Hair Styling Appliance Plenum Airflow Heat Transfer
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Solution Overview
Problem
Hair straighteners cause heat damage and poor heat transfer due to the use of rigid heating plates, leading to inefficient styling and reduced hair volume, as hair acts as a thermal insulator and is forced to splay across plates.
Innovation Solution
A hair styling apparatus with pivoted arms featuring a plenum for high-velocity airflow that aligns hair strands and enhances heat transfer, using a fan unit to generate pressure and a system of apertures and vanes to direct airflow for even heating and styling, while a hair clamp system ensures gentle gripping to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If rigid heating plates are used in hair straighteners, then heating capability is provided, but heat transfer efficiency deteriorates because hair acts as a thermal insulator
Solution Approach 1:
The patent introduces a plenum chamber with air inlet and air outlet that directs airflow across the heating element and through the hair tress. This pneumatic system replaces direct thermal contact with convective heat transfer via airflow, overcoming the thermal insulation barrier of hair and significantly improving heat transfer efficiency while maintaining effective heating capability
Solution Approach 2:
The patent uses airflow as an intermediary medium between the heating element and the hair. The plenum chamber directs air flow to carry thermal energy from the heating element through the hair tress, acting as a mediator that transfers heat efficiently without requiring direct thermal contact, thus resolving the heat transfer efficiency problem
2Strength
If hair is gripped between two flat and rigidly fixed heating plates, then mechanical support is provided, but hair alignment deteriorates causing detrimental splaying
Solution Approach 1:
The patent replaces rigidly fixed heating plates with a dynamic system featuring a plenum chamber that can direct and adjust airflow. The air outlet directs airflow along the inner wall to dynamically adapt to the hair tress shape, providing mechanical support while maintaining proper hair alignment and preventing splaying through controlled aerodynamic forces
3Productivity
If high temperatures are used for hair styling, then styling effectiveness is improved, but heat damage to hair increases
Solution Approach 1:
The patent uses a plenum chamber with controlled airflow to deliver heat more efficiently and uniformly through the hair tress. This pneumatic system allows styling to be achieved at lower temperatures by improving heat distribution and reducing hot spots, thereby maintaining styling effectiveness while minimizing heat damage to the hair
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 apparatus effectively dries and straightens hair simultaneously at lower temperatures, reducing heat damage and increasing hair volume by improving airflow alignment and heat distribution, resulting in smoother, shinier hair with enhanced ergonomic comfort.
Implementation Method 1
The fan unit in the hair styling apparatus may generate around 3.5-3.9 kPa of pressure to create high velocity and high pressure airflow through the apparatus from the central body to the plenum in each arm.
Implementation Method 2
The high velocity, heated airflow in such a hair styling apparatus uses convection to heat the hair tress and thermal transfer is even throughout the tress.
Implementation Method 3
The laminar, blade-like airflow exiting the aperture also improves alignment of individual hair strands within the tress of hair.
Implementation Method 4
when such downward airflow interacts with a hair tress, the hair cuticles (which form the external surface of a strand of hair), are urged downwards and thus lie flat on the hair shaft.
Data Source
AI summary
A hair styling apparatus is provided and includes a first arm and a second arm pivotally coupled together and moveable between an open position and a closed position. An inner wall of the first arm is arranged to face an inner wall of the second arm. The first arm and the second arm are arranged to receive hair within a cavity therebetween. The cavity is formed between the first arm and the second arm in a closed position. At least one of the first arm and second arm include a plenum. The plenum includes an air inlet for receiving airflow from a fan unit and an air outlet configured to direct airflow towards the cavity.