Dual-Tube Nozzle Pipe With Helical Fins for Broader Airflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional blower apparatuses have limited airflow profile control, resulting in a narrow air jet output, and increasing nozzle diameter to achieve broader airflow makes the apparatus bulky and aesthetically unappealing.
Innovation Solution
A nozzle pipe with radially and longitudinally extending rectifier fins, inclined at an angle, is coupled to the blower apparatus, which deflects airflow helically, allowing for controlled breadth and speed adjustment of the air jet output without increasing the apparatus's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a larger size nozzle tube is attached to increase airflow breadth, then the air jet output breadth is improved, but the apparatus becomes bulky and aesthetically unappealing
Solution Approach 1:
The patent changes the flow parameters of air by introducing rectifier fins that create helical flow patterns. This transforms the airflow from a simple cylindrical jet into a whirling flow that spreads broader without requiring a larger nozzle diameter, thus maintaining compact apparatus size while improving airflow breadth
Solution Approach 2:
The rectifier fins are configured with curved surfaces that guide airflow in helical paths. This curvature transforms the linear airflow into a rotational pattern, enabling the air jet to spread broader in a controlled manner without increasing the physical dimensions of the nozzle
2Shape
If the nozzle outlet diameter is increased to produce broader air jet, then the airflow profile is improved, but the device complexity increases
Solution Approach 1:
The nozzle internal structure is segmented into multiple rectifier fins that are spaced circumferentially. These fins divide the airflow into multiple streamlines, each following a helical path, which collectively creates a broader and more uniform airflow profile without requiring complex external structures
Solution Approach 2:
The patent introduces a rotational dimension to the airflow by using inclined rectifier fins. Instead of simply expanding the outlet diameter in one dimension, the fins create helical motion that adds a rotational component, effectively utilizing three-dimensional flow control to achieve broader dispersion from the same outlet size
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 nozzle pipe effectively broadens the airflow profile while maintaining a compact design, allowing for adjustable wind speed and breadth by varying the orientation of the rectifier fins, eliminating the need for multiple nozzle sizes.
Implementation Method 1
the peripheral portion of the cylindrical airflow in the nozzle pipe is oriented aslant to whirl helically
Data Source
AI summary
A nozzle pipe is to be coupled to a distal open end of an air blow-off tube of a blower apparatus for regulating the profile of an airflow blown out from the blow-off tube. The nozzle pipe comprises an outer tubular member and an inner tubular member coaxially disposed within the outer tubular member. The inner tubular member has a circumferential wall formed with apertures allowing air passage therethrough. The outer tubular member and the inner tubular member provides a first space therebetween to form a first air passage, while the inner tubular member provides a second space therein to form a second air passage. A plurality of rectifier fins are disposed inward from the outer tubular member, standing radially and extending longitudinally, and spaced apart circumferentially from each other. The fins extend inclined at an angle with reference to the longitudinal central axis of the tubular members.