The cooling rate reflects the cooling capacity of the refrigeration system. Therefore, in the absence of special requirements, it is an ideal choice to use a cold trap temperature of about -60 ☌.
The effect of cold trap temperature on the water-capturing ability was experimentally demonstrated that when the temperature of the cold trap dropped from -35☌ to -55☌, the water-capturing capacity was significantly improved. Freeze-drying with a cold trap temperature of -80☌ It is suitable for lyophilization of some special products. Freeze-drying machines with a cold trap temperature of about -60☌ are suitable for freeze-drying of most products. Freeze-drying with a cold trap temperature of -45☌ is suitable for some products that are easy to freeze-dry.
Freeze dryer machine series#
The cold trap temperature of the experimental series freeze dryer mainly has several grades such as about -45☌, about -60☌, and about -80☌. In theory, the lower the temperature of the cold trap, the stronger the water trapping ability of the cold trap. The cold trap is a device for trapping water in the freeze-drying process. When purchasing a freeze dryer, it is not only necessary to consider the price of the freeze dryer, but also the temperature of the cold trap, the cooling rate, the temperature uniformity of the board, the flatness, and other indicators. Customers need to buy a freeze dryer that suits them according to their needs. When choosing a freeze dryer, you need to pay attention to many specific details. It releases heat to the cooling medium (water or air), condenses into a high-pressure liquid, is throttled by a throttling device to a low-pressure and low-temperature liquid, and enters the evaporator again to absorb heat and vaporize. The working principle of the freeze dryer is that after the liquid refrigerant absorbs the heat of the cooled material in the evaporator, it is vaporized into low-pressure and low-temperature steam, which is inhaled by the compressor, compressed into high-temperature and high-pressure steam, and then discharged into the condenser. Freezing The product obtained by drying is called a lyophilizer, and the process is called lyophilization. It is a process of quickly freezing the dried material at low temperature, and then directly sublimating the frozen water molecules into water vapor in a suitable vacuum environment. How does Freeze Dryer work？įreeze drying is a drying technology using the principle of sublimation. Its refrigeration system is mainly composed of the following components: compressor, refrigerant, oil separator, water condenser, filter drier, intercooler, sight glass, solenoid valve, hand valve (top cover valve), expansion valve, evaporation (plate exchanger, rear box condensing coil), vapor-liquid separator, return air filter, pressure gauge, pressure control relay, CPCE (energy regulator), safety valve, refrigeration pipeline, etc. The refrigeration system is the most important part of the freeze dryer and is called the “heart of the freeze dryer”. The main components are the drying box, condenser, refrigeration unit, vacuum pump, heating/cooling device, etc. The freeze dryer is composed of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. Polarimeters & Refractometer & Melting Point Meter Expand.GCMS (Gas Chromatograph and Mass Spectrometry).
Freeze dryer machine full#
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