Nozzle for a fan assembly
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Solution Overview
Problem
Conventional fan assemblies that do not use caged blades struggle to efficiently direct airflow without tilting, leading to limitations in airflow control and efficiency.
Innovation Solution
A nozzle design with multiple air outlets and a valve system that adjusts the size of each outlet to change the airflow direction without tilting, ensuring constant total airflow and optimizing airflow velocity by colliding lateral airflows with primary airflows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single air outlet is used in conventional fan assemblies, then the structure is simple, but the airflow direction control is limited and cannot be adjusted without tilting
Solution Approach 1:
The single air outlet is divided into multiple air outlets (first air outlet and second air outlet). Each outlet can be independently controlled by separate valve members, enabling the airflow direction to be adjusted by varying the opening sizes of different outlets without tilting the entire nozzle assembly.
Solution Approach 2:
The nozzle incorporates movable valve members that can dynamically adjust the opening size of each air outlet. This dynamic control mechanism allows real-time modification of airflow distribution among multiple outlets, providing flexible direction control while maintaining a fixed nozzle position.
2Use of energy by moving object
If the total outlet area is kept constant when adjusting airflow distribution, then the system load remains constant, but the control mechanism becomes more complex
Solution Approach 1:
The control system adjusts the opening parameters (area) of individual air outlets while maintaining the sum of all outlet areas constant. This parameter coordination ensures that the total airflow capacity remains stable, keeping the system load constant, while still allowing redistribution of airflow among different outlets for direction control.
Solution Approach 2:
The valve system serves multiple functions simultaneously: it controls the opening size of each air outlet independently, maintains constant total outlet area, and thereby stabilizes system load. This multi-functionality is achieved through coordinated movement of valve members that adjust individual outlets while preserving the overall area constraint.
3Measurement precision
If multiple air outlets are used to control airflow direction, then the airflow direction control precision is improved, but the noise from multiple outlets may increase
Solution Approach 1:
By adjusting the opening parameters of multiple air outlets in a coordinated manner, the system achieves precise airflow direction control. The parameter optimization ensures that airflow is distributed efficiently among outlets, minimizing turbulence and noise generation while maintaining accurate direction control.
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
Enables precise control of airflow direction and increased velocity, improving energy efficiency and reducing noise while maintaining constant system load.
Implementation Method 1
the first and second air outlets being oriented in convergent directions... optimizing airflow velocity by colliding lateral airflows with primary airflows
Data Source
AI summary
A nozzle for a fan assembly includes an air inlet, a first air outlet and a second air outlet that are oriented in convergent directions, and a valve for controlling the first and second air outlets. The valve includes one or more valve members that are moveable to simultaneously adjust the size of the first air outlet and inversely adjust the size of the second air outlet. The nozzle further includes a third air outlet and a fourth air outlet, the third air outlet being opposite the fourth air outlet, the third and fourth air outlets being oriented in convergent directions.