There are two main types of refrigeration for the unit: air cooling and water cooling. The germplasm resource pool built in the early days was cooled by water-cooled refrigeration units, and the investment was large. The germplasm resource bank has a small cooling load, and the air-cooled refrigeration unit is easy to install and has a low cost. Therefore, the germplasm reservoirs that were later built are basically air-cooled. The national crop germplasm resource bank refrigeration unit cooling method is air-cooled. The unit is a piston type refrigeration compressor. During cooling operation, the compressor discharges the refrigerant (environmental protection R404A) gas and enters the air-cooled condenser to condense. After condensation, the high-pressure refrigerant liquid is throttled by the expansion valve before the evaporator, so that the refrigerant is reduced in temperature and pressure, and then enters the evaporator in the refrigerator to absorb heat and cool. The expansion valve and evaporator in the chamber are double inlet and double outlet. The refrigerant absorbs heat through the evaporator and evaporates into low-pressure gas. The refrigerant is sucked into the compressor and compressed again into the next cycle. After the internal temperature of the library is reached, the cycle ends. Spider Crane,Spider Crank Truck,5Section Spider Crank Truck,5.0Tons Spider Crane Truck Hubei ruiyate Automobile Co.,Ltd , https://www.ruiyateworkingtruck.com
Dehumidification technology: Dehumidification technologies used in seed storage include electric heating dehumidification technology, frozen electric heating defrosting dehumidification technology, lithium chloride solution dehumidification technology, and hot fluorine recovery technology. The combined temperature and humidity control of the freezing and dehumidifying technology has a small footprint, high reliability, long service life, low energy consumption, and low maintenance costs. The national crop germplasm resource bank adopts a dehumidification and dehumidification mode. When the relative humidity inside the reservoir is higher than the requirement, the heat recovery or electric heating system starts to work. Heat Recovery System The compressor discharges the refrigerant gas through the heat recovery flow control valve and enters the heat exchanger inside the reservoir. The relative humidity of the air is reduced and sent to the reservoir by heating the cold humid air from the evaporator. After the refrigerant condenses through the heat exchanger, it becomes a high-pressure liquid, which is throttled through the expansion valve to reduce the temperature and depressurization, and then enters the evaporator to absorb heat and evaporate into gas, which is then inhaled by the compressor. The compressor exhausts again into the heating heat exchanger to begin the next cycle. The electric heating method is to add a special electric heating tube in the heat exchanger on the outlet side of the evaporator, so that the cold and humid air is heated to reduce the relative humidity and sent to the reservoir. The dehumidification is finished when the relative humidity in the storage tank reaches the set value.