Hair Dryer Diffuser Diaphragm for Laminar Air Flow
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Solution Overview
Problem
Existing diffuser devices for cosmetic liquids with hair dryers fail to provide uniform air flow and heat distribution due to the formation of Dean vortices, leading to non-uniform styling and increased time for hairdressers to achieve desired hairstyles.
Innovation Solution
A diffuser device with a cylindrical barrel housing a diaphragm featuring a transverse septum with central expansion and lateral lobes, which channels air into two streams, eliminating Dean vortices and ensuring uniform air flow and heat distribution by maintaining longitudinal velocity and heat uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a concentrator nozzle with thin end shape is used to style hair, then hair setting capability is improved, but air flow uniformity deteriorates due to Dean vortices formation
Solution Approach 1:
The concentrator nozzle is divided into multiple longitudinal channels separated by septa. This segmentation breaks the single large vortex into multiple smaller flow paths, preventing the formation of large-scale Dean vortices while maintaining the concentrated air flow needed for effective hair styling.
Solution Approach 2:
Different regions of the nozzle are given different functions: the outer regions contain cosmetic liquid reservoirs with applicator elements for localized product application, while the central region provides concentrated air flow for styling. This local differentiation allows simultaneous achievement of uniform cosmetic distribution and effective hair setting.
2Adaptability or versatility
If cosmetic liquid reservoirs are added to the hair dryer device, then cosmetic product application capability is improved, but device complexity increases
Solution Approach 1:
The cosmetic liquid reservoirs and applicator elements are merged with the concentrator nozzle structure itself. The applicator elements are integrated into the nozzle walls, and the reservoirs are positioned to work in conjunction with the air flow paths, creating a unified device that performs both air styling and cosmetic application functions.
Solution Approach 2:
The concentrator nozzle is designed to serve multiple functions: concentrating and directing air flow for hair styling, storing cosmetic liquids in integrated reservoirs, and applying cosmetics through built-in applicator elements. This multi-functionality reduces the need for separate devices and accessories.
3Speed
If Dean vortices are formed in the concentrator, then air flow concentration is improved, but heat distribution uniformity deteriorates
Solution Approach 1:
The concentrator is segmented into multiple longitudinal channels by septa, which divide the concentrated air flow into several parallel streams. This segmentation prevents the formation of large rotating Dean vortices that cause uneven heat distribution, while still maintaining the high velocity and concentration of air flow needed for effective styling.
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 allows for faster and more uniform styling, enabling even distribution of cosmetic products and reducing the need for multiple passes, resulting in improved hair shine and reduced time for hairdressers.
Implementation Method 1
the formation of Dean vortices, leading to non-uniform styling
Implementation Method 2
channeled to the outlet of said device with laminar motion
Implementation Method 3
a heating resistance, an air injection nozzle, a fan to inject air through the resistance support and the nozzle
Implementation Method 4
a fan to inject air through the resistance support and the nozzle
Data Source
AI summary
Diffuser device for cosmetic liquids for hair dryers, characterized in that it comprises a cylindrical barrel, which can be associated with the blowing part of a hair dryer; said cylindrical barrel housing a diaphragm comprising a transverse septum which has a central expansion and lateral lobes; said lateral lobes defining respective lateral passages; said lateral passages and said transverse septum causing the air produced by said blowing part to pass in the form of two flows channeled to the exit of said device with laminar motion. The device makes passage of the air that passes through it more uniform in pressure and temperature, and at the same time enables cosmetic products to be dispensed for hair treatment.