Hair Dryer Diffuser With Multi-Directional Projections
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Solution Overview
Problem
Conventional hair dryers with diffusers often lead to uneven heat distribution and prolonged drying times due to unbalanced airflow velocity, potentially causing damage to hair by concentrating heat in certain regions.
Innovation Solution
A diffuser design featuring inner and outer projections arranged in annular arrays around a central grille, emitting airflow in various directions to create a vortex effect, ensuring balanced airflow and heat distribution without heat sinks or dead airflow regions, with intermediary projections providing additional balance and an ergonomic, aesthetically pleasing design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional diffuser design with simple grille and baffle is used, then device complexity is reduced, but airflow distribution becomes unbalanced causing heat concentration in certain regions
Solution Approach 1:
The diffuser is segmented into multiple functional zones: a central portion with a first array of air outlets, a peripheral region with a second array of air outlets, and an intermediate region with a third array of air outlets. This segmentation allows different regions to contribute differently to airflow distribution, achieving balanced heat distribution without excessive complexity.
Solution Approach 2:
Different regions of the diffuser are assigned different qualities and functions: the central portion emits airflow in a first direction, the peripheral region emits airflow in a second direction, and the intermediate region emits airflow in a third direction. This local differentiation optimizes airflow distribution across the entire diffuser surface.
2Productivity
If airflow velocity is not reduced properly, then drying speed increases, but heat distribution becomes uneven causing hair damage
Solution Approach 1:
The diffuser divides the airflow into multiple streams through separate arrays of air outlets in different regions. Each array emits airflow in different directions, creating multiple lower-velocity streams that distribute heat more evenly across the hair, preventing concentration damage while maintaining overall drying efficiency.
Solution Approach 2:
The diffuser utilizes three-dimensional spatial distribution by arranging air outlets in central, peripheral, and intermediate regions that emit airflow in different directions (first, second, and third directions respectively). This multi-directional approach distributes heat across multiple spatial dimensions, preventing hot spots while maintaining drying productivity.
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 diffuser achieves faster hair drying with consistent heat treatment by distributing airflow evenly, reducing the risk of hair damage and enhancing user experience through balanced airflow and improved airflow distribution.
Implementation Method 1
The baffle has an air inlet end, an air outlet end which is larger than the air inlet end, and a tapering wall which extends between the air inlet end and the air outlet end. The wall of the baffle defines a diffusing air chamber within which the velocity of the airflow decreases as the cross-section of the air chamber increases.
Implementation Method 2
A diffuser design featuring inner and outer projections arranged in annular arrays around a central grille, emitting airflow in various directions to create a vortex effect
Data Source
AI summary
A diffuser for attachment to an airflow outlet end of a hair dryer has an air inlet, a grille having a central portion and a plurality of air outlets for emitting a first part of the airflow; and a plurality of projections upstanding from the grille for contacting hair and emitting a second part of the airflow. The projections include a set of inner projections arranged about the central portion of the grille, and a set of outer projections arranged about the inner projections. The air outlets of a first subset of inner projections are arranged to emit air away from the central portion of the grille and the air outlets of a second subset of inner projections are arranged to emit air towards the central portion of the grille. The air outlets of the outer projections are arranged to emit air towards the central portion of the grille.