What is the best freeze dryer?
In theory, the lower the cold trap temperature is, the stronger the water catching capacity of the cold trap is. However, the lower the temperature of the cold trap is, the higher the refrigeration requirement is, and the higher the machine cost and operation cost are.The effect of cold trap temperature on water capture capacity The experimental results show that the cold trap temperature drops from -35℃ to -55℃, and the water absorption capacity of the cold trap is obviously improved, but the temperature of the cold trap is lower than -55℃. Therefore, in the absence of special needs, the cold trap temperature of -60°C is an ideal choice. The Kassel freeze dryer adopts mixed refrigerant refrigeration technology. In the same refrigeration unit, the refrigeration temperature is low, the refrigeration capacity is large, the stability is high, and the failure rate is low.
The uniformity and smoothness of the plate temperature have a great influence on the uniformity of product quality. The better the temperature uniformity and flatness, the better the homogeneity of freeze-dried product quality. The shelf temperature control of freeze-drying machine includes heater type and middle flow type. The temperature uniformity and flatness of freeze-drying machine shelf with intermediate fluid control layer is good. The plate layer of this freeze-drying machine is hollow sandwich structure, and the cooling and heating of the plate layer are realized by the circulation of the intermediate fluid in the flow channel inside the plate layer, so the plate temperature is uniform and uniform.
