一．what is a freeze dryer
The freeze-dryer mainly works based on the principle of sublimation so that the water in the material is directly removed in the form of ice sublimation as water vapor after being frozen so as to achieve the freezing and drying effect on the material.
Other common drying methods in the market usually require heating or blowing the materials, which can easily damage the materials; however, the lyophilized substance can completely retain the flavor, nutrition, shape, etc. of the material itself, and the lyophilized substance can be stored for a long time at room temperature due to its low water content and can be quickly re-watered, so it is widely used in food, biological products, medicine, and other fields. If you do not know where to buy a freeze dryer, you can contact OrangeMech, which is a global machine and can provide you with the highest-quality products and professional technology.
二. how does a freeze dryer work
The best way to understand the machine is to start from its working principle, which helps to understand its structure setting later. The basic working principle of the freeze dryer is based on the three-state change of water. Under the high vacuum state, the water pre-frozen in the material is directly removed by the sublimation principle in the form of ice sublimation as water vapor so as to achieve the purpose of freeze drying. The core composition of the machine is also very important after understanding the principle. Next, we will show you the core structure of the lyophilizer.
三．Composition of freeze dryer
The main components of the freeze dryer include:
1. Drying box: It is also called a drying bin, which is usually made of stainless steel and can provide a high vacuum environment. There are multilayer shelves inside, and materials can be placed in the stainless steel tray on the shelf. Each shelf is usually equipped with a temperature-measuring probe to monitor the material temperature during the freeze-drying process.
2. Vacuum system: It is usually composed of a vacuum pump, a vacuum valve, and a pipeline, which can pump high vacuum inside the drying oven so that the ice in the material can be directly sublimed into steam.
3. Cold trap: It is also called a water trap, which is usually located between the drying oven and the vacuum pump and is specially used to trap water vapor. It will freeze the water vapor sublimated from the material into ice and absorb it on the coil so as to prevent the water vapor from entering the vacuum pump. It can protect the vacuum pump and maintain the vacuum environment.
4. Refrigeration system: It usually consists of a compressor, condenser, evaporator, and other components to provide low temperature for the shelf and cold trap.
5. Heating system: Generally, circulating medium heating or electric heating is adopted to provide heat for material sublimation.
四．The freeze-drying process of a freeze dryer
With the above understanding of the working principle and core components of the lyophilizer, the material freeze-drying process is also the key to understanding the lyophilizer. The main links of freeze-drying are
1.First place the material on the shelf of the drying oven, and then close the oven door to form a closed cavity inside the drying oven.
2. The refrigeration system starts to work and cools the shelf of the drying oven to completely freeze the water in the materials into ice.
3.The vacuum pump starts to pump air to form a high vacuum environment inside the drying oven and the cold trap.
4. The heating system starts to supply heat, making the ice on the material rise to water vapor.
5. The sublimed water vapor enters the cold trap and is frozen and attached to the coil.
6. Upon completion of drying, charge air to break the vacuum, open the drying oven, and take out the lyophilized materials.
五．Summary
Through the above contents, we believe you have learned what a freeze dryer is and how a freeze dryer works. So where to buy a freeze dryer? OrangeMech can provide you with high-quality machines and professional technologies and provide professional advice according to your needs to help you choose. If you have any further questions about freeze-dryers or other food machinery, you are welcome to ask OrangeMech a question.
