Oscillating Blower Nozzle Using Fixed Passages for Sweeping
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Solution Overview
Problem
Existing debris blowers require continuous operator motion to achieve effective sweeping, which can be tiring and inefficient, especially for larger areas, and existing solutions with movable parts are complex and costly.
Innovation Solution
A nozzle design that attaches to the blower tube, comprising mating halves forming an air inlet and outlet, produces an oscillating airstream through fixed passageways, eliminating the need for manual manipulation and movable parts by using airflow dynamics to create a side-to-side sweeping action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a nozzle with multiple moving parts is used to mechanically direct the air stream side-to-side, then the sweeping motion is effective, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces the mechanical system of moving parts with a fixed-geometry nozzle design that generates oscillating airflow through carefully designed internal passages. The airflow itself performs the sweeping motion function without requiring mechanical actuators, motors, or moving components, thus eliminating device complexity while maintaining operational effectiveness.
Solution Approach 2:
The nozzle design allows the airflow to automatically oscillate side-to-side through its own dynamics as it passes through the fixed internal passages. The system uses the kinetic energy and flow characteristics of the air stream itself to create the sweeping motion, without requiring external control mechanisms or additional energy input beyond what is already provided by the blower.
2Productivity
If continuous operator motion is required to sweep debris over large areas, then the blower can be simple and lightweight, but operator fatigue increases and productivity decreases
Solution Approach 1:
The patent introduces dynamic oscillating airflow from a static nozzle, creating a self-moving air stream that automatically sweeps debris across surfaces. This dynamic airflow pattern eliminates the need for operator motion while maintaining effective sweeping coverage, thereby increasing productivity without increasing operator fatigue.
3Ease of manufacture
If a fixed nozzle design is used, then the manufacturing cost is reduced, but the ability to provide sweeping motion without operator manipulation is lost
Solution Approach 1:
The patent achieves automatic sweeping capability through a simple fixed nozzle design that uses fluid dynamics principles. The internal passage geometry is designed to create oscillating airflow patterns that automatically generate sweeping motion, eliminating the need for complex mechanical systems while maintaining manufacturability and low cost.
Solution Approach 2:
The invention uses pneumatic principles by designing the nozzle internal passages to manipulate air flow characteristics. The fixed geometry creates pressure differentials and flow separation that result in automatic oscillating airflow, providing automated sweeping function through fluid mechanics rather than mechanical means.
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 efficient sweeping without operator effort, reducing fatigue and operational complexity, while maintaining effectiveness over larger areas with a cost-effective design.
Implementation Method 1
The nozzle is adapted to produce an airstream at the air outlet that oscillates back-and-forth along an axis of the air outlet, wherein movement of the air through fixed passageways of the nozzle alone produces the oscillating airstream
Data Source
AI summary
A debris blower incorporating a nozzle (e.g., removably attachable nozzle) formed from first and second mating halves, wherein the nozzle provides an airstream that oscillates as a result of dynamic fluid effects of airflow passing through the nozzle. As a result, an oscillating airstream may be produced without the use of complicated moving airflow control elements such as louvers and vanes, and without requiring manual manipulation of the blower by the operator.