Every year during the cherry ripening season, farmers and distributors face a common challenge - traditional refrigeration technology is unable to meet the preservation needs of cherries and other berries. Cherries have high moisture content and thin and tender skin, making them prone to rapid quality decline after harvesting due to dehydration, oxidation, or microbial growth. Data shows that cherries stored in regular refrigeration usually have a shelf life of only 5-7 days, which can be shortened to 3-4 days due to changes in taste and appearance. This not only causes a significant loss of agricultural products, but also results in high costs for distributors in cold chain logistics.
From 'slow freezing' to 'precise freshness locking'
The core contradiction of traditional freezing technology lies in "speed" and "uniformity". Conventional freezing equipment uses static cold air or contact freezing, which results in a temperature difference between the surface and interior of the fruit. The ice crystals formed by water freezing can damage the cell structure, causing "blistering", nutrient loss, and poor taste after thawing. However, cherries and other berries have a particularly prominent problem due to their large surface area to volume ratio. Therefore, the industry urgently needs a technological solution that can achieve rapid freezing while maximizing the preservation of the original ecology of the fruit.
CBFI fluidized freezing machine: a solution designed specifically for berries
As an innovative equipment for berry fruits, the core technology of CBFI fluidized freezing machine lies in the principle of "dynamic fluidized freezing". This technology uses a precisely controlled high and low temperature airflow system to suspend and continuously flip cherries during the freezing process, forming a fluidized state similar to boiling. This process brings about three breakthroughs:
1. Uniform freezing: Airflow penetrates the surface of each fruit, eliminating the temperature gradient of traditional freezing and avoiding the problem of excessive ice crystals.
2. Moisture locking freshness: Dynamic airflow accelerates water evaporation control, while the low-temperature environment quickly freezes free water between cells, reducing cell membrane damage and locking in more than 85% moisture content.
3. Nutrition and taste retention: Experimental data shows that cherries treated with CBFI have a vitamin C retention rate of up to 92%, a sweetness decay rate of less than 5%, and a flesh texture close to fresh.
The fluidization design of CBFI relies on the precise combination of fluid mechanics and thermodynamics. The fruit is supported by porous plates inside the device, and high-pressure airflow is evenly blown in from below, causing the cherries to suspend and constantly collide and roll. At this point, the airflow temperature is precisely controlled within the range of -25 ℃ to -30 ℃, and with the help of a humidity control module, the freezing process is ensured to be completed within 15-20 minutes. Compared to traditional quick freezing machines that require more than 30 minutes of freezing time, CBFI has significantly improved efficiency and reduced energy consumption by about 18%. Another key aspect of this process is the use of "supercooling" technology, which rapidly lowers the fruit below the crystallization point in the initial stage to avoid expansion and damage during the formation of ice crystals.
The actual contribution of CBFI to the cherry industry goes far beyond extending shelf life. In terms of loss rate, the daily loss of cherries in traditional cold storage can reach 2% -3%, while cherries that have been frozen can be stably stored below -18 ℃ for 6-8 months, reducing the loss rate to below 0.5%. This means that dealers can flexibly adjust the listing time, avoid the low price period of centralized listing, and increase the premium space.
In addition, the uniformity of fluidized freezing solves the problem of grading. After traditional freezing, some cherries may become soft, rotten or shriveled due to uneven freezing, resulting in high grading costs. The consistency of appearance and hardness of fruits treated with CBFI is over 95%, greatly simplifying the processing flow and reducing manual sorting input.
The popularization of CBFI technology is driving the transformation of the fresh food industry supply chain. For the planting end, it reduces the dependence on the "golden harvest period", and farmers can harvest in batches according to the plan, reducing losses caused by weather or insufficient manpower. For the processing and sales end, frozen cherries can enter the market in standardized product form, supporting deep processing fields such as pre made food and fruit juice drinks.
The technological upgrade direction of CBFI may focus on intelligence and modularization. Real time monitoring of fruit freezing status through sensors and dynamic adjustment of airflow parameters; In addition, the potential application of this technology principle in other berries such as strawberries and blueberries will further expand market boundaries.
