Method for controlling fan system for preventing frost damage of plant and apparatus

A fan system and control device technology, applied in botany equipment and methods, plant protection, gardening, etc., can solve problems such as misoperation, achieve the effects of preventing and frost damage, improving yield and quality, and ensuring stable supply

Inactive Publication Date: 2008-12-17
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to: aim at the defect of the control method that only relies on a critical low temperature, wind speed or temperature experience value as the start-up condition of the plant anti-frost fan system, propose an effective method for avoiding plant anti-frost fan system misoperation and empty operation Control method and device

Method used

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  • Method for controlling fan system for preventing frost damage of plant and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Taking the control of the elevated anti-frost fan system in a tea garden as an example, the specific implementation of the method and device will be described.

[0015] The parameters of the anti-frost fan system used are as follows: the fan rotation diameter is 900mm, the speed is 998r / min, the installation height is 7m, the installation depression angle is 20°, the swing head range is 90°, the swing period is 2min, and the drive motor power is 3KW.

[0016] The control device of the anti-frost fan system mainly includes two temperature sensors 5, 7 and a controller 4, as well as a box, an AC contactor, a leakage protector and the like. exist figure 1 In the fan system device for preventing plant frost damage shown, the fan 1 is connected to the column 3 by rotating the cloud platform 2, and the temperature sensor 5 above the temperature inversion layer 8 is installed at the height where the fan 1 is located, and is far away from the fan 1. Avoid the impact on it afte...

Embodiment 2

[0019] Taking the control of the anti-frost fan system in an apple orchard as an example, the specific implementation of the method and device will continue to be described.

[0020] The parameters of the anti-frost fan system used are as follows: fan rotation diameter 2000mm, speed 730r / min, installation height 10m, installation depression angle 20°, swing head range 180°, swing cycle 4min, drive motor power 15KW.

[0021] The composition of the control device and the setting method of the temperature sensor of the anti-frost fan system are the same as in Embodiment 1, and the specific parameters are as follows:

[0022] Because the height of apple tree can reach 4m, its frost resistance is stronger, and the critical low temperature that frost damage takes place is about-1.5 ℃, therefore, use frost-proof fan system control method and device of the present invention, need to reduce the critical low temperature of apple tree canopy The set value is determined to be -1.5°C, and ...

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Abstract

The invention relates to a fan system control method for preventing plant frost damages and a device thereof, belonging to the monitoring and control fields of agricultural meteorologic disasters. The existing plant anti-frost fan system just depends on one critical low-temperature as the condition of starting up the system; when no thermal inversion occurs, the plant frost damages can be more serious; when the thermal inversion strength is weak, the effect is not obvious. The invention is characterized in that the fan system is automatically started up when the plant canopy temperature is below the critical temperature causing frost damages and the thermal inversion difference above the low earth atmosphere thermal inversion layer is greater than a given threshold value, or the fan system is automatically shutdown. The control device mainly comprises a sensor 5 installed above the low earth thermal inversion layer, a sensor 7 and a controller 4 below the thermal inversion layer. The invention guarantees the running reasonableness and efficiency of the anti-frost fan system, thereby avoiding frost damage aggravation or energy waste due to error operation and null operation.

Description

technical field [0001] The invention belongs to the field of agricultural meteorological disaster monitoring and control. The invention relates to a fan system control method and device for preventing plant frost damage, in particular to controlling the automatic operation of the fan system by combining two factors, the critical temperature for plant frost damage and the temperature inversion difference between the upper and lower layers of the near-earth atmospheric temperature inversion layer. Background technique [0002] Late frost damage in early spring and low temperature freezing damage in winter have brought serious harm to the production of agricultural and forestry plants. The occurrence of frost damage in agricultural and forestry plants has its particularity, and the degree of frost damage depends on the low temperature meteorological conditions and biological frost tolerance. First of all, frost damage often occurs under temperature inversion conditions in earl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/08
CPCA01G13/08
Inventor 胡永光李萍萍王秀红张西良
Owner JIANGSU UNIV
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