The reason why many people like to eat fruits is that they are not only delicious, but more importantly, they are rich in various nutrients needed by the human body, but fruits are easily rotten and deteriorated at room temperature, resulting in the loss of nutrients, and fresh fruits are not easy to store. . In order to retain the nutrients of the fruit to the greatest extent, with good rehydration, easy long-term storage, light weight and easy transportation, there is a freeze dryer. We are freeze dryer manufacturers china, this article will take you to know about fruit freeze dryer and FBL freeze dryer.
Characteristics and introduction of freeze-dried fruit
●Fresh: The seasonal fruits are freeze-dried immediately after picking, which avoids the nutrient loss caused by long-term storage of fruits and multiple logistics, and is healthier than the fruits in stock in supermarkets and fruit stores.
●Excellent: The top fruit varieties at home and abroad are selected, and the screening is strictly controlled. The freeze-drying production technology has been matured for many years. All products must pass 489 export-level inspections before leaving the factory, and the quality can be seen.
●Easy: It avoids the complicated process of fresh fruit freezing and cleaning and preservation, which is easy to carry when traveling or as a gift. Even patients, pregnant women or girls in menstrual period can eat it with confidence.
●Pure Crispy Fruit Chips Suitable for the crowd: suitable for all ages
Storage conditions of pure crisp fruit chips: sealed storage at room temperature away from light
Freeze-drying process and its advantages:
Freeze drying technology:
Freeze-drying technology is currently considered to be a very advanced food processing technology. Food freeze-drying is to first freeze the water in the food material, and then heat it under low temperature and vacuum conditions, so that the ice in the material sublimates and resolves into water vapor, and in this way, the water in the food is removed to obtain drying and dehydration. product.
In a vacuum environment of -40 °C, the water in the fruit is sublimated and dried. This process can well seal the flavor and nutrition of the fruit without complicated processing procedures. The whole process of freeze-drying is carried out under the condition of low temperature, low pressure and oxygen barrier. To put it simply, freeze-dried fruit is the use of ultra-fast freezing, which removes the moisture in the fruit while retaining the color, aroma and taste of the fruit. In this way, the problems of difficult transportation and storage of fruit can be solved, and the delicious fruit can be enjoyed anytime, anywhere.
Advantages of freeze drying:
●Freeze drying is carried out at low temperature, so it is especially suitable for many heat-sensitive substances. Such as proteins, microorganisms and the like will not denature or lose biological activity.
●When drying at low temperature, the loss of some volatile components in the material is very small, and the original nutrients are maintained.
●During the freeze-drying process, the growth of microorganisms and the action of enzymes cannot proceed, so the original shape can be maintained.
●Drying in a frozen state, the volume is almost unchanged, the original structure is maintained, and no concentration phenomenon occurs.
●The dried substance is loose and porous, in the form of sponge, dissolves rapidly and completely after adding water, and restores its original shape almost immediately.
●Because the drying is carried out under vacuum with very little oxygen, some easily oxidizable substances are protected.
●Drying can remove more than 95-99% of the water, so that the dried product can be stored for a long time without deterioration.
How to use FBL freeze dryer to make fruit freeze-dried?
Preprocessing
The source and application of raw materials are different, and the pretreatment methods are also different. For example, the pretreatment of fruit is to select, wash and cut into pieces, vegetables need to be blanched, and instant porridge needs to be cooked and placed on a plate, etc.
Pre-frozen
After the raw materials are pretreated, they are generally pre-frozen. This is because when there is a lot of water in the material, if the vacuum treatment is carried out directly, the gas dissolved in the water will escape due to the reduction of the external pressure, forming bubbles, resulting in voids inside and on the surface of the material, affecting the sensory quality.
Frozen
In order to solidify the moisture inside the material, quick freezing is usually required. The shorter the freezing time, the faster the material freezes, the smaller the internal crystals, and the smaller the mechanical damage to the material cells. Therefore, it is necessary to select an appropriate freezing speed according to the actual production.
Vacuum Drying
Vacuum drying is usually divided into two stages: sublimation drying and desorption drying. Sublimation drying is mainly aimed at free water in the material; analytical drying is mainly to remove adsorbed water that is strongly combined with solids. The degree of vacuum, temperature and plate thickness in the drying process directly affect the drying process and product quality.
The detailed usage of FBL freeze dryer is as follows:
1) Put the fruit into the lidded tray, then put the tray into the freeze-drying rack, place and fix the fruit temperature sensor, put the freeze-drying rack into the cold trap, cover the insulation cover for pre-freezing, Freeze until the fruit is completely frozen and keep for a while.
2) Take out the freeze-drying rack from the cold trap, quickly transfer the material tray to the freeze-drying rack with a lid, place the freeze-drying rack above the cold trap, and cover with a glass cover. Make sure that the lower end of the glass cover is in full contact with the "O" ring.
3) Tighten the inflation valve, click the "vacuum gauge" button on the screen, the screen shows that the vacuum degree is 110KPa, and then click the "vacuum pump" button to turn on the vacuum pump. The degree of vacuum drops rapidly, until the degree of vacuum is less than or equal to 10Pa, which is normal.
4) After a long time of drying, visually check whether the fruit is completely dry. Turn the gland handle above the glass cover clockwise to turn the screw on the gland frame and the gland plate down. Press the cap into the bottle to achieve a vacuum closure. Then open the vacuum charging valve of the vacuum freeze dryer manufacturers china, click the "vacuum pump" button, and the vacuum pump stops running. Click the "Gauge" button to turn off the vacuum gauge.
Remove the glass cover and take out the material tray from the freeze-drying rack. After the fruit in the tray is packaged, the cover configuration and drying are completed. Click the "Refrigerator" button to turn off the compressor and the device stops running.
How much is a fruit freeze dryer?
Delicious and healthy fruit and vegetable crispy freeze-drying processing needs to be carried out in a specific device, which is called a food freeze dryer manufacturers china. Because it is commonly used in the freeze-drying of fruits and vegetables, it is also called fruit freeze-drying machine and fruit and vegetable freeze-drying machine. How much is a new freeze dryer? Different freeze-drying yields have different equipment prices, if you are interested, please contact us.
