Cordyceps, as a high-value traditional Chinese medicine, is highly regarded for its bioactive components and medicinal value. Freeze drying technology, as an advanced dehydration technique, has been widely used for the preservation, processing, and preservation of cordyceps. As an important tool in this technology, the cordyceps freeze-drying machine plays a crucial role in the production and processing of cordyceps.
1、 Working principle of cordyceps freeze-drying machine
Freeze dryer, also known as freeze-drying machine, is mainly used to remove water from cordyceps through freezing, sublimation and other processes, retaining its original nutritional and medicinal components. The basic working principle includes the following steps:
1. Freezing stage
Firstly, the cordyceps is pre treated and placed in a freeze dryer, where the temperature is lowered to a lower level. During this process, the moisture of cordyceps quickly freezes into solid ice crystals.
2. Sublimation stage
At low temperatures, through depressurization treatment, ice crystals begin to directly transform from solid to gas, and water sublimates directly without going through the liquid phase. This process is usually carried out in a vacuum environment to lower the temperature and promote the removal of moisture.
3. Drying stage
The sublimated water vapor is removed through a condenser, and the moisture in the cordyceps gradually decreases until the moisture is removed, completing the freeze-drying process. Throughout the entire process, the structure, color, and composition of cordyceps remained almost unchanged, maintaining its original nutrition and medicinal properties.
2、 Operation steps of cordyceps freeze-drying machine
1. Preparation work
Clean the freeze dryer: Before use, ensure that the interior of the freeze dryer is clean and free of foreign objects. Especially in the freezing and drying rooms, dust and residue should be regularly cleaned.
Cordyceps pretreatment: Conduct necessary pretreatment according to the actual situation of cordyceps. Cordyceps can be cut or segmented according to different freeze-drying needs to meet the processing requirements of the freeze-drying machine. During the preprocessing process, the moisture content of cordyceps needs to be carefully controlled to avoid affecting the subsequent freeze-drying effect.
2. Place the cordyceps into the freeze dryer
Reasonable placement: Place the processed cordyceps evenly on the tray of the freeze-drying machine. Be careful not to stack too densely to avoid affecting the flow of air and the sublimation process of moisture.
Set parameters: Set the working parameters of the freeze dryer on the operation interface, such as freezing temperature, sublimation temperature, vacuum degree, etc. Different varieties of cordyceps may require different parameters. It is recommended to refer to the equipment manual or adjust according to the actual situation.
3. Start the freeze dryer
Start the equipment and the freeze dryer begins the freezing, sublimation, and drying processes. During the process, the equipment will automatically control the temperature and pressure changes to ensure that the freeze-drying effect of cordyceps reaches the expected target.
4. Monitoring process
Temperature and humidity monitoring: During the freeze-drying process, operators need to monitor the temperature, humidity, and other parameters of the freeze-drying machine to ensure stable operation of the entire process. At this time, the built-in display screen or remote monitoring system of the freeze dryer can be used for data viewing.
Regular inspection: Check the appearance and texture of cordyceps to ensure that there is no excessive freeze-drying or non drying.
5. Complete the freeze-drying process
End operation: After the equipment completes the freeze-drying process, the system will automatically send a prompt signal. At this point, the device can be stopped and the freeze-dried cordyceps can be removed.
Cooling: Due to the heat generated during the freeze-drying process, the extracted cordyceps needs to be cooled to room temperature to ensure that it is not damaged by heat.
6. Packaging and Storage
Packaging: After freeze-drying, cordyceps usually needs to be sealed to avoid the influence of moisture and external environment on the quality of cordyceps. Seal using aluminum foil bags, vacuum packaging, and other methods.
Storage: Store the packaged cordyceps in a cool, dry, and dark environment. The storage conditions for freeze-dried cordyceps are relatively strict, maintaining a low temperature and low humidity environment.
3、 Operation precautions
1. Selection and treatment of cordyceps
Choosing high-quality cordyceps raw materials is a prerequisite for the freeze-drying process. Fresh and non decaying cordyceps should be selected to avoid using cordyceps that have been stored for too long or have poor appearance. Cleaning and removing impurities from cordyceps are also very important during pretreatment to avoid affecting the freeze-drying effect.
2. Correct setting of equipment parameters
The parameter settings of different models of cordyceps freeze-drying machines may vary. Operators should adjust the freezing temperature, sublimation temperature, and vacuum degree reasonably according to the equipment manual and the characteristics of the cordyceps species to ensure a smooth drying process.
3. Environmental temperature and humidity control
During the use of a freeze-drying machine, environmental temperature and humidity have a significant impact on the freeze-drying effect. Excessive temperature or humidity in the operating room may affect the freeze-drying effect of cordyceps. Therefore, maintaining a suitable temperature and humidity in the environment is crucial.
4. Regular maintenance and upkeep of equipment
Regularly clean the freeze dryer and check the working status of key components such as the freezing system and vacuum pump. Timely replacement of components to ensure the stability and long-term efficient operation of the equipment. Especially for the freezing and sublimation functional modules, their cooling effect and vacuum degree should be regularly checked to avoid equipment failure.
5. Operational safety
Strictly follow the safety operating procedures when operating the freeze dryer. The operation of starting, stopping, and adjusting equipment should be carried out under the premise of ensuring safety, in order to avoid equipment damage or personnel injury caused by improper operation.
Through the introduction in this article, we have gained a deep understanding of the operating steps and precautions of the cordyceps freeze-drying machine. Proper operation and maintenance of the freeze-drying machine are key factors in ensuring high-quality cordyceps products.