How does the greenhouse cool down to 25 degrees? It's raining on cloudy days. Do you want to take a fresh air?

Cooling methods include sunshade, wet curtain fan cooling, fog cooling, natural ven

How does the greenhouse cool down to 25 degrees? It's raining on cloudy days. Do you want to take a fresh air?

Cooling methods include sunshade, wet curtain fan cooling, fog cooling, natural ventilation cooling, air conditioning and other equipment cooling. In case of continuous rainy weather, outdoor work should be carried out in the greenhouse. Long-term rainy weather is likely to make the humidity in the greenhouse too high, leading to diseases such as gray mold. At the same time, outdoor work should be decided according to the weather conditions. For example, outdoor work should be done at noon 12 on cloudy days. If the temperature is high, outdoor work should be done well in advance.

First, how to cool the greenhouse to 25℃

1. Shading and cooling: At present, the common cooling method is mainly to cool down by shading the sun. Generally, some black shading nets are laid on the top of the greenhouse to block the sun.

2. wet curtain fan's cooling: mainly turn on the fan to pump out the air in the greenhouse, so that the air pressure in the greenhouse becomes negative pressure, and then pump the water to the wall of the wet curtain with a water pump. After the outside air is sucked into the greenhouse, it will exchange water vapor through the wet curtain, convert heat and humidity, and then evaporate water, thus achieving the effect of cooling down.

3. Fog cooling: similar to the cooling in wet curtain fan, the water is atomized first, then the atomized water absorbs the temperature in the air in the greenhouse, and then the wet air is discharged out of the greenhouse with the wind machine to achieve the cooling effect.

4. Natural ventilation and cooling: mainly open the door curtains at both ends of the greenhouse to keep ventilation, so as to discharge heat and moisture, promote air circulation and achieve cooling effect.

5, air conditioning and other equipment to cool down: this way of cooling down costs more, and less farmers use this way to cool down.

Second, should the greenhouse be ventilated in rainy weather?

In case of continuous rainy weather, outdoor work is needed. Long-term rainy weather can easily lead to excessive humidity in the greenhouse. When the humidity in the greenhouse is about 70%-80%, diseases such as gray mold are easy to occur, so outdoor work is needed, but there are also some skills in outdoor work.

Third, how to let the wind out of the greenhouse?

1. Air release should be based on weather conditions. For example, in cloudy days, deflation is generally carried out around noon 12, deflation should be controlled at 7 cm, and deflation time should be controlled at 15 minutes. Note: Turn off the deflation after 15 minutes, wait for half an hour, and then deflate at intervals after 15 minutes.

2. If the weather is fine, the temperature is high, and the temperature in the shed is also high, outdoor work should be done well in advance, and the width of the outdoor air outlet should be gradually increased during outdoor work to gradually reduce the temperature in the shed.

3. If the air outlet is blocked by the insect-proof net, the width of the air outlet should be appropriately increased during deflation to avoid being blocked by the insect-proof net.