Solar Hat Fan Airflow Direction and Structural Design
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Solution Overview
Problem
Existing solar-powered hats with integrated fans do not optimize airflow for maximum cooling, as the fan direction is often ineffective and the fans are typically flimsy, leading to insufficient airflow and potential heat-related issues.
Innovation Solution
A combined solar-powered fan and hat arrangement featuring a straw hat with a unique brim design and a motorized fan that channels stagnant air upward, paired with external solar panels for power, ensuring efficient airflow and structural rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fan is positioned to direct airflow at the wearer's face, then sweat is prevented from running into eyes, but the cooling effect is not maximal
Solution Approach 1:
The patent changes the airflow direction from horizontal (at the face) to vertical (across the top of the head) by positioning the fan to blow air upward and backward. This dimensional change in airflow direction allows the cooling air to pass over the crown of the head, maximizing heat loss through the scalp while still providing facial cooling through the brim's downward slope.
Solution Approach 2:
The patent applies different functions to different parts of the hat: the brim's downward slope directs airflow across the face, while the raised head region with its opening allows air to pass through the crown. This local differentiation of airflow paths optimizes cooling in multiple areas simultaneously.
2Weight of moving object
If a flimsy plastic fan is used, then the hat remains lightweight, but the fan cannot create significant airflow over extended periods
Solution Approach 1:
The patent replaces the flimsy plastic fan with a more durable, rigid fan structure that can maintain significant airflow over extended periods. The fan is integrated into the raised head region and designed to withstand prolonged operation, sacrificing some weight consideration for sustained cooling performance.
3Strength
If the fan blades are made rigid for durability, then the fan structure becomes stronger, but the fan may become heavier and more complex
Solution Approach 1:
The patent uses a composite construction for the fan, integrating a rigid support structure (such as a plastic or metal framework) with flexible blade elements. This allows the fan to maintain structural strength and durability while keeping the overall weight manageable. The rigid framework provides structural integrity, while the blade material is optimized for both strength and weight considerations.
4Object-affected harmful factors
If the hat completely covers the head, then UV protection is maximized, but heat cannot escape leading to heat exhaustion
Solution Approach 1:
The patent creates a localized opening in the raised head region that allows heat and moisture to escape from the top of the head while the rest of the hat brim remains intact for UV protection. This local differentiation enables simultaneous achievement of sun protection and heat dissipation.
Solution Approach 2:
The opening in the raised head region acts as an intermediary channel that allows thermal energy and moisture vapor to escape from the head while the brim continues to provide UV shielding. This intermediary opening resolves the contradiction between complete coverage for protection and ventilation for heat escape.
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 enhanced cooling by directing airflow across the head, reducing heat exhaustion and skin cancer risks, while being comfortable and reasonably priced for extended outdoor use.
Implementation Method 1
a solar panel positioned on the brim of the hat... the solar panel being connected to a motorized fan
Implementation Method 2
a motorized fan positioned within the raised head region... channeling the humid and stagnant air upward
Data Source
AI summary
An apparatus includes a hat including a unitary brim that is provided with spaced inner and outer edges defining a slope traveling downwardly and outwardly towards the outer edge. The hat further includes a raised head region including a pair of spaced and coextensive apex regions and a trough intercalated therebetween. The hat has an oblong opening disposed at the rear of the head region for allowing air to flow outwardly from the head region at a rate equal to at least twice an inlet air flow rate. A motorized fan is mounted to a front side of the head region and subjacent to the trough. Solar panels are connected to a top surface of the brim. A sleeve is formed along an interior surface of the hat that extends from the solar panels and is connected to the fan for housing electrical leads coupled thereto.