Greenhouse greenhouse warming, insulation, cooling common methods are?

The planting environment temperature is the first factor that directly affects the growth of crops, in the hot summer, midday direct sunlight, the outdoor temperature is generally more than 30 degrees. If the crop is in this high temperature environment for a long time, it will lead to plant cell damage, affecting its growth or directly lead to the death of the crop. In winter, when the wind is cold, the temperature inside the shed will drop drastically, and the cold temperature will cause the plants to grow slowly or freeze to death. Therefore, in the hot weather, we need to cool down the greenhouse; in the cold weather, we need to warm up the greenhouse; only to make the greenhouse temperature to achieve the appropriate environment for the growth of crops, in order to ensure the normal production of crops.

A common means of cooling are the following:

1, ventilation cooling:

Greenhouse in the construction of the time will consider the design of the window, in the hot summer, in the outdoor temperature is not particularly high, you can open the window to ventilate properly. Ventilation of the greenhouse is a common means of cooling the greenhouse, in the case of the outside temperature is not high is more applicable, but the outdoor temperature is too high, ventilation can only let the outside hot temperatures into the greenhouse interior, and can not play an effective cooling purpose.

2, greenhouse peripheral shading cooling method:

Peripheral shading method is through the use of opaque objects or semi-transparent objects in the hot summer sunshine covered in the greenhouse outside of a method, which can reduce sunlight on the greenhouse irradiation, a large area of shading can be effective in reducing the temperature of the greenhouse, and with different shading materials to meet the different degrees of shading effect. External shading means simple and easy to operate, is the main means of summer cooling. But the use of external shading method should pay attention to one thing is to prevent the shading material and film contact place due to high temperature and lead to film aging degree accelerated.

3, wet curtain cooling method:

Wet curtain cooling is a very effective means of cooling. It is through the conveyor system will be transported to the greenhouse water on each wet curtain, and then through the blower will be blown into the air water mist, the use of water evaporation and heat absorption principle to reduce the temperature of the air environment. Wet curtain cooling can not only have a very good cooling effect, and can effectively clean the air in the greenhouse, but also some water droplets can be sprayed to the surface of the leaves, so the wet curtain cooling is also a very good means of summer cooling.

4, spray (sprinkling) cooling:

In the greenhouse greenhouse using spray cooling equipment for spraying or sprinkling, spray cooling equipment using the principle of evaporation cooling, through the production of ultra-fine particles of water spray, absorb the heat energy in the surrounding area, evaporate in time to reduce the surrounding temperature. The use of spray cooling equipment is effective, not only cooling effect is good, and the use of small cost, energy saving and environmental protection, in line with the interests of the majority of greenhouse planting.

5, intelligent air conditioning (fan) cooling method:

Intelligent fan, air-conditioning cooling method of cost relative to the remaining two methods to be higher. In Xinxin IOT's temperature and humidity monitoring system, the user can set the upper and lower limit values of the system's temperature according to the system's historical data, when the sensor detects that the temperature is higher than the upper limit value, the system automatically controls the air conditioner (fan) to turn on and cool down the greenhouse; when the sensor detects that the indoor temperature is lower than the lower limit value, the system controls the air conditioner (fan) to turn off, in short, it will always make the temperature in the greenhouse to keep the temperature in this range. This method is increasingly used in modern intelligent temperature and humidity monitoring system.

Two, common means of insulation are the following:

1, in the greenhouse periphery with insulation materials;

2, cover the film, due to the impermeability of the film, can inhibit water evaporation, reduce the number of times of watering, and indirectly improve the ground temperature;

3, multi-layer cover, to keep the greenhouse greenhouse film sealing, the shed to build a middle shed or in the small arched shed with the covering of insulation materials, cover the film at night, and then the film, the greenhouse temperature will be increased. Thermal insulation materials, cover the film at night, film covered with straw or quilt;

4, mulching between rows to increase the temperature: greenhouse greenhouse rows covered with 5-8cm thick crop straw or rotting organic fertilizer, not only can daytime heat storage, night exothermic, effectively improve the temperature of the greenhouse, but also reduce the ground moisture evaporation, reduce air humidity, reduce the occurrence of greenhouse diseases;

5, ridging

6, additional cold-proof ditch, additional cold-proof ditch in the periphery of the greenhouse, ditch filled with thermal insulation materials, can also be effective heat preservation;

Three common means of temperature increase are the following:

1, the use of black film, the black color can increase heat absorption, more conducive to the increase in temperature;

2, to keep the film clean, increase the amount of sunlight intake to improve the greenhouse Temperature;

3, the use of heating equipment, such as heat lamps, air conditioning, furnace, etc., attention is paid to the use of furnace heating, the need to maintain air circulation;

4, the use of rows covered with straw or rotting organic fertilizers, not only can daytime heat storage, the night exothermic, effective in raising the temperature of the greenhouse, but also reduce the ground evaporation of water to reduce air humidity, reducing the occurrence of greenhouse diseases.