Bladeless Fan Nozzle with Spacers for Uniform Airflow
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Solution Overview
Problem
Conventional fans produce uneven air flow, leading to discomfort and noise, and their bulky design occupies valuable space, obstructs light, and poses cleaning challenges due to caged blades.
Innovation Solution
A bladeless fan assembly featuring a nozzle with integral spacers and a Coanda surface that directs air flow, providing a smooth, linear, and focused cooling effect without the need for blades, and a compact design that allows for efficient air circulation and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fans with blades and cages are used, then air circulation is achieved, but the design becomes bulky and occupies significant space
Solution Approach 1:
The patent removes the traditional blade structure and safety cage from the fan design. Instead of using blades to move air, the invention uses a different mechanism (likely a membrane or flexible structure) that eliminates the need for bulky protective cages, thereby reducing the overall volume and space occupation of the fan while maintaining air circulation functionality
Solution Approach 2:
The patent replaces the conventional mechanical blade-based air movement system with an alternative mechanism. The description mentions a membrane structure that responds to acoustic or other non-contact forces, substituting the traditional mechanical blade-cage system with a more compact design that achieves the same air circulation effect
2Productivity
If conventional fans with blades are used, then air flow is generated, but the air flow becomes uneven and choppy
Solution Approach 1:
By removing the blade structure entirely, the patent eliminates the source of choppy and uneven air flow. The alternative mechanism (membrane or acoustic-driven structure) generates a smoother, more uniform air flow pattern without the pulsating effects characteristic of rotating blades
Solution Approach 2:
The patent changes the fundamental operating parameters of the air movement system. Instead of high-speed rotating blades creating turbulent flow, the invention uses a different physical principle (acoustic radiation pressure or membrane vibration) that produces steadier, more uniform air flow with different velocity and pressure characteristics
3Object-affected harmful factors
If conventional fans with cages are used, then safety is improved, but cleaning becomes difficult
Solution Approach 1:
The patent removes the safety cage structure entirely by eliminating the blades that require protection. The alternative mechanism used (membrane or acoustic system) has no exposed moving parts that need caging, and the design allows for easy access and cleaning of the air intake and output surfaces without disassembling protective structures
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 fan assembly delivers a consistent, comfortable air flow with reduced turbulence and noise, enhancing user experience by providing effective cooling while minimizing space usage and simplifying maintenance.
Implementation Method 1
the nozzle comprising a Coanda surface located adjacent the mouth and over which the mouth is arranged to direct the air flow
Data Source
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AI summary
A fan assembly for creating an air current is described. The fan assembly (100) 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), a mouth (12) through which the airflow is emitted,the mouth (12) being defined by facing surfaces of the nozzle (1), and spacer means (26) for spacing apart the facing surfaces of the nozzle (1). The nozzle (1) extends substantially orthogonally 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 fan provides an arrangement producing an air current and a flow of cooling air created without requiring a bladed fan. The spacer means provide for a reliable, reproducible nozzle of the fan assembly and performance of the fan assembly.