Ventilation systems

Ventilation systems play an important role in greenhouses, helping to create the climate and growing conditions for each plant. As such, they are key to achieving plant health and excellent crop production in the long term. Regular ventilation. As we've said before, greenhouses are so more humid mainly due to their sealing, so proper ventilation is a good way to reduce humidity. However, it is not always possible to ventilate, it must be done when the outdoor temperature is relatively high, otherwise it will cause the indoor temperature to drop. If the temperature drops too quickly when ventilating, the vent should be closed in time to prevent the sudden drop in temperature from harming the crop.

External Shading

External shading system it is mainly to shield the greenhouse outside the excess sunlight, to form a shade to protect the greenhouse vegetables, flowers. It keeps the temperature inside the greenhouse at the right temperature, which can effectively block the direct sunlight from hitting the crops and does not affect the natural ventilation of the greenhouse. The cooling effect is better than internal shading, but the external shading material is required to be strong, durable, less flexible and resistant to aging.

Internal Shading

Internal sunshade is to re-shade the sunlight entering the greenhouse, reflecting part of the sunlight out of the outdoor, and the other part is absorbed by the internal sunshade and increase the indoor temperature. If you compare the effect of using external or internal shading alone, external shading is far better than internal shading, most of the greenhouse facilities in the south use external shading mostly, but the effect of using internal and external shading is more desirable, when the sunshine is strong open the shading net, and when it meets cloudy days with insufficient light, then close the shading net.

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Side Ventilation

Every standard greenhouse should have a side ventilation system for effective climate management at all times.

Exhaust fans

Exhaust fans provide much-needed fresh air to greenhouses that require forced ventilation, as well as dehumidifying the environment. The centrifugal shaft design automatically opens and closes the fan cover as needed.

Wet curtains

Wet curtain cooling is a process whereby hot outside air passes through a wet curtain, is humidified and cooled to form cooler air, which passes through a controlled chamber to absorb the residual heat and then exits to the outside. It is mainly cooled by the evaporation of water, because the evaporation of water needs to absorb heat, so that it can take away some of the heat in the shed, and at the same time start the fan to extract heat greenhouse air to be cooled.

Rational watering

Moisture is the main factor leading to increased indoor humidity, so how to watering becomes an important measure to control humidity. Winter and spring production can choose a sunny day ditch watering or split watering, ground cover can be used under the membrane dark irrigation. Watering should strictly control the amount of watering to prevent excessive indoor humidity. Appropriate wind release after each watering, timely hoeing and loosening, can reduce soil humidity, can also reduce air humidity.