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Greenhouse gathering ozone intelligent disinfection method adopting PID control and disinfection device

A technology of control method and disinfection method, which is applied in the field of agricultural engineering, can solve the problems of highly unstable ozone, inability to exert the best efficiency of ozone, and hindering the application potential

Active Publication Date: 2016-12-07
BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, facing the complex and changeable environment for facility agriculture, the highly unstable characteristics of ozone hinder its application potential. Especially in facility agriculture, greenhouse space disinfection and pest control, trace ozone generators, smart ozone The generating device cannot exert the best efficiency of ozone under the environmental conditions of high temperature and high humidity

Method used

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  • Greenhouse gathering ozone intelligent disinfection method adopting PID control and disinfection device
  • Greenhouse gathering ozone intelligent disinfection method adopting PID control and disinfection device
  • Greenhouse gathering ozone intelligent disinfection method adopting PID control and disinfection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Select a solar greenhouse with a length of 50m, a span of 7m, and a ridge height of 3.7m; use the following methods for ozone disinfection:

[0051] (1) Set the lower limit value C of the ozone concentration in the greenhouse environment to be disinfected 下 6.94mg / m 3 ;

[0052] (2) at 0.26 mg·m -3 min -1 The speed of passing ozone into the greenhouse environment to be disinfected;

[0053] (3) From the time when the ozone is introduced, take 5min as an interval to collect environmental parameters, i.e. the actual ozone concentration C 0 ;

[0054] (4) compare the numerical value of described actual ozone concentration and suitable ozone concentration, adopt the feed of PID control method to control ozone, be specifically:

[0055] When the C 0 >C 下 , stop feeding ozone;

[0056] When the C 0 下 When, continue to pass into ozone after t minutes, stop passing into ozone; Said t is by formula: C=343×t 0.0166 -345.6 is calculated, where C is C 下 with C 0 The di...

Embodiment 2

[0061] Compared with Example 1, the difference is only in:

[0062] In step (1), the optimal ozone concentration C is set 1 is the suitable ozone concentration;

[0063] In step (3), the environmental parameters temperature T and humidity RH are collected in real time, and the formula C 2 =-0.059T-0.047RH+15.701 Calculate the actual ozone concentration C 2 .

Embodiment 3

[0065] A kind of greenhouse ozone disinfection device with PID control function (as figure 2 shown), including a sealed box, the inside of the sealed box includes an external source gas supply system, an ozone generation system, a sensing data acquisition module and an ozone disinfection PID control module;

[0066] The box is heat-insulated, moisture-proof and movable, and its surface is provided with switches and / or touch screens for controlling the systems and modules;

[0067] The external source gas supply system includes a gas source 1, a water vapor separator 2, a drying tower 3, and a flow meter 4 connected in sequence;

[0068] An ozone discharge chamber 5 is arranged in the ozone generating system, and the inlet of the ozone discharge chamber is connected to the outlet of the flowmeter; the ozone generated in the ozone discharge chamber passes through the Φ2.5mm ozone vent holes evenly arranged every 1.0m. Plastic hose for transmission;

[0069] The ozone generati...

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Abstract

The invention relates to a greenhouse gathering ozone intelligent disinfection method adopting PID control. The greenhouse gathering ozone intelligent disinfection method comprises the following steps: setting the optimal ozone concentration in a to-be-disinfected greenhouse environment; introducing ozone to the to-be-disinfected greenhouse environment; acquiring actual ozone concentration; and comparing the actual ozone concentration and the optimal ozone concentration, and controlling the introduction of ozone by adopting a PID control method. The invention further provides a greenhouse ozone disinfection device with a PID control function. With the adoption of the method and the device provided by the invention, the injuries caused to crop plants due to too high ozone concentration can be avoided, meanwhile, the problem that no effects are achieved for pests and diseases due to too small ozone concentration is also solved, the method and the device are safe and efficient and are low in cost, the ozone disinfection realizing the integrated gathering management and control is achieved, and thus the method and the device have an extremely strong promotion value.

Description

technical field [0001] The invention relates to the technical field of agricultural engineering, in particular to an ozone disinfection method for production and a greenhouse ozone disinfection device with a PID control function. Background technique [0002] Facility agriculture, as a closed or semi-closed planting environment, realizes a new agricultural production method that gets rid of the dependence on the traditional natural environment through the use of modern agricultural engineering technology, mechanical technology and information equipment technology, and through temperature, humidity, light, CO 2 Environmental factors such as concentration and nutrient solution content, as well as intelligent regulation of each link of crop growth and development, create optimal production conditions for crops. While the current facility agriculture is developing rapidly, it is also facing a series of technical bottlenecks and challenges. In the production of facility agricult...

Claims

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Application Information

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IPC IPC(8): A61L2/20A61L2/24A61L9/015A61L101/10
Inventor 余礼根郭文忠李友丽赵倩卫如雪
Owner BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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