Greenhouse hydroponic cyclic irrigation system and nutrient solution PH value control method

A cycle irrigation, PH value technology, applied in the direction of greenhouse cultivation, botany equipment and methods, multiple fluid ratio control, etc., to achieve the effect of improving control accuracy, increasing production efficiency, and reducing root rot

Inactive Publication Date: 2016-01-06
JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In view of the defect that the existing hydroponic system only relies on the pH value of a certain nutrient solution in the water and fertilizer circuit as the basis for controlling the pH of the nutrient s

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  • Greenhouse hydroponic cyclic irrigation system and nutrient solution PH value control method

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[0019] figure 1 The greenhouse hydroponics circulating irrigation system in includes: water supply device, feeding device, fertilizer mixing device, irrigation device, and control device 4 and corresponding pipelines and lines. The water supply device is connected with the fertilizer mixing device through the water supply pipeline; The device and the fertilizer mixing device are connected through the feeding pipeline; the irrigation device is connected with the fertilizer mixing device through the outlet main pipe, and the irrigation device is connected with the water supply device through the fertilizer return pipeline; the control device 3 is respectively connected with the water supply device, the feeding device, and the fertilizer The device and the irrigation device are electrically connected to receive detection information and send control instructions.

[0020] The water supply device includes a reservoir 17, and a water replenishment solenoid valve 18 installed on it. Th...

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Abstract

The invention discloses a greenhouse hydroponic cyclic irrigation system and a nutrient solution PH value control method. The PH value on a water outlet main pipe and the PH value on a backflow pipe are used as reference conditions for controlling the PH of a nutriment solution; according to the crop PH value control requirements, a control device can automatically control the PH value of the nutriment solution according to the relation between a preset PH value and the PH values at the positions of the two devices in a cyclic loop. The problem that in the prior art, the nutriment solution is nonuniform in PH value and inaccurate in PH control is solved. An acid liquor nutriment absorption device and an alkali liquor nutriment absorption device are controlled to automatically absorb acid liquor or alkali liquor from an acid liquor pot or an alkali liquor pot so as to achieve control over the self-circulation PH of the hydroponic nutriment solution, and greenhouse hydroponic nutriment solution self-circulation PH control reasonability and effectiveness are ensured.

Description

technical field [0001] The invention relates to a greenhouse hydroponic circulation irrigation system and a method for controlling the pH value of a nutrient solution, belonging to the technical field of nutrient solution control for hydroponic crops. Background technique [0002] Facility agriculture occupies an increasingly important position in agricultural development due to its relatively controllable environment and high-efficiency yield under the same planting area. Under the background of my country's per capita arable land, facility agriculture has become the core of my country's modern agriculture. Development direction. At present, the planting area of ​​my country's facility agriculture ranks first in the world. Facility agriculture represented by smart greenhouses, plastic greenhouses, and sunshine greenhouses is developing rapidly. Among them, water and fertilizer integration technology is more and more widely used in the process of crop water and fertilizer supp...

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Application Information

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IPC IPC(8): A01C23/04A01G9/24G05D21/02
CPCY02A40/25
Inventor 赵梦龙董燕红姜宽舒金文忻吴丹
Owner JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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