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Pre-cooling is an important part of the post-harvest cold chain logistics of litchi. Spray pre-cooling can quickly reduce the temperature of litchi. Mastering the best process parameters of spray pre-cooling can improve the pre-cooling efficiency. Taking the "Huaizhi" litchi as the research object, the orthogonal experiment was carried out by selecting factors such as spray temperature, spray flow, and litchi layer number, and the optimal process parameters of litchi spray precooling were obtained through range analysis and variance analysis. The results show that when the spray temperature is 5°C, the spray flow rate is 5 L/(s•m), and the number of litchi layers is 3, the 7/8 litchi pre-cooling time is shorter, the pre-cooling uniformity σ is small, and the pre-cooling Best results.

Experimental Optimization Of Litchi Spray Pre-Cooling Process Parameters