains ventilation. This dynamic coupling ensures ventilation occurs continuously during activity without requiring deliberate user action, maintaining full freedom of movement while extending ventilation duration to match activity duration
4Temperature
If pendulum movement mechanisms are used for air flow generation, then active ventilation is achieved, but the structure becomes complex and prone to failure
Solution Approach 1:
The patent extracts the essential function of air flow generation from complex pendulum mechanisms and implements it through a simplified system based on relative movement between fastening means. By removing the oscillating suspension and complex damping mechanisms, the design achieves active ventilation through a simpler distance-change-driven approach, reducing structural complexity and failure points while maintaining ventilation capability
Solution Approach 2:
The patent replaces the complex pendulum-based mechanical system with a simpler direct movement actuation mechanism. Instead of using oscillating mass and elastic suspension to generate air flow, the system directly converts the distance change between fastening means into pump actuation. This substitution eliminates resonance issues, damping requirements, and multi-component mechanisms, achieving ventilation with a simpler, more reliable structure
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 device provides continuous and efficient ventilation, improving wearing comfort and reducing heat buildup, while being suitable for outdoor and military use, with adjustable airflow and power generation based on load and movement, and can be integrated with ballistic protection without compromising protection or mobility.
Implementation Method 1
means for generating a flow of air directed toward or away from the body... designed in such a way that the air flow is generated according to the air pump principle. The means comprise a cylinder and a piston movable therein
Implementation Method 2
a movement-related, i.e. caused by a movement, change in distance between the first and second fastening means mechanically drives the means for generating an air flow. The device according to the invention thus uses the different movement sequences that exist due to weight differences and different inertial behavior
Data Source
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AI summary
The invention relates to an active ventilating device for arranging on a user's body (1), having a first fastening means (2), which is fitted on an item of clothing or a piece of equipment (10b) worn on the body, and a second fastening means (3a, 3b), which is fitted or supported on the body, and having means for generating an air flow (4a, 4b; 5a, 5b, 6a, 6b) which is directed onto the body or away from the body. The device is distinguished in that, by virtue of a movement-induced change in distance between the first and second fastening means (2; 3a, 3b), the means for generating an air flow (4a, 4b; 5a, 5b, 6a, 6b) are driven mechanically.