Elongated Air Current System with Side and Central Outlets
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Solution Overview
Problem
Existing spray devices for phytosanitary products face issues such as restricted air flow, weight, complexity, and high manufacturing costs due to obstructive air injectors and the need for filters, which limit the effective projection of the products onto plants.
Innovation Solution
A system producing an air current with an elongated cross-section using synergistic air jets from side and central outlets, eliminating the need for internal filters and supply ducts, and featuring a convergent-divergent passage geometry that enhances airflow without obstructing the air flow, resulting in a 20% increase in air flow rate and improved projection range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If compressed air injectors are arranged in the air intake part of each passage, then air flow is accelerated by the Venturi effect, but the injectors partially obstruct the intake portion of the passages which restricts the flow of air through the passages
Solution Approach 1:
The air outlet is divided into two distinct outlets: a first outlet for introducing compressed air and a second outlet for discharging air. This segmentation allows the compressed air injection function and the air discharge function to be separated spatially, eliminating the obstruction problem while maintaining the Venturi effect for air acceleration.
2Speed
If injectors and their compressed air supply ducts are added to accelerate air flow, then air projection capability is improved, but the device becomes heavier
Solution Approach 1:
The compressed air supply duct is merged with the passage structure itself, forming an integrated design where the duct wall and passage wall are substantially confounded. This eliminates the need for separate injector components and external supply ducts, significantly reducing device weight while maintaining air acceleration capability.
3Reliability
If filters are installed upstream of the air intake part to prevent foreign bodies from entering, then the injectors are protected, but the filter can clog and weigh down the device
Solution Approach 1:
The filter component is completely removed from the system. The invention achieves injector protection through the integrated duct design where the duct wall provides structural protection, and the system operates without requiring filtration, thereby eliminating clogging issues and reducing weight.
4Power
If the flow of air projected by the injectors has a section smaller than the cross section of the passages, then the injectors work efficiently, but this limits the flow rate of the air leaving the passages
Solution Approach 1:
The air outlet configuration is made dynamic and adaptable through the dual-outlet design. The first outlet can be optimized for high-velocity jet injection while the second outlet provides a larger discharge area, allowing the system to maintain injector efficiency while increasing overall air flow rate through coordinated operation of both outlets.
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 system achieves a significant increase in air flow rate and projection range of phytosanitary liquids, reducing weight and manufacturing complexity while maintaining efficient air flow without the need for internal filters or supply ducts, making it more effective and cost-efficient.
Implementation Method 1
The passages have a profile, along an axis of a transverse section of the box, which converges then diverges. A compressed air injector is arranged in the air intake part of each passage, coaxially, so that the air leaving the injectors leads to induced air in the passages which is accelerated by the Venturi effect.
Implementation Method 2
the airflows generated by the side outlets run along the wall of the casing, they cause a relatively large flow of air induced outside the casing
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The system (10) has an elongated rigid case (2) for defining longitudinal internal volumes within which the pressurized air circulates among an air supply inlet (E) and outlets e.g. holes or slots. The outlets include side outlets e.g. side openings, located on sides of an axis of cross section of the case, and central outlets located between the side outlets. The side outlets generate air flow to drive induction air flow outer to the case and to moves along outer surface of an external portion and front and rear portions of the case.