Air Outlet Assembly High-Pressure Airflow Design
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Solution Overview
Problem
Conventional electric hair dryers have slow hair drying speeds and low wind pressure, failing to meet the demand for quick hair drying and are often complex and costly to produce.
Innovation Solution
An air outlet assembly with a shell assembly, first and second air guide devices, and a motor device that forms a high-pressure airflow by diffusing air through a specific air channel design, increasing airflow efficiency and pressure for continuous supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional DC motors and common blades are used, then the structure is simple and cost is low, but the wind speed and wind pressure are low resulting in slow hair drying speed
Solution Approach 1:
The air outlet duct is segmented into multiple functional sections: air inlet channel, air passing cavity, air passing channel, and air outlet channel, each performing a specific function in the airflow path. This segmentation allows optimization of each section independently to achieve high wind pressure and speed without requiring an overly complex overall structure
Solution Approach 2:
The air guide device introduces a spatial dimension to airflow control by creating three-dimensional air passing cavities and channels that guide air flow in multiple directions. The air outlet channel extends along the axial direction of the motor, utilizing the z-dimension to create efficient airflow paths that conventional two-dimensional blade designs cannot achieve
2Productivity
If high-speed motors (110,000 RPM) are used to achieve wind speed above 20 m/s, then quick hair drying is achieved, but the product assembly becomes complicated and cost increases
Solution Approach 1:
The patent replaces the reliance on extremely high-speed motors (110,000 RPM) with a mechanically optimized airflow guidance system. The air guide device with its precisely designed cavities and channels creates efficient airflow paths that amplify the motor's output, achieving high wind speed (above 20 m/s) with a more manageable motor speed and reduced manufacturing complexity
Solution Approach 2:
The air channel parameters (cross-sectional area, length, curvature radius) are optimized to change airflow characteristics along the path. The air outlet channel's cross-sectional area is specifically designed to be 50-150 mm² with controlled curvature radius (5-15 mm) to maintain high velocity while reducing the motor speed requirement from 110,000 RPM to a more cost-effective alternative
3Loss of energy
If air channels with large curvature radius are used, then flow loss is reduced, but the air outlet duct occupies more space
Solution Approach 1:
Different sections of the air outlet duct have different curvature radius characteristics optimized for their specific function. The air passing cavity has larger curvature radius to reduce flow loss, while the air outlet channel has controlled smaller curvature radius (5-15 mm) to maintain compact size. This local optimization allows the duct to achieve low flow loss without occupying excessive space
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 enhances airflow efficiency, reducing flow loss and improving air volume, enabling faster hair drying with a high-pressure airflow for continuous supply, while also simplifying assembly and reducing costs.
Implementation Method 1
the motor device is configured to generate airflow towards the second opening from the third opening
Data Source
AI summary
The present disclosure provides an air outlet assembly, including a shell assembly, a first air guide device is arranged inside the mounting cavity of the shell assembly and provided with an air passing cavity, a second opening and a third opening are formed in the first air guide device; at least a part of a second air guide device stretches into the air passing cavity of the first air guide device, one section that the second air guide device stretches into the air passing cavity is a first air guide section, and one section that the second air guide device is located outside the first air guide device is a second air guide section; and a motor device stretches into the air passing cavity from the third opening, and at least a part of the motor device is arranged in the air passing cavity.