Bladeless Fan Nozzle with Diffuser and Guide Portion
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Solution Overview
Problem
Conventional fans with rotating blades produce uneven air flow, leading to noise and reduced cooling effectiveness, and occupy valuable space, while also blocking light and being difficult to clean.
Innovation Solution
A bladeless fan assembly featuring a nozzle with a diffuser and guide portion that directs air flow uniformly, utilizing a Coanda surface to amplify airflow and reduce noise, allowing for focused cooling without the need for moving blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If rotating blades are used to generate air flow, then cooling effect is produced, but air flow becomes uneven and noisy
Solution Approach 1:
The patent removes the rotating blades entirely from the fan assembly, extracting the source of noise and uneven air flow. Instead of using blades to generate air flow, the invention uses a stationary nozzle system that directs air flow smoothly without the harmful effects of rotating components.
Solution Approach 2:
The patent replaces the mechanical rotating blade system with a stationary nozzle system that uses fluid dynamics principles. The nozzle includes a diffuser portion and guide portion that shape and direct air flow without mechanical moving parts, eliminating noise while maintaining cooling effectiveness.
2Temperature
If fan base is made larger to provide stable air flow, then cooling effectiveness improves, but space occupancy increases
Solution Approach 1:
The patent changes the geometric parameters of the nozzle, specifically incorporating a diffuser portion with a gradual expansion angle and a guide portion with specific angulation. These parameter optimizations enable effective air flow direction and cooling performance within a compact base area, eliminating the need for large fan structures.
3Ease of operation
If nozzle structure is added to direct air flow, then cooling directionality improves, but device complexity increases
Solution Approach 1:
The patent segments the nozzle into distinct functional portions: a diffuser portion for expanding and smoothing air flow, and a guide portion for directing the air flow at specific angles. This segmentation provides precise cooling directionality while keeping each portion structurally simple and easy to manufacture.
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 provides a quiet, efficient, and compact cooling solution that directs air flow uniformly, enhancing the cooling effect at a distance and reducing space occupancy while maintaining a clean and unobstructed design.
Implementation Method 1
the surface comprising a diffuser portion tapering away from said axis and a guide portion downstream from the diffuser portion and angled thereto
Implementation Method 2
utilizing a Coanda surface to amplify airflow and reduce noise
Implementation Method 3
the guide portion directs the air flow towards a user's location whilst maintaining a smooth, even output without the user feeling a 'choppy' flow
Data Source
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AI summary
A bladeless fan assembly (100) for creating an air current comprises a nozzle (1) mounted on a base (16) housing means for creating an air flow through the nozzle (1). The nozzle (1) comprises an interior passage (10) for receiving the air flow from the base (16) and a mouth (12) through which the air flow is emitted. The nozzle (1) extends about an axis to define an opening (2) through which air from outside the fan assembly (100) is drawn by the air flow emitted from the mouth (12). The nozzle (1) comprises a surface over which the mouth (12) is arranged to direct the air flow. The surface comprises a diffuser portion (46) tapering away from the axis, and a guide portion (48) downstream from the diffuser portion (46) and angled thereto.