Annular Deflector Diffusion Tube for Hair Dryer Airflow

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Solution Overview

Problem

Existing hair dryers, particularly blower brushes, suffer from uneven air distribution and non-uniform temperature, leading to inefficiencies and increased noise during operation, causing user fatigue and discomfort.

Innovation Solution

An accessory with an elongated diffusion tube featuring annular deflectors and strategically arranged diffusion openings, which ensures homogeneous air distribution by reducing pressure drops and noise, achieved through a combination of annular deflectors and spacers that guide air flow uniformly along the tube.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a high-powered motor-fan unit is used to achieve good air diffusion through the attachment's openings, then drying efficiency is improved, but noise level increases significantly

Engineering Contradiction:

Improvedrying efficiencyVSAvoidnoise level

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The diffusion attachment is segmented into multiple sections with multiple annular deflectors spaced along the diffusion chamber. Each deflector creates localized diffusion zones, distributing the air flow more evenly and reducing the need for high overall power while maintaining effective drying.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different sections of the diffusion chamber have different configurations of deflectors and openings tailored to local requirements. The deflectors are positioned and sized to create optimal local air distribution patterns, improving overall efficiency without requiring uniform high power throughout.

Inventive Principle:

Principle #3Local quality

2Productivity

If conventional deflection means with solid centers are used to direct air towards diffusion openings, then air diffusion is enhanced, but pressure losses increase

Engineering Contradiction:

Improveair diffusion qualityVSAvoidpressure loss

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The solid center portion of conventional deflectors is removed, creating annular deflectors with central openings. This extraction eliminates the obstruction in the center that caused pressure losses, allowing air to flow through the center while still maintaining the deflection function at the periphery.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using solid deflectors that block and redirect air, the invention uses annular deflectors that allow air to pass through the center. This inverts the conventional approach by making the deflector permeable rather than obstructive, reducing pressure losses while maintaining diffusion effectiveness.

Inventive Principle:

Principle #13The other way round (Inversion)

3Productivity

If air deflection devices with radial fins are incorporated to enhance diffusion, then air distribution is improved, but device complexity increases

Engineering Contradiction:

Improveair diffusion effectivenessVSAvoidattachment structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The complex radial fin structure is replaced by multiple simpler annular deflectors positioned at different locations. Each deflector is a simple ring-shaped component, and their combined effect achieves the desired diffusion without requiring complex individual elements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple simple annular deflector functions are combined to achieve the diffusion effect that would otherwise require a single complex deflection device. The cumulative effect of several simple components replaces what would be a complicated single component.

Inventive Principle:

Principle #5Merging (Combining)

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 air distribution homogeneity, reduces the power required for the motor-driven fan, and decreases noise, resulting in improved drying performance and user comfort.

Implementation Method 1

air deflection means arranged inside the diffusion chamber... the deflection means comprise at least one annular deflector comprising a central opening and the outer circumference of each annular deflector is in contact with the peripheral wall

Methodology Applied

Scientific EffectFluid flow guidance:

Data Source

PatentEP3097816B1Accessory for blowing hairstyling device and device provided with same

Publication Date: 2019.03.06 SEB SA

Figure 1~2
Figure 3~5

AI summary

The invention relates to an accessory for a blow-drying hair styling device, comprising: - an elongated diffusion tube (21) with axis Δ, which includes: - an open end (22) for adaptation to the hair styling device and the opposite end (23) being at least partially closed, - between the adaptation end (22) and the opposite end (23), an air diffusion chamber (25) with axis Δ, - lateral air diffusion openings (27) provided in the peripheral wall (26) of the diffusion chamber (25), - air deflection means (30) disposed inside the diffusion chamber (25). According to the invention, the deflection means (30) comprise at least one annular deflector (31, 32, 33) comprising a central opening (35). The invention also relates to a hair styling device equipped with such an accessory.