Operation points and precautions of fruit and vegetable freeze-drying machine

　　The following is a detailed introduction to the operating points and precautions of the fruit and vegetable freeze-drying machine:

　　1、 Preparation work

　　Firstly, please ensure that your device is in good operating condition and prepare the product for freeze-drying. Slice, strip or shape fruits and vegetables to increase surface area and improve drying efficiency.

　　2、 Set parameters

　　Set appropriate temperature, time, and vacuum level based on the material being processed. Generally speaking, the freeze-drying process of fruits and vegetables includes two stages: pre freezing stage and sublimation drying stage.

　　The temperature during the pre freezing stage is usually set between -40 ° C and -60 ° C to quickly freeze the moisture in the material into a solid, which takes about 24 hours.

　　The temperature setting for the sublimation drying stage is between -30 ° C and -50 ° C, with the aim of removing solid moisture frozen inside the material through sublimation. This process generally takes about 12-48 hours.

　　The vacuum degree is set within the range of 0.1-0.05 mbar, and excessively high or low vacuum degrees can affect the effectiveness of freeze-drying.

　　3、 Loading materials

　　Place the prepared materials evenly on the material rack, keeping a certain distance as much as possible to avoid contact with each other. Then push the material rack into the freeze-drying chamber, close the door and ensure good sealing.

　　4、 Start drying

　　Press the start button, and the device will automatically freeze dry according to the set parameters. Please pay attention to the working condition of the equipment. If any abnormal phenomenon is found, stop the machine immediately and troubleshoot.

　　5、 End drying

　　Stop the equipment operation when the freeze-drying reaches the predetermined time or weight loss rate. Wait for a few minutes for the material to cool naturally, then open the door and take out the material rack. Remove the materials from the material rack, package and store them.

　　6、 Precautions

　　1. Ensure the use of clean and pollution-free fruit and vegetable ingredients to ensure the quality of the final product.

　　2. When loading materials, they should be as flat and dispersed as possible to facilitate air circulation and moisture evaporation.

　　3. During the freeze-drying process, the operation status of the equipment should be regularly checked, and any problems should be promptly resolved.

　　4. After drying, the equipment should be cleaned in a timely manner to avoid residue affecting the next use.

　　5. Dry fruits and vegetables should be stored away from moisture and direct sunlight, and kept cool and ventilated.

　　We have briefly introduced the operating points and precautions of the fruit and vegetable freeze-drying machine here. The above are the operating points and precautions of the fruit and vegetable freeze-drying machine, hoping to be helpful to you. If you have any other questions, please feel free to ask me!

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