Soilless culture system with water level controller

Abstract

The invention discloses a soilless culture system with a water level controller. The soilless culture system comprises a liquid supply pool, a water pumping machine, a culture container and the water level controller, wherein the water level controller is used for controlling a power supply of the water pumping machine, the water pumping machine pumps nutrition solution in the liquid supply pool into the culture container, the culture container is provided with a liquid outlet used for flowing back nutrition solution in the culture container back into the liquid supply pool, the water level controller comprises a power supply circuit and a control circuit connected with the power supply circuit, the power supply circuit comprises a transformer and a rectifying circuit, the transformer is connected with a power supply, the rectifying circuit is connected with a secondary winding of the transformer, the control circuit comprises a relay, an NE555 chip, a high-water-level detection line, a middle-water-level detection line and a low-water-level detection line, the relay is used for controlling the power supply of the water pumping machine, the NE555 chip is used for controlling the relay, the high-water-level detection line, the middle-water-level detection line and the low-water-level detection line are arranged in the culture container and are connected with the NE555 chip, the output end of the rectifying circuit is respectively connected with the water-level detection lines, the output end of the rectifying circuit is also connected with a fourth pin and an eighth pin of the NE555 chip, a first pin of the NE555chip is grounded, a third pin of the NE555 chip is connected with a light emitting diode and is grounded, and the relay is connected with a primary winding side of the transformer.

Description

technical field [0001] The invention relates to a soilless cultivation system, in particular to a soilless cultivation system with a water level controller. Background technique [0002] With the development of modern facility agriculture, the planting method of soilless cultivation is more and more widely used. In modern facility agriculture, especially in the soilless cultivation of horticultural crops, more and more automatic water supply irrigation techniques are used in soilless cultivation techniques. [0003] Water towers or high-level water tanks that supply water for industrial and agricultural production and residents' lives basically realize automatic water supply through automatic water level control devices. One of the currently used water level controllers is a float type. The float type water level controller mainly controls the water level by the float as the water level rises and falls. Its main disadvantage is that nylon ropes, pulleys, and limit gears ar...

AI Technical Summary

Problems solved by technology

The float type water level controller mainly controls the water level by the float ball following the rise and fall of the water level. Its main disadvantage is that nylon ropes, pulleys, and limit gears are easy to freeze under low temperature conditions, causing the water level controller to fail.

In addition, in hot weather, water vapor erodes the travel switch installed on the water surface in the water tank, causing a short circuit of the travel switch and causing the water level control device to lose control

Insufficient water level controller makes the soilless cultivation system unable to irrigate normally, which affects the growth of crops

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