The dryer is a kind of mechanical equipment that uses heat energy to reduce the moisture content of materials. It is used to stop the drying operation of objects and vaporize the moisture (usually moisture or other volatile liquid components) in the materials after heating to obtain solid materials with regular moisture content. The purpose of drying is to meet the requirements of material application or further processing. Hopper Dryer,Used Hopper Dryer,Dehumidifying Hopper Dryer,container Hopper Dryer Ningbo Chenwei Machinery Technology Co.,Ltd , https://www.chenweimachinery.com
Humidity in the field should be reduced as much as possible throughout the growing season to control the occurrence of blight, anthrax, blight, blight and leaf blight. The drip follows the principle of “wet without squeaking, dryness, and droughtâ€. According to the scientific management of the water requirement of the seedless watermelon during each growth period, the relative humidity of the soil is maintained at 50% to 60%. 80% of roots of seedless watermelon distributed 2030 from the surface. In the soil layer, the topsoil is very easy to dry, so the drip pipe should be a small number of times. With water topdressing, many times topdressing urea and nitrogen, phosphorus, and potassium compound fertilizers after growing and growing cucumbers to increase the yield and commodity rate of seedless watermelons.
The humidity sensor on the leaf surface of the watermelon measures and controls the humidity of the leaf surface of the watermelon. It is found that the covering film further improves the drip irrigation water saving effect, achieves a stable temperature and moisturizing effect, avoids excessive air humidity, reduces anthrax, blight, blight, leaf blight, and the like. happened.
The future development of dryers will develop and improve dryers under the conditions of deepening the study of drying mechanism and material drying characteristics, and controlling the operation conditions of different materials; In addition, large-scale, high strength, high economy, and improved compliance with raw materials and quality are the fundamental trends of dryer development. Now let's introduce the function, working principle, classification, operating procedures, selection instructions and cleaning methods of the dryer.
The dryer acts as a refrigeration compressor to suck the low pressure (low temperature) refrigerant in the evaporator into the compressor cylinder. The refrigerant steam is compressed, and the pressure and temperature rise at the same time; The refrigerant steam with high pressure and high temperature is pressed to the condenser. In the condenser, the refrigerant steam with higher temperature and cooling water or air with lower temperature stop heat exchange.
The heat of the refrigerant is taken away by water or air and condensed, and the refrigerant vapor becomes liquid. This local liquid is then sent to the contraction valve, which is throttled into a low temperature and low pressure liquid and enters the evaporator; The low temperature and low pressure refrigerant liquid in the evaporator absorbs the heat of the compressed air and vaporizes (commonly known as "evaporation"), while the compressed air condenses a large amount of liquid water after cooling; The refrigerant steam in the evaporator is sucked away by the compressor.
Seedless watermelon under the application of membrane drip irrigation technology, the effect of increasing production is very obvious, if there is no membrane drip irrigation technology will affect its yield and quality. The application of seedless watermelon drip irrigation technology not only improves the utilization rate of fertilizer and water, reduces the humidity of leaf surface, reduces the occurrence of pests and diseases, but also saves a lot of water resources and reduces the amount of chemical fertilizers. The control of the leaf surface humidity is also one of the important measures for the cultivation of the watermelon. The determination of the leaf surface humidity can be performed using a leaf surface humidity sensor.