The greenhouse control system actuators include

The greenhouse control system actuators include fans, air pumps, water curtains, shade curtains, solenoid valves and other equipment for regulating greenhouse parameters.

Greenhouse control is a complex control system with multiple inputs and outputs. The following three aspects describe its processing.

(1) Different seasons, different regulation measures. In spring and autumn, parameters such as temperature and humidity can be regulated by fans, water curtains and shade curtains.

In winter, the temperature and humidity parameters can be regulated by means of heating and water shades, but not by fans and side windows.

Therefore, the control is divided into two modes: winter and other seasons. In winter the regulation measures are: heating solenoid valve, air pump, water pump, water curtain and fill light; in other seasons the regulation measures are: fan, shade curtain, water curtain, air pump, water pump and fill light.

(2) Different growth periods, different parameter requirements and different control modes. In the case of courgette, for example, the entire growth process is divided into: germination, seedling, flowering and fruiting periods. Therefore, the control is subdivided into 4 growth periods and 3 periods of the day, the first half of the night and the second half of the day. Different regulation measures are used in the different periods.

(3) Different parameters and different relationships between the regulating measures. Fans cannot be turned on when there is little change in supplemental CO2 and temperature and humidity. In case of insufficient light, the shade curtains cannot be drawn. Therefore, the control mode is shielded. In the case of CO2 supplementation, the fan is shielded; in the case of insufficient light, the shade curtain is shielded.