Adjustable Blower Spray Device for Homogeneous Droplet Transport
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Solution Overview
Problem
Conventional blower spray devices for agriculture and horticulture face issues with noise, high air velocity leading to plant damage, and insufficient adjustability of air flow and spray pressure, resulting in inefficient and non-homogeneous spray patterns.
Innovation Solution
A portable blower spray device with an electrically driven blower, adjustable air flow speed, and a selection of spray nozzles to achieve a precise and homogeneous spray pattern, where the air flow is optimized to transport droplets without forming them, allowing for adjustable air speed and pressure settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high air velocity is used to spray the supplied spray liquid, then the spray liquid can be sprayed effectively, but plant damage occurs and active ingredient is sprayed past the plant
Solution Approach 1:
The patent applies dynamics by making the air velocity adjustable rather than fixed. The blower system allows continuous adjustment of air flow speed, enabling the operator to optimize the balance between spray effectiveness and plant safety. This dynamic adjustment capability resolves the contradiction by allowing high velocity when needed for effective spraying and lower velocity to prevent plant damage.
Solution Approach 2:
The patent changes the parameter of air velocity from a fixed high value to an adjustable parameter. By implementing variable speed control of the blower, the system can adapt the air velocity parameter to different spraying conditions, plant types, and distances, thereby resolving the contradiction between achieving effective spray coverage and preventing plant damage.
2Power
If petrol engines are used to drive the blower, then the device has sufficient power, but the device produces noise and exhaust gases
Solution Approach 1:
The patent replaces the petrol engine mechanical system with an electric motor system. This substitution eliminates the combustion process that generates noise and exhaust gases, while still providing sufficient power to drive the blower. The electric motor drives the impeller directly, maintaining the necessary airflow generation capability without the harmful byproducts of internal combustion.
3Power
If petrol engines are used, then the device has sufficient power, but the air flow velocity is insufficiently adjustable
Solution Approach 1:
The patent implements dynamics by replacing the fixed-speed petrol engine with a variable-speed electric motor system. The electric blower allows continuous adjustment of air flow velocity through electronic speed control, providing superior adaptability compared to petrol engines. This dynamic control enables precise adjustment of spray parameters to match different application requirements while maintaining sufficient power output.
4Productivity
If conventional spray devices are used, then the spray pattern is produced, but the spray pattern is not homogeneous and chemical usage is inefficient
Solution Approach 1:
The patent introduces an intermediary airflow field between the spray liquid source and the target surface. The controlled air stream acts as a mediator that carries the spray droplets in a uniform distribution pattern, improving homogeneity of spray coverage. This intermediary airflow prevents droplet clumping and ensures more even distribution of chemicals across the treatment area, resolving the contradiction between productivity and spray pattern quality.
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 device enables efficient and environmentally friendly spraying with a defined spray pattern, reducing chemical usage and minimizing plant damage by optimizing air speed and droplet size for specific applications, ensuring better coverage and reduced drift.
Implementation Method 1
guide vanes are provided in the tubular blow-out channel in a direction of flow downstream of the blade wheel, which guide vanes are designed and arranged in such a way that turbulence produced by the blade wheel merges into a uniform, swirl-free or approximately swirl-free air flow in the axial direction
Implementation Method 2
a spray nozzle, wherein a liquid supply line opens into the spray nozzle, wherein the spray nozzle is arranged along a longitudinal axis in the blow-out channel so that the swirl-free or almost swirl-free air flow encases the spray mist emerging from the spray nozzle
Data Source
AI summary
A blower spray device is provided having a housing which comprises an electrically driven blower and a spray nozzle, and having a liquid supply line opening into the spray nozzle. The housing has a funnel-shaped intake channel and a tubular blow-out channel, and an electrical valve is provided in the liquid supply line to activate and deactivate the liquid supply to the spray nozzle. An electronic controller having a regulating unit for the electric blower is further provided to adjust the air flow velocity.