What is the principle of greenhouse

The principle of greenhouse is to lock the sun heat, improve the temperature in the greenhouse, to meet the growth of crops.

Sunlight will shine into the greenhouse through the film and glass of the greenhouse during the day, absorbing the heat of solar radiation to increase the temperature inside the greenhouse. After the temperature rises, the long-wave radiation heat reflected from the ground cannot be dissipated through the greenhouse, thus reducing the heat loss to achieve the purpose of warming, thus creating a suitable growth environment for crops that are not suitable for the current season and increasing the yield of crops.

Different crops have different growth environments for temperature. In the past, they could only rely on the weather for food. However, with the emergence of greenhouses, crops can also grow and mature naturally in cold weather, so that we can eat a variety of fruits and vegetables all year round, enriching the public's dining table. For farmers, off-season fruits and vegetables are profitable, which makes greenhouses widely used.

In time, the temperature changes with the change of the sun rising in the east and setting in the west. In space, the temperature will also decrease or increase with the difference of altitude and longitude and latitude. The different changes of these temperatures have different effects on the growth and development of crops. The greenhouse contains light-transmitting materials covering the skeleton and internal environment control equipment, which can form a unique microclimate in the greenhouse, to create different crops required temperature, humidity and other growth conditions, to achieve efficient, high-quality production function.

The greenhouse can adopt natural ventilation. The hot pressure generated by the external wind pressure and the temperature difference in the greenhouse promotes the air flow in the greenhouse. The heated volume of the air increases and the mass decreases, showing a rising flow. After reaching the top, it spreads around. After being cooled, the density increases and returns to the ground. The cycle starts again and again to achieve the purpose of greenhouse air flow.