CBFI Direct Cooling Ice Block Machine: Innovating Litchi Preservation Technology and Empowering the Industrial Upgrade of the "World Litchi Capital"
Pain points in the lychee preservation industry and limitations of traditional methods
As the world's largest producer of lychee, China has an annual output of over 5 million tons, accounting for more than 70% of the global total. However, the characteristic of lychee that changes color in one day, fragrance in two days, and taste in three days has made its preservation a global agricultural logistics challenge. In the traditional preservation process, lychee faces the following challenges after harvesting:
1. Field heat accumulation: After harvesting, lychee respiration releases heat. If not cooled down in time, the core temperature can easily rise above 25 ℃, accelerating decay;
2. Oxidative discoloration: Polyphenol oxidase in the peel and flesh is activated under high temperature and high humidity conditions, leading to black spots and browning;
3. Transportation loss: During long-distance transportation, relying on ordinary ice cubes for cooling can result in uneven mixing of ice and water, large temperature fluctuations, and a loss rate of up to 20% -30%.
Traditional solutions, such as dry ice cooling or pre cooling warehouses, have drawbacks such as high costs, complex operations, and short shelf life (only 3-5 days), making it difficult to support long-distance transportation and staggered market demand.
Technological breakthrough and design innovation of direct cooling ice block machine
The 10 ton/day direct cooling ice block machine developed by CBFI is specially designed for lychee preservation. Through the "fast cooling+precise temperature control" three in one mode, it achieves full chain preservation guarantee from the field to the market.
(1) Core technical principles
1. Direct cooling ice water circulation system
The ice block machine adopts plate heat exchanger+countercurrent refrigeration technology, placing ice blocks directly in low-temperature circulating water, and directly contacting lychee through ice water mixture. Within 5 minutes, the core temperature of the fruit is rapidly reduced from 30 ℃ during harvesting to 2-4 ℃ (traditional pre cooling takes 4-6 hours), effectively inhibiting enzyme activity and microbial growth.
2. Physical properties of ice blocks
Standardized dimensions: Ice blocks measuring 30cm in length, 20cm in width, and 10cm in height, with a density of 0.92g/cm ³, suitable for transportation and preservation container designs;
• Controllability of melting: In an environment of 0-4 ℃, the melting rate of ice blocks is ≤ 0.3kg/h, providing a sustainable constant low-temperature environment;
Cleanliness: The ice block raw materials are purified by three-stage RO reverse osmosis (water quality reaches food grade) to avoid chemical pollution.
(2) Modular design of the system
1. Ice making unit: 24-hour continuous block making, with a daily production capacity of 10 tons;
2. Ice water circulation pool: equipped with mixing blades and temperature sensors to ensure even distribution of ice water mixture;
The CBFI direct cooling ice block machine is not only an innovation in preservation technology, but through precise temperature control, cost optimization, and environmentally friendly design, it truly realizes the "preservation journey of thousands of miles" for lychee that "changes taste in a day", helping the "World Lychee Capital" transform from a production advantage to a dual discourse power of quality and market.
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