Hydroponic Pot Injector with Venturi Air Inlet
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Recirculating Deep Water Culture (RDWC) hydroponic systems using negative pressure often result in uneven nutrient distribution, causing some plant sites to receive a concentrated dose of nutrients, which can shock the plants, and existing solutions like drip feeding are not practical.
Innovation Solution
Employing a pot design that uses positive pressure to recirculate nutrient solution, featuring an injector with a venturi and air inlet to create a whirlpool effect, ensuring even oxygenation and distribution of nutrients to all plant sites, while preventing debris entry and noise from air concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If negative pressure is used to recirculate nutrient solution, then the system can operate with simple pressure dynamics, but nutrient distribution becomes uneven causing plant shock
Solution Approach 1:
The patent inverts the conventional negative pressure approach by using positive pressure to drive nutrient solution through the system. The pump delivers pressurized solution through distribution lines to multiple plant sites, ensuring uniform delivery. This reversal of pressure dynamics resolves the contradiction by achieving both operational simplicity and distribution uniformity simultaneously.
Solution Approach 2:
The patent changes the pressure parameter from negative to positive throughout the system. By maintaining positive pressure in the distribution lines and using pressure-regulated emitters, the system achieves consistent nutrient delivery to all plant sites. This parameter change eliminates the uneven distribution problem while keeping the system operationally simple.
2Ease of manufacture
If nutrients are added to the header in a negative pressure system, then nutrient dosing is simplified, but the first pot receives a concentrated dose that shocks the plant
Solution Approach 1:
The patent uses positive pressure to pre-mix nutrients uniformly throughout the distribution system before delivery to plants. The pressurized system ensures nutrients are distributed evenly across all plant sites from the moment of injection, preventing concentrated doses. This preliminary uniform distribution action eliminates plant shock while maintaining dosing simplicity.
Solution Approach 2:
The patent replaces the gravity-driven negative pressure mechanical system with a pressurized positive pressure system. This substitution enables precise control over nutrient distribution timing and uniformity, ensuring nutrients reach all plants simultaneously at appropriate concentrations, thereby preventing plant shock.
3Quantity of substance
If air is introduced through venturi to increase oxygenation, then oxygen content in nutrient solution increases, but noise from air concentration becomes problematic
Solution Approach 1:
The patent introduces silencers as intermediary components in the air intake lines of the venturi systems. These silencers attenuate the noise generated by air being drawn into the nutrient solution while allowing the oxygenation function to continue. This intermediary element resolves the contradiction by filtering out the harmful noise while preserving the beneficial oxygenation.
Solution Approach 2:
The patent acknowledges the noise generated by venturi air intake as an inevitable byproduct of oxygenation and converts this harmful effect into a manageable characteristic through proper component selection. By using silenced venturi systems, the design accepts the noise as part of the oxygenation process while mitigating it to acceptable levels, allowing the beneficial oxygenation to proceed.
4Quantity of substance
If pot capacity is increased to improve fluid volume for oxygenation, then oxygen saturation potential increases, but whirlpool effect and root collection efficiency may be compromised
Solution Approach 1:
The patent optimizes the pot capacity parameter to a specific range (55-60 liters) that balances oxygen saturation potential with whirlpool effect efficiency. This precise parameter selection ensures that the fluid volume is sufficient for adequate oxygenation while maintaining the dimensional characteristics needed for effective whirlpool formation and root collection in the center of the pot.
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 positive pressure system ensures uniform nutrient distribution, increases oxygen content, prevents root blockages, and maintains optimal fluid temperature, enhancing plant growth and health by creating a consistent whirlpool effect and high oxygen saturation throughout the solution.
Implementation Method 1
the injector comprising a venturi and an air inlet... oxygen content in the fluid is increased by drawing air into the fluid through the venturi
Implementation Method 2
fluid injected into pot through the injector is caused to rotate in the pot under pressure of the fluid to provide a whirlpool effect
Data Source
AI summary
A pot (1) for use in growing plants comprises a base (2), an annular wall (3) extending from the base (2) to a rim (4), a drain (5) being defined substantially in the centre of the base (2), an injector (6) in the wall (3) for injecting fluid into the pot (1), wherein the injector (6) is located in the wall (3) proximate to the base (2) and distant to the rim (4) and aligned with a plane tangential to the wall (3), the injector (6) comprising a venturi and an air inlet. The pot (1) forms part of a recirculating deep water culture (RDWC) hydroponic system.