greenhouse function

The greenhouse adopts the principle of heat absorption and heat preservation. On the one hand, the material of the greenhouse can absorb light and heat, and on the other hand, the material also has the function of maintaining temperature and preventing heat loss. This kind of transparent covering material can not only effectively block and reflect most of the radiation, but also accumulate more heat through the soil and walls, so as to achieve the purpose of maintaining temperature.

1. Detailed description of the principle of greenhouse
 

· For solar radiation, plastic greenhouses and glass are almost "transparent", and most of the solar radiation can enter. But for ground long-wave radiation, plastic greenhouses and glass are not "transparent", and long-wave radiation rarely penetrates. In this way, greenhouses and greenhouses allow the external solar energy to continuously enter the room, while the indoor heat is rarely lost, thereby regulating the temperature.
· Therefore, sunlight shines through the film into the greenhouse, and the temperature is firmly locked by the film, so the temperature is relatively high. The ground itself also has temperature. Due to the barrier of the film, the outside cold air cannot enter. It cannot contact the indoor air so that its temperature will not drop. The function of the film is to only enter the sun and not enter the air, so the indoor temperature is more The outdoor temperature is much higher.

2. What kinds of greenhouses are there?
1. Glass greenhouse
Its covering material is mostly transparent glass. Its light transmittance is very good, even up to 70%. The frame is generally composed of galvanized steel pipe or aluminum alloy light steel, which has a high cost and is being installed. The maintenance is very inconvenient, and the economic benefits cannot be effectively guaranteed.

2. Plastic shed greenhouse
It is widely used in southern my country, mainly used in gardening facilities. Plastic greenhouses are covered with plastic film. Most of them use cement and steel mixed columns as the skeleton. It is a single-span arch without heating. Roof greenhouse, its main function is to keep warm in winter and shading in summer.
3. Plastic solar greenhouse
This is a kind of traditional greenhouse in northern my country. It has developed rapidly in recent years. It is lighter in weight, less use of skeleton materials, long service life, better production efficiency, and its ability to control the environment is very huge. All over the world, this type of greenhouse is easily accepted, and it has almost become the mainstream of today's development.

4. Movable roof greenhouse
This type of greenhouse is more commonly used in areas with mild climate and no snow. It has a set of automatic control screen pull system, which will carry out reasonable control according to the outdoor situation, which can fully reduce the energy cost to a certain extent. It can also improve efficiency.

3. Smart greenhouse
(1) Working principle
The greenhouse intelligent control management system is based on the data information collected by sensors such as the temperature and humidity inside the greenhouse and the temperature and moisture of the soil. It uses wireless or wired transmission to transmit the information to the converter, connect it to the upper computer, and the personnel conduct research and alarm. The monitor is then used to control fans, wet curtains and other equipment to perform operations such as cooling and humidification according to relevant instructions to ensure the growth and development environment of crops in the greenhouse.

(2) Operation function
The intelligent greenhouse can realize intelligent unmanned automatic operation, automatically control the greenhouse environment, and ensure the growth of economic crops. The data collected by the computer can be accurately displayed and counted. There are manual switches and automatic switches in the control center, which can be switched automatically, and manual control operations can be carried out when necessary.