Plant Cultivation Nutrient Liquid pH and Sterilization Control
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Solution Overview
Problem
Existing plant cultivation apparatuses face challenges in effectively managing the pH of nutrient liquids, removing impurities and bacteria, which can adversely affect plant growth.
Innovation Solution
The apparatus incorporates an electrolysis module to generate hypochlorous acid for pH adjustment and an activated carbon module for impurity removal, along with sensors and controllers to manage nutrient liquid quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultraviolet sterilization is used for nutrient liquid, then bacteria are removed, but the sterilization effect varies depending on turbidity and contamination amount
Solution Approach 1:
The patent changes the sterilization method from ultraviolet radiation to electrolysis, fundamentally altering the physical-chemical parameters of the treatment process. Electrolysis generates hypochlorous acid through electrochemical reactions, which provides consistent sterilization effectiveness regardless of nutrient liquid turbidity or contamination levels, thereby resolving the reliability issue.
Solution Approach 2:
The patent replaces the mechanical/optical ultraviolet sterilization system with an electrochemical electrolysis system. This substitution eliminates the limitations of UV penetration through turbid liquids, as electrolysis directly generates disinfecting agents in the liquid medium itself, making the sterilization effect independent of liquid clarity.
2Productivity
If nutrient liquid is stored and reused, then resource efficiency improves, but pH changes and foreign substances are produced
Solution Approach 1:
The patent implements a feedback control system with pH sensors that continuously monitor nutrient liquid quality. When pH deviation or contamination is detected, the system automatically activates the electrolysis module to regenerate the nutrient liquid, creating a closed-loop control mechanism that maintains quality standards during repeated use.
Solution Approach 2:
The electrolysis module enables the nutrient liquid to self-purify and self-regulate its pH through in-situ electrochemical treatment. The system eliminates the need for external intervention or complete replacement of nutrient liquid, allowing it to maintain quality autonomously during extended storage and reuse periods.
3Reliability
If pH of nutrient liquid is not properly managed, then plant growth is adversely affected, but additional management systems increase complexity
Solution Approach 1:
The electrolysis module serves multiple functions simultaneously: it sterilizes the nutrient liquid, regulates pH levels, and eliminates odors. This multi-functionality consolidates what would otherwise require separate systems into a single integrated component, achieving reliable plant growth conditions without proportionally increasing system complexity.
Solution Approach 2:
The pH management system operates autonomously through automatic sensing and electrolytic adjustment. The system self-regulates without requiring manual intervention or complex external control mechanisms, maintaining optimal pH levels while minimizing added complexity through automated self-service operation.
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
Ensures the supply of high-quality nutrient liquid by effectively managing pH and removing harmful bacteria and impurities, thereby promoting healthy plant growth.
Implementation Method 1
an electrolysis module to generate hypochlorous acid for pH adjustment
Implementation Method 2
an activated carbon module for impurity removal
Data Source
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AI summary
A plant cultivation apparatus and a method for controlling the same are disclosed. The apparatus includes a cabinet; a cultivator disposed in the cabinet, wherein at least a portion of a plant is received in the cultivator; a nutrient liquid supply including: storage for storing therein nutrient liquid to be supplied to the cultivator; and a supply part connected to the storage part for supplying the nutrient liquid from the storage part to the cultivator; and a nutrient liquid manager including a first manager configured to increase a pH of the nutrient liquid and a second manager configured to decrease the pH of the nutrient liquid, wherein the nutrient liquid manager is configured such that the nutrient liquid supplied from the storage part flows through one of the first manager and the second manager and then is re-supplied to the storage part.